Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1996-03-29
1999-09-07
Vu, Huy D.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
H04J 312
Patent
active
059497823
ABSTRACT:
A processor of an ATM switch is adapted for inserting a call correlation tag (CCT) information element (parameter) into all call initiating messages (e.g., CALL SETUP or INITIAL ADDRESS) of which it is the source. The CCT is unique over a period of time such that two ongoing calls originating at the same interface cannot have the same CCT. The CCT is stored in memory at the ATM switch with other relevant information regarding the call. After the call initiating message is forwarded through the network, the processor of the destination ATM switch obtains the CCT and stores it in memory with other relevant information regarding the call. After the call is terminated, the stored information along with the CCT is forwarded by each processor to a billing management center. According to one preferred aspect of the invention, the CCT assumes the form of a thirty-two bit value contained in an information element (IE). According to another preferred aspect of the invention, other messages such as CONNECT, ADD PARTY REQUEST, and ADD PARTY ACKNOWLEDGE, may also be provided with the same CCT. The invention applies to both UNI and B-ISUP signaling.
REFERENCES:
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patent: 5617422 (1997-04-01), Litzenberger et al.
David Wells, "Proposal for a Call Correlation Tag", ATM Forum, Technical Committee Working Groups, Contribution ATMF/95-0632, on or about Jun. 5, 1995.
Miyazaki, "Q.2726.3 Final Text, Broadband ISDN User Part, Network Call Correlation Identifier", ITU-Telecommunication Standardization Secotro Study Group 11, on or about Jan. 29, 1996.
ITU-T Standards document Q.2931.
ATM Forum Specification UNI-3.1.
ITU-T B-ISUP Signaling Protocols in Standard Q.2761.
ITU-T B-ISUP Signaling Protocols in Standard Q.2762.
ITU-T B-ISUP Signaling Protocols in Standard Q.2763.
ITU-T B-ISUP Signaling Protocols in Standard Q.2764.
BISDN Inter Carrier Interface (B-ICI) Specification Version 2.0 (Integrated), ATM Technical Forum, Dec. 1995.
Gallagher Thomas A.
General Datacomm, Inc.
Gordon David P.
Jacobson David S.
Vu Huy D.
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