Network-Coded Relaying in Multiuser Multicast D2D Network

D2D communication trades short-range communication for achieving high communication rate and short communication latency. Relay aided D2D communication can further tackle the problem of intermediate obstacles blocking the communication. In this work, multidevice multicast communication via a layer of parallel relay nodes is considered. Two relaying strategies, respectively, called the conventional relaying (CR) and network-coded relaying (NCR), are proposed. The throughput of these two schemes is analytically derived and evaluated through numerical study. Theoretically, NCR shows advantage over CR in twofold: one is higher throughput and the other is requiring less relay nodes and, hence, consuming less aggregate power. Numerical studies verify the analysis and show that the throughput performance gap between the two schemes increases significantly, actually exponentially with the number of devices

Subcarrier and power optimization for device-to-device underlay communication using auction games

An auction-based joint subcarrier and power allocation approach is investigated to improve the performance of device-to-device (D2D) communication underlay cellular networks with uplink (UL) resource sharing. To maximize the system sum rate over the resource reuse of multiple D2D pairs, we introduce a reverse iterative combinatorial auction to formulate the optimization problem. In the auction, cellular channels are viewed as bidders competing to obtain rate increase while packages of D2D pairs and the corresponding transmit power are auctioned as goods in each round. We first give the evaluation of bidders' optimal value for packages, and then explain a descending price auction in detail, also give properties of convergency and low-complexity. The simulation results are finally provided to indicate the efficiency of the proposed auction-based algorithm. ? 2014 IEEE.EI