PR-MAC: a practical approach for exploiting relay transmissions in multi-rate WLANs

Authors:
Wan-Seon Lim;Dong-Wook Kim;Young-Joo Suh
Affiliations:
Department of Computer Science and Engineering, Pohang University of Science and Technology, Pohang, Korea;Department of Computer Science and Engineering, Pohang University of Science and Technology, Pohang, Korea;Department of Computer Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
Venue:
IEEE Transactions on Wireless Communications
Year:
2010

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Abstract

In this paper, we propose a new MAC protocol, called proxy relay-enabled MAC (PR-MAC), to improve the capacity of multi-rate WLANs. PR-MAC introduces a new entity called Proxy Relay Point (PRP), which serves as a relay between the AP and stations. The cooperation of the AP with PRP replaces direct transmissions for low-rate stations with fast two-hop transmissions while the stations think that they communicate directly with the AP. Our experiment and simulation results showed that PR-MAC can significantly improve the throughput of legacy stations without any modification on the MAC operation of the stations.