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: | 1-一月-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 |
顯示於類別: | 期刊論文 |