基于功率成本的中继系统最优功率分配

为了降低移动通信网络的功率成本，依据不同的供电方式所确定的不同功率价格，提出了以功率成本为约束条件，以最小中断概率为优化目标的中继系统最优功率分配方法. 主要采用拉格朗日乘子法求解功率分配结果. 仿真结果表明，当各节点功率价格不同时，基于功率成本的最优功率分配与不考虑功率价格的最优功率分配相比，在中断概率相同的条件下，功率成本较小；当各节点的功率价格相差较大时，对比效果更加明显.

Optimal Power Allocation Based on Power Cost in Relay System

Different fashions of power supply have different power prices. In order to reduce power cost in mobile communication network, an algorithm is proposed to minimize the outage probability based on power cost. It subjects to the constraint of power cost. The Lagrange multiplier maximization method is used to solve the problem. Simulation shows that whether dual hop or multi hop transmission, the power prices of different nodes are not the same, the optimal power allocation based on power cost has lower cost compare than the optimal power allocation in the case of uniform outage probability. Whereas, the former has lower outage probability in the case of uniform power cost. The contrast is more obvious with the gap of power prices enlarges.