Tci state indication method and apparatus, and storage medium

Abstract

The application discloses a TCI state indication method and device and a storage medium, and relates to the field of mobile communication. The method comprises the following steps: a terminal receives first indication information sent by a network device, the first indication information is used for indicating n TCI states, the n TCI states comprise joint TCI states and / or uplink TCI states, n is a positive integer; the terminal receives second indication information sent by the network device, the second indication information is used for indicating transmission parameters of a PUSCH; and according to the second indication information, m TCI states are determined, the m TCI states are a subset of the n TCI states, and m is a positive integer which is not greater than n. The application realizes dynamic confirmation of TCI states of a PUSCH channel, and improves the transmission flexibility of the PUSCH based on the TCI states.

Description

Technical Field

[0001] This application relates to the field of mobile communications, and in particular to a TCI (Transmission Configuration Indication) status indication method, apparatus and storage medium. Background Technology

[0002] In NR (New Radio) systems, network devices and terminals can perform uplink or downlink transmissions based on beams.

[0003] Specifically, a network device can indicate a TCI state for downlink, in which the beam indicated by the TCI state is used for downlink transmission; if the network device indicates a TCI state for uplink, the beam indicated by the TCI state is used for uplink transmission; and if the network device indicates a combined TCI state, the beam indicated by the combined TCI state is used by the terminal for both uplink and downlink transmission.

[0004] However, the above scheme is only applicable to the case of a single transmission reception point (S-TRP). Summary of the Invention

[0005] This application provides a TCI status indication method, apparatus, and storage medium, realizing a dynamic determination method for the TCI status of the PUSCH channel, thereby improving the transmission flexibility of PUSCH based on TCI status. The technical solution is as follows:

[0006] According to a first aspect of this application, a TCI status indication method is provided, the method being executed by a terminal, the method comprising:

[0007] The system receives first indication information sent by a network device. The first indication information is used to indicate n TCI states, including joint TCI states and / or uplink TCI states, where n is a positive integer.

[0008] Receive the second indication information sent by the network device, the second indication information being used to indicate the transmission parameters of PUSCH (Physical Uplink Shared Channel);

[0009] Based on the second indication information, m TCI states are determined, where the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0010] According to a second aspect of this application, a TCI status indication method is provided, the method being performed by a network device, the method comprising:

[0011] Send a first indication message to the terminal. The first indication message is used to indicate n TCI states, including a joint TCI state and / or an uplink TCI state, where n is a positive integer.

[0012] Send a second indication message to the terminal, the second indication message being used to indicate the transmission parameters of PUSCH;

[0013] The second indication information is also used by the terminal to determine m TCI states, wherein the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0014] According to a third aspect of this application, a TCI status indication device is provided, the device comprising:

[0015] The receiving module is configured to receive first indication information sent by the network device. The first indication information is used to indicate n TCI states, the n TCI states including joint TCI states and / or uplink TCI states, where n is a positive integer.

[0016] The receiving module is further configured to receive second indication information sent by the network device, the second indication information being used to indicate the transmission parameters of PUSCH;

[0017] The processing module is used to determine m TCI states based on the second indication information, wherein the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0018] According to a fourth aspect of this application, a TCI status indication device is provided, the device comprising:

[0019] The sending module is used to send first indication information to the terminal. The first indication information is used to indicate n TCI states, the n TCI states include joint TCI states and / or uplink TCI states, where n is a positive integer.

[0020] The sending module is further configured to send second indication information to the terminal, the second indication information being used to indicate the transmission parameters of PUSCH;

[0021] The second indication information is also used by the terminal to determine m TCI states, wherein the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0022] According to a fifth aspect of this application, a terminal is provided, the terminal comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the TCI status indication method as described in the first or second aspect above.

[0023] According to a sixth aspect of this application, a network device is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the TCI status indication method as described in the first or second aspect above.

[0024] According to a seventh aspect of this application, a communication system is provided, the communication system comprising a terminal and a network device, the terminal being configured to implement the TCI status indication method as described in the first aspect, and the network device being configured to implement the TCI status indication method as described in the second aspect.

[0025] According to an eighth aspect of this application, a computer-readable storage medium is provided, wherein executable program code is stored in the storage medium, the executable program code being loaded and executed by a processor to implement the TCI status indication method as described in the first or second aspect above.

[0026] According to a ninth aspect of this application, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is running on a terminal or network device, are used to implement the TCI status indication method as described in the first or second aspect above.

[0027] According to a tenth aspect of this application, a computer program product is provided, which, when executed by a processor of a terminal or network device, is used to implement the TCI status indication method of the first or second aspect described above.

[0028] In the solution provided in this application embodiment, after receiving the first indication information for indicating multiple TCI states, the terminal then receives the second indication information for indicating the transmission parameters of PUSCH. Based on the transmission parameters of PUSCH, the TCI state for PUSCH transmission can be determined, realizing a dynamic determination method for the TCI state of the PUSCH channel and improving the transmission flexibility of PUSCH based on TCI state. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A block diagram of a communication system provided in an exemplary embodiment of this application is shown;

[0031] Figure 2 A flowchart of a TCI status indication method provided in an exemplary embodiment of this application is shown;

[0032] Figure 3 A block diagram of a TCI status indication device provided in an exemplary embodiment of this application is shown;

[0033] Figure 4 A block diagram of another TCI status indication device provided in an exemplary embodiment of this application is shown;

[0034] Figure 5 A schematic diagram of the structure of a communication device provided in an exemplary embodiment of this application is shown. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. Unless otherwise indicated, the same numerals in different drawings denote the same or similar elements in the following description relating to the drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0037] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, for example, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0039] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, data stored, data displayed, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0040] First, a brief introduction to several terms used in the embodiments of this application will be provided.

[0041] TCI state: Used to inform the terminal of the QCL (Quasi Co-Location) information or spatial Rx parameter used when receiving the PDCCH (Physical Downlink Control Channel) and / or the DMRS (Demodulation Reference Signal) of the PDCCH. The QCL information or spatial Rx parameter corresponds to the QCL information or spatial Rx parameter used when receiving the reference signal (Synchronization Signal Block, SSB) or Channel State Information Reference Signal (CSI-RS) sent by the base station. Alternatively, it is used to inform the terminal of the QCL information or spatial Rx parameter used when receiving the PDSCH (Physical Downlink Shared Channel) and / or the DMRS of the PDSCH. The QCL information or spatial Rx parameter corresponds to the QCL information or spatial Rx parameter used when receiving the reference signal (Synchronization Signal Block) or Channel State Information Reference Signal sent by the base station.

[0042] Alternatively, it may inform the terminal of the QCL information, spatial relationship information, or spatial filtering used when transmitting the PUCCH (Physical Uplink Control Channel) and / or the DMRS of that PUCCH, specifying which reference signal (e.g., SRS) or SSB or CSI-RS transmitted by the base station corresponds to when the QCL information, spatial relationship information, or spatial filtering is transmitted. Or it may be used to inform the terminal of the QCL information, spatial relationship information, or spatial filtering used when transmitting the PUSCH and / or the DMRS of that PUSCH, specifying which reference signal (e.g., SRS) or SSB or CSI-RS transmitted by the base station corresponds to when the QCL information, spatial relationship information, or spatial filtering is transmitted.

[0043] Unified TCI state: If a base station indicates a unified TCI state for downlink, this TCI state can apply to the terminal's PDSCH and PDCCH, as well as some downlink reference signals. If a base station indicates a unified TCI state for uplink, this TCI state can apply to the terminal's PUSCH and PUCCH, as well as some uplink reference signals. Currently, the unified TCI state may be indicated separately as a separate uplink TCI state and a separate downlink TCI state, or jointly as a joint uplink and downlink TCI state.

[0044] Specifically, the separate uplink TCI state applies to the uplink channel and / or signal, the separate downlink TCI state applies to the downlink channel and / or signal, and the combined TCI state applies to both the uplink channel and / or signal and the downlink channel and / or signal.

[0045] The application scenarios of this application will be described below:

[0046] Figure 1 A block diagram of a communication system provided in an exemplary embodiment of this application is shown. The communication system may include a terminal 10 and a network device 20.

[0047] The number of terminals 10 is typically multiple, and one or more terminals 10 can be distributed within the cell managed by each network device 20. Terminals 10 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile station (MS), etc. For ease of description, in this embodiment, the devices mentioned above are collectively referred to as terminals.

[0048] Network device 20 is a device deployed in an access network to provide wireless communication functionality to terminal 10. For ease of description, in this embodiment, the device providing wireless communication functionality to terminal 10 is collectively referred to as a network device. Network device 20 and terminal 10 can establish a connection via an air interface, thereby communicating through this connection, including signaling and data exchange. There can be multiple network devices 20, and two adjacent network devices 20 can communicate via wired or wireless means. Terminal 10 can switch between different network devices 20, that is, establish connections with different network devices 20.

[0049] The network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems employing different wireless access technologies, the name of the device with network equipment functions may differ; for example, in a 5G NR (New Radio) system, it is called gNodeB or gNB. As communication technologies evolve, the name "network device" may change.

[0050] Optionally, at least two TRPs are configured on network device 20; or at least two network devices 20, each with at least one TRP, i.e., at least two network devices 20 have at least two TRPs. That is, the at least two TRPs can originate from the same cell or different cells. The terminal device 10 establishes a communication connection with the at least two TRPs through downlink TCI states and / or uplink TCI states. Optionally, different TRPs use different downlink TCI states and / or uplink TCI states. For example, the terminal device 10 determines the downlink TCI state required for receiving PDCCH and / or its DMRS based on the combined TCI state or the downlink TCI state; the terminal device 10 determines the uplink TCI state required for sending PUSCH and / or its DMRS based on the combined TCI state or the uplink TCI state.

[0051] The "5G NR system" in this application embodiment can also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in this application embodiment can be applied to 5G NR systems, as well as subsequent evolution systems of 5G NR systems.

[0052] In new radio (NR) technologies, especially in frequency range 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels.

[0053] Figure 2 The flowchart illustrates a TCI status indication method provided in an exemplary embodiment of this application, which can be applied, for example, to... Figure 1 In the terminal and network device shown, the method includes at least some of the following:

[0054] Step 201: The network device sends a first indication message to the terminal. The first indication message is used to indicate n TCI states, including the joint TCI state and / or the uplink TCI state, where n is a positive integer.

[0055] Step 202: The terminal receives the first instruction information sent by the network device.

[0056] The first indication information is used to indicate n TCI states, which include joint TCI states and / or uplink TCI states, where n is an integer greater than 1. That is, the first indication information is used to indicate information about multiple joint / uplink TCI states. Specifically, the first indication information is used to indicate the unified TCI state of the uplink channel and / or signal. Each of the n TCI states can be either a joint TCI state or an uplink TCI state.

[0057] In this embodiment of the application, the network device sends a first indication information to the terminal, indicating n TCI states through the first indication information. After receiving the first indication information sent by the network device, the terminal can determine the n TCI states configured by the network device for the terminal.

[0058] Step 203: The network device sends a second indication information to the terminal. The second indication information is used to indicate the transmission parameters of PUSCH. The second indication information is also used by the terminal to determine m TCI states, where the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0059] Step 204: The terminal receives the second indication information sent by the network device. The second indication information is used to indicate the transmission parameters of PUSCH.

[0060] In this embodiment of the application, the network device sends a second indication information to the terminal, and the second indication information is used to indicate the transmission parameters of PUSCH. After receiving the second indication information, the terminal can determine the transmission parameters of PUSCH based on the second indication information.

[0061] It should be noted that the first instruction information and the second instruction information here may be sent at the same time, either the first instruction information comes first, or the second instruction information comes first, or both at the same time. This application does not impose any restrictions.

[0062] Step 205: The terminal determines m TCI states according to the second instruction information, and the m TCI states are a subset of the n TCI states, where m is a positive integer not greater than n.

[0063] In this embodiment of the application, the terminal receives second indication information, and then determines m TCI states belonging to n TCI states based on the second indication information. Subsequently, the terminal can use the determined m TCI states when sending PUSCH.

[0064] Specifically, the terminal determines the transmission parameters of the PUSCH indicated by the second indication information, and then determines m TCI states from n TCI states based on the transmission parameters of the PUSCH indicated by the second indication information.

[0065] Where m is a positive integer not greater than n. That is, m TCI states are the same as n TCI states, or m TCI states are a proper subset of n TCI states; that is, m TCI states are all or part of n TCI states. Each TCI state in m TCI states can be a joint TCI state or an uplink TCI state.

[0066] In some embodiments, the PUSCH is a type 1CG PUSCH. That is, the m TCI states determined according to the second indication information in this application are used for the transmission of the type 1CG PUSCH.

[0067] In the solution provided in this application embodiment, after receiving the first indication information for indicating multiple TCI states, the terminal then receives the second indication information for indicating the transmission parameters of PUSCH. Based on the transmission parameters of PUSCH, the TCI state for PUSCH transmission can be determined, realizing a dynamic determination method for the TCI state of the PUSCH channel and improving the transmission flexibility of PUSCH based on TCI state.

[0068] exist Figure 2 The illustrated embodiment explains how the second indication information is used to indicate the transmission parameters of the PUSCH. Specifically, the transmission parameters of the PUSCH include at least one of the following:

[0069] (1) Path loss reference identifier.

[0070] (2) SRS (Sounding Reference Signal) resource indication.

[0071] (3) Precoding and layer information.

[0072] (4) SRS resource set.

[0073] (5) Power control parameter set.

[0074] exist Figure 2 Based on the illustrated embodiment, there are multiple schemes for the terminal to determine m TCI states according to the transmission parameters of PUSCH indicated by the second indication information. Each scheme is described below.

[0075] In some embodiments, if the specified transmission parameters of PUSCH include a parameter field, the m TCI states include the first TCI state among the n TCI states, or include the TCI state corresponding to the first SRS resource set in multiple SRS resource sets.

[0076] In this embodiment, the terminal determines one of the n TCI states from the m TCI states based on the number of parameter fields included in the specified transmission parameters of the PUSCH. This TCI state is either the first TCI state among the n TCI states, or it includes the TCI state corresponding to the first SRS resource set among multiple SRS resource sets. In other words, if the specified transmission parameters of the PUSCH indicated by the second indication information include one parameter field, it is determined that the m TCI states include one TCI state, and this one TCI state is one of the n TCI states. In this case, the value of m is 1.

[0077] In this embodiment of the application, the terminal determines n TCI states according to the first indication information. If the specified transmission parameters of PUSCH include a parameter field, the first TCI state among the n TCI states can be determined as m TCI states.

[0078] Alternatively, if the network device also configures multiple SRS resource sets for the terminal, the terminal can determine the TCI state corresponding to the first SRS resource set from n TCI states based on the first SRS resource set among the multiple SRS resource sets.

[0079] Optionally, the parameter fields included in the specified transmission parameters of PUSCH actually correspond to TRPs, so the number of parameter fields included in the specified transmission parameters of PUSCH corresponds to the number of TPRs.

[0080] In this embodiment of the application, the specified transmission parameters of PUSCH include a parameter field, which corresponds to a TRP, and in this case, it is an S-TRP transmission.

[0081] Optionally, if the specified transmission parameter of the PUSCH is a path loss reference identifier, and this path loss reference identifier includes only one parameter field (i.e., contains only one path loss reference identifier), it determines that among the m TCI states, it includes the first TCI state among the n TCI states, or it includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. Alternatively, if the specified transmission parameter of the PUSCH is an SRS resource indication, and this SRS resource indication includes only one parameter field (i.e., contains only one SRS resource indication), it determines that among the m TCI states, it includes the first TCI state among the n TCI states, or it includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. Alternatively, if the specified transmission parameter of the PUSCH is precoding and layer information, and this precoding and layer information includes only one parameter field (i.e., contains only one precoding and layer information), it determines that among the m TCI states, it includes the first TCI state among the n TCI states, or it includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. Alternatively, if the specified transmission parameter of PUSCH is an SRS resource set, and this SRS resource set includes a parameter field (i.e., contains only one SRS resource set), it determines that among m TCI states, it includes the first TCI state among n TCI states, or includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. Alternatively, if the specified transmission parameter of PUSCH is a power control parameter set, and this power control parameter set includes a parameter field (i.e., contains only one power control parameter set), it determines that among m TCI states, it includes the first TCI state among n TCI states, or includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. The power control parameter set includes 'p0-PUSCH-Alpha' and / or 'powerControlLoopToUse'. That is, if the specified transmission parameter of PUSCH is 'p0-PUSCH-Alpha', and 'p0-PUSCH-Alpha' includes only one parameter field (i.e., only one 'p0-PUSCH-Alpha'), it determines that among m TCI states, it includes the first TCI state among n TCI states, or it includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets. Alternatively, if the specified transmission parameter of PUSCH is 'powerControlLoopToUse', and 'powerControlLoopToUse' includes only one parameter field (i.e., only one 'powerControlLoopToUse'), it determines that among m TCI states, it includes the first TCI state among n TCI states, or it includes the TCI state corresponding to the first SRS resource set in multiple SRS resource sets.

[0082] For example, taking n=2 as an example, the terminal determines that the first SRS resource set corresponds to the first TCI state among n TCI states. Alternatively, the terminal determines that the first SRS resource set corresponds to the second TCI state among n TCI states.

[0083] In other embodiments, if the specified transmission parameters of PUSCH include x parameter fields, and m TCI states include x TCI states out of n TCI states, then x is a positive integer greater than 1.

[0084] In this embodiment, the terminal determines x TCI states out of n TCI states based on the number of parameter fields included in the specified transmission parameters of the PUSCH. That is, if the specified transmission parameters of the PUSCH indicated by the second indication information include x parameter fields, the terminal determines that the m TCI states include x TCI states, and these x TCI states are x TCI states out of the n TCI states. In this case, the value of m is x.

[0085] Optionally, the parameter fields included in the specified transmission parameters of PUSCH actually correspond to TRPs, so the number of parameter fields included in the specified transmission parameters of PUSCH corresponds to the number of TPRs.

[0086] In this embodiment of the application, the specified transmission parameters of PUSCH include x parameter fields, which correspond to x TRPs. Since x is a positive integer greater than 1, it corresponds to multiple TRPs, which is Multi-TRP transmission.

[0087] Optionally, x TCI states are the TCI states corresponding to x SRS resource sets respectively.

[0088] In this embodiment of the application, the network device also configures multiple SRS resource sets for the terminal, so that the terminal can determine the TCI state corresponding to x SRS resource sets from n TCI states based on the multiple SRS resource sets.

[0089] Optionally, if the specified transmission parameter of PUSCH is a path loss reference identifier, which includes x parameter fields (i.e., x path loss reference identifiers), then x TCI states are determined from among m TCI states, including x TCI states from among n TCI states. Alternatively, if the specified transmission parameter of PUSCH is an SRS resource indicator, which includes x parameter fields (i.e., x SRS resource indicators), then x TCI states are determined from among m TCI states, including x TCI states from among n TCI states. Alternatively, if the specified transmission parameter of PUSCH is precoding and layer information, which includes x parameter fields (i.e., x precoding and layer information), then x TCI states are determined from among m TCI states, including x TCI states from among n TCI states. Alternatively, if the specified transmission parameter of PUSCH is an SRS resource set, which includes x parameter fields (i.e., x SRS resource sets), then x TCI states are determined from among m TCI states, including x TCI states from among n TCI states. Alternatively, if the specified transmission parameter of PUSCH is a power control parameter set, which includes x parameter fields (i.e., x power control parameter sets), then x TCI states are determined out of n TCI states. The power control parameter set includes 'p0-PUSCH-Alpha' and / or 'powerControlLoopToUse'. That is, if the specified transmission parameter of PUSCH is 'p0-PUSCH-Alpha', which includes x parameter fields (i.e., x 'p0-PUSCH-Alpha' values), then x TCI states are determined out of n TCI states. Or, if the specified transmission parameter of PUSCH is 'powerControlLoopToUse', which includes x parameter fields (i.e., x 'powerControlLoopToUse' values), then x TCI states are determined out of n TCI states.

[0090] For example, taking n=2 as an example, the terminal determines the TCI states corresponding to the two SRS resource sets as the first TCI state and the second TCI state, respectively.

[0091] In some embodiments of this application, the terminal is configured with multiple SRS resource sets, and the terminal can then determine the corresponding TCI status based on the configured multiple SRS resource sets.

[0092] It should be noted that in this embodiment, the m TCI states are related to the initial PUSCH transmission. Specifically, the scheme by which the terminal determines the TCI states based on the transmission parameters of the second indication information applies to the initial transmission process; that is, the terminal uses the above scheme to determine the m TCI states during the initial PUSCH transmission. In some embodiments, the second indication information is an RRC (Radio Resource Control) message.

[0093] The following explains how the repeated resources of PUSCH during the initial transmission process use the determined m TCI states. In some embodiments, when the determined m TCI states include the first TCI state, that is, the K repeated resources corresponding to PUSCH use the first TCI state, that is, all K consecutive time domain units (time slots or each repeated unit) use the first TCI state; where K is a positive integer.

[0094] If it is determined that m TCI states include the second TCI state, that is, the K repeating resources corresponding to PUSCH use the second TCI state, that is, all K consecutive time domain units (time slots or each repeating unit) use the second TCI state.

[0095] Given m TCI states, including the first and second TCI states, determine the K duplicate resources corresponding to the PUSCH that use the first and second TCI states based on a mapping method, which can be either cyclic mapping or sequential mapping. The mapping relationships are as follows:

[0096] ●K=2: The first time-domain unit corresponds to the first TCI state, and the second time-domain unit corresponds to the second TCI state.

[0097] ●K>2 and a cyclic mapping method is used: the first TCI state corresponds to the first, third, fifth, etc., odd-numbered time domain units; the second TCI state corresponds to the second, fourth, sixth, etc., even-numbered time domain units.

[0098] ●K>2 and a sequential mapping method is used: the first TCI state corresponds to the 4i+1th and 4i+2nd time-domain units; the second TCI state corresponds to the 4i+3rd and 4i+4th time-domain units, where i is an integer greater than or equal to 0. For example, the first TCI state corresponds to the 1st and 2nd time-domain units, the second TCI state corresponds to the 3rd and 4th time-domain units; then, the first TCI state corresponds to the 5th and 6th time-domain units, the second TCI state corresponds to the 7th and 8th time-domain units, and so on.

[0099] It should be noted that this example uses K repeating resources as time-domain units, but it is not limited to time-domain units. Time-domain units can be replaced by frequency-domain units, or CDM groups corresponding to DMRS ports, etc. This application does not impose any restrictions on this.

[0100] In the solution provided in this application embodiment, the terminal determines the TCI state to be used based on the number of parameter fields included in the specified transmission parameters of the PUSCH, thereby realizing a dynamic determination method for the TCI state of the PUSCH channel and improving the flexibility of sending PUSCH based on the TCI state.

[0101] Figure 2 The illustrated embodiment explains how the terminal determines m TCI states based on the second indication information. These m TCI states are related to PUSCH retransmission; the following explains how to determine the m TCI states based on the second indication information.

[0102] In some embodiments, the second indication information includes an indication field, and the terminal determines, based on the value of the indication field, at least one of the m TCI states, including n TCI states.

[0103] In this embodiment of the application, the indication field included in the second indication information may have different values. When the indication field has different values, the terminal determines at least one TCI state from n TCI states as m TCI states.

[0104] Optionally, when the indicator field is a first value, the m TCI states are determined as the first TCI state among the n TCI states. When the indicator field is a second value, the m TCI states are determined as the first TCI state among the n TCI states. When the indicator field is a third value, the m TCI states are determined as both the first and second TCI states among the n TCI states. The first, second, and third values ​​are different values.

[0105] In some embodiments, the indication field includes at least one of the following:

[0106] SRS resource set indication;

[0107] TCI status indicator field.

[0108] In other words, the indication field of the second indication information includes SRS resource set indication, or includes TCI status indication field, or includes both SRS resource set indication and TCI status indication field.

[0109] Optionally, the second indication information is DCI (Downlink Control Information) information. For example, the DCI format of this DCI information is 0_1 or 0_2.

[0110] In some embodiments, the indication field of the second indication information is the SRS resource set indication, and the value of n is 2, that is, n TCI states including two TCI states is used as an example for explanation.

[0111] For example, if the SRS resource set indication is a first value, it is determined that the m TCI states include the first TCI state among the n TCI states; or, if the SRS resource set indication is a second value, it is determined that the m TCI states include the second TCI state among the n TCI states; or, if the SRS resource set indication is a third value, it is determined that the m TCI states include both the first and second TCI states among the n TCI states.

[0112] In some embodiments, when the SRS resource set indicator is a third value, the K duplicate resources corresponding to PUSCH are determined to use the first TCI state and the second TCI state based on a mapping method, which is either cyclic mapping or sequential mapping. Here, K is a positive integer.

[0113] For example, taking time-domain repetition as an example, a possible TCI status indication method is illustrated. Since the SRS resource set indication field can use 2 bits, the SRS resource set indication can have four values: 0, 1, 2, and 3. The first value includes 0, the second value includes 1, and the third value includes 2 and / or 3. The four values ​​are explained below:

[0114] (1) When the SRS resource set indicator is 0, that is, the SRS resource set indicator is the first value, the K repeated resources corresponding to PUSCH use the first TCI state, that is, all K consecutive time domain units (time slots or each repeated unit) use the first TCI state.

[0115] (2) When the SRS resource set indicator is 1, that is, the SRS resource set indicator is the second value, the K repeated resources corresponding to PUSCH use the second TCI state, that is, all K consecutive time domain units (time slots or each repeated unit) use the second TCI state.

[0116] (3) When the SRS resource set indicator value is 2, i.e., the SRS resource set indicator is the third value, the K duplicate resources corresponding to PUSCH use the first TCI state and the second TCI state based on the mapping method, which is either cyclic mapping or sequential mapping. The mapping relationship is as follows:

[0117] ●K=2: The first time-domain unit corresponds to the first TCI state, and the second time-domain unit corresponds to the second TCI state.

[0118] ●K>2 and a cyclic mapping method is used: the first TCI state corresponds to the first, third, fifth, etc., odd-numbered time domain units; the second TCI state corresponds to the second, fourth, sixth, etc., even-numbered time domain units.

[0119] ●K>2 and a sequential mapping method is used: the first TCI state corresponds to the 4i+1th and 4i+2nd time-domain units; the second TCI state corresponds to the 4i+3rd and 4i+4th time-domain units, where i is an integer greater than or equal to 0. For example, the first TCI state corresponds to the 1st and 2nd time-domain units, the second TCI state corresponds to the 3rd and 4th time-domain units; then, the first TCI state corresponds to the 5th and 6th time-domain units, the second TCI state corresponds to the 7th and 8th time-domain units, and so on.

[0120] (4) When the SRS resource set indicator is 3, i.e., the SRS resource set indicator is the third value, the K duplicate resources corresponding to PUSCH use the first TCI state and the second TCI state based on the mapping method, which is either cyclic mapping or sequential mapping. The mapping relationship is as follows:

[0121] ●K=2: The first time-domain unit corresponds to the second TCI state, and the second time-domain unit corresponds to the first TCI state.

[0122] ●K>2 and a cyclic mapping method is used: the first TCI state corresponds to the second, fourth, sixth, and other even-numbered time domain units; the second TCI state corresponds to the first, third, fifth, and other odd-numbered time domain units.

[0123] ●K>2 and a sequential mapping method is used: the second TCI state corresponds to the 4i+1th and 4i+2nd time-domain units; the first TCI state corresponds to the 4i+3rd and 4i+4th time-domain units, where i is an integer greater than or equal to 0. For example, the second TCI state corresponds to the 1st and 2nd time-domain units, and the first TCI state corresponds to the 3rd and 4th time-domain units; then, the second TCI state corresponds to the 5th and 6th time-domain units, and the first TCI state corresponds to the 7th and 8th time-domain units, and so on.

[0124] It should be noted that this example uses K repeating resources as time-domain units, but it is not limited to time-domain units. Time-domain units can be replaced by frequency-domain units, or CDM groups corresponding to DMRS ports, etc. This application does not impose any restrictions on this.

[0125] It should be noted that in traditional methods, the uplink DCI with DCI format 0_1 ​​or 0_2 does not have a TCI status indication field. In order to indicate the m TCI states used during PUSCH transmission, in some embodiments, a TCI status indication field can be added to the uplink DCI with DCI format 0_1 ​​or 0_2 to indicate the second indication information.

[0126] exist Figure 2 Based on the illustrated embodiment, the PUSCH is configured with any of the following:

[0127] Transmission methods based on Time Division Multiplexing (TDM);

[0128] Frequency Division Multiplexing (FDM) based transmission method;

[0129] At least two code division multiplexing (CDM) groups' demodulation reference signal DNRS ports;

[0130] Transmission methods based on Single-Frequency Network (SFN).

[0131] Optionally, the FDM-based transmission method refers to n PUSCH occasions (PUSCHoccasions) used for PUSCH transmission having different frequency domain resources and different TCI states for the n PUSCH occasions. The FDM-based method includes: FDM method A; or, FDM method B. FDM method A refers to, when the terminal is indicated with multiple TCI states, the terminal transmits PUSCH on a single PUSCH occasion using different TCI states on non-overlapping frequency domain resources. FDM method B refers to, when the terminal is indicated with multiple TCI states, the terminal transmits PUSCH on multiple PUSCH occasions using different TCI states on non-overlapping frequency domain resources; in an exemplary case of FDM method B, the number of TCI states and PUSCH occasions are both two.

[0132] Optionally, a TDM-based transmission method refers to n PUSCH occasions used for transmission having different time-domain resources and different TCI states. TDM-based transmission methods include: repetition type A; or repetition type B. In repetition type A, different time-domain units occupy the same symbol position in different time slots; in repetition type B, one time slot can contain two time-domain units, and one time-domain unit can also occupy at least a portion of the symbols in two time slots.

[0133] Optionally, the DMRS port used for transmitting PUSCH corresponds to at least two CDM groups, and the TCI states of the at least two CDM groups are different.

[0134] Optionally, the SFN-based transmission method includes SFN method A or SFN method B. In the SFN method, the TCI state used for PUSCH transmission includes at least two TCI states, each TCI state including a joint TCI state or an uplink TCI state. When PUSCH transmission is configured with the SFN-based transmission method, SFN can also dynamically switch to S-TRP transmission; that is, if the number of TCI states is greater than 1, it is SFN-based transmission; otherwise, it dynamically switches to S-TRP transmission. Optionally, the time-domain resources and frequency-domain resources used for PUSCH transmission are the same, and the DMRS port used for the demodulation reference signal of PUSCH transmission is the same.

[0135] In SFN method A, if at least two TCI states are indicated, the terminal assumes that the DMRS port used for transmitting PUSCH is quasi-co-located with the reference signal corresponding to the at least two TCI states; in SFN method B, if at least two TCI states are indicated, the terminal assumes that the DMRS port used for transmitting PUSCH is quasi-co-located with the reference signal corresponding to the at least two TCI states, except for the quasi-co-location parameters of the second TCI state: {Doppler shift, Doppler spread}.

[0136] exist Figure 2 Based on the illustrated embodiment, there are multiple ways in which the network device indicates n TCI states through the first indication information, and each method is described below.

[0137] In some embodiments, the first indication information is carried in a first Medium Access Control Element (MAC CE), which is used to indicate n TCI states.

[0138] Optionally, the first MAC CE is used to indicate n TCI states corresponding to a code point in the TCI field of the Downlink Control Information (DCI). That is, only the first MAC CE is sent but the DCI is not sent. The n TCI states indicated in the first MAC CE correspond to only one code point in the TCI field of the DCI. Therefore, the base station does not need to send an additional DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0139] In some embodiments, the first indication information is carried in a second MAC CE and a first DCI. The second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates one of the at least two code points. That is, the second MAC CE and the first DCI simultaneously indicate the first indication information. The second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates a code point. The n TCI states corresponding to that code point are then obtained by querying the second MAC CE. In this case, the second MAC CE can indicate multiple code point configurations, each with n TCI states. It should be noted that in the n TCI states corresponding to each code point, the value of n can be the same or different for each code point.

[0140] In some embodiments, the first indication information further includes identification information corresponding to each TCI state. The identification information is the control resource set pool index (CORESETPoolIndex), or the control resource set group ID (CORESET group ID), or the control resource set ID (CORESET ID), or the search space set group ID (SS setgroup ID), or the search space set ID (SS set ID), or the PDCCH group ID or the PUSCH group ID; or, each of the n TCI states has a default mapping relationship with any of the above identification information.

[0141] That is, in one case, each of the n TCI states has a default mapping relationship with the above identification information, and the first indication information does not need to further indicate the correspondence between the TCI states and the above identification information; in another case, there is no default mapping relationship between the TCI states and the identification information, so the first indication information also includes the correspondence between each TCI state and the identification information.

[0142] In some embodiments, the second indication information corresponds to at least one BandWidthPartIdentity (BWP ID) and / or at least one ComponentCarrierIdentity (CC ID).

[0143] Furthermore, when the CC ID is a CC ID in the CC list, the m TCI states apply to all BWPs on all CCs in the CC list; that is, the BWP ID can be ignored. Here, the CC list is a list configured for the network device.

[0144] In some embodiments, at least one BWP ID corresponding to m TCI states is the same as the BWP ID corresponding to n TCI states; or at least one CC ID corresponding to m TCI states is the same as the CC ID corresponding to n TCI states; or at least one BWP ID and CC ID corresponding to m TCI states are the same as the BWP ID and CC ID corresponding to n TCI states.

[0145] It should be noted that the above embodiments can be split into new embodiments, or combined with other embodiments to form new embodiments. This application does not limit the combination of embodiments.

[0146] Figure 3 A block diagram of a TCI status indication device provided in an exemplary embodiment of this application is shown. See also: Figure 3 The device includes:

[0147] The receiving module 301 is configured to receive first indication information sent by the network device. The first indication information is used to indicate n TCI states, including joint TCI states and / or uplink TCI states, where n is a positive integer.

[0148] The receiving module 301 is further configured to receive second indication information sent by the network device, the second indication information being used to indicate the transmission parameters of PUSCH;

[0149] The processing module 302 is used to determine m TCI states according to the second indication information, wherein the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0150] In some embodiments, the transmission parameters of the PUSCH include at least one of the following:

[0151] Path loss reference indicator;

[0152] SRS resource indication;

[0153] Precoding and layer information;

[0154] SRS resource set;

[0155] Power control parameter set.

[0156] In some embodiments, the specified transmission parameters of the PUSCH include a parameter field, and the m TCI states include the first TCI state among the n TCI states, or include the TCI state corresponding to the first SRS resource set among multiple SRS resource sets.

[0157] In some embodiments, the specified transmission parameters of the PUSCH include x parameter fields, and the m TCI states include x TCI states out of the n TCI states, where x is a positive integer greater than 1.

[0158] In some embodiments, the x TCI states are the TCI states corresponding to x SRS resource sets respectively.

[0159] In some embodiments, the m TCI states are related to the initial PUSCH transmission.

[0160] In some embodiments, the processing module 302 is further configured to determine, based on the value of the indication field, that the m TCI states include at least one TCI state among the n TCI states.

[0161] In some embodiments, the indication field includes at least one of the following:

[0162] SRS resource set indication;

[0163] TCI status indicator field.

[0164] In some embodiments, the m TCI states are associated with PUSCH retransmission.

[0165] In some embodiments, the PUSCH is configured with any of the following:

[0166] Transmission methods based on Time Division Multiplexing (TDM);

[0167] Transmission methods based on Frequency Division Multiplexing (FDM);

[0168] At least two demodulation reference signal (DMRS) ports for code division multiplexing (CDM) groups;

[0169] Transmission method based on single-frequency network (SFN).

[0170] In some embodiments, the first indication information is carried in a first Media Access Control Layer (MAC) CE, the first MAC CE being used to indicate the n TCI states; or,

[0171] The first indication information is carried in the second MAC CE and the first DCI. The second MAC CE is used to indicate the n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI is used to indicate one of the at least two code points.

[0172] In some embodiments, the first indication information includes identification information corresponding to each TCI state, wherein the identification information is a control resource set pool index, or a control resource set group identifier, or a control resource set identifier, or a search space set group identifier, or a search space set identifier, or a physical downlink control channel (PDCCH) group identifier or a PUSCH group identifier; or,

[0173] Each of the n TCI states has a default mapping relationship with the identification information.

[0174] In some embodiments, the second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CC ID).

[0175] In some embodiments, when the CC ID is a CC ID in the CC list, the m TCI states apply to all BWPs on all CCs in the CC list.

[0176] In some embodiments, at least one BWP ID corresponding to the m TCI states is the same as the BWP ID corresponding to the n TCI states; or

[0177] At least one CC ID corresponding to the m TCI states is the same as the CC ID corresponding to the n TCI states; or

[0178] At least one BWP ID and CC ID corresponding to the m TCI states are the same as the BWP ID and CC ID corresponding to the n TCI states.

[0179] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0180] Figure 4 A block diagram of another TCI status indication device provided in an exemplary embodiment of this application is shown. See also Figure 4 The device includes:

[0181] The sending module 401 is used to send first indication information to the terminal. The first indication information is used to indicate n TCI states, the n TCI states include joint TCI states and / or uplink TCI states, where n is a positive integer.

[0182] The sending module 401 is further configured to send second indication information to the terminal, the second indication information being used to indicate the transmission parameters of PUSCH;

[0183] The second indication information is also used by the terminal to determine m TCI states, wherein the m TCI states are a subset of the n TCI states, and m is a positive integer not greater than n.

[0184] In some embodiments, the transmission parameters of the PUSCH include at least one of the following:

[0185] Path loss reference indicator;

[0186] SRS resource indication;

[0187] Precoding and layer information;

[0188] SRS resource set;

[0189] Power control parameter set.

[0190] In some embodiments, the specified transmission parameters of the PUSCH include a parameter field, and the m TCI states include the first TCI state among the n TCI states, or include the TCI state corresponding to the first SRS resource set in multiple SRS resource sets.

[0191] In some embodiments, the specified transmission parameters of the PUSCH include x parameter fields, and the m TCI states include x TCI states out of the n TCI states, where x is a positive integer greater than 1.

[0192] In some embodiments, the x TCI states are the TCI states corresponding to x SRS resource sets respectively.

[0193] In some embodiments, the m TCI states are related to the initial PUSCH transmission.

[0194] In some embodiments, the second indication information includes an indication field, and the m TCI states include at least one TCI state among the n TCI states, wherein the at least one TCI state is determined based on the value of the indication field.

[0195] In some embodiments, the indication field includes at least one of the following:

[0196] SRS resource set indication;

[0197] TCI status indicator field.

[0198] In some embodiments, the m TCI states are associated with PUSCH retransmission.

[0199] In some embodiments, the PUSCH is configured with any of the following:

[0200] Transmission methods based on Time Division Multiplexing (TDM);

[0201] A transmission method based on Frequency Division Multiplexing (FDM);

[0202] At least two demodulation reference signal (DMRS) ports for code division multiplexing (CDM) groups;

[0203] Transmission method based on single-frequency network (SFN).

[0204] In some embodiments, the first indication information is carried in a first Media Access Control Layer (MAC) CE, the first MAC CE being used to indicate the n TCI states; or,

[0205] The first indication information is carried in the second MAC CE and the first DCI. The second MAC CE is used to indicate the n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI is used to indicate one of the at least two code points.

[0206] In some embodiments, the first indication information includes identification information corresponding to each TCI state, wherein the identification information is a control resource set pool index, or a control resource set group identifier, or a control resource set identifier, or a search space set group identifier, or a search space set identifier, or a physical downlink control channel (PDCCH) group identifier or a PUSCH group identifier; or,

[0207] The first indication information includes the n TCI states, and each of the n TCI states has a default mapping relationship with the identification information.

[0208] In some embodiments, the second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CC ID).

[0209] In some embodiments, when the CC ID is a CC ID in the CC list, the m TCI states apply to all BWPs on all CCs in the CC list.

[0210] In some embodiments, at least one BWP ID corresponding to the m TCI states is the same as the BWP ID corresponding to the n TCI states; or

[0211] At least one CC ID corresponding to the m TCI states is the same as the CC ID corresponding to the n TCI states; or

[0212] At least one BWP ID and CC ID corresponding to the m TCI states are the same as the BWP ID and CC ID corresponding to the n TCI states.

[0213] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0214] Figure 5 A schematic diagram of the structure of a communication device provided in an exemplary embodiment of this application is shown. The communication device includes: a processor 501, a receiver 502, a transmitter 503, a memory 504, and a bus 505.

[0215] The processor 501 includes one or more processing cores. The processor 501 executes various functional applications and information processing by running software programs and modules.

[0216] The receiver 502 and the transmitter 503 can be implemented as a communication component, which can be a communication chip.

[0217] The memory 504 is connected to the processor 501 via the bus 505.

[0218] The memory 504 can be used to store at least one program code, and the processor 501 is used to execute the at least one program code to implement the various steps in the above method embodiments.

[0219] Furthermore, the communication device can be a terminal or a network device. The memory 1104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic storage, flash memory, and programmable read-only memory (PROM).

[0220] In an exemplary embodiment, a communication system is also provided, which includes the aforementioned Figure 5The embodiments shown include a communication device as a terminal and a communication device as a network device.

[0221] In an exemplary embodiment, a computer-readable storage medium is also provided, wherein executable program code is stored in the storage medium, the executable program code being loaded and executed by a processor to implement the TCI status indication method executed by a communication device provided in the above-described method embodiments.

[0222] In an exemplary embodiment, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is run on a terminal or network device, are used to implement the TCI status indication method as provided in the various method embodiments.

[0223] In an exemplary embodiment, a computer program product is provided, which, when executed by a processor of a terminal or network device, is used to implement the TCI status indication method provided in the above-described method embodiments.

[0224] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0225] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A Transmission Configuration Indication (TCI) status indication method, characterized in that, The method is executed by a terminal, and the method includes: The system receives first indication information sent by a network device. This first indication information indicates n TCI states, including a joint TCI state and / or an uplink TCI state, where n is a positive integer. The first indication information is carried in a first Media Access Control (MAC) CE, which indicates the n TCI states. Alternatively, the first indication information is carried in a second MAC CE and a first DCI, where the second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates one of the at least two code points. The network device receives a second indication message, which is used to indicate the transmission parameters of the Physical Uplink Shared Channel (PUSCH). The second indication message includes an indication field. Based on the value of the indication field, m TCI states are determined, including at least one of the n TCI states. The m TCI states are a subset of the n TCI states. The m TCI states are related to PUSCH retransmission, and m is a positive integer not greater than n. The second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CC ID).

2. The method according to claim 1, characterized in that, The transmission parameters of the PUSCH include at least one of the following: Path loss reference indicator; Detection Reference Signal (SRS) Resource Indicator; Precoding and layer information; SRS resource set; Power control parameter set.

3. The method according to claim 2, characterized in that, The specified transmission parameters of the PUSCH include a parameter field, and the m TCI states include the first TCI state among the n TCI states, or include the TCI state corresponding to the first SRS resource set in multiple SRS resource sets.

4. The method according to claim 2, characterized in that, The specified transmission parameters of the PUSCH include x parameter fields, and the m TCI states include x TCI states out of the n TCI states, where x is a positive integer greater than 1.

5. The method according to claim 4, characterized in that, The x TCI states are the TCI states corresponding to the x SRS resource sets respectively.

6. The method according to any one of claims 1 to 5, characterized in that, The m TCI states are related to the initial PUSCH transmission.

7. The method according to claim 1, characterized in that, The indication field includes at least one of the following: SRS resource set indication; TCI status indicator field.

8. The method according to any one of claims 1 to 5, characterized in that, The PUSCH is configured with any of the following: Transmission methods based on Time Division Multiplexing (TDM); Transmission methods based on Frequency Division Multiplexing (FDM); At least two demodulation reference signal (DMRS) ports for code division multiplexing (CDM) groups; Transmission method based on single-frequency network (SFN).

9. The method according to claim 1, characterized in that, The first indication information includes identification information corresponding to each TCI state. The identification information is a control resource set pool index, or a control resource set group identifier, or a control resource set identifier, or a search space set group identifier, or a search space set identifier, or a physical downlink control channel (PDCCH) group identifier or a PUSCH group identifier; or... Each of the n TCI states has a default mapping relationship with the identification information.

10. The method according to any one of claims 1 to 5, characterized in that, At least one BWP ID corresponding to the m TCI states is the same as the BWP ID corresponding to the n TCI states; or, At least one CCID corresponding to the m TCI states is the same as the CC ID corresponding to the n TCI states; or, At least one BWPID and CC ID corresponding to the m TCI states are the same as the BWPID and CCID corresponding to the n TCI states.

11. A TCI status indication method, characterized in that, The method is performed by a network device, and the method includes: A first indication message is sent to the terminal. The first indication message indicates n TCI states, including a joint TCI state and / or an uplink TCI state, where n is a positive integer. The first indication message is carried in a first Media Access Control (MAC) CE, and the first MAC CE indicates the n TCI states. Alternatively, the first indication message is carried in a second MAC CE and a first DCI, where the second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates one of the at least two code points. Send a second indication message to the terminal, the second indication message being used to indicate the transmission parameters of PUSCH, the second indication message including an indication field; The value of the indication field is used to determine that the m TCI states include at least one of the n TCI states, the m TCI states are a subset of the n TCI states, the m TCI states are related to PUSCH retransmission, and m is a positive integer not greater than n. The second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CC ID).

12. The method according to claim 11, characterized in that, The transmission parameters of the PUSCH include at least one of the following: Path loss reference indicator; SRS resource indication; Precoding and layer information; SRS resource set; Power control parameter set.

13. The method according to claim 12, characterized in that, The specified transmission parameters of the PUSCH include a parameter field, and the m TCI states include the first TCI state among the n TCI states, or include the TCI state corresponding to the first SRS resource set in multiple SRS resource sets.

14. The method according to claim 12, characterized in that, The specified transmission parameters of the PUSCH include x parameter fields, and the m TCI states include x TCI states out of the n TCI states, where x is a positive integer greater than 1.

15. The method according to claim 14, characterized in that, The x TCI states are the TCI states corresponding to the x SRS resource sets respectively.

16. The method according to any one of claims 11 to 15, characterized in that, The m TCI states are related to the initial PUSCH transmission.

17. The method according to claim 11, characterized in that, The indication field includes at least one of the following: SRS resource set indication; TCI status indicator field.

18. The method according to any one of claims 11 to 15, characterized in that, The PUSCH is configured with any of the following: Transmission methods based on Time Division Multiplexing (TDM); Transmission methods based on Frequency Division Multiplexing (FDM); At least two demodulation reference signal (DMRS) ports for code division multiplexing (CDM) groups; Transmission method based on single-frequency network (SFN).

19. The method according to claim 11, characterized in that, The first indication information includes identification information corresponding to each TCI state. The identification information is a control resource set pool index, or a control resource set group identifier, or a control resource set identifier, or a search space set group identifier, or a search space set identifier, or a physical downlink control channel (PDCCH) group identifier or a PUSCH group identifier; or... The first indication information includes the n TCI states, and each of the n TCI states has a default mapping relationship with the identification information.

20. The method according to any one of claims 11 to 15, characterized in that, At least one BWP ID corresponding to the m TCI states is the same as the BWPID corresponding to the n TCI states; or At least one CCID corresponding to the m TCI states is the same as the CC ID corresponding to the n TCI states; or At least one BWPID and CCID corresponding to the m TCI states are the same as the BWPID and CC ID corresponding to the n TCI states.

21. A Transmission Configuration Indication (TCI) Status Indication Device, characterized in that, The device includes: A receiving module is configured to receive first indication information sent by a network device. The first indication information indicates n TCI states, including a joint TCI state and / or an uplink TCI state, where n is a positive integer. The first indication information is carried in a first Media Access Control (MAC) CE, which indicates the n TCI states. Alternatively, the first indication information is carried in a second MAC CE and a first DCI, where the second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates one of the at least two code points. The receiving module is further configured to receive second indication information sent by the network device, the second indication information being used to indicate the transmission parameters of PUSCH, the second indication information including an indication field; The processing module is used to determine, based on the value of the indication field, at least one of the m TCI states, including the n TCI states, where the m TCI states are a subset of the n TCI states and are related to PUSCH retransmission, and m is a positive integer not greater than n. The second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CCID).

22. A TCI status indication device, characterized in that, The device includes: A sending module is configured to send first indication information to a terminal. The first indication information indicates n TCI states, including a joint TCI state and / or an uplink TCI state, where n is a positive integer. The first indication information is carried in a first Media Access Control (MAC) CE, which indicates the n TCI states. Alternatively, the first indication information is carried in a second MAC CE and a first DCI, where the second MAC CE indicates n TCI states corresponding to at least two code points in the TCI field of the first DCI, and the first DCI indicates one of the at least two code points. The sending module is further configured to send second indication information to the terminal, the second indication information being used to indicate the transmission parameters of PUSCH, the second indication information including an indication field; The value of the indication field is used to determine that the m TCI states include at least one of the n TCI states, the m TCI states are a subset of the n TCI states, the m TCI states are related to PUSCH retransmission, and m is a positive integer not greater than n. The second indication information corresponds to at least one bandwidth portion identifier (BWP ID) and / or at least one component carrier identifier (CCID).

23. A terminal, characterized in that, The terminal includes: processor; A transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the TCI status indication method as described in any one of claims 1 to 10.

24. A network device, characterized in that, The network device includes: processor; A transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the TCI status indication method as described in any one of claims 11 to 20.

25. A communication system, characterized in that, The communication system includes a terminal and a network device, wherein the terminal is used to implement the TCI status indication method as described in any one of claims 1 to 10, and the network device is used to implement the TCI status indication method as described in any one of claims 11 to 20.

26. A computer-readable storage medium, characterized in that, The readable storage medium stores executable program code, which is loaded and executed by a processor to implement the TCI status indication method as described in any one of claims 1 to 20.

Images