Energy Harvesting Aided Device-to-Device Communication Underlaying the Cellular Downlink

Shruti Gupta, Rong Zhang, Lajos Hanzo
2017 IEEE Access  
The specific family of Device-to-Device (D2D) communication underlying downlink cellular networks eliminates the reliance on base stations (BS) for its transmission by allowing direct transmission between two devices in each other's close proximity that reuse the cellular resource blocks for enhancing the attainable network capacity and spectrum efficiency. By considering downlink resource reuse and energy harvesting (EH), our goal is to maximize the sum-rate of the D2D links, without degrading
more » ... the quality of service (QoS) requirement of the cellular users (CUs). We formulated a sum-rate maximization problem of joint resource block and power allocation for the D2D links, which resulted in a non-convex problem that was then transformed into a more tractable convex optimization problem. Based on the results of our Lagrangian constrained optimization, we propose joint resource block and power allocation algorithms for the D2D links, when there is non-causal (off-line) and causal (on-line) knowledge of the EH profiles at the D2D transmitters. The performance of the algorithms is quantified using simulation results for different network parameters settings, where our online algorithm performs close to the upper-bound provided by our off-line algorithm.
doi:10.1109/access.2016.2600242 fatcat:pztdjjchqbc77nmnj6jwzjgd4e