A cell reselection method after cell access failure

Abstract

A method for selecting a cell again after a cell access being failed is provided. A method for selecting a cell again after a user terminal being failed to access the cell, comprises following steps: (a) the user terminal recording information of a service cell which is failed to access when the user terminal accessing the cell; (b) deleting all recorded accessing failed service cells when the user terminal constructs a service cell re-selection mearsure list, and triggerring cell re-selection mearsure; (c) the user terminal evaluating the service cells of re-selection mearsure results, orderly selecting one from the service cells which satisfy a cell re-selection evaluation rule, judging whether the selected service cell satisfies a cell stay condition, if there is a service cell satisfying the cell stay condition, executing next step; (d) staying the service cell and starting service cell accessing again, thereafter finishing the re-selection. The method of the invention can access the service cell more effectively and conveniently, thereby avoiding service delay and reducing call-loss.

Description

technical field [0001] The invention relates to a third generation mobile terminal, in particular to a method for the mobile terminal to perform cell reselection after cell access failure. Background technique [0002] A public land mobile network (PLMN for short) is a network established to provide land mobile communication services. In order to receive services provided by the network after being powered on, a user terminal (User Equipment, hereinafter referred to as UE) needs to select a cell in a designated network to camp on, and monitor system information and paging messages of the cell. [0003] On the other hand, in order to control the accessing UEs, each UE will be given a corresponding access class (Access Class, hereinafter referred to as AC), and at the same time, the cell will notify the ACs that can be accessed and those that are prohibited into the AC. According to the current 3GPP protocol TS25.304, when the UE performs cell selection / reselection, it does ...

AI Technical Summary

Problems solved by technology

[0011] Since the UE does not care whether it can access the serving cell when it camps on the cell, when the cell access fails and the cell is reselected, it may be reselected to the cell because the signal of the original serving cell is the strongest; or Reselect to another cell, but this cell does not meet the UE access requirements

In fact, there may be other cells that meet the UE camping and access conditions, which will lead to service delays and increase call loss

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