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Method for selecting main cell of user apparatus in mobile communication system

A technology for a mobile communication system and user equipment, which is applied in the field of selecting a primary cell for user equipment in a mobile communication system, can solve problems such as channel interference and inability to guarantee noise conditions, and achieve the effect of ensuring communication quality

Inactive Publication Date: 2005-03-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, selecting the UE's primary cell without considering the channel interference and noise conditions cannot ensure that the UE selects a cell with the best communication conditions as its primary cell

Method used

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  • Method for selecting main cell of user apparatus in mobile communication system
  • Method for selecting main cell of user apparatus in mobile communication system

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Embodiment Construction

[0017] The method of using SSDT in the prior art is to select the cell with the highest transmit signal power in the active set as the main cell to transmit service data, and at the same time restrict other cells in the active set to transmit service data information, thereby reducing interference to other users in the cell. However, if the UE only considers the signal power when selecting a cell, and does not consider channel interference and noise, it may select a cell with high signal power, interference, and noise as the primary cell, which will not help reduce downlink transmit power. Just aiming at this problem, the present invention improves the method for the UE to select the primary cell.

[0018] The method for user equipment to select a primary cell in a mobile communication system provided by the present invention is especially applicable to a WCDMA mobile communication system, and specific implementation methods are described as follows in conjunction with the acco...

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Abstract

A method for choosing the main cell by user equipment (UE) in mobile communication system includes measuring the signal / interference ratio of pilot signal for special physical control channel in each cell, determining the cell where said signal / interference ratio is optimal, and setting up it as its main cell. It can ensure high communication quality.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for user equipment to select a primary cell in a mobile communication system. Background technique [0002] At present, in the WCDMA (Wideband CDMA: Broadband CDMA) mobile communication system, the SSDT (Site Selection Transmit Diversity: base station selection transmit diversity) method is used to select a cell from the active set and set it as the primary cell of the UE (User Equipment: user equipment) , while the other cells in the active set are non-primary cells, the primary cell is responsible for transmitting service data, while the non-primary cell does not transmit service data, so as to reduce the interference to other users caused by multi-cell transmission, and the existence of non-primary cells guarantees The UE can quickly select the base station without the participation of the network; the active set is a set of multiple cells that keep in to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04W48/16H04W48/18H04W48/20
Inventor 李志明张泉岭
Owner HUAWEI TECH CO LTD