A framework for adaptive voice communication over wireless channels

Sandeep Gupta, Suhaib A. Obeidat

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Time-varying channel error conditions of a wireless link do not allow for providing a steady service quality. Adaptability is one way to go around this problem since the quality of service (QoS) requirements can be changed as the channel status changes. In this paper, we propose a framework for adaptive voice over one-hop wireless communication between a source and a destination. Adaptability is achieved at two levels: (1) changing the voice-encoding rate, and (2) changing the signal modulation scheme. In addition to reacting to the channel conditions and hence achieving better quality, adaptation, will allow for the support of more of the offered load (i.e., higher multiplexing gain). This will introduce some issues and problems; the goal was to reach to a near-optimal operating point, where quality is not traded for bandwidth efficiency. We simulated a special case of the framework. Results show that the adaptive approach has a much less degradation in voice quality (DVQ) and allows for more voice communications to be supported.

Original languageEnglish (US)
Title of host publication2003 IEEE Wireless Communications and Networking Conference, WCNC 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1096-1101
Number of pages6
ISBN (Electronic)0780377001
DOIs
StatePublished - Jan 1 2003
Event2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003 - New Orleans, United States
Duration: Mar 16 2003Mar 20 2003

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
Volume2
ISSN (Print)1525-3511

Other

Other2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003
CountryUnited States
CityNew Orleans
Period3/16/033/20/03

Keywords

  • Modulation
  • Multimedia communications
  • Packetized voice
  • Wireless communications

ASJC Scopus subject areas

  • Engineering(all)

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