IOSR Journal of Engineering (IOSRJEN) e-ISSN: 2250-3021, p-ISSN: 2278-8719 Vol. 3, Issue 2 (Feb. 2013), ||V3|| PP 05-09 www.iosrjen.org 5 | P a g e Dynamic Channel Allocation for effective self Reconfigurable wireless mesh network Avinash Devare 1 , R.V.Mulajkar 2, 1 (ME student SCOE Vadgone, Pune) 2 (ME Student GECA Aurangabad) ABSTRACT : Wireless Mesh Networks (WMNs) consist of mesh routers and mesh clients for their lifetime, multihop wireless mesh networks (WMNs) experience frequent link failures caused by channel interference, dynamic obstacles, and/or applications’ bandwidth demands. Dynamic channel allocation for effective autonomous network reconfiguration system (E-ARS), by analyzing E-ARS, it shows that by using E- ARS alone it won’t provide a sufficient result such as network quality, leader assigning problems etc, so in order improve the network performance we going to implement a new concept Breadth First Search Channel Assignment (BFS-CA) algorithm against with E-ARS so that it will multi radio configuration for mesh network and channel assignment problems. We demonstrate our solution’s through the evaluation of a prototype implementation in an IEEE 802.11 in ns2. We also report on an extensive evaluation via simulations. In a sample multi-radio scenario, our solution yields performance more gains compared E-ARS. Keywords: IEEE 802.11, multiradio wireless mesh networks (mr-WMNs), E-ARS, BFS-CA networks, wireless link failures. I. INTRODUCTION Wireless Mesh Network is growing very widely now a day. It is used in various applications such as public safety. Even though many solutions for WMNs to recover from wireless link failures have been proposed, they still have limitations as follows. First Autonomous reconfigurable system (ARS) outperforms existing failure-recovery methods, such as static greedy channel assignments, and local rerouting. Second load on channel vary over time. To achieve our goals then the existing work E-ARS, we propose, a new concept Breadth First Search Channel Assignment (BFS-CA) algorithm against with E-ARS so that it will multi radio configuration for mesh network and channel assignment problems. To sense and evaluate the current channel conditions, our network includes dynamic channel sensor nodes for multi-radio dynamic configuration. The dynamic channel detection sensors monitor and record the traffic on each channel. Using this technique BFS- ARS network with E-ARS, we show the performance of some experiments to determine the best set of properties about each different channel to be able to rank all available channels in terms of achievable performance. We can then build a dynamic channel allocation using ARS algorithm that will, according to the appropriate set of properties about the current channel utilization, choose and dynamically assign the best channel for the links in our wireless mesh network. A comprehensive performance study that shows significant throughput improvements in the presence of varying interference levels, which are validated through empirical measurements on a prototype implementation. Wireless mesh network consist of mesh router, mesh client, gateway. Functionality of mesh router is to forward packet (traffic) to and from gateway which is connected to internet. Mesh client is nothing but your laptop or mobile. Gateway is one of entry or exit point from one network to another. In section I we define motivation for our project and II drawbacks of existing system. Section III explains scope of our project. In section IV we have explained Literature review, architecture of system and finally conclusion. II. MOTIVATION The channel assignment algorithm we propose in this paper is designed for wireless mesh networks. Routers in such networks are stationary. Whereas, user devices, such as laptops and PDAs, can be mobile. Such devices associate with routers. In ARS there is a leader node which is chosen by group member so whenever link failure occurs that information is given to the leader node. Leader node forward that information to gateway and all the functionality (like routing planning, reconfiguration) performed at gateway and send back to leader node. Finally, all nodes in the group execute the corresponding configuration changes. The main drawback of dynamic channel assignment is that it results into change in network topology, so to avoid this solution is that make mandatory one radio of mesh router to operate on default channel. This default radio is of the same physical layer technology IEEE 802.11a, 802.11b or 802.11g. A second drawback