Downlink control information (DCI) transmission method, terminal and network equipment

Abstract

The present disclosure relates to a DCI transmission method, a terminal, and a network device, the method executed by the terminal comprising: determining the size of a first DCI, the size of the first DCI being smaller than the size of a second DCI, and both the first DCI and the second DCI being DCI scrambled by SI-RNTI; and receiving the first DCI sent by the network equipment according to the size of the first DCI. Thus, the terminal can receive the first DCI scrambled by the SI-RNTI sent by the network device, and the size of the first DCI is smaller than the size of the second DCI scrambled by the SI-RNTI, so that the performance of the terminal for accurately receiving the DCI scrambled by the SI-RNTI can be improved, downlink coverage can be enhanced, and communication quality can be improved.

Description

Downlink control information DCI transmission method, terminal, and network device Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a DCI transmission method, terminal, and network device. Background Art

[0002] In related technologies, in order to achieve coverage, network equipment can send multiple beams simultaneously. However, the energy of the multiple beams sent cannot be concentrated in one beam, which may result in limited downlink coverage.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a downlink control information (DCI) transmission method, terminal, and network device, which are used to solve the problem that when downlink coverage is limited, the terminal cannot accurately receive the DCI sent by the network device and is scrambled by the system information radio network temporary identifier (SI-RNTI).

[0005] The embodiments of the present disclosure provide a DCI transmission method, a terminal, and a network device.

[0006] According to a first aspect of an embodiment of the present disclosure, a DCI transmission method is proposed, which is executed by a terminal, including: determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and receiving the first DCI sent by a network device according to the size of the first DCI.

[0007] In the above embodiment, the terminal can receive the first DCI encrypted by SI-RNTI sent by the network device, and the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, which can improve the performance of the terminal in accurately receiving the DCI encrypted by SI-RNTI, enhance downlink coverage, and improve communication quality.

[0008] According to a second aspect of an embodiment of the present disclosure, a DCI transmission method is proposed, which is executed by a network device, including: determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and sending the first DCI to the terminal according to the size of the first DCI.

[0009] In the above embodiment, the network device can send a first DCI encrypted by SI-RNTI to the terminal, and the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, which can improve the performance of the terminal in accurately receiving the DCI encrypted by SI-RNTI, enhance downlink coverage, and improve communication quality.

[0010] According to a third aspect of an embodiment of the present disclosure, a DCI transmission method is proposed, wherein a network device determines the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI; the network device sends the first DCI to a terminal according to the size of the first DCI; the terminal determines the size of the first DCI; and the terminal receives the first DCI sent by the network device according to the size of the first DCI.

[0011] According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, including: a processing module for determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and a transceiver module for receiving the first DCI sent by a network device according to the size of the first DCI.

[0012] According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, including: a processing module for determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and a transceiver module for sending the first DCI to a terminal according to the size of the first DCI.

[0013] According to a sixth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores instructions, and when the instructions are executed by the processor, the terminal executes the method described in the first aspect.

[0014] According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores instructions, and when the instructions are executed by the processor, the network device is used to execute the method described in the second aspect.

[0015] According to an eighth aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the method described in the first aspect, and the network device is configured to implement the method described in the second aspect.

[0016] According to a ninth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0018] FIG1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure;

[0019] FIG2 is a flowchart of a DCI transmission method provided by an embodiment of the present disclosure;

[0020] FIG3A is a schematic diagram of a first DCI position provided by an embodiment of the present disclosure;

[0021] FIG3B is a schematic diagram of a second DCI position provided by an embodiment of the present disclosure;

[0022] FIG3C is a schematic diagram of an example of a common search space PDCCH candidate set provided by an embodiment of the present disclosure;

[0023] FIG4A is a flowchart of an information indication method provided by an embodiment of the present disclosure;

[0024] FIG4B is a flowchart of another information indication method provided by an embodiment of the present disclosure;

[0025] FIG5A is a flowchart of another DCI transmission method provided by an embodiment of the present disclosure;

[0026] FIG5B is a flowchart of another information indication method provided by an embodiment of the present disclosure;

[0027] FIG5C is a flowchart of another information indication method provided by an embodiment of the present disclosure;

[0028] FIG6A is a flowchart of another DCI transmission method provided by an embodiment of the present disclosure;

[0029] FIG6B is a flowchart of another information indication method provided by an embodiment of the present disclosure;

[0030] FIG6C is a flowchart of another information indication method provided by an embodiment of the present disclosure;

[0031] FIG7A is a schematic diagram of a 60 kHz SCS time slot provided by an embodiment of the present disclosure;

[0032] FIG7B is a schematic diagram of another 60 kHz SCS time slot provided by an embodiment of the present disclosure;

[0033] FIG8A is a structural diagram of a terminal provided by an embodiment of the present disclosure;

[0034] FIG8B is a structural diagram of a network device provided by an embodiment of the present disclosure;

[0035] FIG9A is a structural diagram of a communication device provided by an embodiment of the present disclosure;

[0036] FIG9B is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] The embodiments of the present disclosure provide a DCI transmission method, a terminal, and a network device.

[0038] In a first aspect, an embodiment of the present disclosure proposes a DCI transmission method, which is executed by a terminal, including: determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and receiving the first DCI sent by a network device according to the size of the first DCI.

[0039] In the above embodiment, the terminal can receive the first DCI encrypted by SI-RNTI sent by the network device, and the size of the first DCI is smaller than the second DCI encrypted by SI-RNTI, which can improve the performance of the terminal in accurately receiving the DCI encrypted by SI-RNTI, enhance downlink coverage, and improve communication quality.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal determines that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI; or determines that the size of the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the common search space CSS is the same as the size of the first DCI.

[0041] In some embodiments, a cyclic redundancy check (CRC) of at least one of the third DCI and the fourth DCI is scrambled by any one of the following RNTIs: TC-RNTI; C-RNTI; random access RA-RNTI; MsgB-RNTI; P-RNTI.

[0042] In some embodiments, the third DCI is scrambled by at least one of the following RNTIs: RA-RNTI, P-RNTI, TC-RNTI, C-RNTI.

[0043] In some embodiments, the third DCI is transmitted in at least one of the following search spaces: USS; CSS.

[0044] In some embodiments, the third DCI has the same DCI format as the first DCI.

[0045] In the above embodiment, when the terminal receives the first DCI scrambled by the SI-RNTI, since the size of the first DCI is smaller than the size of the second DCI scrambled by the SI-RNTI, the size of the third DCI is the same as the size of the first DCI, which can ensure that the payload size of DCI format 1-0 for all purposes remains consistent; or the size of the fourth DCI is the same as the size of the first DCI, which can ensure that the size of DCI format 1-0 transmitted in the CSS remains consistent, thereby avoiding exceeding the requirement on the number of DCI sizes.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0047] In the above embodiment, the first DCI has M bits less than the second DCI, and the size of the first DCI is smaller than the size of the second DCI, so as to improve the performance of the terminal in accurately receiving the first DCI.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the third DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0049] In the above embodiment, the size of the third DCI is the same as the size of the first DDCI, which can ensure that the sizes of the DCIs in the DCI format 1-0 are the same.

[0050] In combination with some embodiments of the first aspect, in some embodiments, multiple third DCIs are respectively scrambled by multiple different wireless network temporary identifiers RNTI, wherein the third DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the third DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0051] In combination with some embodiments of the first aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the fourth DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0052] In the above embodiment, the size of the fourth DCI is the same as the size of the first DCI, which can ensure that the sizes of the DCIs in the DCI format 1-0 transmitted in the CSS are the same.

[0053] In combination with some embodiments of the first aspect, in some embodiments, multiple fourth DCIs are respectively scrambled by multiple different RNTIs, wherein the fourth DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the fourth DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the M bits are composed of at least one of the following: high A bits of the MCS, B reserved bits, C bits in the TBS scaling field, D bits in the VRB to PRB mapping field, E bits in the DAI field, and F bits in the FDRA field, where A, B, C, D, E, and F are all non-negative integers, and A+B+C+D+E+F=M.

[0055] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal determines that the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI, wherein the size of the fifth DCI is W bits less than the size of the sixth DCI in the DCI format 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

[0056] In the above embodiment, when the terminal receives the first DCI and the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI, the sizes of the uplink DCI and the downlink DCI can be aligned, reducing the complexity of the terminal blind detection while ensuring the communication quality.

[0057] In combination with some embodiments of the first aspect, in some embodiments, the size of the fifth DCI is relative to the size of the corresponding sixth DCI, and the first field is W bits less, or the size of the fifth DCI is relative to the size of the corresponding sixth DCI, and the first field is N bits less, and the second field is K bits less.

[0058] In the above embodiment, it is possible to ensure that the size of the fifth DCI scrambled by the TC-RNTI can be consistent with that of the first DCI.

[0059] In combination with some embodiments of the first aspect, in some embodiments, the first field includes at least one of the following: a new data indication NDI; an uplink indication UL indictor; and an uplink supplementary link indication SUL indictor.

[0060] In combination with some embodiments of the first aspect, in some embodiments, the second field is an FDRA field.

[0061] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal sends first indication information to the network device, wherein the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0062] In the above embodiment, the terminal can send a first indication information to the network device, instructing the terminal to receive relevant signaling based on the size of the first DCI, so that the network device can send relevant signaling consistent with the size based on the first DCI to the terminal according to the first indication information of the terminal, thereby enhancing downlink coverage and improving communication quality.

[0063] In combination with some embodiments of the first aspect, in some embodiments, the terminal sends first indication information to the network device, including: sending a message Msg1 to the network device, where Msg1 carries the first indication information; or sending Msg3 to the network device, where Msg3 carries the first indication information; or sending MsgA PRACH to the network device, where MsgA PRACH carries the first indication information; or sending MsgA PUSCH to the network device, where MsgA PUSCH carries the first indication information.

[0064] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal receives first configuration information sent by the network device, wherein the first configuration information is used to indicate the resource set used by the terminal to send at least one of the following messages: Msg1; MsgA PRACH; MsgA PUSCH.

[0065] In the above embodiment, the network device may send the first configuration information to the terminal to instruct the terminal to use resources for sending the first indication information, so as to instruct the terminal to report the first indication information.

[0066] In combination with some embodiments of the first aspect, in some embodiments, Msg3 carries the first indication information, including: using the reserved field in the Msg3 media access control layer protocol data unit MACPDU to carry the first indication information; or using a new media access control layer control unit MACCE to carry the first indication information; or reusing the existing MACCE to carry the first indication information; or using the reserved bit in the unlimited resource control RRC signaling carried by Msg3 or MsgA to carry the first indication information; or using a new logical channel identifier LCID to carry the first indication information.

[0067] In combination with some embodiments of the first aspect, in some embodiments, the above method further includes: the terminal receives second configuration information sent by the network device, wherein the second configuration information is used to indicate the first threshold.

[0068] In combination with some embodiments of the first aspect, in some embodiments, the terminal sends first indication information to the network device, including: determining that the reference signal received power RSRP of the synchronization signal block SSB is lower than the first threshold, and sending the first indication information to the network device.

[0069] In combination with some embodiments of the first aspect, in some embodiments, the relevant signaling includes at least one of the following: the DCI format of RA-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 0-0; the DCI format of MsgB-RNTI scrambled is DCI in 1-0; the DCI format of C-RNTI scrambled is DCI in 0-0; the DCI format of C-RNTI scrambled is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

[0070] In combination with some embodiments of the first aspect, in some embodiments, multiple related signalings, different related signalings correspond to different first thresholds; and / or different first thresholds are associated with different physical random access channel PRACH resource sets.

[0071] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal determines that the first DCI is not limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 4; or determines that the first DCI is limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 5.

[0072] In the above embodiment, when the size of the first DCI scrambled by SI-RNTI is smaller than the size of the second DCI scrambled by SI-RNTI, it can be determined that the first DCI is not subject to the DCI size number limit, wherein the DCI size number limit is the total number of monitored different DCI sizes, and the total number does not exceed 4, or the first DCI is subject to the DCI size number limit, wherein the DCI size number limit is the total number of monitored different DCI sizes, and the total number does not exceed 5. At this time, the size of the third DCI other than the first DCI in the DCI format 1-0 can remain unchanged, and the size of the third DCI other than the first DCI in the DCI format 1-0 can be consistent with the second DCI.

[0073] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the second DCI; or determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the first DCI.

[0074] In the above embodiment, when the size of the first DCI scrambled by SI-RNTI is smaller than the size of the second DCI scrambled by SI-RNTI, the terminal can determine that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the second DCI, or the terminal can also determine that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the first DCI to ensure that the uplink DCI is aligned with the downlink DCI.

[0075] For example, the DCI format 2-X is: DCI scrambled by TPC-PUSCH-RNTI or TPC-PUCCH-RNTI, or DCI scrambled by TPC-SRS-RNTI.

[0076] In combination with some embodiments of the first aspect, in some embodiments, the terminal receives the first DCI sent by the network device, including: receiving the first DCI sent by the network device using specific resources.

[0077] In the foregoing embodiment, the network device may use specific resources to send the first DCI to the terminal.

[0078] In combination with some embodiments of the first aspect, in some embodiments, the specific resources include at least one of the following: a separate frequency domain resource different from the resource provided to the second DCI; a separate time domain resource different from the resource provided to the second DCI; a separate demodulation reference signal DMRS sequence different from the resource provided to the second DCI; a separate search space different from the resource provided to the second DCI; a separate monitoring time PMO different from the resource provided to the second DCI; and a separate physical downlink control channel PDCCH candidate channel different from the resource provided to the second DCI within the same PMO.

[0079] In the foregoing embodiment, the network device may use specific resources to send the first DCI to the terminal, wherein the specific resources are different from the resources provided for the second DCI.

[0080] In the second aspect, an embodiment of the present disclosure proposes a DCI transmission method, which is executed by a network device, including: determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; and sending the first DCI to the terminal according to the size of the first DCI.

[0081] In the above embodiment, the network device can send a first DCI encrypted by SI-RNTI to the terminal, and the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, which can improve the performance of the terminal in accurately receiving the DCI encrypted by SI-RNTI, enhance downlink coverage, and improve communication quality.

[0082] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device determines that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI; or determines that the size of the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS is the same as the size of the first DCI.

[0083] In the above embodiment, when the network device sends the first DCI encrypted by SI-RNTI to the terminal, since the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, when the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI, the size of the DCI in the DCI format 1-0 can be ensured to remain consistent; or when the size of the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS is the same as the size of the first DCI, the size of the DCI in the DCI format 1-0 transmitted in the CSS can be ensured to remain consistent, thereby avoiding exceeding the requirement of the DCI size number limit.

[0084] In combination with some embodiments of the second aspect, in some embodiments, the cyclic redundancy check CRC of at least one of the third DCI and the fourth DCI is scrambled by any one of the following wireless network temporary identifiers RNTI: TC-RNTI; C-RNTI; RA-RNTI; MsgB-RNTI; P-RNTI.

[0085] In combination with some embodiments of the second aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0086] In the above embodiment, the size of the first DCI is smaller than the size of the second DCI, so as to improve the performance of the terminal in accurately receiving the first DCI.

[0087] In combination with some embodiments of the second aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the third DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0088] In combination with some embodiments of the second aspect, in some embodiments, multiple third DCIs are respectively scrambled by multiple RNTIs, wherein the third DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the third DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0089] In combination with some embodiments of the second aspect, in some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the fourth DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0090] In combination with some embodiments of the second aspect, in some embodiments, multiple fourth DCIs are respectively scrambled by multiple different RNTIs, wherein the fourth DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the fourth DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0091] In combination with some embodiments of the second aspect, in some embodiments, the M bits are composed of at least one of the following: high A bits of the MCS, B reserved bits, C bits in the TBS scaling field, D bits in the VRB to PRB mapping field, E bits in the DAI field, and F bits in the FDRA field, where A, B, C, D, E, and F are all non-negative integers ≤M, and A+B+C+D+E+F=M.

[0092] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device determines that the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI, wherein the size of the fifth DCI is W bits less than the size of the sixth DCI in the DCI format 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

[0093] In the above embodiment, the network device sends the first DCI to the terminal, and when the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI, the sizes of the uplink DCI and the downlink DCI can be aligned to ensure communication quality.

[0094] In combination with some embodiments of the second aspect, in some embodiments, the size of the fifth DCI is W bits less in the first field relative to the size of the corresponding sixth DCI, or the size of the fifth DCI is N bits less in the first field and K bits less in the second field relative to the size of the corresponding sixth DCI.

[0095] In combination with some embodiments of the second aspect, in some embodiments, the first field includes at least one of the following: NDI; UL indictor; SUL indictor.

[0096] In combination with some embodiments of the second aspect, in some embodiments, the second field is an FDRA field.

[0097] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device receives first indication information sent by the terminal, wherein the first indication information is used to indicate that the terminal supports the reception of related signaling based on the size of the first DCI.

[0098] In combination with some embodiments of the second aspect, in some embodiments, the network device receives the first indication information sent by the terminal, including: receiving a message Msg1 sent by the terminal, wherein Msg1 carries the first indication information; or receiving a message Msg3 sent by the terminal, wherein Msg3 carries the first indication information; or receiving a MsgA PRACH sent by the terminal, wherein MsgA PRACH carries the first indication information; or receiving a MsgA PUSCH sent by the terminal, wherein MsgA PUSCH carries the first indication information.

[0099] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device sends first configuration information to the terminal, wherein the first configuration information is used to indicate the resource set used by the terminal to send at least one of the following messages: Msg1; MsgA PRACH; MsgA PUSCH.

[0100] In combination with some embodiments of the second aspect, in some embodiments, Msg3 carries the first indication information, including: using the reserved field in the Msg3MAC PDU to carry the first indication information; or using a new MAC CE to carry the first indication information; or reusing the existing MAC CE to carry the first indication information; or using the reserved bit in the RRC signaling carried by Msg3 or MsgA to carry the first indication information; or using a new LCID to carry the first indication information.

[0101] In combination with some embodiments of the second aspect, in some embodiments, the above method further includes: the network device sends second configuration information to the terminal, wherein the second configuration information is used to indicate the first threshold.

[0102] In combination with some embodiments of the second aspect, in some embodiments, the network device receives the first indication information sent by the terminal, including: the receiving terminal sends the first indication information to the network device when determining that the RSRP of the SSB is lower than the first threshold.

[0103] In combination with some embodiments of the second aspect, in some embodiments, the relevant signaling includes at least one of the following: the DCI format of RA-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 0-0; the DCI format of MsgB-RNTI scrambled is DCI in 1-0; the DCI format of C-RNTI scrambled is DCI in 0-0; the DCI format of C-RNTI scrambled is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

[0104] In combination with some embodiments of the second aspect, in some embodiments, multiple related signalings, different related signalings correspond to different first thresholds; and / or different first thresholds are associated with different PRACH resource sets.

[0105] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device determines that the first DCI is not limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 4; or determines that the first DCI is limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 5.

[0106] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: the network device determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the second DCI; or determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the first DCI.

[0107] In combination with some embodiments of the second aspect, in some embodiments, the network device sends the first DCI to the terminal, including: sending the first DCI to the terminal using specific resources.

[0108] In combination with some embodiments of the second aspect, in some embodiments, the specific resources include at least one of the following: a separate frequency domain resource different from the resources provided to the second DCI; a separate time domain resource different from the resources provided to the second DCI; a separate DMRS sequence different from the resources provided to the second DCI; a separate search space different from the resources provided to the second DCI; a separate PMO different from the resources provided to the second DCI; and a separate PDCCH candidate channel different from the resources provided to the second DCI within the same PMO.

[0109] In a third aspect, an embodiment of the present disclosure proposes a DCI transmission method, wherein a network device determines the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; the network device sends the first DCI to the terminal according to the size of the first DCI; the terminal determines the size of the first DCI; and the terminal receives the first DCI sent by the network device according to the size of the first DCI.

[0110] In a fourth aspect, an embodiment of the present disclosure proposes a terminal, which includes at least one of a transceiver module and a processing module; wherein the terminal is used to execute the optional implementation method of the first aspect.

[0111] In a fifth aspect, an embodiment of the present disclosure proposes a network device, which includes at least one of a transceiver module and a processing module; wherein the network device is used to execute the optional implementation method of the second aspect.

[0112] In a sixth aspect, an embodiment of the present disclosure proposes a terminal, which includes: one or more processors; a memory coupled to the processor, the memory storing instructions, which, when executed by the processor, enables the terminal to execute the optional implementation method of the first aspect.

[0113] In the seventh aspect, an embodiment of the present disclosure proposes a network device, which includes: one or more processors; a memory coupled to the processor, on which instructions are stored, and when the instructions are executed by the processor, the network device is used to execute the optional implementation method of the second aspect.

[0114] In the eighth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0115] In a ninth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0116] In a tenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0117] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0118] In a twelfth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0119] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0120] The embodiments of the present disclosure provide a DCI transmission method, terminal, and network device. In some embodiments, the DCI transmission method, information processing method, communication method, and other terms can be used interchangeably.

[0121] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0122] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0123] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0124] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0125] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0126] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. can be used interchangeably.

[0127] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0128] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0129] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0130] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0131] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0132] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0133] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0134] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0135] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0136] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0137] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0138] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0139] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0140] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0141] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0142] 1. PDCCH:

[0143] The PDCCH is used to carry scheduling and other control information, such as downlink control information (DCI). The PDCCH is composed of control channel elements (CCEs).

[0144] 2. DCI

[0145] DCI can include information such as resource block (RB) allocation and modulation and coding scheme (MCS). Different DCIs carry different information and have different functions. To categorize DCI, the protocol defines multiple DCI formats.

[0146] For example, the current communication standard defines the following DCI format:

[0147] DCI format0-0: used to schedule terminal uplink data;

[0148] DCI format1-0: used to schedule terminal downlink data;

[0149] DCI format2-0: used to indicate the timeslot format;

[0150] DCI format 2-1: used to indicate interrupted transmission;

[0151] The above is only an example of the DCI format, which will not be described in detail here.

[0152] 3. Control resource set CORESET (control resource set, CORESET)

[0153] A control resource set (CRS) represents a set of time-frequency resources that carry a PDCCH. A CRS consists of several resource blocks (RBs) in the frequency domain and several symbols in the time domain. A terminal device can correspond to multiple CRSs, and each CRS can only bind one CCE to a resource element group (REG) mapping relationship. REGs are the basic unit of PDCCH resource mapping. One REG is defined as one RB in one OFDM symbol, and one RB is defined as 12 consecutive subcarriers in frequency and one OFDM symbol in the time domain. REG bundling is a new concept introduced in NR. REGs are first organized into REG bundles using a time-first mapping (TF) method and then mapped to control resources using interleaved or non-interleaved granularity at the REG bundle level. A REG bundle consists of a group of contiguous REGs in the time and / or frequency domains. The size of a REG bundle is equal to the REG size in the frequency domain multiplied by the OFDM symbol size in the time domain.

[0154] For the pdcch-ConfigSIB1 in the MIB information, different pdcch-ConfigSIB1 state values ​​correspond to different control resource set information. The terminal device obtains the time-frequency range in which the PDCCH may appear through pdcch-ConfigSIB1, and detects all possible PDCCH locations through blind monitoring until the PDCCH is successfully decoded.

[0155] 4. Radio Network Temporary Identifier (RNTI)

[0156] RNTI is a network device configuration used to identify a connected terminal device in a cell, a group of terminals in a paging scenario, and / or a specific radio channel. Different types of RNTIs all work by scrambling the cyclic redundancy check (CRC) of the downlink control information (DCI) in the radio channel. DCI is carried in the physical downlink control channel (PDCCH).

[0157] 5. Modulation and coding scheme (MCS)

[0158] The MCS modulation coding table is a representation proposed by 802.11n to characterize the communication rate of WLAN. NR rate matching is achieved through the MCS index value. Each MCS index corresponds to a set of modulation order, target code rate, and spectrum efficiency. The MCS index is indicated by DCI. The PDSCH carrying SIB1 is scheduled by DCI scrambled by the system information (system information) radio network temporary identifier (SI-RNTI for short). At this time, there are some reserved idle bits, which are 15 bits or 17 bits. In the following embodiments, the first field is used to represent the idle bits.

[0159] In existing protocols, for DCI scrambled by a paging radio network temporary identifier P-RNTI, a random access radio network temporary identifier RA-RNTI, or a SI-RNTI, the modulation order must be less than or equal to 2.

[0160] There are 5 bits in the DCI used to indicate the MCS index value. When the MCS index range is 0 to 9, the corresponding modulation order is 2; when the MCS index range is 10 to 16, the modulation order is 4; when the MCS index range is 17 to 28, the modulation order is 6; when the MCS index range is 29, 30, and 31, the modulation orders are 2, 4, and 6, respectively. Among them, when the MCS index value is 0 to 28, each index value corresponds to a coding rate and spectrum efficiency at the same time. When the MCS index value is 29 to 31, it is in a reserved state and no coding rate and spectrum efficiency indication is temporarily made. Therefore, for the PDSCH carrying SIB1, the DCI of the PDSCH is scheduled.

[0161] When the indicated modulation order does not exceed 2, the corresponding MCS index value ranges from 0 to 9. At this time, the state of the 5-bit field indicating the MCS index value is 0000 to 01001, and the highest bit of the MCS index value indication field is 0.

[0162] FIG1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure.

[0163] As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0164] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0165] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0166] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0167] In some embodiments, the core network device may be a single device including a first network function, a second network function, etc., or may be a plurality of devices or a group of devices each including all or part of the first network function, the second network function, etc. The network function may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0168] In some embodiments, the first network function is, for example, an access and mobility management function (AMF).

[0169] In some embodiments, the first network function is used for access control and mobility management of the terminal accessing the operator network, for example, including functions such as mobile status management, allocation of user temporary identity, authentication and authorization of users, etc., and its name is not limited to this.

[0170] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0171] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0172] The embodiments of the present disclosure may be applied to long term evolution (LTE), LTE-advanced (LTE-A), LTE-beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), global system for mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wideband (UWB), and the like. band, UWB), Bluetooth (registered trademark), public land mobile network (PLMN) network, device-to-device (D2D) system, machine-to-machine (M2M) system, Internet of Things (IoT) system, vehicle-to-everything (V2X), systems using other communication methods, and next-generation systems based on them. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0173] In related technologies, network equipment can transmit multiple beams simultaneously to achieve coverage. However, these beams cannot concentrate their energy into a single beam, potentially limiting downlink coverage. Improving the performance of terminals receiving DCI scrambled by SI-RNTI and enhancing downlink coverage is an urgent issue.

[0174] Based on this, embodiments of the present disclosure provide a DCI transmission method, terminal, and network device. The method, performed by the terminal, includes: determining the size of a first DCI, wherein the size of the first DCI is smaller than the size of a second DCI, and both the first DCI and the second DCI are DCI scrambled by SI-RNTI; and receiving the first DCI sent by the network device based on the size of the first DCI. This allows the terminal to receive the first DCI scrambled by SI-RNTI and sent by the network device, and the size of the first DCI is smaller than the size of the second DCI scrambled by SI-RNTI. This improves the terminal's ability to accurately receive DCI scrambled by SI-RNTI, enhances downlink coverage, and improves communication quality.

[0175] FIG2 is an interactive diagram of a DCI transmission method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a DCI transmission method, the method comprising:

[0176] S201: A network device determines a size of a first DCI.

[0177] In some embodiments, the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI.

[0178] Optionally, the size of the first DCI being smaller than the size of the second DCI refers to a case where the influence of the length of the Frequency Domain Resource Assignment (FDRA) field is not considered. That is, if the length of the Frequency Domain Resource Assignment field in the first DCI and the second DCI is the same, the size of the first DCI is smaller than the size of the second DCI.

[0179] Optionally, the size of the second DCI is 28+Xbit, where Xbit is the length of the FDRA field, that is, the size of the first DCI is smaller than 28+Xbit.

[0180] It should be noted that the size of the DCI may also be referred to as the effective payload size of the DCI or the effective payload of the DCI, which are interchangeable.

[0181] It can be understood that both the first DCI and the second DCI are DCI scrambled by SI-RNTI, the size of the first DCI is smaller than the size of the second DCI, and the first DCI may have M bits less than the second DCI, where M is an integer greater than 0.

[0182] In the embodiment of the present disclosure, the network device determines the size of the first DCI, and the size of the first DCI is smaller than the size of the second DCI. If the network device chooses to send the first DCI to the terminal, the performance of the terminal in accurately receiving the DCI encrypted by the SI-RNTI can be improved, thereby enhancing downlink coverage and improving communication quality.

[0183] It should be noted that after the terminal receives the synchronization signal and physical broadcast channel block (SSB) sent by the network device, the first channel with a performance gap received is the physical downlink control channel (PDCCH) of the scheduling system information block (SIB) 1, and the PDCCH needs to be enhanced.

[0184] Based on this, the SIB1 PDCCH can be enhanced by introducing a first DCI, the size of which is smaller than the size of the second DCI. Thus, the network device sends the first DCI to the terminal, which can improve the terminal's ability to accurately receive the DCI encrypted by SI-RNTI, enhance downlink coverage, and improve communication quality.

[0185] In some embodiments, the first DCI scrambled by the SI-RNTI is also referred to as SIB1 DCI, and the two names are interchangeable.

[0186] S202: The terminal determines the size of the first DCI.

[0187] In some embodiments, the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI.

[0188] It can be understood that both the first DCI and the second DCI are DCI scrambled by SI-RNTI, and the size of the first DCI is smaller than the size of the second DCI.

[0189] In the embodiment of the present disclosure, the terminal determines the size of the first DCI, and the size of the first DCI is smaller than the size of the second DCI. If the terminal receives the first DCI sent by the network device, the performance of the terminal in accurately receiving the DCI encrypted by the SI-RNTI can be improved, thereby enhancing downlink coverage and improving communication quality.

[0190] S203: The network device sends the first DCI to the terminal according to the size of the first DCI.

[0191] In the embodiment of the present disclosure, after determining the size of the first DCI, the network device may send the first DCI to the terminal according to the size of the first DCI.

[0192] In some embodiments, after determining the size of the first DCI, the terminal may receive the first DCI sent by the network device according to the size of the first DCI.

[0193] In some embodiments, the first DCI is a DCI scrambled by the SI-RNTI, the size of the first DCI is smaller than the size of the second DCI, and the second DCI is a DCI scrambled by the SI-RNTI.

[0194] In some embodiments, the network device sends the first DCI to the terminal, and the terminal receives the first DCI, which can improve the terminal's performance in accurately receiving the DCI scrambled by the SI-RNTI, enhance downlink coverage, and improve communication quality.

[0195] In some embodiments, the network device sends the first DCI to the terminal, including: sending the first DCI to the terminal using specific resources.

[0196] In the embodiment of the present disclosure, the network device may use specific resources to send the first DCI to the terminal.

[0197] In some embodiments, the specific resource is different from the resource used by the network device to send the second DCI to the terminal.

[0198] In some embodiments, the specific resources include at least one of the following: a separate frequency domain resource different from the resource provided to the second DCI; a separate time domain resource different from the resource provided to the second DCI; a separate DMRS sequence different from the resource provided to the second DCI; a separate search space different from the resource provided to the second DCI; a separate PMO different from the resource provided to the second DCI; and a separate PDCCH candidate channel different from the resource provided to the second DCI within the same PMO.

[0199] In the embodiment of the present disclosure, the specific resource is a separate frequency domain resource that is different from the resource provided for the second DCI, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0200] In some embodiments, the frequency domain resources are implicitly determined by some rules, such as the offset from the legacy CORESET#0, which can also be selected as the initial downlink bandwidth part (BWP) during the initial access process.

[0201] In the embodiment of the present disclosure, the specific resource is a separate time domain resource that is different from the resource provided for the second DCI, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0202] In the embodiment of the present disclosure, the specific resource is a separate demodulation reference signal (DMRS) sequence that is different from the resource provided for the second DCI, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0203] In the embodiment of the present disclosure, the specific resource is a separate search space different from the resource provided for the second DCI, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0204] In the embodiment of the present disclosure, the specific resource is a separate PDCCH monitoring occasion (PMO) different from the resource provided for the second DCI, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0205] In some embodiments, the separate search space can be implicitly determined by some rules, i.e., it has some relationship with the old search space zero. For example, it can be some time offset (symbol level, time slot level, half-frame or frame level) from the old search space zero, or it can have the same time position as search space zero within a certain time period, but the two search spaces have different time periods, and / or the time period for adding PDCCH can be postponed to the time period / window of CSS#0. Alternatively, the separate CSS#0 index is implicitly determined by the old CSS#0 index.

[0206] For example, for the following positions of multiplexing mode 1, the first DCI (SIB1 DCI) is located in slots #5 to #9, and the symbol positions are shown in Figure 3A. Alternatively, a symbol offset is specified for the first DCI (SIB1 DCI) alone, ie, N_offset≥5.

[0207] For SSB & CORE SET #0 multiplexing mode 1, when M in the PMO determination table = 1 or 2, the following scheme can also be considered: the first DCI (additional SIB1 PDCCH) and the second DCI (legacy SIB1 PDCCH) are respectively transmitted on the PMO in two time slots within the duration window.

[0208] As shown in FIG3B , for SSB#0, the second DCI (legacy PDCCH) transmission position may be located in slot#10, and the first DCI (additional SIB1 PDCCH) transmission position may be located in slot#11, or vice versa.

[0209] In the embodiment of the present disclosure, the specific resource is a separate PDCCH candidate channel that is different from the resource provided for the second DCI in the same PMO, wherein the resource provided for the second DCI is the resource used by the network device when sending the second DCI to the terminal.

[0210] In summary, as shown in Figure 3C, for the public search space: N cce,p =32, L=4 / 8 / 16, an example of a PDCCH candidate set, where the padded CCEs will be applicable to the first DCI.

[0211] In addition, if the number of CCEs exceeds 32, you can also choose More Applicable.

[0212] In some embodiments, different bands, different CORESETs, search space configurations, or different multiplexing patterns may use different schemes described above. For example, for multiplexing pattern #2 or multiplexing pattern #3, the scheme of using different individual PDCCH candidate channels within the same PMO is not used, or when the number of CCEs in CORESET #0 is less than 16, the scheme of using different individual PDCCH candidate channels within the same PMO is not used. Another possible approach is that the terminal does not expect the number of CCEs to be less than 32, and accordingly, an extended configuration table is required for certain SCS combinations.

[0213] In addition to the above methods, the following method can also be used: the first DCI uses legacy resources and legacy PDCCH candidates. In this case, for the transmission of the first DCI, in order to reduce the blind detection complexity of the terminal, the following solution can be considered: the first DCI uses a separate DMRS sequence.

[0214] In some embodiments, the size of the first DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0215] In the embodiment of the present disclosure, the first DCI and the second DCI are both DCIs scrambled by SI-RNTI. Compared with the second DCI, the first DCI has M bits less than the second DCI. The size of the first DCI is smaller than the size of the second DCI, and M is an integer greater than 0.

[0216] In some embodiments, the M bits are composed of at least one of the following: high A bits of the MCS, B reserved bits, C bits in the TBS scaling field, D bits in the VRB to PRB mapping field, E bits in the DAI field, and F bits in the FDRA field, where A, B, C, D, E, and F are all non-negative integers, and A+B+C+D+E+F=M.

[0217] In the embodiment of the present disclosure, the first DCI is M bits less than the second DCI, where the M bits may be high-order M bits of a modulation and coding scheme (MCS).

[0218] It is understandable that the lower bits of the MCS can only be used to indicate the lower rows in the MCS table, or the MCS table is redefined in the protocol, or the MCS table can be configured by the network device (if not configured, the MCS table in the protocol is used).

[0219] In the embodiment of the present disclosure, the first DCI has M bits less than the second DCI, where the M bits can be M reserved bits.

[0220] In the embodiment of the present disclosure, the first DCI is M bits less than the second DCI, where the M bits may be M bits in a transport block size (TBS) scaling field.

[0221] In some embodiments, considering coverage-limited scenarios, physical downlink shared channel (PDSCH) transmission is also limited. Therefore, all bits in the TBS scaling field can be removed. Furthermore, for scheduling under coverage-limited scenarios, the TBS scaling factor of Msg2 / MsgB / paging PDSCH is fixed to 0.25; alternatively, one bit in the TBS scaling field is removed, and the remaining bit is used to indicate {1, 0.25} or {0.5, 0.25}, etc.

[0222] In an embodiment of the present disclosure, the first DCI has M bits less than the second DCI, where the M bits may be M bits in a virtual resource block to physical resource block mapping (VRB-to-PRB mapping).

[0223] In some embodiments, distributed resource mapping can obtain diversity gain, and for localized resource mapping, if the coherence bandwidth is large, the terminal can use the demodulation reference signal (DMRS) on multiple PRBs for joint channel estimation, which can obtain more accurate channel estimation performance. Considering that for broadcast DCI, the channel states from different terminals to the network device are different, or there is no channel state information (CSI) feedback in the initial access phase, it is difficult for the network device to determine whether to use distributed resource mapping or localized resource mapping, so it can be considered to remove this bit. Accordingly, the protocol defaults to non-interleaved VRB-to-PRB mapping, or interleaved VRB-to-PRB mapping.

[0224] In some embodiments, if M bits in the VRB to PRB mapping field are missing, the network device sends indication information to the terminal, wherein the indication information is used to indicate that the VRB to PRB mapping is interleaved mapping (interleaved VRB-to-PRB mapping), or the indication information is used to indicate that the VRB to PRB mapping is non-interleaved mapping (non-interleaved VRB-to-PRB mapping).

[0225] In the embodiment of the present disclosure, the first DCI is M bits less than the second DCI, where the M bits may be M bits in a downlink assignment index (DAI) field.

[0226] In the embodiment of the present disclosure, the first DCI is M bits less than the second DCI, where the M bits may be M bits in a frequency domain resource assignment (FDRA) field.

[0227] In an embodiment of the present disclosure, the first DCI has M bits less than the second DCI, where the M bits can be the high A bits of the MCS, B reserved bits, C bits in the TBS scaling field, D bits in the VRB to PRB mapping field, E bits in the DAI field, and F bits in the FDRA field, where A, B, C, D, E, and F are all non-negative integers, and A+B+C+D+E+F=M.

[0228] Exemplarily, M is 2, A and B are both 1, and C, D, E, and F are all 0, that is, the first DCI has 2 bits less than the second DCI, and the 2 bits can be the high 1 bit of MCS and 1 reserved bit.

[0229] Exemplarily, M is 3, A, B and C are all 1, and D, E and F are all 0, that is, the first DCI has 3 bits less than the second DCI. The 3 bits can be the high bit of MCS, 1 reserved bit, and 1 bit in the TBS scaling field.

[0230] It should be noted that the above examples are for illustration only, M may also have other values, and A, B, C, D, E, and F may also have other values, and the embodiments of the present disclosure do not impose specific limitations on this.

[0231] It is understandable that the sizes of the DCIs in DCI formats 1-0 need to remain consistent to avoid exceeding the DCI size limit. The DCI size limit is that the total number of monitored different DCI sizes does not exceed 4.

[0232] Among them, when the DCI encrypted by SI-RNTI in DCI format 1-0 is the first DCI, since the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, it is necessary to consider the size of the third DCI in DCI format 1-0 other than the first DCI.

[0233] In some embodiments, the network device determines that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI.

[0234] In some embodiments, the terminal determines that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI.

[0235] In some embodiments, the third DCI in DCI format 1-0 may be: a DCI in DCI format 1-0 transmitted in a user equipment-specific search space (UE-specific search space, USS) and a common search space (common search space, CSS).

[0236] It can be understood that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI. Then, when the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, the size of the third DCI is smaller than the size of the second DCI, so that the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the first DCI.

[0237] In some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the third DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0238] In some embodiments, multiple third DCIs are respectively scrambled by multiple RNTIs, wherein the third DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the third DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0239] It can be understood that, in addition to the first DCI, the DCI format 1-0 includes a third DCI scrambled by multiple different radio network temporary identifiers (RNTIs), and the third DCI scrambled by different RNTIs has M bits less in the same position relative to the second DCI, or the third DCI scrambled by different RNTIs has M bits less in different positions relative to the second DCI.

[0240] In the embodiment of the present disclosure, the third DCI scrambled by different RNTIs has M bits less in different positions relative to the second DCI, which may be M bits less in different fields, or M bits less in a combination of different fields, etc.

[0241] In some embodiments, the DCI format is a third DCI scrambled with a different RNTI except the first DCI in 1-0, including: paging DCI, other system information (OSI) DCI, Msg2 DCI, MsgB DCI, Msg4 DCI, etc.

[0242] It is understandable that the sizes of the DCIs in DCI formats 1-0 transmitted in the CSS need to remain consistent to avoid exceeding the DCI size limit, which is that the total number of monitored different DCI sizes does not exceed 4.

[0243] Among them, when the DCI format 1-0 included in the CSS and encrypted by SI-RNTI is the first DCI, since the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, it is necessary to consider the size of the fourth DCI other than the first DCI in the DCI format 1-0 included in the CSS and encrypted.

[0244] In some embodiments, the network device determines that the size of the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS is the same as the size of the first DCI.

[0245] In some embodiments, the terminal determines that the size of the fourth DCI other than the first DCI in the DCI format 1-0 included in the CSS and transmitted is the same as the size of the first DCI.

[0246] It can be understood that the size of the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS is the same as the size of the first DCI, and the size of the fourth DCI is smaller than the size of the second DCI, so that the size of the third DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS is the same as the size of the first DCI.

[0247] In some embodiments, the size of the first DCI is M bits less than the size of the second DCI, and the size of the fourth DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

[0248] In an embodiment of the present disclosure, when the size of the first DCI is M bits less than the size of the second DCI, the size of the fourth DCI is M bits less than the size of the second DCI, ensuring that the fourth DCI other than the first DCI in the DCI format 1-0 transmitted in the CSS has the same size as the first DCI.

[0249] In some embodiments, multiple fourth DCIs are respectively scrambled by multiple different RNTIs, wherein the fourth DCIs scrambled by different RNTIs have M fewer bits in the same position relative to the second DCI, or the fourth DCIs scrambled by different RNTIs have M fewer bits in different positions relative to the second DCI.

[0250] It can be understood that the DCI format 1-0 transmitted in the CSS includes, in addition to the first DCI, a fourth DCI encrypted with multiple different RNTIs, and the fourth DCI encrypted with different RNTIs has M bits less in the same position relative to the second DCI, or the fourth DCI encrypted with different RNTIs has M bits less in different positions relative to the second DCI.

[0251] In the embodiment of the present disclosure, the fourth DCI scrambled by different RNTIs has M bits less in different positions than the second DCI, which can be M bits in different fields, or M bits in different field combinations, etc.

[0252] It is understandable that the size of the fifth DCI in DCI format 0-0 needs to be consistent with the size of the DCI in DCI format 1-0 to ensure alignment of the uplink DCI and the downlink DCI.

[0253] Among them, when the DCI scrambled by SI-RNTI in DCI format 1-0 is the first DCI, since the size of the first DCI is smaller than the size of the second DCI scrambled by SI-RNTI, the size of the fifth DCI in DCI format 0-0 needs to be considered at this time.

[0254] In some embodiments, the network device determines that the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI.

[0255] In some embodiments, the terminal determines that the size of the fifth DCI in the DCI format 0-0 is the same as the size of the first DCI.

[0256] It can be understood that the size of the fifth DCI in DCI format 0-0 is the same as the size of the first DCI. Then, when the size of the first DCI is smaller than the size of the second DCI encrypted by SI-RNTI, the size of the fifth DCI is smaller than the size of the sixth DCI in DCI format 0-0 so that the size of the DCI in DCI format 1-0 is the same as the size of the first DCI.

[0257] The size of the fifth DCI is W bits less than the size of the sixth DCI with DCI format 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

[0258] In some embodiments, the size of the fifth DCI is W bits less in the first field relative to the size of the corresponding sixth DCI, or the size of the fifth DCI is N bits less in the first field and K bits less in the second field relative to the size of the corresponding sixth DCI.

[0259] In the embodiment of the present disclosure, the fifth DCI in the DCI format 0-0 is scrambled by a temporary cell radio network temporary identifier (TC-RNTI).

[0260] Among them, when the size of the fifth DCI is the same as the size of the first DCI, and the size of the first DCI is M bits less than the size of the second DCI, the fifth DCI is W bits less than the sixth DCI, and the size of the fifth DCI is the same as the size of the first DCI.

[0261] Among them, the fifth DCI has W fewer bits than the sixth DCI, and may have W fewer bits of the first field.

[0262] The fifth DCI has W fewer bits than the sixth DCI, which may be N fewer bits of the first field and K fewer bits of the second field, where N and K are integers greater than 0, and N+K=W.

[0263] In some embodiments, the first field includes at least one of the following: NDI; UL indictor; SUL indictor.

[0264] In the embodiment of the present disclosure, the fifth DCI has W fewer bits than the sixth DCI, and may have W fewer bits of the first field, and the first field may be a new data indicator (NDI).

[0265] Exemplarily, when W is 2, the fifth DCI has W fewer bits than the sixth DCI, and may have 2 fewer bits of NDI.

[0266] In the embodiment of the present disclosure, the fifth DCI has W fewer bits than the sixth DCI, and may have W fewer bits of the first field. The first field may be an uplink indicator UL indictor.

[0267] In the embodiment of the present disclosure, the fifth DCI has W fewer bits than the sixth DCI, and may have W fewer bits of the first field. The first field may be an uplink supplementary link indicator SUL indictor.

[0268] In the embodiment of the present disclosure, the fifth DCI has W fewer bits than the sixth DCI, and may have W fewer bits of the first field. The first field may be at least two of NDI, UL indictor, and SUL indictor.

[0269] Exemplarily, when W is 2, the fifth DCI has W fewer bits than the sixth DCI, and may have one less bit of NDI and one less bit of SUL indictor.

[0270] Exemplarily, when W is 3, the fifth DCI has W bits less than the sixth DCI, which may include one bit less NDI, one bit less UL indictor, and one bit less SUL indictor.

[0271] It should be noted that the above examples are for illustration only, W may also have other values, and the first field may also have other combinations, and the embodiments of the present disclosure do not impose specific restrictions on this.

[0272] In some embodiments, the second field is a FDRA field.

[0273] In some embodiments, for the sixth DCI scrambled by TC-RNTI in DCI format 0-0, when its size exceeds the size of the first DCI, a fifth DCI having the same payload size as the first DCI is obtained by reducing at least one of the NDI, UL indictor, and SUL indictor of the sixth DCI scrambled by TC-RNTI in DCI format 0-0 by a certain number of bits. If the fifth DCI having the same payload size as the first DCI cannot be obtained, and its size is still larger than the size of the first DCI, a certain number of bits in the upper portion of the FDRA field are further reduced to achieve size alignment between the fifth DCI scrambled by TC-RNTI in DCI format 0-0 and the first DCI.

[0274] In some embodiments, the DCI format is 0-0 and at least one of the NDI, UL indictor, and SUL indictor of the sixth DCI encrypted by TC-RNTI is W bits less. The terminal can determine the priority of at least one of the NDI, UL indictor, and SUL indictor that is W bits less based on protocol agreement or instructions from the network device.

[0275] Illustratively, the protocol stipulates or the network device indicates that the priority of at least one of NDI, UL indictor and SUL indictor is W bits less, which is NDI less bits, UL indictor less bits and SUL indictor less bits, up to at least W bits.

[0276] In some embodiments, the terminal determines that the first DCI is not limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 4; or determines that the first DCI is limited by the number of DCI sizes, wherein the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 5.

[0277] In some embodiments, the network device determines that the first DCI is not subject to the DCI size number limit, wherein the DCI size number limit is the total number of monitored different DCI sizes, and the total number does not exceed 4; or determines that the first DCI is subject to the DCI size number limit, wherein the DCI size number limit is the total number of monitored different DCI sizes, and the total number does not exceed 5.

[0278] It can be understood that when the first DCI is not limited by the number of DCI sizes, and the number of DCI sizes is limited to the total number of monitored different DCI sizes, and the total number does not exceed 4, the size of the DCI in the DCI format 1-0 does not need to be consistent. At this time, there are two specifications for the size of the DCI in the DCI format 1-0: the size of the first DCI and the size of the third DCI other than the first DCI in the DCI format 1-0, where the size of the third DCI other than the first DCI in the DCI format 1-0 is the same as the size of the second DCI.

[0279] It can be understood that the first DCI is limited by the number of DCI sizes, where the number of DCI sizes is limited to the total number of monitored different DCI sizes. When the total number does not exceed 5, the size of the DCI in the DCI format 1-0 does not need to be consistent. At this time, there are two specifications for the size of the DCI in the DCI format 1-0: the size of the first DCI and the size of the third DCI in the DCI format 1-0 other than the first DCI, where the size of the third DCI in the DCI format 1-0 other than the first DCI is the same as the size of the second DCI.

[0280] In the embodiment of the present disclosure, the DCI size number limit can be consistent with the existing protocol. The DCI size number limit is the total number of monitored different DCI sizes, which does not exceed 4. The first DCI is not subject to the DCI size number limit.

[0281] In the embodiment of the present disclosure, the DCI size limit can be updated based on the existing limit of the protocol. The DCI size limit is the total number of monitored different DCI sizes, which does not exceed 5, and the first DCI is subject to the DCI size limit.

[0282] It is understandable that the size of the fifth DCI in DCI format 0-0 needs to be consistent with the size of the DCI in DCI format 1-0 to ensure alignment of the uplink DCI and the downlink DCI.

[0283] There are two specifications for the size of DCI in DCI format 1-0: the size of the first DCI and the size of the third DCI other than the first DCI in DCI format 1-0, where the size of the third DCI other than the first DCI in DCI format 1-0 is the same as the size of the second DCI.

[0284] At this time, it is necessary to consider how to align the size of the fifth DCI in the DCI format 0-0.

[0285] In some embodiments, the terminal determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the second DCI; or determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the first DCI.

[0286] In some embodiments, the network device determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the second DCI; or determines that the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X is the same as the size of the first DCI.

[0287] In the embodiment of the present disclosure, the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X may be the same as the size of the second DCI to ensure alignment of the uplink DCI and the downlink DCI.

[0288] In the embodiment of the present disclosure, the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X may be the same as the size of the first DCI to ensure alignment of the uplink DCI and the downlink DCI.

[0289] In some embodiments, the DCI in the DCI format 2-X is also called group common DCI or transmit power control (TPC) group DCI, that is, DCI sent to a terminal group.

[0290] In some embodiments, the size of the fifth DCI is W bits less than the size of the sixth DCI having DCI format 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

[0291] In some embodiments, the size of the fifth DCI is W bits less in the first field relative to the size of the corresponding sixth DCI, or the size of the fifth DCI is N bits less in the first field and K bits less in the second field relative to the size of the corresponding sixth DCI.

[0292] In some embodiments, the first field includes at least one of the following: NDI; UL indictor; SUL indictor.

[0293] In some embodiments, the second field is a FDRA field.

[0294] In some embodiments, for a sixth DCI scrambled by TC-RNTI in DCI format 0-0, if its size exceeds the size of the first DCI, a fifth DCI of the same size as the first DCI is obtained by taking into account that at least one of the NDI, UL indictor, and SUL indictor of the sixth DCI is missing a certain number of bits. If the fifth DCI cannot be obtained, the FDRA field of the sixth DCI is further reduced by a certain number of bits to achieve size alignment between the fifth DCI scrambled by TC-RNTI in DCI format 0-0 and the first DCI.

[0295] In some embodiments, the DCI format is 0-0 and at least one of the NDI, UL indictor and SUL indictor of the six DCIs encrypted by TC-RNTI is several bits less. The terminal can determine the priority of at least one of the NDI, UL indictor and SUL indictor that is several bits less based on protocol agreement or instructions from the network device.

[0296] Illustratively, the protocol stipulates or the network device indicates that the priority of at least one of NDI, UL indictor and SUL indictor is NDI less bits, UL indictor less bits and SUL indictor less bits, up to at least W bits.

[0297] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0298] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0299] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0300] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0301] In some embodiments, the terms "search space", "search space set", "search space configuration", "search space set configuration", "control resource set (CORESET)", "CORESET configuration" and the like may be used interchangeably.

[0302] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0303] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0304] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", "resource element (RE)", and "sub-carrier" can be used interchangeably.

[0305] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0306] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0307] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0308] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0309] The communication method involved in the embodiments of the present disclosure may include at least one of S201 to S203. For example, S201 may be implemented as an independent embodiment, S202 may be implemented as an independent embodiment, S203 may be implemented as an independent embodiment, S201+S203 may be implemented as an independent embodiment, and S202+S203 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0310] In some embodiments, S201 and S202 can be executed in a swapped order or simultaneously.

[0311] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0312] FIG4A is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG4A , the present disclosure embodiment relates to an information indication method, which includes:

[0313] S401A, the network device sends first configuration information to the terminal.

[0314] In some embodiments, the terminal receives first configuration information sent by the network device.

[0315] In some embodiments, the first configuration information is used to indicate a resource set used by the terminal to send at least one of the following messages: Msg1; MsgA PRACH; MsgA PUSCH.

[0316] In some embodiments, the resource set used includes at least one of time domain resources, frequency domain resources, and code domain resources.

[0317] In some embodiments, the name of the first configuration information is not limited, and it can be, for example, "first information", "resource indication information", etc.

[0318] In some embodiments, the network device sends the first configuration information to the terminal on its own, or sends the first configuration information to the terminal when specific conditions are met.

[0319] Exemplarily, upon receiving a request message sent by a terminal, where the request message is used to request the network device to configure resources used by the terminal for reporting the first indication information, the network device sends the first configuration information to the terminal.

[0320] Exemplarily, when the network device determines that it needs to obtain the first indication information of the terminal, for example, the network device needs to know whether the terminal supports receiving related signaling based on the size of the first DCI, the network device sends the first configuration information to the terminal.

[0321] In some embodiments, the network device sends the first configuration information to the terminal using existing signaling or messages, or sends the first configuration information to the terminal using new signaling or messages.

[0322] S402A, the terminal sends first indication information to the network device.

[0323] In some embodiments, the network device receives first indication information sent by the terminal.

[0324] In some embodiments, the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0325] In some embodiments, the name of the first indication information is not limited, and it can be, for example, "first information", "capability indication information", etc.

[0326] In some embodiments, the terminal sends the first indication information to the network device on its own, or sends the first indication information to the terminal when specific conditions are met.

[0327] Exemplarily, upon receiving the first configuration information sent by the network device, the terminal sends the first indication information to the network device.

[0328] Exemplarily, when determining that it is necessary to receive relevant signaling based on the size of the first DCI, the terminal sends first indication information to the network device.

[0329] In some embodiments, the terminal sends the first indication information to the network device using existing signaling or message, or sends the first indication information to the network device using new signaling or message.

[0330] In some embodiments, the terminal sends the first indication information to the network device, including: sending a message Msg1 to the network device, where Msg1 carries the first indication information; or sending a Msg3 to the network device, where Msg3 carries the first indication information; or sending a MsgA PRACH to the network device, where MsgA PRACH carries the first indication information; or sending a MsgA PUSCH to the network device, where MsgA PUSCH carries the first indication information.

[0331] In the embodiment of the present disclosure, the terminal sends Msg1 to the network device, where Msg1 carries first indication information.

[0332] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send Msg1, the terminal may use the resource set to send Msg1 to the network device.

[0333] In the embodiment of the present disclosure, the terminal sends Msg3 to the network device, where Msg3 carries first indication information.

[0334] In the embodiment of the present disclosure, the terminal sends a MsgA PRACH to the network device, where the MsgA PRACH carries first indication information.

[0335] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send MsgA PRACH, the terminal may use the resource set to send MsgA PRACH to the network device.

[0336] In the embodiment of the present disclosure, the terminal sends a MsgA PUSCH to the network device, where the MsgA PUSCH carries first indication information.

[0337] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send the MsgA PUSCH, the terminal may use the resource set to send the MsgA PUSCH to the network device.

[0338] In some embodiments, the terminal sends the first indication information to the network device using random access resources.

[0339] In some embodiments, Msg3 carries the first indication information, including: using the reserved field in the Msg3MACPDU to carry the first indication information; or using a new MACCE to carry the first indication information; or reusing the existing MACCE to carry the first indication information; or using the reserved bit in the RRC signaling carried by Msg3 to carry the first indication information; or using a new LCID to carry the first indication information.

[0340] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the reserved field in the Msg3 media access control protocol data unit (MAC PDU) may be used to carry the first indication information.

[0341] In the embodiment of the present disclosure, Msg3 carries the first indication information, and a new medium access control control element (MAC CE) may be used to carry the first indication information.

[0342] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the existing MACCE may be reused to carry the first indication information.

[0343] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the reserved bits in the radio resource control (RRC) signaling carried by Msg3 may be used to carry the first indication information.

[0344] In the embodiment of the present disclosure, Msg3 carries the first indication information, and a new logical channel identity (LCID) may be used to carry the first indication information.

[0345] In some embodiments, the relevant signaling includes at least one of the following: the DCI format of RA-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 0-0; the DCI format of MsgB-RNTI scrambled is DCI in 1-0; the DCI format of C-RNTI scrambled is DCI in 0-0; the DCI format of C-RNTI scrambled is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

[0346] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, and the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 1-0 with random access radio network temporary identity (RA-RNTI) scrambled based on the size of the first DCI.

[0347] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 1-0 that is TC-RNTI scrambled based on the size of the first DCI.

[0348] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 0-0 that is TC-RNTI scrambled based on the size of the first DCI.

[0349] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 1-0 that is MsgB-RNTI-scrambled based on the size of the first DCI.

[0350] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 0-0 that is C-RNTI-scrambled based on the size of the first DCI.

[0351] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of DCI in DCI format 1-0 that is C-RNTI-scrambled based on the size of the first DCI.

[0352] In an embodiment of the present disclosure, the terminal sends first indication information to the network device, where the first indication information is used to indicate that the terminal supports reception of the Msg2 PDSCH based on the size of the first DCI.

[0353] In an embodiment of the present disclosure, a terminal sends first indication information to a network device, where the first indication information is used to indicate that the terminal supports reception of an MsgB PDSCH based on a first DCI size.

[0354] In an embodiment of the present disclosure, a terminal sends first indication information to a network device, where the first indication information is used to indicate that the terminal supports reception of a Msg4 PDSCH based on a size of a first DCI.

[0355] The communication method involved in the embodiments of the present disclosure may include at least one of S401A to S402A. For example, S401A may be implemented as an independent embodiment, and S402A may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0356] FIG4B is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG4B , the present disclosure embodiment relates to an information indication method, which includes:

[0357] S401B: The network device sends second configuration information to the terminal.

[0358] In some embodiments, the terminal receives second configuration information sent by the network device.

[0359] In some embodiments, the second configuration information is used to indicate the first threshold.

[0360] In some embodiments, the name of the second configuration information is not limited, and it can be, for example, "configuration information", "threshold indication information", etc.

[0361] In some embodiments, the network device sends the second configuration information to the terminal on its own, or sends the second configuration information to the terminal when specific conditions are met.

[0362] Exemplarily, when the network device determines that it needs to obtain the first indication information of the terminal, for example, the network device needs to know whether the terminal supports receiving related signaling based on the size of the first DCI, the network device sends the first configuration information to the terminal.

[0363] In some embodiments, the network device sends the second configuration information to the terminal using existing signaling or message, or sends the second configuration information to the terminal using new signaling or message.

[0364] S402B: When determining that the RSRP of the SSB is lower than the first threshold, the terminal sends first indication information to the network device.

[0365] In some embodiments, the network device receives first indication information sent by the terminal when it determines that the RSRP of the SSB is lower than the first threshold.

[0366] In some embodiments, the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0367] In some embodiments, the name of the first indication information is not limited, and it can be, for example, "first information", "capability indication information", etc.

[0368] In some embodiments, the terminal sends the first indication information to the network device using existing signaling or message, or sends the first indication information to the network device using new signaling or message.

[0369] In some embodiments, the terminal sends the first indication information to the network device, including: sending a message Msg1 to the network device, where Msg1 carries the first indication information; or sending a Msg3 to the network device, where Msg3 carries the first indication information; or sending a MsgA PRACH to the network device, where MsgA PRACH carries the first indication information; or sending a MsgA PUSCH to the network device, where MsgA PUSCH carries the first indication information.

[0370] In the embodiment of the present disclosure, the terminal sends Msg1 to the network device, where Msg1 carries first indication information.

[0371] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send Msg1, the terminal may use the resource set to send Msg1 to the network device.

[0372] In the embodiment of the present disclosure, the terminal sends Msg3 to the network device, where Msg3 carries first indication information.

[0373] In the embodiment of the present disclosure, the terminal sends a MsgA PRACH to the network device, where the MsgA PRACH carries first indication information.

[0374] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send MsgA PRACH, the terminal may use the resource set to send MsgA PRACH to the network device.

[0375] In the embodiment of the present disclosure, the terminal sends a MsgA PUSCH to the network device, where the MsgA PUSCH carries first indication information.

[0376] In some embodiments, when the terminal receives first configuration information sent by the network device, where the first configuration information is used to indicate a resource set used by the terminal to send the MsgA PUSCH, the terminal may use the resource set to send the MsgA PUSCH to the network device.

[0377] In some embodiments, the terminal sends the first indication information to the network device using random access resources.

[0378] In some embodiments, Msg3 carries first indication information including:

[0379] Use the reserved field in the Msg3 MAC PDU to carry the first indication information; or

[0380] Use a new MACCE to carry the first indication information; or

[0381] Reusing an existing MACCE to carry the first indication information; or

[0382] Use the reserved bits in the RRC signaling carried by Msg3 to carry the first indication information; or

[0383] The new LCID is used to carry the first indication information.

[0384] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the reserved field in the Msg3 media access control protocol data unit (MAC PDU) may be used to carry the first indication information.

[0385] In the embodiment of the present disclosure, Msg3 carries the first indication information, and a new medium access control control element (MAC CE) may be used to carry the first indication information.

[0386] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the existing MACCE may be reused to carry the first indication information.

[0387] In the embodiment of the present disclosure, Msg3 carries the first indication information, and the reserved bits in the radio resource control (RRC) signaling carried by Msg3 may be used to carry the first indication information.

[0388] In the embodiment of the present disclosure, Msg3 carries the first indication information, and a new logical channel identity (LCID) may be used to carry the first indication information.

[0389] In some embodiments, the related signaling includes at least one of the following: the DCI format of RA-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 1-0; the DCI format of TC-RNTI scrambled is DCI in 0-0; the DCI format of MsgB-RNTI scrambled is DCI in 1-0; the DCI format of C-RNTI scrambled is DCI in 0-0; the DCI format of C-RNTI scrambled is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

[0390] In some embodiments, different related signalings correspond to different first thresholds for a plurality of related signalings; and / or different first thresholds are associated with different PRACH resource sets.

[0391] It is understandable that, considering that not all terminals require coverage enhancement for RAR PDCCH, Msg4 PDCCH, etc., further consideration is given to reporting the downlink coverage enhancement capability / downlink coverage enhancement request of the terminal.

[0392] In some embodiments, the terminal may report terminal capability or coverage enhancement request through at least one of Msg1, Msg3, MsgA PRACH, and MsgA PUSCH.

[0393] Optionally, for reporting of coverage enhancement request, a certain RSRP threshold is configured for it, and when the RSRP of the SSB measured by the terminal is lower than the threshold (threshold), the coverage enhancement request is reported.

[0394] Optionally, for reporting terminal coverage enhancement capability, if the terminal has this capability, it reports the terminal capability through at least one of Msg1, Msg3, MsgA PRACH, and MsgA PUSCH; or when the network device is not configured with an RSRP threshold, the terminal reports the terminal capability based on random access resources.

[0395] In some embodiments, Msg2 DCI, MsgB DCI, and Msg4 DCI may perform unified capability reporting or unified coverage enhancement request design, or may have independent designs.

[0396] Among them, if they have independent designs, then: different DCIs have their own corresponding Msg1, Msg3, MsgA PRACH, MsgA PUSCH and / or corresponding RSRP thresholds, for example, Msg2 DCI (compact Msg2 DCI) with the same size as the first DCI + Msg3 DCI (non-compact Msg3 DCI) with the same size as the second DCI + Msg4 DCI (non-compact Msg4 DCI) with the same size as the second DCI have a set of independent resources; Msg2 DCI (non-compact Msg2 DCI) with the same size as the second DCI + Msg3 DCI (non-compact Msg3 DCI) with the same size as the second DCI + Msg4 DCI (compact Msg4 DCI) with the same size as the first DCI have a set of independent resources; Msg2 DCI (non-compact Msg2 DCI) with the same size as the second DCI + Msg3 DCI (compact Msg3 DCI) with the same size as the first DCI have a set of independent resources; DCI) + Msg4 DCI (non-compact Msg4 DCI) of the same size as the second DCI has a set of independent resources; Msg2 DCI (compact Msg2 DCI) of the same size as the first DCI + Msg3 DCI (compact Msg3 DCI) of the same size as the first DCI + Msg4 DCI (non-compact Msg4 DCI) of the same size as the second DCI has a set of independent resources, etc.

[0397] In some embodiments, Msg2 DCI, Msg3 DCI, Msg4 DCI and Msg2 PDSCH, Msg3 PDSCH, Msg4 PDSCH can have a unified capability reporting and coverage enhancement request reporting design, or they can have their own independent designs.

[0398] PDSCH and DCI have a unified capability reporting and / or coverage enhancement request reporting design, that is, both use the same resource set and RSRP threshold, and the RSRP threshold can be configured for a worse channel.

[0399] Another possible approach is that the two have different resource sets and RSRP thresholds.

[0400] In addition, a more flexible design approach is that the capability reporting / coverage enhancement request configuration parameters between Msg2 DCI, Msg3 DCI, and Msg4 DCI are the same or different, and the capability reporting / coverage enhancement request configuration parameters between Msg2 DCI, Msg3 DCI, and Msg4 DCI and their respective PDSCHs are the same or different.

[0401] The communication method involved in the embodiments of the present disclosure may include at least one of S401B to S402B. For example, S401B may be implemented as an independent embodiment, and S402B may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0402] FIG5A is a flow chart of a DCI transmission method according to an embodiment of the present disclosure. As shown in FIG5A , the embodiment of the present disclosure relates to a DCI transmission method, which is executed by a terminal and includes:

[0403] S501A: Determine the size of the first DCI.

[0404] Among them, the optional implementation of S501A can refer to the optional implementation of S202 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0405] In some embodiments, the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI.

[0406] S502A: Obtain the first DCI according to the size of the first DCI.

[0407] Among them, the optional implementation of S502A can refer to the optional implementation of S203 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0408] In some embodiments, the terminal receives the first DCI sent by the network device, but is not limited thereto and may also receive the first DCI sent by other entities.

[0409] In some embodiments, the terminal obtains a first DCI specified by a protocol.

[0410] In some embodiments, the terminal obtains the first DCI from upper layer(s).

[0411] In some embodiments, the terminal performs processing to obtain the first DCI.

[0412] In some embodiments, S502A is omitted, and the terminal autonomously implements the function indicated by the first DCI, or the above function is default or by default.

[0413] The communication method involved in the embodiments of the present disclosure may include at least one of S501A to S502A. For example, S501A may be implemented as an independent embodiment, and S502A may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0414] FIG5B is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG5B , the embodiment of the present disclosure relates to an information indication method, which is executed by a terminal and includes:

[0415] S501B, obtain first configuration information.

[0416] Among them, the optional implementation of S501B can refer to the optional implementation of S401A in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0417] In some embodiments, the terminal receives the first configuration information sent by the network device, but is not limited thereto, and may also receive the first configuration information sent by other entities.

[0418] In some embodiments, the terminal obtains first configuration information specified by a protocol.

[0419] In some embodiments, the terminal obtains the first configuration information from an upper layer(s).

[0420] In some embodiments, the terminal performs processing to obtain the first configuration information.

[0421] In some embodiments, S501B is omitted, and the terminal autonomously implements the function indicated by the first configuration information, or the above function is default or acquiescent.

[0422] In some embodiments, the first configuration information is used to indicate a resource set used by the terminal to send at least one of the following messages: Msg1; MsgA PRACH; MsgA PUSCH.

[0423] In some embodiments, the resource set used includes at least one of time domain resources, frequency domain resources, and code domain resources.

[0424] S502B, sending first indication information.

[0425] Among them, the optional implementation of S502B can refer to the optional implementation of S402A in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0426] In some embodiments, the terminal sends the first indication information to the network device, but is not limited thereto, and the first indication information may also be sent to other entities.

[0427] Optionally, the first indication information is used by the network device to send relevant signaling to the terminal based on the size of the first DCI.

[0428] In some embodiments, the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0429] The communication method involved in the embodiments of the present disclosure may include at least one of S501B to S502B. For example, S501B may be implemented as an independent embodiment, and S502B may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0430] FIG5C is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG5C , the present disclosure embodiment relates to an information indication method, which is executed by a terminal and includes:

[0431] S501C: Obtain second configuration information.

[0432] Among them, the optional implementation of S501C can refer to the optional implementation of S401B in Figure 4B and other related parts in the embodiment involved in Figure 4B, which will not be repeated here.

[0433] In some embodiments, the terminal receives the second configuration information sent by the network device, but is not limited thereto, and may also receive the second configuration information sent by other entities.

[0434] In some embodiments, the terminal obtains second configuration information specified by the protocol.

[0435] In some embodiments, the terminal obtains the second configuration information from an upper layer(s).

[0436] In some embodiments, the terminal performs processing to obtain the second configuration information.

[0437] In some embodiments, S501C is omitted, and the terminal autonomously implements the function indicated by the second configuration information, or the above function is default or acquiescent.

[0438] In some embodiments, the second configuration information is used to indicate the first threshold.

[0439] S502C: When it is determined that the RSRP of the SSB is lower than the first threshold, send first indication information.

[0440] Among them, the optional implementation of S502C can refer to the optional implementation of S402B in Figure 4B and other related parts in the embodiment involved in Figure 4B, which will not be repeated here.

[0441] The communication method involved in the embodiments of the present disclosure may include at least one of S501C to S502C. For example, S501C may be implemented as an independent embodiment, and S502C may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0442] FIG6A is a flow chart of a DCI transmission method according to an embodiment of the present disclosure. As shown in FIG6A , the embodiment of the present disclosure relates to a DCI transmission method, which is executed by a network device and includes:

[0443] S601A, determine the size of the first DCI.

[0444] Among them, the optional implementation of S601A can refer to the optional implementation of S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0445] In some embodiments, the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI.

[0446] S602A: Send the first DCI according to the size of the first DCI.

[0447] Among them, the optional implementation of S602A can refer to the optional implementation of S203 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0448] In some embodiments, the network device sends the first DCI to the terminal, but is not limited thereto and may also send the first DCI to other entities.

[0449] The communication method involved in the embodiments of the present disclosure may include at least one of S601A to S602A. For example, S601A may be implemented as an independent embodiment, and S602A may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0450] FIG6B is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG6B , the embodiment of the present disclosure relates to an information indication method, which is executed by a network device and includes:

[0451] S601B, send first configuration information.

[0452] Among them, the optional implementation of S601B can refer to the optional implementation of S401A in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0453] In some embodiments, the network device sends the first configuration information to the terminal, but is not limited thereto, and the first configuration information may also be sent to other entities.

[0454] In some embodiments, the first configuration information is used to indicate a resource set used by the terminal to send at least one of the following messages:

[0455] Msg1;

[0456] MsgA PRACH;

[0457] MsgA PUSCH.

[0458] In some embodiments, the resource set used includes at least one of time domain resources, frequency domain resources, and code domain resources.

[0459] Optionally, the first configuration information is used by the terminal to send at least one of Msg1, MsgA PRACH, and MsgA PUSCH to the network device using the resources indicated by the first configuration information, wherein at least one of Msg1, MsgA PRACH, and MsgA PUSCH carries the first indication information. For optional implementations thereof, refer to the optional implementation of S402A in FIG. 4A and other related parts of the embodiment involved in FIG. 4A , which will not be repeated here.

[0460] S602B: Obtain first indication information.

[0461] Among them, the optional implementation of S602B can refer to the optional implementation of S402A in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0462] In some embodiments, the network device receives the first indication information sent by the terminal, but is not limited thereto, and may also receive the first indication information sent by other entities.

[0463] In some embodiments, the network device obtains first indication information specified by a protocol.

[0464] In some embodiments, the network device obtains the first indication information from an upper layer(s).

[0465] In some embodiments, the network device performs processing to obtain the first indication information.

[0466] In some embodiments, S602B is omitted, and the network device autonomously implements the function indicated by the first indication information, or the above function is default or by default.

[0467] In some embodiments, the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0468] The communication method involved in the embodiments of the present disclosure may include at least one of S601B to S602B. For example, S601B may be implemented as an independent embodiment, and S602B may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0469] FIG6C is an interactive diagram of an information indication method according to an embodiment of the present disclosure. As shown in FIG6C , the embodiment of the present disclosure relates to an information indication method, which is executed by a network device and includes:

[0470] S601C: Send second configuration information.

[0471] Among them, the optional implementation of S601C can refer to the optional implementation of S401B in Figure 4B and other related parts in the embodiment involved in Figure 4B, which will not be repeated here.

[0472] In some embodiments, the network device sends the second configuration information to the terminal, but is not limited thereto, and the second configuration information may also be sent to other entities.

[0473] In some embodiments, the second configuration information is used to indicate the first threshold.

[0474] Optionally, the first configuration information is used by the terminal to send first indication information to the network device when the RSRP of the SSB is lower than the first threshold. Its optional implementation method can be referred to the optional implementation method of S402B in Figure 4B and other related parts in the embodiment involved in Figure 4B, which will not be repeated here.

[0475] S602C: Obtain first indication information.

[0476] Among them, the optional implementation of S602C can refer to the optional implementation of S402B in Figure 4B and other related parts in the embodiment involved in Figure 4B, which will not be repeated here.

[0477] In some embodiments, the network device receives the first indication information sent by the terminal when the RSRP of the SSB is lower than the first threshold, but is not limited to this, and can also receive the first indication information sent by other entities.

[0478] In some embodiments, the network device obtains first indication information specified by a protocol.

[0479] In some embodiments, the network device obtains the first indication information from an upper layer(s).

[0480] In some embodiments, the network device performs processing to obtain the first indication information.

[0481] In some embodiments, S602C is omitted, and the network device autonomously implements the function indicated by the first indication information, or the above function is default or acquiescent.

[0482] In some embodiments, the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

[0483] The communication method involved in the embodiment of the present disclosure may include at least one of S601C to S602C. For example, S601C may be implemented as an independent embodiment, and S602C may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0484] In some embodiments, in a non-terrestrial network (NTN), downlink coverage may be limited because a satellite must simultaneously transmit multiple beams to achieve coverage and cannot concentrate energy in one beam.

[0485] Gap = Required SNR - CNR, LEO - 600 km.

[0486] Table 1

[0487] According to the simulation results shown in Table 1 above, when the number of beam splitting is 8, there is a 2-3dB gap between the PDCCH and the common PDSCH, which basically meets the requirements for voice over internet protocol (VoIP) transmission. When the rate is increased and a higher MCS is used, there is a 4dB gap.

[0488] In some embodiments, the DL fallback DCI content in Rel-15 is:

[0489] As shown in Table 2 below, the DCI format scrambled by the system information radio network temporary identifier (SI-RNTI) is 1-0 content: 28 bits + FDRA bits.

[0490] Table 2

[0491] In some embodiments, as shown in Table 3 below, the DCI format scrambled by the paging radio network temporary identifier (P-RNTI) is 1-0 content: 28 bits + FDRA bits.

[0492] Table 3

[0493] As shown in Table 4 below, Short Message Indicator.

[0494] Table 4

[0495] In some embodiments, as shown in Table 5 below, the DCI format scrambled by RA-RNTI or by MsgB-RNTI is 1-0 content: 28 bits + FDRA bits.

[0496] Table 5

[0497] In some embodiments, as shown in Table 6 below, N of P-RNTI, RA-RNTI and MSGB-RNTI info Scaling factor.

[0498] Table 6

[0499] In some embodiments, as shown in Table 7 below, the DCI format scrambled by TC-RNTI is 1-0 content: 28+FDRA bits.

[0500] Table 7

[0501] In some embodiments, as shown in Table 8 below, the DCI format scrambled by C / CS / MCS-C-RNTI is 1-0 content: 28+FDRA field.

[0502] Table 8

[0503] In some embodiments, as shown in Table 9 below, the DCI format scrambled by the C-RNTI during random access is 1-0 content: 28 bits + FDRA field.

[0504] Table 9

[0505] In some embodiments, as shown in Table 10 below, the DCI format 0-0 scrambled by TC-RNTI contains: 21 bits + FDRA + padding bits (if any).

[0506] Table 10

[0507] In some embodiments, as shown in Table 11 below, the DCI format 0-0 scrambled by C / CS / MCS-C-RNTI contains: 21 bits + FDRA + padding bits (if any).

[0508] Table 11

[0509] In some embodiments, the C- / CS- / MCS-C-RNTI is transmitted in the CSS.

[0510] -Type A 3-PDCCH CSS, applicable only to primary cells

[0511] - If Type 3 - PDCCH CSS set, or USS set is not provided, then Type 1 - PDCCH CSS set

[0512] - If a terminal is provided

[0513] - One or more search space sets consisting of corresponding one or more search space zero, search space SIB1, search space other system information, paging search space, RA-search space, and

[0514] - A cell-radio network temporary identifier (C-RNTI), a modulation and coding scheme-C-RNTI (MCS-C-RNTI), or a configured scheduling-RNTI (CS-RNTI);

[0515] The terminal monitors PDCCH candidates with DCI format 0-0 and DCI format 1-0, and the cyclic redundancy check (CRC) is scrambled by C-RNTI, MCS-C-RNTI, or CS-RNTI in one or more search space sets. The UE monitors PDCCH candidates with at least DCI format 0-0 or DCI format 1-0, and the CRC is scrambled by SI-RNTI, random access radio network temporary identity (RA-RNTI), MsgB-RNTI, or P-RNTI.

[0516] In some embodiments, the fallback DCI size is aligned.

[0517] -Step 0:

[0518] - N_BWP in DCI format 0-0 is the initial UL BWP, and in DCI format 0-1 is CORESET#0 or the initial DL BWP;

[0519] - If DCI format in CSS is 0-0 is less than DCI format in CSS is 1-0, then zero padding bits are generated, otherwise if it is greater, then the left most significant bit of FDRA in DCI format 1-0 is truncated.

[0520] -Step 1:

[0521] - N_BWP in DCI format 0-0 and DCI format 1-0 is the activated BWP;

[0522] - Generate zero padding bits for the smaller DCI 0-0 in the USS between SUL and UL;

[0523] - If less than DCI format 1-0, zero padding bits are generated for the smaller DCI between DCI format 0-0 and DCI format 1-0 in the USS.

[0524] - Step 2: If DCI format is 0-1 or DCI format 1-1 is equal to DCI format 1-0 / 0-0 in USS, one padding bit will be appended.

[0525] -Step 4A: (will be executed if the sum of different DCI sizes exceeds 4 or the DCI size of the C-RNTI is greater than 3)

[0526] - Delete the padding bits (if any) of the non-fallback DCI in step 2;

[0527] - Perform step 0 for DCI format 0-0 in USS.

[0528] In some embodiments, the DCI format is 2-x DCI size aligned.

[0529] - The number of information bits for the following DCI formats shall be equal to or less than the payload size for DCI format 1-0 in the CSS; if less than DCI format 1-0 in the CSS, zeros shall be appended to DCI format 2-X:

[0530] - DCI format 2-2 scrambled by TPC-PUSCH-RNTI or TPC-PUCCH-RNTI: used for TPC commands for PUCCH or PUSCH;

[0531] - DCI format 2-3 is scrambled by TPC-SRS-RNTI.

[0532] In some embodiments, SI-RNTI PDCCH candidates are determined.

[0533] - Type 0 - The PDCCH CSS set is defined by the number of PDCCH candidates per CCE aggregation level given in Table 12 below.

[0534] In some embodiments, the CCE aggregation level of the CSS set and the maximum number of PDCCH candidates for each CCE aggregation level are configured by serchSpaceSIB1.

[0535] Table 12

[0536] In some embodiments, the CCE of each PDCCH candidate may be determined by the following formula specified below.

[0537] -Assumption: The number of RBs in CORESET#0 is 96 RBs, 2OS--32CCE.

[0538] In some embodiments, SIB1 repeats time.

[0539] SIB1 is transmitted on DL-SCH with a period of 160ms. The variable transmission repetition period is within 160ms. The default transmission repetition period of SIB1 is 20 milliseconds, but the actual transmission repetition period depends on the network implementation.

[0540] For SSB and CORESET multiplexing mode 1, the SIB1 repetition transmission period is 20ms. For SSB and CORESET multiplexing mode 2 / 3, the SIBI transmission repetition period is the same as the SSB period. SIB1 includes information about the availability and scheduling of other SIBs (e.g., SIB to SI message mapping, periodicity, SI window size), and indicates whether one or more SIBs are only provided on demand. In this case, the UE performs the configuration required for the SI request. SIB1 is a cell-specific SIB.

[0541] In some embodiments, the CSS#0 assay in Rel-15.

[0542] -SSB&CORESET#0 multiplexing mode 1

[0543] The terminal monitors the PDCCH in CSS#0 for multiplexing mode 1 in two consecutive time slots starting from time slot n;

[0544] Multiplexing mode 1 can be used in FR1 and FR2;

[0545] In some embodiments, the values ​​of M and O are shown in Table 13 below.

[0546] As shown in Table 13 below: Parameters for PDCCH monitoring scenarios for Type 0 PDCCH CSS Group - SS / PBCH Block and CORESET multiplexing mode 1 and FR1.

[0547] Table 13

[0548] Assumptions: SSB Case C - 30kHz SCS with {2, 8} + 14, n = 0 ~ 3, CORESET duration = 3OS 30kHz SCS

[0549] -A1: As shown in FIG3A , for index = 1 in Table 38.213 in TS 13-11, the PMO is located in the first 5 slots of the even frame (10 slots in a frame)

[0550] - A2: As shown in FIG3B , for index = 9 38.213 in TS 13-11, the PMO position of each SSB index.

[0551] For the above assumptions, the temporal position of SSB within the half frame is shown in Table 14 below.

[0552] Table 14

[0553] For the first two time slots, the SSB time domain resource location operating system is shown in Table 15 below.

[0554] Table 15

[0555] In some embodiments, SSB & CORESET#0 multiplex mode 2.

[0556] As shown in Table 16 below, when {SS / PBCH block, PDCCH} SCS is {120, 60} kHz, the resource blocks of the 0-PDCCH type search space set and the time slot symbol set of the CORESET are set.

[0557] Table 16

[0558] As shown in Table 17 below, when {SS / PBCH block, PDCCH} SCS is {240, 120} kHz, the resource blocks and time slot symbol sets of CORESET are set for the 0-PDCCH type search space.

[0559] Table 17

[0560] For SS / PBCH blocks and CORESET multiplexing modes 2 and 3, the UE monitors the PDCCHs in the Type0-PDCCH CSS set in one slot with a Type0-PDCCH CSS set periodicity equal to the periodicity of the SS / PBCH block. For SS / PBCH blocks and CORESET multiplexing modes 2 and 3, if the active DL BWP is the initial DL BWP, the UE shall be able to perform radio link monitoring as described in clause 5 and make radio resource management measurements using the SS / PBCH block that provides the CORESET for the Type0-PDCCH CSS set. For SS / PBCH block index i, the terminal determines the slot index n according to the parameters provided in Tables 13-13 to 13-15. c and SFN c .

[0561] As shown in Table 18 below, the SS / PBCH blocks and CORESET multiplexing mode 2 and {SS / PBCH blocks, PDCCH} SCS {120, 60} kHz are configured for the 0-PDCCH CSS.

[0562] Table 18

[0563] As shown in Table 19 below, 0-PDCCH CSS setting - SS / PBCH block and CORESET multiplexing mode 2 and {SS / PBCH block, PDCCH} SCS {240, 120} kHz.

[0564] Table 19

[0565] For multiplexing mode 2 in FR2, assume: Case D - 120kHz SCS: The first symbol of the candidate SS / PBCH block has index {4, 8, 16, 20} + 28*n. For carrier frequencies within FR2, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. The duration of CORESET#0 is 1OS with 60kHz SCS.

[0566] - For 60kHz SCS, there is an SSB time slot with 120kHz SCS as shown in FIG7A.

[0567] In some embodiments, SSB & CORESET #0 multiplexing mode 3

[0568] For SS / PBCH blocks and CORESET multiplexing modes 2 and 3, the UE monitors the PDCCHs in the Type0-PDCCH CSS set in one slot with a Type0-PDCCH CSS set periodicity equal to the periodicity of the SS / PBCH block. For SS / PBCH blocks and CORESET multiplexing modes 2 and 3, if the active DL BWP is the initial DL BWP, the UE shall be able to perform radio link monitoring as described in clause 5 and make radio resource management measurements [10, TS 38.133] using the SS / PBCH block that provides the CORESET for the Type0-PDCCH CSS set. For the SS / PBCH block with index i, the UE determines the slot index n according to the parameters provided in Tables 13-13 to 13-15. c and SFN c .

[0569] As shown in Table 20 below: When {SS / PBCH block, PDCCH}SCS is {120,120}kHz, the resource block of the 0-PDCCH type search space and the time slot symbol set of CORESET are set.

[0570] Table 20

[0571] As shown in Table 21 below: Type 0 - PDCCH CSS setting - SS / PBCH block and CORESET multiplexing mode 3 and PDCCH monitoring opportunity of {SS / PBCH block, PDCCH}SCS{120,120}kHz.

[0572] Table 21

[0573] -SSB&CORESET#0 multiplexing mode example 3

[0574] For multiplexing mode 2 in FR2, assume: Case D – 120kHz SCS: The first symbol of the candidate SSB has index {4, 8, 16, 20} + 28*n. For carrier frequencies in FR2, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. The duration of CORESET#0 is 2OS with 120kHz SCS

[0575] For a time slot with a 60 kHz SCS, as shown in FIG. 7B , there is an SSB with a 120 kHz SCS.

[0576] In some embodiments, the number of DCI sizes is limited.

[0577] If the terminal is provided with one or more search space sets, one or more search space sets in the CSS set set by searchSpaceZero, searchSpaceSIB1, searchSpaceOtherSystemInformation, pagingSearchSpace, ra-SearchSpace, or PDCCH-Config, and an SI-RNTI, a P-RNTI, a RA-RNTI, a MsgB-RNTI, an SFI-RNTI, an INT-RNTI, aTPC-PUSCH-RNTI, a TPC-PUCCH-RNTI, or a TPC-SRS-RNTI

[0578] Then, for an RNTI from any of these RNTIs, the terminal does not wish to process information from multiple DCI formats where the CRC is scrambled with the RNTI in each slot.

[0579] In some embodiments, no more than one DCI is processed per RNTI in a Type 0 CSS, Type 0A CSS, Type 1 CSS, Type 2 CSS, Type 3 CSS, excluding unicast DCI per timeslot (to clarify that "DCI" refers to "consistent DCI").

[0580] In the embodiment of the present disclosure, after the terminal successfully receives the SSB, the first channel received with a performance gap is the PDCCH channel scheduling SIB1, and this channel needs to be enhanced.

[0581] Question 1: For SIB1 PDCCH channel enhancement, one possible approach is to introduce compact DCI to SI-RNTI DCI, that is, to reduce the payload size of SIB1 DCI.

[0582] Downlink CSS DCI format 1-0, such as paging DCI, SIB1 DCI, and Msg2 / 4 DCI, has a uniform size. Therefore, it is necessary to consider how to design a reasonable method to reduce the SIB1 DCI payload size.

[0583] - Downlink DCI size reduction will cause problems with uplink DCI size alignment, so further consideration may be needed on how to determine the DCI alignment rule.

[0584] Question 2: It is also necessary to consider how to transmit the compact SIB1 DCI (such as the first DCI in the above embodiment, the same below) to minimize the impact on legacy terminals.

[0585] In some embodiments, an enhanced solution for PDCCH scheduling SIB1: DCI size reduction.

[0586] Solution 1: One possible implementation is that when reducing the payload size of the SIB1 DCI (such as the second DCI in the aforementioned embodiment, the same below), all DCI formats 1-0 (transmitted in the USS and CSS) are reduced by M bits.

[0587] Optionally, bit reduction can be performed only for CSS DCI formats 1-0.

[0588] - The fields that may have their bits trimmed include at least one or more of the following:

[0589] ○ The upper bits of the MCS; further, the lower bits of the MCS can only be used to indicate the lower rows of the MCS table, or the MCS table is redefined in the protocol, or the MCS table can be configured by the base station (if not configured, the MCS table in the protocol is used);

[0590] ○ Several reserved bits;

[0591] ○ One or more bits in the TBS scaling field. Considering the coverage-limited scenario, downlink PDSCH transmission is also limited. Therefore, all TBS scaling bits can be removed. Furthermore, for scheduling under coverage-limited cases, the TBS scaling factor of Msg2 / MsgB / paging PDSCH is fixed to 0.25; alternatively, one bit in the TBS scaling field is removed, and the other bit is used to indicate {1, 0.25} or {0.5, 0.25}, etc.;

[0592] ○ VRB to PRB mapping field. Distributed resource mapping can obtain diversity gain, and for localized resource mapping, if the coherent bandwidth is large, the terminal can use the DMRS on multiple PRBs for joint channel estimation, which can obtain more accurate channel estimation performance. Taking into account that for broadcast DCI, the channel states from different terminals to the base station are different, or there is no CSI feedback in the initial access phase, it is difficult for the base station to determine whether to use distributed resource mapping or localized resource mapping, so it can be considered to remove this bit. Accordingly, the protocol defaults to non-interleaved VRB-to-PRB mapping, or defaults to interleaved VRB-to-PRB mapping;

[0593] ○DAI field;

[0594] o At least one bit in the FDRA field.

[0595] - For different types of DCI, such as paging DCI, SIB1 DCI, OSI DCI, Msg2 DCI, MsgB DCI, Msg4 DCI, etc., different DCIs can delete at least one bit in different fields. The final payload size of different DCIs must be consistent

[0596] - In the above method, if the value of M is large, the size alignment between DCI format 0-0 in USS / CSS and DCI format 1-0 may be further affected: too many bits are lost in the FDRA field in DCI format 0-0, so further enhancement of this DCI needs to be considered.

[0597] When aligning DCI format 0-0 with compact DCI 1-0, consider the following:

[0598] For TC-RNTI DCI format 0-0, if its length exceeds that of compact DCI format 1-0, consider removing the NDI and / or UL / SUL indictor bits. If the length after removal still exceeds that of compact DCI format 1-0, further reduce the upper bits of the FDRA field to achieve size alignment between the two.

[0599] ○ The removal priority of NDI and UL / SUL indictors is determined by the protocol or configured by the base station.

[0600] - In this solution, considering that not all terminals require coverage enhancement for RAR PDCCH, Msg4 PDCCH, etc., further consideration is given to designing the terminal's DL coverage enhancement capability reporting / DL coverage enhancement request.

[0601] ○ The terminal can report terminal capabilities or request coverage enhancement through Msg1 / 3 / MsgA PRACH / MsgA PUSCH

[0602] ○Optionally, for coverage request, configure a certain RSRP threshold for it. When the SSB RSRP measured by the terminal is lower than the threshold, a coverage enhancement request is made.

[0603] ○Optional, for terminal coverage capability reporting, if the terminal has this capability, it reports the terminal capability through Msg1 / Msg3 / MsgA PRACH / MsgA PUSCH, etc.; or when the base station is not configured with RSRP threshold, the terminal reports the terminal capability based on random access resources

[0604] ○ Msg2 DCI, Msg3 DCI, and Msg4 DCI can be designed as a unified capability reporting / coverage enhancement request, or they can have independent designs. If they have independent designs, then:

[0605] ○ Different DCIs have their own corresponding Msg1 / 3 / MsgA PRACH / MsgA PUSCH and / or corresponding RSRP thresholds, for example, compact Msg2 DCI+non-compact Msg3 DCI+non-compact Msg4 DCI has a set of independent resources; non-compact Msg2 DCI+non-compact Msg3 DCI+compact Msg4 DCI has a set of independent resources; non-compact Msg2 DCI+compact Msg3 DCI+non-compact Msg4 DCI has a set of independent resources; compact Msg2 DCI+compact Msg3 DCI+non-compact Msg4 DCI has a set of independent resources, etc.

[0606] ○ In addition, Msg2 / 3 / 4 DCI and Msg2 / 3 / 4 PDSCH can have a unified capability reporting and coverage enhancement request design, or they can have their own independent designs. For example,

[0607] ○ PDSCH and DCI have a unified capability reporting and / or CE request reporting design, that is, both use the same resource set and RSRP threshold, and the threshold can be configured for the worse channel

[0608] ○ Another possible approach is to have different resource sets and RSRP thresholds for the two.

[0609] ○ In addition, a more flexible design is that the capability reporting / request configuration parameters between Msg2 / 3 / 4 DCI are the same or different, and the capability reporting / request configuration parameters between msg2 / 3 / 4 DCI and their respective PDSCH are the same or different

[0610] Solution 2: Another possible implementation is to introduce a separate DCI size for SIB1 DCI only, without considering other DCI formats 1-0 in CSS and / or in USS when reducing the SIB1 DCI payload size. (Since other DCIs are also received with SIB1 configuration, other enhancements can be considered.)

[0611] One possible approach is to enhance at least one of the following fields in the SIB1 DCI: At least some of the reserve bits; VRB-to-PRB mapping; the upper few bits of the MCS (same design as above).

[0612] - Optionally, for this DCI size, the total number of different DCI sizes configured for monitoring does not count towards the existing protocol limit on the number of DCI sizes: the total number of different DCI sizes configured for monitoring does not exceed 4. Alternatively, for UEs supporting SIB1compact DCI, the DCI size limit is: - the total number of different DCI sizes configured for monitoring does not exceed 5.

[0613] For legacy UEs, since there is no difference in downlink fallback DCI length, DCI format 0-0 only needs to be aligned with DCI format 1-0 as the baseline. If SIB1 compact DCI is introduced, the alignment of DCI format 0-0 needs to be considered.

[0614] Solution 1: Align DCI format 0-0 and TPC group DCI with non-compact DCI format 1-0 (requires certain protocol changes)

[0615] Solution 2: Align DCI format 0-0 and TPC group DCI with SIB1 compact DCI format 1-0

[0616] ○Optionally, for TC-RNTI DCI format 0-0, the following mechanism can be introduced:

[0617] For TC-RNTI DCI format 0-0, if its length exceeds that of compact DCI format 1-0, consider removing the NDI and / or UL / SUL indicator bits. If the length after removal still exceeds that of compact DCI format 1-0, further reduce the upper bits of the FDRA field to achieve size alignment between the two formats.

[0618] The removal priority of NDI and UL / SUL indictors is determined by the protocol or configured by the base station.

[0619] For the transmission of SIB1compact DCI format 1-0, in order to reduce the impact on legacy UEs, it is possible to consider using separate resources for transmission. The following design solutions can be considered:

[0620] - Separate CORESET.

[0621] - Frequency domain resources are implicitly determined by some rules, such as the offset from the legacy CORESET#0, which can also be selected as the initial DL BWP during the initial access process.

[0622] - Separate search spaces or separate PMOs.

[0623] The separate search space can be implicitly determined by some rules, i.e., it has some relationship with the old search space zero. For example, it can have some time offset (symbol level, slot level, half-frame or frame level) from the old search space zero, or it can have the same time position as search space zero within a certain time period, but the two SSs have different time periods, and / or the time period for additional PDCCH can be postponed to the time period / window of CSS#0. Alternatively, the separate CSS#0 index can be implicitly determined by the old CSS#0 index.

[0624] For example, for the following positions of multiplexing mode 1, SIB1 compact DCI is located in slots #5 to #9, and the symbol positions are as follows: Alternatively, a symbol offset is specified for a separate SIB1 compact DCI, ie, N_offset>=5.

[0625] - For SSB&CORESET#0 multiplexing pattern 1, when M=1 or 2 in the PMO determination table, the following scheme can also be considered: additional SIB1 PDCCH and legacy SIB1 PDCCH are transmitted on PMOs in two slots within the duration window respectively.

[0626] - As shown in the figure above, for SSB#0, the legacy PDCCH transmission position can be located in slot#10, and the additional SIB1 PDCCH transmission position can be located in slot#11, or vice versa

[0627] - PDCCH candidates are determined individually within the same PMO.

[0628] - For compact SIB1 PDCCH, an offset factor = 1 may be added to the formula next to nCI to determine the PDCCH candidates for a given set of ALs, or a value of Yp, n = 1 may be specified for SIB1 compact DCI in the following formula.

[0629] ○ In summary, the black-filled CCEs will be applicable to the individual compact DCI formats 1-0 in FIG3C .

[0630] ○ In addition, if the number of CCEs exceeds 32, you can also choose More Applicable.

[0631] - Different bands, different CORESET / search space configurations, or different multiplexing modes may use different schemes. For example, for multiplexing pattern #2 or multiplexing pattern #3, the scheme of separate PDCCH candidates (PDCCH candidates) in the same PMO is not used, or when the number of CCEs in CORESET #0 is less than 16, the scheme of PDCCH candidates (PDCCH candidates) in the same PMO is not used. Another possible approach is that the terminal does not expect the number of CCEs to be less than 32, and accordingly, the configuration table needs to be extended for certain SCS combinations.

[0632] In addition to the above approach, the following approach can also be used: the compact DCI format 1-0 uses legacy resources and legacy PDCCH candidates. In this case, for the transmission of SIB1 compact DCI format 1-0, in order to reduce the blind detection complexity of the terminal, the following solution can be considered: a separate DMRS for SIB1 compact DCI format 1-0.

[0633] - Separate time domain and / or frequency domain resources or different DMRS sequences.

[0634] This solution can be applied to paging / SIB1 / OSI / Msg1 / 2 / 3 / 4 MBS DCI, etc.

[0635] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0636] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0637] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0638] FIG8A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in FIG8A , the terminal 101 may include at least one of a transceiver module 11 and a processing module 12 .

[0639] In some embodiments, the above-mentioned processing module 12 is used to determine the size of the first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and the first DCI and the second DCI are both DCIs encrypted by SI-RNTI; the transceiver module 11 is used to receive the first DCI sent by the network device according to the size of the first DCI.

[0640] The transceiver module 11 is configured to execute at least one of the communication steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto) such as sending and / or receiving performed by the terminal 101 in any of the above methods, and will not be described in detail here. Optionally, the processing module 22 is configured to execute at least one of the other steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto) performed by the terminal 101 in any of the above methods, and will not be described in detail here.

[0641] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0642] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0643] FIG8B is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in FIG8B , the network device 102 may include at least one of a transceiver module 21 and a processing module 22 .

[0644] In some embodiments, the above-mentioned processing module 22 is used to determine the size of the first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs encrypted by SI-RNTI; the transceiver module 21 is used to send the first DCI to the terminal according to the size of the first DCI.

[0645] The transceiver module 21 is configured to execute at least one of the communication steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto) such as sending and / or receiving performed by the network device 102 in any of the above methods, which are not described in detail here. Optionally, the processing module 22 is configured to execute at least one of the other steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto) performed by the network device 102 in any of the above methods, which are not described in detail here.

[0646] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0647] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0648] Figure 9A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0649] As shown in Figure 9A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more processors 8101 are used to call instructions to enable the communication device 8100 to perform any of the above methods.

[0650] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs at least one of the communication steps such as sending and / or receiving in the above method (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto), and the processor 8101 performs at least one of the other steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0651] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memories 8103 may be located outside the communication device 8100. In alternative embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memory 8102 and may be configured to receive data from the memory 8102 or other devices, or to send data to the memory 8102 or other devices. For example, the interface circuits 8104 may read data stored in the memory 8102 and send the data to the processor 8101.

[0652] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 9A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0653] 9B is a schematic diagram of the structure of the chip 8200 proposed in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG9B , but the present disclosure is not limited thereto.

[0654] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0655] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Alternatively, all or part of memory 8203 may be located external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203 and may be used to receive data from memory 8203 or other devices, or may be used to send data to memory 8203 or other devices. For example, interface circuit 8202 may read data stored in memory 8203 and send the data to processor 8201.

[0656] In some embodiments, the interface circuit 8202 performs at least one of the communication steps such as sending and / or receiving in the above method (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto). The interface circuit 8202 performing the communication steps such as sending and / or receiving in the above method, for example, means that the interface circuit 8202 performs data exchange between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the other steps (e.g., S201-S203, S401A-S402A, S401B-S402B, but not limited thereto).

[0657] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0658] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0659] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0660] Those skilled 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, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0661] Those skilled in the art will 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.

[0662] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for transmitting downlink control information DCI, characterized in that: The method is executed by a terminal, and includes: Determine a size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by a system message radio network temporary identifier SI-RNTI; The first DCI sent by a network device is received according to the size of the first DCI.

2. The method according to claim 1, characterized in that The method further comprises: Determine that a size of a third DCI is the same as a size of the first DCI, and the third DCI is a DCI other than the first DCI in a DCI format of 1-0; or It is determined that the size of the fourth DCI is the same as the size of the first DCI, and the fourth DCI is a DCI other than the first DCI in a DCI format 1-0 transmitted in a common search space CSS.

3. The method according to claim 2, characterized in that The method further includes scrambling a cyclic redundancy check CRC of at least one of the third DCI and the fourth DCI by any one of the following radio network temporary identifiers RNTI: Temporary cell TC-RNTI; Cell C-RNTI; Random access RA-RNTI; Message MsgB-RNTI; Paging P-RNTI.

4. The method according to any one of claims 1 to 3, characterized in that The size of the first DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

5. The method according to claim 2 or 3, characterized in that: The size of the first DCI is M bits less than the size of the second DCI, and the size of the third DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

6. The method according to claim 2 or 3, characterized in that: The size of the first DCI is M bits less than the size of the second DCI, and the size of the fourth DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

7. The method according to any one of claims 4 to 6, characterized in that The M bits include at least one of the following: The high A bits of the modulation and coding scheme MCS; B reserved bits; C bits in the transport block size TBS scaling field; D bits in the virtual resource block to physical resource block mapping VRB to PRB mapping field; E bits in the downlink allocation index DAI field; F bits in the frequency domain resource allocation FDRA field; Among them, A, B, C, D, E, and F are all non-negative integers ≤M.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: Determine that the size of a fifth DCI with a DCI format of 0-0 is the same as the size of the first DCI, wherein the size of the fifth DCI is W bits less than the size of a sixth DCI with a DCI format of 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

9. The method according to claim 8, characterized in that The method further comprises: The size of the fifth DCI is relative to the size of the corresponding sixth DCI, and the first field is W bits less, or The size of the fifth DCI is relative to the size of the corresponding sixth DCI, with N fewer bits in the first field and K fewer bits in the second field.

10. The method according to claim 9, characterized in that The first field includes at least one of the following: New data indicates NDI; Uplink indication UL indictor; Uplink supplementary link indication SUL indictor.

11. The method according to claim 9 or 10, characterized in that The second field is a FDRA field.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: Sending first indication information to the network device, wherein the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

13. The method according to claim 12, characterized in that The sending the first indication information to the network device includes: Sending Msg1 to the network device, wherein the Msg1 carries the first indication information; or Sending Msg3 to the network device, wherein the Msg3 carries the first indication information; or Sending a MsgA physical random access channel PRACH to the network device, wherein the MsgA PRACH carries the first an instruction message; or Sending a MsgA physical uplink shared channel PUSCH to the network device, wherein the MsgA PUSCH carries the first indication information.

14. The method according to claim 13, characterized in that The method further comprises: Receive first configuration information sent by the network device, wherein the first configuration information is used to indicate a resource set used by the terminal to send at least one of the following messages: The Msg1; The MsgA PRACH; The MsgA PUSCH.

15. The method according to claim 13, characterized in that The Msg3 carries the first indication information, including: Use a reserved field in a Msg3 media access control layer MAC protocol data unit PDU to carry the first indication information; or multiplexing an existing MACCE to carry the first indication information; or Use reserved bits in the unlimited resource control RRC signaling carried by Msg3 or MsgA to carry the first indication information; or A new logical channel identifier LCID is used to carry the first indication information.

16. The method according to claim 14 or 15, characterized in that The method further comprises: Second configuration information sent by the network device is received, wherein the second configuration information is used to indicate a first threshold.

17. The method according to claim 16, characterized in that The sending the first indication information to the network device includes: Determine that the reference signal received power RSRP of the synchronization signal block SSB is lower than the first threshold, and send the first indication information to the network device.

18. The method according to any one of claims 12 to 17, characterized in that The relevant signaling includes at least one of the following: The RA-RNTI scrambled DCI format is the DCI in 1-0; The TC-RNTI scrambled DCI format is the DCI in 1-0; The TC-RNTI scrambled DCI format is DCI in 0-0; The DCI format of MsgB-RNTI scrambled is DCI in 1-0; The DCI format for C-RNTI scrambling is DCI in 0-0; The DCI format for C-RNTI scrambling is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

19. The method according to claim 16 or 17, characterized in that A plurality of the related signalings, different related signalings corresponding to different first thresholds; and / or Different first thresholds are associated with different PRACH resource sets.

20. The method according to any one of claims 1 to 19, characterized in that The method further comprises: Determine that the first DCI is not subject to a DCI size number limit, wherein the DCI size number limit is a total number of monitored different DCI sizes, and the total number does not exceed 4; or Determine that the first DCI is subject to a DCI size number limit, wherein the DCI size number limit is a total number of monitored different DCI sizes, and the total number does not exceed 5.

21. The method according to claim 1 or 20, characterized in that The method further comprises: Determine a size of at least one of a fifth DCI in DCI format 0-0 and a DCI in DCI format 2-X to be the same as the size of the second DCI; or Determine the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X to be the same as the size of the first DCI.

22. The method according to any one of claims 1 to 21, characterized in that The receiving the first DCI sent by the network device includes: The first DCI sent by the network device using specific resources is received, wherein the specific resources are different from resources of the second DCI.

23. The method of claim 22, wherein: The specific resource includes at least one of the following: A separate frequency domain resource different from the resource provided for the second DCI; A separate time domain resource different from the resource provided for the second DCI; a separate demodulation reference signal DMRS sequence different from the resource provided to the second DCI; a separate search space different from the resources provided to the second DCI; A separate monitoring moment PMO different from the resources provided for the second DCI; A separate physical downlink control channel PDCCH candidate channel that is different from the resource provided for the second DCI in the same PMO.

24. A method for transmitting downlink control information, characterized in that: The method is performed by a network device and includes: Determine a size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI; The first DCI is sent to the terminal according to the size of the first DCI.

25. The method of claim 24, wherein: The method further comprises: Determine that a size of a third DCI is the same as a size of the first DCI, and the third DCI is a DCI other than the first DCI in a DCI format of 1-0; or It is determined that the size of the fourth DCI is the same as the size of the first DCI, and the fourth DCI is a DCI in a DCI format 1-0 transmitted in the CSS except the first DCI.

26. The method of claim 25, wherein: The method further includes scrambling a CRC of at least one of the third DCI and the fourth DCI by any one of the following RNTIs: TC-RNTI; C-RNTI; RA-RNTI; MsgB-RNTI; P-RNTI.

27. The method according to any one of claims 24 to 16, characterized in that The size of the first DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

28. The method according to claim 25 or 26, characterized in that The size of the first DCI is M bits less than the size of the second DCI, and the size of the third DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

29. The method according to claim 25 or 26, characterized in that The size of the first DCI is M bits less than the size of the second DCI, and the size of the fourth DCI is M bits less than the size of the second DCI, where M is an integer greater than 0.

30. The method according to any one of claims 27 to 29, characterized in that The M bits include at least one of the following: The high A bits of MCS; B reserved bits; C bits in the TBS scaling field; D bits in the VRB to PRB mapping field; E bits in the DAI field; F bits in the FDRA field; Among them, A, B, C, D, E, and F are all non-negative integers ≤M.

31. The method according to any one of claims 24 to 30, characterized in that The method further comprises: Determine that the size of the fifth DCI in DCI format 0-0 is the same as the size of the first DCI, wherein the size of the fifth DCI is W bits less than the size of the sixth DCI in DCI format 0-0, and the fifth DCI and the sixth DCI are scrambled by TC-RNTI.

32. The method of claim 31, wherein: The method further comprises: The size of the fifth DCI is relative to the size of the corresponding sixth DCI, and the first field is W bits less, or The size of the fifth DCI is relative to the size of the corresponding sixth DCI, with N fewer bits in the first field and K fewer bits in the second field.

33. The method of claim 32, wherein: The first field includes at least one of the following: NDI; UL indictor; SUL indictor.

34. The method according to claim 32 or 33, characterized in that The second field is a FDRA field.

35. The method according to any one of claims 24 to 34, characterized in that The method further comprises: Receive first indication information sent by the terminal, wherein the first indication information is used to indicate that the terminal supports receiving related signaling based on the size of the first DCI.

36. The method of claim 35, wherein: The receiving first indication information sent by the terminal includes: receiving a Msg1 sent by the terminal, wherein the Msg1 carries the first indication information; or receiving Msg3 sent by the terminal, wherein the Msg3 carries the first indication information; or receiving a MsgA PRACH sent by the terminal, wherein the MsgA PRACH carries the first indication information; or A MsgA PUSCH sent by the terminal is received, wherein the MsgA PUSCH carries the first indication information.

37. The method of claim 36, wherein: The method further comprises: Sending first configuration information to the terminal, where the first configuration information is used to indicate a resource set used by the terminal to send at least one of the following messages: The Msg1; The MsgA PRACH; The MsgA PUSCH.

38. The method of claim 36, wherein: The Msg3 carries the first indication information, including: Use the reserved field in the Msg3 MAC PDU to carry the first indication information; or Reusing an existing MAC CE to carry the first indication information; or Use reserved bits in the RRC signaling carried by Msg3 or MsgA to carry the first indication information; or The new LCID is used to carry the first indication information.

39. The method according to claim 37 or 38, characterized in that The method further comprises: Sending second configuration information to the terminal, wherein the second configuration information is used to indicate a first threshold.

40. The method of claim 39, wherein: The receiving first indication information sent by the terminal includes: Receive first indication information sent by the terminal to the network device when determining that the RSRP of the SSB is lower than the first threshold.

41. The method according to any one of claims 35 to 40, characterized in that The relevant signaling includes at least one of the following: The RA-RNTI scrambled DCI format is the DCI in 1-0; The TC-RNTI scrambled DCI format is the DCI in 1-0; The TC-RNTI scrambled DCI format is DCI in 0-0; The DCI format of MsgB-RNTI scrambled is DCI in 1-0; The DCI format for C-RNTI scrambling is DCI in 0-0; The DCI format for C-RNTI scrambling is DCI in 1-0; Msg2 PDSCH; MsgB PDSCH; Msg4 PDSCH.

42. The method according to claim 39 or 40, characterized in that A plurality of the related signalings, different related signalings corresponding to different first thresholds; and / or Different first thresholds are associated with different PRACH resource sets.

43. The method according to any one of claims 24 to 42, characterized in that The method further comprises: Determine that the first DCI is not subject to a DCI size number limit, wherein the DCI size number limit is a total number of monitored different DCI sizes, and the total number does not exceed 4; or Determine that the first DCI is subject to a DCI size number limit, wherein the DCI size number limit is a total number of monitored different DCI sizes, and the total number does not exceed 5.

44. The method of claim 24 or 43, wherein: The method further comprises: Determine a size of at least one of a fifth DCI in DCI format 0-0 and a DCI in DCI format 2-X to be the same as the size of the second DCI; or Determine the size of at least one of the fifth DCI in DCI format 0-0 and the DCI in DCI format 2-X to be the same as the size of the first DCI.

45. The method according to any one of claims 24 to 44, characterized in that The sending the first DCI to the terminal includes: The first DCI is sent to the terminal using specific resources, wherein the specific resources are different from resources of the second DCI.

46. ​​The method of claim 45, wherein: The specific resource includes at least one of the following: A separate frequency domain resource different from the resource provided for the second DCI; A separate time domain resource different from the resource provided for the second DCI; a separate DMRS sequence different from the resources provided for the second DCI; a separate search space different from the resources provided to the second DCI; a separate PMO different from the resources provided to the second DCI; A separate PDCCH candidate channel different from the resources provided for the second DCI within the same PMO.

47. A DCI transmission method, characterized in that: include: The network device determines a size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI; The network device sends the first DCI to the terminal according to the size of the first DCI; The terminal determines a size of a first DCI; The terminal receives the first DCI sent by the network device according to the size of the first DCI.

48. A terminal, characterized in that: include: A processing module, configured to determine a size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI; The transceiver module is used to receive the first DCI sent by the network device according to the size of the first DCI.

49. A network device, characterized in that: include: A processing module, configured to determine a size of a first DCI, wherein the size of the first DCI is smaller than the size of the second DCI, and both the first DCI and the second DCI are DCIs scrambled by SI-RNTI; The transceiver module is used to send the first DCI to the terminal according to the size of the first DCI.

50. A terminal, characterized in that: include: one or more processors; A memory coupled to the processor, wherein instructions are stored in the memory, and when the instructions are executed by the processor, the terminal executes the method according to any one of claims 1 to 23.

51. A network device, characterized in that: include: one or more processors; A memory coupled to the processor, wherein instructions are stored in the memory, and when the instructions are executed by the processor, the network device executes the method according to any one of claims 24 to 46.

52. A communication system, characterized in that: It comprises a terminal and a network device, wherein the terminal is configured to implement the method according to any one of claims 1 to 23, and the network device is configured to implement the method according to any one of claims 24 to 46.

53. A storage medium storing instructions, characterized in that: When the instructions are executed on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 23 and 24 to 46.

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