A cross-layer approach to channel assignment in wireless ad hoc networks

Authors:
Michelle X. Gong;Scott F. Midkiff;Shiwen Mao
Affiliations:
Cisco Systems, Inc., San Jose, CA;The Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA;Department of Electrical and Computer Engineering, Auburn University, Auburn, AL
Venue:
Mobile Networks and Applications
Year:
2007

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Abstract

To improve the capacity of wireless ad hoc networks by exploiting multiple available channels, we propose a distributed channel assignment protocol that is based on a cross-layer approach. By combining channel assignment with routing protocols, the proposed channel assignment protocol is shown to require fewer channels and exhibit lower communication, computation, and storage complexity than existing channel assignment schemes. A multi-channel MAC (MC-MAC) protocol that works with the proposed channel assignment protocol is also presented. We prove the correctness of the proposed channel assignment protocol. In addition, through a performance study, we show that the proposed protocol can substantially increase throughput and reduce delay in wireless ad hoc networks, compared to the IEEE 802.11 MAC protocol and an existing multi-channel scheme.