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LTE (Long Term Evolution) interference method and LTE interference system based on synchronization signals

A technology of synchronous signal and interference system, which is applied in the direction of communication interference, synchronization devices, wireless communication, etc., can solve problems such as failure to reach and affect people's health, and achieve reduced complexity, increased synchronous tracking time gap, and interference good effect

Active Publication Date: 2015-11-11
INST OF INFORMATION ENG CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equivalent isotropic radiation power of indoor jammers generally ranges from a dozen watts to tens of watts. In actual application scenarios, it does not meet the national "Electromagnetic Radiation Protection Regulations" and the industry's "Radiation Environmental Protection Management Guidelines - Electromagnetic Radiation Environment Impact Evaluation Methods and Standards”, long-term exposure to signal shielding environments will inevitably affect people’s health

Method used

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  • LTE (Long Term Evolution) interference method and LTE interference system based on synchronization signals
  • LTE (Long Term Evolution) interference method and LTE interference system based on synchronization signals
  • LTE (Long Term Evolution) interference method and LTE interference system based on synchronization signals

Examples

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Embodiment 1

[0037] This embodiment is an implementation of the interference method proposed by the present invention, that is, combined use of PSS and SSS signals for interference, the shielding system needs to be synchronized with the base station, and the shielding system generates and transmits the same signal as the base station at a specific time-frequency domain position. Multiple groups of interference signals, the implementation process of this method is described in detail below, the implementation process is as follows figure 1 shown.

[0038] 1. Shield system search frequency point information

[0039] The shielding system searches for the frequency point information of the base station in the shielded area. During the frequency sweep process, for the searched frequency point, it judges whether the correlation peak value of the synchronization signal reaches the set frequency sweep threshold. If it is greater than or equal to the threshold value, the frequency point is conside...

Embodiment 2

[0063] This embodiment is an implementation of the interference method proposed by the present invention, that is, the SSS signal is used alone for interference, the shielding system does not need to be synchronized with the base station, and the shielding system generates and transmits the same signal as the base station at a specific time-frequency domain position. For multiple groups of interference signals, the implementation process of this method will be described in detail below.

[0064] 1. Obtain the frequency point information and physical layer cell identity of the base station

[0065] Use some software or tools to search the frequency point information and physical layer cell identity information of the base station in the shielded area, determine the frequency point information and physical layer cell identity information that may have LTE signals, and input them to the shielding system.

[0066] 2. The shielding system generates and transmits interference signal...

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Abstract

The invention discloses an LTE (Long Term Evolution) interference method and an LTE interference system based on synchronization signals, which mainly comprises two schemes. According to the two schemes, 1) a shielding system does not need to be synchronized with a base station, that is, the shielding system searches frequency point information in a shielded area and sends one or more groups of PSS (Primary Synchronization Signal) or SSS (Secondary Synchronization Signal) interference signals by a certain frequency at or near a frequency point position where LTE signals main exist; and 2) synchronization information of the base station needs to be acquired, that is, frequency point information of the base station in the shielded area is searched, PSSs and SSSs sent by the base station are received, the shielding system is enabled to realize synchronization with the base station, and frame timing information and physical layer cell identity of a cell are acquired; the shielding system generates one or more groups of PSS or SSS interference signals according to the acquired physical layer cell identity; and the shielding system sends one or more groups of interference signals in a specific time-frequency domain range. The method and the system provided by the invention are low in transmitting power, and have no influences for the health of a human body. Meanwhile, the method and system do not affect an uplink channel and apply no interference to users in an unshielded area.

Description

technical field [0001] The invention relates to an LTE interference method and system based on a synchronization signal, and belongs to the technical field of wireless mobile communication. Background technique [0002] In recent years, the problem of mobile phone leaks has become increasingly prominent. In some special occasions, such as confidential meeting rooms, government departments, and military departments, it is necessary to shield the mobile phone signal and cut off the communication between the mobile phone and the outside world to prevent information leakage; for example, in the examination room, the use of mobile phone signal jammers can effectively prevent candidates from using Cheating on wireless communication tools, etc. In order to ensure information security or meet some specific needs, mobile phone signal jammers have been widely used in daily work and life. [0003] At present, there are many kinds of mobile phone signal jammers available on the market...

Claims

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Application Information

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IPC IPC(8): H04K3/00H04W56/00
Inventor 李晓娜谢雪段玉耀汪永明
Owner INST OF INFORMATION ENG CAS
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