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Method and device for selecting cell after loss of service

A cell selection and cell technology, applied in the field of mobile communication, can solve the problems of increased UE energy consumption and long selection time, and achieve the effect of reducing energy consumption and shortening time

Inactive Publication Date: 2010-06-09
洪涛 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a method and device for cell selection after service is lost, so as to solve the problems existing in the existing cell selection schemes that cause increased energy consumption of the UE and long selection time

Method used

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  • Method and device for selecting cell after loss of service
  • Method and device for selecting cell after loss of service

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Embodiment Construction

[0048] The basic idea of ​​the present invention is: perform initial cell selection, and record the PLMN identification, cell frequency point, and CSG cell identification of the cell with the best signal quality at each frequency point in the frequency band supported by the UE to form a PLMN_CSG record ; When the initial cell selection does not search for a suitable cell for the UE to camp on, select an available PLMN and an allowed CSG cell from the PLMN_CSG record; finally select a suitable cell for the UE to camp on based on the selected available PLMN and the allowed CSG cell district.

[0049] The implementation of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0050] figure 1 A flow chart showing a method for selecting a cell after service is lost according to an embodiment of the present invention, as shown in figure 1 shown, including:

[0051] S102, the AS performs initial cell selection, and r...

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Abstract

The invention discloses a method for selecting a cell after the loss of service, comprising the following steps of: executing initial cell selection and simultaneously recording a PLMN identification, a cell frequency point and a CSG cell identification to which a cell with the best signal quality on each frequency point belongs within a frequency band supported by a UE to form a PLMN_CSG record, wherein if the CSG cell identification exists, the CSG cell identification is a valid value, or else the CSG cell identification is an invalid value; selecting available parameters from the PLMN_CSG record when no suitable cell for residence is searched in the initial cell selection; and executing cell selection again on the basis of the selected available parameters and selecting suitable cell for residence for the UE. The invention also discloses a device for selecting the cell after the loss of theservice. The invention can reduce the energy consumption of the UE and also shorten the time required by the UE for executing cell selection.

Description

technical field [0001] The present invention relates to the field of mobile communication, more specifically, to a cell selection method and device after service is lost. Background technique [0002] In the Evolved Packet System (EPS, Evolved Packet System), when the user equipment (UE, User Equipment) is in the idle state (RRC_IDLE state), the serving cell and the adjacent cells configured in the system message will be checked according to the measurement results reported by the physical layer. During the evaluation, it will be found that the serving cell of the UE may appear: the quality of the serving cell drops rapidly, causing the quality of the serving cell of the UE to be lower than the S criterion for cell selection several times in a row. At this time, the UE will start the cell selection process for the adjacent cells configured in the system information, where the adjacent cells configured in the system information include intra-frequency cells, inter-frequency c...

Claims

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Application Information

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IPC IPC(8): H04W48/16H04W48/18
CPCY02B60/50Y02D30/70
Inventor 康书杰
Owner 洪涛
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