CN100428847C - Centralized multihop wireless network access method - Google Patents
Centralized multihop wireless network access method Download PDFInfo
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- CN100428847C CN100428847C CNB2005100597598A CN200510059759A CN100428847C CN 100428847 C CN100428847 C CN 100428847C CN B2005100597598 A CNB2005100597598 A CN B2005100597598A CN 200510059759 A CN200510059759 A CN 200510059759A CN 100428847 C CN100428847 C CN 100428847C
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Abstract
The present invention provides an access method of a centralization type multi-jump wireless network. The wireless network comprises an access point, a service agent connected with the access point, at least one middle-relay node and at least one mobile node, wherein access information relative to the mobile nodes is stored in the access point or the service agent; access information relative to the mobile nodes is announced to the middle-relay nodes adjacent to the mobile nodes by the access point; access request information is sent to one middle-relay node adjacent to the mobile nodes by the mobile nodes; access permission information is returned to the mobile nodes by the middle-relay nodes receiving the access request information; routing renewal information is sent to the next middle-relay node by the middle-relay nodes until the routing renewal information is transmitted to the access point; the access point carries out routing renewal. The mobile nodes of the present invention obtain the access permission information in the position of a middle-relay node, and the access time of the mobile nodes is greatly reduced.
Description
(1) technical field
The present invention relates to a kind of cut-in method of centralized multi-hop wireless network, more particularly, relate to a kind of back 3 g mobile communication and the 4th third-generation mobile communication (Beyond Three Generation/Fourth Generation; B3G/4G) cut-in method of the multi-hop wireless network in the system.
(2) background technology
Along with 3G (Third Generation) Moblie (Third Generation Communication; Commercialization 3G) begins, have higher rate, more spectral efficient, better cover and the B3G/4G technology of stronger service supporting capacity also begins to enter predevelopment phase, plan to finish spectrum allocation may in 2007, finished main standard in 2010, beginning in 2012 is commercial, and the scale commercialization had high input after 2015.The B3G system is 600,000,000 to the demand of frequency spectrum at least.For the frequency range demand in such broadband, in existing frequency range, be difficult to find, therefore need distribute higher frequency range for B3G and 4G.
Though higher frequency band can solve the frequency-assignment problem of B3G, frequency range is high more, and electromagnetic diffracting power is poor more, penetration power is poor more.In this case, this electromagnetic wave also just more and more approaches straightline propagation, if there is building, will cause " shade " area that exists a lot of electromagnetic waves to arrive in the sub-district.For example, if mobile node (Mobile Node MN) is behind a building, since signal arrive this mobile node place around can ability making signal can't walk around building, also arrive this mobile node place in addition, so this mobile node might not receive from signal of base station owing to the penetration capacity difference of signal also makes signal can't pass this building.
In addition, frequency range is high more, and attenuation of Electromagnetic is big more, and promptly transmitting power has decay.The decay of base station transmitting power can cause the coverage of sub-district to diminish, and makes under the constant situation of coverage that perhaps the control of cell edge power is not ideal enough, thereby causes a lot of transmission errors.And, because people wish that electromagenetic wave radiation weakens the influence of human body, require the transmitting power of base station further to reduce, this can further increase the weight of the problems referred to above.
A kind of scheme that addresses the above problem is that cellular sub-district is repartitioned, make the scope that original cell reduction can reach to the power of base station, and then on each sub-district that has dwindled a base station is set all.Therefore but this method need connect each base station with optical fiber, uses inconvenience, and especially to be that private area or other inconvenience are used when optical fiber regional is set inconvenient more when the zone of optical fiber process.
For this reason, the notion of multihop network has appearred in wireless communication field, has increased via node (RelayNode between base station and mobile node; RN), thus constituted the path of base station-via node-mobile node.Above-mentioned via node may have only one, also may be a plurality of.This multihop network reduces the required power of each via node greatly, and the node in multihop network only needs enough transmitting powers just can arrive adjacent node.Secondly, because each node power in the mesh network is very low, in fact the equipment that therefore is positioned at the network different piece can be launched simultaneously in same frequency, and do not produce interference.This multiplexing spatial content that improves network of frequency spectrum has also brought the higher network bandwidth than short distance between the node.
Fig. 1 is that mobile node is linked into signaling process schematic diagram in the multihop network for the first time in the prior art.Mobile node MN at first sends one to nearest via node RN and inserts request message among the figure, and this via node is transmitted this access request message to its next via node, is transmitted to access point (Access Point until should insert request message; AP), this access point AP connects a service broker (Service Agent; SA), this service broker SA comprises route and access information.If this service broker SA authentication is legal from the information of mobile node, then can notify access point AP, AP sets up the route that returns to mobile node message.AP issues first via node according to selected route with access permission message, and this via node is given next via node with this access permission forwards, until give above-mentioned mobile node with this access permission forwards.
Fig. 2 is the signaling process schematic diagram that is linked into after mobile node moves in the prior art in the multihop network.Position before the representative of the mobile node MN of dotted line does not have to move among the figure, mobile node MN at first moves according to the direction of arrow, this mobile node MN sends one to nearest via node RN and inserts request message subsequently, this via node is transmitted this access request message to its next via node, be transmitted to access point AP until should insert request message, this access point AP connects a service broker SA, and this service broker SA comprises route and access information.If this service broker SA authentication is legal from the information of mobile node, then can notify access point AP, the AP change returns to the route of mobile node message.AP issues first via node according to the route after changing with access permission message, and this via node is given next via node with this access permission forwards, the mobile node after giving above-mentioned moving with this access permission forwards.
But, owing to have a plurality of nodes, when mobile node inserts in multihop network, network layer, Access Layer, physical layer all will be passed through in everywhere in access point AP, via node RN, mobile node MN, encode, information processing such as decoding and route, therefore the network insertion time is long, access delay can be bigger, is unfavorable for the seamless access of mobile node in moving process.
(3) summary of the invention
The cut-in method that the purpose of this invention is to provide a kind of centralized multi-hop wireless network makes mobile node when a sub-district moves to the another one sub-district, adopts this method can improve access speed, guarantee communication data especially speech data can not be interrupted.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of cut-in method of centralized multi-hop wireless network, this wireless network comprise an access point, service broker who links to each other with this access point, at least one via node, at least one mobile node, it is characterized in that this method comprises the steps:
(1) each mobile node is notified above-mentioned access point with the access information relevant with this mobile node when above-mentioned wireless network login:
(2) the storage access information relevant in above-mentioned access point or in above-mentioned service broker with this mobile node;
(3) above-mentioned access point is to all via node notices with this mobile node relevant access information adjacent with this mobile node, perhaps, above-mentioned access point is notified the access information relevant with this mobile node at least one via node that this mobile node of prediction moves;
(4) this mobile node sends to a via node adjacent with this mobile node and inserts request message;
(5) via node of above-mentioned reception access request message returns an access permission message to this mobile node;
(6) above-mentioned reception inserts the via node of request message to routing update message of next via node transmission, this next one via node continues to transmit this routing update message to other via nodes, until this routing update message is forwarded to above-mentioned access point;
(7) above-mentioned access point or above-mentioned service broker carry out routing update.
According to another aspect of the present invention, above-mentioned advice method is broadcast mode, multicast mode or mode of unicast.
According to a further aspect of the invention, after the above-mentioned via node of depositing the access information relevant with this mobile node is deposited the access information relevant with this mobile node, with the access information deletion that receives.
According to a further aspect of the invention, after the above-mentioned via node of depositing the access information relevant with this mobile node was deposited the access information relevant with this mobile node, the time of this access information deletion was set by above-mentioned via node or the above-mentioned access point of depositing the access information relevant with this mobile node.
According to another aspect of the present invention, after receiving the deletion signaling of sending with the current via node of getting in touch of this mobile node, the via node of depositing the access information relevant with this mobile node is with the access information deletion of receiving.
Core of the present invention is: give notice to the via node adjacent with each mobile node in network, inform the access information relevant with this mobile node.
As seen, method provided by the present invention has the following advantages:
(1) cut-in method of centralized multi-hop wireless network provided by the present invention, originally the access information that was arranged in the service broker of network is moved near the mobile node via node, mobile node no longer needs to obtain access permission message by access point when inserting, and only need obtain access permission message with an adjacent via node place, greatly shorten the transmission of access signaling, greatly reduced turn-on time of mobile node.
(2) cut-in method of centralized multi-hop wireless network provided by the present invention, make mobile node in the high-speed mobile process or when a sub-district runs to the another one sub-district, can realize seamless access, this is extremely important for the transfer of data in the B3G network, especially voice data transmission, making the user can not feel has the phenomenon of conversation short interruption, remains and talks about matter clearly.
(3) cut-in method of centralized multi-hop wireless network provided by the present invention, only need the via node place in network that one storage area is set, be used for storing and the corresponding access information of each mobile node, little with respect to the change that prior art equipment is done, save cost.
(4) cut-in method of centralized multi-hop wireless network provided by the present invention, do not influence the enforcement of prior art, if adopt this method can't obtain the up-to-date access information of mobile node, still can carry out network insertion, therefore with the prior art compatibility according to the method for prior art.
(4) description of drawings
Fig. 1 is that mobile node is linked into signaling process schematic diagram in the multihop network for the first time in the prior art.MN is a mobile node among the figure, and RN is a via node, and AP is an access point.
Fig. 2 is the signaling process schematic diagram that is linked into after mobile node moves in the prior art in the multihop network.
Fig. 3 is linked into after mobile node moves among the present invention to get the signaling process schematic diagram in the multihop network.
(5) embodiment
Describe the present invention below in conjunction with accompanying drawing.
The prerequisite that the present invention realizes is: adopt multihop network in the mobile radio networks of B3G and 4G, the base station is commonly called access point AP, has increased via node RN between access point and mobile node.Above-mentioned via node RN may have only one, also may be a plurality of.At Network Access Point AP place a service broker SA is arranged, this service broker goes up the routing iinformation of storage mobile node MN.Above-mentioned service broker SA also can be arranged in any other place of the network that links to each other with access point.
Based on above-mentioned prerequisite, the present invention proposes a kind of cut-in method of centralized multi-hop wireless network, referring to shown in Figure 3.MN among Fig. 3 is a mobile node, for example the notebook computer of travelling carriage (Mobile Station) or band wireless network card.Dotted line among Fig. 3 is the position at the initial place of mobile node.
The mobile node start is to network registry, and with the access information notice access point AP relevant with this mobile node, AP gives notice to the via node adjacent with mobile node MN such as RN1, RN2, notifies the access information relevant with this MN simultaneously.Deposit the access information relevant among RN1, the RN2 more respectively with this MN.
One or several via nodes adjacent with RN1 for example RN2, RN3 are monitored and are predicted the mobile of MN, suppose that RN2 predicts MN and moves in its vicinity, and access point AP just is notified to RN2 with the access information of MN; Perhaps, do not need adjacent via node that the mobile of MN predicted, and the access information of directly notifying this MN to the via node RN1 adjacent with this MN, RN2 by access point AP.The mode of notice can be broadcasting, also can be multicast or clean culture.
Mobile node MN is moved by initial position, and moving the most approaching via node of back and MN is RN2.Because access point AP just is notified to RN2 with the access information of MN, so RN2 has learnt the access information of MN.
Mobile node MN is to sending the access request message apart from its nearest via node RN2, and owing to the access information that gets this MN of cicada on the RN2, so RN2 returns an access permission message to this MN immediately.
Via node RN2 sends a routing update message to next via node RN3, and RN3 is transmitted to access point AP with this routing update message again.
Above-mentioned access point AP carries out routing update, and the routing iinformation that upgrades is stored among the service broker SA that links to each other with this AP.Deposit the access information relevant among the via node RN1 after a period of time,, can set by via node during this period of time the access information deletion that receives with this mobile node; Perhaps after receiving the deletion signaling of sending with the current via node RN2 that gets in touch of above-mentioned mobile node, via node RN1 is with the access information deletion relevant with MN of depositing.
If mobile node MN is not learnt the access information that this MN is up-to-date as yet with the immediate via node RN2 of MN after moving, then MN sends to other via nodes that are adjacent and inserts request message.If the also up-to-date access information of this MN not on other via nodes adjacent with this MN, then MN sends to RN2 and inserts request message, RN2 will insert request message again and transmit to other adjacent via nodes, should insert request message always and send to access point AP, promptly finish access according to the flow process of the prior art that Fig. 1 discussed.
By above-mentioned cut-in method, originally the access information that was arranged in the service broker of network is moved near the mobile node via node, mobile node no longer needs to obtain access permission message by access point when inserting, and only need obtain access permission message with an adjacent via node place, greatly reduce the turn-on time of mobile node, guaranteed the seamless access of mobile node in moving process.
Claims (5)
1. the cut-in method of a centralized multi-hop wireless network, this wireless network comprise an access point, service broker who links to each other with this access point, at least one via node, at least one mobile node, it is characterized in that this method comprises the steps:
(1) each mobile node is notified above-mentioned access point with the access information relevant with this mobile node when above-mentioned wireless network login:
(2) the storage access information relevant in above-mentioned access point or in above-mentioned service broker with this mobile node;
(3) above-mentioned access point is to all via node notices with this mobile node relevant access information adjacent with this mobile node, perhaps, above-mentioned access point is notified the access information relevant with this mobile node at least one via node that this mobile node of prediction moves;
(4) this mobile node sends to a via node adjacent with this mobile node and inserts request message;
(5) via node of above-mentioned reception access request message returns an access permission message to this mobile node;
(6) above-mentioned reception inserts the via node of request message to routing update message of next via node transmission, this next one via node continues to transmit this routing update message to other via nodes, until this routing update message is forwarded to above-mentioned access point;
(7) above-mentioned access point or above-mentioned service broker carry out routing update.
2. the cut-in method of a kind of centralized multi-hop wireless network as claimed in claim 1, it is characterized in that: above-mentioned advice method is broadcast mode, multicast mode or mode of unicast.
3. the cut-in method of a kind of centralized multi-hop wireless network as claimed in claim 1 or 2, it is characterized in that: after the via node of depositing the access information relevant with this mobile node is deposited the access information relevant with this mobile node, the access information deletion that receives.
4. the cut-in method of a kind of centralized multi-hop wireless network as claimed in claim 3, it is characterized in that: after the above-mentioned via node of depositing the access information relevant with this mobile node was deposited the access information relevant with this mobile node, the time of this access information deletion was set by above-mentioned via node or the above-mentioned access point of depositing the access information relevant with this mobile node.
5. the cut-in method of a kind of centralized multi-hop wireless network as claimed in claim 1 or 2, it is characterized in that: after receiving the deletion signaling of sending with the current via node of getting in touch of this mobile node, the via node of depositing the access information relevant with this mobile node is with the access information deletion of receiving.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100597598A CN100428847C (en) | 2005-03-31 | 2005-03-31 | Centralized multihop wireless network access method |
| AT06725443T ATE424077T1 (en) | 2005-03-31 | 2006-03-30 | ACCESS METHOD FOR A WIRELESS MULTI-JUNK NETWORK |
| KR1020077025182A KR101258156B1 (en) | 2005-03-31 | 2006-03-30 | An access method for a multi―hop wireless network |
| EP06725443A EP1864447B1 (en) | 2005-03-31 | 2006-03-30 | An access method for a multi-hop wireless network |
| EA200702131A EA010982B1 (en) | 2005-03-31 | 2006-03-30 | An access method for a multi-hop wireless network |
| DE602006005344T DE602006005344D1 (en) | 2005-03-31 | 2006-03-30 | ACCESS PROCESS FOR A WIRELESS MULTIPLE NETWORK |
| PCT/EP2006/061195 WO2006103276A1 (en) | 2005-03-31 | 2006-03-30 | An access method for a multi-hop wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100597598A CN100428847C (en) | 2005-03-31 | 2005-03-31 | Centralized multihop wireless network access method |
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| CN1842208A CN1842208A (en) | 2006-10-04 |
| CN100428847C true CN100428847C (en) | 2008-10-22 |
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| CNB2005100597598A Expired - Fee Related CN100428847C (en) | 2005-03-31 | 2005-03-31 | Centralized multihop wireless network access method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198619A (en) * | 1997-05-01 | 1998-11-11 | 美国电报电话公司 | Multi-jump communication system |
| JP2002171283A (en) * | 2000-11-14 | 2002-06-14 | Lucent Technol Inc | Method and device used for node of packet network |
| US20020145978A1 (en) * | 2001-04-05 | 2002-10-10 | Batsell Stephen G. | Mrp-based hybrid routing for mobile ad hoc networks |
| US20040198467A1 (en) * | 2003-01-21 | 2004-10-07 | Philip Orlik | System and method for reducing power consumption in a wireless communications network |
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2005
- 2005-03-31 CN CNB2005100597598A patent/CN100428847C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198619A (en) * | 1997-05-01 | 1998-11-11 | 美国电报电话公司 | Multi-jump communication system |
| JP2002171283A (en) * | 2000-11-14 | 2002-06-14 | Lucent Technol Inc | Method and device used for node of packet network |
| US20020145978A1 (en) * | 2001-04-05 | 2002-10-10 | Batsell Stephen G. | Mrp-based hybrid routing for mobile ad hoc networks |
| US20040198467A1 (en) * | 2003-01-21 | 2004-10-07 | Philip Orlik | System and method for reducing power consumption in a wireless communications network |
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| CN1842208A (en) | 2006-10-04 |
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