An interference cancellation scheme for D2D multi-link communication underlaying cellular network

Abstract

Device-to-device (D2D) communication has attracted much attention in the field of mobile networks for local area connectivity due to its spectral efficiency, high bit rate support and low power consumption. A group of D2D capable devices, called a cluster, can be connected through multiple links by sharing common resources. This may however result in co-channel interference between them. In this paper, we propose a novel orthogonal precoding vector selection method for reducing co-channel interference and thus maximizing the achievable data rate for each device in the cluster. The proposed method can be employed for uplink and downlink transmissions of both cellular and D2D communications. The analysis of the proposed method is carried out for the case where the cellular channel resource is being shared by single and multiple D2D links. Initially, the results via simulations are compared with the theoretical analysis and the performance of the proposed method is evaluated and compared for different resource sharing modes. The results show that our proposed method enhance the system throughput when compared with the conventional precoding vector allocation method. Finally, the paper illustrates that the introduction of cluster head in a cluster can save battery life of devices.