Author(s)

Jukka SUHONEN, Timo D. HAMALAINEN, Marko HANNIKAINEN

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This paper presents an add-on Class of Service (CoS) layer for wireless mesh networks. The proposed protocol is applicable for contention-based MACs and is therefore compatible with most of the Wireless Local Area Network (WLAN) and Wireless Sensor Network (WSN) protocols. The protocol has a locally centralized control for managing data flows, which either reserve a fixed bandwidth or are weighted by fair scheduling. The protocol reduces transmission collisions, thus improving the overall throughput. IEEE 802.11 adhoc WLAN has been taken as a platform for simulations and prototyping for evaluating the protocol performance. Network Simulator Version 2 (NS2) simulations show that the CoS protocol efficiently differentiates bandwidth, supports bandwidth reservations, and reaches less than 10 ms transfer delay on IEEE 802.11b WLAN. Testing with a full prototype implementation verified the performance of the protocol.

Wireless LAN, Wireless Sensor Network, Scheduling, Traffic Control (Communication), Quality of Service

J. SUHONEN, T. D. HAMALAINEN and M. HANNIKAINEN, "Class of Service Support Layer for Wireless Mesh Networks," International Journal of Communications, Network and System Sciences, Vol. 3 No. 2, 2010, pp. 140-151. doi: 10.4236/ijcns.2010.32021.