Pdcch detection method, apparatus and device, and storage medium and program product

Abstract

Provided in the present disclosure are a PDCCH detection method, apparatus and device, and a storage medium and a program product. In an initial access stage, a terminal receives instruction signaling sent by a network side by means of system information, wherein the instruction signaling is used for instructing the terminal to monitor a physical downlink control channel PDCCH repetition; and the terminal monitors the PDCCH repetition on the basis of the instruction signaling.

Description

A PDCCH detection method, device, apparatus, storage medium and program product

[0001] Cross-reference to Related Applications

[0002] The present disclosure claims priority from Chinese Patent Application No. 202411326317.4 filed on September 23, 2024 in China, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of wireless communication, and particularly relates to a PDCCH detection method, device, apparatus, storage medium and program product. BACKGROUND

[0004] In a non-terrestrial network (NTN) scenario, due to the limited transmission power of a satellite, the end-to-end link communication coverage performance is limited. According to the current link-level evaluation and simulation results, the coverage performance of a physical downlink control channel (PDCCH) in an initial access process and a connected state needs to be enhanced to ensure that a terminal can receive and detect downlink control information carried by the PDCCH.

[0005] One of the potential coverage enhancement schemes is to improve the downlink coverage performance of a channel through PDCCH repetition. However, in the current PDCCH repetition scenario, the information such as an associated search space of the PDCCH and a blind detection number of the repeated PDCCH is configured through radio resource control (RRC) signaling, which is only applicable to the connected state and cannot support PDCCH repetition and PDCCH repetition blind detection in the initial access stage. Therefore, the related technical scheme cannot well implement the PDCCH coverage performance enhancement in the initial access stage. SUMMARY

[0006] An object of embodiments of the present disclosure is to provide a PDCCH detection method, device, apparatus, storage medium and program product, which can support PDCCH repetition and detection in the initial access stage to adapt to different satellite communication scenarios and channel conditions and implement PDCCH coverage performance enhancement.

[0007] To achieve the above object, embodiments of the present disclosure provide a PDCCH detection method applied to a terminal side, and the method comprises the following steps.

[0008] receive indication signaling sent by a network side; wherein the indication signaling is used to instruct a terminal to monitor a physical downlink control channel (PDCCH) with repetition transmission;

[0009] monitor the PDCCH with repetition transmission according to the indication signaling.

[0010] As an optional implementation, the indication signaling is first signaling sent by system information, and the first signaling is used to instruct the terminal to monitor the PDCCH with repetition transmission in multiple time slots.

[0011] As an improvement of the above scheme, the first signaling includes first information, and the first information is used to instruct the terminal to monitor the PDCCH with repetition transmission in multiple time slots and / or the number of repetitions of the PDCCH.

[0012] As an optional implementation, the monitoring of the PDCCH with repetition transmission according to the indication signaling includes:

[0013] in response to the first information, obtaining a time interval between PDCCH monitoring windows predefined by the network side;

[0014] determining 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;

[0015] monitoring the PDCCH with repetition transmission in each PDCCH monitoring window.

[0016] As an optional implementation, the monitoring of the PDCCH with repetition transmission according to the indication signaling includes:

[0017] in response to the first information, monitoring the PDCCH with repetition transmission in the starting time slot of the first PDCCH monitoring window and the subsequent consecutive time slots.

[0018] As an optional implementation, the first signaling further includes second information, and the second information is used to indicate the offset between PDCCH monitoring windows;

[0019] then the monitoring of the PDCCH with repetition transmission according to the indication signaling includes:

[0020] determining 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;

[0021] monitoring the PDCCH with repetition transmission in each PDCCH monitoring window.

[0022] As an optional implementation, the first signaling further comprises second information, the second information being used for indicating an index of a first parameter table; the first parameter table at least comprising an offset of each PDCCH monitoring window;

[0023] According to the indication signaling, monitoring the repeatedly transmitted PDCCHs comprises:

[0024] According to the index of the first parameter table, obtaining the offset of each PDCCH monitoring window, and determining a starting slot of each PDCCH monitoring window;

[0025] Monitoring the repeatedly transmitted PDCCHs in the slot of each PDCCH monitoring window.

[0026] As an optional implementation, the indication signaling is second signaling transmitted through system information, the second signaling being used for indicating that the terminal monitors the repeatedly transmitted PDCCHs in a single slot.

[0027] As an improvement of the above solution, the second signaling comprises third information, the third information being used for indicating that the terminal monitors the repeatedly transmitted PDCCHs in a single slot and / or a repetition number of the PDCCHs.

[0028] According to the indication signaling, monitoring the repeatedly transmitted PDCCHs comprises:

[0029] In response to the third information, monitoring the repeatedly transmitted PDCCHs in a starting symbol of a first PDCCH and continuous symbols after the first PDCCH.

[0030] As an optional implementation, the second signaling further comprises fourth information, the fourth information being used for indicating a symbol interval of the repeatedly transmitted PDCCHs;

[0031] According to the indication signaling, monitoring the repeatedly transmitted PDCCHs comprises:

[0032] According to the starting symbol of the first PDCCH and the symbol interval, determining a starting symbol of each PDCCH after the first PDCCH;

[0033] Monitoring the repeatedly transmitted PDCCHs according to the starting symbol of each PDCCH.

[0034] As an optional implementation, the second signaling further comprises fourth information, the fourth information being used for indicating an index of a second parameter table; the second parameter table at least comprising a starting symbol index of each PDCCH;

[0035] According to the indication signaling, monitoring the repeatedly transmitted PDCCHs comprises:

[0036] obtaining a starting symbol of each PDCCH according to the index of the second parameter table;

[0037] monitoring the repeatedly transmitted PDCCHs according to the starting symbol of each PDCCH.

[0038] The embodiments of the present disclosure further provide a PDCCH detection method, applied to a network side, and the method comprises the following steps:

[0039] sending indication signaling to a terminal; wherein the indication signaling is used to instruct the terminal to monitor repeatedly transmitted physical downlink control channels (PDCCHs).

[0040] The embodiments of the present disclosure further provide a PDCCH detection device, applied to a terminal side, and the device comprises the following steps:

[0041] an indication signaling receiving module, used to receive indication signaling sent by a network side; wherein the indication signaling is used to instruct a terminal to monitor repeatedly transmitted physical downlink control channels (PDCCHs).

[0042] a channel monitoring module, used to monitor repeatedly transmitted PDCCHs according to the indication signaling.

[0043] The embodiments of the present disclosure further provide a PDCCH detection device, applied to a network side, and the device comprises the following steps:

[0044] an indication signaling sending module, used to send indication signaling to a terminal; wherein the indication signaling is used to instruct the terminal to monitor repeatedly transmitted physical downlink control channels (PDCCHs).

[0045] The embodiments of the present disclosure further provide 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 executes the computer program to implement the PDCCH detection method in any one of the above embodiments.

[0046] The embodiments of the present disclosure further provide a computer readable storage medium, comprising a stored computer program, wherein the computer program controls a device where the computer readable storage medium is located to execute the PDCCH detection method in any one of the above embodiments when the computer program is running.

[0047] The embodiments of the present disclosure further provide a computer program product, comprising a computer program or computer instructions, wherein the computer program or the computer instructions are executed by a processor to implement the PDCCH detection method in any one of the above embodiments.

[0048] Compared with the related art, the PDCCH detection method, device, equipment, storage medium and program product provided by the present disclosure can support PDCCH repetition transmission and detection in the initial access stage to adapt to different satellite communication scenarios and channel conditions and achieve PDCCH coverage performance enhancement. BRIEF DESCRIPTION OF DRAWINGS

[0049] FIG. 1 is a flow diagram of a PDCCH detection method according to an embodiment of the present disclosure;

[0050] FIG. 2 is a schematic diagram of PDCCH detection in multiple time slots according to an embodiment of the present disclosure;

[0051] FIG. 3 is a schematic diagram of PDCCH detection in a single time slot according to an embodiment of the present disclosure;

[0052] FIG. 4 is a flow diagram of another PDCCH detection method according to an embodiment of the present disclosure;

[0053] FIG. 5 is a structural diagram of a PDCCH detection device according to an embodiment of the present disclosure;

[0054] FIG. 6 is a structural diagram of another PDCCH detection device according to an embodiment of the present disclosure;

[0055] FIG. 7 is a structural diagram of a PDCCH detection equipment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0057] In the description of the present disclosure, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present disclosure and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0058] The terms "first", "second", etc. are used only for the purpose of description and are not to be interpreted as indicating or implying relative importance or a specific number of technical features indicated. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0059] It should be noted that the embodiments of the present disclosure are applied to a wireless communication system, which includes a terminal and a network side device. The terminal is a terminal device or a user terminal (User Equipment, UE), which can be a mobile phone, a tablet, a computer, a smart wearable device, 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.

[0060] In the NTN scenario, the UE performs PDCCH blind detection, which needs to determine the time-frequency resources occupied by the control resource set (CORESET) and search space (SS) encapsulating the PDCCH first. In the initial access stage, the time-frequency resource configuration of CORESET0 is transmitted through the Master Information Block (MIB) information. After the UE synchronizes with the cell, the MIB information of the cell is demodulated, the time-frequency resource position of CORESET0 is obtained through pdcch-ConfigSIB1, and Type0-PDCCH is demodulated. In addition, the MIB provides system frame number (SFN), subcarrier spacing (SCS-Subcarrier Spacing, SCS), cell information, etc. The UE combines other information in the MIB to determine the size of the CORESET0 time-frequency resource, the frequency domain resource block (Resource Block, RB) offset, and the starting time slot and starting symbol position of the CORESET0. If the synchronization signal block (Synchronization Signal Block, SSB) and the CORESET0 use a time division multiplexing (TDM) multiplexing mode, the terminal needs to monitor the Type0-PDCCH in two time slots, which are referred to as the Type0-PDCCH monitoring window, and the starting time slot number is n0. The period of the monitoring window is equal to the SSB period. If the SSB and the CORESET0 use a frequency division multiplexing (FDM) multiplexing mode, the CORESET0 and the SSB are in the same time slot (slot), and the terminal determines the time domain information of the CORESET0 through the time domain information of the SSB.

[0061] It should be noted that the CORESET solves the existence range problem of the PDCCH, such as the frequency domain and the time domain resource, but the configuration of the CORESET does not indicate the specific time domain position of the UE detecting the PDCCH, and the specific time domain position of the UE detecting the PDCCH is given by the monitoring occasion given by the search space. The CORESET can be configured at any frequency domain position, and the search space solves the problem of how the UE searches, and the purpose is to reduce the blind detection complexity of the 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 the PDCCH on the specified time-frequency resource. A CORESET can be bound to multiple search spaces, but a search space can be bound to only one CORESET.

[0062] In the cell synchronization stage, the UE does not receive the RRC signaling configured with the indexed CORESET and the search space, and the terminal needs to determine the PDCCH detection window by the MIB indication information when monitoring the Type0 PDCCH scheduling the system information block 1 (SIB1), and periodically monitors the candidate PDCCH. If the network side sends multiple repeated PDCCHs, the related technology does not have a related scheme to make the terminal 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 the PDCCH.

[0063] In order to solve the above problems, referring to FIG. 1, which is a flowchart of a PDCCH detection method provided by an embodiment of the present disclosure, the present embodiment provides a PDCCH detection method applied to a terminal side in a wireless communication system. The method comprises steps S11 to S12:

[0064] S11, receiving indication signaling sent by a network side; wherein the indication signaling is used to indicate that the terminal monitors the repeatedly transmitted physical downlink control channel (PDCCH);

[0065] S12, monitoring the repeatedly transmitted PDCCH according to the indication signaling.

[0066] In the embodiments of the present disclosure, a blind detection method for PDCCH repeated transmission for scheduling SIB1 in an NTN scenario is proposed, Type0 PDCCH repeated transmission and PDCCH blind detection are supported to adapt to different satellite communication scenarios and channel conditions. In the initial access stage, the network side sends MIB information and indication signaling to the terminal side through system information before repeated transmission of PDCCH, the MIB information is used to determine 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 slot n0 and starting symbol index of the monitoring window of the first PDCCH. The indication signaling is used to indicate that the terminal monitors the PDCCH of repeated transmission. After receiving the MIB information and the indication signaling, the terminal determines that the PDCCH of repeated transmission needs to be monitored according to the indication signaling, and determines the size of the time-frequency resources occupied by the multiple PDCCHs of repeated transmission and the slot positions after the monitoring window of the first PDCCH, so as to monitor the multiple PDCCHs of repeated transmission on the corresponding time-frequency domain resources.

[0067] It should be noted that the first PDCCH, that is, the first transmitted PDCCH in the PDCCH of repeated transmission, in the present scheme, the PDCCH of repeated transmission may carry the same control information, or may each carry a part of the control information, the terminal performs blind detection in the multiple PDCCH detection windows, and can decode the downlink control information carried by the PDCCH by detecting each candidate PDCCH separately or combining the control information carried by multiple PDCCHs.

[0068] Based on the problem that the PDCCH coverage performance is limited in non-terrestrial network communication, in order to support PDDCH repeated transmission for scheduling SIB1 to improve coverage performance, and in view of the problems that a single transmission point is not currently supported to send PDCCH repetition, and the time-frequency domain resource configuration of PDCCH repetition in the initial access process, a blind detection method for PDCCH repeated transmission for scheduling SIB1 in an NTN scenario is proposed, through flexible CORESET0 and search space0 time-frequency resource allocation and scheduling mechanism, Type0 PDCCH repeated transmission and PDCCH blind detection are supported, PDCCH repeated transmission and detection in the initial access stage are supported, to adapt to different satellite communication scenarios and channel conditions, and to improve the PDCCH coverage performance of NTN downlink.

[0069] On the basis of the above-mentioned embodiments, as a first optional implementation, the indication signaling is first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCHs on multiple time slots. That is, in the embodiments of the present disclosure, the same satellite beam transmits the repeatedly transmitted PDCCHs, and the repeatedly transmitted PDCCHs are transmitted through multiple time slots within the same system frame number (SFN).

[0070] Optionally, the first signaling at least includes first information, and the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCHs on multiple time slots and / or the number of repetitions of the PDCCHs.

[0071] That is, the first information is used to instruct the network side to repeatedly transmit the PDCCHs, to instruct the terminal to monitor the repeatedly transmitted PDCCHs on multiple PDCCH monitoring windows respectively, and the first information can also be used to instruct the number of repetitions of the repeatedly transmitted PDCCHs, to instruct the terminal to monitor the number of repetitions of the candidate PDCCHs, and when the number of repetitions is not instructed, the number of repetitions is a preset value, for example, 2, etc.

[0072] Referring to FIG. 2, which is a schematic diagram of the principle of detecting the PDCCHs on multiple time slots in the embodiments of the present disclosure, the process of the terminal blindly detecting the PDCCHs is further optimized as follows.

[0073] In the first mode, the network side predefines the time interval between the PDCCH monitoring windows, and then the network side only includes the first information in the first signaling sent by the network side, to instruct the terminal to monitor multiple candidate PDCCHs. The first information can also indicate the number of repetitions of the repeatedly transmitted PDCCHs through 1 bit or multiple bit fields.

[0074] Then, step S12, that is, monitoring the repeatedly transmitted PDCCHs according to the indication signaling, includes:

[0075] In response to the first information, acquiring the time interval between the PDCCH monitoring windows predefined by the network side;

[0076] According to the starting time slot of the first PDCCH monitoring window and the time interval, determining the starting time slot of each PDCCH monitoring window after the first PDCCH monitoring window;

[0077] Monitoring the repeatedly transmitted PDCCHs on the time slots of each PDCCH monitoring window.

[0078] Specifically, the terminal receives MIB information and the first signaling sent by the network side. Based on the MIB information, it determines the size of the time-frequency domain resources occupied by CORESET0, including the number of time-domain symbols and frequency-domain resource blocks, as well as the starting time slot n0 and starting symbol index of the first PDCCH monitoring window. Based on the first information carried in the first signaling, the terminal determines that the network side has transmitted duplicate PDCCHs, and may also determine the number of duplicate PDCCH transmissions based on the first information. The terminal then determines the number of times the PDCCH has been transmitted repeatedly based on the predefined time interval n of the PDCCH monitoring window. offset Determine the starting timeslot of the monitoring window for recurring PDCCH transmissions after the first PDCCH monitoring window, for example, the starting timeslot of the second PDCCH monitoring window n0+n. offset This allows for blind detection of PDCCH on the corresponding time-frequency resources, monitoring for repeatedly transmitted PDCCH.

[0079] In the second approach, the network side does not predefine the time interval between PDCCH monitoring windows, and the terminal monitors multiple repeating PDCCHs in consecutive time slots by default. Therefore, step S12, which involves monitoring repeatedly transmitted PDCCHs according to the indication signaling, includes:

[0080] In response to the first information, the repeatedly transmitted PDCCH is monitored in the starting time slot of the first PDCCH monitoring window and in subsequent consecutive time slots.

[0081] Specifically, the terminal receives MIB information and the first signaling from the network side. Based on the MIB information, it 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 first information carried in the first signaling, the terminal determines that the network side has transmitted duplicate PDCCHs, and may also determine the number of duplicate PDCCH transmissions based on the first information. By default, the terminal monitors multiple duplicate PDCCHs in consecutive time slots after the starting time slot of the first PDCCH monitoring window. Assuming the number of duplicate PDCCHs is N, the terminal sequentially monitors multiple candidate PDCCHs in consecutive 2*N time slots starting from n0.

[0082] In the third approach, 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 multiple candidate PDCCHs need to be monitored, and the first information can also indicate the number of times the PDCCH is repeatedly transmitted. The second information is used to indicate the offset n between 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.

[0083] Then, the step S12, i.e., the monitoring the repeatedly transmitted PDCCH according to the indication signaling, comprises:

[0084] determining 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;

[0085] monitoring the repeatedly transmitted PDCCH in the time slots of each PDCCH monitoring window.

[0086] Specifically, the terminal receives the MIB information and the first signaling transmitted by the network side, determines the time-frequency domain resource size occupied by each repeatedly transmitted PDCCH, and the starting time slot n0 and 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 transmits the repeatedly transmitted PDCCH, and can also determine the number of PDCCH repeated transmissions according to the first information. According to the offset n between the PDCCH monitoring windows carried in the second information, the terminal determines the starting time slot of the monitoring window of the repeatedly transmitted PDCCH after the first PDCCH monitoring window, for example, the starting time slot n0+n of the second PDCCH monitoring window, and then performs PDCCH blind detection on the corresponding time-frequency resource to monitor the repeatedly transmitted PDCCH. offset offset

[0087] In the fourth mode, the network side does not predefine the time interval between the PDCCH monitoring windows, and the first signaling transmitted by the network side includes the first information and the second information. The first information is used to inform the terminal that multiple candidate PDCCHs need to be monitored, and the first information can also indicate the number of repeatedly transmitted PDCCHs. The second information is used to indicate the index of the first parameter table, and the first parameter table at least includes the offset of each PDCCH monitoring window.

[0088] Then, the step S12, i.e., the monitoring the repeatedly transmitted PDCCH according to the indication signaling, comprises:

[0089] According to the index of the first parameter table, the offset of each PDCCH monitoring window is obtained, and the starting time slot of each PDCCH monitoring window is determined;

[0090] monitoring the repeatedly transmitted PDCCH in the time slots of each PDCCH monitoring window.

[0091] ​​Specifically, the network side determines the size and starting position of the time domain resource occupied by the repeated PDCCH, defines a PDCCH monitoring window time domain resource parameter table as the first parameter table. The parameter table contains a plurality of PDCCH monitoring window time domain resource configuration related parameters, including a first PDCCH detection window offset O0, a second PDCCH detection window offset O1, and a starting symbol index.

[0092] The network side sends the first signaling, which includes first information and second information. The first information indicates that the terminal needs to monitor a plurality of repeated PDCCHs, and can also be used to indicate the number of PDCCHs for repetition transmission. The second information is used to indicate the index of the first parameter table.

[0093] The terminal receives the MIB information and the first signaling, determines the CORESET0 time-frequency resource size through the MIB information. The first information carried by the first signaling determines that the PDCCH for repetition transmission needs to be monitored in a plurality of PDCCH monitoring windows, and the starting time slot and the starting symbol index of each PDCCH monitoring window are determined based on the index indicated by the second information to query the first parameter table. The starting time slot of the first PDCCH monitoring window is calculated as n0 through the following formula, the starting time slot of the second PDCCH monitoring window is calculated as n1 through the following formula, and so on.

[0094] Wherein, μ is the subcarrier spacing configuration, i is the index number of SSB, M is the overlap factor, is the number of slots in a frame.

[0095] Taking the repetition number N=2 as an example, the first parameter table of 2 times PDCCH repetition transmission is shown in Table 1, for example:

[0096] Table 1

[0097] In the above scheme, the first signaling can also be carried in the MIB information. For the fourth mode, the information of the searchSpaceZero field in the MIB is multiplexed to indicate the index of the first parameter table. The terminal side needs to first determine to monitor the PDCCH for repetition transmission in a plurality of PDCCH monitoring windows according to the first information, and then query the first parameter table according to the information of the searchSpaceZero field to determine the starting time slot and the starting symbol index of each PDCCH monitoring window.

[0098] By adopting the technical means of the embodiments of the present disclosure, the coverage enhancement scheme supporting PDCCH repetition can be implemented, and the PDCCH repeatedly transmitted on multiple time slots can be monitored. The terminal can accurately acquire the time-frequency domain resource size and position occupied by the PDCCH repetition and the number of repeated transmissions and other information according to the first signaling issued by the network side, so as to perform PDCCH blind detection on the corresponding time-frequency resources, thereby improving the signal-to-noise ratio or coding gain.

[0099] On the basis of the above-mentioned embodiments, as a second optional implementation, the indication signaling is second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the PDCCH repeatedly transmitted on a single time slot. That is, in the embodiments of the present disclosure, the coverage enhancement scheme supporting multiple PDCCH repetition transmissions in a time slot is implemented, and the symbol-level (intra-slot) PDCCH repetition transmission is implemented.

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

[0101] That is, the third information is used to instruct the network side to repeatedly transmit the PDCCH, and informs the terminal to monitor the PDCCH repeatedly transmitted in a single time slot, respectively. The third information can also be used to instruct the number of repetitions of the PDCCH repeatedly transmitted, and informs the terminal to monitor the number of repetitions of the candidate PDCCH. When the number of repetitions is not instructed, the default number of repetitions is a preset value, for example, 2, etc.

[0102] Referring to FIG. 3, it is a schematic diagram of the principle of detecting the PDCCH in a single time slot in the embodiments of the present disclosure, and the process of the terminal blind detecting the PDCCH is further optimized as follows.

[0103] In the first mode, the second signaling sent by the network side only includes the third information, and the terminal monitors the multiple PDCCHs repeatedly transmitted on the continuous multiple symbols by default.

[0104] Then, step S12, that is, the monitoring of the PDCCH repeatedly transmitted according to the indication signaling includes:

[0105] In response to the third information, the PDCCH repeatedly transmitted is monitored on the starting symbol of the first PDCCH and the continuous symbols after the starting symbol.

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

[0107] In the second mode, the second signaling sent by the network side includes third information and fourth information, the third information is used to inform the terminal that multiple candidate PDCCHs need to be monitored, and the third information can also indicate the number of repeated transmissions of the PDCCH. The fourth information is used to indicate the symbol interval of the repeated PDCCH.

[0108] Then step S12, that is, monitoring the repeated PDCCH according to the indication signaling, includes:

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

[0110] monitoring the repeated PDCCH according to the starting symbol of each PDCCH.

[0111] Specifically, the terminal receives the MIB information and the second signaling sent by the network side, determines the number of symbols occupied by CORESET0 and the starting slot according to the MIB information, and the starting symbol index of the first PDCCH. According to the third information carried in the second signaling, the terminal determines that the network side transmits the repeated PDCCH, and can also determine the number of repeated transmissions of the PDCCH 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 the multiple repeated 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 inform the terminal that multiple candidate PDCCHs need to be monitored, and the third information can also indicate the number of repeated transmissions of the PDCCH. The fourth information is used to indicate the index of the second parameter table, and the second parameter table at least includes the starting symbol index of each PDCCH.

[0113] Then step S12, that is, monitoring the repeated PDCCH according to the indication signaling, includes:

[0114] According to the index of the second parameter table, a starting symbol of each PDCCH is obtained;

[0115] According to the starting symbol of each PDCCH, the PDCCHs of the repeated transmission are monitored.

[0116] Specifically, the network side defines a parameter table related to the time domain resource of the PDCCH monitoring window as a second parameter table. The parameter table contains an offset O for determining the starting slot of the PDCCH detection window, and a starting symbol index parameter and other information. The starting symbol index is indicated in a combination of 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 inform the terminal to perform blind detection on the PDCCHs of the repeated transmission, 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. According to the third information carried by the second signaling, the terminal determines the candidate PDCCHs that need to be monitored for repeated transmission, and determines the size of the time-frequency resource 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 slot of the PDCCH monitoring window and the starting symbol index of each PDCCH, so that PDCCH blind detection is performed at the corresponding time-frequency domain resource position. The second parameter table is shown in Table 2, for example:

[0119] Table 2

[0120] In the above scheme, the second signaling can also be carried in the MIB information. For the third way, the information of the searchSpaceZero field in the MIB is multiplexed to indicate the index of the second parameter table. The terminal side needs to first determine to monitor 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 slot and the starting symbol index of each PDCCH monitoring window. When the number of PDCCH repetitions is large, the network side needs to avoid overlapping symbols occupied by 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, the CORESET0 corresponding to different SSB indexes is avoided to occupy repeated time slot resources. The third way determines the starting symbol index of each PDCCH repetition by configuring the parameter table, which is more flexible than the resource allocation mode of the fixed symbol interval in the first way, and since the starting symbol index of each PDCCH is independently configured, it is beneficial to support the case that the time slot resources of CORESET0 corresponding to different SSB indexes are repeated.

[0121] By adopting the technical means of the embodiments of the present disclosure, the coverage enhancement scheme supporting PDCCH repetition can be implemented, and PDCCH repeated transmission can be monitored on multiple symbols of a single time slot. The terminal can accurately obtain the time-frequency domain resource size and position occupied by PDCCH repetition and the number of repeated transmissions and other information according to the second signaling issued by the network side, so as to perform PDCCH blind detection on the corresponding time-frequency resources, thereby improving the signal-to-noise ratio or coding gain.

[0122] Referring to FIG. 4, it is a flow diagram of another PDCCH detection method provided by the embodiments of the present disclosure. The embodiments of the present disclosure further provide another PDCCH detection method applied to the network side, which comprises the following step S21:

[0123] S21, sending 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.

[0124] In an optional implementation, the indication signaling is first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on multiple time slots.

[0125] The first signaling comprises first information, and the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on multiple time slots and / or the number of PDCCH repetitions.

[0126] Optionally, the first signaling is used to trigger the terminal to obtain a time interval between PDCCH monitoring windows predefined by the network side, 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 time interval, and to monitor the repeatedly transmitted PDCCH on the time slots of each PDCCH monitoring window; or to monitor the repeatedly transmitted PDCCH on the starting time slot of the first PDCCH monitoring window and the continuous time slots after the starting time slot.

[0127] Alternatively, the first signaling further comprises second information, and the second information is used to instruct 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 to detect the repeatedly transmitted PDCCH on the time slots of each PDCCH monitoring window.

[0128] Alternatively, the second information is used to indicate an index of a first parameter table, the first parameter table comprising at least an offset of each PDCCH monitoring window. 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 a starting slot of each PDCCH monitoring window, and monitor the repeatedly transmitted PDCCH in each PDCCH monitoring window.

[0129] In another optional implementation, the indication signaling is second signaling sent through system information, and the second signaling is used to indicate that the terminal monitors the repeatedly transmitted PDCCH in a single slot.

[0130] The second signaling comprises third information, and the third information is used to indicate that the terminal monitors the repeatedly transmitted PDCCH in a single slot and / or a repetition number of the PDCCH.

[0131] Optionally, the second signaling is used to trigger the terminal to monitor the repeatedly transmitted PDCCH in a starting symbol of a first PDCCH and continuous symbols after the starting symbol.

[0132] Alternatively, the second signaling further comprises fourth information, and the fourth information is used to indicate a symbol interval of the repeatedly transmitted PDCCH. The second signaling is used to indicate that the terminal determines a starting symbol of each PDCCH after the first PDCCH according to the starting symbol of the first PDCCH and the symbol interval, and monitors the repeatedly transmitted PDCCH according to the starting symbol of each PDCCH.

[0133] Alternatively, the second signaling further comprises fourth information, and the fourth information is used to indicate an index of a second parameter table; the second parameter table comprises at least a starting symbol index of each PDCCH. The second signaling is used to trigger the terminal to obtain the 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.

[0134] It should be noted that the PDCCH detection method applied to the network side provided by the embodiments of the present disclosure corresponds to all the flow steps of the PDCCH detection method applied to the terminal side in the above embodiments one by one, and the working principles and beneficial effects of the two are the same, and thus will not be repeated.

[0135] Referring to FIG. 5, it is a structural schematic diagram of a PDCCH detection device provided by the embodiments of the present disclosure, and the embodiments of the present disclosure further provide a PDCCH detection device 30 applied to the terminal side, the device 30 comprising:

[0136] The indication signaling receiving module 31 is configured to receive indication signaling sent by the network side; the indication signaling is used to instruct the terminal to monitor a repeatedly transmitted physical downlink control channel (PDCCH).

[0137] The channel monitoring module 32 is configured to monitor the repeatedly transmitted PDCCH according to the indication signaling.

[0138] It should be noted that the PDCCH detection device applied to the terminal side provided in the embodiments of the present disclosure is used to perform all the process steps of the PDCCH detection method applied to the terminal side in the above embodiments, and the working principles and beneficial effects of the two are one-to-one correspondence, thus not being described in detail.

[0139] Referring to FIG. 6, it is a structural schematic diagram of another PDCCH detection device provided in the embodiments of the present disclosure, and the embodiments of the present disclosure further provide another PDCCH detection device 40 applied to the network side, the device 40 comprises:

[0140] The indication signaling sending module 41 is configured to send indication signaling to the terminal; the indication signaling is used to instruct the terminal to monitor a repeatedly transmitted physical downlink control channel (PDCCH).

[0141] It should be noted that the PDCCH detection device applied to the network side provided in the embodiments of the present disclosure is used to perform all the process steps of the PDCCH detection method applied to the network side in the above embodiments, and the working principles and beneficial effects of the two are one-to-one correspondence, thus not being described in detail.

[0142] Referring to FIG. 7, it is a structural schematic diagram of a PDCCH detection device provided in the embodiments of the present disclosure, and the embodiments of the present disclosure further provide a PDCCH detection device 50, which comprises a processor 51, a memory 52, and a computer program stored in the memory and configured to be executed by the processor, and the processor executes the computer program to realize the PDCCH detection method according to any one of the above embodiments.

[0143] The embodiments of the present disclosure further provide a computer readable storage medium, which comprises a stored computer program, wherein the computer program controls the device where the computer readable storage medium is located to execute the PDCCH detection method according to any one of the above embodiments when the computer program is running.

[0144] The embodiments of the present disclosure further provide a computer program product, which comprises a computer program or computer instructions, and the computer program or the computer instructions realize the PDCCH detection method according to any one of the above embodiments when executed by a processor.

[0145] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing relevant hardware. The program can be stored in a computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM), a random access memory (RAM), or the like.

[0146] The above is the preferred embodiment of the present disclosure. It should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present disclosure, and these improvements and refinements are also considered within the protection scope of the present disclosure.

Claims

A PDCCH detection method applied to a terminal side, the method comprising: receiving 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); monitoring the repeatedly transmitted PDCCH according to the indication signaling. The PDCCH detection method of claim 1, wherein, The indication signaling is first signaling sent through system information, and the first signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on multiple time slots. The PDCCH detection method of claim 2, wherein, The first signaling comprises first information, and the first information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on multiple time slots and / or the number of repetitions of the PDCCH. The PDCCH detection method of claim 3, wherein, The monitoring of the repeatedly transmitted PDCCH according to the indication signaling comprises: in response to the first information, obtaining a time interval between PDCCH monitoring windows predefined by the network side; determining the starting time slot of each PDCCH monitoring window after a first PDCCH monitoring window according to the starting time slot of the first PDCCH monitoring window and the time interval; and monitoring the repeatedly transmitted PDCCH on the time slots of each PDCCH monitoring window. The PDCCH detection method of claim 3, wherein, The monitoring of the repeatedly transmitted PDCCH according to the indication signaling comprises: in response to the first information, monitoring the repeatedly transmitted PDCCH on the starting time slot of a first PDCCH monitoring window and the continuous time slots after the starting time slot. The PDCCH detection method of claim 3, wherein, The first signaling further comprises second information, and the second information is used to indicate an offset between PDCCH monitoring windows; The monitoring of the repeatedly transmitted PDCCH according to the indication signaling comprises: determining the starting time slot of each PDCCH monitoring window after a first PDCCH monitoring window according to the starting time slot of the first PDCCH monitoring window and the offset; and monitoring the repeatedly transmitted PDCCH on the time slots of each PDCCH monitoring window. The PDCCH detection method of claim 3, wherein, The first signaling further comprises second information, and the second information is used to indicate the index of a first parameter table; The first parameter table at least comprises the offset of each PDCCH monitoring window; The monitoring of the repeatedly transmitted PDCCH according to the indication signaling comprises: obtaining the offset of each PDCCH monitoring window according to the index of the first parameter table to determine the starting time slot of each PDCCH monitoring window; and monitoring the repeatedly transmitted PDCCH on the time slots of each PDCCH monitoring window. The PDCCH detection method of claim 1, wherein, The indication signaling is second signaling sent through system information, and the second signaling is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on a single time slot. The PDCCH detection method of claim 8, wherein, The second signaling comprises third information, and the third information is used to instruct the terminal to monitor the repeatedly transmitted PDCCH on a single time slot and / or the number of repetitions of the PDCCH. The PDCCH detection method of claim 9, wherein, The monitoring of the repeatedly transmitted PDCCH according to the indication signaling comprises: in response to the third information, monitoring the repeatedly transmitted PDCCH on the starting symbol of a first PDCCH and the continuous symbols after the starting symbol. The PDCCH detection method of claim 9, wherein, The second signaling further comprises fourth information, the fourth information being used for indicating a symbol interval of the repeatedly transmitted PDCCHs; The method further comprises: determining a starting symbol of each of the PDCCHs after the first PDCCH according to the starting symbol of the first PDCCH and the symbol interval; and monitoring the repeatedly transmitted PDCCHs according to the starting symbol of each of the PDCCHs. The PDCCH detection method of claim 9, wherein, The second signaling further comprises fourth information, the fourth information being used for indicating an index of a second parameter table; The second parameter table comprises at least starting symbol indexes of the PDCCHs; The method further comprises: obtaining the starting symbol of each of the PDCCHs according to the index of the second parameter table; and monitoring the repeatedly transmitted PDCCHs according to the starting symbol of each of the PDCCHs. A PDCCH detection method applied to a network side, the method comprising: sending, to a terminal, an indication signaling; wherein the indication signaling is used for instructing the terminal to monitor repeatedly transmitted PDCCHs. A PDCCH detection apparatus applied to a terminal side, the apparatus comprising: an indication signaling receiving module configured to receive an indication signaling sent by a network side; wherein the indication signaling is used for instructing the terminal to monitor repeatedly transmitted PDCCHs; and a channel monitoring module configured to monitor the repeatedly transmitted PDCCHs according to the indication signaling. A PDCCH detection apparatus applied to a network side, the apparatus comprising: an indication signaling sending module configured to send, to a terminal, an indication signaling; wherein the indication signaling is used for instructing the terminal to monitor repeatedly transmitted PDCCHs. 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, the processor implementing the PDCCH detection method according to any one of claims 1 to 13 when executing the computer program. A computer-readable storage medium comprising a stored computer program, wherein, A computer readable storage medium is controlled to perform the PDCCH detection method according to any one of claims 1 to 13 when the computer program is running. A computer program product comprising a computer program or computer instructions, the computer program or the computer instructions implementing the PDCCH detection method according to any one of claims 1 to 13 when executed by a processor.

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