广播信道中基于功率-时延折衷的调度策略  

A scheduling strategy by trade-offing between power and delay in broadcast channel

作　　者：彭烈新[1,2] 盛利民 朱光喜[3] 禹德州 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油集团钻井工程技术研究院,北京100083 [3]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2010年第7期95-98,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划重大项目(2006AA06A103)

摘　　要：利用在无线通信中数据业务的突发性、信道时变以及功率和时延具有折衷关系等特点,研究了广播信道中基于时延约束下功率最小化的调度策略.先将该优化问题转化为非约束马尔可夫动态决策过程,然后用动态规划的方法获得最优解.针对该方法的高复杂度,提出一种简便策略,该策略只根据当前信道状态和队列长度做出决策,从时间和用户二维空间的搜索算法转化为简单函数的运算,复杂度大大降低.仿真结果显示该策略的性能接近最优.In wireless communication,the average power and time delay have the tradeoff relationship for the bursty data and time-varying channel. By this property,the scheduling strategy of minimizing power under delay constraint is proposed in broadcast channel. The problem is first formulated as an unconstrained Markov decision process and solved by dynamic programming. For its high complexity,a simple strategy which is based on the current channel state and queue length is given. It transfers the search algorithm on two-dimensional space in terms of time and the user into a simple function of computing and makes its complexity decreased greatly. Finally,the simulation results show the performance of the simple strategy is approximate to the optimal one.

关 键 词：通信信道 广播信道 资源分配 马尔可夫动态决策过程 时延 功率控制 

分 类 号：TN929.53[电子电信—通信与信息系统]