Protocol extensions for telecommunications network systems and method

• US 6,822,942 B1
• Filed: 08/23/2000
• Issued: 11/23/2004
• Est. Priority Date: 11/19/1999
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Zave, Pamela, Jackson, Michael A.
• Primary Examiner(s): Hsu, Alpus H.
• Assistant Examiner(s): HAN, CLEMENCE S
• Application Number:
  US09/644,461
• Time in Patent Office: 1,553 Days
• Field of Search: 370/351, 370/254, 379/221.15, 379/229
• US Class Current: 370/254
• CPC Class Codes: H04Q 3/0041 involving techniques for avoiding interaction of call service features

Abstract

A distributed features system is disclosed which permits a telecommunication network to accommodate the creation of open multimedia services. In accordance with an embodiment of the present invention, protocol extensions for a distributed feature system are disclosed which accommodate a broader range of media choices than conventional telephony. Protocols are disclosed for internal calls between modules in the distributed feature system that permit a module to open and close any number of media channels to be utilized in the communication usage. A protocol is also disclosed for internal calls between modules in the distributed feature system that is more appropriate for a packet-switched reference implementation.

Claims

1. A telecommunication network system comprising:

a plurality of feature modules;

a plurality of interface modules;

communication channels connecting the modules further comprising one or more media channels that can be established between the modules;

means for dynamically assembling the feature modules in a graph that connects interface modules that are participating in a communication usage and wherein one or more media channels can be established between modules in the graph and connected within each feature module so that one or more media paths can be established along a path that follows the graph between interface modules.

2. The telecommunication network system of claim 1 wherein the media channels may be opened and closed freely.

3. The telecommunication network system of claim 1 wherein the protocol used to open a media channel is nested inside and separate from the protocol used to connect the feature modules in the graph.

4. The telecommunication network system of claim 1 wherein the graph connecting the interface modules is constructed piecewise while the media paths are constructed end-to-end.

5. The telecommunication network system of claim 1 wherein a customer can choose the media channels utilized in the communication usage.

6. The telecommunication network system of claim 5 wherein the customer can be presented with a plurality of requests for each media channel separately and can respond separately to the requests.

7. The telecommunication network system of claim 1 wherein status signals are exchanged between modules reflecting status of a party to the communication usage.

8. The telecommunication network system of claim 7 wherein there is no constraint on the order or number of status signals.

9. The telecommunication network system of claim 8 wherein a party to the communication usage can cause the issuance of a status signal declining to open a media channel in addition to a status signal indicating a failure to respond to the request to open the media channel.