Title :
VoIP Scheduling Algorithm for AMR Speech Codec in IEEE 802.16e/m System
Author :
Oh, Sung-Min ; Cho, Sunghyun ; Kim, Jae-Hyun ; Kwun, Jonghyung
Author_Institution :
Sch. of Electr. & Comput. Eng., Ajou Univ., Suwon
fDate :
5/1/2008 12:00:00 AM
Abstract :
This letter proposes an efficient uplink scheduling algorithm for voice over Internet protocol (VoIP) services with adaptive multi-rate (AMR) speech codec in IEEE 802.16e/m systems. The proposed scheduling algorithm adopts the random access scheme during silent-period to reduce the waste of uplink bandwidth considering the characteristics of AMR speech codec. The numerical results show that the proposed algorithm can increase the maximum supportable number of voice users by 26% compared to the conventional extended real-time polling service (ertPS).
Keywords :
Internet telephony; WiMax; scheduling; speech codecs; IEEE 802.16e/m system; VoIP scheduling algorithm; adaptive multirate speech codec; random access scheme; uplink bandwidth; uplink scheduling algorithm; Bandwidth; Bit rate; Code standards; Internet telephony; Quality of service; Research and development; Scheduling algorithm; Speech codecs; Standards development; Standards publication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2008.072098
