Efficient Signaling for VoIP in OFDMA

Abstract

Voice over Internet protocol (VoIP) will be commonplace in future wireless standards. Due to the potentially large number of VoIP users in a wireless system, the overhead associated with controlling VoIP transmissions can hinder system performance, unless it is carefully managed. This paper outlines current efforts in B3G (beyond 3G) standards development to efficiently control VoIP transmissions by grouping VoIP users into scheduling groups, assigning the group a set of shared time-frequency resources, and using bitmap signaling to allocate resources. System level simulations are used to validate the signaling technique and show that the technique can efficiently support 93 users per megahertz. Potential further improvements are described.