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Transmission method, communication device and communication system of wireless mesh networks

A wireless mesh network and transmission method technology, applied in wireless communication, network data management, electrical components, etc., can solve problems such as low transmission efficiency of the system, and achieve the effect of reducing the number of interactions, improving transmission efficiency, and high MAC data rate

Active Publication Date: 2013-03-27
SHANGHAI HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the research and practice of the prior art, the inventors of the present invention have found that since each node needs to resolve the IP packet header to determine the forwarding path address of the next hop node, it is necessary to communicate with the IP layer to complete an information transmission. Make multiple interactions, resulting in inefficient transmission of the system

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  • Transmission method, communication device and communication system of wireless mesh networks
  • Transmission method, communication device and communication system of wireless mesh networks
  • Transmission method, communication device and communication system of wireless mesh networks

Examples

Experimental program
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Embodiment 1

[0040] A transmission method of a wireless mesh network, after a node receives a media access control MAC frame, it can search a label path conversion table at the MAC layer according to the label of the MAC frame header to determine the forwarding path address of the next hop node, and can simultaneously Update the MAC frame header according to the record of the label-path conversion table, and then send the MAC frame that has updated the MAC frame header according to the forwarding path address of the next-hop node to the next-hop node; wherein, in order to save the overhead of the MAC layer, ensure that the system With a high MAC data rate, the CID originally carried in the service flow and the ID of the sending node, that is, the Node ID, can be used as labels.

[0041] Such as figure 1 As shown, the specific process can be as follows:

[0042] 101. Receive a media access control MAC frame;

[0043] 102. Search the label path conversion table located at the MAC layer acc...

Embodiment 2

[0049] It can be seen from the first implementation that the embodiment of the present invention uses CID and Node ID as the label of the MAC frame. Since each CID is unique, in order to reduce the complexity of using MPLS in the WMN, in the embodiment of the present invention, the The method adopted by MPLS that does not use label distribution, but uses the controller (Controller) and forwarder (Forwarder) structure, see figure 2 , wherein, the controller at the routing layer (that is, the Internet Protocol layer) is responsible for periodically updating the label-path conversion table located in the forwarder at the MAC layer through the IP routing table information of the IP layer. With the label conversion table of the MAC layer, the forwarder can determine the MAC address of the next-hop node at the MAC layer, without deciphering the IP packet header, and then interacting with the IP layer to determine the forwarding path of the next-hop node address. Such as figure 2...

Embodiment 3

[0096] In WMN, due to the instability of the wireless channel between nodes, or the temporary withdrawal of nodes from the network, it is usually difficult to maintain a relatively stable end-to-end path link like a wired network. However, if the path is restored, that is, when the next hop has a problem, the node is required to find the path again through the IP layer to solve this problem, and the delay requirement of some QoS services cannot be guaranteed.

[0097] Therefore, on the basis of Embodiment 2, one or more backup paths can be established while the main path is established, so that when the main path fails, it can be immediately switched to the backup path for transmission. In this way, the recovery path produces The delay will be reduced and the reliability of routing will be improved.

[0098] Similarly, before implementing this solution, it is necessary to add a controller and a repeater to each WMN network node. The difference from Embodiment 2 is that this e...

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Abstract

The invention discloses a transmission method, a communication device and a communication system of wireless mesh networks. In the embodiment of the invention, CID and Node ID are adopted as labels, and then a label path conversion table is established at an MAC layer, therefore, a node can search the label path conversion table positioned at the MAC layer to determine the forward path address of the next hop node according to the label of the MAC frame head after receiving the MAC frame and updates the MAC frame head and retransmits the updated MAC frame head according to the record of the label path conversion table, and the determination is performed without searching a routing table of an IP layer. By adopting the scheme, the interaction number with the IP layer can be reduced, and the transmission efficiency of the system in a WMN is enhanced. Because the scheme adopts original CID and node ID in a service flow as the labels, too much extra expense is not added to the MAC layer, and the scheme is beneficial to ensuring the system to have a higher MAC data rate.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a transmission method, communication equipment and a communication system of a wireless mesh network (WMN for short). Background technique [0002] WMN is a new type of broadband wireless network. It can be composed of multiple subscriber stations (SS for short), that is, mobile terminals, or a backbone network composed of multiple base stations (BS for short). It provides high-connectivity and robust access services in a wide range, and can also integrate other wireless networks through a mesh (Mesh) gateway. All nodes in the network have equal status, and there is no need to set up any central control node. All nodes in the network have the ability to forward packets, that is, they have the function of routers. When a node wants to communicate with nodes outside its coverage range, it needs multi-hop (Multi Hop) forwarding of intermediate nodes, so it is also ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W8/08
Inventor 庄宏成张峻恺冯穗力叶梧
Owner SHANGHAI HUAWEI TECH CO LTD