Method and apparatus of performing frequency transitions in...

Details Method and apparatus of performing frequency transitions in... Method and apparatus of performing frequency transitions in...

2011-07-05

2011-07-05

Taylor, Barry W (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S423000, C455S067110, C455S067140

Reexamination Certificate

active

07974617

ABSTRACT:
A method and apparatus adapted to permit an internal handover from 1900 MHz to 900 MHz under controlled circumstances. Using the method of the present invention, the amount of time needed to disconnect a call of a user equipment (UE) under test, remove the 1800 MHz cell and setup a GSM 1900 MHz cell, allow the UE to perform a search for the 1900 MHz cell, register and establish a new call and then perform tests on GSM 1900 MHz is reduced by several seconds. On a production line in which millions of UEs are manufactured, the time saved by the present invention allows for significant savings in production costs.

REFERENCES:
patent: 7561878 (2009-07-01), Tam et al.
patent: 2005/0232141 (2005-10-01), Meier et al.
patent: 2006/0056342 (2006-03-01), Lee
patent: 2352586 (2001-01-01), None

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