標題: Utilizing Multiple Channels With Fewer Radios in Wireless Mesh Networks
作者: Ku, Chia-Yu
Lin, Ying-Dar
Tsao, Shiao-Li (Charles)
Lai, Yuan-Cheng
交大名義發表
資訊工程學系
National Chiao Tung University
Department of Computer Science
關鍵字: Channel switching;IEEE 802.11s;multichannel;multiradio;wireless local area networks (WLANs);wireless mesh network (WMN)
公開日期: 1-Jan-2011
摘要: Wireless mesh networking (WMN) is regarded as a low-cost technology for rapid wireless network deployment. However, in a single-channel WMN, the overlapped transmission ranges between relaying mesh points could introduce serious interference. Using multiple radios over multiple channels can decrease the interference and improve the capacity of a WMN, but it increases the cost of a mesh point. One possible solution to balance between interference, hence performance, and cost is utilizing fewer radios that switch among multiple channels instead of using per-channel radios. In this paper, we propose a channel-switching method, called the traffic-aware switching scheme (TRASS), for a mesh point with a limited number of radios. TRASS utilizes the existing IEEE 802.11 mechanisms, i.e., hybrid-coordination-function-controlled channel access and power saving, to avoid packet loss during channel switching. A TRASS mesh point monitors the occupied channel time to schedule radios that switch among channels. The implemented TRASS demonstrates 75% throughput improvement by (2, 1), i.e., two-channel single-radio, over (1, 1). (3, 2) and (3, 1) achieve 69.8% and 39.7%, respectively, of the throughput of (3, 3) in the simulated TRASS.
URI: http://dx.doi.org/10.1109/TVT.2010.2090915
http://hdl.handle.net/11536/26110
ISSN: 0018-9545
DOI: 10.1109/TVT.2010.2090915
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 60
Issue: 1
起始頁: 263
結束頁: 275
Appears in Collections:Articles


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