CN100527671C - Information updating method of radio network - Google Patents
Information updating method of radio network Download PDFInfo
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- CN100527671C CN100527671C CNB2005100534565A CN200510053456A CN100527671C CN 100527671 C CN100527671 C CN 100527671C CN B2005100534565 A CNB2005100534565 A CN B2005100534565A CN 200510053456 A CN200510053456 A CN 200510053456A CN 100527671 C CN100527671 C CN 100527671C
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Abstract
This invention relates to an information refreshment method for radio mesh, in which, said mesh includes a MAP and a terminal accesses the mesh by the MAP, which stores the path information and position information of terminals of the MAP on the mesh, when said information changes, the MAP refreshes the related information and uses it to process data. This invention applies different route systems against the property of the mesh to increase the system performance.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of information updating method of based on wireless mesh network.
Technical background
WMN is a kind of novel broadband wireless network structure, it is the distributed network of a kind of high power capacity, two-forty, it is different from traditional wireless network, can regard the fusion of WLAN (wireless local area network) and mobile Ad hoc network (claiming mobile ad-hoc network again) as, and bring into play both advantages.Fig. 1 is an example of WMN network, is used for illustrating the characteristics of WMN network.
As shown in Figure 1, the WMN network can provide the access function of client downwards, also has a MGW gateway in the WMN network, by MGW WMN is linked in the core network.The function that this MGW is actually WAP expands, in the process of message transmission, and can be with this MGW and the same processing of MAP.MAP1 among Fig. 1, MAP2, MGW, Client1 etc. are a sign just, can be the entity with identical function in the practical application.
The WMN network is netted topological structure, how to be the transmission route of the best of service selection therefore, is technology the most key in the WMN network.In Fig. 1, client1 will communicate by letter with client2, according to network topology structure, has two routes available: client1-MAP1-MGW-MAP3-client2, and client1-MAP1-MAP2-MAP3-client2.How finding the topological structure of WMN, how to find route, and how to select best path, is the technology of most critical in the WMN network.
In the WMN network, topology of networks can dynamic change simultaneously.With Fig. 1 is example, MAP1 in the network topology, MAP2, MAP3, MGW, client1, client2 may break down when normal operation, also new MAP, MGW, client may have been increased, all these situations all can cause network topology to change, and also just cause the variation of route simultaneously.
As shown in Figure 1, the WMN topology of networks is unpredictable changing dynamically, when this changes generation, if can not upgrade the routing iinformation of data passes in time, fast, then can cause networks efficiency low.In addition, the routing iinformation of each network node storage data volume is excessive, brings very big burden for the operation of network.
Summary of the invention
The invention provides a kind of scheme, can reduce the routing iinformation data volume of network node stores, reduce the burden of network, the variation of discovery WMN network topology that simultaneously can be real-time, the routing iinformation of real-time renewal network.
For this reason, the present invention adopts following technical scheme:
A kind of based on wireless mesh network information updating method, described based on wireless mesh network comprises based on wireless mesh network access point (MAP), terminal inserts based on wireless mesh network by MAP, preserve the MAP that each MAP lays respectively in the routing information of based on wireless mesh network and each terminal at MAP, when above-mentioned information changes, MAP is upgraded relevant information, and uses the information after upgrading to carry out data processing.
Described based on wireless mesh network also is set with based on wireless mesh network gateway node (MGW), by this MGW based on wireless mesh network is communicated with extranets.
Described MAP also preserves the routing information of MGW, and when this routing information changed, MAP was upgraded relevant information.
Described MGW preserves the routing information of MAP and the based on wireless mesh network access point that each terminal lays respectively at, and when above-mentioned information changed, MGW was upgraded relevant information.
Described MAP or MGW give updating steps to relevant information, carry out in real time.
The variation of the based on wireless mesh network access point that described each terminal lays respectively at, MAP or MGW one of in the following way or combination know: certain terminal location solicited message of broadcasting in based on wireless mesh network, to obtain the based on wireless mesh network access point that this terminal is positioned at;
MAP regularly broadcasts the based on wireless mesh network access point that terminal is positioned under it to based on wireless mesh network;
MAP reports the based on wireless mesh network access point that terminal is positioned under it to the fixed network node, obtains the based on wireless mesh network access point that each terminal lays respectively at by each MAP or MGW to this network node.
Described routing information is each MAP or the MGW topology information at based on wireless mesh network.
Described routing information is each MAP or the MGW routing iinformation at based on wireless mesh network.
The present invention is directed to the characteristics of based on wireless mesh network, adopted different routing mechanisms targetedly, improved the performance of system.Because the terminating layer mobility is very strong, frequent the changing of network topology meeting, so access point can learn designated terminal is under which MAP according to certain strategy, MAP does not need to obtain the detailed routing iinformation of terminal, can reduce like this and obtain the needed expense of routing iinformation.
Each MAP can be real-time tracking network changes of topology structure and new routing information more, when carrying out data service, can obtain routing iinformation at once like this, carry out the data routing forwarding, can not cause delay to the data business.Simultaneously since Access Layer have topological structure and can often not change, to the real-time update of the real-time tracking and the routing iinformation of access layer network topologies change, not generation that can be frequent, therefore little to the performance impact of network.The routing information of MAP storage comprises network topology or routing iinformation+MGW information+location information of terminals, because the present invention has only stored location information of terminals, rather than the detailed routing iinformation of terminal, therefore reduced access point canned data amount.
Description of drawings
Fig. 1 is the WMN schematic network structure;
Fig. 2 is a WMN network hierarchy schematic diagram of the present invention;
Fig. 3 is a network route schematic diagram of the present invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
We have at first analyzed the characteristics of WMN network, nodes such as the MAP in the WMN network, MGW generally are static mobile, its topological structure can be not frequent change, and the mobility of the terminal that the WMN network inserts below is very strong, what its topological structure then can be frequent changes.The network that we form nodes such as the MAP in the WMN network, MGW connects and calls Access Layer, the terminal that the WMN network is inserted below calls terminating layer, node in the terminating layer is called terminal, as shown in Figure 2, according to the otherness on Access Layer and the terminating layer mobility characteristics, the present invention adopts the mechanism of different discovering network topologies respectively to Access Layer and terminating layer.Here need to prove that this hierarchy just is convenient to the present invention program's description and the setting done, is not to be the essential layered mode of network itself, in practical solution, may have other layered mode, with the solution of the present invention contradiction not.
For Access Layer, because its topological structure can often not change, therefore adopt the mode that needs in advance to find network topology structure and routing iinformation, what is called need refer in advance, the just variation and the routing iinformation of tracking network topology in real time before data service needs routing iinformation.Therefore for Access Layer, as long as network topology structure changes, when changing as MAP or MGW position, performance etc., just adopt in the certain method notice Access Layer other MAP or MGW, make each MAP or MGW find the whole topological structure and the routing iinformation of Access Layer in real time, perhaps can calculate routing iinformation according to topological structure.It is multiple to notify the method for each MAP or MGW to have in the present invention, realize such as the thought that can use for reference OLSR agreement (rfc3626), but concrete which kind of method that adopts does not limit here to not influence of the present invention yet.
For terminating layer, each MAP only need learn that certain terminal is just passable under which MAP, can not need to learn the concrete routing iinformation of this terminal, soly can reduce the routing iinformation amount.Be positioned at certain MAP as long as known terminal,, can easily calculate the routing iinformation of this terminal, can reduce the data of terminal storage like this, significantly reduce the load of terminal, improve networks efficiency according to topology information or the routing iinformation of this MAP.
How each MAP of the present invention or MGW learn terminal is under which MAP, accomplished in many ways can be arranged, but, the present invention is not had influence no matter adopt which kind of method to realize, here do not limit, the invention provides MAP or MGW and learn three kinds of methods of terminal under which MAP:
1, terminal is found as required: what is called refers to as required, and when data service needed location information of terminals, terminal location request message of broadcasting obtained location information of terminals with this in the WMN network;
2, terminal need be found in advance: to its following all terminal information of WMN Web broadcast, each MAP or MGW obtain all location information of terminals with this to each MAP termly;
3, terminal is mixed discovery: selected Centroid in WMN, each MAP reports its all terminal information down to Centroid termly, like this when data service needs location information of terminals, MAP or MGW be as long as directionally obtain location information of terminals to Centroid, need be in whole WMN network broadcast request.
Therefore need write down WMN topology of networks and routing iinformation at each access point, main contents are as follows:
1, the routing iinformation of the network topology structure of Access Layer and each MAP or MGW;
2, the content of MGW refers to that mainly which node is the MGW point, has known the information of MGW, just can give outside core network the correct routing forwarding of data;
3, which access point is location information of terminals refer to certain terminal under.
These routing iinformations have been arranged, just can carry out forwarding of data.
Implementation provided by the invention does not have special requirement to terminal, to existing terminal, does not need to change, and can insert the WMN network, the investment of the existing terminal of protection.Such as, if adopt the WiFi technology between MAP and the terminal, the terminal of so existing any support WiFi can be linked in the WMN network.
The present invention divides the WMN network for Access Layer and terminating layer, and according to Access Layer and terminating layer the otherness on the mobility characteristics, adopted different routing mechanisms targetedly respectively, improved the performance of system.
Each access point can be followed the tracks of the routing iinformation of access layer network changes of topology structure and renewal Access Layer in real time among the present invention, like this when carrying out data service, can obtain routing iinformation at once, carry out the data routing forwarding, can not cause delay the data business.Simultaneously because Access Layer has the advantages that topological structure can often not change, real-time update to the real-time tracking and the routing iinformation of access layer network topologies change, not generation that can be frequent, therefore little to the performance impact of network, simultaneously owing to only stored location information of terminals at MAP, rather than the detailed routing iinformation of terminal, therefore reduced access point canned data amount.
Because the terminating layer mobility is very strong, frequent the changing of network topology meeting, so access point can learn designated terminal is under which MAP according to certain strategy, MAP does not need to obtain the detailed routing iinformation of terminal, can reduce like this and obtain the needed expense of routing iinformation.
Terminal discovery mechanism of the present invention can be handled flexibly according to network, service feature needs, increases systematic function, improves system effectiveness.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (8)
1, a kind of based on wireless mesh network information updating method, described based on wireless mesh network comprises the based on wireless mesh network access point, terminal inserts based on wireless mesh network by the based on wireless mesh network access point, it is characterized in that: preserve the based on wireless mesh network access point that each based on wireless mesh network access point lays respectively in the routing information of based on wireless mesh network and each terminal at the based on wireless mesh network access point, when above-mentioned information changes, the based on wireless mesh network access point is upgraded relevant information, and uses the information after upgrading to carry out data processing.
2, the method for claim 1 is characterized in that described based on wireless mesh network also is set with the based on wireless mesh network gateway node, by this based on wireless mesh network gateway node based on wireless mesh network is communicated with extranets.
3, method as claimed in claim 2 is characterized in that described based on wireless mesh network access point also preserves the routing information of based on wireless mesh network gateway node, and when this routing information changed, the based on wireless mesh network access point was upgraded relevant information.
4, method as claimed in claim 2, it is characterized in that the routing information of described based on wireless mesh network gateway node preservation based on wireless mesh network access point and the based on wireless mesh network access point that each terminal lays respectively at, when above-mentioned information changed, the based on wireless mesh network gateway node was upgraded relevant information.
5, method as claimed in claim 4 is characterized in that described based on wireless mesh network access point or based on wireless mesh network gateway node give updating steps to relevant information, carry out in real time.
6, method as claimed in claim 2 is characterized in that the variation of the based on wireless mesh network access point that lays respectively at of described each terminal, based on wireless mesh network access point or based on wireless mesh network gateway node one of in the following way or combination know:
Certain terminal location solicited message of broadcasting in based on wireless mesh network is to obtain the based on wireless mesh network access point that this terminal is positioned at;
The based on wireless mesh network access point is regularly broadcasted the based on wireless mesh network access point that terminal is positioned under it to based on wireless mesh network;
The based on wireless mesh network access point reports the based on wireless mesh network access point that terminal is positioned under it to the fixed network node, obtains the based on wireless mesh network access point that each terminal lays respectively at by each based on wireless mesh network access point or based on wireless mesh network gateway node to this network node.
7, as any described method of claim 3-6, it is characterized in that described routing information, is each based on wireless mesh network access point or the based on wireless mesh network gateway node topology information at based on wireless mesh network.
8, as any described method of claim 3-6, it is characterized in that described routing information, is each based on wireless mesh network access point or the based on wireless mesh network gateway node routing iinformation at based on wireless mesh network.
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| CNB2005100534565A CN100527671C (en) | 2005-03-10 | 2005-03-10 | Information updating method of radio network |
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| CNB2005100534565A CN100527671C (en) | 2005-03-10 | 2005-03-10 | Information updating method of radio network |
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| CN100527671C true CN100527671C (en) | 2009-08-12 |
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| CN100466576C (en) * | 2007-04-30 | 2009-03-04 | 深圳市深信服电子科技有限公司 | Method for reducing disposition VPN network through self-organization field |
| CN101827410B (en) * | 2009-03-04 | 2012-08-08 | 香港理工大学 | Switching method for wireless mesh network |
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Non-Patent Citations (1)
| Title |
|---|
| 拓展宽带接入的无线Mesh网技术. 姜红旗，康凯，林孝康.电信科学，第1期. 2005 * |
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