Wireless Network Based On The Utility Function Of The Rate Allocation And Power Control

Radio resource management plays a key role in wireless network. With the development of technology, new requirements are put forward for radio resource management in communication system. This paper aims at the research of two important components of radio resource management:rate allocation and power control.First of all, to resolve the problems of instantaneity, discontinuity and transmission imbalance of high speed data services in the third generation mobile communication system, a rate allocation algorithm based on utility function is proposed. The algorithm achieves a balance between throughput and rate oscillation of data service. Numerical results show that the algorithm can effectively resolve the problem of rate oscillation in wireless network and improve the overall efficiency of the network.Second, improvements on the game theory method of power control are made. As a result, a new utility function is proposed and a power control algorithm based on game theory is developed as well. To verify the effectiveness of the algorithm, the mathematical existence and uniqueness of Nash Equilibrium is derived. Through simulation the convergence characteristics of the algorithm, transmitting power and signal to interference ratio and other properties are analyzed.In addition, considering the impact of both rate allocation and power control on system performance, a resource scheduling algorithm of joint rate allocation and power control is proposed. Numerical results show an efficient improvement of the system performance in poor channel condition. Finally, the complexity of the algorithm is discussed and quantitative analysis is given.