Integrating SIP and IEEE 802.11e to support handoff and multi-grade QoS for VoIP applications

Jen-Jee Chen, Ling Lee, Yu-Chee Tseng*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

With the increasing popularity of wireless networks and the growing demand for VoIP services, there is a need to guarantee QoS for VoIP calls while supporting as many calls as possible. This paper considers the handoff and QoS issues of VoIP calls under IEEE 802.11e WLANs. Assuming that VoIP calls can be supported by multiple levels of QoS, we show how to conduct call admission control and handoff by integrating SIP and QoS mechanisms of IEEE 802.lie. The proposed scheme is designed to dynamically adjust the resource distribution among existing calls according to the network condition. Multi-level QoS is achieved by adjusting codecs and packetization intervals of calls. The result shows better utilization of bandwidth, decreased blocking rate for new calls, and less dropping rate for handoff calls. In addition, we also show how to achieve early resumption of resources as calls leave a QAP. Simulation result is presented to evaluate the performance of the proposed schemes.

Original languageEnglish
Title of host publicationQ2SWinet 2006
Subtitle of host publicationProceedings of the Second ACM International Workshop on Quality of Service and Security in Wireless and Mobile Networks
Pages67-74
Number of pages8
DOIs
StatePublished - 1 Dec 2006
EventQ2SWinet 2006: 2nd ACM International Workshop on Quality of Service and Security in Wireless and Mobile Networks - Terromolinos, Malaga, Spain
Duration: 2 Oct 20062 Oct 2006

Publication series

NameQ2SWinet 2006: Proceedings of the Second ACM International Workshop on Quality of Service and Security in Wireless and Mobile Networks

Conference

ConferenceQ2SWinet 2006: 2nd ACM International Workshop on Quality of Service and Security in Wireless and Mobile Networks
CountrySpain
CityTerromolinos, Malaga
Period2/10/062/10/06

Keywords

  • Call admission control (CAC)
  • Handoff
  • IEEE 802.11e
  • Quality of service (QoS)
  • Session initiation protocol (SIP)
  • Voice over IP (VoIP)
  • Wireless network

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