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Scheduling techniques for improving call capacity for VoIP traffic in MIMO-OFDMA networks

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

Original languageEnglish
Title of host publicationVTC Fall 2009, Anchorage, Alaska
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages1 - 5
Number of pages5
ISBN (Print)9781424425143
StatePublished - Sep 2009
Event70th Vehicular Technology Conference 2009 (VTC 2009-Fall) - Anchorage, Alaska, United States

Publication series

ISSN (Print)10903038


Conference70th Vehicular Technology Conference 2009 (VTC 2009-Fall)
CountryUnited States
CityAnchorage, Alaska
Period1/09/09 → …


Fourth generation networks will almost invariably adopt OFDMA (orthogonal frequency division multiple access) and MIMO (multiple input-multiple output) technologies, in order to meet high data rate and quality of service (QoS) requirements. The worldwide interoperability for microwave access (WiMAX) MAC Layer, which is based on the IEEE 802.16 standard, is designed to support a variety of applications, including voice and multimedia services. The problem of providing QoS in broadband wireless systems is one of managing radio resources effectively. Efficient scheduling algorithms that balance the QoS requirements of each application and user with the available radio resources need to be developed. This paper considers a number of scheduling policies concentrating on real-time voice over IP (VoIP) traffic. Via numerical results we show that the conventional notion of fairness fails to guarantee service for low latency applications such as VoIP for an increasing traffic load. We show better QoS is achieved via a greedy scheduling approach that manages to serve packets faster.

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Sponsorship: The authors wish to acknowledge the financial support of EPSRC and Toshiba Research Europe Limited (TREL). Terms of use: Copyright © 2009 IEEE. Reprinted from IEEE 70th Vehicular Technology Conference, Fall 2009 (VTC-Fall 2009). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • VoIP traffic, MIMO-OFDMA


70th Vehicular Technology Conference 2009 (VTC 2009-Fall)

Duration1 Sep 2009 → …
CityAnchorage, Alaska
CountryUnited States

Event: Conference

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