Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-10-02
2007-10-02
Feild, Joseph (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456200, C455S456300, C455S456400, C455S456500, C455S456600, C455S414100, C455S404200
Reexamination Certificate
active
10745632
ABSTRACT:
In one of multiple mobile communication networks, a serving node responsible for locating mobile terminals is responsive to a registration request from a mobile terminal for storing the serving node identity in a home location database to which the mobile terminal is subscribed. In response to a location request message from a client terminal requesting the location of a target mobile terminal, a serving node identity is retrieved from the home location database of the target mobile terminal. The serving node identity represents the current location of the target mobile terminal. If the current location area is within the coverage area of location-based service provided by the client terminal, the location request message is forwarded to a serving node identified by the retrieved serving node identity. Otherwise, an error message is transmitted to the client terminal to indicate that the target mobile terminal is roaming outside of the coverage area.
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Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Functional stage 2 description of location services (3GPP TS 23.271 version 5.3.0 Release 5), ETSI TS 123 271 V5.3.0, Jun. 2002, XP002227478, pp. 1-75.
Ajibade-Akonai Olumide
Feild Joseph
NEC Corporation
Young & Thompson
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