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A method for quickly obtaining subframe configuration in td-lte system

A technology of subframe configuration and frame configuration, which is applied to communication between multiple stations, electrical components, wireless communication, etc., and can solve problems such as increasing system complexity.

Inactive Publication Date: 2018-01-19
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the above scenarios that require subframe configuration, using this method to solve the system information will greatly increase the complexity of the system, and it is not necessary to implement it in this way

Method used

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  • A method for quickly obtaining subframe configuration in td-lte system
  • A method for quickly obtaining subframe configuration in td-lte system
  • A method for quickly obtaining subframe configuration in td-lte system

Examples

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Embodiment 1

[0055] In this embodiment, the peak-to-average ratio is used as a comparison value, and the subframe configuration is 1, that is, the 5ms subframe configuration structure of DSUUDDSUUD is described as an example. The specific process is as image 3 As shown, the implementation steps are as follows:

[0056] 1. After the detection device is turned on, it searches for nearby LTE cells, synchronizes with the base station, and obtains the physical layer cell identification information

[0057]

[0058] 2. Receive the PBCH information sent by the base station, and obtain the transmit antenna configuration information, CP length, system frame number, and system bandwidth of the base station through blind detection.

[0059] 3. The detection device obtains the time-domain data of any wireless frame sent by the base station according to the cell bandwidth information and synchronization results, and converts it into frequency-domain data through FFT (Fast Fourier Transform).

[0...

Embodiment 2

[0066] In this embodiment, the peak value is used as a comparison value, and the subframe configuration is 1, that is, the 5ms subframe configuration structure of DSUUDDSUUD is described as an example. The specific process is as image 3 As shown, the implementation steps are as follows:

[0067] 1. After the detection device is turned on, it searches for nearby LTE cells, synchronizes with the base station, and obtains the physical layer cell identification information

[0068]

[0069] 2. Receive the PBCH information sent by the base station, and obtain the transmit antenna configuration information, CP length, system frame number, and system bandwidth of the base station through blind detection.

[0070] 3. The detection device obtains the time-domain data of any wireless frame sent by the base station according to the cell bandwidth information and synchronization results, and converts it into frequency-domain data through FFT transformation.

[0071] 4. The detection...

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Abstract

The invention discloses a method for quickly obtaining subframe configuration in a TD‑LTE system. According to the autocorrelation characteristics of CRS in TD‑LTE signals of different types of subframes, the type of each subframe is judged through correlation operations, thereby inferring Configuration of the uplink and downlink subframes of the system. The method of the present invention does not need to judge the uplink and downlink types of all subframes, and only needs to find a few specific subframes for judgment to judge the subframe configuration information, and is not limited to finding a small number of specific subframes for uplink and downlink judgment ; There is no need to judge the CRS of all positions on a subframe, only the CRS on a specific symbol is used for judgment, and for a subframe, it is not limited to only using the CRS on one symbol for judgment; it is not limited to the frequency domain for correlation, It can also be in the time domain, and at the same time, the judgment threshold is not limited to a certain specific value.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for quickly acquiring subframe configuration in a TD-LTE system. Background technique [0002] In the TD-LTE (TD-SCDMA Long Term Evolution, TD-SCDMA Long Term Evolution) system, the signal transmission adopts time division duplex technology, and each radio frame (10ms) of the signal is divided into 10 different types of subframes , uplink and downlink data are transmitted on different subframes within the same radio frame, except for special subframes, each subframe can only transmit uplink or downlink data fixedly. The subframe configuration adopted by each radio frame depends on the configuration type selected by the cell where it resides. [0003] At present, many application scenarios need to obtain the subframe configuration of the LTE system to distinguish uplink and downlink signals, such as relay for amplification and forwarding, abnormal signal det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04W24/00
Inventor 王中方汪永明李晓娜谢雪
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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