摘要
Zhu introduced typical analytical models to simulate the 802. 11e EDCF channel access protocol. But our analysis indicates that there are some inaccurate derivations in his presentation. This paper intends to improve analytical model with some corrections. Furthermore, for the probability of the channel being busy pb in Zhu＇s model, different points and analysis method are proposed. When the network is under saturation condition, the new results about the probabilities of collision and channel busy, transmission probabilities, successful transmission probabilities, throughput and MAC layer latency are presented.
Zhu introduced typical analytical models to simulate the 802. 11e EDCF channel access protocol. But our analysis indicates that there are some inaccurate derivations in his presentation. This paper intends to improve analytical model with some corrections. Furthermore, for the probability of the channel being busy pb in Zhu＇s model, different points and analysis method are proposed. When the network is under saturation condition, the new results about the probabilities of collision and channel busy, transmission probabilities, successful transmission probabilities, throughput and MAC layer latency are presented.
基金
FoundationitemHuaweiR&DProjectofChina(No.YBNP2004015)andSWJTUFundofChina(No.2005B02)
作者简介
Zhang Lianbo （1973-）, engineer, master. His research of interest is in wireless access network. Fang Xuming （1962-）,professor, PhD. His reseerch of interest is in wireless and mobile networks, next generation mobile networks. Corresponding author. Tel. ： ＋86-28-8760184,5; Fax： ＋86- 28-87600743; E-mail： xmfang@home, swjm. edu. cnShah Ying （1980-）, engineer, master. Her research of interest is in wireless mesh network
