Opportunistic Power Control with Rate Adaptation for Video Conferencing Services

We propose an opportunistic power control (OPC) algorithm with rate adaptation. It exploits channel variation and transmits opportunistically to optimize system performance. We show that it can be used to support delay-sensitive services like video conference applications. It works well when the wireless channel is changing moderately fast. For slowly varying channels, OPC yields good performance when dumb antenna is used. It outperforms the traditional target tracking approach in terms of both user capacity and power consumption.