Latency-sensitive power control for wireless ad-hoc networks

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Author

Mohamed R. Fouad, Sonia Fahmy, Gopal Pandurangan

Entry type

proceedings

Abstract

We investigate the impact of power control on latency in wireless ad-hoc networks. If transmission power is increased, interference increases, thus reducing network capacity. A node sending/relaying delay-sensitive real-time application traffic can, however, use a higher power level to reduce latency, if it considers information about load and channel contention at its neighboring nodes. Based on this observation, we formulate a new distributed power control protocol, Load-Aware Power Control (LAPC), that heuristically considers low end-to-end latency when selecting power levels. We study the performance of LAPC via simulations, varying the network density, node dispersion patterns, and traffic load. Our simulation results demonstrate that LAPC achieves an average end-to-end latency improvement of 54\% over the case when nodes are transmitting at the highest power possible, and an average end-to-end latency improvement of 33\% over the case when nodes are transmitting using the lowest power possible, for uniformly dispersed nodes in a lightly loaded network.

Date

2005

URL

http://portal.acm.org/citation ... 4003&CFTOKEN=23673053

Booktitle

International Workshop on Modeling Analysis and Simulation of Wireless and Mobile Systems. Proceedings of the 1st ACM international workshop on Quality of service & security in wireless and mobile networks

Key alpha

Fahmy

Pages

31-38

Publisher

ACM

Affiliation

Purdue University

Publication Date

2005-00-00

BibTex-formatted data

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@Proceedings{ Fahmy,
	title = "Latency-sensitive power control for wireless ad-hoc networks",
	author = "Mohamed R. Fouad, Sonia Fahmy, Gopal Pandurangan",
	year = "2005",
	booktitle = "International Workshop on Modeling Analysis and Simulation of Wireless and Mobile Systems. Proceedings of the 1st ACM international workshop on Quality of service & security in wireless and mobile networks",
	pages = "31-38",
	publisher = "ACM",
	abstract = " We investigate the impact of power control on latency in wireless ad-hoc networks. If transmission power is increased, interference increases, thus reducing network capacity. A node sending/relaying delay-sensitive real-time application traffic can, however, use a higher power level to reduce latency, if it considers information about load and channel contention at its neighboring nodes. Based on this observation, we formulate a new distributed power control protocol, Load-Aware Power Control (LAPC), that heuristically considers low end-to-end latency when selecting power levels. We study the performance of LAPC via simulations, varying the network density, node dispersion patterns, and traffic load. Our simulation results demonstrate that LAPC achieves an average end-to-end latency improvement of 54\% over the case when nodes are transmitting at the highest power possible, and an average end-to-end latency improvement of 33\% over the case when nodes are transmitting using the lowest power possible, for uniformly dispersed nodes in a lightly loaded network.
",
	affiliation = "Purdue University",
	url = "http://portal.acm.org/citation.cfm?id=1089761.1089768&coll=ACM&dl=ACM&CFID=27034003&CFTOKEN=23673053",
}