Green Mobile Devices and Networks

Chapter 4

Striking a Balance between Energy Conservation and QoS Provision for VoIP in WiMAX Systems

Xiao-Hui Lin, Ling Liu, Hui Wang, Jing Liu, and Yu-Kwong Kwok

Contents

4.1 Introduction

4.2 WiMAX: Low-Cost Broad Bandwidth for Consumers

4.3 Human Speech Model and the Hybrid Scheme

4.3.1 Scenario 1: One-Way Voice Communication

4.3.2 Scenario 2: Two-Way Voice Communication

4.3.3 Hybrid Scheme

4.4 Performance Analysis

4.4.1 Scenario 1: One-Way Voice Communication

4.4.1.1 Average Downlink Talk-Spurt Delay

4.4.1.2 Loss Rate

4.4.1.3 Average Number of ...