Method and device for realizing cell reselection

Abstract

The invention discloses a method and device for realizing cell reselection. The method comprises the following steps of: acquiring measurements of a serving cell and a reselected neighbor cell; acquiring relative measurements of the serving cell and the reselected neighbor cell respectively according to the measurements of the serving cell and the reselected neighbor cell; calculating a path loss standard parameter; determining that the path loss standard parameter is greater than 0, classifying the obtained relative measurements of the reselected neighbor cell according to GSM (Global System for Mobile communications) and TD (Time Division), sequencing the classified relative measurements of the reselected neighbor cell and the obtained relative measurements of the serving cell, and respectively forming a GSM reselected neighbor cell sequence and a TD reselected neighbor cell sequence; and determining a TD reselected neighbor cell the relative measurement of which is greater than that of the serving cell exists in the TD reselected neighbor cell sequence, and judging that UE (User Equipment) reselects to the TD reselected neighbor cell with highest sequence after the TD reselected neighbor cell with highest sequence in the TD reselected neighbor cell sequence keeps a preset reselection time. Through applying the method and device disclosed by the invention, the reselection frequency from TD to GSM can be reduced, and the user perception is improved.

Description

technical field [0001] The invention relates to the reselection technology of mobile communication cells, in particular to a method and device for realizing cell reselection. Background technique [0002] In the current communication network, there are different types of mobile networks. When the user equipment (UE, UserEquipment) moves in different areas, according to the measured wireless channel parameters, when the pre-set conditions are met, it needs to start from one type of mobile network. Mobile network reselection or switching to another type of mobile network, for example, switching from an area covered by a Time Division (TD, Time Division) network, reselecting into a network covered by a Global System for Mobile Communication (GSM, Global System for Mobile Communication) area for normal communication. [0003] The third generation mobile communication standardization partnership project (3GPP, 3rd Generation Partnership Project) agreement (3GPP TS 25.304) stipul...

AI Technical Summary

Problems solved by technology

Because there is no priority algorithm in the existing judgment mechanism, when the parameter setting is unreasonable, it is easy to cause ping-pong reselection between TD and GSM systems. For example, when the SsearchInter-RAT setting is large, the UE starts to measure when the TD signal is good. GSM system signal, in the absence of priority algorithm, it is very easy to reselect from TD to GSM

In addition, when the signal of the serving cell (TD cell) is deeply fading instantaneously, such as street corners, elevators, etc., no matter how SsearchInter-RAT is set, the signal strength of the serving cell will directly drop to the set GSM neighbor detection threshold SsearchInter-RAT Under the circumstances, since there is no reselection decision priority algorithm, it is easy to cause reselection between the TD system and the GSM system

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