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A Reliable Low-Overhead MAC Protocol for Multi-Channel Wireless Mesh Networks

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3 Author(s)
Hairong Zhou ; Queen''s Univ., Kingston ; Chihsiang Yeh ; Mouftah, H.T.

This paper proposes a multi-channel medium access control (MAC) protocol for wireless mesh networks (WMNs) by using busy tones to prevent data packet collisions at data channels. Multi-channel MAC schemes can achieve higher network throughput than single channel MAC schemes in multi- hop wireless networks. It is especially appealing to exploit multiple channels in WMNs which has high capacity requirement to support backbone multimedia applications. Most previously proposed MAC protocols make use of the RTS/CTS mechanism to deal with data packet collisions caused by exposed/hidden terminal problems in multi-hop environment. However, when multiple channels are used for data transmissions, the traditional RTS/CTS mechanism can no longer handle the exposed/hidden terminal successfully. By investigating the special features of WMN architecture, we apply the busy tone solution into the medium access control mechanism for WMNs, in which mesh nodes have no limit on power consumption. In this paper, we clearly presented the idea and operation of our proposed multichannel MAC protocol for WMNs. Comprehensive simulations are conducted to investigate the effects of various factors on the system performance. Also, the performance of our proposed mechanism is compared with that of previous RTS/CTS-based MAC protocols.

Published in:

Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE

Date of Conference:

26-30 Nov. 2007

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