Resource Allocation for OFDMA Systems with Selective Relaying and Energy Harvesting
Resource Allocation for OFDMA Systems with Selective Relaying and Energy Harvesting
复制标题
DOI：
10.1109/vtcfall.2014.6966156
复制
发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
Roya Arab Loodaricheh;Shankhanaad Mallick;V. Bhargava
中科院分区：
文献类型：
--
作者：
Roya Arab Loodaricheh;Shankhanaad Mallick;V. Bhargava
本文针对基于选择性用户协作的OFDMA系统，提出了一种基于能量收集技术的联合资源分配算法。当中继对网络有利时，具有良好信道条件和低业务需求的移动的用户可以扮演中继的角色。移动的用户设备能够使用“无线功率传输”技术进行能量收集，并且仅收集的能量用于协作。功率和子载波分配以及中继选择的联合优化问题是一个混合整数非线性规划问题，一般情况下求解难度很大。我们提出了一个新的计划，解决问题的最佳多项式时间复杂度使用对偶分解方法。数值结果表明，该计划的有效性，在能源效率相比，在文献中的其他现有模型。
In this paper, we develop joint resource allocation algorithm for selective user cooperation based OFDMA systems with energy harvesting technology. When relaying is beneficial for the network, mobile users with good channel conditions and low traffic demands can play the role of relays. The mobile user equipments are capable of energy harvesting using "wireless power transfer" technology and only the harvested energy is used for cooperation. The joint optimization problem of power and subcarrier allocation and relay selection is a mixed integer nonlinear program, which is very difficult to solve in general. We propose a novel scheme to solve the problem optimally with polynomial time complexity using dual decomposition approach. Numerical results demonstrate the effectiveness of the proposed scheme in terms of energy efficiency compared to the other existing models in the literature.