文档介绍：
电网与新能源联合供电的蜂窝中继系统的
功率分配算法研究#
邱现彦,廖学文
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(西安交通大学电子与信息工程学院,西安 710049)
摘要:为提升蜂窝中继系统的能量效率,本文研究了多个传输时隙下电网与新能源联合供电
的中继系统的功率分配算法。综合考虑电网消耗总功率与和速率两个方面,构造了效用函数。
基于信道状态信息和获取的能量信息的时变性,对理想和实际两种情况分别提出了最优的功
率分配策略,证明理想情况下的优化问题为准凹优化的形式,通过二分法得到了最优的传输
功率。实际情况下,将最优化问题转化为线性效用函数的次优功率分配的形式,采用动态规
划 Bellman 等式的方法得到了次优的传输功率。最后,本文将提出的两种功率分配算法与传
统功率分配算法进行了系统性能的仿真与比较。仿真结果表明,本文提出的两种算法系统的
能量效率优于传统方案。
关键词:中继系统;功率分配;动态规划;绿色通信
中图分类号:
Research on Power Allocation Algorithms in Power Grid
and New Energy Jointly Powered Cellular Relay Systems
Qiu Xianyan, Liao Xuewen
(Xi'an Jiaotong University, Xi'an 710049)
Abstract: In order to improve the energy efficiency of cellular relay systems, we study the
problem of power allocation over finite time slots with grid power and new energy jointly
powered system. Considering the total grid power consumption and sum rate, we propose a new
utility function. Since both channel conditions and energy harvesting are time varying, we propose
not only the optimal power allocation algorithm in the ideal scenario but also the one in the actual
scenario. The optimization problem of the ideal case is proved to be a quasi-concave optimization
problem which can be solved by the bisection method. In the actual case, the optimization problem
is transformed into a linear utility function in the form of the suboptimal power allocation, and the
dynamic programming Bellman equation gives the solution. Finally, the performance of these two
proposed power allocation algorithms and the traditional algorithm are simulated pared.
Simulation results show that the energy efficiency of the system in two proposed algorithms are
better than that of the traditional algorithm.
Keywords: Relay Systems; Power Allocation; Dynamic Programming; munication
0 引言
目前随着通信的飞速发展,蜂窝移动通信网络规模的不断扩大以及通信要求的不断提
高,通信使得人们的生活更加便捷的同时,总体耗能过大问题也日益突出[1]。从运营商角度,
通过节能手段降低网络能耗已成为节省运营成本的重要手段。在能源日益短缺的今天,绿色
通信成为一个热点研究问题。新能源是解决绿色通信的一个非常重要的方法[2]。众所周知,
在边