ABSTRACT
CONTENTS 7.1 Introduction ............................................................................................... 129 7.2 Legacy IEEE 802.16e Handover Procedures ......................................... 131
7.2.1 Association L0 ................................................................................ 132 7.2.2 Association L1 ................................................................................ 132 7.2.3 Association L2 ................................................................................ 133
7.3 Measured Signal-Aware Mechanism ..................................................... 134 7.4 Mobility Prediction .................................................................................. 136 7.5 The Predicted Handover Scheme ........................................................... 138 7.6 Simulation Handover Model and Results ............................................ 141 7.7 Conclusion ................................................................................................. 143 References ........................................................................................................... 144
Voice over Internet protocol (VoIP) has been established in the workplace as a transport mechanism for both fixed and wireless infrastructures. Switching voice paths within the existing packet-switched data networks as IP packets means that there is no need for separating voice and data infrastructures, and the traditional private branch exchange (PBX) can be replaced by a single server capable of supporting thousands of IP handsets. These devices look like regular phones but are handled more like personal computers (PCs), carrying their own unique identities with them wherever they connect to the network.
