A novel distributed power control (DPC)⋅ scheme and a MAC protocol for wireless ad hoc networks in the presence of radio channel uncertainties such as path loss, Shadowing and Rayleigh fading is presented. The DPC quickly estimates the time-varying nature of the channel and uses the information to select a suitable transmitter power value in order to maintain a target Signal-to-Interference ratio (SIR) at the receiver. The standard assumption of a constant interference during a link's power update used in other works is relaxed. The performance of the proposed DPC is demonstrated analytically. The power used for all RTS-CTS-DATA-ACK frames is selected using the proposed DPC; hence, energy savings and spatial reuse are achieved. The hidden-terminal problem is overcome by periodically increasing the power. The NS simulator is used to compare the proposed scheme with 802.11. The proposed MAC protocol renders a significant increase in throughput in the presence of channel variations compared with 802.11 while consuming low energy per bit.
M. J. Zawodniok and J. Sarangapani, "A Distributed Power Control MAC Protocol for Wireless Ad-hoc Networks.," Proceedings of the IEEE Wireless Communications and Networking Conference, 2004, Institute of Electrical and Electronics Engineers (IEEE), Jan 2004.
The definitive version is available at http://dx.doi.org/10.1109/WCNC.2004.1311846
IEEE Wireless Communications and Networking Conference, 2004
Electrical and Computer Engineering
National Fund for Scientific Research, Belgium
Keywords and Phrases
Convergence; Distributed Power Control; Fading Channels; Wireless Adhoc Networks
Article - Conference proceedings
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