VOIP emergency call support

• US 9,788,181 B2
• Filed: 09/10/2014
• Issued: 10/10/2017
• Est. Priority Date: 08/02/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Edge, Stephen William, Burroughs, Kirk Allan, Nasielski, John Wallace
• Primary Examiner(s): KASSIM, KHALED M
• Application Number:
  US14/482,991
• Publication Number:
  US 20140376414A1
• Time in Patent Office: 1,126 Days
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/401 wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 1/72418 for supporting emergency services
• 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 2242/14 with services dependent on location where the service is an information service H04M2242/15; services independent of location H04M3/42229
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/436 Arrangements for screening incoming calls , i.e. evaluating the characteristics of a call before deciding whether to answer it based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; diversion H04M3/54
• CPC Class Codes: H04M 3/5116 for emergency applications
• 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
• CPC Class Codes: H04W 8/205 Transfer to or from user equipment or user record carrier
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

Techniques to support emergency voice-over-Internet Protocol (VoIP) calls are described. The techniques may be used for various 3GPP and 3GPP2 networks, various location architectures, and various types of User Equipment (UE). A UE communicates with a visited network to send a request to establish an emergency VoIP call. The UE interacts with a location server instructed by the visited network to obtain a first position estimate for the UE. The UE performs call setup via the visited network to establish the emergency VoIP call with a PSAP, which may be selected based on the first position estimate. The UE may thereafter perform positioning with the location server to obtain an updated position estimate for the UE, e.g., if requested by the PSAP.

Claims

1. A method for establishing a packet-based emergency call by a user equipment (UE), comprising:

performing network attach with a radio access network (RAN) for packet-based access, wherein performing the network attach comprises transmitting a message comprising a first emergency services indication;

performing a registration with a home network in order to perform an emergency call, wherein performing the registration comprises transmitting a session initiation protocol (SIP) REGISTER to a Proxy Call Session Control Function (P-CSCF) in a serving network, wherein the SIP REGISTER comprises a second emergency services indication and a UE identifier; and

after receiving an indication that the registration is successful, establishing a packet-based call, using the packet-based access, to perform the emergency call, wherein establishing the packet-based call comprises transmitting a SIP INVITE to the P-CSCF in the serving network, wherein the SIP INVITE comprises a third emergency services indication and location information of the UE, and wherein the SIP INVITE is forwarded to an Emergency CSCF (E-CSCF) in the serving network.

2. The method of claim 1, wherein the SIP REGISTER is forwarded to a Serving CSCF (S-CSCF) in the home network.

3. The method of claim 1, wherein performing the network attach comprises performing a General Packet Radio Service (GPRS) attach.

4. The method of claim 1, wherein the packet-based call is established without authentication of the UE.

5. A user equipment (UE) for establishing a packet-based emergency call, comprising:

at least one processor configured to;

perform network attach with a radio access network (RAN) for packet-based access, wherein performing the network attach comprises transmitting, via a transceiver, a message comprising a first emergency services indication;

perform a registration with a home network in order to perform an emergency call, wherein performing the registration comprises transmitting, via the transceiver, a session initiation protocol (SIP) REGISTER to a Proxy Call Session Control Function (P-CSCF) in a serving network, wherein the SIP REGISTER comprises a second emergency services indication and a UE identifier; and

after receiving, via the transceiver, an indication that the registration is successful, establish, via the transceiver, a packet-based call, using the packet-based access, to perform the emergency call, wherein establishing the packet-based call comprises transmitting, via the transceiver, a SIP INVITE to the P-CSCF in the serving network, wherein the SIP INVITE comprises a third emergency services indication and location information of the UE, and wherein the SIP INVITE is forwarded to an Emergency CSCF (E-CSCF) in the serving network; and

a memory coupled with the at least one processor.

6. The UE of claim 5, wherein the SIP REGISTER is forwarded to a Serving CSCF (S-CSCF) in the home network.

7. The UE of claim 5, wherein the at least one processor is configured to perform the network attach by performing a General Packet Radio Service (GPRS) attach.

8. The UE of claim 5, wherein the at least one processor establishes, via the transceiver, the packet-based call without authentication of the UE.

9. A user equipment (UE) for establishing a packet-based emergency call, comprising:

means for performing network attach with a radio access network (RAN) for packet-based access, wherein the means for performing the network attach comprises means for transmitting a message comprising a first emergency services indication;

means for performing a registration with a home network in order to perform an emergency call, wherein the means for performing the registration comprises means for transmitting a session initiation protocol (SIP) REGISTER to a Proxy Call Session Control Function (P-CSCF) in a serving network, wherein the SIP REGISTER comprises a second emergency services indication and a UE identifier; and

means for establishing, after receiving an indication that the registration is successful, a packet-based call, using the packet-based access, to perform the emergency call, wherein the means for establishing the packet-based call comprises means for transmitting a SIP INVITE to the P-CSCF in the serving network, wherein the SIP INVITE comprises a third emergency services indication and location information of the UE, and wherein the SIP INVITE is forwarded to an Emergency CSCF (E-CSCF) in the serving network.

10. The UE of claim 9, wherein the SIP REGISTER is forwarded to a Serving CSCF (S-CSCF) in the home network.

11. The UE of claim 9, wherein the means for performing the network attach comprises means for performing a General Packet Radio Service (GPRS) attach.

12. The UE of claim 9, wherein the means for establishing the packet-based call comprises means for establishing the packet-based call without authentication of the UE.

13. A non-transient, computer-readable medium, having instructions, stored thereon, for establishing a wireless, packet-based emergency call by a user equipment (UE), comprising instructions to:

perform network attach with a radio access network (RAN) for packet-based access, wherein performing the network attach comprises transmitting a message comprising a first emergency services indication;

perform a registration with a home network in order to perform an emergency call, wherein performing the registration comprises transmitting a session initiation protocol (SIP) REGISTER to a Proxy Call Session Control Function (P-CSCF) in a serving network, wherein the SIP REGISTER comprises a second emergency services indication and a UE identifier; and

after receiving an indication that the registration is successful, establish a packet-based call, using the packet-based access, to perform the emergency call, wherein establishing the packet-based call comprises transmitting a SIP INVITE to the P-CSCF in the serving network, wherein the SIP INVITE comprises a third emergency services indication and location information of the UE, and wherein the SIP INVITE is forwarded to an Emergency CSCF (E-CSCF) in the serving network.

14. The computer-readable medium of claim 13, wherein the SIP REGISTER is forwarded to a Serving CSCF (S-CSCF) in the home network.

15. The computer-readable medium of claim 13, wherein the instructions to perform the network attach comprise instructions to perform a General Packet Radio Service (GPRS) attach.

16. The computer-readable medium of claim 13, wherein the instructions to establish the packet-based call comprise instructions for establishing the packet-based call without authentication of the UE.