Title :
A new access algorithm for PCF modes in wireless LANs
Author :
Liao, Shengbin ; Cheng, Wenqing
Author_Institution :
Eng. & Res. Center for Inf. Technol., Huazhong Normal Univ., Wuhan, China
Abstract :
In this paper, a new point coordination function (PCF) scheme, NPCF is presented, which is based on CSMA/CA with equal backoff window in all stations rather than polling mechanism, it can decrease delay and improve throughput, and is also different with distributed coordination function (DCF). NPCF is motivated by the following ideas: in the access method of PCF, a point coordinator (PC) performing the role of the polling master knows some information of the network, such as the number of active stations, the performance of NPCF based on CSMA/CA is better than PCF based on polling by using these information. Analysis and simulation results validate our conclusion.
Keywords :
carrier sense multiple access; wireless LAN; CSMA-CA; PCF modes; access algorithm; carrier sense multiple access; distributed coordination function; local area networks; new point coordination function scheme; polling master; polling mechanism; wireless LAN; Analytical models; Constraint optimization; Delay; Downlink; Information technology; Multiaccess communication; Performance analysis; Resource management; Throughput; Wireless LAN;
Conference_Titel :
Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4856-2
Electronic_ISBN :
978-1-4244-5668-0
DOI :
10.1109/WCSP.2009.5371620
