Method and apparatus for end-to-end clear transport protocol

Details Method and apparatus for end-to-end clear transport protocol Method and apparatus for end-to-end clear transport protocol

2005-11-30

2010-06-29

Brown, Christopher J (Department: 2439)

Cryptography

Facsimile cryptography

Synchronization

C370S310000, C713S165000, C380S270000

Reexamination Certificate

active

07747017

ABSTRACT:
A communication system provides a clear channel link for transport of encrypted payload across a network of the communication system. When a source access network receives, via an air interface, a frame that is formatted pursuant to an air interface protocol and that comprises encrypted payload, the source access network demultiplexes the frame to separate the encrypted payload and assembles an Intersystem Link Protocol (ISLP) frame that comprises the encrypted payload. The source access network adds a link layer header to the ISLP frame that identifies one or more of frame type information and a sequence value associated with the frame and conveys the ISLP frame and added header across the network, for example, to a destination access network. Based on the added header, the source and destination access networks are able to perform clear channel synchronization.

REFERENCES:
patent: 5936948 (1999-08-01), Sicher
patent: 6112084 (2000-08-01), Sicher et al.
patent: 2001/0055292 (2001-12-01), Chai et al.
patent: 2003/0123411 (2003-07-01), Kim
patent: 2004/0203606 (2004-10-01), Souissi et al.
http://www.3gpp2.org/public—html/specs/N.S0019-0—v1.0.pdf, “Intersystem Link Protocol”, 3GPP2, Jan. 28, 2000.

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