Power-Delay Tradeoff Over Wireless Networks Conference Paper uri icon

abstract

  • When transmitting stochastic, traffic flows over wireless networks, there, exists an inherent tradeoff between average transmit power and corresponding queuing-delay bound. In this paper, we investigate such a tradeoff and show how average power increases as delaybound requirement becomes stringent. Specifically, we propose the resource allocation schemes to minimize the power consumption subject to a delay quality-of-service (QoS) constraint, where the delay constraint is in terms of queue-length decaying rate when an arrival traffic is transmitted through the wireless networks. We focus on orthogonal-frequency-division-multiplexing (OFDM) communications under three different network infrastructures, namely, point-to-point link, multihop amplify-and-forward (AF) network, and multiuser cellular network. We derive the optimal resource allocation policies for each scenario, and compare their performances with other existing resource-allocation policies. The obtained simulation and numerical results show that using our proposed optimal resource-allocation policies, significant power saving can be achieved. Furthermore, our OFDM-based communications systems can significantly save the power consumption, especially under stringent delay constraint. 2008 IEEE.

name of conference

  • 2008 International Symposium on a World of Wireless, Mobile and Multimedia Networks

published proceedings

  • 2008 IEEE INTERNATIONAL SYMPOSIUM ON A WORLD OF WIRELESS, MOBILE AND MULTIMEDIA NETWORKS, VOLS 1 AND 2

author list (cited authors)

  • Tang, J., & Zhang, X. i.

citation count

  • 5

complete list of authors

  • Tang, Jia||Zhang, Xi

publication date

  • June 2008