| 摘要 |
<p>The invention relates to a replicating method for a switching system, the system comprising switching means (1) and at least one active control unit (21, 22, 23, 25) connected to a data bus (22) and having, permanently or when necessary, a replicating hot-standby spare unit connected to said data transmission means, so that the switching control process performed by the active control unit includes predetermined subprocesses communicating with each other, and the spare unit performs similar subprocesses of the switching control in parallel. In the invention, the subprocesses of the active control unit are performed in predetermined asynchronous groups, and the subprocesses of the spare unit in corresponding replicating asynchronous spare groups sending messages via said data bus (22). The relative consistency of the active control unit and the spare unit is guaranteed by sending the messages sent to the subprocess group of the active control unit via the data bus (22) substantially also to the corresponding replicating spare group of the spare unit. <IMAGE></p> |
