Title :
A Hybrid-Measure IEEE 802.11e Backoff Scheme in Wireless Mesh Sensor Networks
Author :
Zhang, Jian ; Zhang, Junjie ; Tan, Yin
Author_Institution :
Key Lab. of Specialty Fiber Opt. & Opt. Access Network, Shanghai Univ., Shanghai, China
Abstract :
EDCA is a contention-based channel access scheme defined in the IEEE 802.11e standard and it can ensure quality of multimedia services. In this paper, we propose a new enhanced EDCA scheme called Hybrid-Measure EDCA(HM-EDCA), which dynamically adjust the important parameters-contention window(CW) size according to both of network condition and traffic state of traffic categories at each node. Network condition is measured by frozen rate during back off process, and queue length of each access category is used to estimate traffic state. Extensive simulations are performed to evaluate the proposed protocol. Simulation results demonstrate that HM-EDCA provides a good service differentiation, improves network throughput and reduce the package loss rate at heavy load conditions.
Keywords :
access protocols; quality of service; telecommunication traffic; wireless LAN; wireless mesh networks; wireless sensor networks; contention window; contention-based channel access scheme; hybrid-measure EDCA; hybrid-measure IEEE 802.11e backoff scheme; network condition; network throughput; package loss rate; quality of multimedia services; queue length; traffic state; wireless mesh sensor networks; IEEE 802.11e Standard; Optical fibers; Optical sensors; Telecommunication traffic; Throughput; Wireless communication; Wireless sensor networks; EDCA; acccess categories; contention window size; frozen rate;
Conference_Titel :
Multimedia Information Networking and Security (MINES), 2011 Third International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-1795-6
DOI :
10.1109/MINES.2011.100
