Patent ID: 8982712
Filing Date: 2015-03-17
Classification: H04B,H04J

Abstract:
1. A de-mapping method for an Optical Transport Unit (OTU) frame, comprising: setting a receiving reference clock and a de-mapping path according to a highest priority of an OTU frame mapping mode of a local device; receiving an OTU frame of an opposite device by using the receiving reference clock and the de-mapping path; determining a de-mapping priority of the OTU frame according to a clock recovery result of the received OTU frame and a customer service alarm instruction configured to judge whether data is received correctly, wherein the step of determining further comprises judging whether the clock recovery result of the OTU frame is signal loss; and if the judgment result is no, obtaining the customer service alarm instruction of the OTU frame; wherein the step of determining further comprises if the customer service alarm instruction is a service failure alarm, increasing the de-mapping priority of the OTU frame by a level, and performing a clock recovery procedure according to a receiving reference clock corresponding to a de-mapping priority of the OTU frame which is increased by a level, and if the customer service alarm instruction is an expected alarm state of a client layer, determining that the current priority is the de-mapping priority of the OTU frame; and de-mapping the OTU frame of the opposite device by using a receiving reference clock and a de-mapping path corresponding to the determined de-mapping priority of the OTU frame.