Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2008-05-23
2010-06-29
Edouard, Patrick N. (Department: 2617)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S445000, C455S432100, C455S434000, C455S435100, C455S435200, C455S435300, C455S422100
Reexamination Certificate
active
07747266
ABSTRACT:
In one illustrative method, a periodic location update timer value is broadcasted by a wireless communication network and received and stored in memory of a mobile station. A request for data service is transmitted by the mobile station to a wireless communication network, and the request is reattempted at least one time in response to identifying a rejection of the request. If the request for the data service is accepted in response to the request, the mobile station operates in the wireless communication network using the data service. On the other hand, if the request for the data service is not accepted, the mobile station is set in a data service deregistered state. A timer is initialized with an initial value that is less than the periodic location update timer value and started. In response to an expiration of the timer, the mobile station repeats the transmission of the request for the data service and any reattempts in response to any rejections of the request. If the periodic location update timer value is less than the initial value, however, the timer is initialized with the periodic location update timer value.
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Gunaratnam Jayasri
Hind Hugh
Naqvi Noushad
Nguyen Bao Quoc
Phipps Darcy Richard
Edouard Patrick N.
Heiber Shantell
Oskorep, Esq. John J.
Research In Motion Limited
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