Communication method and communication device

Abstract

The present application provides a communication method and communication apparatus. The method includes: a terminal device receiving one or more first downlink control information (DCI), the one or more first DCIs used to indicate N TCI states, the N TCI states being valid TCI states, where N is a positive integer; within the validity period of the N TCI states, the terminal device receiving a second DCI, the second DCI used to indicate scheduling information for a first data channel; and the terminal device sending or receiving the first data channel based on at least one TCI state among the N TCI states. This method can improve the flexibility of beam indication.

Description

Technical Field

[0001] The present application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0002] With the development of mobile communication technology, the transmission mechanism based on beamforming technology has been applied to the fifth generation (5G) th In the 5G New Radio (NR) mobile communication system. At present, the standard protocol of the 5G New Radio (NR) system specifies the indication method of the transmit beam and receive beam of different signals and channels. For example, for a data channel (for example, the data channel can be a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH)), the downlink control information (DCI) used to schedule the data channel indicates the beam used to receive or send the data channel. However, this indication method has high requirements for the terminal device, requiring the terminal device to switch to the corresponding beam to receive or send the data channel according to the indication of the DCI after reading the DCI, and is not suitable for low-capability terminal devices. Alternatively, the DCI and the data channel it schedules need to maintain a sufficiently large time interval to enable the terminal device to complete the switching, and the scheduling flexibility is low. In addition, the current beam indication method cannot flexibly indicate the different beams when multiple transmit-receive points (TRP) provide services to the terminal device. Therefore, the current beam indication method has some defects. Summary of the Invention

[0003] The embodiments of the present application provide a communication method and a communication device, which can improve the flexibility of beam indication.

[0004] In a first aspect, a communication method is provided, which can be executed by a terminal device or a module (such as a chip) configured in (or used for) the terminal device.

[0005] The method includes: a terminal device receives one or more first downlink control information DCIs, where the one or more first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; within the validity period of the N TCI states, the terminal device receives a second DCI, where the second DCI is used to indicate scheduling information of a first data channel; and the terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states.

[0006] According to the above scheme, the flexibility of beam indication can be improved, so that the terminal device can determine the candidate receiving or transmitting beam for receiving or sending the data channel before the data channel is scheduled.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0008] According to the above scheme, the second DCI can further indicate the TCI status of the data channel used to receive or send the second DCI scheduling in the effective beam, which can flexibly indicate the TCI status actually used and reduce unnecessary overhead of the terminal device.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the first indication field includes at least one bit, the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the terminal device receives the second DCI, including: the terminal device receives the second DCI according to the N TCI states.

[0011] According to the above scheme, during the effective period of the effective TCI state, downlink control information is received and sent according to the effective TCI state, avoiding the network device indicating the reference TCI state of the transmitting beam and the reference TCI state of the receiving beam of each channel and / or signal one by one, which can reduce signaling overhead and reduce implementation complexity.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the terminal device receives the second DCI based on a first TCI state, wherein the first TCI state is one of the N TCI states, and the first TCI state is predefined by the protocol or preconfigured by the network.

[0013] According to the above solution, the power consumption of the terminal device can be reduced by using the default TCI state (ie, the first TCI state) in the effective TCI state to receive DCI.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the N TCI states correspond to N transmission resources, the second DCI comes from at least one of the N transmission resources, and the first data channel comes from at least one of the N transmission resources.

[0015] Optionally, the transmission resource may be an antenna panel or a transmitting and receiving point of a network device.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device determines the number of the first data channels based on the number of TCI states included in the at least one TCI state.

[0017] In combination with the first aspect, in certain implementations of the first aspect, at least one of the one or more first DCIs is a dedicated DCI for indicating the effective TCI state, or at least one of the one or more first DCIs is also used to indicate scheduling information of the second data channel.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0019] According to the above scheme, the DCI used to schedule the data channel may include an indication field for indicating the effective TCI state, so that the terminal device can determine the effective TCI state while determining the scheduling information of the scheduled data channel.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the first data channel is a physical downlink shared channel PDSCH, and the terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states, including: the terminal device receives the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and the terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states, including: the terminal device sends the PUSCH according to the at least one TCI state.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states, including: the terminal device sends the first data channel according to the transmit beam or the corresponding transmit spatial filter corresponding to the reference signal indicated by the at least one TCI state, and / or the terminal device receives the first data channel according to the receive beam or the corresponding receive spatial filter corresponding to the reference signal indicated by the at least one TCI state.

[0022] In a second aspect, a communication method is provided, which can be executed by a network device or a module (such as a chip) configured in (or used for) a network device.

[0023] The method includes: sending one or more first downlink control information DCIs to a terminal device, where the one or more first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; within the validity period of the N TCI states, sending a second DCI, where the second DCI is used to indicate scheduling information of a first data channel; and sending or receiving the first data channel according to at least one TCI state among the N TCI states.

[0024] In combination with the second aspect, in certain implementations of the second aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0025] In combination with the second aspect, in certain implementations of the second aspect, the first indication field includes at least one bit, the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0026] In combination with the second aspect, in certain implementations of the second aspect, sending the second DCI includes: sending the second DCI according to the N TCI states, or sending the second DCI according to a first TCI state among the N TCI states, wherein the first TCI state is predefined by the protocol or preconfigured by the network.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the N TCI states correspond to N transmitting and receiving points TRP, the second DCI is sent by at least one of the N TRPs, and the first data channel is sent by at least one of the N TRPs.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the one or more first DCIs include at least one first DCI that is a dedicated DCI for indicating the effective TCI state, or the one or more first DCIs include at least one first DCI for indicating scheduling information of the second data channel.

[0029] In combination with the second aspect, in certain implementations of the second aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0030] In combination with the second aspect, in certain implementations of the second aspect, the first data channel is a physical downlink shared channel PDSCH, and sending or receiving the first data channel according to at least one TCI state of the N TCI states includes: sending the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and sending or receiving the first data channel according to at least one TCI state of the N TCI states includes: receiving the PUSCH according to the at least one TCI state.

[0031] In combination with the second aspect, in certain implementations of the second aspect, sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: sending the first data channel according to a transmitting beam corresponding to a reference signal indicated by the at least one TCI state, and / or receiving the first data channel according to a receiving beam corresponding to a reference signal indicated by the at least one TCI state.

[0032] In a third aspect, a communication device is provided, including a memory, a transceiver, and a processor:

[0033] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0034] Receive one or more first downlink control information DCIs, where the one or more first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; within the validity period of the N TCI states, receive a second DCI, where the second DCI is used to indicate scheduling information of a first data channel; and send or receive the first data channel according to at least one TCI state among the N TCI states.

[0035] In combination with the third aspect, in certain implementations of the third aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0036] In combination with the third aspect, in certain implementations of the third aspect, the first indication field includes at least one bit, and the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0037] In combination with the third aspect, in certain implementations of the third aspect, receiving the second DCI includes: receiving the second DCI according to the N TCI states, or receiving the second DCI according to the first TCI state, wherein the first TCI state is one of the N TCI states, and the first TCI state is predefined by the protocol or preconfigured by the network.

[0038] In combination with the third aspect, in certain implementations of the third aspect, the N TCI states correspond to N transmission resources, the second DCI comes from at least one of the N transmission resources, and the first data channel comes from at least one of the N transmission resources.

[0039] In combination with the third aspect, in certain implementations of the third aspect, the method further includes: determining the number of the first data channels based on the number of TCI states included in the at least one TCI state.

[0040] In combination with the third aspect, in certain implementations of the third aspect, at least one of the one or more first DCIs is a dedicated DCI for indicating the effective TCI state, or at least one of the one or more first DCIs is also used to indicate scheduling information of the second data channel.

[0041] In combination with the third aspect, in certain implementations of the third aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0042] In combination with the third aspect, in certain implementations of the third aspect, the first data channel is a physical downlink shared channel PDSCH, and the sending or receiving of the first data channel according to at least one TCI state of the N TCI states includes: receiving the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and the sending or receiving of the first data channel according to at least one TCI state of the N TCI states includes: sending the PUSCH according to the at least one TCI state,

[0043] In combination with the third aspect, in certain implementations of the third aspect, sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: sending the first data channel according to a transmitting beam or a corresponding transmitting spatial filter corresponding to a reference signal indicated by the at least one TCI state, and / or receiving the first data channel according to a receiving beam or a corresponding receiving spatial filter corresponding to a reference signal indicated by the at least one TCI state.

[0044] In a fourth aspect, a communication device is provided, including a memory, a transceiver, and a processor:

[0045] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0046] One or more first downlink control information DCIs are sent to the terminal device, where the one or more first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; within the validity period of the N TCI states, a second DCI is sent, where the second DCI is used to indicate scheduling information of the first data channel; and according to at least one TCI state among the N TCI states, the first data channel is sent or received.

[0047] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0048] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first indication field includes at least one bit, the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0049] In combination with the fourth aspect, in certain implementations of the fourth aspect, sending the second DCI includes: sending the second DCI according to the N TCI states, or sending the second DCI according to a first TCI state among the N TCI states, wherein the first TCI state is predefined by the protocol or preconfigured by the network.

[0050] In combination with the fourth aspect, in certain implementations of the fourth aspect, the N TCI states correspond to N transmitting and receiving points TRP, the second DCI is sent by at least one of the N TRPs, and the first data channel is sent by at least one of the N TRPs.

[0051] In combination with the fourth aspect, in certain implementations of the fourth aspect, the one or more first DCIs include at least one first DCI that is a dedicated DCI for indicating the effective TCI state, or the one or more first DCIs include at least one first DCI for indicating scheduling information of the second data channel.

[0052] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0053] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first data channel is a physical downlink shared channel PDSCH, and sending or receiving the first data channel according to at least one TCI state of the N TCI states includes: sending the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and sending or receiving the first data channel according to at least one TCI state of the N TCI states includes: receiving the PUSCH according to the at least one TCI state.

[0054] In combination with the fourth aspect, in certain implementations of the fourth aspect, sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: sending the first data channel according to a transmitting beam corresponding to a reference signal indicated by the at least one TCI state, and / or receiving the first data channel according to a receiving beam corresponding to a reference signal indicated by the at least one TCI state.

[0055] In a fifth aspect, a communication device is provided, which includes: a transceiver unit for receiving one or more first downlink control information DCI, where the first DCI is used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; the transceiver unit is also used to receive a second DCI within the validity period of the N TCI states, where the second DCI is used to indicate scheduling information of a first data channel; a processing unit for determining at least one TCI state among the N TCI states; the transceiver unit is also used to send or receive the first data channel according to the at least one TCI state.

[0056] In combination with the fifth aspect, in certain implementations of the fifth aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0057] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first indication field includes at least one bit, and the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0058] In combination with the fifth aspect, in certain implementations of the fifth aspect, the transceiver unit is specifically used to receive the second DCI based on the N TCI states, or the transceiver unit is specifically used to receive the second DCI based on the first TCI state, wherein the first TCI state is one of the N TCI states, and the first TCI state is predefined by the protocol or preconfigured by the network.

[0059] In combination with the fifth aspect, in certain implementations of the fifth aspect, the N TCI states correspond to N transmission resources, the second DCI comes from at least one of the N transmission resources, and the first data channel comes from at least one of the N transmission resources.

[0060] In combination with the fifth aspect, in certain implementations of the fifth aspect, the processing unit is further used to determine the number of the first data channels based on the number of TCI states included in the at least one TCI state.

[0061] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first DCI is a dedicated DCI for indicating the effective TCI state, or the first DCI is used to indicate scheduling information of the second data channel.

[0062] In combination with the fifth aspect, in certain implementations of the fifth aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0063] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first data channel is a physical downlink shared channel PDSCH, and the transceiver unit is specifically configured to receive the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and the transceiver unit is specifically configured to send the PUSCH according to the at least one TCI state.

[0064] In combination with the fifth aspect, in certain implementations of the fifth aspect, the transceiver unit is specifically used to send the first data channel according to the transmitting beam or the corresponding transmitting spatial filter corresponding to the reference signal indicated by the at least one TCI state, and / or the transceiver unit is specifically used to receive the first data channel according to the receiving beam or the corresponding receiving spatial filter corresponding to the reference signal indicated by the at least one TCI state.

[0065] In the sixth aspect, a communication device is provided, which includes: a transceiver unit for sending one or more first downlink control information DCI to a terminal device, the one or more first DCIs being used to indicate N TCI states, the N TCI states being valid TCI states, and N being a positive integer; the transceiver unit is also used to send a second DCI within the validity period of the N TCI states, the second DCI being used to indicate scheduling information of a first data channel; a processing unit for determining at least one TCI state among the N TCI states; the transceiver unit is also used to send or receive the first data channel according to the at least one TCI state.

[0066] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second DCI includes a first indication field, and the first indication field is used to indicate the at least one TCI state.

[0067] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first indication field includes at least one bit, and the at least one bit indicates a first value, and the first value corresponds to the at least one TCI state.

[0068] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to send the second DCI according to the N TCI states, or the transceiver unit is specifically used to send the second DCI according to the first TCI state among the N TCI states, wherein the first TCI state is predefined by the protocol or preconfigured by the network.

[0069] In combination with the sixth aspect, in certain implementations of the sixth aspect, the N TCI states correspond to N transmitting and receiving points TRP, the second DCI is sent by at least one of the N TRPs, and the first data channel is sent by at least one of the N TRPs.

[0070] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first DCI is a dedicated DCI for indicating the effective TCI state, or the first DCI is used to indicate scheduling information of the second data channel.

[0071] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second DCI state also includes a second indication field, which is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer.

[0072] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first data channel is a physical downlink shared channel PDSCH, and the transceiver unit is specifically used to send the PDSCH according to the at least one TCI state, or the first data channel is a physical uplink shared channel PUSCH, and the transceiver unit is specifically used to receive the PUSCH according to the at least one TCI state.

[0073] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to send the first data channel according to the transmitting beam corresponding to the reference signal indicated by the at least one TCI state, and / or the transceiver unit is specifically used to receive the first data channel according to the receiving beam corresponding to the reference signal indicated by the at least one TCI state.

[0074] In the seventh aspect, a processor-readable storage medium is provided, which stores a computer program, and the computer program is used to enable the processor to execute the method in the above-mentioned first aspect or second aspect and any possible implementation of the first aspect or second aspect.

[0075] In an eighth aspect, a computer program product is provided, which includes: computer program code (or instructions), which, when executed by one or more processors, enables a device including the processor to perform the method in the above-mentioned first aspect or second aspect and any possible implementation of the first aspect or second aspect.

[0076] In the ninth aspect, a communication system is provided, which includes a terminal device that executes the method of the above-mentioned first aspect and any possible implementation method of the first aspect, and the system also includes a network device that executes the method of the above-mentioned second aspect and any possible implementation method of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 is a schematic architecture diagram of a communication system applicable to an embodiment of the present application;

[0078] Figure 2 This is a schematic flow chart of a communication method provided in an embodiment of the present application;

[0079] Figure 3 This is a schematic diagram of a communication method provided by an embodiment of the present application;

[0080] Figure 4 is another schematic diagram of the communication method provided in an embodiment of the present application;

[0081] Figure 5 is a schematic block diagram of a communication device provided in an embodiment of the present application;

[0082] Figure 6 This is another schematic block diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0083] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0084] The terms "first", "second", etc. in the specification, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0085] The technical solution in this application will be described below with reference to the accompanying drawings.

[0086] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0087] Figure 1 It is a schematic diagram of the architecture of the communication system 100 applicable to the embodiment of the present application.

[0088] like Figure 1 As shown, the communication system 100 may include at least one network device, such as Figure 1 The communication system 100 may also include at least one terminal device, such as Figure 1 The terminal device 120 shown. The network device 110 and the terminal device 120 can communicate using beamforming technology. The network device 110 and the terminal device 120 determine the beam for receiving or transmitting a signal or channel using the method provided in this application. Optionally, the network device 110 may include multiple transmission resources, which may be multiple antenna panels or multiple transmit-receive points (TRPs), and the network device can communicate with the terminal device through the multiple transmission resources.

[0089] The terminal device involved in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present application.

[0090] The network device involved in the embodiments of the present application may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be named otherwise. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (eNB or e-NodeB) in the Long Term Evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., and is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0091] The following is an explanation of the relevant technologies and terms involved in this application.

[0092] 1. Quasi-co-location (QCL)

[0093] QCL can also be called quasi-colocation. The signals corresponding to the antenna ports with a QCL relationship have the same parameters, or the parameters of one antenna port can be used to determine the parameters of another antenna port with a QCL relationship with the antenna port, or the two antenna ports have the same parameters, or the parameter difference between the two antenna ports is less than a certain threshold. The parameters may include one or more of the following: delay spread, Doppler spread, Doppler shift, average delay, average gain, and spatial Rx parameters. The spatial Rx parameters may include one or more of the following: angle of arrival (AOA), average AOA, AOA spread, angle of departure (AOD), average departure angle AOD, AOD spread, receiving antenna spatial correlation parameter, transmitting antenna spatial correlation parameter, transmit beam, receiving beam, and resource identifier.

[0094] The above-mentioned angles can be decomposition values ​​of different dimensions, or a combination of decomposition values ​​of different dimensions. The antenna port is an antenna port with different antenna port numbers, and / or an antenna port with the same antenna port number that sends or receives information at different times and / or frequencies and / or code domain resources, and / or an antenna port with different antenna port numbers that sends or receives information at different times and / or frequencies and / or code domain resources. The resource identifier may include: a CSI-RS resource identifier, or an SRS resource identifier, or an SSB resource identifier, or a resource identifier of a preamble sequence transmitted on a physical random access channel (PRACH), or a resource identifier of a DMRS, used to indicate a beam on a resource.

[0095] In the NR protocol, QCL relationships can be divided into the following four types based on different parameters:

[0096] Type A: Doppler shift, Doppler spread, average delay, delay spread;

[0097] Type B: Doppler shift, Doppler spread;

[0098] Type C: Doppler shift, average delay; and

[0099] Type D: space receiving parameters.

[0100] 2. Transmission Configuration Indicator (TCI) Status

[0101] The TCI state can be used to indicate the QCL relationship between two reference signals, or between a beam and a reference signal, or between a beam and the beams corresponding to the reference signals. Each TCI state may include an identifier of a reference signal, where the identifier of the reference signal can be at least one of the following: an identifier of a non-zero power (NZP) channel state information reference signal (CSI-RS), an identifier of an NZP CSI-RS set, or an identifier of a synchronization signal and physical broadcast CHannel (PBCH) block (SynchronizationSignal and PBCH Block, SSB).

[0102] During the communication process, the terminal device can determine the beam used to receive and / or send signals or channels based on the TCI state indicated by the network device. Specifically, the terminal device can determine that the beam used to receive and / or send signals or channels is a beam having a QCL relationship with the beam corresponding to the reference signal indicated by the TCI state.

[0103] The data transmission method provided by this application is described below with reference to the accompanying drawings.

[0104] Figure 2 This is a schematic flowchart of the communication method provided in the embodiment of the present application.

[0105] S201, the terminal device receives one or more first DCIs, where the one or more first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states.

[0106] The network device may send a first DCI notification to the terminal device to notify the effective TCI status.

[0107] In one embodiment, a network device may send a first DCI to a terminal device, wherein a third indication field in the first DCI indicates N TCI states. That is, the effective TCI states are these N TCI states. During the validity period of these N TCI states, the terminal device may receive and transmit signals and / or channels according to these N TCI states.

[0108] In another embodiment, the network device may send multiple first DCIs to the terminal device, each of the multiple first DCIs includes a third indication field, and the third indication field in each first DCI indicates at least one TCI state. The multiple first DCIs indicate a total of N TCI states.

[0109] As an example and not a limitation, the multiple first DCIs may be first DCIs carried in the same time unit, or may be first DCIs carried in different time units.

[0110] For example, the network device sends a first DCI 1 indicating TCI state 1 in time unit n, and sends a first DCI 2 indicating TCI state 2 in time unit n+1. After the indication of the first DCI 2 takes effect, the effective TCI states include TCI state 1 and TCI state 2, two TCI states (i.e., N=2). Alternatively, the network device sends a first DCI 1 indicating TCI state 1 in time unit n, and sends a first DCI 2 indicating TCI state 2 and TCI state 3 in time unit n+2. After the indication of the first DCI 2 takes effect, the effective TCI states include TCI state 1, TCI state 2, and TCI state 3, three TCI states (i.e., N=3).

[0111] Specifically, the N TCI states being effective TCI states can be understood as meaning that the beam indicated by each TCI state in the N TCI states is an effective beam, and the terminal device can use the effective beam to receive and transmit signals and / or channels during the validity period of the effective beam. The beam indicated by the TCI state can be the beam corresponding to the reference signal indicated by the TCI state.

[0112] Where N is a positive integer. N may be equal to 1. For example, if the third indication field indicates one TCI state, such as TCI state 1, then TCI state 1 is the effective TCI state. Alternatively, the third indication field may indicate multiple TCI states. For example, if the third indication field indicates TCI state 1 and TCI state 2, then TCI state 1 and TCI state 2 are the effective TCI states. However, the present application is not limited to this.

[0113] In one embodiment, the third indication field includes K bit fields, each of the K bit fields is used to indicate a TCI state, where K is greater than or equal to N and is a positive integer.

[0114] For example, each TCI state corresponds one-to-one with a code point, and each bit field indicates a code point corresponding to the TCI. For example, if there are eight TCI states, each bit field includes three bits, and each TCI state corresponds to a three-bit code point. For example, 000 corresponds to TCI state 0, 001 corresponds to TCI state 1, ..., 111 corresponds to TCI state 7. The third indicator field includes two bit fields, each of which includes three bits. The two bit fields indicate 001 and 002, respectively, indicating that TCI state 1 corresponding to 001 and TCI state 2 corresponding to 002 are the currently effective TCI states.

[0115] For another example, the third indication field includes K bit fields, wherein, when an indication field indicates a default value, it indicates that the indication field does not indicate a TCI state. In one example, the third indication field includes two 3-bit bit fields (i.e., K=2), wherein one bit field indicates 011, indicating that TCI state 3 is an effective TCI state, and the other bit field indicates a default value 000, indicating that the indication field does not indicate a TCI state. Therefore, the terminal device can determine, based on the third indication field, that the third indication field indicates a TCI state, and the TCI state is TCI state 3, and the TCI state 3 is an effective TCI state. However, the present application is not limited to this.

[0116] Optionally, before S201, the network device may configure multiple TCI states for the terminal device through high-layer signaling (such as a Radio Resource Control (RRC) message). For example, a maximum of 128 TCI states may be configured. Thereafter, the network device may activate one or more of the multiple TCI states configured in the RRC message through Media Access Control (MAC) Control Element (CE) signaling. For example, the network device may activate up to 8 TCI states through MAC CE signaling.

[0117] Among them, each of the one or more TCI states activated by the MAC CE signaling corresponds to a code point, and a bit field in the third indication field indicates a code point corresponding to a TCI state. However, the present application is not limited thereto.

[0118] In another implementation, the third indication field indicates a code point, and the code point corresponds to one or more TCI states.

[0119] For example, the third indication field indicates a code point in the first mapping relationship. The first mapping relationship includes multiple code points, each of which corresponds to one or more TCI states. In one example, the first mapping relationship includes 8 3-bit code points, wherein code point 000 corresponds to TCI state 0, code point 001 corresponds to TCI state 0 and TCI state 1, code point 010 corresponds to TCI state 0 and TCI state 2, etc. The terminal device can determine the number N of TCI states indicated by the third indication field based on the number of TCI states corresponding to the code points indicated by the third indication field. For example, if the third indication field indicates 010, the terminal device can determine that the two TCI states corresponding to the third indication field indication 010 are TCI state 0 and TCI state 2, and TCI state 0 and TCI state 2 are effective TCI states. However, the present application is not limited to this. Optionally, the first mapping relationship can be configured for the terminal device by the network device before S201 (for example, through RRC message or MAC CE signaling, etc.).

[0120] Optionally, the first DCI is a dedicated DCI for indicating the effective TCI state. Alternatively, the first DCI is used to schedule the second data channel. In other words, the first DCI is used to indicate scheduling information of the second data channel.

[0121] For example, the first DCI is a DCI in a first format, and the DCI in the first format is used to indicate the effective TCI state. The DCI in the first format includes at least a third indication field. However, the present application is not limited thereto.

[0122] For another example, the first DCI is a DCI for scheduling a data channel. For example, the first DCI is a DCI for scheduling a PDSCH or a DCI for scheduling a PUSCH. In addition to the scheduling information of the data channel, the first DCI also includes the third indication field, and the effective TCI state is indicated by the third indication field. However, the present application is not limited to this.

[0123] Optionally, the N TCI states correspond to N transmission resources.

[0124] The network device can communicate with the terminal device through multiple transmission resources. The multiple transmission resources of the network device can be multiple antenna panels, multiple TRPs, etc., but the present application is not limited to this.

[0125] Among them, the correspondence between the N TCI states and the N transmission resources can be a default, for example, the network device can indicate N effective TCI states through a first DCI, and the third indication field in the first DCI includes K bit fields, then each bit field in the K bit fields corresponds to a transmission resource, for example, the transmission resource is the TRP of the network device, the bit field 0 corresponds to TRP0, the bit field 1 corresponds to TRP1, the bit field K corresponds to TRP K, etc., and one bit field is used to indicate the effective TCI state of the TRP corresponding to the bit field. However, the present application is not limited to this. Alternatively, the third indication field indicates a code point in the first mapping relationship, the first TCI state corresponding to the code point is the TCI state corresponding to TRP0, and the second TCI state is the TCI state corresponding to TRP1, but the present application is not limited to this.

[0126] Optionally, the one or more first DCIs correspond to multiple transmission resources. Each first DCI includes an identifier of the transmission resource, a TCI state indicated by a third indication field, and an effective TCI state of the transmission resource corresponding to the identifier.

[0127] For example, the transmission resource is TRP, and the network device sends a first DCI 1 to the terminal device in time slot n, wherein the first DCI 1 includes an identifier of TRP 1, and the third indication field in the first DCI 1 indicates TCI state 2, then the terminal device can determine that the effective TCI state of the TRP 1 is TCI state 2. The network device sends a first DCI 2 to the terminal device in time slot n+1, wherein the first DCI 2 includes an identifier of TRP 3, and the third indication field in the first DCI 2 indicates TCI state 0, then the terminal device can determine that the effective TCI state of the TRP 3 is TCI state 0. However, the present application is not limited to this.

[0128] S202, within the validity period of the N TCI states, the terminal device receives a second DCI, where the second DCI is used to indicate scheduling information of the first data channel.

[0129] In other words, the second DCI is used to schedule the first data channel. The terminal device can determine the resources carrying the PDSCH and the coding information of the PDSCH according to the scheduling information included in the second DCI. This application does not limit this.

[0130] In one implementation, the network device sends the second DCI according to at least one TCI state among the N valid TCI states, and the terminal device receives the second DCI according to the N TCI states.

[0131] For example, the network device sends a physical downlink control channel (PDCCH) for carrying the second DCI according to TCI state 2 among the N states. Specifically, the network device can send a PDCCH for carrying the second DCI according to the transmission beam corresponding to the reference signal indicated by the TCI state 2, or a beam having a QCL type D relationship with the beam. The terminal device receives the second DCI according to the effective TCI state, that is, the N TCI states. Specifically, the terminal device receives the PDCCH according to the beam corresponding to the reference signal indicated by each TCI state in the N TCI states, or a beam having a QCL type D relationship with the beam corresponding to the reference signal indicated by each TCI state. The second DCI can be obtained by blind detection of the PDCCH. However, the present application is not limited to this.

[0132] In another embodiment, the network device sends the second DCI according to a first TCI state, and the terminal device receives the second DCI from the network device according to the first TCI state, wherein the first TCI state is one of the N valid TCI states.

[0133] Optionally, the first TCI state is predefined by the protocol or preconfigured by the network.

[0134] The first TCI state may be the first TCI state among the N TCI states, for example, bit field 0 to bit field K in the first DCI, and the first TCI state is the TCI state indicated by the smallest numbered bit field (for example, bit field 0) or the largest numbered bit field (for example, bit field K) in the bit field indicating the TCI state. Alternatively, the first TCI state may be the TCI state corresponding to the minimum code point or the maximum code point indicated by the first DCI. Alternatively, the N TCI states correspond to N TRPs, and the first TCI state is the TCI state corresponding to the TRP with the smallest identifier among the N TRPs. However, the application is not limited thereto. According to this solution, the terminal device and the network device reach a consensus through protocol pre-definition or network pre-configuration, and adopt the specified first TCI state for sending and receiving, which can reduce the power consumption of the terminal device.

[0135] The first data channel may be a PUSCH, and the second DCI is a DCI for scheduling a PUSCH, i.e., an uplink grant (UL grant) DCI. The first data channel may be a PDSCH, and the second DCI is a DCI for scheduling a PDSCH, i.e., a downlink scheduling DCI. That is to say, during the effective period of the N TCI states, the network device sends a DCI for scheduling a data channel to the terminal device according to the effective TCI state, and the terminal device receives a DCI for scheduling a data channel from the network device according to the effective TCI state. Optionally, the network device and the terminal device respectively send and receive DCI for other purposes (for example, a slot format indicator (SFI) DCI, etc.) according to the effective TCI state.

[0136] S203: The terminal device sends or receives a first data channel according to at least one TCI state among the N TCI states.

[0137] When the first data channel is a PUSCH, the terminal device sends the PUSCH according to at least one TCI state among the N TCI states. When the first data channel is a PDSCH, the terminal device receives the PDSCH according to at least one TCI state among the N TCI states.

[0138] In one embodiment, the terminal device can send or receive the first data channel according to the N TCI states.

[0139] For example, the first data channel is a PDSCH, and the terminal device uses the beams indicated by the N TCI states to receive the PDSCH. However, the present application is not limited thereto.

[0140] In another embodiment, the second DCI includes a first indication field, and the first indication field is used to indicate at least one TCI state among N TCI states, and the terminal device sends or receives the first data channel according to the at least one TCI state.

[0141] In one example, if Figure 3As shown, the network device indicates TCI state 1 and TCI state 2 through the first DCI in time slot n, and the two TCI states are valid TCI states. During the validity period of TCI state 1 and TCI state 2, the network device sends a PDCCH carrying the second DCI in time slot n+3 according to at least one TCI state of the two valid TCI states. The terminal device receives the PDCCH in time slot n+3 according to the two TCI states, and detects the second DCI in the PDCCH. The second DCI is used to schedule PUSCH. The scheduling authorization information in the second DCI indicates that the resource carrying PUSCH is resource m in time slot n+4. The first indication field in the second DCI indicates TCI state 1, and the terminal device sends PUSCH on resource m according to the TCI state 1. Accordingly, the network device receives PUSCH from the terminal device on resource m according to the TCI state 1, but the present application is not limited to this.

[0142] Optionally, the first indication field includes at least one bit, where the at least one bit indicates a first value, and the first value corresponds to at least one TCI state among the N valid TCI states.

[0143] For example, the first DCI state indicates TCI state 1 and TCI state 2, and the two TCI states are valid TCI states. The first indication field in the second DCI includes 2 bits, and the 2 bits can indicate 4 values, 00, 01, 10, and 11. For example, as shown in Table 1, 00 corresponds to TCI state 1 and TCI state 2, 01 corresponds to TCI state 1, 10 corresponds to TCI state 2, and 11 can be a reserved value. The first value can be a value among 00, 01, and 10. For example, the first indication field indicates 00, that is, the first value is 00. After the terminal device receives the second DCI, the terminal device can determine to receive or send the first data channel according to TCI state 1 or TCI state 2 based on the first indication field indicating 00, but the application is not limited to this.

[0144] Table 1

[0145] First indicator field TCI status 00 TCI state 1, TCI state 2 01 TCI Status 1 10 TCI Status 2 11 reserve

[0146] In another example, the N valid TCI states correspond one-to-one to N transmission resources. For example, the transmission resource is the TRP of the network device. The network device indicates TCI state 1 and TCI state 2 through the first DCI. The two TCI states are valid TCI states, where TCI state 1 corresponds to TRP1 and TCI state 2 corresponds to TRP2. During the period when the two TCI states are valid, the network device sends a PDCCH carrying the second DCI according to TCI state 1 through TRP1. The terminal device can receive the PDCCH according to TCI state 1 and TCI state 2, and blindly detect the PDCCH to obtain the second DCI. The second DCI is used to schedule PDSCH, and the first indication field in the second DCI is used to indicate TCI state 1. The terminal device can determine that the PDSCH is from TRP1 based on TCI state 1, and the terminal device receives the PDSCH from TRP1 based on the TCI state 1.

[0147] Optionally, the terminal device can determine the number of the first data channel based on the number of TCI states included in the at least one TCI state indicated by the first indication field.

[0148] For example, if the first indication field in the second DCI indicates a TCI state, the terminal device can determine that the PDSCH scheduled by the second DCI comes from the TRP corresponding to the TCI state, or that the PUSCH scheduled by the second DCI is sent to the TRP corresponding to the TCI state. Alternatively, if the first indication field indicates L TCI states among N valid TCI states, the terminal device can determine that the number of first data channels is L. When the first data channel is PDSCH, the terminal device can determine that the resource m indicated by the scheduling information of the second DCI carries L PDSCHs, which come from the L TRPs corresponding to the L TCI states respectively. The terminal device receives the L PDSCHs from the L TRPs according to the L TCI states. When the first data channel is PUSCH, the terminal device can determine that according to the scheduling information of the second DCI, L PUSCHs are sent to the L TRPs corresponding to the L TCI states according to the L TCI states on resource m, and the network device receives L PUSCHs from the terminal device through the L TRPs. Specifically, the network device may receive a PUSCH sent from the terminal device according to the TCI state corresponding to each TRP from the corresponding TRP, but the present application is not limited thereto.

[0149] Optionally, the second DCI further includes a second indication field, where the second indication field indicates M TCI states, and the effective TCI state is changed from N TCI states to M TCI states.

[0150] That is, in this optional manner, the DCI used to schedule the data channel is also used to indicate the effective TCI status.

[0151] For example Figure 4 As shown, the network device sends a first DCI in time slot n, and the first DCI is used to schedule the second data channel in time slot n, and the third indication field in the first DCI indicates that the effective TCI state is TCI state 0. During the validity period of TCI state 0, the terminal device and the network device send or receive signals and / or channels according to TCI state 0. For example, the terminal device receives the second DCI sent by the network device according to TCI state 0 in time slot n+3 according to TCI state 0, and receives or sends the first data channel in time slot n+4 scheduled by the second DCI according to DCI state 0. Wherein, the second DCI includes a second indication field, and the second indication field is used to indicate TCI state 1 and TCI state 2, then the effective TCI state is changed from TCI state 0 to TCI state 1 and TCI state 2. Then, during the validity period of TCI state 1 and TCI state 2, the terminal device and the network device receive and send channels and / or signals according to the two effective TCI states. Optionally, the effective TCI state indicated by the DCI may be effective in the next time slot of the time slot where the data channel scheduled by the DCI is located (for example, Figure 4 As shown), or the effective TCI state may take effect after a preset time interval after the DCI or the data channel scheduled by the DCI, but the present application is not limited thereto.

[0152] The above solution improves the flexibility of beam indication, enabling a terminal device to determine candidate receive or transmit beams for receiving or transmitting data channels before data channel scheduling. This improves scheduling flexibility for low-capability terminal devices when using the beam transmission mechanism. Furthermore, flexible indication of beam reception or transmission for multiple TRPs is possible.

[0153] This solution can also be implemented in scenarios where the channels between the network device and the terminal device are mutually different. The network device can indicate the effective TCI state through the first DCI, so that the terminal device can determine to send or receive subsequent signals and / or channels according to the effective TCI state within the validity period of the effective TCI state, avoiding the network device indicating the reference TCI state of the transmit beam and the reference TCI state of the receive beam for each channel and / or signal one by one, which can reduce signaling overhead and implementation complexity. Figures 2 to 4 The method provided by the embodiment of the present application is described in detail. The device provided by the embodiment of the present application is described below.

[0154] Figure 55 is a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device may correspond to the terminal device in the above method embodiment, and the communication device is configured in the terminal device. The communication device includes a transceiver 510, a processor 520, and a memory 530.

[0155] The transceiver 510 is configured to receive and send data under the control of the processor 520 .

[0156] Among them, Figure 5 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 520 and memory represented by memory 530. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 510 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The communication device may also include a user interface 540. For different user devices, the user interface 540 may also be an interface capable of connecting external or internal devices as required. The connected devices include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0157] The processor 520 is responsible for managing the bus architecture and general processing, and the memory 530 can store data used by the processor 520 when performing operations.

[0158] Optionally, the processor 520 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0159] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0160] Figure 66 is another schematic block diagram of a communication device provided in an embodiment of the present application. The communication device may correspond to the network device in the above method embodiment, and the communication device is configured in the network device. The communication device includes a transceiver 610, a processor 620, and a memory 630.

[0161] The transceiver 610 is configured to receive and send data under the control of the processor 620 .

[0162] Among them, Figure 6 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 620 and memory represented by memory 630. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 610 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 620 is responsible for managing the bus architecture and general processing, and the memory 630 may store data used by the processor 620 when performing operations.

[0163] The processor 620 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0164] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0165] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0166] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0167] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0168] An embodiment of the present application also provides a processor-readable storage medium, which stores a computer program. The computer program is used to enable the processor to implement all the method steps implemented in the above-mentioned method embodiment and to achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0169] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0170] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: computer program code (or instructions). When the computer program code is executed by one or more processors, the device including the processor can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0171] According to the method provided in the embodiment of the present application, the present application also provides a communication system, which includes one or more network devices as described above. The system may further include one or more terminal devices as described above.

[0172] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) that contain computer-usable program code.

[0173] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0174] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0175] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0176] In the embodiments of the present application, under the premise that there is no logical contradiction, the embodiments may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device embodiments and method embodiments may reference each other.

[0177] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: The terminal device receives multiple first downlink control information DCIs, where the multiple first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; During the validity period of the N TCI states, the terminal device receives a second DCI according to the N TCI states, or the terminal device receives the second DCI according to a first TCI state, where the first TCI state is one of the N TCI states, and the first TCI state is predefined by a protocol or preconfigured by a network; the second DCI is used to indicate scheduling information of a first data channel; the second DCI includes a second indication field, and the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N, and M is a positive integer; The terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states.

2. The method according to claim 1, characterized in that The second DCI includes a first indication field, where the first indication field is used to indicate the at least one TCI state.

3. The method according to claim 2, characterized in that The first indication field includes at least one bit, and the at least one bit indicates a first value, where the first value corresponds to the at least one TCI state.

4. The method according to any one of claims 1 to 3, characterized in that The N TCI states correspond to N transmission resources, the second DCI comes from at least one transmission resource among the N transmission resources, and the first data channel comes from at least one transmission resource among the N transmission resources.

5. The method according to any one of claims 1 to 3, characterized in that The method further comprises: The terminal device determines the number of the first data channels based on the number of TCI states included in the at least one TCI state.

6. The method according to any one of claims 1 to 3, characterized in that At least one first DCI included in the multiple first DCIs is a dedicated DCI used to indicate the valid TCI state, or at least one first DCI included in the multiple first DCIs is also used to indicate scheduling information of the second data channel.

7. The method according to any one of claims 1 to 3, characterized in that The first data channel is a physical downlink shared channel PDSCH, and the terminal device sends or receives the first data channel according to at least one TCI state of the N TCI states, including: The terminal device receives the PDSCH according to the at least one TCI state, or, The first data channel is a physical uplink shared channel PUSCH, and the terminal device sends or receives the first data channel according to at least one TCI state among the N TCI states, including: The terminal device sends the PUSCH according to the at least one TCI state.

8. The method according to any one of claims 1 to 3, characterized in that The terminal device sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: The terminal device sends the first data channel according to the transmit beam or the corresponding transmit spatial filter corresponding to the reference signal indicated by the at least one TCI state, and / or The terminal device receives the first data channel according to the receiving beam or the corresponding receiving spatial filter corresponding to the reference signal indicated by the at least one TCI state.

9. A communication method, characterized in that: include: Sending multiple first downlink control information (DCIs) to a terminal device, where the multiple first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; During the validity period of the N TCI states, a second DCI is sent according to the N TCI states, or the second DCI is sent according to a first TCI state among the N TCI states, where the first TCI state is predefined by the protocol or preconfigured by the network; the second DCI is used to indicate scheduling information of the first data channel; the second DCI includes a second indication field, where the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N and is a positive integer; The first data channel is sent or received according to at least one TCI state among the N TCI states.

10. The method according to claim 9, characterized in that The second DCI includes a first indication field, where the first indication field is used to indicate the at least one TCI state.

11. The method according to claim 10, characterized in that The first indication field includes at least one bit, and the at least one bit indicates a first value, where the first value corresponds to the at least one TCI state.

12. The method according to any one of claims 9 to 11, characterized in that The N TCI states correspond to N transmitting and receiving points TRP, the second DCI is sent by at least one TRP among the N TRPs, and the first data channel is sent by at least one TRP among the N TRPs.

13. The method according to any one of claims 10 to 11, characterized in that At least one first DCI included in the multiple first DCIs is a dedicated DCI for indicating a valid TCI state, or at least one first DCI included in the multiple first DCIs is used to indicate scheduling information of a second data channel.

14. The method according to any one of claims 9 to 11, characterized in that The first data channel is a physical downlink shared channel PDSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: sending the PDSCH according to the at least one TCI state, or, The first data channel is a physical uplink shared channel PUSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: The PUSCH is received according to the at least one TCI state.

15. The method according to any one of claims 9 to 11, characterized in that The sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: transmitting the first data channel according to the transmit beam corresponding to the reference signal of the at least one TCI state indication, and / or Receive the first data channel according to the receiving beam corresponding to the reference signal indicated by the at least one TCI state.

16. A communication device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: receiving a plurality of first downlink control information (DCIs), where the plurality of first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; During the validity period of the N TCI states, a second DCI is received according to the N TCI states, or the second DCI is received according to a first TCI state, where the first TCI state is one of the N TCI states, and the first TCI state is predefined by a protocol or preconfigured by a network; the second DCI is used to indicate scheduling information of a first data channel; the second DCI includes a second indication field, and the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N and is a positive integer; The first data channel is sent or received according to at least one TCI state among the N TCI states.

17. The device according to claim 16, characterized in that The second DCI includes a first indication field, where the first indication field is used to indicate the at least one TCI state.

18. The device according to claim 17, characterized in that The first indication field includes at least one bit, and the at least one bit indicates a first value, where the first value corresponds to the at least one TCI state.

19. The device according to any one of claims 16 to 18, characterized in that The N TCI states correspond to N transmission resources, the second DCI comes from at least one transmission resource among the N transmission resources, and the first data channel comes from at least one transmission resource among the N transmission resources.

20. The device according to any one of claims 16 to 18, characterized in that include: The number of the first data channels is determined according to the number of TCI states included in the at least one TCI state.

21. The device according to any one of claims 16 to 18, characterized in that At least one first DCI among the multiple first DCIs is a dedicated DCI for indicating a valid TCI state, or at least one first DCI among the multiple first DCIs is used to indicate scheduling information of a second data channel.

22. The device according to any one of claims 16 to 18, characterized in that The first data channel is a physical downlink shared channel PDSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: receiving the PDSCH according to the at least one TCI state, or, The first data channel is a physical uplink shared channel PUSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: The PUSCH is sent according to the at least one TCI state.

23. The device according to any one of claims 16 to 18, characterized in that The sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: transmitting the first data channel according to a transmit beam or a corresponding transmit spatial filter corresponding to a reference signal indicating the at least one TCI state, and / or The first data channel is received according to a receive beam or a corresponding receive spatial filter corresponding to a reference signal indicated by the at least one TCI state.

24. A communication device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Sending multiple first downlink control information (DCIs) to a terminal device, where the multiple first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; During the validity period of the N TCI states, a second DCI is sent according to the N TCI states, or the second DCI is sent according to a first TCI state among the N TCI states, where the first TCI state is predefined by the protocol or preconfigured by the network; the second DCI is used to indicate scheduling information of the first data channel; the second DCI includes a second indication field, where the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N and is a positive integer; The first data channel is sent or received according to at least one TCI state among the N TCI states.

25. The device according to claim 24, characterized in that The second DCI includes a first indication field, where the first indication field is used to indicate the at least one TCI state.

26. The device according to claim 25, characterized in that The first indication field includes at least one bit, and the at least one bit indicates a first value, where the first value corresponds to the at least one TCI state.

27. The device according to any one of claims 24 to 26, characterized in that The N TCI states correspond to N transmitting and receiving points TRP, the second DCI is sent by at least one TRP among the N TRPs, and the first data channel is sent by at least one TRP among the N TRPs.

28. The device according to any one of claims 24 to 26, characterized in that The first DCI is a dedicated DCI used to indicate the effective TCI state, or the first DCI is used to indicate scheduling information of the second data channel.

29. The device according to any one of claims 24 to 26, characterized in that The first data channel is a physical downlink shared channel PDSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: sending the PDSCH according to the at least one TCI state, or, The first data channel is a physical uplink shared channel PUSCH, and the sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: The PUSCH is received according to the at least one TCI state.

30. The device according to any one of claims 24 to 26, characterized in that The sending or receiving the first data channel according to at least one TCI state among the N TCI states includes: transmitting the first data channel according to the transmit beam corresponding to the reference signal of the at least one TCI state indication, and / or Receive the first data channel according to the receiving beam corresponding to the reference signal indicated by the at least one TCI state.

31. A communication device, characterized in that: include: A transceiver unit, configured to receive multiple first downlink control information (DCIs), where the multiple first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; The transceiver unit is further configured to receive, within a validity period of the N TCI states, a second DCI according to the N TCI states, or receive the second DCI according to a first TCI state, where the first TCI state is one of the N TCI states, and the first TCI state is predefined by a protocol or preconfigured by a network; the second DCI is used to indicate scheduling information of a first data channel; the second DCI includes a second indication field, the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N and is a positive integer; a processing unit, configured to determine at least one TCI state among the N TCI states; The transceiver unit is further configured to send or receive the first data channel according to the at least one TCI state.

32. A communication device, characterized in that: include: A transceiver unit, configured to send multiple first downlink control information (DCI) to a terminal device, where the multiple first DCIs are used to indicate N TCI states, where the N TCI states are valid TCI states, and N is a positive integer; wherein the first DCI includes a third indication field, and each bit field in the third indication field corresponds to a transmission resource; The transceiver unit is further configured to send a second DCI according to the N TCI states within a validity period of the N TCI states, or send the second DCI according to a first TCI state among the N TCI states, where the first TCI state is predefined by a protocol or preconfigured by a network; the second DCI is used to indicate scheduling information of a first data channel; the second DCI includes a second indication field, the second indication field is used to indicate M TCI states, and the effective TCI state is changed from the N TCI states to the M TCI states, where M is less than or equal to N and is a positive integer; a processing unit, configured to determine at least one TCI state among the N TCI states; The transceiver unit is further configured to send or receive the first data channel according to the at least one TCI state.

33. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is configured to cause the processor to execute the method according to any one of claims 1 to 15.

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