Optimal packetization interval for VoIP applications over IEEE 802.16 networks

摘要

An analysis of the impact of the packetization interval for constant bit rate traffic is performed in the context of the IEEE 802.16 MAC layer (specifically in the context of IEEE 802.16d, Fixed WiMAX). Bandwidth used for overheads whichinclude lower layer headers as well asretransmissions at the MAC layer is considered. An optimal packetization interval selection method for real-time delay-sensitive applications such as VoIPis proposed. Enhancements to the UnsolicitedGrant Service retransmission strategy areproposed to further improve delay and minimize packet loss while making efficient use of the limited bandwidth resource.