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US 2017/0317681 A1Published application
Time-frequency deviation compensation method, and user terminal
AssigneeHuawei Technologies Co., Ltd.
InventorsJiadi Liu, Xiangchun Wu
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Abstract
Embodiments of the present invention disclose a time-frequency deviation compensation method, and a user terminal. A temperature compensation exception can be identified and a time-frequency deviation caused by the temperature compensation exception can be compensated by implementing the embodiments of the present invention.
Claims15
A time-frequency deviation compensation method for use with a user terminal in a discontinuous reception (DRX) state, the method comprising:
- measuring a temperature of an oscillator on the user terminal, so as to obtain a temperature variation amount of the oscillator from a first time point to a second time point in a DRX cycle, wherein the first time point is a sleep start moment in the DRX cycle, and the second time point is a sleep end moment in the DRX cycle;
- determining a frequency variation amount of the oscillator in the DRX cycle according to the temperature variation amount and a preset mapping relationship between the temperature and a frequency;
- performing first frequency compensation on the user terminal according to the frequency variation amount;
- estimating a time deviation and a frequency deviation between the user terminal and a serving cell of the user terminal when the temperature variation amount exceeds a preset threshold, so as to obtain a time deviation estimated value and a frequency deviation estimated value;
- and
- performing time-frequency compensation on the user terminal according to the time deviation estimated value and the frequency deviation estimated value.
3 more elements
A user terminal, comprising:
- an oscillator configured to provide a frequency signal;
- and
- a processor configured to:
- measure a temperature of the oscillator when the user terminal is in a discontinuous reception (DRX) state, so as to obtain a temperature variation amount of the oscillator from a first time point to a second time point in a DRX cycle, wherein the first time point is a sleep start moment in the DRX cycle, and the second time point is a sleep end moment in the DRX cycle;
- determine a frequency variation amount of the oscillator in the DRX cycle according to the temperature variation amount and a preset mapping relationship between the temperature and a frequency;
- perform first frequency compensation on the user terminal according to the frequency variation amount;
- estimate a time deviation and a frequency deviation between the user terminal and a serving cell of the user terminal when the temperature variation amount exceeds a preset threshold, so as to obtain a time deviation estimated value and a frequency deviation estimated value;
- and
- perform time-frequency compensation on the user terminal according to the time deviation estimated value and the frequency deviation estimated value.
6 more elements
Dependencies are inferred from the claim text.