Channel Assignment with User Coverage Priority and Interference Optimization for Multicast Routing in Wireless Mesh Netw
In order to improve multicast performance in wireless mesh networks, we consider both multicast tree construction and channel assignment in this paper. To maximize the possibility of providing good service to the users, we treat the user coverage of each
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School of Software, Central South University, Changsha, China {fengzeng,czg}@csu.edu.cn 2 Department of Computer Science, Missouri State University, Springfield, USA [email protected] Department of Computer Science, New York Institute of Technology, New York, USA [email protected]
Abstract. In order to improve multicast performance in wireless mesh networks, we consider both multicast tree construction and channel assignment in this paper. To maximize the possibility of providing good service to the users, we treat the user coverage of each destination as the top priority in channel assignment. In addition, we propose the multicast tree constructing algorithm (namely CIOMT) and channel assignment algorithm with the name CIOCA. In the CIOMT algo‐ rithm, each destination selects the minimum interference path to the constructing tree and joins into the constructing tree. For QoS consideration, the source-todestination hop count is up bounded. In the CIOCA algorithm, the nodes are assigned the sending channels by the descending order of priority. During the channel assignment process, the channel with minimum interference to the whole tree will be selected and assigned to the corresponding interfaces. Simulation results have shown that the proposed solution outperforms the other existing algorithms. Keywords: Wireless mesh network · Multicast · Channel assignment · Interference
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Introduction
Wireless Mesh Network (WMN) is an important technology for “last mile” Internet access [1]. In the WMNs, there are three types of nodes, namely client, mesh router and gateway. The mesh routers and gateways are often static and form a wireless mesh backbone. The clients access the wireless mesh backbone through its associated mesh router, and visit the Internet via gateways finally. Consequently, in a WMN, wireless mesh backbone plays a key role in packets transmission directed to/from the Internet, and has an important impact on the network performance. Traditionally, in wireless mesh backbone, each node has one radio, and all nodes share and compete for only one channel. Due to the interference among links trans‐ mitting simultaneously, the capacity and QoS of the network are severely limited [2]. © Springer International Publishing Switzerland 2016 Q. Yang et al. (Eds.): WASA 2016, LNCS 9798, pp. 560–570, 2016. DOI: 10.1007/978-3-319-42836-9_49
Channel Assignment in Wireless Mesh Networks
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To solve this issue, an effective approach is to equip each node with multiple interfaces, and the nodes could transmit packets simultaneously with multiple channels. With appropriate channel assignment, interference can be greatly reduced [3]. As we all know, multicast is a useful technology in Internet, especially to some network applications such as online video, p2p transmission and so on. Due to the importance of multicast and the effectiveness of multi-interface multi-channel tech‐ nology, we should develop the proper channel assignment strategy for multicast in WMNs, and improve the multicast performance. In this
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