Method for triggering cell reselection/switching by mobile terminal

Abstract

The invention discloses a method for triggering cell reselection / switching by a mobile terminal. The method comprises the following steps: UE monitors a neighbor cell and a target cell after the neighbor cell satisfying a reselection / switching triggering condition is detected; within a triggering time, the UE respectively monitors the target cell and a service cell by using a relative signal quality index measured value and an absolute signal quality index measured value as cell signal quality values; the UE exits the cell reselection or switching triggering process if the target cell does not satisfy the reselection or switching triggering condition within the triggering time; and otherwise, the UE triggers a reselection or switching triggering event while the triggering time is satisfied. In a technical scheme of the invention, the reselection / switching triggering condition is judged within the triggering time by using the relative signal quality index measured value aiming at the service cell and the reselection / switching target cell, thereby reducing the dependence of the reselection / switching event triggering on the unreliable absolute signal quality index and improving the triggering accuracy of the reselection / switching event.

Description

technical field [0001] The present invention relates to a cell reselection / switching technology in a mobile communication system, and in particular to a method for a mobile terminal (referred to as UE) to trigger cell reselection / switching. Background technique [0002] In a mobile communication system, after the UE is turned on, it always selects a suitable cell (serving cell for short) to reside in, and then initiates service establishment on the serving cell or receives a service establishment request from the network to obtain wireless service . The UE acquires the surrounding wireless environment conditions by periodically measuring the signal quality of each adjacent cell in the adjacent cell list of the serving cell. When there is an adjacent cell whose signal quality is better than that of the serving cell, it will cause interference to the UE receiving the serving cell signal, which may cause the UE to receive network message decoding errors. Therefore, when the UE...

AI Technical Summary

Problems solved by technology

[0022] In the prior art, the measurement value of the beacon channel or pilot channel is the core basis for triggering the reselection / handover event; since the triggering location of the reselection / handover event is usually located at the edge of the logical cell, the signal quality, interference level, channel environment complexity, etc. all reflect obvious deterioration performance, and the UE's measurement results of the absolute signal quality of the beacon channel or pilot channel here are often unreliable; However, due to the increase in the error rate of the measurement results of the absolute signal quality of the beacon channel or pilot channel, the error probability of reselection / handover trigger conditions will increase, resulting in an increase in the error probability of reselection / handover events. Increase

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