Method and apparatus for location area updating in cellular...

Details Method and apparatus for location area updating in cellular... Method and apparatus for location area updating in cellular...

2007-02-20

2007-02-20

Tsang, Fan (Department: 2614)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S436000, C455S456100

Reexamination Certificate

active

09933133

ABSTRACT:
A radio access network provides information to a mobile radio terminal indicating a list of one or more geographic coverage areas from which the mobile radio terminal may or may not obtain service. In the preferred example embodiment, a “forbidden” list includes one or more geographic coverage areas from which the mobile radio terminal may not obtain service. The mobile checks the received information when considering whether to request service from a new geographic coverage area, and determines whether to select the geographic coverage area depending on that received information. Moreover, the mobile terminal consults that list to determine whether to perform a location area update procedure. In other words, if the list indicates that a new geographic coverage area should not be selected, the mobile terminal does not perform a location area update request in that new coverage area.

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