一种基于会话管理的星间链路拥塞控制机制

LTP协议是一种适用于空间延迟容忍网络的传输协议，通过建立会话传输数据。针对星间链路数据传输过程中出现的拥塞问题，提出了一种基于LTP协议会话管理的拥塞控制机制SMCC，通过计算连通时间内会话开启的最大数量，限定LTP协议会话交付的数据量，减少链路的冗余数据，避免拥塞的发生；当拥塞不可避免时，通过下跳卫星对会话确认的反馈，调节会话窗口的大小，解除链路拥塞。仿真结果表明，和同类型的拥塞解除机制DCM、TBCC、FM相比，SMCC处理拥塞的效率最高，更适应星间链路数据传输环境。

Congestion Control Mechanism of Inter Satellite Link Based on Session Management

LTP is a suitable transport protocol for delay tolerant network in space to transfer data through sessions. For congestion problems of inter satellite links, this paper proposes a congestion control mechanism based on LTP session management SMCC, avoiding congestion by calculating the maximum amount of sessions through connectivity, limiting the amount of data, and reducing redundant data. When congestion is inevitable, adjusting the size of the conversation window of LTP sessions to lift the link congestion through the feedback from the next hop satellite. Simulation results show that SMCC processor is more efficienct and more suitable for inter satellite link, compared with other similar type of congestion control mechanism DCM, TBCC, FM.