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US 6,636,529 B1Granted
Semi transparent tributary for synchronous transmission
AssigneeNortel Networks Limited
InventorsDavid M Goodman, Jayne Brady, Chris Murton
Life of this patent
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AssigneeNortel Networks Limited
InventorsDavid M Goodman, Jayne Brady, Chris Murton
Estimating the term…
An interface for converting a variety of incoming digital signals into SDH/SONET format for transmission on a synchronous digital network, by identifying the line code of the incoming digital signal, without identifying the information for OSI layer 2 or 3 processing, i.e. format of each packet. Headers are used to encapsulate incoming packets, and enable packets to be discriminated at the receiver. Advantages of performance monitoring capability and transparency are combined. Identifying line codes enables a greater degree of error detection, than a bit based interface. Also synchronisation can be simpler since line codes for padding can be added or deleted more easily than adding or subtracting bits. The interface is semi-transparent in the sense that identification of line codes limits the interface to those formats that use identifiable line codes, but without limiting to a particular OSI layer 2 or 3 frame format.
A sending interface for converting an incoming digital signal into a format for transmission on a synchronous digital network, the incoming digital signal having a group of bits coded by a predetermined line code, the incoming digital signal also carrying information for OSI layer 2 or 3 processing, the sending interface comprising:
A sending interface for converting an incoming digital signal into a format for transmission on a synchronous digital network, the incoming digital signal having a series of packets, and a group of bits coded by a predetermined idle code separating the packets, the sending interface comprising:
A receiver interface for recovering an incoming digital signal from a signal of a format used for transmission over a synchronous digital network, the incoming digital signal having a group of bits coded by a predetermined line code, the incoming digital signal also carrying information for OSI layer 2 or 3 processing, the receiving interface comprising:
A method of converting an incoming digital signal into a format for transmission on a synchronous digital network, the incoming digital signal having a group of bits coded by a predetermined line code, the incoming digital signal also carrying information for OSI layer 2 or 3 processing, the method comprising the steps of:
A SDH/SONET network element comprising a sending interface for converting an incoming digital signal into a format for transmission on an SDH/SONET network, the incoming digital signal having a group of bits coded by a predetermined line code, the incoming digital signal also carrying information for OSI layer 2 or 3 processing, the sending interface comprising:
Apparatus for detecting transmission errors by a synchronous digital network used to transmit an incoming digital signal, the apparatus comprising a receiver interface for recovering the incoming digital signal from a signal of a format used for transmission over the synchronous digital network, the incoming digital signal having a group of bits coded by a predetermined line code, the incoming digital signal also carrying information for OSI layer 2 or 3 processing, the receiving interface comprising:
Dependencies are inferred from the claim text.