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