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Multi-cell information source generating and sending method and device for LTE signal shielding system

A technology of signal shielding and sending method, applied in the field of communication, can solve the problems of complex implementation and high implementation cost, and achieve the effect of reducing the number of transmission channels, the number of data, and the cost and complexity of implementation

Active Publication Date: 2019-11-19
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the shielding system operates effectively, it needs to generate N sets of data at the same time and transmit them through N channels. The implementation cost is high and the implementation is relatively complicated.

Method used

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  • Multi-cell information source generating and sending method and device for LTE signal shielding system
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  • Multi-cell information source generating and sending method and device for LTE signal shielding system

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Embodiment 1

[0051] The constituent units of the LTE signal shielding system of this embodiment are as follows figure 2 Shown. Assume that there are two cells under a certain 1850M frequency in the shielded area. The physical cell IDs of the cells are 139 and 38 respectively. The main parameters of the cell are 3M bandwidth, Normal CP, and 2 antennas. The TAC of the cell with PCI=139 is 33536, PCI= The cell TAC value of 38 is 15089.

[0052] The multi-cell source generation in this example is divided into two steps.

[0053] The first step: Generate baseband data for the cell with PCI=139 and the cell with PCI=38 respectively, and the data length is 10ms.

[0054] Taking subframe 0 of the PCI=139 cell as an example to illustrate the mapping of channels in a single cell, the mapping of channels in other subframes is similar. Various channels such as PSS, SSS, CRS, PBCH, PDSCH, PDCCH, PCFICH, etc. are mapped to the corresponding time and frequency positions specified in the agreement. PBCH carr...

Embodiment 2

[0064] This embodiment is based on embodiment 1:

[0065] The multi-cell signal source generation scheme in Embodiment 1 first generates frequency domain data, then changes to the time domain, and operates on the time domain data. The combined time domain data is also represented by a time function. In this embodiment, the frequency domain data of different cells are first merged, and then the time domain change is performed. The essence of the two is the same, and the essence is still realized by the technical solution of the present invention.

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Abstract

The invention discloses a multi-cell information source generating and sending method and a device for an LTE signal shielding system. The method comprises the steps of generating data according to the number of frequency points of a service base station in a shielding area; and setting that P frequency points and Q cells exist in the shielding area, if P is less than Q, generating a group of databy each frequency point, combining each group of data with a plurality of cell data, generating P groups of data corresponding to the Q cells in total, and transmitting the combined P groups of datathrough medium radio frequency processing. According to the information source generating and sending method and the device, data of multiple cells under one frequency point can be integrated, under the condition that multiple cells exist at one frequency point, the number of data needing to be generated by a shielding system can be reduced, the number of transmitting channels needed by the shielding system is reduced, and therefore the implementation cost and complexity are reduced.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a method and equipment for generating and transmitting multi-cell information sources for an LTE signal shielding system. Background technique [0002] The LTE shielding system is mainly used in some special occasions to prevent leakage of mobile phone communication. There are many ways to implement it. There are ways to use white noise to indiscriminately interfere with LTE communication bands, and there are also ways to specifically interfere with LTE PSS (primary synchronization signal), SSS (secondary synchronization signal) or CRS (pilot signal). What's smarter is the shielding method of sending fake LTE system information by counterfeiting the LTE cell to make the LTE mobile phone disconnect from the network, thereby making it impossible to communicate. Among them, the method of imitating the LTE cell to send system information to achieve the purpose of shiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K3/00
CPCH04K3/62Y02D30/70
Inventor 龙杰锋
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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