Information sending and receiving method, device and system

Abstract

The embodiment of the invention provides an information sending and receiving method, device and system, relates to the field of communication, and can reduce the resource overhead of reporting capability parameters by (low-capability) terminal equipment. The method comprises: a terminal device sends first information to a network device, the first information being used for indicating that the terminal device belongs to a first type of terminal device; the capability parameter corresponding to the first type of terminal equipment comprises a first capability set, and the first capability set comprises a channel bandwidth supported by the terminal equipment and the number of transmitting antennas of the terminal equipment; wherein the channel bandwidth of the terminal equipment is less than 100 MHz, and the number of transmitting antennas of the terminal equipment is less than 4. The embodiment of the invention is applied to a large-scale machine communication (mMTC) service scene or other service scenes of 5G NR.

Description

[0001] This application is a divisional application. The application number of the original application is 202010791135.X, and the original application date is August 7, 2020. The entire contents of the original application are incorporated by reference into this application. The original application (application number 202010791135.X) claims the priority of the Chinese patent application filed with the State Intellectual Property Office on May 15, 2020, with application number 202010415293.5 and application name “A method, device and system for sending and receiving information”, and the entire contents are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a method, device and system for sending and receiving information. Background Art

[0003] New radio (NR) is a global fifth generation (5G) mobile communication technology standard based on a new air interface design of orthogonal frequency division multiplexing (OFDM), and is also the foundation of the next generation of cellular mobile technology. NR involves a wide variety of services, such as enhanced mobile broadband (eMBB) services, ultra-reliability low latency communication (URLLC) services, and massive machine type communication (mMTC) services / machine type communication (MTC) services. Among them, mMTC / MTC services can include services in industrial wireless sensor network (IWSN) scenarios, services in video surveillance scenarios, and services in wearable / smart wearables scenarios.

[0004] Currently, the 3rd generation partnership project (3GPP) has initiated research on reduced capability (REDCAP) terminal devices under the NR system, aiming to design a terminal device that meets the performance requirements of the IoT market and has low cost / low implementation complexity, such as the IWSN, video surveillance, and wearable scenarios mentioned above, in order to expand the application of the NR system in the IoT market.

[0005] For REDCAP terminal devices, how to report relevant parameters has not yet been defined by the standard. Summary of the invention

[0006] The embodiments of the present application provide a method, device and system for sending and receiving information, which can reduce the resource overhead of (low-capability) terminal devices reporting capability parameters.

[0007] In a first aspect, an embodiment of the present application provides an information sending method, including: a terminal device sends first information to a network device, the first information is used to indicate that the terminal device belongs to a first type of terminal device; capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 megahertz (MHz), and the number of transmitting antennas of the terminal device is less than 4.

[0008] Based on the method provided in the embodiment of the present application, the terminal device can report its own device type to the network device through the first information, so that the network device can determine multiple capability parameters corresponding to the terminal device according to the type of the terminal device, thereby reducing the resource overhead used by the terminal device to report the capability parameters.

[0009] In a possible implementation, the channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1, and the number of receiving antennas of the terminal device is 2.

[0010] In a possible implementation, the first capability set also includes at least one of the number of hybrid automatic repeat request (HARQ) processes supported by the terminal device, the maximum modulation mode of uplink data transmission, the maximum modulation mode of downlink data transmission, the physical downlink shared channel (PDSCH) processing capability or the physical uplink shared channel (PUSCH) processing capability; wherein the PDSCH processing capability corresponds to the first time offset between the PDSCH and the physical uplink control channel (PUCCH); and the PUSCH processing capability corresponds to the second time offset between the PDCCH and the physical uplink shared channel (PUSCH). wherein the number of HARQ processes is less than or equal to 16, for example, 8, the maximum modulation mode of uplink data transmission is 64 quadrature amplitude modulation (QAM), the maximum modulation mode of downlink data transmission is 64QAM, the first time offset is greater than or equal to a first preset threshold, and the second time offset is greater than or equal to a second preset threshold.

[0011] In a possible implementation, the capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, the second capability set is used to characterize the power saving capability of the terminal device; a third capability set, the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, the fourth capability set is used to characterize the short-delay processing capability of the terminal device; a fifth capability set, the fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device; a sixth capability set, the sixth capability set is used to characterize the transmission reliability capability of the terminal device; a seventh capability set, the seventh capability set is used to characterize the ultra-reliable low latency communication (URLLC) data transmission capability of the terminal device. The embodiment of the present application can define the capability set of the first type of terminal device according to different data transmission requirements, and can meet different scenarios with different requirements for energy saving, coverage, and data transmission rate.

[0012] Based on the method provided in the embodiment of the present application, the terminal device reports through the first information that it belongs to the first type of terminal device. The capability parameters corresponding to the first type of terminal device include channel bandwidth and the number of antennas. The number of antennas can be the number of transmitting antennas or the number of receiving antennas, or the sum of the two. In addition, the capability parameters corresponding to the first type of terminal device can also include one or more of the second capability set to the seventh capability set. The network device determines that the terminal device is the first type of terminal device through the first information, thereby being able to determine the bandwidth, antenna and other capability parameters of the terminal device, such as power saving capability, further improving the efficiency of the terminal device in reporting capability parameters and saving resource overhead for reporting capability parameters.

[0013] In a possible implementation, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set. The first information may explicitly indicate (directly indicate) or implicitly indicate (indirectly indicate) the first capability set, which is not limited in this application.

[0014] In a possible implementation, the method further includes: the terminal device sends a second information to the network device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set. That is, the first information only indicates the first capability set, and the second information indicates at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. It can be considered that the first capability set indicated by the first information is a mandatory capability set, and the other capability sets are independently implemented by each terminal manufacturer, and therefore reported through the second information. The capability set indicated by the second information can be an optional capability set, or a mandatory capability set.

[0015] In a possible implementation manner, the first information is sent in an initial access phase, and the second information is sent in a connected state.

[0016] In a possible implementation, the method further includes: the terminal device sends third information to the network device; the third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. In this way, the first type of terminal device can be associated with different capability sets by reporting its own application scenario, assisting the network device to achieve adaptive data transmission, and meeting the needs of different application scenarios.

[0017] In a possible implementation manner, when the application scenario of the terminal device is an industrial wireless sensor network IWSN scenario, the application scenario of the terminal device is associated with the second capability set, the fourth capability set, and the seventh capability set.

[0018] In one possible implementation, the second capability set includes at least one of the following: the maximum number of downlink control information (DCI) of different sizes supported by the terminal device, the terminal device supports cross-slot scheduling, the terminal device supports receiving wake-up signals (WUS), or the terminal device supports neighboring cell radio resource management (RRM) measurement relaxation; wherein the maximum number of DCIs is less than 4.

[0019] In one possible implementation, the third capability set includes at least one of the following: the terminal device supports supplementary uplink (SUL), the terminal device supports repeated transmission of the physical downlink control channel PDCCH, the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 orthogonal frequency division multiplexing OFDM symbols, the terminal device supports virtual carriers, or the terminal device supports bandwidth part (BWP) switching delay not greater than the RF retuning time.

[0020] In one possible implementation, the fourth capability set includes at least one of the following: the terminal device supports uplink data transmission based on mini-time slots, the terminal device supports downlink data transmission based on mini-time slots, the terminal device supports unauthorized uplink data transmission, or the terminal device supports unauthorized downlink data transmission.

[0021] In a possible implementation, the fifth capability set includes at least one of the following: the terminal device supports a two-step random access transmission mode, the terminal device supports an early data transmission mode, or the terminal device supports a pre-configured uplink resource transmission mode.

[0022] In one possible implementation, the sixth capability set includes at least one of the following: the terminal device supports a data transmission method based on a single PDCCH to receive multiple transmission reception points (transmission reception point, TRP), the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 OFDM symbols, the terminal device supports repeated transmission of PUSCH, or the terminal device supports repeated transmission of (physical downlink shared channel, PDSCH).

[0023] In one possible implementation, the seventh capability set includes at least one of the following: the terminal device supports unauthorized uplink data transmission, the terminal device supports unauthorized downlink data transmission, the terminal device supports PUSCH / PDSCH transmission based on micro-slots, the terminal device supports physical uplink control channel PUCCH format 0 / 2 transmission, the terminal device supports PDSCH / PUSCH repeated transmission, the terminal device supports PDCCH transmission with an aggregation level of 16, or the terminal device supports a modulation coding scheme cell radio network temporary indentifier (MCS-C-RNTI) table corresponding to a block error rate (BLER) of 1e-5.

[0024] In a possible implementation, the capability parameters corresponding to the terminal device also include at least one of the following: a capability set for an IWSN scenario; a capability set for a wearable scenario; and a capability set for a video surveillance scenario.

[0025] Based on the method provided in the embodiment of the present application, capability parameters can also be divided according to application scenarios, that is, the first type of terminal device corresponds to a capability set with different capability parameters in different application scenarios, thereby improving the flexibility of the terminal in reporting capability parameters.

[0026] In one possible implementation, the capability set for the IWSN scenario includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross-time slot scheduling, the terminal device supports uplink data transmission based on micro-time slots, the terminal device supports downlink data transmission based on micro-time slots, the terminal device supports unlicensed uplink data transmission, the terminal device supports unlicensed downlink data transmission, the terminal device supports two-step random access transmission mode, the terminal device supports EDT transmission mode, or the terminal device supports PUR transmission mode.

[0027] In a possible implementation, the capability parameters corresponding to the terminal device also include a capability set corresponding to uplink transmission.

[0028] In one possible implementation, the terminal device also includes at least one of the following capabilities: the terminal device supports separated public signaling data transmission, the terminal device supports high-precision synchronization function, the terminal device supports network slicing data transmission, the terminal device supports non-public network (NPN) data transmission, the terminal device supports the fifth generation local area network 5G (local area network, LAN) data transmission, the terminal device supports uplink time difference of arrival (uplink timedifference of arrival, UTDOA) positioning or the terminal device supports multicast / broadcast data transmission.

[0029] In a possible implementation, the method further includes: the terminal device sends fourth information to the network device, the fourth information indicates the first parameter f1, the maximum downlink data rate of the terminal device corresponding to f1 is less than or equal to X megabits per second, and X is 10.

[0030] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM or 16QAM, and the maximum modulation mode of downlink data transmission is 64QAM. In the frequency division duplex FDD band, the value range of f1 is 0.062 to 0.10; or in the time division duplex TDD band, the value range of f1 is 0.088 to 0.10.

[0031] In a possible implementation manner, the terminal device sending the fourth information to the network device includes: the terminal device reporting at least one fourth information corresponding to the at least one frequency band supported by the terminal device.

[0032] In a possible implementation, the method further includes: the terminal device sends fifth information to the network device, the fifth information indicates a second parameter f2, the maximum uplink data rate of the terminal device corresponding to f2 is not higher than Y megabits / second, and Y is 5.

[0033] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 1 or 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM, the maximum modulation mode of downlink data transmission is 64QAM, and in the FDD frequency band, the value range of f2 is 0.058 to 0.10; or in the TDD frequency band, the value range of f2 is 0.191 to 0.20 or 0.29 to 0.30 or 0.191 to 0.30.

[0034] In a possible implementation manner, the terminal device sending the fifth information to the network device includes: the terminal device reporting at least one fifth information corresponding to the at least one frequency band supported by the terminal device.

[0035] In a second aspect, an embodiment of the present application provides an information receiving method, including: a network device receives first information from a terminal device, the first information is used to indicate that the terminal device belongs to a first type of terminal device; capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

[0036] In a possible implementation, the channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1, and the number of receiving antennas of the terminal device is 2.

[0037] In one possible implementation, the first capability set also includes at least one of the number of hybrid automatic repeat request HARQ processes supported by the terminal device, the maximum modulation mode of uplink data transmission, the maximum modulation mode of downlink data transmission, the physical downlink shared channel PDSCH processing capability, or the physical uplink shared channel PUSCH processing capability; wherein, the number of HARQ processes is less than or equal to 16, the maximum modulation mode of uplink data transmission is 64 quadrature amplitude modulation QAM, and the maximum modulation mode of downlink data transmission is 64QAM.

[0038] In one possible implementation, the capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, the second capability set is used to characterize the power saving capability of the terminal device; a third capability set, the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, the fourth capability set is used to characterize the short-delay processing capability of the terminal device; a fifth capability set, the fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device; a sixth capability set, the sixth capability set is used to characterize the transmission reliability capability of the terminal device; and a seventh capability set, the seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

[0039] In one possible implementation, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set.

[0040] In a possible implementation, the method also includes: the network device receives second information from the terminal device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set or a seventh capability set.

[0041] In a possible implementation manner, the first information is sent in an initial access phase, and the second information is sent in a connected state.

[0042] In a possible implementation, the method also includes: the network device receives third information from the terminal device; the third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

[0043] In a possible implementation, when the application scenario of the terminal device is an industrial wireless sensor network IWSN scenario, the application scenario of the terminal device is associated with the second capability set, the fourth capability set, the fifth capability set, and the seventh capability set.

[0044] In one possible implementation, the second capability set includes at least one of the following: the maximum number of DCIs of different downlink control information DCI sizes supported by the terminal device, the terminal device supports cross-slot scheduling, the terminal device supports receiving wake-up signals WUS, or the terminal device supports neighboring cell radio resource management RRM measurement relaxation; wherein the maximum number of DCIs is less than 4.

[0045] In one possible implementation, the third capability set includes at least one of the following: the terminal device supports supplementary uplink (SUL), the terminal device supports repeated transmission of the physical downlink control channel PDCCH, the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 orthogonal frequency division multiplexing OFDM symbols, the terminal device supports virtual carriers, or the terminal device supports bandwidth part (BWP) switching delay not greater than the RF retuning time.

[0046] In one possible implementation, the fourth capability set includes at least one of the following: the terminal device supports uplink data transmission based on mini-time slots, the terminal device supports downlink data transmission based on mini-time slots, the terminal device supports unauthorized uplink data transmission, or the terminal device supports unauthorized downlink data transmission.

[0047] In a possible implementation, the fifth capability set includes at least one of the following: the terminal device supports a two-step random access transmission mode, the terminal device supports an early data transmission mode, or the terminal device supports a pre-configured uplink resource transmission mode.

[0048] In one possible implementation, the sixth capability set includes at least one of the following: the terminal device supports a data transmission method based on a single PDCCH to receive multiple transmission receiving points TRP, the terminal device supports the time domain resources corresponding to the PDCCH being greater than 3 OFDM symbols, the terminal device supports repeated transmission of PUSCH, or the terminal device supports repeated transmission of PDSCH.

[0049] In one possible implementation, the seventh capability set includes at least one of the following: the terminal device supports unauthorized uplink data transmission, the terminal device supports unauthorized downlink data transmission, the terminal device supports PUSCH / PDSCH transmission based on micro-slots, the terminal device supports physical uplink control channel PUCCH format 0 / 2 transmission, the terminal device supports PDSCH / PUSCH repeated transmission, the terminal device supports PDCCH transmission with aggregation level 16, or the terminal device supports MCS-C-RNTI table corresponding to block error rate BLER of 1e-5.

[0050] In a possible implementation, the capability parameters corresponding to the terminal device also include at least one of the following: a capability set for an IWSN scenario; a capability set for a wearable scenario; and a capability set for a video surveillance scenario.

[0051] In one possible implementation, the capability set for the IWSN scenario includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross-time slot scheduling, the terminal device supports uplink data transmission based on micro-time slots, the terminal device supports downlink data transmission based on micro-time slots, the terminal device supports unlicensed uplink data transmission, the terminal device supports unlicensed downlink data transmission, the terminal device supports two-step random access transmission mode, the terminal device supports EDT transmission mode, or the terminal device supports PUR transmission mode.

[0052] In a possible implementation, the capability parameters corresponding to the terminal device also include a capability set corresponding to uplink transmission.

[0053] In one possible implementation, the terminal device also includes at least one of the following capabilities: the terminal device supports separated public signaling data transmission, the terminal device supports high-precision synchronization function, the terminal device supports network slicing data transmission, the terminal device supports non-public network NPN data transmission, the terminal device supports 5G LAN data transmission, the terminal device supports uplink arrival time difference UTDOA positioning, or the terminal device supports multicast / broadcast data transmission.

[0054] In a possible implementation, the method further includes: the network device receives fourth information from the terminal device, the fourth information indicates the first parameter f1, and the maximum downlink data rate of the terminal device corresponding to f1 is less than or equal to X megabits per second, where X is 10.

[0055] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM or 16QAM, and the maximum modulation mode of downlink data transmission is 64QAM. In the frequency division duplex FDD band, the value range of f1 is 0.062 to 0.10; or in the time division duplex TDD band, the value range of f1 is 0.088 to 0.10.

[0056] In a possible implementation manner, the network device receiving the fourth information from the terminal device includes: the network device receiving, from the terminal device, at least one fourth information corresponding to at least one frequency band supported by the terminal device.

[0057] In a possible implementation, the method further includes: the network device receives fifth information from the terminal device, the fifth information indicates a second parameter f2, the maximum uplink data rate of the terminal device corresponding to f2 is not higher than Y megabits per second, and Y is 5.

[0058] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 1 or 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM, the maximum modulation mode of downlink data transmission is 64QAM, and in the FDD frequency band, the value range of f2 is 0.058 to 0.10; or in the TDD frequency band, the value range of f2 is 0.191 to 0.20 or 0.29 to 0.30 or 0.191 to 0.30.

[0059] In a possible implementation manner, the network device receiving the fifth information from the terminal device includes: the network device receiving, from the terminal device, at least one fifth information corresponding to at least one frequency band supported by the terminal device.

[0060] In the third aspect, an embodiment of the present application provides a communication device, which can be a terminal device, including: a transceiver unit, used to send first information to a network device, the first information is used to indicate that the terminal device belongs to a first type of terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

[0061] In a possible implementation, the channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1, and the number of receiving antennas of the terminal device is 2.

[0062] In one possible implementation, the first capability set also includes at least one of the number of hybrid automatic repeat request HARQ processes supported by the terminal device, the maximum modulation mode of uplink data transmission, the maximum modulation mode of downlink data transmission, the physical downlink shared channel PDSCH processing capability, or the physical uplink shared channel PUSCH processing capability; wherein, the number of HARQ processes is less than or equal to 16, the maximum modulation mode of uplink data transmission is 64 quadrature amplitude modulation QAM, and the maximum modulation mode of downlink data transmission is 64QAM.

[0063] In one possible implementation, the capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, the second capability set is used to characterize the power saving capability of the terminal device; a third capability set, the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, the fourth capability set is used to characterize the short-delay processing capability of the terminal device; a fifth capability set, the fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device; a sixth capability set, the sixth capability set is used to characterize the transmission reliability capability of the terminal device; and a seventh capability set, the seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

[0064] In one possible implementation, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set.

[0065] In one possible implementation, the transceiver unit is also used to: send second information to the network device, the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

[0066] In a possible implementation manner, the first information is sent in an initial access phase, and the second information is sent in a connected state.

[0067] In one possible implementation, the transceiver unit is also used to: send third information to the network device; the third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

[0068] In a possible implementation manner, when the application scenario of the terminal device is an industrial wireless sensor network IWSN scenario, the application scenario of the terminal device is associated with the second capability set, the fourth capability set, and the seventh capability set.

[0069] In one possible implementation, the second capability set includes at least one of the following: the maximum number of DCIs of different downlink control information DCI sizes supported by the terminal device, the terminal device supports cross-slot scheduling, the terminal device supports receiving wake-up signals WUS, or the terminal device supports neighboring cell radio resource management RRM measurement relaxation; wherein the maximum number of DCIs is less than 4.

[0070] In one possible implementation, the third capability set includes at least one of the following: the terminal device supports supplementary uplink (SUL), the terminal device supports repeated transmission of the physical downlink control channel PDCCH, the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 orthogonal frequency division multiplexing OFDM symbols, the terminal device supports virtual carriers, or the terminal device supports bandwidth part (BWP) switching delay not greater than the RF retuning time.

[0071] In one possible implementation, the fourth capability set includes at least one of the following: the terminal device supports uplink data transmission based on mini-time slots, the terminal device supports downlink data transmission based on mini-time slots, the terminal device supports unauthorized uplink data transmission, or the terminal device supports unauthorized downlink data transmission.

[0072] In a possible implementation, the fifth capability set includes at least one of the following: the terminal device supports a two-step random access transmission mode, the terminal device supports an early data transmission mode, or the terminal device supports a pre-configured uplink resource transmission mode.

[0073] In one possible implementation, the sixth capability set includes at least one of the following: the terminal device supports a data transmission method based on a single PDCCH to receive multiple transmission receiving points TRP, the terminal device supports the time domain resources corresponding to the PDCCH being greater than 3 OFDM symbols, the terminal device supports repeated transmission of PUSCH, or the terminal device supports repeated transmission of PDSCH.

[0074] In one possible implementation, the seventh capability set includes at least one of the following: the terminal device supports unauthorized uplink data transmission, the terminal device supports unauthorized downlink data transmission, the terminal device supports PUSCH / PDSCH transmission based on micro-slots, the terminal device supports physical uplink control channel PUCCH format 0 / 2 transmission, the terminal device supports PDSCH / PUSCH repeated transmission, the terminal device supports PDCCH transmission with aggregation level 16, or the terminal device supports MCS-C-RNTI table corresponding to block error rate BLER of 1e-5.

[0075] In a possible implementation, the capability parameters corresponding to the terminal device also include at least one of the following: a capability set for an IWSN scenario; a capability set for a wearable scenario; and a capability set for a video surveillance scenario.

[0076] In one possible implementation, the capability set for the IWSN scenario includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross-time slot scheduling, the terminal device supports uplink data transmission based on micro-time slots, the terminal device supports downlink data transmission based on micro-time slots, the terminal device supports unlicensed uplink data transmission, the terminal device supports unlicensed downlink data transmission, the terminal device supports two-step random access transmission mode, the terminal device supports EDT transmission mode, or the terminal device supports PUR transmission mode.

[0077] In a possible implementation, the capability parameters corresponding to the terminal device also include a capability set corresponding to uplink transmission.

[0078] In one possible implementation, the terminal device also includes at least one of the following capabilities: the terminal device supports separated public signaling data transmission, the terminal device supports high-precision synchronization function, the terminal device supports network slicing data transmission, the terminal device supports non-public network NPN data transmission, the terminal device supports 5G LAN data transmission, the terminal device supports uplink arrival time difference UTDOA positioning, or the terminal device supports multicast / broadcast data transmission.

[0079] In a possible implementation, the transceiver unit is further used to: send fourth information to the network device, where the fourth information indicates the first parameter f1, and the maximum downlink data rate of the terminal device corresponding to f1 is less than or equal to X megabits per second, where X is 10.

[0080] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM or 16QAM, and the maximum modulation mode of downlink data transmission is 64QAM. In the frequency division duplex FDD band, the value range of f1 is 0.062 to 0.10; or in the time division duplex TDD band, the value range of f1 is 0.088 to 0.10.

[0081] In a possible implementation manner, the transceiver unit is further configured to: report the fourth information in different frequency bands respectively.

[0082] In a possible implementation, the transceiver unit is further used to: send fifth information to the network device, the fifth information indicating the second parameter f2, the maximum uplink data rate of the terminal device corresponding to f2 is not higher than Y megabits / second, and Y is 5.

[0083] In one possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 1 or 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM, and the maximum modulation mode of downlink data transmission is 64QAM. In the FDD frequency band, the value range of f2 is 0.058 to 0.10; or in the TDD frequency band, the value range of f2 is 0.191 to 0.20 or 0.29 to 0.30 or 0.191 to 0.30.

[0084] In a possible implementation, the transceiver unit is further used to: report at least one fifth information corresponding to at least one frequency band supported by the terminal device.

[0085] In a fourth aspect, an embodiment of the present application provides a communication device, which may be a network device, comprising: a transceiver unit, used to receive first information from a terminal device, the first information being used to indicate that the terminal device belongs to a first type of terminal device; capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set including a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

[0086] In a possible implementation, the channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1, and the number of receiving antennas of the terminal device is 2.

[0087] In one possible implementation, the first capability set also includes at least one of the number of hybrid automatic repeat request HARQ processes supported by the terminal device, the maximum modulation mode of uplink data transmission, the maximum modulation mode of downlink data transmission, the physical downlink shared channel PDSCH processing capability, or the physical uplink shared channel PUSCH processing capability; wherein, the number of HARQ processes is less than or equal to 16, the maximum modulation mode of uplink data transmission is 64 quadrature amplitude modulation QAM, and the maximum modulation mode of downlink data transmission is 64QAM.

[0088] In one possible implementation, the capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, the second capability set is used to characterize the power saving capability of the terminal device; a third capability set, the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, the fourth capability set is used to characterize the short-delay processing capability of the terminal device; a fifth capability set, the fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device; a sixth capability set, the sixth capability set is used to characterize the transmission reliability capability of the terminal device; and a seventh capability set, the seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

[0089] In one possible implementation, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set.

[0090] In one possible implementation, the transceiver unit is also used to: receive second information from the terminal device, the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

[0091] In a possible implementation manner, the first information is sent in an initial access phase, and the second information is sent in a connected state.

[0092] In one possible implementation, the transceiver unit is also used to: receive third information from the terminal device; the third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

[0093] In a possible implementation, when the application scenario of the terminal device is an industrial wireless sensor network IWSN scenario, the application scenario of the terminal device is associated with the second capability set, the fourth capability set, the fifth capability set, and the seventh capability set.

[0094] In one possible implementation, the second capability set includes at least one of the following: the maximum number of DCIs of different downlink control information DCI sizes supported by the terminal device, the terminal device supports cross-slot scheduling, the terminal device supports receiving wake-up signals WUS, or the terminal device supports neighboring cell radio resource management RRM measurement relaxation; wherein the maximum number of DCIs is less than 4.

[0095] In one possible implementation, the third capability set includes at least one of the following: the terminal device supports supplementary uplink (SUL), the terminal device supports repeated transmission of the physical downlink control channel PDCCH, the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 orthogonal frequency division multiplexing OFDM symbols, the terminal device supports virtual carriers, or the terminal device supports bandwidth part (BWP) switching delay not greater than the RF retuning time.

[0096] In one possible implementation, the fourth capability set includes at least one of the following: the terminal device supports uplink data transmission based on mini-time slots, the terminal device supports downlink data transmission based on mini-time slots, the terminal device supports unauthorized uplink data transmission, or the terminal device supports unauthorized downlink data transmission.

[0097] In a possible implementation, the fifth capability set includes at least one of the following: the terminal device supports a two-step random access transmission mode, the terminal device supports an early data transmission mode, or the terminal device supports a pre-configured uplink resource transmission mode.

[0098] In one possible implementation, the sixth capability set includes at least one of the following: the terminal device supports a data transmission method based on a single PDCCH to receive multiple transmission receiving points TRP, the terminal device supports the time domain resources corresponding to the PDCCH being greater than 3 OFDM symbols, the terminal device supports repeated transmission of PUSCH, or the terminal device supports repeated transmission of PDSCH.

[0099] In one possible implementation, the seventh capability set includes at least one of the following: the terminal device supports unauthorized uplink data transmission, the terminal device supports unauthorized downlink data transmission, the terminal device supports PUSCH / PDSCH transmission based on micro-slots, the terminal device supports physical uplink control channel PUCCH format 0 / 2 transmission, the terminal device supports PDSCH / PUSCH repeated transmission, the terminal device supports PDCCH transmission with aggregation level 16, or the terminal device supports MCS-C-RNTI table corresponding to block error rate BLER of 1e-5.

[0100] In a possible implementation, the capability parameters corresponding to the terminal device also include at least one of the following: a capability set for an IWSN scenario; a capability set for a wearable scenario; and a capability set for a video surveillance scenario.

[0101] In one possible implementation, the capability set for the IWSN scenario includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross-time slot scheduling, the terminal device supports uplink data transmission based on micro-time slots, the terminal device supports downlink data transmission based on micro-time slots, the terminal device supports unlicensed uplink data transmission, the terminal device supports unlicensed downlink data transmission, the terminal device supports two-step random access transmission mode, the terminal device supports EDT transmission mode, or the terminal device supports PUR transmission mode.

[0102] In a possible implementation, the capability parameters corresponding to the terminal device also include a capability set corresponding to uplink transmission.

[0103] In one possible implementation, the terminal device also includes at least one of the following capabilities: the terminal device supports separated public signaling data transmission, the terminal device supports high-precision synchronization function, the terminal device supports network slicing data transmission, the terminal device supports non-public network NPN data transmission, the terminal device supports 5G LAN data transmission, the terminal device supports uplink arrival time difference UTDOA positioning, or the terminal device supports multicast / broadcast data transmission.

[0104] In a possible implementation, the transceiver unit is further used to: receive fourth information from the terminal device, where the fourth information indicates the first parameter f1, and the maximum downlink data rate of the terminal device corresponding to f1 is less than or equal to X megabits per second, where X is 10.

[0105] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM or 16QAM, and the maximum modulation mode of downlink data transmission is 64QAM. In the frequency division duplex FDD band, the value range of f1 is 0.062 to 0.10; or in the time division duplex TDD band, the value range of f1 is 0.088 to 0.10.

[0106] In a possible implementation manner, the transceiver unit is further used to: receive, from the terminal device, at least one fourth information corresponding to at least one frequency band supported by the terminal device.

[0107] In a possible implementation, the transceiver unit is further used to: receive fifth information from the terminal device, the fifth information indicating a second parameter f2, the maximum uplink data rate of the terminal device corresponding to f2 is not higher than Y megabits per second, and Y is 5.

[0108] In a possible implementation, the number of transmitting antennas of the terminal device is 1, the number of receiving antennas is 1 or 2, the channel bandwidth is 20 MHz, the maximum modulation mode of uplink data transmission is 64QAM, the maximum modulation mode of downlink data transmission is 64QAM, and in the FDD frequency band, the value range of f2 is 0.058 to 0.10; or in the TDD frequency band, the value range of f2 is 0.191 to 0.20 or 0.29 to 0.30 or 0.191 to 0.30.

[0109] In a possible implementation manner, the transceiver unit is further used to: receive, from the terminal device, at least one fifth information corresponding to at least one frequency band supported by the terminal device.

[0110] In a fifth aspect, a communication device is provided, which may be a terminal device, comprising: a processor and a memory; the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory so that the device performs a method as described in any one of the above-mentioned first aspects.

[0111] In a sixth aspect, a communication device is provided, which may be a network device, comprising: a processor; the processor is used to couple with a memory, and after reading instructions in the memory, execute any method in the second aspect according to the instructions.

[0112] In a seventh aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer can execute any one of the methods in any one of the above aspects.

[0113] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any of the methods in any of the above aspects.

[0114] In a ninth aspect, a circuit system is provided, the circuit system comprising a processing circuit, and the processing circuit is configured to execute any method as in any of the above aspects.

[0115] In a tenth aspect, a chip is provided, comprising a processor, wherein the processor is coupled to a memory, wherein the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, any method in any of the above aspects is implemented.

[0116] In an eleventh aspect, a communication system is provided, which includes a communication device according to any one of the third aspect and any one of the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0117] Figure 1 A schematic diagram of a communication system architecture provided in an embodiment of the present application;

[0118] Figure 2 A schematic diagram of another communication system architecture provided in an embodiment of the present application;

[0119] Figure 3 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0120] Figure 4 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0121] Figure 5 A signal interaction diagram applicable to a method for sending and receiving information provided in an embodiment of the present application;

[0122] Figure 6 A schematic diagram for comparing different data transmission structures provided in an embodiment of the present application;

[0123] Figure 7 A schematic diagram of the structure of another terminal device provided in an embodiment of the present application;

[0124] Figure 8 A schematic diagram of the structure of another network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0125] In order to make the description of the following embodiments clear and concise, a brief introduction to the relevant concepts or technologies is first given:

[0126] Currently, 3GPP has initiated research on REDCAP terminal devices under the NR system, aiming to design a terminal device that meets the performance requirements of the IoT market and has low cost / low implementation complexity, targeting the growing IoT market, such as IWSN, video surveillance, and wearable scenarios, so as to expand the application of the NR system in the IoT market.

[0127] For the above-mentioned IWSN scenarios, video surveillance scenarios and wearable scenarios, they have different requirements (requirements) for data transmission performance such as data transmission rate, data transmission delay, data transmission reliability and power consumption. For example, in terms of the battery life requirements (power consumption requirements) of video surveillance scenarios and wearable scenarios, the video surveillance scenario has no clear requirements for battery life, that is, in the video surveillance scenario, the data transmission between the NR REDCAP terminal device and the network device does not need to consider the impact of the power consumption of the NR REDCAP terminal device. The wearable scenario has relatively strict requirements for battery life to avoid frequent charging affecting the user experience. That is, the NR REDCAP terminal devices used in wearable scenarios need to consider how to reduce power consumption. For another example, taking the IWSN scenario and the wearable scenario as examples, in the IWSN scenario, the terminal device can be a wireless sensor. Since most IWSN scenarios are indoor scenarios, their transmission distance is short, which can basically guarantee the coverage transmission requirements. In the wearable scenario, the terminal device can be a wearable device (for example, a smart watch). The wearable device has a larger range of movement with the user, and often has a clearer requirement for coverage performance. As shown in Table 1, some requirements for data transmission performance such as data transmission rate, data transmission delay, data transmission reliability and power consumption are shown for IWSN scenarios, video surveillance scenarios and wearable scenarios respectively.

[0128] Table 1

[0129]

[0130]

[0131] Since different application scenarios have different requirements for data transmission rate, data transmission delay, data transmission reliability and battery life. Therefore, the transmission characteristics of NR REDCAP terminal devices in different application scenarios may be different. For example, some NR REDCAP terminal devices mainly need to meet the needs of the IWSN market, while other NR REDCAP terminal devices mainly need to meet the needs of the wearable market. For NR REDCAP terminal devices that need to meet the needs of the IWSN market, the data transmission capabilities that meet the low data transmission rate and reduce the power consumption of the terminal device can be mainly considered; while for NR REDCAP terminal devices that need to meet the needs of the wearable market, the data transmission capabilities that meet the high data transmission rate and reduce the power consumption of the terminal device can be mainly considered.

[0132] Based on the above reasons, how to define the capability parameters of REDCAP terminal devices and how to design the method for REDCAP terminal devices to report capability parameters to meet the requirements of different application scenarios has become an urgent problem to be solved.

[0133] In the related art, the capabilities of the terminal device can be defined according to the characteristics associated with the data transmission steps (for details, please refer to the protocol TS38.822). The terminal device can enable the network device to obtain the capabilities of the terminal device by reporting a feature list. Among them, the capabilities of the terminal device include mandatory capabilities and optional capabilities. Mandatory capabilities are capabilities that the terminal device must have, and optional capabilities do not make rigid requirements for the terminal device. For example, the mandatory capabilities of the terminal device may include the capabilities of the terminal device in terms of data transmission waveform, modulation mode, subcarrier spacing (SCS) and cyclic prefix (CP). Taking waveform as an example, the protocol stipulates that for downlink data transmission, the terminal device must support the data transmission waveform based on cyclic prefix orthogonal frequency division multiplexing (CP-OFDM), and for uplink data transmission, the terminal device must support the data transmission waveform based on CP-OFDM and discrete Fourier transform spread OFDM (orthogonal frequency division multiplexing), DFT-S-OFDM. For another example, the relevant technology also stipulates the mandatory and optional capabilities of the terminal device during initial access and mobility, the mandatory and optional capabilities of the terminal device when realizing data transmission through multiple input multiple output (MIMO), the mandatory and optional capabilities of the terminal device in downlink control channel reception and uplink control channel transmission, and the mandatory and optional capabilities of the terminal device in scheduling / HARQ processing.

[0134] However, defining the capabilities of terminal devices separately through the features associated with the data transmission steps cannot be directly associated with different data transmission requirements in different application scenarios. For example, for IWSN scenarios, video surveillance scenarios, and wearable scenarios, there are different requirements in terms of energy saving, coverage, and data transmission rate. If based on the above technology, it is necessary to define the capability features associated with different application scenarios in each data transmission step separately, and the capability feature design is fragmented and complex. In addition, the method of reporting the capabilities of terminal devices by reporting feature lists consumes a lot of signaling.

[0135] The embodiment of the present application provides an information sending method, where a terminal device can send first information to a network device, where the first information is used to indicate that the terminal device belongs to a first type of terminal device (i.e., an NR REDCAP terminal device); the capability parameters corresponding to the first type of terminal device include a first capability set, where the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4. In this way, the terminal device can report its own type to the network device so that the network device determines the capability parameters corresponding to the terminal device according to the type of the terminal device, thereby reducing the resource overhead of the terminal device reporting the capability.

[0136] Optionally, the capability parameters corresponding to the first type of terminal equipment also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set or a seventh capability set. Among them, the second capability set is used to characterize the power saving capability of the terminal equipment; the third capability set is used to characterize the coverage enhancement capability and / or the data transmission rate improvement capability of the terminal equipment; the fourth capability set is used to characterize the short-delay processing capability of the terminal equipment; the fifth capability set is used to characterize the small data transmission capability and / or the inactive data transmission capability of the terminal equipment; the sixth capability set is used to characterize the transmission reliability capability of the terminal equipment; the seventh capability set is used to characterize the URLLC data transmission capability of the terminal equipment. That is, the capability set of the first type of terminal equipment can be defined according to different data transmission requirements, which can meet different requirements of different scenarios for energy saving, coverage and data transmission rate, so that terminal equipment manufacturers can realize the corresponding performance and functions of the first type of terminal equipment according to different requirements in different application scenarios, without having to design a variety of different types of terminal equipment according to different data transmission characteristics, which can avoid market fragmentation caused by too many types of terminal equipment and difficult management.

[0137] The technical solution of the embodiment of the present application can be applied to 5G NR, for example, it can be applied to IWSN, video surveillance and wearable scenarios in mMTC / MTC services. The technical solution provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, which is not limited by the present application.

[0138] Figure 1 A communication system 100 applicable to the present application includes a network device 110 and a terminal device 120. The network device 110 and the terminal device 120 communicate with each other via a wireless network. It should be understood that Figure 1The network device 110 may include one or more cells. When the transmission direction of the communication system 100 is uplink transmission, the terminal device 120 is the transmitter and the network device 110 is the receiver. When the transmission direction of the communication system 100 is downlink transmission, the network device 110 is the transmitter and the terminal device 120 is the receiver.

[0139] Figure 2 It is another communication system 200 applicable to the present application. The communication system 200 is in a dual link / dual connection (dual connectivity, DC) or coordinated multipoint transmission / reception (coordinated multipoint transmission / reception, CoMP) scenario, and the communication system 200 includes a network device 210, a network device 220 and a terminal device 230. The network device 210 is a network device when the terminal device 230 initially accesses, and is responsible for the radio resource control (radio resource control, RRC) communication between the terminal device 230. The network device 220 is added during RRC reconfiguration to provide additional wireless resources. The terminal device 230 configured with CA is connected to the network device 210 and the network device 220. The link between the network device 210 and the terminal device 230 can be referred to as the first link, and the link between the network device 220 and the terminal device 230 can be referred to as the second link.

[0140] The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited thereto. For example, the number of network devices and terminal devices included in the communication system can also be other numbers.

[0141] The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a relay terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a PLMN, etc., and the embodiments of the present application are not limited to this.

[0142] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0143] In addition, in the embodiment of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. In the embodiment of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.

[0144] In addition, in the embodiments of the present application, the terminal device may also include sensors such as smart printers, train detectors, gas stations, etc., and its main functions include collecting data (partial terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0145] The network device in the embodiments of the present application may be a device for communicating with a terminal device. The network device may be a base station (base transceiver station, BTS), a base station (NodeB, NB), an evolved NodeB (eNB or eNodeB), or a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or the network device may be a relay station, a home evolved node B (HeNB), a home base station (Femto), a micro base station (Pico), an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network, etc., and the embodiments of the present application are not limited.

[0146] Embodiments of the present application Figure 1 or Figure 2The terminal device or network device in the embodiment may be implemented by a device or a functional module in a device, and the embodiments of the present application do not specifically limit this. It is understandable that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, virtualization functions instantiated on a platform (e.g., a cloud platform), or chip systems. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0147] For example, the device for implementing the functions of the terminal device provided in the embodiment of the present application can be Figure 3 It is implemented by the device 300 in . Figure 3 The hardware structure diagram of the device 300 provided in the embodiment of the present application is shown. The device 300 includes at least one processor 301, which is used to implement the functions of the terminal device provided in the embodiment of the present application. The device 300 may also include a bus 302 and at least one communication interface 304. The device 300 may also include a memory 303.

[0148] In the embodiments of the present application, the processor may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, or a programmable logic device (PLD). The processor may also be any other device having a processing function, such as an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, software modules, or any combination thereof.

[0149] The bus 302 may be used to transmit information between the above-mentioned components.

[0150] The communication interface 304 is used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. The communication interface 304 can be an interface, circuit, transceiver or other device capable of communication, which is not limited in this application. The communication interface 304 can be coupled to the processor 301. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.

[0151] In the embodiment of the present application, the memory may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may exist independently or be coupled to the processor, for example, through bus 302. The memory may also be integrated with the processor.

[0152] The memory 303 is used to store program instructions, and can be controlled by the processor 301 to execute, thereby implementing the method provided in the following embodiments of the present application. The processor 301 is used to call and execute the instructions stored in the memory 303, thereby implementing the method provided in the following embodiments of the present application.

[0153] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0154] Optionally, the memory 303 may be included in the processor 301 .

[0155] In a specific implementation, as an embodiment, the processor 301 may include one or more CPUs, such as Figure 3 CPU0 and CPU1 in.

[0156] In a specific implementation, as an embodiment, the apparatus 300 may include multiple processors, such as Figure 3 301 and processor 307 in the embodiment of the present invention. Each of these processors may be a single-CPU processor or a multi-CPU processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0157] In a specific implementation, as an embodiment, the apparatus 300 may further include an output device 305 and an input device 306. The output device 305 is coupled to the processor 301 and may display information in a variety of ways. For example, the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 306 is coupled to the processor 301 and may receive user input in a variety of ways. For example, the input device 306 may be a touch screen device or a sensor device.

[0158] The above-mentioned device 300 can be a general-purpose device or a special-purpose device. In a specific implementation, the terminal device 300 can be a vehicle-mounted terminal or a transportation device with a built-in computer (processor) or a Figure 3 The embodiment of the present application does not limit the type of the device 300.

[0159] For example, the device for implementing the functions of the network device provided in the embodiment of the present application can be Figure 4 It is implemented by the device 400 in . Figure 4 The hardware structure diagram of the device 400 provided in the embodiment of the present application is shown. The device 400 includes at least one processor 401, which is used to implement the functions of the terminal device provided in the embodiment of the present application. The device 400 may also include a bus 402 and at least one communication interface 404. The device 400 may also include a memory 403.

[0160] The bus 402 may be used to transmit information between the above-mentioned components.

[0161] The communication interface 404 is used to communicate with other devices or communication networks, such as Ethernet, RAN, WLAN, etc. The communication interface 404 can be an interface, a circuit, a transceiver or other device capable of achieving communication, which is not limited in this application. The communication interface 404 can be coupled to the processor 401.

[0162] The memory 403 is used to store program instructions, and can be controlled by the processor 401 to execute, so as to implement the method provided in the following embodiments of the present application. For example, the processor 401 is used to call and execute the instructions stored in the memory 403, so as to implement the method provided in the following embodiments of the present application.

[0163] Optionally, the memory 403 may be included in the processor 401 .

[0164] In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, such as Figure 4 CPU0 and CPU1 in.

[0165] In a specific implementation, as an embodiment, the apparatus 400 may include multiple processors, such as Figure 4 401 and processor 405 in the embodiment. Each of these processors may be a single-core processor or a multi-core processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0166] The above-mentioned device 400 can be a general device or a special device. In a specific implementation, the device 400 can be a vehicle-mounted terminal or a transportation device with a built-in computer (processor) or a Figure 4 The embodiment of the present application does not limit the type of the device 400.

[0167] In an embodiment of the present application, a terminal device or a network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a CPU, a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program having a code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute a program.

[0168] In addition, various aspects or features of the present application can be implemented as methods, devices or products using standard programming and / or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., CDs, digital versatile disks (digital versatilediscs, DVDs), etc.), smart cards and flash memory devices (e.g., EPROMs, cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0169] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0170] In the embodiment of the present application, a carrier may be equivalent to a cell.

[0171] The technical scheme in the embodiment of the present application will be described below in conjunction with the drawings in the embodiment of the present application. Wherein, in the description of the present application, unless otherwise specified, "at least one" refers to one or more, and "a plurality of" refers to two or more than two. In addition, in order to facilitate the clear description of the technical scheme of the embodiment of the present application, in the embodiment of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit necessarily different.

[0172] For ease of understanding, the information receiving and sending method provided in the embodiments of the present application is specifically introduced below with reference to the accompanying drawings.

[0173] like Figure 5 As shown, the embodiment of the present application provides a method for sending and receiving information, including:

[0174] 501. A terminal device sends first information to a network device.

[0175] Among them, the first information is used to indicate that the terminal device belongs to the first type of terminal device, or in other words, the first information is used to indicate the category (category) or type (type) of the terminal device, and the category or type of the terminal device is the first type. The capability parameters corresponding to the first type of terminal device include a first capability set (capability set). That is, the first information can implicitly indicate (indirectly indicate) the first capability set. Alternatively, the first information can be used to indicate that the capability parameters corresponding to the first type of terminal device include the first capability set, that is, the first information can explicitly indicate (directly indicate) the first capability set.

[0176] The NR system may also include other terminal devices, such as a second type of terminal device. The first type of terminal device and the second type of terminal device may have at least one of the following distinguishing features:

[0177] 1. Different bandwidth capabilities. Bandwidth capabilities can be expressed by carrier bandwidth. For example, the carrier bandwidth of the first type of terminal equipment is not greater than 50 MHz, such as at least one of 50 MHz, 40 MHz, 20 MHz, 15 MHz, 10 MHz or 5 MHz, and the carrier bandwidth of the second type of terminal equipment is greater than 50 MHz.

[0178] 2. The number of transceiver antennas is different. For example, the first type of terminal device can support 2-receive and 1-transmit (2 receiving antennas and 1 transmitting antenna), or 1-receive and 1-transmit (1 receiving antenna and 1 transmitting antenna). The second type of terminal device can support 4-receive and 2-transmit (4 receiving antennas and 2 transmitting antennas). It can be understood that under the condition of achieving the same data transmission rate, since the number of transceiver antennas of the first type of terminal device is less than the number of transceiver antennas of the second type of terminal device, the maximum coverage range that can be achieved by data transmission between the first type of terminal device and the base station is less than the maximum coverage range that can be achieved by data transmission between the second type of terminal device and the base station.

[0179] 3. The maximum uplink transmission power is different. For example, the maximum uplink transmission power of the first type of terminal equipment can be a value between 4 decibel milliwatts (dBm) and 20 dBm. The maximum uplink transmission power of the second type of terminal equipment can be 23 dBm or 26 dBm.

[0180] 4. Different protocol versions. The first type of terminal device may be a terminal device in NR version 17 (Release-17, Rel-17) or a terminal device in a version later than NR Rel-17. The second type of terminal device may be, for example, a terminal device in NR version 15 (Release-15, Rel-15) or NR version 16 (Release-16, Rel-16). The second type of terminal device may also be referred to as an NR legacy terminal device.

[0181] 5. Different carrier aggregation capabilities. For example, the first type of terminal device does not support carrier aggregation, while the second type of terminal device can support carrier aggregation. For another example, both the first type of terminal device and the second type of terminal device can support carrier aggregation, but the maximum number of carrier aggregations simultaneously supported by the first type of terminal device is less than the maximum number of carrier aggregations simultaneously supported by the second type of terminal device. For example, the first type of terminal device supports the aggregation of up to 2 carriers simultaneously, while the second type of terminal device can support the aggregation of up to 5 carriers or 32 carriers simultaneously.

[0182] 6. Different duplex capabilities. For example, the first type of terminal equipment supports half-duplex frequency division duplexing (FDD), while the second type of terminal equipment supports full-duplex FDD.

[0183] 7. Different data processing time capabilities. For example, the minimum delay between the first type of terminal device receiving downlink data and sending feedback on the downlink data is greater than the minimum delay between the second type of terminal device receiving downlink data and sending feedback on the downlink data; and / or, the minimum delay between the first type of terminal device sending uplink data and receiving feedback on the uplink data is greater than the minimum delay between the second type of terminal device sending uplink data and receiving feedback on the uplink data.

[0184] 8. Different processing capabilities (ability / capability). For example, the baseband processing capability of the first type of terminal device is lower than that of the second type of terminal device. The baseband processing capability may include at least one of the following: the maximum number of MIMO layers supported by the terminal device for data transmission, the number of HARQ processes supported by the terminal device, and the maximum transmission block size (TBS) supported by the terminal device.

[0185] 9. The transmission peak rate / peak rate of uplink and / or downlink is different. The transmission peak rate / peak rate refers to the maximum data transmission rate / maximum data rate (maximum data rate) that the terminal device can achieve in a unit of time (for example, per second). The uplink peak rate can refer to the uplink maximum data rate, and the downlink peak rate can refer to the downlink maximum data rate.

[0186] The uplink peak rate supported by the first type of terminal device may be lower than the uplink peak rate supported by the second type of terminal device, and / or the downlink peak rate supported by the first type of terminal device may be lower than the downlink peak rate supported by the second type of terminal device. For example, the uplink peak rate of the first type of terminal device is less than or equal to 50Mbps, and the downlink peak rate is less than or equal to 150Mbps, and the uplink peak rate of the second type of terminal device is greater than or equal to 50Mbps, and the downlink peak rate is greater than or equal to 150Mbps. For another example, the uplink peak rate or downlink peak rate of the first type of terminal device is in the order of hundreds of Mbps, and the uplink peak rate or downlink peak rate of the second type of terminal device is in the order of Gbps.

[0187] 10. Different buffer sizes. The buffer can be understood as the total size of the Layer 2 (L2) buffer, which means the sum of the bytes buffered in the radio link control (RLC) send window, receive window, and reorder window and the bytes buffered in the packet data convergence protocol (PDCP) reorder window for all radio bearers. Alternatively, the buffer can also be understood as the total number of soft channel bits that can be used by HARQ processing.

[0188] Optionally, in an embodiment of the present application, the first type of terminal device may be a REDCAP terminal device in an NR system, or the first type of terminal device may also be referred to as a low-capability terminal device, a reduced-capability terminal device, a REDCAP UE, a Reduced Capacity UE, an mMTC UE, etc. The second type of terminal device may be a terminal device with a traditional capability or / normal capability / high capability, and may also be referred to as a traditional terminal device or a Legacy UE or an LTE terminal device. The second type of terminal device has the above-mentioned distinguishing features from the first type of terminal device.

[0189] It should be noted that, unless otherwise specified, the terminal device referred to below refers to a first type of terminal device, and the first type of terminal device may be, for example, an NR REDCAP terminal device.

[0190] In one possible design, the first capability set corresponding to the first type of terminal device includes the channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device. The channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4. Optionally, the first capability set may also include the number of receiving antennas of the terminal device, and the number of receiving antennas is less than or equal to 4. Since the channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device can directly affect the cost and implementation complexity of the terminal device, the first capability set can be used to characterize the cost and / or implementation complexity of the terminal device. The first capability set can be considered to be a basic capability set / mandatory capability set of the terminal device, and the basic capability set / mandatory capability set includes mandatory capability parameters of the terminal device.

[0191] In another possible design, the first capability set corresponding to the first type of terminal device includes the number of transmitting antennas of the terminal device. The number of transmitting antennas of the terminal device is less than or equal to 4. It can be understood that the number of transmitting antennas will affect the radio frequency (RF) channel design of the terminal device and the device size of the terminal device, and will have a significant impact on the cost of the terminal device. Therefore, including only the number of transmitting antennas in the required capability set can also represent the reduction of the cost of the terminal device. In another possible design, the first capability set corresponding to the first type of terminal device includes the channel bandwidth supported by the terminal device. The channel bandwidth of the terminal device is less than 100MHz.

[0192] Among them, the channel bandwidth supported by the terminal device (or the channel bandwidth of the terminal device) refers to the maximum channel bandwidth (maximum frequency resource) that the terminal device can support, that is, the bandwidth capability of the terminal device. The bandwidth capability of the terminal device can be understood as the channel bandwidth supported by the terminal device on an uplink NR RF carrier or a downlink NR RF carrier, that is, the channel bandwidth of the terminal device corresponds to an uplink NR RF carrier bandwidth or corresponds to a downlink NR RF carrier bandwidth. For a time division duplex (TDD) system, the bandwidth capability of the terminal device can be understood as the channel bandwidth supported by the terminal device on an NRRF carrier. The terminal device can perform data transmission (including reception of downlink data and / or transmission of uplink data) with a network device (e.g., a base station) based on the bandwidth capability of the terminal device. For example, assuming that the bandwidth capability of a terminal device is 20MHz, when the terminal device performs data transmission with the base station, the terminal device can be scheduled within the entire transmission bandwidth excluding the protection bandwidth within the 20MHz frequency resource, or the RF device processing and baseband device processing of the terminal device can process data transmitted within a maximum bandwidth of 20MHz.

[0193] In one implementation, the first capability set may include at least one of 5MHz, 10MHz, 20MHz, or 50MHz, and in this case, the bandwidth capabilities included in the first capability set may be considered mandatory capabilities, that is, the terminal device may support at least one of 5MHz, 10MHz, 20MHz, or 50MHz bandwidth capabilities.

[0194] In another implementation, the terminal device may support at least one bandwidth capability of 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 50 MHz.

[0195] In another implementation, the first capability set includes only 20 MHz, that is, 20 MHz is a mandatory capability of the first type of terminal device. The remaining data transmission bandwidths, such as 5 MHz or 10 MHz, may be optional capabilities of the terminal device.

[0196] In another implementation, the first capability set includes only at least two of 5 MHz, 10 MHz, 15 MHz, and 20 MHz. For example, the first capability set includes 20 MHz and 15 MHz, or the first capability set includes 10 MHz, 15 MHz, and 20 MHz.

[0197] Since different frequency bands are used in different network deployments, and different frequency bands correspond to different system bandwidths, the bandwidth capability parameters included in the bandwidth capability set have different values, which facilitates the terminal device to transmit data with the network device on different frequency bands. This can increase the application market scope of the terminal device, facilitate the mass production of the terminal device, and contribute to the ecological development of this type of terminal device. For example, if the frequency band bandwidth or system bandwidth corresponding to the frequency band of the network deployment is 10MHz or 15MHz (for example, the 10MHz bandwidth near the 700MHz frequency band deployed in Europe and other networks, or the 15MHz bandwidth near 2.1GHz), then the terminal device with a bandwidth capability of no more than 15MHz can transmit data with the network device under the network deployment; for another example, if the frequency band bandwidth of the network deployment is 20MHz or 50MHz, then the first capability set includes terminal devices with a bandwidth capability less than 20MHz or 50MHz, which can transmit data with the network device under the network deployment.

[0198] In another implementation, the first type of terminal device supports at least one bandwidth capability, or the first capability set includes at least one bandwidth capability, and the at least one bandwidth capability is less than 20 MHz or less than 50 MHz.

[0199] In an embodiment of the present application, in one implementation, a bandwidth capability of less than 20 MHz may be a mandatory capability of the first type of terminal device, and the mandatory capability may include at least one bandwidth capability of less than 20 MHz, such as 5 MHz, 10 MHz, or 15 MHz. In another implementation, a bandwidth capability of less than 50 MHz may be a mandatory capability of the first type of terminal device, and the mandatory capability may include at least one bandwidth capability of less than 50 MHz.

[0200] The terminal device can report other bandwidth capabilities (for example, 5MHz, 10MHz or 50MHz) except the mandatory capabilities separately, or report them through other capability sets. That is, the bandwidth capability of the terminal device can be 10MHz, 5MHz or 50MHz in addition to 20MHz. A terminal device with a 10MHz bandwidth capability can work in a system with a system bandwidth of not less than 10MHz, a terminal device with a 5MHz bandwidth capability can work in a system with a system bandwidth of not less than 5MHz, a terminal device with a 20MHz bandwidth capability can work in a system with a system bandwidth of not less than 20MHz, and a terminal device with a 50MHz bandwidth capability can work in a system with a system bandwidth of not less than 50MHz, where the system bandwidth can be understood as the network device carrier bandwidth. It can be understood that terminal devices with a smaller data transmission bandwidth (for example, 5MHz or 10MHz) are used in scenarios with low requirements for data transmission rates, such as IWSN scenarios or economical video surveillance scenarios; terminal devices with a larger data transmission bandwidth (for example, 50MHz) are used in scenarios with higher requirements for data transmission rates, such as wearable scenarios.

[0201] In addition, the channel bandwidth supported by the terminal device in the first capability set may be a range, for example, 5 MHz-10 MHz, 10 MHz-20 MHz, or 5 MHz-50 MHz.

[0202] Among them, the total number of transmit and receive antennas of the terminal device can be understood as the actual number of physical antennas possessed by the terminal device, or the number of antenna ports used for data transmission. The number of antenna ports used for data transmission is less than or equal to the actual number of physical antennas of the terminal device. It should be noted that in an embodiment of the present application, the number of receive antennas of the terminal device is X, which can also be understood as the maximum number of PDSCH MIMO layers supported by the terminal device is X, where X is an integer greater than or equal to 1. For example, the number of receive antennas supported by the terminal device is 2, which can be understood as the maximum number of PDSCH MIMO layers supported by the terminal device is 2. The number of transmit antennas of the terminal device is Y, which can be understood as the number of antenna ports corresponding to the uplink data transmission of the terminal device is Y, where Y is an integer greater than or equal to 1. For example, the number of transmit antennas of the terminal device is 1, which can be understood as the number of antenna ports corresponding to the uplink data transmission of the terminal device is 1. Alternatively, the number of transmit antennas supported by the terminal device can be reflected by whether the sounding reference signal (SRS) transmission switch and the number of PUSCH MIMO layers are supported. For example, if the terminal device does not support SRS transmission switching and the number of PUSCH MIMO layers is 1, that is, the terminal device supports single-port MIMO transmission, it can be determined that the number of transmission antennas supported by the terminal device is 1.

[0203] In addition, the number of transmitting and receiving antennas included in the terminal device in the first capability set can be a range, for example, the number of transmitting antennas can be 1-2, the number of receiving antennas can be 1-2, and so on.

[0204] In one implementation, the first capability set may include at least one of the following: the transceiver antenna is configured as 1 transmit antenna and 2 receive antennas (abbreviated as 1T2R), 1 transmit antenna and 1 receive antenna (abbreviated as 1T1R), 2 transmit antennas and 2 receive antennas (abbreviated as 2T2R). At this time, it can be considered that the antenna capabilities included in the first capability set are all mandatory capabilities. That is, the terminal device can support at least one of 1T2R, 1T1R or 2T2R. In another implementation, the first capability set may only include 1T2R, and the terminal device may report other antenna capabilities supported by the terminal device separately, or report them through other capability sets. That is, 1T2R is a mandatory capability of the terminal device. The remaining transceiver antenna configurations (for example, 1T1R or 2T2R) may be optional capabilities of the terminal device. It can be understood that terminal devices with fewer transmitting and receiving antenna configurations (for example, 1T1R) are suitable for scenarios with lower requirements for data transmission rates, such as IWSN scenarios with data transmission rates not exceeding 2Mbps, which can further reduce the cost of terminal equipment operation; terminal devices with more antenna configurations (for example, 2T2R) are suitable for scenarios with higher requirements for data transmission, such as smart wearable device scenarios, which can meet the data transmission rate requirements in smart wearable scenarios.

[0205] Optionally, the first capability set may also include at least one of the number of HARQ processes supported by the terminal device, the maximum modulation mode of uplink data transmission, the maximum modulation mode of downlink data transmission, PDSCH processing capability or PUSCH processing capability.

[0206] Among them, the number of HARQ processes supported by the terminal device is less than or equal to 16. Taking the downlink (DL) HARQ process as an example, a DL HARQ process refers to the process from the base station scheduling a data transmission to the base station receiving an acknowledgement (ACK) / negative acknowledgement (NACK). The number of HARQ processes refers to the number of concurrent HARQs, that is, the number of data transmissions that the terminal device can process simultaneously. The more HARQ processes there are, the stronger the terminal device's ability to process data in parallel. Accordingly, the higher the device cost requirements and the processing capability requirements for the terminal device.

[0207] The maximum modulation mode for uplink data transmission is 64QAM, and the maximum modulation mode for downlink data transmission is 64QAM. The lower the modulation order corresponding to the maximum data transmission modulation mode supported by the terminal equipment, the lower the cost of the terminal equipment will be. This is because the modulation signal corresponding to the high-order modulation has a large variation range and the peak-to-average ratio of the instantaneous power is high, which will increase the cost of the power amplifier.

[0208] Optionally, the first capability set may further include a buffer size of the terminal device, which may be used to indicate the maximum number of information bits that the terminal device can receive or send in one data transmission scheduling between the terminal device and the base station. The buffer size of the terminal device may be represented by a TBS size. It is understandable that, in one data transmission scheduling, the larger the maximum number of information bits that the terminal device can transmit, the higher the device cost of the terminal device.

[0209] Optionally, the first capability set may also include other data transmission features associated with cost or implementation complexity. For example, the first capability set may also include demodulation reference signal (DMRS) types. Currently in the NR system, DMRS types may include DMRS type 1 and DMRS type 2. The main difference between DMRS type 1 and DMRS type 2 is that the number of antenna ports for simultaneous data transmission is different. For example, if the number of pre-placed DMRS symbols is only 1, then the number of antenna ports supported by DMRS type 1 and DMRS type 2 is 4 and 6 respectively. If the number of pre-placed DMRS symbols is 2, then the number of antenna ports supported by DMRS type 1 and DMRS type 2 is 8 and 12 respectively. Among them, the length of the pre-placed DMRS symbol can be 1 OFDM symbol or 2 OFDM symbols, and the number of antenna ports supported by pre-placed DMRS symbols of different lengths is different. For example, for high-speed mobile scenarios, the longer the length of the pre-placed DMRS symbol, the better the channel estimation performance. In addition, the current DMRS configuration in NR also includes additional (additional) DMRS symbols. The network device can configure 1 additional DMRS for the terminal device, or 2 additional DMRS. The number of OFDM symbols occupied by each additionally configured DMRS is the same as the number of OFDM symbols occupied by the pre-DMRS. For example, if the OFDM symbol length occupied by 1 pre-DMRS is 2, then the OFDM symbol length occupied by each additional DMRS is also 2. At present, the second type of terminal equipment can support 1 pre-DMRS symbol and 2 additional DMRS symbols, but for the first type of terminal equipment, based on the number of its transceiver antennas and the main application scenarios (such as non-high-speed motion IWSN scenarios, video surveillance scenarios, and wearable scenarios), it can support DMRS type 1, and further, it can support DMRS configuration of 1 pre-DMRS symbol and 2 additional DMRS symbols under type 1, which can reduce the implementation complexity of the first type of terminal equipment.

[0210] Specifically, the PDSCH processing capability corresponds to a first time offset, and the first time offset refers to the time offset between the end of receiving the last symbol of the PDSCH and the sending of the first symbol of the PUCCH by the terminal device. The PDSCH processing capability meets capability 1, that is, the first time offset is greater than or equal to the first preset threshold. Among them, the PUCCH carries the HARQ-ACK feedback corresponding to the PDSCH, and the HARQ-ACK feedback includes any of the following: ACK, NACK or discontinuous transmission (DTX).

[0211] As shown in Table 2, the first time offset corresponds to different lower limits under different SCSs and different DMRS configurations. In Table 2, SCS represents the maximum value of the SCS corresponding to the PDSCH and the SCS corresponding to the PUCCH.

[0212] Table 2

[0213]

[0214]

[0215] Exemplarily, it can be seen from Table 2 that when SCS=15KHz and DMRS is configured as pre-DMRS, the lower limit of the first time offset is 0.57ms, that is, the first time offset is greater than or equal to 0.57ms. Optionally, the first capability set includes a first time offset parameter between PDSCH and PUCCH, and the value of this parameter is 0.57ms.

[0216] The terminal device supports PUSCH processing capability, and the PUSCH processing capability corresponds to a second time offset. The second time offset refers to the time offset between the terminal device receiving the last symbol of the PDCCH and sending the first symbol of the PUSCH scheduled by the PDCCH. The PUSCH processing capability meets capability 2, that is, the second time offset is greater than or equal to the second preset threshold.

[0217] As shown in Table 3, the second time offset corresponds to different lower limits under different SCSs. In Table 3, SCS represents the maximum value of the SCS corresponding to the PDCCH and the SCS corresponding to the PUSCH.

[0218] Table 3

[0219] SCS=15KHz SCS=30KHz SCS=60KHz SCS=120KHz 0.71ms 0.43ms 0.41ms 0.32ms

[0220] Exemplarily, it can be seen from Table 3 that when SCS=30KHz, the lower limit of the second time offset is 0.43ms, that is, the second time offset is greater than or equal to 0.43ms. Optionally, the first capability set includes a second time offset parameter between PDCCH and PUSCH, and the value of the parameter is 0.43ms.

[0221] In an embodiment of the present application, the PDSCH processing capability corresponds to a first time offset, or corresponds to an NR legacy terminal device (NR legacy) PDSCH processing time capability 1; the PUSCH processing capability corresponds to a second time offset, or corresponds to an NR legacy PUSCH processing time capability 1. Among them, the NR legacy terminal device can be understood as a second type of terminal device. That is, the PDSCH processing capability of the first type of terminal device (such as an NR REDCAP terminal device) can be the same as the PDSCH processing time capability 1 of the NR legacy terminal device, and the PUSCH processing capability of the NR REDCAP terminal device can be the same as the NR legacy PUSCH processing time capability 1, without the need for relaxation (extension). This is because even if the PDSCH processing capability and / or PUSCH processing capability of the NR REDCAP terminal device is relaxed, the implementation complexity or cost of the first type of terminal device will not be reduced. At the same time, maintaining the same processing capability as the NR legacy processing time capability 1 can ensure the data transmission delay and thus meet the data transmission requirements. Therefore, the PDSCH processing capability of the first type of terminal device can be set to be the same as the PDSCH processing capability of the second type of terminal device, and the PUSCH processing capability of the first type of terminal device can be set to be the same as the PUSCH processing capability of the second type of terminal device.

[0222] In summary, exemplarily, the first capability set corresponding to the first type of terminal device may include any of the following combinations:

[0223] Combination 1: The channel bandwidth of the terminal device is 20MHz, the number of transmitting and receiving antennas is 1T2R, and the maximum modulation mode of uplink and downlink data transmission is 64QAM. Combination 1 helps to reduce the data transmission capacity of the terminal device, and the peak rate can reach tens of Mbps to 100Mbps, which can meet the data transmission requirements of the first type of terminal devices in most MTC scenarios, such as the video surveillance scenario mentioned above, IWSN scenario, and wearable scenario.

[0224] Combination 2: The channel bandwidth of the terminal device is 20MHz, the number of transmitting and receiving antennas is 1T2R, the maximum modulation mode of uplink and downlink data transmission is 64QAM, the first time offset is any value listed in Table 2, and the second time offset is any value listed in Table 3. Combination 2 can not only achieve the effect of combination 1, but also has the ability to process data faster, and is more suitable for application scenarios that are sensitive to latency requirements, such as IWSN scenarios.

[0225] Combination 3: The channel bandwidth of the terminal device is 5MHz or 10MHz, the number of transmitting and receiving antennas is 1T1R, and the maximum modulation mode of uplink and downlink data transmission is 64QAM. Combination 3 can further reduce the cost and complexity of the terminal device and is more suitable for scenarios with low data transmission rate requirements, such as IWSN scenarios or economical video surveillance scenarios.

[0226] Combination 4: The channel bandwidth of the terminal device is 20 MHz, the number of transmitting and receiving antennas is 1T1R, and the maximum modulation mode of uplink and downlink data transmission is 64QAM.

[0227] Combination 5: The channel bandwidth of the terminal device is 20 MHz, and the number of transmitting and receiving antennas is 1T1R.

[0228] Combination 6: The channel bandwidth of the terminal device is 20 MHz, the number of transmitting and receiving antennas is 1T2R, the maximum modulation mode of uplink data and downlink data transmission is 64QAM, the PDSCH processing capability is NR legacy PDSCH processing time capability 1, and the PUSCH processing capability is NR legacy PUSCH processing time capability 1.

[0229] Combination 7: The channel bandwidth of the terminal device is greater than 20 MHz and not greater than 50 MHz, for example, 40 MHz, and the number of transmitting and receiving antennas is 1T1R.

[0230] Combination 8: The channel bandwidth of the terminal device is greater than 20 MHz and not greater than 50 MHz, for example, 40 MHz, the number of transmitting and receiving antennas is 1T1R, and the maximum modulation mode of uplink and downlink data transmission is 64QAM.

[0231] Combination 9: The channel bandwidth of the terminal device is greater than 20MHz and not greater than 50MHz, for example, 40MHz, the number of transmitting and receiving antennas is 1T1R, the maximum modulation mode of uplink and downlink data transmission is 64QAM, the PDSCH processing capability is NR legacy PDSCH processing time capability 1, and the PUSCH processing capability is NR legacy PUSCH processing time capability 1.

[0232] Optionally, in the above combinations, the channel bandwidth or the number of transmitting and receiving antennas of the terminal device is only an example and can be replaced by other values, which is not limited in this application.

[0233] Optionally, the first capability set may include subcarrier spacing. The first capability set corresponding to the first type of terminal equipment may include subcarrier spacing corresponding to any of the following methods. In one method, the first capability set includes 15KHz subcarrier spacing and 30KHz subcarrier spacing, and 15KHz subcarrier spacing and 30KHz subcarrier spacing are both required subcarrier spacings, and there are no other optional subcarrier spacings; in another method, the first capability set includes 15KHz subcarrier spacing and 30KHz subcarrier spacing, and 15KHz subcarrier spacing and 30KHz subcarrier spacing are required subcarrier spacings, and 60KHz subcarrier spacing can be used as an optional capability; in another method, the first capability set includes 15KHz subcarrier spacing, 30KHz subcarrier spacing and 60KHz subcarrier spacing, and 15KHz subcarrier spacing, 30KHz subcarrier spacing and 60KHz subcarrier spacing are all required subcarrier spacings.

[0234] In some embodiments, the capability parameters corresponding to the first type of terminal equipment also include at least one capability set in the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set. It can be considered that at least one capability set in the second capability set to the seventh capability set and the first capability set are mandatory capability sets, or it can also be considered that at least one capability set in the second capability set to the seventh capability set is an optional or candidate capability set. Among them, the second capability set is used to characterize the power saving capability of the terminal device; the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; the fourth capability set is used to characterize the short delay processing capability of the terminal device; the fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device; the sixth capability set is used to characterize the transmission reliability capability of the terminal device; the seventh capability set is used to characterize the URLLC data transmission capability of the terminal device. That is, the capability parameters of the first type of terminal equipment may include multiple different capability sets, and different capability sets correspond to different data transmission performance requirements. Data transmission performance requirements may include, for example, power saving requirements, coverage requirements, data transmission rate requirements, short delay processing requirements, small data transmission requirements and / or inactive data transmission requirements or URLLC data transmission requirements, etc. In this way, by defining multiple different capability sets, different requirements of different scenarios can be met, and it is convenient for each terminal manufacturer to implement terminal equipment capabilities that are adapted to their needs according to the corresponding application scenario requirements.

[0235] Different capability sets include capabilities (or capability characteristics / features) corresponding to different data transmission performance requirements. The capability characteristics of a terminal device can be used to characterize the data transmission capabilities that the terminal device can support when transmitting data with a network device. The network device can use a data transmission technology adapted to the data transmission capability within the range of the data transmission capability supported by the terminal device to complete data transmission between the terminal device and the network device.

[0236] The capability features included in the second capability set are associated with the power consumption of the terminal device. The network device can determine the data transmission mode adapted to the capability features according to the capability features in the second capability set to reduce the power consumption of the terminal device. The second capability set may also be referred to as an energy-saving capability set. The second capability set includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross slot scheduling, the terminal device supports receiving WUS or the terminal device supports relaxation of neighboring cell RRM measurements, the terminal device supports PDCCH-based WUS reception, the terminal device supports reduced power consumption data transmission in idle state or inactive state (for example, the terminal device supports paging enhancement technology) or the terminal device supports extended discontinuous reception (eDRX).

[0237] It is understandable that data transmission between the terminal device and the network device can be achieved through the scheduling of the network device. In this implementation mode, the terminal device needs to blindly detect the PDCCH to determine whether the network device has scheduled itself, and determine the specific scheduling information based on the DCI carried in the PDCCH to complete the data transmission. The more DCIs with different DCI sizes detected by the terminal device, the more blind detections the terminal device makes, and accordingly, the greater the power consumption of the terminal device. Therefore, by limiting the maximum number of DCIs with different DCI sizes that the terminal device supports detection in a cell, the upper limit of the power consumption consumed by the terminal device when blindly detecting the PDCCH can be limited to a certain extent. That is, the maximum number of DCIs with different DCI sizes supported by the terminal device can assist the network device in adopting an adaptive data transmission technology to achieve data transmission with the terminal device and reduce the power consumption of the terminal device in detecting the PDCCH.

[0238] The maximum number of DCIs with different DCI sizes supported by the first type of terminal device for detection in a cell is less than 4. For example, the maximum number of DCIs with different sizes supported by the terminal device for detection in a cell may be 2, and the two DCIs of different sizes may be distributed in different search spaces (search space, SS), for example, there is one DCI size in the common search space (common search space, CSS) configured by the terminal device, and there is another DCI size in the terminal device specific search space (UE specific search space, USS). Alternatively, different DCI sizes may also be distinguished according to the radio network temporary identity (radio network temporary identity, RNTI), for example, the UE's RNTI (UE specific RNTI) corresponds to one DCI size, and the common RNTI corresponds to another DCI size. As an optional capability, the terminal device may support the detection of DCIs with three DCI sizes in a cell. In addition, the maximum number of DCIs of different DCI sizes supported by the terminal device in the second capability set may be a range, for example, 1-4.

[0239] Cross-slot scheduling means that the control information for scheduling the data transmission of the terminal device and the data transmission determined by the terminal device according to the control information are not in the same time slot. For example, assuming that the channel carrying the control information is represented by PDCCH, and the channel carrying the data transmission determined according to the control information is represented by PDSCH, in cross-slot scheduling, PDCCH and PDSCH are not in the same time slot. Taking downlink data transmission as an example, the terminal device can determine the resources occupied by the scheduled data transmission after detecting PDCCH and parsing the DCI carried by PDCCH, and then receive the data sent by the network device on the corresponding resources, and then process the received data (processing includes but is not limited to demodulation and decoding). On the contrary, if the terminal device does not support cross-slot scheduling capability, that is, PDCCH and PDSCH are in the same time slot, the terminal device cannot predict the frequency resources occupied by the PDSCH scheduled by the PDCCH when detecting PDCCH, so it can only cache the data within the maximum frequency resource range that can be supported while detecting PDCCH, and after parsing the DCI carried by the PDCCH, determine the effective frequency range of the scheduled data within the maximum frequency resource range of the cache according to the DCI indication. For example, an existing NR terminal device can complete data transmission within an activated bandwidth part (bandwidth part, BWP), and the BWP size can be, for example, 20MHz. Under non-cross-slot scheduling, when the terminal device starts to detect PDCCH, it needs to cache data within the 20MHz frequency resource range, but it is possible that the network device does not schedule the terminal device (that is, the terminal device does not detect its own DCI despite blindly detecting PDCCH) or even if the network device schedules the terminal device, the frequency resource corresponding to the scheduled data transmission is much less than 20MHz, such as only 5MHz, which will cause the terminal device to generate additional cache power consumption. Based on this, cross-slot scheduling can be used to reduce the power consumption of the terminal device cache data during data transmission between the network device and the terminal device. The network device can adaptively configure the cross-slot scheduling mode according to the cross-slot scheduling function supported by the terminal device to realize the low-power data transmission process of the terminal device. It should be noted that in an embodiment of the present application, the time slot in the cross-slot scheduling can be replaced by a time unit. For example, the time unit can be a subframe or a radio frame, indicating that the control information for scheduling the data transmission of the terminal device and the data transmission determined by the terminal device according to the control information are not in the same subframe or radio frame. For another example, a time unit may include 7 OFDM symbols or 4 OFDM symbols or another number of symbols, indicating that the control information for scheduling the data transmission of the terminal device and the data transmission determined by the terminal device based on the control information are not within the same 7 symbols or 4 symbols or another number of symbols.

[0240] The terminal device supports WUS reception, which helps the terminal device reduce power consumption, especially the power consumption of detecting PDCCH. The WUS signal can be sent before the DRX cycle corresponding to the terminal device to indicate whether the terminal device needs to detect PDCCH in the next one or more DRX cycles. Especially for service types such as instant messaging and / or web browsing, the terminal device does not need to detect PDCCH, thereby saving PDCCH detection power consumption.

[0241] The terminal device supports the relaxation of neighboring cell RRM measurements, which may mean that the terminal device supports a larger neighboring cell RRM measurement period, or the terminal device may not perform RRM measurements on neighboring cells with the same or different frequencies as the serving cell. For low-speed or fixed terminal devices, the cell where the terminal device resides usually does not change (i.e., there is a high probability that cell reselection will not occur), so there is no need to perform frequent neighboring cell RRM measurements. At this time, the terminal device supports the relaxation of RRM measurements to avoid the terminal device from performing unnecessary RRM measurements, thereby reducing power consumption.

[0242] The terminal device supports the paging enhancement technology, which means that the terminal device can receive enhanced paging information, which can be used to indicate whether the terminal device needs to perform paging detection. The enhanced paging information can be carried by PDCCH or PDSCH. By receiving the enhanced paging information, the terminal device can stop subsequent paging detection behaviors, such as stopping detection of PDSCH carrying paging information, when it is determined that the network device has not paged itself, to reduce power consumption.

[0243] The terminal device supports extended discontinuous reception (eDRX), which means that the terminal device can support a larger discontinuous reception (DRX) cycle, which can reduce the power consumption of the terminal device.

[0244] Optionally, the second capability set may also include the terminal device supporting reception of further enhanced WUS in the future (such as NR Rel-17 and later protocol versions) and the terminal device supporting radio link management (RLM) measurement relaxation, etc.

[0245] The capability features included in the third capability set are related to ensuring the coverage performance / data transmission rate of the terminal device. It can be understood that the capability features used to ensure the data rate of the terminal device can also be used to ensure the coverage performance of the terminal device. For example, assuming that the coverage range that the terminal device can achieve under the data transmission rate Rate1 is Coverage1 (that is, the data transmission rate between the terminal device in Coverage 1 and the network device is Rate 1), if capability feature 1 can assist the terminal device to achieve the data transmission rate Rate2 under Coverage1, assuming that Rate2 is greater than Rate1, then the terminal device with capability feature 1 can reach Coverage2 while ensuring that the data rate between the terminal device and the network device is Rate1, and Coverage2 is greater than Coverage1. That is, capability feature 1 can be used to improve both the data rate of the terminal device and the coverage performance of the terminal device. The third capability set can also be called the coverage / data transmission rate capability set. The network device can adopt a data transmission method adapted to the capability feature according to the capability feature in the third capability set to ensure the coverage / data transmission rate of the terminal device. The increased data transmission rate of the terminal device can also be equivalent to less time and frequency resources consumed when the terminal device reaches the target data transmission rate, so that the network equipment can serve more terminal devices that need to reach the target data transmission rate.

[0246] The third capability set includes at least one of the following: the terminal device supports SUL, the terminal device supports PDCCH repeated transmission, the terminal device supports the time domain resources corresponding to PDCCH greater than 3 OFDM symbols, the terminal device supports virtual carriers, or the terminal device supports BWP switching delay not greater than RF retuning time.

[0247] The terminal device supports the SUL data transmission mode, which means that in addition to the ability to perform data transmission on the NR uplink (NR uplink, NUL) carrier and the base station, the terminal device can also use the SUL carrier and the base station for data transmission. Data transmission through the SUL carrier and the base station is equivalent to increasing the uplink transmission resources, thereby improving the uplink data transmission rate. In addition, if the center frequency of the SUL carrier is lower than the center frequency of the NUL carrier, the uplink data transmission range of the terminal device on the SUL and the base station can be greater than the uplink data transmission range of the terminal device on the NUL and the base station. In order to reduce the cost of the terminal device, when supporting the SUL data transmission mode, the terminal device can use one RF radio frequency transmission link as a mandatory capability, that is, the terminal device has only one uplink transmission link (or uplink RF). In other words, although the terminal device can complete uplink data transmission with the base station through NUL or SUL, at any time, the terminal device can only complete uplink data transmission with the base station through one type of uplink carrier (NUL or SUL). The terminal device transmits data with the base station via NUL, and the terminal device transmits data with the base station via SUL, and can share the baseband (BB) and radio frequency RF processing unit. When the terminal device needs to switch from SUL to NUL, or from NUL to SUL, the switching delay can be set to no more than 140 microseconds. In this way, the data transmission coverage of the terminal device can be guaranteed, and relatively fast uplink carrier switching can be achieved, with little impact on the service terminal. Optionally, the terminal device can have a SUL data transmission function on the NR TDD band, that is, when the terminal device transmits data with the base station via the NR TDD band, the terminal device can support the SUL data transmission method to achieve a data transmission rate comparable to LTE CAT 4 (that is, a downlink peak rate of 150Mbps and an uplink peak rate of 50Mbps). Figure 6As shown, the data transmission structure of the terminal device in the TDD band jointly considering SUL and the data transmission structure of the terminal device in the FDD band are respectively shown. In the FDD band, the terminal device supports the ability to transmit data between the NUL carrier and the base station and the ability to transmit data between the NR downlink (NR downlink, NDL) carrier and the base station. In the TDD band, the terminal device not only supports the ability to transmit data between the NUL carrier and the base station and the ability to transmit data between the NDL carrier and the base station, but also supports the SUL data transmission method. That is, in the TDD band, by adding SUL, the data transmission rate of the terminal device can reach the data transmission rate achieved by the terminal device in the FDD band, and relative to the working mode of the terminal device in the FDD band, the terminal device jointly considers SUL in the TDD band, without changing the hardware specifications (ie, without increasing RF), The data transmission coverage and data transmission rate of the terminal device and the base station for data transmission are improved.

[0248] After the subsequent NR system refarms the LTE frequency band, that is, reallocates the frequency band in LTE, the network device may include a medium access control (MAC) scheduler with NR carrier aggregation (CA) function, which can schedule NR UE (for example, second type of terminal device) that supports CA of FDD and TDD carriers, and can also support scheduling NR REDCAP UE of TDD NUL+SUL. Among them, NR REDCAP UE of TDD NUL+SUL refers to a terminal device that supports SUL function in the TDD frequency band. The terminal device has the SUL function, especially the SUL function in the TDD frequency band, and can also adapt to subsequent network deployment scenarios to ensure service.

[0249] The maximum number of OFDM symbols of the time domain resources corresponding to the PDCCH received by the terminal device is greater than 3. Among them, the time domain resources corresponding to the PDCCH can be represented by the number of OFDM symbols configured in the time domain of the control resource set (CORESET). The more OFDM symbols configured in the CORESET time domain, the more time-frequency resources used to transmit the PDCCH will increase accordingly, and the PDCCH detection performance will be better, thereby ensuring the reception coverage of the downlink control channel of the terminal device.

[0250] The bandwidth of the virtual carrier supported by the terminal device is not less than the bandwidth capability of the terminal device. The virtual carrier can be configured to the terminal device by the network device through terminal device-specific signaling (such as RRC dedicated signaling). The virtual carrier may include only one synchronization signal block (SSB) for the terminal device to reside, which can reduce the SSB overhead. Optionally, within the virtual carrier, the terminal device can transmit data with the network device through the BWP, and the switching delay between different BWPs can be less than the corresponding switching delay when the second type of terminal device implements BWP switching. Through virtual carrier configuration, the terminal device can implement data transmission with the network device within a larger channel bandwidth, thereby improving data transmission performance and coverage performance.

[0251] In one implementation, the terminal device (first type terminal device) can support a first BWP switching delay, and the first BWP switching delay is less than the delay when the second type terminal device performs BWP switching. In another implementation, the terminal device supports at least one BWP switching delay, and at least one BWP switching delay includes a first BWP switching delay, and the first first BWP switching delay is less than the second BWP switching delay, and the second BWP switching delay is the same as the delay when the second type terminal device performs BWP switching. In this way, the first type terminal device can implement BWP dynamic switching relative to the second type terminal device. Among them, the first BWP switching delay can be the time required for the first type terminal device to perform RF retuning, such as 140 microseconds, or other values, without specific limitation. Compared with the second type terminal device, the first type terminal device supports a shorter BWP switching delay, which can enable the network device to adjust the BWP corresponding to the data transmission between the first type terminal device more quickly, thereby ensuring the frequency selective scheduling gain.

[0252] Optionally, the third capability set may also include support for channel state information (CSI) feedback configuration by the terminal device. CSI feedback can assist the base station in knowing the channel state of the terminal device during data transmission, and then configure the adapted data transmission parameters, such as the modulation coding scheme (MCS), to ensure the data transmission rate. Optionally, the third capability set may also include a function for the terminal device to support repeated transmission of PUSCH.

[0253] The fourth capability set can be used to characterize the short time processing capability of the terminal device, and the fourth capability set can be called a short time processing capability set. The fourth capability set may include at least one of the following: the terminal device supports uplink data transmission based on mini-slots, the terminal device supports downlink data transmission based on mini-slots, the terminal device supports grant free uplink data transmission or the terminal device supports grant free downlink data transmission, the terminal device supports downlink semi-persistent scheduling (SPS) data transmission, and the terminal device supports short physical uplink control channel format (short physical uplink control channel format, short PUCCH format) 0 or short PUCCH format 2.

[0254] The uplink data transmission and / or downlink data transmission based on mini-slot of the terminal device can be understood as the time unit corresponding to the data transmission between the terminal device and the network device can be non-slot. Assuming that 1 slot includes 14 OFDM symbols, then non-slot refers to a time unit less than 14 OFDM symbols. For example, the number of symbols corresponding to the PDSCH transmission or PUSCH transmission between the terminal device and the network device can be at least one of the following: 2 OFDM symbols, 4 OFDM symbols, and 7 OFDM symbols. Compared with slot-based data transmission, under non-slot-based data transmission, the network device or terminal device does not need to receive the data of the entire slot before starting to perform data demodulation. The number of OFDM symbols corresponding to the data transmission between the terminal device and the network device is reduced, and the data transmission delay is reduced, thereby achieving short-delay data transmission.

[0255] The terminal device supports grant free uplink data transmission, which can be understood as the terminal device supporting type 1 (Type 1) grant free data transmission or type 2 (Type 2) grant free data transmission. In the Type 1 grant free data transmission mode, various resources associated with uplink data transmission between the network device and the terminal device are configured through RRC signaling; in the Type 2 grant free data transmission mode, the resources associated with uplink data transmission between the network device and the terminal device are determined by RRC signaling configuration and physical layer signaling indication. In the data transmission mode based on grant free, the network device does not need to send scheduling signaling for each data transmission, so the terminal device does not need to detect scheduling signaling for each data transmission, thereby reducing data processing latency. Compared with Type 2 grant free, when the terminal device supports Type 1 grant free, the data processing latency of the terminal device is lower.

[0256] When the terminal device supports downlink SPS data transmission, the resources associated with the downlink data transmission between the terminal device and the network device can be configured based on RRC signaling, or based on RRC signaling configuration and physical layer signaling indication. For terminal devices that support downlink SPS data transmission, since there is no need to detect the scheduling information sent by the network device every time data is transmitted, the data transmission delay is reduced. In an embodiment of the present application, the resources associated with data transmission may include time-frequency resources for data transmission, MCS, and TBS corresponding to data transmission, etc.

[0257] In terms of physical uplink control channel transmission, the terminal device can support PUCCH transmission formats based on short physical uplink control channel format (short physical uplink control channel format, short PUCCH format) 0 and / or short PUCCH format 2. Among them, the number of time domain OFDM symbols corresponding to short PUCCH format 0 or short PUCCH format 2 is 1 or 2. Since the number of OFDM symbols corresponding to the above PUCCH format is small, it is convenient to implement PUCCH feedback in the same slot. For example, after receiving the PDSCH, the terminal device can send HARQ-ACK through the above PUCCH format in the slot corresponding to the PDSCH. This can reduce the feedback delay of the terminal device to send uplink control information (uplink control information, UCI), and further assist the network device to more quickly implement subsequent data transmission control based on the feedback information.

[0258] Optionally, the fourth capability set may also include that the terminal device supports PDSCH mapping type B and / or PUSCH mapping type B. PDSCH mapping type B means that PDSCH can start transmission from any symbol within a slot, without having to start transmission in a certain time window within a slot. The time window may be, for example, from the 1st OFDM symbol to the 4th OFDM symbol included in a time slot. In this way, when the network device transmits PDSCH to the terminal device, it does not need to wait until a fixed time window, but can start transmission of PDSCH at any OFDM symbol position within a time slot according to PDSCH mapping type B, thereby reducing the processing delay of the terminal device. For PUSCH mapping type B, please refer to the above description of PDSCH mapping type B, which will not be repeated here. Furthermore, in order to reduce the detection / reception complexity of the terminal device under PDSCH mapping type B or PUSCH mapping type B, the number of OFDM symbols for data scheduling supported by the terminal device under mapping type B can be fixed. For example, the number of OFDM symbols for data scheduling can belong to the set {2, 4, 7} or the set {1, 2, 4, 7}.

[0259] In addition, the fourth capability set may also include that the terminal device supports PDSCH mapping type A and / or PUSCH mapping type A. PDSCH mapping type A is used to characterize that the starting position of PDSCH data mapping is within a fixed time window within 1 slot, and PUSCH mapping type A is used to characterize that the revelation position of PUSCH data mapping is within a fixed time window within 1 slot. In one possible implementation, the terminal device may use data channel (PDSCH and / or PUSCH) mapping type B as a mandatory capability and data channel (PDSCH and / or PUSCH) mapping type A as an optional capability. In another possible implementation, the terminal device may use both data channel (PDSCH and / or PUSCH) mapping types A and B as mandatory capabilities.

[0260] The fifth capability set is used to characterize the small data transmission capability and / or inactive data transmission capability of the terminal device. The terminal device has the fifth capability set, which can characterize that the terminal device has small data transmission / inactive data transmission capability, which is particularly suitable for small packets (small data packets) and infrequent data transmission scenarios. Through the small data / inactive data data transmission method, after the terminal device enters the active state, it can directly perform data transmission in the inactive state, saving user plane delay, and because the process of the terminal device initiating the RRC connection to enter the active state is omitted, the energy consumption of the terminal device can also be reduced. The fifth capability set may include at least one of the following: the terminal device supports the two-step random access (2-stepRACH (random access channel)) transmission method, the terminal device supports the four-step random access (4-step RACH) transmission method, the terminal device supports the early data transmission method (EDT) or the terminal device supports the preconfigured uplink resource (PUR) transmission method.

[0261] The sixth capability set is used to characterize the transmission reliability capability of the terminal device, and the sixth capability set may also be referred to as the transmission reliability capability set. The sixth capability set includes at least one of the following: the terminal device supports a data transmission mode based on a single PDCCH receiving multiple transmission reception points (multiple TRP (transmission reception point, multi-TRP), the terminal device supports the time domain resources corresponding to the PDCCH to be greater than 3 OFDM symbols, the terminal device supports repeated transmission of the PUSCH or the terminal device supports repeated transmission of the PDSCH, the terminal device supports PDCCH transmission with a high aggregation level (aggregation level, AL) (for example, the terminal device supports PDCCH transmission with AL=16), or the terminal device supports a modulation coding scheme cell radio network temporary indentifier (MCS-C-RNTI) table corresponding to a block error ratio (BLER) of 1e-5 (10 to the negative fifth power).

[0262] For example, in the NR industrial internet of things (IIOT) network, in order to provide better services, multiple TRPs are often deployed, that is, a multi-TRP data transmission method is adopted. In multi-TRP transmission, the terminal device can use the data transmission method based on a single PDCCH to receive multiple TRPs as a mandatory capability to reduce the implementation complexity of the terminal device. The data transmission method based on a single PDCCH to receive multiple TRPs means that one TRP sends PDCCH to the terminal device, and multiple TRPs send PDSCH to the terminal device. This collaborative transmission mechanism can reduce interference between different TRPs. Multiple TRPs sending PDSCH to the terminal device can be implemented in the following ways: spatial division multiplexing (SDM), frequency division multiplexing (FDM) or time division multiplexing (TDM). Optionally, under multi-TRP transmission, the terminal device supports indicating two TCI states through a transmission configuration indicator (TCI); the terminal device supports DMRS entry as {0,2}, and the DMRS entry belongs to two different code division multiplexing (CDM) groups (CDM groups), and the two different CDM groups are not used for data transmission. Optionally, the terminal device can support DMRS entry as {0,2}, and the DMRS entry belongs to two CDM groups out of three different CDM groups to implement DMRS power boost transmission mode and ensure the transmission performance of the terminal device. The terminal device can also support two default type D quasi-collocation (QCL) information. Optionally, the terminal device can use SDM and / or FDM data transmission mode based on single PDCCH multi-TRP as a mandatory capability, and TDM data transmission mode based on single PDCCH multi-TRP as an optional capability to reduce the delay of data transmission.

[0263] The terminal device supports repeated transmission of PUSCH, which can be understood as the terminal device supports PUSCH slot aggregation. The number of times the terminal device supports repeated transmission of PUSCH can be represented by the number of slot aggregations, and the number of slot aggregations can be, for example, 4, 6 or 8. The terminal device supports repeated transmission of PDSCH, which can refer to the relevant description of the terminal device supporting repeated transmission of PUSCH, and will not be repeated here.

[0264] The terminal device supports PDCCH transmission at a high aggregation level, which can ensure the reliability of data transmission of the terminal device. This is because the higher the PDCCH aggregation level, the higher the PDCCH transmission reliability.

[0265] The terminal device supports the MCS-C-RNTI table corresponding to the BLER of 1e-5, which can be understood as the terminal device supports data transmission based on the target BLER of 1e-5, and / or the terminal device supports channel quality indicator (CQI) reporting based on the target BLER of 1e-5. The terminal device supports data transmission and / or CQI reporting with a target BLER of 1e-5, which can assist the network device in adaptive data scheduling and ensure that the highest target BLER of data transmission between the terminal device and the network device is 1e-5.

[0266] The seventh capability set is used to characterize the URLLC data transmission capability of the terminal device. The seventh capability set may include at least one of the following: Type 1 grant free data transmission capability, Type 2 grant free data transmission capability, downlink SPS data transmission capability, non-slot (micro-slot) based PUSCH data transmission capability, non-slot (micro-slot) based PDSCH data transmission capability, data transmission capability based on short PUCCH format 0 / 2, PDSCH slot aggregation, PUSCH slot aggregation, PDCCH transmission with aggregation level 16, MCS-C-RNTI table with target BLER of 1e-5, intra-UE uplink transmission priority processing capability, uplink transmission includes PUSCH and PUCCH transmission. The seventh capability set may also include: PDSCH processing capability or PUSCH processing capability, etc.

[0267] Among them, the intra-UE uplink transmission priority processing capability is used to characterize the transmission mode associated with different uplink transmission priorities supported by the terminal device. For example, the terminal device can support the reception of downlink control information including a priority indication field, and the priority indication field can indicate the priority of different data transmission channels scheduled by the downlink control information. According to the control information indication, the terminal device can distinguish the priorities of different data transmission channels, realize the priority transmission of data channels with high priority, and thus ensure the data transmission requirements.

[0268] Optionally, since the URLLC data transmission capability of the terminal device is associated with the reliability and short-delay processing capability of the terminal device, the seventh capability set may also include some or all of the capability features in the fourth capability set and / or the sixth capability set.

[0269] In one possible design, some capability parameters in different capability sets can be combined separately into another capability set, or the capability parameters in capability set A can be included in capability set B, and different capability sets can also be merged into one capability set. In one possible design, part or all of the capability features of any capability set or multiple capability sets from the second to the seventh capability sets can form a new capability set. For example, the terminal device in the sixth capability set supports the data transmission mode based on single PDCCH reception of multi-TRP and the terminal device in the fifth capability set supports small data / inactive data and other capability features can form a shared (fused) IIOT capability set. This is because the data transmission mode based on single PDCCH reception of multi-TRP and capability features such as small data / inactive data can characterize the transmission characteristics of the terminal device supporting the IIOT network.

[0270] In one possible design, the capability features included in any of the above capability sets may also appear in another capability set. For example, the fifth capability set is used to characterize that the terminal device has the ability to transmit small data / inactive data. Since some of the capability features in this set can reduce the power consumption of the terminal device, one or more capability parameters in this capability set may also be included in the second capability set. Since some of the capability features included in the fifth capability set can also reduce user plane latency, the capability parameters corresponding to these some capability features may also be included in the fourth capability set.

[0271] It should be noted that the capability features included in the first capability set to the seventh capability set may be predefined by the protocol, or may be reported by the terminal device, which is not limited here.

[0272] In a possible design, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set in the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. That is, in addition to indicating (explicitly indicating / implicitly indicating) the first capability set, the first information can also indicate at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. At this time, it can be considered that the multiple capability sets indicated by the first information are all mandatory capability sets. Alternatively, in addition to indicating the first capability set, the first information can also indicate at least one capability feature of at least one capability set in the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. That is, the content indicated by the first information corresponds to the mandatory capability set or mandatory capability parameter of the first type of terminal device. After the network device receives the first information from the terminal device, it can determine, based on the first information, that the terminal device is a first type terminal device, that is, the terminal device is a type of terminal device with reduced capabilities. Since the terminal device belongs to the first type terminal device, the network device can directly determine some capability parameters of the terminal device according to its device type, such as its bandwidth parameters and antenna parameters, etc., that is, the first information not only indicates that the terminal device is of the first type, but also implicitly indicates its first capability set by indicating its type.

[0273] In another possible design, the terminal device sends a second information to the network device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set. That is, the first information only indicates the first capability set, and the second information indicates at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. It can be considered that the first capability set indicated by the first information is a mandatory capability set, and the other capability sets are independently implemented by each terminal manufacturer, and therefore are reported through the second information. The capability set indicated by the second information is an optional capability set, or the capability set indicated by the second information may also be a mandatory capability set.

[0274] It can be understood that if the first information does not indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set from the second capability set to the seventh capability set, the second information may indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set from the second capability set to the seventh capability set; or, if the first information has indicated that the capability parameters corresponding to the first type of terminal device include at least one capability set from the second capability set to the seventh capability set, the at least one capability set already indicated by the first information does not need to be indicated by the second information; or, if the first information has indicated that the capability parameters corresponding to the first type of terminal device include at least one capability feature in at least one capability set from the second capability set to the seventh capability set, the at least one capability feature does not need to be indicated by the second information; or, if the first information does not indicate that the capability parameters corresponding to the first type of terminal device include at least one capability parameter in at least one capability set from the second capability set to the seventh capability set, the at least one capability parameter may be indicated by the second information. In other words, the contents indicated by the first information and the second information may not be repeated.

[0275] Among them, the second information and the first information can be two pieces of information, and the content or format of the second information and the first information can be the same or different. The first information and the second information can be reported in time division, for example, reported at different times, or reported in different access stages, such as the first information is sent in the initial access stage, and the second information is sent in the connection state. That is, the terminal device can send the first information in the initial access stage and send the second information in the connection state. For example, the first information can be carried in message (message, MSG) 3 or MSGA, that is, it is sent through the uplink channel in the initial access process in the initial access stage, and the second information can be carried in PUSCH or PUCCH after the terminal device establishes an RRC connection with the network device. In other words, the capability information related to the initial access configuration parameters (such as the first capability set, including the bandwidth and transceiver antennas of the terminal device, etc.) can be sent in the initial access stage, and the capability information related to data transmission after entering the RRC connection (such as the second capability set, etc.) can be reported in the RRC connection state.

[0276] For another example, in one implementation, the first capability set includes both 1T2R and 1T1R; or 1T2R and 1T1R may be reported in the form of other capability parameters; or 1T2R and 1T1R may be included in other capability sets. When reported in the form of capability sets, 1T2R and 1T1R may be included in the same capability set or in different capability sets. In order to facilitate the network device to control the type of terminal devices accessed and ensure the flexibility of network device implementation, a terminal device (such as a REDCAP terminal device) having the first capability set sends first information to the network device through an uplink channel in the initial access process during the initial access phase, indicating its own terminal device type, i.e., a REDCAP terminal device. For example, it may be reported through a preamble. When the network device learns that the terminal device that performs a random access response is a REDCAP terminal device, it may consider whether to allow this type of terminal device to access the network. For example, the network device may notify this type of terminal device whether it can access through a random access response (RAR) corresponding to Msg2 or MsgB in the random access process. If this type of terminal device does not receive a response to the preamble sent by itself within a certain time window, it can be determined that the network device does not allow this type of terminal device to access. Or on the other hand, the network device can also notify the cell whether it supports the access of REDCAP terminal devices in the public information broadcast by the cell (public information such as information carried in the MIB or SIB). Furthermore, regardless of whether the terminal device has the capability of 1T2R or 1T1R, it is defined as a type of REDCAP terminal device. The terminal device can report in the Msg 3 stage of random access or MsgA or in the connected state, that is, information indicating different receiving capabilities (such as 1T2RREDCAP and 1T1RREDCAP) corresponding to the same type of terminal devices. The terminal device can report at different stages of data transmission between the terminal device and the network device. For example, it can report at the stage of sending preamble during initial access and at the stage of sending Msg3 or sending MsgB during initial access. This can not only simplify the type definition of REDCAP terminal devices, but also allow network devices to distinguish REDCAP terminal devices with different capabilities, thereby making REDCAP terminal devices with different capabilities manageable, ensuring network performance and data transmission efficiency, and optimizing network design.Alternatively, taking 1T2R and 1T1R as examples, considering that the number of receiving antennas of 1T1R terminal devices is reduced compared to 1T2R terminal devices, when other data transmission performance parameters (such as modulation mode, channel bandwidth capability, etc.) are the same, the receiving powers of the same signal received by terminal devices with different receiving antenna configurations are different. For example, the receiving power of SSB or other reference signals received by 1R terminal devices (terminal devices configured with 1 receiving antenna) is lower than the receiving power of SSB or other reference signals received by 2R terminal devices (terminal devices configured with 2 receiving antennas). If different receiving powers of SSB or other reference signals can correspond to different random access resources such as preamble resources, then even if there is only one type of REDCAP terminal device, different preambbles can be sent during random access to enable the network device to obtain whether the random access response is initiated by a REDCAP terminal device with a receiving antenna capability of 1R or a REDCAP terminal device with a receiving antenna capability of 2R.

[0277] In another possible design, the terminal device sends third information to the network device; the third information is used to indicate the application scenario (use case) of the terminal device. It should be noted that the terminal device is a first type of terminal device, that is, the third information is used to indicate some application scenarios that the first type of terminal device may apply. The application scenario of the terminal device has an association relationship with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. The association relationship may be predefined, that is, both the base station and the terminal device know the association relationship; or, the association relationship may be sent by the base station to the terminal device, and the terminal device may report its application scenario according to the association relationship indicated by the base station; or, the association relationship may be reported by the terminal device to the base station, and the base station determines the corresponding capability set according to the scenario and association relationship reported by the terminal device. That is, the first information indicates the first capability set, and the third information implicitly indicates at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set.

[0278] For example, as shown in Table 4, it is a schematic diagram of the association relationship between different application scenarios and different capability sets.

[0279] Table 4

[0280] Application Scenario At least one capability set associated with the application scenario IWSN The second capability set, the fourth capability set, the fifth capability set, and the seventh capability set Video surveillance The third and sixth capability sets Wearable Second capability set and third capability set

[0281] It can be seen from Table 4 that when the application scenario of the terminal device is an IWSN scenario, the application scenario of the terminal device is associated with the second capability set, the fourth capability set, the fifth capability set, and the seventh capability set. When the application scenario of the terminal device is a video surveillance scenario, the application scenario of the terminal device is associated with the third capability set and the sixth capability set. When the application scenario of the terminal device is a wearable scenario, the application scenario of the terminal device is associated with the second capability set and the third capability set.

[0282] In addition, the capability features included in the first capability set corresponding to different application scenarios may also be different. For example, the channel bandwidth supported by the terminal device included in the first capability set corresponding to the IWSN scenario may be 5MHz or 10MHz, and the number of receiving antennas and the number of transmitting antennas may be 1 for receiving and 1 for transmitting, which can further reduce the cost and implementation complexity of the IWSN and meet the low data rate requirements of the IWSN; while the channel bandwidth supported by the terminal device included in the first capability set corresponding to the wearable scenario may be 20MHz or 50MHz, and the number of receiving antennas and the number of transmitting antennas may be 2 for receiving and 2 for transmitting, which can achieve a higher data transmission rate.

[0283] In this way, the first type of terminal device can be associated with different capability sets by reporting its own application scenarios, assisting network devices to achieve adaptive data transmission, and meeting the needs of different application scenarios.

[0284] In addition, in the absence of a defined capability set, different application scenarios can be associated with different capability parameters or different capability features. An application scenario can be associated with one or more capability parameters or capability features. For example, a video surveillance scenario can be associated with at least one of the following capability features: the maximum number of DCIs of different DCI sizes supported by the terminal device is less than 4, the terminal device supports cross-slot scheduling, the terminal device supports receiving WUS or the terminal device supports relaxation of neighboring cell RRM measurements, the terminal device supports SUL, the terminal device supports PDCCH repeated transmission, the terminal device supports the time domain resources corresponding to PDCCH to be greater than 3 OFDM symbols, the terminal device supports virtual carriers or the terminal device supports BWP switching delay not greater than the RF retuning time. In this way, the first type of terminal device can be associated with different capability parameters or capability features by reporting its own application scenario, assisting the network device to achieve adaptive data transmission, and meeting the needs of different application scenarios.

[0285] In other embodiments, the capability parameters corresponding to the terminal device may also include at least one of the following: a capability set for an IWSN scenario, a capability set for a wearable scenario, or a capability set for a video surveillance scenario.

[0286] Among them, the capability set for the IWSN scenario includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device, the terminal device supports cross-time slot scheduling, the terminal device supports uplink data transmission based on micro-time slots, the terminal device supports downlink data transmission based on micro-time slots, the terminal device supports unlicensed uplink data transmission, the terminal device supports unlicensed downlink data transmission, the terminal device supports two-step random access transmission mode, the terminal device supports four-step random access (4-step RACH) transmission mode, the terminal device supports EDT transmission mode or the terminal device supports PUR transmission mode.

[0287] The capability set for wearable scenarios includes at least one of the following: the terminal device supports SUL, the terminal device supports repeated transmission of PDCCH, the terminal device supports the time domain resources corresponding to PDCCH greater than 3 OFDM symbols, the terminal device supports virtual carriers, the terminal device supports BWP switching delay not greater than the RF retuning time, the terminal device supports data transmission based on a single PDCCH to receive multiple TRPs, the terminal device supports the time domain resources corresponding to PDCCH greater than 3 OFDM symbols, the terminal device supports repeated transmission of PUSCH or the terminal device supports repeated transmission of PDSCH.

[0288] The capability set for video surveillance scenarios includes at least one of the following: the maximum number of DCIs of different DCI sizes supported by the terminal device is less than 4, the terminal device supports cross-slot scheduling, the terminal device supports receiving WUS or the terminal device supports relaxation of neighboring cell RRM measurements, the terminal device supports SUL, the terminal device supports PDCCH repeated transmission, the terminal device supports the time domain resources corresponding to PDCCH greater than 3 OFDM symbols, the terminal device supports virtual carriers or the terminal device supports BWP switching delay not greater than the RF retuning time.

[0289] In one possible design, the first information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one of a capability set for an IWSN scenario, a capability set for a wearable scenario, or a capability set for a video surveillance scenario. That is, in addition to indicating (explicitly indicating / implicitly indicating) the first capability set, the first information can also indicate at least one of a capability set for an IWSN scenario, a capability set for a wearable scenario, or a capability set for a video surveillance scenario. At this point, it can be considered that the multiple capability sets indicated by the first information are all mandatory capability sets.

[0290] In another possible design, the terminal device sends a second information to the network device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one of a capability set for an IWSN scenario, a capability set for a wearable scenario, or a capability set for a video surveillance scenario. That is, the first information only indicates the first capability set, and the second information indicates at least one of a capability set for an IWSN scenario, a capability set for a wearable scenario, or a capability set for a video surveillance scenario. It can be considered that the first capability set indicated by the first information is a mandatory capability set, and other capability sets are independently implemented by each terminal manufacturer, and therefore are reported through the second information. The capability set indicated by the second information can be an optional capability set or a mandatory capability set.

[0291] In some other embodiments, the capability parameters corresponding to the terminal device may also include a capability set corresponding to uplink transmission and / or a capability set corresponding to uplink transmission. That is to say, different capability sets may be defined for uplink data transmission and downlink data transmission, respectively. In this way, for scenarios where uplink services and downlink services are not equal, the implementation of the terminal device may be simplified by separately defining the capability set for each transmission direction. For example, for scenarios with more uplink services and less downlink services (such as video surveillance and IWSN scenarios), the uplink data design may be optimized, that is, the functions supported by the uplink data transmission of the terminal device may be optimized, and the complexity of the downlink data transmission may be simplified, that is, the functions supported by the terminal device in the downlink data transmission may be simplified.

[0292] For example, for uplink data transmission, considering the reliability of data transmission, the terminal device may have the function of New64QAM MCS table for PUSCH, and may not support New 64QAM MCS table for PDSCH for the low demand for downlink data transmission. It should be understood that if the data transmission between the terminal device and the network device is configured according to New64QAM MCS table for PUSCH, a higher data modulation mode such as 256QAM can be achieved, or a lower data transmission BLER can be achieved, for example, BLER can be 1e-5; the New64QAM MCS table for PDSCH has the same understanding and will not be elaborated. Furthermore, the terminal device may support the function of Dynamic indication of MCS tables using MCS-C-RNTI for PUSCH, but not support the function of Dynamic indication of MCS tables using MCS-C-RNTI for PDSCH. It should be understood that if the terminal device supports the function of Dynamic indication of MCS tables using MCS-C-RNTI for PUSCH, the MCS value corresponding to the PUSCH transmission can be dynamically switched in different MCS tables, so that the data transmission between the network device and the terminal device can adapt to the channel status between the two more quickly and improve the data transmission rate. For PDSCH, the terminal device may not support this function due to the small downlink data transmission volume requirement. In addition, in terms of latency, the terminal device may only support the uplink configured grant function, but not the DL configured grant or semi-persistent scheduling function.

[0293] In some other embodiments, the capability parameters corresponding to the terminal device may also include capability sets corresponding to different data transmission standards. For example, the capability sets corresponding to FDD and TDD may be defined separately, so that different data transmissions can be adapted. Compared with TDD, the uplink frequency resources of FDD are not affected by the uplink and downlink ratio of TDD, so the uplink transmission rate, such as the peak rate that the terminal device can achieve, can be guaranteed, while the TDD system is limited by the uplink and downlink ratio of TDD, and the uplink transmission resources are limited, which in turn affects the uplink data transmission rate of the terminal device. Therefore, only the capability features related to the data transmission rate / coverage performance may be considered in the TDD system, while the capability features related to the data transmission rate / coverage performance may not be considered in the FDD system, or the capability features related to the data transmission rate / coverage performance may be used as optional capabilities. For example, the terminal device may only support the SUL function under the TDD band.

[0294] In one possible implementation, the terminal device also includes at least one of the following capabilities: the terminal device supports separated public signaling data transmission, the terminal device supports high-precision synchronization function, the terminal device supports network slicing data transmission, the terminal device supports NPN data transmission, the terminal device supports 5G LAN data transmission, the terminal device supports UTDOA positioning, or the terminal device supports multicast / broadcast data transmission. Optionally, the terminal device may also support data transmission features based on 5G quality of service identifier (5G QoS Identifier) ​​pre-scheduling. 5QI can identify service priority, data packet transmission delay, or data packet transmission bit error rate, etc. The terminal device may support data transmission features of a specific 5QI.

[0295] In a possible design, it can be considered that the capability parameters corresponding to the first type of terminal device can also include an IIOT capability set, and the IIOT capability set can include the terminal device supporting separation of public signaling data transmission, the terminal device supporting high-precision synchronization function, the terminal device supporting network slicing data transmission, the terminal device supporting NPN data transmission, the terminal device supporting 5G LAN data transmission, the terminal device supporting UTDOA positioning, or the terminal device supporting multicast / broadcast data transmission, etc. That is, the terminal device can report at least one of the above capabilities separately (for example, the terminal device supports the ability to separate public signaling data transmission function, the terminal device supports the ability to support network slicing data transmission function, etc.), and can also report the above capabilities in the form of an IIOT capability set.

[0296] Among them, the terminal equipment supports separated public signaling data transmission, which can be understood as that the terminal equipment supports data transmission based on separated RACH, separated system information block type 1 (systeminformation block type 1, SIB1), separated paging or separated initial BWP. Among them, separation means that the above-mentioned data of the first type of terminal equipment and the second type of terminal equipment are separated. For example, NR REDCAP UE and NR legacy UE can correspond to their own RACH, SIB1, paging and initial BWP respectively. The terminal equipment supports separated public signaling data transmission, which can reduce the impact on the data transmission of NR traditional terminal equipment in the system. In addition, for NR REDCAP UE, its public signaling design can be simplified, overhead can be saved, and energy saving can be achieved.

[0297] The terminal device supports high-precision synchronization function, which can be understood as the terminal device can receive high-precision timing information sent by the network device and perform time synchronization based on the timing information. For example, the base station can broadcast network timing information with a granularity of 10 nanoseconds to assist scenarios that require full network synchronization, such as power grids and industrial control scenarios, to achieve end-to-end time synchronization errors between devices in the above scenarios of less than 1us. The terminal device supports high-precision synchronization function, which can meet the transmission requirements of high-delay sensitive services.

[0298] The terminal device supports network slicing data transmission, and can continue to transmit with network devices in a dedicated virtual network. The virtual network can adapt to the characteristic needs of the industry or enterprise and expand the application market of the terminal device.

[0299] Terminal devices support NPN data transmission and can transmit data with network devices in the operator's private network. Currently, some large enterprises or enterprises using 5G industrial spectrum hope to build operator private networks to ensure the security and privacy of operations. Terminal devices that support NPN data transmission can transmit data with network devices in networks with operator private network construction needs, expanding the application market of the terminal device.

[0300] Terminal devices supporting 5G LAN can be understood as terminal devices supporting the transmission of Layer 2 protocol data packets in the network. L2 is the industrial protocol layer. Layer 2 protocol data packets mainly refer to MAC data packets, such as Ethernet or EtherCAT data packets. Terminal devices supporting 5G LAN can be directly connected to industrial / power equipment, eliminating the need for L2 TP device transfer, reducing the complexity of terminal device implementation, and improving data transmission efficiency.

[0301] Optionally, the IIOT capability set may also include precise timing transmission capability, which is usually used in scenarios where precise timing is required in IIOT networks. Terminal devices with precise timing transmission capability can serve IIOTs with timing requirements. Optionally, the IIOT capability set may also include the sixth capability set in which the terminal device supports the data transmission mode based on single PDCCH reception of multi-TRP and the fifth capability set in which the terminal device supports small data / inactive data and other capability features.

[0302] Optionally, based on the above capability set, the terminal device can independently report other optional capabilities in the form of features.

[0303] Optionally, in addition to the mandatory capability set indicated by the first information, other capabilities may be independently reported in the form of features.

[0304] Optionally, the mandatory capabilities of the terminal device (or understood as the capability parameters indicated by the first information or understood as the mandatory capabilities associated with the first type of terminal device) may only include: the bandwidth capability of the terminal device, the number of receiving antennas of the terminal device, the number of transmitting antennas of the terminal device, the maximum modulation mode corresponding to the uplink data and / or downlink data transmission and the capability associated with the data transmission delay. Among them, the capabilities associated with the data transmission delay may include at least one of the following: PDSCH processing capability (i.e., PDSCH processing time capability) and / PUSCH processing capability (i.e., PUSCH processing time capability), non-time slot-based data transmission capability and corresponding small / inactive data transmission capability. The parameter values ​​corresponding to each capability can refer to the above description, wherein the corresponding small / inactive data transmission capability (or the capability corresponding to the small / inactive data transmission capability set) includes at least one of the following: the terminal device supports a two-step random access transmission mode, the terminal device supports a four-step random access transmission mode, the terminal device supports an early transmission data transmission mode, the terminal device supports a pre-configured uplink resource transmission mode, or the terminal device supports a configured grant type 1 transmission mode. In combination with the above-mentioned description of the values ​​of each capability parameter or the characteristics of the parameter, the first type of terminal device with the above-mentioned mandatory capabilities has lower costs than the second type of terminal device (such as the NR traditional terminal device) because its channel bandwidth, number of receiving antennas, number of transmitting antennas or one or more capabilities of the maximum modulation method for data transmission are not higher than those of the second type of terminal device. On the other hand, compared with the LTE terminal device, since the first type of terminal device has capabilities related to data transmission delay, the data processing delay is lower, which can improve data transmission efficiency and user experience.

[0305] 502. The network device receives first information from the terminal device.

[0306] After receiving the first information reported by the terminal device, the network device can determine that the terminal device belongs to the first type of terminal device according to the first information, and can determine a corresponding capability set, such as the first capability set. For the description of the first information, please refer to the description in step 501, which will not be repeated here.

[0307] Optionally, the network device may also receive second information reported by the terminal device, and may determine, based on the second information, that the capability parameter corresponding to the first type of terminal device also includes at least one capability set of a second capability set, a third capability set, a fourth capability set, a fifth capability set, a sixth capability set, or a seventh capability set. For a description of the second information, reference may be made to the description in step 501, which will not be repeated here.

[0308] Optionally, the network device may also receive third information reported by the terminal device, and the application scenario of the terminal device may be determined according to the third information. The application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set, or the seventh capability set. For the description of the third information, please refer to the description in step 501, which will not be repeated here.

[0309] Based on the method provided in the embodiment of the present application, the terminal device can send first information to the network device, the first information is used to indicate that the terminal device belongs to the first type of terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set includes the channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4. In this way, the terminal device can report its own type to the network device so that the network device determines the capability parameters corresponding to the terminal device according to the type of the terminal device, which can reduce the resource overhead of the terminal device reporting the capability.

[0310] Moreover, in the embodiment of the present application, a type of terminal device (a first type of terminal device, i.e., a REDCAP terminal device) may correspond to different capability sets, and different capability sets may be associated with different data transmission characteristics. For example, the first capability set may be related to the complexity / cost of the terminal device, the second capability set may be related to the power saving capability of the terminal device; the third capability set may be related to the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; the fourth capability set may be related to the short-delay processing capability of the terminal device; the fifth capability set may be related to the small data transmission capability and / or inactive data transmission capability of the terminal device; the sixth capability set may be related to the transmission reliability capability of the terminal device; the seventh capability set may be related to the URLLC data transmission capability of the terminal device, etc. That is, the capability set of the first type of terminal device may be defined according to different data transmission requirements, and different requirements for energy saving, coverage, and data transmission rate may be met in different scenarios, so that the terminal device manufacturer may realize the corresponding performance and functions of the first type of terminal device according to different requirements in different application scenarios, without having to design a variety of different types of terminal devices according to different data transmission characteristics, and may avoid market fragmentation caused by too many types of terminal devices and difficulty in management.

[0311] Optionally, the terminal device may send fourth information to the network device, the fourth information indicating the first parameter f1, the maximum downlink data rate of the terminal device corresponding to f1 is not higher than X Mbps, and X may be 150 or 10. In other words, the fourth information is used to indicate the maximum downlink data rate of the terminal device, and the maximum downlink data rate of the terminal device is less than or equal to 10 or 150 Mbps. Optionally, the terminal device may send fifth information to the network device, the fifth information indicating the second parameter f2, the maximum uplink data rate of the terminal device corresponding to f2 is not higher than Y Mbps, and Y may be 50 or 5. In other words, the fourth information is used to indicate that the maximum uplink data rate of the terminal device is not higher than Y Mbps, and Y may be 50 or 5.

[0312] In one possible design, the fourth information may directly indicate f1. In another possible design, the fourth information may not directly indicate f1, and the fourth information may carry one or more bits, and the value of the bit corresponds to the value of f1. For example, the value of every 2 bits may correspond to a value of f1, and 00 01 10 11 may respectively indicate four f1s. In this way, the maximum downlink data rate corresponding to the terminal device may be implicitly reported by reporting one or more bits. Similarly, the fifth information may directly carry f2. In another possible design, the fifth information may not directly indicate f2. The fifth information may carry one or more bits, and the value of the bit corresponds to the value of f2. In this way, the maximum uplink data rate corresponding to the terminal device may be implicitly reported by reporting one or more bits.

[0313] It should be noted that the fourth information or the fifth information may also be referred to as a scaling factor (scalingfacotr). For example, the fourth information may be referred to as a downlink (DL) scalingfacotr, and the fifth information may be referred to as an uplink (UL) scalingfacotr. Alternatively, the fourth information or the fifth information may also have other names, which are not limited in this application.

[0314] Through the above manner, on the one hand, it can be achieved that even if there is only one type of terminal device in the network (for example, a REDCAP terminal device), the fourth information or the fifth information corresponds to different data transmission rates, thereby meeting the data transmission efficiency in different application scenarios; on the other hand, it can be achieved that even if the terminal devices correspond to the same type, the different data rates that the same type of terminal devices can support can be indicated by reporting the fourth information and / or the fifth information, thereby achieving the distinction between different rates of the terminal devices; on the other hand, it can also be achieved that different types of terminal devices can be distinguished by reporting different fourth information and / or fifth information.

[0315] The present application can support the low data transmission rate requirements of REDCAP terminal devices by introducing the fourth information and / or the fifth information. Even if there is only one type of REDCAP terminal device, the implementation of the present application can support the lower uplink and downlink maximum data rates corresponding to the currently identified application scenario. In addition, through this implementation, when there is only one type of REDCAP terminal device, different maximum data rates corresponding to one type of REDCAP terminal device can be achieved through different fourth information and / or fifth information, which simplifies the type definition of REDCAP terminal devices, avoids differentiation of REDCAP terminal device types, and contributes to the development of the REDCAP terminal device market.

[0316] Taking REDCAP terminal devices as an example, the maximum data rates corresponding to REDCAP terminal devices defined by the current standards include: DL maximum data rate is 150Mbps or 10Mbps, and UL maximum data rate is 50Mbps or 5Mbps. Alternatively, it can also be understood that: the maximum data rate corresponding to REDCAP terminal devices is: DL maximum data rate is 150Mbps and UL maximum data rate is 10Mbps; or, the maximum data rate corresponding to REDCAP terminal devices is: DL maximum data rate is 50Mbps and UL maximum data rate is 5Mbps.

[0317] Currently in the NR system, the maximum data rate that the terminal device can support can be determined based on the following parameters: the number of carriers for simultaneous data transmission that the terminal device can support; the maximum data transmission modulation mode (QAM) that the terminal device can support; the number of layers of simultaneous data transmission that the terminal device can support; the maximum channel transmission bandwidth that the terminal device can support on different carriers (if the terminal device supports a carrier for data transmission, then the bandwidth of the carrier is the maximum channel transmission bandwidth that the terminal device can support); the scaling factor (scaling factor) reported by the terminal device; the data transmission overhead corresponding to different frequency ranges (FR). For the maximum data rate of uplink data, it can be determined by the above parameters related to uplink data transmission, such as the maximum uplink data transmission modulation mode supported by the terminal device, the number of layers of simultaneous uplink data transmission that the terminal device can support, and the uplink data transmission overhead corresponding to the terminal device in different frequency ranges; for the maximum data rate of downlink data, it can be determined by the above parameters related to downlink data transmission, such as the maximum downlink data transmission modulation mode supported by the terminal device, the number of layers of simultaneous downlink data transmission that the terminal device can support, and the downlink data transmission overhead corresponding to the terminal device in different frequency ranges.

[0318] Exemplarily, the maximum data rate (in Mbps) supported by the terminal device can be calculated by formula 1':

[0319]

[0320] Among them, X refers to the maximum downlink data rate, Y refers to the maximum uplink data rate, J represents the number of aggregated carriers that the terminal device can support in a frequency band or a frequency band combination, the value of Rmax is 948 / 1024, v represents the maximum number of transmission layers (uplink or downlink) that the terminal device can support, Q represents the maximum modulation order (uplink or downlink) that the terminal device can support, f is the scaling factor, and its value can be one of the following values: {1, 0.8, 0.75, 0.4}, u represents the system parameter, T represents the average OFDM symbol length in 1 subframe, and T is different for different u, and N represents the maximum number of resource blocks corresponding to the channel bandwidth of the terminal device, and N is different for different u. OH represents overhead. When the center frequency is not higher than frequency range 1 (FR1) of 6 GHz, OH=0.14 for the maximum downlink data rate and OH=0.08 for the maximum uplink data rate. When the center frequency is higher than frequency range 2 (FR2) of 6 GHz, OH=0.18 for the maximum downlink data rate and OH=0.10 for the maximum uplink data rate.

[0321] Currently, the values ​​corresponding to scalingfactor only include {1, 0.8, 0.75, and 0.4}. Combined with other configurations of the REDCAP terminal device (such as the capability parameters included in the first capability set in this application), it is impossible to achieve the data transmission rate requirements of the REDCAP terminal device in specific application scenarios, especially the requirements for low data transmission rates, such as the DL maximum data rate of 10Mbps and / or the uplink maximum data rate of 5Mbps.

[0322] In this embodiment, according to the above formula 1', combined with the features included in the mandatory capability set (first capability set) corresponding to the REDCAP terminal device, the formula 1' can be simplified to calculate different fourth information and / or fifth information to achieve the support of the REDCAP terminal device for low data transmission rate. Considering the cost of the REDCAP terminal device, the REDCAP terminal device may not support the carrier aggregation function, that is, J=1 in the formula 1'.

[0323] In one possible design, when the capability parameters included in the first capability set are different, the values ​​of the fourth information and the fifth information may be different. As described below, if (1) is satisfied, the value of the fourth information may be obtained based on (1-a), (1-b) or (1-c), respectively. If (2) is satisfied, the value of the fourth information may be obtained based on (2-a), (2-b) or (2-c), respectively. If (3) is satisfied, the value of the fifth information may be obtained based on (3-a), (3-b) or (3-c), respectively. If (4) is satisfied, the value of the fifth information may be obtained based on (4-a), (4-b) or (4-c), respectively.

[0324] (1) The number of receiving antennas of the terminal device is 2, the channel bandwidth is 20 MHz, and the maximum modulation mode of downlink data transmission is 64QAM. Optionally, the number of transmitting antennas of the terminal device is 1, and the maximum modulation mode of uplink data transmission is 64QAM or 16QAM.

[0325] (1-a) In the FDD frequency band, the fourth information is equal to the result calculated by formula 1, or the fourth information is the value of the result calculated by formula 1 after rounding off to a preset number of digits. Formula 1 is:

[0326] f1=X·10 6 / ((1-OH)·(N·12 / T)·2·6·R) (Formula 1)

[0327] In formula 1, X is the maximum downlink data rate, and the description of other parameters can refer to the description of formula 1', which will not be repeated here. Among them, the values ​​of N and T are shown in Table 5:

[0328] Table 5

[0329] SCS N T 15KHz 106 10^(-3) / (14*1) 30KHz 51 10^(-3) / (14*2) 60KHz 24 10^(-3) / (14*4)

[0330] According to Formula 1, when the maximum downlink data rate is 10 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz respectively, an implementation method of the fourth information value may be as shown in Table 6:

[0331] Table 6

[0332]

[0333] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 may be a value in the range of 0.06 to 0.07, or a value in the range of 0.06 to 0.10, or 0.06, or 0.07, or 0.10.

[0334] According to Formula 1, when the maximum downlink data rate is 150 Mbps, and the SCS is 15 KHz, 30 KHz, or 60 KHz, an implementation method of the fourth information value may be as shown in Table 7:

[0335] Table 7

[0336]

[0337] Alternatively, when the maximum downlink data rate supported by the terminal device is 150 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1=0.95.

[0338] Alternatively, for a REDCAP terminal device, two f1s may be reported, one f1 corresponding to a low downlink maximum data rate (eg, 10 Mbps) and the other f1 corresponding to a high downlink maximum data rate (eg, 150 Mbps), and the f1 corresponding to the high downlink maximum data rate may be 1.0.

[0339] (1-b) In a TDD frequency band where the ratio of downlink DL to uplink UL is 7:3, the fourth information is equal to the result calculated by formula 2, or the fourth information is the value of the result calculated by formula 2 after rounding off to a preset number of bits. Formula 2 is:

[0340] f1=X·10 6 / ((1-OH)·(N·12 / T)·2·6·R·(DL ratio)) (Formula 2)

[0341] In formula 2, DL ratio represents the proportion of DL symbols occupied or the proportion of DL time slots (or DL ​​subframes) occupied in a TDD DL-UL cycle. In a TDD band with a DL:UL configuration of 7:3, DL ratio can be 7 / 10. For example, a TDD band with a center frequency of 4 GHz or a TDD band with a center frequency of 3.5 GHz corresponds to a typical DL:UL configuration of 7:3. The other parameter descriptions are the same as above and are not repeated here.

[0342] For a TDD frequency band, if the TDD uplink and downlink ratio on the frequency band is different from the above TDD uplink and downlink ratio, the fourth information may be recalculated according to a relevant formula (eg, Formula 2).

[0343] According to Formula 2, when the maximum downlink data rate is 10 Mbps, and the SCS is 15 KHz, 30 KHz, or 60 KHz, an implementation of the fourth value may be as shown in Table 8:

[0344] Table 8

[0345]

[0346] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 can be 0.09 or 0.095 or 0.10.

[0347] Optionally, in a TDD frequency band with a DL:UL ratio of 7:3, the maximum downlink data rate corresponding to f1=1.0 may be the maximum downlink data rate corresponding to f1=1.0 in an FDD system multiplied by (7 / 10).

[0348] (1-c) In a TDD frequency band where the ratio of downlink DL to uplink UL is 8:2, the fourth information is equal to the result calculated by formula 3, or the fourth information is the value of the result calculated by formula 3 after rounding off to a preset number of bits. Formula 3 is:

[0349] f1=X·10 6 / ((1-OH)·(N·12 / T)·2·6·R·(DL ratio)) (Formula 3)

[0350] In the formula, 3, DL ratio represents the proportion of DL symbols or DL ​​time slots (or DL ​​subframes) occupied in a TDD DL-UL cycle. In a TDD band with a DL:UL configuration of 8:2, DL ratio can be 8 / 10. For example, the typical DL:UL configuration corresponding to a TDD band with a center frequency of 2.6 GHz is 8:2. The other parameter descriptions are the same as above and are not repeated here.

[0351] According to Formula 3, when the maximum downlink data rate is 10 Mbps, and the SCS is 15 KHz, 30 KHz, or 60 KHz, an implementation of the fourth value may be as shown in Table 9:

[0352] Table 9

[0353]

[0354] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 may be 0.08 or 0.10.

[0355] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the maximum downlink data rate corresponding to f1=1.0 may be the maximum downlink data rate corresponding to f1=1.0 in an FDD system multiplied by (8 / 10).

[0356] (2) The number of receiving antennas of the terminal device is 1, the channel bandwidth is 20 MHz, and the maximum modulation mode of downlink data transmission is 64QAM. Optionally, the number of transmitting antennas of the terminal device is 1, and the maximum modulation mode of uplink data transmission is 64QAM or 16QAM.

[0357] (2-a) In the FDD frequency band, the fourth information is equal to the result calculated by formula 4, or the fourth information is the value of the result calculated by formula 4 after rounding off to a preset number of digits. Formula 4 is:

[0358] f1=X·10 6 / ((1-OH)·(N·12 / T)·1·6·R) (Formula 4)

[0359] In formula 4, the description of each parameter can be found above and will not be repeated here.

[0360] According to Formula 4, when the maximum downlink data rate is 10 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz respectively, an implementation method of the fourth information value may be as shown in Table 10:

[0361] Table 10

[0362]

[0363] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 may be 0.15 or 0.20.

[0364] According to Formula 4, in the FDD band, the maximum downlink data rate corresponding to f1=1 is between 75Mbps and 85Mbps. To simplify the representation, it can be considered that in the FDD band, for different SCSs, the maximum downlink data rate corresponding to the scaling factor is 80Mbps.

[0365] (2-b) In a TDD frequency band where the DL to UL ratio is 7:3, the fourth information is equal to the result calculated by formula 5, or the fourth information is the value of the result calculated by formula 5 after rounding off to a preset number of bits. Formula 5 is:

[0366] f1=X·10 6 / ((1-OH)·(N·12 / T)·1·6·R·(DL ratio)), (Formula 5)

[0367] The DL ratio may be 7 / 10, and other parameters are the same as described above and will not be described in detail.

[0368] According to Formula 5, when the maximum downlink data rate is 10 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz respectively, an implementation method of the fourth information value may be as shown in Table 11:

[0369] Table 11

[0370]

[0371] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 may be 0.18 or 0.20.

[0372] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=7:3, the maximum downlink data rate corresponding to f1=1.0 may be the maximum downlink data rate corresponding to f1=1.0 in an FDD system multiplied by (7 / 10).

[0373] (2-c) In a TDD frequency band where the DL to UL ratio is 8:2, the fourth information is equal to the result calculated by Formula 6, or the fourth information is the value of the result calculated by Formula 6 after rounding off to a preset number of bits. Formula 6 is:

[0374] f1=X·10 6 / ((1-OH)·(N·12 / T)·1·6·R·(DL ratio)) (Formula 6)

[0375] The DL ratio may be 8 / 10, and other parameters are the same as described above and will not be described in detail.

[0376] According to Formula 6, when the maximum downlink data rate is 10 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz respectively, an implementation method of the fourth information value may be as shown in Table 12:

[0377] Table 12

[0378]

[0379]

[0380] Alternatively, when the maximum downlink data rate supported by the terminal device is 10 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device may send the same fourth information. For example, when SCS=15 KHz or 30 KHz, f1 may be 0.15 or 0.16 or 0.20.

[0381] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the maximum downlink data rate corresponding to f1=1.0 may be the maximum downlink data rate corresponding to f1=1.0 in an FDD system multiplied by (8 / 10).

[0382] It should be noted that in order to reduce the complexity of the standard implementation, the value of f1 can be 0.1. Although the maximum downlink data rate calculated by substituting f1 into Formula 1 is higher than 10 Mbps, it can still be considered that the maximum downlink data rate corresponding to f1=0.1 is 10 Mbps. Alternatively, it can be understood that if a terminal device with the first capability set such as (1) reports f1=0.1, it means that the maximum downlink data rate supported by the terminal device includes 10 Mbps.

[0383] To simplify the implementation of the terminal device, when the maximum downlink data rate calculated by substituting f1 into Formula 1 fluctuates above or below the target maximum downlink data rate, the target maximum downlink data rate corresponding to the terminal device can still be considered to be 10Mbps.

[0384] It should be noted that the value range corresponding to f1 / f2 in the embodiment of the present application can indicate that the value corresponding to f1 / f2 is greater than or equal to the value on the left side of the value range corresponding to it and less than or equal to the value on the right side of the value range corresponding to it. For example, taking Table 9 as an example, when SCS=30KHz, the value range of f1 is 0.076-0.10, which means that the value of f1 can be greater than or equal to 0.076 and less than or equal to 0.10. These instructions are also valid for other implementations in the embodiment of the present application.

[0385] Exemplarily, when corresponding to different SCSs, f1 is the same, which may result in that in some application scenarios, the downlink peak rate calculated by substituting f1 into Formula 1, Formula 2 or Formula 3 is slightly lower than the target maximum data rate. Taking case (1) as an example, assuming that the target maximum data rate is 10Mbps, the value of f1 is 0.06, corresponding to the case of SCS = 30KHz or 60KHz, the downlink maximum data rate calculated by substituting f1 into Formula 1 is 9.84Mbp or 9.24Mbps respectively. Alternatively, in some application scenarios, the downlink maximum data rate calculated by substituting f1 into Formula 1 is slightly higher than the target maximum data rate (the downlink maximum data rate supported by the terminal device). For example, assuming that the target maximum data rate is 10Mbps, the value of f1 is 0.65, corresponding to the case of SCS = 15KHz or 30KHz, the downlink maximum data rate calculated by substituting f1 into Formula 1 is 11.2Mbps or 10.6Mbps respectively. In one implementation method, no matter what the specific result of substituting f1 into the corresponding formula is, it can be understood that the corresponding target maximum peak rate is 10Mbps; another implementation method is to substitute f1 into the formula and calculate the specific result (for example, retain one or two decimal places), and the specific result is the target maximum peak rate.

[0386] In one possible design, the terminal device reports at least one fourth information corresponding to at least one frequency band in at least one frequency band supported by the terminal device. Alternatively, it can be understood that the terminal device reports the fourth information corresponding to each frequency band supported / operating by the terminal device, and reports several fourth information when operating on several frequency bands. For example, if the terminal device operates on two frequency bands, the fourth information corresponding to the frequency bands is reported on the two frequency bands respectively.

[0387] In one possible design, the fourth information is frequency band specific, that is, the fourth information reported by the terminal device in different frequency bands may be different. For example, the fourth information reported by the terminal device in the FDD frequency band and the TDD frequency band may be different.

[0388] (3) The number of transmitting antennas of the terminal device is 1, the channel bandwidth is 20 MHz, and the maximum modulation mode of uplink data transmission is 64QAM. Optionally, the number of receiving antennas of the terminal device is 1 or 2, and the maximum modulation mode of downlink data transmission is 64QAM.

[0389] (3-a) In the FDD frequency band, the fifth information is equal to the result calculated by formula 7, or the fifth information is the value of the result calculated by formula 7 after rounding off to a preset number of bits. Formula 7 is:

[0390] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·6·R) (Formula 7)

[0391] Wherein, Y represents the maximum uplink data rate, and other parameters can refer to the description of formula 1' and will not be described in detail.

[0392] According to Formula 7, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 13:

[0393] Table 13

[0394]

[0395]

[0396] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.06, 0.07 or 0.10.

[0397] According to Formula 7, when the maximum uplink data rate is 50 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 14:

[0398] Table 14

[0399]

[0400] Alternatively, when the maximum uplink data rate supported by the terminal device is 50 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.60 or 0.70.

[0401] (3-b) In a TDD frequency band where the DL to UL ratio is 7:3, the fifth information is equal to the result calculated by Formula 8, or the fifth information is the value of the result calculated by Formula 8 after rounding off to a preset number of bits. Formula 8 is:

[0402] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·6·R·(UL ratio)) (Formula 8)

[0403] Among them, UL ratio is 3 / 10, which indicates the proportion of UL symbols occupied or the proportion of UL time slots (or UL subframes) occupied in a TDD DL-UL cycle. In a TDD frequency band with a DL:UL configuration of 7:3, UL ratio can be 3 / 10. Y represents the maximum uplink data rate. For other parameters, please refer to the description of formula 1' and will not be repeated here.

[0404] According to Formula 8, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 15:

[0405] Table 15

[0406]

[0407] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.20 or 0.25 or 0.30.

[0408] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=7:3, the uplink maximum data rate corresponding to f2=1.0 may be the uplink maximum data rate corresponding to f2=1.0 in an FDD system multiplied by (310).

[0409] (3-c) In a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the fifth information is equal to the result calculated by formula 9, or the fifth information is the value of the result calculated by formula 9 after rounding off to a preset number of bits. Formula 9 is:

[0410] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·6·R·(ratio)) (Formula 9)

[0411] The UL ratio may be 2 / 10, Y represents the maximum uplink data rate, and other parameters may refer to the description of formula 1', which will not be described in detail.

[0412] According to Formula 9, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 16:

[0413] Table 16

[0414]

[0415] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.30 or 0.35 or 0.40.

[0416] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the uplink maximum data rate corresponding to f2=1.0 may be the uplink maximum data rate corresponding to f2=1.0 in an FDD system multiplied by (2 / 10).

[0417] (4) The number of transmitting antennas of the terminal device is 1, the channel bandwidth is 20 MHz, and the maximum modulation mode of uplink data transmission is 16QAM. Optionally, the number of receiving antennas of the terminal device is 1 or 2, and the maximum modulation mode of downlink data transmission is 64QAM.

[0418] (4-a) In the FDD frequency band, the fifth information is equal to the result calculated by formula 10, or the fifth information is the value of the result calculated by formula 10 after rounding off to a preset number of digits. Formula 10 is:

[0419] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·4·R) (Formula 10)

[0420] Wherein, Y represents the maximum uplink data rate, and other parameters can refer to the description of formula 1' and will not be described in detail.

[0421] According to formula 10, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 17:

[0422] Table 17

[0423]

[0424] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.09 or 0.10.

[0425] According to formula 10, when the maximum uplink data rate is 50 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 18:

[0426] Table 18

[0427]

[0428]

[0429] Alternatively, when the maximum uplink data rate supported by the terminal device is 50 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.90, 0.95 or 1.0.

[0430] (4-b) In a TDD frequency band with a downlink and uplink ratio DL:UL ratio=7:3, the fifth information is equal to the result calculated by formula 11, or the fifth information is the value of the result calculated by formula 11 after rounding off to a preset number of bits. Formula 11 is:

[0431] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·4·R·(ULratio)) (Formula 11)

[0432] Wherein, UL ratio is 3 / 10, Y represents the maximum uplink data rate, and other parameters can refer to the description of formula 1', which will not be described in detail.

[0433] According to formula 11, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 19:

[0434] Table 19

[0435]

[0436] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.30 or 0.35.

[0437] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=7:3, the uplink maximum data rate corresponding to f2=1.0 may be the uplink maximum data rate corresponding to f2=1.0 in an FDD system multiplied by (3 / 10).

[0438] (4-c) In a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the fifth information is equal to the result calculated by formula 12, or the fifth information is the value of the result calculated by formula 12 after rounding off to a preset number of bits. Formula 12 is:

[0439] f2=Y·10 6 / ((1-OH)·(N·12 / T)·2·4·R·(UL ratio)) (Formula 12)

[0440] The UL ratio may be 2 / 10, Y represents the maximum uplink data rate, and other parameters may refer to the description of formula 1', which will not be described in detail.

[0441] According to formula 12, when the maximum uplink data rate is 5 Mbps and the SCS is 15 KHz, 30 KHz or 60 KHz, an implementation method of the fifth information value may be as shown in Table 20:

[0442] Table 20

[0443]

[0444]

[0445] Alternatively, when the maximum uplink data rate supported by the terminal device is 5 Mbps and the terminal device corresponds to different SCSs, in order to simplify the implementation complexity of the terminal device, the terminal device can send the same fifth information. For example, when SCS=15 KHz or 30 KHz, f2 can be 0.45 or 0.50.

[0446] Optionally, in a TDD frequency band with a downlink and uplink ratio DL:UL ratio=8:2, the uplink maximum data rate corresponding to f2=1.0 may be the uplink maximum data rate corresponding to f2=1.0 in an FDD system multiplied by (2 / 8).

[0447] In summary, optionally, in the embodiment of the present application, the fourth value or fifth value of the low maximum data rate (downlink 10Mbps, uplink 5Mbps) corresponding to the terminal device with different capability parameters can be as shown in Table 21. Optionally, the channel bandwidth of the terminal device is 20MHz.

[0448] Table 21

[0449]

[0450] In one possible design, the terminal device reports at least one fifth information corresponding to at least one frequency band in at least one frequency band supported by the terminal device. Alternatively, it can be understood that the terminal device reports the fifth information corresponding to the frequency band in each frequency band it supports / works on, and reports several fifth information in several frequency bands it works on. For example, if the terminal device works on two frequency bands, it reports the fifth information corresponding to the frequency bands in the two frequency bands respectively.

[0451] In one possible design, the fifth information is frequency band specific, that is, the fifth information reported by the terminal device in different frequency bands may be different. For example, the fifth information reported by the terminal device in the FDD and TDD frequency bands is different.

[0452] In one possible design, in different frequency bands, REDCAP terminal devices supporting different capability parameters (e.g., number of transceiver antennas, maximum uplink modulation mode) may report different fourth information and / or fifth information. Through the fourth information and / or fifth information reported by the REDCAP terminal device, different capability parameters supported by the REDCAP terminal device may be distinguished, such as the number of transceiver antennas and maximum uplink modulation mode of the REDCAP terminal device. Exemplarily, as described in (1)-(6):

[0453] (1) In the FDD frequency band, a 1T2R terminal device may report 0.10 to indicate support for a low downlink maximum data rate, such as 10 Mbps, and a 1T1R terminal device may report 0.20 to indicate support for a low downlink maximum data rate, such as 10 Mbps. Further optionally, a 1T2R terminal device and a 1T1R terminal device may be considered as a type of terminal device (such as a REDCAP terminal device), and the network device may distinguish the number of transceiver antennas of a REDCAP terminal device, such as 1T1R or 1T2R, through different fourth information reported by the 1T2R terminal device and the 1T1R terminal device (such as corresponding to 0.10 and 0.20, respectively).

[0454] (2) In the FDD frequency band, a terminal device with an uplink maximum modulation mode of 64QAM can report 0.06 or 0.07 or 0.10 to indicate support for a low uplink maximum data rate, such as 5Mbps, and a terminal device with an uplink maximum modulation mode of 16QAM can report 0.09 or 0.10 to indicate support for a low uplink maximum data rate, such as 5Mbps. Further optionally, a terminal device supporting uplink 64QAM and a terminal device supporting uplink 16QAM can be regarded as a type of terminal device (such as a REDCAP terminal device), and the network device reports different fifth information through the two, such as a terminal device supporting uplink 64QAM reporting 0.06 or 0.07, and a terminal device supporting uplink 16QAM reporting 0.10, so as to distinguish the uplink maximum modulation mode of the REDCAP terminal device, such as 16QAM or 64QAM.

[0455] (3) In the TDD frequency band with a downlink and uplink ratio DL:UL ratio = 7:3, similarly, a 1T2R terminal device can report 0.10 to indicate support for a low downlink maximum data rate, such as 10Mbps, and a 1T1R terminal device can report 0.20 to indicate support for a low downlink maximum data rate, such as 10Mbps. Further optionally, a 1T2R terminal device and a 1T1R terminal device can be regarded as a type of terminal device, such as a REDCAP terminal device, and the network device can distinguish the number of transceiver antennas of a REDCAP terminal device, such as 1T1R or 1T2R, through different fourth information reported by the 1T2R terminal device and the 1T1R terminal device (e.g., corresponding to 0.10 and 0.20, respectively).

[0456] (4) In the TDD frequency band with a downlink and uplink ratio DL:UL ratio = 7:3, a terminal device with an uplink maximum modulation mode of 64QAM can report 0.20, 0.25 or 0.30 to indicate support for a low uplink maximum data rate, such as 5Mbps, and a terminal device with an uplink maximum modulation mode of 16QAM can report 0.30 or 0.35 to indicate support for a low uplink maximum data rate, such as 5Mbps. Further optionally, a terminal device supporting 64QAM in the uplink and a terminal device supporting 16QAM in the uplink can be regarded as a type of terminal device, such as a REDCAP terminal device, and the network device reports different fifth information through the two, for example, a terminal device supporting 64QAM in the uplink reports 0.20, 0.25 or 0.30, and a terminal device supporting 16QAM in the uplink reports 0.35, so as to distinguish the uplink maximum modulation mode of the REDCAP terminal device, such as 16QAM or 64QAM.

[0457] (5) In the TDD frequency band with a downlink and uplink ratio DL:UL ratio = 8:2, similarly, a 1T2R terminal device can report 0.10 to indicate support for a low downlink maximum data rate, such as 10 Mbps, and a 1T1R terminal device can report 0.20 to indicate support for a low downlink maximum data rate, such as 10 Mbps. Further optionally, a 1T2R terminal device and a 1T1R terminal device can be regarded as a type of terminal device, such as a REDCAP terminal device, and the network device can distinguish the number of transceiver antennas of a REDCAP terminal device, such as 1T1R or 1T2R, through different fourth information reported by the 1T2R terminal device and the 1T1R terminal device (e.g., corresponding to 0.10 and 0.20, respectively).

[0458] (6) In the TDD frequency band with a downlink and uplink ratio DL:UL ratio = 8:2, a terminal device with an uplink maximum modulation mode of 64QAM can report 0.30, 0.35 or 0.40 to indicate support for a low uplink maximum data rate, such as 5Mbps, and a terminal device with an uplink maximum modulation mode of 16QAM can report 0.45 or 0.50 to indicate support for a low uplink maximum data rate, such as 5Mbps. Further optionally, a terminal device supporting 64QAM in the uplink and a terminal device supporting 16QAM in the uplink can be regarded as a type of terminal device, such as a REDCAP terminal device. The network device reports different fifth information through the two devices, such as a terminal device supporting 64QAM in the uplink reporting 0.30, 0.35 or 0.40, and a terminal device supporting 16QAM in the uplink reporting 0.45 or 0.50, so as to distinguish the uplink maximum modulation mode of the REDCAP terminal device, such as 16QAM or 64QAM.

[0459] Alternatively, whether it is an FDD band or a TDD band, a 1T2R REDCAP terminal device can report 0.10 to indicate support for a low downlink maximum data rate, such as 10Mbps, and a 1T1R REDCAP terminal device can report 0.20 to indicate support for a low downlink maximum data rate, such as 10Mbps. That is, through the fourth information and / or the fifth information reported by the REDCAP terminal device, different capability parameters (e.g., the number of transceiver antennas) supported by the REDCAP terminal device can be distinguished.

[0460] (1) For the maximum downlink data rate, the fourth information may be reported without distinguishing the bands, or it may be reported with distinguishing the bands. When distinguishing the bands for reporting, the corresponding fourth information may be different (for example, the fourth information corresponding to 1T2R is 0.10, and the fourth information corresponding to 1T1R is 0.20), or they may be the same. Further optionally, for TDD bands with different center frequencies, the DL fourth information may be reported with distinguishing the different TDD bands, or it may be reported without distinguishing the different TDD bands, that is, for TDD bands with different center frequencies, one fourth information is reported, that is, the fourth information is for all TDD bands that the terminal device can support. This can simplify the reporting signaling design.

[0461] (2) For the maximum uplink data rate, due to the restrictions of DL and UL configuration, the FDD band and the TDD band correspond to different fifth information. For example, in the FDD band, a terminal device that supports 64QAM in the uplink modulation mode can report 0.06 or 0.07 to indicate that the maximum uplink data rate supported is 5Mbps, and a terminal device that supports 16QAM in the uplink modulation mode can report 0.09 or 0.10 to indicate that the maximum uplink data rate supported is 5Mbps; in the TDD band, for TDD bands with different center frequencies, only one fifth information can be reported, for example, a terminal device that supports 64QAM in the uplink modulation mode can report 0.30, 0.35 or 0.40 to indicate that the maximum uplink data rate supported is 5Mbps, and a terminal device that supports 16QAM in the uplink modulation mode can report 0.35, 0.45 or 0.50 to indicate that the maximum uplink data rate supported is 5Mbps. That is, for TDD frequency bands with different central frequencies, the UL fifth information may be reported by distinguishing the TDD frequency bands, or may be reported without distinguishing the TDD frequency bands, that is, for TDD frequency bands with different central frequencies, the same fifth information may be reported.

[0462] Optionally, considering the uplink and downlink ratio of the TDD frequency band, when the uplink resources corresponding to the uplink ratio are comparable to the uplink resources of the FDD frequency band (for example, the uplink and downlink ratio is UL:DL=9:1 or UL:DL=8:2), the uplink scaling factor can be reported uniformly for the FDD frequency band and the TDD frequency band, that is, no distinction is made between the reporting of the FDD frequency band and the TDD frequency band; on the other hand, when the downlink resources corresponding to the downlink ratio are comparable to the downlink resources of the FDD frequency band (for example, the uplink and downlink ratio is UL:DL=1:9 or UL:DL=2:8 or UL:DL=3:7), the downlink scaling factor can be reported uniformly for the FDD frequency band and the TDD frequency band, that is, no distinction is made between the reporting of the FDD frequency band and the TDD frequency band.

[0463] It should be noted that in the present application, in the TDD frequency band, the special subframes or special time slots are simplified in the DL:UL or UL:DL ratio. For example, assuming TDD DL:UL=7:3, considering the influence of special subframes or special time slots, the proportion actually used for downlink transmission may be greater than 7 / 10 and less than 8 / 10, or the proportion actually used for downlink transmission may be less than 6 / 10 and greater than 5 / 10. Accordingly, considering the influence of special subframes or special time slots, the proportion actually used for uplink transmission may be greater than 2 / 10 and less than 3 / 10, or the proportion actually used for downlink transmission may be greater than 4 / 10 and less than 5 / 10.

[0464] The above describes that different frequency bands can correspond to different fourth information and / or fifth information, that is, the fourth information and / or fifth information corresponding to the frequency band can be reported separately based on different frequency bands, and the values ​​of the fourth information and / or fifth information corresponding to different frequency bands may be the same or different.

[0465] Alternatively, different frequency bands may correspond to the same fourth information and / or fifth information. In this way, regardless of whether it is an FDD or TDD frequency band, through the corresponding fourth information and / or fifth information, the purpose of the REDCAP terminal device supporting a maximum downlink data rate of 10Mbps and / or a maximum uplink data rate of 5Mbps can be achieved, and the target maximum data rate is not affected by the TDD uplink and downlink ratio, thereby increasing the competitiveness of the REDCAP terminal device in the TDD frequency band.

[0466] In the embodiment of the present application, the terminal device has the same data rate and different scaling factors in different frequency bands. The specific implementation method can refer to the above description.

[0467] In an embodiment of the present application, the terminal device has the same data rate and different scaling factors in the TDD and FDD frequency bands. Specifically, the scaling factor of the terminal device in the TDD frequency band is related to the uplink and downlink ratio of the TDD frequency band. For example, the UL or DL ​​data rate of the terminal device in the TDD and FDD frequency bands is XMbps (X is not greater than 20), but the scaling factors are different; for another example, the UL data rate of the terminal device in the TDD and FDD frequency bands is 5Mbps, but the scaling factors are different; for another example, the DL data rate of the terminal device in the TDD and FDD frequency bands is 10Mbps, but the scaling factors are different. The specific implementation method can refer to the above description.

[0468] In an embodiment of the present application, the data rate difference between the terminal device in the TDD and FDD bands is no more than 1 or 5 Mbps, but the scaling factors in the TDD and FDD bands are different. Specifically, the scaling factor of the terminal device in the TDD band is related to the uplink and downlink ratio of the TDD band. For example, the UL data rate of the terminal device in the TDD band is 5 Mbps, and the UL data rate in the FDD band is 5.5 Mbps, and the scaling factors in the FDD and TDD bands are different. The specific implementation method can refer to the above description.

[0469] In the embodiment of the present application, the maximum downlink peak rate corresponding to the first scaling factor of the terminal device is not greater than 20 Mbps, and / or the maximum downlink peak rate corresponding to the second scaling factor of the terminal device is not less than 60 Mbps or 80 Mbps or 150 Mbps. The specific implementation method can refer to the determination implementation method of f1 above.

[0470] In the embodiment of the present application, the maximum uplink peak rate corresponding to the third scaling factor of the terminal device is not greater than 10 Mbps, and / or the maximum uplink peak rate corresponding to the fourth scaling factor of the terminal device is not less than 40 Mbps or 50 Mbps. The specific implementation method can refer to the determination implementation method of f2 above.

[0471] In the embodiment of the present application, the fourth information may correspond to a DL scaling factor (eg, a first scaling factor, a second scaling factor), and the fifth information may correspond to a UL scaling factor (eg, a third scaling factor, a fourth scaling factor).

[0472] In the embodiment of the present application, a scaling factor (e.g., a first scaling factor, a second scaling factor, a third scaling factor, a fourth scaling factor) can be reported as a capability parameter. Optionally, it can be a parameter included in the first capability set, or a parameter included in other capability sets, or directly reported as a capability parameter.

[0473] In the embodiment of the present application, the scaling factor (eg, the first scaling factor, the second scaling factor, the third scaling factor, the fourth scaling factor) is the corresponding scaling factor in Formula 1 or 1', that is, the parameter f.

[0474] In an embodiment of the present application, the fourth information or the fifth information reported by the terminal device can be determined from a set respectively. Taking the set corresponding to the fourth information as an example, the set includes 2 values, one of which corresponds to a lower downlink maximum data rate, which is not greater than 20Mbps, such as 10Mbps, and the other value corresponds to a higher maximum data rate, which is not less than 60Mbps, such as 150Mbps, or the other value can be directly 1.0, 1.0 represents the maximum downlink maximum data rate that the terminal device can reach or corresponds to the aforementioned higher downlink maximum data rate; taking the set corresponding to the fifth information as an example, the set includes 2 values, one of which corresponds to a lower uplink maximum data rate, which is not greater than 10Mbps, such as 5Mbps, and the other value corresponds to a higher uplink maximum data rate, which is not less than 40Mbps or 50Mbps, such as 50Mbps, or the other value can be directly 1.0, 1.0 represents the maximum uplink maximum data rate that the terminal device can reach or corresponds to the aforementioned higher uplink maximum data rate.

[0475] Optionally, the set corresponding to the fourth information or the set corresponding to the fifth information may also include other values, for example, may include one or more of {0.8, 0.75, 0.4} specified in the existing protocol, so that more different levels of maximum data rates can be achieved.

[0476] In an embodiment of the present application, optionally, the value of the fourth information or the fifth information corresponding to the maximum downlink data rate of 10 Mbps and the maximum uplink data rate of 5 Mbps is only used by REDCAP terminal devices to avoid affecting the peak data rate of existing eMBB terminal devices that have been shipped.

[0477] Optionally, in an embodiment of the application, from the system side, the set corresponding to scalingfacotr may include both the existing scalingfactor such as {1, 0.8, 0.75, 0.4} and the f1 and f2 described above. If there is no value equal to 1 in f1 and f2, the other values ​​in the set except f1 and f2 are only used for eMBB terminal devices in NR, or for NR legacy terminal devices. If there is a value equal to 1 in f1 and f2, the other values ​​in the set except f1 and f2 that are not equal to 1 are only used for eMBB terminal devices in NR, or for NR legacy terminal devices.

[0478] In an embodiment of the present application, in addition to reporting the fourth information and the fifth information for the downlink maximum data rate and the uplink maximum data rate, respectively, the sixth information may also be reported for the downlink maximum data rate and the uplink maximum data rate. The downlink maximum data rate of the terminal device corresponding to the sixth information is less than or equal to X megabits per second, X is 10 or 150, and the uplink maximum data rate of the terminal device corresponding to the sixth information is not higher than Y megabits per second, Y is 5 or 50. Based on the relevant description above, the sixth information may be the larger value of the fourth information and the fifth information corresponding to the downlink maximum data rate and the uplink maximum data rate, respectively, so that the standard implementation can be simplified.

[0479] In some embodiments, the terminal device sends fourth information to the network device. The fourth information indicates the first parameter f1, f1 is a number greater than 0 and less than 1, and the maximum downlink data rate of the terminal device corresponding to f1 is not higher than the first target rate. The first target rate is 10Mbps, or the first target rate is (10+delta1)Mbps, delta1 is a value greater than or equal to 0 and less than or equal to 5, or the first target rate is not greater than 20Mbps. In addition, the fourth information may also indicate the second parameter f1', f1' is a number greater than 0 and less than 1, and the maximum downlink data rate of the terminal device corresponding to f1 is not less than 60Mbps. The calculation method corresponding to f1' can refer to the above embodiment.

[0480] In some embodiments, the terminal device sends fifth information to the network device. The fifth information indicates the third parameter f2, f2 is a number greater than 0 and less than 1, and the maximum uplink data rate of the terminal device corresponding to f2 is not higher than the first target rate. The first target rate is 5Mbps, or the first target rate is (5+delta2)Mbps, delta2 is a value greater than or equal to 0 and less than or equal to 2.5, or the first target rate is not greater than 10Mbps. In addition, the fifth information may also indicate a fourth parameter f2', f2' is a number greater than 0 and less than 1, and the maximum uplink data rate of the terminal device corresponding to f2' is not less than 40Mbps. The calculation method corresponding to f2' can refer to the above embodiment.

[0481] In some other embodiments, the terminal device sends sixth information to the network device, and the corresponding maximum downlink data rate of the terminal device is not higher than the first target rate and the corresponding maximum uplink data rate of the terminal device is not higher than the second target rate. The first target rate and the second target rate are as described above.

[0482] Through the above-mentioned manner, on the one hand, it can be achieved that even if there is only one type of terminal device in the network, different data transmission rates can be achieved, thereby satisfying the data transmission efficiency in different application scenarios; on the other hand, it can be achieved that even if the capability parameters corresponding to the terminal devices are the same, the different data rates that can be supported by terminal devices with the same capabilities can be indicated by reporting the fourth information and / or the fifth information, thereby realizing the identification of different rates of the terminal devices; on the other hand, it can also be achieved that different types of terminal devices can be distinguished by reporting different fourth information and / or fifth information.

[0483] Taking REDCAP terminal devices as an example, the maximum data rates corresponding to REDCAP terminal devices defined by the current standard include: DL maximum data rate is 150Mbps or 10Mbps, and UL maximum data rate is 50Mbps or 5Mbps. Alternatively, it can also be understood that: the maximum data rates corresponding to REDCAP terminal devices are: DL maximum data rate is 150Mbps and UL maximum data rate is 10Mbps, or, DL maximum data rate is 50Mbps and UL maximum data rate is 5Mbps.

[0484] The present application introduces different fourth information and / or fifth information to achieve the support of REDCAP terminal devices for low data transmission rate requirements. For example, even if there is only one type of REDCAP terminal device, this implementation can also achieve support for the uplink and downlink peak transmission rates corresponding to the currently identified application scenarios.

[0485] For different capabilities of REDCAP terminal devices, for example, when the first capability set includes different capability parameters, the value ranges of the fourth information (f1) and the fifth information (f2) may be as shown in Table 22:

[0486] Table 22

[0487]

[0488] In the embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of the terminal device, the network device, and the interaction between the terminal device and the network device. In order to realize the functions in the methods provided by the embodiments of the present application, the terminal device and the network device may include a hardware structure and / or a software module, and the functions are realized in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a function in the functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0489] In the case of dividing each functional module into corresponding functional modules, Figure 7 A possible structural diagram of the terminal device 7 involved in the above-mentioned embodiment is shown, and the terminal device 7 includes: a transceiver unit 701. In the embodiment of the present application, the transceiver unit 701 is used to send first information to the network device, and the first information is used to indicate that the terminal device belongs to a first type of terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, and the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4. The transceiver unit 701 can be a sending unit or a transmitter when sending information, and can be a receiving unit or a receiver when receiving information. The transceiver unit can be a transceiver, and this transceiver, transmitter or receiver can be a radio frequency circuit. When the terminal device includes a storage unit, the storage unit is used to store computer instructions, and the processor is communicatively connected to the memory, and the processor executes the computer instructions stored in the memory, so that the terminal device executes Figure 5 The method involved in the embodiment. The processor may be a general-purpose central processing unit (CPU), a microprocessor or an ASIC. When the terminal device is a chip, the transceiver unit 701 may be an input and / or output interface, a pin or a circuit, etc. The processing unit may execute the computer-executable instructions stored in the storage unit to enable the chip in the terminal device to execute Figure 5Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, such as a RAM, etc.

[0490] exist Figure 5 In the method embodiment shown, the transceiver unit 701 is used to support the terminal device to execute Figure 5 The process 501 in the above method embodiment. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0491] Among them, the transceiver unit 701 can be Figure 3 The communication interface 304 in.

[0492] In the case of dividing each functional module into corresponding functional modules, Figure 8 A possible structural diagram of the network device 8 involved in the above-mentioned embodiment is shown, and the network device 8 includes: a transceiver unit 801. In the embodiment of the present application, the transceiver unit 801 is used to receive first information from a terminal device, and the first information is used to indicate that the terminal device belongs to a first type of terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, and the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4. The transceiver unit 801 can be a sending unit or a transmitter when sending information, and can be a receiving unit or a receiver when receiving information. The transceiver unit can be a transceiver, and this transceiver, transmitter or receiver can be a radio frequency circuit. When the network device includes a storage unit, the storage unit is used to store computer instructions, and the processor is communicatively connected to the memory, and the processor executes the computer instructions stored in the memory, so that the network device executes Figure 5 The method involved in the embodiment. The processor may be a general-purpose central processing unit (CPU), a microprocessor or an ASIC. When the network device is a chip, the transceiver unit 801 may be an input and / or output interface, a pin or a circuit, etc. The processing unit may execute the computer-executable instructions stored in the storage unit to enable the chip in the network device to execute Figure 5 Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, such as a RAM, etc.

[0493] exist Figure 5In the method embodiment shown, the transceiver unit 801 is used to support the network device to execute Figure 5 The process 502 in the above method embodiment. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0494] Among them, the transceiver unit 801 can be Figure 4 The communication interface 404 in.

[0495] Exemplarily, the terminal device or network device in each of the above-mentioned apparatus embodiments and the terminal device or network device in the method embodiment can completely correspond, and the corresponding modules or units perform the corresponding steps. For example, the communication module (transceiver) can perform the steps of sending and / or receiving in the method embodiment, and the other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can refer to the corresponding method embodiments. The sending unit and the receiving unit can form a transceiver unit, and the transmitter and the receiver can form a transceiver to jointly realize the transceiver function; the processor can be one or more.

[0496] Exemplarily, the functions of the above-mentioned terminal device or network device can be implemented by a chip, and the processing unit can be implemented by hardware or by software. When implemented by hardware, the processing unit can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processing unit can be a general-purpose processor, which is implemented by reading the software code stored in a storage unit. The storage unit can be integrated in the processor or located outside the processor and exist independently.

[0497] The terminal devices or network devices in the above-mentioned various device embodiments completely correspond to the terminal devices or network devices in the method embodiments, and the corresponding modules or units perform the corresponding steps. For example, the sending module (transmitter) method performs the sending steps in the method embodiment, and the receiving module (receiver) performs the receiving steps in the method embodiment. The other steps except sending and receiving can be performed by the processing module (processor). The functions of the specific modules can refer to the corresponding method embodiments. The sending module and the receiving module can form a transceiver module, and the transmitter and the receiver can form a transceiver to jointly realize the transceiver function; the processor can be one or more.

[0498] The division of modules or units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. For example, in the embodiments of the present application, the receiving unit and the sending unit may be integrated into the transceiver unit.

[0499] In the method provided in the embodiment of the present application, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state drive (SSD)).

[0500] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An information sending method, applied to a terminal device or a chip in a terminal device, characterized in that: include: Sending first information to a network device, wherein the first information is used to indicate that the terminal device belongs to a first type of terminal device, wherein the first type of terminal device is a reduced capability REDCAP terminal device; capability parameters corresponding to the first type of terminal device include a first capability set, wherein the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

2. The method according to claim 1, characterized in that The channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1 or 2, and the number of receiving antennas of the terminal device is 1 or 2.

3. The method according to claim 1 or 2, characterized in that: The number of transmitting antennas of the terminal device is the number of transmitting antenna ports of the terminal device, and the number of receiving antennas of the terminal device is the number of receiving antenna ports of the terminal device.

4. The method according to any one of claims 1 to 3, characterized in that The maximum number of PDSCH MIMO layers supported by the terminal device is equal to the number of receiving antennas of the terminal device.

5. The method according to any one of claims 1 to 3, characterized in that: When the terminal device does not support SRS transmission switching and the number of PUSCH MIMO layers is 1, the number of transmitting antennas of the terminal device is 1.

6. The method according to any one of claims 1 to 5, characterized in that: The capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, where the second capability set is used to characterize a power saving capability of the terminal device; A third capability set, where the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, wherein the fourth capability set is used to characterize a short-delay processing capability of the terminal device; a fifth capability set, wherein the fifth capability set is used to characterize a small data transmission capability and / or an inactive data transmission capability of the terminal device; a sixth capability set, wherein the sixth capability set is used to characterize the transmission reliability capability of the terminal device; The seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

7. The method according to claim 6, characterized in that The method further comprises: The terminal device sends second information to the network device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

8. The method according to claim 7, characterized in that The first information is sent in an initial access phase, and the second information is sent in a connected state.

9. The method according to any one of claims 6 to 8, characterized in that: The method further comprises: The terminal device sends third information to the network device; The third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

10. An information receiving method, applied to a network device or a chip in a network device, characterized in that: include: Receive first information from a terminal device, the first information is used to indicate that the terminal device belongs to a first type of terminal device, wherein the first type of terminal device is a reduced capability REDCAP terminal device; capability parameters corresponding to the first type of terminal device include a first capability set, the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

11. The method according to claim 10, characterized in that The channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1 or 2, and the number of receiving antennas of the terminal device is 1 or 2.

12. The method according to claim 10 or 11, characterized in that: The number of transmitting antennas of the terminal device is the number of transmitting antenna ports of the terminal device, and the number of receiving antennas of the terminal device is the number of receiving antenna ports of the terminal device.

13. The method according to any one of claims 10 to 12, characterized in that: The maximum number of PDSCH MIMO layers supported by the terminal device is equal to the number of receiving antennas of the terminal device.

14. The method according to any one of claims 10 to 12, characterized in that: When the terminal device does not support SRS transmission switching and the number of PUSCH MIMO layers is 1, the number of transmitting antennas of the terminal device is 1.

15. The method according to any one of claims 10 to 14, characterized in that: The capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, where the second capability set is used to characterize a power saving capability of the terminal device; A third capability set, where the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, wherein the fourth capability set is used to characterize a short-delay processing capability of the terminal device; a fifth capability set, wherein the fifth capability set is used to characterize a small data transmission capability and / or an inactive data transmission capability of the terminal device; a sixth capability set, wherein the sixth capability set is used to characterize the transmission reliability capability of the terminal device; The seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

16. The method according to claim 15, characterized in that The method further comprises: The network device receives second information from the terminal device, and the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

17. The method according to claim 16, characterized in that The first information is sent in an initial access phase, and the second information is sent in a connected state.

18. The method according to any one of claims 14 to 17, characterized in that: The method further comprises: The network device receives third information from the terminal device; The third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

19. A communication device, characterized in that: include: A transceiver unit is used to send first information to a network device, wherein the first information is used to indicate that the terminal device belongs to a first type of terminal device, wherein the first type of terminal device is a reduced capability REDCAP terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, and the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

20. The communication device according to claim 19, characterized in that The channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1 or 2, and the number of receiving antennas of the terminal device is 1 or 2.

21. The communication device according to claim 19 or 20, characterized in that: The number of transmitting antennas of the terminal device is the number of transmitting antenna ports of the terminal device, and the number of receiving antennas of the terminal device is the number of receiving antenna ports of the terminal device.

22. The communication device according to any one of claims 19 to 21, characterized in that: The maximum number of PDSCH MIMO layers supported by the terminal device is equal to the number of receiving antennas of the terminal device.

23. The communication device according to any one of claims 19 to 21, characterized in that: When the terminal device does not support SRS transmission switching and the number of PUSCH MIMO layers is 1, the number of transmitting antennas of the terminal device is 1.

24. The communication device according to any one of claims 19 to 23, characterized in that: The capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, where the second capability set is used to characterize a power saving capability of the terminal device; A third capability set, where the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, wherein the fourth capability set is used to characterize a short-delay processing capability of the terminal device; a fifth capability set, wherein the fifth capability set is used to characterize a small data transmission capability and / or an inactive data transmission capability of the terminal device; a sixth capability set, wherein the sixth capability set is used to characterize the transmission reliability capability of the terminal device; The seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

25. The communication device according to claim 24, characterized in that The transceiver unit is also used for: Sending second information to the network device, the second information is used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

26. The communication device according to claim 25, characterized in that The first information is sent in an initial access phase, and the second information is sent in a connected state.

27. The communication device according to any one of claims 24 to 26, characterized in that: The transceiver unit is also used for: Sending third information to the network device; The third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

28. A communication device, characterized in that: include: A transceiver unit is used to receive first information from a terminal device, wherein the first information is used to indicate that the terminal device belongs to a first type of terminal device, wherein the first type of terminal device is a reduced capability REDCAP terminal device; the capability parameters corresponding to the first type of terminal device include a first capability set, and the first capability set includes a channel bandwidth supported by the terminal device and the number of transmitting antennas of the terminal device; the channel bandwidth of the terminal device is less than 100 MHz, and the number of transmitting antennas of the terminal device is less than 4.

29. The communication device according to claim 28, characterized in that The channel bandwidth of the terminal device is 20 MHz or 50 MHz, the number of transmitting antennas of the terminal device is 1 or 2, and the number of receiving antennas of the terminal device is 1 or 2.

30. The communication device according to claim 28 or 29, characterized in that: The number of transmitting antennas of the terminal device is the number of transmitting antenna ports of the terminal device, and the number of receiving antennas of the terminal device is the number of receiving antenna ports of the terminal device.

31. The communication device according to any one of claims 28 to 30, characterized in that: The maximum number of PDSCH MIMO layers supported by the terminal device is equal to the number of receiving antennas of the terminal device.

32. The communication device according to any one of claims 28 to 30, characterized in that: When the terminal device does not support SRS transmission switching and the number of PUSCH MIMO layers is 1, the number of transmitting antennas of the terminal device is 1.

33. The communication device according to any one of claims 28 to 32, characterized in that: The capability parameters corresponding to the first type of terminal device also include at least one of the following capability sets: a second capability set, where the second capability set is used to characterize a power saving capability of the terminal device; A third capability set, where the third capability set is used to characterize the coverage enhancement capability and / or data transmission rate improvement capability of the terminal device; a fourth capability set, wherein the fourth capability set is used to characterize a short-delay processing capability of the terminal device; a fifth capability set, wherein the fifth capability set is used to characterize a small data transmission capability and / or an inactive data transmission capability of the terminal device; a sixth capability set, wherein the sixth capability set is used to characterize the transmission reliability capability of the terminal device; The seventh capability set is used to characterize the ultra-reliable low-latency communication URLLC data transmission capability of the terminal device.

34. The communication device according to claim 33, characterized in that The transceiver unit is also used for: Receive second information from the terminal device, the second information being used to indicate that the capability parameters corresponding to the first type of terminal device also include at least one capability set of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

35. The communication device according to claim 34, characterized in that The first information is sent in an initial access phase, and the second information is sent in a connected state.

36. The communication device according to any one of claims 33 to 35, characterized in that: The transceiver unit is also used for: receiving third information from the terminal device; The third information is used to indicate an application scenario of the terminal device, and the application scenario of the terminal device is associated with at least one of the second capability set, the third capability set, the fourth capability set, the fifth capability set, the sixth capability set or the seventh capability set.

37. A communication device, characterized in that: The communication device includes a memory and a processor, wherein the processor is coupled to the memory; The memory is used to store computer-executable instructions. When the communication device is running, the processor executes the computer-executable instructions to enable the communication device to execute the information sending method according to any one of claims 1 to 9 or the information receiving method according to any one of claims 10 to 18.

38. A computer-readable storage medium, characterized in that: The method comprises instructions which, when executed on a computer, enable the computer to execute the information sending method according to any one of claims 1 to 9 or the information receiving method according to any one of claims 10 to 18.

39. A chip, characterized in that: Includes processor and interface; The processor is used to read instructions to execute the information sending method described in any one of claims 1-9 or the information receiving method described in any one of claims 10-18.

40. A communication system, characterized in that: Includes the communication device described in any one of claims 19-27 and the communication device described in any one of claims 28-36.

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