Cell reselection method and device, base station

Abstract

Disclosed are a cell reselection method, comprising: when a source cell determines that a UE meets an initial reselection condition of reselecting a target cell, the source cell performing a local search to find whether a reselection threshold parameter of reselecting the source cell from the target cell exists, if not, reselecting the target cell for the UE, and if yes, further determining whether a corresponding parameter of the UE in the source cell is smaller than or equal to the reselection threshold parameter, if not, not reselecting the target cell for the UE, and if yes, reselecting the target cell for the UE. Further disclosed are a cell reselection apparatus and a base station. The technical solution of the present invention avoids asymmetry of reselection policy between a TD cell and a GSM cell, avoids pingpong reselection between the TD cell and the GSM cell, shortens the duration that the paging of a VE is off during reselection, reduces the network load, and making the VE energy conservative.

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 ...

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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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