2017/05/22 by Sepehr Rezvani, Rezvani, Sepehr, Nader Mokari +3
Engineering · #Energy Harvesting in Wireless Networks #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies
paper · pdf · doi:10.48550/arxiv.1705.07940
This paper considers joint uplink/downlink of an orthogonal frequency\ndivision multiple access (OFDMA)-based heterogeneous network (HetNet)\nconsisting of a single macro base station (MBS), multiple femto base stations\n(FBSs) and access points (APs) where base stations (BSs) can offload data to\nAPs and each mobile user (MU) is able to harvest the received energy using the\nsimultaneous wireless information and power transfer (SWIPT) technique. We also\nsuppose that the harvested energy of MUs are used for their uplink information\ntransmission. We devise a radio resource allocation (RRA) algorithm to maximize\nthe uplink sum data rate of MUs subject to a minimum required downlink data\nrate of each MU and maximum allowable transmit power of each BS, AP, and MU.\nMore specifically, both the frequency division duplex (FDD) and time division\nduplex (TDD) schemes are investigated. The proposed non-convex optimization\nproblems are solved using an iterative algorithm. It is also proved that the\nproposed algorithm converges to a near-optimal solution. Simulation results\nillustrate that the TDD scheme improves the performance compared to the FDD\nscheme. In addition, it is shown that utilizing the data offloading technique\nimproves the uplink sum data rate of MUs compared to the scenario without any\nAP.\n