Structured data communication with backwards compatibility

Details Structured data communication with backwards compatibility Structured data communication with backwards compatibility

2006-12-05

2006-12-05

Decady, Albert (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S719000, C714S735000

Reexamination Certificate

active

07146556

ABSTRACT:
Methods, apparatus, and systems are presented for communicating structured data in a system utilizing devices having different data processing capabilities. The methods, apparatus, and systems involve transmitting a unit of data from a first device, wherein the unit of data comprises at least a version-specific portion and a version identifier associated with the version-specific portion, receiving the unit of data at a second device distinct from the first device, processing the version-specific portion at the second device if the second device recognizes the associated version identifier, and disregarding the version-specific portion at the second device if the second device does not recognize the associated version identifier. Disregarding the version-specific portion may comprise examining a data length field in the data unit associated with the version-specific portion to determine a length value and skipping an amount of data corresponding to the length value.

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“Digital Subscriber Signalling System No. 1 (DSS 1)—ISDN User-Network Interface layer 3 Specification for Basic Call Control,” International Telecommunication Union (ITU), Recommendation Q.931, pp. i-317 (Malaga-Torremolinos 1984; modified in Helsinki 1993; ITU 1994).

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