WO2020164601A1

WO2020164601A1 - Transmission configuration index state indication method, and communication apparatus

Info

Publication number: WO2020164601A1
Application number: PCT/CN2020/075318
Authority: WO
Inventors: 樊波; 管鹏
Original assignee: 华为技术有限公司
Priority date: 2019-02-15
Filing date: 2020-02-14
Publication date: 2020-08-20
Also published as: CN111586846B; CN111586846A

Abstract

The present application provides a transmission configuration indicator (TCI) state indication method. The method comprises: receiving configuration information sent by a network device, the configuration information comprising a configuration of one or more TCI-state combinations; each TCI-state combination comprising one or more TCI-states; receiving a media access control-control unit (MAC-CE) sent by the network device, the MAC-CE being used for activating some or all of the TCI-state combinations; and receiving downlink control information (DCI) sent by the network device, and determining, according to the value of a TCI field in the DCI, one activated TCI-state combination, and one or more TCI-states comprised therein. According to the method, the network device can indicate a plurality of TCI-states to a terminal device so as to achieve multi-beam/multi-TRP transmission.

Description

Method and communication device for transmitting configuration number status indication

Technical field

This application relates to the field of wireless communication, and more specifically, to a method and communication device for transmitting configuration number status indication.

Background technique

In order to meet the large-capacity and high-rate transmission requirements of mobile communication systems, the 5th generation (5G) mobile communication system (5th generation, 5G) introduces high-frequency frequency bands greater than 6GHz for communication to take advantage of its large bandwidth and high-rate transmission characteristics; One of the main problems of high-frequency communication is that the signal energy drops sharply with the transmission distance, resulting in a short signal transmission distance. In order to overcome this problem, high-frequency communication adopts analog beam technology, and performs weighting processing through a large-scale antenna array to concentrate the signal energy in a small range to form a beam-like signal (called analog beam, or beam for short). ) To increase the transmission distance.

Network equipment can generate different beams, pointing to different transmission directions. In downlink data transmission, when a network device uses a specific beam to send data to a terminal device, it needs to inform the terminal device of the information about the transmission beam used by the network device, so that the terminal device can use the receiving beam corresponding to the transmission beam. Receive data sent by network equipment. In the 3GPP R15 protocol, the network device uses the TCI (Transmission Configuration Index, transmission configuration index) field in the Downlink Control Information (DCI) to indicate to the terminal device related information about the transmission beam used by the network device. Specifically, based on the value of the TCI field, the terminal device can determine the TCI state (TCI-state) used for data transmission. According to the TCI-state, the terminal device can determine the receiving beam information corresponding to the sending beam used for data transmission, so as to use the corresponding receiving beam to receive the data issued by the network device.

In addition, in some scenarios of low frequency communication, TCI-state also needs to be indicated. For example, multiple transmission and reception points (TRP) are used to sequentially send data for the same terminal device. Different TRPs use different TCI-states to transmit data. The TCI-state terminal device can determine the TRP that sends the data.

Currently, the 3GPP R15 protocol supports a single TCI-state indication, and can support single beam transmission or single TRP transmission. When multi-beam transmission or multi-TRP transmission is used, the network device needs to indicate multiple TCI-states to the terminal device. The current TCI-state indication method of the 3GPP R15 protocol cannot be supported.

Summary of the invention

This application provides a TCI-state indication method and communication device, so that a network device can indicate multiple TCI-states to a terminal device, thereby realizing multi-beam/multi-TRP transmission.

For example, the TCI-state indication method includes: the network device sends configuration information to the terminal device, the configuration information includes the configuration of one or more transmission configuration indication state TCI-state combinations, and each TCI-state combination includes one or more A TCI-state; the network device sends an activation command to the terminal device to activate part or all of the TCI-state combination; the network device sends a transmission configuration instruction TCI to the terminal device; accordingly, the terminal device determines the corresponding value according to the received TCI The activated TCI combination, and can further determine each TCI-state in the activated TCI combination; further can determine the code division multiplexing CDM group corresponding to each demodulation reference signal DMRS port, DMRS port group or DMRS port TCI-state.

In the above solution, the configuration information can be issued through radio resource control (RRC) messages, the activation command can be MAC-CE (Medium Access Control-Control Element, media access control-control element), and TCI can be through DCI Issued.

For example: from the perspective of a terminal device, the indication method of the transmission configuration indication state includes:

Receive configuration information sent by a network device, where the configuration information includes one or more transmission configuration indication state TCI-state combinations, and each TCI-state combination includes one or more TCI-states; receive media access control sent by the network device The control unit MAC-CE, the MAC-CE is used to activate part or all of the TCI-state combination; receives the downlink control information DCI sent by the network device, and determines an activated TCI-state according to the value of the TCI field of the transmission configuration indication in the DCI Combination; one or more TCI-states included in the one activated TCI-state combination.

In another example, multiple activated TCI-state combinations can also be determined according to the value of the TCI field.

The above scheme includes the steps of configuration, activation and instruction. In actual applications, it may be configured once, and there may be multiple activations and instructions in a subsequent period of time, or it may be activated once, and there may be multiple instructions in a subsequent period of time; in addition, it may not be Steps that require configuration only require activation and instructions; or steps that do not require activation, only configuration and instructions are required; therefore, there are many situations in actual applications.

In combination with the above solution, each TCI-state combination includes an index of the TCI-state combination and an index of one or more TCI-states included in the TCI-state combination; that is, each TCI-state The combination has its own index, and each TCI-state in the TCI-state combination also has its own index.

In combination with the above solution, one bit in MAC-CE (for example: the first bit) is used to indicate that the object of MAC-CE activation is a TCI-state combination; the MAC-CE may be a MAC-CE as an activation command , It can also be a separate MAC-CE; or a field in the configuration information or the received RRC message is used to indicate that the object of MAC-CE activation is a TCI-state combination; the RRC message can be an RRC carrying configuration information The message can also be a separate RRC message.

That is to say, there is a field or bit in MAC-CE or RRC to indicate whether the corresponding activation is TCI-state or TCI-state combination. After receiving the MAC-CE or RRC, the terminal device can use the above field or bit To confirm whether the received MAC-CE is used to activate the TCI-state combination; RRC can be the RRC carrying configuration information, or it can be a separate RRC, and the MAC-CE can be the MAC-CE used to activate the TCI-state combination , It can also be a separate MAC-CE; the above indication method is display.

In combination with the above solution, at least one of the following is used to determine that the MAC-CE activated object is the TCI-state combination:

If the terminal device is configured with a TCI-state combination, it is determined that the MAC-CE activated object is a TCI-state combination; in the measurement configuration information received by the terminal device, if the value of the parameter beam group report groupBasedBeamReporting is enable, it is determined that the MAC-CE activated object is a TCI-state combination; or if the terminal device receives multi-beam transmission or multi-TRP transmission indication information, it is determined that the MAC-CE activated object is TCI-state combination.

If one or more of the above conditions can be satisfied, it is considered that the MAC-CE activated object is a TCI-state combination, each condition can be combined arbitrarily, and the above indication mode is implicit.

In combination with the above solution, when it is determined that the MAC-CE activated object is a TCI-state combination, the index of one or more activated TCI-state combinations is determined according to the MAC-CE.

Combining the above solution, it further includes: determining the code division multiplexing CDM group correspondence of each demodulation reference signal DMRS port, DMRS port group or DMRS port according to one or more TCI-states included in the one activated TCI-state combination The TCI-state can specifically include:

Determine the index of the TCI-state combination according to the value of the TCI field in the DCI; determine the index of each TCI-state contained therein according to the index of the TCI-state combination; determine each DMRS according to the index of each TCI-state TCI-state corresponding to the port, DMRS port group, or CDM group of DMRS port.

Combining the above scheme, where:

TCI-state corresponds to DMRS port, DMRS port group or CDM group of DMRS port according to index from small to large or from large to small; TCI-state corresponds to DMRS port, DMRS port group or DMRS port in the order of index from small to large The CDM groups of DMRS correspond one-to-one according to the index from big to small; or TCI-state corresponds to the DMRS port, DMRS port group or CDM group of DMRS port according to the index from small to big in the order of decreasing index. .

In combination with the above solution, the configuration information may also include one or more TCI-states; for example, an index of the one or more TCI-states;

In combination with the above solution, a part of the bits of the MAC-CE is used to activate part or all of the TCI-state combination, and the other part of the bits is used to activate part or all of the TCI-state; or, one MAC-CE is used to activate part or all of the TCI-state. State combination, another MAC-CE is used to activate part or all of TCI-state;

In combination with the above solution, among all the values of the TCI field, some of the values correspond to the TCI-state combination, and the other part of the values correspond to the TCI-state.

In each of the above solutions, TCI-state combinations are used, and each TCI-state combination may include one or more TCI-states. The network device can indicate multiple TCI-states by indicating the TCI-state combination, thereby realizing the TCI-state indication for multi-beam/multi-TRP transmission.

The following describes the devices corresponding to the above methods.

A communication device. The device may be a terminal device or a network device in each of the above methods, and may also be a chip or a functional module in the terminal device or the network device. The device has the function of realizing terminal equipment or network equipment in each of the above methods. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the device includes: a transceiver module, or called a communication module, which may include a sending module and/or a receiving module; used to implement signal transceiver functions; optionally, the device also includes a processing module, Used to implement processing functions other than signal transmission; the transceiver module may be, for example, at least one of a transceiver, a receiver, and a transmitter, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor. Optionally, the device further includes a storage module, which may be a memory, for example. When a storage module is included, the storage module is used to store computer programs or instructions. The processing module is connected to the storage module, and the processing module can execute the program or instruction stored in the storage module, or is derived from other programs or instructions, so that the device executes any one of the methods described above.

Among them, the processor mentioned in any of the above can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for controlling the above All aspects of the communication method program execution integrated circuit.

On the other hand, a computer storage medium is provided, and the computer storage medium stores a computer program, and when the computer program is executed by a computer or a processor, the methods of the above aspects are implemented.

On the other hand, a computer program product containing instructions is provided, which when running on a computer, causes the computer to execute the methods of the above-mentioned various aspects.

In another aspect, a communication system is provided. The communication system includes the aforementioned network device and terminal device.

In another aspect, a processor is provided, which is configured to be coupled with a memory and used to execute the methods of the above-mentioned various aspects.

In another aspect, a chip is provided. The chip includes a processor and a communication interface, where the communication interface is used to communicate with an external device or an internal device, and the processor is used to implement the above-mentioned methods.

Optionally, the chip may further include a memory in which a computer program or instruction is stored, and the processor is configured to execute the computer program or instruction stored in the memory, or is derived from other programs or instructions. When the program or instruction is executed, the processor is used to implement the above-mentioned methods.

Optionally, the chip can be integrated on terminal equipment or network equipment.

Description of the drawings

Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present application.

Figure 2 shows the flow chart of the TCI-state indication method in the R15 protocol.

FIG. 3 is a schematic diagram of a MAC CE structure for activating TCI-state according to an embodiment of the present application.

Fig. 4 is a flowchart of a TCI-state indication method according to an embodiment of the present application.

FIG. 5 is a schematic diagram of a MAC CE structure for activating a TCI-state combination according to an embodiment of the present application.

Fig. 6 is a flowchart of a TCI-state indication method according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a MAC CE structure for activating a combination of TCI-state and TCI-state according to an embodiment of the present application.

FIG. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application.

FIG. 9 is a schematic block diagram of another communication device provided by an embodiment of the present application.

FIG. 10 is a schematic block diagram of another communication device provided by an embodiment of the present application.

FIG. 11 is a schematic block diagram of still another communication device provided by an embodiment of the present application.

FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The embodiments of this application are applicable to beam-based multi-carrier communication systems, such as global system for mobile communications (GSM) systems, code division multiple access (CDMA) systems, and broadband code division multiple access (GSM) systems. wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division Duplex (time division duplex, TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, and fifth generation (5G) communication System or New Radio (NR), etc., and the future sixth-generation communication system.

FIG. 1 shows a schematic diagram of a communication system 100 applicable to the embodiments of the present application. As shown in the figure, the communication system 100 may include at least one network device, such as the network device 110 shown in FIG. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. 1. The network device 110 and the terminal device 120 may communicate through a wireless link.

Each communication device, such as the network device 110 or the terminal device 120 in FIG. 1, may be configured with multiple antennas. The plurality of antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device additionally includes a transmitter chain and a receiver chain. Those of ordinary skill in the art can understand that they can all include multiple components related to signal transmission and reception (for example, processors, modulators, multiplexers). Converter, demodulator, demultiplexer or antenna, etc.). Therefore, multiple antenna technology can be used to communicate between network devices and terminal devices.

It should be understood that the network device in the wireless communication system may be any device with a wireless transceiver function. The equipment includes, but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC) , Base transceiver station (Base Transceiver Station, BTS), home base station (for example, Home evolved NodeB, or Home Node B, HNB), baseband unit (BaseBand Unit, BBU), wireless fidelity (Wireless Fidelity, WIFI) system Access point (Access Point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be 5G, such as NR , The gNodeB (gNB, base station) in the system, or the transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of the base station in the 5G system, or it can also form a gNB or transmission The network node of the point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless link The functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , Or, sent by DU+CU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.

It should also be understood that the terminal equipment in the wireless communication system may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in unmanned driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes. The embodiment of this application does not limit the application scenario.

In order to facilitate the understanding of the embodiments of the present application, the following first briefly introduces several terms involved in the present application.

1. Beam

One of the main problems of high-frequency communication is that the signal energy drops sharply with the transmission distance, resulting in a short signal transmission distance. In order to overcome this problem, high-frequency communication adopts analog beam technology, and performs weighting processing through a large-scale antenna array to concentrate the signal energy in a small range to form a beam-like signal (called analog beam, or beam for short). ) To increase the transmission distance.

The beam is a communication resource. The beam can be a wide beam, or a narrow beam, or other types of beams. The beam forming technology may be beamforming technology or other technical means. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, and a hybrid digital/analog beamforming technology. Different beams can be considered as different resources. The same information or different information can be sent through different beams. Optionally, multiple beams with the same or similar communication characteristics may be regarded as one beam. A beam can be formed by one or more antenna ports, used to transmit data channels, control channels, and sounding signals. One or more antenna ports forming a beam can be regarded as an antenna port set.

The beam includes a transmitting beam and a receiving beam. The transmit beam may refer to the distribution of signal strength formed in different directions in space after a signal is transmitted through the antenna, and the receive beam may refer to the distribution of the antenna array to strengthen or weaken the reception of wireless signals in different directions in space.

In the current NR protocol, the beam information can be indicated by the antenna port quasi colocation (quasi colocation, QCL for short) relationship. Specifically, the indication information (for example, downlink control information (DCI)) may indicate that one resource (or antenna port) and another resource (or antenna port) have a quasi co-location relationship to indicate the two The beams corresponding to each resource (or antenna port) have the same spatial characteristics, and the same receiving beam can be used for reception. The beam can be specifically represented by various signal identifiers in the protocol, such as the resource index of the channel state information reference signal (CSI-RS), and the synchronous signal broadcast channel block (synchronous signal/physical broadcast channel). A block may be referred to as SS/PBCH block or SSB for short) index, sounding reference signal (SRS) resource index, and tracking reference signal (tracking reference signal, TRS) resource index.

In addition, in general, a beam and a demodulation reference signal (DMRS) port/port group or a transmission configuration index (TCI) or a TRP or a sounding reference signal resource indicator ( SRS resource indicator, SRI for short) (used for uplink data transmission) corresponds. Therefore, different beams can also be represented by different DMRS ports/port groups or TCI or TRP or SRI.

Since DMRS port/port group, TCI, TRP, SRI, CSI-RS resource index, SS/PBCH block index, SRS resource index and TRS resource index can all represent beams, the following DMRS ports/port groups and TCI can also be replaced with beam, TRP, SRI, CSI-RS resource index, SS/PBCH block index, SRS resource index, or TRS resource index, and this replacement does not change the essence of the method provided in the embodiments of the present application.

2. Quasi-co-location (QCL): or quasi-co-location. The QCL relationship is used to indicate that multiple resources have one or more identical or similar communication characteristics. For multiple resources with a co-location relationship, the same or similar communication configuration can be adopted. For example, if two antenna ports have a QCL relationship, then the large-scale characteristics of the channel for one port to transmit a symbol can be inferred from the large-scale characteristics of the channel for the other port to transmit a symbol. The reference signals corresponding to the antenna ports with the QCL relationship have the same parameters, or the parameters of one antenna port can be used to determine the parameters of the other antenna port that has the 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, spatial reception parameters (spatial Rx parameters). Among them, the spatial reception parameters can include one or more of the following: angle of arrival (angle of arrival, AOA), average AOA, AOA extension, angle of departure (angle of departure, AOD), average departure angle AOD, AOD extension, reception Antenna spatial correlation parameter, transmit antenna spatial correlation parameter, transmit beam, receive beam, and resource identification.

Wherein, the above-mentioned angle may be decomposition values of different dimensions, or a combination of decomposition values of different dimensions. Antenna ports are antenna ports with different antenna port numbers, and/or antenna ports that have the same antenna port number for information transmission or reception in different time and/or frequency and/or code domain resources, and/or have different Antenna port number The antenna port for information transmission or reception in different time and/or frequency and/or code domain resources. The resource identifier may include: CSI-RS resource identifier, or SRS resource identifier, or SSB resource identifier, or the resource identifier of the preamble sequence transmitted on the Physical Random Access Channel (PRACH), or the demodulation reference signal ( The demodulation reference signal (DMRS) resource identifier is used to indicate the beam on the resource.

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

Type A (type A): Doppler frequency shift, Doppler spread, average delay, and delay spread;

Type B (type B): Doppler frequency shift, Doppler spread;

Type C (type C): Doppler frequency shift, average delay; and

Type D (type D): Space receiving parameters.

The QCL involved in the embodiment of the present application is a type D QCL. In the following, unless otherwise specified, QCL can be understood as QCL of type D, that is, QCL defined based on spatial reception parameters, referred to as spatial QCL.

When the QCL relationship refers to the QCL relationship of type D, it can be considered as spatial QCL (spatial QCL). When the antenna port meets the spatial QCL relationship, the QCL relationship between the downlink signal port and the downlink signal port, or between the uplink signal port and the uplink signal port, can be that the two signals have the same AOA or AOD. Yu means the same receiving beam or transmitting beam. For another example, for the QCL relationship between the downlink signal and the uplink signal or between the ports of the uplink signal and the downlink signal, the AOA and AOD of the two signals may have a corresponding relationship, or the AOD and AOA of the two signals may have a corresponding relationship, that is, the beam can be used Reciprocity: Determine the uplink transmit beam according to the downlink receive beam, or determine the downlink receive beam according to the uplink transmit beam.

From the perspective of the transmitter, if the two antenna ports are spatial QCL, it can mean that the corresponding beam directions of the two antenna ports are spatially consistent. From the perspective of the receiving end, if the two antenna ports are spatial QCL, it can mean that the receiving end can receive the signals sent by the two antenna ports in the same beam direction.

The signal transmitted on the port with the spatial QCL relationship may also have a corresponding beam, and the corresponding beam includes at least one of the following: the same receiving beam, the same transmitting beam, and the transmitting beam corresponding to the receiving beam (corresponding to the reciprocal Scene), the receiving beam corresponding to the transmitting beam (corresponding to the scene with reciprocity).

The signal transmitted on the port with the spatial QCL relationship can also be understood as using the same spatial filter to receive or transmit the signal. The spatial filter may be at least one of the following: precoding, weight of the antenna port, phase deflection of the antenna port, and amplitude gain of the antenna port.

The signal transmitted on the port with the spatial QCL relationship can also be understood as having a corresponding beam pair link (BPL), and the corresponding BPL includes at least one of the following: the same downlink BPL, the same uplink BPL, and the downlink BPL The corresponding uplink BPL, the downlink BPL corresponding to the uplink BPL.

Therefore, the spatial reception parameter (ie, QCL of type D) can be understood as a parameter for indicating the direction information of the reception beam.

3. QCL indication and QCL assumption

The introduction of QCL has stated that if two antenna ports have a quasi-co-location relationship, then the large-scale characteristics of the channel for one port to transmit a symbol can be inferred from the large-scale characteristics of the channel for the other port to transmit a symbol. Therefore, when the base station indicates that there is a QCL relationship between two ports, the terminal should assume that the large-scale characteristics of the channel for transmitting one symbol on the two ports are consistent. For example, the large-scale characteristics of the channel for transmitting a symbol on one port are known, and the same assumption can be adopted for the large-scale characteristics of the channel for transmitting a symbol on another port.

4. Transmission configuration indicator (TCI) state: it can be used to indicate the QCL relationship between the two reference signals. Each TCI state may include a serving cell index (ServeCellIndex), a bandwidth part (BWP) identifier (ID), and a reference signal resource identifier. The reference signal resource identifier may be, for example, at least one of the following: Non-zero power (NZP) CSI-RS reference signal resource identifier (NZP-CSI-RS-ResourceId), non-zero power CSI-RS reference signal resource set identifier (NZP-CSI-RS-ResourceSetId) or SSB Index (SSB-Index).

The definition of TCI in 3GPP is: Indicating a transmission configuration which includes QCL-relationships between the DL RSs in one RS set and the PDSCH DMRS ports.

The Chinese translation is as follows: indicates the transmission configuration, including the QCL relationship between the downlink signal [port] and the PDSCH DMRS port in a reference signal set.

TCI can be used to indicate the QCL information of the physical downlink control channel (physical downlink control channel, PDCCH)/physical downlink shared channel (physical downlink shared channel, PDSCH), and can be specifically used to indicate the reference signal of the PDCCH/PDSCH DMRS If the QCL relationship is satisfied, the terminal can receive the PDCCH/PDSCH by using the same or similar spatial parameters (for example, receiving beam) as the spatial parameters of the reference signal.

In the TCI, the reference signal index may be used to indicate which reference signal the DMRS of the PDCCH/PDSCH satisfies the QCL relationship with.

In the 3GPP R15 protocol, the network device uses the TCI field in the DCI to indicate to the terminal device related information about the transmission beam used by the network device. For example, when the size of the TCI field is 3 bits, it can specifically represent 8 different values (codepoint in the protocol), and each value corresponds to a TCI-state index, and the TCI-state index can uniquely identify a TCI-state. TCI-state includes several parameters, through which the relevant information of the transmission beam can be determined. TCI-state is configured by network equipment to each terminal device. The structure of TCI-state is as follows:

Each TCI-state includes its own index tci-StateId and two QCL-Info. Each QCL-Info includes a cell field and bwp-Id, which respectively indicate which bwp (Bandwidth part) of which cell (cell) the TCI-state is applied to. Therefore, different bwp of different cells or the same cell can be configured Different QCL-Info. QCL-Info also includes a referenceSignal (reference signal), which is used to indicate the resource using the TCI state (this application refers to the resource or beam used for data transmission) and which reference signal resource constitutes a QCL (quasi-co-location, quasi-co-location) )relationship. In the R15 protocol, the term "beam" is generally not used directly, and beams are generally replaced by other terms. For example, in data transmission and channel measurement, beams correspond to reference signal resources, and one beam corresponds to one reference signal resource. Therefore, what reference signal resource constitutes a QCL relationship with here essentially refers to which beam constitutes a QCL relationship with. The QCL relationship means that two reference signal resources (or two antenna ports, the antenna port and the reference signal resource are also in a one-to-one correspondence) have some same spatial parameters. Which spatial parameters are the same depends on the type of the QCL-Info, that is, another field qcl-Type of the QCL-Info. qcl-Type can have four values {typeA, typeB, typeC, typeD}. Taking typeD as an example, typeD indicates that the two reference signal resources have the same spatial reception parameter (Spatial Rx parameter) information, that is, the two beams have the same reception beam. At most one of the two QCL-Info included in the TCI-state can be TypeD.

The following takes a high-frequency communication scenario as an example to explain in detail how the network device based on the R15 protocol indicates the TCI-state to the terminal device, including the configuration, activation, and indication of the TCI-state. Referring to FIG. 2, the method includes.

S101, TCI-state configuration

The network device configures multiple TCI-states, such as 64, 128, etc., to the terminal device through RRC (Radio resource control) signaling, and the configuration content includes the index of each TCI-state.

For example, in a high frequency scenario, these TCI-states all include a typeD QCL-Info, and the terminal device can determine the receiving beam according to the QCL-Info. For example: when a TCI-state only includes one QCL-Info of typeD, and the QCL-Info only includes one reference signal, it can be considered that one TCI-state corresponds to one receiving beam.

S102, TCI-state activated

After the network device configures multiple TCI-states for the terminal device, it activates some of the TCI-states through MAC-CE (Medium Access Control-Control Element). For example, if 8 of them are activated, these 8 TCI states have a one-to-one correspondence with the 8 values of the TCI field (3 bits) in the DCI. That is, which 8 TCI-states correspond to the 8 values represented by the TCI word of the DCI are determined through MAC CE signaling. The MAC CE structure used to activate TCI-state is shown in Figure 3. Among them, the fields T0 to T(N-2)x8+7 respectively correspond to the respective TCI-states configured in the first step with an index of 0 to (N-2)x8+7. The size of each field is 1bit, and the value can be 0 or 1. A value of 1 means that the TCI-state is activated, a value of 0 means that the TCI-state is not activated, and vice versa. The value of N is related to the size of MAC CE. The size of MAC CE is variable and related to the number of TCI-states to be activated. In theory, each MAC CE can have 8 activation fields with a value of 1, and the rest are all 0. The TCI-states corresponding to the 8 fields with a value of 1 are the 8 TCI-states corresponding to the 8 values of the TCI field in the DCI. For example, the minimum value of 000 in the TCI field corresponds to the TCI-state with the smallest active index in the MAC CE, and so on. There are many types of MAC-CE, in addition to the MAC-CE used for TCI-state activation, there are many other types of MAC-CE. This application only relates to MAC-CE used for TCI-state/TCI-state combined activation. Therefore, unless otherwise specified, the MAC-CE described in this application refers to this type of MAC-CE.

S103, TCI-state indication

The network device indicates a specific TCI-state through the TCI field in the DCI. Based on the TCI-state, the terminal device can determine which reference signal the DMRS port of the PDSCH (physical downlink shared channel) has a QCL relationship with , So as to adopt the corresponding receiving mechanism. Taking high-frequency communication as an example, the value of the TCI field in the DCI sent by the network device to the terminal device is 000, indicating that the TCI-state used for data transmission is the TCI-state corresponding to 000. The terminal device can further determine according to the TCI-state Information about the receiving beam corresponding to the data sending beam. For example: the referenceSignal contained in the QCL-Info whose type is typeD in the TCI-state is CSI-RS (Channel State Information-Reference Signal) with index #1, indicating that the data transmission beam corresponds to The receiving beam of is the same as the receiving beam corresponding to the CSI-RS with index #1. The receiving beam corresponding to the CSI-RS with index #1 can be determined through a beam measurement procedure, which is known to the terminal device. Therefore, through the specific value of the TCI field, the terminal device can determine the receiving beam corresponding to the data transmitting beam, and thus adopt the corresponding receiving beam to receive the data issued by the network device.

Through the above method, the network device can indicate to the terminal device the information of the receiving beam corresponding to the data sending beam. However, the above method is limited to single beam/single TRP (Transmitter Receiver Point) transmission. When a network device uses multiple beams or multiple TRPs to transmit data to a terminal device, it needs to indicate multiple TCI-states to the terminal device. However, the method using the aforementioned R15 protocol can only achieve a single TCI-state indication, and therefore cannot achieve multi-beam/multi-TRP transmission.

In summary, the above-mentioned TCI-state indication method in R15 is only suitable for single-beam/single TRP transmission scenarios, because the TCI field in DCI can only determine one TCI-state, while multi-beam/multi-TRP transmission needs to indicate multiple TCI-state.

In the above-mentioned TCI-state indication method, the network device can only indicate one TCI-state to the terminal device. When a network device uses multiple beams or multiple TRPs to transmit data to a terminal device, the network device needs to indicate multiple TCI-states to the terminal device so that the terminal device can determine the receiving beam information corresponding to the multiple transmission beams.

In the R15 protocol, network devices can configure a series of TCI states, and then use a MAC-CE to activate 8 of them. The 8 activated TCI states correspond to the values of the 8 TCI fields in the DCI one-to-one. This mechanism can be applied to realize the association between a single TCI field value and multiple TCI states, and it can be realized with only a small amount of modification to the RRC configuration. Specifically, in addition to TCI state, network equipment also needs to configure a series of TCI state combinations. Each TCI state combination contains one or two TCI states. Then, 8 of them are activated through a MAC-CE. The 8 activated TCI state combinations have a one-to-one correspondence with the values of the 8 TCI fields in the DCI. The MAC-CE format used is the same as the MAC CE format used to activate TCI-state. The terminal device needs to determine whether the MAC CE is used to activate the TCI state or the TCI state set (TCI state combination). Specifically, it can be indicated through RRC signaling or some implicit indication information, such as whether the TCI state set is configured. This mechanism only needs to modify the RRC configuration, and does not need to enhance MAC and DCI.

In order to realize multi-beam transmission/multi-TRP transmission, this application proposes a TCI-state indication method, refer to Figure 4

S201: Configure TCI-state combination

The network device sends RRC configuration information to the terminal, and the configuration information includes the configuration of one or more TCI-state combinations. Each TCI-state combination includes one or more TCI-states, so the configuration information of each TCI-state combination includes the index of the TCI-state combination and the index of each TCI-state included in the TCI-state combination. When the TCI-state combination includes a single TCI-state, the TCI-state combination can be used to indicate the TCI-state of single beam/single TRP transmission. When the TCI-state combination includes multiple TCI-states, the TCI-state combination can be used to indicate multiple TCI-states for multi-beam/multi-TRP transmission.

Note that in addition to configuring the TCI-state combination in this step, the network device can also configure the TCI-state. The configuration method is the same as that described in S101, and will not be repeated.

S202: Activate the TCI-state combination

The network device sends MAC-CE signaling to the terminal device to activate part or all of the TCI-state combination. As shown in FIG. 5, MAC-CE signaling in a format similar to that used for activating TCI-state in S102 can be used to activate the TCI-state combination. The MAC-CE includes multiple activation fields Si with a size of 1 bit, and the specific values can be 0 and 1. Note that Si is only used as an example and does not limit the naming of fields. A value of 1 means that the corresponding TCI-state combination (the TCI-state combination with index i) is activated, and a value of 0 means that it is not activated. Or vice versa, a value of 1 indicates that the corresponding TCI-state combination is not activated, and a value of 0 indicates activation. The MAC CE can activate M TCI-state combinations, and these M TCI-state combinations have a one-to-one correspondence with each value of the TCI field in the DCI. The M TCI-state combinations can correspond to each value of the TCI field in the DCI in the descending order of the value in the descending order of the index, or the M TCI-state combinations can be in the descending order of the index. Each value of the TCI field in the DCI corresponds to one-to-one in the order of value from large to small. For example, the TCI-state with the smallest index among the M TCI-states corresponds to 000, the smallest value of the TCI field, and the TCI-state with the second smallest index among the M TCI-states corresponds to 001, the second smallest value of the TCI field. And so on. For example, M=8, the 8 TCI-state combinations activated in MAC CE are {S0, S1, S4, S6, S7, S9, S11, S13} according to the index, and these 8 TCI-states are in turn with The 8 values of the TCI field {000,001,010,011,100,101,110,111} correspond one-to-one. When the value of the TCI field in the DCI is 011, it indicates that the TCI-state combination activated by S6 (that is, the TCI-state with index 6) is used. Of course, the activated M TCI-state combinations can also correspond one-to-one with the M values of the TCI field in the descending order of value according to the index ascending order, or the M TCI-state combinations can also be assigned from the index according to the index. The order of large to small corresponds to the M values of the TCI field in the order of value from small to large. For example, the TCI-state with the smallest index among the M TCI-states corresponds to the maximum value of the TCI field 111, and the TCI-state with the second smallest index among the M TCI-states corresponds to the second largest value 110 in the TCI field. And so on. Other corresponding methods can also be used, which are not limited in this application. In the existing protocol, the MAC-CE activates 8 TCI-states at most, and the value of the TCI field (3 bits) is also 8. This application does not limit the maximum number of activated TCI-state combinations, which can be 8, or other values, and only need to increase the number of bits in the TCI field.

Since the MAC-CE format for activating the combination of TCI-state and TCI-state is similar, when a terminal device receives a MAC-CE, it cannot determine whether the MAC-CE is used to activate TCI-state or is used to activate TCI-state Combination, that is, it is impossible to determine whether any one of the activation fields corresponds to the TCI-state or the TCI-state combination. Therefore, the network device needs to indicate to the terminal device the type of the MAC CE, that is, whether the MAC CE is used to activate the TCI-state or the TCI-state combination. This application provides the following methods:

Display instructions

1. It is indicated by a field in the aforementioned MAC-CE format, for example, by the first field R. R is a reserved field with a size of 1 bit. Currently R15 has not defined the purpose of this field, so this field can be used to indicate the type of MAC-CE. The value of the R field can be 0 or 1. 0 indicates that the MAC-CE is used to activate the TCI-state, and 1 is used to indicate that the MAC-CE is used to activate the TCI-state combination. Or vice versa, 0 indicates that the MAC-CE is used to activate the TCI-state combination, and 1 is used to indicate that the MAC-CE is used to activate the TCI-state. The MAC-CE can be the MAC-CE in S202 or a separate MAC-CE. Of course, other fields or bits of MAC-CE can also be used for indication, which is not limited in this application.

2. Configure through RRC signaling. The network device directly indicates to the terminal device the type of MAC CE sent by the network device to the terminal device through a field of the RRC signaling. For example, a 1-bit field is used to indicate whether the MAC CE sent by the network device to the terminal device is used to activate the TCI-state or the TCI-state combination. For example, the value of 1 bit can be 0 or 1, and 0 means the MAC -CE is used to activate the TCI-state, 1 is used to indicate that the MAC-CE is used to activate the TCI-state combination, and vice versa. The RRC can be the RRC in S201 or a separate RRC.

Implicit instructions

1. Judge by the transmission mode parameter. When a network device uses multi-beam/multi-TRP to transmit data to a terminal device, it will send instruction information to the terminal device. The instruction information is used to indicate that the network device will use a multi-beam/multi-TRP transmission mode to transmit data to the terminal device. The indication information may be sent through RRC or MAC-CE or DCI. If the terminal device receives the instruction information, the MAC-CE sent to it by the network device is used to activate the TCI-state combination, otherwise, the terminal device defaults that the MAC-CE sent to it by the network device is used to activate TCI- state.

2. Determine by measuring the configuration reported by the group in the configuration information. That is, it is determined by the value of groupBasedBeamReporting in the measurement configuration information that the terminal device recently received from the network device. Specifically, if the value of the parameter groupBasedBeamReporting is configured as enabled, the MAC-CE sent to it by the default network device is used to activate the TCI-state combination, otherwise, the MAC-CE sent to it by the default network device is used to activate TCI -State, groupBasedBeamReporting is beam group report.

3. Determine whether the TCI-state combination is configured by RRC signaling. If the network device configures the terminal device with the TCI-state combination, the terminal device defaults that the MAC-CE sent to it by the network device is used to activate the TCI-state combination, otherwise the terminal device defaults to the MAC-CE sent to it by the network device Used to activate TCI-state.

4. A combination of the above three implicit indication methods can also be used. When one or more of the above three methods implicitly indicate that the MAC-CE is used to activate the TCI-state combination, the terminal device considers the network device to send Its MAC-CE is used to activate the TCI-state combination, otherwise it is considered to be used to activate the TCI-state. For example, when the value of groupBasedBeamReporting is configured as enabled and the network device configures the TCI-state combination on the terminal device (that is, the

above methods

2 and 3 are all satisfied), the terminal device defaults that the MAC-CE sent to it by the network device is used to activate TCI -state combination, otherwise the terminal device defaults that the MAC-CE sent to it by the network device is used to activate the TCI-state; of course, the

above methods

1 and 2 can be used for conditional combination, 2 and 3 for conditional combination or method 1. 3 make a combination of conditions, or need to meet the

above methods

1, 2 and 3.

S203: Indicate the TCI-state combination

When a network device uses multi-beam/multi-TRP to transmit data to the terminal device, it indicates multiple TCI-states to the terminal device through the TCI field in the DCI. This indication mode is similar to the indication mode in 103. For example, the network device sends data to the terminal device through two beams/TRP, and sends the corresponding DCI to the terminal device. According to the TCI field in the DCI, the terminal device determines the TCI-state combination corresponding to the two transmission beams/TRP used by the network device, and determines the TCI-state corresponding to the two beams/TRPs according to the two TCI-states included in the TCI combination. state to achieve multi-beam/TRP transmission. There is a one-to-one correspondence between multiple beams or multiple TRPs used to transmit data and multiple TCI-states in the TCI-state combination. During data transmission, the network device does not directly indicate the beam or TRP for data transmission to the terminal device, but indicates the DMRS port, DMRS port group or DMRS port corresponding to each beam/TRP. Code division multiplexing (CDM) )group. Therefore, the correspondence between beam/TRP and TCI-state is essentially the correspondence between DMRS port/DMRS port group/DMRS port CDM group and TCI-state. Each TCI-state combination can correspond to the CDM group of each DMRS port/DMRS port group/DMRS port in the descending order of index according to the index ascending order, or each TCI-state combination can be in descending index order. The small order corresponds to the CDM group of each DMRS port/DMRS port group/DMRS port in descending order of index, for example, the TCI-state with the smallest index and the DMRS port/DMRS port group/DMRS port with the smallest index Corresponding to the CDM group, the TCI-state with the second smallest index corresponds to the CDM group of the DMRS port/DMRS port group/DMRS port with the second smallest index, and so on; of course, each TCI-state combination can be as small as possible according to the index The big order corresponds to the CDM group of each DMRS port/DMRS port group/DMRS port according to the index from big to small, or each TCI-state combination can be linked to each DMRS port/DMRS according to the index from big to small. The port group/CDM group of the DMRS port corresponds one-to-one according to the index from small to large. Other rules can also be followed, and no examples are given here.

Through the TCI-state indication method of the above embodiment, when the network device uses multi-beam/multi-TRP to transmit data, it can indicate to the terminal device the TCI-state information of each transmission beam/TRP it uses, thereby realizing multi-beam/multi-TRP. TRP transmission.

In actual scenarios, as the terminal device moves, its channel environment will change, resulting in a change in the transmission mechanism adopted by the network device, that is, switching between single beam/multi-TRP transmission and multi-beam/multi-TRP transmission . When the network device wants to switch the transmission mode, for example, when switching from multi-beam transmission to single-beam transmission, the TCI-state information it indicates to the terminal device will change from a combination of TCI-state to a single TCI-state. This requires that the M values indicated by the TCI field in the DCI must have corresponding TCI-state and corresponding TCI-state combinations. For example, 4 of the 8 values of the TCI field correspond to the index of the TCI-state, and 4 correspond to the index of the TCI-state combination. In the previous embodiment, configuring some TCI combinations to include only a single TCI-state can also solve this problem, but that is only one of the solutions. This embodiment also discloses a TCI-state indication method to solve the above The problem, as shown in Figure 6, the method includes:

S301: Configure the combination of TCI-state and TCI-state

The network device sends RRC configuration information to the terminal, and the configuration information includes the configuration of the combination of TCI-state and TCI-state. The configuration of TCI is similar to S101, please refer to the description of S101; the configuration of TCI-state combination S201 is similar, refer to the description of S201; that is, this step includes the content of S101 and S201.

S302: Activate the combination of TCI-state and TCI-state

The network device needs to activate one or more TCI-states and one or more TCI-state combinations at the same time, which are respectively used to indicate beam information for single beam/single TRP transmission and multi-beam/multi-TRP transmission. The network device can use two MAC-CEs to activate the TCI-state and the TCI-state combination respectively, and the activation method and MAC-CE content can refer to the content of S102 and S202 respectively.

In addition, only one MAC-CE may be used to activate the combination of TCI-state and TCI-state. Specifically, the following MAC-CE format can be used to activate the combination of TCI-state and TCI-state.

1. The MAC-CE includes two bitmaps, that is, two partial bits, which are used to activate the TCI-state and TCI-state combination. For example, as shown in FIG. 7, the first bitmap, that is, each bit field Ti of the first part of bits is used to indicate the activation/deactivation of the TCI-state with the index i. 1 means active, 0 means inactive, or vice versa, 1 means inactive, and 0 means active. The second bitmap, that is, each bit field Si of the second part of bits is used to indicate the activation/deactivation index of the TCI-state combination of i. 1 means active, 0 means inactive, or vice versa, 1 means inactive, and 0 means active. The positional relationship between the two bitmaps can be that the bitmap used for TCI-state activation comes first, and the bitmap used for TCI-state combined activation comes later, or the bitmap used for TCI-state combined activation comes first, and is used for TCI-state activation. The bitmap activated by state is behind. Which location relationship to use can be indicated by RRC or MAC-CE, for example by RRC in S301 or MAC-CE in S302, or by a separate RRC or MAC-CE, or by default in the agreement .

2. The MAC-CE includes a bitmap (that is, partial bits) and one or more index fields. The bitmap is used to activate the TCI-state, and one or more index fields indicate the index of the activated one or more TCI-state combinations. Alternatively, the bitmap is used to activate the TCI-state combination, and one or more index fields indicate the index of one or more activated TCI-states. The positional relationship between the bitmap and the index field in the MAC-CE can be: the bitmap is in the front and the index fields are in the back; or the bitmap is in the back, and the index fields are in the front. It can also be other relationships, for example, bitmap is located between index fields. The specific location relationship can be indicated through RRC signaling or MAC-CE. The indication method is similar to the case in 1 above, and it can also be specified by the protocol by default. The number of index fields included in the MAC-CE can be indicated by RRC signaling or MAC-CE, or can be specified by the protocol by default. The indication method is similar to the situation in 1 above, and will not be repeated here.

3. MAC-CE includes multiple index fields, of which part of the index field (one or more) is used to indicate the index of one or more active TCI-states, and the remaining part of the index field (one or more) is used for Indicates the index of one or more TCI-state combinations activated. Each field of the index used to indicate the TCI-state and each field of the index used to indicate the TCI-state combination may be arranged according to a specific rule. For example, the first m index fields indicate the index of TCI-state, and the last n index fields indicate the index of the TCI-state combination. Or conversely, the first m indexes are the indexes of the TCI-state combination, and the last n indexes are the indexes of the TCI-state. Other rules may also be adopted, for example, the number of index fields corresponding to the TCI-state and the index fields corresponding to the TCI-state combination are the same and arranged in a cross-wise arrangement. The specific arrangement rule to be used can be indicated through RRC signaling or MAC-CE. The indication method is similar to the case in 1 above, and there may also be protocol default provisions. The values of m and n can be indicated through RRC signaling or MAC-CE, and can also be specified by default by the protocol; the indication method is similar to the case in 1 above, and will not be repeated.

S303: Indicate the combination of TCI-state and TCI-state

Through step S302, the network device can activate one or more TCI-states and one or more TCI-state combinations. The corresponding manners of these TCI-state and TCI-state combinations and the values of the TCI field in the DCI can be any of the following:

Among all the values of the TCI field, the lowest x values correspond to x TCI-states, and the remaining values correspond to each TCI-state combination.

Among all the values of the TCI field, the lowest x values correspond to x TCI-state combinations, and the remaining values correspond to each TCI-state.

Among all the values of the TCI field, the highest x values correspond to x TCI-states, and the remaining values correspond to each TCI-state combination.

Among all the values of the TCI field, the highest x values correspond to x TCI-state combinations, and the remaining values correspond to each TCI-state.

The above-mentioned finger indication examples are not limited to the above-mentioned manners, and other corresponding manners may also be adopted. For example, the middle x values correspond to x TCI-states, and the remaining values correspond to various TCI-state combinations, and vice versa.

The following takes the first method as an example for detailed description, and other methods are similar. Assuming x=2, the size of the TCI field is 3 bits, and there are 8 values in total. The lowest x=2 values (ie, 000 and 001) correspond to x=2 TCI-states, and the remaining 6 values (010 to 111) correspond to 6 TCI-state combinations. The corresponding manner of each TCI-state and the corresponding TCI field value, and the corresponding manner of each TCI-state combination and the corresponding TCI field value are similar to the corresponding manner of each TCI-state and each TCI field value in S203.

Which of the above methods and the specific value of x can be configured by the network device through RRC signaling or MAC-CE or DCI. It can be the RRC signaling or MAC-CE or DCI in the above steps, or it can be a separate RRC. Signaling or MAC-CE or DCI, the indication method is similar to the situation in 1 above, and it can also be specified by the protocol by default.

Regardless of the specific corresponding method, the corresponding method can only take effect when the specific conditions are met. For example, the terminal device determines to use the first TCI field of the above four corresponding methods as the corresponding method for each combination of TCI-state and TCI-state according to the default provisions of the protocol or the instruction information of the network device. However, if the network device does not configure the TCI-state combination for the terminal device, all values of the TCI field still correspond to the TCI-state instead of the TCI-state combination. Only when the network device configures the TCI-state combination on the terminal device, will the first corresponding relationship be actually enabled. That is, it will take effect only when the condition of "TCI-state combination is configured". The above condition is only an example, and both the display indication or the implicit indication mentioned in the above embodiment can be used; the specific conditions used are not limited in this application.

Or, in another embodiment, no matter which specific corresponding method is adopted, the corresponding method is always effective. For example, the terminal device determines to use the first of the above four corresponding methods as the corresponding method of the TCI field and each TCI-state and TCI-state combination according to the default provisions of the protocol or the network device instruction information, then the corresponding method is directly effective , No conditions need to be met.

In addition to the above 4 methods, other corresponding methods can also be used, which are not limited in this application. Which other corresponding method is adopted can also be specified by the protocol by default or the network equipment can indicate through RRC signaling or MAC-CE or DCI. The above signaling can reuse the signaling or messages mentioned in the above steps, or it can be Individual signaling or message. When other corresponding methods are adopted, the method may always take effect, or it can take effect only when certain conditions are met. You can refer to the above-mentioned implicit indication and display indication conditions, which are not limited in this application.

In each of the foregoing method embodiments, the steps of configuration, activation, and instruction are included. In actual applications, it may be configured once, and there may be multiple activations and instructions in a subsequent period of time, or it may be activated once and multiple instructions in a subsequent period of time; In addition, there may be no configuration steps, only activation and instructions; or no activation steps, only configuration and instructions; therefore, there are many situations in actual applications.

In each of the above solutions, the activated TCI-state or TCI-state combination indicated by the TCI is one. In other examples, there may be multiple activated TCI-state combinations.

In each of the above solutions, TCI-state combinations are used, and each TCI-state combination may include one or more TCI-states. The network device can indicate multiple TCI-states by indicating the TCI-state combination, thereby realizing the TCI-state indication of multi-beam/multi-TRP transmission; further, the flexibility of indication is enhanced.

Based on the method of the foregoing embodiment, the communication device provided in the present application will be introduced below.

FIG. 8 shows a schematic structural diagram of a communication device provided in the present application. The communication device 600 includes a communication unit 610 and a processing unit 620.

The communication unit 610 is configured to perform signal receiving and sending operations (receiving and/or sending) in the foregoing method embodiments, that is, to implement communication functions.

The processing unit 620 is configured to perform other operations other than signal transceiving (receiving and/or sending) in the foregoing method embodiment, for example: determining the activated TCI-state or TCI-state combination.

Optionally, the communication unit 610 is also called a transceiving unit (or module), and may include a receiving unit (module) and/or a sending unit (module), which are respectively used to perform the receiving and sending steps of the terminal device in the foregoing method embodiment. Optionally, the communication device 600 may further include a storage unit for storing instructions executed by the communication unit 610 and/or the processing unit 620.

For example, when the communication device 600 is a terminal device, it includes:

Receiving module; for receiving configuration information sent by a network device, the configuration information includes one or more transmission configuration indication state TCI-state combinations, each TCI-state combination includes one or more TCI-states; receiving the network device sent The media access control control unit MAC-CE of the MAC-CE is used to activate part or all of the TCI-state combination; receiving the downlink control information DCI sent by the network device;

Processing module: used to determine an activated TCI-state combination according to the value of the transmission configuration indication TCI field in the DCI; one or more TCI-states included in the one activated TCI-state combination.

The processing module is also used for:

It is determined according to the first bit in the MAC-CE that the object of the MAC-CE activation is a TCI-state combination; or according to the configuration information or a field in the received RRC message, it is determined that the MAC-CE is activated The object is the TCI-state combination;

The processing module is further configured to determine that the MAC-CE activated object is a TCI-state combination according to one or more of the following:

If the terminal device is configured with a TCI-state combination, determining that the MAC-CE activated object is the TCI-state combination;

In the measurement configuration information received by the terminal device, if the value of the parameter beam group report groupBasedBeamReporting is enable, it is determined that the MAC-CE activated object is the TCI-state combination; or

If the terminal device receives multi-beam transmission or multi-TRP transmission indication information, it is determined that the object of the MAC-CE activation is a TCI-state combination.

The processing module is further configured to determine the code division multiplexing CDM group of each demodulation reference signal DMRS port, DMRS port group or DMRS port according to one or more TCI-states included in the one activated TCI-state combination The corresponding TCI-state.

The processing module is also used for:

Determining an active TCI-state combination index according to the value of the TCI field in the DCI;

Determine the index of each TCI-state included in the one activated TCI-state combination according to the index of the TCI-state combination;

The TCI-state corresponding to each DMRS port, DMRS port group or CDM group of DMRS ports is determined according to the index of each TCI-state included in the one activated TCI-state combination.

The foregoing reference method embodiment lists part of the functions of each module of the terminal device, and other functions can refer to the related description of the method embodiment, which will not be repeated here.

The communication device 600 is a terminal device, and may also be a chip in the terminal device. When the communication device is a terminal device, the processing unit may be a processor, and the communication unit may be a transceiver. The communication device may further include a storage unit, and the storage unit may be a memory. The storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the communication device executes the foregoing method. When the communication device is a chip in a terminal device, the processing unit may be a processor, and the communication unit may be an input/output interface, pin or circuit, etc.; the processing unit executes the instructions stored in the storage unit to enable the communication The device executes the operations performed by the terminal device in the above method embodiments, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or a storage unit in the terminal device located outside the chip (For example, read only memory, random access memory, etc.). Those skilled in the art can clearly understand that the steps performed by the communication device 600 and the corresponding beneficial effects can refer to the related description of the terminal device in the foregoing method embodiment, and for the sake of brevity, details are not described herein again.

It should be understood that the communication unit 610 may be implemented by a transceiver, and the processing unit 620 may be implemented by a processor. The storage unit can be realized by a memory. As shown in FIG. 9, the communication device 700 may include a processor 710, a memory 720, and a transceiver 730.

The communication device 600 shown in FIG. 8 or the communication device 700 shown in FIG. 9 can implement the steps performed by the terminal device in the foregoing method embodiment. For similar descriptions, reference may be made to the description in the foregoing corresponding method. To avoid repetition, I won’t repeat them here.

FIG. 10 shows a schematic structural diagram of a communication device 800 provided in this application. The communication device 800 includes a processing unit 810 and a communication unit 820.

The processing unit 810 is configured to perform signal receiving and sending operations in the foregoing method embodiment, that is, to implement a communication function.

The communication unit 820 is configured to perform other operations except for signal transceiving in the foregoing method embodiment.

Optionally, the communication unit 820 may be called a transceiving unit (or module), including a receiving unit (module) and/or a sending unit (module), which are respectively used to perform the steps of receiving and sending by the network device in the foregoing method embodiment. Optionally, the communication device 800 may further include a storage unit for storing instructions executed by the communication unit 820 and the processing unit 810.

The communication device 800 is a network device in the method embodiment, and may also be a chip in the network device. When the device is a network device, the processing unit may be a processor, and the communication unit may be a transceiver. The device may also include a storage unit, which may be a memory. The storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the communication device executes the foregoing method. When the device is a chip in a network device, the processing unit may be a processor, and the communication unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes instructions stored in the storage unit to enable the communication The device executes the operations performed by the network device in the foregoing method embodiments. The storage unit may be a storage unit (for example, a register, cache, etc.) in the chip, or a storage unit located outside the chip in the communication device. (For example, read only memory, random access memory, etc.).

Those skilled in the art can clearly understand that the steps performed by the communication device 800 and the corresponding beneficial effects can be referred to the related description of the network device in the above method embodiment, and for the sake of brevity, details are not repeated here.

It should be understood that the communication unit 820 may be implemented by a transceiver, and the processing unit 810 may be implemented by a processor. The storage unit can be realized by a memory. As shown in FIG. 11, the communication device 900 may include a processor 910, a memory 920, and a transceiver 930.

The communication device 800 shown in FIG. 10 or the communication device 900 shown in FIG. 11 can implement the steps performed by the network device in the foregoing method embodiment. For similar descriptions, reference may be made to the description in the foregoing corresponding method. To avoid repetition, I won’t repeat them here.

The network equipment in the foregoing device embodiments corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps. For example, the communication unit (or transceiver unit, transceiver) method executes the steps of sending and/or receiving in the method embodiment (or performed by the sending unit and the receiving unit respectively), and other steps except the sending and receiving can be performed by the processing unit (processor )carried out. For the functions of specific units, refer to the corresponding method embodiments. The sending unit and the receiving unit may form a transceiver unit, and the transmitter and receiver may form a transceiver to jointly implement the transceiver function in the method embodiment; the processor may be one or more.

It should be understood that the division of each unit described above is only a functional division, and there may be other division methods in actual implementation.

The communication device in each of the foregoing embodiments may also be a chip or a functional unit in a terminal device or a network device, and the processing unit may be implemented by hardware or software. When implemented by hardware, the processing unit may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processing unit can be a general-purpose processor, which can be implemented by reading the software code stored in the storage unit. The storage unit can be integrated in the processor or can exist independently of the processor. .

It should be understood that the processing unit mentioned in the foregoing embodiment may be a chip. For example, the processing unit may be a Field-Programmable Gate Array (FPGA), a dedicated integrated chip (Application Specific Integrated Circuit, ASIC), a system chip (System on Chip, SoC), and a central processor (Central Processor). Unit, CPU), network processor (Network Processor, NP), digital signal processing circuit (Digital Signal Processor, DSP), microcontroller (Micro Controller Unit, MCU), programmable controller (Programmable Logic Device, PLD) or Other integrated chips, etc. When the aforementioned communication device is a chip in a network device or a terminal device, the function received by the communication unit (transceiver) is the meaning of acquisition or input, and the function sent is the meaning of output. E.g:

Receiving module: used to obtain configuration information sent by a network device, the configuration information includes one or more transmission configuration indication state TCI-state combinations, each TCI-state combination includes one or more TCI-states; to obtain the configuration information sent by the network device The media access control control unit MAC-CE of the MAC-CE is used to activate part or all of the TCI-state combination; obtain the downlink control information DCI sent by the network device;

FIG. 12 is a schematic structural diagram of a terminal device 1000 provided by this application. For ease of description, FIG. 12 only shows the main components of the terminal device. As shown in FIG. 12, the terminal device 1000 includes a processor, a memory, a control circuit, an antenna, and an input and output device. The terminal device 1000 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiment.

The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to control the terminal device to perform the actions described in the above method embodiment. The memory is mainly used to store software programs and data. The control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 12 only shows a memory and a processor. In actual terminal devices, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

As an optional implementation, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device and execute Software program, processing the data of the software program. The processor in FIG. 12 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as buses. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in the embodiment of FIG. 12, the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 1001 of the terminal device 1000, and the processor with the processing function can be regarded as the processing unit 1002 of the terminal device 1000. As shown in FIG. 12, the terminal device 1000 includes a transceiver unit 1001 and a processing unit 1002. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on. Optionally, the device for implementing the receiving function in the transceiver unit 1001 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1001 as the sending unit, that is, the transceiver unit 1001 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

The terminal device 1000 shown in FIG. 12 can implement various processes related to the terminal device in the method embodiment. The operation and/or function of each module in the terminal device 1000 is to implement the corresponding process in the foregoing method embodiment. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of this application, for example, it may be a schematic structural diagram of a network device. As shown in FIG. 13, the network device 1100 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment.

The network can be applied to the communication system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment. The network equipment 1100 may include one or more radio frequency units, such as a remote radio unit (RRU) 1110 and one or more baseband units (BBU) (also known as digital units (DU)). )) 1120. In addition, the function of the RRU can also be implemented by an AAU (active antenna unit, active antenna unit).

The RRU 1110 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1111 and a radio frequency unit 1112. The RRU 1110 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, for sending the indication information in the foregoing method embodiments. The RRU 1110 and the BBU 1120 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 1120 is the control center of the base station, and can also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 1120 may be used to control the network device to execute the operation flow of the network device in the foregoing method embodiment.

In one embodiment, the BBU 1120 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access indication (such as an NR network), or support different access standards. Wireless access network (such as LTE network, 5G network or other network). The BBU 1120 also includes a memory 1121 and a processor 1122, and the memory 1121 is used to store necessary instructions and data. The processor 1122 is used to control the base station to perform necessary actions, for example, to control the network device to execute the operation flow of the network device in the foregoing method embodiment. The memory 1121 and the processor 1122 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board. It should be understood that the network device 1100 shown in FIG. 13 can implement various processes involving the network device in the method embodiment. The operations and/or functions of each module in the network device 1100 are respectively set to implement the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

It should be noted that the communication unit in the embodiment of the present application may also be referred to as a transceiver unit or a transceiver module.

In the implementation process, each step in the method provided in this embodiment can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated crcuit, ASIC), a ready-made programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The processors in the embodiments of the present application may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It can be understood that the memory or storage unit in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

An embodiment of the present application also provides a communication system, which includes a sending end device and a receiving end device. For example, the sending end device is the network device in the foregoing embodiment, and the receiving end device is the terminal device in the foregoing embodiment; or, the sending end device is the terminal device in the foregoing embodiment, and the receiving end device is the network device in the foregoing embodiment.

The embodiments of the present application also provide a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer or a processor, the method in any of the foregoing embodiments is implemented.

The embodiments of the present application also provide a computer program product, which implements the method in any of the foregoing embodiments when the computer program product is executed by a computer or a processor.

The embodiment of the present application also provides a system chip, which includes a processing unit and a communication unit. The processing unit may be a processor, for example. The communication unit may be, for example, an input/output interface, a pin, or a circuit. The processing unit can execute computer instructions so that the chip in the communication device executes any of the methods provided in the foregoing embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

It should also be understood that the “saving” involved in the embodiments of the present application may refer to being stored in one or more memories. The one or more memories may be provided separately, or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partly provided separately, and partly integrated in the decoder, processor, or communication device. The type of the memory may be any form of storage medium, which is not limited in this application.

It should also be understood that the "protocol" in the embodiments of the present application may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which are not limited in this application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website, computer, server, or data center through a cable. (Such as coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (SSD)). ))Wait.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "in one embodiment" or "in an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

Claims

A method for indicating status of transmission configuration indication, characterized in that it comprises:

Receiving configuration information sent by a network device, where the configuration information includes one or more transmission configuration indication state TCI-state combinations, and each TCI-state combination includes one or more TCI-states;

Receiving a media access control control unit MAC-CE sent by a network device, where the MAC-CE is used to activate part or all of the TCI-state combination;

Receive the downlink control information DCI sent by the network device, and determine an activated TCI-state combination according to the value of the transmission configuration indication TCI field in the DCI; one or more TCI-states included in the one activated TCI-state combination.
The method according to claim 1, wherein each TCI-state combination includes an index of the TCI-state combination, and an index of one or more TCI-states included in the TCI-state combination .
The method according to claim 1 or 2, wherein:

The first bit in the MAC-CE is used to indicate that the object activated by the MAC-CE is a TCI-state combination; or

The configuration information or a field in the received radio resource control RRC message is used to indicate that the object of MAC-CE activation is a TCI-state combination.
The method according to claim 1 or 2, wherein at least one of the following is used to determine that the MAC-CE activated object is a TCI-state combination:

If the terminal device is configured with a TCI-state combination, determining that the MAC-CE activated object is the TCI-state combination;

In the measurement configuration information received by the terminal device, if the value of the parameter beam grouping report groupBasedBeamReporting is enable, it is determined that the MAC-CE activated object is the TCI-state combination; or

If the terminal device receives multi-beam transmission or multi-send-receive-point TRP transmission indication information, it is determined that the MAC-CE activated object is the TCI-state combination.
The method according to any one of claims 1-4, further comprising: determining each demodulation reference signal DMRS port according to one or more TCI-states included in the one activated TCI-state combination, TCI-state corresponding to the DMRS port group or the code division multiplexing CDM group of the DMRS port.
The method according to any one of claim 5, wherein the DMRS port and DMRS port group of each demodulation reference signal are determined according to one or more TCI-states included in the one activated TCI-state combination Or the TCI-state corresponding to the CDMA CDM group of the DMRS port, including:

Determining an active TCI-state combination index according to the value of the TCI field in the DCI;

Determine the index of each TCI-state included in the one activated TCI-state combination according to the index of the TCI-state combination;

The TCI-state corresponding to each DMRS port, DMRS port group or CDM group of DMRS ports is determined according to the index of each TCI-state included in the one activated TCI-state combination.
The method according to claim 5, wherein:

TCI-state corresponds to DMRS port, DMRS port group or CDM group of DMRS port according to the index from small to large or from large to small;

TCI-state corresponds to the DMRS port, DMRS port group, or CDM group of the DMRS port in the descending order of index in the descending order of index; or

The TCI-state corresponds to the DMRS port, the DMRS port group or the CDM group of the DMRS port in the descending order of the index in the descending order of the index.
The method according to any one of claims 1-7, wherein the configuration information further includes one or more transmission configuration indication states TCI-state;

A part of the bits of the MAC-CE is used to activate part or all of the TCI-state combination, and the other part of the bits is used to activate part or all of the TCI-state;

Among all the values of the TCI field, a part of the value corresponds to the TCI-state combination, and the other part of the value corresponds to the TCI-state.
A communication device, characterized by comprising:

Receiving module: used to receive configuration information sent by a network device, the configuration information includes one or more transmission configuration indication state TCI-state combinations, each TCI-state combination includes one or more TCI-states; receiving the network device sent The media access control control unit MAC-CE of the MAC-CE is used to activate part or all of the TCI-state combination; receiving the downlink control information DCI sent by the network device;

Processing module: used to determine an activated TCI-state combination according to the value of the transmission configuration indication TCI field in the DCI; one or more TCI-states included in the one activated TCI-state combination.
The device according to claim 9, wherein the processing module is further configured to:

Determine, according to the first bit in the MAC-CE, that the object activated by the MAC-CE is a TCI-state combination; or

According to the configuration information or a field in the received radio resource control RRC message, it is determined that the target of the MAC-CE activation is the TCI-state combination.
The device according to claim 9, wherein the processing module is further configured to determine that the MAC-CE activated object is a TCI-state combination according to one or more of the following:

If the terminal device is configured with a TCI-state combination, determining that the MAC-CE activated object is the TCI-state combination;

In the measurement configuration information received by the terminal device, if the value of the parameter beam grouping report groupBasedBeamReporting is enable, it is determined that the MAC-CE activated object is the TCI-state combination; or

If the terminal device receives multi-beam transmission or multi-send-receive-point TRP transmission indication information, it is determined that the MAC-CE activated object is the TCI-state combination.
The device according to any one of claims 9-11, wherein the processing module is further configured to: determine each demodulation according to one or more TCI-states included in the one activated TCI-state combination Reference signal DMRS port, DMRS port group, or TCI-state corresponding to the code division multiplexing CDM group of DMRS port.
The device according to any one of claims 9-12, wherein the processing module is further configured to:

Determining an active TCI-state combination index according to the value of the TCI field in the DCI;

Determine the index of each TCI-state included in the one activated TCI-state combination according to the index of the TCI-state combination;

The TCI-state corresponding to each DMRS port, DMRS port group or CDM group of DMRS ports is determined according to the index of each TCI-state included in the one activated TCI-state combination.
A communication device, characterized in that the device includes:

Memory, used to store computer programs;

The processor is configured to call and execute the computer program stored in the memory to implement the method according to any one of claims 1 to 8.
A computer storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is executed by a computer, the method according to any one of claims 1 to 8 is realized.