IDENTIFYING PUBLIC SAFETY ANSWERING POINT (PSAP) CALLBACKS IN INTERNET PROTOCOL (IP) MULTIMEDIA SUBSYSTEM (IMS) EMERGENCY SERVICES
First Claim
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1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
- transmitting, by the WTRU in a first network, a registration message to a service call session control function (S-CSCF) in a second network;
receiving, by the WTRU, a registration response including an information element (IE) including a public safety answering point (PSAP) callback identifier, wherein the IE is stored by the WTRU;
transmitting, by the WTRU, an emergency call to the PSAP in the second network, wherein the emergency call includes the PSAP callback identifier; and
receiving, by the WTRU, a callback from the PSAP, wherein the PSAP callback includes the PSAP callback identifier.
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Abstract
A method and apparatus for identifying public safety answering point (PSAP) callbacks by transmitting, by a wireless transmit/receive unit (WTRU) in a first network, a registration message, to a PSAP in a second network. Upon registration, the WTRU receives a registration response including an information element (IE) and stores the IE. The PSAP, which may be located in either an internet protocol (IP) Network or a public switched telephone network (PSTN), transmits an emergency callback to the WTRU and includes the IE.
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Citations
16 Claims
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1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
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transmitting, by the WTRU in a first network, a registration message to a service call session control function (S-CSCF) in a second network; receiving, by the WTRU, a registration response including an information element (IE) including a public safety answering point (PSAP) callback identifier, wherein the IE is stored by the WTRU; transmitting, by the WTRU, an emergency call to the PSAP in the second network, wherein the emergency call includes the PSAP callback identifier; and receiving, by the WTRU, a callback from the PSAP, wherein the PSAP callback includes the PSAP callback identifier. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless transmit/receive unit (WTRU) comprising:
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a transmitter configured to transmit a registration message to a service call session control function (S-CSCF) in a second network; and a receiver configured to receive a registration response including an information element (IE) including a public safety answering point (PSAP) callback identifier, wherein the IE is stored by the WTRU; and wherein the transmitter is further configured to transmit an emergency call to the PSAP in the second network, wherein the emergency call includes the PSAP callback identifier; wherein the receiver is further configured to receive a callback from the PSAP, wherein the callback includes the PSAP callback identifier; wherein the WTRU is located in a first network. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A public safety answering point (PSAP) comprising:
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a processor configured to generate an information element (IE) including a PSAP callback identifier; a receiver configured to receive an emergency call from a wireless transmit/receive unit (WTRU) in a first network, wherein the emergency call includes the PSAP callback identifier; and a transmitter configured to transmit a callback, wherein the callback includes the PSAP callback identifier; wherein the PSAP is located in a second network.
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14. A proxy call session control function (P-CSCF) comprising:
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a receiver configured to receive a registration message from a wireless transmit/receive unit (WTRU) in a first network; a transmitter configured to transmit the registration message to a service call session control function (S-CSCF) in a second network; the receiver further configured to receive a registration response including an information element (IE) including a public safety answering point (PSAP) callback identifier, wherein the IE is stored by the P-CSCF; and wherein the receiver is further configured to receive an emergency call from the WTRU in the first network, wherein the emergency call includes the PSAP callback identifier, and receive a callback from the PSAP, wherein the callback includes the PSAP callback identifier; wherein the transmitter is further configured to transmit the emergency call to the PSAP in the second network, and transmit the callback to the WTRU; wherein the P-CSCF is located in the first network. - View Dependent Claims (15, 16)
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Specification