Enhanced rate adaptation schemes with collision awareness

Authors:
Seongkwan Kim;Sunghyun Choi;Daji Qiao;Jongseok Kim
Affiliations:
School of Electrical Engineering and INMC, Seoul National University, Korea;School of Electrical Engineering and INMC, Seoul National University, Korea;Department of Electrical and Computer Engineering, Iowa State University;National Defense and Communications Institution, Korea
Venue:
NETWORKING'07 Proceedings of the 6th international IFIP-TC6 conference on Ad Hoc and sensor networks, wireless networks, next generation internet
Year:
2007

Citing 1
Cited 1

Robust rate adaptation for 802.11 wireless networks

Proceedings of the 12th annual international conference on Mobile computing and networking

Collision-Aware Rate Adaptation in multi-rate WLANs: Design and implementation

Computer Networks: The International Journal of Computer and Telecommunications Networking

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Abstract

While many existing rate adaptation schemes in IEEE 802.11 Wireless LANs result in severe throughput degradation since they do not consider the collision effect when selecting the transmission rate, CARA (Collision-Aware Rate Adaptation) [1] shows improved system performance thanks to its collision-awareness capability. In this paper, we propose two enhancements to the original CARA scheme to further improve the system performance. The first one is called CARA-RI, which extends CARA's collision-awareness capability in making rate increase decisions, while the second one, called CARA-HD, incorporates a hidden station detection mechanism. Simulation results show that the proposed schemes outperform the original CARA significantly under various randomly-generated network topologies.