Throughput performance of the distributed and point coordination functions of an IEEE 802.11 wireless LAN

Authors:
Leena Chandran-Wadia;Shruti Mahajan;Sridhar Iyer
Affiliations:
K. R. School of Information Technology, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076;Department of Electrical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076;K. R. School of Information Technology, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076
Venue:
ICCC '02 Proceedings of the 15th international conference on Computer communication
Year:
2002

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Abstract

We study the throughput and delay as a function of load, of data traffic in an IEEE 802.11 Wireless LAN using the public domain network simulator ns-2. We evaluate the Distributed Coordination Function (DCF) as well as the Point Coordination Function (PCF) modes of operation of IEEE 802.11 in detail Although the PCF gives consistently higher throughput in the ranges of load studied, it has higher delay in the relatively lighter ranges of load. So it is optimal to use DCF at light loads and switch to PCF when the load increases.