Rate Control for Energy Minimization of Delay Constrained Cellular Transmissions

In cellular systems, base stations are considered the components that mostly drain energy. Hence, there have been recent attempts to reduce the power consumed by base stations especially when no users are active in the network and to bring the base station to a "sleep mode" in which the power consumed by the base station has a minimal value. The objective of this study is to exploit sleep mode feature of base stations and to use rate control techniques in order to minimize the energy spent by the base station to satisfy the demands of its active users and their QoS requirements such as delay. In order to understand the behavior of the rate control method, the case where there is only a single active user in the cell is first considered. Then, the problem is extended to the case when several active users are present.