Abstract: The mathematical model of minimizing the average power of base station under delay constraint is proposed for multi-user system in CDMA downlink. The problem is formulated as an unconstrained Markov Decision Process(MDP) and solved by dynamic programming. And the proposition that two users power-delay surface is a convex surface is proved, which indicates that in CDMA downlink multi-user system, increasing the delay can save power and average delay and power still has a convex function. Simulation result shows the relationship is established correctly.

Key words: CDMA downlink, optimization schedule, Markov Decision Process(MDP), delay, power

摘要： 为CDMA下行链路多用户系统建立在用户时延限制下使基站平均功率最小的数学模型，将该优化问题转化为非约束Markov决策过程，用动态规划的方法获得最优解，并证明2个用户的功率-时延曲面是一个凸曲面。仿真结果证明，在CDMA下行链路多用户系统中，增加时延能节省功率且平均时延与功率仍具有凸函数关系。

关键词: CDMA下行链路, 最优化调度, Markov决策过程, 时延, 功率

CLC Number: 

• TP391