Co-operative MAC protocol: Performance modeling and analysis

Abstract

This work investigates a Cooperative Medium Access Control (CoopMAC) protocol that is backward compatible with the legacy 802.11 system, in which high data rate stations assist low data rate stations in their transmission by forwarding their traffic. New mathematical models have been developed in this work for the performance evaluation of this protocol under different channel conditions and for unsaturated traffic loads. Extensive simulation results validate the mathematical models developed and show that CoopMAC protocol can significantly improve system throughput, service delay, and energy efficiency for WLANs operating under realistic communication scenarios.978-1-4799-2178-2/13/$31.00 ©2013 IEEE

An Energy-Efficient Transmission Scheme for Real-Time Data in Wireless Sensor Networks

“…However, the cooperative scheme is available at the different protocol layers such as MAC layer and network layer for better network performance. In particular, to facilitate access to the physical layer information and adaptation to mobility, it is natural to apply the cooperative scheme to the MAC layer [22]. In [23,24], two similar protocols, called CoopMAC and rDCF, based on the IEEE 802.11 DCF was proposed to reduce the throughput bottleneck caused by low-data-rate nodes.…”