D2D Communication Resource Allocation And Relay Selection Based On Network Coding

With the development of communication technology,people's material living standards are constantly improving,and users' requirements for data transmission rate are also getting higher and higher.The introduction of D2D(device-to-device)communication technology in cellular networks can improve the spectrum utilization rate and data transmission rate of the communication system,and meanwhile reduce the transmission power of the user terminal.Therefore,the research of D2 D communication system has drawn the attention of researchers.The network coding technology can improve system data throughput.Therefore,this paper will consider the resource allocation and relay selection of D2 D communication system based on network coding technology,and mainly do the following work:1?Under the cellular network,propose a network code-based D2 D communication power control and channel resource link allocation method.Under the premise of guaranteeing the service quality requirements of traditional cellular users,the transmission time of D2 D communication is minimized by optimizing the selection of D2 D transmission power and channel link resource allocation,and an exhaustive search algorithm for optimization problem is given.Simulation results show that the performance of the proposed exhaustive search algorithm is significantly better than that of the stochastic selection algorithm.2?Propose a D2 D relay node selection algorithm based on physical layer network coding technology.Considering that the D2 D relay nodes use physical layer network coding technology to improve the system data throughput while ensuring the service quality requirements of traditional cellular users,the system data transmission rate can be maximized through the relay node selection.Simulation results show that the proposed algorithm can significantly improve network system performance.3?A multicast-based data transmission algorithm for multi-hop D2 D clusters is proposed.Under the control of the cellular network,multiple D2 D users form a D2 D cluster.The terminal devices in the D2 D cluster reuse the spectrum resources of the cellular users.Under the premise of guaranteeing the quality of service(QoS)requirements of the traditional cellular users,the optimal conditions are selected.Following the node,the data transmission rate of the communication system is maximized.The simulation results show that the proposed algorithm can improve the efficiency of data packet transmission in D2 D clusters,resource utilization of terminal nodes in D2 D clusters,and the throughput of channels.When the number of terminal nodes in a D2 D cluster increases,the advantage of this algorithm is also greater.obvious.