Coordinated Qos Aware User Scheduling And Power Allocation Scheme For Ofdma System

In recent years many papers have been published for energy-efficient resource allocation in a cellular OFDMA system. In this paper we carried out combined user scheduling and power optimization based on per subcarrier or per base station for each with maximum transmits power in coordinated BS. Here three definitions of the energy efficiency are considered for system design with channel rate and the power level. The resources allocation and power allocation are optimized across a cluster of coordinated base stations with a constraint on the maximum transmit power (either per subcarrier or per base station). And we prove the efficiency of quality of service aware channel allocation gives better performance over conventional packet scheduling for OFDMA users. And the maximization of the energy efficiency is approximately equivalent to the maximization of the spectral efficiency for small values of the maximum transmit power and moderate reduction of the data rate leads a larger saving of energy. Also, the performance gap among the considered QOS aware resource allocation strategies over power level based user scheduling reduces the scope of energy centric OFDMA scheduling methods.