Hidden node aware routing method using high-sensitive sensing device for multi-hop wireless mesh network
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RESEARCH
Open Access
Hidden node aware routing method using highsensitive sensing device for multi-hop wireless mesh network Shamsad Parvin* and Takeo Fujii
Abstract Throughput maximization is one of the main challenges in multi-hop wireless mesh network (WMN). Throughput of the multi-hop WMN network seriously degrades due to the presence of the hidden node. In order to avoid this problem, we use a combination of the high-sensitive sensing function and beacon signalling at the routing. The purpose of this sensing function is used to avoid the hidden node during route formation in the self flow. This function is considered to construct a route from the source node to the destination node without any hidden node. In the proposed method, high-sensitive sensing device is utilized in both route selection and in the media access. The accuracy of our proposed method is verified by numerical analysis and by computer simulations. Simulation results show that our proposed method improves the network performance compared with the conventional systems which do not take account of the hidden node. 1 Introduction Wireless Mesh Networks (WMN) are emerging as a new attractive communication paradigm owing to their low cost, easy maintenance and rapid deployment. The application scenarios for WMN include wireless broadband internet access, intelligent transportation systems, transient networks in convention centers, and disaster recovery. In WMNs, nodes are comprised mesh routers and mesh clients [1]. Wireless mesh routers are interconnected as a multi-hop backbone to provide mesh clients, network access. As shown in Figure 1, among all mesh routers, some have client connectivity (mesh access points), and some have internet gateway capability. The mesh backbone then supports multi-hop communication among mesh routers. WMNs are dynamically self-organized and self-configured, with the nodes in the network automatically establishing and maintaining mesh connectivity among themselves and compatible with conventional WLAN. Many research challenges still remain open in the design of the WMNs [1,2]. Routing in multi-hop WMNs has been a hot research area in recent years, with the objectives to * Correspondence: [email protected] Advanced Wireless Communication Research Center (AWCC), The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585, Japan
achieve as high throughput as possible over the network [3,4]. Typically, the source and the destination nodes for a particular data packet are not within direct communication range. This leads to a multi-hop scenario where the packet must be routed and forwarded through other nodes in the network on the way to the destination nodes. Many routing protocols have been studied for sending data from the source node to the destination node [5,6]. These protocols ignore the Effect of the hidden node problem. The hidden node is related to the Transmission range, Carrier sense range and Interference range of a station [7,8]. The hidden nodes refer to the nodes within the
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