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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.
Based on the characteristics of tradeoff such as burstiness, time-varying channel, and power and delay in wireless communication, the scheduling strategy based on delay minimization in broadcast channel is studied. The optimization problem is transformed into Non-constrained Markov dynamic decision-making process, and then use the dynamic programming method to obtain the optimal solution.For the high complexity of the proposed method, a simple strategy is proposed, which only makes decisions based on the current channel status and queue length, And user’s two-dimensional space search algorithm into a simple function operation, the complexity is greatly reduced.The simulation results show that the performance of this strategy is close to optimal.