Fairness-aware resource allocation for D2D-enabled IoT in NOMA-based cellular networks with mutual successive interference cancellation

Throughput maximization in multi-slice cooperative NOMA-based system with underlay D2D communications

“…Besides, for incorporating D2D communications in cellular NOMA-based systems, different research works have been conducted as in [31,32,33,41,42,43,44]. In [31,32,41], the authors propose D2D communications underlaying cellular CNOMA-based system.…”

“…The authors optimize subchannel and power allocation with the aim of maximizing the overall system throughput. Differently from the aforementioned works, authors in [44,43] study mutual SIC NOMA system between cellular users and underlay D2D pairs. In [43], only one D2D pair shares the uplink channel allocated to one uplink cellular user, while mutual SIC is applied to remove the D2D-BS and cellular users-D2D interference.…”

“…They formulate a joint D2D channel and power allocation to maximize overall D2D throughput while ensuring only a common minimum throughput requirement for cellular users. In contrast to [43], in [44], authors propose a system where multiple D2D pairs share the channel allocated to two downlink cellular users. Their goal is to increase the spectral efficiency and the number of admitted D2D pairs, and keep fairness among them.…”

“…• PJ-NOMA-1, based on an approach in [44], considers fairness-based D2D RBs allocation. As such, (1) CUs are randomly grouped, (2) RBs are reserved to CUs based on their rate requirements, and then (3) each RB allocated to CUs is allocated to the D2D with the minimum achieved throughput ; this considers: (i) a maximum interference threshold on the CUs, and (ii) no constraint on D2D devices QoS.…”

“…We chose PJ-NOMA-1 to compare with because it considers fairnessbased D2D admission and D2D densification, i.e., favoring higher D2D admission at the expense of performance (no D2D QoS requirement during admission). To implement PJ-NOMA-1, (1) CUs grouping, is achieved by Algorithm 1 in our work, (2) RBs allocation equal allocation due to the same requirements each slice, and (3) D2D admission uses the D2D RBs allocation algorithm in [44]. The fairness admission condition i.e., minimum D2D throughput is replaced by the corresponding metric, whether it is an eMBB or URLLC D2D pair.…”