Title :
An Enhanced CSMA-CA Algorithm for IEEE 802.15.4 LR-WPANs
Author :
Ha, Jae Yeol ; Kim, Tae Hyun ; Park, Hong Seong ; Choi, Sunghyun ; Kwon, Wook Hyun
Author_Institution :
Control Inf. Syst. Lab., Seoul Nat. Univ.
fDate :
5/1/2007 12:00:00 AM
Abstract :
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
Keywords :
carrier sense multiple access; personal area networks; telecommunication congestion control; wireless channels; CCA; CSMA-CA algorithm; ECR mechanism; IEEE 802.15.4 LR-WPAN; carrier sense multiple access; clear channel assessment; collision avoidance; enhanced backoff mechanism; enhanced collision resolution; wireless personal area network; Counting circuits; Electronic mail; Energy consumption; Energy efficiency; Energy resolution; Helium; Laboratories; Media Access Protocol; Robustness; Throughput;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.061891
