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本文设计了T-S-T数字交换网络的故障检测与诊断算法。其基本思想是把整个网络划分为多个基本模块,在对一个基本模块进行测试或诊断的同时,网络的其余部分仍可执行正常的交换功能。本文假设基本模块中只有一个T接线器或S模块有故障,但在此故障的T接线器或S模块范围内允许多种类型、多重故障同时发生。本文设计的诊断算法其精度可以至少定位至一个T接线器或S模块。每一基本模块的测试成本为(3(2+「(log_2N)/b-1」),12N+4r),诊断成本为(5(2+「(log_2N)/b-1),14N+4r)。两式中第一项表示测试信号的帧数,第二项表示需要改写控制存贮器内容的单元个数,N为时隙数,r为第(?)级T接线器的个数,b则为每个时隙信号的二进码数。
In this paper, T-S-T digital switching network fault detection and diagnosis algorithm. The basic idea is to divide the entire network into a number of basic modules that perform the normal switching functions while the rest of the network is being tested or diagnosed on a basic module. This article assumes that there is only one T-connector or S-module in the base module that is faulty, but allows multiple types and multiple faults to occur simultaneously in this faulty T-connector or S-module. The accuracy of the diagnostic algorithm designed in this paper can be located at least to a T switch or S module. The test cost of each basic module is (3 (2 + log2N / b-1), 12N + 4r), and the diagnostic cost is 5 (2 + log2N / b-1) ) The first of the two equations indicates the number of test signal frames, the second one indicates the number of cells that need to be rewritten to control the contents of the memory, N is the number of time slots, and r is the number of (?) T-switches , b is the number of binary signals for each slot.