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US 2011/0217935 A1Published application
Method and Terminal for Acquiring Frequency Difference
AssigneeHuawei Device Co., Ltd.
InventorJianhai Shen
Life of this patent
Estimating the term…
Abstract
A method and a terminal for acquiring a frequency difference are disclosed. The method includes acquiring a difference T1 between clock timing before dormancy and clock timing of a base station, recording a dormancy period T between dormancy start and dormancy end, acquiring a difference T2 between clock timing after dormancy and clock timing of the base station, and computing a frequency difference between a low speed clock and a base station clock according to normalization frequencies, T1, T, and T2.
Claims15
A method for acquiring a frequency difference, the method comprising:
- acquiring a difference T1 between clock timing before dormancy and clock timing of a base station;
- recording a dormancy period T between dormancy start and dormancy end;
- acquiring a difference T2 between clock timing after dormancy and clock timing of the base station;
- and
- computing a frequency difference between a low speed clock and a base station clock according to normalization frequencies, T1, T, and T2.
2 more elements
A terminal, comprising:
- a first acquiring module, configured to, before dormancy, receive cell frame timing transmitted by a base station, and to perform a subtract operation using the cell frame timing transmitted by the base station and frame timing maintained before dormancy to obtain a difference T1 between clock timing before dormancy and clock timing of the base station;
- a recording module, configured to record a dormancy period T between dormancy start and dormancy end;
- a second acquiring module, configured to, after dormancy, search for cell frame timing transmitted by the base station, to replace cell frame timing maintained in dormancy state with the searched out cell frame timing, and to perform a subtraction operation using the cell frame timing after replacement and cell frame timing maintained after dormancy to obtain a difference T2 between clock timing after dormancy and clock timing of the base station;
- and
- a computing module, configured to compute a frequency difference between a low speed clock and a base station clock according to normalization frequencies, T1, T, and T2.
2 more elements
Dependencies are inferred from the claim text.