论文部分内容阅读
1.位交换容错技术 在交换机中存储器(RAM或ROM)是易出故障的部件。 位交换技术是将存储器中位的顺序重新排列完成的。在输出字的自动奇偶检测基础上,以程序自动判别故障位位置后,以冗余列代换故障列,既不需使用校正码,又不需作结构上的改变,就可显著地提高存储器的平均故障间隔时间MTBF,提高其可靠性。这种方法可扩充到多个冗余备用列,提高容错能力。对于只读存储器,将已查出的某位缺陷,以一个正确位(“0”或“1”),代替被阻断的差错位,达到校正的目的。
1. Bit-switching fault-tolerant technology Memory (RAM or ROM) in the switch is a faulty component. Bit-swap techniques rearrange the order of bits in memory. On the basis of the automatic parity detection of the output word, after the program automatically determines the position of the fault bit, replacing the fault column with a redundant column does not require the use of a calibration code and does not require structural changes, so that the memory The mean time between failure (MTBF) improves its reliability. This method can be expanded to multiple redundant spare columns, improve fault tolerance. For read-only memory, a defect that has been detected is corrected for the correct position (“0” or “1”) instead of the blocked error bit.