Method for regularly tracking adjacent cell, and user equipment (UE)

Abstract

Embodiments of the invention disclose a method for regularly tracking an adjacent cell, and user equipment (UE). The method comprises the steps that the UE acquires position offset of a strongest signal transmission path of a service cell, wherein the UE resides in the service cell at present; and the UE adjusts the position of a search window used in regular tracking of the adjacent cell according to the position offset of the strongest signal transmission path of the service cell, so that the search window used in regular tracking of the adjacent cell covers the position of the strongest signal transmission path of the adjacent cell. While hardware resources are not increased, the performance of regular tracking of the adjacent cell can be improved, and the power consumption of regular tracking of the adjacent cell can be reduced.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of mobile communication, and in particular to a method for timing tracking of neighboring cells and a UE. Background technique [0002] The downlink signal transmitted by the NodeB is transmitted to the user equipment (UE) through different paths. The path with the strongest signal transmission is called the "strongest path". The UE realizes cell timing tracking by finding the strongest path. However, due to the change of the wireless channel and the movement of the UE, the position of the strongest path swings left and right, that is, the path drifts. [0003] In order to realize the timing tracking of the cell, in the prior art, the UE generally uses 3 search windows to track the timing of the serving cell, assuming that the search width of a search window is 64 chips (chip), that is, it can cover the path drift of 192 chips , using one search window to track the timing of the ne...

AI Technical Summary

Problems solved by technology

[0004] When the UE is in standby, in order to save power consumption, the UE will use the 32K clock as the timing clock. The accuracy of the 32K clock itself is not high. The introduction of the 32K clock timing brings a large timing deviation, which directly leads to the degradation of the timing tracking performance of the cell.

Especially for neighboring cells, their timing tracking performance is relatively poor, which will further deteriorate the timing tracking performance of neighboring cells

In addition, coupled with the fading of the wireless channel, the movement of the UE may eventually lead to the failure of timing tracking of neighboring cells

Neighboring cell timing tracking failure will lead to poor communication quality or high load in the serving cell, the UE cannot reselect to the neighboring cell and cause call drop, which will seriously affect the user's subjective experience

[0005] A current method to improve the timing tracking performance of neighboring cells is to increase the baseband processing unit, such as increasing the number of search windows of neighboring cells, but this will increase the direct consumption of hardware resources and increase the number of adjacent cells. Timing tracking power consumption

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