Title :
Bandwidth Allocation Algorithm of VoIP Based on the Adaptive Linear Prediction in the IEEE 802.16 System
Author :
Yanfeng, Guan ; Aiqun, Hu
Author_Institution :
Res. Center of Inf. Security, Southeast Univ., Nanjing
Abstract :
This paper points out the factor that affects the VoIP ( voice over IP ) capacity under the PMP ( point-to-multipoint) mode in the IEEE 802.16 system. By theoretically analyzing the statistical characteristics of VoIP data streams, we propose a new bandwidth allocation algorithm and implement it based on the adaptive linear prediction, which can remarkably reduce the bandwidth waste resulted from UGS (unsolicited grant service) specified in the IEEE 802.16 standard and overcome the conservative nature of effective bandwidth. Simulation results show that this algorithm can improve VoIP capacity up to 150% and 50% compared with UGS and effective bandwidth, respectively. In addition, the packet loss rate and transfer delay are 1.4% and 5.1ms below between BS (base station) and SS (subscriber station) Respectively
Keywords :
IEEE standards; Internet telephony; WiMax; bandwidth allocation; media streaming; prediction theory; statistical analysis; IEEE 802.16 system; PMP; UGS; VoIP; adaptive linear prediction; bandwidth allocation algorithm; base station; data stream; point-to-multipoint mode; statistical analysis; subscriber station; unsolicited grant service; voice-over-IP; Bandwidth; Channel allocation; Information security; Internet telephony; Markov processes; Portable media players; Predictive models; Quality of service; Streaming media; Traffic control; 802.16; UGS; VoIP; adaptive; capacity;
Conference_Titel :
ITS Telecommunications Proceedings, 2006 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-9587-5
Electronic_ISBN :
0-7803-9587-5
DOI :
10.1109/ITST.2006.288750
