Discrete Rate Scheduling for Power Efficient Transmission over Wireless Link

While scheduling transmissions in a wireless communications system can result in significant power savings, a realistic scheduling scheme must take into acvount practical constraints that apply to wireless transmitters. Here, we examine scheduling actions for power efficiency under the constraints that physical transmission may be carried out at a set of fixed non-zero rates. For this class of schedulers, we derive the optimal scheduling policy under specified average delay constraints for the simple case when under constant channel conditions. We also derive bounds on both the achievable delays as well as power performances for a general -rate scheduler