Method and system for locating a mobile terminal
First Claim
1. A method of locating a mobile terminal in a cellular network, whereina gateway node receives a service request including an internet protocol multimedia subsystem (IMS) identity of an IMS system, accesses a database storing a first routing information of said mobile terminal based on said IMS identity;
- uses said first routing information to access a subscriber database in order to derive,a second routing information and a cellular identity of said mobile terminal; and
initiates a location service of said cellular network based on said derived second routing information and cellular identity, andall public IMS identities known in said subscriber database are returned to said gateway node so that any further location requests with other identities would not require a subscriber database query as long as a location result exists in said gateway node.
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Accused Products
Abstract
The present invention relates to a method and system for locating a mobile terminal addressed in a location service request by an overlay identity. A database is accessed to obtain a first routing information of the mobile terminal based on the overlay identity, and the first routing information is then used to access a sub-scriber database in order to derive a second routing information and a cellular identity of the mobile terminal, based on which a location service of the cellular network is initiated. Thereby, a LCS clients of the overlay system (e.g. IMS) can be supported in current LCS services to enhance their functionality.
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Citations
18 Claims
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1. A method of locating a mobile terminal in a cellular network, wherein
a gateway node receives a service request including an internet protocol multimedia subsystem (IMS) identity of an IMS system, accesses a database storing a first routing information of said mobile terminal based on said IMS identity; - uses said first routing information to access a subscriber database in order to derive,
a second routing information and a cellular identity of said mobile terminal; and
initiates a location service of said cellular network based on said derived second routing information and cellular identity, andall public IMS identities known in said subscriber database are returned to said gateway node so that any further location requests with other identities would not require a subscriber database query as long as a location result exists in said gateway node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- uses said first routing information to access a subscriber database in order to derive,
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10. A system for locating a mobile terminal in a cellular network, sid system comprising:
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a gateway node for receiving a location request including an internet protocol multimedia subsystem (IMS) identity of said mobile terminal in an IMS system; and a database storing a first routing information of said mobile terminal, and a subscriber database, wherein said gateway node is arranged to access said database based on said IMS identity, to use said first routing information for an access to said subscriber database in order to derive a second routing information and a cellular identity, to initiate a location service of said cellular network based on said derived second routing information and cellular identity, and to receive all public IMS identities known in said subscriber database so that any further location requests with other identities would not require a subscriber database query as long as a location result exists in said gateway node. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A gateway node for initiating a location service for locating a mobile terminal in a cellular network, said gateway node being arranged to read a first routing information from a database based on a received internet protocol multimedia subsystem (IMS) identity of said mobile terminal in an IMS system, to use said first routing information for an access to a subscriber database in order to derive a second routing information and a cellular identity, to perform said initiation based on said derived second routing information and cellular identity, and to receive all public IMS identities known in said subscriber database so that any further location requests with other identities would not require a subscriber database query as long as the location result exists in said gateway node.
Specification