Energy conservation and interference mitigation: From decoupling property to win-win strategy

Liqun Fu, Hongseok Kim, Jianwei Huang, Soung Chang Liew, Mung Chiang

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

2 Scopus citations

Abstract

This paper studies the problem of conserving the energy of mobile terminals in a multi-cell TDMA networks supporting bursty real-time sessions. The associated optimization problem involves joint scheduling, rate control, and power control. To tackle the complexity, we propose a decomposition method that decouples the overall problem into two sub-problems: intra-cell energy optimization and intercell interference control. This decomposition results in a "winwin" situation: it reduces the energy consumptions and intercell interference at the same time. Simulations show that our decomposition method can achieve an energy reduction of more than 70% compared to the simplistic maximum transmit power policy. It can achieve an energy reduction of more than 50% compared to the case where only intra-cell energy optimal transmission is performed.We also derive an interesting decoupling property assuming that the interference power stays constant over a TDMA frame: if the idle power consumption of mobile terminals is no less than their circuit power consumption during transmission, or when both are negligible, then the energy-optimal transmission rates of the mobile terminals are independent of the inter-cell interference power level.

Original languageEnglish (US)
Title of host publication2010 49th IEEE Conference on Decision and Control, CDC 2010
Pages1830-1835
Number of pages6
DOIs
StatePublished - Dec 1 2010
Event2010 49th IEEE Conference on Decision and Control, CDC 2010 - Atlanta, GA, United States
Duration: Dec 15 2010Dec 17 2010

Publication series

NameProceedings of the IEEE Conference on Decision and Control
ISSN (Print)0191-2216

Other

Other2010 49th IEEE Conference on Decision and Control, CDC 2010
CountryUnited States
CityAtlanta, GA
Period12/15/1012/17/10

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Modeling and Simulation
  • Control and Optimization

Keywords

  • Energy-efficiency
  • Multi-cell wireless system
  • Power control
  • Rate control
  • Scheduling

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