RU2800007C2 - Transmission method and communication equipment - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: group of inventions relates to wireless communication. In the feedback information transmission method, a first downlink control information (DCI) is received, the first DCI is used to indicate or activate a downlink transmission resource; receiving downlink data on the downlink transmission resource; receiving a second DCI, the second DCI being used to indicate an uplink transmission resource and the uplink transmission resource being used to transmit feedback information for the downlink data; and sending feedback information on the uplink transmission resource.

EFFECT: reducing the power consumption of the terminal device during the channel access procedure.

30 cl, 10 dwg

Description

Technical field

[0001] This application relates to the field of communication, and more specifically to the transmission method and communication equipment.

State of the art

[0002] A wireless communication system may transmit data in an unlicensed frequency band to improve spectrum utilization. Before transmitting data to a communication device, such as a terminal device or a network device, it is necessary to complete the channel access process (or listen before talk (LBT)) in order to access the channel. The channel access process includes a fixed duration based channel access process and a return based channel access process. Only after the channel access process is completed, the communication device can use the channel for a certain period of time. The period of time is called channel occupancy time (COT).

[0003] In the prior art, before transmitting hybrid automatic repeat request (HARQ) feedback for downlink data in an unlicensed cell, the terminal device needs to perform a backlink-based channel access process to obtain a channel to transmit HARQ feedback for downlink data. The process is relatively complex to implement.

The essence of the invention

[0004] This application provides a transmission method and communication apparatus to simplify the LBT behavior before the terminal device transmits HARQ feedback and reduce implementation complexity.

[0005] According to a first aspect, a transmission method is provided. The method may be performed by a terminal device or may be performed by a chip configured in the terminal device.

[0006] The method includes: receiving first downlink control information (DCI), where the first DCI is used to indicate or activate a downlink transmission resource; receiving downlink data on the downlink transmission resource; receiving a second DCI, where the second DCI is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for downlink data; and sending feedback information on the uplink transmission resource.

[0007] According to the transmission method provided in this application, the network device first configures a dynamically scheduled downlink transmission resource or activates a semi-persistently scheduled downlink transmission resource using the first DCI. Then, the network device sends a second DCI to the terminal device upon completion of the channel access process to indicate the uplink transmission resource used to transmit the HARQ feedback for the downlink data. Compared to that of the prior art, the network device indicates resource allocation based on two parts of the DCI. In resource allocation, the network device performs a listen before talk (LBT) (or called a monitor before transmission). This is equivalent to the network device sharing the COT corresponding to the uplink transmission resource with the terminal device. The terminal device receives resources in two packets and shares the LBT effect of the network device. Thus, the terminal device is allowed to perform the first type channel access process, or the terminal device is allowed not to perform the channel access process. Therefore, the terminal device can send feedback information on the uplink resource without performing the second type channel access process in order to simplify the behavior of the terminal device and reduce the implementation complexity.

[0008] The first type channel access process may also be referred to as a fixed duration based channel access process. The second type channel access process may also be referred to as a return-based channel access process. See the descriptions of specific embodiments for details. Details are not described here.

[0009] With respect to the first aspect, in some implementations of the first aspect, the first DCI may further include a HARQ process identifier (identifier, ID).

[0010] The first DCI carries the HARQ process ID, and the terminal device may perform HARQ feedback based on the HARQ process ID.

[0011] With respect to the first aspect, in some implementations of the first aspect, receiving the second DCI includes: monitoring the downlink control channel at the target time period to obtain the second DCI, where the discontinuous reception (DRX) activation time includes the target time period or the DRX activation time of the discontinuous DRX reception does not include the target time period.

[0012] If the DRX activation time includes the target time period, the terminal device monitors the physical downlink control channels (PDCCHs) of all activated serving cells in the target time period. If the DRX activation time does not include the target time period, the terminal device monitors the PDCCH of a particular activated serving cell in the target time period, namely the PDCCH of the serving cell in which the second DCI can be transmitted. Compared with the case in which the terminal device monitors the PDCCH of all activated serving cells in the target time period, the implementation of the terminal device in this case is simpler.

[0013] Regarding the first aspect, in some implementations of the first aspect, the start time of the target time period is determined based on the end location of the first DCI or the end location of the downlink data, or the start time of the target time period is configured by the network device.

[0014] Regarding the first aspect, in some implementations of the first aspect, the end time of the target time period is the time at which the second DCI is received, or the end time of the target time period is configured by the network device.

[0015] Regarding the first aspect, in some implementations of the first aspect, the first DCI includes time range indication information, wherein the time range indication information is used to indicate a time range, and the time range is a time range in which the terminal device expects to receive the second DCI.

[0016] Based on the above technical solution, the terminal device can monitor the second DCI only in the time range in which it is expected to receive the second DCI, and it does not need to constantly monitor the second DCI. This can reduce power consumption.

[0017] Regarding the first aspect, in some implementations of the first aspect, the second DCI is used to indicate that the channel access process type of the terminal device is the first type, or the second DCI is used to indicate to the terminal device not to perform the channel access process.

[0018] Based on the above technical solution, when the second DCI is received, the terminal device may perform the first type channel access process. After the first type channel access process is completed, the terminal device may send feedback information using the uplink transmission resource. Alternatively, when the second DCI is received, the terminal device may send the feedback information using the uplink transmission resource without performing the first type channel access process. Therefore, the terminal device may not perform the second type channel access process. This simplifies the behavior of the terminal device and reduces implementation complexity.

[0019] With regard to the first aspect, in some implementations of the first aspect, the downlink transmission resource and the uplink transmission resource belong to different channel busy times COT in the time domain.

[0020] With respect to the first aspect, in some implementations of the first aspect, the second DCI further includes at least one of the following:

[0021] (1) identification information (ID) of the terminal device

[0022] The network device may indicate, using the terminal device ID information, in the second DCI, the terminal device for which the second DCI is specific. The second DCI may not include terminal device ID information, and the second DCI may be broadcast or multicast.

[0023] (2) First serving cell ID information. The first serving cell is a cell corresponding to the downlink transmission resource on which the first DCI is carried.

[0024] The second DCI may carry the first serving cell ID information to indicate that the uplink transmission resource indicated by the second DCI is used to transmit HARQ feedback for the downlink transmission resource in the cell. If the second DCI does not include the first serving cell ID information, the terminal device can determine based on the cell corresponding to the resource for transmitting the second DCI, namely the third serving cell, that the second DCI is the first DCI of the cell.

[0025] (3) Second serving cell ID information. The uplink transmission resource indicated by the second DCI is located in the second serving cell.

[0026] The second DCI carries second serving cell ID information to indicate to the terminal device that the serving cell in which the uplink transmission resource is located is in the serving cell. If the second DCI does not include the second serving cell ID information, the second serving cell and the downlink transmission resource can be considered to correspond to the same serving cell.

[0027] (4) HARQ process ID information.

[0028] The HARQ process is the HARQ process corresponding to the second DCI. In other words, the uplink transmission resource indicated by the second DCI is used to perform HARQ feedback for HARQ processes.

[0029] If the second DCI does not include HARQ process ID information, the HARQ process corresponding to the second DCI can be determined by the other three methods.

[0030] Method 1: The network device sends configuration information to the terminal device. The configuration information is used to indicate the HARQ processes corresponding to the HARQ feedback performed by the terminal device on the uplink transmission resource indicated by the second DCI. In other words, the network device pre-configures the IDs of these HARQ processes. The terminal device sends to the network device, using the uplink transmission resource configured using the second DCI, HARQ feedback of HARQ processes corresponding to those HARQ process IDs.

[0031] Method 2: All HARQ processes corresponding to the second DCI are HARQ processes. In other words, after receiving the second DCI, the terminal device sends feedback information for all HARQ processes to the network device. It should be understood that the downlink data scheduled using the first DCI may correspond to one or more of all HARQ processes.

[0032] Method 3: The network device configures the maximum number of HARQ processes that can be returned. The terminal device notifies the network device of the HARQ process or HARQ processes for which the feedback information is specific.

[0033] (5) Uplink band part ID information, BWP. The uplink BWP is the BWP to which the uplink transmission resource belongs.

[0034] In other words, the uplink BWP ID indicates the BWP on which the uplink transmission resource configured using the second DCI is located. If the uplink BWP indicated by the second DCI is not the currently activated uplink BWP, the terminal device performs an uplink BWP switching process to switch from the activated uplink BWP to the indicated uplink BWP. If the second DCI does not include the uplink BWP ID information, the uplink transmission resource configured using the second DCI is on the currently activated BWP UL.

[0035] (6) Subband ID information. A subband is a subband to which an uplink transmission resource belongs.

[0036] In other words, the subband ID is used to indicate the subband on which the uplink transmission resource is located. The terminal device sends feedback information to the network device in the specified subband.

[0037] If the second DCI does not include subband ID information, the uplink transmission resource and the downlink transmission resource can be considered to correspond to the same subband.

[0038] Finally, the second DCI may include one or more of items (1) - (6), or the second DCI may not include one of items (1) - (6).

[0039] With regard to the first aspect, in some implementations of the first aspect, the result of the cyclic redundancy check (CRC) of the first DCI is scrambled using the first radio network temporary identifier (RNTI), and the CRC of the second DCI is scrambled using the second RNTI, and the first RNTI is the same as or different from the second RNTI.

[0040] For example, if the first RNTI is the same as the second RNTI, each of the first DCI and the second DCI may include an indicator bit. The indicator bit is used to distinguish between the first DCI and the second DCI.

[0041] Regarding the first aspect, in some implementations of the first aspect, the first serving cell in which the first DCI is transmitted corresponds to the third serving cell, and receiving the second DCI includes: monitoring a downlink control channel in the third serving cell to obtain the second DCI.

[0042] In addition, the correspondence between the first serving cell and the third serving cell is configured for the terminal device by the network device, or the correspondence between the first serving cell and the third serving cell is set in advance.

[0043] Based on the above technical solution, the terminal device can determine the third serving cell based on the correspondence between the first serving cell and the third serving cell, and then monitor the downlink control channel in the third serving cell to obtain the second DCI.

[0044] With respect to the first aspect, in some implementations of the first aspect, the method may include: when there is no running random access process or a running random access process has ended, starting or restarting a BWP portion of the band inactivity timer (bwp-inactivitytimer); and/or starting or restarting a secondary cell deactivation timer (scell-deactivationtimer), where the BWP inactivity timer is used to switch the BWP and the secondary cell deactivation timer is used to deactivate the secondary cell.

[0045] The BWP inactivity timer is started or restarted, the BWP activation time may be extended, and the BWP may be used for data transmission. The secondary cell deactivation timer is started or restarted, the secondary cell deactivation time (SCell) may be extended, and the SCell may be used for data transmission.

[0046] According to a second aspect, a transmission method is provided. The method may be performed by a network device or may be performed by a chip configured in the network device.

[0047] The method includes: sending a first DCI, where the first DCI is used to indicate or activate a downlink transmission resource; sending downlink data on the downlink transmission resource; sending a second DCI, where the second DCI is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for downlink data; and receiving feedback information on the uplink transmission resource.

[0048] According to the transmission method provided in this application, the network device first configures a dynamically scheduled downlink transmission resource or activates a semi-persistently scheduled downlink transmission resource using the first DCI. Then, the network device sends a second DCI to the terminal device upon completion of the channel access process to indicate the uplink transmission resource used to transmit the HARQ feedback for the downlink data. Compared to that of the prior art, the network device indicates resource allocation based on two parts of the DCI. In resource allocation, the network device performs a listen before talk (LBT) (or called a monitor before transmission). This is equivalent to the network device sharing the COT corresponding to the uplink transmission resource with the terminal device. The terminal device receives resources in two packets and shares the LBT effect of the network device. Thus, the terminal device is allowed to perform the first type channel access process, or the terminal device is allowed not to perform the channel access process. Therefore, the terminal device can send feedback information on the uplink resource without performing the second type channel access process in order to simplify the behavior of the terminal device and reduce the implementation complexity.

[0049] With regard to the second aspect, in some implementations of the second aspect, the first DCI includes time range indication information, wherein the time range indication information is used to indicate a time range, and the time range is a time range in which the terminal device expects to receive the second DCI.

[0050] With regard to the second aspect, in some implementations of the second aspect, the second DCI is used to indicate that the channel access process type of the terminal device is the first type, or the second DCI is used to indicate to the terminal device not to perform the channel access process.

[0051] With regard to the second aspect, in some implementations of the second aspect, the downlink transmission resource and the uplink transmission resource belong to different channel busy times COT in the time domain.

[0052] With regard to the second aspect, in some implementations of the second aspect, the second DCI further includes at least one of the following:

[0053] Terminal device ID information;

[0054] The first serving cell ID information, where the first serving cell is the cell corresponding to the downlink transmission resource on which the first DCI is carried;

[0055] The ID information of the second serving cell, where the uplink transmission resource is located in the second serving cell;

[0056] The ID information of the hybrid automatic request to repeat the HARQ process, where the HARQ process is the HARQ process corresponding to the second DCI;

[0057] The uplink BWP part ID information, where the uplink BWP is the BWP to which the uplink transmission resource belongs; And

[0058] The subband ID information, where the subband is the subband to which the uplink transmission resource belongs.

[0059] Regarding the second aspect, in some implementations of the second aspect, the CRC result of the CRC of the first DCI is scrambled using the temporary RNTI of the first radio network, the CRC of the second DCI is scrambled using the second RNTI, and the first RNTI is the same as or different from the second RNTI.

[0060] Regarding the second aspect, in some implementations of the second aspect, the first RNTI is the same as the second RNTI, each of the first DCI and the second DCI includes an indicator bit, and the indicator bit is used to distinguish between the first DCI and the second DCI.

[0061] With regard to the second aspect, in some implementations of the second aspect, the first serving cell in which the first DCI is transmitted corresponds to the third serving cell, and the third serving cell is the cell in which the second DCI is located.

[0062] With regard to the second aspect, in some implementations of the second aspect, the correspondence between the first serving cell and the third serving cell is configured for the terminal device by the network device, or the correspondence between the first serving cell and the third serving cell is preset.

[0063] According to a third aspect, this application provides communication equipment. The communication equipment has the function of implementing the behavior of the terminal device in any aspect of the above methods and includes blocks or means (means) corresponding to the steps or functions described in the method in the first aspect. The steps or functions may be implemented using software, hardware, or a combination of hardware and software.

[0064] According to a fourth aspect, this application provides communication equipment. The communication equipment has the function of implementing the behavior of a network device in any aspect of the above methods and includes blocks or means (means) corresponding to the steps or functions described in the method in the second aspect. The steps or functions may be implemented using software, hardware, or a combination of hardware and software.

[0065] According to a fifth aspect, this application provides communications equipment, including a processor. The processor is configured to connect to the memory, read and execute the program stored in the memory to implement the method provided in the first aspect.

[0066] Optionally, there are one or more processors and one or more memories.

[0067] Optionally, the memory may be integrated with the processor, or the memory and processor may be located separately.

[0068] In a specific implementation process, the memory may be non-volatile (non-transitory) memory, such as read-only memory (ROM). The memory and processor may be integrated on the same chip or may be located separately on different chips. The type of memory and the arrangement of the memory and the processor are not limited in this embodiment of this application.

[0069] It should be understood that the associated communication process, such as sending configuration information, may be the process of outputting indication information from the processor, and receiving the capability information may be the process of receiving input capability information by the processor. In particular, data output by the processor may be output to a transmitter, and input data received by the processor may be from a receiver. The transmitter and receiver together may be referred to as a transceiver.

[0070] The apparatus according to the fifth aspect may be a microchip. The processor may be implemented using hardware or software. When a processor is implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When the processor is implemented in software. The processor may be a general purpose processor and is implemented by reading program code stored in memory. The memory may be integrated into the processor or may exist independently outside the processor.

[0071] According to a sixth aspect, this application provides communications equipment, including a processor. The processor is configured to connect to the memory, read and execute the program stored in the memory to implement the method provided in the second aspect.

[0072] Optionally, there are one or more processors and one or more memories.

[0073] Optionally, the memory may be integrated with the processor, or the memory and processor may be located separately.

[0074] In a specific implementation process, the memory may be a non-volatile (non-transitory) memory, such as read-only memory (ROM). The memory and processor may be integrated on the same chip or may be located separately on different chips. The type of memory and the arrangement of the memory and the processor are not limited in this embodiment of this application.

[0075] It should be understood that the associated communication process, such as sending configuration information, may be the process of outputting indication information from the processor, and receiving the capability information may be the process of receiving input capability information by the processor. In particular, data output by the processor may be output to a transmitter, and input data received by the processor may be from a receiver. The transmitter and receiver together may be referred to as a transceiver.

[0076] The apparatus according to the sixth aspect may be a microchip. The processor may be implemented using hardware or software. When a processor is implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When the processor is implemented in software. The processor may be a general purpose processor and is implemented by reading program code stored in memory. The memory may be integrated into the processor or may exist independently outside the processor.

[0077] According to the seventh aspect, this application provides communication equipment, including a processor and an interface circuit. The processor is configured to communicate with other equipment through the interface circuit and perform the method provided in the first aspect.

[0078] Optionally, there are one or more processors and one or more memories.

[0079] According to the eighth aspect, this application provides communication equipment, including a processor and an interface circuit. The processor is configured to communicate with other equipment through the interface circuit and perform the method provided in the second aspect.

[0080] Optionally, there are one or more processors and one or more memories.

[0081] In a ninth aspect, this application provides a program. When the program is executed by the processor, the program is used to execute the method according to the first or second aspect.

[0082] According to a tenth aspect, this application provides a software product, such as a computer-readable storage medium, including a program in a ninth aspect.

[0083] Based on the above technical solutions, the network device indicates to allocate resources based on two parts of the DCI. When allocating resources, the network device performs LBT. This is equivalent to the network device sharing the COT corresponding to the uplink transmission resource with the terminal device. The terminal device receives resources in two packets and shares the LBT effect of the network device. Thus, the terminal device is allowed to perform the first type channel access process, or the terminal device is allowed not to perform the channel access process. Therefore, the terminal can send feedback information on the uplink resource without performing the second type channel access process in order to simplify the behavior of the terminal apparatus and reduce the implementation complexity. In addition, since the uplink transmission resource can be flexibly allocated by the second DCI, the network device can flexibly schedule the uplink resource and the downlink resource. This improves resource utilization.

BRIEF DESCRIPTION OF THE DRAWINGS

[0084] FIG. 1 is a schematic diagram of a communication system to which an embodiment of this application is applicable;

[0085] FIG. 2 is a schematic diagram of a network architecture to which an embodiment of this application is applicable;

[0086] FIG. 3 is another schematic diagram of a network architecture to which an embodiment of this application applies;

[0087] FIG. 4 is a schematic diagram of the interaction of a transmission method according to an embodiment of this application;

[0088] FIG. 5 is a schematic diagram of the execution of uplink and downlink transmission using the method of this application;

[0089] FIG. 6 is a schematic diagram of a target time period in a dynamic scheduling scenario;

[0090] FIG. 7 is another schematic diagram of a target time period in a dynamic scheduling scenario;

[000091] FIG. 8 is a schematic block diagram of a communication apparatus in accordance with an embodiment of this application;

[0092] FIG. 9 is a schematic diagram of the structure of a terminal device according to an embodiment of this application; And

[0093] FIG. 10 is a schematic diagram of the structure of a network device according to an embodiment of this application.

Description of Embodiments

[0094] The technical solutions of the present application will now be described with reference to the accompanying drawings.

[0095] The technical solutions of the embodiments of this application may be applicable to various communication systems, such as, but not limited to, narrowband Internet of things (narrowband internet of things, NB-IoT), global system for mobile communications (global system for mobile communications, GSM), code division multiple access (CDMA) system, wideband code division multiple access (WCDMA), general packet radio service (general packet radio service). , GPRS), long-term evolution (LTE), LTE frequency division duplex (FDD), LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) 5th generation, 5G or new radio (new radio, NR).

[0096] FIG. 1 is a schematic diagram of a communications system 100 to which an embodiment of this application is applicable. As shown in FIG. 1, a terminal 130 connects to a wireless network to receive a service from an external network (eg, the Internet) via the wireless network or to communicate with another terminal via the wireless network. The wireless network includes a RAN 110 and a core network (CN) 120. RAN 110 is used to connect terminal 130 to a wireless network. CN 120 is used to administer terminal 130 and provide a gateway to communicate with the external network.

[0097] A terminal, also referred to as a terminal device, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc., is a device that provides a user with voice/data transmission capabilities. For example, the terminal is a handheld device or a vehicle-mounted device with a wireless connection function. Currently, some examples of the terminal are: mobile phone, tablet computer, laptop, PDA, mobile internet device (MID), wearable device, virtual reality device (virtual reality, VR), augmented reality device (AR), wireless terminal in industrial control (industrial control), wireless terminal in autonomous driving (self driving), wireless terminal in remote medical surgery (remote medical surgery), wireless terminal in intelligent network (s mart grid), a wireless terminal in transportation safety, a wireless terminal in a smart city, or a wireless terminal in a smart home.

[0098] A network device is a device in a wireless network. For example, the network device is a radio access network (RAN) node that connects a terminal to a wireless network. Currently, some examples of a RAN node are: gNB, transmission reception point (TRP), evolved NodeB (evolved NodeB, eNB), radio network controller (RNC), NodeB (NodeB, NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g. home enhanced NodeB or home NodeB, HNB ), baseband unit (BBU) or access point (access point, AP) with support for wireless communication (wireless fidelity, Wi-Fi). In the network structure, the network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0099] FIG. 2 is a schematic diagram of a network architecture according to an embodiment of this application. As shown in FIG. 2, the network architecture includes a core network (CN) device and a RAN device. The RAN device includes baseband equipment and RF equipment. The baseband apparatus may be implemented by a single node, or may be implemented by multiple nodes. The RF equipment may be independently implemented remotely from the baseband equipment, or may be integrated into the baseband equipment, or part of the RF equipment is implemented remotely from the baseband equipment and the remainder integrated into the baseband equipment. For example, in an LTE communication system, a RAN device (eNB) includes baseband equipment and RF equipment. The RF equipment may be located remotely from the baseband equipment. For example, a remote radio unit (RRU) is remotely located relative to the BBU.

[00100] Communication between a RAN device and a terminal follows a specific protocol layer structure. For example, a control plane protocol layer structure may include functions of protocol layers such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, and a physical layer. The user plane protocol layer structure may include functions of protocol layers such as PDCP layer, RLC layer, MAC layer, and physical layer. In an implementation, a service data adaptation protocol (SDAP) layer is further included above the PDCP layer.

[00101] The functions of these protocol layers may be implemented by a single node or may be implemented by multiple nodes. For example, in an evolved structure, a RAN device may include a centralized unit (CU) and a distributed unit (DU). A plurality of DUs may be centrally controlled by one CU. As shown in FIG. 2, CU and DU can be separated based on the wireless network protocol layer. For example, the functions of both the PDCP layer and the layer above the PDCP layer are set on the CU, and the functions of the protocol layers below the PDCP layer, such as the RLC layer and the MAC layer, are set on the DU.

[00102] A RAN device may implement protocol layer functions such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC), and a Media Access Control (MAC) layer using one or more nodes. For example, in an evolved structure, a RAN device may include a centralized unit (CU) and a distributed unit (DU), and a plurality of DUs may be centrally controlled by one CU. As shown in FIG. 2, CU and DU can be separated based on the wireless network protocol layer. For example, the functions of both the PDCP layer and the layer above the PDCP layer are set on the CU, and the functions of the protocol layers below the PDCP layer, such as the RLC layer and the MAC layer, are set on the DU.

[00103] The separation based on the protocol layer is just an example, and the separation may alternatively be performed based on another protocol layer, such as the RLC layer. The functions of both the RLC layer and the protocol layer above the RLC layer are set on the CU, and the function of the protocol layer below the RLC layer is set on the DU. Alternatively, the separation is done at the protocol level. For example, some RLC layer functions and a protocol layer function above the RLC layer are set to the CU, and the remaining RLC layer function and a protocol layer function below the RLC layer are set to the DU. In addition, alternatively, the separation may be performed in a different manner. For example, separation is performed based on delay. The function whose processing time must meet the delay requirement is set to DU, and the function whose processing time must not meet the delay requirement is set to CU.

[00104] In addition, the RF equipment may not be located in the DU, but remotely from the DU, or may be integrated into the DU, or partly located remotely from the DU, and the remainder integrated into the DU. It's not limited here.

[00105] FIG. 3 is another schematic diagram of a network architecture to which an embodiment of this application is applicable. Compared to the architecture shown in FIG. 2, the control plane (CP) and the user plane (UP) of the CU may be separated and implemented using different objects. The different entities are, respectively, a control plane CU entity (CU-CP entity) and a user plane UP entity (CU-UP entity).

[00106] In the above network architecture, signaling generated by a CU may be sent to a terminal using a DU, or signaling generated by a terminal may be sent to a CU using a DU. The DU can transparently signal the terminal or CU by directly encapsulating the signaling at the protocol level without analyzing the signaling. In the following embodiments, if such signaling is enabled between the DU and the terminal, then that the DU sends or receives the signaling includes this scenario. For example, the signaling at the RRC layer or the PDCP layer is finally processed as signaling at the PHY layer and sent to the terminal, or converted from the received signaling at the PHY layer. This architecture can also take into account that the signaling at the RRC layer or the PDCP layer is sent by the DU, or sent by the DU and RF.

[00107] In the above embodiments, the CU is classified as a network device on the RAN side. In addition, alternatively, the CU can be classified as a network device on the side of the CN. It's not limited here.

[00108] The hardware in the following embodiments of this application may be located in a terminal or a network device, depending on the functions implemented by the hardware. When the above CU-DU structure is used, the network device may be a CU node, a DU node, or a RAN device including a CU node and a DU node.

[00109] It should be understood that the above FIG. 1 - fig. 3 are merely exemplary for description, but are not intended to limit this application.

[00110] The solutions in this application may be applicable to a new radio-unlicensed (NR-U) cell. However, this application is not limited. An NR-U cell may correspond to any of the following scenarios:

[00111] Scenario A: Carrier aggregation (CA) is performed between an NR-U cell and an NR cell.

[00112] In this scenario, the NR-U cell is used as the secondary cell (SCell), the NR cell is used as the primary cell (primary cell, PCell), and the NR cell operates in the licensed frequency band. NR-U may be used to perform uplink transmission and downlink transmission, or may be used to perform only downlink transmission. The core network connected to NR-U is the 5G core network (5G-CN).

[00113] Scenario B: Dual connectivity (DC) is performed between an NR-U cell and an LTE cell.

[00114] In this scenario, the NR-U cell is used as the Primary SCG Cell (PSCell), the LTE cell is used as the PCell, and the LTE cell operates in the licensed frequency band. If the core network connected to LTE PCell is an evolved packet core (EPC), or LTE PCell can be connected to both EPC and 5G-CN, LTE PCell can be preferably connected to 5G-CN.

[00115] Scenario C: Independent NR-U configured. In other words, both the uplink and the downlink operate in the unlicensed frequency band.

[00116] In this case, NR-U can operate independently and the connected core network is 5G-CN.

[00117] Scenario D: NR-U independent cell configured. In other words, the uplink operates in the licensed frequency band and the downlink operates in the unlicensed frequency band.

[00118] In this case, the core network connected to the NR-U is a 5G-CN.

[00119] Scenario E: Dual connection is performed between NR cell and NR-U.

[00120] In this case, in this scenario, the NR-U cell is used as the Primary SCG Cell (PSCell), the NR cell is used as the PCell, and the NR cell operates in the licensed frequency band. The core network of PCell is 5G-CN.

[00121] It should be understood that scenarios A through scenario E are merely exemplary for description, but should not represent any limitation to this application.

[00122] In the above, Primary Cell (PCell): A Primary cell is a cell of a master cell group (MCG) that operates in the baseband. The UE is configured to perform an initial connection establishment process or a connection re-establishment process.

[00123] Secondary Cell (SCell): A secondary cell is a cell that provides additional radio resource in addition to a special cell (special cell, SC) if the UE is configured with a CA function.

[00124] Special cell: For dual connected operation, the special cell is a primary MCG cell or a primary secondary SCG cell. Otherwise, the special cell is the primary cell.

[00125] Primary Secondary Cell (PSCell): For dual connection operation, the primary secondary cell is the cell that sends random access when the UE performs synchronous reconfiguration.

[00126] Secondary cell group (SCG): A secondary cell group is a subset of a serving cell that includes a PSCell and another secondary cell for a UE configured with dual connectivity.

[00127] Serving cell (serving cell): For a UE in the RRC_CONNECTED state, if the CA/DC is not configured, there is only one serving cell. If the CA/DC is configured, the serving cell includes the dedicated cell and all secondary cells.

[00128] In an NR-U cell, each communication device, such as a terminal device or a network device, can contend for a resource in an unlicensed frequency band using a listen before talk (LBT) mechanism (or referred to as a monitor before transmission).

[00129] LBT is typically performed in channel granularity (eg, 20 MHz). Before sending a signal (eg, a data signal) on a channel (eg, designated as the first channel), the communication device may first determine whether the first channel is idle. For example, the communication device determines whether the nearest communication device is occupying the first channel to send a signal. The discovery process may be referred to as a clear channel assessment (CCA) process or a channel access process.

[00130] In embodiments of this application, there are at least two channel access processes, referred to as a first type channel access process and a second type channel access process.

[00131] The first type channel access process (which may also be referred to as a fixed duration based channel access process) may be fixed duration based energy detection. If the energy of the signal received by the communication device (the communication device may be a terminal device or a network device) for a fixed duration is less than or equal to the first predefined threshold value for a particular frequency band, for example, 20 MHz, then the channel is considered free, and the communication device can use the free channel for data transmission. Otherwise, the channel is considered to be busy and the communication device does not use the busy channel for data transmission.

[00132] The second type channel access process (which may also be referred to as a backtrack based channel access process) may be an energy detection based backtracking mechanism. The window is defined for a particular frequency band. The window specifies the range of detected slots. The communication device randomly chooses a value of A in a window (or range of values). After the communication device detects at least A free energy detection slots, the channel is considered free and the communication device can use the free channel for data transmission. Otherwise, the channel is considered to be busy and the communication device does not use the busy channel for data transmission. The free energy detection indicates that the energy of the signal received over the fixed duration is less than or equal to the second preset threshold value. The first preset threshold and the second preset threshold may be predetermined, such as predetermined in a protocol. It's not limited. In addition, there is no limiting relationship between the first preset threshold and the second preset threshold, and the first preset threshold and the second preset threshold may be the same or may be different.

[00133] When the channel access process is performed, two results can be obtained: The channel access process is completed, and the channel access process is not completed. There are many start locations in the time domain in the time-frequency resource used for data transmission. If it is determined that the channel is free up to any starting time domain location, the channel access process can be considered to be completed. If it is determined that the channel is busy up to all time domain start locations, the channel access process can be considered to be incomplete.

[00134] In the prior art, a network device may indicate, using one part of the DCI, both a resource used for transmitting downlink data and a resource used for transmitting HARQ feedback for downlink data. However, if the resource used for performing HARQ feedback for downlink data and the resource used for transmitting downlink data are not in the same COT, the terminal device performs a second type channel access process for HARQ feedback, and the implementation of the process is relatively complicated.

[00135] In this regard, the present application provides a transmission method. The network device first configures a dynamically scheduled downlink transmission resource or activates a semi-persistently scheduled downlink transmission resource using the first DCI. Then, the network device sends a second DCI to the terminal device upon completion of the channel access process to indicate the uplink transmission resource used to transmit the HARQ feedback for the downlink data. Compared to that of the prior art, the network device indicates resource allocation based on two parts of the DCI. When allocating resources, the network device performs LBT. This is equivalent to the network device sharing the COT corresponding to the uplink transmission resource with the terminal device. The terminal device receives resources in two packets and shares the LBT effect of the network device. Thus, the terminal device is allowed to perform the first type channel access process, or the terminal device is allowed not to perform the channel access process. Therefore, the terminal device can send feedback information on the uplink resource without performing the second type channel access process in order to simplify the behavior of the terminal device and reduce the implementation complexity.

[00136] The following describes in detail the embodiments of the present application with reference to the accompanying drawings.

[00137] To facilitate understanding of the embodiments of this application, the following few descriptions are provided before the description of the embodiments of this application.

[00138] The uplink transmission resource/downlink transmission resource in this application may include a time domain resource and a frequency domain resource. In the time domain, a time-frequency resource may include one or more time domain units (which may alternatively be referred to as time units). In the frequency domain, a frequency domain resource may include one or more frequency domain units.

[00139] A time domain unit (which may also be referred to as a time unit) may be a symbol, mini-slot (Mini-slot), slot (slot), or subframe (subframe). The duration of a subframe in the time domain may be 1 millisecond (ms). One slot includes seven or 14 characters. One mini-slot may include at least one symbol (eg, two symbols, seven symbols, or 14 symbols, or any number of symbols less than or equal to 14 symbols). The listed sizes of time domain units are only intended to facilitate understanding of the solutions in this application and should not be construed as a limitation of the present invention. It can be understood that the dimensions of the time domain units may be other values. In this application, it is expressly not limited.

[00140] A frequency domain unit can be a physical resource block (PRB), a resource block (RB), a resource block group (RBG), or a predefined subband.

[00141] In the embodiments of this application, the first, second, third, fourth, and various numerical numbers are used merely to distinguish for ease of description and are not used to limit the scope of the embodiments of this application. For example, different DCIs and different serving cell sequences are distinguished.

[00142] In embodiments of this application, "protocol" may be a standard protocol in the field of communications. For example, a "protocol" may include an NR protocol and an associated protocol applicable to a future communication system. In this application, it is expressly not limited.

[00143] In embodiments of this application, "multiple" means two or more, and the other quantitative indicator is similar to this. The term "and/or" describes an association relationship for describing associated objects and represents that three relationships can exist. For example, A and/or B can represent the following three cases: only A exists, both A and B exist, and only B exists. In addition, an element that appears in the singular forms does not mean "one or only one" unless otherwise indicated in the context, but means "one or more". For example, "device" means one or more such devices. In addition, "at least one (at least one of) ..." means one or any combination of subsequent related objects. For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC.

[00144] It should be understood that the transmission method presented in this application may be applicable to a wireless communication system, such as the wireless communication system 100 shown in FIG. 1. The terminal device in the embodiments of this application can communicate with one or more network devices at the same time. For example, the network device in embodiments of this application may correspond to network device 110 in FIG. 1, and the terminal device in the embodiments of this application may correspond to the terminal device 130.

[00145] Without loss of generality, the following describes embodiments of this application in detail using the interaction process between a terminal device and a network device as an example. A terminal device may be any terminal device that resides in a wireless communication system and that is wirelessly interconnected with one or more network devices. It is clear that any terminal device in a wireless communication system can implement wireless communication based on the same technical solution. In this application, it is expressly not limited.

[00146] FIG. 4 is a schematic block diagram of an uplink transmission method 400 according to an embodiment of this application, and is illustrated from a device interaction point of view. As shown in FIG. 4, the method 400 shown in FIG. 4 may include steps S410 to S440. Each stage is described in detail below. It should be understood that method 400 is described using only a terminal device and a network device as agents. During a particular implementation, the terminal device may be replaced by a chip configured in the terminal device, and the network device may be replaced by a chip configured in the network device.

[00147] Step S410: The network device sends the first DCI to the terminal device. Accordingly, the terminal device receives the first DCI sent by the network device.

[00148] The first DCI is used to indicate or activate a downlink transmission resource. The downlink transmission resource may be used for initial transmission or retransmission of data on the downlink.

[00149] It should be noted that the resource for the first DCI transmission and the downlink transmission resource may be located in the same serving cell, the same BWP, or the same subband. Alternatively, the resource for the first DCI transmission and the downlink transmission resource may be located in different serving cells, different BWPs, or different subbands. One cell includes at least one carrier. One carrier includes at least one BWP. One BWP includes at least one subband.

[00150] In this application, the first DCI may be used for dynamic scheduling or semi-persistent scheduling. The two scenarios are described separately below.

[00151] Scenario 1: dynamic scheduling

[00152] In a dynamic scheduling scenario, the first DCI is used to indicate a downlink transmission resource. The downlink transmission resource is, for example, a physical downlink shared channel (PDSCH) resource. In other words, the first DCI may include PDSCH time-frequency resource information. The terminal apparatus may determine the downlink transmission resource or the PDSCH resource based on the time-frequency resource information.

[00153] In an implementation, the first DCI may further include a HARQ process ID (identifier, ID). The terminal device may send HARQ feedback based on the HARQ process ID.

[00154] In an implementation, the first DCI may further include time range indication information. The terminal device may determine the time range based on the indication information. The time range is the time range in which the terminal device expects to receive the second DCI.

[00155] For example, the time range indication information may indicate a start time and an end time of the time range. The terminal device determines the time range based on the start time and end time. Alternatively, the time range indication information may indicate the start time and duration of the time range. The terminal device determines the time range based on the start time and duration. Alternatively, the time range indication information may indicate a duration. The terminal device determines the time range based on the first DCI reception time and duration.

[00156] The time range is the time range in which the terminal device expects to receive the second DCI. The terminal device monitors the downlink control channel in the target time period to obtain the second DCI. The target time period may be a time range or may be part of a time range. In other words, the terminal device may monitor the downlink control channel in the time domain indicated by the first DCI, may wait for the second DCI in the time domain specified by the first DCI, or monitor the downlink control channel in a portion of the time domain with reference to other information to obtain the second DCI. The start time and end time of the target time period are detailed below. Details are not described here.

[00157] Scenario 2: semi-permanent scheduling

[00158] In the semi-persistent scheduling scenario, before step S410, the network device may further send configuration information to the terminal device. In an implementation, the first DCI may include frequency domain information of the downlink transmission resource. The configuration information may be used to configure time domain information of the downlink transmission resource. In another implementation, the first DCI is used to activate the downlink transmission resource. The configuration information may include time domain information of the downlink transmission resource and frequency domain information of the downlink transmission resource. The configuration information may be carried in a radio resource control (RRC) message. However, this is not limited to this embodiment of the present application.

[00159] In an implementation, the downlink transmission resource in a semi-persistent scheduling scenario may be periodic. For example, the downlink transmission resource reappears every N subframes, and the semi-persistent scheduling period is N subframes, where N is a positive integer. The period is just an example and can also be set using a different time domain unit. It should be understood that the downlink transmission resource in a semi-persistent scheduling scenario may not be periodic. In this application, it is expressly not limited.

[00160] Relationships between different semi-persistent scheduling resources and different HARQ process IDs may be predefined in the protocol. For example, the HARQ process ID corresponding to subframe 0, the HARQ process ID corresponding to subframe 10, the HARQ process ID corresponding to subframe 20, and the like. may be pre-specified in the protocol. Both the network device and the terminal device can determine, according to a rule predetermined in the protocol, HARQ process IDs corresponding to downlink data transmission on various semi-persistent scheduling resources.

[00161] Step S420: The network device transmits downlink data on the downlink transmission resource. Accordingly, the terminal device receives downlink data on the downlink transmission resource.

[00162] The terminal device receives the downlink data on the downlink transmission resource, decodes the downlink data to obtain a decoding result: an acknowledgment (ACK) or a negative acknowledgment (NACK), and maintains a correspondence between the decoding result of the downlink data and the HARQ process. ACK indicates that the terminal device is decoding correctly, and NACK indicates that the terminal device is not decoding correctly. It should be noted that ACK and NACK may be at the transport block (TB) level or codeblock (CB) level, and one TB may include multiple CBs.

[00163] Step S430: The network device sends the second DCI to the terminal device. Accordingly, the terminal device receives the second DCI sent by the network device.

[00164] Specifically, after completion of the first type channel access process or the second type channel access process, the network device sends a second DCI to the terminal device to notify the terminal device of the uplink transmission resource. This is equivalent to sharing the appropriate COT with the terminal device. The second DCI is used to indicate the uplink transmission resource. The uplink transmission resource is used to transmit HARQ feedback information (feedback information for short) for the downlink data. The uplink transmission resource may be a physical uplink shared channel (PUSCH) resource or a physical uplink control channel (PUCCH) resource. In this application, it is expressly not limited.

[00165] In this application, the second DCI may indicate that the terminal device is allowed to perform the first type channel access process, or the second DCI may indicate that the terminal device is allowed not to perform the channel access process. Whether the terminal apparatus performs the first type channel access process or the terminal apparatus performs the channel access process may be determined by the terminal apparatus.

[00166] The second DCI may explicitly indicate that the terminal device is allowed to perform the first type channel access process. For example, the second DCI may carry indication information, and the indication information indicates that the terminal apparatus is allowed to perform the first type channel access process. Alternatively, the second DCI may implicitly indicate that the terminal device is allowed to perform the first type channel access process. For example, the second DCI indicates that the terminal device is allowed to perform the first type channel access process. "Second DCI" includes the format (format) DCI and/or RNTI used to scramble the CRC of the second DCI. In other words, if the terminal device receives DCI in a particular (or dedicated) DCI format or a DCI whose CRC is scrambled using a particular RNTI, the terminal device may determine that the network device allows the terminal device to perform the first type channel access process. The specific DCI and/or RNTI format may be configured by the network device. For example, a network device may configure a particular DCI and/or RNTI format with an RRC message.

[00167] Just as the second DCI indicates that the terminal device is allowed to perform the first type channel access process, the second DCI may explicitly or implicitly indicate that the terminal device is allowed not to perform the channel access process. For details, refer to the previous description in which the second DCI indicates that the terminal device is allowed to perform the first type channel access process. Details are not described here again.

[00168] When the second DCI is received, the terminal device may perform a first type channel access process. After the first type channel access process is completed, the terminal device may send feedback information using the uplink transmission resource. Alternatively, when the second DCI is received, the terminal device may send the feedback information using the uplink transmission resource without performing the first type channel access process. It should be noted that the channel bandwidth may be 20 MHz, but the allocated uplink resource may occupy only a portion of the 20 MHz bandwidth. The terminal device performs the channel access process using the channel as a granularity, namely 20 MHz.

[00169] It should also be noted that the serving cell in which the first DCI is transmitted, or the serving cell in which the resource for transmitting the first DCI is located, and the serving cell in which the second DCI is transmitted, or the serving cell in which the resource for transmitting the second DCI is located, may be the same cell or may be different cells.

[00170] In this specification, for ease of understanding, the serving cell in which the first DCI is transmitted is referred to as the first serving cell. The serving cell in which the uplink transmission resource resides is referred to as the second serving cell. The serving cell in which the second DCI is transmitted is referred to as the third serving cell.

[00171] The first serving cell corresponds to the third serving cell, or the first serving cell and the third serving cell are associated. In addition, in order to achieve the goal that the terminal device learns about the serving cell in which the second DCI is received, the network device may configure the correspondence between the first serving cell and the third serving cell, or may preliminarily establish a correspondence between the first serving cell and the third serving cell. For example, the network device may configure the correspondence between the first serving cell and the third serving cell with the RRC message or the first DCI. In another example, the correspondence between the first serving cell and the third serving cell may be indicated in the protocol.

[00172] It should be understood that the second serving cell and the third serving cell may be the same cell or may be different cells. The resource for transmitting the second DCI and the uplink transmission resource allocated using the second DCI may be in the same BWP or in the same subband. Alternatively, the resource for transmitting the second DCI and the uplink transmission resource allocated using the second DCI may be located on different BWPs or different subbands.

[00173] In addition, in the implementation of the second DCI further includes at least one part of the following information:

[00174] (1) Terminal device ID information. For example, the ID may be a cell radio network temporary identifier (C-RNTI) and is used to identify the terminal device. In other words, the network device can indicate, using the terminal device identifier information, to the second DCI, the terminal device to which the second DCI is specific.

[00175] The second DCI may not include terminal device ID information, and the second DCI may be broadcast or multicast.

[00176] (2) First serving cell ID information.

[00177] If multiple serving cells are configured for the terminal device, the network device indicates that the second DCI is specific to the first DCI of the serving cell or serving cells. In other words, the uplink transmission resource indicated by the second DCI is used to perform HARQ feedback on the cell's downlink transmission resource. If the second DCI does not include the first serving cell ID information, the terminal apparatus can determine based on the cell corresponding to the resource for transmitting the second DCI, namely the third serving cell, that the second DCI is the first DCI of the cell. As described above, the correspondence between the first cell and the third cell may be configured using an RRC message or defined in a protocol. Therefore, the terminal device can determine the first serving cell based on the third serving cell.

[00178] (3) Second serving cell ID information.

[00179] The second DCI carries the second serving cell ID information to indicate to the terminal device that the serving cell in which the uplink transmission resource is located is in a certain serving cell.

[00180] If the second DCI does not include the second serving cell ID information, the second serving cell and the downlink transmission resource can be considered to correspond to the same serving cell.

[00181] (4) HARQ process ID information.

[00182] The HARQ process is the HARQ process corresponding to the second DCI. In other words, the uplink transmission resource indicated by the second DCI is used to perform HARQ feedback for HARQ processes.

[00183] One serving cell may include multiple HARQ processes. The network device indicates the HARQ process or HARQ processes for which the second DCI is specific. In this case, the terminal apparatus may perform HARQ feedback based on the HARQ process corresponding to the downlink data scheduled using the first DCI.

[00184] If the second DCI does not include HARQ process ID information, the HARQ process corresponding to the second DCI can be determined by the other three methods.

[00185] Method 1:

[00186] The network device sends configuration information to the terminal device. The configuration information is used to indicate the HARQ processes corresponding to the HARQ feedback performed by the terminal device on the uplink transmission resource indicated by the second DCI. In other words, the network device pre-configures the IDs of these HARQ processes. The terminal device sends to the network device, using the uplink transmission resource configured using the second DCI, HARQ feedbacks of the HARQ processes corresponding to the IDs of those HARQ processes. For example, a network device configures 1/2/3 HARQ processes using RRC signaling. Upon receiving the second DCI, the terminal device sends feedback information of the HARQ 1/2/3 processes to the network device on the uplink transmission resource configured using the second DCI. It should be understood that downlink data scheduled using the first DCI may correspond to one or more 1/2/3 HARQ processes.

[00187] Method 2:

[00188] All HARQ processes corresponding to the second DCI are HARQ processes.

[00189] In other words, after receiving the second DCI, the terminal device sends feedback information for all HARQ processes to the network device. It should be understood that the downlink data scheduled using the first DCI may correspond to one or more of all HARQ processes.

[00190] Method 3:

[00191] The network device configures the maximum number of HARQ processes that can be returned. The terminal device notifies the network device of the HARQ process or HARQ processes that have feedback information.

[00192] (5) Uplink BWP ID information. The uplink BWP is the BWP to which the uplink transmission resource belongs.

[00193] In other words, the uplink BWP ID indicates the BWP on which the uplink transmission resource configured using the second DCI is located. If the uplink BWP indicated by the second DCI is not the currently activated uplink BWP, the terminal device performs an uplink BWP switching process to switch from the activated uplink BWP to the indicated uplink BWP. For example, the terminal device configures four BWPs: BWP 1, BWP 2, BWP 3, and BWP 4, and the currently activated BWP is BWP 1. If the uplink BWP ID specified by the network device is BWP 2, the currently activated BWP switches to BWP 2.

[00194] If the second DCI does not include the uplink BWP ID information, the uplink transmission resource configured using the second DCI is on the currently activated BWP UL.

[00195] (6) Subband ID information. A subband is a subband to which an uplink transmission resource belongs.

[00196] In other words, the subband ID is used to indicate the subband on which the uplink transmission resource is located. The terminal device sends feedback information to the network device in the specified subband.

[00197] If the second DCI does not include subband ID information, the uplink transmission resource and the downlink transmission resource can be considered to correspond to the same subband.

[00198] Finally, the second DCI may include one or more of items (1) - (6), or the second DCI may not include one of items (1) - (6).

[00199] Optionally, in an embodiment of this application, when the terminal device receives the second DCI, if there is no running random access process or the running random access process is completed, the terminal device starts or restarts the BWP inactivity timer (bwp-inactivitytimer) . In addition, when the bwp-inactivitytimer timer expires, the activated downlink BWP switches to the initial downlink BWP or the default downlink BWP. The initial downstream BWP is the BWP used to initiate the initial access. The default downlink BWP is specified by the network device.

[00200] The BWP inactivity timer is started or restarted, the BWP activation time may be extended, and the BWP may be used for data transmission.

[00201] Optionally, in an embodiment of this application, upon receiving the second DCI, the terminal device starts or restarts the secondary cell deactivation timer (scell-deactivationtimer). If scell-deactivationtimer expires, the secondary SCell is deactivated. The timer is used to serve the secondary cells.

[00202] The secondary cell deactivation timer is started or restarted, the SCell deactivation time is increased, and the SCells can be used for data transmission.

[00203] In an embodiment of this application, the CRC of the first DCI may be scrambled using the first RNTI, and the CRC of the second DCI may be scrambled using the second RNTI. The first RNTI may be the same as, or different from, the second RNTI. In this application, it is expressly not limited. The first RNTI and the second RNTI may be dedicated RNTIs and may uniquely identify the terminal device.

[00204] When the first RNTI is the same as the second RNTI, in order to distinguish between the first RNTI and the second RNTI, each of the first DCI and the second DCI may include an indicator bit. The indicator bit is used to distinguish between the first DCI and the second DCI. For example, if the DCI includes an indicator bit, when the value of the indicator bit is 0, this indicates that the DCI in which the indicator bit is located is the first DCI. If the value of the indicator bit is 1, this indicates that the DCI in which the indicator bit is located is the second DCI. The meaning of the indicator bit value can also be reversed. In this application, it is expressly not limited.

[00205] In addition, the second RNTI can be any of the following: C-RNTI, configured scheduling radio network temporary identifier (CS-RNTI), interruption radio network temporary identifier (INT-RNTI), slot format radio network temporary identifier (SFI-RNTI), semi-persistent CSI radio network temporary identifier identifier, SP-CSI-RNTI), transmit power control-physical uplink control channel-radio network temporary identifier (TPC-PUCCH-RNTI), transmit power control-sounding reference signal-radio network temporary identifier, TPC-SRS-RNTI, and modulation and coding scheme-radio network temporary identifier identifier, MCS-RNTI). For the specific meaning of each RNTI, refer to the prior art. Details are not described here. In addition, the second RNTI may alternatively be a newly introduced RNTI, for example, may be an RNTI that may be introduced in a subsequent protocol.

[00206] It should be understood that the first RNTI may also be any of the aforementioned RNTIs.

[00207] Step S440: The terminal device sends feedback information for downlink data on the uplink transmission resource. Accordingly, the network device receives feedback information for the downlink data on the uplink transmission resource.

[00208] The terminal device may send, based on the indication of the second DCI, the stored feedback information including a decoding result (ACK or NACK) of the downlink data to the network device. The terminal device may perform the first type channel access process based on the indication of the second DCI. After completion of the first type channel access process, the terminal device sends the stored feedback information including the decoding result (ACK or NACK) of the downlink data to the network device. Alternatively, after receiving the second DCI, the terminal device does not perform the channel access process, but directly sends the stored feedback information including the decoding result (ACK or NACK) of the downlink data to the network device.

[00209] According to the transmission method provided in this application, the network device indicates resource allocation based on two parts of the DCI. When allocating resources, the network device performs LBT. This is equivalent to the network device sharing the COT corresponding to the uplink transmission resource with the terminal device. The terminal device receives resources in two packets and shares the LBT effect of the network device. Thus, the terminal device is allowed to perform the first type channel access process, or the terminal device is allowed not to perform the channel access process. Therefore, the terminal can send feedback information on the uplink resource without performing the second type channel access process in order to simplify the behavior of the terminal apparatus and reduce the implementation complexity. In addition, since the uplink transmission resource can be flexibly allocated by the second DCI, the network device can flexibly schedule the uplink resource and the downlink resource. This improves resource utilization.

[00210] In an embodiment of this application, the uplink transmission resource and the downlink transmission resource may belong to different COTs. For example, the downlink transmission resource may belong to COT #1 and the uplink transmission resource may belong to COT #2. However, this is not limited in this application.

[00211] For example, FIG. 5 is a schematic diagram of the execution of uplink and downlink transmission using the method according to an embodiment of this application. Referring to FIG. 5, the first DCI is sent in the serving cell #1 (namely, in the example of the first serving cell), and the downlink data resource, namely the downlink transmission resource, is in the serving cell #2. The second DCI is sent in serving cell #3 (namely, in the example of the third serving cell). The uplink transmission resource indicated by the second DCI is in serving cell #4 (namely, in the example of the second serving cell). Before sending the first DCI, the network device must perform the channel access process and send the first DCI and downlink data in the corresponding COT after the channel access is completed. The point in time at which the terminal device receives downlink data corresponds to COT 1 of serving cell #4. Since COT 1 is nearing completion, HARQ feedback cannot be performed in COT 1 and can only be performed in a subsequent COT, such as COT 2. After the second type channel access process is completed, the network device shares COT 2 with the terminal device. Thus, HARQ feedback between COTs is implemented. It should be understood that if four cells in the drawing are the same cell, the first DCI and downlink data may be in COT 1, and the second DCI and HARQ feedback (namely, the feedback information in this application) may be in COT 2.

[00212] Finally, according to the transmission method provided in this application, HARQ feedback between COTs can be implemented.

[00213] The specific implementation of step S430 is described below using an example.

[00214] In a specific implementation of step S430, the terminal device may monitor the downlink control channel in the target time period to obtain the DCI.

[00215] Specifically, the media access control (MAC) entity of the terminal device may monitor the downlink control channel in the target time period to obtain the DCI.

[00216] An implementation may define a time range in which the terminal device waits to receive the second DCI. The time range may be configured by the network device, such as indicated by the first DCI, or may be configured by the network device using other signaling, such as RRC signaling. The time information configured by the network device may include a start time and an end time of a time range, include a start time and a duration, include an end time and a duration, or include a duration. The start time and end time may be preset, may be configured using different signaling, or may be determined by the terminal device in a different way. The determination method is used as an example in the following embodiment. The time range can be used as the activation time. The activation time value is the same as the value of another existing DRX activation time. In other words, the terminal device monitors the PDCCHs of all activated serving cells in the time domain. Alternatively, as an overridden activation time, the terminal device monitors only the PDCCH of a particular activated serving cell in the time domain, namely the PDCCH of the serving cell on which the second DCI can be transmitted. For example, the serving cell is the third serving cell.

[00217] In this case, the DRX activation time includes the target time period, or the DRX activation time does not include the target time period. In other words, the target time period belongs to the DRX activation time, or the target time period does not belong to the DRX activation time. It should be understood that if the DRX activation time includes the target time period, the terminal device monitors the PDCCHs of all activated serving cells in the target time period. If the DRX activation time does not include the target time period, the terminal device monitors the PDCCH of a particular activated serving cell in the target time period, namely the PDCCH of the serving cell in which the second DCI can be transmitted. For example, the serving cell is the third serving cell.

[00218] You can know that the MAC object is not in the activation time (DRX activation time). When the first DCI is expected to be received, the terminal device (which may be, in particular, the terminal device's MAC entity) monitors the PDCCH in the corresponding serving cell to receive the second DCI addressed to the dedicated RNTI (The MAC entity must monitor the PDCCH for the 2nd DCI addressed to the dedicated RNTI in the corresponding serving cell, even if the MAC entity is not in active time when expected.).

[00219] "When expected" indicates a time range or target time period.

[00220] The "corresponding serving cell" is the "first serving cell" in this specification. The first serving cell is the serving cell in which the second DCI is transmitted. For details about the first serving cell, see the previous description. Details are not described here again.

[00221] "Second DCI addressed to dedicated RNTI" indicates that the CRC of the second DCI is scrambled using the dedicated RNTI. The allocated RNTI corresponds to the second RNTI in the preceding description. Please refer to the previous description for details. Details are not described here again.

[00222] In addition, the start time of the target time period may be determined based on the location of the first DCI or the location of the downlink data. For example, the start time of the target time period may be the end location of the first DCI, the end location of the downlink data, or the Xth character after any of the above end locations, where X is a positive integer. Alternatively, the start time of the target time period may be configured by the network device.

[0023] The end time (or called end time) of the target time period may be the time at which the second DCI is received, or may be configured by the network device.

[00224] The network device may pre-configure the start time and/or end time of the time range. For example, the network device may preconfigure the start time and/or end time of the time range with the RRC message. Alternatively, the network device configures the start time and/or end time of the time range using the first DCI. It should be understood that the network device can configure the time range by configuring start time + duration, end time + duration, start time + end time, and the like. The specific configuration method is not limited in this application. The time range is the time range in which the terminal device expects to receive the second DCI. The terminal device monitors the downlink control channel in the target time period to obtain the second DCI. The target time period may be a time range or may be part of a time range. In other words, the terminal device may monitor the downlink control channel in the time range indicated by the first DCI, may wait to receive the second DCI in the time range indicated by the first DCI, or monitor the downlink control channel in a portion of the time range with reference to other information to obtain the second DCI. Below, two scenarios are used as an example for description, namely, the dynamic scheduling scenario and the semi-permanent scheduling scenario.

[00225] Scenario 1: dynamic scheduling

[00226] The first DCI may carry time range indication information. The time range indication information indicates or includes a start time of the time range and an end time of the time range. The terminal device determines the time range based on the start time of the time range and the end time of the time range. Alternatively, the time range indication information indicates or includes a start time and a duration of the time range. The terminal device determines the time range based on the start time and duration. Alternatively, the time range indication information indicates or includes a duration. The terminal determines the time range based on the reception time of the first DCI and the duration indicated using the first DCI.

[00227] The start time of the target time period may be determined based on the end location of the first DCI or the end location of the downlink data, e.g., the Xth symbol after the end location of the first DCI or the end location of the downlink data, where X ≥ 0, X is an integer, and X=0 is the end location of the first DCI or the end location of the downlink data. The value of X may be predefined in the protocol, or may be preconfigured by the network device. For example, the network device may configure the value of X with an RRC message.

[00228] The end time of the target time period can be determined by a variety of methods. For example, if the terminal device receives the second DCI in the time range, the end time of the target time period may be the time at which the second DCI is received. As another example, if the terminal device does not receive the second DCI in the time range, the end time of the target time period is the end time of the time range. In an exemplary implementation, if the terminal device has not detected the second DCI before the end time of the time range, the terminal device may optionally start a retransmission timer (drx-RetransmissionTimer) after the end time and monitor the PDCCH while the retransmission timer is running and receive the DCI that is sent by the network device and used for downlink retransmission.

[00229] For example, FIG. 6 is a schematic diagram of the start time and end time of the target time period in the dynamic scheduling scenario. Referring to FIG. 6, the terminal device starts tracking, from the start time, the PDCCH to transmit the second DCI. The terminal device uses the time at which the terminal device detects the second DCI as the end time of the target time period. After detecting the second DCI, the terminal device may perform HARQ feedback on the uplink transmission resource.

[00230] FIG. 7 is another schematic diagram of the start time and end time of the target time period in the dynamic scheduling scenario. Referring to FIG. 7, the terminal device starts tracking, from the start time, the PDCCH to transmit the second DCI. If the terminal device has not detected the second DCI when the target time period ends, the terminal device starts a retransmission timer.

[00231] Scenario 2: semi-permanent scheduling

[00232] In an implementation, the network device configures the length of the time range. The start time of the time range can be determined using the method of determining the start time of the target time period in Scenario 1. In this case, the start time of the target time period is the same as the start time of the time range. The determination of the end time of the target time period is the same as in the previous description of Scenario 1, and the details are not described here again.

[00233] In another implementation, the network device configures the time range in a semi-persistent scheduling scenario. The network device configures the start time and length of the time range, the start time and end time of the time range, or the end time and length of the time range. The method for determining the start time and end time of the target time period is the same as in the previous scenario 1. Details are not described here again.

[00234] The above describes in detail the transmission method in the embodiments of this application with reference to FIG. 4 - fig. 7. The following describes in detail the apparatuses in the embodiments of this application with reference to FIGS. From 8 to FIG. 10.

[00235] FIG. 8 is a schematic block diagram of a communications apparatus in accordance with an embodiment of this application. As shown in FIG. 8, apparatus 500 may include a transceiver unit 510 and a processing unit 520.

[00236] In an exemplary design, hardware 500 may be a terminal device in method 400 above. For example, hardware 500 may be a terminal device or a chip configured in a terminal device.

[00237] In an exemplary implementation, the transceiver unit 510 is configured to: receive first downlink control information, where the first downlink control information is used to indicate or activate a downlink transmission resource; receive downlink data on a downlink transmission resource; receive second downlink control information, where the second downlink control information is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for downlink data; and send feedback information on the uplink transmission resource.

[00238] Optionally, the transceiver unit 510 is specifically configured to monitor the downlink control channel in the target time period to obtain the second downlink control information. The discontinuous reception DRX activation time includes the target time period, or the discontinuous reception DRX activation time does not include the target time period.

[00239] Optionally, the start time of the target time period is determined based on the end location of the first downlink control information or the end location of the downlink data, or the start time of the target time period is configured by the network device.

[00240] Optionally, the end time of the target time period is the time at which the second downlink control information is received, or the end time of the target time period is configured by the network device.

[00241] Optionally, the first downlink control information includes time range indication information. The time range indication information is used to indicate the time range. The time range is the time range in which the terminal device expects to receive the second downlink control information.

[00242] Optionally, the second downlink control information is used to indicate that the channel access process type of the terminal device is the first type, or the second downlink control information is used to indicate to the terminal device not to perform the channel access process.

[00243] Optionally, the downlink transmission resource and the uplink transmission resource belong to different channel busy times COT in the time domain.

[00244] Optionally, the second downlink control information further includes at least one of the following:

terminal device identifier information;

first serving cell identifier information, where the first serving cell is a cell corresponding to a downlink transmission resource on which the first downlink control information is carried;

second serving cell ID information, where the uplink transmission resource is located in the second serving cell;

HARQ process ID information, where the HARQ process is the HARQ process corresponding to the second downlink control information;

uplink band BWP portion identifier information, where the uplink BWP is the BWP to which the uplink transmission resource belongs; And

subband identifier information, where the subband is the subband to which the uplink transmission resource belongs.

[00245] Optionally, the result of the cyclic redundancy check (CRC) of the first downlink control information is scrambled using the temporary RNTI of the first radio network. The CRC of the second downlink control information is scrambled using the second RNTI. The first RNTI is the same as or different from the second RNTI.

[00246] Optionally, the first RNTI is the same as the second RNTI. Both the first downlink control information and the second downlink control information, respectively, include an indicator bit. The indicator bit is used to distinguish between the first downlink control information and the second downlink control information.

[00247] Optionally, the first serving cell in which the first downlink control information is transmitted corresponds to the third serving cell. The transceiver unit 510 is specifically configured to monitor the downlink control channel in the third serving cell to obtain the second downlink control information.

[00248] Optionally, the mapping between the first serving cell and the third serving cell is configured for the terminal device by the network device, or the mapping between the first serving cell and the third serving cell is set in advance.

[00249] Optionally, the processing unit 520 is configured to: when there is no running random access process or a running random access process is completed, start or restart the BWP inactivity timer of the frequency band; and/or

start or restart the secondary cell deactivation timer, where

the BWP inactivity timer is used to switch the BWP, and the secondary cell deactivation timer is used to deactivate the secondary cell.

[00250] It should be understood that apparatus 500 may correspond to a terminal device in method 400 according to embodiments of this application. The hardware 500 may include blocks configured to perform the method performed by the terminal device in the method 400. In addition, the blocks in the hardware 500 and the aforementioned other operations and/or functions, respectively, are used to implement the respective procedures in the method 400. For the specific process of performing the above respective steps in blocks, refer to the above description with reference to the method embodiment of FIG. 4 - fig. 7. For brevity, the details are not repeated here.

[00251] It should also be understood that when the hardware 500 is a chip configured in a terminal device, the transceiver unit 510 in the hardware 500 may be an input/output interface.

[00252] In another possible embodiment, hardware 500 may be a network device in method 400 above. For example, hardware 500 may be a network device or a chip configured in a network device.

[00253] In an exemplary implementation, the transceiver unit 510 is configured to: send first downlink control information, where the first downlink control information is used to indicate or activate a downlink transmission resource; send downlink data on the downlink transmission resource; send second downlink control information, where the second downlink control information is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for downlink data; and receive feedback information on the uplink transmission resource.

[00254] Optionally, the first downlink control information includes time range indication information. The time range indication information is used to indicate the time range. The time range is the time range in which the terminal device expects to receive the second downlink control information.

[00255] Optionally, the second downlink control information is used to indicate that the channel access process type of the terminal device is the first type, or the second downlink control information is used to indicate to the terminal device not to perform the channel access process.

[00256] Optionally, the downlink transmission resource and the uplink transmission resource belong to a different channel busy time COT in the time domain.

[00257] Optionally, the second downlink control information further includes at least one of the following:

terminal device identifier information;

first serving cell identifier information, where the first serving cell is a cell corresponding to a downlink transmission resource on which the first downlink control information is carried;

second serving cell ID information, where the uplink transmission resource is located in the second serving cell;

hybrid automatic repeat request HARQ process ID information, where the HARQ process is the HARQ process corresponding to the second downlink control information;

uplink band BWP portion identifier information, where the uplink BWP is the BWP to which the uplink transmission resource belongs; And

subband identifier information, where the subband is the subband to which the uplink transmission resource belongs.

[00258] Optionally, the result of the cyclic redundancy check (CRC) of the first downlink control information is scrambled using the temporary RNTI of the first radio network. The CRC of the second downlink control information is scrambled using the second RNTI. The first RNTI is the same as or different from the second RNTI.

[00259] Optionally, the first RNTI is the same as the second RNTI. Both the first downlink control information and the second downlink control information, respectively, include an indicator bit. The indicator bit is used to distinguish between the first downlink control information and the second downlink control information.

[00260] Optionally, the first serving cell in which the first downlink control information is transmitted corresponds to the third serving cell, and the third serving cell is the cell in which the second downlink control information is located.

[00261] Optionally, the mapping between the first serving cell and the third serving cell is configured for the terminal device by the network device, or the mapping between the first serving cell and the third serving cell is set in advance.

[00262] It should be understood that hardware 500 may correspond to a network device in method 400 according to embodiments of this application. The hardware 500 may include blocks configured to perform the method performed by the network device in the method 400. In addition, the blocks in the hardware 500 and the aforementioned other operations and/or functions, respectively, are used to implement the respective procedures in the method 400. For the specific process of performing the above respective steps in blocks, refer to the above description with reference to the method embodiment of FIG. 4 - fig. 7. For brevity, the details are not repeated here.

[00263] It should also be understood that when the hardware 500 is a chip configured in a network device, the transceiver unit 510 in the hardware 500 may be an input/output interface.

[00264] It should be understood that the division into blocks in the above apparatuses is simply a logical separation of functions. In a real implementation, all or some of the blocks may be integrated into the physical object, or may be physically separate. In addition, all blocks in hardware may be implemented in software called by a processing element, or may be implemented in hardware; or some blocks may be implemented in software called by a processing element and some blocks may be implemented in hardware. For example, each block may be an independently located processing element, or may be integrated into a device chip for implementation. Alternatively, each block may be stored in memory in the form of a program to be called by a processing element of the hardware to perform the function of the block. In addition, all or some of the blocks may be combined together or may be implemented independently. The processing element herein may also be referred to as a processor and may be an integrated circuit having signal processing capability. In the implementation process, the steps in the above method or the above blocks may be implemented using a hardware integrated logic circuit of the processing element, or may be implemented in the form of software called by the processing element.

[00265] For example, a block in any of the above devices can be one or more integrated circuits configured to implement the above method, for example, one or more application-specific integrated circuits (Application-Specific Integrated Circuit, ASIC), one or more microprocessors (digital signal processor, DSP), one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), or a combination of at least two integrated circuits. In another example, when the hardware block is implemented in the form of a program called by a processing element, the processing element may be a general purpose processor such as a Central Processing Unit (CPU) or other processor that can call the program. As another example, blocks can be integrated and implemented as a system-on-a-chip (SOC).

[00266] The above receiving unit is a hardware interface circuit and is configured to receive a signal from other hardware. For example, when the hardware is implemented as a chip, the receiving unit is an interface circuit, which is a chip and is configured to receive a signal from another chip or hardware. The above send block is a hardware interface circuit and is configured to send a signal to other hardware. For example, when the hardware is implemented in the form of a chip, the sender is an interface circuit that is a chip and is configured to send a signal to another chip or hardware.

[00267] FIG. 9 is a schematic diagram of the structure of a terminal device according to an embodiment of this application. The terminal device may be the terminal device in the above embodiments, and is configured to implement the operations of the terminal device in the above embodiments. As shown in FIG. 9, the terminal device includes an antenna 810, a radio frequency portion 820, and a signal processing portion 830. The antenna 810 is connected to the RF part 820. In the downlink direction, the RF part 820 receives through the antenna 810 the information sent by the network device and sends the information sent by the network device to the signal processing part 830 for processing. In the upstream direction, the signal processing part 830 processes the information from the terminal device and sends the information to the RF part 820. The RF part 820 processes the information from the terminal device and then sends the processed information to the network device via the antenna 810.

[00268] The signal processing part 830 may include a modem subsystem configured to process data at each layer of the communication protocol. The signal processing portion 830 may further include a central processing subsystem configured to process the operating system and application layer that belong to the terminal device. Moreover, the signal processing portion 830 may further include another subsystem, such as a multimedia subsystem or a peripheral subsystem. The multimedia subsystem is configured to control the camera or screen of the terminal device. The peripheral subsystem is configured to connect to another device. The modem subsystem may be a separate chip. Optionally, the aforementioned hardware used for the terminal device may be located in the modem subsystem.

[00269] The modem subsystem may include one or more processing elements 831, such as one main control CPU and another integrated circuit. In addition, the modem subsystem may further include a storage element 830 and an interface circuit 833. The storage element 830 is configured to store data and a program. However, the program used to execute the methods executed by the terminal device in the above methods may not be stored in the storage element 830, but stored in memory outside the modem subsystem and loaded and used by the modem subsystem when needed for use. The interface circuit 833 is configured to communicate with another subsystem. The above hardware used for the terminal device may be located in a modem subsystem, and the modem subsystem may be implemented by a chip. The microcircuit includes at least one processing element and an interface circuit. The processing element is configured to perform the steps of any of the methods performed by the terminal device. The interface circuit is configured to communicate with other equipment. In an implementation, terminal device blocks that implement the steps of the above methods may be implemented by a program called by a processing element. For example, the device used for the terminal device includes a processing element and a storage element. The processing element calls the program stored in the storage element to execute the methods performed by the terminal device in the above embodiment of the method. The memory element may be a memory element located on the same chip as the processing element, namely an embedded memory element.

[00270] In another implementation, the program used to perform the methods performed by the terminal device in the above methods may be located in a storage element located on a chip other than the processing element chip, namely, in a storage element off the chip. In this case, the processing element calls or downloads a program from the external storage element to the storage element on the chip to call and execute the methods performed by the terminal device in the above method embodiments.

[00271] In yet another implementation, the terminal device blocks that implement the steps in the above methods may be configured as one or more processing elements. These processing elements are located in the modem subsystem. Here, the processing element may be an integrated circuit, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be combined together to form a microchip.

[00272] The terminal device blocks that implement the steps in the above methods can be combined together and implemented in the form of a system-on-a-chip (SOC). The SOC chip is configured to implement the above methods. At least one processing element and a storage element may be integrated into the chip, and the processing element calls the program stored in the storage element to implement the above-mentioned methods performed by the terminal device. Alternatively, at least one integrated circuit may be integrated into the chip to implement the above methods performed by the terminal device. Alternatively, with reference to the above implementations, the functions of some of the blocks may be implemented by a program called by the processing element, and the functions of some of the blocks may be implemented by an integrated circuit.

[00273] It can be recognized that the aforementioned hardware used for a terminal may include at least one processing element and an interface circuit. At least one processing element is configured to perform any of the methods provided in the above method embodiments and executed by the terminal device. The processing element may perform some or all of the steps performed by the terminal device in the first place, namely, by calling the program stored in the storage element; or may perform some or all of the steps performed by the terminal device in a second manner, namely using a hardware integrated logic circuit in a processing element in conjunction with an instruction; or, of course, may perform, by combining the first method and the second method, some or all of the steps performed by the terminal device.

[00274] As described above, the processing element herein may be a general purpose processor, such as a CPU, or may be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, one or more DSP microprocessors, one or more FPGAs, or a combination of at least two integrated circuits.

[00275] A storage element may be a single storage device or may be a generic term for multiple storage elements.

[00276] FIG. 10 is a schematic diagram of the structure of a network device according to an embodiment of this application. Fig. 10 is a schematic diagram of the structure of a network device according to an embodiment of this application. The network device is configured to implement the operations of the network device in the above embodiments. As shown in FIG. 10, the network device includes an antenna 901, RF equipment 902, and baseband equipment 903. The antenna 901 is connected to the RF device 902. In the uplink direction, the RF equipment 902 receives, using the antenna 901, the information sent by the terminal and sends the information sent by the terminal to the baseband equipment 903 for processing. In the downlink direction, the baseband apparatus 903 processes the information from the terminal and sends the information to the RF apparatus 902. The RF apparatus 902 processes the information from the terminal and then sends the processed information to the terminal using the antenna 901.

[00277] Baseband hardware 903 may include one or more processing elements 9031, such as one main control CPU and another integrated circuit. In addition, the baseband apparatus 903 may further include a storage element 9032 and an interface 9033. The storage element 9032 is configured to store program and data. Interface 9033 is configured to communicate with RF device 902, and the interface is, for example, a common public radio interface (CPRI). The above apparatus used for the network device may be located in the base band apparatus 903 . For example, the aforementioned hardware used for the network device may be a chip on the baseband hardware 903. The microcircuit includes at least one processing element and an interface circuit. The processing element is configured to perform the steps of any of the methods performed by the network device. The interface circuit is configured to communicate with other equipment. In an implementation, the network device blocks that implement the steps in the above methods may be implemented by a program called by a processing element. For example, the hardware used for a network device includes a processing element and a storage element. The processing element calls the program stored in the storage element to execute the methods performed by the network device in the above method embodiments. The storage element may be a storage element located on the same chip as the processing element, namely an embedded storage element, or may be a storage element located on a chip different from the processing element chip, namely an off-chip storage element.

[00278] In another implementation, the network device blocks that implement the steps in the above methods may be configured as one or more processing elements. These processing elements are located in the base band equipment. Here, the processing element may be an integrated circuit, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be combined together to form a microchip.

[00279] The network device blocks that implement the steps in the above methods can be combined together and implemented in the form of a system-on-a-chip (SOC). For example, the baseband equipment includes an SOC chip configured to implement the above methods. At least one processing element and a storage element may be integrated into the chip, and the processing element calls the program stored in the storage element to implement the above methods performed by the network device. Alternatively, at least one integrated circuit may be integrated into the chip to implement the above methods performed by the network device. Alternatively, with reference to the above implementations, the functions of some of the blocks may be implemented by a program called by the processing element, and the functions of some of the blocks may be implemented by an integrated circuit.

[00280] It can be recognized that the aforementioned hardware used for a network device may include at least one processing element and an interface circuit. At least one processing element is configured to perform any of the methods provided in the above method embodiments and performed by the network device. The processing element may perform some or all of the steps performed by the network device in the first place, namely, by calling a program stored in the storage element; or may perform some or all of the steps performed by the network device in a second manner, namely using a hardware integrated logic circuit in a processing element in conjunction with an instruction; or, of course, may perform, by combining the first method and the second method, some or all of the steps performed by the network device.

[00281] As described above, the processing element herein may be a general purpose processor, such as a CPU, or may be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, one or more DSP microprocessors, one or more FPGAs, or a combination of at least two integrated circuits.

[00282] A storage element may be a single memory or may be a generic term for multiple storage elements.

[00283] An embodiment of this application further provides processing hardware including a processor and an interface. The processor is configured to execute the transmission method in the above method embodiments.

[00284] It should be understood that the processing hardware may be a microchip. For example, the processing hardware may be a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD), or other integrated microchip.

[00285] During implementation, the steps of the above methods may be implemented using a hardware integrated logic circuit in a processor or with instructions in the form of software. The steps of the method disclosed with reference to embodiments of this application may be performed directly by a hardware processor or may be performed using a combination of hardware in the processor and a software module. The program module may be located on a mature storage medium of the art, such as random access memory, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, or a register. The storage medium is located in the memory and the processor reads the information in the memory and performs the steps of the above methods in conjunction with the processor hardware. To avoid repetition, details are again omitted here.

[00286] It should be noted that the processor in embodiments of this application may be an integrated circuit chip and has signal processing capability. During implementation, the steps in the above method embodiments may be implemented using a hardware integrated logic circuit in a processor or using instructions in the form of software. The processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistorized logic device, or a discrete hardware component. It may implement or perform the methods, steps, and flowcharts that are disclosed in the embodiments of this application. A general purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like. The steps of the methods disclosed with reference to embodiments of this application may be directly executed and completed by a hardware decode processor, or may be performed and completed using a combination of hardware and software modules in a decode processor. The software module may be located on a mature storage medium in the art, such as RAM, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, or a register. The storage medium is located in the memory and the processor reads the information in the memory and performs the steps of the above methods in conjunction with the processor hardware.

[00287] It can be understood that the memory in the embodiments of this application may be volatile memory or non-volatile memory, or may include volatile memory and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), or flash memory. Volatile memory can be random access memory (RAM) used as an external cache. By way of example and not limitation, RAM can be used in many forms, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous RAM, DRAM). DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), improved synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronized dynamic random access memory (synchlink DRAM, SLDRAM), and rambus direct RAM (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described in this specification includes, but is not limited to, any other suitable type of memory.

[00288] In accordance with the method presented in the embodiments of this application, this application further provides a computer program product. The computer program product includes computer program code. When the computer program code is run on the computer, the computer is enabled to execute the method in any of the embodiments shown in FIG. 4 - fig. 7.

[00289] According to the method provided in the embodiments of this application, this application further provides a computer-readable medium. A computer-readable medium stores program code. When the program code is run on the computer, the computer is enabled to execute the method in any of the embodiments shown in FIG. 4 - fig. 7.

[00290] According to the method provided in the embodiments of this application, this application further provides a system. The system includes one or more of the aforementioned terminal devices and one or more network devices.

[00291] All or some of the above embodiments may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, all or some of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When computer instructions are downloaded and executed on the computer, the procedure or functions according to the embodiments of this application are generated in whole or in part. The computer may be a general purpose computer, a specialized computer, a computer network, or other programmable devices. The computer instructions may be stored on a computer-readable storage medium or may be transferred from a computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, or microwave) method. Computer-readable media can be any usable media that is accessible to a computer, or a storage device, such as a server or data center, that combines one or more usable media. The medium used may be a magnetic medium (for example, a floppy disk, hard disk, or magnetic tape), an optical medium (for example, a high-density digital video disc (DVD)), a semiconductor medium (for example, a solid-state drive (SSD)) or the like.

[00292] The network device and the terminal device in the above hardware embodiments fully correspond to the network device and the terminal device in the method embodiments. The corresponding module or block performs the corresponding step. For example, a communication unit (transceiver) performs a receive step or a send step in method embodiments, and a processing unit (processor) may perform a different step than a send step and a receive step. For information about the functions of a particular block, see the respective embodiments of the method. There may be one or more processors.

[00293] Terms such as "component", "module", and "system" used in this specification are used to refer to computer-related objects, hardware, firmware, combinations of hardware and software, software, or executable software. For example, a component may be, but is not limited to being, a process that runs on a processor, processor, object, executable, thread of execution, program, and/or computer. As shown in the figures, both the computing device and the application running on the computing device can be components. One or more components may be in a process and/or thread of execution, and a component may be located on one computer and/or distributed between two or more computers. In addition, these components can be executed from various computer-readable media that store various data structures. For example, components can communicate using a local and/or remote process and, for example, in accordance with a signal having one or more data packets (for example, data from two components interacting with another component in a local system, a distributed system, and/or through a network such as the Internet, interacting with other systems using a signal).

[00294] One skilled in the art may be aware that, in combination with the examples described in the embodiments disclosed herein, the blocks and steps of an algorithm may be implemented using electronic hardware or a combination of computer software and electronic hardware. The performance of functions by hardware or software depends on the specific applications and the state of the design constraints of the technical solutions. A person skilled in the art can use various methods to implement the described functions for each particular application, but such an implementation should not be considered to be outside the scope of this application.

[00295] One skilled in the art can clearly understand that for the purposes of a convenient and concise description of the detailed working process of the aforementioned system, apparatus, and unit, reference should be made to the corresponding process in the aforementioned method embodiments, and details are omitted here again.

[00296] In several embodiments provided herein, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the described embodiment of the apparatus is merely an example. For example, block division is simply a division of logical functions and may be another division in a real implementation. For example, many blocks or components may be combined or integrated into another system, or certain functions may be ignored or not performed. In addition, the interconnections or direct links or communication connections shown or described may be implemented using certain interfaces. Indirect connections or communication connections between apparatuses or units can be implemented electrically, mechanically, or take other forms.

[00297] Blocks described as separate parts may or may not be physically separate, and parts shown as blocks may or may not be physical blocks, may be located in the same location, or may be distributed over multiple network blocks. Some or all of the blocks may be selected based on actual requirements in order to achieve the objectives of the decisions in the mentioned embodiments.

[00298] In addition, the functional blocks in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units are integrated into one unit.

[00299] When the functions are implemented in the form of a software functional block and sold or used as a standalone product, the functions may be stored on a computer-readable storage medium. Based on this understanding, the essence of the technical solutions in this application, or the part that contributes to the prior art, or some of the technical solutions can be implemented in the form of a software product. The computer program product is stored on a storage medium and includes several instructions for directing a computing device (which may be a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the embodiments of this application. The above storage medium includes: any medium that can store program code, such as a USB flash drive, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk.

[00300] The above description is only specific implementations of this application, but is not intended to limit the scope of protection of this application. Any change or replacement readily detectable by a person skilled in the art within the technical scope disclosed in this application should/should fall within the scope of this application. Therefore, the scope of protection of this application should be consistent with the scope of protection of the claims.

Claims (56)

1. A method for transmitting feedback information, comprising: receiving first downlink control information, wherein the first downlink control information is used to indicate or activate a downlink transmission resource; receiving downlink data in the downlink transmission resource; receiving second downlink control information in a target time period, wherein the second downlink control information is used to indicate an uplink transmission resource, wherein the uplink transmission resource is used to transmit feedback information for downlink data, the target time period being contained in Discontinuous Reception Activation Time (DRX), and the start time of the target time period is determined based on the end location of the downlink transmission resource; And sending feedback information in the uplink transmission resource. 2. The method of claim 1, wherein the end time of the target time period is the time at which the second downlink control information is received, or the end time of the target time period is configured by the network device. 3. The method according to claim 1 or 2, wherein the first downlink control information contains time range indication information, wherein the time range indication information is used to indicate the time range, and wherein the time range is a time range in which the terminal device expects to receive the second downlink control information, the target time period being said time range or part of said time range. 4. The method according to any one of paragraphs. 1-3, in which the second downlink control information is used to indicate that the channel access process type of the terminal device is the first type, or the second downlink control information is used to indicate that the terminal device does not perform the channel access process. 5. The method according to any one of paragraphs. 1-4, in which the downlink transmission resource and the uplink transmission resource belong to different channel busy time (COT) in the time domain. 6. The method according to any one of paragraphs. 1-5, wherein the second downlink control information further comprises at least one of the following: terminal device identifier information; first serving cell identifier information, wherein the first serving cell is a cell corresponding to a downlink transmission resource in which the first downlink control information is carried; second serving cell ID information, wherein the uplink transmission resource is located in the second serving cell; hybrid automatic repeat request (HARQ) process ID information, the HARQ process being the HARQ process corresponding to the second downlink control information; uplink part band identifier (BWP) information, where BWP is the BWP to which the uplink transmission resource belongs; And subband identifier information, wherein the subband is the subband to which the uplink transmission resource belongs. 7. The method according to any one of paragraphs. 1-6, wherein the result of the cyclic redundancy check (CRC) of the first downlink control information is scrambled using the first radio network temporary identifier (RNTI), the CRC of the second downlink control information is scrambled using the second RNTI, and the first RNTI is the same as or different from the second RNTI. 8. The method of claim 7, wherein the first RNTI is the same as the second RNTI, and the first downlink control information and the second downlink control information, respectively, comprise an indicator bit, and the indicator bit is used to distinguish between the first downlink control information and the second downlink control information. 9. The method according to any one of paragraphs. 1-8, in which the first serving cell in which the first downlink control information is transmitted corresponds to the third serving cell; And said reception of the second downlink control information comprises: monitoring the downlink control channel in the third serving cell to obtain the second downlink control information. 10. The method of claim 9, wherein the correspondence between the first serving cell and the third serving cell is configured for the terminal device by the network device, or the correspondence between the first serving cell and the third serving cell is predetermined. 11. The method according to any one of paragraphs. 1-10, further comprising the steps of: when there is no running random access process or a running random access process is completed, starting or restarting a partial band inactivity (BWP) timer; and/or start or restart the deactivation timer of the secondary cell, while the BWP inactivity timer is used to switch the BWP, and the secondary cell deactivation timer is used to deactivate the secondary cell. 12. A method for transmitting feedback information, comprising: sending first downlink control information, wherein the first downlink control information is used to indicate or activate a downlink transmission resource; sending downlink data in the downlink transmission resource; sending second downlink control information in a target time period, wherein the second downlink control information is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for downlink data, the target time period is contained in a Discontinuous Reception Activation Time (DRX), and the start time of the target time period is determined based on the end location of the downlink transmission resource; And receiving feedback information on the uplink transmission resource. 13. The method of claim 12, wherein the first downlink control information comprises time range indication information, wherein the time range indication information is used to indicate the time range, and wherein the time range is a time range in which the terminal device expects to receive the second downlink control information, wherein the target time period is said time range or a portion of said time range. 14. The method of claim 12 or 13, wherein the second downlink control information is used to indicate that the channel access process type of the terminal device is the first type, or the second downlink control information is used to indicate that the terminal device is not performing a channel access process. 15. The method according to any one of paragraphs. 12-14, in which the downlink transmission resource and the uplink transmission resource belong to different channel busy time (COT) in the time domain. 16. The method according to any one of paragraphs. 12-15, wherein the second downlink control information further comprises at least one of the following: terminal device identifier information; first serving cell identifier information, wherein the first serving cell is a cell corresponding to a downlink transmission resource in which the first downlink control information is carried; second serving cell ID information, wherein the uplink transmission resource is located in the second serving cell; hybrid automatic repeat request (HARQ) process ID information, the HARQ process being the HARQ process corresponding to the second downlink control information; uplink part band identifier (BWP) information, the BWP being the BWP to which the uplink transmission resource belongs; And subband identifier information, wherein the subband is the subband to which the uplink transmission resource belongs. 17. The method according to any one of paragraphs. 12-16, in which the result of the cyclic redundancy check (CRC) of the first downlink control information is scrambled using the first radio network temporary identifier (RNTI), the CRC of the second downlink control information is scrambled using the second RNTI, and the first RNTI is the same as or different from the second RNTI. 18. The method of claim 17, wherein the first RNTI is the same as the second RNTI, and the first downlink control information and the second downlink control information, respectively, comprise an indicator bit, and the indicator bit is used to distinguish between the first downlink control information and the second downlink control information. 19. The method according to any one of paragraphs. 12-18, in which the first serving cell in which the first downlink control information is transmitted corresponds to the third serving cell, and the third serving cell is the cell in which the second downlink control information is located. 20. The method of claim 19, wherein the mapping between the first serving cell and the third serving cell is configured by the network device to the terminal device, or the mapping between the first serving cell and the third serving cell is set in advance. 21. Communication equipment containing blocks configured to perform the steps of the method according to any one of paragraphs. 1-11. 22. Communication equipment comprising a processor and an interface circuit, wherein the processor is configured to communicate with a network device via the interface circuit and perform the method according to any one of paragraphs. 1-11. 23. Communication equipment containing a processor, and the processor is configured to connect to the memory, as well as to read and execute a program stored in the memory, to implement the method according to any one of paragraphs. 1-11. 24. Terminal device containing the equipment according to any one of paragraphs. 21-23. 25. Communication equipment containing blocks configured to perform the steps of the method according to any one of paragraphs. 12-20. 26. Communication equipment comprising a processor and an interface circuit, wherein the processor is configured to communicate with the terminal device via the interface circuit and perform the method according to any one of paragraphs. 12-20. 27. Communication equipment containing a processor, and the processor is configured to connect to the memory, as well as to read and execute a program stored in the memory, to implement the method according to any one of paragraphs. 12-20. 28. Network device containing the equipment according to any one of paragraphs. 25-27. 29. A computer-readable medium containing a computer program, wherein when the computer program is executed in the processor, the processor is provided with the method according to any one of paragraphs. 1-11. 30. A computer-readable medium containing a computer program, wherein when the computer program is executed in the processor, the processor is provided with the method according to any one of paragraphs. 12-20.

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