Title :
Wireless VoIP Adaptive Source Rate Control Algorithm
Author :
Wei, Lulu ; Wu, Muqing ; Wu, Dapeng
Author_Institution :
Broadband Commun. Networks Lab., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
For the limitation of the network resources, to support real-time service in mobile ad hoc networks is challenging, especially for the delay sensitive voice sessions. Firstly, the delay spike phenomenon is described and analyzed in detail in this paper. Then, to alleviate its impairment on the voice quality, based on the prediction of delay spikes, a new source rate adjusting mechanism is proposed, which changes the number of voice frames in the RTP packet according to the network conditions adaptively. The results have shown that our scheme can improve the voice quality obviously; moreover, network congestion can be relieved or even avoided effectively.
Keywords :
Internet telephony; ad hoc networks; adaptive control; mobile radio; quality of service; telecommunication congestion control; transport protocols; RTP packet; delay sensitive voice session; delay spike prediction; mobile ad hoc network; network resource limitation; quality of service; real-time service; source rate adjusting mechanism; voice frame; voice quality; wireless VoIP adaptive source rate control algorithm; Adaptive control; Codecs; Communication system traffic control; Delay; Jitter; Mobile ad hoc networks; Programmable control; Quality of service; Signal to noise ratio; 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.2009.5303335
