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 contribution||Scheduling technique for improving call capacity for VoIP traffic in MIMO-OFDMA networks|
|Title of host publication||VTC Fall 2009, Anchorage, Alaska|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Pages||1 - 5|
|Number of pages||5|
|Publication status||Published - Sep 2009|
|Event||70th Vehicular Technology Conference 2009 (VTC 2009-Fall) - Anchorage, Alaska, United States|
Duration: 1 Sep 2009 → …
|Conference||70th Vehicular Technology Conference 2009 (VTC 2009-Fall)|
|Period||1/09/09 → …|
Bibliographical noteRose 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).
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- VoIP traffic