面向完整性要求的航空电子全双工交换式以太网可靠性评价参数研究

摘要

To approach a data transmission integrity evaluation method for the avionics full duplex switched Ethernet (AFDX), a new reliability model of AFDX aiming at the actual characteristics based on the concept of integrity is constructed. And the reliability parameters of AFDX for integrity requirements, which reflect ability of transmission performance and different scope of measure, are defined. The reliability of AFDX is divided into data integration reliability, time reliability, order reliability and correctness reliability. Each reliability is also subdivided according to different scope of virtual link. Moreover, all parameters are defined, and the relationship between reliability parameters and performance parameters is determined.%为探讨对航空电子全双工交换式以太网(AFDX)数据传输完整性的评价方法,从完整性概念出发,针对AFDX的实际特征构建了AFDX可靠性模型；从反映网络各类性能传输能力和不同度量范围的可靠性2个方面定义了面向完整性要求的AFDX可靠性评价参数,将AFDX可靠性划分为数据完整可靠性、及时可靠性、次序可靠性和正确可靠性4类,其中,根据对虚拟链路考察范围的不同,每一项可靠性中又包含单条虚拟链路可靠性、指定k条虚拟链路可靠性和全部虚拟链路可靠性；给出了各个参数的定义和数学表达,明确了可靠性参数与性能参数之间的关系.