EXCHANGING METHOD, EQUIPMENT AND SYSTEM FOR THE OPTICAL ACCESS SYSTEM

摘要

An exchanging method, equipment and system for the optical access system are provided. The station side of the optical access system includes the first interface and the second interface. The first interface is coupled to the working path, and the second interface is coupled to the standby path. The method includes that of: obtaining the time of two time points and/or the time difference between the two time points at which the downlink frame head is sent from the first interface and the uplink frame head is received from the second interface; obtaining the adjusting time between the first interface and the second interface according to the time of two time points and/or the time difference between the two time points; adjusting the time for transmitting the frame head at the second interface according to the adjusting time, and performing the exchanging from the first interface to the second interface. During the normal communication, by using the embodiment of the invention, the downlink frame head of the standby interface could be adjusted. It is avoided that the ONU should enter the state of re-registering and distance measuring. A great lot of exchanging time is saved, and the ONU would not be offline, therefore there is almost no impact on the service.