IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Regular Section
An Efficient Uplink Scheduling Algorithm with Variable Grant-Interval for VoIP Service in BWA Systems
Sung-Min OHSunghyun CHOJae-Hyun KIMJonghyung KWUN
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2008 Volume E91.B Issue 10 Pages 3379-3382


This letter proposes an efficient uplink scheduling algorithm for the voice over Internet protocol (VoIP) service with variable frame-duration according to the voice activity in IEEE 802.16e/m systems. The proposed algorithm dynamically changes the grant-interval to save the uplink bandwidth, and it uses the random access scheme when the voice activity changes from silent-period to talk-spurt. Numerical results show that the proposed algorithm can increase the VoIP capacity by 26 percent compared to the conventional extended real-time polling service (ertPS).

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© 2008 The Institute of Electronics, Information and Communication Engineers
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