Channel Assignment Strategy for Wireless Mesh Network Based on Topology-division
Yan Jun-rong①; Zhang Shun-yi①; Long Hua②; Sun Yan-fei①
①Institute of Information Networks technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; ②Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650051, China
Abstract：According to the characteristics of tree-topology aggregating traffic of wireless mesh network, this paper proposes a channel assignment strategy based on topology-division. Considering the effect of interference on different links, wireless interference is classified into vertical and horizontal interferences with determinate directions. An algorithm is proposed to divide the network topology into hop-by-hop subtopologies along the vertical interference. A channel assignment strategy for subtopologies is proposed including minimum channels to avoid vertical interference and additional channels to enhance the minimum throughput subtopology. A method is proposed based on channels to partition horizontal interference with channels within a subtopology. The collision domains within a subtopology and network performance bottleneck are analyzed, and the throughput and the order of channels assignment are simulated. The simulation results show that the proposed channel assignment strategy could effectively assure and enhance network throughout, and the method of horizontal interference partitioning outperforms the common channel framework multichannel mechanism defined in 802.11s.
2009, Vol. 31 
