A channel monitoring method and related device

Abstract

An embodiment of the present application discloses a channel monitoring method, wherein the method includes: a terminal device UE determines a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, and the PDCCH is used to carry a control resource set coreset#0; if the UE fails to monitor the PDCCH at the first monitoring time, the UE determines a second monitoring time of the PDCCH according to the first SSB and an SSB having a quasi-co-location QCL relationship with the first SSB; and the UE monitors the PDCCH at the second monitoring time. The network side does not need to send additional SSBs to reduce the delay in the network device sending SSBs. The terminal determines the monitoring time (second monitoring time) of the PDCCH according to the SSB associated with the PDCCH. In the case where the PDCCH cannot be monitored at the first monitoring time, the PDCCH is monitored at the second monitoring time to ensure that the terminal can successfully monitor the PDCCH.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a channel monitoring method and related devices. Background Art

[0002] User equipment (UE), also known as terminal equipment, and network equipment such as base station (gNodeB, gNB) in the initial access process before establishing communication, the base station broadcasts the synchronization signal block (SSB), UE first searches and demodulates SSB to obtain important information for initial access. After demodulating SSB, UE can determine the monitoring occasions of physical downlink control channel (PDCCH), and by monitoring PDCCH at the monitoring occasion, it can obtain Physical Downlink Shared Channel (PDSCH).

[0003] In the context of the fifth generation mobile networks (5G), technologies deployed in shared frequency bands are collectively referred to as new radio unlicensed (NRU). Relevant regulations stipulate that systems operating in shared frequency bands must support the listen before talk (LBT) mechanism. When the base station performs LBT on a certain PDCCH, the UE cannot monitor the PDCCH after demodulating the SSB to obtain the monitoring timing of the PDCCH. Summary of the invention

[0004] In view of this, a first aspect of an embodiment of the present application provides a channel monitoring method, including:

[0005] The terminal device UE determines the first monitoring time of the physical downlink control channel PDCCH according to the first synchronization signal block SSB, and the PDCCH is used to carry the control resource set coreset#0;

[0006] If the UE fails to monitor the PDCCH at the first monitoring opportunity, the UE determines a second monitoring opportunity of the PDCCH according to the first SSB and the SSB having a quasi co-location QCL relationship with the first SSB;

[0007] The UE monitors the PDCCH at the second monitoring opportunity.

[0008] In the embodiment of the present application, the network side does not need to send additional SSBs to reduce the delay of the network device in sending SSBs. The terminal determines the monitoring time (second monitoring time) of the PDCCH according to the SSB associated with the PDCCH in various ways. In the case where the PDCCH cannot be monitored at the first monitoring time, the PDCCH is monitored at the second monitoring time to ensure that the terminal can successfully monitor the PDCCH.

[0009] In a possible implementation, the second monitoring opportunity includes a target system frame number SFN c and target time slot number n c ,in,

[0010] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , SFN ssb，i The system frame number of the first SSB, SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indices have the same index;

[0011] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, n QCLed_ssb，i The time slot number of QCLed_SSB.

[0012] In the embodiment of the present application, the second monitoring timing can be determined in a variety of ways, thereby improving the implementation flexibility of the solution.

[0013] In one possible implementation, the time slot position of the first SSB differs from the second listening opportunity by a time slot of 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0014] In one possible implementation, the Q value is The value can be any one of 1, 2, 4, 8, 16, 32, or 64.

[0015] In one possible implementation, Indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

[0016] In a possible implementation, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 of the next time slot;

[0017] Alternatively, the start symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0018] The number of symbols occupied by the PDCCH in the second monitoring occasion is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0019] In a possible implementation, when the number of PDCCHs is greater than 1, the UE determines a plurality of second listening opportunities according to the first offset and the starting symbol index of the second listening opportunity;

[0020] The first offset is the time domain offset between adjacent PDCCHs in the time domain.

[0021] In one possible implementation, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the master information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0022] In a possible implementation manner, after the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes:

[0023] The UE determines the time domain position of the target physical downlink shared channel PDSCH according to the PDCCH, and the target PDSCH carries the system information block SIB1 / remaining minimum system information RMSI.

[0024] In a possible implementation, the PDCCH corresponds to a plurality of different time domain locations;

[0025] The target PDSCH corresponds to a plurality of different time domain positions;

[0026] A PDCCH indicates the time domain location of a target PDSCH, or,

[0027] One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0028] In an embodiment of the present application, the PDCCH may indicate one or more target PDSCHs to save the occupancy of communication resources.

[0029] In a possible implementation manner, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0030] The UE determines the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, the time slot number where the PDCCH is located and the interval K0 between the time slot numbers where the PDCCH is located according to the PDCCH.

[0031] In a possible implementation, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, M / 2, M / 2+1};

[0032] Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0033] Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0034] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0035] Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0036] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0037] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

[0038] In a possible implementation manner, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0039] The UE determines the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring opportunity.

[0040] In a possible implementation manner, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0041] The UE obtains the number of target PDSCHs and the time domain information of the target PDSCH according to the newly added field in the downlink control information DCI carried in the PDCCH, such as "Time locations of PDSCHs for SIB1 / RMSI". The field "Timelocations of PDSCHs for SIB1 / RMSI" occupies {0, 1, ..., X} bits, and the value of X is any one of {0, 1, 2, 3, 4};

[0042] Alternatively, the number of target PDSCHs and the time domain information of the target PDSCHs are obtained according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0043] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0044] In a possible implementation, the subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz;

[0045] The SCS of PDCCH meets the following requirements: 120 kHz, 240 KHz, 480 KHz or 960 KHz.

[0046] In a second aspect, an embodiment of the present application provides a terminal device, including a processing module and a transceiver module:

[0047] A processing module 901 is used to determine a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, where the PDCCH is used to carry a control resource set coreset#0;

[0048] The processing module 901 is further configured to determine, if the transceiver module 902 fails to monitor the PDCCH at the first monitoring opportunity, the UE determining a second monitoring opportunity of the PDCCH according to the first SSB and the SSB having a quasi co-location QCL relationship with the first SSB;

[0049] The transceiver module 902 is further configured to monitor the PDCCH at a second monitoring opportunity.

[0050] In some optional embodiments of the present application, the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0051] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , SFN ssb，i The system frame number of the first SSB, SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indices have the same index;

[0052] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, n QCLed_ssb，i The time slot number of QCLed_SSB.

[0053] In some optional embodiments of the present application, the time slot position of the first SSB differs from the second listening opportunity by 0, 1, M / 2 or (M / 2)-1 time slots, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0054] In some optional embodiments of the present application, the Q value is The value can be any one of 1, 2, 4, 8, 16, 32, or 64.

[0055] In some optional embodiments of the present application, Indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

[0056] In some optional embodiments of the present application, the starting symbol index of the second listening opportunity is located in the time slot of the SSB with the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 in the next time slot;

[0057] Alternatively, the start symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0058] The number of symbols occupied by the PDCCH in the second monitoring occasion is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0059] In some optional embodiments of the present application,

[0060] The processing module 901 is also used to determine multiple second monitoring opportunities according to the first offset and the starting symbol index of the second monitoring opportunity when the number of PDCCHs is greater than 1; wherein the first offset is the time domain offset between adjacent PDCCHs in the time domain.

[0061] In some optional embodiments of the present application, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the master information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0062] In some optional embodiments of the present application, after the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes:

[0063] The processing module 901 is further configured to determine the time domain position of a target physical downlink shared channel PDSCH according to the PDCCH, where the target PDSCH carries the system information block SIB1 / remaining minimum system information RMSI.

[0064] In some optional embodiments of the present application, the PDCCH corresponds to a plurality of different time domain positions;

[0065] The target PDSCH corresponds to a plurality of different time domain positions;

[0066] A PDCCH indicates the time domain location of a target PDSCH, or,

[0067] One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0068] In some optional embodiments of the present application, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0069] The UE determines the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, the time slot number where the PDCCH is located and the interval K0 between the time slot numbers where the PDCCH is located according to the PDCCH.

[0070] In some optional embodiments of the present application, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0071] Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0072] Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0073] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0074] Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0075] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0076] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

[0077] In some optional embodiments of the present application,

[0078] The processing module 901 is further configured for the UE to determine the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring time.

[0079] In some optional embodiments of the present application,

[0080] The processing module 901 is further used to obtain the number of target PDSCHs and the time domain information of the target PDSCH according to the newly added field in the downlink control information DCI carried in the PDCCH, such as "Time locations of PDSCHs for SIB1 / RMSI", where the field "Time locations of PDSCHs for SIB1 / RMSI" occupies {0, 1, ..., X} bits, and X is any one of {0, 1, 2, 3, 4};

[0081] Alternatively, the number of target PDSCHs and the time domain information of the target PDSCHs are obtained according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0082] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0083] In some optional embodiments of the present application, the subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz; the SCS of the PDCCH satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz.

[0084] In a third aspect, an embodiment of the present application provides a communication device, including a processor and a transceiver. Specifically:

[0085] The processor is used to determine a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, where the PDCCH is used to carry a control resource set coreset#0;

[0086] The processor is further configured to determine, if the transceiver fails to monitor the PDCCH at the first monitoring opportunity, the UE determining a second monitoring opportunity of the PDCCH according to the first SSB and an SSB having a quasi co-location QCL relationship with the first SSB;

[0087] The transceiver is further configured to monitor the PDCCH at a second monitoring opportunity.

[0088] In some optional embodiments of the present application, the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0089] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , SFN ssb，i The system frame number of the first SSB, SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indices have the same index;

[0090] n c =n ssb，i, or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, n QCLed_ssb，i The time slot number of QCLed_SSB.

[0091] In some optional embodiments of the present application, the time slot position of the first SSB differs from the second listening opportunity by 0, 1, M / 2 or (M / 2)-1 time slots, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0092] In some optional embodiments of the present application, the Q value is The value can be any one of 1, 2, 4, 8, 16, 32, or 64.

[0093] In some optional embodiments of the present application, Indicated by parameters "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

[0094] In some optional embodiments of the present application, the starting symbol index of the second listening opportunity is located in the time slot of the SSB with the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 in the next time slot;

[0095] Alternatively, the start symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0096] The number of symbols occupied by the PDCCH in the second monitoring occasion is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0097] In some optional embodiments of the present application,

[0098] The processor is also used to determine multiple second monitoring opportunities according to the first offset and the starting symbol index of the second monitoring opportunity when the number of PDCCHs is greater than 1; wherein the first offset is the time domain offset between adjacent PDCCHs in the time domain.

[0099] In some optional embodiments of the present application, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the master information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0100] In some optional embodiments of the present application, after the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes:

[0101] The processor is further used to determine the time domain position of the target physical downlink shared channel PDSCH according to the PDCCH, and the target PDSCH carries the system information block SIB1 / remaining minimum system information RMSI.

[0102] In some optional embodiments of the present application, the PDCCH corresponds to a plurality of different time domain positions;

[0103] The target PDSCH corresponds to a plurality of different time domain positions;

[0104] A PDCCH indicates the time domain location of a target PDSCH, or,

[0105] One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0106] In some optional embodiments of the present application, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0107] The UE determines the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, the time slot number where the PDCCH is located and the interval K0 between the time slot numbers where the PDCCH is located according to the PDCCH.

[0108] In some optional embodiments of the present application, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0109] Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0110] Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0111] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0112] Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0113] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0114] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

[0115] In some optional embodiments of the present application,

[0116] The processor is further configured for the UE to determine the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring time.

[0117] In some optional embodiments of the present application,

[0118] The processor is further configured to obtain the number of target PDSCHs and time domain information of the target PDSCH according to a newly added field “Timelocations of PDSCHs for SIB1 / RMSI” in the downlink control information DCI carried in the PDCCH, where the field “Time locations of PDSCHs for SIB1 / RMSI” occupies {0, 1, …, X} bits, and the value of X is any one of {0, 1, 2, 3, 4};

[0119] Alternatively, the number of target PDSCHs and the time domain information of the target PDSCHs are obtained according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0120] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0121] In some optional embodiments of the present application, the subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz; the SCS of the PDCCH satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz.

[0122] In a fourth aspect, an embodiment of the present application provides a communication device, which can implement the functions performed by the terminal device in the method involved in the first aspect above. The communication device includes a processor, a memory, a receiver connected to the processor, and a transmitter connected to the processor; the memory is used to store program code and transmit the program code to the processor; the processor is used to drive the receiver and the transmitter to perform the method of the first aspect above according to the instructions in the program code; the receiver and the transmitter are respectively connected to the processor to perform the operation of XX in the methods of the above various aspects. Specifically, the transmitter can perform a sending operation, and the receiver can perform a receiving operation. Optionally, the receiver and the transmitter can be a radio frequency circuit, and the radio frequency circuit receives and sends messages through an antenna; the receiver and the transmitter can also be a communication interface, the processor is connected to the communication interface through a bus, and the processor receives or sends messages through the communication interface.

[0123] In a fifth aspect, an embodiment of the present application provides a communication device, which may include entities such as a network device or a chip, and the communication device includes: a processor, a memory; the memory is used to store instructions; the processor is used to execute the instructions in the memory, so that the communication device executes a method as described in any one of the first aspects above.

[0124] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes any possible implementation method as described in the first aspect above.

[0125] In the seventh aspect, an embodiment of the present application provides a computer program product (or computer program) storing one or more computer execution instructions. When the computer execution instructions are executed by the processor, the processor executes any possible implementation method of the first aspect described above.

[0126] In an eighth aspect, the present application provides a chip system, which includes a processor for supporting a computer device to implement the functions involved in the above aspects. In a possible design, the chip system also includes a memory, which is used to store program instructions and data necessary for the computer device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0127] In a ninth aspect, the present application provides a communication system, which includes a communication device as described in the third aspect or above. BRIEF DESCRIPTION OF THE DRAWINGS

[0128] Figure 1a A schematic diagram of an application scenario proposed in an embodiment of the present application;

[0129] Figure 1b A schematic diagram of another application scenario proposed in an embodiment of the present application;

[0130] Figure 2 This is a schematic diagram of the hardware structure of the communication device in the embodiment of the present application;

[0131] Figure 3 This is a schematic diagram of QCLed_SSB in an embodiment of the present application;

[0132] Figure 4 A schematic diagram of a multiplexing pattern in an embodiment of the present application;

[0133] Figure 5 Schematic diagram of PDCCH / SSB in multiplexing mode 2 in the prior art;

[0134] Figure 6 This is a schematic diagram of an embodiment of a channel monitoring method in an embodiment of the present application;

[0135] Figure 7 This is a schematic diagram of the time domain position of PDCCH and PDSCH in an embodiment of the present application;

[0136] Figure 8 This is another time domain position diagram of PDCCH and PDSCH in an embodiment of the present application;

[0137] Fig. 9 This is a schematic diagram of an embodiment of a terminal device in an embodiment of the present application. DETAILED DESCRIPTION

[0138] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances. This is merely a way of distinguishing objects with the same properties when describing the embodiments of the present application. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, so that a process, method, system, product, or device that includes a series of units is not necessarily limited to those units, but may include other units that are not explicitly listed or inherent to these processes, methods, products, or devices.

[0139] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. In the description of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the present application is only a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the present application, "at least one" refers to one or more items, and "multiple items" refers to two or more items. "At least one of the following (items)" or similar expressions refers to any combination of these items, including any combination of single items (items) or plural items (items). For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0140] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or NR and future sixth generation communication system, etc.

[0141] The part operated by the operator in various communication systems can be called the operator network. The operator network can also be called the PLMN network, which is a network established and operated by the government or an operator approved by the government for the purpose of providing land mobile communication services to the public. It is mainly a public network where mobile network operators (MNO) provide mobile broadband access services to users. The operator network or PLMN network described in the embodiment of the present application can be a network that meets the requirements of the third generation partnership project (3rd generation partnership project, 3GPP) standards, referred to as the 3GPP network. Usually, the 3GPP network is operated by an operator, including but not limited to the fifth generation mobile communication (5th-generation, 5G) network (referred to as 5G network), the fourth generation mobile communication (4th-generation, 4G) network (referred to as 4G network) or the third generation mobile communication technology (3rd-generation, 3G) network (referred to as 3G network). It also includes the future 6G network. For the convenience of description, the operator network (such as the mobile network operator (mobile network operator, MNO) network) will be used as an example in the embodiment of the present application.

[0142] In order to facilitate understanding of the embodiments of this application, some application scenarios of this solution are introduced. Figure 1a , Figure 1a A schematic diagram of an application scenario proposed in an embodiment of the present application. In an optional implementation, the transmitting end involved in the embodiment of the present application may be a network device, and the receiving end may be a terminal device. In another optional implementation, the transmitting end involved in the embodiment of the present application may be a terminal device, and the receiving end may be a network device.

[0143] See also Figure 1b , Figure 1b This is another application scenario diagram proposed by the embodiment of the present application. In another optional implementation, the transmitting end involved in the embodiment of the present application may be a terminal device, and the receiving end may be another terminal device that establishes a communication connection with the transmitting end.

[0144] In the embodiments of the present application, the terminal device may also be referred to as user equipment (UE). The terminal device involved in the embodiments of the present application is a device with wireless transceiver functions, which can communicate with one or more core networks (CN) via the access network device in the network device. The terminal device may also be referred to as an access terminal, terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless network equipment, user agent or user device, etc. The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a smart phone, a mobile phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other device connected to a wireless modem, a vehicle-mounted device, a wearable device, an unmanned aerial vehicle device or an Internet of Things, a terminal in the Internet of Vehicles, a terminal of any form in the fifth generation mobile communication (5G) network and future networks, a relay user device or a terminal in a future evolved public land mobile communication network (PLMN), etc., wherein the relay user device can be, for example, a 5G residential gateway (RG). For example, the terminal device may be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application are not limited to this.

[0145] The network device can be regarded as a sub-network of the operator network, and is an implementation system between the service node and the terminal device in the operator network. To access the operator network, the terminal device first passes through the network device, and then can connect to the service node of the operator network through the network device. The network device in the embodiment of the present application is a device that provides wireless communication functions for the terminal device, and can also be called a (radio) access network ((R)AN). Network equipment includes, but is not limited to: next generation node base station (gNB) in 5G system, evolved node B (eNB) in long term evolution (LTE), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved node B, or home node B, HNB), base band unit (BBU), transmission point (TRP), transmitting point (TP), small base station equipment (pico), mobile switching center, or network equipment in future networks, etc. In systems using different wireless access technologies, the names of devices with access network equipment functions may be different.

[0146] A channel monitoring method provided in the present application can be applied to various communication systems, for example, it can be the Internet of Things (IoT), narrowband Internet of Things (NB-IoT), long term evolution (LTE), or the fifth generation (5G) communication system, or a hybrid architecture of LTE and 5G, or a 5G new radio (NR) system, and new communication systems that will emerge in the future development of communication. The 5G communication system of the present application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (SA) 5G communication system. The communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.

[0147] In addition, the embodiments of the present application may also be applicable to other future-oriented communication technologies, such as 6G, etc. The network architecture and service scenarios described in this application are intended to more clearly illustrate the technical solutions of this application, and do not constitute a limitation on the technical solutions provided by this application. It is known to those skilled in the art that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by this application are also applicable to similar technical problems.

[0148] Figure 2 Schematic diagram of the hardware structure of the communication device in the embodiment of the present application. The communication device may be a possible implementation of the network device or terminal device in the embodiment of the present application. Figure 2 As shown, the communication device at least includes a processor 204, a memory 203, and a transceiver 202, and the memory 203 is further used to store instructions 2031 and data 2032. Optionally, the communication device may also include an antenna 206, an I / O (input / output, Input / Output) interface 210 and a bus 212. The transceiver 202 further includes a transmitter 2021 and a receiver 2022. In addition, the processor 204, the transceiver 202, the memory 203 and the I / O interface 210 are connected to each other through the bus 212, and the antenna 206 is connected to the transceiver 202.

[0149] The processor 204 may be a general-purpose processor, such as but not limited to a central processing unit (CPU), or a dedicated processor, such as but not limited to a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array (FPGA). The processor 204 may also be a neural processing unit (NPU). In addition, the processor 204 may also be a combination of multiple processors. In particular, in the technical solution provided in the embodiment of the present application, the processor 204 may be used to execute the relevant steps of the communication method based on the common beam in the subsequent method embodiment. The processor 204 may be a processor specially designed to perform the above steps and / or operations, or it may be a processor that performs the above steps and / or operations by reading and executing the instructions 2031 stored in the memory 203. The processor 204 may need to use data 2032 in the process of performing the above steps and / or operations.

[0150] The transceiver 202 includes a transmitter 2021 and a receiver 2022. In an optional implementation, the transmitter 2021 is used to send a signal through the antenna 206. The receiver 2022 is used to receive a signal through at least one of the antennas 206. In particular, in the technical solution provided in the embodiment of the present application, the transmitter 2021 can be specifically used to perform, through at least one of the antennas 206, for example, when the communication method based on a common beam in the subsequent method embodiment is applied to the network device or the terminal device, the operation performed by the receiving module or the sending module in the network device or the terminal device.

[0151] In the embodiment of the present application, the transceiver 202 is used to support the communication device to perform the aforementioned receiving function and sending function. The processor with processing function is regarded as the processor 204. The receiver 2022 can also be called an input port, a receiving circuit, etc., and the transmitter 2021 can be called a transmitter or a transmitting circuit, etc.

[0152] The processor 204 can be used to execute the instructions stored in the memory 203 to control the transceiver 202 to receive messages and / or send messages, and complete the function of the communication device in the method embodiment of the present application. As an implementation method, the function of the transceiver 202 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. In the embodiment of the present application, the transceiver 202 receiving a message can be understood as the transceiver 202 inputting a message, and the transceiver 202 sending a message can be understood as the transceiver 202 outputting a message.

[0153] The memory 203 may be various types of storage media, such as random access memory (RAM), read only memory (ROM), non-volatile RAM (NVRAM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), flash memory, optical memory, and registers, etc. The memory 203 is specifically used to store instructions 2031 and data 2032. The processor 204 can perform the steps and / or operations described in the embodiment of the method of the present application by reading and executing the instructions 2031 stored in the memory 203. The data 2032 may be used in the process of performing the operations and / or steps in the embodiment of the method of the present application.

[0154] Optionally, the communication device may further include an I / O interface 210, wherein the I / O interface 210 is used to receive instructions and / or data from a peripheral device, and output instructions and / or data to the peripheral device.

[0155] Below, some concepts involved in the embodiments of the present application are introduced.

[0156] (1) New Radio Unlicensed (NRU) wireless unlicensed frequency band.

[0157] As an auxiliary to the licensed frequency band, deploying the communication system (referred to as the system) on the shared licensed frequency band can not only improve the throughput of the communication system, but also solve the problem of spectrum resource shortage. In the context of 5G, the technologies deployed in the shared licensed frequency band are uniformly called wireless unlicensed frequency bands. Currently, the system that is agreed to work on the shared frequency band needs to support all or part of the following key technologies: listen before talk (LBT), transmit power control (TPC) and dynamic frequency selection (DFS).

[0158] Among them, the LBT mechanism means that the access device (such as UE) must first obtain the interference situation on the frequency band where the target channel is located before using the channel. Only when the interference level on the target frequency band channel is less than or equal to the preset threshold value can the channel be used. The TPC mechanism means that in order not to affect the normal communication of other access devices, the sending device (such as UE or gNB) working on the shared authorized frequency band cannot increase its own transmission power without limit. The DFS mechanism means that the system working on the shared authorized frequency band needs to avoid the frequency band where the high-priority system is located in a timely manner and dynamically switch to the frequency band with lower interference.

[0159] (2) Candidate SSB index / position

[0160] SSB is mainly composed of the primary synchronization signal (PSS), the secondary synchronization signal (SSS) and the physical broadcast channel (PBCH). In the time and frequency domain, it is a two-dimensional area spanning 4 orthogonal frequency division multiplexing symbols (OFDM) and 20 resource blocks (RBs) in the frequency domain.

[0161] Considering the existence of the LBT mechanism, the R16 protocol defines the concept of candidate SSB index / position (i.e., CandidateSSB index / position). In the embodiment of the present application, the candidate SSB index / position is used as It is used to send the actual SSB index (l). When the actual SSB index at the candidate SSB position satisfies the formula or , the UE considers that it corresponds to the same SSB index, that is, these SSB indexes satisfy the quasi co-location (QCL) relationship. For the convenience of description in the embodiment of the present application, the SSB having a QCL relationship with the first SSB is referred to as QCLed_SSB.

[0162] Represents the sequence of the demodulation reference signal (DMRS) mapped to the physical broadcast channel PBCH in the SSB. Q value, occupies 2 bits, and takes values ​​of {1, 2, 4, 8}. UE obtains it by demodulating the master information block (MIB) For ease of explanation and (l), assuming l = 4, length is 5 milliseconds (ms) QCLed_SSB schematic diagram is as follows Figure 3 As shown, Figure 3 Schematic diagram of QCLed_SSB in an embodiment of the present application.

[0163] Figure 3 In the first column, 0-19 means Each number represents the index of the transmitted SSB. 0-3 in the second column means that the 20 SSBs in the first column can be divided into 4 groups of SSBs with QCL relationships according to the QCL relationship. For example, the SSBs corresponding to the index numbers 0, 4, 8, 12, and 16 in the first column have a QCL relationship. For the UE, the same receiving beam can be used to receive SSB indexes with QCL relationships at different candidate positions.

[0164] (3) Quasi Co-Location (QCL) relationship.

[0165] The network device sends MIB information to the terminal device through PBCH. The MIB information is carried in the SSB. By demodulating the MIB information, the UE can obtain the location information of the control channel used to demodulate the system information block 1 / remaining minimum system information (SIB1 / RMSI). The control information can be defined as control resource set #0 (CORESET#0, Control Resource Set#0), which is transmitted through type 0-physical downlink control channel (type0-PDCCH, type0-Physical Downlink Control Channel). That is, the network device sends CORESET#0 to the terminal through type0-pdcch. For the UE, by searching CORESET#0 through search space #0 (searchspace#0), the information in SIB1 / RMSI can be obtained.

[0166] During the initial access process, the network device uses the same transmit beam to send out the SSB, the type0-PDCCH carrying CORESET#0 indicated by the MIB in the SSB, and the physical downlink shared channel (PDSCH) carrying SIB1 / RMSI. The UE can use the same receive beam to receive the PBCH channel, type0-PDCCH, and PDSCH. Therefore, the PBCH channel, type0-PDCCH, and PDSCH can be understood as having a quasi-co-location relationship.

[0167] The specific demodulation process is as follows:

[0168] The UE obtains Type0-PDCCH information for demodulating SIB1 / RMSI by demodulating "pdcch-ConfigSIB1" in the MIB. The information "pdcch-ConfigSIB1" includes the fields "controlResourceSetZero" and "searchSpaceZero".

[0169] The parameter "controlResourceSetZero" has a total of "0-15 values, each of which corresponds to an index in TS38.213table13-1~13-10 (v16.1.0). The UE obtains different indexes by demodulating the parameter "controlResourceSetZero", and further obtains the multiplexing mode (pattern) of CORESET#0 corresponding to the index with a QCL relationship, the number of RBs occupied in the frequency domain, the number of symbols occupied in the time domain, and the offset (offset) between the lowest subcarrier number of the CORESET#0 and the lowest subcarrier number of the SSB with a QCL relationship.

[0170] For example, as shown in Table 1:

[0171] Table 1

[0172]

[0173] The parameter "searchSpaceZero" indicates the search space position where the terminal searches for CORESET#0. The "0-15" values ​​corresponding to the configuration in the radio resource management (RRC, Radio Resource Signal) correspond to TS 38.213 (v16.3.0) table 13.11~13.15. The terminal obtains the specific time domain search space position, search space number and other information by looking up the corresponding "index" in Table 1 and the multiplexing pattern of PDCCH / PDSCH in the SSB and QCL relationship.

[0174] For example, as shown in Table 2:

[0175] Table 2

[0176]

[0177] (4) Multiplexing pattern.

[0178] The multiplexing pattern of SSB and QCL in PDCCH / PDSCH can also be expressed as the multiplexing pattern of SSB and QCL in CORESET#0 / PDSCH. For the three multiplexing patterns currently specified, please refer to Figure 4 , Figure 4 Schematic diagram of the multiplexing pattern in the embodiment of the present application.

[0179] Pattern 1: SSB and QCLed CORESET#0 / PDSCH exist in the form of time division multiplexing, and are mainly used in FR1 and FR2. In the embodiment of the present application, for the convenience of description, the CORESET#0 / PDSCH having a QCL relationship with the SSB is referred to as the SSB having a first QCL relationship with the CORESET#0 / PDSCH. The CORESET#0 can also be replaced by the PDCCH carrying the CORESET#0, that is, the SSB has a first QCL relationship with the PDCCH carrying the CORESET#0.

[0180] Pattern 2: The SSB and the QCLed PDSCH exist in the form of frequency division multiplexing. The SSB and the PDSCH have a first QCL relationship.

[0181] In pattern 3, the SSB and the QCLed CORESET#0 / PDSCH exist in the form of frequency division multiplexing. The SSB has a first QCL relationship with the CORESET#0 / PDSCH.

[0182] Among them, pattern2 and pattern3 are mainly used in FR2 and higher frequency bands.

[0183] See also Figure 5 , Figure 5The figure is a schematic diagram of PDCCH / SSB in multiplexing mode 2 in the prior art. Take the multiplexing mode of pattern2, in which the subcarrier spacing (SCS) of the PDCCH channel is 120 kHz (KHz) and the SCS of the SSB is 240 kHz. On the PDCCH channel, when LBT is successful on symbol #0, the PDCCH (for example, type0-PDCCH) on symbols #1 to #3 can be successfully sent. The type0-PDCCH transmitted on symbol #0 cannot be sent, and SSB#0, which has a QCL relationship with the type0-PDCCH sent on symbol #0, cannot be sent. The reason is that the PDCCH and SSB with a QCL relationship need to be sent at the same time.

[0184] Based on this, an embodiment of the present application proposes a channel monitoring method, wherein the terminal device UE determines the first monitoring time of the physical downlink control channel PDCCH according to the first synchronization signal block SSB, and the PDCCH is used to carry the control resource set coreset#0; the UE monitors the PDCCH at the first monitoring time; if the UE does not monitor the PDCCH, the UE determines the second monitoring time of the PDCCH according to the first SSB and the SSB having a quasi-co-location QCL relationship with the first SSB; the UE monitors the PDCCH at the second monitoring time. The network side does not need to send additional SSBs to reduce the delay of the network device in sending SSBs. And it is ensured that the terminal can successfully monitor the PDCCH.

[0185] It should be noted that, in the embodiment of the present application, the monitoring opportunity of PDCCH can also be referred to as the number of search spaces (searchSpace) of PDCCH.

[0186] The technical solution of the embodiment of the present application is described below in conjunction with the accompanying drawings. Figure 6 , Figure 6 Schematic diagram of a channel monitoring method in an embodiment of the present application. A channel monitoring method proposed in an embodiment of the present application includes:

[0187] 601. The terminal device determines a first monitoring time of PDCCH according to a first SSB.

[0188] In this embodiment, the terminal device determines the first monitoring time of the PDCCH based on the MIB information carried in the first SSB.

[0189] Optionally, the PDCCH may be type0-PDCCH.

[0190] Optionally, the PDCCH carries the control resource set CORESET#0.

[0191] In this embodiment, the subcarrier spacing SCS of the first SSB satisfies: 120 kilohertz KHz, 240 KHz, 480 KHz or 960 KHz; the SCS of the PDCCH satisfies: 120 kilohertz KHz, 240 KHz, 480 KHz or 960 KHz. Exemplarily, the SCS of the first SSB and the SCS of the PDCCH {(SCS of the first SSB), (SCS of the PDCCH)} satisfy: {240 KHz, 120 KHz}, {240 KHz, 480 KHz}, {480 KHz, 960 KHz}, {240 KHz, 240 KHz}, {960 KHz, 960 KHz} or {240 KHz, 960 KHz}, etc.

[0192] 602. When the terminal device fails to monitor the PDCCH at the first monitoring time, the terminal device determines the second monitoring time based on the first SSB and the SSB having a QCL relationship with the first SSB.

[0193] In this embodiment, when the terminal device does not monitor the PDCCH at the first monitoring time, the terminal device determines the second monitoring time of the PDCCH based on the first SSB and the SSB having a quasi-co-located QCL relationship with the first SSB. For the convenience of description in this embodiment of the application, the SSB having a QCL relationship with the first SSB is referred to as QCLed_SSB. The QCL relationship indicates that multiple SSBs on different candidate SSB indexes have the same index. For example Figure 3 In the first column, the SSBs corresponding to index numbers 0, 4, 8, 12 and 16 have a QCL relationship, so the SSB with index number 0 is used as the first SSB, and the SSBs with index numbers 4, 8, 12 and 16 are QCLed_SSBs.

[0194] The specific method for determining the second monitoring opportunity is as follows:

[0195] The second monitoring opportunity includes a target system frame number SFN c and target time slot number n c ,in,

[0196] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0197] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0198] The time slot position of the first SSB differs from the second listening opportunity by a time slot of 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0199] Specifically, the number of SSBs actually sent refers to the number of SSBs sent by the network device within a certain time window. Optionally, the time window may be a burst set window. The value of the burst set window is {0.5 milliseconds, 1 millisecond, 2 milliseconds, 3 milliseconds, 4 milliseconds, 5 milliseconds}.

[0200] Optionally, the Q value can be Should The value can be any one of 1, 2, 4, 8, 16, 32, or 64. Indicated by the parameters "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the master information block MIB. When the value is 1, 2, 4, or 8, the Indicated by the parameter "Ssb-SubcarrierOffset" or "subCarrierSpacingCommon" in the master information block MIB. "Ssb-SubcarrierOffset" or "subCarrierSpacingCommon" occupies 1 bit respectively. When the value is 16, 32, or 64, the Indicated jointly by "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and "SearchSpaceZero".

[0201] The starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 of the next time slot;

[0202] Alternatively, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0203] The number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0204] When the number of PDCCHs to be monitored is greater than 1, the UE determines multiple second monitoring opportunities according to a first offset and a starting symbol index of the second monitoring opportunity, wherein the first offset is a time domain offset between adjacent PDCCHs in the time domain.

[0205] Specifically, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the main information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0206] The first offset, the starting symbol index of the second monitoring opportunity and the number of PDCCHs can be configured by the network device through a MIB message, for example, 1, 2, 3 or all 4 bits of the 4 bits of "SearchSpaceZero" in the parameter "PDCCH-ConfigSIB1" in the MIB.

[0207] Alternatively, the first offset, the starting symbol index of the second monitoring opportunity and the number of PDCCHs are pre-configured in the terminal device and the network device and are fixed values.

[0208] Alternatively, the terminal device determines the first offset and the starting symbol index of the second listening opportunity by calculation. Exemplarily, the calculation method is as follows pseudo code (or condition):

[0209]

[0210] n c =nn ssb，i .".in, is the ratio of the SCS of the PDCCH to the SCS of the SSB, "length of aframe" is the frame length, usually 10 milliseconds, and n c Indicates the time slot offset of PDCCH relative to SSB.

[0211] Alternatively, a table of associations between the first offset and the start symbol index of the second listening opportunity is maintained in the terminal device. The terminal device determines the first offset and the start symbol index of the second listening opportunity corresponding to the index in the table according to the index configured by the network device. Exemplarily, the table is shown in Table 3:

[0212] Table 3

[0213]

[0214] It should be noted that, depending on the SSB pattern, or the difference between the SCS of the PDCCH and the SCS of the SSB, the terminal device determines the second listening time in different ways, which will be described in detail in subsequent embodiments. SSB pattern refers to the position of the SSB at the symbol level. In different SSB patterns, the number of SSBs contained in a time slot is also different.

[0215] 603. The terminal device monitors the PDCCH at a second monitoring opportunity.

[0216] 604. The terminal device determines the time domain position of the PDSCH according to the PDCCH.

[0217] In this embodiment, after the terminal device monitors the PDCCH at the second monitoring opportunity, the terminal device can also determine the time domain position of the PDSCH according to the PDCCH. Specifically, the terminal device determines the time domain position of the PDSCH indicated by the DCI according to the DCI in the PDCCH. The terminal device determines the starting symbol position S of the target PDSCH, the number of symbols L occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located according to the DCI in the PDCCH.

[0218] Optionally, within a certain time window, PDSCHs at different time domain positions are distinguished by redundancy versions (RV), that is, the transmission contents of PDSCHs at different time domain positions are the same, but the redundancy versions are different.

[0219] Optionally, the time window may be a burst set window, or may be the symbol length occupied in the time domain by the first SSB under SCS 120KHz / 240KHz relative to the PDCCH with a QCL relationship of SCS 480KHz / 960KHz, and its value is equal to the length of 16 symbols. The PDCCH carries CORESET#0.

[0220] Specifically, the UE determines the time domain position of a target physical downlink shared channel PDSCH according to the PDCCH, and the target PDSCH carries system information block SIB1 / remaining minimum system information RMSI.

[0221] In this embodiment, the PDCCH corresponds to a plurality of different time domain positions; the target PDSCH corresponds to a plurality of different time domain positions; one PDCCH indicates a time domain position of the target PDSCH, or one PDCCH indicates a plurality of time domain positions of the target PDSCH. It should be noted that it can also be called: one PDCCH schedules one or more PDSCHs.

[0222] The UE determining the time domain position of the target PDSCH according to the PDCCH includes:

[0223] The UE determines, according to the PDCCH, the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0224] In an optional implementation, S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0225] In another optional implementation, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0226] In another optional implementation, S and L values ​​satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L value satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 value satisfies one or more of {0, 1, M / 2, M / 2+1};

[0227] In another optional implementation, S takes a value that satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and K0 takes a value that satisfies one or more of {0, 1, M / 2, M / 2+1};

[0228] In another optional implementation, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0229] In another optional implementation, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0230] In another optional implementation, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}. M is the number of SSBs actually sent or the Q value.

[0231] Optionally, the number of target PDSCHs and the time domain information of the target PDSCH, the UE obtains according to a newly added field “Time locations of PDSCHs for SIB1 / RMSI” in the downlink control information DCI carried in the PDCCH, the field “Time locations of PDSCHs for SIB1 / RMSI” occupies {0, 1, …, X} bits, and X is any one of {0, 1, 2, 3, 4};

[0232] Alternatively, the UE obtains the number of the target PDSCHs and the time domain information of the target PDSCH according to the field “Time domain resource assignment” in the DCI carried in the PDCCH, and the number of bits occupied by the field “Time domain resource assignment” is extended to more than 4 bits;

[0233] Optionally, the DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0234] In the embodiment of the present application, the network side does not need to send additional SSBs to reduce the delay of the network device in sending SSBs. The terminal determines the monitoring time (second monitoring time) of the PDCCH according to the SSB associated with the PDCCH in various ways. In the case where the PDCCH cannot be monitored at the first monitoring time, the PDCCH is monitored at the second monitoring time to ensure that the terminal can successfully monitor the PDCCH.

[0235] Below, in Figure 6 On the basis of the illustrated embodiment, the above embodiment is further described in combination with different SSB patterns and SCS.

[0236] (1) Multiplexing mode 2 (pattern 2).

[0237] 1. When the SCS of the first SSB and the SCS of the PDCCH satisfy {240 KHz, 120 KHz}. For example, the SSB pattern at 240 KHz is any one of {8, 12, 16, 20, 32, 36, 40, 44} + 56·n, where n = 0, 1, 2, 3, 5, 6, 7, 8.

[0238] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0239] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，iis a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0240] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0241] The time slot position of the first SSB differs from the second listening opportunity by 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value. The time window of the SSB actually sent may be a burst set window, and the value of the burst set window is {0.5ms, 1ms, 2ms, 3ms, 4ms, 5ms}.

[0242] Exemplarily, please refer to Table 4 and Table 5. The PDCCH monitoring opportunity in Table 4 and Table 5 refers to the second monitoring opportunity, and the starting symbol index refers to the starting symbol index of the second monitoring opportunity.

[0243] Table 4

[0244]

[0245]

[0246] Table 5

[0247]

[0248] It should be noted that when the SCS of the first SSB and the SCS of the PDCCH are {480KHz, 240KHz} or {960KHz, 480KHz}, the terminal device can also determine the second monitoring time through the above Tables 3 and 4.

[0249] 2. When the SCS of the first SSB satisfies 240KHz, 480KHz, 960KHz; the SCS of the PDCCH satisfies 240KHz, 480KHz, 960KHz. At this time, a time slot contains two SSBs, and the interval between the SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0,1,…,31 or {2,8}+14·n, n=0,1,…,63.

[0250] When the SCS of the first SSB and the SCS of the PDCCH satisfy {240KHz, 480KHz} or {480KHz, 960KHz} or {240KHz, 960KHz} or {120KHz, 480KHz}:

[0251] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0252] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0253] n c =n ssb，i , or, n c =n QCLed_ssb，i , where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0254] The time slot position of the first SSB differs from the second listening opportunity by 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value. The time window of the SSB actually sent may be a burst set window, and the value of the burst set window is {0.5ms, 1ms, 2ms, 3ms, 4ms, 5ms}.

[0255] Exemplarily, please refer to Table 6, the PDCCH monitoring opportunity in Table 6 refers to the second monitoring opportunity, and the starting symbol index refers to the starting symbol index of the second monitoring opportunity.

[0256] Table 6

[0257]

[0258]

[0259] Exemplarily, when the SCS of the first SSB and the SCS of the PDCCH satisfy {240KHz, 480KHz} or {480KHz, 960KHz}, the starting symbol index of the second monitoring opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 in the next time slot; the number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 4}.

[0260] Exemplarily, when the SCS of the first SSB and the SCS of the PDCCH satisfy {240KHz, 960KHz} or {120KHz, 480KHz}, the starting symbol index of the second monitoring opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 in the next time slot; the number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 4, 8}.

[0261] 3. The time domain position of PDSCH.

[0262] In different multiplexing modes, the time domain position of the PDSCH is different. Therefore, the following describes how the terminal determines the time domain position of the PDSCH (the PDSCH is the target PDSCH in the embodiment of the present application) in the case of pattern 2.

[0263] (A) When the SCS of the first SSB and the SCS of PDCCH satisfy {240KHz, 480KHz} or {480KHz, 960KHz}.

[0264] (A.1) When the SCS of the first SSB and the SCS of the PDCCH satisfy {240 KHz, 480 KHz}, the SSB pattern is {8, 12, 16, 20, 32, 36, 40, 44} + 56·n, where n = 0, 1, 2, 3, 5, 6, 7, 8.

[0265] The values ​​of K0, S and L are: S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8}, K0 takes the value 0, 1 or (M / 2). M is the number of SSBs actually sent or the Q value, the starting symbol position S of the target PDSCH, the number of symbols L occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0266] (A.2) The SCS of the first SSB and the SCS of the PDCCH satisfy 240KHz and 480KHz.

[0267] The SSB pattern satisfies: when two SSBs are contained in a time slot and the interval between SSBs is greater than or equal to 2 symbols, the maximum number of SSBs that can be sent or the maximum number of candidate positions for sending SSBs in a time window is 64 or 128. For example: the SSB pattern is {2,8}+14·n, n=0,1,…,31 or: the SSB pattern is {2,8}+14·n, n=0,1,…,63. The values ​​of K0, S and L are: S is any one of the set {2,3,4,5,6,7,8,9,10}, L is any one of the set {2,3,4,5,6,7,8}, and K0 is 0, 1 or (M / 2).

[0268] The “time window” here may represent a burst set window, and its value may be {0.5ms, 1ms, 2ms, 3ms, 4ms, 5ms}.

[0269] (B) When the SCS of the first SSB and the SCS of PDCCH satisfy {120KHz, 480KHz} or {240KHz, 960KHz}.

[0270] (B.1), SSB pattern is {8,12,16,20,32,36,40,44}+56·n, where n=0,1,2,3,5,6,7,8. S takes a value that satisfies any one of the set {2,3,4,5,6,7,8,9,10}, L takes a value that satisfies any one of the set {2,3,4,5,6,7,8}, and K0 takes a value of 0, 1, or (M / 2). M is the number of SSBs actually sent or the Q value. M is the number of SSBs actually sent or the Q value, the starting symbol position S of the target PDSCH, the number of symbols L occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0271] (B.2) A time slot contains two SSBs, and the interval between SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0,1,…,31 or {2,8}+14·n, n=0,1,…,63.

[0272] The values ​​of K0, S and L can be the following combinations: S is any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, L is any one of {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, K0 is 0, 1, M / 2 or M / 2+1. M is the number of SSBs actually sent or the Q value.

[0273] For example, when K0=0 or M / 2, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}; when K0=1 or M / 2+1, the value of S satisfies any one of the set {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}.

[0274] 4. PDCCH indicates PDSCH.

[0275] In the embodiment of the present application, downlink control information (DCI) transmitted in one PDCCH may indicate the time domain position of one target PDSCH. DCI transmitted in one PDCCH may also indicate the time domain positions of multiple target PDSCHs.

[0276] Specifically, there is a one-to-one relationship or a one-to-many relationship between the number of PDCCHs carrying coreset#0 and the number of PDSCHs indicated by the DCI transmitted in the PDCCH.

[0277] Optionally, under different multiplexing modes (patterns), within a certain time length window, PDSCHs located at different time domain positions are distinguished by redundant versions (RV, Redundancy Version). That is, the transmission content of the PDSCH transmitted at different time domain positions is the same, but the redundant versions of the PDSCH transmitted at different time domain positions are different. The length of the time window is related to the SCS of the first SSB and the SCS of the PDCCH. For example, the length of the time window can be the symbol length occupied by the SCS of the first SSB compared to the SCS of the PDCCH in the time domain. For example, the length of the time window can be 16 symbols. For example, please refer to Table 7.

[0278] Table 7

[0279] PDSCH index number PDSCH time domain position (symbol) Redundant version number 1 1-2 1 2 5-6 2 3 9-10 3

[0280] The following describes a PDCCH indicating the time domain position of a target PDSCH (ie, a PDCCH corresponds to the time domain position of a target PDSCH) and a PDCCH indicating the time domain positions of multiple target PDSCHs (ie, a PDCCH corresponds to the time domain positions of multiple target PDSCHs).

[0281] (A) A PDCCH indicates the time domain position of a target PDSCH.

[0282] Specifically, the DCI carried (also referred to as transmitted or carried) in a PDCCH only indicates a PDSCH carrying SIB1 / RMSI. This PDSCH is referred to as a target PDSCH in the embodiment of the present application.

[0283] Optionally, the UE may also obtain the first offset and the starting symbol index of the second monitoring opportunity in other ways. Specifically as follows:

[0284] (1) The first offset and the starting symbol index of the second listening opportunity are configured by the network device to the terminal device through MIB information. The UE obtains the information through MIB information, for example, using 1, 2, 3 or all 4 bits of the 4 bits of "SearchSpaceZero" in the parameter "PDCCH-ConfigSIB1" in the MIB to represent the first offset and the starting symbol index of the second listening opportunity.

[0285] (2) The first offset and / or the starting symbol index of the second listening opportunity are preconfigured in the network device and the terminal device. The terminal device can determine the time domain position of the target PDSCH based on the preconfigured first offset and the starting symbol index of the second listening opportunity. The terminal device can also determine the time domain position of the target PDSCH based on the preconfigured first offset and the calculated starting symbol index of the second listening opportunity. Specifically, the calculation method of the starting symbol index of the second listening opportunity is as shown in the aforementioned embodiment, such as a pseudo code or formula, and will not be repeated here.

[0286] (3) The first offset and / or the starting symbol index of the second listening opportunity are preconfigured in the network device and the terminal device. The terminal device determines the first offset and the starting symbol index of the second listening opportunity to be used from the preconfigured information according to the indication information of the network device. Specifically, as shown in the above Table 3, it is not repeated here. The terminal device determines the first offset and the starting symbol index of the second listening opportunity corresponding to the index in the table according to the index configured by the network device.

[0287] Exemplarily, the network device can determine the first offset and the starting symbol index of the second listening opportunity through the bits in the "SearchSpaceZero" parameter. For example: Taking Table 3 as an example, when the bits in the "SearchSpaceZero" parameter are "01", the corresponding index is 1. When the bits in the "SearchSpaceZero" parameter are "11", the corresponding index is 2. When the bits in the "SearchSpaceZero" parameter are "11", the corresponding index is 3. And so on, no limitation is made here.

[0288] Exemplarily, the SCS of the first SSB and the SCS of the PDCCH satisfy {120KHz, 120KHz} or {240KHz, 240KHz}. Then the SSB pattern is {8, 12, 16, 20, 32, 36, 40, 44} + 56·n, n = 0, 1, 2, 3, 5, 6, 7, 8. The value of K0 satisfies one or more of the set {-(M / 2)-1, -(M / 2), -(M / 2)+1, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of {0, 1, 2, 3, 4, 5, 6, 7, 8}. M is the number of SSBs actually sent or the Q value, for example, M=36.

[0289] Exemplarily, the SCS of the first SSB and the SCS of the PDCCH satisfy {120KHz, 120KHz} or {240KHz, 240KHz}. Then the SSB pattern satisfies: At this time, two SSBs are contained in a time slot, and the interval between SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0, 1,…, 31 or {2,8}+14·n, n=0, 1,…, 63. The value of K0 satisfies one or more of the set {0, M / 2}. M is the number of SSBs actually sent or the Q value, for example, M=32. The value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}.

[0290] (B) One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0291] Specifically, a DCI carried (also referred to as transmitted, or carried) in a PDCCH indicates multiple PDSCHs carrying SIB1 / RMSI. Therefore, within a certain time window, only one DCI can be used to indicate multiple PDSCHs (i.e., target PDSCHs). Optionally, the symbol length occupied by the DCI can be 2 symbol positions, 3 symbol positions, or 4 or more symbol positions, which is not limited here.

[0292] Exemplarily, the SCS of the first SSB and the SCS of the PDCCH satisfy {120KHz, 120KHz} or {240KHz, 240KHz}. The SSB pattern is {8, 12, 16, 20, 32, 36, 40, 44} + 56·n, n = 0, 1, 2, 3, 5, 6, 7, 8. The value of K0 satisfies one or more of the set {-(M / 2)-1, -(M / 2), -(M / 2)+1, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, M is the number of SSBs actually sent or the Q value, M = 36. The value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of {0, 1, 2, 3, 4, 5, 6, 7, 8}.

[0293] Exemplarily, the SCS of the first SSB and the SCS of the PDCCH satisfy {120KHz, 120KHz} or {240KHz, 240KHz}. Then the SSB pattern satisfies: At this time, two SSBs are contained in a time slot, and the interval between SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0, 1,…, 31 or {2,8}+14·n, n=0, 1,…, 63. The value of K0 satisfies one or more of the set {0, M / 2}. M is the number of SSBs actually sent or the Q value, for example, M=32. The value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}.

[0294] (2) Multiplexing mode 3 (pattern 3).

[0295] 1. For a communication system operating in an authorized frequency band, the communication system includes terminal equipment and network equipment.

[0296] (A) When the SCS of the first SSB is the same as the SCS of the PDCCH, that is, {240KHz, 240KHz}, {480KHz, 480KHz} or {960KHz, 960KHz}.

[0297] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0298] SFN c =SFN ssb，i , the SFN ssb，i is the system frame number of the first SSB;

[0299] n c =n ssb，i Among them, the n ssb，i The time slot number i of the first SSB represents the same index of multiple SSBs having a QCL relationship.

[0300] (B) When the SCS of the first SSB is different from the SCS of the PDCCH, that is, {120KHz, 480KHz} or {240KHz, 960KHz} is satisfied, the SSB pattern satisfies any two of the following settings:

[0301] The SSB pattern is {8, 12, 16, 20, 32, 36, 40, 44}+56·n, where n=0, 1, 2, 3, 5, 6, 7, 8.

[0302] Alternatively, two SSBs are included in a time slot, and the interval between SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0,1,…,31 or {2,8}+14·n, n=0,1,…,63.

[0303] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0304] SFN c =SFN ssb，i , the SFN ssb，i is the system frame number of the first SSB;

[0305] n c =n ssb，i , or, n c =n ssb，i +1, where n ssb，i is the time slot number of the first SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0306] The start symbol index of the second listening opportunity includes any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.

[0307] Alternatively, the terminal device determines the target system frame number SFN by calculation c and target time slot number n c Exemplarily, the calculation method is as follows pseudo code (or condition):

[0308]

[0309] n c =nn ssb，i ".in, is the ratio of the SCS of the PDCCH to the SCS of the SSB, "length of aframe" is the frame length, usually 10 milliseconds, and n c Indicates the time slot offset of PDCCH relative to SSB.

[0310] The start symbol index of the second listening opportunity includes any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.

[0311] 2. For communication systems operating in unlicensed frequency bands, the communication system includes terminal equipment and network equipment.

[0312] (A) When the SCS of the first SSB is the same as the SCS of the PDCCH, that is, {240KHz, 240KHz}, {480KHz, 480KHz} or {960KHz, 960KHz}.

[0313] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0314] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0315] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0316] (B) When the SCS of the first SSB is different from the SCS of the PDCCH, that is, {120KHz, 480KHz} or {240KHz, 960KHz} is satisfied, the SSB pattern satisfies any two of the following settings:

[0317] For the SSB pattern of 120kHz, the SSB pattern is: {4, 8, 16, 20}+28*n, n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, for the SSB pattern of 240kHz, it is {8, 12, 16, 20, 32, 36, 40, 44}+56·n, n=0, 1, 2, 3, 5, 6, 7, 8.

[0318] Alternatively, two SSBs are included in a time slot, and the interval between SSBs in a time slot (in the time domain) is greater than or equal to 2 symbols. In a time window (such as a burst set window), the maximum number of SSBs that can be sent (or the number of candidate SSB positions for sending SSBs is 64 or 128). Exemplarily, the SSB pattern is {2,8}+14·n, n=0,1,…,31 or {2,8}+14·n, n=0,1,…,63.

[0319] The start symbol index of the second listening opportunity includes any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.

[0320] The UE determines the second monitoring opportunity by the following method, wherein the second monitoring opportunity includes the target system frame number SFN c and target time slot number n c ,in,

[0321] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0322] n c =n ssb，i , or, n c =n QCLed_ssb，i , where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB, and i represents the same index of multiple SSBs with QCL relationship.

[0323] The start symbol index of the second listening opportunity includes any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.

[0324] Alternatively, the terminal device determines the target system frame number SFN by calculation c and target time slot number n c Exemplarily, the calculation method is as follows pseudo code (or condition):

[0325]

[0326] n c =nn ssb，i .".in, is the ratio of the SCS of the PDCCH to the SCS of the SSB, "length of aframe" is the frame length, usually 10 milliseconds, and n c Indicates the time slot offset of PDCCH relative to SSB, "candidate_startsymbol of SSB i " is the starting position of the candidate SSB. In the embodiment of the present application, the starting position of the candidate SSB includes 128 or 256 candidate positions, wherein the number of SSBs actually sent may be 4, 8 or 64.

[0327] The start symbol index of the second listening opportunity includes any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.

[0328] 3. The time domain position of PDSCH.

[0329] In different multiplexing modes, the time domain position of the PDSCH is different. Therefore, the following describes how the terminal determines the PDSCH (ie, the time domain position of the target PDSCH in the embodiment of the present application) in the case of pattern 3.

[0330] (A) When the SCS of the first SSB and the SCS of the PDCCH satisfy {240KHz, 240KHz}, {480KHz, 480KHz} or {960KHz, 960KHz}, K0 takes the value of 0 or M / 2, where M is the number of SSBs actually sent or the Q value.

[0331] (B) The SCS of the first SSB and the SCS of the PDCCH satisfy {120KHz, 480KHz} or {240KHz, 960KHz}, and the SSBpattern is {8,12,16,20,32,36,40,44}+56·n, where n=0,1,2,3,5,6,7,8.

[0332] The value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, and the value of K0 is 0, 1, (M / 2) or (M / 2+1). M is the number of SSBs actually sent or the Q value, the starting symbol position S of the target PDSCH, the number of symbols L occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0333] Exemplarily, M=32 or 36.

[0334] (C) The SCS of the first SSB and the SCS of PDCCH satisfy {120KHz, 480KHz} or {240KHz, 960KHz}.

[0335] The SSB pattern satisfies: when two SSBs are included in a time slot and the interval between SSBs is greater than or equal to 2 symbols, the maximum number of SSBs that can be sent or the maximum number of candidate positions for sending SSBs in a time window is 64 or 128. For example: the SSB pattern is {2,8}+14·n, n=0,1,…,31 or: the SSB pattern is {2,8}+14·n, n=0,1,…,63.

[0336] The values ​​of K0, S and L are: S is any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, L is any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, K0 is 0, 1, M / 2 or M / 2+1. M is the number of SSBs actually sent or the Q value, M=32. For example, when K0=0 or M / 2, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}; when K0=1 or M / 2+1, the value of S satisfies any one of the set {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, and the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}. The "time window" here can represent the burst set window, and its value is {0.5ms, 1ms, 2ms, 3ms, 4ms, 5ms}.

[0337] 4. PDCCH indicates PDSCH.

[0338] In the embodiment of the present application, the downlink control information (DCI) transmitted in a PDCCH may indicate the time domain position of a target PDSCH. The DCI transmitted in a PDCCH may also indicate the time domain positions of multiple target PDSCHs. The target PDSCH carries the system information block SIB1 / remaining minimum system information RMSI.

[0339] Specifically, there is a one-to-one relationship or a one-to-many relationship between the number of PDCCHs carrying coreset#0 and the number of PDSCHs indicated by the DCI transmitted in the PDCCH.

[0340] The following describes a PDCCH indicating the time domain position of a target PDSCH (ie, a PDCCH corresponds to the time domain position of a target PDSCH) and a PDCCH indicating the time domain positions of multiple target PDSCHs (ie, a PDCCH corresponds to the time domain positions of multiple target PDSCHs).

[0341] (A) A PDCCH indicates the time domain position of a target PDSCH.

[0342] Specifically, the DCI carried (also called transmission, or bearing) in a PDCCH only indicates a PDSCH carrying SIB1 / RMSI. This PDSCH is referred to as the target PDSCH in the embodiment of the present application. At this time, the value of K0 satisfies one or more of the set {-(M / 2)-1, -(M / 2), -(M / 2)+1, -1, 0, 1, M / 2-1, M / 2, M / 2+1}. Among them, M is the number of SSBs actually sent or the Q value, for example, M=36 or 32.

[0343] For example, Figure 7 For example, Figure 7The schematic diagram of the time domain position of PDCCH and PDSCH in the embodiment of the present application. Take the SCS of the first SSB and the SCS of PDCCH satisfying {240KHz, 960KHz} as an example. The UE searches for PDCCH at 3 time domain positions, that is, the UE has three search space positions, and the position of each search space in the time domain is symbol #4~#5 (defined as the DCI carried by PDCCH in this time domain position as DCI(1)), symbol #10~#11 (defined as the DCI carried by PDCCH in this time domain position as DCI(2)) and the next time slot symbol #0~#1 (defined as the DCI carried by PDCCH in this time domain position as DCI(3)). The starting symbol position S of the PDSCH indicated by DCI (1) is 6, the number of symbols L occupied by the target PDSCH in the time domain is 4, and K0=0; the starting symbol position S of the PDSCH indicated by DCI (2) is 12, the number of symbols L occupied by the target PDSCH in the time domain is 2, and K0=0; the starting symbol position S of the PDSCH indicated by DCI (3) is 2, the number of symbols L occupied by the target PDSCH in the time domain is 3, and K0=1.

[0344] Optionally, the UE may also determine the starting symbol index of the second listening opportunity through other methods described in the embodiments of the present application (such as pseudocode or formula, etc.), where the starting symbol index of the second listening opportunity is the starting symbol position of DCI (1).

[0345] The time domain offset between the adjacent PDCCHs in the time domain is called the first offset. The first offset is also called the time domain offset between different DCIs that are adjacent in the time domain. For example, the first offset includes: the time domain offset between DCI (1) and DCI (2), and the time domain offset between DCI (2) and DCI (3).

[0346] Optionally, the UE may also obtain the first offset and the starting symbol index of the second monitoring opportunity in other ways. Specifically as follows:

[0347] (1) The first offset and the starting symbol index of the second listening opportunity are configured by the network device to the terminal device through MIB information. The UE obtains the information through MIB information, for example, using 1, 2, 3 or all 4 bits of the 4 bits of "SearchSpaceZero" in the parameter "PDCCH-ConfigSIB1" in the MIB to represent the first offset and the starting symbol index of the second listening opportunity.

[0348] (2) The first offset and / or the starting symbol index of the second listening opportunity are preconfigured in the network device and the terminal device. The terminal device can determine the time domain position of the target PDSCH based on the preconfigured first offset and the starting symbol index of the second listening opportunity. The terminal device can also determine the time domain position of the target PDSCH based on the preconfigured first offset and the calculated starting symbol index of the second listening opportunity. Specifically, the calculation method of the starting symbol index of the second listening opportunity is as shown in the above-mentioned embodiment, such as pseudo code or formula, and will not be repeated here. For example: the terminal device determines the time domain position of DCI (1) based on the preconfigured information. And determines the time domain position of DCI (2) and the time domain position of DCI (3) based on the first offset.

[0349] (3) The first offset and / or the starting symbol index of the second listening opportunity are preconfigured in the network device and the terminal device. The terminal device determines the first offset and the starting symbol index of the second listening opportunity to be used from the preconfigured information according to the indication information of the network device. Specifically, as shown in the above Table 3, it is not repeated here. The terminal device determines the first offset and the starting symbol index of the second listening opportunity corresponding to the index in the table according to the index configured by the network device.

[0350] Exemplarily, the network device can determine the first offset and the starting symbol index of the second listening opportunity through the bits in the "SearchSpaceZero" parameter. For example: Taking Table 3 as an example, when the bits in the "SearchSpaceZero" parameter are "01", the corresponding index is 1. When the bits in the "SearchSpaceZero" parameter are "11", the corresponding index is 2. When the bits in the "SearchSpaceZero" parameter are "11", the corresponding index is 3. And so on, no limitation is made here.

[0351] (B) One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0352] Specifically, a DCI carried (also referred to as transmitted, or carried) in a PDCCH indicates multiple PDSCHs carrying SIB1 / RMSI. Therefore, within a certain time window, only one DCI can be used to indicate multiple PDSCHs (i.e., target PDSCHs). Optionally, the symbol length occupied by the DCI can be 2 symbol positions, 3 symbol positions, or 4 or more symbol positions, which is not limited here.

[0353] Specifically, the UE determines the time domain position of the target PDSCH according to the PDCCH, including:

[0354] The UE obtains the number of the target PDSCHs and the time domain information of the target PDSCH according to a newly added field “Time locations of PDSCHs for SIB1 / RMSI” in the downlink control information DCI carried in the PDCCH, where the field “Time locations of PDSCHs for SIB1 / RMSI” occupies {0, 1, …, X} bits, and X is any one of {0, 1, 2, 3, 4};

[0355] Alternatively, according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, the number of the target PDSCHs and the time domain information of the target PDSCHs are obtained, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0356] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0357] by Figure 8 For example, Figure 8 This is another time domain position diagram of PDCCH and PDSCH in the embodiment of the present application. The starting symbol position of the second monitoring opportunity is symbol #4. The DCI in the PDCCH indicates three time domain positions for monitoring the target PDSCH. That is, the values ​​of S and L of PDSCH are (6, 4), (12, 2) and (2, 3), respectively, and K0 = 0 or 1. For ease of understanding, please refer to Table 8.

[0358] Table 8

[0359]

[0360] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. It is understandable that in order to realize the above functions, the terminal device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the modules and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0361] The embodiment of the present application can divide the functional modules of the terminal device according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0362] The following is a detailed description of the terminal device in this application. Fig. 9 , Fig. 9 This is a schematic diagram of an embodiment of a terminal device in an embodiment of the present application. The terminal device 900 includes:

[0363] A processing module 901 is used to determine a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, where the PDCCH is used to carry a control resource set coreset#0;

[0364] The processing module 901 is further configured to determine, by the UE, a second monitoring timing of the PDCCH according to the first SSB and an SSB having a quasi co-location QCL relationship with the first SSB, if the transceiver module 902 fails to monitor the PDCCH at the first monitoring timing;

[0365] The transceiver module 902 is further configured to monitor the PDCCH at the second monitoring opportunity.

[0366] In some optional embodiments of the present application, the second monitoring opportunity includes a target system frame number SFN c and target time slot number n c ,in,

[0367] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0368] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or nc =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB.

[0369] In some optional embodiments of the present application, the time slot position of the first SSB differs from the second listening opportunity by a time slot of 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0370] In some optional embodiments of the present application, the Q value is The value can be any one of 1, 2, 4, 8, 16, 32, or 64.

[0371] In some optional embodiments of the present application, Indicated by parameters "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

[0372] In some optional embodiments of the present application, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 in the next time slot;

[0373] Alternatively, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0374] The number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0375] In some optional embodiments of the present application,

[0376] The processing module 901 is also used to determine multiple second listening opportunities according to the first offset and the starting symbol index of the second listening opportunity when the number of the PDCCHs is greater than 1; wherein the first offset is the time domain offset between the PDCCHs adjacent in the time domain.

[0377] In some optional embodiments of the present application, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the main information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0378] In some optional embodiments of the present application, after the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes:

[0379] The processing module 901 is further configured to determine a time domain position of a target physical downlink shared channel PDSCH according to the PDCCH, wherein the target PDSCH carries a system information block SIB1 / remaining minimum system information RMSI.

[0380] In some optional embodiments of the present application, the PDCCH corresponds to a plurality of different time domain positions;

[0381] The target PDSCH corresponds to a plurality of different time domain positions;

[0382] One of the PDCCHs indicates a time domain position of one of the target PDSCHs, or,

[0383] One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0384] In some optional embodiments of the present application, the UE determining the time domain position of the target PDSCH according to the PDCCH includes:

[0385] The UE determines, according to the PDCCH, the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0386] In some optional embodiments of the present application, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0387] Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0388] Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0389] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0390] Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0391] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0392] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

[0393] In some optional embodiments of the present application,

[0394] The processing module 901 is further configured to cause the UE to determine the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring opportunity.

[0395] In some optional embodiments of the present application,

[0396] The processing module 901 is further used to obtain the number of the target PDSCHs and the time domain information of the target PDSCH according to the newly added field "Timelocations of PDSCHs for SIB1 / RMSI" in the downlink control information DCI carried in the PDCCH, where the field "Time locations of PDSCHs for SIB1 / RMSI" occupies {0, 1, ..., X} bits, and X is any one of {0, 1, 2, 3, 4};

[0397] Alternatively, according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, the number of the target PDSCHs and the time domain information of the target PDSCHs are obtained, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0398] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0399] In some optional embodiments of the present application, the subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz; the SCS of the PDCCH satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz.

[0400] In an embodiment of the present application, a communication device is also provided, the communication device comprising a processor and a transceiver. Specifically:

[0401] A processor, configured to determine a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, wherein the PDCCH is used to carry a control resource set coreset#0;

[0402] The processor is further configured to, if the transceiver fails to monitor the PDCCH at the first monitoring opportunity, determine, by the UE, a second monitoring opportunity for the PDCCH according to the first SSB and an SSB having a quasi co-location QCL relationship with the first SSB;

[0403] The transceiver is further configured to monitor the PDCCH at the second monitoring opportunity.

[0404] In some optional embodiments of the present application, the second monitoring opportunity includes a target system frame number SFN c and target time slot number n c ,in,

[0405] SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index;

[0406] n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB.

[0407] In some optional embodiments of the present application, the time slot position of the first SSB differs from the second listening opportunity by a time slot of 0, 1, M / 2 or (M / 2)-1, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

[0408] In some optional embodiments of the present application, the Q value is The value can be any one of 1, 2, 4, 8, 16, 32, or 64.

[0409] In some optional embodiments of the present application, Indicated by parameters "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

[0410] In some optional embodiments of the present application, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 in the next time slot;

[0411] Alternatively, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot;

[0412] The number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

[0413] In some optional embodiments of the present application,

[0414] The processor is also used to determine multiple second listening opportunities according to the first offset and the starting symbol index of the second listening opportunity when the number of the PDCCHs is greater than 1; wherein the first offset is the time domain offset between the PDCCHs adjacent in the time domain.

[0415] In some optional embodiments of the present application, the first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the main information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

[0416] In some optional embodiments of the present application, after the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes:

[0417] The processor is further configured to determine a time domain position of a target physical downlink shared channel PDSCH according to the PDCCH, wherein the target PDSCH carries a system information block SIB1 / remaining minimum system information RMSI.

[0418] In some optional embodiments of the present application, the PDCCH corresponds to a plurality of different time domain positions;

[0419] The target PDSCH corresponds to a plurality of different time domain positions;

[0420] One of the PDCCHs indicates a time domain position of one of the target PDSCHs, or,

[0421] One PDCCH indicates the time domain positions of multiple target PDSCHs.

[0422] In some optional embodiments of the present application, the UE determining the time domain position of the target PDSCH according to the PDCCH includes:

[0423] The UE determines, according to the PDCCH, the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

[0424] In some optional embodiments of the present application, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0425] Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)};

[0426] Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0427] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0428] Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0429] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1};

[0430] Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

[0431] In some optional embodiments of the present application,

[0432] The processor is also used for the UE to determine the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring opportunity.

[0433] In some optional embodiments of the present application,

[0434] The processor is further configured to obtain the number of the target PDSCHs and the time domain information of the target PDSCH according to the newly added field "Timelocations of PDSCHs for SIB1 / RMSI" in the downlink control information DCI carried in the PDCCH, wherein the field "Time locations of PDSCHs for SIB1 / RMSI" occupies {0, 1, ..., X} bits, and X is any one of {0, 1, 2, 3, 4};

[0435] Alternatively, according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, the number of the target PDSCHs and the time domain information of the target PDSCHs are obtained, and the number of bits occupied by the field "Time domain resource assignment" is extended to more than 4 bits;

[0436] The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

[0437] In some optional embodiments of the present application, the subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz; the SCS of the PDCCH satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz.

[0438] The present application also provides a communication system, which includes at least one or more of a network device or a terminal device.

[0439] An embodiment of the present application also provides a computer-readable storage medium, including instructions, which, when executed on a computer, enables the computer to control a network device or a terminal device to execute any one of the implementation methods shown in the aforementioned method embodiments.

[0440] An embodiment of the present application also provides a computer program product, which includes a computer program code. When the computer program code runs on a computer, the computer executes any one of the implementation methods shown in the aforementioned method embodiments.

[0441] An embodiment of the present application also provides a chip system, including a memory and a processor, the memory is used to store computer programs, and the processor is used to call and run computer programs from the memory, so that the chip executes any one of the implementation methods shown in the aforementioned method embodiments.

[0442] An embodiment of the present application also provides a chip system, including a processor, wherein the processor is used to call and run a computer program so that the chip executes any one of the implementation methods shown in the aforementioned method embodiments.

[0443] It should also be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the device embodiments provided by the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

[0444] Through the description of the above implementation methods, the technical personnel in the relevant field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented with corresponding hardware, and the specific hardware structure used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation method in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, a USB flash drive, a mobile hard disk, a ROM, a RAM, a disk or an optical disk, etc., including a number of instructions to enable a computer device to execute the methods of each embodiment of the present application.

[0445] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0446] The computer program product includes one or more computer instructions. When loading and executing the computer program instructions on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website site, a computer, a network device, a terminal device, a network device, a computing device, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, network device, terminal device, network device, computing device, or data center. The computer-readable storage medium can be any available medium that a computer can store or a network device, a data center, and other data storage devices including one or more available media integration. Available media can be magnetic media, (e.g., floppy disk, hard disk, tape), optical media (e.g., DVD), or semiconductor media (e.g., solid-state hard disk (SSD)), etc.

[0447] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in one or more embodiments of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0448] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0449] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0450] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0451] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0452] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0453] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of each embodiment of the present application.

[0454] In short, the above are only preferred embodiments of the technical solution of this application, and are not intended to limit the protection scope of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A channel monitoring method, characterized in that: include: The terminal device UE determines a first monitoring time of a physical downlink control channel PDCCH according to a first synchronization signal block SSB, where the PDCCH is used to carry a control resource set coreset#0; If the UE fails to monitor the PDCCH at the first monitoring opportunity, the UE determines a second monitoring opportunity of the PDCCH according to the first SSB and an SSB having a quasi co-location QCL relationship with the first SSB; The UE monitors the PDCCH at the second monitoring opportunity; The second monitoring opportunity includes a target system frame number SFN c and target time slot number n c ,in, SFN c =SFN ssb，i or SFN c =SFN QCLed_ssb，i , the SFN ssb，i is the system frame number of the first SSB, the SFN QCLed_ssb，i is a system frame number of a QCLed_SSB, the QCLed_SSB having a QCL relationship with the first SSB, the QCL relationship indicating that multiple SSBs at different candidate SSB indexes have the same index; n c =n ssb，i , or, n c =n QCLed_ssb，i , or n c =n ssb，i -1, or n c =n ssb，i +1, or n c =n QCLed_ssb，i -1, where n ssb，i is the time slot number of the first SSB, the n QCLed_ssb，i is the time slot number of the QCLed_SSB.

2. The method according to claim 1, characterized in that: The time slot position of the first SSB differs from the second listening opportunity by 0, 1, M / 2 or (M / 2)-1 time slots, where M is the number of SSBs actually sent or the Q value, and the number of SSBs actually sent is determined by the "ssb-PositionsInBurst" parameter carried in SIB1.

3. The method according to claim 2, characterized in that The Q value is N S Q S C B L , any value among 1, 2, 4, 8, 16, 32, 64.

4. The method according to claim 3, characterized in that N S Q S C B L Indicated by parameters "subCarrierSpacingCommon", "Ssb-SubcarrierOffset" and / or "SearchSpaceZero" in the Master Information Block MIB.

5. The method according to any one of claims 1 to 4, characterized in that: The starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #3 or between symbol #12 of the previous time slot and symbol #1 of the next time slot; Alternatively, the starting symbol index of the second listening opportunity is located in the time slot of the SSB having the QCL relationship, between symbol #0 and symbol #7 or between symbol #10 of the previous time slot and symbol #3 of the next time slot; The number of symbols occupied by the PDCCH in the second monitoring opportunity is any one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

6. The method according to any one of claims 1 to 4, characterized in that The method further comprises: When the number of the PDCCHs is greater than 1, the UE determines a plurality of the second listening opportunities according to the first offset and a starting symbol index of the second listening opportunity; The first offset is the time domain offset between the PDCCHs that are adjacent in the time domain.

7. The method according to claim 6, characterized in that The first offset and / or the number of PDCCHs are indicated by parameters "subCarrierSpacingCommon", "ssb-SubcarrierOffset" and / or "SearchSpaceZero" in a master information block MIB, or the first offset and / or the number of PDCCHs are configured in the UE.

8. The method according to any one of claims 1 to 4, characterized in that After the UE monitors the PDCCH at the second monitoring opportunity, the UE further includes: The UE determines a time domain position of a target physical downlink shared channel PDSCH according to the PDCCH, where the target PDSCH carries a system information block SIB1 / remaining minimum system information RMSI.

9. The method according to claim 8, characterized in that The PDCCH corresponds to a plurality of different time domain positions; The target PDSCH corresponds to a plurality of different time domain positions; One of the PDCCHs indicates a time domain position of one of the target PDSCHs, or, One PDCCH indicates the time domain positions of multiple target PDSCHs.

10. The method according to claim 9, characterized in that The UE determining the time domain position of the target PDSCH according to the PDCCH includes: The UE determines, according to the PDCCH, the starting symbol position S of the target PDSCH, the number L of symbols occupied by the target PDSCH in the time domain, and the interval K0 between the time slot number where the PDCCH is located and the time slot number where the PDSCH is located.

11. The method according to claim 10, characterized in that The value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1}; Or, S takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, L takes a value that satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and K0 takes a value that satisfies one or more of {0, 1, (m×M / 2)}; Or, the values ​​of S and L satisfy any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1}; Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1}; Or, the value of S satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1}; Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, and the value of K0 satisfies one or more of {0, 1, M / 2, M / 2+1}; Or, the value of S satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, the value of L satisfies any one of the set {0, 1, 2, 3, 4, 5, 6, 7, 8}, the value of K0 satisfies one or more of the set {-1-M / 2, -M / 2, 1-M / 2, -1, 0, 1, M / 2-1, M / 2, M / 2+1}, and M is the number of SSBs actually sent or the Q value.

12. The method according to claim 9, characterized in that The UE determines, according to the PDCCH, a time domain position of the target PDSCH, including: The UE determines the time domain position of the target PDSCH according to the downlink control information DCI carried in the PDCCH monitored at the second monitoring opportunity.

13. The method according to claim 9, characterized in that The UE determines, according to the PDCCH, a time domain position of the target PDSCH, including: The UE obtains the number of the target PDSCHs and the time domain information of the target PDSCH according to the newly added field "Time locations of PDSCHs for SIB1 / RMSI" in the downlink control information DCI carried in the PDCCH, where the field "Timelocations of PDSCHs for SIB1 / RMSI" occupies {0, 1, ..., X} bits, and X is any one of {0, 1, 2, 3, 4}; Alternatively, the number of the target PDSCHs and the time domain information of the target PDSCHs are obtained according to the field "Time domain resource assignment" in the DCI carried in the PDCCH, and the number of bits occupied by the field "Time domain resourceassignment" is extended to more than 4 bits; The DCI is DCI 1_0 in which a cyclic redundancy check (CRC) is scrambled by a system information-radio network temporary identifier SI-RNTI.

14. The method according to any one of claims 1 to 4, characterized in that The subcarrier spacing SCS of the first SSB satisfies: 120 kHz KHz, 240 KHz, 480 KHz or 960 KHz; The SCS of the PDCCH satisfies: 120 kHz, 240 KHz, 480 KHz or 960 KHz.

15. A communication device, characterized in that: The communication device comprises: a processor; The processor is configured to execute a computer program or instruction stored in the memory, so that the communication device executes the method according to any one of claims 1 to 14.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium has program instructions, and when the program instructions are directly or indirectly executed, the method according to any one of claims 1 to 14 is implemented.

17. A chip system, characterized in that: The chip system includes at least one processor, which is used to execute a computer program or instruction stored in a memory. When the computer program or the instruction is executed in the at least one processor, the method described in any one of claims 1 to 14 is implemented.

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