Method and system for shielding GSM mobile phone signal

A mobile phone signal and shielding system technology, applied in the direction of communication interference, electrical components, etc., can solve the problems of lack of TCH carrier shielding and inability to guarantee TCH carrier

Pending Publication Date: 2018-11-02
ZHEJIANG SUNWAVE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this technology has the following problems: In view of the characteristics of GSM, BCCH carrier is transmitted continuously, while TCH carrier is transmitted on demand, so the shielding of BCCH carrier in this patented technology is complete, but because the receiving time slot of TCH carrier has random There is no guarant

Method used

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  • Method and system for shielding GSM mobile phone signal
  • Method and system for shielding GSM mobile phone signal
  • Method and system for shielding GSM mobile phone signal

Examples

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Embodiment 1

[0035] The present invention will be described in detail below in conjunction with accompanying drawing and embodiment: figure 2 Shown, the present invention discloses a kind of shielding method of GSM mobile phone signal, and this method comprises the steps:

[0036] (1) Monitor all uplink frequencies in the shielded area and capture the uplink signals of GSM mobile phones;

[0037] (2) Using the characteristic that the uplink signal transmitted by the mobile phone has at least one uplink time slot period, detect and identify whether the uplink signal strength reaches the set power level threshold within the uplink time slot period, and judge whether the transmitting mobile phone is located within a shielded area;

[0038] (3) For the mobile phone determined to be located in the shielded area, transmit a shielding interference signal at the same time slot, so that the strength of the interference signal is greater than the strength of the uplink signal transmitted by the mo...

Embodiment 2

[0043] Such as Figure 4As shown, this embodiment discloses a GSM mobile phone signal shielding system, which mainly includes an uplink receiving antenna, a filter, a power detection comparator, a jamming transmitter and an uplink jamming antenna; the filter here is a carrier filter module. The uplink signal of the GSM mobile phone in the shielded area is captured by the uplink receiving antenna, filtered by the filter, and then sent to the power detection comparator to detect and identify whether the uplink signal strength reaches the set power level threshold during the uplink time slot period. And determine whether the mobile phone that transmits the uplink signal is located in the shielded area; for the mobile phone that is determined to be located in the shielded area, the power detection comparator sends a signal to the interference transmitter to notify the same time slot when the transmission intensity is greater than the uplink signal intensity emitted by the mobile ph...

Embodiment 3

[0045] Such as Figure 5 As shown, the inside of the ellipse in the figure is a shielding area with a large range. In this area, in addition to the shielding system (dotted frame), there are shielding device 1, shielding device 2, shielding device 3 and shielding device 4 . Different from Embodiment 2, the filter in the shielding system includes a carrier filter module and a shielding interference signal filtering module, wherein the carrier filtering module is used to filter the mobile phone uplink signal, and the shielding interference signal filtering module is used to filter other signals in the shielding area. The interference signal emitted by the jammer is filtered. The working center frequency of the carrier filter module and the shielding interference signal filter module are different, and the bandwidths are also different.

[0046] For the case of a large shielding range, it is usually necessary to arrange multiple shielding devices in the shielding area so that t...

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PUM

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Abstract

The invention discloses a method and a system for shielding a GSM mobile phone signal, which interferes with mobile phone uplink frequency to achieve shielding. The characteristic that an uplink signal transmitted by the mobile phone has at least one uplink time slot period is used, and it is detected and identified whether the uplink signal intensity reaches a set level threshold in the uplink time slot period, and it is determined whether the transmitting mobile phone is located in a shielding area accordingly; for the mobile phone determined to be located in the shielding area, shielding interference signals of the same time slot are transmitted, so that the intensity of the interference signals is greater than the intensity of the uplink signal transmitted by the mobile phone to interfere with the reception of the base station, thereby interrupting the communication of the mobile phone. A system for shielding a GSM mobile phone signal comprises an uplink receiving antenna, a filter, a power detection comparator, an interference transmitter, and an uplink interference antenna. By adopting the method and system provided by the invention, while shielding the GSM mobile phone signal, other users in the area are not affected; and signals are not transmitted when the mobile phone is not used, thereby reducing waste and reducing wireless signal pollution.

Description

technical field [0001] The invention relates to the shielding field of mobile communication, and mainly relates to a shielding method and system for GSM mobile phone signals. Background technique [0002] For the shielding of GSM mobile phones, most of them use the interference downlink frequency to achieve shielding. The combined fixed-frequency jammer formed by the combination of jammers, when targeting strong base station signals, usually selects several frequency points to strengthen interference at the strongest nearby base stations, that is, N-point frequency interference. Take the same frequency band signal as an example, if there are two operators’ base stations, for example, one operator’s base station is close and the signal is strong, and the other operator’s base station is far away and the signal is weak, then the shielding strength should be based on the strongest signal For base stations with weak signals, because the shielding is set according to the stronge...

Claims

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Application Information

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IPC IPC(8): H04K3/00
CPCH04K3/62Y02D30/70
Inventor 曹永福张宏亮邵雪平周亚良
Owner ZHEJIANG SUNWAVE COMM TECH CO LTD
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