Abstract: As the economy and various social undertakings improving in recent years, the communication demand for people has been increasing, more and more high-speed transports provide important information service in the daily life. However, mobile communication systems have gradually faced the problem that communication channel is not enough and transmission rate is insufficient. This topic will combine the basic utility function of power control technology with the station assignment of power control technology. Voice services for the system can be met the requirements only by using power control. But for data services, the data rate may have a sudden changing characteristic. Therefore, the inappropriate allocation of rate may lead to the waste of resources and the decline of quality of wireless service. This topic will focus on the rate assignment on the downlink for WCDMA data users. The algorithm maps the QoS of the data users into a family utility function which is reflected the total throughput and the fairness, delay (finite retransmission times), error rate and the total system transmission power are as the constraint conditions. And the total effectiveness of all users is as the goal, we gain the user’s SIR targets and data rates. The algorithm has a hierarchical structure, in which data-rate of mobile station is adjusted according to the feedback from the base station, and SIR target is adjusted by the mobile station according to their local information.

Brief Biography of the Speaker:
CP. Ji graduated from the Huaibei Normal University, China, in 1993. He is now the professor of Liaoning Technical University. As the senior Member of WASE and IACSIT, His research interests are computer communication & networks, wireless communication, digital signal processing, computer science and technology. He is the author of more than 70 papers published in international journals and conference proceedings, and invited book chapters. Meanwhile, he is also the referee for journals, conferences and research proposals.