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http://dx.doi.org/10.7840/KICS.2011.36A.9.801

Design and Implementation of Multi-rate Broadcast based Link Quality Measurement for WLAN Mesh Network  

Lee, Duck-Hwan (부산대학교 컴퓨터공학과 이동통신 연구실)
Yang, Seung-Chur (부산대학교 컴퓨터공학과 이동통신 연구실)
Kim, Jong-Deok (부산대학교 컴퓨터공학과 이동통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.9A, 2011 , pp. 801-808 More about this Journal
Abstract
We propose MBAP(Multi-rate Broadcast Active Probing) technique to get the right measurements for link quality in Wireless Mesh Network (WMN). Most routing protocols for WMN make use of link quality-aware routing metrics, such as ETX(Expected Transmission Count) and ETT(Expected Transmission Time), while the hop count is usually used in MANET (Mobile Ad-hoc NETwork). A broadcast based active proving technique is adopted in the previous studies to get the ETX or ETT of a link. However this technique does not reflect the multi-rate feature of WLAN because it uses a single fixed transmission rate for broadcast which usually differs from the actual rate used in data transmissions. MBAP overcomes this shortage by exploiting various rate broadcast frames for probing. We implement MBAP on linux system by modifying WLAN driver and related kernel sub-systems. Experimental results show that MBAP can capture link quality more accurately than the existing techniques.
Keywords
MBAP; BAP; Wireless Mesh Network; Link Quality; Metric;
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