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Same-frequency cell detection method and device

A technology of co-frequency cell and detection method, applied in the field of communications, can solve problems such as increased power consumption and scheduling failure, and achieve the effects of eliminating interference, reducing measurement power consumption, and improving mobility performance

Active Publication Date: 2021-06-29
DATANG TELECOM TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, these two methods have obvious disadvantages. In the first method, the increase of scheduling will inevitably increase power consumption, which is very unfavorable for mobile devices.
In method 2, if the target cell is weak, it cannot be guaranteed that every detection will be successful, and scheduling failure will also occur. In addition, in method 2, false cells will still be measured, and additional power consumption is inevitable.

Method used

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  • Same-frequency cell detection method and device

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Embodiment 1

[0023] figure 1 It is a flow chart of a method for detecting cells of the same frequency provided by Embodiment 1 of the present invention, and this embodiment is applicable to the detection of cells of the same frequency. The method can be executed by the same-frequency cell detection device provided in the embodiment of the present invention, and the device can be realized by software and / or hardware. The device can be made into an application program and installed in the terminal. Such as figure 1 shown, including:

[0024] S110. Determine a candidate cell through signal detection.

[0025] Wherein, the number of candidate cells is at least one.

[0026] Specifically, a cell whose signal strength exceeds a preset strength may be used as a candidate cell. The candidate cells include not only target cells for co-frequency detection, but also interfering cells. According to the 3GPP-LTE_36.211 protocol, the maximum number of target cells for co-frequency detection can be...

Embodiment 2

[0056] Figure 2A It is a flow chart of a method for detecting same-frequency cells provided by Embodiment 2 of the present invention. This embodiment takes SSS signal detection as an example to describe the implementation of the present invention in detail. Since the downlink synchronization signal of LTE is composed of primary synchronization signal PSS and SSS, among them, the frame structure of PSS and SSS of TDD-LTE is as follows Figure 2B shown. Among them, SSS is generated in different ways on odd subcarriers and even subcarriers. On odd subcarriers of TTI0 / 5, the SSS sequence is given by and m 0 decision; on even subcarriers of TTI0 / 5, the SSS sequence is determined by m 0 and m 1 jointly decided, where m 0 and m 1 According to the 3GPP-LTE_36.211 agreement Look up the value obtained from the table. The subcarrier data mapping rules of SSS are as follows Figure 2C shown. According to the introduction of chapter 6.11.2 of the 3GPP-LTE_36.211 protocol, wh...

Embodiment 3

[0078] image 3 Shown is a schematic structural diagram of an intra-frequency cell detection device provided in Embodiment 5 of the present invention. This embodiment is applicable to the situation of same-frequency cell detection. The device can be realized by means of software and / or hardware. The device can be made into an application program and installed in the terminal. Such as image 3 As shown, it specifically includes: a candidate cell determination module 31 , a false cell determination module 32 and a target cell determination module 33 .

[0079] The candidate cell determination module 31 is used to determine the candidate cell by signal detection;

[0080] The false cell determination module 32 is used to screen out false cells from the candidate cells according to the parameters corresponding to each candidate cell;

[0081] The target cell determining module 33 is configured to use the remaining candidate cells among the candidate cells as target cells.

...

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Abstract

The embodiment of the present invention discloses a method and device for same-frequency cell detection. The method includes: determining candidate cells through signal detection; screening false cells from the candidate cells according to the parameters corresponding to each candidate cell; The remaining candidate cells in the cells are used as target cells. In the embodiment of the present invention, the false cells are screened out from the candidate cells according to the parameters corresponding to each candidate cell, and the remaining candidate cells in the candidate cells are used as the target cells, so that the interference of the false cells can be eliminated, so that the weak cell detection is not affected. While improving the performance, the measurement power consumption is reduced, and the mobile performance of the terminal is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and device for detecting cells of the same frequency. Background technique [0002] When co-frequency detection is performed in an LTE (Long Term Evolution, long term evolution) system, the detection of the target cell will be interfered by other cells. Especially in the TDD-LTE system, quasi-synchronization of all same-frequency cells causes their PSS (Primary Synchronization Signal, primary synchronization signal) and SSS (Secondary Synchronization Signal, secondary synchronization signal) to often overlap with each other. When performing correlation detection on the target cell, the existence of other cells will cause the correlation process to generate multiple false correlation peaks. When other cells are more than 10dB stronger than the target cell, there will often be a phenomenon that the correlation detection value of a large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04W36/00H04W36/30H04W12/122
CPCH04W12/12H04W24/08H04W36/30Y02D30/70
Inventor 叶露董亮张明林
Owner DATANG TELECOM TECH CO LTD
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