PDCCH (Physical Downlink Control Channel) detection method, device, equipment, storage medium and program product

Abstract

The invention discloses a PDCCH (Physical Downlink Control Channel) detection method, device and equipment, a storage medium and a program product. In an initial access stage, a terminal receives an indication signaling sent by a network side through system information; wherein the indication signaling is used for indicating the terminal to monitor a repeatedly transmitted physical downlink control channel (PDCCH); and the terminal monitors the PDCCH which is repeatedly transmitted according to the indication signaling. By adopting the technical means provided by the invention, the PDCCH repeated transmission and detection in the initial access stage can be supported to adapt to different satellite communication scenes and channel conditions, and the coverage performance of the PDCCH is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a PDCCH detection method, device, equipment, storage medium and program product. Background Art

[0002] In the NTN (Non-Terrestrial Networks) scenario, the end-to-end link communication coverage performance is limited due to the limited satellite transmission power. According to the current link-level evaluation and simulation results, the coverage performance of PDCCH (Physical Downlink Control Channel) in the initial access process and connected state needs to be enhanced to ensure that the terminal can receive and detect the downlink control information carried by PDCCH.

[0003] One of the potential coverage enhancement solutions is to improve the downlink coverage performance of the channel through PDCCH repetition. However, in the current PDCCH repetition transmission scenario, the information such as the associated search space of PDCCH and the number of repeated PDCCH blind detection is encapsulated through RRC (Radio Resource Control) signaling configuration, which is only applicable to the connected state and cannot support PDCCH repetition transmission and PDCCH repetition blind detection in the initial access phase. Therefore, the existing technical solutions cannot effectively achieve the enhancement of PDCCH coverage performance in the initial access phase. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a PDCCH detection method, apparatus, device, storage medium and program product, which can support PDCCH repeated transmission and detection in the initial access phase to adapt to different satellite communication scenarios and channel conditions and enhance PDCCH coverage performance.

[0005] To achieve the above object, an embodiment of the present invention provides a PDCCH detection method, which is applied to a terminal side. The method includes:

[0006] Receiving an indication signaling sent by the network side; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH;

[0007] According to the indication signaling, the repeatedly transmitted PDCCH is monitored.

[0008] As a preferred implementation manner, the indication signaling is a first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in multiple time slots.

[0009] As an improvement of the above solution, the first signaling includes first information, and the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in multiple time slots.

[0010] As a preferred implementation manner, the monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes:

[0011] In response to the first information, acquiring a time interval between PDCCH monitoring windows predefined by the network side;

[0012] Determine, according to the starting time slot of the first PDCCH monitoring window and the time interval, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window;

[0013] The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

[0014] As a preferred implementation manner, the monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes:

[0015] In response to the first information, the repeatedly transmitted PDCCH is monitored in a starting time slot of a first PDCCH monitoring window and subsequent consecutive time slots.

[0016] As a preferred implementation, the first signaling further includes second information, where the second information is used to indicate an offset between PDCCH monitoring windows;

[0017] Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes:

[0018] Determine, according to the starting time slot of the first PDCCH monitoring window and the offset, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window;

[0019] The repeatedly transmitted PDCCH is detected in each time slot of the PDCCH monitoring window.

[0020] As a preferred implementation, the first signaling further includes second information, where the second information is used to indicate an index of a first parameter table; the first parameter table at least includes an offset of each PDCCH monitoring window;

[0021] Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes:

[0022] According to the index of the first parameter table, obtaining the offset of each PDCCH monitoring window, and determining the starting time slot of each PDCCH monitoring window;

[0023] The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

[0024] As a preferred implementation manner, the indication signaling is a second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in a single time slot.

[0025] As an improvement of the above solution, the second signaling includes third information, and the third information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in a single time slot.

[0026] As a preferred implementation manner, the monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes:

[0027] In response to the third information, the repeatedly transmitted PDCCH is monitored at a starting symbol of the first PDCCH and subsequent consecutive symbols.

[0028] As a preferred implementation manner, the second signaling further includes fourth information, and the fourth information is used to indicate a symbol interval of the repeatedly transmitted PDCCH;

[0029] Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes:

[0030] Determine, according to the starting symbol of the first PDCCH and the symbol interval, the starting symbol of each PDCCH after the first PDCCH;

[0031] The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

[0032] As a preferred implementation, the second signaling further includes fourth information, and the fourth information is used to indicate an index of a second parameter table; the second parameter table at least includes a starting symbol index of each PDCCH;

[0033] Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes:

[0034] Obtaining a starting symbol of each PDCCH according to an index of the second parameter table;

[0035] The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

[0036] The embodiment of the present invention further provides a PDCCH detection method, which is applied to a network side. The method includes:

[0037] Sending an indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

[0038] The embodiment of the present invention further provides a PDCCH detection device, which is applied to a terminal side, and the device includes:

[0039] An indication signaling receiving module, used to receive an indication signaling sent by a network side; wherein the indication signaling is used to instruct the terminal to monitor a repeatedly transmitted physical downlink control channel PDCCH;

[0040] The channel monitoring module is used to monitor the repeatedly transmitted PDCCH according to the indication signaling.

[0041] The embodiment of the present invention further provides a PDCCH detection device, which is applied to a network side, and the device includes:

[0042] The indication signaling sending module is used to send indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

[0043] An embodiment of the present invention further provides a PDCCH detection device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements any one of the above-described PDCCH detection methods when executing the computer program.

[0044] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute any one of the PDCCH detection methods described above.

[0045] An embodiment of the present invention further provides a computer program product, which includes a computer program or a computer instruction. When the computer program or the computer instruction is executed by a processor, the PDCCH detection method as described in any one of the above is implemented.

[0046] Compared with the prior art, the PDCCH detection method, device, equipment, storage medium and program product disclosed in the present invention, in the initial access stage, the terminal receives the indication signaling sent by the network side through system information; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH, and the terminal monitors the repeatedly transmitted PDCCH according to the indication signaling. The technical means of the present invention can support the repeated transmission and detection of PDCCH in the initial access stage to adapt to different satellite communication scenarios and channel conditions, and realize the enhancement of PDCCH coverage performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a flow chart of a PDCCH detection method provided by an embodiment of the present invention;

[0048] Figure 2 It is a schematic diagram of the principle of detecting PDCCH on multiple time slots in an embodiment of the present invention;

[0049] Figure 3 2 is a schematic diagram of the principle of detecting PDCCH in a single time slot according to an embodiment of the present invention;

[0050] Figure 4 It is a flowchart of another PDCCH detection method provided by an embodiment of the present invention;

[0051] Figure 5 It is a structural schematic diagram of a PDCCH detection device provided by an embodiment of the present invention;

[0052] Figure 6 is a structural schematic diagram of another PDCCH detection device provided by an embodiment of the present invention;

[0053] Figure 7 It is a structural schematic diagram of a PDCCH detection device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0057] It should be noted that the embodiment of the present invention is applied to a wireless communication system, and the wireless communication system includes a terminal and a network side device, and the terminal is a terminal device or a user terminal (User Equipment, UE), for example, a mobile phone, a tablet, a computer, a smart wearable device or a vehicle-mounted device, etc. The network side device can be a base station or a core network, etc., which is not specifically limited here.

[0058] In the NTN scenario, the UE needs to first determine the time-frequency resources occupied by the CORESET (Control Resource Set) and search space (SS) that encapsulate the PDCCH when performing blind detection of the PDCCH. In the initial access phase, the time-frequency resource configuration of CORESET0 is sent through the MIB (Master Information Block) information. After the UE is synchronized with the cell, it demodulates the MIB information of the cell, obtains the time-frequency resource location of CORESET0 through pdcch-ConfigSIB1, and demodulates Type0-PDCCH. In addition, MIB provides information such as SFN (System Frame Number), SCS (SCS-Subcarrier Spacing), and cell information. Combined with other information in the MIB, the UE looks up the table to determine the size of the CORESET0 time-frequency resources, the frequency domain RB offset, the starting time slot of CORESET0, and the position of the starting symbol. If SSB (Synchronization Signal Block) and CORESET0 use TDM (Time Division Multiplexing) multiplexing mode, the terminal needs to monitor Type0-PDCCH in two time slots. These two time slots are called Type0-PDCCH monitoring windows, and their starting time slot number is n0. The period of the monitoring window is equal to the SSB period. If SSB and CORESET0 use FDM (Frequency-division multiplexing), CORESET0 and SSB are in the same time slot, and the terminal determines the time domain information of CORESET0 through the time domain information of SSB.

[0059] It should be noted that CORESET solves the problem of the existence range of PDCCH, such as frequency domain and time domain resources, but the configuration of CORESET does not indicate the specific time domain position of UE to detect PDCCH. The specific time domain position of UE to detect PDCCH is given by the monitoring opportunity given by the search space. CORESET can be configured at any frequency domain position. SearchSpace solves the problem of how UE searches, and its purpose is to reduce the blind detection complexity of UE as much as possible. It can be seen that a CORESET and a search space are associated to ensure that the UE can accurately perform blind detection of PDCCH on the specified time and frequency resources. A CORESET can be bound to multiple search spaces, but a search space can only be bound to one CORESET.

[0060] During the cell synchronization phase, the UE does not receive the indexed CORESET and search space configured by RRC signaling. The terminal monitors and schedules Type 0 PDCCH of SIB1 (System Information Block 1) and needs to determine the PDCCH detection window through MIB indication information and periodically monitor the candidate PDCCH. If the network side sends multiple repeated PDCCHs, there is no relevant solution in the prior art to enable the terminal to determine whether the detected PDCCH has an associated repeated PDCCH and the accurate time domain position of the monitoring window of the repeated PDCCH, so as to obtain the performance gain of repeated detection of PDCCH.

[0061] To solve the above problems, see Figure 1 , is a flow chart of a PDCCH detection method provided by an embodiment of the present invention, and an embodiment of the present invention provides a PDCCH detection method, which is applied to a terminal side in a wireless communication system. The method comprises steps S11 to S12:

[0062] S11, receiving an indication signaling sent by the network side; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH;

[0063] S12: Monitor the repeatedly transmitted PDCCH according to the indication signaling.

[0064] In an embodiment of the present invention, a blind detection method for repeated transmission of PDCCH for scheduling SIB1 in NTN scenario is proposed, which supports repeated transmission of Type0 PDCCH and blind detection of PDCCH in the initial access phase to adapt to different satellite communication scenarios and channel conditions. In the initial access phase, before repeatedly transmitting PDCCH, the network side sends MIB information and indication signaling to the terminal side through system information, and the MIB information is used to determine the size of time-frequency domain resources occupied by CORESET0, that is, the number of time-domain symbols, the number of frequency-domain resource blocks and other information, as well as the starting time slot n0 and the starting symbol index of the monitoring window of the first PDCCH. The indication signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH. After receiving the MIB information and the indication signaling, the terminal determines the PDCCH that needs to be monitored for repeated transmission according to the indication signaling, and determines the size of the time-frequency resources and the time slot position occupied by multiple repeatedly transmitted PDCCHs after the monitoring window of the first PDCCH, so as to monitor multiple repeatedly transmitted PDCCHs on the corresponding time-frequency domain resources.

[0065] It should be noted that the first PDCCH is also the first PDCCH transmitted among the repeatedly transmitted PDCCHs. In this scheme, the repeatedly transmitted PDCCHs may carry the same control information, or may each carry a part of the control information. The terminal performs blind detection in multiple PDCCH detection windows and can decode the downlink control information carried by the PDCCH by detecting each candidate PDCCH individually or combining the control information carried by multiple PDCCHs.

[0066] By adopting the technical means of the embodiments of the present invention, based on the problem of limited PDCCH coverage performance in non-terrestrial network communications, in order to support the scheduling of PDCCH repeated transmission of SIB1 to improve coverage performance, a blind detection method for PDCCH repeated transmission of SIB1 scheduling in NTN scenarios is proposed for the current non-support of sending PDCCH repetitions by a single transmission point and the problem of time-frequency domain resource configuration occupied by PDCCH repetitions during initial access. Through flexible CORESET0 and search space0 time-frequency resource allocation and scheduling mechanism, Type0 PDCCH repeated transmission and PDCCH blind detection are supported, and PDCCH repeated transmission and detection in the initial access stage are supported to adapt to different satellite communication scenarios and channel conditions, and improve NTN downlink PDCCH coverage performance.

[0067] Based on the above embodiment, as a first preferred implementation, the indication signaling is a first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in multiple time slots. That is, in the embodiment of the present invention, the same satellite beam sends repeated PDCCHs, which are transmitted through multiple time slots in the same system frame number SFN.

[0068] Preferably, the first signaling includes at least first information, where the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in multiple time slots.

[0069] That is, the first information is used to instruct the network side to repeatedly transmit PDCCH, and to notify the terminal to monitor the repeatedly transmitted PDCCH on multiple PDCCH monitoring windows respectively. The first information can also be used to indicate the number of repetitions of the repeatedly transmitted PDCCH, and to notify the terminal to monitor the number of repetitions of the candidate PDCCH. When the number of repetitions is not indicated, the default number of repetitions is a preset value, such as 2.

[0070] See also Figure 2 , is a schematic diagram of the principle of detecting PDCCH in multiple time slots in an embodiment of the present invention. The process of blindly detecting PDCCH by the terminal is further optimized as follows.

[0071] In the first mode, the network side predefines the time interval between PDCCH monitoring windows, and the first signaling sent by the network side only includes the first information for notifying the terminal that multiple candidate PDCCHs need to be monitored. The first information can also indicate the number of PDCCH repetitions to be transmitted repeatedly through 1 bit or multiple bit fields.

[0072] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0073] In response to the first information, acquiring a time interval between PDCCH monitoring windows predefined by the network side;

[0074] Determine, according to the starting time slot of the first PDCCH monitoring window and the time interval, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window;

[0075] The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

[0076] Specifically, the terminal receives the MIB information and the first signaling sent by the network side, and determines the size of the time-frequency domain resources occupied by CORESET0, that is, the number of time-domain symbols, the number of frequency-domain resource blocks, and the starting time slot n0 and the starting symbol index of the first PDCCH monitoring window according to the MIB information. According to the first information carried in the first signaling, the terminal determines that the network side has transmitted repeated PDCCHs, and may also determine the number of repeated PDCCH transmissions according to the first information. The terminal determines the time interval n of the predefined PDCCH monitoring window according to the predefined PDCCH monitoring window. offset , determine the starting time slot of the monitoring window of the PDCCH for repeated transmission after the first PDCCH monitoring window, for example, the starting time slot of the second PDCCH monitoring window is n0+n offset , thereby performing PDCCH blind detection on the corresponding time-frequency resources and monitoring the repeatedly transmitted PDCCH.

[0077] In the second mode, the network side does not predefine the time interval between PDCCH monitoring windows, and the terminal monitors multiple repeated PDCCHs in consecutive time slots by default. Then step S12, that is, monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0078] In response to the first information, the repeatedly transmitted PDCCH is monitored in a starting time slot of a first PDCCH monitoring window and subsequent consecutive time slots.

[0079] Specifically, the terminal receives the MIB information and the first signaling sent by the network side, and determines the size of the time-frequency domain resources occupied by CORESET0, as well as the starting time slot n0 and the starting symbol index of the first PDCCH monitoring window based on the MIB information. Based on the first information carried in the first signaling, the terminal determines that the network side has transmitted repeated PDCCHs, and may also determine the number of repeated PDCCH transmissions based on the first information. The terminal monitors multiple repeatedly transmitted PDCCHs in consecutive time slots after the starting time slot of the first PDCCH monitoring window by default. Assuming that the number of repeatedly transmitted PDCCHs is N, the terminal monitors multiple candidate PDCCHs in sequence in the consecutive 2*N time slots starting from n0.

[0080] In the third mode, the network side does not predefine the time interval between PDCCH monitoring windows. The first signaling sent by the network side includes first information and second information. The first information is used to notify the terminal that it needs to monitor multiple candidate PDCCHs. The first information can also indicate the number of PDCCH repetitions for repeated transmission. The second information is used to indicate the offset n between the PDCCH monitoring windows. offset , that is, except for the first PDCCH, the interval between the starting time slot of each PDCCH monitoring window and the starting time slot of the previous PDCCH monitoring window.

[0081] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0082] Determine, according to the starting time slot of the first PDCCH monitoring window and the offset, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window;

[0083] The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

[0084] Specifically, the terminal receives the MIB information and the first signaling sent by the network side, and determines the size of the time-frequency domain resources occupied by each repeatedly transmitted PDCCH, as well as the starting time slot n0 and the starting symbol index of the first PDCCH monitoring window according to the MIB information. According to the first information carried in the first signaling, the terminal determines that the network side has transmitted repeated PDCCHs, and may also determine the number of repeated PDCCH transmissions according to the first information. According to the offset n between the PDCCH monitoring windows carried in the second information, the terminal determines that the network side has transmitted repeated PDCCHs, and may also determine the number of repeated PDCCH transmissions according to the first information. offset , determine the starting time slot of the monitoring window of the PDCCH for repeated transmission after the first PDCCH monitoring window, for example, the starting time slot of the second PDCCH monitoring window is n0+n offset , thereby performing PDCCH blind detection on the corresponding time-frequency resources and monitoring the repeatedly transmitted PDCCH.

[0085] In the fourth mode, the network side does not predefine the time interval between PDCCH monitoring windows, and the first signaling sent by the network side includes first information and second information, wherein the first information is used to notify the terminal that multiple candidate PDCCHs need to be monitored, and the first information may also indicate the number of repeated PDCCH transmissions. The second information is used to indicate an index of a first parameter table, and the first parameter table includes at least an offset of each PDCCH monitoring window.

[0086] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0087] According to the index of the first parameter table, obtaining the offset of each PDCCH monitoring window, and determining the starting time slot of each PDCCH monitoring window;

[0088] The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

[0089] Specifically, the network side determines the time domain resource size and starting position occupied by the repeated transmission PDCCH, and defines a PDCCH monitoring window time domain resource parameter table as a first parameter table. The parameter table contains multiple parameters related to the PDCCH monitoring window time domain resource configuration, including the first PDCCH detection window offset O0, the second PDCCH detection window offset O1, ..., and the starting symbol index and other information.

[0090] The network side sends a first signaling, which includes first information and second information, wherein the first information indicates that the terminal needs to monitor multiple repeated PDCCHs, and can also be used to indicate the number of repeatedly transmitted PDCCHs, and the second information is used to indicate the index of the first parameter table.

[0091] The terminal receives the MIB information and the first signaling, and determines the CORESET0 time-frequency resource size through the MIB information. The first information carried by the first signaling determines that the PDCCH to be repeatedly transmitted is to be monitored within multiple PDCCH monitoring windows, and the first parameter table is queried based on the index indicated by the second information, so as to determine the starting time slot and starting symbol index of each PDCCH monitoring window. The starting time slot of the first PDCCH monitoring window is obtained by calculating n0 through the following formula, and the starting time slot of the second PDCCH monitoring window is obtained by calculating n1 through the following formula, and so on.

[0092]

[0093] Where μ is the subcarrier spacing configuration, i is the index of the SSB, and M is the overlap factor. is the number of time slots in a frame.

[0094] Taking the repetition number N=2 as an example, the first parameter representation of 2 PDCCH repetition transmissions is shown in Table 1:

[0095] Table 1

[0096]

[0097] In the above scheme, the first signaling can also be carried in the MIB information. For the fourth method, the first parameter table index is indicated by reusing the information of the searchSpaceZero field in the MIB. The terminal side needs to first determine the PDCCH for repeated transmission to be monitored in multiple PDCCH monitoring windows based on the first information, and then query the first parameter table based on the information of the searchSpaceZero field to determine the starting time slot and starting symbol index of each PDCCH monitoring window.

[0098] By adopting the technical means of the embodiment of the present invention, a coverage enhancement scheme supporting PDCCH repetition can be implemented, and PDCCHs with repeated transmissions can be monitored in multiple time slots. According to the first signaling sent by the network side, the terminal can accurately obtain the size and position of the time-frequency domain resources occupied by the PDCCH repetition, as well as the number of repeated transmissions and other information, so as to perform PDCCH blind detection on the corresponding time-frequency resources to improve the signal-to-noise ratio or coding gain.

[0099] Based on the above embodiment, as a second preferred implementation, the indication signaling is a second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in a single time slot. That is, in the embodiment of the present invention, a coverage enhancement scheme for multiple PDCCH repetition transmissions within a time slot is supported to achieve symbol-level (intra-slot) PDCCH repetition transmission.

[0100] Preferably, the second signaling includes third information, and the third information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in a single time slot.

[0101] That is, the third information is used to instruct the network side to repeatedly transmit PDCCH, and to notify the terminal to monitor the repeatedly transmitted PDCCH separately in a single time slot. The third information can also be used to indicate the number of repetitions of the repeatedly transmitted PDCCH, and to notify the terminal to monitor the number of repetitions of the candidate PDCCH. When the number of repetitions is not indicated, the default number of repetitions is a preset value, such as 2.

[0102] See also Figure 3 , is a schematic diagram of the principle of detecting PDCCH in a single time slot in an embodiment of the present invention. The process of blindly detecting PDCCH by the terminal is further optimized as follows.

[0103] In the first manner, the second signaling sent by the network side includes only the third information, and the terminal is defaulted to monitor multiple repeatedly transmitted PDCCHs over multiple consecutive symbols.

[0104] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0105] In response to the third information, the repeatedly transmitted PDCCH is monitored at a starting symbol of the first PDCCH and subsequent consecutive symbols.

[0106] Specifically, the terminal receives the MIB information and the second signaling sent by the network side, and determines the number of symbols and the starting time slot occupied by CORESET0 and the starting symbol index of the first PDCCH according to the MIB information. According to the third information carried in the second signaling, the terminal determines that the network side has transmitted repeated PDCCHs, and determines the number of repeated transmissions of the PDCCH according to the third information. Based on the starting symbol index of the first PDCCH, the terminal monitors multiple repeatedly transmitted PDCCHs on the starting symbol of the first PDCCH and multiple consecutive symbols thereafter by default.

[0107] In the second mode, the second signaling sent by the network side includes third information and fourth information, wherein the third information is used to notify the terminal that it needs to monitor multiple candidate PDCCHs, and the third information may also indicate the number of repetitions of the repeatedly transmitted PDCCHs. The fourth information is used to indicate the symbol interval of the repeatedly transmitted PDCCHs.

[0108] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0109] Determine, according to the starting symbol of the first PDCCH and the symbol interval, the starting symbol of each PDCCH after the first PDCCH;

[0110] The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

[0111] Specifically, the terminal receives the MIB information and the second signaling sent by the network side, and determines the number of symbols and the starting time slot occupied by CORESET0 and the starting symbol index of the first PDCCH according to the MIB information. According to the third information carried in the second signaling, the terminal determines that the network side has transmitted repeated PDCCHs, and may also determine the number of repeated transmissions of PDCCHs according to the third information; according to the fourth information, the terminal determines the starting symbol index of each candidate PDCCH based on the symbol interval indicated by the fourth information, and monitors multiple repeatedly transmitted candidate PDCCHs on the corresponding time domain resources.

[0112] In the third mode, the second signaling sent by the network side includes third information and fourth information, the third information is used to notify the terminal that it needs to monitor multiple candidate PDCCHs, and the third information may also indicate the number of PDCCH repetitions for repeated transmission. The fourth information is used to indicate the index of the second parameter table, and the second parameter table includes at least the starting symbol index of each PDCCH.

[0113] Then step S12, i.e., monitoring the repeatedly transmitted PDCCH according to the indication signaling, includes:

[0114] Obtaining a starting symbol of each PDCCH according to an index of the second parameter table;

[0115] The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

[0116] Specifically, the network side defines a parameter table related to the time domain resources of the PDCCH monitoring window as the second parameter table. The parameter table contains information such as the offset O for determining the starting time slot of the PDCCH detection window and the starting symbol index parameter. The starting symbol index is indicated in a combination of the starting symbol indexes of multiple PDCCHs.

[0117] The second signaling indicated by the network side carries third information and fourth information. The third information is used to notify the terminal to perform blind detection on the repeatedly transmitted PDCCH, and can also indicate the number of PDCCH repetitions. The fourth information is used to indicate the index of the second parameter table.

[0118] The terminal receives the MIB information and the second signaling, determines the candidate PDCCH that needs to be monitored for repeated transmission according to the third information carried by the second signaling, and determines the size of the time-frequency resources occupied by each PDCCH according to the MIB information. According to the index indicated by the fourth information carried by the second signaling, the second parameter table is queried to determine the starting time slot of the PDCCH monitoring window and the starting symbol index of each PDCCH, so as to perform PDCCH blind detection at the location of the corresponding time-frequency domain resources. The second parameter table is shown in Table 2 for example:

[0119] Table 2

[0120]

[0121] In the above scheme, the second signaling can also be carried in the MIB information. For the third method, the second parameter table index is indicated by multiplexing the information of the searchSpaceZero field in the MIB. The terminal side needs to first determine to monitor the PDCCH repetition in multiple PDCCH monitoring windows according to the third information, and then query the second parameter table according to the information of the searchSpaceZero field to determine the starting time slot and starting symbol index of each PDCCH monitoring window. When the number of PDCCH repetitions is large, the network side needs to avoid overlapping symbols with CORESET0 corresponding to other SSB indexes through time-frequency resource scheduling. For example, when indicating the parameter table index of the starting time domain position of CORESET0, avoid CORESET0 corresponding to different SSB indexes occupying repeated time slot resources. Among them, the third method determines the starting symbol index of each PDCCH repetition by configuring the parameter table, which is more flexible than the resource allocation method of the fixed symbol interval of the first method, and because each PDCCH starting symbol index is independently configured, it is conducive to supporting the situation where CORESET0 time slot resources corresponding to different SSB indexes are repeated.

[0122] By adopting the technical means of the embodiments of the present invention, a coverage enhancement scheme supporting PDCCH repetition can be implemented, and the PDCCH of repeated transmission can be monitored on multiple symbols of a single time slot. According to the second signaling sent by the network side, the terminal can accurately obtain the size and position of the time-frequency domain resources occupied by the PDCCH repetition, as well as the number of repeated transmissions and other information, so as to perform PDCCH blind detection on the corresponding time-frequency resources to improve the signal-to-noise ratio or coding gain.

[0123] See also Figure 4 , is a flow chart of another PDCCH detection method provided by an embodiment of the present invention. The embodiment of the present invention also provides another PDCCH detection method, which is applied to the network side. The method includes step S21:

[0124] S21. Send an indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

[0125] In a preferred implementation manner, the indication signaling is a first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in multiple time slots.

[0126] The first signaling includes first information, where the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in multiple time slots.

[0127] Optionally, the first signaling is used to trigger the terminal to obtain the time interval between the PDCCH monitoring windows predefined on the network side, determine the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window according to the starting time slot of the first PDCCH monitoring window and the time interval, and monitor the repeatedly transmitted PDCCH in the time slot of each PDCCH monitoring window; or, monitor the repeatedly transmitted PDCCH in the starting time slot of the first PDCCH monitoring window and the consecutive time slots thereafter.

[0128] Alternatively, the first signaling further includes second information, and the second information is used to indicate the offset between PDCCH monitoring windows. Then the first signaling is used to trigger the terminal to determine the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window according to the starting time slot of the first PDCCH monitoring window and the offset, and detect the repeatedly transmitted PDCCH in the time slot of each PDCCH monitoring window.

[0129] Alternatively, the second information is used to indicate an index of a first parameter table, and the first parameter table at least includes an offset of each PDCCH monitoring window. Then the first signaling is used to trigger the terminal to obtain the offset of each PDCCH monitoring window according to the index of the first parameter table, determine the starting time slot of each PDCCH monitoring window, and monitor the repeatedly transmitted PDCCH in the time slot of each PDCCH monitoring window.

[0130] In another preferred implementation manner, the indication signaling is a second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in a single time slot.

[0131] The second signaling includes third information, where the third information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in a single time slot.

[0132] Optionally, the second signaling is used to trigger the terminal to monitor the repeatedly transmitted PDCCH at the starting symbol of the first PDCCH and subsequent consecutive symbols.

[0133] Alternatively, the second signaling further includes fourth information, and the fourth information is used to indicate the symbol interval of the repeatedly transmitted PDCCH. Then the second signaling is used to instruct the terminal to determine the starting symbol of each PDCCH after the first PDCCH according to the starting symbol of the first PDCCH and the symbol interval, and monitor the repeatedly transmitted PDCCH according to the starting symbol of each PDCCH.

[0134] Alternatively, the second signaling further includes fourth information, and the fourth information is used to indicate an index of a second parameter table; the second parameter table at least includes a starting symbol index of each PDCCH. Then the second signaling is used to trigger the terminal to obtain a starting symbol of each PDCCH according to the index of the second parameter table, and monitor the repeatedly transmitted PDCCH according to the starting symbol of each PDCCH.

[0135] It should be noted that the PDCCH detection method applied to the network side provided in the embodiment of the present invention corresponds one to one with all the process steps of the PDCCH detection method applied to the terminal side in the above embodiment, and the working principles and beneficial effects of the two are the same, so they will not be repeated.

[0136] See also Figure 5 , is a schematic diagram of the structure of a PDCCH detection device provided by an embodiment of the present invention. The embodiment of the present invention further provides a PDCCH detection device 30, which is applied to a terminal side. The device 30 includes:

[0137] The indication signaling receiving module 31 is used to receive the indication signaling sent by the network side; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH;

[0138] The channel monitoring module 32 is used to monitor the repeatedly transmitted PDCCH according to the indication signaling.

[0139] It should be noted that the PDCCH detection device applied to the terminal side provided in an embodiment of the present invention is used to execute all the process steps of the PDCCH detection method applied to the terminal side in the above embodiment. The working principles and beneficial effects of the two correspond one to one, and thus will not be repeated.

[0140] See also Figure 6 , is a schematic diagram of the structure of another PDCCH detection device provided by an embodiment of the present invention. The embodiment of the present invention also provides another PDCCH detection device 40, which is applied to the network side. The device 40 includes:

[0141] The indication signaling sending module 41 is used to send indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

[0142] It should be noted that the PDCCH detection device applied to the network side provided in an embodiment of the present invention is used to execute all the process steps of the PDCCH detection method applied to the network side in the above embodiment. The working principles and beneficial effects of the two correspond one to one, and thus will not be described in detail.

[0143] See also Figure 7, is a structural diagram of a PDCCH detection device provided in an embodiment of the present invention. The embodiment of the present invention also provides a PDCCH detection device 50, including a processor 51, a memory 52, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the PDCCH detection method described in any one of the above embodiments is implemented.

[0144] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the PDCCH detection method as described in any one of the above embodiments.

[0145] An embodiment of the present invention further provides a computer program product, which includes a computer program or a computer instruction. When the computer program or the computer instruction is executed by a processor, the PDCCH detection method as described in any one of the above embodiments is implemented.

[0146] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0147] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A PDCCH detection method, characterized in that: Applied to the terminal side, the method includes: Receiving an indication signaling sent by the network side; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH; According to the indication signaling, the repeatedly transmitted PDCCH is monitored.

2. The PDCCH detection method according to claim 1, characterized in that: The indication signaling is a first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in multiple time slots.

3. The PDCCH detection method according to claim 2, characterized in that: The first signaling includes first information, where the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in multiple time slots.

4. The PDCCH detection method according to claim 3, characterized in that: The monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes: In response to the first information, acquiring a time interval between PDCCH monitoring windows predefined by the network side; Determine, according to the starting time slot of the first PDCCH monitoring window and the time interval, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window; The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

5. The PDCCH detection method according to claim 3, characterized in that: The monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes: In response to the first information, the repeatedly transmitted PDCCH is monitored in a starting time slot of a first PDCCH monitoring window and subsequent consecutive time slots.

6. The PDCCH detection method according to claim 3, characterized in that: The first signaling further includes second information, where the second information is used to indicate an offset between PDCCH monitoring windows; Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes: Determine, according to the starting time slot of the first PDCCH monitoring window and the offset, the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window; The repeatedly transmitted PDCCH is detected in each time slot of the PDCCH monitoring window.

7. The PDCCH detection method according to claim 3, characterized in that: The first signaling further includes second information, where the second information is used to indicate an index of the first parameter table; The first parameter table includes at least an offset of each PDCCH monitoring window; Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes: According to the index of the first parameter table, obtaining the offset of each PDCCH monitoring window, and determining the starting time slot of each PDCCH monitoring window; The repeatedly transmitted PDCCH is monitored in each time slot of the PDCCH monitoring window.

8. The PDCCH detection method according to claim 1, characterized in that: The indication signaling is a second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH in a single time slot.

9. The PDCCH detection method according to claim 8, characterized in that: The second signaling includes third information, where the third information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH and / or the number of repetitions of the PDCCH in a single time slot.

10. The PDCCH detection method according to claim 9, characterized in that: The monitoring of the repeatedly transmitted PDCCH according to the indication signaling includes: In response to the third information, the repeatedly transmitted PDCCH is monitored at a starting symbol of the first PDCCH and subsequent consecutive symbols.

11. The PDCCH detection method according to claim 9, characterized in that: The second signaling further includes fourth information, where the fourth information is used to indicate a symbol interval of the repeatedly transmitted PDCCH; Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes: Determine, according to the starting symbol of the first PDCCH and the symbol interval, the starting symbol of each PDCCH after the first PDCCH; The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

12. The PDCCH detection method according to claim 9, characterized in that: The second signaling further includes fourth information, where the fourth information is used to indicate an index of the second parameter table; The second parameter table includes at least a starting symbol index of each PDCCH; Then, monitoring the repeatedly transmitted PDCCH according to the indication signaling includes: Obtaining a starting symbol of each PDCCH according to an index of the second parameter table; The repeatedly transmitted PDCCH is monitored according to a starting symbol of each of the PDCCHs.

13. A PDCCH detection method, characterized in that: Applied to the network side, the method includes: Sending an indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

14. A PDCCH detection device, characterized in that: Applied to the terminal side, the device includes: An indication signaling receiving module, used to receive an indication signaling sent by a network side; wherein the indication signaling is used to instruct the terminal to monitor a repeatedly transmitted physical downlink control channel PDCCH; The channel monitoring module is used to monitor the repeatedly transmitted PDCCH according to the indication signaling.

15. A PDCCH detection device, characterized in that: Applied to the network side, the device includes: The indication signaling sending module is used to send indication signaling to the terminal; wherein the indication signaling is used to instruct the terminal to monitor the repeatedly transmitted physical downlink control channel PDCCH.

16. A PDCCH detection device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the PDCCH detection method according to any one of claims 1 to 13 when executing the computer program.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the PDCCH detection method according to any one of claims 1 to 13.

18. A computer program product, characterized in that The computer program product comprises a computer program or a computer instruction, and when the computer program or the computer instruction is executed by a processor, the PDCCH detection method according to any one of claims 1 to 13 is implemented.

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