Review on QoS aware Improved AODV Routing Protocol in Wireless Mesh Network Mr. RAHUL SURYAWANSHI G. H. Raisoni Collage of Engineering Nagpur, India rs.nagpur022@gmail.com Ms. S. U. NIMBHORKAR G. H. Raisoni Collage of Engineering Nagpur, India sonali.nimbhorkar@raisoni.net Abstract—Wireless Mesh Network (WMN) is emerging concept in wireless networks supporting broadband and high speed multimedia services, so network must guaranteed the Quality-of-Services (QoS). Wireless mesh network characterized by multihop wireless connectivity and frequently changing network topology therefore required efficient and optimal dynamic routing protocols with node authentication for preventing data form networking attacks. AODV is commonly used routing matrix for path discovery in Ad-hoc network. So that, implementing in wireless mesh network, AODV should improve for find optimal shortest path. In this paper, the QoS aware improved AODV routing protocol in wireless mesh network with the node authentication schemas has been discussed. Keyword—Wireless mesh network (WMN); AODV; routing protocol; node authentication. I. INTRODUCTION The Wireless Mesh Networks referred as WMN is an emerging concept in wireless communications network. The integration of WMNs with other networks such as the cellular network, Internet, IEEE 802.11, sensor networks, etc., can be accomplished in the mesh network through the gateway and bridging functions. In WMNs, nodes are comprised of mesh routers and mesh clients. Each node operates as a host as well as a router, forwarding packets on behalf of other nodes which may not be within the direct wireless transmission range of their destinations. Mesh clients either be stationary or mobile, and can form a client mesh network among themselves via mesh routers. WMNs are anticipated significantly to resolve the limitations and improve the performance of ad hoc networks, Wireless LANs and wireless metropolitan area networks. There are two major problems with WMN. First, as shown in figure 1, wireless mesh network is infrastructure based multihoping network, so that security schema available for wireless sensor network is not fully applicable and second optimal shortest path discovery for data communication. Also, various multimedia and real-time applications are expected to be introduced by WMN in the future while implement these services; Quality-of-Service (QoS) of the network must be garmented. AODV is most widely used routing protocol in wireless networks because of the advantages of rapid convergence, small computation, and self-repair property. One distinguishing feature of AODV is its use of a destination sequence number for each route entry. The requesting nodes receives the destination sequence number along with the route information through it will communicate [18]. However, AODV measures route only by the number of hops and the destination node deals with the routing request packet (RREQ) first arrives. It isn’t a QOS routing protocol [1]. Those characteristics don’t satisfy the integrated requirement of some services which demand dynamic requirements on multi- target performance (such as delay, bandwidth, few congestion and high QOS). Figure 1 Infrastructure/backbone WMNs [6] Also, due to large number of nodes in wireless mesh network. It is difficult to identify the destination node and avoid networking attacks like man-in-middle, reply attack and cloning attack. Security can be achieved by some cryptographic techniques such as AES, DES, RSA and ECC, but node identification is challenging task in wireless mesh network. This paper provides review of security and optimal path parameters in ad-hoc and sensor network. Which provides a better performance while implementing in wireless mesh network. Section II represents the reviews on QoS based routing algorithm and node authentication schemes in wireless network and at the end section III we conclude on study. 978-1-4673-5090-7/13/$31.00 ©2013 IEEE 613