Title :
Enhancement of QoS differentiation over IEEE 802.11 WLAN
Author :
Zhao, Liqiang ; Fan, Changxin
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
Abstract :
IQD, a distributed coordination function (DCF) with integrated quality of service (QoS) differentiation, is proposed in this letter to enhance QoS over IEEE 802.11 WLAN. DCF does not support any QoS differentiation. Enhanced DCF (EDCF) only supports delay differentiation. IQD can achieve both delay and packet-loss-rate differentiation by differentiating the initial window size and the retry limit. Simulation results show that IQD performs better than DCF and EDCF in enhancing QoS, and the proposed analytical model is valid.
Keywords :
delays; packet switching; quality of service; wireless LAN; IEEE 802.11 WLAN; QoS; delay; distributed coordination function; initial window size; integrated quality of service differentiation; packet-loss-rate; Analytical models; Delay; Laboratories; Performance analysis; Protocols; Quality of service; Robustness; Size control; Throughput; Wireless LAN; 02.11; DCF; Distributed coordination function; EDCF; IEEE; QoS; WLAN; enhanced DCF; quality of service;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.833787
