1394总线关键协议分析与研究

Analysis and research of 1394 bus key protocol

在新一代飞机安全关键/任务关键系统中,对总线的实时性、确定性、可靠性提出更高的要求。1394总线协议通过规范强制根节点、静态分配通道号、纵向奇偶校验、STOF同步、异步流包通信及发送/接收端电气特性指标等约束,保证了总线传输的高实时、高确定及高可靠性。针对1394总线在安全关键/任务关键系统中的应用需求,分别从总线拓扑结构、总线包格式和总线可靠性三方面对1394总线关键协议进行详细分析与研究,为1394总线设计、实现及系统应用奠定了理论基础。

In a new generation of aircraft safety- critical and mission- critical systems, real- time, certainty and reliability of bus are put forward higher requirements. To ensure the high real- time, high certainty of a bus transmission and high reliability, 1394 bus protocol specification forced constraints such as the root node, the static assignment channel number, vertical parity check, STOF syn-chronous and asynchronous flow packet communication and send / receive electric property indexes. Aiming at application demand of1394 bus in the safety- critical and mission- critical system, detailed analysis and research on the 1394 bus key protocol are given respectively from the bus topology, bus packet format and the reliability. Then it established theoretical foundation for design, implementation and system application of 1394 bus.