Method and system for callback in case of an emergency session

• US 20030108175A1
• Filed: 12/07/2001
• Published: 06/12/2003
• Est. Priority Date: 12/07/2001
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Hurtta, Tuija, Poikselka, Miikka
• Granted Patent: US 7,145,997 B2
• Time in Patent Office: Days
• US Class Current: 379/210.01
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 3/42195 Arrangements for calling back a calling subscriber when the wanted subscriber ceases to be busy H04M3/48
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

The invention relates to a method and system for enabling a callback from an entity to an equipment initiating a session wherein nodes involved in handling the session, are adapted to store information for the session, preferably for a predetermined time from the beginning of the session. The information includes an address of at least one other node in the signalling path, and may also include an identity of the equipment. The at least one other node will be used, in case of callback, to carry signalling related to callback from the entity to the equipment. Preferably, signalling bearer for establishing the session is maintained for a certain time from the beginning of the signalling bearer activation. The nodes preferably are IMS nodes and include P-CSCF, S-CSCF, or MGCF node.

Claims

1. A method for enabling a callback from an entity to an equipment initiating a session, wherein the entity and/or nodes involved in handling the session, store information for the session, the information including an address of at least one other node in the signalling path, the at least one other node in case of callback being used to carry signalling related to callback from the entity to the equipment.

2. The method of claim 1, wherein the entity is an emergency center.

3. The method of claim 1, wherein the session is an emergency session.

4. The method of claim 1, wherein the information for the session is stored for a predetermined time after the session initiation.

5. The method of claim 1, wherein the information includes the identity of the equipment.

6. Method according to claim 1, wherein the information is received when receiving a message from the equipment or another node for initiating the session.

7. Method according to claim 6, wherein the message is a SIP message.

8. Method according to claim 1, wherein signalling bearer for establishing the session is maintained for a predetermined time from the beginning of the signalling bearer activation.

9. Method according to claim 1, wherein the nodes are IMS nodes and include P-CSCF, S-CSCF, or MGCF node.

10. Method according to claim 4 or 8, wherein the nodes include a timer for measuring the predetermined time.

11. Method according to claim 1, wherein, if the session is released before normal completion thereof, the entity starts a callback procedure.

12. The method of claim 1, wherein the entity is in CS domain.

13. The method of claims 5 and 12, wherein the equipment identity is carried in the Calling Line Identity parameter of the ISUP message to a Signalling Gateway.

14. System for enabling a callback from an entity to an equipment adapted to initiate a session, wherein the entity and/or nodes involved in handling the session, are implemented to store information for the session, the information including an address of at least one other node in the signalling path, the at least one other node in case of callback being adapted to carry signalling related to callback from the entity to the equipment.

15. The system of claim 14, wherein the entity is an emergency center.

16. The system of claim 14, wherein the session is an emergency session.

17. The system of claim 14, comprising a memeory for storing the information for the session for a predetermined time after the session initiation.

18. The system of claim 14, wherein the information includes the identity of the equipment.

19. System according to claim 14, wherein the nodes are adapted to store the information when receiving a message from the equipment or another node for initiating the session.

20. System according to claim 19, wherein the message is a SIP message.

21. System according to claim 14, wherein the nodes are adapted to maintain signalling bearer for establishing the session for a predetermined time from the beginning of the signalling bearer activation.

22. System according to claim 14, wherein the nodes are IMS nodes and include P-CSCF, S-CSCF, or MGCF node.

23. System according to claim 21, wherein the nodes include a timer for measuring the predetermined time.

24. System according to claim 14, wherein the entity is adapted to start a callback procedure, if the session is released before normal completion thereof.

25. System of claim 14, wherein the entity is in CS domain.

26. System according to claims 18, wherein the equipment identity is carried in the Calling Line Identity parameter of the ISUP message to a Signalling Gateway.