Title :
Unfairness and capture behaviour in 802.11 adhoc networks
Author :
Ware, Christopher ; Judge, John ; Chicharo, Joe ; Dutkiewicz, Eryk
Author_Institution :
Switched Networks Res. Centre, Wollongong Univ., NSW, Australia
Abstract :
We address issues with the performance of IEEE 802.11, when used in the adhoc mode, in the presence of hidden terminals. We present results illustrating the strong dependence of channel capture behavior on the SNR observed on contending hidden connections. Experimental work has illustrated that in a hidden terminal scenario, the connection having the strongest SNR is able to capture the channel, despite the use of the RTS-CTS-DATA-ACK 4-way handshake designed to alleviate this problem. Our results indicate that the near-far SNR problem may have a significant effect on the performance of an adhoc 802.11 network
Keywords :
IEEE standards; access protocols; data communication; performance evaluation; telecommunication standards; transport protocols; wireless LAN; IEEE 802.11 adhoc networks; MAC protocol; RTS-CTS-DATA-ACK 4-way handshake; SNR; TCP Reno; WaveLAN IEEE 802.11 PC cards; channel capture behavior; experiment; hidden connections; hidden terminals; near-far SNR problem; network performance; reliable wireless data transport; unfairness behaviour; wireless LAN; wireless local area network; Australia; Delay; Intelligent networks; Media Access Protocol; Network topology; Signal to noise ratio; Spread spectrum communication; Transport protocols; Wireless application protocol; Wireless networks;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853084
