CN111294829B - Wireless communication interference method and device, and computer readable storage medium - Google Patents
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- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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Abstract
A wireless communication interference method and device, and a computer readable storage medium, the wireless communication interference method includes: synchronizing to a target LTE cell of the area; decoding and acquiring cell information corresponding to the target LTE cell in a decoding time period of a preset period, wherein the cell information comprises: identification information and bandwidth of the target LTE cell; according to the cell information, performing time alignment and frequency alignment on a base station corresponding to the target LTE cell; acquiring the CFI configuration of a downlink subframe according to the cell information; sending an inducing signal in the interference time period of the preset period, wherein the inducing signal comprises: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from a CFI coding indicated in a CFI configuration of the downlink subframe. By adopting the scheme, the transmitting power can be reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a wireless communication interference method and device and a computer readable storage medium.
Background
In some specific application scenarios, such as examination rooms and large conferences, there is a need to interrupt wireless communication. Currently, wireless communication interference is often employed to disrupt wireless communication in a particular area. In a Long Term Evolution (LTE) system, an interferer is used to transmit a strong signal on the same frequency as the cell signal to interfere with the data reception of the terminal device, interrupting the communication of the terminal device.
However, the transmission power of the jammer is currently large.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is that the transmitting power of the interference unit is larger.
To solve the foregoing technical problem, an embodiment of the present invention provides a wireless communication interference method, including: synchronizing to a target LTE cell of the area; decoding downlink data sent by a base station corresponding to the target LTE cell in a decoding time period of a preset period to obtain cell information corresponding to the target LTE cell, wherein the cell information comprises: identification information and bandwidth of the target LTE cell; according to the cell information, performing time alignment and frequency alignment on a base station corresponding to the target LTE cell; acquiring the CFI configuration of a downlink subframe according to the cell information; sending an inducing signal in the interference time period of the preset period, wherein the inducing signal comprises: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from a CFI coding indicated in a CFI configuration of the downlink subframe.
Optionally, the inducing signal is generated as follows: acquiring CFI codes indicated by CFI configuration of the downlink subframes; and mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency resource groups according to the identification information of the target LTE cell, filling 0 in other time-frequency resource grids, and generating the inducing signal.
Optionally, when the target LTE cell is a TDD cell, the cell information further includes: the CFI configuration of the uplink subframe configuration and the CFI configuration of the special subframe.
Optionally, when the target LTE cell is a TDD cell, the sending an inducing signal in the interference time period of the preset period includes: and sending the inducing signal at the position where the symbol of the downlink subframe is 0 and the symbol of the special subframe is 0.
Optionally, when the target LTE cell is an FDD cell, the sending an inducing signal in the interference time period of the preset period includes: and sending the inducing signal at the symbol 0 of the downlink subframe.
Optionally, the wireless communication interference method further includes: acquiring a time difference of delay; and according to the time delay time difference, carrying out time alignment on the transmitted induction signal and the air interface signal.
An embodiment of the present invention further provides a wireless communication interference apparatus, including: a synchronization unit adapted to synchronize to a target LTE cell of an area in which the synchronization unit is located; a decoding unit, adapted to decode downlink data sent by a base station corresponding to the target LTE cell in a decoding time period of a preset period, so as to obtain cell information corresponding to the target LTE cell, where the cell information includes: identification information and bandwidth of the target LTE cell; the first alignment unit is suitable for performing time alignment and frequency alignment on a base station corresponding to the target LTE cell according to the cell information; an obtaining unit, adapted to obtain a CFI configuration of a downlink subframe according to the cell information; a transmitting unit adapted to transmit a guidance signal in the interference time period of the preset cycle, the guidance signal including: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from a CFI coding indicated in a CFI configuration of the downlink subframe.
Optionally, the wireless communication interference apparatus further includes: a generating unit, adapted to obtain a CFI code indicated by the CFI configuration of the downlink subframe; and mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency resource groups according to the identification information of the target LTE cell, filling 0 in other time-frequency resource grids, and generating the inducing signal.
Optionally, when the target LTE cell is a TDD cell, the cell information further includes: the CFI configuration of the uplink subframe configuration and the CFI configuration of the special subframe.
Optionally, the sending unit is adapted to send the inducing signal when the symbol of the downlink subframe is 0 and the symbol of the special subframe is 0 when the target LTE cell is a TDD cell.
Optionally, the sending unit is adapted to send the guidance signal at a symbol of the downlink subframe is 0 when the target LTE cell is an FDD cell.
Optionally, the wireless communication interference apparatus further includes: a second alignment unit adapted to acquire a delay time difference of the wireless communication interference device; and according to the time delay time difference, time alignment is carried out on the transmitted induction signal and the air interface signal.
The embodiment of the present invention further provides a wireless communication interference apparatus, which includes a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes any of the above steps of the wireless communication interference method when executing the computer instructions.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has computer instructions stored thereon, where the computer instructions, when executed, perform any of the steps of the foregoing wireless communication interference method.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
and acquiring cell information of the target LTE cell, performing time alignment and frequency alignment on a base station corresponding to the target LTE cell according to the cell information, and acquiring CFI configuration of a downlink subframe. And sending an inducing signal in the interference time period of a preset period. Because the interference CFI code in the inducing signal is different from the CFI code indicated in the CFI configuration of the downlink subframe, the CFI configuration of the downlink subframe is interfered through the inducing signal to induce the terminal equipment in the covered area to decode the CFI error, so that the terminal equipment in the covered area interrupts communication.
Furthermore, the inducing signal only maps the disturbing CFI codes on the corresponding time-frequency resource groups, and other time-frequency resource grids which are not used for indicating the CFI codes are filled with 0, so that the transmitting energy can be further reduced, and the transmitting power can be reduced.
Further, an inducing signal is sent at the position where the symbol of the downlink subframe is 0 and the symbol of the special subframe is 0 to induce the terminal device not to correctly decode the PCFICH, so that the transmission power can be further reduced.
Drawings
Fig. 1 is a flow chart of a method of interfering with wireless communications in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless communication interference apparatus according to an embodiment of the present invention.
Detailed Description
As described above, in the LTE system, a strong signal having the same frequency as a cell signal is transmitted using an interferer to interfere with data reception by a terminal device, interrupting communication by the terminal device. The signal sent by the existing jammer is correlated in time domain, and is the same as the signal bandwidth of the cell in frequency domain, however, the transmission power of the jammer is larger.
In the embodiment of the invention, the cell information of the target LTE cell is obtained, the base station corresponding to the target LTE cell is subjected to time alignment and frequency alignment according to the cell information, and the CFI configuration of the downlink subframe is obtained. And sending an inducing signal in the interference time period of a preset period. Because the interference CFI code in the inducing signal is different from the CFI code indicated in the CFI configuration of the downlink subframe, the CFI configuration of the downlink subframe is interfered through the inducing signal to induce the terminal equipment in the covered area to decode the CFI error, so that the terminal equipment in the covered area interrupts communication.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for interference in wireless communication according to an embodiment of the present invention is shown. The method specifically comprises the following steps:
and step 11, synchronizing to the target LTE cell of the area.
In a specific implementation, the wireless communication interference can be performed on the set area by using an interference unit. Specifically, after the interferer is turned on, the interferer may synchronize to the target LTE cell in the region where the interferer is located.
And step 12, decoding downlink data sent by the base station corresponding to the target LTE cell in a decoding time period of a preset period to obtain cell information corresponding to the target LTE cell.
In specific implementation, the interferer periodically receives downlink data sent by the base station at a preset period, and decodes the received downlink data at a decoding time period of the preset period to obtain cell information corresponding to a target LTE cell, where the cell information includes: identification Information (ID), bandwidth of the target LTE cell.
In the implementation of the present invention, the predetermined period may be smaller than a paging period (paging). For example, the preset period is 1s, and the corresponding duration of the decoding time period is 10ms.
And step 13, according to the cell information, performing time alignment and frequency alignment on the base station corresponding to the target LTE cell.
In specific implementation, according to the downlink frequency of the base station corresponding to the target LTE cell indicated in the cell information, frequency alignment is performed on the base station corresponding to the target LTE cell, that is, the frequency of the interferer is the same as the downlink frequency of the base station corresponding to the target LTE cell. And, aligning with the base station's time, the interferer can be guaranteed to be synchronized in time with the base station.
And 14, acquiring the CFI configuration of the downlink subframe according to the cell information.
In an embodiment of the present invention, when the target LTE cell is a time-Frequency duplex (FDD) type cell (referred to as an FDD cell for short), a Control channel Indicator (CFI) configuration of a downlink subframe may be obtained from cell information.
In another embodiment of the present invention, when the target LTE cell is a Time Division Duplex (TDD) type cell (referred to as a TDD cell for short), the uplink and downlink subframe configurations may be obtained from the cell information, and then the CFI configuration of the downlink subframe and the CFI configuration of the special subframe are obtained.
And step 15, sending an inducing signal in the interference time period of the preset period.
In particular implementations, the preset period may include a decoding period and an interference period. The jammer may generate and transmit an inducing signal during an interference period of a preset period.
In the embodiment of the present invention, the inducing signal may include identification information of the target LTE cell and an interfering CFI code. The interfering CFI coding is different from the CFI coding indicated in the CFI configuration of the downlink subframe.
For example, the CFI configuration of the downlink subframe indicates that the CFI coding is 3 and the interfering CFI coding is 2. As another example, the CFI configuration of the downlink subframe indicates that the CFI coding is 3 and the interfering CFI coding is 1. Here, the specific representation of the interference CFI coding is not shown, and only needs to be different from the CFI coding indicated in the CFI configuration of the downlink subframe.
In an embodiment of the present invention, the inducing signal may be generated as follows: acquiring CFI codes indicated by CFI configuration of downlink subframes; according to the target LTE cell ID, mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency Resource groups (REGs), filling 0 in other time-frequency Resource lattices (Resource elements, REs) which are not used for indicating the CFI codes, and generating an inducing signal.
The induced signal generated by the above method can process only REG corresponding to the CFI code and fill 0 in other REs, so that the energy can be concentrated on the interference of the CFI code, the transmission energy of the jammer can be further reduced, the transmission power of the jammer can be further reduced, and the radiation to the covered area can be reduced.
In a specific implementation, when the target LTE cell is a TDD cell, the inducing signal may be sent at a symbol 0 of a downlink subframe and a symbol 0 of a special subframe, so as to induce that a terminal device in an interferer coverage area cannot decode a Physical Control Format Indicator Channel (PCFICH). The PCFICH is used to notify the terminal device of the size of the control region corresponding to the downlink subframe, that is, the number of OFDM symbols (OFDM symbols) occupied by the control region. Or, the PCFICH is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols used for transmitting a Physical Downlink Control Channel (PDCCH) in one Downlink subframe. And sending the inducing signal at the position where the symbol of the downlink subframe is 0 and the symbol of the special subframe is 0, so that the occupied transmitting energy can be further reduced, and the required transmitting power is reduced.
In the embodiment of the present invention, when the target LTE cell is an FDD cell, the inducing signal is sent at a position where the symbol of the downlink subframe is 0; so that the terminal equipment in the area covered by the interference unit cannot correctly decode the PCFICH, and further, the communication between the terminal equipment and the base station is interrupted. And at the position where the symbol of the downlink subframe is 0, the induction signal is sent, so that the occupied transmission energy can be further reduced, and the required transmission power is reduced.
In specific implementation, considering that a certain device delay exists in the jammer, in order to ensure that the pilot signal sent by the jammer and the downlink data sent by the base station can arrive at the terminal device at the same time, the delay time difference of the jammer can be obtained, and the transmitted pilot signal and the air interface signal are time-aligned according to the delay time difference.
In the embodiment of the present invention, the pilot signal may be sent in advance according to the delay time difference of the interferer, so that the pilot signal sent by the interferer and the downlink data sent by the base station can reach the terminal device at the same time. For example, the time difference of the delay of the jammer is T1, and the time of sending the inducing signal by the jammer each time is T1 earlier than the time of sending the downlink data by the base station.
For FDD cells with a bandwidth of 20MHz and a common Cyclic redundancy Prefix (CP), the interference effect of the interference unit using the wireless communication interference method provided by the above embodiment of the present invention is similar to that of the prior art in which the transmission power is the same
The effect of the interference device is equivalent; wherein 140 is a radio frameThe number of symbols in (1); 10 is the number of subframes included in a radio frame; 1200 represents a 20MHz total of 1200 subcarriers; 16 denotes that the inducement signal occupies 16 subcarriers.
For a TDD cell with a bandwidth of 20MHz CP, if the CFI configuration of uplink and downlink is 2, that is, one radio frame has 6 downlink subframes, 2 special subframes, and 2 uplink subframes. The interference effect of the interference unit adopting the wireless communication interference method provided by the above embodiment of the invention is the same as that of the transmission power in the prior art
The effect of the interference device is equivalent; wherein 140 is the number of symbols in a radio frame; 8 is the total number of downlink subframes and special subframes included in a radio frame; 1200 represents a 20MHz total of 1200 subcarriers; 16 denotes that the inducement signal occupies 16 sub-carriers.
According to the scheme, the cell information of the target LTE cell is obtained, the base station corresponding to the target LTE cell is subjected to time alignment and frequency alignment according to the cell information, and the CFI configuration of the downlink subframe is obtained. And sending an inducing signal in the interference time period of a preset period. Because the interference CFI code in the inducing signal is different from the CFI code indicated in the CFI configuration of the downlink subframe, the CFI configuration of the downlink subframe is interfered through the inducing signal to induce the terminal equipment in the covered area to decode the CFI error, so that the terminal equipment in the covered area interrupts communication.
In addition, when the target LTE cell is a TDD cell, the interferer always maintains time synchronization and frequency synchronization with the base station, and sends the inducing signal only at the position where the downlink subframe symbol is 0 and the special subframe symbol is 0, so that no interference is generated to the base station.
In specific implementation, the jammer in the foregoing embodiment may be based on a baseband chip of a mobile phone, and the configuration of the wireless communication jamming method in the foregoing embodiment of the present invention is implemented on the mobile phone by modifying a physical layer related code, so as to implement a function of the jammer. It will be appreciated that other devices may be employed as interferers.
In order to facilitate better understanding and implementation of the embodiments of the present invention for those skilled in the art, the embodiments of the present invention also provide a wireless communication jamming device.
Referring to fig. 2, a schematic structural diagram of a wireless communication apparatus in an embodiment of the present invention is shown. The wireless communication apparatus 20 may include:
a synchronization unit 21 adapted to synchronize to a target LTE cell of an area in which the target LTE cell is located;
a decoding unit 22, adapted to decode, in a decoding time period of a preset period, downlink data sent by a base station corresponding to the target LTE cell to obtain cell information corresponding to the target LTE cell, where the cell information includes: identification information and bandwidth of the target LTE cell;
a first alignment unit 23, adapted to perform time alignment and frequency alignment on a base station corresponding to the target LTE cell according to the cell information;
an obtaining unit 24, adapted to obtain a CFI configuration of a downlink subframe according to the cell information;
a sending unit 25, adapted to send an inducing signal in the interference time period of the preset cycle, where the inducing signal includes: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from CFI coding indicated in CFI configuration of the downlink subframe.
In a specific implementation, the wireless communication device 20 may further include: a generating unit (not shown in fig. 2) adapted to obtain a CFI code indicated by a CFI configuration of the downlink subframe; and mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency resource groups according to the identification information of the target LTE cell, filling 0 in other time-frequency resource grids, and generating the induction signal.
In a specific implementation, when the target LTE cell is a TDD cell, the cell information further includes: the CFI configuration of the uplink subframe configuration and the CFI configuration of the special subframe.
In a specific implementation, the transmitting unit 25 may be adapted to transmit the inducing signal at a symbol of 0 in the downlink subframe and a symbol of 0 in the special subframe when the target LTE cell is a TDD cell.
In a specific implementation, the transmitting unit 25 may be adapted to transmit the inducing signal at symbol 0 of the downlink subframe when the target LTE cell is an FDD cell.
In a specific implementation, the wireless communication interference apparatus 20 may further include: a second alignment unit (not shown in fig. 2) adapted to acquire a delay time difference of the wireless communication interfering device; and according to the time delay time difference, carrying out time alignment on the transmitted induction signal and the air interface signal.
In a specific implementation, the working principle and the working flow of the wireless communication interference apparatus 20 may refer to the description of the wireless communication interference method in the above embodiment of the present invention, and are not described herein again.
The embodiment of the present invention further provides another wireless communication interference apparatus, which includes a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the steps of the wireless communication interference method provided in any of the above embodiments of the present invention.
The embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has computer instructions stored thereon, where the computer instructions, when executed, perform the steps of the wireless communication interference method provided in any of the above embodiments of the present invention.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, and the program may be stored in any computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A method of wireless communication interference, comprising:
synchronizing to a target LTE cell of the area;
decoding downlink data sent by a base station corresponding to the target LTE cell in a decoding time period of a preset period to obtain cell information corresponding to the target LTE cell, wherein the cell information comprises: identification information and bandwidth of the target LTE cell;
according to the cell information, performing time alignment and frequency alignment on a base station corresponding to the target LTE cell;
acquiring the CFI configuration of a downlink subframe according to the cell information;
sending an inducing signal in the interference time period of the preset period, wherein the inducing signal comprises: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from a CFI coding indicated in a CFI configuration of the downlink subframe.
2. The method of claim 1, wherein the inducing signal is generated as follows:
acquiring CFI codes indicated by the CFI configuration of the downlink subframe;
and mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency resource groups according to the identification information of the target LTE cell, filling 0 in other time-frequency resource grids, and generating the inducing signal.
3. The method of claim 1, wherein when the target LTE cell is a TDD cell, the cell information further comprises: the CFI configuration of the uplink subframe configuration and the CFI configuration of the special subframe.
4. The method of claim 3, wherein when the target LTE cell is a TDD cell, the sending an inducing signal in the interference time period of the preset period comprises:
and sending the inducing signal at the position where the symbol of the downlink subframe is 0 and the symbol of the special subframe is 0.
5. The method of claim 1, wherein when the target LTE cell is an FDD cell, the sending an inducing signal in the interference period of the preset period comprises:
and sending the inducing signal at the symbol 0 of the downlink subframe.
6. The method of any one of claims 1 to 5, further comprising:
acquiring a time difference of delay;
and according to the time delay time difference, carrying out time alignment on the transmitted induction signal and the air interface signal.
7. A wireless communication jamming device, comprising:
a synchronization unit adapted to synchronize to a target LTE cell of an area in which the synchronization unit is located;
a decoding unit, adapted to decode downlink data sent by a base station corresponding to the target LTE cell in a decoding time period of a preset period, so as to obtain cell information corresponding to the target LTE cell, where the cell information includes: identification information and bandwidth of the target LTE cell;
the first alignment unit is suitable for performing time alignment and frequency alignment on a base station corresponding to the target LTE cell according to the cell information;
an obtaining unit, adapted to obtain a CFI configuration of a downlink subframe according to the cell information;
a transmitting unit adapted to transmit a guidance signal in the interference time period of the preset cycle, the guidance signal including: target LTE cell identification information and interference CFI coding; the interfering CFI coding is different from a CFI coding indicated in a CFI configuration of the downlink subframe.
8. The wireless communication jamming device of claim 7, further comprising: a generating unit, adapted to obtain a CFI code indicated by the CFI configuration of the downlink subframe; and mapping interference CFI codes different from CFI codes indicated in the CFI configuration of the downlink subframe to corresponding time-frequency resource groups according to the identification information of the target LTE cell, filling 0 in other time-frequency resource grids, and generating the inducing signal.
9. The wireless communication interference apparatus of claim 7, wherein when the target LTE cell is a TDD cell, the cell information further comprises: the CFI configuration of the uplink subframe configuration and the CFI configuration of the special subframe.
10. The wireless communication interference apparatus of claim 9, wherein the transmitting unit is adapted to transmit the inducing signal at a symbol of 0 in the downlink subframe and a symbol of 0 in the special subframe when the target LTE cell is a TDD cell.
11. The wireless communication interference apparatus of claim 7, wherein the transmitting unit is adapted to transmit the inducing signal at symbol 0 of the downlink subframe when the target LTE cell is an FDD cell.
12. The wireless communication interference apparatus according to any one of claims 7 to 11, further comprising: a second alignment unit adapted to acquire a delay time difference of the wireless communication interference device; and according to the time delay time difference, time alignment is carried out on the transmitted induction signal and the air interface signal.
13. A wireless communication interference apparatus comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the wireless communication interference method according to any one of claims 1 to 6.
14. A computer readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having stored thereon computer instructions, which when executed by a processor, perform the steps of the wireless communication interference method according to any one of claims 1 to 6.
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| CN105340348A (en) * | 2013-04-05 | 2016-02-17 | 高通股份有限公司 | Interference cancellation/suppression in TDD wireless communications systems |
| CN104661313A (en) * | 2013-11-22 | 2015-05-27 | 上海朗帛通信技术有限公司 | Downlink auxiliary information sending method and device |
| CN108259123A (en) * | 2016-12-28 | 2018-07-06 | 深圳市中兴微电子技术有限公司 | A kind of parameter blind detection method and system |
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