基于双频通信的空间飞行器自组网动态时隙分配

针对分布式空间飞行器自组网使用传统时分多址(Time Division Multiple Access,TDMA)时隙分配方式时网络时延大、传输效率不高的问题,提出了一种基于双频通信的动态时分多址时隙分配(Dual Frequency Dynamic Time Division Multiple Access,DF-D...

Dynamic time slot allocation of space vehicle ad hoc network based on dual frequency communication

For the problems of large network delay and low transmission efficiency due to applying the traditional time division multiple access(TDMA) slot allocation method in distributed space vehicle ad hoc network,a dynamicTDMA slot allocation scheme based on dual frequency communication(DF-DTDMA) is proposed.The DF-DTDMA scheme adopts dual frequency communication to transmit low-speed broadcast service and high-speed directional service respectively,which improves the network throughput.An embedded slot allocation strategy is proposed at the low-frequency network layer to reduce the packet loss rate of directional service caused by the rapid change of network topology.In the high frequency network layer,a directional collision free slot allocation strategy based on spatial multiplexing is proposed to avoid information collision and improve the reliability of the network.The simulation results show that compared with the traditional TDMA protocol,the DF-DTDMA scheme effectively reduces the aircraft network packet loss rate,improves the network throughput,and has high reliability and flexibility.