Resource constraints in ad hoc wireless networks require that they are energy efficient during both transmission and rate adaptation. In this paper, we propose a novel energy-efficient rate adaptation protocol that selects modulation schemes online to maximize throughput based on channel state while saving energy. This protocol uses the distributed power control (DPC) algorithm (M. Zawodniok et al., 2004) to accurately determine the necessary transmission power and to reduce the energy consumption. Additionally, the transmission rate is altered using energy efficiency as a constraint to meet the required throughput, which is estimated with queue fill ratio. Moreover, back-off scheme is incorporated to prevent energy wastage and to avoid retransmissions in the event of congestion. The back-off scheme employs backpressure mechanism to emulate congestion control. Consequently, the nodes will conserve energy when the traffic is low, offer higher throughput when needed and save energy during congestion by limiting transmission.

Meeting Name

24th IEEE International Performance, Computing, and Communications Conference, 2005


Electrical and Computer Engineering

Second Department

Computer Science

Keywords and Phrases

DPC; Access Protocols; Ad Hoc Networks; Ad Hoc Wireless Network; Back-Off Scheme; Backpressure Mechanism; Congestion Control; Distributed Control; Distributed Power Control Algorithm; Energy Conservation; Energy Consumption; Maximization; Modulation; Modulation Scheme; Network Traffic; Optimisation; Power Control; Queueing Theory; Rate Adaptation MAC Protocol; Telecommunication Congestion Control; Telecommunication Traffic

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2005 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2005