Study On A Routing Protocol Of Wireless Mesh Network Based On Cross-layer Design

Nowadays,Internet has deeply immerged into People's work,study,daily life and other aspect.Wireless Lan(WLAN) has become incapable of meeting People's grwoing demand on wireless broadband Internet access.In such situation,Wireless Mesh Network(WMN) comes out. With lots of incomparable advantages,WMN has aroused widespread concern and is considered as an important part of the next generation of Internet technology.In recent years, WMN has achieved rapid development and many successful business applications.However,it is also constrained by many technical bottlenecks,in which routing technology is the most important one. Many technical characteristics and advantages of WMN originate from Mesh muti-hop routing.Therefore, the study and design of routing protocol is an important subject in WMN technology.Currently, the standards of routing protocol for WMN has not yet been established. The traditional routing protocol for wired Internet can not be applied to multi-hop wireless networks such as WMN. Although Mobile Ad hoc Network(MANET) is similar to WMN, routing protocol for MANET could not fully apply in WMN because of its own characteristics. Besides, in order to satisfy the requirements of WMN such as load balancing,fault-tolerant,network capacity and so on, applications such as using cross-layer design,multi-path routing become important subjects in routing protocol design for WMN.In accordance with the requirements of routing protocol design for WMN,we analyse the deficiencies of DSR when apply in WMN,adopt cross-layer design to improve DSR. Finally,we design a routing protocol CMRP(Cross-layer Multi-path Routing Protocol),which has load balancing,congestion avoidance mechanism and could afford multi-path routing. And the routing rule is measured by PFDR.Analysis and simulation results show that when using CMRP, comparing with using original DSR, the network throughput double while the corresponding delay,jitter reduce to merely one-third. CMRP has greatly upgraded the network performance, fits for WMN.