Title :
Performance analysis of the packetized voice transmission with PCF in an IEEE 802.11 infrastructure wireless LAN
Author :
Ma, Xiyan ; Wu, Yi ; Niu, Zhisheng ; Saito, Tamio
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
The IEEE 802.11 standard supports the coexistence of asynchronous and time-bounded traffic by use of the two modes of medium access control (MAC) protocol termed as DCF (distributed coordination function) and PCF (point coordination function) respectively. The former is a random access scheme originally designed for delay-insensitive data applications, and the latter is based on polling mechanism which is more suitable for real-time services such as voice and video etc. In this paper, we focus on the performance of the packetized voice transmission using PCF mode in IEEE 802.11 wireless LAN while the DCF mode is used to provide minimum bandwidth available for data transfers. The effect of fragmentation threshold, echo cancellation and burst errors on network performance is theoretically analyzed.
Keywords :
access protocols; delays; echo suppression; packet radio networks; voice communication; wireless LAN; IEEE 802.11; MAC; asynchronous coexistence; burst errors; data transfers; delay-insensitive data applications; distributed coordination function; echo cancellation; fragmentation threshold; medium access control protocol; packetized voice transmission; point coordination function; polling mechanism; random access scheme; real-time services; time-bounded traffic; wireless LAN; Access protocols; Bandwidth; Delay; Echo cancellers; Media Access Protocol; Performance analysis; Speech analysis; Telecommunication traffic; Traffic control; Wireless LAN;
Conference_Titel :
Communications, 2003. APCC 2003. The 9th Asia-Pacific Conference on
Print_ISBN :
0-7803-8114-9
DOI :
10.1109/APCC.2003.1274422
