Cell reselection method and mobile terminal during high-speed mobility

Abstract

The invention discloses a cell reselection method and a mobile terminal in the process of high-speed movement, belonging to the technical field of mobile communication. The method is suitable for a mobile terminal in the process of high-speed movement, and specifically includes: selecting a service cell that meets the conditions of residence and relocating to the cell. stay; measure neighboring cells and maintain a list of target cells; perform cell reselection according to the list of target cells when cell reselection is required, judge whether cell reselection is successful, and retry a limited number of failed cells . The technical solution above aims to reduce search loss, improve reselection efficiency, and reduce network loss time by performing a limited number of repeated attempts to replace the traditional full-band search process for cell selection on cells that fail reselection.

Description

Technical field [0001] The present invention relates to the field of mobile communication technology, and in particular to a cell reselection method and mobile terminal during high-speed movement. Background technique [0002] The mobile terminal in the existing mobile communication system usually encounters the problem of cell reselection during communication. The so-called cell reselection is judged based on the measurement report of the terminal. When the terminal finds that the signal strength of the current serving cell cannot meet the user's communication needs after measurement, or there is a neighboring cell with better signal strength that can meet the user's communication needs, it will start the cell reselection process and change a better selection The neighboring cell is selected as the current serving cell and stays there to ensure the user's communication quality. [0003] In the prior art, in the standby mode, the mobile terminal periodically measures the cell to ...

AI Technical Summary

Problems solved by technology

[0004] When the mobile terminal is in a high-speed moving process (for example, when the user uses the mobile terminal on the high-speed rail), the Doppler frequency shift effect is obvious due to the fast moving speed, the loss of the train body is large, and the scene along the way is relatively complicated. It may cause cell reselection and failure of a certain link in the cell selection process, so the mobile terminal in high-speed movement will lose the network in a short period of time, and the user experience is poor

In the existing cell reselection process, after the reselection fails, it directly jumps to the next cell to search, which takes a long time to search, and the search efficiency is low, which increases the time for users to lose the network

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