Collision avoidance multi-rate MAC protocol: solving performance anomaly in multi-rate network

Authors:
Jung-Te Sung;Chih-Heng Ke;Naveen Chilamkurti;Yueh-Min Huang
Affiliations:
National Cheng Kung University, Taiwan;Nationai Kinmen Institute of Technology, Taiwan;La Trobe University, Victoria, Australia;National Cheng Kung University, Taiwan
Venue:
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
Year:
2009

Citing 2
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Abstract

Fading is one of the common characters of a wireless channel. Many rate adaptation mechanisms were proposed to enhance the IEEE 802.11 systems, but these may cause multiple rates in a single network. However, IEEE 802.11 DCF faces the performance anomaly in multi-rate network, that is, when the stations with different rates collide, the low-rate station will greatly degrade the high-rate station. In this paper, we propose a collision avoidance multi-rate MAC (CAMR-MAC) protocol, which is different from the current solutions for performance anomaly. Current performance anomaly solutions are to assign different priorities to stations with different rates based on the IEEE 802.11 DCF protocol, which is still a fully contention based protocol. The simulation results show that CAMR-MAC not only improves the network throughput but also effectively guarantees the temporal fairness of all stations.