A signal shielding method, apparatus, and medium

Abstract

Embodiments of the present application provide a signal shielding method, device and medium, the method comprising: filling a common search space with data generated at a first aggregation level and a first radio network temporary identifier, filling a user search space with data generated at a second aggregation level and a second radio network temporary identifier, generating a control symbol; rotating a reference signal by a phase vector; filling a data symbol with reference data; generating a downlink shielding signal based on the control symbol, the reference signal, the data symbol and a primary and secondary synchronization signal, and shielding a signal based on the downlink shielding signal. The present application generates a shielding signal based on a wireless communication frame format, destroys physical layer decoding and receiving processes, and effectively reduces a signal-to-interference-and-noise ratio of a communication network. Even if a user terminal is in a flight state or a normal use state, signal shielding can still be achieved, and signal shielding effect is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of wireless communication, and more specifically to a signal shielding method, apparatus, and medium. Background Technology

[0002] Confidential locations, schools, and other similar venues require shielding against 4G / 5G wireless communication networks. However, due to health concerns, the power of the shielding signal is limited, necessitating an improvement in the shielding effectiveness.

[0003] White noise-based signal jammers increase noise to reduce the signal-to-noise ratio (SNR) of communication signals. Often, the noise level needs to be 10dB higher than the signal to be effective. However, their effectiveness is generally limited when transmission power is restricted. Signaling based on the RRC (Radio Resource Control) layer, which allows mobile phones to automatically block certain frequencies / cells, only requires the blocking signal to be 3-6dB higher than the public network signal to be effective. However, this method has strict usage scenarios, requiring the phone to be powered on or in flight. It is ineffective for phones already connected to the network (in normal use scenarios, standby or in use).

[0004] As can be seen from the above description, the current signal shielding methods have poor shielding effects. How to improve the signal shielding effect is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To overcome the shortcomings of existing signal shielding methods with poor performance, this invention proposes a signal shielding method, device, and medium.

[0006] To achieve the above objectives, according to a first aspect of the present invention, an embodiment of the present invention provides a signal shielding method, the method comprising the following steps:

[0007] In the downlink control channel, the common search space is filled with data generated by the first aggregation level and the first wireless network temporary identifier, and the user search space is filled with data generated by the second aggregation level and the second wireless network temporary identifier to generate control symbols.

[0008] Rotate the reference signal by the phase vector;

[0009] Fill in the data symbols using reference data;

[0010] A downlink shielding signal is generated based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal, and signal shielding is performed based on the downlink shielding signal.

[0011] Optionally, before generating control symbols, the method further includes: when the wireless communication network is LTE, determining the number of control symbols by the physical control format indication channel, so as to generate control symbols according to the number of control symbols; when the wireless communication network is NR, obtaining the time-frequency resource location of the downlink control channel according to the public network CORESET configuration, so as to generate control symbols according to the time-frequency resource location.

[0012] Optionally, filling the public search space with data generated by the first aggregation level and the first wireless network temporary identifier includes filling the public search space with data generated by the first aggregation level being 16 and the first wireless network temporary identifier being 0xFFFF; filling the user search space with data generated by the second aggregation level and the second wireless network temporary identifier includes filling the user search space with data generated by the second aggregation level being 8 and the second wireless network temporary identifier being a random number.

[0013] Optionally, the phase vector rotation of the reference signal includes, when the wireless communication network is LTE, rotating the cell reference signal by the phase vector; when the wireless communication network is NR, rotating the demodulation reference signal by the phase vector; the formula is as follows:

[0014]

[0015] in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol; It represents the reference signal, and in LTE networks it is the cell reference signal (CRS), and in NR networks it is the demodulation reference signal (DM-RS). The reference signal is characterized after rotation.

[0016] Optionally, the reference data may include random data or 0.

[0017] Optionally, a downlink masking signal is generated based on the control symbol, the reference signal, the data symbol, and the primary / secondary synchronization signal. The downlink masking signal is represented as follows:

[0018]

[0019] in, Characterizing downlink shielded signal, Characterizing the master-slave synchronization signal, Control symbols characterizing the downlink physical control channel Characterize the reference signal, Data symbols representing the downlink physical shared channel.

[0020] According to a second aspect of the present invention, embodiments of the present invention also provide a signal shielding device, comprising:

[0021] The control symbol generation module is used to fill the common search space with data generated by the first aggregation level and the first radio network temporary identifier in the downlink control channel, and fill the user search space with data generated by the second aggregation level and the second radio network temporary identifier to generate control symbols.

[0022] Reference signal rotation module, used to rotate a reference signal by a phase vector;

[0023] The data symbol filling module is used to fill data symbols with reference data.

[0024] The shielding signal generation module is used to generate a downlink shielding signal based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal, so as to perform signal shielding based on the downlink shielding signal.

[0025] Optionally, the control symbol generation module is further configured to: when the wireless communication network is LTE, determine the number of control symbols by the physical control format indication channel, and generate control symbols according to the number of control symbols; when the wireless communication network is NR, obtain the time-frequency resource location of the downlink control channel according to the public network CORESET configuration, and generate control symbols according to the time-frequency resource location.

[0026] Optionally, the control symbol generation module filling the public search space with data generated from the first aggregation level and the first wireless network temporary identifier includes filling the public search space with data generated from the first aggregation level of 16 and the first wireless network temporary identifier of 0xFFFF; the filling the user search space with data generated from the second aggregation level and the second wireless network temporary identifier includes filling the user search space with data generated from the second aggregation level of 8 and the second wireless network temporary identifier of a random number.

[0027] Optionally, the reference signal rotation module is used to rotate the cell reference signal by phase vector when the wireless communication network is LTE; and to rotate the demodulation reference signal by phase vector when the wireless communication network is NR; the formula is as follows:

[0028]

[0029] in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol; It represents the reference signal, and in LTE networks it is the cell reference signal (CRS), and in NR networks it is the demodulation reference signal (DM-RS). The reference signal is characterized after rotation.

[0030] Optionally, the data symbol filling module fills the data symbols with reference data, which includes random data or 0.

[0031] Optionally, the shielding signal generation module generates a downlink shielding signal based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal. The downlink shielding signal is represented as follows:

[0032]

[0033] in, Characterizing downlink shielded signal, Characterizing the master-slave synchronization signal, Control symbols characterizing the downlink physical control channel Characterize the reference signal, Data symbols representing the downlink physical shared channel.

[0034] According to a third aspect of the present invention, embodiments of the present invention also provide a storage medium storing at least one instruction, at least one program, a code set, or an instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the steps of the signal shielding method as described in any of the above embodiments.

[0035] As described above, the signal shielding method, apparatus, and medium provided by the embodiments of the present invention have the following beneficial effects: Control symbols are generated by filling the common search space with data generated from a first aggregation level and a first wireless network temporary identifier in the downlink control channel, and filling the user search space with data generated from a second aggregation level and a second wireless network temporary identifier; a reference signal is rotated by a phase vector; data symbols are filled with reference data; a downlink shielding signal is generated based on the control symbols, the reference signal, the data symbols, and the primary / secondary synchronization signal, and signal shielding is performed based on the downlink shielding signal. The present invention generates a shielding signal based on the wireless communication frame format, disrupting the physical layer decoding and reception process, effectively reducing the signal-to-interference-plus-noise ratio (SIR) of the communication network, and achieving signal shielding even when the user terminal is in flight or normal use, effectively improving the signal shielding effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a user terminal access process provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic flowchart of a signal shielding method provided in an embodiment of the present invention;

[0038] Figure 3This is a schematic diagram of an LTE frame structure provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of an NR frame structure provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of a signal shielding device provided in an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0042] Please see Figures 1 to 5 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] To clearly illustrate the signal blocking method provided in this embodiment of the invention, the process of a user terminal (such as a mobile phone) accessing the network is first described, see [link to relevant documentation]. Figure 1 This is a schematic diagram of a user terminal access process provided by an embodiment of the present invention. Based on the process of a user terminal accessing the network, especially the detailed process of a user terminal receiving downlink signals, the embodiments of the present invention analyze the links that are more susceptible to interference, and propose a signal shielding method according to these characteristics.

[0044] The first step is MIB parsing. The user terminal (e.g., a mobile phone, represented by UE in the diagram) needs to detect the primary and secondary synchronization signals (PSS / SSS) of the cell through the cell search process, obtain the cell's physical identifier, and maintain time-frequency synchronization with the cell. In the diagram, eNB represents the base station. The user terminal receives the broadcast channel (PBCH) and parses the Master Information Block Message (MIB).

[0045] The second step is SIB parsing. The user terminal needs to find the schedule corresponding to the system message on the downlink control channel (PDCCH), and then receive the data on the downlink shared channel (PDSCH) according to the schedule message. After protocol parsing, the system message (SIB) is obtained.

[0046] The third step is random access. The user terminal sends a random access signal (PRACH) to request access. After processing of subsequent messages (as shown by MSG2-MSG5 in the figure), it accesses the network.

[0047] In the fourth step, downlink data, the user terminal detects the downlink scheduling message corresponding to the RNTI (Radio Network Temporary Identifier) ​​on the downlink control channel (PDCCH), and then receives data on the downlink shared channel according to the scheduling message.

[0048] In the fifth step, uplink data transmission, the user terminal detects the uplink scheduling message corresponding to the RNTI on the downlink control channel (PDCCH), and then transmits data on the uplink shared channel according to the scheduling message.

[0049] Analyzing the above processing steps, the SIB parsing and downlink data reception processes share similar characteristics: both require finding the corresponding scheduling message on the PDCCH before processing can proceed on the corresponding shared data channel. The PBCH / PDCCH / PDSCH reception processing flow is also similar. After detecting that the PSS / SSS signal has completed synchronization, OFDM symbol demodulation can be performed. After conversion to the frequency domain, channel estimation is first performed based on the reference signal, followed by equalization, symbol demodulation, and decoding operations on the data symbols. Therefore, the shielding signal designed in this embodiment of the invention is used to interfere with the base station's downlink (sent from the base station to the user terminal), i.e., to generate interference at the most common step in the downlink reception processing.

[0050] Specifically, see Figure 2 This is a flowchart illustrating a signal shielding method provided in an embodiment of the present invention, as shown below. Figure 2 As shown in the figure, this embodiment of the invention illustrates the process of performing signal shielding during downlink.

[0051] Step S101: In the downlink control channel, fill the common search space with the data generated by the first aggregation level and the first wireless network temporary identifier, and fill the user search space with the data generated by the second aggregation level and the second wireless network temporary identifier to generate control symbols.

[0052] In the first implementation scenario, when the wireless communication network is LTE, according to the 3GPP protocol, each downlink subframe of LTE is divided into control symbols and data symbols. The number of control symbols is specified by the PCFICH physical control format indicator channel. The control symbols mainly transmit the PDCCH physical channel (carrying downlink and uplink scheduling information). The DCI information carried on the PDCCH channel has different aggregation levels (AL), and the user terminal needs to try different aggregation levels. Each downlink subframe of LTE transmits a cell reference signal (CRS) to assist in channel estimation and cell measurement.

[0053] See Figure 3 This is a schematic diagram of an LTE frame structure provided in an embodiment of the present invention, as shown below. Figure 3 As shown, a subframe consisting of two time slots is illustrated, with each time slot containing seven OFDM symbols (l=0, 1, 2, 3, 4, 5, 6). The first three OFDM symbols (grid shaded areas) of this subframe constitute the downlink control channel (PDCCH), carrying scheduling and control signaling. Symbols R0 at l=0 and l=4 constitute the cell reference signal (Cell RS), and one R0 is placed every six subcarriers. The OFDM symbols excluding PDCCH and Cell RS constitute the PDSCH (blank area), carrying data symbols.

[0054] For example, each subframe has a fixed PCFICH (e.g., 3, meaning the first 3 symbols are control symbols); the common search space of PDCCH is filled entirely with data generated by AL=16 and RNTI=0xFFFF, and the user search space is filled entirely with data randomly generated by AL=8 and RNTI, thus obtaining the final control symbols.

[0055] In the second implementation scenario, when the wireless communication network is NR, 5G NR adjusts the physical layer reference signals and physical channels, removing cell signals and avoiding continuously transmitted periodic signals. NR downlink physical signals include Channel State Information Reference Signal (CSI-RS), Demodulation Reference Signal (DM-RS), Tracking Reference Signal (TRS), Phase Noise Tracking Reference Signal (PT-RS), RRM Measurement Reference Signal, and RLM Measurement Reference Signal, etc.

[0056] The physical channels defined by NR include: the Physical Broadcast Channel (PBCH), which carries a portion of the minimum system information required for a UE to access the network; the Physical Downlink Control Channel (PDCCH), used to transmit DCI (Distributed Information Channel), primarily for scheduling information required by the UE to receive the PDSCH and transmit the Physical Uplink Shared Channel (PUSCH), and can also transmit Slot Format Indicator (SFI) and Preemption Indication (PI), etc.; and the Physical Downlink Shared Channel (PDSCH), mainly used for downlink unicast data transmission, and can also be used for paging messages and system messages.

[0057] In NR systems, the PDCCH is typically located within the first 1-3 symbols of a time slot, specifically configured by the control resource set (CORESET), followed by the demodulation reference signal of the PDSCH. See also... Figure 4 This is a schematic diagram of an NR frame structure provided in an embodiment of the present invention, as shown below. Figure 4 The diagram shows the frame structure of one time slot, which includes 14 OFDM symbols. The first two OFDM symbols (gray area) of the time slot are PDCCH, carrying downlink scheduling and control signaling. The OFDM symbol adjacent to the PDCCH (striped area) is the demodulation reference signal (DM-RS). The OFDM symbol located horizontally across the middle of the frequency domain (grid area) is the phase tracking reference signal (PT-RS), which compensates for phase noise and improves demodulation performance in high-frequency scenarios. The other areas (blank areas) are PDSCH, carrying data symbols.

[0058] Similarly, based on the public network CORESET configuration, the time-frequency resource location of the downlink control signal channel PDCCH is obtained. Based on the obtained time-frequency resource location, the public search space of PDCCH is filled with data generated by AL=16 and RNTI=0xFFFF, and the user search space is filled with data randomly generated by AL=8 and RNTI, thus obtaining the final control symbol.

[0059] It should be noted that the above method of filling the PDCCH in the scenario of LTE or NR wireless communication network is only a preferred embodiment. In specific implementation, when filling the common search space of the PDCCH, data generated by AL=1, 4, 8 and RNTI as any other four-digit hexadecimal number can also be used; when filling the user search space of the PDCCH, data generated by AL=1, 4, 16 and RNTI as any four-digit hexadecimal number can also be used.

[0060] Step S102: Rotate the reference signal using the phase vector.

[0061] In practical implementation, the formula for the rotating reference signal is as follows:

[0062]

[0063] in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol. Characterize the reference signal, This represents the rotated reference signal. Specifically, when the wireless communication network is LTE, this reference signal is the Cell Reference Signal (CRS), which is a cell reference signal rotated from the phase vector; when the wireless communication network is NR, this reference signal is the Demodulation Reference Signal (DM-RS), which is a demodulation reference signal rotated from the phase vector.

[0064] Step S103: Fill in the data symbols with reference data.

[0065] In practical implementation, random data can be used to fill the data symbols of the frame structure in the above embodiments, that is, the corresponding reference data is random data. Alternatively, 0 can be used to fill the data symbols of the frame structure in the above embodiments, that is, the corresponding reference data is 0. It should be noted that using 0 to fill the data symbols can reduce the average power of the transmitted signal.

[0066] Step S104: Generate a downlink shielding signal based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal, and perform signal shielding based on the downlink shielding signal.

[0067] The control symbols obtained through the above embodiments, consisting of a reference signal after phase vector rotation and data symbols filled with reference data, combined with the master / auxiliary synchronization signals, i.e., the standard PSS / SSS synchronization signals, ultimately form a downlink shielding signal, which can be expressed as follows:

[0068]

[0069] in, Characterizing downlink shielded signal, Characterizes the master-slave synchronization signal, i.e., the standard PSS / SSS synchronization signal. Control symbols characterizing the downlink physical control channel Characterize the reference signal, Data symbols representing the downlink physical shared channel.

[0070] The generated downlink shielding signal is then transmitted through the antenna to achieve signal shielding of the shielded area.

[0071] As described in the above embodiments, the signal shielding method provided by this invention generates control symbols by filling a common search space with data generated from a first aggregation level and a first radio network temporary identifier in the downlink control channel, and filling a user search space with data generated from a second aggregation level and a second radio network temporary identifier; rotating a reference signal using a phase vector; filling data symbols with reference data; and generating a downlink shielding signal based on the control symbols, the reference signal, the data symbols, and the primary / secondary synchronization signal, thereby performing signal shielding based on the downlink shielding signal. This invention generates a shielding signal based on the wireless communication frame format, disrupting the physical layer decoding and reception process, effectively reducing the signal-to-interference-plus-noise ratio (SIR) of the communication network. Signal shielding can still be achieved even when the user terminal is in flight or normal use, effectively improving the signal shielding effect.

[0072] Through the description of the above method embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0073] This invention provides a non-volatile computer storage medium storing computer-executable instructions that can execute the signal shielding method in any of the above method embodiments.

[0074] Corresponding to the signal shielding method embodiment provided by the present invention, the present invention also provides a signal shielding device.

[0075] See Figure 5 Figure 1 is a schematic diagram of a signal shielding device provided in an embodiment of the present invention. As shown in the figure, the device includes:

[0076] The control symbol generation module 11 is used to fill the common search space with data generated by the first aggregation level and the first radio network temporary identifier in the downlink control channel, and fill the user search space with data generated by the second aggregation level and the second radio network temporary identifier to generate control symbols.

[0077] Reference signal rotation module 12 is used to rotate the reference signal by the phase vector;

[0078] Data symbol filling module 13 is used to fill data symbols with reference data;

[0079] The shielding signal generation module 14 is used to generate a downlink shielding signal based on the control symbol, the reference signal, the data symbol and the master-slave synchronization signal, so as to perform signal shielding based on the downlink shielding signal.

[0080] Optionally, the control symbol generation module 11 is further configured to: when the wireless communication network is LTE, determine the number of control symbols by the physical control format indication channel, and generate control symbols according to the number of control symbols; when the wireless communication network is NR, obtain the time-frequency resource location of the downlink control channel according to the public network CORESET configuration, and generate control symbols according to the time-frequency resource location.

[0081] Optionally, the control symbol generation module 11 fills the public search space with data generated by the first aggregation level and the first wireless network temporary identifier by filling the public search space with data generated by the first aggregation level being 16 and the first wireless network temporary identifier being 0xFFFF; the step of filling the user search space with data generated by the second aggregation level and the second wireless network temporary identifier by filling the user search space with data generated by the second aggregation level being 8 and the second wireless network temporary identifier being a random number.

[0082] Optionally, the reference signal rotation module 12 is used to rotate the cell reference signal by phase vector when the wireless communication network is LTE; and to rotate the demodulation reference signal by phase vector when the wireless communication network is NR; the formula is as follows:

[0083]

[0084] in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol; It represents the reference signal, and in LTE networks it is the cell reference signal (CRS), and in NR networks it is the demodulation reference signal (DM-RS). The reference signal is characterized after rotation.

[0085] Optionally, the data symbol filling module 13 fills the data symbols with reference data, which includes random data or 0.

[0086] Optionally, the shielding signal generation module 14 generates a downlink shielding signal based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal. The downlink shielding signal is represented as follows:

[0087]

[0088] in, Characterizing downlink shielded signal, Characterizes the master-slave synchronization signal, i.e., the standard PSS / SSS synchronization signal. Control symbols characterizing the downlink physical control channel Characterize the reference signal, Data symbols representing the downlink physical shared channel.

[0089] The above-described apparatus can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0090] The apparatus of this invention exists in various forms, including but not limited to:

[0091] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0092] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0093] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes: audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0094] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, system bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0095] (5) Other electronic devices with data interaction functions.

[0096] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0097] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for apparatus or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the description of the method embodiments. The apparatus and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0098] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A signal shielding method, characterized in that, include: In the downlink control channel, the common search space is filled with data generated by the first aggregation level and the first wireless network temporary identifier, and the user search space is filled with data generated by the second aggregation level and the second wireless network temporary identifier to generate control symbols. Rotate the reference signal by the phase vector; Fill in the data symbols using reference data; A downlink shielding signal is generated based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal, and signal shielding is performed based on the downlink shielding signal.

2. The signal shielding method according to claim 1, characterized in that, Before generating control symbols, the process also includes: when the wireless communication network is LTE, the number of control symbols is determined by the physical control format indication channel, and control symbols are generated according to the number of control symbols; when the wireless communication network is NR, the time and frequency resource location of the downlink control channel is obtained according to the public network CORESET configuration, and control symbols are generated according to the time and frequency resource location.

3. The signal shielding method according to claim 1, characterized in that, The step of filling the public search space with data generated by the first aggregation level and the first wireless network temporary identifier includes filling the public search space with data generated by the first aggregation level of 16 and the first wireless network temporary identifier of 0xFFFF. The step of filling the user search space with data generated by the second aggregation level and the second wireless network temporary identifier includes filling the user search space with data generated by the second aggregation level being 8 and the second wireless network temporary identifier being a random number.

4. The signal shielding method according to claim 1, characterized in that, The phase vector rotation reference signal includes, when the wireless communication network is LTE, phase vector rotation of the cell reference signal; when the wireless communication network is NR, phase vector rotation of the demodulation reference signal; the formula is as follows: , in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol; It represents the reference signal, and in LTE networks it is the cell reference signal (CRS), and in NR networks it is the demodulation reference signal (DM-RS). The reference signal is characterized after rotation.

5. The signal shielding method according to any one of claims 1 to 4, characterized in that, The reference data includes random data or 0.

6. The signal shielding method according to claim 1, characterized in that, A downlink masking signal is generated based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal. The downlink masking signal is represented as follows: , in, Characterizing downlink shielded signal, Characterizing the master-slave synchronization signal, Control symbols characterizing the downlink physical control channel Characterize the reference signal, Data symbols representing the downlink physical shared channel.

7. A signal shielding device, characterized in that, include: The control symbol generation module is used to fill the common search space with data generated by the first aggregation level and the first radio network temporary identifier in the downlink control channel, and fill the user search space with data generated by the second aggregation level and the second radio network temporary identifier to generate control symbols. Reference signal rotation module, used to rotate a reference signal by a phase vector; The data symbol filling module is used to fill data symbols with reference data. The shielding signal generation module is used to generate a downlink shielding signal based on the control symbol, the reference signal, the data symbol, and the master-slave synchronization signal, so as to perform signal shielding based on the downlink shielding signal.

8. The signal shielding device according to claim 7, characterized in that, The control symbol generation module is further configured to: when the wireless communication network is LTE, determine the number of control symbols by the physical control format indication channel, and generate control symbols according to the number of control symbols; when the wireless communication network is NR, obtain the time-frequency resource location of the downlink control channel according to the public network CORESET configuration, and generate control symbols according to the time-frequency resource location; the step of filling the common search space with data generated by the first aggregation level and the first wireless network temporary identifier includes filling the common search space with data generated by the first aggregation level of 16 and the first wireless network temporary identifier of 0xFFFF; The step of filling the user search space with data generated by the second aggregation level and the second wireless network temporary identifier includes filling the user search space with data generated by the second aggregation level being 8 and the second wireless network temporary identifier being a random number.

9. The signal shielding device according to claim 7, characterized in that, The reference signal rotation module is further configured to rotate the cell reference signal by phase vector when the wireless communication network is LTE; and to rotate the demodulation reference signal by phase vector when the wireless communication network is NR; the formula is as follows: , in, For phase vector, For the first The phase rotation angle of the kth subcarrier of an OFDM symbol; It represents the reference signal, and in LTE networks it is the cell reference signal (CRS), and in NR networks it is the demodulation reference signal (DM-RS). Characterizing the reference signal after rotation; The reference data used by the data symbol filling module includes random data or 0.

10. A computer-readable storage medium, characterized in that, The storage medium stores at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the steps of the signal shielding method as described in any one of claims 1 to 6.

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