【作者】 陈志强；

【导师】 温向明；

【作者基本信息】 北京邮电大学 ， 信息与通信工程， 2017， 硕士

【摘要】 能量收割(Energy Harvesting)作为一种使通信设备从射频无线信号中获取能量的技术,对于异构网络中的节能通信具有重要的意义。本文主要研究在大规模部署物联网传感器节点的双层异构网络中,基于能量收割的高能效资源分配问题,以提升异构网络中的能量利用效率。基于此,本文主要研究以下两个方面的问题。针对高能效的异构网络功率分配,把基于能效最优的功率控制问题建模为非合作博弈资源分配问题,并对该博弈的纳什均衡存在性及唯一性进行了证明。接着提出了分布式功率分配方案,并通过迭代求出系统的最优功率分配。该方案提高了系统的能量效率并验证了系统的能量收割的有效性。在上述功率控制方案的基础上,整合了子信道分配方案,研究基于能效的联合子信道和功率分配方案。鉴于操作的可行性和降低复杂度,本文将问题划分为频谱分配和功率控制两个子问题。首先把功率平均分配给每个子信道,再由分配的功率得到子信道分配策略,接着将功率控制建模为非合作博弈问题,利用异构网络非合作博弈功率控制算法分布式解决,最终通过迭代得到联合分配方案。联合子信道与功率分配方案进一步提升了系统能效、收集能量等方面的性能。更多还原

【Abstract】 As a technique that enables communication devices to acquire energy from radio frequency signals, energy harvesting is of great significance to energy-saving communications of heterogeneous networks. In this thesis,energy-efficient resource allocation in energy-efficient heterogeneous networks based on energy harvesting is studied, in order to improve the energy efficiency of heterogeneous networks in large-scale deployments of IoT sensor nodes. Based on this, this paper mainly studies the following two aspects.For energy-efficient heterogeneous network power allocation, the energy-efficiency optimization problem based on power control is modeled as a non-cooperative game resource allocation problem, and the existence and uniqueness of Nash equilibrium is proved. Then, a distributed power allocation scheme is proposed, and the optimal power allocation is obtained by iteration. The scheme enhances the energy efficiency of the system and validates the energy harvesting of the system.Based on the above power control scheme, the subchannel allocation scheme is integrated to study the joint subchannel and power allocation scheme based on energy efficiency. Considering the computational complexity and the feasibility of the operation, we divide the problem into sub-channel assignment and power control. Then, the power control is modeled as a non-cooperative game problem, and the HNNGPC algorithm is used to solve the problem. Finally, the joint allocation scheme is obtained.The power distribution is. divided into sub-channel allocation strategy.Combined sub-channel and power allocation scheme to further enhance the system energy efficiency, energy collection and other aspects of performance.更多还原