Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Acronyms
- 1 Introduction
- Part I Basic concepts
- Part II Centralized cross-layer optimization
- Part III Distributed cross-layer optimization
- Part IV Cross-layer optimization for energy-efficient networks
- 18 Overview
- 19 Energy-efficient transmission
- 20 Centralized energy-efficient wireless resource management
- 21 Distributed energy-efficient wireless resource management
- 22 Energy-efficient cellular network design
- 23 Implementation in practice
- Appendix A Proofs of Theorems and Lemmas
- References
- Index
21 - Distributed energy-efficient wireless resource management
from Part IV - Cross-layer optimization for energy-efficient networks
Published online by Cambridge University Press: 05 December 2014
- Frontmatter
- Dedication
- Contents
- Preface
- Acronyms
- 1 Introduction
- Part I Basic concepts
- Part II Centralized cross-layer optimization
- Part III Distributed cross-layer optimization
- Part IV Cross-layer optimization for energy-efficient networks
- 18 Overview
- 19 Energy-efficient transmission
- 20 Centralized energy-efficient wireless resource management
- 21 Distributed energy-efficient wireless resource management
- 22 Energy-efficient cellular network design
- 23 Implementation in practice
- Appendix A Proofs of Theorems and Lemmas
- References
- Index
Summary
In the previous two chapters, we discussed energy-efficient transmission and centralized resource scheduling techniques. As multiple users need to reuse the same spectrum at different locations, interference among different links determines overall network performance. Interference is one major factor that limits system performance, especially as more aggressive frequency reuse is used in future wireless networks. This motivates the design of advanced distributed medium access control (MAC) schemes to manage orthogonal network resources and the use of power control for interference management among users reusing the same frequency. In this chapter, we will first introduce distributed energy-efficient MAC designs. We will discuss the key design principle and the impact of traffic load on the network energy efficiency when distributed MAC protocols are used. Then we study the fundamental impact of interference on network energy efficiency. We first assume ideal collaboration for a two-user network and disclose several basic laws of energy-efficient designs in interference-limited scenarios. Then we study in detail the distributed power optimization for energy-efficient communications.
Distributed energy-efficient MAC design
Each wireless device may have five operating modes: transmit, receive, idle, sleep, and off. The main functions of each mode are listed below.
(i) Transmit mode: sends data.
(ii) Receive mode: receives data.
(iii) Idle: all transceiver components are on and ready to send or receive data.
(iv) Sleep: the major transceiver circuit components are turned off with a very limited portion remaining on to listen to demands outside.
(v) Off: power completely off.
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- Information
- Energy and Spectrum Efficient Wireless Network Design , pp. 301 - 320Publisher: Cambridge University PressPrint publication year: 2014