Method and apparatus for handling emergency calls
First Claim
1. A method in an IP Multimedia Subsystem (IMS) network that uses Session Initiation Protocol (SIP) of providing location information to an emergency center in a circuit-switched network for a mobile radio terminal connected to a packet-switched mobile access network, the method comprising the following steps:
- receiving a packet-switched emergency request from the mobile radio terminal containing a calling number via a SIP INVITE message,sending a location query for the calling number to a mobile radio terminal positioning center in a mobile radio access network when more detailed location information is needed,receiving a location indication for the mobile radio terminal in response to the location query,translating the packet-switched emergency request into a circuit-switched control message for the emergency request, andsending the translated circuit-switched control message including the location indication for the mobile radio terminal to the emergency center according to one or more standards for initiating a circuit-switched emergency call.
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Accused Products
Abstract
A method and apparatus for providing location information for subscribers connected to a packet-switched mobile access network in connection with emergency calls made over a multimedia service network. An emergency request is received at the multimedia service network from a subscriber containing the calling number of the subscriber. In response thereto, a media gateway control function in the multimedia service network sends a location query including said calling number to a mobile positioning center in the mobile access network, which then can retrieve location information for the subscriber. After receiving location information from the mobile positioning center, the media gateway control function selects an emergency center and sends a location indication for the subscriber thereto in a circuit-switched control message for initiating an emergency call, according to prevailing standards.
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Citations
18 Claims
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1. A method in an IP Multimedia Subsystem (IMS) network that uses Session Initiation Protocol (SIP) of providing location information to an emergency center in a circuit-switched network for a mobile radio terminal connected to a packet-switched mobile access network, the method comprising the following steps:
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receiving a packet-switched emergency request from the mobile radio terminal containing a calling number via a SIP INVITE message, sending a location query for the calling number to a mobile radio terminal positioning center in a mobile radio access network when more detailed location information is needed, receiving a location indication for the mobile radio terminal in response to the location query, translating the packet-switched emergency request into a circuit-switched control message for the emergency request, and sending the translated circuit-switched control message including the location indication for the mobile radio terminal to the emergency center according to one or more standards for initiating a circuit-switched emergency call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An IP multimedia service network using Session Initiation Protocol (SIP) signaling for providing location information to an emergency center in a circuit-switched network for a mobile radio terminal connected to a packet-switched mobile access network, comprising one or more multimedia service network nodes configured to:
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receive a packet-switched emergency request from the mobile radio terminal containing a calling number via a SIP INVITE message, send a location query for the calling number to a mobile radio terminal positioning center in a mobile radio access network when more detailed location information is needed, receive a location indication for the mobile radio terminal in response to the location query, translate the packet-switched emergency request into a circuit-switched control message for the emergency request, and send the translated circuit-switched control message including the location indication for the mobile radio terminal to the emergency center according to one or more standards for initiating a circuit-switched emergency call. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification