Adaptive Rate Control for VoIP in Wireless Ad Hoc Networks

Author

Zhang, Hongqi ; Zhao, Jiying ; Yang, Oliver

Author_Institution

Sch. of Inf. Technol. & Eng., Univ. of Ottawa, Ottawa, ON

fYear

2008

Firstpage

3166

Lastpage

3170

Abstract

The purpose of this paper is to study the performance of voice transportation in wireless ad hoc networks. First we analyze the characteristics of wireless channel and speech coding standard AMR-WB, and then we propose an adaptive source network rate control scheme to battle packet loss. The basic idea is to adapt the voice coding bit rate to the available network bandwidth in order to maximize the quality of voice. The PESQ MOS value is used as the evaluation criteria for the adaptive rate control scheme. Moreover, the discontinuous transmission operation and packet combination are utilized to improve the performance further. The experimental results show the effectiveness of this scheme.

Keywords

Internet telephony; ad hoc networks; adaptive control; telecommunication congestion control; wireless channels; VoIP; adaptive source network rate control scheme; discontinuous transmission operation; packet combination; packet loss; speech coding standard; wireless ad hoc networks; wireless channel; Ad hoc networks; Adaptive control; Bandwidth; Bit rate; Degradation; Mobile ad hoc networks; Programmable control; Speech analysis; Speech coding; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2008. ICC '08. IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2075-9

Electronic_ISBN

978-1-4244-2075-9

Type

conf

DOI

10.1109/ICC.2008.596

Filename

4533632