METHOD FOR THE OBTAINING OF POSITION INFORMATION FOR A USER INITIATING AN EMERGENCY CALL IN A COMMUNICATION SYSTEM

• US 20120244829A1
• Filed: 03/23/2012
• Published: 09/27/2012
• Est. Priority Date: 03/24/2011
• Status: Active Grant

• Current Assignee: Teliasonera AB
• Original Assignee: Teliasonera AB
• Inventors: JARVENPAA, Marko, JALKANEN, Tero
• Granted Patent: US 8,774,751 B2
• Time in Patent Office: Days
• US Class Current: 455/404.1
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04M 3/5116 for emergency applications
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• 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 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

The invention relates to a system and a method. In the method publication of presence information associated with a user is received by a presence server, the presence information comprises a human-readable address for the user. A request for establishing an emergency session from the user is received to a session processing server, which routes the emergency session to a public safety answering point node. In response to receiving the emergency session, the public safety answering point node sends a subscription for at least part of the presence information to the presence server, the at least part of the presence information comprising the human-readable address for the user. The presence server provides in response the at least part of the presence information to the public safety answering point node.

Claims

1. A method, comprising:

receiving, by a presence server, a publication of presence information associated with a user, the presence information comprising a human-readable address for the user;

receiving, by a multimedia session processing server, a request for establishing an emergency session from the user;

routing the emergency session to a public safety answering point node by the multimedia session processing server;

receiving, by the presence server, a subscription carried in a session initiation protocol message for at least part of the presence information from the public safety answering point node, the at least part of the presence information comprising the human-readable address for the user;

determining the public safety answering point node as a source of the subscription;

authorizing the subscription in response to the determination; and

providing, by the presence server, the at least part of the presence information to the public safety answering point node.

2. The method according to claim 1, the method further comprising:

authenticating the public safety answering point node.

3. The method according to claim 1, the method further comprising:

routing the subscription from the public safety answering point node to an inquiring call session control function in a public land mobile network serving the user;

routing the subscription from the inquiring call session control function to a serving call session control function serving the user; and

routing the subscription from the serving call session control function to a presence server.

4. The method according to claim 3, the method further comprising:

determining an identity of the public land mobile network serving the user based on session establishment signaling received to the public safety answering point; and

using the identity of the public land mobile network in routing the subscription from the public safety answering point node to the inquiring call session control function.

5. The method according to claim 1, the method further comprising:

performing an emergency registration to a home subscriber server in the public land mobile network serving the user.

6. The method according to claim 1, the method comprising:

receiving the human-readable address from the user to a presence user agent serving the user.

7. The method according to claim 6, the method further comprising:

obtaining street and city name information to a presence user agent serving the user from a server; and

using the street and city name information to verify correctness of the human-readable address.

8. The method according to claim 1, wherein the public safety answering point node is communicatively connected to the public switched telephone network.

9. The method according to claim 1, wherein the public safety answering point node is communicatively connected to an internet protocol multimedia subsystem of the public land mobile network serving the user.

10. A communication system, comprising:

a multimedia session processing server configured to receive a request for establishing an emergency session from the user, to route the emergency session to a public safety answering point node; and

a presence server configured to receive a publication of presence information associated with a user, the presence information comprising a human-readable address for the user, to receive a subscription carried in a session initiation protocol message for at least part of the presence information from the public safety answering point node, the at least part of the presence information comprising the human-readable address for the user, to determine the public safety answering point node as a source of the subscription, to authorize the subscription in response to the determination, and to provide the at least part of the presence information to the public safety answering point node.

11. A presence server, comprising:

at least one processor configured to receive a publication of presence information associated with a user, the presence information comprising a human-readable address for the user, to receive a subscription carried in a session initiation protocol message for at least part of the presence information from the public safety answering point node, the at least part of the presence information comprising the human-readable address for the user, to determine the public safety answering point node as a source of the subscription, to authorize the subscription in response to the determination, and to provide the at least part of the presence information to the public safety answering point node.

12. A computer program stored on a computer readable medium comprising code adapted to cause the following when executed on a data-processing system:

receiving, by a presence server, a publication of presence information associated with a user, the presence information comprising a human-readable address for the user;

receiving, by the presence server, a subscription carried in a session initiation protocol message for at least part of the presence information from the public safety answering point node, the at least part of the presence information comprising the human-readable address for the user;

determining the public safety answering point node as a source of the subscription;

authorizing the subscription in response to the determination; and

providing, by the presence server, the at least part of the presence information to the public safety answering point node.