An Enhanced CSMA-CA Algorithm for IEEE 802.15.4 LR-WPANs
Jae Ha, Tae Kim, Hong Park, Sunghyun Choi, Wook Hyun Кwon · IEEE Communications Letters · 2007
Two mechanisms are proposed to enhance throughput and energy efficiency of IEEE 802.15.4 CSMA-CA. The first one is an enhanced collision resolution (ECR) mechanism that adjusts the backoff exponent (BE) based on both consecutive clear channel assessment (CCA) busy results and a packet transmission. The second one is an enhanced backoff (EB) mechanism that shifts the range of backoff counters by utilizing the CCA outcome. The simulation results demonstrate that the proposed mechanisms significantly enhance both throughput and energy efficiency of IEEE 802.15.4