Research On Hybrid Routing Protocol In Wireless Mesh Networks

WMN(Wireless Mesh Networks)is a kind of distributed networks with high speed and large capacity, a broadband wireless networking technology that is a new solution to the"Last Mile"issue. It is capable of self-organization and self-configuration by supporting multi-hop packet routing and forwarding. Wireless routing protocol, as one of its key technologies, performs great function on the optimization of network performance. Hence this thesis is about the study and improvement of routing algorithm in WMN.Firstly, the basic knowledge of WMN including system structure, feature, standardization, application paradigms and developments are introduced, the principal and performance of some existing routing protocols are analyzed and compared with their deficiencies pointed out, and then the general research routine of WMN and several related research results of different procedures are analyzed. Afterwards, detailed explanations of some typical routing protocols such as DSDV, DSR and AODV in mobile Ad hoc networks are put forward through analysis on their advantages and disadvantages.Based on the above, according to the structure and data stream characteristics of backbone WMN, a novel routing protocol HMR(Hybrid Mesh Routing)with a hierarchy structure is given out, which intends to strike a balance between improved delay performance and lower overhead activities by combing the feature of both proactive and on demand routing protocols. In the layered WMN, mesh routers form an infrastructure of WMN and provide wireless access for mesh clients. While with the gateway functionality, the whole network can be connected to the Internet.Finally simulations are worked out through NS2 software. Simulation results demonstrate that the proposed algorithm has better performances than pure classic routing protocols on average packet delivery ratio, end-to-end delay and normalized routing load, it's more applicable and efficient for WMN.