WO2011100894A1

WO2011100894A1 - Switching method and relay node

Info

Publication number: WO2011100894A1
Application number: PCT/CN2011/071112
Authority: WO
Inventors: 刘菁
Original assignee: 华为技术有限公司
Priority date: 2010-02-21
Filing date: 2011-02-21
Publication date: 2011-08-25
Also published as: CN102164385A; CN102164385B

Abstract

A switching method and a relay node (RN) are disclosed in the embodiment of the present invention. The method includes: an RN receives a switching request from a base station, and said switching request includes the bearing configuration information of the relay link and the Quality of Service (QoS) information corresponding to the object access link; The RN sets up relay link bearing according to said bearing configuration information of the relay link; The RN generates bearing re-configuration information of the object access link according to the QoS information corresponding to said object access link, and sends said bearing re-configuration information of the object access link to user device through said base station. The technical solution of the embodiment of the present invention enables user equipment (UE) switching between RN and base station.

Description

Switching method and relay node

The present application claims priority to Chinese Patent Application No. 201010112219.2, entitled "Switching Method and Relay Node", filed on February 21, 2010, the entire contents of which is incorporated herein by reference. Technical field

The present invention relates to the field of mobile communications, and in particular, to a handover method and a relay node. Background technique

Handover is a key technology in the field of mobile communications and is the basis for future mobile terminals to establish reliable mobile communications between numerous mobile communication systems or mobile cells. The handover can guarantee the quality of service (QoS) of the service when the mobile terminal is in the mobile state, and enables the mobile terminal to maintain its ongoing connection while changing the network access point. Reasons for triggering a switch usually include the cause of the wireless environment and the cause of the business change. Among them, the reasons for the wireless environment include the quality of the wireless link, the strength of the received signal, and the appearance of a better cell. The service causes include service type, traffic, and load control.

In the Long Term Evolution (LTE), the information exchange between the base stations and the target base station is implemented by the user equipment (User Equipment, hereinafter referred to as UE).

Currently, when a type 1 relay node is introduced in LTE, the type 1 RN cannot perform effective handover with the base station to which the RN is attached. Summary of the invention

The embodiment of the invention provides a handover method and a relay node, which are used to implement handover between a relay node and a base station.

An embodiment of the present invention provides a handover method, including:

The relay node RN receives a handover request sent by the base station, where the handover request includes a relay link Carrying configuration information and QoS information corresponding to the target access link;

The RN establishes a relay link bearer according to the bearer configuration information of the relay link;

The RN generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link, and sends the bearer reconfiguration information of the target access link to the user equipment through the base station.

An embodiment of the present invention provides a handover method, including:

The relay node RN sends a handover request to the base station;

The RN receives the bearer reconfiguration information of the target access link sent by the base station; the RN sends the bearer reconfiguration information of the target access link to the user equipment.

An embodiment of the present invention provides a relay node, including:

a first receiving module, configured to receive a handover request sent by the base station, where the handover request includes a relay link bearer configuration information and QoS information corresponding to the target access link;

a first establishing module, configured to establish a relay link bearer according to the bearer configuration information of the relay link, where the first generating module is configured to generate a target access link according to the QoS information corresponding to the target access link Carrying reconfiguration information;

The first sending module is configured to send bearer reconfiguration information of the target access link to the user equipment by using the base station.

An embodiment of the present invention provides a relay node, including:

a second sending module, configured to send a handover request to the base station, and send the bearer reconfiguration information of the target access link to the user equipment;

And a second receiving module, configured to receive bearer reconfiguration information of the target access link sent by the base station.

In the embodiment of the present invention, the RN sends the bearer reconfiguration information of the target access link generated by the base station or the RN to the UE, thereby implementing handover between the RN and the eNB. DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a flowchart of a handover method according to an embodiment of the present invention;

2 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 3 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 4 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 6 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 7 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 8 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 9 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 10 is a flowchart of another handover method according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a relay node according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another relay node according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of another relay node according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of a handover system according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. based on All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of a handover method according to an embodiment of the present invention. As shown in FIG. 1, the method includes:

Step 101: The RN receives a handover request sent by the base station, where the handover request includes the bearer configuration information of the relay link and the QoS information corresponding to the target access link.

In this embodiment, the target access link is a link between the UE and the RN.

Step 102: The RN establishes a relay link bearer according to the bearer configuration information of the relay link.

Step 103: The RN generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link, and sends the bearer reconfiguration information of the target access link to the UE through the base station.

In this embodiment, after receiving the bearer reconfiguration information of the target access link, the UE may complete the establishment of the target access link bearer according to the bearer reconfiguration information of the target access link. In this embodiment, after the UE is handed over from the base station to the RN, the UE can communicate with the network side through the established relay link bearer and the target access link bearer.

In this embodiment, step 103 may also be located before step 102.

In the technical solution of the embodiment, after receiving the handover request sent by the base station, the RN establishes a relay link bearer according to the bearer configuration information of the relay link in the handover request, and generates a target according to the QoS information corresponding to the target access link. The bearer reconfiguration information of the access link, and the bearer reconfiguration information of the target access link is sent to the UE through the base station, so that the UE switches from the base station to the RN.

FIG. 2 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201: The UE reports a measurement report (Measure Report) to the base station.

The UE can report the measurement result of the current cell and the neighboring cell to the base station through the measurement report.

Step 202: The base station performs a handover decision according to the measurement report.

The base station can perform radio resource management according to the measurement report and the neighboring cell (Radio Resource Management, hereinafter referred to as: RRM) information to perform handover decision; or the base station may perform handover decision according to the measurement report, the RRM information corresponding to the neighboring cell, and the channel quality information of the relay link corresponding to the neighboring cell.

In this embodiment, the UE needs to implement handover between the RN and the base station to which the RN is attached. Therefore, using the relay link channel quality information of the neighboring cell to perform handover determination, the handover decision result is more accurate.

The base station determines the target cell from the neighboring cells in the measurement report according to the handover decision information. In this embodiment, the target cell is a cell of the RN, that is, the UE switches from the attached base station to the RN.

Step 203: The base station sends a handover request (blHandoverRequest) to the RN, where the handover request includes bearer configuration information of the relay link and QoS information corresponding to the target access link.

The bearer configuration information of the relay link and the QoS information corresponding to the target access link are allocated by the base station for the services supported by the UE.

The QoS information corresponding to the target access link can be used for determining whether the RN supports the UE service, and performing bearer configuration of the received service on the access link.

The QoS information corresponding to the target access link may include at least one of the following:

Service Class Indicator (QoS Class Indicator, hereinafter referred to as QCI), Allocation Retention Priority (ARP), Maximum Bit Rate (MBR), and Guaranteed Bit Rate ( Guarantee! Bit Rate) The following is abbreviated as: GBR. The Aggregate Maximum Bit Rate (hereinafter referred to as AMBR) corresponding to the service supported by the source cell.

In this embodiment, the QoS information corresponding to the target access link further includes a corresponding packet delay budget (hereinafter referred to as PDB) on the target access link, or the handover request further includes a corresponding link on the relay link. PDB.

The bearer configuration information of the relay link may include: a bearer configuration parameter of the relay link allocated by the base station for the service supported by the UE. Step 204: The RN establishes a relay link bearer according to the bearer configuration information of the relay link.

During the handover preparation process, the RN can establish a trunk link bearer according to the bearer configuration information of the relay link, so that after the handover is completed, the UE can immediately communicate with the network side through the relay link bearer, avoiding long The time delay increases the user experience.

Step 205: The RN generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link.

In this embodiment, when the QoS information corresponding to the target access link includes the corresponding PDB on the target access link, the RN may directly generate the bearer reconfiguration of the target access link according to the QoS information corresponding to the target access link. information.

Or, in this embodiment, when the handover request further includes a corresponding PDB on the relay link, the RN may generate a target access link according to the QoS information corresponding to the target access link and the corresponding PDB on the relay link. Carrying reconfiguration information. Specifically, the RN may learn the corresponding PDB on the source access link according to the QCI in the QoS information corresponding to the target access link, and subtract the corresponding PDB on the source access link from the corresponding PDB on the relay link. Generating a corresponding PDB on the target access link, and generating bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link and the corresponding PDB on the target access link, where the source access chain The path is the link between the UE and the base station.

In this embodiment, the base station performs QoS establishment and maintenance on the services on the two-hop link (including the target access link and the relay link) in a manner of performing centralized control distribution, and the service bearer of the two-hop link The service bearer configuration is different from that of the single-hop link. Therefore, the handover request sent by the base station to the RN in step 203 may carry the QoS information corresponding to the target access link bearer and the bearer configuration information of the relay link, in step 206. The RN generates bearer reconfiguration information of the access link according to the QoS information corresponding to the target access link.

Step 206: The RN sends a handover response message (blHandoverResponse) to the base station.

The information carried by the handover response message may include bearer reconfiguration information of the target access link. In this embodiment, the bearer reconfiguration information of the target access link may be included in the target to the source transparent container in the handover response message. Further, the information carried in the handover response message may further include:

1) E-UTRAN radio access bearer (E-RAB) ID The E-RAB ID is the EPS bearer corresponding to the service received by the target cell.

2) E-RAB Not Admitted List

The E-RAB Not Admitted List is an EPS bearer corresponding to the service rejected by the target cell, and specifically includes an enhanced packet system (EPS) bearer identifier and a reason for denying the EPS bearer access.

Step 207: The base station sends a radio resource control connection reconfiguration message (RRCConnectionReconfiguration) to the UE, where the radio resource control connection reconfiguration message includes bearer reconfiguration information of the target access link.

In this step, the base station transparently transmits the bearer reconfiguration information of the target access link to the UE through the RRC connection reconfiguration message, so that the UE can establish a target according to the bearer reconfiguration information of the target access link and the RN. Access link bearer.

Step 208: The UE randomly accesses the RN.

Step 209: The UE sends a radio resource control connection reconfiguration complete message to the RN.

( RRCConnectionReconfigurationComplete ).

After performing step 208 and step 209, the UE completes the handover.

In this embodiment, step 205 may also be located before step 204.

In the technical solution of the embodiment, the handover request sent by the base station to the RN may carry the bearer configuration information of the relay link and the QoS information corresponding to the target access link bearer. Therefore, during the process of the UE switching from the base station to the RN, The relay link bearer may be established according to the bearer configuration information of the relay link, and the RN needs to generate bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link bearer, thereby ensuring the UE from the base station. The establishment of bearer services in the process of handover to the RN.

An embodiment of the present invention provides a handover method. In this embodiment, a scenario in which a UE is switched from a source RN to a target RN, where the source RN is attached to the source base station, and the target RN is attached to the target base station. FIG. 3 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 3, the method includes: Step 301: The UE reports a measurement report to the source RN.

Step 302: The source RN performs a handover decision according to the measurement report.

Step 303: The source RN sends a handover request to the target RN by using the source base station and the target base station, where the handover request includes bearer configuration information of the relay link and QoS information corresponding to the target access link.

Step 304: The target RN establishes a relay link bearer according to the bearer configuration information of the relay link, and generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link.

Step 305: The target RN sends a handover response message to the source RN through the target base station and the source base station. Specifically, the handover response message may include bearer reconfiguration information of the target access link. Step 306: The source RN sends a radio resource control connection reconfiguration message to the UE, where the radio resource control connection reconfiguration message includes bearer reconfiguration information of the target access link.

The UE may establish an access link bearer and access the target RN according to the bearer reconfiguration information of the target access link and the target RN.

Step 307: The UE detaches from the source RN and synchronizes with the target RN.

Step 308: The source RN sends a sequence number status report to the target RN.

Since there is no direct interface between the source RN and the target RN, the source RN can forward the message or data sent to the target RN through the source base station.

Step 309: The source RN forwards the user plane data to the source base station.

Step 310: The source base station receives the user plane data forwarded by the source RN, and caches the user plane data forwarded by the source RN.

Step 311: The UE randomly accesses the target RN.

Step 312: The source base station forwards user plane data to the target RN.

In this embodiment, step 312 may also be located before step 311.

Step 313: The UE sends a radio resource control connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the target RN.

Thereby the UE completes the handover process from the source RN to the target RN.

Step 314: The target RN sends a handover confirmation message (blHandoverConfirm) to the target eNB. Step 315: The target base station sends a UE context release message to the source base station.

Step 316: The source base station releases the cached user plane data.

Step 317: The source base station sends a UE context release message to the source RN.

Step 318: The source RN releases the resource.

In the technical solution of the embodiment, the source base station caches the user plane data forwarded by the source RN, and further forwards the buffered user plane data to the target through the target base station in the process of the UE switching from the source RN to the target RN. RN. When the UE successfully switches from the source RN to the target RN, the source base station releases the buffered user plane data, so that the source RN needs to return the user plane data through the Un interface when the UE fails to successfully switch to the target RN during the handover process. The problem is that the user plane data is transmitted to the source RN through the source base station, and the user plane data is transmitted twice on the Un interface, thereby saving the air interface resources on the Un interface.

FIG. 4 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 4, the method includes:

Step 401: The RN sends a handover request to the base station.

Step 402: The RN receives bearer reconfiguration information of the target access link sent by the base station.

In this embodiment, the target access link is a link between the UE and the base station.

Step 403: The RN sends bearer reconfiguration information of the target access link to the UE.

In the technical solution of the embodiment, after the RN sends the handover request to the base station, the RN receives the bearer reconfiguration information of the target access link sent by the base station, and sends the bearer reconfiguration information of the target access link to

The UE, thereby causing the UE to handover from the RN to the base station.

FIG. 5 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 5, the method includes:

Step 501: The RN sends a handover request to the base station.

Step 502: The RN receives the bearer reconfiguration information of the target access link sent by the base station, where the bearer reconfiguration information of the target access link is generated by the base station according to the QoS information corresponding to the target access link that is known in advance. In this embodiment, the target access link is a link between the UE and the base station.

Step 503: The RN sends the bearer reconfiguration information of the target access link to the UE.

In the technical solution of the embodiment, after the RN sends the handover request to the base station, the base station generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link that is learned in advance, and uses the RN to connect the target access link. The bearer reconfiguration information of the path is sent to the UE, so that the UE is handed over from the RN to the base station.

FIG. 6 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 6, the method includes:

Step 601: The UE reports a measurement report to the RN.

The UE can report the measurement result of the current cell and the neighboring cell to the RN through the measurement report.

Step 602: The RN sends a handover request (blHandoverRequire) to the base station, where the handover request includes a measurement report.

Step 603: The base station performs a handover decision according to the measurement report.

Specifically, the base station may perform a handover decision according to the measurement report and the RRM information corresponding to the neighboring cell; or the base station may perform the handover decision according to the measurement report, the RRM information corresponding to the neighboring cell, and the channel quality information of the relay link corresponding to the neighboring cell. .

Step 604: The base station generates bearer configuration information of the target access link according to the QoS information corresponding to the target access link that is learned in advance.

In this embodiment, the QoS information corresponding to the target access link may include at least one of the following: QCI, ARP, MBR, GBR, and AMBR.

In this embodiment, the eNB establishes and maintains the service on the two-hop link in a manner that the base station uses the centralized control distribution, so when the UE attached to the RN accesses the network, the base station can The QoS information corresponding to the target access link corresponding to the service supported by the UE is obtained in advance, that is, the eNB can obtain the QoS information corresponding to the target access link required to generate the bearer configuration information of the target access link in advance. Therefore, in the handover request sent by the RN to the base station in the step 602, the QoS information corresponding to the target access link does not need to be carried in the handover request.

Step 605: The base station sends a handover command (blHandoverCommand) to the RN, where the handover command includes bearer reconfiguration information of the target access link.

Specifically, the bearer reconfiguration information of the target access link may include: a bearer-related parameter of the target access link that is reconfigured for the service accepted by the target cell.

Step 606: The RN sends a radio resource control connection reconfiguration message (RRCConnectionReconfiguration) to the UE, where the radio resource control connection reconfiguration message includes bearer reconfiguration information of the target access link.

Specifically, the UE may establish a target access link bearer with the base station according to the bearer reconfiguration information of the target access link.

Step 607: The UE randomly accesses the base station.

Step 608: The UE sends a radio resource control connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the base station.

After performing step 607 and step 608, the UE completes the handover.

In this embodiment, the step 601 and the step 602 may further include: the RN performs a preliminary determination according to the measurement result reported by the UE, and when the RN queries the cell that the service quality is better than the source cell, the RN determines to perform the handover. Step 602 and step 603 are performed again, and in step 603, the base station performs a final decision according to the measurement report.

In the technical solution of the embodiment, the eNB establishes and maintains the service on the two-hop link in a manner that the base station uses the centralized control distribution, so when the UE attached to the RN accesses the network, the base station can know in advance The QoS information corresponding to the target access link corresponding to the service supported by the UE does not require the RN to send the QoS information corresponding to the target access link to the base station through the Un interface, thereby saving the air interface resource of the Un interface. In addition, since the base station can also know in advance the user security related The context information of the user interface may include the encryption/integrity protection algorithm supported by the user, so that the RN does not need to send the user security related context information to the base station through the Un interface, thereby further saving the air interface resource of the Un interface. .

FIG. 7 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 7, the method includes:

Step 701: The UE reports a measurement report to the RN.

Step 702: The RN performs a handover decision according to the measurement report.

Step 703: The RN sends a handover request (blHandoverRequire) to the base station.

Steps 704 to 708 can refer to steps 604 to 608 in the embodiment of FIG. 6, and details are not described herein again.

In this embodiment, after the step 701 and before the step 702, the RN may further include: performing, by the RN, a preliminary handover decision according to the measurement result reported by the UE, and determining, when the RN queries, that the cell with a better quality of service than the source cell exists in the measurement report, . Step 702 and step 703 are performed again, and in step 703, the base station performs a final decision according to the handover decision information measurement report.

In this embodiment, the RN performs the handover decision according to the measurement report, and the RN does not need to send the measurement report to the base station through the Un interface, thereby saving the air interface resource of the Un interface.

FIG. 8 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 8, the method includes:

Step 801: The RN sends a handover request to the base station, where the handover request includes QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link.

In this embodiment, the source access link is a link between the UE and the RN.

Step 802: The RN receives the bearer reconfiguration information of the target access link sent by the base station, where the bearer reconfiguration information of the target access link is determined by the base station according to the QoS information corresponding to the service supported by the UE and the corresponding on the source access link. After the PDB determines to reconfigure the bearer configuration information of the source access link, the root The QoS information corresponding to the service supported by the UE is generated.

Step 803: The RN sends the bearer reconfiguration information of the target access link to the user equipment.

In the technical solution of the embodiment, after the RN sends the handover request to the base station, the base station generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the service supported by the UE in the handover request, and uses the RN to connect the target access link. The bearer reconfiguration information of the path is sent to the UE, so that the UE is handed over from the RN to the base station.

FIG. 9 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 9, the method includes:

Step 901: The UE reports a measurement report to the RN.

Step 902: The RN sends a handover request to the base station, where the handover request includes a measurement report, QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link.

Step 903: The base station performs a handover decision according to the measurement report.

Step 904: The base station determines, according to the QoS information corresponding to the service supported by the UE, and the corresponding PDB on the source access link, whether to reconfigure the bearer configuration information of the source access link. If yes, go to step 905; if no, Then step 908 is performed.

Step 905: The base station generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the service supported by the UE.

Step 906: The base station sends a handover command to the RN, where the handover command includes bearer reconfiguration information of the target access link.

Step 907: The RN sends a radio resource control connection reconfiguration message to the UE, where the radio resource control connection reconfiguration message includes bearer reconfiguration information of the target access link, and step 910 is performed.

Step 908: The base station sends a handover command to the RN.

Step 909: The RN sends a radio resource control connection reconfiguration message to the UE, and step 910 is performed. In this step, after receiving the radio resource control connection reconfiguration message, the UE learns to continue to use the radio resource control connection reconfiguration message. Bearer configuration information of the source access link.

Step 910: The UE randomly accesses the base station.

Step 911: The UE sends a radio resource control connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the base station.

In this embodiment, after the step 901 and before the step 902, the RN may further include: performing, by the RN, a preliminary determination according to the measurement result reported by the UE, and determining, when the RN queries, that the cell with a better quality of service than the source cell exists in the measurement report. Step 902 and step 903 are performed again, and in step 903, the base station performs a final decision according to the measurement report.

In the technical solution of the embodiment, when the base station determines the bearer configuration information of the source access link according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link included in the received handover request, After the configuration, the bearer reconfiguration information of the target access link is generated according to the QoS information corresponding to the service supported by the UE, and the bearer reconfiguration information of the target access link is sent to the UE through the RN, so that the UE is switched from the RN to the base station. . When the base station determines that the bearer configuration information of the target access link does not need to be reconfigured according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link, the eNB can pass the RN. The handover response is directly returned to the UE, so that the UE accesses the base station according to the bearer configuration information of the source access link, so that the UE is handed over from the RN to the base station.

FIG. 10 is a flowchart of another handover method according to an embodiment of the present invention. As shown in FIG. 10, the method includes:

Step 1001: The UE measures 4 reports on the RN.

Step 1002: The RN performs a handover decision according to the measurement report.

Step 1003: The RN sends a handover request to the base station, where the handover request includes QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link.

Steps 1004 to 1011 can be referred to steps 904 to 911 in the embodiment of FIG. In the technical solution of the embodiment, the RN performs the handover decision according to the measurement report, and the RN does not need to send the measurement report to the base station through the Un interface, thereby saving the air interface resource of the Un interface.

FIG. 11 is a schematic structural diagram of a relay node according to an embodiment of the present invention. As shown in FIG. 11, the relay node includes a first receiving module 11, a first establishing module 12, a first generating module 13, and a first sending. Module 14.

The first receiving module 11 receives a handover request sent by the base station, where the handover request includes bearer configuration information of the relay link and QoS information corresponding to the target access link. The first establishing module 12 establishes a relay link bearer according to the bearer configuration information of the relay link. The first generation module 13 generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link. The first sending module 14 sends the bearer reconfiguration information of the target access link to the UE through the base station.

Further, when the QoS information corresponding to the target access link includes the corresponding PDB on the target access link, the first generating module 13 may directly generate the bearer of the target access link according to the QoS information corresponding to the target access link. Reconfigure information.

Further, when the handover request sent by the first receiving module 11 includes the corresponding PDB on the relay link, the first generation module 13 may be configured according to the QoS information corresponding to the target access link and the corresponding PDB on the relay link. , generating bearer reconfiguration information of the target access link.

After receiving the handover request sent by the base station, the relay node in this embodiment establishes a relay link bearer according to the bearer configuration information of the relay link in the handover request, and generates a target access according to the QoS information corresponding to the target access link. The bearer reconfiguration information of the link, and the bearer reconfiguration information of the target access link is sent to the UE through the base station, so that the UE is handed over from the base station to the relay node.

FIG. 12 is a schematic structural diagram of another relay node according to an embodiment of the present invention. As shown in FIG. 12, the relay node includes: a second sending module 21 and a second receiving module 22.

The second transmitting module 21 transmits a handover request to the base station. The second receiving module 22 receives bearer reconfiguration information of the target access link sent by the base station. The second sending module 21 sends the bearer reconfiguration information of the target access link received by the second receiving module 22 to the UE.

After receiving the handover request to the base station, the relay node in this embodiment receives the target access sent by the base station. The bearer reconfiguration information of the link, the relay node sends the received bearer reconfiguration information of the target access link sent by the base station to the UE, so that the UE switches from the relay node to the base station.

FIG. 13 is a schematic structural diagram of another relay node according to an embodiment of the present invention. As shown in FIG. 13, the relay node includes: a second sending module 21 and a second receiving module 22.

The second transmitting module 21 transmits a handover request to the base station. The second receiving module 22 receives the bearer reconfiguration information of the target access link sent by the base station, and the bearer reconfiguration information of the target access link is generated by the base station according to the QoS information corresponding to the target access link that is known in advance. The second sending module 21 sends bearer reconfiguration information of the target access link to the UE.

Further, the second receiving module 22 may further receive the measurement report reported by the UE, and the handover request sent by the second sending module 21 to the base station may further include a measurement report reported by the UE, so that the base station performs a handover decision according to the measurement report.

Further, the relay node may further include a first handover decision module 23. The first handover decision module 23 can make a handover decision based on the measurement report received by the second receiving module 22. The handover decision made by the first handover decision module 23 may be a preliminary handover decision. After the first handover decision module 23 performs the preliminary handover decision, the second transmission module 21 sends a handover request including the measurement report to the base station, so that the base station can perform the measurement according to the measurement. The report makes the final handover decision.

After the relay node of the embodiment sends a handover request to the base station, the base station generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link that is learned in advance, and the relay node sends the received base station. The bearer reconfiguration information of the target access link is sent to the UE, so that the UE is handed over from the relay node to the base station.

In this embodiment, the handover request sent by the second sending module 21 to the base station may include QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link. The second receiving module 22 may receive the bearer reconfiguration information of the target access link sent by the base station, where the bearer reconfiguration information of the target access link is determined by the base station according to the QoS information corresponding to the service supported by the UE and the source access link. The corresponding PDB determines to reconfigure the bearer configuration information of the source access link, and then generates the QoS information corresponding to the service supported by the UE. The second sending module 21 connects the target The bearer reconfiguration information of the inbound link is sent to the UE.

After the relay node of the embodiment sends a handover request to the base station, the base station generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the service supported by the UE in the handover request, and the relay node sends the received base station. The bearer reconfiguration information of the target access link is sent to the UE, so that the UE is handed over from the RN to the base station.

FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 14, the base station includes: a fourth sending module 41 and a fourth receiving module 42.

The fourth sending module 41 sends a handover request to the RN, where the handover request includes bearer configuration information of the relay link and QoS information corresponding to the target access link, so that the RN establishes a relay chain according to the bearer configuration information of the relay link. The bearer and the bearer reconfiguration information of the target access link are generated according to the QoS information corresponding to the target access link, and the bearer reconfiguration information of the target access link is sent to the fourth receiving module 42. The fourth receiving module 42 receives the bearer reconfiguration of the target access link. The fourth transmitting module 41 transmits the bearer reconfiguration of the target access link received by the fourth receiving module 42 to the UE.

The RN in this embodiment can use the RN in the embodiment of Fig. 11.

The base station in this embodiment sends a handover request to the relay node, so that the relay node establishes a relay link bearer according to the bearer configuration information of the relay link in the handover request, and generates a target according to the QoS information corresponding to the target access link. The bearer reconfiguration information of the access link is sent by the base station to the UE, so that the UE is handed over from the base station to the relay node.

FIG. 15 is a schematic structural diagram of another base station according to an embodiment of the present invention. As shown in FIG. 15, the base station includes: a fifth receiving module 51, a second generating module 52, and a fifth sending module 53.

The fifth receiving module 51 receives the handover request sent by the RN. After receiving the handover request sent by the RN, the second generation module 52 generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link that is known in advance. The fifth sending module 53 sends the bearer reconfiguration information of the target access link to the UE through the RN.

The RN in this embodiment can use the RN in the embodiment shown in FIG. After receiving the handover request sent by the relay node, the base station in this embodiment generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link that is learned in advance, and the bearer of the target access link is heavy. The configuration information is sent to the UE through the RN, so that the UE is handed over from the RN to the base station.

FIG. 16 is a schematic structural diagram of another base station according to an embodiment of the present invention. As shown in FIG. 16, the base station includes: a sixth receiving module 61, a first determining module 62, a third generating module 63, and a sixth sending module 64. .

The sixth receiving module 61 receives the handover request sent by the RN, where the handover request includes QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link. The first judging module 62 determines whether to reconfigure bearer configuration information of the source access link according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link. The third generation module 63, when the first determination module 62 determines to reconfigure the bearer configuration information of the source access link according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link, according to the UE support The QoS information corresponding to the service generates bearer reconfiguration information of the target access link. The sixth transmitting module 64 transmits bearer reconfiguration information of the target access link to the UE via the RN.

The RN in this embodiment can use the RN in the embodiment shown in FIG.

After receiving the handover request sent by the RN, the base station in this embodiment generates bearer reconfiguration information of the target access link according to the QoS information corresponding to the service supported by the UE in the handover request, and receives the received bearer of the target access link. The reconfiguration information is sent to the UE through the RN, so that the UE is handed over from the RN to the base station.

FIG. 17 is a schematic structural diagram of a handover system according to an embodiment of the present invention. As shown in FIG. 17, the handover system includes a relay node 1 and a base station 2.

The relay node 1 can employ the relay node in the embodiment of Fig. 11, and the base station 2 can use the base station in the embodiment of Fig. 14.

Alternatively, the relay node 1 may employ the relay node in the embodiment shown in Fig. 13, and the base station 2 may use the base station in the embodiment of Fig. 15.

Alternatively, the relay node 1 can use the relay node in the embodiment shown in FIG. 13, and the base station 2 can be used. The base station in the embodiment of Fig. 16.

The handover system in this embodiment can implement handover between the relay node and the base station by the UE.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., which can store various program codes. Finally, the above embodiments are only used to illustrate the technical solution of the present invention. The invention is described in detail with reference to the foregoing embodiments, and those of ordinary skill in the art should understand that the technical solutions described in the foregoing embodiments may be modified or some of the techniques may be The features are equivalent to those of the embodiments of the present invention.

Claims

Rights request

A switching method, comprising:

The relay node receives the handover request sent by the base station, where the handover request includes the bearer configuration information of the relay link and the quality of service QoS information corresponding to the target access link;

2. The method according to claim 1, wherein the QoS information corresponding to the target access link comprises a corresponding packet delay budget PDB on the target access link.

The method according to claim 1, wherein the handover request further includes a corresponding PDB on the relay link;

The generating, by the RN, the bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link, includes: the RN according to the QoS information corresponding to the target access link, and the relay link The corresponding PDB is configured to generate bearer reconfiguration information of the target access link.

The method according to claim 1, wherein the RN includes a target RN; the method further includes:

The target RN receives user plane data buffered and transmitted by the source base station to which the source RN is attached.

5. A switching method, comprising:

The relay node RN sends a handover request to the base station;

The method according to claim 5, wherein the bearer reconfiguration information of the target access link is generated by the base station according to the quality of service QoS information corresponding to the target access link that is known in advance.

The method according to claim 5, wherein the handover request includes QoS information corresponding to a service supported by the UE, bearer configuration information of the source access link, and a corresponding packet delay on the source access link. Budget PDB;

The bearer reconfiguration information of the target access link is determined by the base station according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link to determine the bearer of the source access link. After the configuration information is reconfigured, it is generated according to the QoS information corresponding to the service supported by the UE.

The method according to any one of claims 5 to 7, wherein the handover request further includes a measurement report reported by the user equipment; after the RN sends a handover request to the base station, the method further includes: The base station performs a handover decision according to the measurement report.

The method according to claim 8, wherein before the RN sends a handover request to the base station, the method further includes:

Receiving, by the RN, a measurement report reported by the user equipment;

The RN performs a preliminary handover decision according to the measurement report.

10. A relay node, comprising:

a first receiving module, configured to receive a handover request sent by the base station, where the handover request includes a relay link bearer configuration information and quality of service QoS information corresponding to the target access link;

a first establishing module, configured to establish a relay link bearer according to bearer configuration information of the relay link;

a first generation module, configured to generate bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link;

The relay node according to claim 10, wherein the QoS information corresponding to the target access link includes a corresponding packet delay budget PDB on the target access link.

The relay node according to claim 10, wherein the handover request further includes a corresponding PDB on the relay link; The first generation module is configured to generate bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link and the corresponding PDB on the relay link.

13. A relay node, comprising:

The relay node according to claim 13, wherein the bearer reconfiguration information of the target access link is generated by the base station according to the quality of service QoS information corresponding to the target access link that is known in advance.

The relay node according to claim 13, wherein the handover request includes QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding packet delay on the source access link. Budget PDB;

The relay node according to any one of claims 13 to 15, wherein the second receiving module is further configured to receive a measurement report reported by the user equipment; and the switching request further includes the measurement report, where The base station performs a handover decision according to the measurement report.

17. A base station, the base station comprising:

a fourth sending module, configured to send a handover request to the relay node RN, where the handover request includes bearer configuration information of the relay link and QoS information corresponding to the target access link, so that the RN configures according to the bearer of the relay link Generating a relay link bearer and generating bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link, and transmitting the bearer reconfiguration information of the target access link to the fourth receiving module;

The fourth receiving module is configured to receive a bearer reconfiguration of the target access link, and send the User equipment UE.

18. A base station, the base station comprising:

a fifth receiving module, configured to receive a handover request sent by the relay node RN;

a second generation module, configured to: after the fifth receiving module receives the handover request sent by the RN, generate bearer reconfiguration information of the target access link according to the QoS information corresponding to the target access link in advance;

The fifth sending module is configured to send bearer reconfiguration information of the target access link to the UE by using an RN.

19. A base station, the base station comprising:

a sixth receiving module, configured to receive a handover request sent by the RN, where the handover request includes QoS information corresponding to the service supported by the UE, bearer configuration information of the source access link, and a corresponding PDB on the source access link;

The first determining module is configured to determine, according to the QoS information corresponding to the service supported by the UE, and the corresponding PDB on the source access link, whether to reconfigure bearer configuration information of the source access link;

a third generation module, configured to: after the first determining module reconfigures the bearer configuration information of the source access link according to the QoS information corresponding to the service supported by the UE and the corresponding PDB on the source access link, The QoS information corresponding to the service supported by the UE generates bearer reconfiguration information of the target access link;

a sixth sending module, configured to send, by using an RN, bearer reconfiguration information of the target access link

UE.