Fragment retransmission scheme with enhanced collision avoidance for energy-efficient IEEE 802.11 WLANs

摘要

In IEEE 802.11 based wireless local area networks (WLANs), channel induced errors and collisions cause transmission failures which waste bandwidth and energy. To improve the energy efficiency of battery powered mobile devices we propose a scheme which mitigates channel induced errors and collisions by using two ideas namely, backoff-free fragment retransmission and collision-free transmission schedules, respectively. Performance evaluation using ns-3 showed that the proposed scheme outperforms existing schemes in energy efficiency, throughput and delay.