Cooperative Full Duplex Device to Device Communication Underlaying Cellular Networks

• Published in: IEEE transactions on wireless communications Vol. 16; no. 12; pp. 7800 - 7815
• Main Authors: Tang, Aimin, Wang, Xudong, Zhang, Chi
• Format: Journal Article
• Language: English
• Published: IEEE 01.12.2017
• Subjects: Cellular networks; Device to device communication; Downlink; full duplex; MIMO; power allocation; Relays; Resource management; Wireless communication
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2017.2753785

Recently, device-to-device (D2D) communication and full duplex communication are both considered key technologies for 5G networks. In this paper, two novel cooperative modes are developed for full duplex D2D communication underlaying cellular networks: the network MU-MIMO based mode (N-mode) and the sequential forwarding mode (S-mode). In the N-mode, two D2D users work as network MIMO to forward the data to cellular users and thus leverage the channel diversity. In the S-mode, the spatial distribution of D2D users and cellular users is explored to improve the transmission rate. Based on these modes, two D2D users share the downlink resources with two nearby cellular users simultaneously to achieve both proximity gain and reuse gain. Moreover, these modes are well suited for edge cellular users. To optimize the performance of the two modes, optimal power allocation is conducted by considering the influence of residual self-interference at full duplex radios and the requirements of the minimum transmission rate for both cellular users and D2D users. Simulation results show that, compared with the dedicated mode, the sum rate of cooperative modes in the perfect self-interference cancellation case can achieve 32% overall improvement and about 70% improvement in the scenario with non-edge D2D users and edge cellular users. With residual self-interference at a full duplex radio, the overall performance improvement is reduced to 15%. However, the cooperative modes can still achieve 40% improvement in the scenario with non-edge D2D users and edge cellular users.