基于冗余连接机制的SLE网络协议体系模型

CCSDS(Consultative Committee for Space Data Systems,空间数据系统咨询委员会)SLE(Space Link Extension,空间链路拓展)网络协议体系模型中,一个服务实例只支持建立一个物理通信链路,造成上层应用与下层链路耦合过强,存在一定的安全隐患。针对此问题,设计了基于冗余连接机制的SLE网络协议体系模型,该模型在现有的SLE网络协议体系模型中增加了逻辑连接层,支持单一服务实例同时使用多个物理链路进行空间数据传输,可根据多连接状态重新设计TML(Transport Mapping Layer,传输映射层)状态变换关系以及数据传输模式。该模型能够兼容现有的SLE网络传输体系模型,提高SLE服务的可靠性。

An SLE internet protocol architectural model based on redundant link mechanism

In CCSDS (the Consultative Committee for Space Data Systems) SLE (Space Link Extension) internet protocol architectural model, one service instance only supports one physics communication link.As a result, it causes the coupling of the upper application and the low link too closely and there are certain potential security dangers.A new SLE internet protocol architectural model based on redundant link mechanism is designed to solve the problem.In the model, logical connection layer is added in the current SLE internet protocol architectural model, and one service instance can transfer space data using several physics communication links.The Transport Mapping Layer (TML) state transformation relationship and data transmission mode are redesigned.The model is compatible with the current SLE internet protocol architectural model and increases the reliability of SLE service.