Optimal delay-power tradeoff in wireless transmission with fixed modulation

Wei Chen, Zhigang Cao, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)

Abstract

Cross-layer scheduling is an emerging and powerful solution that can significantly improve the Quality of Service (QoS) and power efficiency in wireless networks by jointly using channel and buffer states to adjust transmission power and rate. In conventional scheduling methods, adaptive modulation and coding (AMC) is adopted to realize rate adaptation. However, this may greatly increase the transceiver and protocol complexity. To overcome this, scheduling methods based on fixed modulation are studied in this paper. In this case, the scheduler only needs to determine whether the transmitter is active at given channel and buffer state. When the transmitter is active, it will transmit in a fixed data rate, by using power adaptation to achieve a required SNR at the receiver. Our aim is to minimize the average packet delay given constraint on average power. To do that, we shall derive the analytical results of delay, packet-loss rate, and power consumption of cross-layer scheduling. It will then be shown that there exists a fundamental tradeoff between delay and power, which characterize the performance limit of cross-layer scheduling. In addition, a delay-optimal scheduling method will also be presented.

Original languageEnglish
Title of host publication2007 International Workshop on Cross Layer Design, IWCLD 2007
Pages60-64
Number of pages5
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event1st International Workshop on Cross Layer Design, IWCLD 2007 - Jinan, China
Duration: 20 Sep 200721 Sep 2007

Other

Other1st International Workshop on Cross Layer Design, IWCLD 2007
CountryChina
CityJinan
Period20/9/0721/9/07

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Keywords

  • Cross-layer design
  • Delay
  • Power efficiency
  • Scheduling
  • Wireless networks

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Chen, W., Cao, Z., & Letaief, K. (2007). Optimal delay-power tradeoff in wireless transmission with fixed modulation. In 2007 International Workshop on Cross Layer Design, IWCLD 2007 (pp. 60-64). [4379038] https://doi.org/10.1109/IWCLD.2007.4379038