Methods, systems, and computer readable media for caching call session control function (CSCF) data at a diameter signaling router (DSR)

• US 9,148,524 B2
• Filed: 05/07/2012
• Issued: 09/29/2015
• Est. Priority Date: 05/06/2011
• Status: Active Grant

• Current Assignee: Tekelec
• Original Assignee: Tekelec
• Inventors: Deo, Ajay Padmakar
• Primary Examiner(s): SISON, JUNE Y
• Application Number:
  US13/465,552
• Publication Number:
  US 20120311064A1
• Time in Patent Office: 1,240 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/1403 Architecture for metering, charging or billing
• CPC Class Codes: H04L 12/1407 Policy-and-charging control [PCC] architecture
• CPC Class Codes: H04M 15/66 Policy and charging system
• CPC Class Codes: H04M 15/8044 Least cost routing
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 8/12 between location registers or mobility servers
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

According to one aspect, the subject matter described herein includes a method for caching call session control function (CSCF) data at a Diameter signaling router (DSR). The method includes steps occurring at a DSR network node comprising a communication interface, a processor, and a memory. The steps include receiving, via the communication interface, a Diameter message associated with a network subscriber. The steps also include identifying, by the processor, a CSCF associated with the network subscriber based on the Diameter message. The steps further include storing, in the memory, a record associating the CSCF and the network subscriber.

Claims

1. A method for caching call session control function (CSCF) data at a Diameter signaling router (DSR), the method comprising:

at a DSR network node comprising a communication interface, a processor, and a memory;

receiving, via the communication interface, a Diameter message associated with a network subscriber;

identifying, by the processor, a CSCF associated with the network subscriber based on the Diameter message;

storing, in the memory, a record associating the CSCF and the network subscriber;

receiving, via the communication interface, a session initiation protocol (SIP) invite message associated with the network subscriber; and

routing, by the processor, the SIP invite message to the CSCF based on the record.

2. The method of claim 1 further comprising:

receiving, via the communication interface and from a requesting node, a Diameter request message associated with the network subscriber;

generating, by the processor, a Diameter answer message based on the stored record; and

communicating, via the communication interface and to the requesting node, the Diameter answer message.

3. The method of claim 2 wherein the Diameter answer message includes information that identifies the CSCF.

4. The method of claim 2 wherein the Diameter request message comprises at least one of a location information request (LIR), a user authorization request (UAR), a multimedia authorization request (MAR), and a server assignment request (SAR).

5. The method of claim 2 wherein the requesting node comprises at least one of a proxy CSCF, an interrogating CSCF, and a subscriber location function (SLF).

6. The method of claim 1 wherein the Diameter message comprises at least one of a location information request (LIR), a user authorization request (UAR), a multimedia authorization request (MAR), and a server assignment request (SAR).

7. The method of claim 1 wherein the DSR network node includes at least one of a Diameter routing agent, a Diameter proxy agent, and a Diameter translation agent.

8. A system for caching call session control function (CSCF) data at a Diameter signaling router (DSR), the system comprising:

a DSR network node comprising;

a communication interface;

and

wherein the memory includes executable instructions that when executed by the processor control a DSR network module, stored in memory, to perform steps comprising;

receiving, via the communication interface, a Diameter message associated with a network subscriber;

identifying a CSCF associated with the network subscriber based on the Diameter message;

storing, in the memory, a record associating the CSCF and the network subscriber;

receiving, via the communication interface, a session initiation protocol (SIP) invite message associated with the network subscriber; and

routing the SIP invite message to the CSCF based on the record.

9. The system of claim 8 wherein the memory includes executable instructions that when executed by the processor control the DSR network module to perform steps comprising:

receiving, via the communication interface and from a requesting node, a Diameter request message associated with the network subscriber;

generating a Diameter answer message based on the stored record; and

communicating, via the communication interface and to the requesting node, the Diameter answer message.

10. The system of claim 9 wherein the Diameter answer message includes information that identifies the CSCF.

11. The system of claim 9 wherein the Diameter request message comprises at least one of a location information request (LIR), a user authorization request (UAR), a multimedia authorization request (MAR), and a server assignment request (SAR).

12. The system of claim 9 wherein the requesting node comprises at least one of a proxy CSCF, an interrogating CSCF, and a subscriber location function (SLF).

13. The system of claim 8 wherein the Diameter message comprises at least one of a location information request (LIR), a user authorization request (UAR), a multimedia authorization request (MAR), and a server assignment request (SAR).

14. The system of claim 8 wherein the DSR network node includes at least one of a Diameter routing agent, a Diameter proxy agent, and a Diameter translation agent.

15. A non-transitory computer readable medium comprising executable instructions that when executed by a processor of a computer control the computer to perform steps comprising:

at a DSR network node comprising a communication interface, a processor, and a memory;

receiving, via the communication interface, a Diameter message associated with a network subscriber;

identifying, by the processor, a CSCF associated with the network subscriber based on the Diameter message;

storing, in the memory, a record associating the CSCF and the network subscriber;

receiving, via the communication interface, a session initiation protocol (SIP) invite message associated with the network subscriber; and

routing, by the processor, the SIP invite message to the CSCF based on the record.