Patent ID: 7315694
Filing Date: 2008-01-01
Classification: H04J

Abstract:
1. An apparatus for switching an optical channel overhead in an optical supervisory channel of an optical transport network system, the optical transport network system including an optical supervisory channel reception unit, an optical supervisory channel transmission unit and a central processing unit, the apparatus comprising: a plurality of signal input units for retiming an optical overhead signal received in serial connection from the optical supervisory channel transmission unit, converting a corresponding signal into a parallel data signal, and generating a storage address matching with the corresponding signal; a plurality of signal storage units for storing a parallel optical channel overhead signal according to the storage address information, and outputting a stored optical channel overhead signal information according to a switching address; a switching table storage unit for storing an optical channel overhead switching information received from the central processing unit, transmitting the stored optical channel overhead switching information according to a read storage address to the central processing unit, receiving the switching address with respect to an optical channel overhead signal to be switched and outputted, and generating the storage address of the corresponding optical channel overhead signal according to the switching information stored in switching address; a signal output timing unit for generating the switching address of the corresponding optical channel overhead signal according to an optical channel overhead signal to be outputted, and generating a first timing for aligning a switched data to a corresponding link, a second timing for converting the aligned optical channel overhead signal data into a serial data, and a third timing for outputting the aligned optical channel overhead signal data; a plurality of data alignment units for receiving the switched optical channel overhead signal and aligning the optical channel overhead signal to a corresponding link and channel using the first timing; a drop data alignment unit for receiving a switched drop optical channel overhead signal and aligning a drop optical channel overhead signal using the first timing; and a plurality of signal output units for receiving aligned parallel data from the plurality of data alignment units according to the links, converting the aligned parallel data into serial data according to the second timing, and transmitting the received optical channel overhead signal to the optical supervisory channel transmission unit of the corresponding link.