Method and System for Providing an Emergency Location Service
First Claim
1. A method for providing an emergency location service using an IP multimedia subsystem (IMS) core, the method comprising the steps of:
- receiving an emergency call initiating request message from a user equipment;
transmitting a location service request message requesting for retrieving a location of the user equipment to a location retrieval subsystem in response to the emergency call initiating request message;
receiving a location service response message including current location information of the user equipment, which is acquired through an access to the user equipment by the location retrieval subsystem having received the location service request message, from the location retrieval subsystem; and
selecting an emergency center on the basis of the current location information and transmitting the emergency call initiating request message including the current location information to the selected emergency center.
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Accused Products
Abstract
Provided are a method and a system for providing an emergency location service using an IMS core. In the method, when the IMS core receives an emergency call initiating request message from a user equipment, the IMS core transmits a location service request message requesting for retrieving a location of the user equipment to a location retrieval subsystem in response to the emergency call initiating request message. Then, when the IMS core receives current location information of the user equipment, which is acquired through an access to the user equipment by the location retrieval subsystem having received the location service request message, from the location retrieval subsystem, the IMS core selects an emergency center on the basis of the current location information and transmits the emergency call initiating request message including the current location information to the selected emergency center. Then, an emergency call is established between the user equipment and the emergency center.
57 Citations
37 Claims
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1. A method for providing an emergency location service using an IP multimedia subsystem (IMS) core, the method comprising the steps of:
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receiving an emergency call initiating request message from a user equipment; transmitting a location service request message requesting for retrieving a location of the user equipment to a location retrieval subsystem in response to the emergency call initiating request message; receiving a location service response message including current location information of the user equipment, which is acquired through an access to the user equipment by the location retrieval subsystem having received the location service request message, from the location retrieval subsystem; and selecting an emergency center on the basis of the current location information and transmitting the emergency call initiating request message including the current location information to the selected emergency center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for providing an emergency location service, comprising the steps of:
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transmitting an emergency call initiating request message from a user equipment to an IP multimedia subsystem (IMS) core; transmitting a first location service request message requesting for retrieving a location of the user equipment from the IMS core to a location retrieval subsystem; acquiring, by the location retrieval subsystem which accesses the user equipment, current location information of the user equipment in response to the first location service request message; transmitting a first location service response message including the current location information from the location retrieval subsystem to the IMS core; transmitting the emergency call initiating request message including the current location information from the IMS core to a emergency center which is selected by the IMS core on the basis of the received current location information; and establishing an emergency call between the emergency center and the user equipment in response to the received emergency call initiating request message. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for providing an emergency location service, the method comprising the steps of:
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transmitting an emergency call initiating request message including its own initial location information from a user equipment to an IP multimedia subsystem (IMS) core; determining, by the IMS core, whether the initial location information included in the emergency call initiating request message is sufficient for determining an emergency center; transmitting the emergency call initiating request message from the IMS core to a emergency center which is selected by IMS core on the basis of the initial location information, in case it is determined that the initial location information is sufficient for determining the emergency center; and establishing an emergency call between the emergency center having received the emergency call initiating request message and the user equipment. - View Dependent Claims (29, 30)
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31. A method for providing an emergency location service using a user equipment, the method comprising the steps of:
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transmitting a session connection request message including emergency indicator information to a core network; accessing a location retrieval subsystem for acquiring current location information of the user equipment by measuring the current location of the user equipment in response to a request from the core network; and establishing an emergency call in response to a session connection request from an emergency center which is selected by the core network on the basis of the current location information acquired by the location retrieval subsystem. - View Dependent Claims (32, 34)
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33. The method according to claim 33, wherein the core network is an IMS core.
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35. A user equipment supporting an emergency location service, the user equipment comprising:
a processor which transmits a session connectivity request message including emergency indicator information to a core network, which accesses a location retrieval subsystem for acquiring current location information of the user equipment by measuring current location of the user equipment in response to a request from the core network, and which performs a session connection to an emergency center in response to a session connection request from the emergency center which is selected by the core network on the basis of the current location information acquired by the location retrieval subsystem. - View Dependent Claims (36, 37)
Specification