Patent ID: 7630399
Filing Date: 2009-12-08
Classification: H04L

Abstract:
1. An apparatus for recognizing a Frame Check Sequence (FCS) in Generic Framing Procedure (GFP) encapsulation mode, comprising: a Frame Delimitation Module, a Frame Header Identification & Stripping Module and an FCS Stripping Module, wherein, the Frame Delimitation Module is used for receiving GFP data stream, removing the Core Header field of the GFP frame, generating the delimiting signals indicating the head of the frame, the end of the frame and whether the frame data is valid, respectively, and outputting to the Core Header Identification and Stripping Module the GFP data stream accompanied by the delimiting signals with the Core Header field removed; the Core Header Identification and Stripping Module is used for removing the Payload Header of the GFP frame, generating a Payload FCS Identification (PFI) signal indicating whether the GFP frame contains an FCS field according to a sop signal in the delimiting signals indicating the head of the frame, and outputting to the FCS Stripping Module the GFP data stream accompanied by the PFI signal with the Payload Header removed; and the FCS Stripping Module is used for judging whether the GFP frame contains an FCS field according to the PFI signal received from the Core Header Identification and Stripping Module, if yes, determining the position of the FCS field according to the PFI signal and the delimiting signals, and removing the FCS field.