Energy-Efficient Channel Reusing for Device-to-Device Communications Underlying Cellular Networks

Abstract

Energy efficiency (EE) has become an increasingly important issue in Device-to-Device (D2D) communications since wireless terminals are hand-held equipments with limited battery life. In this paper, an energy-efficient channel reusing scheme for multi-D2D links is proposed. We first analyze the EE of a single D2D link in both non-cooperative mode (NCM) and cooperative mode (CM), and prove that the EE of the D2D link is mainly determined by the location of the cellular user equipment (CUE) that shares resource with the D2D pair. On this basis, a locationbased algorithm (LBA) is proposed to select the optimal CUE for each of the D2D pairs, aiming to maximize the sum EE of all D2D links. Numerical results show that the proposed LBA could effectively improve the overall EE of the D2D system while guaranteeing the target rate of each D2D link. Moreover, the proposed LBA does not require the channel state information (CSI) of all the involved links, which could significantly reduce the feedback overhead and computational complexity.

Performance Tradeoff Between Energy Conservation and User Fairness for D2D Communication Underlaying Cellular Networks

“…s.t., Eqs. (19), (20), (22) Proposition 3 P 4 is a convex optimization. Proof It's readily to see that the objective function and all constraints of P 4 are linear in…”

“…[15] took into account QoS protection while optimizing ST, but it omitted the design of feasibility check [10][11][12]16,17] and the coupling among the channels reused by a same D-link [13,14] . In addition, due to the limited lifetime of User equipment (UE), EC is drawing incremental attention [17−24] , but prior works suffered from the absence of feasibility check [18−23] , the lack of full QoS protection [19−23] and the insufficient resource utilization [17,21,22,24] . Besides, the tradeoff between EC and SC was omitted in Refs.…”

“…Besides, the tradeoff between EC and SC was omitted in Refs. [17][18][19][20][21][22][23][24]. Moreover, Refs.…”

Optimizing Energy Efficiency in Multidevice Communication with Artificial Intelligence Assistance

“…In [15], the authors propose an energy-efcient channel reusing scheme for multi-D2D (device-to-device) links in communications. It frst analyzes the energy efciency of a single D2D link in both noncooperative mode (NCM) and cooperative mode (CM), showing that the D2D link's efciency is mainly determined by the location of the cellular user equipment (CUE) that shares resources with the D2D pair.…”