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Journal of University of Chinese Academy of Sciences ›› 2022, Vol. 39 ›› Issue (6): 845-852.DOI: 10.7523/j.ucas.2021.0003

• Research Articles • Previous Articles    

Resource allocation for SWIPT-D2D communication underlaying cellular networks

YANG Te, HONG Peilin, LI Runzhou   

  1. Laboratory of Information Network, University of Science and Technology of China, Hefei 230027, China
  • Received:2020-11-06 Revised:2021-01-08 Online:2022-11-15

Abstract: As an important radio frequency energy harvesting technology, simultaneous wireless information and power transfer (SWIPT) enables the energy-limited equipments continuously harvest radio frequency energy without interruption of communication. For the device-to-device (D2D) communication system underlaying cellular network, we consider the resource allocation problem when D2D receivers use power-splitting technology to decode information and harvest radio frequency energy simultaneously. In order to ensure the high information decoding rate of D2D receivers under high energy harvesting requirement, we propose a one-to-many spectrum multiplexing scheme for D2D communication. In this scheme, D2D devices are allowed to multiplex multiple cellular uplink spectrums for communication, and all user equipments in the network are used as distributed radio frequency energy sources to charge the D2D receivers. In this scenario, the system resource allocation including spectrum matching, power control and power-splitting control is jointly optimized to maximize the sum communication rate of D2D under the condition of ensuring the energy harvesting requirement of D2D receivers and the rate requirement of all communication links. The above optimization problem is a non-convex Mixed-Integer Nonlinear Programming (MINLP) problem, which is difficult to obtain the optimal solution. Therefore, we propose a two-layer resource allocation algorithm based on greedy thought and convex approximation theory. Simulation results show that compared with other resource allocation strategies, the proposed algorithm can significantly improve the sum rate of D2D communication under the premise of meeting the energy and communication rate requirements of user equipments.

Key words: D2D communication, SWIPT, radio frequency energy harvesting, resource allocation

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