Method of avoiding or minimizing cost of stateful connections between application servers and S-CSCF nodes in an IMS network with multiple domains

• US 20060291484A1
• Filed: 06/24/2005
• Published: 12/28/2006
• Est. Priority Date: 06/24/2005
• Status: Active Grant

• Current Assignee: Aylus Networks Incorporated
• Original Assignee: Matrix PT LLC, North Bridge Venture Partners V-A, L.P., North Bridge Venture Partners V-B, L.P., Weston & Co. VII, LLC
• Inventors: Dorbala, Prasad S., Naqvi, Shamim A., Ganmukhi, Mahesh N., Wong, Ellis L.
• Granted Patent: US 7,864,936 B2
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/142 Managing session states for stateless protocols; Signalling session states; State transitions; Keeping-state mechanisms

Abstract

Methods of avoiding or minimizing cost of stateful connections between application servers (ASs) and S-CSCF nodes in an IMS network with multiple domains. S-CSCF service logic is provided and connected to a co-located AS. The IMS includes a network operator administration domain and an MVNO service domain, and the S-CSCF logic and AS are maintained in the same domain, e.g., the MVNO or network operator domain.

Claims

1. A method of avoiding or minimizing cost of stateful connections between application servers (ASs) and S-CSCF nodes in an IMS network with multiple domains, said method comprising:

providing S-CSCF service logic; and

connecting said S-CSCF logic to a co-located AS.

2. The method of claim 1 wherein the S-CSCF service logic is provided in a processor complex that also hosts the AS.

3. The method of claim 2 where a processor hosts both the S-CSCF service logic and the AS.

4. The method of claim 1 wherein the IMS network includes a network operator administration domain and an MVNO service domain, and wherein the S-CSCF logic and AS are maintained in the same domain.

5. The method of claim 4 wherein the same domain is the MVNO domain.

6. The method of claim 1 wherein the S-CSCF is provisioned to instantiate multiple call models, each said call model having filter codes to associate IMS service codes with application servers (ASs), said ASs being responsive to service point triggers (SPTs) and each AS having service logic to provide a service for a corresponding IMS service code, and wherein at least two call models have different ASs with different service logic associated with a specified IMS service code, such that the two call models will provide distinct service experience for said specified IMS service code.

7. The method of claim 1 wherein the S-CSCF is provisioned to instantiate dynamic call models, each said call model having filter codes to associate IMS service codes with application servers (ASs), wherein said call model adapts to a dynamic context of a user.

8. The method of claim 6 wherein the call models are instantiated with the facilitation of a call model database that is maintained by an MVNO or VSO and wherein at least one AS is maintained by the same MVNO or VSO.

9. The method of claim 7 wherein the call models are instantiated with the facilitation of a call model database that is maintained by an MVNO or VSO and wherein at least one AS is maintained by the same MVNO or VSO.