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Method and device for detecting business time slot same frequency interference cell

A co-frequency cell and co-frequency interference technology, which is applied in the field of telecommunications, can solve the problems that household receivers cannot find and track co-frequency sub-cells, etc., and achieve good implementation effects and improved accuracy

Inactive Publication Date: 2010-03-31
MEDIATEK INC
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AI Technical Summary

Problems solved by technology

[0003] However, due to the randomness of the signals and the degree of interference of users interfering with co-frequency cells, existing methods and devices cannot enable user receivers to quickly discover and track changes in co-frequency cells that constitute interference

Method used

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  • Method and device for detecting business time slot same frequency interference cell
  • Method and device for detecting business time slot same frequency interference cell

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Embodiment Construction

[0039] Such as Figure 1~2 As shown: the present invention is realized by maintaining a list of same-frequency cells. Specifically, the same-frequency cell list can be represented by Intra_CellID[1..N], where N is the maximum number of same-frequency cells that can be processed. Here, the cell ID of each cell, that is, the basic Midamble code ID, is used to represent a cell. Initially, the same-frequency cell list contains only one cell, that is, the serving cell. Meanwhile, the cell ID of the serving cell is configured by the network side.

[0040] Looking further, starting from the user equipment (UE) receiving a signal in a service time slot, the Midamble part data of each subframe time slot is firstly stored. Then, the basic Midamble codes of the same-frequency cells detected in the same-frequency cell list Intra_CellID[1...N] are sequentially used to perform shift correlation with the stored Midamble part data. During this period, the data of the Midamble part of the c...

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Abstract

The invention relates to method and device for detecting a business time slot same frequency interference cell. The method comprises the following steps: storing Midamble partial data on a signal received by user equipment in a business time slot by setting a same frequency cell list; carrying out shift correlation on a basic Midamble code and the stored Midamble partial data of a detected same frequency cell and obtaining a correlated power spectrum of each cell; then obtaining the multipath information of each Midamble code; calculating the correlated power of each Midamble code according tothe multipath information and the power spectrum and obtaining an average power value; repeating the steps and periodically judging whether the signal still forms same frequency interference or not;and if the signal does not meet the condition of the same frequency interference, deleting the signal from the same frequency cell list. The detecting precision of the same frequency interference cellis greatly improved by introducing a multi-cell Midamble code correlated unit.

Description

technical field [0001] The invention relates to a detection method and a corresponding device applied to an interference signal, in particular to a detection method and a device applied to a same-frequency interference cell of a business time slot, and belongs to the technical field of electrical communication. Background technique [0002] In the prior art, for a user equipment with an established service, it will not only be interfered by other users working in the same time slot in the own cell, but also interfered by users working in the same carrier and the same time slot in the adjacent cell. Specifically, this kind of interference can be divided into interference from other users in the own cell and interference from users in the same-frequency neighbor cell. Therefore, in order to improve the user's receiving performance and avoid or reduce the situation that affects the quality of service such as call drop, the user receiver must not only eliminate the interference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04B1/707H04B17/00
Inventor 叶远方明胡劲忠周亮
Owner MEDIATEK INC
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