Signal shielding method, signal shielding system and storage medium

Abstract

The embodiment of the invention provides a signal shielding method, a signal shielding system and a storage medium. The method comprises the steps that the signal shielding system receives a first signal sent by a base station; determining first configuration information corresponding to the first channel time-frequency resource and second configuration information corresponding to the second channel time-frequency resource based on the first signal; wherein the first channel is a type 1-PDCCH (Physical Downlink Control Channel), and the second channel is a candidate PDCCH on the first channel; and generating a shielding signal through the first configuration information and the second configuration information, and performing signal shielding processing based on the shielding signal.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a signal shielding method, a signal shielding system and a storage medium. Background Art

[0002] With the continuous development of communication technology, communication signals cover almost every area of ​​life. For some specific places, there is a need to shield communication signals, such as various examination rooms, courts, etc. Signal shielding equipment is usually set up in places where signals need to be shielded to block the normal communication of the communication network in a specific area. Traditional mobile phone signal shielding technology uses high-power full-band scanning or pseudo base stations to achieve the purpose of shielding. Common jammers shield mobile phone signals by transmitting interference signals. By transmitting high-power signals that scan the full frequency band, the surrounding electromagnetic environment is severely damaged, and the mobile phone cannot normally obtain and parse the signal from the base station, thereby achieving the purpose of shielding mobile phone signals. The second is the pseudo base station mode. When this jammer is running, the user's mobile phone signal can be forced to connect to the device, so that it cannot be connected to the public mobile communication network.

[0003] However, the analog shielding method using high-power full-band scanning has problems such as high power consumption, difficulty in shielding, and interference with base stations. And the method using pseudo base stations has problems such as complex system volume and high implementation cost. In summary, the main problems of using traditional shielding methods to shield mobile phone signals are high power consumption, difficulty in shielding, and interference with base stations, which in turn leads to reduced system performance. Summary of the invention

[0004] The embodiments of the present application provide a signal shielding method, a signal shielding system and a storage medium, which can reduce the transmission power of the shielding signal and reduce the difficulty of shielding without causing interference to the base station, thereby improving system performance.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a signal shielding method, the method comprising:

[0007] receiving a first signal sent by a base station;

[0008] Determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-PDCCH, and the second channel is a candidate PDCCH on the first channel;

[0009] A shielding signal is generated by using the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

[0010] In a second aspect, an embodiment of the present application provides a signal shielding system, the signal shielding system comprising: a receiving unit, a determining unit, and a generating unit;

[0011] The receiving unit is used to receive a first signal sent by a base station;

[0012] The determining unit is configured to determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-PDCCH, and the second channel is a candidate PDCCH on the first channel;

[0013] The generating unit is used to generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

[0014] In a third aspect, an embodiment of the present application provides a signal shielding system, the signal shielding system comprising: a processor and a memory; wherein:

[0015] The memory is used to store a computer program that can be run on the processor;

[0016] The processor is used to execute the signal shielding method as described above when running the computer program.

[0017] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a computer program code is stored on the storage medium, and when the computer program code is executed by a computer, the signal shielding method as described above is implemented.

[0018] The embodiment of the present application provides a signal shielding method, a signal shielding system and a storage medium, the method comprising: a signal shielding system receives a first signal sent by a base station; based on the first signal, determines the first configuration information corresponding to the time-frequency resource of the first channel and the second configuration information corresponding to the time-frequency resource of the second channel; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; generates a shielding signal through the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. It can be seen that the signal shielding system can determine the first configuration information corresponding to the time-frequency resource of type1-PDCCH, and can further determine the second configuration information corresponding to the time-frequency resource of the candidate PDCCH, and then can generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. In other words, the present application can generate a corresponding shielding signal based on the first configuration information and the second configuration information, and compared with the high-power full-band shielding method, it can reduce the transmission power of the shielding signal and reduce the shielding difficulty, thereby improving the performance of the system. At the same time, since only the downlink PDCCH channel is shielded, it will not affect the transmission of the uplink signal, so it will not interfere with the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a signal shielding method proposed in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a SIB1 message example proposed in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the distribution of PDCCH candidates proposed in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of shielding a target CCE proposed in an embodiment of the present application;

[0023] Figure 5 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 1 ;

[0024] Figure 6 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 2 ;

[0025] Figure 7 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 3 ;

[0026] Figure 8 A schematic diagram of the overall solution process proposed for the embodiment of the present application;

[0027] Fig. 9 Schematic diagram of the structure of the signal shielding system proposed in the embodiment of the present application Figure 1 ;

[0028] Fig.10 Schematic diagram of the structure of the signal shielding system proposed in the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. It is understood that the specific embodiments described herein are only used to explain the related applications, rather than to limit the applications. It should also be noted that, for ease of description, only the parts related to the related applications are shown in the drawings.

[0030] With the continuous development of communication technology, communication signals cover almost every area of ​​life. There is a need to shield communication signals in some specific places, such as various examination rooms, courts, hospitals, military bases, etc. Signal shielding equipment is usually set up in places where signal shielding is required to block the normal communication of the communication network in a specific area.

[0031] Traditional mobile phone signal shielding technology uses high-power full-band scanning or pseudo base stations to achieve the purpose of shielding. Common shielding devices shield mobile phone signals by transmitting interference signals. By transmitting high-power signals that scan the full frequency band, the surrounding electromagnetic environment is severely damaged, and the mobile phone cannot normally obtain and analyze the signal from the base station, thereby achieving the purpose of shielding the mobile phone signal. The second is the pseudo base station mode. When this shielding device is running, the user's mobile phone signal can be forced to connect to the device, so that it cannot connect to the public mobile communication network.

[0032] The disadvantages of the analog shielding method using high-power full-band scanning are: first, high power consumption, high radiation, and great harm to humans and animals; second, the carrier bandwidth in 5G is large, and it is difficult to shield using traditional shielding methods; third, it will interfere with the base station. As for the method of using pseudo base stations, the system is complex and large in size, the implementation cost is high, and it is not convenient for use in some places.

[0033] In order to solve the current problems of high power consumption, high shielding difficulty, and interference to the base station, which in turn leads to a decrease in system performance, the embodiment of the present application provides a signal shielding method, a signal shielding system and a storage medium, the method comprising: a signal shielding system receives a first signal sent by a base station; based on the first signal, determines the first configuration information corresponding to the time-frequency resource of the first channel and the second configuration information corresponding to the time-frequency resource of the second channel; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; generates a shielding signal through the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. It can be seen that the signal shielding system can determine the first configuration information corresponding to the time-frequency resource of type1-PDCCH, and can further determine the second configuration information corresponding to the time-frequency resource of the candidate PDCCH, and then can generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. In other words, the present application can generate a corresponding shielding signal based on the first configuration information and the second configuration information, which can reduce the transmission power of the shielding signal and reduce the shielding difficulty compared to the high-power full-band shielding method, thereby improving the performance of the system. At the same time, since only the downlink PDCCH channel is shielded, it will not affect the transmission of uplink signals and will not cause interference to the base station.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0035] Embodiment 1

[0036] The present application embodiment provides a signal shielding method. Figure 1 Schematic diagram of the signal shielding method proposed in the embodiment of the present application, such as Figure 1 As shown, the method for signal shielding by the signal shielding system may include the following steps:

[0037] Step 101: Receive a first signal sent by a base station.

[0038] In an embodiment of the present application, the signal shielding system may receive a first signal sent by a base station.

[0039] It should be noted that, in the embodiments of the present application, the first signal may be a system message sent by a base station, and the present application does not specifically limit the information content included in the first signal.

[0040] Step 102: determine first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource based on the first signal; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel.

[0041] In an embodiment of the present application, after receiving the first signal sent by the base station, the signal shielding system can determine the first configuration information corresponding to the first channel time-frequency resources and the second configuration information corresponding to the second channel time-frequency resources based on the first signal; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel.

[0042] It should be noted that in an embodiment of the present application, after receiving the first signal sent by the base station, the signal shielding system can parse the first signal and determine the first channel through the random access radio network temporary identifier (RA-RNTI) in the first signal; then, the first configuration parameter of the first control resource set of the first channel can be determined, and the second configuration parameter of the search space can be determined at the same time; and then, the first configuration information can be determined based on the first configuration parameter and the second configuration parameter.

[0043] It should be noted that in the embodiments of the present application, since the carrier bandwidth in the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) system is too large, the 5G standard introduces the concept of partial bandwidth (Bandwidth Part, BWP), that is, different sizes of BWP can be allocated according to different services. In the 5G system, the network side will configure multiple control resource sets (Control Resource Set, CORESET) and search spaces (SearchSpace) in the BWP, and then determine the time-frequency resources of the PDCCH by pairing a CORESET with a SearchSpace.

[0044] It should be noted that in an embodiment of the present application, the first control resource set may be CORESET#0. According to the definition of TS38.213, the control resource set associated with type1-pdcch in 5G is CORESET#0.

[0045] Further, in an embodiment of the present application, the signal shielding system may determine the first configuration parameter of the first control resource set of the first channel by parsing a Master Information Block (MIB) in the first signal.

[0046] It should be noted that, in the embodiments of the present application, the MIB information may include frequency, subcarrier spacing and pdcch_ConfigSib1 information, and the present application does not specifically limit the type and quantity of parameters included in the MIB information.

[0047] Furthermore, in an embodiment of the present application, the shielding system obtains the subcarrier spacing of the synchronization signal and PBCH block (SynchronizationSignal and PBCH block, SSB) and PDCCH by parsing the MIB and system information block type 1 (System information block 1, SIB1) in the first signal. When the subcarrier spacing (Subcarrier Spacing, SCS) of the SSB and PDCCH is 30kHz, the first configuration parameters of the first control resource set (CORESET#0) can be obtained by looking up Table 1 in the high 4 bits of pdcch_ConfigSib1 in the MIB. Table 1 is shown below.

[0048] Table 1

[0049]

[0050] Among them, Number of RBs means that CORESET contains Resource Blocks (RBs), Number of Symbols indicates that CORESET contains symbols, Offset is the number of RBs between the index of the smallest RB of CORESET and the index of the smallest CRB that overlaps with the first RB of SSB, and SS / PBCH block and CORESET multiplexing pattern indicates the multiplexing method of SSB and CORESET#0.

[0051] It should be noted that in an embodiment of the present application, Table 1 is a CORESET#0 configuration lookup table when the subcarrier spacing of SSB and PDCCH is 30khz and the minimum channel bandwidth is 5 or 10Mhz. The shielding system can determine the first configuration parameters of the first control resource set (CORESET#0) through Table 1, for example, the number of RBs occupied by CORESET#0 in the frequency domain, the number of OFDM symbols occupied in the time domain, and the frequency offset. The present application does not specifically limit the parameter type and quantity included in the first configuration parameters.

[0052] It should be noted that, in the embodiment of the present application, the shielding system can determine the first configuration parameters of the first control resource set (CORESET#0), and can also determine the second configuration parameters of the search space.

[0053] It should be noted that in an embodiment of the present application, when determining the second configuration parameters of the search space, the shielding system can parse the SIB1 message in the first signal; then, the monitoring time slot of the PDCCH in the search space can be determined based on the first field information in the SIB1 message; the target time in the monitoring time slot can be determined based on the second field information in the SIB1 message; and the second configuration parameters can be determined based on the monitoring time slot and the target time.

[0054] For example, in the embodiments of the present application, Figure 2 This is a schematic diagram of a SIB1 message example proposed in an embodiment of the present application, such as Figure 2 As shown, in order to affect the UE blind detection DCI and interfere with the user terminal (User ELquipmen, UE) receiving MSG2 during the initial access process, the shielding system also needs to determine the Search space configuration information related to RA-RNTI. In the SIB1 message, the Search space configuration information related to type1-PDCCH is defined, such as Figure 2 As shown, the ID of the Search space associated with RA-RNTI is 1, and SIB1 also configures the Common Search Space (CSS) with ID 1; wherein, the first field information (monitoringSlotPeriodicityAndOffset=sl1) indicates that each time slot is a time to monitor the PDCCH in the type1-PDCCH CSS, and the second field information (monitoringSymbolsWithinSlot=100000000000000) indicates that the UE needs to monitor the first OFDM symbol (target time) in each time slot. In summary, the shielding system can determine the time slot to be monitored and the monitoring time (target time) of the PDCCH in the monitoring time slot.

[0055] That is to say, in an embodiment of the present application, after determining the first configuration parameter of the first control resource set of the first channel and determining the second configuration parameter of the search space, the shielding system can determine the first configuration information based on the first configuration parameter and the second configuration parameter, that is, it can determine the resource configuration status of the first control resource set (CORESET#0).

[0056] Furthermore, in an embodiment of the present application, the shielding system may also determine second configuration information corresponding to the time-frequency resources of the second channel based on the first signal; wherein the second channel is a candidate PDCCH on the first channel.

[0057] It should be noted that in an embodiment of the present application, during the random access process, after the base station (eNB) side receives the initial direct transfer message (message1, MSG1), it sends a random access response (Random Access Response, RAR) generated at the MAC layer on the downlink shared channel (Downlink Shared CHannel, DL-SCH). When responding to the random access request, the eNB side processes based on a downlink control information (Downlink Control Information, DCI) format on the PDCCH, and also adds the RA-RNTI identifier in the process. The receiving UE knows the time-frequency position of the preamble code transmission, so it knows the RA-RNTI. After determining the physical resource CORESET configuration and search space configuration of the PDCCH channel, the UE will search according to the RA-RNTI in the common search space (Common Search Space, CSS). The process of the UE searching for PDCCH on the CORESET is called blind detection. If the UE blindly detects the DCI corresponding to the RA-RNTI, it means that the access request is responded to, and then the UE reads the RAR on the PDSCH according to the instruction of the DCI message on the PDCCH. All PDCCHs that may carry DCI are called candidate PDCCHs (PDCCHcandidate). Before performing blind detection, the UE must first determine the time-frequency resource configuration of all PDCCH candidates in the search space. The shielding system also needs to determine the time-frequency distribution of all PDCCH candidates. To achieve this goal, the shielding system can determine which control channel elements (Channel Control Element, CCE) each PDCCH candidate needs to occupy, and by determining the mapping relationship between CCE and REG, since REG directly corresponds to RE, the shielding system can know which time-frequency resources each second channel (PDCCH candidate) occupies, that is, it can determine the second configuration information.

[0058] It should be noted that in an embodiment of the present application, when determining the second configuration information corresponding to the second channel time-frequency resources, the shielding system can first determine the target control channel element (Channel Control Element, CCE) occupied by the second channel; then it can determine the mapping relationship between CCE and resource element group (Resource Element Group, REG); and then it can determine the second configuration information based on the mapping relationship between CCE and REG.

[0059] It should be noted that in an embodiment of the present application, when determining the target CCE occupied by the second channel, the shielding system can determine the target CCE occupied by the second channel based on the aggregation level, the number of candidate PDCCHs corresponding to the aggregation level, the starting position of the candidate PDCCH in the search space, the number of CCEs in the second control resource set, and the address information corresponding to the candidate PDCCH.

[0060] Exemplarily, in an embodiment of the present application, for a search space S associated with CORESET, The PDCCH candidate address for aggregation level L is The calculation formula of the starting CCE position is as follows. By using formula (1), the masking system can determine which CCEs are occupied by each PDCCH candidate, that is, it can determine the target CCE occupied by the second channel (PDCCH candidate).

[0061]

[0062] Among them, the aggregation level L, the number of CCEs in CORESET, the number of PDCCH candidates corresponding to the aggregation level L, and the address information of the PDCCH candidates can all be obtained from the MIB and SIB1 system messages. The other values ​​in the formula are default values, as shown in Table 2 below.

[0063] Table 2

[0064]

[0065]

[0066] It should be noted that, in the embodiments of the present application, Figure 3 This is a schematic diagram of the distribution of PDCCH candidates proposed in the embodiment of the present application, such as Figure 3 As shown, according to the parameter meanings and parameter values ​​in Table 2, the shielding system calculates through the formula that there are 4 PDCCH candidates when the aggregation level L is 4, there are 2 PDCCH candidates when the aggregation level L is 8, and the number of PDCCH candidates when the aggregation level L is 16 is 1.

[0067] Furthermore, in an embodiment of the present application, when determining the mapping relationship between CCE and REG, the shielding system may determine the mapping relationship between CCE and REG based on a centralized mapping method; and / or determine the mapping relationship between CCE and REG based on a distributed mapping method, and then determine the second configuration information based on the mapping relationship between CCE and REG.

[0068] It should be noted that in the embodiment of the present application, in CORESET#0, the NR system adopts distributed mapping based on REG groups, according to the in-row interleaving, and the size of the REG group is 6 REGs, and the number of interleaver rows is 2, all of which are default parameters. The cyclic shift parameters of the interleaving unit can be obtained through the MIB message. The total number of REG groups is obtained by the first configuration parameter of the first control resource set (CORESET#0).

[0069] Exemplarily, in an embodiment of the present application, the following Table 3 shows an example of an interleaver when the total number of REG groups is 8, the number of interleaver rows is 2, and the cyclic shift is 6. For the interleaver shown in Table 3, the REG group number occupied by CCE0 is 2, the REG group number occupied by CCE1 is 6, and the REG group number occupied by CCE2 is 3. REGs are sorted in the time domain first and then in the frequency domain, and REGs also form different REG groups in sequence according to the sequence number.

[0070] Table 3

[0071] 2 3 0 1 6 7 4 5

[0072] Step 103: Generate a shielding signal through the first configuration information and the second configuration information to perform signal shielding processing based on the shielding signal.

[0073] In an embodiment of the present application, after the signal shielding system determines the first configuration information corresponding to the first channel time-frequency resources and the second configuration information corresponding to the second channel time-frequency resources based on the first signal, it can generate a shielding signal through the first configuration information and the second configuration information to perform signal shielding processing based on the shielding signal.

[0074] It should be noted that, in the embodiment of the present application, the signal shielding system can determine the transmission time slot corresponding to the shielding signal; and determine the frequency domain resources occupied by the shielding signal.

[0075] It should be noted that, in the embodiment of the present application, the shielding system may determine the sending time slot corresponding to the shielding signal based on the monitoring time slot and the target opportunity in the second configuration parameter.

[0076] For example, in the embodiment of the present application, the occurrence of PDCCH monitoring opportunities has a periodic characteristic, such as Figure 2 As shown, the monitoring opportunity occurs on the first OFDM symbol of each time slot (target opportunity). Therefore, after constructing a shielding frame, the shielding system can periodically send the constructed shielding frame without configuration update, that is, the present application can send a shielding signal in each PDCCH monitoring opportunity (target opportunity).

[0077] It should be noted that in the embodiment of the present application, the shielding system does not need to monitor the uplink channel in the time domain, and only needs to send a shielding signal in each PDCCH monitoring opportunity (target opportunity), so it will not cause interference to the base station.

[0078] It should be noted that, in an embodiment of the present application, the shielding system may shield all channels corresponding to the first control resource set based on the first configuration parameter to determine the frequency domain resources occupied by the shielding signal.

[0079] It should be noted that in the embodiments of the present application, due to the CORESET mechanism set in 5G, if all type1-PDCCH channels are directly shielded, the bandwidth occupied by the shielded signal is the bandwidth occupied by CORESET#0. Since each frequency band has 4 BWPs, each BWP can be configured with 3 CORESETs, and a total of 12 CORESETs can be configured. It can be seen that the bandwidth occupied by CORESET#0 is greatly reduced compared with the bandwidth of the frequency band of dozens or hundreds of M. Therefore, all type1-PDCCH channels can be directly shielded.

[0080] It should be noted that in the embodiment of the present application, the shielding system directly shields all type1-PDCCH channels. Compared with full-band shielding, the transmission power of the shielding signal can be reduced, thereby reducing power consumption and electromagnetic interference.

[0081] Furthermore, in an embodiment of the present application, when determining the shielding signal, the shielding system can also determine the target CCE occupied by the second channel; if the target CCE meets the first preset condition, the target CCE occupied by the second channel is shielded to determine the frequency domain resources occupied by the shielding signal.

[0082] It should be noted that, in the embodiments of the present application, the target CCE may be the CCE occupied by PDCCH candidates of different aggregation levels that need to be shielded by the shielding system, and the present application does not specifically limit the number of target CCEs.

[0083] It should be noted that in an embodiment of the present application, the first preset condition may be a condition for shielding the target CCE, for example, the number of target CCEs accounts for half of the number of CCEs occupied by PDCCH candidates of different aggregation levels. The present application does not specifically limit the condition for shielding the target CCE.

[0084] For example, in the embodiments of the present application, Figure 4 This is a schematic diagram of shielding target CCE proposed in an embodiment of the present application, such as Figure 4As shown in FIG. 1 , assuming that the demodulation and decoding of the interference UE during blind detection only needs to shield the signal on half of the CCE to interfere with the UE's blind detection of DCI, the shielding system can use the above mechanism to reduce the number of CCEs shielded in the frequency domain, for example, Figure 4 As shown, the shielding system can choose to shield CCEs with shielding numbers (0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25). At this time, for PDCCH candidates of different aggregation levels, half of their occupied CCEs (target CCEs) are shielded. No matter which aggregation level the base station chooses to transmit DCI, the UE will fail blind detection. Other shielding schemes can also be used here, as long as the proportion of PDCCH candidates of different aggregation levels that are shielded is more than half.

[0085] It should be noted that in the embodiments of the present application, since the starting CCE numbers of PDCCH candidates with the same address but different aggregation levels are the same in the CSS of type1-PDCCH (first channel), the CCEs occupied by PDCCH candidates with different aggregation levels are partially overlapped. Interference with these overlapping CCEs can minimize the number of CCEs shielded in the frequency domain while ensuring that UE blind detection fails and shielding is successful.

[0086] Furthermore, in an embodiment of the present application, when determining the shielding signal, the shielding system can also determine the quality of the second channel and the correspondence between the target channel corresponding to the shielding target aggregation level; then, based on the correspondence, the target channel corresponding to the target aggregation level can be shielded to determine the frequency domain resources occupied by the shielding signal.

[0087] It should be noted that in an embodiment of the present application, when the shielding system determines the correspondence between the quality of the second channel and the target channel corresponding to the shielded target aggregation level, it can determine the correspondence between the quality of the second channel and the target channel corresponding to the shielded first aggregation level when the quality of the second channel meets the second preset condition; and determine the correspondence between the quality of the second channel and the target channel corresponding to the shielded second aggregation level when the quality of the second channel meets the third preset condition.

[0088] It should be noted that, in the embodiments of the present application, the second preset condition may be a condition that the quality of the second channel is better, and the third preset condition may be a condition that the quality of the second channel is worse. The present application does not specifically limit the quality judgment standard of the second channel.

[0089] For example, in the embodiments of the present application, Figure 5 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 1 ,like Figure 5 As shown, when the downlink channel condition is known to be good, the shielding system can shield the CCEs occupied by the PDCCH candidates with a lower aggregation level (first aggregation level). On the contrary, if the downlink channel condition is poor, the shielding unit only needs to shield the PDCCH candidates with a higher aggregation level (second aggregation level). For example, Figure 3 The CCE occupancy of the PDCCH candidate is shown. When the downlink channel condition is good, the shielding system will shield the PDCCH candidates with aggregation levels 4 and 8 (first aggregation level). Conversely, when the downlink channel condition is poor, the shielding system will shield the PDCCH candidates with aggregation levels 8 and 16 (second aggregation level).

[0090] It should be noted that, in the embodiments of the present application, Figure 6 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 2 ,like Figure 6 As shown, when the channel quality is good, compared with directly shielding all type1-PDCCH channels, the shielding system does not need to shield CCE12-15, CCE28-CCE31; when the channel condition is poor. Figure 7 The adaptive CCE control mechanism proposed in this embodiment of the application is shown in FIG. Figure 3 ,like Figure 7 As shown, compared with directly shielding all type1-PDCCH channels, the shielding system does not need to shield CCE24-CCE31. In summary, the shielding system reduces the bandwidth of the shielding signal to a certain extent, thereby reducing the shielding difficulty.

[0091] That is to say, in an embodiment of the present application, when the shielding system constructs a shielding signal in the frequency domain, it can directly shield all type1-PDCCH channels. Compared with the shielding of the entire frequency band, the transmission power of the shielding signal can be reduced, thereby reducing power consumption; the shielding system can also shield the target CCE occupied by PDCCH candidates of different aggregation levels, thereby minimizing the number of CCEs shielded in the frequency domain. Furthermore, the shielding system can also determine the quality of the second channel and the correspondence between the target channel corresponding to the shielded target aggregation level; and then the target channel corresponding to the target aggregation level can be shielded based on the correspondence.

[0092] Furthermore, in an embodiment of the present application, the shielding system can also combine the two schemes when constructing the shielding signal. On the one hand, the aggregation level of the PDCCH candidate to be shielded can be selected according to the channel conditions, and at the same time, the target CCE occupied by PDCCH candidates of different aggregation levels can be shielded, thereby further reducing the bandwidth of the shielding signal, thereby reducing the difficulty of shielding.

[0093] In summary, after the shielding system determines the first configuration information corresponding to the first channel time-frequency resource and the second configuration information corresponding to the second channel time-frequency resource based on the first signal, it can generate a shielding signal through the first configuration information and the second configuration information. When generating the shielding signal, the present application can construct the shielding signal in the frequency domain based on three methods: (1) All type1-PDCCH channels can be directly shielded, which can reduce the transmission power of the shielding signal compared to the shielding of the full frequency band; (2) The shielding system can shield the target CCE occupied by PDCCH candidates of different aggregation levels, thereby minimizing the number of CCEs shielded in the frequency domain; (3) The shielding system can determine the quality of the second channel and the corresponding relationship between the target channel corresponding to the shielding target aggregation level; and then the target channel corresponding to the target aggregation level can be shielded based on the corresponding relationship. In addition, the present application can send a shielding signal in each PDCCH monitoring opportunity (target opportunity). The shielding system does not need to monitor the uplink channel in the time domain, but only needs to send a shielding signal in each PDCCH monitoring opportunity (target opportunity), so it will not cause interference to the base station.

[0094] The embodiment of the present application provides a signal shielding method, which includes: a signal shielding system receives a first signal sent by a base station; based on the first signal, determines the first configuration information corresponding to the time-frequency resource of the first channel and the second configuration information corresponding to the time-frequency resource of the second channel; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; generates a shielding signal through the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. It can be seen that the signal shielding system can determine the first configuration information corresponding to the time-frequency resource of type1-PDCCH, and can further determine the second configuration information corresponding to the time-frequency resource of the candidate PDCCH, and then can generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. In other words, the present application can generate a corresponding shielding signal based on the first configuration information and the second configuration information, and compared with the high-power full-band shielding method, it can reduce the transmission power of the shielding signal and reduce the shielding difficulty, thereby improving the performance of the system. At the same time, since only the downlink PDCCH channel is shielded, it will not affect the transmission of the uplink signal, so it will not interfere with the base station.

[0095] Embodiment 2

[0096] Based on the above embodiments, another embodiment of the present application provides a signal shielding method. In order to achieve the effect of shielding 5G signals, the shielding system of the present application interferes with the PDCCH channel to shield the DCI signaling that needs to be parsed when receiving the RAR signal during the random access process. Figure 8 The overall solution flow diagram proposed in this application embodiment is as follows: Figure 8 As shown, the main process includes: (1) the shielding system receives the system frame and parses the system message to determine the time-frequency resources of the type1-PDCCH channel (first channel) corresponding to the RA-RNTI (random access radio network temporary identifier); (2) the time-frequency resources occupied by each PDCCH candidate (second channel) are further determined according to the system message; (3) the shielding signal generating unit constructs the shielding signal from the time domain and the frequency domain respectively, and after the construction is completed, the shielding signal transmitting unit transmits the shielding signal in the shielding time slot.

[0097] It should be noted that, in an embodiment of the present application, the shielding system can determine the time-frequency resource configuration (first configuration information) of the type1-PDCCH channel. The present application implements the shielding of 5G signals mainly based on the interference with the DCI transmission on the PDCCH channel. Specifically, the main interference is the DCI responsible for RAR scheduling carried in the PDCCH. At this time, the PDCCH type for transmission scheduling RAR is type1-PDCCH (first channel). Since the carrier bandwidth is too large in the 5G system, the 5G standard introduces the concept of BWP, and BWPs of different sizes can be allocated according to different services. In the 5G system, the network side will configure multiple CORESETs and SearchSpaces in the BWP, and then determine the time-frequency resources (first configuration information) of the downlink control channel PDCCH by pairing a CORESET with a SearchSpace.

[0098] It should be noted that in the embodiment of the present application, according to the definition of TS38.213, the control resource set associated with type1-pdcch in 5G is CORESET#0, whose time-frequency configuration is determined by MIB, and the relevant configuration of the search space is given by SIB1. Therefore, in order to determine the time-frequency resources (first configuration information) of the type1-PDCCH channel, it is necessary to first parse the relevant system message and determine CORESET#0 (first control resource set) and the search space configuration of type1-PDCCH.

[0099] Further, in an embodiment of the present application, the shielding system may determine the resource configuration status (first configuration parameter) of CORESET#0 (first control resource set) through MIB.

[0100] Exemplarily, in an embodiment of the present application, during the initial cell search process, the UE can obtain MIB information through PBCH, including information such as frequency, subcarrier spacing and pdcch_ConfigSib1. When the SCS (subcarrier spacing) of SSB and PDCCH are both 30kHz, the specific CORESET#0 configuration can be obtained by looking up Table 1 in the upper 4 bits of pdcch_ConfigSib1 in MIB. Table 1 shows the time-frequency resource configuration of CORESET#0 for a frequency band with a minimum channel bandwidth of 5MHz or 10MHz, when the SCS of {SS / PBCH block, PDCCH} is {30, 30}kHz, that is, the CORESET#0 configuration lookup table when the subcarrier spacing of SSB and PDCCH is 30khz and the minimum channel bandwidth is 5 or 10Mhz. Therefore, in the time slot of the receiving system frame, the shielding system needs to parse the MIB and SIB1 messages according to the received base station signal, obtain the subcarrier spacing of SSB and PDCCH, and obtain the frequency band information at the same time, and obtain the minimum channel bandwidth information according to the relevant lookup table. Combining the above information and the high 4 bits in pdcch_ConfigSib1, the system can obtain the number of RBs occupied by CORESET#0 in the frequency domain, the number of OFDM symbols occupied in the time domain, and the frequency offset to determine the configuration of the time and frequency resources of CORESET#0 (the first control resource set) (the first configuration parameter).

[0101] Further, in an embodiment of the present application, the shielding system can determine the RA-RNTI-related Search space configuration information (second configuration parameter). After determining the configuration of the CORESET#0 time-frequency resources (first configuration parameter), in order to affect the UE blind detection DCI and interfere with the UE's reception of MSG2 during the initial access process, the shielding system also needs to determine the RA-RNTI-related Search space configuration information (second configuration parameter).

[0102] It should be noted that, in the embodiment of the present application, in the SIB1 message, Search space configuration information (second configuration parameter) related to type1-PDCCH is defined, such as Figure 2As shown, the ID of the Search space related to RA-RNTI is 1, and SIB1 also configures the CSS with ID 1; wherein monitoringSlotPeriodicityAndOffset=sl1 (first field information), which means that each time slot is the time to monitor the PDCCH in the type1-PDCCH CSS. monitoringSymbolsWithinSlot=100000000000000 (second field information) means that the UE needs to monitor the first OFDM symbol in each time slot. In short, the shielding system obtains the time slot to be monitored and the monitoring timing (target timing) of the PDCCH in the monitoring time slot through the monitoringSlotPeriodicityAndOffset and monitoringSymbolsWithinSlot fields in the SIB1 message. In summary, after receiving the base station frame parsing system message, the shielding system can obtain the time-frequency resource distribution (first configuration information) of type1-pdcch and clarify the timing for the UE to monitor the PDCCH.

[0103] That is to say, in an embodiment of the present application, after determining the first configuration parameter of the first control resource set of the first channel and determining the second configuration parameter of the search space, the shielding system can determine the first configuration information based on the first configuration parameter and the second configuration parameter, that is, it can determine the resource configuration status of the first control resource set (CORESET#0).

[0104] Furthermore, in an embodiment of the present application, the shielding system may also determine second configuration information corresponding to the time-frequency resources of the second channel based on the first signal; wherein the second channel is a candidate PDCCH on the first channel.

[0105] It should be noted that in an embodiment of the present application, the shielding system can determine the time-frequency resources (second configuration information) occupied by each candidate PDCCH, and the random access process is performed before the attachment process, etc., for the UE to establish a wireless link with the eNB and obtain / restore uplink synchronization. In the random access process (here mainly four-step random access is taken as an example, and the two-step random access is the same), after the eNB side receives MSG1, it sends a random access response RAR generated in the MAC layer on the DL-SCH. When responding to the random access request, the eNB side processes based on a DCI format on the PDCCH, and the RA-RNTI identifier is also added in the process. The receiving UE knows the time-frequency position of the preamble code transmission, so it knows the RA-RNTI. After determining the physical resource CORESET configuration and search space configuration of the PDCCH channel, the UE will search according to the RA-RNTI in the CSS. The process of the UE searching for PDCCH on the CORESET is called blind detection. If the UE blindly detects the DCI corresponding to the RA-RNTI, it means that the access request is responded to, and then the UE reads the RAR on the PDSCH according to the instruction of the DCI message on the PDCCH. All PDCCHs that may carry DCI are called candidate PDCCHs (PDCCHcandidate). Before performing blind detection, the UE must first determine the time-frequency resource configuration of all PDCCH candidates in the search space. The shielding system also needs to determine the time-frequency distribution of all PDCCH candidates. To achieve this goal, the shielding system can determine which CCEs each PDCCH candidate needs to occupy, and by determining the mapping relationship between CCE and REG, since REG directly corresponds to RE, the shielding system can know which time-frequency resources each PDCCH candidate (second channel) occupies, that is, it can determine the second configuration information.

[0106] It should be noted that in an embodiment of the present application, the shielding system can determine the mapping relationship between CCE and REG. Before analyzing the time-frequency distribution of the PDCCH candidate, the shielding system needs to determine the mapping relationship between the control channel element CCE and the resource unit group REG. One REG consists of 12 consecutive REs on an OFDM symbol, that is, one PRB on an OFDM symbol. CCE is a logical resource unit for determining the search space and the allocation of PDCCH candidate resources. One CCE consists of 6 REGs. For the mapping of CCE to REG, the NR protocol supports two methods: centralized mapping and distributed mapping. In CORESET#0, the NR system adopts distributed mapping based on REG groups, interleaving in rows, and the size of the REG group is 6 REGs, and the number of interleaver rows is 2, all of which are default parameters. The cyclic shift parameter of the interleaving unit is obtained through the physical cell ID, and this information can be obtained through the MIB message. The total number of REG groups is obtained from the CORESET#0 configuration message. The shielding system can also obtain the time-frequency resources occupied by CCEs with different sequence numbers.

[0107] It should be noted that, in the embodiment of the present application, as shown in Table 3 above, an example of an interleaver is given when the total number of REG groups is 8, the number of interleaver rows is 2, and the cyclic shift is 6. According to the interleaver in Table 3, the REG group number occupied by CCE0 is 2, the REG group number occupied by CCE1 is 6, and the REG group number occupied by CCE2 is 3. REGs are sorted in the time domain first and then in the frequency domain, and REGs also constitute different REG groups in sequence according to the sequence number.

[0108] Further, in the embodiment of the present application, the shielding system can determine the time-frequency resource configuration of the PDCCH candidate. After analyzing the time-frequency resource occupancy of different CCEs, in order to determine which time-frequency resources the PDCCH candidate specifically occupies, the shielding system also needs to know which CCEs (target CCEs) are occupied by each PDCCH candidate. The PDCCH candidate address for aggregation level L is The calculation formula for the starting CCE position is shown in the above formula (1); wherein, the aggregation level L, the number of CCEs in CORESET, the number of PDCCH candidates corresponding to the aggregation level L, and the address information of the PDCCH candidate can all be obtained from the MIB and SIB1 system messages. The other values ​​in the formula are default values, as shown in Table 2 above. Through the above formula (1), the shielding system can know which CCEs (target CCEs) are occupied by each PDCCH candidate (second channel).

[0109] Furthermore, in an embodiment of the present application, a shielding system can construct a shielding signal. In order to smoothly determine the shielding signal sending time slot, the shielding system needs to first achieve time synchronization with the base station. In order to achieve synchronization between the base station and the shielding system, the base station signal is periodically received at the remote end, and the synchronization signal is transmitted to the shielding system through optical fiber to achieve time synchronization with the base station. After synchronization is achieved, the shielding system does not need to monitor the uplink channel in the time domain, but only needs to send a shielding signal in each known PDCCH monitoring opportunity (target opportunity). Since the PDCCH monitoring duration accounts for a very small proportion of the entire system frame, the actual working duration of the shielding system to transmit the shielding signal is short. At the same time, this shielding method will not interfere with the uplink channel and affect the normal operation of the base station. The occurrence of PDCCH monitoring opportunities is periodic, such as Figure 2 In the example, the monitoring opportunity occurs at the first OFDM symbol of each time slot (target opportunity). Therefore, after the shielding signal generating unit constructs a shielding frame, the shielding system can periodically send the constructed shielding frame without configuration update.

[0110] It should be noted that in the embodiment of the present application, the shielding system does not need to monitor the uplink channel in the time domain, and only needs to send a shielding signal in each PDCCH monitoring opportunity (target opportunity), so it will not cause interference to the base station.

[0111] Furthermore, in an embodiment of the present application, the shielding system can determine the frequency domain resources occupied by the shielding signal. The shielding system has determined the time-frequency resources occupied by type1-PDCCH, the CCE occupancy of all PDCCH candidates, and the mapping relationship between CCE and REG groups. The present application believes that in the frequency domain, the shielding system has three schemes for constructing the shielding signal. For the convenience of analysis and examples, a distribution of PDCCH candidates is given, such as Figure 3 As shown:

[0112] It should be noted that, in the embodiment of the present application, the shielding system adopts the scheme 1 when constructing the shielding signal: directly shielding all type1-PDCCH channels. Due to the CORESET mechanism set in 5G, if all type1-PDCCH channels are directly shielded, the bandwidth occupied by the shielding signal is the bandwidth occupied by CORESET#0. Since each frequency band has 4 BWPs, a total of 12 CORESETs can be configured. Therefore, the bandwidth occupied by CORESET#0 is greatly reduced compared with the bandwidth of the frequency band, which is tens or hundreds of M. Therefore, all type1-PDCCH channels can be directly shielded.

[0113] It should be noted that in the embodiment of the present application, the shielding system directly shields all type1-PDCCH channels. Compared with full-band shielding, the transmission power of the shielding signal can be reduced, thereby reducing power consumption and electromagnetic interference.

[0114] Furthermore, in an embodiment of the present application, the shielding system adopts the second scheme when constructing the shielding signal: using the PDCCH candidate mechanism to shield part of the PDCCH channels. In order to further reduce the transmission power of the shielding signal and reduce the shielded resource blocks in the frequency domain, scheme 2 proposes the PDCCH candidate mechanism to shield part of the PDCCH channels. For the DCI that carries RAR scheduling information, its physical layer adopts a fixed coding and modulation method. For the convenience of discussion, it is assumed that in order to interfere with the demodulation and decoding of the UE's blind detection, it is only necessary to shield the signal on half of the CCE to interfere with the UE's blind detection of the DCI. The shielding system can use the above mechanism to reduce the number of CCEs shielded in the frequency domain. Figure 4 As shown in the figure, in order to minimize the number of CCEs masked in the frequency domain, a possible solution is that the masking system can select the CCEs (target CCEs) with masking numbers (0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25). At this time, for PDCCH candidates of different aggregation levels, half of the CCEs (target CCEs) occupied by them are masked. No matter what aggregation level the base station chooses for DCI transmission, the UE will fail blind detection. Of course, there are many masking solutions, as long as the proportion of PDCCH candidates of different aggregation levels being masked is more than half.

[0115] It should be noted that, in the embodiments of the present application, the core idea of ​​scheme 2 is that in the CSS of type1-PDCCH, the starting CCE numbers of PDCCH candidates with the same address but different aggregation levels are the same. Therefore, for PDCCH candidates with different aggregation levels, the CCEs they occupy are partially overlapped. Interference with these overlapping CCEs can minimize the number of CCEs shielded in the frequency domain while ensuring that UE blind detection fails and shielding is successful.

[0116] Furthermore, in the embodiment of the present application, the shielding system adopts a third scheme when constructing a shielding signal: shielding part of the PDCCH channel by using an adaptive CCE control mechanism. Figure 5As shown in the figure, in order to effectively improve the PDCCH control channel scheduling efficiency, save CCE scheduling resources, and avoid the problem of insufficient scheduling, the base station adopts adaptive CCE control based on the channel quality of different users to ensure the reasonable allocation of CCE resources. A low-aggregation resource allocation method is used for near-point users, and a high-aggregation method is used for medium and far points, which saves resources while ensuring the terminal demodulation capability.

[0117] It should be noted that, in the embodiments of the present application, Scheme 3 utilizes the adaptive CCE control mechanism to shield some PDCCH channels. According to the above mechanism, the shielding system can monitor the downlink channel conditions (the quality of the second channel) in real time, and inform the shielding signal generating unit in real time. When the shielding signal generating unit knows that the downlink channel (the quality of the second channel) is in good condition, it only needs to shield the CCE occupied by the PDCCH candidates with a lower aggregation level (the first aggregation level). Conversely, if the downlink channel (the quality of the second channel) is in poor condition, the shielding unit only needs to shield the PDCCH candidates with a higher aggregation level (the second aggregation level). The relationship between the aggregation level of the PDCCH candidate to be shielded and the downlink channel is obtained in the form of a lookup table, including but not limited to. For Figure 3 The CCE occupancy of the PDCCH candidates shown in the figure shows that when the downlink channel conditions are good, the shielding system will shield the PDCCH candidates with aggregation levels of 4 and 8 (the first aggregation level). On the contrary, when the downlink channel conditions are poor, the shielding system will shield the PDCCH candidates with aggregation levels of 8 and 16 (the second aggregation level). Figure 6 As shown in Figure 2, when the channel conditions are good, compared with solution 1, the shielding system does not need to shield CCE12-15, CCE28-CCE31; when the channel conditions are poor, such as Figure 7 As shown, compared with Solution 1, the shielding system does not need to shield CCE24-CCE31. In summary, Solution 3 reduces the bandwidth of the shielding signal to a certain extent, thereby reducing the difficulty of shielding.

[0118] Furthermore, in an embodiment of the present application, the shielding system can also combine the two schemes when constructing the shielding signal. On the one hand, the aggregation level of the PDCCH candidate to be shielded can be selected according to the channel conditions (Scheme 3), and at the same time, the target CCE occupied by PDCCH candidates of different aggregation levels can be shielded (Scheme 2), thereby further reducing the bandwidth of the shielding signal, thereby reducing the difficulty of shielding.

[0119] That is to say, in an embodiment of the present application, when the shielding system constructs a shielding signal in the frequency domain, it can directly shield all type1-PDCCH channels. Compared with full-band shielding, the transmission power of the shielding signal can be reduced, thereby reducing power consumption; the shielding system can also shield the target CCE occupied by PDCCH candidates of different aggregation levels, thereby minimizing the number of CCEs shielded in the frequency domain. Furthermore, the shielding system can also determine the quality of the second channel and the correspondence between the target channel corresponding to the shielding target aggregation level; then the target channel corresponding to the target aggregation level can be shielded based on the correspondence. In addition, the present application can also combine the two schemes to construct a shielding signal, and can combine the above-mentioned scheme two and the above-mentioned scheme three, that is, the aggregation level of the PDCCH candidate to be shielded can be selected according to the channel conditions, and at the same time, the target CCE occupied by PDCCH candidates of different aggregation levels can be shielded, and the bandwidth of the shielding signal can be further reduced, thereby reducing the difficulty of shielding.

[0120] In summary, after the shielding system determines the first configuration information corresponding to the first channel time-frequency resource and the second configuration information corresponding to the second channel time-frequency resource based on the first signal, it can generate a shielding signal through the first configuration information and the second configuration information. When generating the shielding signal, the present application can construct the shielding signal in the frequency domain based on three methods: (1) All type1-PDCCH channels can be directly shielded, which can reduce the transmission power of the shielding signal compared to the shielding of the full frequency band; (2) The shielding system can shield the target CCE occupied by PDCCH candidates of different aggregation levels, thereby minimizing the number of CCEs shielded in the frequency domain; (3) The shielding system can determine the quality of the second channel and the corresponding relationship between the target channel corresponding to the shielding target aggregation level; and then the target channel corresponding to the target aggregation level can be shielded based on the corresponding relationship. In addition, the present application can send a shielding signal in each PDCCH monitoring opportunity (target opportunity). The shielding system does not need to monitor the uplink channel in the time domain, but only needs to send a shielding signal in each PDCCH monitoring opportunity (target opportunity), so it will not cause interference to the base station.

[0121] The embodiment of the present application provides a signal shielding method, which includes: a signal shielding system receives a first signal sent by a base station; based on the first signal, determines the first configuration information corresponding to the time-frequency resource of the first channel and the second configuration information corresponding to the time-frequency resource of the second channel; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; generates a shielding signal through the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. It can be seen that the signal shielding system can determine the first configuration information corresponding to the time-frequency resource of type1-PDCCH, and can further determine the second configuration information corresponding to the time-frequency resource of the candidate PDCCH, and then can generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. In other words, the present application can generate a corresponding shielding signal based on the first configuration information and the second configuration information, and compared with the high-power full-band shielding method, it can reduce the transmission power of the shielding signal and reduce the shielding difficulty, thereby improving the performance of the system. At the same time, since only the downlink PDCCH channel is shielded, it will not affect the transmission of the uplink signal, so it will not interfere with the base station.

[0122] Embodiment 3

[0123] Based on the above embodiments, the present application provides a signal shielding system. Fig. 9 Schematic diagram of the signal shielding system Figure 1 ,like Fig. 9 As shown, the signal shielding system 10 includes: a receiving unit 11, a determining unit 12 and a generating unit 13;

[0124] The receiving unit 11 is used to receive a first signal sent by a base station;

[0125] The determining unit 12 is configured to determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-PDCCH, and the second channel is a candidate PDCCH on the first channel;

[0126] The generating unit 13 is configured to generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

[0127] In the embodiments of the present application, further, Fig.10 Schematic diagram of the signal shielding system Figure 2 ,like Fig.10As shown, the signal shielding system 10 proposed in the embodiment of the present application may also include a processor 14, a memory 15 storing executable instructions of the processor 14, and further, the signal shielding system 10 may also include a communication interface 16, and a bus 17 for connecting the processor 14, the memory 15 and the communication interface 16.

[0128] In the embodiment of the present application, the processor 14 can be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller, and a microprocessor. It can be understood that for different devices, the electronic device used to implement the function of the processor can also be other, and the embodiment of the present application is not specifically limited. The signal shielding system 10 can also include a memory 15, which can be connected to the processor 14, wherein the memory 15 is used to store executable program code, the program code includes computer operation instructions, and the memory 15 may include a high-speed RAM memory, and may also include a non-volatile memory, for example, at least two disk memories.

[0129] In the embodiment of the present application, the bus 17 is used to connect the communication interface 16, the processor 14 and the memory 15, and the mutual communication between these devices.

[0130] In the embodiment of the present application, the memory 15 is used to store instructions and data.

[0131] Furthermore, in an embodiment of the present application, the above-mentioned processor 14 is used to receive a first signal sent by a base station; determine first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource based on the first signal; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; and generate a shielding signal through the first configuration information and the second configuration information to perform signal shielding processing based on the shielding signal.

[0132] In practical applications, the memory 15 may be a volatile memory, such as a random access memory (RAM); or a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk (HDD) or a solid-state drive (SSD); or a combination of the above types of memory, and provide instructions and data to the processor 14.

[0133] The embodiment of the present application provides a signal shielding system, which receives a first signal sent by a base station; determines the first configuration information corresponding to the time-frequency resource of the first channel and the second configuration information corresponding to the time-frequency resource of the second channel based on the first signal; wherein the first channel is type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; generates a shielding signal through the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. It can be seen that the signal shielding system can determine the first configuration information corresponding to the time-frequency resource of type1-PDCCH, and can further determine the second configuration information corresponding to the time-frequency resource of the candidate PDCCH, and then can generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal. In other words, the present application can generate a corresponding shielding signal based on the first configuration information and the second configuration information, and compared with the high-power full-band shielding method, it can reduce the transmission power of the shielding signal and reduce the shielding difficulty, thereby improving the performance of the system. At the same time, since only the downlink PDCCH channel is shielded, it will not affect the transmission of the uplink signal, so it will not interfere with the base station.

[0134] An embodiment of the present application provides a computer-readable storage medium having a program stored thereon, and when the program is executed by a processor, the signal shielding method as described above is implemented.

[0135] Specifically, the program instructions corresponding to a signal shielding method in this embodiment can be stored on a storage medium such as a CD, a hard disk, a USB flash drive, etc. When the program instructions corresponding to a signal shielding method in the storage medium are read or executed by an electronic device, the following steps are included:

[0136] receiving a first signal sent by a base station;

[0137] Determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-PDCCH, and the second channel is a candidate PDCCH on the first channel;

[0138] A shielding signal is generated by using the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

[0139] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0140] The present application is described with reference to implementation flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0141] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which is implemented in the implementation flow diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing the steps in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0143] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A signal shielding method, It is characterized in that The method comprises: receiving a first signal sent by a base station; Determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-physical downlink control channel PDCCH, and the second channel is a candidate PDCCH on the first channel; A shielding signal is generated by using the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

2. The method according to claim 1, It is characterized in that After receiving the first signal sent by the base station, the method further includes: parsing the first signal, and determining the first channel through a random access wireless network temporary identifier in the first signal; Determine a first configuration parameter of a first control resource set of the first channel, and simultaneously determine a second configuration parameter of a search space; The first configuration information is determined based on the first configuration parameter and the second configuration parameter.

3. The method according to claim 2, It is characterized in that The determining of the second configuration parameter of the search space comprises: Parsing a system information block type 1 SIB1 message in the first signal; Determine a monitoring time slot of the PDCCH in the search space based on the first field information in the SIB1 message; Determine a target timing in the monitoring time slot based on the second field information in the SIB1 message; The second configuration parameter is determined based on the listening time slot and the target opportunity.

4. The method according to claim 3, It is characterized in that The method further comprises: Determine a target control channel element CCE occupied by the second channel; Determine a mapping relationship between the CCE and the resource element group REG; The second configuration information is determined based on a mapping relationship between the CCE and the REG.

5. The method according to claim 4, It is characterized in that The determining a target CCE occupied by the second channel includes: The target CCE occupied by the second channel is determined based on the aggregation level, the number of second channels corresponding to the aggregation level, the starting position of the second channel in the search space, the number of CCEs in the second control resource set, and the address information corresponding to the second channel.

6. The method according to claim 5, It is characterized in that The method further comprises: Determine a transmission time slot corresponding to the shielding signal; The frequency domain resources occupied by the shielding signal are determined.

7. The method according to claim 6, It is characterized in that The method further comprises: The transmission time slot is determined based on the listening time slot and the target opportunity in the second configuration parameter.

8. The method according to claim 6, It is characterized in that The determining the frequency domain resources occupied by the shielding signal includes: All channels corresponding to the first control resource set are shielded based on the first configuration parameter to determine the frequency domain resources occupied by the shielded signal.

9. The method according to claim 6, It is characterized in that The determining the frequency domain resources occupied by the shielding signal includes: Determining the target CCE occupied by the second channel; If the target CCE meets the first preset condition, a shielding process is performed on the target CCE occupied by the second channel to determine the frequency domain resources occupied by the shielding signal.

10. The method according to claim 8, It is characterized in that The determining the frequency domain resources occupied by the shielding signal includes: Determine a correspondence between the quality of the second channel and a target channel corresponding to the shielding target aggregation level; The target channel corresponding to the target aggregation level is shielded based on the corresponding relationship to determine the frequency domain resources occupied by the shielded signal.

11. The method according to claim 9, It is characterized in that The determining of the quality of the second channel and the corresponding relationship between the target channel corresponding to the shielding target aggregation level include: When the quality of the second channel satisfies a second preset condition, determining a corresponding relationship between the quality of the second channel and shielding a target channel corresponding to the first aggregation level; In a case where the quality of the second channel satisfies a third preset condition, a corresponding relationship between the quality of the second channel and a target channel corresponding to shielding the second aggregation level is determined.

12. A signal shielding system, It is characterized in that The signal shielding system comprises: a receiving unit, a determining unit and a generating unit; The receiving unit is used to receive a first signal sent by a base station; The determining unit is configured to determine, based on the first signal, first configuration information corresponding to a first channel time-frequency resource and second configuration information corresponding to a second channel time-frequency resource; wherein the first channel is a type1-PDCCH, and the second channel is a candidate PDCCH on the first channel; The generating unit is used to generate a shielding signal according to the first configuration information and the second configuration information, so as to perform signal shielding processing based on the shielding signal.

13. A signal shielding system, It is characterized in that The signal shielding system comprises: a processor and a memory; wherein, The memory is used to store a computer program that can be run on the processor; The processor is configured to execute the method according to any one of claims 1 to 10 when running the computer program.

14. A computer-readable storage medium, It is characterized in that The storage medium stores computer program codes, and when the computer program codes are executed by a computer, the method according to any one of claims 1 to 10 is executed.

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