可变扩频增益功率速率的联合控制

Integrated Power and Rate Control in CDMA System with Variable Spreading Gain

在提供多媒体业务的3G系统中,不同的业务传输速率在传输过程中是可变的,所以用功率速率联合控制来处理第三代移动通信系统中的无线资源分配问题。在可变扩频增益CDMA系统中,用户根据其无线环境确定其传输速率和发射功率,基于博弈论提出了使用户净吞吐量最大化的功率速率联合控制方案。对信干比要求不严格的业务,可依照一定的概率来决定是否调整用户数据传输速率,仿真表明这样可使用户的传输速率进一步提高,更有效地利用系统资源。

In 3G system which provides multimedia services,different business has different requirement to transmission rate and this is usually variable.So it is very difficult for the rate control to meet need of the system.So radio resource management is actualized by integrated power and rate control.In variable spreading gain CDMA system,users determine appropriate transmission rate according to specific wireless situations.So based on the game theory,power and rate control to maximize users’ net has been put forward.By simulation it is found that radio resource is assigned effectively in this way.For some services which don’t have strict SIR demand,we can adjust their data rate based on a probability value to effectively manage radio resource.