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An efficient association of a mobile client in wireless mesh network

Wireless Mesh Network (WMN) is an upcoming technology that supplements wired infrastructure with wireless backbone to provide Internet connectivity to mobile nodes (MN) or users in residential areas and offices. Here the each wireless backbone node operates both as a wireless router that forwards packets of other nodes & as a wireless bridge transmitting the packets of its clients WMN has the potential to deliver Internet broadband access, wireless local area network coverage and network connectivity for stationary or mobile hosts at low costs both for network operators and customers The core technology is based on routing packets in multihop fashion. In recent years, wireless mesh networks (WMN) together with related applications and services, have been actively researched. New applications include digital home, broadband, and wireless home Internet access, community and neighborhood networking, enterprise networking, metropolitan area networks, building automation, health and medical systems, public safety and security surveillance systems, intelligent transportation systems, emergency and disaster networking, etc. Generally speaking, a WMN is a group of self-organized and self-configured mesh clients and mesh routers interconnected via wireless link There are various routing protocols available for Wireless mesh network (WMN)The most popular ones are DSR, AODV and DSDV. In this thesis, an attempt has been made to compare these three protocols on the performance basis under different environments. The comparison has been done under two protocols namely UDP and TCP. The tools used for the simulation are NS2 which is the main simulator, NAM (Network Animator) and Tracegraph which is used for preparing the graphs from the trace files. The results presented in this thesis work clearly indicate that the different protocols behave differently under different environments. The results also illustrate the important characteristics of different protocols based on their performance and thus suggest some improvements in the respective protocols.