A communication method, apparatus and system

Abstract

This application provides a communication method, apparatus, and system. The method includes: after a network device determines a first downlink control information (DCI), it sends the first DCI to a terminal device. Then, the terminal device receives the first DCI from the network device and, based on the first DCI, receives downlink data from the network device or sends uplink data to the network device. The first DCI is used for uplink or downlink data scheduling, has a fixed number of bits, includes a first identifier indicating the format of the first DCI, and the format of the first DCI includes either a first DCI format or a second DCI format. In other words, this application can design a DCI size for multiple DCI formats, thus not only reducing the complexity of DCI detection by the terminal device and saving power consumption, but also ensuring the diversity of data transmission and increasing scheduling flexibility.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, apparatus and system. Background Technology

[0002] Fifth-generation (5G) mobile communication technology is a global 5G standard based on a new air interface design using orthogonal frequency division multiplexing (OFDM), and it is also a very important foundation for the next generation of cellular mobile technology. 5G mobile communication technology offers diverse services, including enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC). Generally speaking, mMTC terminal devices (also known as machine-type terminal devices) have higher power consumption requirements than eMBB terminal devices. Based on this, in 3GPP's new radio (NR) release 17, NR reduced capability (NR REDCAP) terminal devices, as a type of mMTC terminal device, are receiving increasing attention.

[0003] How to reduce the power consumption of NR REDCAP terminal devices? Considering that the terminal devices inevitably consume power when detecting downlink control information (DCI) sent by network devices, power consumption of NR REDCAP terminal devices can be reduced by decreasing the power consumption of DCI detection. However, there is currently no solution for reducing the power consumption of terminal devices detecting DCI. Summary of the Invention

[0004] This application provides a communication method, apparatus, and system for reducing the power consumption of terminal devices in detecting DCI.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] Firstly, a communication method is provided, applicable to a communication device, such as a terminal device. The method includes: receiving first downlink control information (DCI) from a network device, the first DCI being used for uplink or downlink data scheduling, wherein the number of bits in the first DCI is fixed, the first DCI includes a first identifier indicating the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format; and receiving downlink data from the network device or sending uplink data to the network device based on the first DCI. Based on this scheme, since the number of bits in the first DCI is fixed and the first DCI has multiple DCI formats, that is, a DCI size (also referred to as the number of DCI bits) can be designed for multiple DCI formats. Therefore, not only can the complexity of DCI detection by the terminal device be reduced, thereby saving power consumption of the terminal device, but also the diversity of data transmission can be guaranteed, increasing the flexibility of scheduling.

[0007] Secondly, a communication method is provided, applicable to a communication device, such as a network device. The method includes: determining a first downlink control information (DCI), the first DCI being used for uplink or downlink data scheduling, wherein the number of bits in the first DCI is fixed, the first DCI includes a first identifier indicating the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format; and sending the first DCI to a terminal device. Based on this scheme, since the number of bits in the first DCI is fixed and the first DCI has multiple DCI formats, that is, a DCI size (also referred to as the number of DCI bits) can be designed for multiple DCI formats. Therefore, not only can the complexity of DCI detection by the terminal device be reduced, thereby saving power consumption of the terminal device, but also the diversity of data transmission can be guaranteed, increasing the flexibility of scheduling.

[0008] In conjunction with the first or second aspect, in one possible implementation, the number of information bits in at least one information field of the first DCI having the second DCI format is configurable, for example, by RRC signaling, thereby increasing scheduling flexibility.

[0009] In conjunction with the first or second aspect, in one possible implementation, the number of bits in each information field of the first DCI having the first DCI format is fixed.

[0010] In conjunction with the first or second aspect, in one possible implementation, the number of bits in the first DCI is fixed, including: the number of bits in each information field included in the first DCI is fixed; or, the first DCI includes information fields associated with Radio Resource Control (RRC) signaling configuration, but the number of bits corresponding to the first DCI is fixed; or, the number of bits corresponding to the first DCI is related to the initial access parameters. In other words, all of the above methods can be considered as having a fixed number of bits in the first DCI.

[0011] In one possible implementation, combining the first or second aspect, the number of bits in the first DCI is the same as the number of bits in the second DCI, wherein the second DCI is used to schedule the transmission of common information. That is, considering that before establishing a data transmission link with the network device, the terminal device will detect the common information transmitted by the network device (e.g., system information broadcast by the network device) to obtain the basic configuration information of the network device. Furthermore, the common information transmitted by the network device can also be implemented through DCI scheduling; that is, the network device can use DCI to indicate control information for scheduling the transmission of common information. The terminal device, by detecting the DCI, can determine the control information for scheduling the transmission of common information and receive the common information transmitted by the network device according to the control information. Therefore, in this embodiment, the number of bits in the first DCI can be designed to be the same as the number of bits in the second DCI for scheduling the transmission of common information, thereby further reducing the number of DCIs with different DCI sizes detected by the terminal device, and thus saving power consumption of the terminal device.

[0012] In one possible implementation, combining the first or second aspect, the terminal device corresponding to the public information is a first type of terminal device; or, the terminal device corresponding to the public information includes both the first type of terminal device and a second type of terminal device, wherein the capabilities of the first type of terminal device and the second type of terminal device differ. For example, the capability of the first type of terminal device is less than that of the second type of terminal device. Based on this scheme, when the terminal device corresponding to the public information can include both the first type of terminal device and the second type of terminal device, it also means that the first type of terminal device and the second type of terminal device can receive the same public information, and thus the second DCI received by the first type of terminal device and the second type of terminal device for scheduling the transmission of public information is the same. From the network device side, adopting such a design allows the same DCI to be sent to different types of terminal devices to indicate the transmission of public information, which can reduce the overhead of the network device sending public information (the overhead of public information includes the resource overhead corresponding to the DCI for scheduling the transmission of public information, or the overhead of public information includes both the DCI for scheduling the transmission of public information and the resource overhead corresponding to the transmission of public information), thereby saving power consumption on the network device side.

[0013] In conjunction with the first or second aspect, in one possible implementation, when the public information is system information, the second DCI includes control information for scheduling system information block type 1 or other system information, wherein the second DCI is scrambled using the System Information Radio Network Temporary Identifier (SI-RNTI); or, when the public information is a paging message, the second DCI is scrambled using the Paging Radio Network Temporary Identifier (P-RNTI); or, when the public information is a Random Access Response (RAR) message, the second DCI is scrambled using the Random Access Radio Network Temporary Identifier (RA-RNTI). That is, in this embodiment, different RNTIs can be used to distinguish different public information.

[0014] In conjunction with the first or second aspect, in one possible implementation, the number of bits in the first DCI is the same as the number of bits in the second DCI, including: the sum of the number of bits in all information fields included in the first DCI is the same as the sum of the number of bits in all information fields included in the second DCI; or, the original number of bits in the first DCI is the same as the original number of bits in the second DCI, wherein the original number of bits is the number of bits in the DCI transmission before the cyclic redundancy check (CRC) operation is performed; or, the number of bits in the first DCI before the channel coding operation is the same as the number of bits in the second DCI before the channel coding operation is performed; or, the number of modulation symbols transmitted corresponding to the first DCI is the same as the number of modulation symbols transmitted corresponding to the second DCI; or, the number of bits corresponding to the modulation symbols transmitted corresponding to the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols transmitted corresponding to the second DCI after demodulation. In other words, all of the above methods can be considered as the number of bits in the first DCI being the same as the number of bits in the second DCI.

[0015] In conjunction with the first or second aspect, in one possible implementation, the first DCI having the first DCI format includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating hybrid automatic repeater (HARQ) process number.

[0016] In conjunction with the first or second aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the first DCI having the first DCI format further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between downlink data transmission scheduled by the first DCI and HARQ feedback.

[0017] In conjunction with the first or second aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the first DCI having the first DCI format further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the Physical Uplink Shared Channel (PUSCH).

[0018] In conjunction with the first or second aspect, in one possible implementation, the first DCI having the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function. The first data transmission function indicates basic functions for data transmission scheduling, and the second data transmission function indicates additional functions for data transmission scheduling. The second data transmission function allows for a more flexible design of the first DCI having the second DCI format, thereby increasing scheduling flexibility.

[0019] In conjunction with the first or second aspect, in one possible implementation, the information field for the first data transmission function includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating HARQ process number.

[0020] In conjunction with the first or second aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the information field for the first data transmission function further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between the downlink data transmission scheduled by the first DCI and the HARQ feedback.

[0021] In conjunction with the first or second aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the information field for the first data transmission function further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the PUSCH.

[0022] In conjunction with the first or second aspect, in one possible implementation, the information field for the second data transmission function includes one or more of the following information fields: a tenth information field, which indicates control information related to multi-antenna data transmission; an eleventh information field, which indicates control information related to code block group (CBG); a twelfth information field, which indicates beam-related control information; a thirteenth information field, which indicates carrier-related control information; or, a fourteenth information field, which indicates control information for bandwidth portion (BWP) switching.

[0023] In conjunction with the first or second aspect, in one possible implementation, whether the information field of the second data transmission function is effective is indicated by a bitmap or binary representation of the control field in the first DCI with the second DCI format. The parameter information corresponding to the effective information field is configured by RRC signaling. In this embodiment, for a first DCI with the second DCI format, when the specific configuration parameters of the information field are implemented through RRC configuration, the RRC configuration signaling can be carried by the PDSCH scheduled by the first DCI with the first DCI format. Since the number of bits in the information field corresponding to the first DCI with the first DCI format is fixed, the terminal device can determine the scheduling information indicated by the first DCI by detecting the first DCI format, and then receive the PDSCH to obtain the RRC configuration signaling. Furthermore, there is no issue of ambiguous RRC signaling configuration when the terminal device detects the first DCI with the first DCI format.

[0024] In conjunction with the first or second aspect, in one possible implementation, only a DCI format with the first DCI bit size is configured within the user search space (USS) corresponding to the terminal device. Since only a DCI format with the first DCI bit size is configured in the USS, the terminal device only needs to detect one DCI size format within the USS. Compared to existing technologies where the terminal device can detect at most two DCI sizes within the USS, this solution reduces the complexity of DCI detection for the terminal device, thereby saving power consumption.

[0025] In conjunction with the first or second aspect, in one possible implementation, only the DCI format with the first DCI bit size is configured in the USS and public search space (CSS) corresponding to the terminal device. For the terminal device, when only the DCI format with the first DCI bit size is configured in all configured USS and all CSS, the terminal device only needs to detect a maximum of one DCI format size. Compared to the prior art where the terminal device detects a maximum of four DCI formats in the CSS and USS, this solution reduces the complexity of DCI detection for the terminal device, thereby saving power consumption.

[0026] Thirdly, a communication device is provided, comprising modules, units, or means for performing the methods described in the first aspect or any possible implementation thereof. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above. For example, the communication device may be a terminal device or a chip or other component disposed in a terminal device. The communication device may, for example, include a transceiver module.

[0027] When the communication device is used to perform the method described in the first aspect or any possible implementation of the first aspect, the transceiver module is configured to receive a first downlink control information (DCI) from a network device, the first DCI being used for uplink or downlink data scheduling, wherein the number of bits in the first DCI is fixed, the first DCI includes a first identifier, the first identifier being used to indicate the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format; the transceiver module is further configured to receive downlink data from the network device or send uplink data to the network device according to the first DCI.

[0028] Fourthly, a communication device is provided, comprising modules, units, or means for performing the methods described in the first aspect or any possible implementation thereof. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above. Exemplarily, the communication device may be a terminal device or a chip or other component disposed in a terminal device. The communication device may, for example, include a transceiver.

[0029] When the communication device is used to perform the method described in the first aspect or any possible implementation of the first aspect, the transceiver is configured to receive a first downlink control information (DCI) from a network device, the first DCI being used for uplink or downlink data scheduling, wherein the number of bits in the first DCI is fixed, the first DCI includes a first identifier, the first identifier being used to indicate the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format; the transceiver is further configured to receive downlink data from the network device or send uplink data to the network device according to the first DCI.

[0030] In conjunction with the third or fourth aspect, in one possible implementation, the number of information bits in at least one information field of the first DCI having the second DCI format is configurable.

[0031] In conjunction with the third or fourth aspect, in one possible implementation, the number of bits in each information field of the first DCI having the first DCI format is fixed.

[0032] In conjunction with the third or fourth aspect, in one possible implementation, the number of bits of the first DCI is fixed, including: the number of bits of each information field included in the first DCI is fixed; or, the first DCI includes information fields associated with Radio Resource Control (RRC) signaling configuration, but the number of bits corresponding to the first DCI is fixed; or, the number of bits corresponding to the first DCI is related to the initial access parameters.

[0033] In conjunction with the third or fourth aspect, in one possible implementation, the number of bits of the first DCI is the same as the number of bits of the second DCI, wherein the second DCI is used to schedule the transmission of common information.

[0034] In conjunction with the third or fourth aspect, in one possible implementation, the communication device corresponding to the public information is a first type of communication device; or, the communication device corresponding to the public information includes both the first type of communication device and a second type of communication device, wherein the capabilities of the first type of communication device and the second type of communication device differ. For example, the capability of the first type of communication device is less than that of the second type of communication device.

[0035] In conjunction with the third or fourth aspect, in one possible implementation, when the public information is system information, the second DCI includes control information for scheduling system information block type 1 or other system information, wherein the second DCI is scrambled using the system information radio network temporary identifier SI-RNTI; or, when the public information is a paging message, the second DCI is scrambled using the paging radio network temporary identifier P-RNTI; or, when the public information is a random access response (RAR) message, the second DCI is scrambled using the random access radio network temporary identifier RA-RNTI.

[0036] In conjunction with the third or fourth aspect, in one possible implementation, the number of bits in the first DCI is the same as the number of bits in the second DCI, including: the sum of the number of bits in all information fields included in the first DCI is the same as the sum of the number of bits in all information fields included in the second DCI; or, the number of original information bits in the first DCI is the same as the number of original information bits in the second DCI, wherein the number of original information bits is the number of bits in the DCI transmission before the cyclic redundancy check (CRC) operation is performed; or, the number of bits in the first DCI before the channel coding operation is the same as the number of bits in the second DCI before the channel coding operation is performed; or, the number of modulation symbols transmitted corresponding to the first DCI is the same as the number of modulation symbols transmitted corresponding to the second DCI; or, the number of bits corresponding to the modulation symbols transmitted corresponding to the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols transmitted corresponding to the second DCI after demodulation.

[0037] In conjunction with the third or fourth aspect, in one possible implementation, the first DCI having the first DCI format includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating hybrid automatic repeater (HARQ) process number.

[0038] In conjunction with the third or fourth aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the first DCI having the first DCI format further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between downlink data transmission scheduled by the first DCI and HARQ feedback.

[0039] In conjunction with the third or fourth aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the first DCI having the first DCI format further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink shared channel (PUSCH).

[0040] In conjunction with the third or fourth aspect, in one possible implementation, the first DCI having the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

[0041] In conjunction with the third or fourth aspect, in one possible implementation, the information field for the first data transmission function includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating HARQ process number.

[0042] In conjunction with the third or fourth aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the information field for the first data transmission function further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between the downlink data transmission scheduled by the first DCI and the HARQ feedback.

[0043] In conjunction with the third or fourth aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the information field for the first data transmission function further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the PUSCH.

[0044] In conjunction with the third or fourth aspect, in one possible implementation, the information field for the second data transmission function includes one or more of the following information fields: a tenth information field, which indicates control information related to multi-antenna data transmission; an eleventh information field, which indicates control information related to code block group (CBG); a twelfth information field, which indicates beam-related control information; a thirteenth information field, which indicates carrier-related control information; or, a fourteenth information field, which indicates control information for bandwidth portion (BWP) switching.

[0045] In conjunction with the third or fourth aspect, in one possible implementation, whether the information field of the second data transmission function is effective is indicated by a bitmap or binary representation of the control field in the first DCI having the second DCI format, wherein the parameter information corresponding to the effective information field is configured by RRC signaling.

[0046] In conjunction with the third or fourth aspect, in one possible implementation, only a DCI format with the first DCI bit size is configured within the user search space (USS) corresponding to the communication device.

[0047] In conjunction with the third or fourth aspect, in one possible implementation, only the DCI format with the first DCI bit size is configured within the USS and the public search space CSS corresponding to the communication device.

[0048] The technical effects of the third or fourth aspect mentioned above can be referred to the technical effects of the first aspect mentioned above, and will not be repeated here.

[0049] Fifthly, a communication device is provided, comprising modules, units, or means for performing the methods described in the second aspect or any possible implementation thereof. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above. For example, the communication device may be a network device or a chip or other component disposed within a network device. The communication device may, for example, include a transceiver module and a processing module.

[0050] When the communication device is used to perform the method described in the second aspect or any possible implementation of the second aspect, the processing module is used to determine a first downlink control information (DCI), the first DCI being used for uplink or downlink data scheduling, wherein the number of bits of the first DCI is fixed, the first DCI includes a first identifier, the first identifier being used to indicate the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format; the transceiver module is used to send the first DCI to the terminal device.

[0051] In a sixth aspect, a communication device is provided, comprising modules, units, or means for performing the methods described in the second aspect or any possible implementation thereof. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above. For example, the communication device may be a network device or a chip or other component disposed within a network device. The communication device may, for example, include a transceiver and a processor.

[0052] When the communication device is used to perform the method described in the second aspect or any possible implementation of the second aspect, the processor is used to determine a first downlink control information (DCI) for uplink or downlink data scheduling, wherein the number of bits of the first DCI is fixed, the first DCI includes a first identifier for indicating the format of the first DCI, and the format of the first DCI includes a first DCI format or a second DCI format; and the transceiver is used to send the first DCI to the terminal device.

[0053] In conjunction with the fifth or sixth aspect, in one possible implementation, the number of information bits in at least one information field of the first DCI having the second DCI format is configurable.

[0054] In conjunction with the fifth or sixth aspect, in one possible implementation, the number of bits in each information field of the first DCI having the first DCI format is fixed.

[0055] In conjunction with the fifth or sixth aspect, in one possible implementation, the number of bits of the first DCI is fixed, including: the number of bits of each information field included in the first DCI is fixed; or, the first DCI includes information fields associated with Radio Resource Control (RRC) signaling configuration, but the number of bits corresponding to the first DCI is fixed; or, the number of bits corresponding to the first DCI is related to the initial access parameters.

[0056] In conjunction with the fifth or sixth aspect, in one possible implementation, the number of bits of the first DCI is the same as the number of bits of the second DCI, wherein the second DCI is used to schedule the transmission of common information.

[0057] In conjunction with the fifth or sixth aspect, in one possible implementation, the terminal device corresponding to the public information is a first type of terminal device; or, the terminal device corresponding to the public information includes both the first type of terminal device and a second type of terminal device, wherein the capabilities of the first type of terminal device and the second type of terminal device differ. For example, the capabilities of the first type of terminal device are less than those of the second type of terminal device.

[0058] In conjunction with the fifth or sixth aspect, in one possible implementation, when the public information is system information, the second DCI includes control information for scheduling system information block type 1 or other system information, wherein the second DCI is scrambled using the system information radio network temporary identifier SI-RNTI; or, when the public information is a paging message, the second DCI is scrambled using the paging radio network temporary identifier P-RNTI; or, when the public information is a random access response (RAR) message, the second DCI is scrambled using the random access radio network temporary identifier RA-RNTI.

[0059] In conjunction with the fifth or sixth aspect, in one possible implementation, the number of bits of the first DCI is the same as the number of bits of the second DCI, including: the sum of the number of bits of all information fields included in the first DCI is the same as the sum of the number of bits of all information fields included in the second DCI; or, the number of original information bits of the first DCI is the same as the number of original information bits of the second DCI, wherein the number of original information bits is the number of bits of the DCI transmission before the cyclic redundancy check (CRC) operation is performed; or, the number of bits of the first DCI before the channel coding operation is the same as the number of bits of the second DCI before the channel coding operation is performed; or, the number of modulation symbols transmitted corresponding to the first DCI is the same as the number of modulation symbols transmitted corresponding to the second DCI; or, the number of bits corresponding to the modulation symbols transmitted corresponding to the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols transmitted corresponding to the second DCI after demodulation.

[0060] In conjunction with the fifth or sixth aspect, in one possible implementation, the first DCI having the first DCI format includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating hybrid automatic repeat (HARQ) process number.

[0061] In conjunction with the fifth or sixth aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the first DCI having the first DCI format further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between downlink data transmission scheduled by the first DCI and HARQ feedback.

[0062] In conjunction with the fifth or sixth aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the first DCI having the first DCI format further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the Physical Uplink Shared Channel (PUSCH).

[0063] In conjunction with the fifth or sixth aspect, in one possible implementation, the first DCI having the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

[0064] In conjunction with the fifth or sixth aspect, in one possible implementation, the information field for the first data transmission function includes one or more of the following information fields: a first information field indicating frequency domain resource allocation information; a second information field indicating time domain resource allocation information; a third information field indicating modulation and coding scheme (MCS); a fourth information field indicating redundancy version (RV) indication; or a fifth information field indicating HARQ process number.

[0065] In conjunction with the fifth or sixth aspect, in one possible implementation, when the first DCI is used for downlink data scheduling, the information field for the first data transmission function further includes one or more of the following information fields: a sixth information field, which is used to indicate the transmission power control (TPC) information for scheduling the physical uplink control channel (PUCCH); a seventh information field, which is used to indicate PUCCH resources; or an eighth information field, which is used to indicate the timing relationship between the downlink data transmission scheduled by the first DCI and the HARQ feedback.

[0066] In conjunction with the fifth or sixth aspect, in one possible implementation, when the first DCI is used for uplink data scheduling, the information field for the first data transmission function further includes: a ninth information field, which is used to indicate the transmission power control (TPC) information for scheduling the PUSCH.

[0067] In conjunction with the fifth or sixth aspect, in one possible implementation, the information field for the second data transmission function includes one or more of the following information fields: a tenth information field, which indicates control information related to multi-antenna data transmission; an eleventh information field, which indicates control information related to code block group (CBG); a twelfth information field, which indicates beam-related control information; a thirteenth information field, which indicates carrier-related control information; or, a fourteenth information field, which indicates control information for bandwidth portion (BWP) switching.

[0068] In conjunction with the fifth or sixth aspect, in one possible implementation, whether the information field of the second data transmission function is effective is indicated by a control field in the first DCI having the second DCI format in a bitmap or binary manner, wherein the parameter information corresponding to the effective information field is configured by RRC signaling.

[0069] In conjunction with the fifth or sixth aspect, in one possible implementation, only a DCI format with the first DCI bit size is configured within the user search space (USS) corresponding to the terminal device.

[0070] In conjunction with the fifth or sixth aspect, in one possible implementation, only the DCI format with the first DCI bit size is configured within the USS and public search space CSS corresponding to the terminal device.

[0071] The technical effects of the fifth or sixth aspect mentioned above can be referred to the technical effects of the second aspect mentioned above, and will not be repeated here.

[0072] A seventh aspect provides a communication device, which can be a terminal device as described in the first aspect or any possible implementation thereof, or a module applied in a terminal device, such as a chip or a chip system; or, the communication device can be a network device as described in the second aspect or any possible implementation thereof, or a module applied in a network device, such as a chip or a chip system. The communication device includes a processor for executing the methods of the corresponding aspect or any possible implementation thereof.

[0073] For example, the communication device further includes a memory coupled to the processor for performing the methods in the corresponding aspects or any possible implementations thereof.

[0074] In one possible implementation, the memory is used to store program instructions and data. The memory is coupled to the processor, which can call and execute the program instructions stored in the memory to perform the methods described in the corresponding aspects or any possible implementations of the corresponding aspects.

[0075] For example, the communication device further includes a communication interface for communicating with other devices. This communication interface can be a transceiver, an input / output interface, or a circuit, etc.

[0076] In one possible design, the communication device includes: a processor and a communication interface for performing the methods described in the corresponding aspects or any possible implementations thereof, specifically including: the processor communicating with an external entity using the communication interface; the processor running a computer program that causes the communication device to perform the methods described in the corresponding aspects or any possible implementations thereof. It is understood that the external entity may be an object other than the processor or an object other than the communication device.

[0077] In another possible design, the communication device is a chip or chip system. The communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system. The processor can also be manifested as processing circuitry or logic circuitry.

[0078] Eighthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a communication device, causes the communication device to perform the method of the first aspect or any possible implementation thereof, or to perform the method of the second aspect or any possible implementation thereof.

[0079] Ninth aspect, a computer program product comprising instructions, which, when executed by a computer, cause a communication device to perform the method of the first aspect or any possible implementation thereof, or to perform the method of the second aspect or any possible implementation thereof.

[0080] In a tenth aspect, a chip is provided, including a processor and an interface, the processor being coupled to a memory via the interface, wherein when the processor executes a computer program or instructions in the memory, the method in the first aspect or any possible implementation thereof, or the method in the second aspect or any possible implementation thereof, is executed.

[0081] The technical effects of any of the design methods in aspects seven through ten can be found in the technical effects of different design methods in aspects one or two above, and will not be repeated here.

[0082] Eleventhly, a communication system is provided, comprising a terminal device and a network device; wherein the network device is configured to send a first downlink control information (DCI) to the terminal device after determining the first DCI; the terminal device is configured to receive the first DCI from the network device and, based on the first DCI, receive downlink data from the network device or send uplink data to the network device. The first DCI is used for uplink or downlink data scheduling, the number of bits in the first DCI is fixed, the first DCI includes a first identifier, the first identifier is used to indicate the format of the first DCI, and the format of the first DCI includes a first DCI format or a second DCI format. The technical effects of the eleventh aspect can be referred to the technical effects of the first or second aspects described above, and will not be repeated here. Attached Figure Description

[0083] Figure 1 This application provides a schematic diagram of the architecture of a communication system.

[0084] Figure 2 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0085] Figure 3 This is another structural schematic diagram of the terminal device provided in the embodiments of this application;

[0086] Figure 4 A flowchart illustrating the communication method provided in an embodiment of this application;

[0087] Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0088] Figure 6This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0089] To facilitate understanding of the technical solutions of the embodiments of this application, a brief introduction to the relevant technologies of this application is given below.

[0090] Currently, terminal devices typically determine the necessary information for data transmission with network devices by receiving DCI (Distributed Control Information) sent by the network device. For example, a terminal device can determine the public information sent by the network device by receiving public control information. Alternatively, a terminal device can complete data transmission with the network device by receiving terminal-specific control information sent by the network device. This data transmission includes uplink and / or downlink data transmission. Typically, the public control information sent by the network device is scrambled with a public radio network temporary identity (RNTI). This public control information can be cell-specific or user group-specific; the difference is that the former is valid for all terminal devices within the cell, while the latter is only valid for a specific group of terminal devices. Terminal-specific control information sent by the network device is scrambled with the terminal-specific RNTI.

[0091] When a terminal device detects DCIs sent by a network device, it inevitably consumes some power. Generally, the terminal device checks for the presence of the DCI it needs to receive on some alternative resources. The DCIs the terminal device needs to receive include, but are not limited to, cell-specific common control information (CBI), user group-specific common control information (FBI), and control information specific to the terminal device sent by the network device. For ease of description, alternative resources can be represented by physical downlink control channel candidates (PDCCH candidates), because DCIs are generally carried through PDCCHs, and therefore, alternative resources for sending DCIs can be represented by PDCCH candidates. Furthermore, a terminal device may detect multiple DCIs on a single alternative resource. These multiple DCIs can be classified according to their DCI size. For DCIs with the same size, since they can be distinguished by different RNTIs, it can be assumed that the terminal device only needs to detect that DCI size once on that alternative resource to determine the control information sent by the network device. On the other hand, for DCIs with different sizes, the number of DCIs the terminal device needs to detect on that alternative resource is the same as the number of DCIs with different sizes. It should be noted that the DCI size here includes the raw information elements sent by the network device, or includes the raw information elements and cyclic redundancy check (CRC) bits.

[0092] Based on the above description, it can be concluded that the power consumption consumed by the terminal device in detecting DCI is related to the number of alternative resources for transmitting DCI and the number of DCI sizes. Generally speaking, the more alternative resources for transmitting DCI, the more different DCI sizes need to be detected, and the greater the power consumption consumed by the terminal device in detecting DCI.

[0093] In the prior art, assuming the terminal device detects DCI (which can also be considered as detecting PDCCH) in cell A, the maximum number of different DCI sizes that the terminal device can be configured to detect is 4. Specifically, in one downlink bandwidth part (BWP) of cell A, the maximum number of blind detections of DCIs based on different subcarrier spacings (SCS) is shown in Table 1:

[0094] Table 1

[0095] SCS Maximum number of blind checks 15KHz 44 30kHz 36 60kHz 22 120kHz 20

[0096] This shows that in existing technologies, the number of different DCI sizes is relatively large, resulting in a large number of blind detection operations. Directly applying existing technologies to the DCI detection process of NR REDCAP terminal devices is not conducive to power saving in NR REDCAP terminal devices.

[0097] To reduce the power consumption of terminal devices detecting DCI, the technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings.

[0098] The embodiments of this application can be applied to long-term evolution (LTE) systems or NR systems (also known as 5G systems), as well as other future-oriented new systems, and are not specifically limited thereto. Furthermore, the term "system" can be used interchangeably with "network".

[0099] like Figure 1 The diagram illustrates a communication system 10 provided in an embodiment of this application. The communication system 10 includes a network device 20 and one or more terminal devices 30 connected to the network device 20. The terminal devices 30 are wirelessly connected to the network device 20. Optionally, different terminal devices 30 can communicate with each other. The terminal devices 30 can be fixed in location or movable.

[0100] It should be noted that, Figure 1 This is merely a schematic diagram. Although not shown, the communication system 10 may also include other devices, such as one or more of a core network device, a wireless relay device, and a wireless backhaul device. No specific limitations are made here. The network device 20 can be connected to the core network device wirelessly or via a wired connection. The core network device and the network device 20 can be independent physical devices, or the functions of the core network device and the logical functions of the network device 20 can be integrated on the same physical device. Alternatively, a single physical device can integrate some of the functions of the core network device and some of the functions of the network device 20. This embodiment does not specifically limit these possibilities.

[0101] by Figure 1Taking the interaction between the network device 20 and any terminal device 30 as an example, in this embodiment, after determining the first DCI, the network device 20 sends the first DCI to the terminal device 30. Correspondingly, the terminal device 30 receives the first DCI from the network device 20. The first DCI is used for uplink or downlink data scheduling, has a fixed number of bits, and includes a first identifier indicating the format of the first DCI. The format of the first DCI includes either a first DCI format or a second DCI format. Furthermore, the terminal device 30 receives downlink data from the network device 20 or sends uplink data to the network device 20 based on the first DCI. The specific implementation of this scheme will be described in detail in subsequent method embodiments and will not be repeated here. Based on this scheme, since the number of bits in the first DCI is fixed and the first DCI has multiple DCI formats, meaning that a DCI size can be designed for multiple DCI formats, it not only reduces the complexity of DCI detection by the terminal device, thereby saving power consumption, but also ensures the diversity of data transmission and increases scheduling flexibility.

[0102] Optionally, the network device 20 in this application embodiment is a device that connects the terminal device 30 to a wireless network. It can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a wireless-fidelity (Wi-Fi) system; it can also be a module or unit that performs some of the functions of a base station, for example, a central unit (CU) or a distributed unit (DU). The embodiments of this application do not limit the specific technology or device form used in the network device. In this application, unless otherwise specified, network device refers to wireless access network device.

[0103] Optionally, the terminal device 30 in this application embodiment can be a device for implementing wireless communication functions, such as a terminal or a chip that can be used in a terminal. A terminal can also be called user equipment (UE), a mobile station, a mobile terminal, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality terminal device, augmented reality terminal device, wireless terminal in industrial control, wireless terminal in autonomous driving, wireless terminal in remote surgery, wireless terminal in smart grids, wireless terminal in transportation safety, wireless terminal in smart cities, wireless terminal in smart homes, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal device.

[0104] Optionally, the network device 20 and terminal device 30 in the embodiments of this application can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of the network device 20 and terminal device 30.

[0105] Optionally, in this embodiment, the network device 20 and the terminal device 30 can communicate using licensed spectrum, unlicensed spectrum, or both simultaneously. The network device 20 and the terminal device 30 can communicate using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. This embodiment does not limit the spectrum resources used between the network device 20 and the terminal device 30.

[0106] Optionally, the network device or terminal device in the embodiments of this application may also be referred to as a communication device. It may be a general-purpose device or a special-purpose device. The embodiments of this application do not specifically limit it in this regard.

[0107] Optionally, the relevant functions of the network device or terminal device in the embodiments of this application can be implemented by one device, multiple devices working together, or one or more functional modules within a single device. This application does not specifically limit these functions. It is understood that the aforementioned functions can be network elements in hardware devices, software functions running on dedicated hardware, a combination of hardware and software, or virtualization functions instantiated on a platform (e.g., a cloud platform).

[0108] For example, the relevant functions of the network device or terminal device in the embodiments of this application can be achieved through... Figure 2The communication equipment (also known as the communication device) 200 in the middle is used to implement this. Figure 2 The diagram shown is a structural schematic of a communication device 200 provided in an embodiment of this application. The communication device 200 includes one or more processors 201, a communication line 202, and at least one communication interface. Figure 2 (This is merely an example illustration, using a communication interface 204 and a processor 201 as examples. Optionally, a memory 203 may also be included.)

[0109] The processor 201 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0110] The communication line 202 may include a path for connecting different components.

[0111] The communication interface 204 can be a transceiver module used to communicate with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), etc. For example, the transceiver module can be a transceiver or similar device. Optionally, the communication interface 204 can also be a transceiver circuit located within the processor 201, used to implement the processor's signal input and signal output.

[0112] The memory 203 can be a device with storage functionality. For example, it can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions; random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions; electrically erasable programmable read-only memory (EEPROM); compact disc read-only memory (CD-ROM) or other optical disc storage; optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile optical discs, Blu-ray discs, etc.); magnetic disk storage media or other magnetic storage devices; or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. The memory can exist independently and be connected to the processor via communication line 202. The memory can also be integrated with the processor.

[0113] The memory 203 stores computer execution instructions for implementing the scheme of this application, and its execution is controlled by the processor 201. The processor 201 executes the computer execution instructions stored in the memory 203, thereby implementing the communication method provided in the embodiments of this application.

[0114] Alternatively, in this embodiment, the processor 201 may execute the processing-related functions of the communication method provided in the following embodiments of this application, and the communication interface 204 may be responsible for communicating with other devices or communication networks. This embodiment does not specifically limit this.

[0115] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0116] In a specific implementation, as one embodiment, the processor 201 may include one or more CPUs, for example... Figure 2 CPU0 and CPU1 in the CPU.

[0117] In a specific implementation, as one example, the communication device 200 may include multiple processors, such as... Figure 2 The processors 201 and 208 are described herein. Each of these processors may be a single-core processor or a multi-core processor. The processors herein may include, but are not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, and other computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform calculations or processing.

[0118] In a specific implementation, as one embodiment, the communication device 200 may further include an output device 205 and an input device 206. The output device 205 communicates with the processor 201 and can display information in various ways. For example, the output device 205 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 206 communicates with the processor 201 and can receive user input in various ways. For example, the input device 206 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0119] The aforementioned communication device 200 may sometimes be referred to as a communication apparatus, which can be a general-purpose device or a dedicated device. For example, communication device 200 may be a desktop computer, portable computer, network server, handheld computer (PDA), mobile phone, tablet computer, wireless terminal device, embedded device, the aforementioned terminal device, the aforementioned network device, or a device with... Figure 2 Devices with similar structures. This application does not limit the type of communication device 200 to any particular embodiment.

[0120] Combination Figure 2 The schematic diagram of the communication device 200 shown is exemplary. Figure 3 This is a specific structural form of the terminal device 30 provided in the embodiments of this application.

[0121] In some embodiments, Figure 2 The function of processor 201 in the middle can be achieved through Figure 3 The processor 110 is implemented in the system.

[0122] In some embodiments, Figure 2 The function of the communication interface 204 in the middle can be achieved through Figure 3 The terminal device 30 is implemented using antenna 1, antenna 2, mobile communication module 150, and wireless communication module 160. Mobile communication module 150 provides solutions for wireless communication technologies such as LTE, NR, or future mobile communication technologies applied to the terminal device 30. Wireless communication module 160 provides solutions for wireless communication technologies such as WLAN (e.g., Wi-Fi), Bluetooth, Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), and infrared technologies applied to the terminal device 30. In some embodiments, antenna 1 of the terminal device 30 is coupled to mobile communication module 150, and antenna 2 is coupled to wireless communication module 160, enabling the terminal device 30 to communicate with networks and other devices via wireless communication technologies.

[0123] In some embodiments, Figure 2 The function of memory 203 in the middle can be achieved through Figure 3 It can be implemented by internal memory 121 or external memory connected to external memory interface 120, etc.

[0124] In some embodiments, Figure 2 The function of the output device 205 can be achieved through Figure 3 The display screen 194 is implemented in the middle.

[0125] In some embodiments, Figure 2 The input device 206 can function through a mouse, keyboard, touch screen device, or Figure 3 This is achieved through the sensor module 180.

[0126] In some embodiments, such as Figure 3 As shown, the terminal device 30 may also include one or more of the following: an audio module 170, a camera 193, a button 190, a SIM card interface 195, a USB interface 130, a charging management module 140, a power management module 141, and a battery 142.

[0127] Understandable Figure 3 The structure shown does not constitute a specific limitation on the terminal device 30. For example, in other embodiments of this application, the terminal device 30 may include more or fewer components than shown, or combine some components, or split some components, or have different component arrangements. The components shown may be implemented in hardware, software, or a combination of software and hardware.

[0128] The following will combine Figures 1 to 3 ,by Figure 1 Taking the interaction between the network device 20 shown and any terminal device 30 as an example, the communication method provided in the embodiments of this application will be described in detail.

[0129] It should be noted that the message names between network elements or the names of parameters in the messages in the following embodiments of this application are just examples. Other names may be used in the specific implementation. This application does not limit them in this respect.

[0130] like Figure 4 As shown, this application provides a communication method, which includes the following steps S401 to S403.

[0131] S401. The network device determines a first DCI. The first DCI is used for uplink or downlink data scheduling. The number of bits in the first DCI is fixed. The first DCI includes a first identifier, which is used to indicate the format of the first DCI. The format of the first DCI includes either a first DCI format or a second DCI format.

[0132] S402, The network device sends the first DCI to the terminal device. Correspondingly, the terminal device receives the first DCI from the network device.

[0133] S403. The terminal device performs uplink or downlink data transmission with the network device according to the first DCI, such as receiving downlink data from the network device or sending uplink data to the network device.

[0134] The specific explanations of steps S401-S403 above are as follows:

[0135] In this embodiment, the first DCI is used for uplink data transmission scheduling, which can be understood as including uplink data transmission scheduling information (hereinafter referred to as uplink scheduling information); the first DCI is also used for downlink data transmission scheduling, which can be understood as including downlink data transmission scheduling information (hereinafter referred to as downlink scheduling information). Specifically, whether the first DCI is used for uplink data transmission scheduling or downlink data transmission scheduling can be explicitly or implicitly indicated by the information fields included in the first DCI.

[0136] For example, different values ​​of the 1 bit included in the first DCI can indicate whether the first DCI is used for uplink or downlink data transmission scheduling. For instance, a 1 bit value of 0 indicates that the first DCI is used for uplink data transmission scheduling, and a 1 bit value indicates that the first DCI is used for downlink data transmission scheduling; or, a 1 bit value of 1 indicates that the first DCI is used for downlink data transmission scheduling, and a 0 bit value indicates that the first DCI is used for uplink data transmission scheduling.

[0137] For example, a specific state of the information field included in the first DCI can be reused to indicate whether the first DCI is used for uplink or downlink data transmission scheduling. For instance, a certain information field included in the first control information corresponds to M bits. These M bits can represent 2^M (2 to the power of M) states. A subset of these 2^M states can be used to indicate whether the first DCI is used for uplink or downlink data transmission scheduling. Specifically, for example, all M bits being 1 indicates that the first DCI is used for uplink data transmission scheduling, and all M bits being 0 indicates that the first DCI is used for downlink data transmission scheduling; or, all M bits being 1 indicates that the first DCI is used for downlink data transmission scheduling, and all M bits being 0 indicates that the first DCI is used for uplink data transmission scheduling. The information field in the first DCI can be understood as an information bit field that implements the data transmission function, such as indicating the frequency resources used for data transmission, or indicating the time domain resources used for data transmission, etc.

[0138] In this embodiment, the first DCI is a terminal device-specific DCI. A terminal device-specific DCI can be understood as meaning that the first DCI is only valid for that terminal device. For example, the first DCI can be scrambled using the cell-radio network temporary identifier (C-RNTI) corresponding to the terminal device. Of course, other methods can also be used to scramble the first DCI, and this embodiment does not specifically limit this. In this embodiment, using the C-RNTI corresponding to the terminal device to scramble the first DCI can be understood as the C-RNTI being applied to the CRC parity check bit of the first DCI through scrambling. This is explained uniformly here and will not be elaborated further below.

[0139] In this embodiment of the application, the number of bits of the first DCI is fixed, which can be understood as the bit size (payload size) of the first DCI being fixed. For example, this can include at least one of the following understandings:

[0140] 1) The number of bits for each information field in the first DCI is a fixed value and does not vary with different radio resource control (RRC) signaling configuration parameters. For example, when an information field in the first DCI is used to indicate the time resource for transmitting data, the corresponding number of bits is 4 bits. Even if the network device configures different time resource parameters through RRC signaling, the number of bits for this information field remains 4 bits.

[0141] 2) The first DCI includes information fields associated with the RRC signaling configuration, but the number of bits corresponding to the first DCI is fixed. For example, the first DCI includes three different information fields, used to indicate the frequency resources for data transmission, the time-domain resources for data transmission, and the modulation and coding scheme (MCS). The number of bits corresponding to these three different information fields can be determined according to the RRC signaling configuration. For example, if the network device configures 16 frequency resources for data transmission via RRC signaling, the information field in the first control information indicating the frequency resources for data transmission can correspond to 4 bits; or, if the network device configures 8 frequency resources for data transmission via RRC signaling, the information field in the first control information indicating the frequency resources for transmission can correspond to 3 bits. In this case, although the number of bits corresponding to the information field indicating the frequency resources for data transmission can change, the number of bits corresponding to the first DCI must be fixed.

[0142] 3) The number of bits corresponding to the first DCI is related to the initial access parameters. In other words, the number of bits corresponding to the first DCI is variable, but the specific value (or the variable range of the number of bits corresponding to the first DCI) is only related to the initial access parameters. Once the initial access parameters are determined, the number of bits corresponding to the first DCI is fixed.

[0143] Optionally, in this embodiment, the initial access parameters are, for example, information included in the synchronization signal block (SSB). For example, the information included in the SSB may be SSB index information or control information carried by the physical broadcast channel (PBCH) included in the SSB, i.e., information indicated by the master information block (MIB). Specifically, the SSB index information may be, for example, an SSB time index, and the information indicated by the MIB may include, for example, information indicated by the PDCCH configuration system information block type 1 (pdcch-ConfigSIB1) in the MIB, or configuration information of control resource set #0 (CORESET#0) included in the MIB, etc. Here, CORESET#0 frequency resources correspond to the frequency resources of the initial bandwidth part (initial BWP), and CORESET#0 time resources correspond to the time resources including control information for scheduling public information transmission. For example, it can be represented by the search space (SS) corresponding to the control information for scheduling public information transmission. Public information transmission can be, for example, system information (SI) broadcast by network devices, paging messages broadcast by network devices, or random access responses (RAR) broadcast by network devices. For example, when CORESET#0 frequency resources correspond to 24 resource blocks (RBs), 48 RBs, and 96 RBs, the number of bits corresponding to the first DCI can be X1 bits, X2 bits, and X3 bits, respectively, where X1 ≤ X2 ≤ X3.

[0144] Alternatively, in this embodiment of the application, the initial access parameter is, for example, the bandwidth capability of the terminal device. For example, when the bandwidth capabilities of the terminal device are 5MHz, 10MHz, and 20MHz, the number of bits corresponding to the first DCI can be Y1 bits, Y2 bits, and Y3 bits, respectively, where Y1≤Y2≤Y3.

[0145] Optionally, in this embodiment, the number of bits in the first DCI can be designed to be the same as the number of bits in the second DCI, wherein the second DCI is used to schedule the transmission of common information. The common information here, as described above, can include: SI broadcast by the network device, paging information, or RAR, etc. That is, considering that before establishing a data transmission link with the network device, the terminal device will detect the common information transmitted by the network device (e.g., SI broadcast by the network device) to obtain the basic configuration information of the network device. Furthermore, the common information transmitted by the network device can also be implemented through DCI scheduling; that is, the network device can use DCI to indicate control information for scheduling the transmission of common information. The terminal device, by detecting this DCI, can determine the control information for scheduling the transmission of common information and receive the common information transmitted by the network device according to this control information. Therefore, in this embodiment, the number of bits in the first DCI can be designed to be the same as the number of bits in the second DCI for scheduling the transmission of common information, thereby further reducing the number of DCIs with different DCI sizes detected by the terminal device, thus saving power consumption of the terminal device. Optionally, in this embodiment, the terminal device can distinguish between the first DCI and the second DCI using different RNTIs.

[0146] When the public information is an SI broadcast by a network device, the second DCI includes control information that schedules SIB1 or other system information, such as SIB2, SIB3, etc. Furthermore, the second DCI may also include a system information radio network temporary identifier (SI-RNTI), for example, the second DCI can be implemented by scrambling the system information SI-RNTI.

[0147] Alternatively, when the public information is a paging message broadcast by a network device, the second DCI may include a paging radio network temporary identifier (P-RNTI), for example, the second DCI can be implemented by scrambling the P-RNTI.

[0148] Alternatively, when the public information is RAR information broadcast by a network device, the second DCI may include a random access radio network temporary identifier (RA-RNTI). For example, the second DCI can be implemented by scrambling the RA-RNTI.

[0149] Optionally, in this embodiment, the terminal device corresponding to the public information can be a first type of terminal device, meaning only a first type of terminal device can parse the public information; or, the terminal device corresponding to the public information can include both a first type of terminal device and a second type of terminal device, meaning both types of terminal devices can parse the public information. The capabilities of the first type of terminal device and the second type of terminal device differ. Figure 4 The terminal devices that interact with network devices are classified as Type I terminal devices.

[0150] Optionally, in the embodiments of this application, the difference in capabilities between the first type of terminal device and the second type of terminal device may include at least one of the following understandings:

[0151] a) The bandwidth capabilities of the first type of terminal device differ from those of the second type of terminal device. Optionally, the bandwidth capability of the first type of terminal device is less than that of the second type of terminal device. For example, the second type of terminal device can support data transmission using frequency resources and network devices with a maximum bandwidth of 100MHz on a single carrier simultaneously; while the first type of terminal device can support data transmission using frequency resources and network devices with a maximum bandwidth of 20MHz, 10MHz, or 5MHz on a single carrier simultaneously.

[0152] (b) The number of transceiver antennas for the first type of terminal device differs from that for the second type of terminal device. Optionally, the number of transceiver antennas for the first type of terminal device is less than that for the second type of terminal device. For example, the second type of terminal device may support 4 receive 2 transmit or 4 receive 1 transmit; while the first type of terminal device may support a maximum of 2 receive 1 transmit or a maximum of 1 receive 1 transmit.

[0153] c) The maximum uplink transmit power of the first type of terminal device differs from that of the second type of terminal device. Optionally, the maximum uplink transmit power of the first type of terminal device is lower than that of the second type of terminal device. For example, the maximum uplink transmit power of the second type of terminal device can be 23dBm or 26dBm, while the maximum uplink transmit power of the first type of terminal device can only be a value between 4dBm and 20dBm.

[0154] d) The protocol version of the first type of terminal device differs from the protocol version of the second type of terminal device. Optionally, the protocol version of the first type of terminal device is higher than that of the second type of terminal device. For example, the second type of terminal device is a terminal device of NR release 15 and / or NR release 16; while the first type of terminal device is a terminal device of NR release 17 and / or a terminal device of NR release 17 or later. In the embodiments of this application, terminal devices of NR release 16 and earlier can also be referred to as NR backward compatible (NR-Legacy) terminal devices, which will be uniformly stated here and will not be repeated below.

[0155] e) The carrier aggregation capabilities of the first type of terminal device differ from those of the second type of terminal device. Optionally, the carrier aggregation capability of the first type of terminal device is less than that of the second type of terminal device. For example, the second type of terminal device supports carrier aggregation, while the first type of terminal device does not. Another example is that both the first and second type of terminal devices support carrier aggregation, but the maximum number of carrier aggregations that the second type of terminal device can simultaneously support is greater than that of the first type of terminal device. For instance, the second type of terminal device can support aggregation of up to 5 or 32 carriers simultaneously, while the first type of terminal device can support aggregation of up to 2 carriers simultaneously.

[0156] f) The duplex capability of the first type of terminal device differs from that of the second type of terminal device. Optionally, the duplex capability of the first type of terminal device is less than that of the second type of terminal device. For example, the second type of terminal device may support full-duplex frequency division duplexing (FDD), or both full-duplex FDD and half-duplex FDD; while the first type of terminal device only supports half-duplex FDD.

[0157] g) The data processing time capability of the first type of terminal device differs from that of the second type of terminal device. Optionally, the data processing time capability of the first type of terminal device is less than that of the second type of terminal device. In this embodiment, the difference in data processing time capability can be represented by the relationship between the minimum latency of data processing by the two types of terminal devices, the relationship between the maximum latency of data processing by the two types of terminal devices, or the relationship between the minimum latency of data processing by one type of terminal device and the maximum latency of data processing by the other type of terminal device. The data processing latency can be represented in at least one of the following ways: the latency between receiving downlink data and sending a hybrid automatic repeat request (HARQ) feedback for that downlink data; the latency between sending uplink data and receiving HARQ feedback for that uplink data; or the latency between receiving control information and sending uplink data based on that control information. For example, the minimum latency between the second type of terminal device receiving downlink data and sending HARQ feedback on the downlink data is less than the minimum latency between the first type of terminal device receiving downlink data and sending HARQ feedback on the downlink data, and / or, the minimum latency between the second type of terminal device sending uplink data and receiving HARQ feedback on the uplink data is less than the minimum latency between the first type of terminal device sending uplink data and receiving HARQ feedback on the uplink data, and / or, the minimum latency between the second type of terminal device receiving control information and sending uplink data according to the control information is less than the minimum latency between the first type of terminal device receiving control information and sending uplink data according to the control information.

[0158] h) The processing capabilities of the first type of terminal device differ from those of the second type of terminal device. Optionally, the processing capability of the first type of terminal device is less than that of the second type of terminal device. In the embodiments of this application, the processing capability of the terminal device includes, but is not limited to, at least one of the following: the number of HARQ processes supported for uplink and / or downlink data transmission, the size of the soft buffer, and the highest quadrature amplitude modulation (QAM) supported for uplink and / or downlink data transmission.

[0159] i) The peak uplink and / or peak downlink data transmission rates corresponding to the first type of terminal device are different from those corresponding to the second type of terminal device. Optionally, the peak uplink and / or peak downlink data transmission rates corresponding to the first type of terminal device are lower than those corresponding to the second type of terminal device.

[0160] For example, in the embodiments of this application, the first type of terminal device can be an NR-light terminal device, and the second type of terminal device can be a non-NR-Light terminal device or a terminal device that has both NR-light and non-NR-light functions (e.g., NR release 15 and / or NR release 16 terminal devices, or terminal devices that evolve in future wireless communication systems, not limited to LTE terminal devices and NR terminal devices).

[0161] Alternatively, for example, both the first type of terminal device and the second type of terminal device can be NR-light terminal devices. However, the capabilities of the first type of terminal device are less than those of the second type of terminal device. A comparison of the capabilities of the two types of terminal devices can be found in the above description and will not be repeated here. For instance, the second type of terminal device can have a maximum data transmission bandwidth of 20MHz on a single carrier, while the first type of terminal device has a maximum data transmission bandwidth of 10MHz on a single carrier.

[0162] Alternatively, for example, the first type of terminal device can be an NR REDCAP terminal device; the second type of terminal device can be a non-NR REDCAP terminal device. According to the protocol version, in this embodiment of the application, the aforementioned NRLegacy terminal device can be considered a non-NR REDCAP terminal device, while some terminal devices from NR release 17 and / or later versions can be considered NR REDCAP terminal devices, such as terminal devices with NR REDCAP capabilities, or terminal devices that simultaneously possess both non-NR REDCAP and NR REDCAP capabilities.

[0163] In this embodiment of the application, when the terminal device corresponding to the public information may include a first type of terminal device and a second type of terminal device, it also means that the first type of terminal device and the second type of terminal device can receive the same public information. Therefore, the second DCI received by the first type of terminal device and the second type of terminal device for scheduling the transmission of public information is the same. From the network device side, this design allows the same DCI to be sent to different types of terminal devices to indicate the transmission of public information, reducing the overhead of the network device sending public information (the overhead of public information includes the resource overhead corresponding to the DCI for scheduling the transmission of public information, or the overhead of public information includes both the DCI for scheduling the transmission of public information and the resource overhead corresponding to the transmission of public information), thereby saving power consumption on the network device side.

[0164] Optionally, in this embodiment of the application, the number of bits of the first DCI is the same as the number of bits of the second DCI, which may include:

[0165] The total number of bits in all information fields included in the first DCI is the same as the total number of bits in all information fields included in the second DCI.

[0166] Alternatively, the number of original information bits in the first DCI is the same as the number of original information bits in the second DCI. In this embodiment, the number of original information bits refers to the number of bits transmitted before the CRC operation. The number of original information bits may include the number of bits corresponding to zero-padding bits, or in other words, the number of original information bits may include zero-padding bits. Zero-padding bits can be understood as bits with a value of 0 added to the DCI to make the DCI bit count reach a specific value.

[0167] Alternatively, the number of bits in the first DCI before performing the channel coding operation is the same as the number of bits in the second DCI before performing the channel coding operation.

[0168] Alternatively, the number of modulation symbols transmitted for the first DCI is the same as the number of modulation symbols transmitted for the second DCI.

[0169] Alternatively, the number of bits corresponding to the modulation symbol transmitted in the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbol transmitted in the second DCI after demodulation.

[0170] It should be noted that in the embodiments of this application, the total number of bits in all information fields included in the first DCI is the same as the total number of bits in all information fields included in the second DCI. This can be understood as the total number of effective bits corresponding to all information fields included in the first DCI being the same as the total number of effective bits corresponding to all information fields included in the second DCI; or, the total number of effective bits corresponding to all information fields included in the first DCI being different from the total number of effective bits corresponding to all information fields included in the second DCI, but this can be achieved by zero padding or truncating to make the total number of bits in all information fields included in the first DCI the same as the total number of bits included in the second DCI. Here, the effective number of bits can be understood as the number of bits corresponding to bits that are not zero-padding bits. For example, the number of bits corresponding to the first DCI after multiplexing information elements is S1 bits, and the number of bits corresponding to the second DCI after multiplexing information elements is S2 bits, where S1 is not equal to S2. If S1 is less than S2, the number of bits in the first DCI can be adjusted to be equal to the number of bits in the second DCI by adding zero-padding bits. The number of zero-padding bits added is S2-S1. If S1 is greater than S2, the number of bits in the first DCI can be adjusted to be equal to the number of bits in the second DCI by truncation. The number of bits discarded in the first DCI is S1-S2.

[0171] Optionally, in the embodiments of this application, the first identifier in the first DCI can be explicitly or implicitly indicated by the information fields included in the first DCI. The implementation of explicit or implicit indication can refer to the above-mentioned method of indicating the first DCI for uplink or downlink data transmission scheduling, which will not be repeated here.

[0172] Optionally, in the embodiments of this application, the number of bits in each information field of the first DCI having the first DCI format is fixed.

[0173] In this context, the number of bits in each information field of the first DCI with the first DCI format is fixed. This can be understood as the number of information bits in all information fields of the first DCI with the first DCI format being fixed. For a description of the fixed number of information bits, please refer to the first and third points above regarding the fixed number of bits in the first DCI, which will not be repeated here.

[0174] Optionally, in this embodiment of the application, the first DCI having the first DCI format includes one or more of the following information fields:

[0175] The first information field indicates frequency domain resource allocation information. This frequency domain resource allocation information refers to the frequency domain resources used for data transmission scheduled by the first DCI. The number of bits corresponding to the first information field is fixed.

[0176] The second information field indicates time-domain resource allocation information. This time-domain resource allocation information refers to the time resources used for data transmission scheduled by the first DCI. The number of bits in the second information field is fixed.

[0177] The third information field indicates the modulation and coding scheme (MCS). For example, it indicates the modulation scheme and target code rate used for the data transmission scheduled by the first DCI. The modulation scheme may include, for example, quadrature phase shift keying (QPSK), 16QAM, 64QAM, etc. The target code rate can be represented as the ratio between the first number of bits and the second number of bits, where the first number of bits is the number of bits corresponding to the original information of the transmitted data after channel coding, and the second number of bits is the sum of the number of bits corresponding to all modulation symbols of the data transmission. The size of the third information field is fixed.

[0178] The fourth information field indicates the redundancy version (RV). Here, RV refers to the RV used for data transmission scheduled by the first DCI. Based on the RV indication, the terminal device can determine the information bits to be transmitted after channel coding. The number of bits corresponding to the fourth information field is fixed.

[0179] Alternatively, the fifth information field indicates the HARQ process number. Here, the HARQ process number refers to the HARQ process number corresponding to the data transmission scheduled by the first DCI. Based on the HARQ process number, the terminal device can distinguish different HARQ process data sent by the network device. Furthermore, when data reception errors occur, it can merge data from the same HARQ process to improve data reception reliability. Alternatively, for uplink data transmission, the network device can distinguish different HARQ process data sent by the terminal device based on the HARQ process number and merge data from the same HARQ process. The number of bits in the fifth information field is fixed.

[0180] Optionally, when the first DCI is used for downlink data scheduling, the first DCI with the first DCI format may also include one or more of the following information fields:

[0181] The sixth information field indicates the transmission power control (TPC) information for the physical uplink control channel (PUCCH). When transmitting the PUCCH, the terminal device adjusts the uplink transmission power used based on this information field to determine the appropriate uplink transmission power. The number of bits in the sixth information field is fixed.

[0182] The seventh information field indicates the PUCCH resources. Based on this field, the terminal device can determine the PUCCH resources used to send uplink control information. These PUCCH resources include, but are not limited to: the time-frequency resources corresponding to the PUCCH, the PUCCH format used by the terminal device to send HARQ-ACK messages on those resources, and whether the terminal device uses in-slot frequency hopping transmission when sending HARQ-ACK messages using those resources. The number of bits in the seventh information field is fixed. HARQ-ACK includes acknowledgment (ACK) and negative acknowledgement (NACK).

[0183] Alternatively, the eighth information field indicates the timing relationship between the downlink data transmission scheduled by the first DCI and the HARQ feedback. The HARQ feedback is provided by the terminal device based on whether it has correctly received the downlink data sent by the network device. If the reception is correct, an ACK is returned; otherwise, a NACK is returned. After receiving the physical downlink shared channel (PDSCH), the terminal device can determine the feedback delay of the HARQ feedback corresponding to that PDSCH based on this information field, and thus determine the timing of the HARQ feedback. The number of bits corresponding to the eighth information field is fixed.

[0184] Optionally, when the first DCI is used for uplink data scheduling, the first DCI having the first DCI format may further include:

[0185] The ninth information field is used to indicate the TPC information for scheduling the physical uplink shared channel (PUSCH). When transmitting the PUSCH scheduled by the first DCI, the terminal device adjusts the uplink transmission power used for PUSCH transmission based on this information field to determine the uplink transmission power used for PUSCH transmission. The number of bits corresponding to this information field is fixed.

[0186] Optionally, in this embodiment of the application, the number of information bits in the information fields of the first DCI having the second DCI format is configurable.

[0187] In one possible implementation, the information fields included in the second DCI format can be described from the following dimensions:

[0188] On one hand, optionally, the first DCI with the second DCI format includes one or more information fields from the information fields included in the first DCI with the first DCI format. When the first DCI with the first DCI format and the first DCI with the second DCI format include the same information field, the number of information bits corresponding to that information field can be the same or different. For example, if both the first DCI with the first DCI format and the first DCI with the second DCI format include the aforementioned second information field, in the first DCI with the first DCI format, the second information field can occupy 4 bits, meaning it can indicate a maximum of 16 different time resources; in the first DCI with the second DCI format, the second information field can also correspond to 4 bits, or it can correspond to M bits according to the RRC signaling configuration, where M is an integer other than 4. For example, a first DCI with a first DCI format includes X1 bits for indicating the MCS, while a first DCI with a second DCI format can use X1-X2 bits for indicating the MCS, and use X2 bits to implement other functions of RRC configuration, such as configuration information associated with triggering aperiodic channel state information (CSI) reporting. This application embodiment does not specifically limit this.

[0189] On the other hand, optionally, the first DCI having the second DCI format also includes information fields not included in the first DCI having the first DCI format, for example, it may include at least one of the following information fields:

[0190] The tenth information field is used to indicate control information related to multi-antenna data transmission, such as antenna port indication.

[0191] The eleventh information field is used to indicate control information related to the code block group (CBG), such as code block group transmission information (CBGTI) and code block group flushing out information (CBGFI).

[0192] The twelfth information field is used to indicate beam-related control information, such as transmission configuration indication (TCI).

[0193] The thirteenth information field is used to indicate carrier-related control information, such as the downlink assignment index (DAI) and the supplementary uplink (SUL) indication.

[0194] The fourteenth information field is used to indicate control information for BWP switching. For example, if the network device configures four BWPs for the terminal device, the fourteenth information field can use 2 bits to indicate the BWP carrying data transmission. This data transmission is achieved through the first DCI scheduling, which includes the fourteenth information field. BWP switching here can be understood as the data transmission between the network device and the terminal device switching from one BWP to another.

[0195] In another possible implementation, the information fields included in the second DCI format can also be described from the following dimensions:

[0196] The first DCI with the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function. The information field for the first data transmission function can be implemented using X bits, and the information field for the second data transmission function can be implemented using Y bits. The sum of X and Y is not greater than the number of bits in the first DCI.

[0197] In this embodiment of the application, the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

[0198] Optionally, in this embodiment of the application, the information field used for the first data transmission function includes one or more of the following information fields:

[0199] The information fields are: a first information field, a second information field, a third information field, a fourth information field, or a fifth information field. The descriptions of the first to fifth information fields can be found in the above embodiments and will not be repeated here.

[0200] Optionally, when the first DCI is used for downlink data scheduling, the information field used for the first data transmission function may further include one or more of the following information fields:

[0201] The sixth, seventh, or eighth information domains, wherein the relevant descriptions of the sixth to eighth information domains can be referred to the above embodiments and will not be repeated here.

[0202] Optionally, when the first DCI is used for uplink data scheduling, the information field used for the first data transmission function further includes:

[0203] The ninth information domain, the relevant description of which can be referred to the above embodiments, will not be repeated here.

[0204] Optionally, in this embodiment of the application, the information field used for the second data transmission function includes one or more of the following information fields:

[0205] The tenth, eleventh, twelfth, thirteenth, or fourteenth information domains, wherein the relevant descriptions of the tenth to fourteenth information domains can be referred to the above embodiments and will not be repeated here.

[0206] Optionally, in this embodiment, the first DCI with the second DCI format may include aperiodic CSI trigger indication information, which is used to instruct the terminal device to report aperiodic CSI measurement results. Through this implementation, the network device can flexibly instruct the terminal device whether to report aperiodic CSI measurement results according to data transmission requirements. For example, when the data transmission channel state between the network device and the terminal device changes rapidly, the network device can instruct the terminal device to report aperiodic CSI measurement results through the information field in the first DCI with the second DCI format. Alternatively, when the data transmission channel between the network device and the terminal device changes slowly, the network device can determine the data transmission channel quality between itself and the terminal device through the periodically reported CSI. In this case, the network device can instruct the terminal device not to report aperiodic CSI measurement results through this information field, or it can instruct the terminal device not to report aperiodic CSI measurement results by distinguishing between the indication fields of the first DCI format and the second DCI format. In this case, by default, the first DCI with the first DCI format does not support the indication of aperiodic CSI measurement result reporting; that is, the first DCI with the first DCI format does not include the indication information for aperiodic CSI triggering. Based on this, non-periodic CSI reporting by terminal devices can be flexibly implemented, ensuring data transmission efficiency.

[0207] Optionally, in this embodiment, whether the information field of the second data transmission function is effective can be indicated by a control field in the first DCI with the second DCI format in a bitmap or binary manner, wherein the parameter information corresponding to the effective information field is configured by RRC signaling; or, whether the information field of the second data transmission function is effective can also be directly implemented by RRC signaling configuration.

[0208] In one possible implementation, the control field in a first DCI with a second DCI format can be used as a bitmap to indicate whether the information fields of the second data transmission function are active. For example, in a first DCI with a second DCI format, Y1 bits are used to indicate Y1 types of information fields. If the corresponding bit is 1, it indicates that the information field corresponding to that bit is active, or that the information field corresponding to that bit is enabled. After enabling the information field corresponding to that bit, the parameter information (such as parameter configuration or bit size) of that information field can be configured through the corresponding RRC signaling. For example, 2 bits can be used to indicate that the first DCI with a second DCI format includes information field 1 and information field 2, and the parameter information corresponding to information field 1 and information field 2 can be configured in conjunction with RRC signaling.

[0209] In another possible implementation, the control field in the first DCI with the second DCI format can be used to indicate in binary whether the information field of the second data transmission function is active. For example, Y bits can correspond to 2 Y Different information domains, through 2 Y The specific value of Y can determine the enabled information domain. After enabling the corresponding information domain, the parameter information (such as parameter configuration or bit size) corresponding to that information domain can be implemented through the corresponding RRC signaling configuration. For example, if Y = 2, then Y bits can correspond to four information domains. These Y bits indicate when one of the information domains is active, such as indicating when the control information related to multi-antenna data transmission is active. The terminal device can then combine the RRC signaling configuration to determine the specific configuration information corresponding to multi-antenna data transmission, such as the number of DMRS ports, or the DMRS port transmission type (e.g., DMRS type 1 or DMRS type 2), or the symbol position occupied by the DMRS transmission in time (e.g., DMRS mapping type A or DMRS mapping type B), or the mapping relationship between each layer of transmission and the DMRS port when the terminal device performs multi-layer transmission. In the embodiments of this application, the RRC signaling used to indicate the specific parameter information corresponding to the information domain can be carried by the PDSCH of the first DCI scheduling with the first DCI format.

[0210] In another possible implementation, multiple information fields in a first DCI with a second DCI format can share the same bits. When one information field is enabled, the remaining bits can further indicate the parameter information corresponding to the enabled information field. For example, a first DCI with a second DCI format includes 4 bits, and the second data transmission function occupies 4 bits and uses a bitmap to indicate the enabled information fields. When only 1 bit is used to enable one information field of the second data transmission function, such as enabling MIMO data transmission related configurations, the other 3 bits can be used to indicate up to 8 different MIMO data transmission related configurations. For example, when only 2 bits are used to enable two different information fields of the second data transmission function, such as enabling MIMO data transmission related configuration and CBG data transmission related configuration, the other 2 bits can provide further refined indications for the RRC configurations corresponding to these two functions respectively. For example, these 2 bits correspond to MIMO data transmission related configuration and CBG data transmission related configuration respectively. That is, the value of one bit in the 2 bits can indicate the two different configurations corresponding to MIMO data transmission, and the value of the other bit in the 2 bits can indicate the two different configurations corresponding to CBG data transmission. Alternatively, the 2 bits can also indicate the joint RRC configuration of MIMO data transmission related configuration and CBG data transmission related configuration. That is, these 2 bits can correspond to four states, and each state can indicate MIMO data transmission related configuration and / or CBG data transmission related configuration.

[0211] In this embodiment, for a first DCI with a second DCI format, when the specific configuration parameters of the information field are implemented through RRC configuration, the RRC configuration signaling can be carried by the PDSCH scheduled by the first DCI with the first DCI format. Since the number of information field bits corresponding to the first DCI with the first DCI format is fixed, the terminal device can determine the scheduling information indicated by the first DCI by detecting the first DCI format, and then receive the PDSCH to obtain the RRC configuration signaling. Furthermore, there is no issue of ambiguous RRC signaling configuration when the terminal device detects the first DCI with the first DCI format.

[0212] In summary, since the number of information bits in at least one information field of the first DCI with the second DCI format in the embodiments of this application is configurable, for example, it can be configured through RRC signaling, thus increasing the flexibility of scheduling.

[0213] For example, in the embodiments of this application, the first DCI with the first DCI format may correspond to existing fall back downlink control information (FB DCI); the first DCI with the second DCI format may correspond to existing non-fall back down control information (non-FB DCI). This is explained uniformly here and will not be repeated below.

[0214] Optionally, in this embodiment, the first DCI with a first DCI format and the first DCI with a second DCI format can correspond to the same data transmission direction. For example, both the first DCI with the first DCI format and the first DCI with the second DCI format are used to indicate downlink data transmission configuration, or both are used to indicate uplink data transmission configuration.

[0215] Optionally, in this embodiment, the first DCI can correspond to different types of NR REDCAP terminal devices. For example, NR REDCAP terminal devices are divided into low-end, mid-range, and high-end terminal devices, and the aforementioned second data transmission function can vary for different types of NR REDCAP terminal devices. This embodiment does not specifically limit this.

[0216] Optionally, in this embodiment, the control channel used to carry the first DCI may be, for example, a PDCCH, an enhanced PDCCH (EPDCCH), an MTC PDCCH (MPDCCH), a narrowband PDCCH (NPDCCH), or other channels newly defined in future communication protocols that have the same or similar function as the downlink control channel. This embodiment does not specifically limit the type and name of the control channel.

[0217] Optionally, in the embodiments of this application, it is possible to... Figure 4The terminal device shown is configured with only a DCI format of the first DCI bit size or only detects a DCI format of the first DCI bit size within its corresponding user-specific search space (USS). That is, the terminal device detects the first DCI in the USS, which is configured with only a DCI format of the first DCI bit size; or, the terminal device detects only a DCI format of the first DCI bit size in the USS; or, within the USS configured by the network device for the terminal device, the network device only configures a DCI format of the first DCI bit size for that terminal device. It should be noted that the USS here refers to one or more USS (including all configured USS) of at least one USS configured by the network device for the terminal device. As mentioned above, there can be one or more DCI formats of the first DCI bit size. Different DCI formats can be distinguished, for example, by different RNTIs or by control fields included in the first DCI. For example, the two DCI formats can be the first DCI format and the second DCI format described above. Since only a DCI format with the first DCI bit size is configured in the USS, the terminal device only needs to detect one DCI format size in the USS. Compared with the prior art, where the terminal device can detect at most two DCI formats size in the USS, this solution can reduce the complexity of DCI detection by the terminal device, thereby saving the power consumption of the terminal device.

[0218] Optionally, in the embodiments of this application, it is possible to... Figure 4The terminal device shown in the diagram detects only DCI formats with the first DCI bit size within its corresponding USS and Common Search Space (CSS). Alternatively, within the USS and CSS configured by the network device for the terminal device, the network device only configures DCI formats with the first DCI bit size for that terminal device. As described above, the USS here refers to one or more USS (including all configured USS) among at least one USS configured by the network device for the terminal device, and the CSS refers to one or more CSS (including all configured CSS) among at least one CSS configured by the network device for the terminal device. As mentioned above, there can be one or more DCI formats with the first DCI bit size. Different DCI formats can be distinguished, for example, by different RNTIs, or by control fields included in the first DCI. For example, the two DCI formats can be the first DCI format and the second DCI format described above. For terminal devices, when only a DCI format with the first DCI bit size is configured in all configured USS and all CSS, the terminal device only needs to detect a maximum of 1 DCI format with DCI size. Compared with the prior art, where the terminal device can detect a maximum of 4 DCI formats with DCI size in CSS and USS, this solution can reduce the complexity of DCI detection for the terminal device, thereby saving power consumption of the terminal device.

[0219] The actions of the terminal device or network device in steps S401 to S403 above can be performed by... Figure 2 The processor 201 in the communication device 200 shown calls the application code stored in the memory 203 to execute it, and this embodiment does not impose any restrictions on this.

[0220] It is understood that, in the above embodiments, the methods and / or steps implemented by the terminal device can also be implemented by a module (such as a chip or chip system) applied to the terminal device, and the methods and / or steps implemented by the network device can also be implemented by a module (such as a chip or chip system) applied to the network device.

[0221] The above mainly describes the solutions provided by the embodiments of this application from the perspective of interaction between various network elements. Correspondingly, the embodiments of this application also provide a communication device for implementing the various methods described above. This communication device can be a terminal device in the above method embodiments or a module (such as a chip or chip system) applied to a terminal device; or, the communication device can be a network device in the above method embodiments or a module (such as a chip or chip system) applied to a network device. It is understood that, in order to achieve the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art 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 application.

[0222] Figure 5 This is a schematic diagram of the structure of a possible communication device 50 provided for an embodiment of this application. The communication device 50 may be as follows: Figure 1 The terminal device 30 shown can also be a module (such as a chip or chip system) applied to the terminal device 30. For example... Figure 5 As shown, the communication device 50 includes a transceiver module 501. The transceiver module 501, also known as a transceiver unit, is used to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver device, or a communication interface.

[0223] Optionally, in this embodiment, when the communication device 50 is a terminal device, the transceiver module 501 can be a transmitting module or a transmitter when sending information; the transceiver module 501 can be a receiving module or a receiver when receiving information. The transceiver, transmitter, or receiver mentioned above can be a radio frequency circuit, and this embodiment does not specifically limit it.

[0224] Optionally, in this embodiment of the application, when the communication device 50 is a module (such as a chip or chip system) applied to the terminal device 30, the transceiver module 501 may be an input and / or output interface, pin, or circuit, etc.

[0225] The transceiver module 501 is configured to receive a first DCI from the network device. The first DCI is used for uplink or downlink data scheduling. The first DCI has a fixed number of bits and includes a first identifier indicating the format of the first DCI. The format of the first DCI may include a first DCI format or a second DCI format. The transceiver module 501 is also configured to receive downlink data from the network device or send uplink data to the network device based on the first DCI.

[0226] Optionally, the number of information bits in the information fields of the first DCI having the second DCI format is configurable.

[0227] Optionally, the number of bits in each information field of the first DCI with the first DCI format is fixed.

[0228] Optionally, the number of bits in the first DCI is fixed, including: the number of bits in each information field included in the first DCI is fixed; or, the first DCI includes information fields associated with RRC signaling configuration, but the number of bits corresponding to the first DCI is fixed; or, the number of bits corresponding to the first DCI is related to the initial access parameters.

[0229] Optionally, the number of bits in the first DCI is the same as the number of bits in the second DCI, wherein the second DCI is used to schedule the transmission of common information.

[0230] Optionally, the communication device corresponding to the public information is a first type of communication device; or, the communication device corresponding to the public information includes a first type of communication device and a second type of communication device, wherein the capabilities of the first type of communication device and the second type of communication device are different.

[0231] Optionally, when the public information is system information, the second DCI includes control information of scheduling system information block type 1 or other system information, wherein the second DCI is scrambled by SI-RNTI.

[0232] Optionally, the public information is a paging message, and the second DCI is scrambled via P-RNTI.

[0233] Optionally, the public information is RAR information, and the second DCI is scrambled via RA-RNTI.

[0234] Optionally, the number of bits in the first DCI is the same as the number of bits in the second DCI, including: the total number of bits in all information fields included in the first DCI is the same as the total number of bits in all information fields included in the second DCI; or, the original number of bits in the first DCI is the same as the original number of bits in the second DCI, wherein the original number of bits is the number of bits in the DCI transmission before the CRC operation is performed; or, the number of bits in the first DCI before the channel coding operation is the same as the number of bits in the second DCI before the channel coding operation is performed; or, the number of modulation symbols transmitted corresponding to the first DCI is the same as the number of modulation symbols transmitted corresponding to the second DCI; or, the number of bits corresponding to the modulation symbols transmitted corresponding to the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols transmitted corresponding to the second DCI after demodulation.

[0235] Optionally, the first DCI having the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

[0236] Optionally, whether the information field of the second data transmission function is effective is indicated by a control field in the first DCI with the second DCI format in bitmap or binary form, wherein the parameter information corresponding to the effective information field is configured by RRC signaling.

[0237] Optionally, only a DCI format with the first DCI bit size may be configured in the USS corresponding to the communication device 50.

[0238] For a more detailed description of the aforementioned transceiver module 501, please refer to [link / reference needed]. Figure 4 The relevant descriptions in the method embodiments shown are directly obtained and will not be repeated here.

[0239] In this embodiment, the communication device 50 is presented in an integrated manner, divided into various functional modules. Here, "module" can refer to a specific ASIC, circuitry, a processor and memory executing one or more software or firmware programs, integrated logic circuitry, and / or other devices that can provide the aforementioned functions. In a simple embodiment, when the communication device 50 is used to implement... Figure 4 When considering the functionality of the terminal device in the illustrated method embodiment, those skilled in the art will understand that the communication device 50 can employ... Figure 2 The communication device 200 shown is in the form of [example device].

[0240] for example, Figure 2The processor 201 in the communication device 200 shown can execute the communication method in the above method embodiment by calling the computer execution instructions stored in the memory 203.

[0241] Specifically, Figure 5 The function / implementation process of the transceiver module 501 can be obtained through Figure 2 The processor 201 in the communication device 200 shown calls computer execution instructions stored in memory 203 to implement the function. Alternatively, Figure 5 The function / implementation process of the transceiver module 501 can be obtained through Figure 2 This is achieved through the communication interface 204 in the communication device 200 shown.

[0242] Optionally, in this embodiment, when the communication device 50 is a module (such as a chip or chip system) applied to a terminal device, the memory 203 can be a storage unit within the chip or chip system, such as a register or cache; it can also be a storage unit located outside the chip or chip system within the terminal device, such as a ROM or other types of static storage devices that can store static information and instructions, such as RAM. This embodiment does not specifically limit this.

[0243] Optionally, in this embodiment, when the communication device 50 is a chip system applied to a terminal device, it may be composed of a chip or may include a chip and other discrete devices. This embodiment does not specifically limit this.

[0244] Since the communication device 50 provided in this embodiment can perform... Figure 4 The communication method provided in the illustrated embodiment can be used as a reference for the technical effects it achieves. Figure 4 The embodiments shown will not be described in detail here.

[0245] Figure 6 A schematic diagram of another possible communication device 60 provided for embodiments of this application. The communication device 60 may be as follows: Figure 1 The network device 20 shown can also be a module (such as a chip) applied to the network device 20. For example... Figure 6 As shown, the communication device 60 includes a transceiver module 601 and a processing module 602. The transceiver module 601, also known as a transceiver unit, is used to implement transceiver functions, and may be, for example, a transceiver circuit, a transceiver, a transceiver device, or a communication interface.

[0246] Optionally, in this embodiment, when the communication device 60 is a network device, the transceiver module 601 can be a transmitting module or a transmitter when sending information; the transceiver module 601 can be a receiving module or a receiver when receiving information. The transceiver, transmitter, or receiver mentioned above can be a radio frequency circuit, and this embodiment does not specifically limit it.

[0247] Optionally, in this embodiment of the application, when the communication device 60 is a module (such as a chip or chip system) applied to a network device, the transceiver module 601 may be an input and / or output interface, pin, or circuit, etc.

[0248] The processing module 602 is used to determine the first DCI, which is used for uplink or downlink data scheduling. The number of bits in the first DCI is fixed. The first DCI includes a first identifier, which is used to indicate the format of the first DCI. The format of the first DCI includes a first DCI format or a second DCI format. The transceiver module 601 is used to send the first DCI to the terminal device.

[0249] Optionally, the number of information bits in the information fields of the first DCI having the second DCI format is configurable.

[0250] Optionally, the number of information bits in the information fields of the first DCI having the second DCI format is configurable.

[0251] Optionally, the number of bits in the first DCI is fixed, including: the number of bits in each information field included in the first DCI is fixed; or, the first DCI includes information fields associated with RRC signaling configuration, but the number of bits corresponding to the first DCI is fixed; or, the number of bits corresponding to the first DCI is related to the initial access parameters.

[0252] Optionally, the number of bits in the first DCI is the same as the number of bits in the second DCI, wherein the second DCI is used to schedule the transmission of common information.

[0253] Optionally, the terminal device corresponding to the public information is a first type of terminal device; or, the terminal device corresponding to the public information includes a first type of terminal device and a second type of terminal device, wherein the capabilities of the first type of terminal device and the second type of terminal device are different.

[0254] Optionally, when the public information is system information, the second DCI includes control information of scheduling system information block type 1 or other system information, wherein the second DCI is scrambled by SI-RNTI.

[0255] Optionally, the public information is a paging message, and the second DCI is scrambled via P-RNTI.

[0256] Optionally, the public information is RAR information, and the second DCI is scrambled via RA-RNTI.

[0257] Optionally, the number of bits in the first DCI is the same as the number of bits in the second DCI, including: the total number of bits in all information fields included in the first DCI is the same as the total number of bits in all information fields included in the second DCI; or, the original number of bits in the first DCI is the same as the original number of bits in the second DCI, wherein the original number of bits is the number of bits in the DCI transmission before the CRC operation is performed; or, the number of bits in the first DCI before the channel coding operation is the same as the number of bits in the second DCI before the channel coding operation is performed; or, the number of modulation symbols transmitted corresponding to the first DCI is the same as the number of modulation symbols transmitted corresponding to the second DCI; or, the number of bits corresponding to the modulation symbols transmitted corresponding to the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols transmitted corresponding to the second DCI after demodulation.

[0258] Optionally, the first DCI having the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

[0259] Optionally, whether the information field of the second data transmission function is effective is indicated by a control field in the first DCI with the second DCI format in bitmap or binary form, wherein the parameter information corresponding to the effective information field is configured by RRC signaling.

[0260] Optionally, only the DCI format with the first DCI bit size can be configured in the USS corresponding to the terminal device.

[0261] For a more detailed description of the transceiver module 601 and the processing module 602 mentioned above, please refer to [link / reference]. Figure 4 The relevant descriptions in the method embodiments shown are directly obtained and will not be repeated here.

[0262] In this embodiment, the communication device 60 is presented in an integrated manner, divided into various functional modules. Here, "module" can refer to a specific ASIC, circuitry, a processor and memory executing one or more software or firmware programs, integrated logic circuitry, and / or other devices that can provide the aforementioned functions. In a simple embodiment, when the communication device 60 is used to implement... Figure 4 When considering the functionality of the network device in the illustrated method embodiment, those skilled in the art will understand that the communication device 60 can employ... Figure 2 The communication device 200 shown is in the form of [example device].

[0263] for example, Figure 2 The processor 201 in the communication device 200 shown can execute the communication method in the above method embodiment by calling the computer execution instructions stored in the memory 203.

[0264] Specifically, Figure 6 The functions / implementation process of the transceiver module 601 and the processing module 602 can be obtained through Figure 2 The processor 201 in the communication device 200 shown calls computer execution instructions stored in memory 203 to implement the function. Alternatively, Figure 6 The function / implementation process of the processing module 602 can be achieved through... Figure 2 The processor 201 in the communication device 200 shown calls computer execution instructions stored in memory 203 to implement this. Figure 6 The function / implementation process of the transceiver module 601 can be obtained through Figure 2 This is achieved through the communication interface 204 in the communication device 200 shown.

[0265] Optionally, in this embodiment, when the communication device 60 is a module (such as a chip or chip system) applied to a network device, the memory 203 can be a storage unit within the chip or chip or chip system, such as a register, cache, etc.; it can also be a storage unit located outside the chip or chip system within the network device, such as ROM or other types of static storage devices that can store static information and instructions, such as RAM, etc. This embodiment does not specifically limit this.

[0266] Optionally, in this embodiment of the application, when the communication device 60 is a chip system applied to network equipment, it may be composed of chips or may include chips and other discrete devices. This embodiment of the application does not specifically limit this.

[0267] Because the communication device 60 provided in this embodiment can perform... Figure 4 The communication method provided in the illustrated embodiment can be used as a reference for the technical effects it achieves. Figure 4 The embodiments shown will not be described in detail here.

[0268] It should be noted that one or more of the above modules or units can be implemented by software, hardware, or a combination of both. When any of the above modules or units are implemented by software, the software exists as computer program instructions and is stored in memory. The processor can be used to execute the program instructions and implement the above method flow. The processor can be built into a SoC (System-on-a-Chip) or ASIC, or it can be a separate semiconductor chip. In addition to the core that executes software instructions for computation or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), PLDs (Programmable Logic Devices), or logic circuits that implement dedicated logic operations.

[0269] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, application-specific digital circuit, hardware accelerator, or non-integrated discrete device, which can run the necessary software or perform the above method flow independently of software.

[0270] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0271] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0272] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0273] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers does not imply the order of execution; the execution order of each process should be determined by its function and internal logic. Furthermore, in the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that terms such as "first" and "second" are not necessarily different.

[0274] It should be noted that, in the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner for ease of understanding.

[0275] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0276] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A communication method characterized by comprising: The method is applied to a terminal device, and includes: receiving first downlink control information (DCI) from a network device, the first DCI being used for uplink or downlink data scheduling, wherein a bit number of the first DCI is fixed, the first DCI including a first identifier, the first identifier being used for indicating a format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format, the first DCI having the first DCI format not including indication information of an aperiodic channel state information (CSI) trigger, the first DCI having the second DCI format including the indication information of the aperiodic CSI trigger, the indication information being used for indicating that a terminal device reports an aperiodic CSI measurement result; receiving downlink data from the network device or sending uplink data to the network device according to the first DCI; the bit number of the first DCI is the same as a bit number of a second DCI, wherein the second DCI is used for scheduling transmission of common information, the common information corresponding to terminal devices including first-type terminal devices and second-type terminal devices, wherein common information of the first-type terminal devices is the same as common information of the second-type terminal devices, and the first-type terminal devices and the second-type terminal devices have different capabilities.

2. The method of claim 1, wherein, a size of information bit numbers of at least one information domain in information domains included in the first DCI having the second DCI format is configurable.

3. The method according to claim 1 or 2, characterized in that, bit numbers of each information domain included in the first DCI having the first DCI format are fixed.

4. The method of claim 1, wherein, when the common information is system information, the second DCI includes control information for scheduling a system information block type 1 or other system information, wherein the second DCI is scrambled by a system information radio network temporary identifier (SI-RNTI); alternatively, the common information is a paging message, and the second DCI is scrambled by a paging radio network temporary identifier (P-RNTI); alternatively, the common information is random access response (RAR) information, and the second DCI is scrambled by a random access radio network temporary identifier (RA-RNTI).

5. The method of claim 1, wherein, the bit number of the first DCI is the same as the bit number of the second DCI, including: a sum of bit numbers of all information domains included in the first DCI is the same as a sum of bit numbers of all information domains included in the second DCI; alternatively, an original information bit number of the first DCI is the same as an original information bit number of the second DCI, wherein the original information bit number is a bit number before a cyclic redundancy check (CRC) operation is performed on DCI transmission; alternatively, a bit number of the first DCI before a channel coding operation is performed is the same as a bit number of the second DCI before the channel coding operation is performed; alternatively, a number of modulation symbols corresponding to transmission of the first DCI is the same as a number of modulation symbols corresponding to transmission of the second DCI; alternatively, a bit number corresponding to modulation symbols corresponding to transmission of the first DCI after demodulation is the same as a bit number corresponding to modulation symbols corresponding to transmission of the second DCI after demodulation.

6. The method according to claim 1 or 2, characterized in that, The first DCI with the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

7. The method according to claim 1 or 2, characterized in that, Only DCI formats with the first DCI bit size are configured in a user search space (USS) corresponding to the terminal device.

8. A communication method characterized by comprising: The method is applied to a network device, comprising: determining a first downlink control information (DCI), wherein the first DCI is used for uplink or downlink data scheduling, the bit number of the first DCI is fixed, the first DCI includes a first identifier, the first identifier is used to indicate the format of the first DCI, the format of the first DCI includes a first DCI format or a second DCI format, the first DCI with the first DCI format does not include indication information of aperiodic channel state information (CSI) triggering, the first DCI with the second DCI format includes the indication information of aperiodic CSI triggering, and the indication information is used to indicate that a terminal device reports aperiodic CSI measurement results; sending the first DCI to the terminal device; The bit number of the first DCI is the same as that of a second DCI, wherein the second DCI is used for scheduling common information transmission; the terminal devices corresponding to the common information include first-type terminal devices and second-type terminal devices, wherein the common information of the first-type terminal devices is the same as that of the second-type terminal devices, and the capabilities of the first-type terminal devices are different from those of the second-type terminal devices.

9. The method of claim 8, wherein, The information bit number of at least one information field in the information field included in the first DCI with the second DCI format is configurable.

10. The method according to claim 8 or 9, characterized in that, The bit number of each information field included in the first DCI with the first DCI format is fixed.

11. The method of claim 9, wherein, When the common information is system information, the second DCI includes control information for scheduling a system information block type 1 or other system information, wherein the second DCI is scrambled by a system information radio network temporary identifier (SI-RNTI); Alternatively, the common information is a paging message, and the second DCI is scrambled by a paging radio network temporary identifier (P-RNTI); Alternatively, the common information is random access response (RAR) information, and the second DCI is scrambled by a random access radio network temporary identifier (RA-RNTI).

12. The method of claim 9, wherein, The bit number of the first DCI is the same as that of a second DCI, comprising: The sum of the bit numbers of all information fields included in the first DCI is the same as that of all information fields included in the second DCI; Alternatively, the original information bit number of the first DCI is the same as that of the second DCI, wherein the original information bit number is the bit number before performing a cyclic redundancy check (CRC) operation on DCI transmission. Or, the first DCI has the same number of bits before performing a channel coding operation as the second DCI has before performing a channel coding operation. Or, the first DCI corresponds to the same number of modulation symbols as the second DCI corresponds to for a transmission. Or, the first DCI corresponds to the same number of bits after demodulation as the second DCI corresponds to after demodulation.

13. The method of claim 8 or 9, wherein, The first DCI with the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

14. The method of claim 8 or 9, wherein, Only DCI formats with the first DCI bit size are configured in a user search space (USS) corresponding to the terminal device.

15. A communications device, characterized by The communication device includes a transceiver module; The transceiver module is configured to receive a first DCI (Downlink Control Information) from a network device, wherein the first DCI is used for uplink or downlink data scheduling, the number of bits of the first DCI is fixed, and the first DCI includes a first identifier, wherein the first identifier is used to indicate the format of the first DCI, the format of the first DCI includes a first DCI format or a second DCI format, the first DCI with the first DCI format does not include indication information of an aperiodic channel state information (CSI) trigger, and the first DCI with the second DCI format includes the indication information of the aperiodic CSI trigger, wherein the indication information is used to indicate that the communication device reports an aperiodic CSI measurement result. The transceiver module is further configured to receive downlink data from the network device or send uplink data to the network device according to the first DCI, wherein the number of bits of the first DCI is the same as the number of bits of a second DCI, the second DCI is used to schedule common information transmission, the common information corresponds to a communication device of a first type and a communication device of a second type, the common information of the communication device of the first type is the same as the common information of the communication device of the second type, and the capabilities of the communication device of the first type and the communication device of the second type are different.

16. The communication apparatus according to claim 15, wherein The number of information bits of at least one information field in the information field included in the first DCI with the second DCI format is configurable.

17. The communication apparatus according to claim 15 or 16, wherein, The number of bits of each information field included in the first DCI with the first DCI format is fixed.

18. The communication apparatus according to claim 15, wherein When the common information is system information, the second DCI includes control information for scheduling a system information block type 1 or other system information, and the second DCI is scrambled by a system information radio network temporary identifier (SI-RNTI). Or, the common information is a paging message, and the second DCI is scrambled by a paging radio network temporary identifier (P-RNTI). Or, the common information is random access response RAR information, and the second DCI is scrambled by a random access radio network temporary identifier RA-RNTI.

19. The communication apparatus according to claim 15, wherein The first DCI has the same number of bits as the second DCI. The first DCI has the same total number of bits of all information fields as the second DCI. Or, the first DCI has the same number of original information bits as the second DCI, where the number of original information bits is the number of bits before performing a cyclic redundancy check CRC operation. Or, the first DCI has the same number of bits before performing a channel coding operation as the second DCI. Or, the first DCI has the same number of modulation symbols corresponding to the transmission as the second DCI. Or, the first DCI has the same number of bits corresponding to the modulation symbols after demodulation as the second DCI.

20. The communication apparatus according to claim 15 or 16, wherein, The first DCI with the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, where the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

21. The communication apparatus according to claim 15 or 16, wherein, Only DCI formats with the first DCI bit size are configured in a user search space USS corresponding to the communication device.

22. A communications device, characterized by The communication device includes a processing module and a transceiver module. The processing module is configured to determine a first downlink control information DCI, the first DCI being used for uplink or downlink data scheduling, where the number of bits of the first DCI is fixed, and the first DCI includes a first identifier, the first identifier being used to indicate the format of the first DCI, the format of the first DCI including a first DCI format or a second DCI format, the first DCI with the first DCI format not including indication information of an aperiodic channel state information CSI trigger, and the first DCI with the second DCI format including the indication information of the aperiodic CSI trigger, the indication information being used to indicate a terminal device to report an aperiodic CSI measurement result. The transceiver module is configured to send the first DCI to the terminal device, where the number of bits of the first DCI is the same as the number of bits of a second DCI, the second DCI being used to schedule common information transmission, the common information corresponding to a terminal device including a first type of terminal device and a second type of terminal device, where the common information of the first type of terminal device is the same as the common information of the second type of terminal device, and the first type of terminal device has different capabilities from the second type of terminal device.

23. The communication apparatus according to claim 22, wherein, The first DCI with the second DCI format includes at least one information field with a configurable number of information bits.

24. The communication apparatus according to claim 22 or 23, wherein, The first DCI with the first DCI format includes a fixed size of the number of bits of each information field.

25. The communication apparatus according to claim 22, wherein, When the common information is system information, the second DCI includes control information scheduling a system information block type 1 or other system information, wherein the second DCI is scrambled by a system information radio network temporary identifier SI-RNTI; Or, the common information is a paging message, and the second DCI is scrambled by a paging radio network temporary identifier P-RNTI. Or, the common information is random access response RAR information, and the second DCI is scrambled by a random access radio network temporary identifier RA-RNTI.

26. The communication apparatus according to claim 22, wherein The number of bits of the first DCI is the same as the number of bits of the second DCI, including: The total number of bits of all information fields included in the first DCI is the same as the total number of bits of all information fields included in the second DCI; Or, the original information bit number of the first DCI is the same as the original information bit number of the second DCI, wherein the original information bit number is the number of bits before performing a cyclic redundancy check CRC operation on DCI transmission; Or, the number of bits of the first DCI before performing a channel coding operation is the same as the number of bits of the second DCI before performing a channel coding operation; Or, the number of modulation symbols corresponding to the transmission of the first DCI is the same as the number of modulation symbols corresponding to the transmission of the second DCI; Or, the number of bits corresponding to the modulation symbols corresponding to the transmission of the first DCI after demodulation is the same as the number of bits corresponding to the modulation symbols corresponding to the transmission of the second DCI after demodulation.

27. The communication apparatus according to claim 22 or 23, wherein, The first DCI with the second DCI format includes an information field for a first data transmission function and an information field for a second data transmission function, wherein the first data transmission function indicates a basic function for data transmission scheduling, and the second data transmission function indicates an additional function for data transmission scheduling.

28. The communication apparatus according to claim 22 or 23, wherein, Only DCI formats with the first DCI bit size are configured in a user search space USS corresponding to the terminal device.

29. A communications device, characterized by The communication device includes a processor and a communication interface, the communication interface is used for communication with other communication devices; the processor is used to run a set of programs to enable the communication device to perform the method of any one of claims 1-7 or any one of claims 8-14.

30. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, when the computer instructions are executed by a computer, the computer executes the method of any one of claims 1-7 or any one of claims 8-14.

31. A computer program product, characterised in that, The computer program product includes instructions, when the computer program product is run on a computer, the computer executes the method of any one of claims 1-7 or any one of claims 8-14.

32. A chip, comprising: The communication device includes a processor and an interface, the processor is coupled to a memory through the interface, when the processor executes a computer program or instructions in the memory, the method of any one of claims 1-7 or any one of claims 8-14 is executed.

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