An optimal resource reuse strategy for QoS-awared device-to-device communications

Abstract

Device-to-device (D2D) communication is a promising technique for improving the spectral efficiency of cellular networks. In this paper, we consider joint optimization of pair assignment and power control for D2D pairs reusing downlink cellular resources, and aim to maximize the aggregate rate of D2D communications while guaranteeing the quality of service (QoS) of the cellular users. By transforming the original difficult problem into an equivalent form, we are able to analytically characterize the optimal power control and pair assignment for the D2D and cellular users. Based on these results, we then propose an efficient algorithm to obtain the jointly optimal power control and pair assignment strategy. The numerical results show the superiority of our proposed method over existing ones.

Channel selection and power allocation for device‐to‐device enabled cellular networks

“…Channel and power allocation is performed in two phases for overall sum rate maximisation with guaranteed data rate for each CU in [11]. Sum rate of D2D is maximised while assuring minimum data rate of shared CUs in [12][13][14][15][16][17][18].…”

“…Power allocation for N CUs and a single D2D pair over N uplink channels is performed in [14]. However, the authors in [15,16] presented similar work, but they preferred to reuse downlink channels rather than uplink with multiple cellular and DUs. They proposed an algorithm that optimises channel and power allocation of D2D pairs and CUs jointly by updating Lagrange multipliers, iteratively.…”

“…Moderate interference scenario: When interference at CU is moderate and p i j d can be increased but P dmax j is not large enough (14). In this case, optimality can be achieved when equality holds in (15). When…”

Semi‐distributed resource management for underlay D2D communication with user's cooperation

“…Majority of the work related to resource allocation for D2D is dedicated to the centralized approaches in the literature . Overall sum rate of D2D and CU is maximized by proposing a greedy channel assignment for downlink and uplink D2D in Zulhasnine et al while considering the quality of service (QoS) of each user.…”

“…Apart from these, multiple channels are assigned to D2D pair in previous studies but a channel is not reused among multiple D2D pairs. An optimal joint channel and power optimization for downlink D2D is proposed in previous studies to maximize D2D sum rate while preserving the performance of CU. A QoS aware resource allocation is done in Gour and Tyagi where a D2D is assigned multiple CU's channel; however, the maximum number of channel to each D2D is constrained.…”