CN101015224A

CN101015224A - Radio network control

Info

Publication number: CN101015224A
Application number: CNA2005800242300A
Authority: CN
Inventors: 维达特·艾尤鲍格鲁; 金永俊; 阿瑟·J·巴拉贝尔; 桑杰依·彻里安
Original assignee: Airvana Inc
Priority date: 2004-05-18
Filing date: 2005-05-17
Publication date: 2007-08-08
Anticipated expiration: 2025-05-17
Also published as: CN101015224B

Abstract

A first session is established for a first mobile access terminal (AT) on a first radio network controller (RNC) via a first radio node (RN). A first traffic channel is established between the first mobile access terminal (AT) and the first radio network controller (RNC). A first plurality of packets are sent and received over the first traffic channel. The first plurality of packets travel between a first radio node (RN) and the first radio network controller (RNC) without passing through a second radio network controller (RNC). The first traffic channel is maintained as the first access terminal moves from a coverage area of the first radio node (AT) to a coverage area of a second radio node (RN). A second plurality of packets travel between the second radio node (RN) and the first radio network controller (RNC) without passing through another radio network controller. In a radio access network, multiple radio network controllers are connected to several radio nodes using a network.

Description

Wireless network control

Technical field

The present invention relates to wireless network control.

Background technology

High Data Rate (HDR) is emerging mobile wireless access technique, it makes it possible in any position, any time visit individual broadband the Internet service (referring to P.Bender, et al., " CDMA/HDR:ABandwidth-Efficient High-Speed Wireless Data Service for Nomadic Users ", IEEE Communications Magazine, July 2000, and 3GPP2, " Draft Baseline Text for1xEV-DO; " August 21,2000 (P.Bender etc. " CDMA (code division multiple access)/HDR: the high speed wireless data service that is used for mobile subscriber's bandwidth efficient ", IEEE (Institute of Electrical and Electric Engineers) magazine of communicating by letter, in July, 2000,3GPP2, " 1xEV-DO draw up benchmark text ", Augusts 21 in 2000 order)).HDR by Qualcomm exploitation is a kind of air interface of optimizing for the IP Packet data service, and described IP Packet data service can only be used the frequency spectrum of (1X) 1.25MHz to provide to reach each sector 2.46M bps shared forward link transmission rate.With CDMA2000 accessing wirelessly (TIA/EIA/IS-2001, " Interoperability Specification (IOS) for CDMA2000 NetworkAccess Interfaces; " May 2000 () TIA/EIA/IS-2001, " inter-operability specification of CDMA2000 network access interface (IOS) ", in May, 2000) and Wireless IP network interface (TIA/EIA/TSB-115, " Wireless IP Architecture Based on IETF Protocols; " June 6,2000, andTIA/EIA/IS-835, " Wireless IP Network Standard; " 3rd Generation PartnershipProject 2 (3GPP2), Version 1.0, July 14,2000 (TIA/EIA/TSB-115, " based on the wireless IP framework of IETF agreement ", on June 6th, 2000, TIA/EIA/IS-835, " Wireless IP network standard ", third generation collaborative project 2 (3GPP2), version on July 14th, 1.0,2000)) compatibility, can be from mobile access terminal (AT) to fhe global the Internet based on the IP technology and integral body is set up the HDR network, therefore make full use of the scalability of IP network, redundant and low-cost.

HDR is adopted as the new standard in CDMA2000 family by TIA (telecommunications industry association), promptly only be used for high-speed data (DO) the business evolution of current 1xRTT standard of---being called as HRPD (High Rate Packet Data) in the past---is also referred to as 1xEV-DO or IS-856.

Usually use and realize the IS-856 system at the radio access network framework shown in Fig. 1.At this, access terminal (AT) 10 can be desktop computer, PDA(Personal Digital Assistant), double mode voice/data mobile phone or other device, and they have built-in IS-856 and support.

The whole management service zone of accessing wirelessly provider can be divided into one or more sub-networks (or subnet) 12,14.Each subnet 12 comprises one group of radio node (RN) 16,18 and one or more radio network controller (RNC) 20,22.Described RN is connected to RNC by backhaul network 24.In existing 2G and 3G wireless network, each RN uses special leased line or ATM permanent virtual circuit (pvc) and only is connected to a RNC.And RNC uses special leased line or ATM PVC and is connected to each other.In the IP-based radio access network of a new generation, can use share I P or Metro Ethernet to realize described backhaul network, the multi-to-multi that described share I P or Metro Ethernet are supported between RN and the RNC connects.

Each RNC controls 25-100 RN usually.Each RN supports 1-4 carrier wave usually.Each carrier wave has the bandwidth of 1.25MHz.And each cell area (not shown) is divided into a plurality of sectors (3-6 usually) usually, and RN has a wireless transceiver 27 that is used for each sector.

Each RNC is connected to one or more packet data serving nodes (PDSN) 28 (referring to the TIA list of references of as above quoting) by IP network 26.RNC communicates by letter with PDSN by the standard interface that is called as R-P (packet radio) interface 30.Described R-P interface further is divided into two interfaces: the A10 interface is used to carry data; The A11 interface is used for carrier signaling.PDSN can be counted as supporting ambulant edge router; It connects by the link layer that accesses network remains to AT.PDSN also is connected to the aaa server 32 of be used for discriminating, authorize and charge (AAA).

In case AT is connected to network, the then session of its foundation and RNC, and from RNC reception link layer address.Described session represents that RNC need serve all information of AT.In the IS-856 radio access network (IS-878) by the current definition of 3GPP2 in the 1xEV-DO IOS stage 1, each RN is associated uniquely with RNC, and each subnet only comprises a RNC.As a result, when AT from the overlay area of a RNC when move the overlay area of another RNC, AT switches, it comprises that session transmits.

When the AT of each dormancy passed through sub-net boundary, AT started the dormancy switching by sending UATI_Request (UATI request).The 128 bit SectorID (sector ID) that AT is being broadcasted by the sector by monitoring discern the needs that dormancy is switched.All sectors that belong to same subnet have the SectorID that falls in the particular range.The 128 bit general-purpose accessing terminal identifiers (UATI) that are assigned to the AT in given subnet fall in the same scope.When AT moved in the overlay area of another subnet, AT compared its UATI with the SectorID that is broadcasted by its serving sector.When these did not belong to same scope, AT knew it by sub-net boundary, and started the dormancy switching by sending UATI_Request.

First purpose that dormancy is switched is that notice PDSN is to the grouping of new Serving RNC transmission at the arrival of that AT.The dormancy switching relates to from old Serving RNC redistributes R-P (A10) to new Serving RNC.Do not have such switching, PDSN will send grouping to old Serving RNC.Because old Serving RNC is not known in the position of the AT of its subnet outside, so the grouping of AT may be lost.

Second purpose that dormancy is switched is to transmit session information between RNC.In IS-856, each RNC preserves the special session information about AT.Such session information need send by air interface.Session information comprises general-purpose accessing terminal identifier (UATI), is used for safe key and other agreement constants that access channel is differentiated and encrypted.When AT is by RNC border (being subnet in this case) at every turn, need distribute new UATI to AT, and remaining session information need be sent to new Serving RNC from old Serving RNC.Such transmission need be between RNC network linking.Do not have such session to transmit, each switching between RNC will cause new and long session foundation, take previous air resource, and cause delay.When the area of coverage of RNC hour, the frequent generation switched in dormancy, causes excessive use air link resource (being used for new UATI distributes), RNC to be used to realize that extra process and RNC that session transmits are used to redistribute the extra process that A10 is connected with PDSN.

Summary of the invention

In one aspect, there is a kind of method.Described method comprises: with the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes explicitly, on first radio network controller, set up first session via first radio node for the first mobile access terminal.Described method also comprises: set up second session for the second mobile access terminal via second radio node on second radio network controller, and set up first Traffic Channel between described first mobile access terminal and described first radio network controller.Described method also comprises: send and receive more than first grouping by first Traffic Channel, wherein, described more than first individual being grouped between first radio node and first radio network controller are propagated, and not by second radio network controller.Described method also comprises: when first access terminal from the overlay area of first radio node when move the overlay area of second radio node, keep first Traffic Channel, wherein, individual being grouped between second radio node and first radio network controller propagated more than second, and not by another radio network controller.Described method also comprises: when first access terminal is in the resting state in the overlay area from first radio node after move the overlay area of second radio node, on second radio network controller, set up new session, perhaps carry out from first radio network controller and switch to the dormancy between RNC of second radio network controller for the first mobile access terminal.

In yet another aspect, there is a kind of method.Described method comprises:---each is implemented in described radio network controller on the hardware platform based on frame with a plurality of server cards---sets up first session for the first mobile access terminal via first radio node explicitly on first radio network controller with the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes.Described method also comprises: set up first Traffic Channel between described first mobile access terminal and described first radio network controller; Send and receive more than first grouping by first Traffic Channel, wherein, described more than first individual being grouped between first radio node and first radio network controller are propagated, and not by any other radio network controller.Described method also comprises: set up second Traffic Channel between the second mobile access terminal and second radio network controller; And send and receive more than second a grouping by second Traffic Channel, wherein, described more than second are grouped between second radio node and second radio network controller and propagate, and not by any other radio network controller.Described method also comprises: when first access terminal from the overlay area of first radio node when move the overlay area of second radio node, keep first Traffic Channel, individual being grouped between second radio node and first radio network controller propagated more than the 3rd, and not by another radio network controller, and when moving to the overlay area of second radio node, the first mobile access terminal keeps first session.

In yet another aspect, have a kind of computer program, it visibly is included in the information carrier, and is adapted to operate in the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes.Described computer program comprises following instruction: described instruction is moved makes receiving and processing device set up first session for the first mobile access terminal via first radio node on first radio network controller, and sets up second session for the second mobile access terminal via second radio node on second radio network controller.Described computer program also comprises following instruction: described instruction further is caught data processing equipment by operation and sets up first Traffic Channel between the first mobile access terminal and first radio network controller, and send and receive more than first grouping by first Traffic Channel, wherein, described more than first individual being grouped between first radio node and first radio network controller are propagated, and not by second radio network controller.Described computer program also comprises following instruction: described instruction by further operation make data processing equipment when first access terminal from the overlay area of first radio node when move the overlay area of second radio node, keep first Traffic Channel, wherein, individual being grouped between second radio node and first radio network controller propagated more than second, and not by another radio network controller.

In yet another aspect, there is a kind of mobile wireless network.Described mobile wireless network comprises first radio network controller, second radio network controller, first radio node, second radio node, the first mobile access terminal and the second mobile access terminal.The described first mobile access terminal is associated with first session of setting up on first radio network controller via first radio node with first Traffic Channel of first radio network controller foundation.The described first mobile access terminal sends and receives more than first grouping by first Traffic Channel, and wherein, described more than first individual being grouped between first radio node and first radio network controller are propagated, and not by second radio network controller.The second mobile access terminal is associated with second session of setting up on second radio network controller via second radio node.When first access terminal from the overlay area of first radio node when move the overlay area of second radio node, keep first Traffic Channel.Individual being grouped between second radio node and first radio network controller propagated more than second, and not by another radio network controller.

Any one other examples of described aspect can provide the one or more of following feature.Can between second radio node and second radio network controller, set up main related.Can between second radio node and first radio network controller, set up time association.Setting up main association can comprise: transmit PN skew and IP address information from second radio node to second radio network controller, setting up time association can comprise: transmit PN skew and IP address information from second radio node to first radio network controller.First radio node can be broadcasted first subnet identifier.Second radio node can be broadcasted second subnet identifier different with first subnet identifier.Each radio node can be disposed its subnet identifier separately independently.Described radio node all can---it has set up main related with described radio network controller---obtain its subnet identifier from its radio network controller separately.

First access terminal can be monitored subnet identifier in resting state, and trigger when the change that detects in subnet identifier that new session is set up or the RNC of dormancy from first radio network controller to second radio network controller switching.First access terminal can by send that the UATI request message triggers that new session is set up or the RNC of dormancy from first radio network controller to second radio network controller switching.

Can between the 3rd radio node and first radio network controller, set up main related.Can between the 3rd radio node and second radio network controller, set up time association.The 3rd radio node can be broadcasted the 3rd subnet identifier, and described the 3rd subnet identifier is different with first and second subnet identifiers that are associated with first and second radio nodes.Described first radio network controller can distribute new UATI to first access terminal when it is in the resting state in the overlay area from first radio node after move the overlay area of the 3rd radio node.The RNC resource control proxy can be used to store the session information of the session of being served by one or more radio network controllers.The RNC resource control proxy can detect the fault of radio network controller, and after detecting the fault of radio network controller, redistribute user conversation to remaining radio network controller, and transmit described session information to these remaining radio network controllers.Can the translator unit session information, it provides enough information about first access terminal to new radio network controller, to send the message of end session.

Can use hardware platform to realize each radio network controller based on frame with a plurality of server cards.Can between second radio node and first radio network controller, set up related by one of resident service device card on first radio network controller.Can between second radio node and second radio network controller, set up related by one of resident service device card on second radio network controller.Can be at each radio node and server card signaling between---described radio node resides on this server card in the radio network controller---set up transport layer and connect, such as TCP or SCTP.Set up related can comprise from second radio node to its resident server card transmit the PN offset information.Described PN offset information can be distributed to from the server card that receives the PN offset information based on other server cards the hardware platform of frame.Handover procedure between the described RNC can meet the A13 interface of 1xEV-DO IOS standard.

Can come in first and second radio nodes, to send the access channel grouping according to the Session ID that is associated with first and second access terminal.The described Session ID that is associated with first access terminal can be based on the access terminal identifier (ATI) according to the 1xEV-DO standard.The Session ID that is associated with described second access terminal can be based on the temporary transient mobile subscriber identifier (TMSI) according to the CDMA2000 standard.Described radio network controller can comprise the PDSN function.When the first transmission terminal is in the resting state in the overlay area from first radio node after move the overlay area of second radio node, can set up new session for the first mobile access terminal on radio network controller, the dormancy that perhaps can carry out the RNC from first radio network controller to second radio network controller is switched.First radio network controller and first radio node can be positioned at same position.Second radio network controller and second radio node can be positioned at same position.

In one aspect, the invention is characterized in a kind of method that is used for exchanging digital information in wireless network use mobile access terminal.Described method comprises: send grouping via first radio node by first Traffic Channel of between the first mobile access terminal and first radio network controller, setting up, and not by second radio network controller; And, send grouping via second radio node by second Traffic Channel of between the second mobile access terminal and second radio network controller, setting up, and not by first radio network controller.Described method is also when sending first Traffic Channel that maintains when dividing into groups between first access terminal and first radio network controller via second radio node from the reception of first access terminal or to first access terminal.Described method also comprises: send the grouping that receives from first access terminal to external network (for example internet).

Implementation can comprise the one or more of following feature.Described method also can comprise: carry out the effective switching (active handoff) of first Traffic Channel from first radio network controller to second radio network controller near the 3rd radio node the time detecting first access terminal.Described method also can comprise: close first Traffic Channel by first radio network controller near the 3rd radio node the time detecting first access terminal.

Described method also can comprise: set up first session for the 3rd mobile access terminal via first radio node on first radio network controller; Remember the approximate location of the 3rd access terminal according to the location update message that sends by access terminal; Receive the grouping of going to the 3rd access terminal that is in resting state at first radio network controller; Send the message of its paging of request the 3rd access terminal to second radio network controller; And via the 3rd radio node from the described access terminal of the described second radio network controller paging.Described method also comprises: receive traffic channel request message by access channel from the 3rd mobile access terminal at the 3rd radio node; Transmit described traffic channel request message from described the 3rd radio node to described second radio network controller; Execution is from the switching of first radio network controller to first session of second radio network controller; And, after finishing described switching, between second radio network controller and the 3rd access terminal, set up Traffic Channel.

Radio network controller (for example first radio network controller) can comprise a plurality of server cards, and described method also can comprise: be based upon first Traffic Channel between the described radio network controller and the first mobile access terminal at a server card of selecting from a plurality of server cards; Send the address of selected server card to first radio node from described radio network controller; Send the reverse link traffic channel grouping from first radio node to the address of selected server card; Send the address of selected server card to second radio node from first radio network controller; And, send the reverse link traffic channel grouping to the address of selected server card from second radio node.

Described first radio node can be configured to be operated on the first frequency channel, and second radio node can be positioned at same position with first radio node, and is configured to be operated on the second frequency channel.Described method also can comprise: set up first session for the first mobile access terminal via first radio node that is operated on the first frequency channel on first radio network controller; On second radio network controller, set up second session via being operated in second radio node on the second frequency channel for the second mobile access terminal; And, on first radio network controller, set up the 3rd session for the 3rd mobile access terminal via second radio node that operates on the second frequency channel.

Described method also can comprise: be operated in set up between first radio node on the first frequency channel and first radio network controller main related; Be operated in set up between second radio node on the second frequency channel and first radio network controller time related; On first radio network controller, set up first session via first radio node that is operated on the first frequency channel for the first mobile access terminal; And, when access terminal begins to monitor second radio node, transmit described first session to second radio network controller in resting state.

Described method also can comprise: receive connection request from the first mobile access terminal via first radio node that is operated on the first frequency channel on first radio network controller; And, on first radio network controller, set up the 3rd Traffic Channel for first access terminal, wherein, described Traffic Channel flows via being operated in second radio node on the second frequency channel.

Described method also can comprise: set up the 3rd mobile Traffic Channel via being operated in second radio node on the second frequency channel according to the actual loading information that is received from first and second radio nodes by first radio network controller.Described method can also comprise: according to setting up in the estimation of the load on first and second radio nodes via being operated in second radio node on the second frequency channel and the 3rd mobile Traffic Channel.

First and second radio network controllers include a plurality of server cards, and described method can also comprise: handle a plurality of Traffic Channels on first server card in first radio network controller; The overload situations of detection in first server card; Be chosen in the Traffic Channel that provides on first server card to be sent to another server card; And, transmit selected Traffic Channel to another server card in one of described radio network controller, and do not abandon described Traffic Channel.

The selection of the Traffic Channel that is used to transmit can be at least in part based on the quantity of the processing resource of being used by selected Traffic Channel and/or the quality of service requirement of the business on a plurality of Traffic Channels.Determine that the destination server card selected Traffic Channel will be sent to is at least in part based on the load and the availability of other cards in radio network controller.The destination server card can be arranged in the radio network controller identical or different with first server card.

Being arranged in central load tracker outside radio network controller or all radio network controller can provide about the information in the load of the server card of one or more radio network controllers.The central load tracker can be configured to trigger the transmission of the Traffic Channel from first server card to the destination server card.In some implementations, can directly obtain load information from other server cards by server card.

Described method can also comprise: use ip network exchange data packets between first radio network controller and first and second radio nodes.

In yet another aspect, the invention is characterized in a kind of radio access network, be used for and the mobile access terminal wireless communication, described radio access network comprises: a plurality of radio nodes, they use network (for example IP network) and interconnect with a plurality of radio network controllers, wherein, each described radio node can each described radio network controller of addressing, and each described radio network controller can each described radio node of addressing; And the interface that is used for exchange grouping between radio access network and external network.

Implementation can comprise following one or more features.Described a plurality of radio node and radio network controller can be associated with common subnet.Each radio network controller can be configured to keep Traffic Channel, no matter and described Traffic Channel just flows on which radio node.Radio network controller can divide into groups and send grouping from access terminal to keep Traffic Channel by any one next the transmission to access terminal via radio node.Each radio node can be associated with the primary wireless network controller of selecting from a plurality of radio network controllers, and each radio network controller can be enabled to send beep-page message via any radio node to access terminal.

Each radio network controller can comprise a plurality of server cards, and each is connected to network and can be by each radio node addressing.Described radio network controller can be configured to set up the Traffic Channel with access terminal on each of described a plurality of server cards.Described radio network controller also can be configured to provide to one or more radio nodes the address of the server card of having set up Traffic Channel on it.Each radio network controller also can be configured to detect the overload situations on one of its a plurality of server cards, and one or more Traffic Channels of selecting to be handled by the card of overload are to be sent to another card.

Described a plurality of radio node can comprise two radio nodes that the position is identical, and first radio node is configured to be operated on the first frequency channel, and second radio node is configured to be operated on the second frequency channel.

Described interface can be the packet data exchanged node, perhaps can be the part of one of radio network controller.

Implementation can realize the one or more of following advantage.By setting up the main and secondary association between all radio nodes and all radio network controller, radio network controller has when the overlay area of access terminal from a radio node and is used to find when move the overlay area of another radio node and the needed information of communicating by letter with any radio node in the IP backhaul.Even this allows wireless network also can carry out normal soft handover when time in access terminal the move to radio node overlay area of---its main RNC is different with that RNC that is currently serviced in access terminal---.This has been avoided the handover procedure between the more traditional RNC, the handover procedure between the described more traditional RNC by known be error-prone, and introduce the extra stand-by period.A kind of implementation of the present invention provides all above-mentioned advantages.

Description of drawings

Fig. 1-Fig. 4 shows network.

Embodiment

Comprise as above for described those the existing 3G wireless network architecture of IS-856 and adopt fixed relationship between RN and RNC.In other words, all that flow or flow to RN from RN are professional by same RNC.This dormancy that requires complicated hierarchy to handle between RNC is switched, and requires (soft) between frequent and the RNC that tends to postpone to switch.When the dedicated leased-line with point-to-point is used for as Fig. 1 and 2 that graphic backhaul between RN and RNC connects, need be in Circuit-switched voice application at the fixed correlation between RN and the RNC.

In example subsequently, RNC represents directly to be attached to the radio network controller of IP network.Direct attached expression RNC can grouping/receiving IP from other nodes IP network divides into groups to other nodes transmissions IP in IP network, and is not higher than any intermediate treatment of IP layer.RNC can be implemented on the hardware platform based on frame, and described platform can be made of a plurality of server cards.In this case, whole frame can be counted as being directly connected to the RNC of IP network, and independently server card need be operated in the intermediate node (perhaps I/O server card) on the IP layer, and the IP grouping/receiving IP from other nodes IP network divides into groups to send to other nodes in IP network.In substituting implementation, can directly be attached to IP network based on the separate server card in the hardware platform of frame.In this case, described server card can have independent IP address, and therefore they can each be counted as a RNC.RNC also can be implemented on the independent server hardware, such as traditional computer server or blade server (blade server).In this case, described server can be counted as RNC, and has for other RN in radio access network and the visible IP of RNC address.

IP-based radio access network framework with the signaling between the RNC

At first, as shown in Figure 3, consider the same position of one group of RNC60 in data center and situation about linking together via the high-speed local area network (LAN) 62 such as thousand gigabit Ethernet local area network (LAN)s.In this case, RNC is connected to network via LAN interface, and router 64 is provided to the connection of external network.Such configuration can be called as RNC bunch (or pond).(how following declarative description same idea can be extended to the RNC that connects by IP network---such as metropolitan area network---more generally.) past, when the main business type of carrying by wireless network was Circuit-switched voice, it was infeasible using such cluster of ethernet lan.RN can use dedicated leased-line 66 and be connected to router in data center.Suppose that RN and RNC are that IP is addressable.In other words, by any RN of bunch service can the IP level with bunch in any other RNC direct communication.

In such as aforesaid that RNC bunch, importantly avoid in any handoff boundary between the RNC independently, so that whole bunch can be a conduct the big RNC as described bunch.This will eliminate the unnecessary switching that causes owing to moving, and improve scalability and reliability thus widely.

In order to realize this, suppose that in one example IS-856 subnet 70 is defined as RNC bunch the whole area of coverage, rather than the area of coverage of a RNC only.In other words, all RN by described bunch of service belong to same subnet now.For simplified system operation, each RN in subnet with bunch in a RNC be associated (for example leading related).When powering for RN first, set up this association.Below the detailed meanings that this is related will be described.

Route is got in the access channel grouping

Each sector in RN can send to AT by forward business or control channel 72.Similarly, the sector of each in RN can receive from AT by reverse traffic or access channel 74.Use long code mask to separate described access channel and reverse traffic channel by code division multiplexing, and use preamble to separate described control channel and forward traffic channel by time division multiplexing.The Traffic Channel grouping that described preamble is identified as the forward link physical layer packet control channel grouping or is associated with the special MAC index.The MAC index, promptly in a sector, be unique, and when Traffic Channel is set up, distributed by RN and RNC at the integer between 0 and 63.Similarly, growing code mask is access channel grouping or particular traffic channel grouping with the reverse link physical layer packet identification.Long code mask is based on the UATI of the AT that is used for Traffic Channel, and based on the SectorID of the serving sector of access channel.The transmission AT of access channel grouping and the reception AT of control channel grouping in the ATI field of MAC layer head, have been indicated.

Whenever RN receives MAC layer when grouping on one of its access channel, RN to that RN associated in bunch in master's (or acquiescence) RNC transmit described grouping, and even do not see its content.Equally, when receiving the grouping of carrying UATI_Request message from AT, described grouping is received RN and is forwarded to main RNC.In IP grouping (may by with the MAC layer Packet Multiplexing of other AT), wherein IP address in destination equals the IP address of Serving RNC to RN with described MAC layer packet encapsulation.Described IP grouping is sent to the router that compiles in data center by backhaul network, and described router is forwarded to Serving RNC with described grouping by ethernet lan.

All access channel groupings comprise address field, are used for identification and send AT.When sending AT by RNC distribution UATI, described address field comprises that UATI.When transmission AT did not also have UATI, described address field comprised random access terminal identifier (RATI), and it is selected at random by AT.It is UATI or RATI that preceding two bits of described address field are indicated described address.

When (Ethernet) I/O subsystem of RNC when AT receives the UATI_Request message with the address field that comprises RATI or Unidentified UATI, RNC takes on the role of Serving RNC to handle session.If RNC is implemented on the hardware platform based on frame, then it distributes described session to one of its server card.Described AT is assigned to UATI then in certain preset range.Be used for to bunch every other RNC identification service RNC this scope by bunch in all RNC know, but do not known by described AT.If RNC is implemented on the hardware platform based on frame, then belong to the scope of the UATI of specific RNC can be further by segmentation to be identified in the server card in the Serving RNC of handling session.Described Serving RNC is also set up with the A10 of PDSN and is connected, so that convenient data transmission between AT and PDSN.Described A10 is connected the server card terminating of handling described session.

When dormancy, RouteUpdate (routing update) message that the AT transmission needs is to provide the information about its current location.This mobile message is stored in the mobility manager in the Serving RNC.Because subnet covers RNC bunch the whole area of coverage, therefore when AT by the time with the border between two RNC in the cluster, AT does not detect subnet to be changed, and does not therefore start the dormancy switching.But, when AT to bunch in the RN that is associated of different RNCs (acting on behalf of RNC) when sending access channel message, by RN to acting on behalf of the grouping that RNC sends that message of carrying.I/O subsystem in acting on behalf of RNC is checked the address field of the access channel grouping of all arrival, and reads UATI.From described UATI, described I/O subsystem is checked the identity of determining Serving RNC by table, and transmits described access channel grouping by high-speed local area network to that RNC.When the UATI in the access channel grouping is received the RNC service, the described grouping of its local processing.Be implemented on the hardware platform based on frame if receive RNC, then its I/O subsystem at first determines handling the server module (card) of described UATI (session), and the internal bus that uses Serving RNC is to the described grouping of that card forwarding.

Route is got in paging

If receive grouped data, then transmit described grouping to the particular server card on Serving RNC by the A10 interface from the PDSN of dormancy AT.That server card is checked the positional information of that AT then.Serving RNC sends beep-page message via the one group of RN that determines according to the last routing update message that receives from AT then.Described beep-page message is sent out via the control channel that belongs to one or more sectors of RNC bunch.The RN that sends beep-page message may not be associated with Serving RNC (being that they may have different main RNC), but they need with bunch in one of RNC be associated.

Connecting (Traffic Channel) sets up

When Serving RNC from AT directly or when acting on behalf of RNC and receive ConnectionRequest (connection request) message, it checks the pilot frequency intensity by the AT report in following the RouteUpdate message of described ConnectionRequest message.For the simplified system operation, suppose the Radio Resource of managing described RN by the Radio Resource controlled function among the RNC that is associated with at each RN.And, the RNC exchange of signaling that RN can only be associated with it.Therefore, when Serving RNC will be set up the Traffic Channel that relates to the RN that is associated with other RNC, Serving RNC at first with Radio Resource controlled function direct communication on those RNC to check Resource Availability.Such communication occurs on the high-speed lan.(Serving RNC can use look-up table to determine the main RNC of RN).In the time can obtaining enough Radio Resources, the RNC that Serving RNC is associated with via these RN to set up necessary Traffic Channel communication link with RN, and sets up to start Traffic Channel to described AT transmission TrafficChannelAssignment (traffic channel assignments) message.In case set up Traffic Channel, then grouping is directly flowed between RN and Serving RNC, inserts and need not anyly act on behalf of RNC.The route of directly getting is like this eliminated the delay that takes place usually in relating to the soft handover rules of getting route by the triangle of another RNC.

When new Traffic Channel relates to RN in the coverage outside of RNC bunch (different sub-network), realize similar rules.In this case, Serving RNC is communicated by letter with the RNC of described bunch of outside to obtain Radio Resource by IP network (metropolitan area network).If can obtain Radio Resource, then Serving RNC is set up communication link with that RN by the RNC exchange of signaling that is associated with via these RN.

This method allows Serving RNC to keep Traffic Channel, though when AT when move the overlay area of the RN that is associated with the RNC different with Serving RNC, also be like this.

The improved IP-based wireless network architecture that does not have the signaling between the RNC

Described so far scheme can improve aspect several.At first, can get routing function and eliminate via the triangle of the access channel grouping of acting on behalf of RNC and get route by move that to RN.This will reduce in the grouping of processing access channel, such as the delay during Traffic Channel foundation, and its cost is some increases on the processing power of RN.And, can eliminate all signalings between RNC, rather than allow RNC directly with all RN exchange of signaling in radio access network.This helps to set up the simpler network architecture, its easier deployment and maintenance.

Described Radio Resource controlled function also can move to RN from RNC, further reduces thus in Traffic Channel and sets up delay in the process.

Described IP-based radio access network described herein and enhancing version thereof all allow to use the flexibility of IP network and metropolitan area network, and produce the system that more distributes, wherein, AT can keep being attached to its Serving RNC, and with its location independent, except when the distance between AT and Serving RNC when becoming excessive outside.For these abilities are provided, each RN can be associated with a plurality of RNC, might be associated with all RNC in IP-based radio access network, but at this, needn't make one of RNC as main RNC.

Avoid the triangle of access channel grouping to get route

When being powered for the first time, AT is as follows to the IS-856 network registry: AT obtains the IS-856 pilot tone of one of the sector by nearby broadcasting, and and system synchronization.Set up in order to start session, AT sends UATI Request.As preceding, AT uses the ATI at random (RATI) in MAC layer head to send this request.

Described RN checks the address field of described access channel grouping, and discerns the UATI that the originator of described message is not assigned with, and forwards the packet to its main RNC that described RN is associated with.In order to check address field, described RN at first extracts MAC layer encapsulation segmentation from the MAC layer grouping that is received, and forms the encapsulation of MAC layer.Described RN reads in the address field in the MAC layer head then.

After receiving UATI Request, main RNC takes on the role of Serving RNC, and distributes UATI to AT.Main RNC proceeds to remainder, particularly security key exchange and the protocol configuration that session is set up then.(explanation is used to improve availability and the improvement version that these rules of better load balance are provided in more detail below).RNC has realized that also the PPP/CHAP rules are to differentiate AT according to its Network Access Identifier symbol (NAI).Between the actual IMSI of NAI and terminal (international mobile subscriber identity), man-to-man mapping is arranged.This mapping is stored in AAA (Radius) the server (not shown).Described aaa server is sent to Serving RNC with the IMSI value of AT.

The Packet Control Function that works in Serving RNC (PCF) uses this IMSI value to select as at the PDSN described in the IS-2001 standard, and the A10 that is established to that PDSN connects.In the A11 registration message, the PCF function provides the IMSI value of AT and the SID/NIS/PZID identifier of itself to PDSN.Described AT and PDSN set up ppp link then, carry out simple IP or mobile IP and set up, and carry out user class and differentiate.

Each RN preserves the routing table that is used for the mapping between UATI and Serving RNC.This routing table can be provided to RN by network management system.As in previous system, each RNC has the UATI value that falls in the particular range.Whenever RN receives access channel when grouping, RN is from the identity of the definite Serving RNC of the UATI value MAC layer head, and places the destination address field of IP head and grouping got be routed to that RNC by the IP address with Serving RNC.Therefore, the access channel grouping directly is provided to Serving RNC by any RN.The scope of the UATI value that each RNC has can directly be sent to RN by RNC, eliminates thus clearly from management system necessity to RN configuration UATI scope.

Said method requires described RN to preserve the form that is used for UATI is mapped to the IP address of RNC.Perhaps, can between all RNC, divide the UATI space, and each RNC is assigned with unique subspace, and can between the IP address of RNC and UATI subspace, sets up arithmetic relation.Described RN can be then determines the IP address of RNC from the UATI of AT with arithmetic mode, and does not use any form.

Also may have hybrid plan, wherein, in RN, handle the access channel grouping with distribution mode and get route in the central member neutralization.At this, central UATI server---may be arranged in one of RNC---can be responsible for distributing UATI and the new session that is associated to Serving RNC.When setting up new session first, RNC can be to the new UATI of central UATI server requests.Serving RNC also can be to the central AC router registration of setting up binding between UATI and Serving RNC.When RN served AT for the first time, it can forward the packet to the UATI router, and described UATI router can be forwarded to the UATI router subsequently.Serving RNC can be carried out Binding Update with Serving RNC then, so that in all transaction subsequently, the access channel grouping can directly be sent to Serving RNC, thereby avoids triangle to get route.

Avoid the switching between RNC

As preceding, come the mobile management of the given AT of disposed of in its entirety by Serving RNC.AT is configured to provide in park mode the position based on distance to upgrade.In other words, when the sector of serving sector and its last RouteUpdate of transmission message surpassed specific range apart, AT sent new RouteUpdate message by access channel to described serving sector.Described RouteUpdate message is forwarded to Serving RNC by RN, and therefore described Serving RNC remembers the position of AT.

When Serving RNC was wanted paging AT, Serving RNC was at first according to determining that in time and position shown in the up-to-date RouteUpdate message that receives from AT it will send one or more RN of paging.In this supposition, Serving RNC is known the IP address of all RN in radio access network.During initial power supply, RNC can obtain this information from network management system, perhaps can directly obtain this information from RN when RN is associated with RNC.Serving RNC directly sends described beep-page message to the group of suitable RN.These RN come paging AT by their control channels separately then.

Their SectorID (, sector ID) and subnet mask broadcasted in all sectors in the IS-856 network on their overhead channel.For less network, can subnet mask be set to 0, hint that thus whole network is a big subnet.In this case, AT never detects the subnet variation.Therefore, AT still is attached to original service RNC, and does not trigger the switching between RNC of dormancy.Connect to the A10 of PDSN also still fixing, and with the location independent of AT.

If radio access network covers geographic big zone, then move to when Serving RNC is too far away as AT, described radio access network is the switching between RNC of forced dormancy modestly.This can for example be triggered by Serving RNC when receiving RouteUpdate message from AT.Perhaps, subnet mask can be chosen as greater than 0, between RNC too far away, to introduce sub-net boundary.Then, when AT passes through sub-net boundary, dormancy taking place switch, and redistributes the A10 connection.And, distribute AT to new UATI, and transmit session parameter to new Serving RNC from old Serving RNC.

Use the Traffic Channel faster of distributed wireless resource control to set up

The following describes and between RN mobile wireless resource control and all RNC radio access network and RN, set up direct signaling link from RNC and how to shorten the settling time that (in the scheme formerly) relates to the Traffic Channel of a plurality of RNC.Whenever AT sends ConnectionRequest (connection request) message when starting new Traffic Channel by access channel with RouteUpdate message, described message is forwarded to Serving RNC from receiving RN immediately.Serving RNC checks that described RouteUpdate message is to determine to be included in one group of possible sector in the active set.Serving RNC is therefore directly corresponding to the resident RN in these sectors, with requested service channel and backhaul resources.RN or refusal or acceptance and distribute needed Radio Resource.If can obtain resource from one group of enough RN, the Serving RNC channel request of accepting business then, and send TrafficChannel (Traffic Channel) assignment messages to AT by control channel.AT begins to go up transmission at reverse traffic channel (RTC) then.In case RN has obtained RTC, then send RTCAck message obtaining with the indication rtc signal to AT.AT is then with TrafficChannelComplete (Traffic Channel is finished) message response, with finishing that the indicating services channel is set up.

In these rules, each RN is at the Radio Resource of controlling itself in the management of hardware resource that can obtain on the RN and the interference on its sector.As a result, between RN and Serving RNC, divide the permission controlled function.RN provides this locality of the sector of their control to allow control, and Serving RNC provides the permission control of the overall situation.Similarly, when the sector in given Traffic Channel in certain during inertia period, described sector can start and be used to close the rules of Traffic Channel to close Traffic Channel by send request to Serving RNC.Serving RNC carries out the overall situation then and determines whether to remove that sector from Traffic Channel, closes the whole service channel, does not perhaps do anything.

In case set up Traffic Channel between AT and Serving RNC, then it keeps anchoring to Serving RNC, moves in the overlay area of other RN in IP-based radio access network even work as AT.

Subregion between RN and RNC is got route---and more detailed

When the sector in RN receives MAC layer when grouping on reverse traffic channel, described sector forwards the packet to input/output cards comprise the flow identifier of connection identifier (CID in interpolation after.Described input/output cards uses described connection identifier (CID value to search the IP address of Serving RNC.Described input/output cards is set to the grouping of encapsulation MAC layer and its flow identifier in the IP grouping of IP address of Serving RNC at its destination-address then.If Serving RNC is implemented on the hardware platform based on frame, then the input/output module in Serving RNC reads the UATI value to determine to handle the server module of this session after receiving grouping.Described input/output cards is sent to that server module to be further processed with described grouping with described flow identifier then.

When the sector in RN receives the grouping of MAC layer on access channel, UATI is at first read in described sector in the ATI field of MAC layer head, be forwarded to input/output cards then after interpolation comprises the SectorID of the flow identifier of the UATI that sends AT and serving sector.Described input/output cards in RN uses described UATI value to search the IP address of Serving RNC again.Described input/output cards is encapsulated in its destination-address with MAC layer grouping with its flow identifier and is set in the IP grouping of IP address of Serving RNC.If realize described RNC on based on the hardware platform of frame, then the input/output module in Serving RNC reads the UATI value to determine the server module of this session of service after receiving grouping.Described input/output cards is sent to that server module to be further processed with described MAC layer grouping with flow identifier then.

When Serving RNC has MAC layer when grouping that is ready to send on forward traffic channel, it at first searches the IP address of the RN that grouping will be sent to.It is encapsulated in its destination-address with MAC layer grouping with its flow identifier then and is set in the IP grouping of IP address of described RN.The SectorID value that described RN reads in after receiving grouping in the flow identifier will send the sector of dividing into groups with definite.Described RN is sent to suitable nextport modem card NextPort with described MAC layer grouping with flow identifier then, and described nextport modem card NextPort uses the MAC index to be used as preamble and dispatch the grouping of MAC layer to transmit on forward link.

Similarly, on forward link, when Serving RNC had the MAC layer grouping that sends on the control channel that is ready in particular sector, Serving RNC was determined the IP address of the RN that grouping will be sent to.It is encapsulated in its destination-address with MAC layer grouping with its flow identifier then and is set in the IP grouping of IP address of described RN.Described RN reads in the SectorID value in the flow identifier after receiving grouping, to determine to send the sector of grouping.RN transmits MAC layer grouping and SectorID and MAC index to suitable nextport modem card NextPort then.Described nextport modem card NextPort scheduling grouping is to transmit on control channel.

Fault recovery and load balance

Aforesaid improved IP-based radio access network framework can be further extended to improve the global reliability of wireless network.

The fault recovery that does not have session to keep

At first, consider each RN when being powered at first with main RNC resource control proxy---it can reside among one or more RNC or can reside in independently computing engines or server on---means of communicating by letter.Described primary resource control agent is distributed to main RNC with each RN.Described RN please ask for all new sessions then and be routed to main RNC.

When RNC owing to certain fault becomes when being unreachable to fully, all AT that served by that RNC IS-856 session that will finally identify them is lost.Each AT among these AT will start new session by send UATI_Request on access channel.Each RN that receives one of these requests gets them and is routed to its main RNC.If RN can not reach its main RNC at any time, the RN main RNC that will please look for novelty from main RNC resource control proxy immediately then.If main RNC resource control proxy also is unreachable to, then RN will send similarly request to inferior RNC resource control proxy.In case UATI_Request is received by main RNC, then main RNC will set up new IS-856 session immediately with AT, and will further start the rules that foundation is connected with the new A10 of PDSN.

The distribution of new main RNC also can be started by the RNC resource control proxy.This can finish by the health that makes the RNC resource control proxy monitor all RNC in subnet continuously, and when detecting the fault of RNC, the RNC resource control proxy is communicated by letter with the RN that all are affected immediately, and they are assigned to new main RNC.Distributing among the RN to main RNC, described RNC resource control proxy can be carried out load balance to guarantee that user conversation is distributed on all available RNC equably.

The load balance session distributes

Said method can be by making the RNC resource control proxy be responsible at last being further strengthened to the session of RNC distributing user.In this case, as master's (or acquiescence) RNC or when may RN itself receiving new UATI_Request, main RNC (perhaps RN) please distribute described session to RNC by the RNC resource control proxy.Described RNC resource control proxy comes to the RNC assign sessions according to Resource Availability, load with at RNC and the distance that is currently serviced between the RN of AT.These means provide the better load balance between RNC, allow user conversation more dynamically to be distributed on the RNC, also consider the current location of AT simultaneously.Under the situation of RNC fault, all new session requests will arrive the RNC resource control proxy, and described RNC resource control proxy will distribute these sessions according to load and other considerations to new RNC then once more.

The RNC resource control proxy also can be used to trigger dormancy and switch to be used for load balance or other purposes.In stage 1IS-856 network, always when detecting the subnet variation, trigger the switching between RNC of dormancy by AT.As mentioned above, the dormancy switching that lacks immediately may cause losing paging data.

In the improved IS-856 network shown in Fig. 3 and 4, position by network based AT starts the dormancy switching, when receiving RouteUpdate, determine the desired user session to the transmission of another RNC when (being used for load balance or other reasons) when Serving RNC, Serving RNC is to the RNC resource control proxy---it is to new RNC assign sessions---sends the dormancy handoff request.Described new Serving RNC distributes new UATI then, and carries out from the session of previous Serving RNC and transmit.

In the implementation that more distributes of RNC resource control proxy thought, RNC can always communicate by letter with other RNC with RN, so that routing iinformation (comprising their load) to be provided to all RN, make RN the conversation request that enters can be got thus and be routed to correct RNC, and not by the RNC resource control proxy.For example, each RN can have preferred RNC tabulation, and whenever it need be when RNC distributes new session, it is chosen in one of RNC in this tabulation according to certain algorithm (pseudorandom selection, circulation etc.), if the RNC in preferred tabulation will become unavailable, then RN will detect this (can use KeepAlive message to detect the RNC fault to help RNC) between RN and RNC, and remove that RNC from its preference lists.The shortcoming of these means is in return such dynamic load result of information and set up some backhaul signaling business.

Has the fault recovery that session keeps

In some networks, may under the situation of RNC fault, recover user session information.It is crowded by the airlink that hundreds of new session request produces that this will eliminate after RNC fault short time, for preserving sessions under the situation of RNC fault, the copy of such information (being used for all sessions at subnet) can be stored in the RNC resource control proxy.

When RNC fault and AT startup new session, its new conversation request will arrive the RNC resource control proxy.Described RNC resource control proxy not only distributes new Serving RNC to each session then, and session information is provided, and avoids long session to set up rules thus.In case successfully distribute new UATI, then can recover and the communicating by letter of network to AT.The RNC resource control proxy further provides the information that is associated with the A10 interface, so that make RNC and same PDSN set up the A10 session, avoids setting up new PPP and mobile/simple IP session thus.

In the RNC based on frame, the RNC resource control proxy may operate on the specific redundant card, and has hot standby.The RNC resource control proxy is responsible for store session information then.If the server module fault, then described session is re-assigned to another server module by inside.On the principle, the operation of this system is identical with the system that moves on network.And, in this case, needn't rebulid the A10 session of PDSN, because can keep the outside ip address of the PCF that sees by PDSN.

Integrated RNC and PDSN

Another benefit of aforesaid IP-based radio access network framework is to make up RNC and PDSN function in the single network element.In the 3G of layering packet data network, PDSN is illustrated in the peak in the layering, therefore can support a plurality of RNC.Hundreds of user and several RNC are supported in the PDSN expection of a new generation.

Between RN and RNC, have in the existing radio access network of link of special-purpose point-to-point, the PDSN function is moved to RNC will not expected, because the quantity that this will reduce the session that can support causes the high switching of frequent cost between the PDSN that relates to new PPP and simple/mobile IP registration.

In IP-based radio access network framework described herein, less occur in the switching between the RNC, therefore allow the PDSN function is integrated among the RNC.Because can be always by effective call of same RNC service, therefore usually in the switching that does not require during the effective call between PDSN.Such means have also been simplified the networking between RNC and PDSN, and have further improved scalability and reliability.

In the RNC with integrated PDSN, the PDSN function comprises PPP termination, simple IP and/or mobile IP external agent and AAA client's function.As long as AT remains in the subnet (such as RNC bunch), then do not need the switching between the PDSN.

If integrated RNC/PDSN fault then supports all sessions (comprising interface, PPP and simple/mobile IP session) of AT to be sent to another RNC/PDSN, avoid any new session between AT and wireless network to set up thus.

Also may RNC/PDSN and RN is integrated.In this case, the RNC/PDSN function can with RN at same position, or even in same shell.

Should be understood that in the method described in the disclosure and can be applied to wherein RNC and PDSN or RN, RNC and PDSN is integrated or at the network of same position with being equal to.

IP-based radio access network framework with master/time RNC association

Each RN have RN association (for example set up main related) in master's (for example acquiescence) RNC, as mentioned above.Use backhaul network 80, each RN also can be associated with one or more other RNC in IP RAN, and these RNC are called as the inferior RNC (for example setting up time association) of that RN.In order to be associated with RNC, RN provides enough information about itself to inferior RNC, so that these RNC can communicate by letter with AT via that RN.And, in order to be supported in the signaling exchange between RN and the inferior RNC, between them, set up signaling and connect.RNC also distinguishes main RN and time RN.Main RN has main those related RN with that RNC.For example when RN powers up, can carry out time related foundation.

When RN receives access channel when grouping from AT, RN is forwarded to its main RNC blindly.Dormancy AT in the overlay area of RN is by the main RNC service of that RN.In a kind of basic implementation, all RN that share same main RNC belong to same 1xEV-DO subnet.When AT passed through sub-net boundary, AT sent the UATI request to its service RN, and described service RN is forwarded to described request its main RNC then.Because this UATI is not served by that RNC, so that RNC starts according to the A13 interface that defines in 1xEV-DO IOS and the common rules of switching between RNC of the dormancy of old Serving RNC.New RNC also carries out A10 and switches.In a word, this method is not retained in the dormancy handoff boundary between the RNC.

Also may allow the RN that belongs to different 1xEV-DO subnets to share same main RNC.In this case, when AT sent the UATI request by sub-net boundary the time, described message was forwarded to the current same main RNC (because same RNC is the main RNC of the RN in two subnets) that is serving AT.Discern it and can proceed to the UATI distribution then, and do not use A13 rules or A10 to switch at the described main RNC of this UATI of service.

When the A10 of main RNC by dormancy AT received the data of input, main RNC proceeded to paging procedure as usually.Via this RNC is sent described beep-page message again as all RN or its subnet of main RNC.

When the AT that sets up Traffic Channel from request when Serving RNC received traffic channel request message, Serving RNC was at first checked routing update message, to determine needed pilot tone and the RN that finds these pilot tones to be positioned at.Serving RNC is got in touch these RN then as usually, to set up Traffic Channel.Master/time association makes the PN skew of the pilot tone that RNC can be asked to the IP of RN map addresses, and uses to be connected with signaling that these RN set up in advance and set up all hand-over branch (handoff leg).In case set up effective Traffic Channel, then Serving RNC keeps grappling as the RNC of that Traffic Channel.When AT moved through the overlay area, Serving RNC used the inferior association of RN to increase or removes RN.

For example, when AT at first communicated by letter with a RN, that RN was forwarded to request its main RNC (promptly a RN has main related RNC with it) as mentioned above.In case set up Traffic Channel, then when AT from the overlay area of a RN when move the overlay area of the 2nd RN, main RNC keeps the Serving RNC of that whole service channel, even that the 2nd RN is main related with Serving RNC.This allows to continue not interrupt user behavior (for example call, data transmit).When AT from the overlay area of a RN when move the overlay area of the 2nd RN, AT comes to transmit to Serving RNC the pilot strength information of the 2nd RN by sending RouteUpdate message.In the common soft handover between the RN with identical main RNC, this transmission when still using a RN, AT takes place.When receiving RouteUpdate message, because time association of being set up, Serving RNC can be communicated by letter with the 2nd RN, and described association comprises the information such as the IP address of the PN skew of pilot signal and RN as mentioned above, get in touch the 2nd RN with the permission Serving RNC, and set up communication channel.An attracting aspect of above-mentioned handover procedure is that it is worked as common soft handover.Unique difference is time association between RN and RNC, and it allows RNC and RN, and---RNC and described RN are main related---sets up Traffic Channel.

Because RN always to their their access channel grouping of main RNC forwarding, therefore no longer needs RN to carry out the access channel grouping according to UATI and gets route.This has simplified the implementation of IP-based radio access network widely.

System based on frame

Aforesaid thought also can be for example be used for system based on frame by following manner: but regard each server card the RNC of IP addressing as, but perhaps each nextport modem card NextPort is regarded as the PN of IP addressing.The logical operation of system does not change.

But, in having the macroreticular of a plurality of server cards, regard each server card independently that RNC may cause too many RNC as, this can produce then, and a plurality of signalings connect and RN arrives the related of RNC.But a kind of mode that is used for hiding this complexity is whole frame to be regarded as the RNC of IP addressing, and uses internal agreement to handle communication in the frame.Again, can use aforesaid thought in an identical manner, and when the logical operation of RNC when the outside is seen and RN be constant.Below explanation described these thoughts in more detail and how to have influenced built-in function based on the RNC of frame.

In some above-mentioned examples, when RN is associated with its master or acquiescence RNC, between RN and RNC, sets up signaling and connect.In the system based on frame, one of server card can be responsible for carrying out described association, and the terminating signaling connects.This expression: when new RN will be associated with RNC, RN by internal distribution to one of (residing in) server card, subsequently, in all signalings of carrying out via that server card between RNC and RN.In IP-based radio access network framework with the signaling between the RNC, can use between the RNC layout manager to find other RNC based on the RNC of frame, comprise the UATI space that PN is offset and their are controlled that these RN provide, layout manager can reside in system controller (SC) card between the described RNC.System controller card is communicated by letter with described server card to understand necessary information about RN to be sent to other RNC.

Use therein in some implementations based on the RNC of frame, when RN when transmitting the AC grouping that is received based on the RNC of frame, described grouping at first is transfused to/the output card intercepting, input/output cards is checked the UATI address in the AC grouping, determine the server card of that UATI of service, and be forwarded to that server card.When local service UATI, input/output cards is determined the particular server card of service UATI, and forwards the packet to that server card.In order to carry out such forwarding, input/output cards is preserved form, and described form arrives RNC with the UATI map addresses, and further local UATI map addresses is arrived server card.

When based on the server card among the RNC of frame when AT receives the request of setting up for Traffic Channel, server card at first is mapped to the IP address of RN and determines that from RouteUpdate message its pilot tone need be used for the RN collection of active set by the PN skew that will be received.Described server card then with those RN exchange of signaling directly that resides on the described server card, to set up needed Traffic Channel branch.For other RN that reside on the same RNC frame, if present, then described server card is at first determined a plurality of server cards that those RN are resided in.Described server contact is shared these server cards of same shell, and they get in touch RN then to set up Traffic Channel branch.For other RN that reside on other RNC frames, described server card is got in touch these RNC.Input/output cards in these RNC is got described request then and is routed to the server card that RN resides in.These server cards are got in touch RN then to set up needed Traffic Channel branch.

Because the direct IP communication between all RN in IP RAN and the RNC is possible, so all Traffic Channel branches directly operate between RN and the Serving RNC.When the input/output cards based on the RNC of frame received the Traffic Channel grouping, according to unique connection identifier (CID, input/output cards was forwarded to the server card of the channel of wherein managing business.

In some implementations, each server card can be assigned with the IP address, and it can provide this address to the RN of positive service business channel.RN can directly send the Traffic Channel grouping to Serving RNC then.Described grouping is got via input/output cards then and is routed to described server card, and does not require based on the high level of connection identifier (CID and search.

Can keep and the communicating by letter of AT based on the RNC of frame, even be in the coverage of RN as described AT, for described RN, it is not main RNC.All customer services directly flow between RN and Serving RNC, when dormancy AT passes through entire I P RAN, do not need the switching (though being possible) between the RNC, because Serving RNC can come paging AT via any RN in IP VAN.

In IP-based radio access network framework, as mentioned above, detection (discovery) is arranged between RNC and communicate by letter via system control card with the signaling between the RNC.This framework also can produce the triangle route of access channel grouping when main RNC is not Serving RNC, and described grouping is got route via another input/output cards based on the RNC of frame.And the fault of RNC server card causes the fault of resident all RN thereon.If whole RNC frame fault, then all main RN lose.

In the improved IP-based radio access network framework that does not have the signaling between the RNC, RN is associated with a plurality of RNC in IP RAN, and preserves and be used for the form of UATI map addresses to Serving RNC.In this means, RN can be configured with subnet information, and in having the additive method of main RNC, this information can be provided by main RNC.RN also keeps being connected with the signaling of a plurality of RNC in IP RAN.All signalings stop in based on one of server card on the RNC of frame now, and one of described server card is assigned to resident that RN.RN to it resident server card information about itself is provided, comprise its IP address.This server card is then to based on the every other server card distributing information among the RNC of frame.

In these examples, when RN receives access channel when grouping from AT, RN checks the UATI address field, determines the IP address of Serving RNC to transmit described grouping to that RNC then from its form.Intercepting described grouping based on the input/output cards among the RNC of frame, is the access channel grouping with described packet identification, checks the UATI address, and the server card that is routed to this AT of processing is got in described grouping.In Traffic Channel was set up, described server card was contacted directly those RN, and they reside on the described server card and set up Traffic Channel branch with request.For other RN, server card is at first determined other server cards that RN is resided in, and gets in touch that other server cards, and described those other server cards are got in touch described RN then to set up Traffic Channel branch.In this means, RNC can be used as the autonomous entity that does not have the communication between the RNC, except the switching of handling between the possible RNC is got the route with optimization.But, exist the communication between the card resident to handle.

Even the triangle of having eliminated between the RNC frame is got route, still, if input/output cards is passed through in all groupings---it is carried out high level and gets routing function, then can have the indirect route of getting in frame inside.The fault of server card causes the fault of resident RN thereon.These RN can no longer serve any session that resides on the RNC, even still those sessions of activity on server card except the server card of fault.But when each server card in frame during as the RNC of IP addressing, such problem does not take place.In this case, grouping is directly got route between RN and RNC server, and the fault of server card does not influence RN or other server cards.

In having the IP-based radio access network framework of master/time association, one group of RNC based on shell is connected to one group of RN via the IP backhaul network, and has the main and secondary association between all RN and all RNC.

Each RN has main RNC based on shell, and RN is associated with it, as mentioned above.Each RN also is associated with other RNC based on shell in IP RAN, and these are called as the inferior RNC of that RN.Described RN provides enough information about itself to inferior RNC, so that these RNC can communicate by letter with AT via that RN.And, in order to be supported in the signaling exchange between RN and the inferior RNC, between RN and next RNC, set up signaling and connect.In each case, handle at RN with based on the association between the RNC of frame via one of server card in the RNC frame.

The access channel grouping that is forwarded to its main RNC by RN blindly is transfused to/the output card intercepting, and described input/output cards is checked the UATI field, and is forwarded to the server card as that UATI of pre-treatment.Dormancy AT in the overlay area of RN is by the server card service in the main RNC of that RN.All RN that share same main RNC belong to same 1xEV-DO subnet.When AT passes through sub-net boundary, AT sends the UATI request to its service RN, described service RN is forwarded to described request its main RNC then, because this UATI can't help that RNC service, therefore described I/O is stuck in and checks after the UATI field any one that described request is forwarded in its server card.Server card can be then starts and the common rules of switching between RNC of the dormancy of old Serving RNC according to the A13 interface of the definition in 1xEV-DO IOS, and described new server card is also carried out A10 and switched.

The RN of the 1xEV-DO subnet that also may allow to belong to different shares same main RNC.In this case, when AT sent the UATI request by sub-net boundary the time, described message was forwarded to the same main RNC (because same RNC is the main RNC of the RN in different sub-network) that is currently serviced in AT.By checking the UATI address, the input/output cards in main RNC can be transmitted described grouping to the server card that is currently serviced in that UATI, and that server card can proceed UATI then and distribute, and does not carry out the A13 rules or A10 switches.

When the A10 of main RNC by dormancy AT received the data of arrival, described grouping was transfused to/the output card intercepting again, is forwarded to the server card of handling that A10 link after described I/O is stuck in and checks.Server card is proceeded paging procedure then as usually.Beep-page message is again via this RNC is sent as all RN or its subnet of main RNC.

When the AT that sets up Traffic Channel from request when server card received traffic channel request message, server card was checked routing update message determining needed pilot tone, and finds current other server cards of handling these pilot tones.Described server card is got in touch these other server card, and it gets in touch RN then to set up Traffic Channel as usually.Main/time related server card that allows is mapped to the identifier of the server card that RN resides in the PN skew of the pilot tone of being asked, and uses the signaling of setting up in advance by these resident RN to connect and set up all hand-over branch.

Above-mentioned explanation can be further extended to improve reliability under the situation of server card fault.In some instances, when the server card fault, also lose by all user conversations of that card service.This expression user can keep in considerable time and can not arrive.The user may not know that he can not arrive yet.For anti-here, when setting up session for the first time, the copy of session status information is stored in the stand-alone card, in system controller card.Session information comprises variety of protocol configuration, mobility information, UATI etc.When session parameter changed, the session information on system controller card was updated.

System controller card use heartbeat signaling mechanism (heartbeat sigaling mechanism) detects the fault of server card, and any one assign sessions in remaining server card.Described new server card can be redistributed UATI, to guarantee described new server card and the connectivity of AT.In this method, only in load balance N+1 redundant configuration, use an extra server card will guarantee to exist enough head rooms (headroom) to redistribute session on the failed server card.

Even some of aforesaid technology are used the 1xEV-DO air-interface standard, described technology can be applicable to other CDMA and non-CDMA air interface technologies with also being equal to.In this case, link layer address (ATI) can be slightly different with the ATI that uses in 1xEV-DO (for example TMSI in CDMA2000), and can use other RN zones such as paging domain, PCF zone etc. to replace the 1xEV-DO subnet.

Controlling based on connection level load balance among the RNC of frame and overload

In RNC,, just then may influence performance by all users of described card service if the load on server card surpasses the processing and the storage capacity of described card based on frame.In order to prevent such overload, can use to connect the level load balance.

For example, when handling and memory uses when becoming too big, server card can be triggered to the active session transmission of one or more connections of one or more other cards that resource wherein can use.In such load balance or overload controlling schemes, be desirably in and have some central entity in the frame, system controller card for example is to remember the independent load of each server card on frame.In some implementations, when server card became overload, server card determined which connection will be sent to another card.At this, server card can use one of several standards, and the QoS that is included in the independent stream in the connection needs, connect the QoS class of always using how many processing and memory resource, user recently etc.In case server card determines it will be sent to which connection of another server card, and then its gets in touch the point-load tracker that is associated with RNC, and request can transmit the destination server card of these connections.

When central load tracking device provides the tabulation of available server card, be similar to the handover procedure between effective RNC as described below, the card of overload is contacted directly one or more available server cards, transmits (perhaps switching) to start active session.

In some implementations, the point-load tracker triggers load balance on one's own initiative.For example, when the point-load tracker detected the server card that RNC balancedly is not installed, point-load was followed the tracks of entity and is sent the identity that active session transmits request and can serve the underload server card of described connection to the Overloaded Servers card.

In some implementations, in IP-based wireless network by bunch in a plurality of RNC carry out load balance.For example, for bunch in all RNC as the load tracking entity at center by remembeing the overall load of independent RNC alternately with the local load tracking device in each RNC.If point-load is followed the tracks of entity detection to the laod unbalance in the RNC of cluster, then its active session of triggering from the RNC of overload to underload RNC transmits.Bunch the center follow the tracks of among one of entity RNC in can residing in bunch, perhaps can bunch in the outside of RNC.

Can be in RNC and/or bunch in realize aforesaid load balance and overload controlling mechanism with distribution mode.For example, replace with bunch point-load that is associated and follow the tracks of an entity, bunch in RNC in local load tracking entity can directly shared each other load information.By this way, when a RNC is experiencing when overload, it can by for example get in touch other local load tracking entities with determine bunch in the availability of other RNC determine bunch in which RNC transmit active session.It can trigger the effective switching to available RNC then.Can use similar strategy to handle load balance in RNC.

When the server card fault, also lost by all connections that server card is being handled, unless other positions in RNC or be useful on certain mechanism of the crucial connection state information of storage in bunch outside.In some implementations, can on the system controller card of RNC, provide connection state information.Therefore, when the server card fault, system controller can be distributed in the Traffic Channel on the failed server card to other server cards in system.The server of charge server card is established to the Traffic Channel branch of all sectors of the described connection of service then, returns to the A10 link of PDSN, and the intiating radio link protocol, recovers the Traffic Channel operation.

Dormancy in the wireless network that part connects is switched

In IP-based wireless network, dormancy AT can be connected to network via a plurality of RNC, and irrelevant with its RN of current service.These RNC form bunch with the RN of their services.When each RN and each RNC have fully when related, such bunch is called as grid RNC bunch.In grid RNC bunch, dormancy AT can always remain to the connectivity of its Serving RNC because Serving RNC can via bunch in RN in any one RN come to communicate by letter with AT.This expression Serving RNC can paging bunch in the AT of any position, and dormancy AT can to bunch in the Serving RNC of any position send access channel message.

When RN not with bunch in each RNC related the time, described bunch be called as that part connects bunch.Part connect bunch in, if the RN of current service AT related with its Serving RNC not, then described AT may lose network and connect.This expression AT may become and can not arrive, and perhaps it may not send the connection of access channel message for example please look for novelty to its Serving RNC.Take place here for anti-, can keep internuncial another RNC to move the session of AT to AT wherein from Serving RNC.

In some implementations, will bunch in RNC and RN be subdivided into a plurality of grids bunch, and set up the 1xEV-DO sub-net boundary belonging between different bunches the RN.Then, whenever dormancy AT by bunch between sub-net boundary the time, its sends the UATI request, the dormancy that triggers between the so-called A13 RNC is switched.The RN that receives UATI request is forwarded to its main RNC (perhaps one of RNC in its bunch) with it, and this RNC determines the RNC of the session of current service AT then from UATI, and will trigger A13 dormancy switching.Bunch between therefore set up subnet and guarantee that dormancy AT always remains connected to network.

When effective AT by bunch between sub-net boundary the time, as long as Serving RNC has necessary association with to the RN distribution service channel in other bunches, then still keep connecting.Otherwise need carry out effective RNC before reaching the border of connection switches.

In some implementations, what part connected bunch is configured to allow AT moves to does not have related RN with the Serving RNC of described AT overlay area, and described Serving RNC can not know that described AT no longer can reach.For example, the current paging domain that is sent the AT that the RouteUpdateRadius of the sector of RouteUpdate determines by wherein said AT at last can comprise with Serving RNC there is not related RN, therefore, when RNC receives the paging data of this AT, it can not directly come paging AT via these RN, in order to handle this problem, RNC preserves the paging domain tabulation that is used for its and keeps each RN of being associated with.RouteUpdateRadius by RN determines described paging domain tabulation.This tabulation not only be included in RNC associated in the IP address of all RN in paging domain, and comprise the IP address of the main RNC of the RN that it is not associated with.When Serving RNC paging receiving data, it directly to it associated in RN send beep-page message, and the paging request of transmitting other RN to their main RNC, their main RNC then in paging domain the RN via them come paging AT.Serving RNC is when it comprises additional information when other RNC transmit beep-page messages, is used to allow other RNC to determine that it need send beep-page message via its which of RN.

In some implementations, Serving RNC is only via those RN---for they it be main RNC---directly send beep-page message, for other RN, it transmits beep-page message to their main RNC, described they main RNC then in paging domain the RN via them come paging AT.

Part connect bunch in, AT can work as it and be in when not having in the overlay area of related RN with Serving RNC to network transmission access channel message.In this case, service RN identify from the UATI field access channel grouping described grouping by with its not related RNC service in be forwarded to its main RNC (perhaps it select other RNC) according to load balancing algorithm.The main RNC of RN will trigger the A13 dormancy and switch before handling the access channel message that is received, wherein, the session of AT will be sent to the main RNC of RN from Serving RNC, and described Serving RNC is taken on the role of source RNC between transfer period, and the main RNC of described RN takes on the role of Target RNC between transfer period.Described Target RNC sends the A13 request message to source RNC then from the IP address that the UATI the access channel grouping that is received draws source RNC.After receiving the session information of AT from source RNC, Target RNC will distribute new UATI to AT, finish A13 and switch, and handle the access channel message that is received then.For example, if access channel message is ConnectionRequest (connection request) message, then Target RNC will be established to the Traffic Channel branch of related RN, and will send traffic channel assignment message.Importantly, in time finish the A13 handover procedure before the timer expiration of Target RNC in AT, to send TCA message.

Also can be used for distributed IP-based wireless network in the method described in this part, wherein, RNC and RN function are arranged in or are integrated in same base station.

Effective switching in the wireless network that part connects

In IP-based radio access network, RNC can be not be associated with all RN in network.Therefore, Serving RNC can not be kept for the Traffic Channel of access terminal (AT) indefinitely.If AT moves in the overlay area with the unconnected RN of Serving RNC, then it will little by little be lost to the wireless connectivity of its Serving RNC.In case lost connection, then AT will attempt to rebulid new connection, start the dormancy handover procedure that aforesaid behavior triggers.A kind of mode that is used to reduce the interruption that causes by lacking association is for Serving RNC, identification AT can be better by with close connection when its sector that is not connected is served so that before AT determines to close connection, prevent possible long duration.Can avoid so-called " RF drags problem " by such behavior in advance that Serving RNC is carried out.

In order to prevent that as above described together connection from losing, can switch to another RNC that is associated with near the AT current location RN from Serving RNC.

When AT from the overlay area of a RN when move the overlay area of another RN, it sends RouteUpdate message to its Serving RNC, Serving RNC uses described message to carry out normal soft handover.By these RouteUpdate message, Serving RNC obtains the relatively accurate estimation of AT position, and can use this information to trigger following effective RNC switching.

Each RNC can be configured to illustrate the form of the main RNC of each resident RN.When RNC determined to trigger effectively switching, it can send HandoffRequest (handoff request) message to the main RNC of service RN, switches to start.Also can in selecting the Target RNC that effectively switches, design other method.

Effective switching implements more complicated than the dormancy switching, because in effectively switching, the effective call state also needs to be sent to Target RNC from source RNC.And, when radio link protocol (RLP) in use the time, become importantly, move RLP from source RNC to Target RNC with the interruption of minimum and handle.Exist and realize the effectively alternative of switching.For example, can before the existing RLP link of losing via old RNC, set up new RLP link via new RNC.This allows AT to receive via source RNC when switching.In case switch and to finish, the RLP link that then arrive source RNC can terminating, and all groupings can be mobile via Target RNC.3GPP2 is that current to be used to discern so effective switching be standardization agreement, with the interoperability between the RNC equipment that enables different manufacturers.

Multichip carrier operation in IP-based network

Another advantage of IP-based radio access network is high power capacity multichip carrier (a plurality of frequency channels) configuration, in legacy system with strict RNC border, increasing new carrier may need to be divided in the RN that carrier #1 is upward served by RNC, so that can be by one group the RN that position identical of same RNC service on carrier wave #2.Coming the identical carrier of service position by same RNC is important requirement in legacy system, can use suitable multichip carrier load balancing algorithm so that guarantee, the multichip carrier load balance is used on available carrier distribution service channel loading equally, so that maximum overall user experience (experience).The working load balance increases the experience of packet data user, and has minimized voice user's blocking probability.As a result, when increasing new carrier, must remove some RN the RN on first carrier, so that be the RN vacating space on second carrier from their Serving RNC.This causes unnecessary service disruption.

In IP-based accessing wirelessly gets up,, therefore needn't remove any one the existing RN on first carrier from their RNC because RNC can keep related with the RN of a big group.On the contrary, can increase by the 2nd RNC, and make all existing RN be associated, still keep simultaneously their related with a RNC with it.This has been avoided any service disruption.When increasing more RN on second carrier, these foundation are related with first and second RNC's.

When session that AT please look for novelty, service RN can be forwarded among described two RNC any one with the session request according to load balance mechanism between a certain RNC, and perhaps, it can be forwarded to described session acquiescence RNC.This RNC will become the Serving RNC of that session subsequently, and just serve described AT as long as AT remains in whole RNC bunch the coverage, and to monitor which carrier irrelevant with AT.And, when Traffic Channel is set up, Serving RNC can to operate in available support any one on one group of RN distribute AT.If RN provides their load information to their all associated RNC, then can realize such traffic channel assignments so that the load of balance by carrier.Therefore because may operate on the same 1xEV-DO subnet, when AT changes the carrier that it is monitoring, do not need the dormancy switching between the RNC at all RN on all carriers.

Perhaps, in IP-based radio access network, operate in RN on first carrier and will use RNC#1 to be used as their main RNC, and the RN that operates on second carrier will use RNC#2 to be used as their main RNC with master/time association.Simultaneously, all RN also have inferior related with other RNC.In this case, when new conversation request arrived first carrier, service RN was forwarded to its main RNC with it, and main RNC becomes Serving RNC then.Perhaps, when new conversation request arrived on second carrier, service RN was forwarded to next RNC with it, and described time RNC becomes Serving RNC.Again, any one RNC can be to the traffic channel assignments AT on any one carrier, so that balance is by the business load of carrier.Again, this needs RN to all RNC---main and secondary both---provides their load information.Unique shortcoming with IP-based radio access network of master/time association is: if AT will change the carrier that it is being monitored, the dormancy that then needs to carry out between the RNC is switched.AT can for example change the carrier that it is being monitored after being redirected (redirect) by its Serving RNC.Being redirected like this can take place, and for example AT is forwarded to the carrier that is equipped with better with service AT.Network at mixed version---one of them carrier is supported so-called 1xEV-DO standard version 0, and second carrier is supported so-called version A---in, described network can be redirected to version A carrier from version 0 carrier with the version party A-subscriber.Being redirected so also can occur on the carrier border, and at this, the coverage of carrier can stop, and perhaps such forwarding also can occur under the situation of RN fault.If AT is lost to the RF link of the given RN on carrier #1, then it can be connected to the identical RN in position on carrier #2.Again, need the dormancy between the RNC to switch the switching of carrying out between such carrier.

The border cell paging

In IP-based wireless network, can reduce handoff boundary widely by forming big bunch.But big bunch formation may not be eliminated switching fully.The known problem of seeing in dormancy is switched is to lose paging data between dormancy transfer period, and in the switching between the RNC of dormancy, AT will once only monitor a sector.AT is the monitor service RNC sector that can not arrive at the beginning, then Serving RNC paging AT no longer just.AT has been sent to after new RNC and PDSN forwarding a packet to new RNC with AT in its session now, obtains paging again.For the paging data that prevents loss, Serving RNC can be in that it sends in the session information of new RNC and comprises any unsettled (outstanding) paging data between A13 dormancy transfer period.Serving RNC can paging AT when finishing A13 dormancy switching.This will guarantee that AT keeps paging in the paging procedure between RNC of dormancy.

A plurality of embodiment of the present invention has been described.But, can understand that can carry out various modifications under the situation that does not break away from the spirit and scope of the present invention, therefore, other embodiment are in the scope of appended claim.

Claims

1. method comprises:

With the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes explicitly,

On described first radio network controller, set up first session via described first radio node for the described first mobile access terminal,

On described second radio network controller, set up second session via described second radio node for the described second mobile access terminal,

Between described first mobile access terminal and described first radio network controller, set up first Traffic Channel,

Send and receive more than first grouping by described first Traffic Channel, described more than first individual being grouped between described first radio node and described first radio network controller are propagated, and by described second radio network controller,

When described first access terminal is kept described first Traffic Channel from the overlay area of described first radio node when move the overlay area of described second radio node, send and receive more than second grouping by described first Traffic Channel, described more than second individual being grouped between described second radio node and described first radio network controller are propagated, and not by described first radio network controller

When described first access terminal is in the resting state in the overlay area from described first radio node after move the overlay area of described second radio node, on described second radio network controller, set up new session, perhaps carry out from described first radio network controller and switch to the dormancy between RNC of described second radio network controller for the described first mobile access terminal.

2. according to the method for claim 1, also comprise:

Between described second radio node and described second radio network controller, set up main association, and between described second radio node and described first radio network controller, set up inferior related.

3. according to the method for claim 2,

Wherein, set up described main association and comprise: transmit PN skew and IP address information from described second radio node to described second radio network controller, and

Wherein, setting up described association comprises: transmit PN skew and IP address information from described second radio node to described first radio network controller.

4. according to the method for claim 1 or 2, also comprise:

Broadcast first subnet identifier by described first radio node,

Broadcast second subnet identifier different by described second radio node with described first subnet identifier,

In resting state, monitor subnet identifier by described first access terminal, and

When the variation that detects in described subnet identifier, trigger that described new session is set up or from of the switching between RNC of described first radio network controller to the dormancy of described second radio network controller.

5. according to the method for claim 4, also comprise:

Use each radio node subnet identifier separately to dispose each radio node independently.

6. according to the method for claim 4, also comprise:

The respective wireless network controller that sets up main association with it from it by the described second or the 3rd radio node obtains its subnet identifier.

7. according to the method for claim 4, wherein,

Triggering comprises: by described first access terminal by sending the UATI request message and trigger that described new session is set up or from of the switching between RNC of described first radio network controller to the dormancy of described second radio network controller.

8. according to the method for claim 7, also comprise:

9. according to the method for claim 7, also comprise:

10. according to the method for claim 4, also comprise:

Between the 3rd radio node and described first radio network controller, set up main association,

Between described the 3rd radio node and described second radio network controller, set up time association,

Broadcast three subnet identifier different with described first and second subnet identifiers by described the 3rd radio node, wherein said first and second subnet identifiers are associated with described first and second radio nodes,

When described first radio network controller from the overlay area of described first radio node to the overlay area of described the 3rd radio node move the back it when being in the resting state, described first radio network controller distributes new UATI to described first access terminal, and

When the change that detects in described subnet identifier, trigger described new UATI distribution by sending the UATI request message.

11. the method according to claim 10 also comprises:

12. the method according to claim 10 also comprises:

13. the method according to claim 2 also comprises,

Use the RNC resource control proxy, be used to store session information by the session of one or more radio network controllers services.

14. the method according to claim 7 also comprises:

Detect the fault of radio network controller by the RNC resource control proxy, and

When detecting the fault of radio network controller, redistribute user conversation to remaining radio network controller, and session information is sent to these remaining radio network controllers.

15. the method according to claim 1 or 2 also comprises:

Use has the hardware platform based on frame of a plurality of server cards and realizes each radio network controller.

16. the method according to claim 15 also comprises:

By one of described server card being resided on described first radio network controller, between described second radio node and described first radio network controller, set up association, and

By one of described server card being resided on described second radio network controller, between described second radio node and described second radio network controller, set up related.

17. according to the method for claim 16, wherein,

The foundation association comprises: from described second radio node to it resident server card transmit the PN skew,

Described method also comprises: from the server card that receives described PN skew to distributing described PN offset information based on other server cards the hardware platform of frame described.

18. the method according to claim 16 also comprises:

In each radio node and described radio network controller its set up the transport layer that is used for signaling between the resident server card and connect.

19. according to the method for claim 18, wherein,

20. according to the process of claim 1 wherein,

Handover procedure between the RNC meets the A13 interface of 1xEV-DO IOS standard.

21. according to the process of claim 1 wherein,

Described radio network controller comprises the PDSN function.

22. according to the process of claim 1 wherein,

Described first radio network controller and described first radio node are positioned at same position, and

Described second radio network controller and described second radio node are positioned at same position.

23. computer program, visibly be included in the information carrier, and be adapted to operate in the mobile wireless network that comprises first and second radio network controllers and first and second radio nodes, described computer program comprises instruction, and it is moved makes data processing equipment:

On described first radio network controller, set up first session via described first radio node for the first mobile access terminal.

On described second radio network controller, set up second session via described second radio node for the second mobile access terminal,

Send and receive more than first grouping by described first Traffic Channel, described more than first individual being grouped between first radio node and described first radio network controller are propagated, and by described second radio network controller,

When described first access terminal is kept described first Traffic Channel from the overlay area of described first radio node when move the overlay area of described second radio node, individual being grouped between described second radio node and described first radio network controller propagated more than second, and not by other radio network controllers.

24. according to the computer program of claim 23, wherein, described instruction is made described data processing equipment by further operation:

25. a mobile wireless network comprises:

First radio network controller,

Second radio network controller,

First radio node,

Second radio node,

The first mobile access terminal, it is associated with first session, described first session is to set up on first radio network controller via described first radio node with first Traffic Channel of described first radio network controller foundation, the described first mobile access terminal sends and receives more than first grouping on described first Traffic Channel, wherein, described more than first individual being grouped between described first radio node and described first radio network controller are propagated, and not by described second radio network controller, and

The second mobile access terminal, it is associated with second session of setting up on described second radio network controller via described second radio node,

Wherein, when described first access terminal is kept described first Traffic Channel from the overlay area of described first radio node when move the overlay area of described second radio node, wherein, individual being grouped between described second radio node and described first radio network controller propagated more than second, and not by described second radio network controller.

26. according to the mobile wireless network of claim 20, wherein,

27. one kind is used for using the mobile access terminal to exchange the method for digital information at wireless network, described method comprises:

Send grouping via first radio node by first Traffic Channel of between the first mobile access terminal and first radio network controller, setting up, and not by second radio network controller;

Send grouping via second radio node by second Traffic Channel of between the second mobile access terminal and described second radio network controller, setting up, and not by described first radio network controller;

When receiving or when described first access terminal sends grouping, maintain described first Traffic Channel between described first access terminal and described first radio network controller from described first access terminal via described second radio node;

Send the grouping that receives from described first access terminal to external network.

28. the method according to claim 27 also comprises:

Carry out of the effective switching of first Traffic Channel near the 3rd radio node the time detecting described first access terminal from described first radio network controller to described second radio network controller.

29. the method according to claim 27 also comprises:

Close described first Traffic Channel by described first radio network controller near the 3rd radio node the time detecting described first access terminal.

30. the method according to claim 27 also comprises:

On described first radio network controller, set up first session via described first radio node for the 3rd mobile access terminal;

Remember the approximate location of described the 3rd access terminal according to the location update message that sends by access terminal;

Receive the grouping of going to described the 3rd access terminal that is in resting state at described first radio network controller;

Send the message of described the 3rd access terminal of its paging of request to described second radio network controller;

Via the 3rd radio node from the described access terminal of the described second radio network controller paging.

31. the method according to claim 30 also comprises:

Receive traffic channel request message by access channel from described the 3rd mobile access terminal at described the 3rd radio node;

Transmit described traffic channel request message from described the 3rd radio node to described second radio network controller;

Execution is from the switching of described first radio network controller to first session of described second radio network controller; And,

After finishing described switching, between described second radio network controller and described the 3rd access terminal, set up Traffic Channel.

32. according to the method for claim 27, wherein, described first radio network controller comprises a plurality of server cards, and described method also comprises:

Be based upon described first Traffic Channel between described radio network controller and the described first mobile access terminal at a server card of from described a plurality of server cards, selecting;

Send the address of selected server card to described first radio node from described radio network controller;

Send the reverse link traffic channel grouping from described first radio node to the address of selected server card;

Send the address of selected server card to described second radio node from described first radio network controller; And,

Send the reverse link traffic channel grouping from described second radio node to the address of selected server card.

33. according to the method for claim 27, wherein, described first radio node is operated on the first frequency channel, and described second radio node and described first radio node are positioned at same position, and is operated on the second frequency channel.

34. the method according to claim 33 also comprises:

Via next first session of on described first radio network controller, setting up of described first radio node that is operated on the described first frequency channel for the described first mobile access terminal;

Via next second session of on described second radio network controller, setting up of described second radio node that is operated on the described second frequency channel for the described second mobile access terminal; And,

On described first radio network controller, set up the 3rd session via operating in described second radio node on the described second frequency channel for the 3rd mobile access terminal.

35. the method according to claim 33 also comprises:

Be operated in set up between described first radio node on the described first frequency channel and described first radio network controller main related;

Be operated in set up between described second radio node on the described second frequency channel and described first radio network controller time related;

Via next first session of on described first radio network controller, setting up of described first radio node that is operated on the described first frequency channel for the described first mobile access terminal; And,

When access terminal begins to monitor described second radio node in resting state, transmit described first session to described second radio network controller.

36. the method according to claim 33 also comprises:

In described first radio network controller, receive connection request via described first radio node that is operated on the described first frequency channel from the described first mobile access terminal; And,

Set up the 3rd Traffic Channel for described first access terminal on described first radio network controller, wherein, described Traffic Channel flows via being operated in described second radio node on the described second frequency channel.

37. the method according to claim 36 also comprises:

Set up the 3rd mobile Traffic Channel according to the actual loading information that receives from described first and second radio nodes by described first radio network controller via being operated in described second radio node on the described second frequency channel.

38. the method according to claim 36 also comprises:

According to setting up in the estimation of the load on described first and second radio nodes via being operated in described second radio node on the described second frequency channel and the 3rd mobile Traffic Channel.

39. according to the method for claim 27, wherein, described first and second radio network controllers include a plurality of server cards, described method also comprises:

In described first radio network controller, handle a plurality of Traffic Channels on first server card;

The overload situations of detection in described first server card;

Be chosen in the Traffic Channel that provides on described first server card to be sent to another server card; And,

Transmit selected Traffic Channel to another server card in one of described radio network controller, and do not abandon described Traffic Channel.

40. according to the method for claim 39, wherein, the selection of the Traffic Channel that is used to transmit is at least in part based on the quantity of the processing resource of being used by selected Traffic Channel.

41. according to the method for claim 39, wherein, the selection of the Traffic Channel that is used to transmit is at least in part based on the quality of service requirement of the business on a plurality of Traffic Channels.

42. the method according to claim 39 also comprises:

Determine that the destination server card selected Traffic Channel will be sent to is at least in part based on the load and the availability of other cards in radio network controller.

43. according to the method for claim 39, wherein, described first server card and destination server card are arranged in and same radio network controller.

44. according to the method for claim 42, wherein, the central load tracker provides the information about the load of server card.

45. according to the method for claim 44, wherein, described central load tracker is arranged in radio network controller.

46. according to the method for claim 44, wherein, described central load tracker is positioned at outside all radio network controllers.

47. according to the method for claim 44, wherein, described central load tracker is configured to trigger the transmission from described first server card to the Traffic Channel of described destination server card.

48., wherein, directly obtain load information from other server cards by the described first server service device card according to the method for claim 41.

49. according to the method for claim 30, wherein, described the 3rd radio node belongs to different subnets with described first radio node.

50. the method according to claim 27 also comprises:

Use ip network exchange data packets between described first radio network controller and described first and second radio nodes.

51. according to the method for claim 27, wherein, described first radio network controller is configured to as the packet data exchanged node.

52. according to the method for claim 27, wherein, described first and second radio network controllers and described first and second radio nodes are positioned at same position.

53. according to the method for claim 27, wherein, described external network comprises ip network.

54. a radio access network is used for and the mobile access terminal wireless communication, described radio access network comprises:

A plurality of radio nodes, their use network and a plurality of radio network controller to interconnect, and wherein, each described radio node can each described radio network controller of addressing, and each described radio network controller can each described radio node of addressing; And

The interface that is used for exchange grouping between described radio access network and external network.

55. according to the radio access network of claim 54, wherein, the described network of interconnect described radio node and radio network controller comprises ip network.

56. according to the radio access network of claim 54, wherein, each radio network controller is configured to keep Traffic Channel, no matter and described Traffic Channel just flows on which radio node.

57. according to the radio access network of claim 56, wherein, described radio network controller divides into groups and sends grouping from described access terminal to keep described Traffic Channel by any one next the transmission to described access terminal via radio node.

58. according to the radio access network of claim 56, wherein, described a plurality of radio nodes and described a plurality of radio network controller are associated with public subnet.

59. according to the radio access network of claim 54, wherein, each radio node is associated with the primary wireless network controller of selecting from described a plurality of radio network controllers.

60. according to the radio access network of claim 54, wherein, each of described a plurality of radio network controllers is enabled to send beep-page message via any radio node to access terminal.

61. according to the radio access network of claim 54, wherein, each radio network controller comprises:

A plurality of server cards, each is connected to network and can be addressed by each radio node, and wherein each radio network controller is configured to set up the Traffic Channel with access terminal on each of described a plurality of server cards.

62. according to the radio access network of claim 61, wherein, described radio network controller is configured to provide to one or more radio nodes the address of the server card of having set up Traffic Channel on it.

63. according to the radio access network of claim 54, wherein, described a plurality of radio nodes comprise:

First radio node, it is configured to operate on the first frequency channel; And

Second radio node, it is configured to operate on the second frequency channel, and wherein, described first and second radio nodes are positioned at same position.

64. radio access network according to claim 61, wherein, each radio network controller is configured to detect the overload situations on one of its a plurality of server cards, and one or more Traffic Channels of selecting to be handled by the card of overload are to be sent to another card.

65. according to the radio access network of claim 54, wherein, described interface comprises the packet data exchanged node.

66. according to the radio access network of claim 54, wherein, described interface is the part of radio network controller.