一种支持QoS特性的SpaceFibre接口设计与实现

Design and Implementation of a SpaceFibre Interface with Quality of Service Characteristics

为了满足航天星载系统中音视频、图像等多样化、复杂化业务数据的无冲突高速传输,以及满足控制信息的实时处理,并实现星载系统SpaceWire-SpaceFibre网络构建,提出了一种支持服务质量(QoS)特性的SpaceFibre接口设计与实现方案。该SpaceFibre接口支持SpaceFibre协议和SpaceWire包层协议,支持带宽预留、优先级和时隙调度QoS机制配置,支持64个时隙和系统时隙同步更新,可同时支持4种业务数据的无冲突和确定性传输,带宽利用率达90%以上。

In order to meet the collision-free high-rate transmission of audio and video, images and other complicated data, to meet real-time processing of the key control information, and to implement SpaceWire-SpaceFibre networks construction in Spaceborne systems, a design scheme and implementation of SpaceFibre interface with QoS characteristics was presented. The realized SpaceFibre interface supported SpaceFibre standard, SpaceWire packet-layer protocol, bandwidth reservation, priority, and configuration of timeslot-scheduled QoS mechanism. The timeslot-scheduled QoS supported 64 timeslots and synchronous update of system timeslot. The collision-free and deterministic transmission of 4 kinds of service data could be implemented in SpaceFibre interface, with link bandwidth utilization-rate more than up to 90%.