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针对高延迟、高误码和链路频繁中断的空间信息网络,设计了能够适应空间网络环境的容延迟网络(DTN)网关,在OPNET仿真平台下对网关进行建模,并对基于该网关的空间信息网络进行仿真.DTN协议体系以“存储转发”为核心思想,结合空间数据系统咨询委员会(CCSDS)提出的适用于空间环境的传输层协议和数据链路协议,以保证空间网络数据传输的可靠性.仿真结果表明,使用DTN网关能够显著降低空间信息网络数据传输的丢包率,增强通信的可靠性,表现出良好的适用性.
For the spatial information network with high delay, high bit error rate and frequent link interruption, a capacity-tolerant delay network (DTN) gateway that can adapt to the space network environment is designed. The gateway is modeled under the OPNET simulation platform. Spatial information network.DTN protocol system regards “store and forward ” as the core idea, combined with the transport layer protocol and data link protocol proposed by the Space Data System Advisory Committee (CCSDS) for space environment to ensure that the spatial network data The simulation results show that using DTN gateway can significantly reduce the packet loss rate of spatial information network data transmission and enhance the reliability of communication, showing good applicability.