Cell reselecting method and device, and base station

Abstract

The invention discloses a cell reselecting method, comprising the following steps of: locally searching for whether a reselection threshold parameter of reselection from a target cell to a source cell exists when the source cell determines that UE (User Equipment) satisfies the initial reselection condition of reselection to the target cell; if not, reselecting the UE to the target cell; and if the reselection threshold parameter exists, further determining whether the corresponding parameter of the UE in the source cell is smaller than or smaller than or equal to the reselection threshold parameter; and if the corresponding parameter is greater than the reselection threshold parameter, not reselecting the UE to the target cell, otherwise, reselecting the UE to the target cell. The invention also discloses a cell reselecting device and a base station. By the technical proposal provided by the invention, asymmetry of the reselection policies between a TD (Time Division) cell and a GSM (Global System for Mobile Communications) cell is avoided, ping-pong reselection between the TD cell and the GSM cell is prevented, the paging breaking time of the UE in the reselection period is shortened, the network load is reduced and the UE becomes energy-saving.

Description

technical field [0001] The invention relates to cell reselection technology, in particular to a cell reselection method, device and base station between different mobile communication systems. Background technique [0002] For the user equipment (UE, User Equipment) in the public land mobile network (PLMN, Public Land Mobile Network), in the Time Division Synchronous Code Division Multiple Access (TD-SCDMA, TimeDivision-Synchronous Code Division Multiple Access) system and global There are agreements on how to perform cell reselection between mobile communication systems (GSM, Global System of Mobile communication). [0003] Among them, the reselection of the UE from the TD-SCDMA system cell to the GSM cell is based on the relative value sorting method according to the protocol requirements. When the cell signal is better, it triggers cell reselection to GSM. [0004] The reselection from GSM to the TD-SCDMA system depends on the absolute threshold. Specifically, when the ...

AI Technical Summary

Problems solved by technology

[0005] From the above brief description of inter-system reselection, it can be understood that due to the asymmetry of the reselection principles between the GSM and TD-SCDMA systems, it may occur that both the reselection requirements from the TD-SCDMA system cell to the GSM cell are met, and the The reselection requirements from the GSM cell to the TD-SCDMA system cell will lead to ping-pong reselection, which will bring the following series of problems: first, the UE cannot receive paging during the reselection process, resulting in an increase in the paging disconnection time; Registration is required after reselection, which undoubtedly increases the network load, wastes UE resources, and shortens standby time

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