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Energy-Efficient Transmission Schemes for Cooperative Wireless Powered Cellular Networks

Mao, Sun and Leng, Supeng and Hu, Jie and Yang, Kun (2019) 'Energy-Efficient Transmission Schemes for Cooperative Wireless Powered Cellular Networks.' IEEE Transactions on Green Communications and Networking, 3 (2). 494 - 504. ISSN 2473-2400

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Wireless powered cellular networks (WPCNs) are promising solution for the future wireless communication systems. This paper proposes a system model of WPCNs, in which the cellular users (CUs) and the device-to-device (D2D) users harvest energy from the hybrid access point (HAP). Some D2D users can help the cell-edge CU to relay its uplink/downlink transmission in exchange for the D2D communication opportunity. For achieving green WPCNs, we formulate two energy efficiency (EE) maximization problems for both uplink and downlink transmissions, respectively. The energy beamformer of the HAP and the time resource allocation are jointly optimized subject to the transmission rate requirements and the available energy constraints of CUs and D2D users. Based on the fractional programming theory and semi-definite relaxation (SDR) method, we transform the originally non-convex EE maximization problems into the equivalent convex problems. This allow us to develop the resource allocation algorithm toward global optimization. The optimal solution in semi-closed form is derived based on Lagrangian method. Extensive simulation results are provided to demonstrate the convergence of the proposed iterative algorithm and the EE gain of the proposed system over the other two baselines.

Item Type: Article
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Elements
Date Deposited: 04 Jun 2019 12:02
Last Modified: 04 Jun 2019 12:02

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