Title :
Improving Performance of VoIP Services in IEEE 802.16 OFDMA System
Author :
Wang, Xuan ; Yu, Ke ; Zhang, Lin
Author_Institution :
Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China
Abstract :
IEEE 802.16 is a promising technology in broadband wireless access area. In this paper, a novel performance analysis model is provided focusing on the VoIP services in TDD OFDMA-based IEEE 802.16 system. Based on the analysis results, a united packet aggregation scheme for both uplink and downlink is provided. The simulation results show that the packet aggregation in MAC layer not only improves the VoIP capacity but also guarantees the quality of VoIP through decreasing the VoIP packet delay.
Keywords :
Internet telephony; OFDM modulation; WiMax; frequency division multiple access; MAC layer; TDD OFDMA-based IEEE 802.16 system; VoIP packet delay; VoIP services; united packet aggregation scheme; Automatic repeat request; Delay; Downlink; Forward error correction; Internet telephony; Laboratories; Performance analysis; Protocols; Streaming media; Traffic control;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5300945
