A distributed coordination scheme to improve the performance of IEEE 802.11 in multi-hop networks

Authors:
Fengji Ye;Haiming Yang;Hua Yang;Biplab Sikdar
Affiliations:
Cisco Systems, San Jose, CA;Cisco Systems, Milpitas, CA;Intel Corporation, Shanghai, P. R. China;Department of ECSE, Rensselaer Polytechnic Institute, Troy, NY
Venue:
IEEE Transactions on Communications
Year:
2009

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Abstract

This paper investigates the performance of IEEE 802.11 in multi-hop scenarios and shows how its aggressive behavior can throttle the spatial reuse and reduce bandwidth efficiency. An adaptive, layer-2, distributed coordination scheme for 802.11 using explicit medium access control (MAC) feedback is then proposed to pace the transmissions on adjacent nodes, thereby assisting the MAC protocol to operate around its saturation state while minimizing resource contention. Simulation results show that the proposed scheme outperforms the original 802.11 MAC.