Mediatek Corporation

Jun Hu

Yuan Yuan

Peng Yang

Jianwei Zhang

Cheng-Yu Tsai

Kuan-Lin Chen

Zhi Zheng

Nien-En Wu

Yen-Chen Chen

Apparatus and methods are provided for determining AR filter coefficient and numbers of synchronization. In one novel aspect, the AR filter coefficient and times of synchronization are determined based on the temperatures of the oscillator. In one embodiment, the UE determines a temperature drift rate by collecting sets of temperatures before and after the UE in the sleep mode of the CDRX, generates one or more threshold look-up tables and performs an optimization selection based on the temperature drift rate and the one or more threshold of look-up tables, wherein the optimization selection comprising selecting an alpha coefficient and a number of subframes for synchronization. In another embodiment, the optimization selection is further determined based on a subcarrier spacing, and a channel type of being a static channel type and a fading channel type. The UE further performs an on-the-fly oscillator S-curve calibration based on the set of temperatures.

Methods and apparatus for determining ar filter coefficient and times of synchronization

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Beijing, China

Jun Hu