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

M Nicolaou, A Doufexi, SMD Armour, Y Sun

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

10 Citations (Scopus)
263 Downloads (Pure)


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.
Translated title of the contributionScheduling technique for improving call capacity for VoIP traffic in MIMO-OFDMA networks
Original languageEnglish
Title of host publicationVTC Fall 2009, Anchorage, Alaska
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1 - 5
Number of pages5
ISBN (Print)9781424425143
Publication statusPublished - Sep 2009
Event70th Vehicular Technology Conference 2009 (VTC 2009-Fall) - Anchorage, Alaska, United States
Duration: 1 Sep 2009 → …

Publication series

ISSN (Print)10903038


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

Bibliographical note

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).

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