Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2011-04-05
2011-04-05
Tran, Congvan (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S435100, C455S433000, C370S252000
Reexamination Certificate
active
07920862
ABSTRACT:
Methods and systems for IMEI registration are provided. In accordance with exemplary embodiments of the present invention, when an IMEI registration fails due to a network failure, the mobile station implements a back-off algorithm for future IMEI registration attempts. Specifically, the present invention provides a back-off algorithm which determines a different amount of time for the time period between each unsuccessful IMEI registration.
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Barrow Steven Wesley
Sharma Manish
Soong Anthony Wei-Hsia
Nextel Communications Inc.
Tran Congvan
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