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Method for rapidly acquiring subframe configuration in TD-LTE (time division long term evolution) system

A frame configuration and neutron technology, applied in communication between multiple stations, electrical components, wireless communication, etc., can solve problems such as increasing system complexity

Inactive Publication Date: 2015-05-20
INST OF INFORMATION ENG CAS
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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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  • Method for rapidly acquiring subframe configuration in TD-LTE (time division long term evolution) system
  • Method for rapidly acquiring subframe configuration in TD-LTE (time division long term evolution) system
  • Method for rapidly acquiring subframe configuration in TD-LTE (time division long term evolution) system

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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] 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.

[0058] 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).

[0059] 4. Th...

Embodiment 2

[0065] 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:

[0066] 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

[0067] 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.

[0068] 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.

[0069] 4. The detection device ob...

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Abstract

The invention discloses a method for rapidly acquiring subframe configuration in a TD-LTE (time division long term evolution) system; according to self-correlation properties of CRSs (cis-acting repressor sequences) in TD-LTE signals of subframes of different types, the type of each subframe is judged through a correlation operation, and therefore the uplink and downlink subframe configuration conditions of the system are inferred. According to the method disclosed by the invention, uplink and downlink types of all the subframes do not need to be judged, and only several specific subframes need to be judged, and thus, subframe configuration information can be judged; the method is not only restricted to performing uplink and downlink judgment on a small number of several specific subframes; the CRSs of all positions on one of the subframes do not need to be judged, and only the CRS on a certain specific symbol needs to be judged; the method is not only restricted to judging the CRS on the one symbol for one subframe; the method is not only restricted to performing correlation in a frequency domain but also can be used for performing the correlation in a time domain; meanwhile, threshold judgment is not restricted to a certain concrete 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. technical background [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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IPC IPC(8): H04B7/26H04W24/00
Inventor 王中方汪永明李晓娜谢雪
Owner INST OF INFORMATION ENG CAS
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