Research Of Communication Reliability Optimization Problems For Mesh Network

With the development of Mobile Ad Hoc Networks, Wireless Mesh Networks are commonly used in military, industrial, life and other areas. It is the new broadband wireless network with multi-hop, self-organization and self-healing features. With its low cost, high ductility and strong fault recovery performance, networking flexible, convenient maintenance characteristics shows Mesh Network has the broad application prospect. And network reliability is an important measure of network performance indicator. Therefore, Wireless Mesh Network communication reliability optimization becomes widely, hot issues.In this thesis, through master Wireless Mesh Network architecture, communications theory and its characteristic, research the problem of low reliability caused by network congestion for wireless Mesh network in communication process. Analyse the causes of congestion and the influence of network communication. From two sides consider the routing ability of node:node congestion degree and node saturation. Node congestion degree weighs the node cache used degree. Node saturation weighs the ability to process information. Combining transmission task priority, give indegree shunt routing strategy to make communication node can actively and selectively "against" over its routing capabilities of the transmission task. Set up Mesh Network communication reliability optimization model. Through the example simulation, results show that through node congestion degrees coordination, using indegree shunt routing strategy can effectively make the network communications tasks to avoid the bottleneck for transmission. From the results, the optimized network can improve network bottlenecks congestion problem and make the network flow distribution more balanced and network resources more reasonable.In addition, under certain degree of the Mesh network congestion, in order to improve the utilization rate of node cache in the case of limited network resources, change the influence way of cache to make data transfer to intermittent peak. Give multi-peak regulation strategy. Set up Multi-objective optimization model based on multi-peak regulation strategy. Under the VC environment using artificial immune algorithm for example simulation, results show that multi-peak regulation strategy effectively improve Mesh Network communication performance. Data transmission efficiency is improved by an average of 5.5%. To ease the congestion this method plays a positive role.