International Journal of Advanced Research in Electronics and Communication Engineering (IJARECE) Volume 3, Issue 9, September 2014 Fault Node Recovery Algorithm for a Wireless Mesh Networks Kumara Swamy H.N, Nirmalkumar S. Benni 1004 ISSN: 2278 – 909X All Rights Reserved © 2014 IJARECE Abstract – The main purpose of mesh networks is the capability of working without infrastructure. During the function, the wireless mesh network may suffer from frequent node failure which degrades the operation of network. Node failure detection and node recovery is very essential in performance of Wireless Mesh Network. The proposed work gives a various techniques used for detection of node failure and the techniques used for node recovery of Wireless Mesh Network. The work proposed uses a fault node recovery algorithm in order to enhance the lifetime of a Wireless Mesh Network when some of the nodes shut down. Index Terms – Wireless Mesh Network (WMN), Node failure, Node Recovery. I. INTRODUCTION As various wireless networks has evolved into the next generation in order to give a better services, a key technology called Wireless Mesh Networks (WMNs), has evolved recently. In WMNs, nodes are comprised of mesh routers and mesh clients [2]. All the nodes in WMN are not only operates as a host but also operates as a router to forward packets on behalf of other nodes that may not be in direct wireless transmission range of their destinations. WMN is a optimistic wireless technology for many applications such as broadband home networking, community and neighborhood networks, enterprise networking, building automation etc. It provides security at great attention as a possible way for cash strapped Internet Service Providers (ISPs), carriers and others to roll out robust and reliable wireless broadband service access in a way that needs minimal advance investments. With the capability of self-organization and self- configuration, WMN can be deployed incrementally, one node at a time, as needed [16]. As, the number of nodes installed are increased, the reliability and connectivity for users also rapidly increases. Also, the intension of deploying WMNs is to do something as reliable and affordable access networks in underdeveloped regions. WMNs have gained importance because of fast deployment, easy maintenance and low cost of investment when compared to traditional wireless networks. __________________________________________________ Manuscript received Sep, 2014. Kumara Swamy H N, Department of Electronics & Communication Engineering, REVA University Bangalore, India. Nirmalkumar S Benni, Department of Electronics & Communication Engineering, REVA University Bangalore, India. The aim of deploying WMN is to design a network with low-cost access initiative (often by ISPs) to aid the development of communities. In WMN, as mesh routers are added, the coverage area and robustness of network also increases. The advantages of WMN consistently motivate researchers to study their features for better performance. Contemporarily, there are two variations of mobile wireless networks. First type is “infrastructure network”. It is a fixed network with wired gateways. Base stations acts as the bridges for these networks. The applications of this type of networks include office local area network (LAN) The second type is “infrastructure-less network”. On the other side this network is also called as “self-organized networks”. Usually these networks have mobile radio nodes. Therefore, there is no need of having an existing network infrastructure or central system management. In case of requirement of immediate infrastructure, these networks can be opted which are very suitable. Fig.1. Wireless Mesh Network Fig.1 shows how WMN functions, by sharing an internet connection across Local Area Network (LAN). As shown in Fig.1, only one node in WMN is more sufficient to directly wired to the internet. Nearest cluster of nodes will collect the internet connection from the node which is directly having wired connection with internet, i.e., wired node shares internet connection to nearest cluster of nodes. Then the process repeats from one cluster of nodes to other nearest cluster of nodes and so on. It is not necessary to have every individual node to have wired connection with anything. There is a necessity of power supplies such as batteries, AC plugs and if it is outdoor, then solar panels are needed. The nodes which are placed outdoor should be enclosed with waterproof protective shield and can be placed anywhere including roofs, pools, telephone, etc. WMNs provide more effective sharing in internet connectivity because as more number of nodes installed, it helps the signal to travel further. As number of nodes increase in the network, internet connection for the user becomes faster and stronger.