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Channel Assignment in Wireless Mesh Network with Multi-radio and Multi-channel

Author: ShenDongDong
Tutor: DengFeiQi
School: South China University of Technology
Course: Systems Engineering
Keywords: Wireless Mesh Networks Systems Engineering Multi-radio multi-channel Channel allocation Network capacity
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 203
Quote: 1
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Wireless Mesh Network (WMN, Wireless Mesh Network) With the rapid development of wireless communication technologies and the emergence of a new type of network, as one of the \The WMN Because of its high value and broad application prospects, has become a hot research. Which channel resource allocation and management capacity of wireless Mesh network performance optimization plays a very important role, and the use of multi-radio multi-channel is the most effective way to solve this problem. Network capacity issues as to improve wireless Mesh network research direction, research network model and multiple RF channels allocated to improve network capacity. The methods and procedures of the mathematical tools of mathematical programming and map the network system science technology based on system analysis and system modeling and network planning method is a concrete manifestation of the system of science in engineering technology. WMN channel assignment problem relates to the network, the application of systems engineering theory and methods from the visit on the overall analysis and research, thus the \Channel allocation to meet network connectivity premise by the binding of the inter-node RF and RF channel binding and RF channel switching strategy, the formation of a data communication network optimization structure. In addition, the channel allocation by topology control, directional antennas, smart antenna technology to achieve. This paper introduces a Wireless Mesh Network channel allocation concept, and they affect the performance of wireless Mesh network. Based on the multi-radio wireless mesh network architecture, summarize and draw on the existing algorithms based on a centralized channel allocation algorithm. The algorithm fully consider the actual network implementation can be achieved as well as consistent with the existing 802.11s protocol compatibility, consider reducing interference while fully consider the balance link load and link capacity. The channel assignment algorithm first control of the network topology, to simplify the network topology, and determines the priority of the network node, then the specific channel assignment based on the priority of the node. Through the establishment of a centralized control channel adjustment and network recovery strategy to do a better guarantee of network connectivity and stability. NS2 network simulation platform in a variety of network scenarios through simulation experiments of the proposed channel allocation algorithm performance assessment. The simulation results show that the network capacity centralized channel assignment algorithm based on topology control performance improved significantly, it is an effective algorithm.

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