MTIM for IEEE 802.11 DCF Power Saving Mode
In IEEE 802.11 wireless LAN, after the transmissionof each beacon frame, there will be a large number of stationsin power saving mode (PS mode, PSM) trying to send powersaving poll (PS-Poll) frames to contend the right to receive thebuffered downlink packets. However, excessive contentionresults in higher collision probability, higher powerconsumption and lower throughput than usual. To solve thisproblem, we propose a downlink access scheme which modifiesthe traffic indication map (TIM) fields in beacon frames toenhance the control ability of access point (AP). This schemewhich can be used in both the basic access scheme and theaccess scheme with RTS/CTS enables AP to constrain thenumber of stations in contention to be an optimal number.Furthermore, the proposed MTIM scheme provides aconvenient way for quality of service (QoS) differentiation bylimiting the PS-Poll transmitting of stations with lower priority.Simulation results provided in this paper prove theperformance improvement.
Pengbo Si Hong Ji Guangxin Yue Jingya Zhang
Key Laboratory of Universal Wireless Communication, Ministry of Education Beijing University of Posts and Telecommunications Beijing, P.R.China
国际会议
2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)
日本福冈
英文
2007-07-11（万方平台首次上网日期，不代表论文的发表时间）