天地一体化网关设计与实现

Design and Implementation of Gateway in Integrated Space-air-ground Network

采用身份与位置分离、资源与控制分离、控制与转发分离的思想和空间DTN体系结构,提出一体化标识网络构建天地一体化网络,并设计实现天地一体化网关,通过标识和协议转换实现地面网络和空间网络的互联互通。基于一体化标识网络实验平台设计地月通信实验场景,在不同的非对称上下行速率比、误码率情况下进行多次地月数据传输实验,测试所设计的扩展模块WebCache的基本功能。实验结果表明网关能够在一定程度上适应空间链路特性,而WebCache模块能够帮助提高空间链路的利用率。

The proposed identifier-based universal networks aims to decouple the binding of identifier and locator, resource and locator, control and forwarding, and takes advantages of DTN architecture to design an integrated space-air-ground network. In this paper, a gateway was designed and implemented to interconnect terrestrial network and space network, which translated protocol and identifier for packets. Based on the experimental platform of the identifier-based universal networks, the earth-to-moon communication experiment scenario was designed. Multiple earth-to-moon data transmission experiments were carried out with different asymmetric uplink and downlink ratio and bit error rate to test the basic function of the designed extended mod-ule WebCache. The result indicated that the gateway can overcome the constraint of space link and the Web- Cache module can help improve the utilization ratio of space link .