Cross-layer route optimization method and device for wireless Mesh network

A wireless link and routing technology, applied in wireless communication, electrical components, etc., can solve problems such as poor routing performance and inaccurate routing updates

Active Publication Date: 2012-03-21
ZTE CORP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method and device for cross-layer routing optimization of a wireless Mesh network, which sol

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  • Cross-layer route optimization method and device for wireless Mesh network
  • Cross-layer route optimization method and device for wireless Mesh network
  • Cross-layer route optimization method and device for wireless Mesh network

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[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0057] In order to overcome the shortcomings of frequent route maintenance and low resource utilization in the existing cross-layer technology, and solve the problem of not distinguishing channel states in the prior art. The channel state-based cross-layer routing optimization method of the wireless Mesh network of the present invention includes MAC layer retransmission control optimization and network layer cross-layer routing optimization, especially wireless network retransmission control and joint routing optimization based on IEEE 802.11 .

[0058] Through dynamic environment perception, adaptive retransmission is performed on data packets that fail to be sent due to conflicts or errors in the MAC layer. By judging the channel state, it can effectively percei...

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Abstract

The invention discloses a cross-layer route optimization method and a cross-layer route optimization device for a wireless Mesh network. The method comprises the following steps of: estimating the channel state of a current network according to the transmission efficiency parameter of a wireless link, judging the major cause of current packet loss according to a packet success ratio and a residual load rate when the channel state is poor, and adjusting the maximum retransmission time according to the packet loss cause; and acquiring the transmission efficiency PTEP of an entire route according to the transmission efficiency parameter of the wireless link, acquiring the residual load rate L-P of the route from which a source node and a target node are removed, computing the effective bandwidth etaB(c) of the route, constructing a route decision function according to the transmission efficiency PTEP of the route, the residual load rate L-P of the route and the effective bandwidth etaB(c) of the route, performing route discovery and route maintenance operation by using the route decision function, and selecting an optical packet transmission route between the source node and the target node. According to the invention, the route quality of an MAC (Media Access Control) layer can be sensed more accurately, and the error judgment times of the route are reduced.

Description

technical field [0001] The present invention relates to a wireless Mesh network (WMN: Wireless Mesh Network), in particular to a method and device for cross-layer routing optimization of a wireless Mesh network. Background technique [0002] Due to lower cost, flexible configuration, and enhanced network coverage and network capacity, Wireless Mesh Network (WMN: Wireless Mesh Network) technology has become more and more widely used, and its excellent performance has been favored by academia and industry. It has become a very promising new wireless networking technology emerging in the next generation wireless network. A wireless Mesh network is mainly composed of Mesh terminals and Mesh routers. Among them, each Mesh router constitutes the network architecture foundation and backbone network of the wireless network, and interconnects with the wired network to provide a multi-hop wireless Internet connection for the Mesh terminal. [0003] Traditional networks use a layered...

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Application Information

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IPC IPC(8): H04W40/12H04W40/24
Inventor 杨光宋建全赵海涛董育宁
Owner ZTE CORP
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