太赫兹网络中基于中继协作转发的高效双信道MAC协议

针对现有多输入多输出(Multiple-Input Multiple-Output, MIMO)太赫兹通信网络双信道MAC协议存在波束重叠干扰和冗余控制开销等问题，提出了一种太赫兹网络中基于中继协作转发的双信道MAC协议(High Efficiency Dual channel MAC Protocol Based on Relay Cooperative Forwarding in Terahertz Networks, HE-RCFMAC)。HE-RCFMAC协议包含动态帧聚合、基于位置信息自适应协作转发和精简RTS(Request To Send)/CTS(Clear To Send)帧三种机制。经三种机制处理后，可有效提升信道利用率，同时减小控制开销，提高数据传输成功率和整体网络吞吐量。仿真结果表明，所提协议与现有的MIMO太赫兹双信道MAC协议相比，MAC层吞吐量、数据传输成功率和信道利用率分别提升了12.82%、12.28%和8.73%,证明了所提协议的有效性。

High efficiency dual channel MAC protocol based on relay cooperative forwarding in terahertz networks

For the problems of beam overlap interference and redundancy control overhead of dual-channel MAC protocol in existing multi-input multi-output(MIMO) terahertz communication networks,a High Efficiency Dual channel MAC Protocol Based on Relay Cooperative Forwarding(HE-RCFMAC) in terahertz networks is proposed.The HE-RCFMAC protocol includes three mechanisms,dynamic frame aggregation,adaptive cooperative forwarding based on location information and simplified Request To Send(RTS)/Clear To Send(CTS) frame.The three mechanisms can effectively improve the channel utilization,reduce the control overhead,improve the success rate of data transmission and the overall network throughput.Simulation results show that compared with the existing MIMO dual-channel MAC protocol,the throughput,data transmission success rate and channel utilization rate of the MAC layer are improved by 12.82%,12.28% and 8.73%,respectively,which proves the effectiveness of the proposed protocol.