Tci state determination method and apparatus, device, and storage medium

Abstract

The application discloses a TCI state determination method, device and equipment and a storage medium, and relates to the field of mobile communication. The method comprises the following steps: a terminal receives first downlink control information (DCI) sent by a network device, wherein the first DCI is used for indicating transmission resources of a physical shared channel; and at least one first TCI state corresponding to the physical shared channel is determined. The application provides a scheme for determining the transmission resources of the physical shared channel indicated by the DCI according to the DCI, and then determining the TCI state corresponding to the physical shared channel, so that the physical shared channel is transmitted based on the determined TCI state, and the flexibility of transmitting the physical shared channel is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile communication, and in particular to a TCI state determination method and device, equipment and a storage medium. BACKGROUND

[0002] In a mobile communication system, a network device and a terminal perform data transmission through a beam, and the indication of the beam is achieved by indicating the QCL (Quasi Co-Location) parameters corresponding to different channels through a TCI (Transmission Configuration Indication) state.

[0003] Currently, a unified TCI state is proposed, which includes separate indication of uplink transmission and downlink transmission, i.e., downlink TCI state and uplink TCI state, or joint indication of uplink and downlink, i.e., joint TCI state. That is, if the network device indicates a downlink TCI state for downlink transmission, the downlink TCI state can be used for the PDSCH (Physical Downlink Shared Channel) and PDCCH (Physical Downlink Control Channel) of the terminal, as well as a part of the CSI-RS (Channel State Information Reference Signal); if the network device indicates an uplink TCI state for uplink transmission, the uplink TCI state can be used for the PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel) of the terminal, as well as a part of the SRS (Sounding Reference Signal); and if the network device indicates a joint TCI state, the joint TCI state can be used for both uplink transmission and downlink transmission.

[0004] However, when the DCI (Downlink Control Information) does not contain a TCI indication field, how the network device indicates the TCI state corresponding to the physical shared channel scheduled by the DCI becomes a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a TCI state determination method, device, equipment and storage medium, which ensures transmission of a physical shared channel based on a determined TCI state and improves flexibility of the transmission of the physical shared channel. The technical solution is as follows:

[0006] According to a first aspect of the present application, a TCI state determination method is provided, which is performed by a terminal, and the method comprises:

[0007] receiving first downlink control information (DCI) sent by a network device, the first DCI being used to indicate transmission resources of a physical shared channel;

[0008] determining at least one first TCI state corresponding to the physical shared channel.

[0009] According to a second aspect of the present application, a TCI state determination method is provided, which is performed by a network device, and the method comprises:

[0010] sending first DCI to a terminal, the first DCI being used to indicate transmission resources of a physical shared channel, and the terminal being used to determine at least one first TCI state corresponding to the physical shared channel.

[0011] According to a third aspect of the present application, a TCI state determination device is provided, which comprises:

[0012] a receiving module, configured to receive first downlink control information (DCI) sent by a network device, the first DCI being used to indicate transmission resources of a physical shared channel;

[0013] a determining module, configured to determine at least one first TCI state corresponding to the physical shared channel.

[0014] According to a fourth aspect of the present application, a TCI state determination device is provided, which comprises:

[0015] a sending module, configured to send first DCI to a terminal, the first DCI being used to indicate transmission resources of a physical shared channel, and the terminal being used to determine at least one first TCI state corresponding to the physical shared channel.

[0016] According to a fifth aspect of the present application, a terminal is provided, which comprises a processor, a transceiver connected to the processor, a memory for storing executable instructions of the processor, and the processor is configured to load and execute the executable instructions to implement the TCI state determination method according to the above aspects.

[0017] According to a sixth aspect of the present application, a network device is provided, the network device comprising: a processor; a transceiver connected to the processor; 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 state determination method according to the above aspect.

[0018] According to a seventh aspect of the present application, a communication system is provided, the communication system comprising a terminal and a network device, the terminal being configured to implement the TCI state determination method according to the first aspect, and the network device being configured to implement the TCI state determination method according to the second aspect.

[0019] According to an eighth aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium storing executable program code, the executable program code being loaded and executed by a processor to implement the TCI state determination method according to the above aspect.

[0020] According to a ninth aspect of the present application, a chip is provided, the chip comprising programmable logic circuit and / or program instructions, when the chip is running on a terminal or a network device, the chip being configured to implement the TCI state determination method according to the above aspect.

[0021] According to a tenth aspect of the present application, a computer program product is provided, when the computer program product is executed by a processor of a terminal or a network device, the computer program product being configured to implement the TCI state determination method according to the above aspect.

[0022] The present application provides a scheme for determining the transmission resource of a physical shared channel indicated by DCI, and further determining the TCI state corresponding to the physical shared channel, ensuring the transmission of the physical shared channel based on the determined TCI state, and improving the flexibility of the transmission of the physical shared channel. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 A block diagram of a communication system provided by an exemplary embodiment of the present application is shown;

[0025] Figure 2 A block diagram of another communication system provided by an exemplary embodiment of the present application is shown;

[0026] Figure 3A flow chart of a method for determining a TCI state is shown according to an example embodiment of the present application.

[0027] Figure 4 A flow chart of a method for indicating a TCI state is shown according to an example embodiment of the present application.

[0028] Figure 5 A flow chart of a method for determining a TCI state is shown according to an example embodiment of the present application.

[0029] Figure 6 A flow chart of a method for determining a TCI state is shown according to an example embodiment of the present application.

[0030] Figure 7 A flow chart of a method for determining a TCI state is shown according to an example embodiment of the present application.

[0031] Figure 8 A block diagram of an apparatus for determining a TCI state is shown according to an example embodiment of the present application.

[0032] Figure 9 A block diagram of an apparatus for determining a TCI state is shown according to an example embodiment of the present application.

[0033] Figure 10 A structure diagram of a communication device is shown according to an example embodiment of the present application. DETAILED DESCRIPTION

[0034] For the purpose of clarity, technical solutions and advantages of the present application will be further described in detail below with reference to the accompanying drawings.

[0035] The example embodiments will be described in detail herein with reference to the accompanying drawings. The following description is presented for purposes of illustration and description, and is not intended to limit the application as claimed. The example embodiments described herein are illustrative of various aspects of the present application and are not meant to limit the scope of the application as claimed. Rather, the scope of the present application is to be determined only by the claims which are detailed below.

[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0037] It should be understood that, although the terms first, second, third, etc. can be adopted in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information without departing from the scope of the present application, and similarly, the second information can also be referred to as the first information. Depending on the context, for example, the word "if" used herein can be interpreted as "when" or "when" or "in response to determining".

[0038] 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 for analysis, stored data, displayed data, etc.) and signals involved in the present application are authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0039] Firstly, the terms involved in the present application are explained.

[0040] TCI state: the TCI state is used to indicate QCL parameters, that is, the terminal and network device in the present application will perform data transmission based on the QCL parameters indicated by the TCI state. Among them, QCL type D corresponds to at least one of Rx spatial parameter (spatial parameter), UL spatial filter (uplink spatial filter), spatial setting (spatial setting), spatial relation information (spatial relation information) and the like. QCL Type D is commonly known as beam. The TCI state is also used to indicate the path loss reference signal and / or power control parameter information related to the uplink channel / uplink signal.

[0041] Among them, if the communication frequency band is in frequency range 2 (frequency range 2), the high frequency channel attenuates quickly, so the beam-based data transmission mode is adopted.

[0042] Specifically, there are channels and / or reference signals between the network device and the terminal. The channel includes at least one of PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUSCH (Physical Uplink Shared Channel) or PUCCH (Physical Uplink Control Channel). The reference signal includes at least one of DMRS (Demodulation Reference signal), CSI-RS (Channel State Information Reference Signal), SRS (Sounding Reference Signal), PRS (Positioning Reference Signal) or TRS (Tracking Reference Signal). The CSI-RS includes at least one of a CSI-RS for channel state information measurement, a CSI-RS for beam measurement or a CSI-RS for path loss estimation. The SRS includes at least one of an SRS for codebook-based or non-codebook-based channel state information measurement, an SRS for beam measurement or an SRS for positioning measurement. The TCI state of the above-mentioned reference signal is independently indicated. The PDCCH and the PUCCH respectively activate the respective TCI state using the MAC CE. The PDSCH and the PUSCH respectively indicate the respective TCI state using the DCI signaling.

[0043] In addition, the present application proposes to indicate the TCI state of at least one channel and / or signal by a unified TCI state. The unified TCI state currently includes separate indication of uplink transmission and downlink transmission, i.e. including downlink TCI state and uplink TCI state, or joint indication of uplink transmission and downlink transmission, i.e. joint TCI state. That is, if the network device indicates a downlink TCI state for downlink transmission, the downlink TCI state can be used for PDSCH and PDCCH of the terminal, and part of CSI-RS; if the network device indicates an uplink TCI state for uplink transmission, the uplink TCI state can be used for PUSCH and PUCCH of the terminal, and part of SRS. If the network device indicates a joint TCI state, the joint TCI state can be used for uplink transmission and downlink transmission at the same time.

[0044] If the network device indicates multiple TCI states, each TCI state can be a joint TCI state, a DL TCI state or a UL TCI state. Then, it is also necessary to indicate which one or more of the multiple TCI states is / are used by each physical shared channel, such as PDSCH, and which one or more of the multiple TCI states is / are used by each physical shared channel, such as PUSCH. In some embodiments, it is proposed to use DCI to indicate the TCI state used by the physical shared channel, wherein the TCI state used by the physical channel can be indicated by using the existing indication field in the DCI or introducing a new indication field.

[0045] Optionally, the DCI includes downlink DCI, the downlink DCI includes DCI format 1_1 or DCI format 1_2, and the TCI state used by PDSCH can be indicated by using the existing indication field in the downlink DCI or introducing a new indication field.

[0046] Optionally, the DCI further includes uplink DCI, the uplink DCI includes DCI format 0_1 or DCI format 0_2, and the TCI state used by PUSCH can be indicated by using the existing indication field in the uplink DCI or introducing a new indication field.

[0047] Optionally, the DCI further comprises a DCI format 1_0 and a DCI format 0_0, the DCI format 1_0 is a downlink DCI, which can be used to schedule a PDSCH, and the DCI format 0_0 is an uplink DCI, which can be used to schedule a PUSCH, since the DCI format 1_0 and the DCI format 0_0 are fallback DCIs, the existing indication field in the DCI format 1_0 and the DCI format 0_0 cannot be used or a new indication field cannot be introduced to indicate the TCI state used by the PDSCH or the PUSCH, therefore, the application provides a method for determining a TCI state for transmission of a physical shared channel scheduled by the DCI.

[0048] Secondly, the application scenario of the application is described:

[0049] Figure 1 A block diagram of a communication system is shown, which can include a terminal 10 and a network device 20.

[0050] The number of terminals 10 is usually multiple, and one or more terminals 10 can be distributed in a cell managed by each network device 20. The terminal 10 can include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication functions, and various forms of user equipment (User Equipment, UE), mobile stations (Mobile Station, MS), etc. For convenience of description, the above-mentioned devices are collectively referred to as terminals in the embodiments of the application.

[0051] The network device 20 is a device deployed in an access network to provide wireless communication functions for the terminal 10. For convenience of description, the above-mentioned device providing wireless communication functions for the terminal 10 is collectively referred to as a network device in the embodiments of the application. The network device 20 and the terminal 10 can establish a connection through an air interface, so as to communicate through the connection, including interaction of signaling and data. The number of network devices 20 can be multiple, and two adjacent network devices 20 can also communicate through wired or wireless means. The terminal 10 can perform beam reporting transmission between different network devices 20, that is, establish a connection with different network devices 20.

[0052] The network device 20 can include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different wireless access technologies, the names of devices with network device functions can be different, for example, in a 5G NR (New Radio) system, it is called gNodeB or gNB. As communication technology evolves, the name of the "network device" may change.

[0053] Optionally, the network device 20 is provided with at least two TRPs (Transmission Reception Points); or at least two network devices 20, each of which is provided with at least one TRP, that is, at least two network devices 20 are provided with at least two TRPs. That is, the at least two TRPs can come from the same cell or different cells.

[0054] In some embodiments, referring to Figure 2 , the network device 20 is provided with 4 TRPs, and the terminal 10 can be served by the 4 TRPs, and the terminal 10 can perform data transmission based on the 4 TRPs.

[0055] Wherein, when the network device 20 and the terminal 10 perform data transmission through multiple TRPs, it is called M-TRP transmission, and when the network device 20 and the terminal 10 perform data transmission through a single TRP, it is called S-TRP transmission.

[0056] In the case of M-TRP, if multiple sets of TCI states are indicated by TCI state indication information, dynamic switching of M-TRP and S-TRP of PDSCH or PUSCH still needs to be implemented, so a new indication field is introduced in the DCI to indicate that the TCI state used by the PDSCH is one or more TCI states indicated by the TCI field.

[0057] The "5G NR system" in the embodiments of the present application can also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning. The technical solutions described in the embodiments of the present application can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system.

[0058] Figure 3 A flowchart of a TCI state determination method provided by an example embodiment of the present application is shown, which can be applied to, for example, Figure 1 The method includes at least part of the following contents:

[0059] Step 301: The network device sends a first DCI to the terminal, and the first DCI is used to indicate the transmission resource of the physical shared channel.

[0060] Step 302: The terminal receives the first DCI sent by the network device, and the first DCI is used to indicate the transmission resource of the physical shared channel.

[0061] The first DCI is used to indicate the transmission resource of the physical shared channel, that is, the first DCI is used to schedule the physical shared channel, so that the network device and the terminal can perform data transmission based on the physical shared channel. The transmission resource refers to the resource occupied by the network device and the terminal when transmitting data through the physical shared channel.

[0062] In some embodiments, the transmission resource includes at least one of a time domain resource, a frequency domain resource, and other resources, which are not limited in the embodiments of the present application.

[0063] In some embodiments, the physical shared channel includes at least one of a PDSCH and a PUSCH.

[0064] For the first DCI used to indicate the physical shared channel, the physical shared channel is different, and the first DCI is also different.

[0065] Optionally, if the physical shared channel is a PDSCH, the first DCI is a DCI format 1_0, and if the physical shared channel is a PUSCH, the first DCI is a DCI format 0_0.

[0066] Step 303: The terminal determines at least one first TCI state corresponding to the physical shared channel.

[0067] In the embodiments of the present application, the terminal determines the transmission resource of the physical shared channel indicated by the first DCI, and then determines at least one first TCI state corresponding to the physical shared channel, so as to facilitate the terminal and the network device to perform data transmission based on the determined at least one first TCI state.

[0068] It should be noted that the embodiments of the present application are described based on the terminal determining at least one first TCI state corresponding to the physical shared channel. The first DCI used to indicate the transmission resource of the physical shared channel does not indicate the at least one first TCI state, that is, the function of the first DCI is only used to indicate the transmission resource, and is not used to indicate the TCI state.

[0069] It should be noted that the steps performed by the terminal in the embodiments of the present application can form a new embodiment alone, and the steps performed by the network device can form a new embodiment alone, which are not limited in the embodiments of the present application.

[0070] The application provides a scheme for determining a transmission resource of a physical shared channel indicated by DCI according to the DCI, and then determining a TCI state corresponding to the physical shared channel, ensuring transmission of the physical shared channel based on the determined TCI state, and improving the flexibility of transmission of the physical shared channel.

[0071] Figure 3 The embodiment shown illustrates the terminal determining the first TCI state. The following describes how the terminal determines the first TCI state according to the control resource set.

[0072] In some embodiments, the control resource set corresponds to a TCI state, and the terminal determines at least one first TCI state based on the TCI state corresponding to the control resource set.

[0073] In the embodiments of the application, the control resource set has a corresponding relationship with the TCI state, and the terminal can determine the TCI state corresponding to the control resource set based on the control resource set, and then determine at least one first TCI state from the TCI state corresponding to the control resource set.

[0074] In some embodiments, the control resource set includes control resource sets with different purposes. For example, the control resource set is a control resource set for transmitting the first DCI, or the control resource set is CORESET#0.

[0075] That is, the terminal can determine at least one first TCI state according to the TCI state corresponding to the control resource set for transmitting the first DCI. Alternatively, the terminal can also determine a first TCI state indicated according to the TCI state corresponding to CORESET#0.

[0076] It should be noted that CORESET#0 in the embodiments of the application can also be a CORESET for transmitting the first DCI, or CORESET#0 can not be a CORESET for transmitting the first DCI, which is not limited in the embodiments of the application.

[0077] The embodiments of the application illustrate that the terminal can determine at least one first TCI state based on the TCI state corresponding to the control resource set. As for the TCI state corresponding to the control resource set, the number of TCI states corresponding to the control resource set can be different, and the following describes how the terminal determines the TCI state based on the control resource set.

[0078] In some embodiments, the terminal determines at least one first TCI state based on the TCI state corresponding to the control resource set in the following any one way:

[0079] (1) In the case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

[0080] In the embodiments of the present application, the control resource set corresponds to one TCI state, and the terminal directly determines the one TCI state as the first TCI state.

[0081] For example, the control resource set used for sending the first DCI corresponds to one TCI state, and the terminal directly determines the TCI state as the first TCI state. For another example, the CORESET#0 corresponds to one TCI state, and the terminal directly determines the TCI state as the first TCI state.

[0082] (2) In the case where the control resource set corresponds to multiple TCI states, at least one first TCI state is one TCI state of the multiple TCI states corresponding to the control resource set.

[0083] In the embodiments of the present application, the control resource set corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states to determine as the first TCI state. That is, the terminal can select one TCI state from the multiple TCI states according to a default rule, and then determine the selected TCI state as the first TCI state.

[0084] For example, the control resource set used for sending the first DCI corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states corresponding to the control resource set used for sending the first DCI to determine as the first TCI state. For another example, the CORESET#0 corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states corresponding to the CORESET#0 to determine as the first TCI state.

[0085] Alternatively, if the multiple TCI states corresponding to the control resource set include a first TCI state#1 and a second TCI state#2, the terminal can determine the first TCI state (TCI state#1) as the first TCI state, or the terminal can determine the second TCI state (TCI state#2) as the first TCI state.

[0086] (3) In the case where the control resource set corresponds to multiple TCI states, at least one first TCI state is the multiple TCI states corresponding to the control resource set.

[0087] In the embodiments of the present application, the control resource set corresponds to multiple TCI states, and the terminal can determine all the multiple TCI states as the first TCI state. That is, the terminal can determine the multiple TCI states corresponding to the control resource set as the first TCI state.

[0088] For example, if the control resource set used for sending the first DCI corresponds to multiple TCI states, the terminal can determine the multiple TCI states corresponding to the control resource set used for sending the first DCI as the first TCI states. For another example, if the CORESET#0 corresponds to multiple TCI states, the terminal can determine the multiple TCI states corresponding to the CORESET#0 as the first TCI states.

[0089] Optionally, if the multiple TCI states corresponding to the control resource set include TCI state#1 and TCI state#2, the terminal can determine both the first TCI state (TCI state#1) and the second TCI state (TCI state#2) as the first TCI states.

[0090] It should be noted that the embodiments of the present application are described by taking TCI states as an example. In another embodiment, when the physical shared channel is a PDSCH, the TCI states determined based on the control resource set include joint TCI states and / or downlink TCI states, that is, the terminal can determine the TCI states corresponding to the physical shared channel according to the joint TCI states and / or the downlink TCI states corresponding to the control resource set. In another embodiment, when the physical shared channel is a PUSCH, the TCI states determined based on the control resource set include joint TCI states and / or uplink TCI states, that is, the terminal can determine the TCI states corresponding to the physical shared channel according to the joint TCI states and / or the uplink TCI states corresponding to the control resource set.

[0091] In the scheme provided by the embodiments of the present application, the terminal can determine the TCI states corresponding to the physical shared channel based on the TCI states corresponding to the control resource set, and then ensure the transmission of the physical shared channel based on the determined TCI states, thereby improving the flexibility of the transmission of the physical shared channel.

[0092] The above embodiments describe how the terminal determines the first TCI states according to the TCI states corresponding to the control resource set. Next, how the terminal determines the TCI states corresponding to the control resource set will be described. Figure 4 A flowchart of a TCI state indication method provided by an example embodiment of the present application is shown, which can be applied in the terminal and the network device shown in Figure 1 The method includes at least part of the following contents:

[0093] Step 401: The network device sends first indication information to the terminal, the first indication information being used to indicate N TCI states, each TCI state including at least one of joint TCI states, uplink TCI states and downlink TCI states, the TCI states corresponding to the control resource set being a subset of the N TCI states, N being a positive integer.

[0094] Step 402: The terminal receives the first indication information sent by the network device.

[0095] In the embodiment of the present application, the network device can inform the terminal of N TCI states through the indication information, and the terminal can determine the TCI state corresponding to the control resource set based on the N TCI states subsequently, where N is a positive integer.

[0096] The TCI state includes at least one of joint TCI state, uplink TCI state and downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, which is not limited in the embodiment of the present application.

[0097] In some embodiments, the N TCI states include QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS. That is, the N TCI states in the embodiment of the present application can be used for QCL indication of at least one of the above channels and / or at least one signal.

[0098] In some embodiments, the first indication information is carried in a third Medium Access Control Control Element (MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0099] Optionally, the third MAC CE is used to indicate the N TCI states corresponding to one code point in the TCI field of DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without sending the DCI, and the N TCI states indicated in the third MAC CE correspond to only one code point in the TCI field of the DCI, so that the base station does not need to send the DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0100] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate one of the at least two code points. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information at the same time, the fourth MAC CE indicates that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate the code point, and then the N TCI states corresponding to the code point are obtained by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of code point configurations, and each set of code point configurations corresponds to N TCI states. It should be noted that each code point corresponds to N TCI states, and the value of N corresponding to each code point can be the same or different.

[0101] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to part or all of the N TCI states configured by the network device according to the N TCI states.

[0102] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to being applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS, and SRS.

[0103] Step 403: The network device sends second indication information to the terminal, the second indication information being used to indicate that the control resource set corresponds to at least one of the N TCI states, or the second indication information being used to indicate that the control resource set corresponds to at least one of the N TCI states corresponding to the control resource set group.

[0104] The N TCI states include multiple joint TCI states and / or downlink TCI states.

[0105] Step 404: The terminal receives the second indication information sent by the network device.

[0106] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the network device can configure the corresponding TCI state for the control resource set of the terminal through the second indication information, and the TCI state corresponding to the configured control resource set belongs to the N TCI states.

[0107] The second indication information can indicate the TCI state corresponding to the control resource set in two ways.

[0108] For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the second indication information can indicate that the TCI state #1 and the TCI state #2 are the TCI states corresponding to the control resource set. Alternatively, the second indication information can indicate that the TCI state #1 and the TCI state #4 are the TCI states corresponding to the control resource set. For another example, the N TCI states include the TCI state #1 and the TCI state #2, and the second indication information can indicate that the TCI state #1 is the TCI state corresponding to the control resource set.

[0109] Alternatively, the second indication information is used to indicate that the control resource set corresponding control resource set group corresponds to at least one of the N TCI states. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the second indication information can indicate that the TCI state #1 and the TCI state #2 are the TCI states corresponding to the control resource set group #1, and the control resource set corresponding control resource set group is the control resource set group #1, so the TCI states corresponding to the control resource set are the TCI state #1 and the TCI state #2. Alternatively, the second indication information can indicate that the TCI state #1 and the TCI state #4 are the TCI states corresponding to the control resource set group corresponding to the control resource set. For another example, the N TCI states include the TCI state #1 and the TCI state #2, and the second indication information can indicate that the TCI state #1 is the TCI state corresponding to the control resource set group #1, and the control resource set corresponding control resource set group is the control resource set group #1, so the TCI states corresponding to the control resource set are the TCI state #1.

[0110] Optionally, the correspondence between the control resource set and the control resource set group is configured by RRC and / or MAC CE. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by RRC and / or MAC CE.

[0111] In some embodiments, the second indication information is indicated by at least one of RRC and the first MAC CE.

[0112] It should be noted that the embodiments of the present application are only used as an example of steps 403-404. In another embodiment, steps 403-404 can also not be performed, and the terminal can determine the TCI state corresponding to the control resource set from the N TCI states by default rules.

[0113] In the embodiments of the present application, the N TCI states include a plurality of joint TCI states and / or downlink TCI states; and the scheme for the terminal to determine the TCI state of the control resource set includes any one of the following:

[0114] The first scheme is to determine at least one of the N TCI states as the TCI state corresponding to the control resource set by default.

[0115] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the terminal can determine the TCI state corresponding to the control resource set according to the default rule, and the TCI state corresponding to the control resource set belongs to the N TCI states.

[0116] For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and TCI state #1 and TCI state #2 are determined as the TCI states corresponding to the control resource set. Or, TCI state #1 and TCI state #4 are determined as the TCI states corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and TCI state #1 is determined as the TCI state corresponding to the control resource set.

[0117] The second scheme is to determine at least one of the N TCI states as the TCI state corresponding to the control resource set group of the control resource set by default.

[0118] For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and TCI state #1 and TCI state #2 are determined as the TCI states corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1 and TCI state #2. Or, TCI state #1 and TCI state #4 are determined as the TCI states corresponding to the control resource set group of the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and TCI state #1 is determined as the TCI state corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1.

[0119] Optionally, the correspondence between the control resource set and the control resource set group is configured by using RRC and / or MAC CE. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by using RRC and / or MAC CE.

[0120] In the scheme provided by the embodiments of the present application, the network device configures N TCI states for the terminal, and the terminal determines the TCI state corresponding to the control resource set based on the configured N TCI states, which expands the manner in which the terminal determines the TCI state corresponding to the control resource set, and further ensures the transmission of the physical shared channel based on the determined TCI state, thereby improving the flexibility of the transmission of the physical shared channel.

[0121] It should be noted that the embodiments of the present application are only described by taking the terminal determining the TCI state corresponding to the control resource set based on the N TCI states configured by the network device as an example. In another embodiment, the network device can directly configure the TCI state corresponding to the control resource set for the terminal, without determining the TCI state corresponding to the control resource set based on the N TCI states.

[0122] In the embodiments of the present application, the network device sends a second MAC CE to the terminal, the second MAC CE being used to indicate one or more TCI states corresponding to the control resource set, and the terminal receives the second MAC CE sent by the network device, so as to determine the one or more TCI states corresponding to the control resource set indicated by the second MAC CE, and subsequently the terminal can determine at least one first TCI state according to the TCI state corresponding to the control resource set.

[0123] Figure 3 The embodiments shown above illustrate the terminal determining the first TCI state. The following describes how the terminal determines the first TCI state according to the N TCI states configured by the network device. Figure 5 A flow chart of a TCI state determination method provided by an example embodiment of the present application is shown, which can be applied to, for example, Figure 1 The terminal and the network device shown above, and the method includes at least part of the following contents:

[0124] Step 501: The network device sends third indication information to the terminal, the third indication information being used to indicate N TCI states, the TCI state including at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, the TCI state corresponding to the control resource set being a subset of the N TCI states, and N being a positive integer.

[0125] Step 502: The terminal receives the third indication information sent by the network device.

[0126] In the embodiments of the present application, the network device can inform the terminal of N TCI states through the indication information, and the terminal can determine at least one first TCI state corresponding to the physical shared channel based on the N TCI states, where N is a positive integer.

[0127] The TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, which is not limited in the embodiments of the present application.

[0128] In some embodiments, the N TCI states include QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS. That is, the N TCI states in the embodiments of the present application can be used for QCL indications of at least one of the above channels and / or at least one signal.

[0129] In some embodiments, the third indication information is carried in a third medium access control control element (MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0130] Optionally, the third MAC CE is used to indicate the N TCI states corresponding to one code point in the TCI field of the DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without sending the DCI, and the N TCI states indicated in the third MAC CE correspond to only one code point in the TCI field of the DCI, so that the base station does not need to send the DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0131] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate one code point in the at least two code points. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information at the same time, the fourth MAC CE indicates that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate the code point, and then the N TCI states corresponding to the code point are obtained by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of code point configurations, and each set of code point configurations corresponds to N TCI states. It should be noted that each code point corresponds to N TCI states, and the N values corresponding to each code point can be the same or different.

[0132] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to a part or all of the N TCI states according to the N TCI states configured by the network device.

[0133] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to being applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS, and SRS.

[0134] Step 503: The terminal determines at least one first TCI state based on the N TCI states.

[0135] In the embodiments of the present application, the terminal determines the N TCI states configured by the network device, and then the terminal can select at least one TCI state from the N TCI states to determine as the first TCI state.

[0136] In some embodiments, the terminal determines at least one TCI state in the N TCI states as the at least one first TCI state by default.

[0137] In the embodiments of the present application, the terminal determines at least one of the N TCI states as the at least one first TCI state by default. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the terminal determines TCI state #1 and TCI state #2 as the first TCI state. Alternatively, the terminal determines TCI state #1 and TCI state #4 as the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2, and the terminal determines TCI state #1 as the first TCI state.

[0138] Alternatively, when the physical shared channel is a PDSCH, and the TCI states of the N TCI states that are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, the terminal can determine, by default, the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, as the first TCI state.

[0139] Alternatively, when the physical shared channel is a PUSCH, and the TCI states of the N TCI states that are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, the terminal can determine, by default, the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #3, or both TCI states, i.e., TCI state #1 and TCI state #3, as the first TCI state.

[0140] In some other embodiments, the terminal determines at least one of the N TCI states indicated by the network device through the indication information as the first TCI state.

[0141] The network device sends fourth indication information to the terminal, where the fourth indication information is used to indicate at least one of the N TCI states, and the terminal receives the fourth indication information and determines at least one of the N TCI states indicated by the fourth indication information as the at least one first TCI state.

[0142] The fourth indication information is used to indicate at least one first TCI state as at least one TCI state of the N TCI states. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4. The fourth indication information can indicate TCI state #1 and TCI state #2 as the first TCI state. Or, the fourth indication information can indicate TCI state #1 and TCI state #4 as the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2. The fourth indication information can indicate TCI state #1 as the first TCI state.

[0143] Optionally, when the physical shared channel is a PDSCH, and the TCI states of the N TCI states which are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, the fourth indication information can indicate the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, as the first TCI state.

[0144] Optionally, when the physical shared channel is a PUSCH, and the TCI states of the N TCI states which are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, the fourth indication information can indicate the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #3, or both TCI states, i.e., TCI state #1 and TCI state #3, as the first TCI state.

[0145] Optionally, the fourth indication information is indicated by at least one of RRC, MAC CE and DCI. For example, the fourth indication information is indicated by RRC. Or, the fourth indication information is indicated by MAC CE. Or, the fourth indication information is indicated by DCI.

[0146] In some embodiments, the fourth indication information can be indicated by DCI.

[0147] Optionally, the DCI indicating the fourth indication information is DCI format 1_1 or DCI format 1_2. Or, the DCI is DCI format 0_1 or DCI format 0_2.

[0148] For example, if the DCI is DCI format 1_1 or DCI format 1_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PDSCH. If the DCI is DCI format 0_1 or DCI format 0_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PUSCH.

[0149] In some embodiments, the DCI indicating the fourth indication information can include a transmission resource configuration (DL assignment or UL assignment), i.e., used to indicate the time domain resource, the frequency domain resource, the modulation and coding scheme (MCS), etc. of the PDSCH or the PUSCH; or the DCI can also not include the transmission resource configuration, i.e., does not include the time domain resource, the frequency domain resource, the modulation and coding scheme (MCS), etc. of the PDSCH or the PUSCH.

[0150] In the scheme provided by the embodiments of the present application, the terminal determines at least one first TCI state for the physical shared channel according to the N TCI states configured by the network device, and then transmits the physical shared channel based on the determined TCI state, thereby improving the flexibility of transmitting the physical shared channel.

[0151] It should be noted that, in the first MAC CE, the second MAC CE, the third MAC CE, the fourth MAC CE, the MAC CE carrying the second indication information, and the MAC CE carrying the fourth indication information in the present application, any two or more MAC CEs can be different MAC CEs or the same MAC CE. Similarly, in the first DCI, the second DCI, and the DCI carrying the fourth indication information in the present application, any two or more DCIs can be different DCIs or the same DCI. In addition, the RRC carrying the second indication information and the RRC carrying the fourth indication information in the present application can be different RRCs or the same RRC.

[0152] It should be noted that the above embodiments can be split into new embodiments or combined with other embodiments to form new embodiments, and the present application does not limit the combination of embodiments.

[0153] Figure 6 A flowchart of a TCI state determination method provided by an exemplary embodiment of the present application is shown, which can be applied to, for example, Figure 1 The method includes at least part of the following contents:

[0154] Step 601: The terminal receives the first DCI sent by the network device, and the first DCI is used to indicate the transmission resource of the physical shared channel.

[0155] The first DCI is used for indicating a transmission resource of a physical shared channel, that is, the first DCI is used for scheduling the physical shared channel, and then the network device and the terminal can perform data transmission based on the physical shared channel. The transmission resource refers to a resource occupied by the network device and the terminal when transmitting data through the physical shared channel.

[0156] In some embodiments, the transmission resource includes at least one of a time domain resource, a frequency domain resource, and other resources, which are not limited in the embodiments of the present application.

[0157] In some embodiments, the physical shared channel includes at least one of a PDSCH and a PUSCH.

[0158] For the first DCI used for indicating the physical shared channel, the physical shared channel is different, and the first DCI is also different.

[0159] Optionally, if the physical shared channel is a PDSCH, the first DCI is a DCI format 1_0, and if the physical shared channel is a PUSCH, the first DCI is a DCI format 0_0.

[0160] Step 602: The terminal determines at least one first TCI state corresponding to the physical shared channel.

[0161] In the embodiments of the present application, the terminal determines the transmission resource of the physical shared channel indicated by the first DCI, and then can determine at least one first TCI state corresponding to the physical shared channel, so as to perform data transmission between the terminal and the network device based on the determined at least one first TCI state.

[0162] It should be noted that the embodiments of the present application are described based on the terminal determining at least one first TCI state corresponding to the physical shared channel. The first DCI used for indicating the transmission resource of the physical shared channel does not indicate the at least one first TCI state, that is, the function of the first DCI is only used for indicating the transmission resource, and is not used for indicating the TCI state.

[0163] The present application provides a scheme for determining the transmission resource of the physical shared channel indicated by the DCI, and then determining the TCI state corresponding to the physical shared channel, which ensures the transmission of the physical shared channel based on the determined TCI state, and improves the flexibility of transmitting the physical shared channel.

[0164] Figure 6 The embodiments shown illustrate the terminal determining the first TCI state. How the terminal determines the first TCI state according to the control resource set is described below.

[0165] In some embodiments, the control resource set corresponds to a TCI state, and the terminal determines at least one first TCI state based on the TCI state corresponding to the control resource set.

[0166] In this embodiment of the application, there is a correspondence between the control resource set and the TCI state. The terminal can determine the TCI state corresponding to the control resource set based on the control resource set, and then determine at least one first TCI state from the TCI states corresponding to the control resource set.

[0167] In some embodiments, the control resource set includes control resource sets for different purposes. For example, the control resource set is a control resource set for transmitting the first DCI, or the control resource set is CORESET#0.

[0168] In other words, the terminal can determine at least one first TCI state based on the TCI state corresponding to the control resource set used to send the first DCI. Alternatively, the terminal can also determine an indication of a first TCI state based on the TCI state corresponding to CORESET#0.

[0169] It should be noted that CORESET#0 in this application embodiment may also be a CORESET used to send the first DCI, or CORESET#0 may not be a CORESET used to send the first DCI. This application embodiment does not limit this.

[0170] This application embodiment describes how a terminal can determine at least one first TCI state based on the TCI state corresponding to a control resource set. However, the number of TCI states corresponding to a control resource set may vary. The following explains how the terminal determines the TCI state based on the control resource set.

[0171] In some embodiments, the terminal determines at least one first TCI state based on the TCI state corresponding to the control resource set in any of the following ways:

[0172] (1) When a control resource set corresponds to a TCI state, at least one first TCI state is a TCI state corresponding to the control resource set.

[0173] In this embodiment of the application, if a control resource set corresponds to a TCI state, the terminal directly determines this TCI state as the first TCI state.

[0174] For example, if the control resource set used to send the first DCI corresponds to a TCI state, the terminal directly determines that TCI state as the first TCI state. As another example, if CORESET#0 corresponds to a TCI state, the terminal directly determines that TCI state as the first TCI state.

[0175] (2) In a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one of the multiple TCI states corresponding to the control resource set.

[0176] In an embodiment of the present application, the control resource set corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states to determine as the first TCI state. That is, the terminal can select one TCI state from the multiple TCI states according to a default rule, and then determine the selected TCI state as the first TCI state.

[0177] For example, the control resource set used for transmitting the first DCI corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states corresponding to the control resource set used for transmitting the first DCI to determine as the first TCI state. For another example, the CORESET#0 corresponds to multiple TCI states, and the terminal can select one TCI state from the multiple TCI states corresponding to the CORESET#0 to determine as the first TCI state.

[0178] Optionally, if the multiple TCI states corresponding to the control resource set include a first TCI state#1 and a second TCI state#2, the terminal can determine the first TCI state#1 as the first TCI state, or the terminal can determine the second TCI state#2 as the first TCI state.

[0179] (3) In a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set.

[0180] In an embodiment of the present application, the control resource set corresponds to multiple TCI states, and the terminal can determine all the multiple TCI states as the first TCI state. That is, the terminal can determine the multiple TCI states corresponding to the control resource set as the first TCI state.

[0181] For example, the control resource set used for transmitting the first DCI corresponds to multiple TCI states, and the terminal can determine the multiple TCI states corresponding to the control resource set used for transmitting the first DCI as the first TCI state. For another example, the CORESET#0 corresponds to multiple TCI states, and the terminal can determine the multiple TCI states corresponding to the CORESET#0 as the first TCI state.

[0182] Optionally, if the multiple TCI states corresponding to the control resource set include a first TCI state#1 and a second TCI state#2, the terminal can determine the first TCI state#1 and the second TCI state#2 as the first TCI state.

[0183] It should be noted that the embodiments of the present application are described by taking the TCI state as an example. In another embodiment, when the physical shared channel is a PDSCH, the TCI state determined based on the control resource set includes a joint TCI state and / or a downlink TCI state, that is, the terminal can determine the TCI state corresponding to the physical shared channel according to the joint TCI state and / or the downlink TCI state corresponding to the control resource set. In another embodiment, when the physical shared channel is a PUSCH, the TCI state determined based on the control resource set includes a joint TCI state and / or an uplink TCI state, that is, the terminal can determine the TCI state corresponding to the physical shared channel according to the joint TCI state and / or the uplink TCI state corresponding to the control resource set.

[0184] In the scheme provided by the embodiments of the present application, the terminal can determine the TCI state corresponding to the physical shared channel based on the TCI state corresponding to the control resource set, and then ensure the transmission of the physical shared channel based on the determined TCI state, thereby improving the flexibility of the transmission of the physical shared channel.

[0185] The above embodiments describe how the terminal determines the first TCI state according to the TCI state corresponding to the control resource set. In the following, how the terminal determines the TCI state corresponding to the control resource set will be described.

[0186] In some embodiments, the terminal receives first indication information sent by the network device, the first indication information is used to indicate N TCI states, each TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, the TCI state corresponding to the control resource set is a subset of the N TCI states, and N is a positive integer.

[0187] In the embodiments of the present application, the network device can inform the terminal of N TCI states through the indication information, and the terminal can determine the TCI state corresponding to the control resource set based on the N TCI states, and N is a positive integer.

[0188] The TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, which are not limited by the embodiments of the present application.

[0189] In some embodiments, the N TCI states include QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS, and SRS. That is, the N TCI states in the embodiments of the present application can be used for QCL indications of at least one of the above channels and / or at least one of the above signals.

[0190] In some embodiments, the first indication information is carried in a third Medium Access Control Control Element (MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0191] Optionally, the third MAC CE is used to indicate that the N TCI states correspond to one code point in a TCI field of DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without sending the DCI, and the N TCI states indicated in the third MAC CE correspond to only one code point in the TCI field of the DCI, so the base station does not need to send the DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0192] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the N TCI states correspond to at least two code points in a TCI field of the second DCI respectively, and the second DCI is used to indicate one of the at least two code points. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information, the fourth MAC CE indicates that the N TCI states correspond to at least two code points in the TCI field of the second DCI respectively, and the second DCI is used to indicate the code point, and then the N TCI states corresponding to the code point are obtained by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of code point configurations, and each set of code point configurations corresponds to N TCI states. It should be noted that each code point corresponds to N TCI states, and the value of N corresponding to each code point can be the same or different.

[0193] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to a part or all of the N TCI states according to the N TCI states configured by the network device.

[0194] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to be applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS.

[0195] In some embodiments, the terminal receives second indication information sent by the network device, the second indication information being used to indicate that the control resource set corresponds to at least one of the N TCI states, or the second indication information being used to indicate that a control resource set group corresponding to the control resource set corresponds to at least one of the N TCI states.

[0196] The N TCI states include a plurality of joint TCI states and / or downlink TCI states.

[0197] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the network device can configure the corresponding TCI state for the control resource set of the terminal through the second indication information, and the TCI state corresponding to the configured control resource set belongs to the N TCI states.

[0198] The second indication information can indicate the TCI state corresponding to the control resource set in two ways.

[0199] The second indication information is used to indicate that the control resource set corresponds to at least one of the N TCI states. For example, the N TCI states include TCI state #1 and TCI state #2, TCI state #3 and TCI state #4, and the second indication information can indicate that TCI state #1 and TCI state #2 are the TCI states corresponding to the control resource set. Alternatively, the second indication information can indicate that TCI state #1 and TCI state #4 are the TCI states corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and the second indication information can indicate that TCI state #1 is the TCI state corresponding to the control resource set.

[0200] Or, the second indication information is used to indicate that the control resource set corresponds to at least one TCI state in the N TCI states corresponding to the control resource set group. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, the second indication information can indicate that the TCI state #1 and the TCI state #2 are the TCI states corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is the TCI state #1 and the TCI state #2. Or, the second indication information can indicate that the TCI state #1 and the TCI state #4 are the TCI states corresponding to the control resource set group corresponding to the control resource set. For another example, the N TCI states include the TCI state #1 and the TCI state #2, the second indication information can indicate that the TCI state #1 is the TCI state corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is the TCI state #1.

[0201] Optionally, the correspondence between the control resource set and the control resource set group is configured by RRC. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by RRC.

[0202] In some embodiments, the second indication information is indicated by at least one of RRC and the first MAC CE.

[0203] In another embodiment, the terminal can determine the TCI state corresponding to the control resource set from the N TCI states according to a default rule.

[0204] In the embodiments of the present application, the N TCI states include a plurality of joint TCI states and / or downlink TCI states; and the scheme for the terminal to determine the TCI state of the control resource set includes any one of the following:

[0205] The first kind: at least one TCI state in the N TCI states is determined as the TCI state corresponding to the control resource set by default.

[0206] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the terminal can determine the TCI state corresponding to the control resource set according to a default rule, and the TCI state corresponding to the control resource set belongs to the N TCI states.

[0207] For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the terminal determines TCI state #1 and TCI state #2 as the TCI states corresponding to the control resource set. Or, the terminal determines TCI state #1 and TCI state #4 as the TCI states corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and the terminal determines TCI state #1 as the TCI state corresponding to the control resource set.

[0208] Secondly, the terminal determines at least one of the N TCI states as the TCI state corresponding to the control resource set group corresponding to the control resource set by default.

[0209] For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the terminal determines TCI state #1 and TCI state #2 as the TCI states corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1 and TCI state #2. Or, the terminal determines TCI state #1 and TCI state #4 as the TCI states corresponding to the control resource set group corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and the terminal determines TCI state #1 as the TCI state corresponding to the control resource set group #1, and the control resource set group corresponding to the control resource set is the control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1.

[0210] Optionally, the correspondence between the control resource set and the control resource set group is configured by RRC and / or MAC CE. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by RRC and / or MAC CE.

[0211] In the scheme provided by the embodiments of the present application, the network device configures N TCI states for the terminal, and the terminal determines the TCI state corresponding to the control resource set based on the configured N TCI states, which expands the way for the terminal to determine the TCI state corresponding to the control resource set, and further ensures the transmission of the physical shared channel based on the determined TCI state, and improves the flexibility of the transmission of the physical shared channel.

[0212] It should be noted that the embodiments of the present application are only described by taking the terminal determining the TCI state corresponding to the control resource set based on the N TCI states configured by the network device as an example. In another embodiment, the network device can directly configure the TCI state corresponding to the control resource set for the terminal, without determining the TCI state corresponding to the control resource set based on the N TCI states.

[0213] In the embodiments of the present application, the network device sends a second MAC CE to the terminal, and the second MAC CE is used to indicate one or more TCI states corresponding to the control resource set. The terminal receives the second MAC CE sent by the network device, and determines the one or more TCI states corresponding to the control resource set indicated by the second MAC CE. Subsequently, the terminal can determine at least one first TCI state according to the TCI state corresponding to the control resource set.

[0214] Figure 6 The embodiments shown above illustrate the terminal determining the first TCI state. The following describes how the terminal determines the first TCI state according to the N TCI states configured by the network device.

[0215] In some embodiments, the terminal receives third indication information sent by the network device, the third indication information is used to indicate N TCI states, the TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, the TCI state corresponding to the control resource set is a subset of the N TCI states, N is a positive integer, and the terminal determines at least one first TCI state based on the N TCI states.

[0216] In the embodiments of the present application, the network device can inform the terminal of the N TCI states through the indication information, and subsequently the terminal can determine at least one first TCI state corresponding to the physical shared channel based on the N TCI states, N being a positive integer.

[0217] The TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, which are not limited in the embodiments of the present application.

[0218] In some embodiments, the N TCI states include QCL indication for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS. That is, the N TCI states in the embodiments of the present application can be used for QCL indication of at least one of the above channels and / or at least one signal.

[0219] In some embodiments, the third indication information is carried in a third Medium Access Control Control Element (MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0220] Optionally, the third MAC CE is used to indicate that the N TCI states correspond to one code point in a TCI field of a DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without the DCI, and the N TCI states indicated in the third MAC CE correspond to only one code point in the TCI field of the DCI, so that the base station does not need to additionally send the DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0221] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the N TCI states correspond to at least two code points in a TCI field of the second DCI respectively, and the second DCI is used to indicate one of the at least two code points. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information simultaneously, the fourth MAC CE indicates that the N TCI states correspond to at least two code points in the TCI field of the second DCI respectively, and the second DCI is used to indicate the code point, and then the N TCI states corresponding to the code point are obtained by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of code point configurations, and each set of code point configurations corresponds to N TCI states. It should be noted that each code point corresponds to N TCI states, and the value of N corresponding to each code point can be the same or different.

[0222] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to a part or all of the N TCI states according to the N TCI states configured by the network device.

[0223] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to being applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS, and SRS.

[0224] In the embodiments of the present application, the terminal determines the N TCI states configured by the network device, and then the terminal can select at least one TCI state from the N TCI states as the first TCI state.

[0225] In some embodiments, the terminal determines at least one of the N TCI states as the at least one first TCI state by default.

[0226] In the embodiments of the present application, the terminal determines at least one of the N TCI states as the at least one first TCI state by default. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the terminal determines TCI state #1 and TCI state #2 as the first TCI state. Alternatively, the terminal determines TCI state #1 and TCI state #4 as the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2, and the terminal determines TCI state #1 as the first TCI state.

[0227] Optionally, when the physical shared channel is a PDSCH, and the TCI states of the N TCI states that are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, the terminal can determine, by default, the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, as the first TCI state.

[0228] Optionally, when the physical shared channel is a PUSCH, and the TCI states of the N TCI states that are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, the terminal can determine, by default, the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #3, or both TCI states, i.e., TCI state #1 and TCI state #3, as the first TCI state.

[0229] In some other embodiments, the terminal determines at least one of the N TCI states indicated by the network device through the indication information as the first TCI state.

[0230] In some other embodiments, the terminal determines at least one of the N TCI states indicated by the network device through the indication information as the first TCI state.

[0231] The fourth indication information is used to indicate at least one first TCI state as at least one TCI state of the N TCI states. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4. The fourth indication information can indicate TCI state #1 and TCI state #2 as the first TCI state. Or, the fourth indication information can indicate TCI state #1 and TCI state #4 as the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2. The fourth indication information can indicate TCI state #1 as the first TCI state.

[0232] Optionally, when the physical shared channel is a PDSCH, and the TCI states of the N TCI states which are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, the fourth indication information can indicate the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, as the first TCI state.

[0233] Optionally, when the physical shared channel is a PUSCH, and the TCI states of the N TCI states which are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, the fourth indication information can indicate the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #3, or both TCI states, i.e., TCI state #1 and TCI state #3, as the first TCI state.

[0234] Optionally, the fourth indication information is indicated by at least one of RRC, MAC CE and DCI. For example, the fourth indication information is indicated by RRC. Or, the fourth indication information is indicated by MAC CE. Or, the fourth indication information is indicated by DCI.

[0235] In some embodiments, the fourth indication information can be indicated by DCI.

[0236] Optionally, the DCI indicating the fourth indication information is DCI format 1_1 or DCI format 1_2. Or, the DCI indicating the fourth indication information is DCI format 0_1 or DCI format 0_2.

[0237] For example, if the DCI is DCI format 1_1 or DCI format 1_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PDSCH. If the DCI is DCI format 0_1 or DCI format 0_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PUSCH.

[0238] In some embodiments, the DCI indicating the fourth indication information can include a transmission resource configuration (DL assignment or UL assignment), i.e., used to indicate the time domain resource, frequency domain resource, modulation and coding scheme MCS, etc. of the PDSCH or PUSCH; or the DCI can also not include the transmission resource configuration, i.e., does not include the time domain resource, frequency domain resource, modulation and coding scheme MCS, etc. of the PDSCH or PUSCH.

[0239] In the scheme provided by the embodiments of the application, the terminal determines at least one first TCI state for the physical shared channel according to the N TCI states configured by the network device, and then transmits the physical shared channel based on the determined TCI state, thereby improving the flexibility of transmitting the physical shared channel.

[0240] It should be noted that, in the first MAC CE, the second MAC CE, the third MAC CE, the fourth MAC CE, the MAC CE carrying the second indication information, and the MAC CE carrying the fourth indication information in the application, any two or more MAC CEs can be different MAC CEs or the same MAC CE. Similarly, in the first DCI, the second DCI, and the DCI carrying the fourth indication information in the application, any two or more DCIs can be different DCIs or the same DCI. In addition, the RRC carrying the second indication information and the RRC carrying the fourth indication information in the application can be different RRCs or the same RRC.

[0241] Figure 7 A flowchart of a TCI state determination method provided by an exemplary embodiment of the application is shown, which can be applied to, for example, Figure 1 The method includes at least part of the following contents:

[0242] Step 701: The network device sends a first DCI to the terminal, and the first DCI is used to indicate the transmission resource of the physical shared channel, and the terminal is used to determine at least one first TCI state corresponding to the physical shared channel.

[0243] The first DCI is used for indicating a transmission resource of a physical shared channel, that is, the first DCI is used for scheduling the physical shared channel, and then the network device and the terminal can perform data transmission based on the physical shared channel. The transmission resource refers to a resource occupied by the network device and the terminal when transmitting data through the physical shared channel.

[0244] In some embodiments, the transmission resource includes at least one of a time domain resource, a frequency domain resource, and other resources, which are not limited in the embodiments of the present application.

[0245] In some embodiments, the physical shared channel includes at least one of a PDSCH and a PUSCH.

[0246] For the first DCI used for indicating the physical shared channel, the physical shared channel is different, and the first DCI is also different.

[0247] Optionally, if the physical shared channel is a PDSCH, the first DCI is a DCI format 1_0, and if the physical shared channel is a PUSCH, the first DCI is a DCI format 0_0.

[0248] In the embodiments of the present application, the terminal determines the transmission resource of the physical shared channel indicated by the first DCI, and then can determine at least one first TCI state corresponding to the physical shared channel, so as to perform data transmission between the terminal and the network device based on the determined at least one first TCI state.

[0249] It should be noted that the embodiments of the present application are described based on the terminal determining at least one first TCI state corresponding to the physical shared channel. The first DCI used for indicating the transmission resource of the physical shared channel does not indicate at least one first TCI state, that is, the function of the first DCI is only used for indicating the transmission resource, and is not used for indicating the TCI state.

[0250] The present application provides a scheme for determining the transmission resource of the physical shared channel indicated by the DCI, and then determining the TCI state corresponding to the physical shared channel, which guarantees the transmission of the physical shared channel based on the determined TCI state, and improves the flexibility of transmitting the physical shared channel.

[0251] Figure 7 The embodiments shown illustrate the terminal determining the first TCI state. How the terminal determines the first TCI state based on the control resource set is described below.

[0252] In some embodiments, the control resource set corresponds to a TCI state, and at least one first TCI state is determined based on the TCI state corresponding to the control resource set.

[0253] In the embodiments of the present application, the control resource set has a corresponding relationship with the TCI state, and the terminal can determine the at least one first TCI state from the TCI state corresponding to the control resource set based on the control resource set.

[0254] In some embodiments, the control resource set includes a control resource set for different purposes. For example, the control resource set is a control resource set for transmitting the first DCI, or the control resource set is CORESET#0.

[0255] That is, the terminal can determine the at least one first TCI state according to the TCI state corresponding to the control resource set for transmitting the first DCI. Alternatively, the terminal can also determine the indication of one first TCI state according to the TCI state corresponding to CORESET#0.

[0256] It should be noted that CORESET#0 in the embodiments of the present application can also be a CORESET for transmitting the first DCI, or CORESET#0 can not be a CORESET for transmitting the first DCI, which is not limited in the embodiments of the present application.

[0257] The embodiments of the present application explain that the terminal can determine the at least one first TCI state based on the TCI state corresponding to the control resource set. As for the TCI state corresponding to the control resource set, the number of the TCI state corresponding to the control resource set can be different, and the following explains how the terminal determines the TCI state corresponding to the control resource set.

[0258] In some embodiments, the terminal determines the at least one first TCI state based on the TCI state corresponding to the control resource set in the following any one way:

[0259] (1) In the case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

[0260] In the embodiments of the present application, the control resource set corresponds to one TCI state, and the terminal directly determines the one TCI state as the first TCI state.

[0261] For example, the control resource set for transmitting the first DCI corresponds to one TCI state, and the terminal directly determines the TCI state as the first TCI state. For another example, CORESET#0 corresponds to one TCI state, and the terminal directly determines the TCI state as the first TCI state.

[0262] (2) In a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one of the multiple TCI states corresponding to the control resource set.

[0263] In an embodiment of the present application, the control resource set corresponds to multiple TCI states, and the terminal can determine one of the multiple TCI states as the first TCI state. That is, the terminal can select one of the multiple TCI states according to a default rule, and then determine the selected TCI state as the first TCI state.

[0264] For example, the control resource set used for transmitting the first DCI corresponds to multiple TCI states, and the terminal can determine one of the multiple TCI states corresponding to the control resource set used for transmitting the first DCI as the first TCI state. For another example, the CORESET#0 corresponds to multiple TCI states, and the terminal can determine one of the multiple TCI states corresponding to the CORESET#0 as the first TCI state.

[0265] Alternatively, if the multiple TCI states corresponding to the control resource set include a first TCI state #1 and a second TCI state #2, the terminal can determine the first TCI state #1 as the first TCI state, or the terminal can determine the second TCI state #2 as the first TCI state.

[0266] (3) In a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set.

[0267] In an embodiment of the present application, the control resource set corresponds to multiple TCI states, and the terminal can determine all the multiple TCI states as the first TCI state. That is, the terminal can determine the multiple TCI states corresponding to the control resource set as the first TCI state.

[0268] For example, the control resource set used for transmitting the first DCI corresponds to multiple TCI states, and the terminal can determine the multiple TCI states corresponding to the control resource set used for transmitting the first DCI as the first TCI state. For another example, the CORESET#0 corresponds to multiple TCI states, and the terminal can determine the multiple TCI states corresponding to the CORESET#0 as the first TCI state.

[0269] Alternatively, if the multiple TCI states corresponding to the control resource set include a first TCI state #1 and a second TCI state #2, the terminal can determine the first TCI state #1 and the second TCI state #2 as the first TCI state.

[0270] It should be noted that the embodiments of the present application are described by taking the TCI state as an example. In another embodiment, when the physical shared channel is a PDSCH, the TCI state determined based on the control resource set includes a joint TCI state and / or a downlink TCI state, that is, the terminal can determine the TCI state corresponding to the physical shared channel according to the joint TCI state and / or the downlink TCI state corresponding to the control resource set. In another embodiment, when the physical shared channel is a PUSCH, the TCI state determined based on the control resource set includes a joint TCI state and / or an uplink TCI state, that is, the terminal can determine the TCI state corresponding to the physical shared channel according to the joint TCI state and / or the uplink TCI state corresponding to the control resource set.

[0271] In the scheme provided by the embodiments of the present application, the terminal can determine the TCI state corresponding to the physical shared channel based on the TCI state corresponding to the control resource set, and then ensure the transmission of the physical shared channel based on the determined TCI state, thereby improving the flexibility of the transmission of the physical shared channel.

[0272] The above embodiments describe how the terminal determines the first TCI state according to the TCI state corresponding to the control resource set. In the following, how the terminal determines the TCI state corresponding to the control resource set will be described.

[0273] In some embodiments, the network device sends first indication information to the terminal, the first indication information is used to indicate N TCI states, each TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, the TCI state corresponding to the control resource set is a subset of the N TCI states, and N is a positive integer.

[0274] In the embodiments of the present application, the network device can inform the terminal of the N TCI states through the indication information, and the terminal can determine the TCI state corresponding to the control resource set based on the N TCI states, and N is a positive integer.

[0275] The TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, which are not limited by the embodiments of the present application.

[0276] In some embodiments, the N TCI states include QCL indications for at least one of a PDCCH, a PDSCH, a PUCCH, a PUSCH, a CSI-RS and a SRS. That is, the N TCI states in the embodiments of the present application can be used for QCL indication of at least one of the above channels and / or at least one signal.

[0277] In some embodiments, the first indication information is carried in a third Medium Access Control Control Element (MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0278] Optionally, the third MAC CE is used to indicate that the N TCI states correspond to one codepoint in a TCI field of a DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without the DCI, and the N TCI states indicated in the third MAC CE correspond to only one codepoint in the TCI field of the DCI. Therefore, the base station does not need to send the DCI to the terminal to indicate the codepoint, thereby saving signaling overhead.

[0279] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the N TCI states correspond to at least two codepoints in a TCI field of the second DCI, and the second DCI is used to indicate one of the at least two codepoints. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information, the fourth MAC CE indicates that the N TCI states correspond to at least two codepoints in the TCI field of the second DCI, and the second DCI is used to indicate the codepoint, thereby querying the N TCI states corresponding to the codepoint by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of codepoint configurations, and each set of codepoint configurations corresponds to N TCI states. It should be noted that each codepoint corresponds to N TCI states, and the value of N corresponding to each codepoint can be the same or different.

[0280] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to a part or all of the N TCI states according to the N TCI states configured by the network device.

[0281] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to being applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS, and SRS.

[0282] In some embodiments, the network device sends second indication information to the terminal, the second indication information being used to indicate that the control resource set corresponds to at least one of the N TCI states, or the second indication information being used to indicate that the control resource set corresponds to a control resource set group corresponding to at least one of the N TCI states.

[0283] The N TCI states include a plurality of joint TCI states and / or downlink TCI states.

[0284] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the network device can configure the corresponding TCI state for the control resource set of the terminal through the second indication information, and the TCI state corresponding to the configured control resource set belongs to the N TCI states.

[0285] The second indication information can indicate the TCI state corresponding to the control resource set in two ways.

[0286] The second indication information is used to indicate that the control resource set corresponds to at least one of the N TCI states. For example, the N TCI states include TCI state #1 and TCI state #2, TCI state #3 and TCI state #4, and the second indication information can indicate that TCI state #1 and TCI state #2 are the TCI states corresponding to the control resource set. Or, the second indication information can indicate that TCI state #1 and TCI state #4 are the TCI states corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and the second indication information can indicate that TCI state #1 is the TCI state corresponding to the control resource set.

[0287] Or, the second indication information is used to indicate that the control resource set corresponds to a control resource set group corresponding to at least one of the N TCI states. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the second indication information can indicate that TCI state #1 and TCI state #2 are the TCI states corresponding to control resource set group #1, and the control resource set corresponding to the control resource set group is control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1 and TCI state #2. Or, the second indication information can indicate that TCI state #1 and TCI state #4 are the TCI states corresponding to the control resource set corresponding to the control resource set group. For another example, the N TCI states include TCI state #1 and TCI state #2, and the second indication information can indicate that TCI state #1 is the TCI state corresponding to control resource set group #1, and the control resource set corresponding to the control resource set group is control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1.

[0288] Optionally, the correspondence between the control resource set and the control resource set group is configured by RRC. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by RRC.

[0289] In some embodiments, the second indication information is indicated by at least one of RRC and a first MAC CE.

[0290] It should be noted that the terminal can also determine the TCI state corresponding to the control resource set from the N TCI states according to a default rule.

[0291] In the embodiments of the present application, the N TCI states include a plurality of joint TCI states and / or downlink TCI states; and the scheme for the terminal to determine the TCI state of the control resource set includes any one of the following:

[0292] Firstly, the TCI state corresponding to the control resource set is at least one of the N TCI states by default.

[0293] In the embodiments of the present application, after the terminal determines the N TCI states indicated by the network device, the terminal can determine the TCI state corresponding to the control resource set according to a default rule, and the TCI state corresponding to the control resource set belongs to the N TCI states.

[0294] Among them, the terminal determines at least one of the N TCI states as the TCI state corresponding to the control resource set by default. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and TCI state #1 and TCI state #2 are determined as the TCI state corresponding to the control resource set. Or, TCI state #1 and TCI state #4 are determined as the TCI state corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and TCI state #1 is determined as the TCI state corresponding to the control resource set.

[0295] Secondly, the TCI state corresponding to the control resource set group corresponding to the control resource set is at least one of the N TCI states by default.

[0296] The terminal determines at least one of the N TCI states as the TCI state corresponding to the control resource set group corresponding to the control resource set by default. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3, and TCI state #4, TCI state #1 and TCI state #2 are determined as the TCI states corresponding to control resource set group #1, and the control resource set group corresponding to the control resource set is control resource set group #1, so the TCI states corresponding to the control resource set are TCI state #1 and TCI state #2. Alternatively, TCI state #1 and TCI state #4 are determined as the TCI states corresponding to the control resource set group corresponding to the control resource set. For another example, the N TCI states include TCI state #1 and TCI state #2, and TCI state #1 is determined as the TCI state corresponding to control resource set group #1, and the control resource set group corresponding to the control resource set is control resource set group #1, so the TCI state corresponding to the control resource set is TCI state #1.

[0297] Optionally, the correspondence between the control resource set and the control resource set group is configured by RRC and / or MAC CE. That is, the network device configures the correspondence between the control resource set and the control resource set group for the terminal by RRC and / or MAC CE.

[0298] In the scheme provided by the embodiments of the present application, the network device configures N TCI states for the terminal, and the terminal determines the TCI state corresponding to the control resource set based on the configured N TCI states, which expands the way for the terminal to determine the TCI state corresponding to the control resource set, and further ensures the transmission of the physical shared channel based on the determined TCI state, thereby improving the flexibility of the transmission of the physical shared channel.

[0299] It should be noted that the embodiments of the present application only take the terminal determining one or more TCI states corresponding to the control resource set based on the N TCI states configured by the network device as an example for description. In another embodiment, the network device can directly configure one or more TCI states corresponding to the control resource set for the terminal, without determining the TCI state corresponding to the control resource set based on the N TCI states.

[0300] In the embodiments of the present application, the network device sends a second MAC CE to the terminal, and the second MAC CE is used to indicate the TCI state corresponding to the control resource set. The terminal receives the second MAC CE sent by the network device, and determines the TCI state corresponding to the control resource set indicated by the second MAC CE, and then determines at least one first TCI state according to the TCI state corresponding to the control resource set.

[0301] Figure 7The embodiment shown illustrates the terminal determining the first TCI state. The following illustrates how the terminal determines the first TCI state according to the N TCI states configured by the network device.

[0302] In some embodiments, the network device sends third indication information to the terminal, the third indication information is used to indicate N TCI states, the TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, the TCI state corresponding to the control resource set is a subset of the N TCI states, and N is a positive integer. The at least one first TCI state is determined based on the N TCI states.

[0303] In the embodiment of the present application, the network device can inform the terminal of the N TCI states through the indication information, and the terminal can determine at least one first TCI state corresponding to the physical shared channel based on the N TCI states, and N is a positive integer.

[0304] The TCI state includes at least one of a joint TCI state, an uplink TCI state and a downlink TCI state, that is, the N TCI states can include N joint TCI states, N uplink TCI states, N downlink TCI states, N downlink TCI states and uplink TCI states, or can also include N other TCI states, and the embodiment of the present application does not limit.

[0305] In some embodiments, the N TCI states include QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS. That is, the N TCI states in the embodiment of the present application can be used for QCL indication of at least one of the above channels and / or at least one signal.

[0306] In some embodiments, the third indication information is carried in a third medium access control layer control element (Medium Access Control Control Element, MAC CE), and the third MAC CE is used to indicate the N TCI states.

[0307] Optionally, the third MAC CE is used to indicate the N TCI states corresponding to one code point in the TCI field of the DCI (Downlink Control Information, DCI). That is, only the third MAC CE is sent without sending the DCI, and the N TCI states indicated in the third MAC CE only correspond to one code point in the TCI field of the DCI, so that the base station does not need to send the DCI to the terminal to indicate the code point, thereby saving signaling overhead.

[0308] In some embodiments, the first indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate one of the at least two code points. That is, the fourth MAC CE and the second DCI are used to indicate the second indication information at the same time, the fourth MAC CE indicates that the at least two code points in the TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate the code point, and then the N TCI states corresponding to the code point are obtained by querying the fourth MAC CE. At this time, the fourth MAC CE can indicate multiple sets of code point configurations, and each set of code point configurations corresponds to N TCI states. It should be noted that each code point corresponds to N TCI states, and the value of N corresponding to each code point can be the same or different.

[0309] In some embodiments, the terminal can determine that the TCI state corresponding to the control resource set actually refers to part or all of the N TCI states configured by the network device according to the N TCI states.

[0310] Optionally, the N TCI states are referred to as indicated TCI states, which means that the N TCI states can be applied to multiple channels / signals, and are not limited to being applied to a single channel / signal. For example, part or all of the N indicated TCI states can be used for transmission of at least two of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS.

[0311] In the embodiments of the present application, the terminal determines the N TCI states configured by the network device, and then the terminal can select at least one TCI state from the N TCI states to determine as the first TCI state.

[0312] In some embodiments, the terminal determines at least one TCI state from the N TCI states as at least one first TCI state by default.

[0313] In the embodiments of the present application, the terminal determines at least one TCI state from the N TCI states as at least one first TCI state by default. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3 and TCI state #4, and the TCI state #1 and the TCI state #2 are determined as the first TCI state. Or, the TCI state #1 and the TCI state #4 are determined as the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2, and the TCI state #1 is determined as the first TCI state.

[0314] Optionally, when the physical shared channel is a PDSCH, the TCI states of the N TCI states which are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, then the terminal can determine the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, as the first TCI state by default.

[0315] Optionally, when the physical shared channel is a PUSCH, the TCI states of the N TCI states which are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, then the terminal can determine the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #3, or both TCI states, i.e., TCI state #1 and TCI state #3, as the first TCI state by default.

[0316] In some other embodiments, the terminal determines at least one TCI state of the N TCI states indicated by the network device through the indication information as the first TCI state.

[0317] In some embodiments, the network device sends fourth indication information to the terminal, the fourth indication information being used to indicate at least one TCI state of the N TCI states, and the terminal receives the fourth indication information and determines at least one TCI state of the N TCI states indicated by the fourth indication information as at least one first TCI state.

[0318] In some embodiments, the fourth indication information is used to indicate that the at least one first TCI state is at least one TCI state of the N TCI states. For example, the N TCI states include TCI state #1, TCI state #2, TCI state #3, and TCI state #4, and the fourth indication information can indicate that TCI state #1 and TCI state #2 are the first TCI state. Or, the fourth indication information can indicate that TCI state #1 and TCI state #4 are the first TCI state. For another example, the N TCI states include TCI state #1 and TCI state #2, and the fourth indication information can indicate that TCI state #1 is the first TCI state.

[0319] Optionally, when the physical shared channel is a PDSCH, the TCI states of the N TCI states which are joint TCI states or DL TCI states include TCI state #1 and TCI state #2, then the fourth indication information can indicate that the first TCI state, i.e., TCI state #1, or the second TCI state, i.e., TCI state #2, or both TCI states, i.e., TCI state #1 and TCI state #2, is the first TCI state.

[0320] Optionally, when the physical shared channel is a PUSCH, the TCI states of the N TCI states that are joint TCI states or UL TCI states include TCI state #1 and TCI state #3, and the fourth indication information indicates the first TCI state, i.e., the TCI state #1, or the second TCI state, i.e., the TCI state #3, or both the TCI state #1 and the TCI state #3, as the first TCI state.

[0321] Optionally, the fourth indication information is indicated by at least one of RRC, MAC CE, and DCI. For example, the fourth indication information is indicated by RRC. Alternatively, the fourth indication information is indicated by MAC CE. Alternatively, the fourth indication information is indicated by DCI.

[0322] In some embodiments, the fourth indication information is indicated by DCI.

[0323] Optionally, the DCI indicating the fourth indication information is DCI format 1_1 or DCI format 1_2. Alternatively, the DCI indicating the fourth indication information is DCI format 0_1 or DCI format 0_2.

[0324] For example, if the DCI is DCI format 1_1 or DCI format 1_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PDSCH. If the DCI is DCI format 0_1 or DCI format 0_2, the DCI is used to indicate the fourth indication information of the first TCI state of the PUSCH.

[0325] In some embodiments, the DCI indicating the fourth indication information can include a transmission resource configuration (DL assignment or UL assignment), i.e., time domain resources, frequency domain resources, modulation and coding scheme (MCS), etc. of the PDSCH or the PUSCH; or the DCI can not include the transmission resource configuration, i.e., time domain resources, frequency domain resources, modulation and coding scheme (MCS), etc. of the PDSCH or the PUSCH.

[0326] The transmission resource configuration includes at least one of time domain resources, frequency domain resources, and MCS.

[0327] In the scheme provided by the embodiments of the present application, the terminal determines at least one first TCI state for the physical shared channel according to the N TCI states configured by the network device, and then transmits the physical shared channel based on the determined TCI state, thereby improving the flexibility of transmitting the physical shared channel.

[0328] It should be noted that, in the first MAC CE, the second MAC CE, the third MAC CE, the fourth MAC CE, the MAC CE carrying the second indication information, and the MAC CE carrying the fourth indication information in the present application, any two or more MAC CEs can be different MAC CEs or the same MAC CE. Similarly, in the first DCI, the second DCI, and the DCI carrying the fourth indication information in the present application, any two or more DCIs can be different DCIs or the same DCI. In addition, the RRC carrying the second indication information and the RRC carrying the fourth indication information in the present application can be different RRCs or the same RRC.

[0329] Figure 8 A block diagram of a TCI state determination apparatus provided by an example embodiment of the present application is shown, referring to FIG. 8. Figure 8 The apparatus includes:

[0330] The receiving module 801 is configured to receive a first DCI sent by a network device, wherein the first DCI is used to indicate a transmission resource of a physical shared channel.

[0331] The processing module 802 is configured to determine at least one first TCI state corresponding to the physical shared channel.

[0332] In some embodiments, the processing module 802 is further configured to determine the at least one first TCI state based on a TCI state corresponding to a control resource set.

[0333] In some embodiments, the control resource set is a control resource set used to send the first DCI, or the control resource set is CORESET#0.

[0334] In some embodiments, the processing module 802 is further configured to:

[0335] In the case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

[0336] Or,

[0337] In the case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one TCI state of the multiple TCI states corresponding to the control resource set.

[0338] Or,

[0339] In the case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set.

[0340] In some embodiments, the receiving module 801 is further configured to receive first indication information sent by the network device, the first indication information being used to indicate N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states, and the TCI states corresponding to the control resource set being a subset of the N TCI states, N being a positive integer.

[0341] In some embodiments, the N TCI states include multiple joint TCI states and / or downlink TCI states; and the receiving module 801 is further configured to receive second indication information sent by the network device.

[0342] The second indication information is used to indicate that the control resource set corresponds to at least one TCI state in the N TCI states.

[0343] Alternatively,

[0344] The second indication information is used to indicate that a control resource set group corresponding to the control resource set corresponds to at least one TCI state in the N TCI states.

[0345] In some embodiments, the second indication information is indicated by at least one of RRC and a first MAC CE.

[0346] In some embodiments, the N TCI states include multiple joint TCI states and / or downlink TCI states; and the processing module 802 is further configured to:

[0347] At least one TCI state in the N TCI states is determined as the TCI state corresponding to the control resource set by default;

[0348] Alternatively,

[0349] At least one TCI state in the N TCI states is determined as the TCI state corresponding to the control resource set group corresponding to the control resource set by default.

[0350] In some embodiments, the receiving module 801 is further configured to receive a second MAC CE sent by the network device, the second MAC CE being used to indicate the TCI state corresponding to the control resource set.

[0351] In some embodiments, the receiving module 801 is further configured to receive third indication information sent by the network device, the third indication information being used to indicate N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states;

[0352] The processing module 802 is further configured to determine at least one first TCI state based on the N TCI states.

[0353] In some embodiments, the processing module 802 is further configured to determine at least one TCI state of the N TCI states as the at least one first TCI state by default.

[0354] In some embodiments, the receiving module 801 is further configured to receive fourth indication information sent by the network device, the fourth indication information being used to indicate at least one TCI state of the N TCI states.

[0355] The processing module 802 is further configured to determine the at least one TCI state of the N TCI states indicated by the fourth indication information as the at least one first TCI state.

[0356] In some embodiments, the fourth indication information is indicated by at least one of RRC, MAC CE and DCI.

[0357] In some embodiments, the fourth indication information is indicated by the DCI, and the DCI is DCI format 1_1 or DCI format 1_2.

[0358] Alternatively,

[0359] The DCI is DCI format 0_1 or DCI format 0_2.

[0360] In some embodiments, the N TCI states include QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS.

[0361] In some embodiments, the first indication information and / or the third indication information is carried in a third MAC CE, and the third MAC CE is used to indicate the N TCI states; or,

[0362] The first indication information and / or the third indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that at least two code points in a transmission configuration indication TCI field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate one code point of the at least two code points.

[0363] In some embodiments, the first DCI is not used to indicate the at least one first TCI state.

[0364] In some embodiments, the physical shared channel includes at least one of PDSCH and PUSCH.

[0365] In some embodiments, the physical shared channel is a PDSCH, and the first DCI is a DCI format 1_0; and / or,

[0366] the physical shared channel is a PUSCH, and the first DCI is a DCI format 0_0.

[0367] It should be noted that the apparatus provided in the above embodiments, in realizing its functions, only takes the above-mentioned division of each functional module as an example, and in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above-described functions. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

[0368] Figure 9 A block diagram of a TCI state determination apparatus provided by one example embodiment of the present application is shown, see Figure 9 The apparatus includes:

[0369] The sending module 901 is configured to send a first DCI to a terminal, the first DCI being used to indicate a transmission resource of a physical shared channel, and the terminal being configured to determine at least one first TCI state corresponding to the physical shared channel.

[0370] In some embodiments, the at least one first TCI state is determined based on a TCI state corresponding to a control resource set.

[0371] In some embodiments, the control resource set is a control resource set used to send the first DCI, or the control resource set is CORESET#0.

[0372] In some embodiments, in the case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

[0373] Or,

[0374] In the case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one TCI state of the multiple TCI states corresponding to the control resource set.

[0375] Or,

[0376] In the case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set.

[0377] In some embodiments, the sending module 901 is further configured to send, to the terminal, first indication information, where the first indication information is used to indicate N TCI states, the TCI states include at least one of joint TCI states, uplink TCI states and downlink TCI states, the TCI states corresponding to the control resource set are a subset of the N TCI states, and N is a positive integer.

[0378] In some embodiments, the N TCI states include multiple joint TCI states and / or downlink TCI states; and the sending module 901 is further configured to send, to the terminal, second indication information.

[0379] The second indication information is used to indicate that the control resource set corresponds to at least one TCI state in the N TCI states.

[0380] Alternatively,

[0381] The second indication information is used to indicate that a control resource set group corresponding to the control resource set corresponds to at least one TCI state in the N TCI states.

[0382] In some embodiments, the second indication information is indicated by at least one of RRC and a first MAC CE.

[0383] In some embodiments, the N TCI states include multiple joint TCI states and / or downlink TCI states.

[0384] The TCI states corresponding to the control resource set are at least one TCI state in the N TCI states by default.

[0385] Alternatively,

[0386] The TCI states corresponding to the control resource set group corresponding to the control resource set are at least one TCI state in the N TCI states by default.

[0387] In some embodiments, the sending module is further configured to send, to the terminal, a second MAC CE, where the second MAC CE is used to indicate the TCI states corresponding to the control resource set.

[0388] In some embodiments, the sending module 901 is further configured to send, to the terminal, third indication information, where the third indication information is used to indicate N TCI states, the TCI states include at least one of joint TCI states, uplink TCI states and downlink TCI states.

[0389] The at least one first TCI state is determined based on the N TCI states.

[0390] In some embodiments, the at least one first TCI state is at least one TCI state of the N TCI states.

[0391] In some embodiments, the sending module 901 is further configured to send fourth indication information to the terminal, the fourth indication information being used to indicate at least one TCI state of the N TCI states.

[0392] The at least one first TCI state is at least one TCI state of the N TCI states indicated by the fourth indication information.

[0393] In some embodiments, the fourth indication information is indicated by at least one of RRC, MAC CE and DCI.

[0394] In some embodiments, the fourth indication information is indicated by the DCI, the DCI being DCI format 1_1 or DCI format 1_2.

[0395] Or,

[0396] The DCI is DCI format 0_1 or DCI format 0_2.

[0397] In some embodiments, the N TCI states comprise QCL indications for at least one of PDCCH, PDSCH, PUCCH, PUSCH, CSI-RS and SRS.

[0398] In some embodiments, the first indication information and / or the third indication information is carried in a third MAC CE, the third MAC CE being used to indicate the N TCI states; or,

[0399] The first indication information and / or the third indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE being used to indicate that at least two code points in a transmission configuration indication TCI field of the second DCI respectively correspond to the N TCI states, and the second DCI being used to indicate one code point of the at least two code points.

[0400] In some embodiments, the first DCI is not used to indicate the at least one first TCI state.

[0401] In some embodiments, the physical shared channel comprises at least one of PDSCH and PUSCH.

[0402] In some embodiments, the physical shared channel is a PDSCH, and the first DCI is a DCI format 1_0; and / or the physical shared channel is a PUSCH, and the first DCI is a DCI format 0_0.

[0403] It should be noted that the apparatus provided in the above embodiments, when realizing its functions, only takes the above-mentioned division of each functional module as an example, and in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above-described functions. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be described here.

[0404] Figure 10 A structural schematic diagram of a communication device provided in an example embodiment of the present application is shown, which includes a processor 1001, a receiver 1002, a transmitter 1003, a memory 1004 and a bus 1005.

[0405] The processor 1001 includes one or more processing cores. The processor 1001 performs various functional applications and information processing by running software programs and modules.

[0406] The receiver 1002 and the transmitter 1003 can be implemented as a communication component, which can be a communication chip.

[0407] The memory 1004 is connected to the processor 1001 through the bus 1005.

[0408] The memory 1004 can be used to store at least one program code, and the processor 1001 is configured to execute the at least one program code to implement each step in the above method embodiments.

[0409] In addition, the communication device can be a terminal or a network device. The memory 1004 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: a magnetic or optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic storage, a flash memory, a programmable read-only memory (PROM).

[0410] In an example embodiment, a computer readable storage medium is also provided, and the readable storage medium stores executable program codes, which are loaded and executed by a processor to implement the TCI state determination method performed by the communication device provided in each method embodiment described above.

[0411] In an example embodiment, a chip is provided, which comprises programmable logic circuit and / or program instructions, when the chip is executed on a terminal or a network device, for implementing the TCI state determination method provided by each method embodiment.

[0412] In an example embodiment, a communication system is provided, which comprises a terminal and a network device, the terminal is configured to implement the TCI state determination method as described above, and the network device is configured to implement the TCI state determination method as described above.

[0413] In an example embodiment, a computer program product is provided, when the computer program product is executed by a processor of a terminal or a network device, for implementing the TCI state determination method provided by each method embodiment.

[0414] A person of ordinary skill in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructions to instruct related hardware, and the program can be stored in a computer readable storage medium, and the storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0415] The above only describes optional embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for TCI state determination, the method comprising: The method is performed by a terminal, and the method comprises: receiving first downlink control information (DCI) sent by a network device, the first DCI being used for indicating a transmission resource of a physical shared channel; determining at least one first TCI state corresponding to the physical shared channel; wherein the at least one first TCI state is determined based on a TCI state corresponding to a control resource set; in a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one of the multiple TCI states corresponding to the control resource set; or, in a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set. Or, the at least one first TCI state is determined based on N TCI states indicated by indication information sent by the network device, in a case where the N TCI states include multiple TCI states, the at least one first TCI state is one of the multiple TCI states, N being a positive integer.

2. The method of claim 1, wherein, The control resource set is a control resource set used for sending the first DCI, or the control resource set is CORESET #0.

3. The method of claim 1, wherein, The method further comprises: in a case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

4. The method of claim 1, wherein, The method further comprises: receiving first indication information sent by the network device, the first indication information being used for indicating N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states, a TCI state corresponding to the control resource set being a subset of the N TCI states, N being a positive integer.

5. The method of claim 4, wherein, The N TCI states include multiple joint TCI states and / or downlink TCI states; the method further comprises: receiving second indication information sent by the network device; the second indication information being used for indicating that the control resource set corresponds to at least one TCI state of the N TCI states. Or, the second indication information being used for indicating that a control resource set group corresponding to the control resource set corresponds to at least one TCI state of the N TCI states.

6. The method of claim 5, wherein, The second indication information is indicated by at least one of radio resource control (RRC) and a first medium access control (MAC) control element (CE).

7. The method of claim 4, wherein, The N TCI states include multiple joint TCI states and / or downlink TCI states; the method further comprises: defaulting at least one TCI state of the N TCI states as the TCI state corresponding to the control resource set; Or, defaulting at least one TCI state of the N TCI states as a TCI state corresponding to a control resource set group corresponding to the control resource set.

8. The method of claim 1, wherein, The method further comprises: receiving a second MAC CE sent by the network device, the second MAC CE being used for indicating the TCI state corresponding to the control resource set.

9. The method of claim 1, wherein, The method further comprises: receive third indication information sent by the network device, the third indication information being used to indicate N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states; the determining the at least one first TCI state corresponding to the physical shared channel comprises: determining the at least one first TCI state based on the N TCI states.

10. The method of claim 9, wherein, the determining the at least one first TCI state based on the N TCI states comprises: defaulting at least one TCI state in the N TCI states as the at least one first TCI state.

11. The method of claim 9, wherein, the method further comprises: receiving fourth indication information sent by the network device, the fourth indication information being used to indicate at least one TCI state in the N TCI states; the determining the at least one first TCI state based on the N TCI states comprises: defaulting at least one TCI state in the N TCI states as the at least one first TCI state.

12. The method of claim 11, wherein, the fourth indication information is indicated by at least one of RRC, MAC CE and DCI.

13. The method of claim 12, wherein, the fourth indication information is indicated by the DCI; the DCI is DCI format 1_1 or DCI format 1_2; or, the DCI is DCI format 0_1 or DCI format 0_2.

14. The method of claim 4 or 9, wherein, the N TCI states include quasi co-location (QCL) indication for at least one of physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), channel state information reference signal (CSI-RS) and sounding reference signal (SRS).

15. The method of claim 4 or 9, wherein, the first indication information and / or the third indication information is carried in a third MAC CE, the third MAC CE being used to indicate the N TCI states; or, the first indication information and / or the third indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE being used to indicate that N TCI states corresponding to at least two code points in a transmission configuration indication (TCI) field of the second DCI respectively, and the second DCI being used to indicate one code point in the at least two code points.

16. The method according to any one of claims 1 to 13, characterized in that, the first DCI is not used to indicate the at least one first TCI state.

17. The method of any one of claims 1 to 13, wherein, the physical shared channel includes at least one of PDSCH and PUSCH.

18. The method of claim 17, wherein, when the physical shared channel is PDSCH, the first DCI is DCI format 1_0; and / or, when the physical shared channel is PUSCH, the first DCI is DCI format 0_0.

19. A method of TCI state determination, the method comprising: the method is performed by a network device, and the method comprises: sending, to a terminal, a first DCI, the first DCI being used to indicate transmission resources of a physical shared channel, the terminal being used to determine at least one first TCI state corresponding to the physical shared channel; The at least one first TCI state is determined based on a TCI state corresponding to a control resource set; in a case where the control resource set corresponds to a plurality of TCI states, the at least one first TCI state is one of the plurality of TCI states corresponding to the control resource set; or, in a case where the control resource set corresponds to a plurality of TCI states, the at least one first TCI state is the plurality of TCI states corresponding to the control resource set. Or, the at least one first TCI state is determined based on N TCI states indicated by indication information sent by the network device, and in a case where the N TCI states include a plurality of TCI states, the at least one first TCI state is one of the plurality of TCI states, N being a positive integer.

20. The method of claim 19, wherein, The control resource set is a control resource set used for sending the first DCI, or the control resource set is CORESET #0.

21. The method of claim 19, wherein, in a case where the control resource set corresponds to one TCI state, the at least one first TCI state is the one TCI state corresponding to the control resource set.

22. The method of claim 19, wherein, The method further comprises: sending, to the terminal, first indication information, the first indication information being used to indicate N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states, a TCI state corresponding to the control resource set being a subset of the N TCI states, N being a positive integer.

23. The method of claim 22, wherein, The N TCI states include a plurality of joint TCI states and / or downlink TCI states; the method further comprises: sending, to the terminal, second indication information; the second indication information being used to indicate at least one TCI state of the N TCI states corresponding to the control resource set; Or, the second indication information being used to indicate at least one TCI state of the N TCI states corresponding to a control resource set group corresponding to the control resource set.

24. The method of claim 23, wherein, The second indication information is indicated by at least one of RRC and first MAC CE.

25. The method of claim 22, wherein, The N TCI states include a plurality of joint TCI states and / or downlink TCI states; a TCI state corresponding to the control resource set is at least one of the N TCI states by default; Or, a TCI state corresponding to a control resource set group corresponding to the control resource set is at least one of the N TCI states by default.

26. The method of claim 19, wherein, The method further comprises: sending, to the terminal, a second MAC CE, the second MAC CE being used to indicate the TCI state corresponding to the control resource set.

27. The method of claim 19, wherein, The method further comprises: sending, to the terminal, third indication information, the third indication information being used to indicate N TCI states, the TCI states including at least one of joint TCI states, uplink TCI states and downlink TCI states; the at least one first TCI state is determined based on the N TCI states.

28. The method of claim 27, wherein, The at least one first TCI state is at least one TCI state of the N TCI states.

29. The method of claim 27, wherein, The method further includes: sending fourth indication information to the terminal, the fourth indication information being used to indicate at least one TCI state of the N TCI states; The at least one first TCI state is at least one TCI state of the N TCI states indicated by the fourth indication information.

30. The method of claim 29, wherein, The fourth indication information is indicated by at least one of RRC, MAC CE and DCI.

31. The method of claim 30, wherein, The fourth indication information is indicated by the DCI; The DCI is DCI format 1_1 or DCI format 1_2; Or, The DCI is DCI format 0_1 or DCI format 0_2.

32. The method of claim 22 or 27, wherein, The N TCI states include quasi co-location (QCL) indication for at least one of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a channel state information reference signal (CSI-RS), and a sounding reference signal (SRS).

33. The method of claim 22 or 27, wherein The first indication information and / or the third indication information is carried in a third MAC CE, and the third MAC CE is used to indicate the N TCI states; or The first indication information and / or the third indication information is carried in a fourth MAC CE and a second DCI, the fourth MAC CE is used to indicate that at least two code points in a transmission configuration indication (TCI) field of the second DCI correspond to the N TCI states respectively, and the second DCI is used to indicate one of the at least two code points.

34. The method of any one of claims 19 to 31, wherein, The first DCI is not used to indicate the at least one first TCI state.

35. The method of any one of claims 19 to 31, wherein, The physical shared channel includes at least one of a PDSCH and a PUSCH.

36. The method of claim 35, wherein, The physical shared channel is a PDSCH, and the first DCI is DCI format 1_0; and / or The physical shared channel is a PUSCH, and the first DCI is DCI format 0_0.

37. A TCI state determination apparatus, comprising: The apparatus includes: a receiving module configured to receive a first downlink control information (DCI) sent by a network device, the first DCI being used to indicate a transmission resource of a physical shared channel; a determining module configured to determine at least one first TCI state corresponding to the physical shared channel; The at least one first TCI state is determined based on a TCI state corresponding to a control resource set; in a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is one of the multiple TCI states corresponding to the control resource set; or in a case where the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set; Or, the at least one first TCI state is determined based on N TCI states indicated by indication information sent by the network device, when the N TCI states include multiple TCI states, the at least one first TCI state is one of the multiple TCI states, and N is a positive integer.

38. A TCI state determination device, characterized in that, The apparatus includes The sending module is configured to send, to a terminal, first DCI used for indicating transmission resources of a physical shared channel, the terminal being configured to determine at least one first TCI state corresponding to the physical shared channel. The at least one first TCI state is determined based on a TCI state corresponding to a control resource set; when the control resource set corresponds to multiple TCI states, the at least one first TCI state is one of the multiple TCI states corresponding to the control resource set; or, when the control resource set corresponds to multiple TCI states, the at least one first TCI state is the multiple TCI states corresponding to the control resource set. Or, the at least one first TCI state is determined based on N TCI states indicated by indication information sent by the network device, when the N TCI states include multiple TCI states, the at least one first TCI state is one of the multiple TCI states, and N is a positive integer.

39. A terminal, characterized by The terminal includes A processor A transceiver connected to the processor The processor is configured to load and execute executable instructions to implement the TCI state determination method according to any one of claims 1 to 18.

40. A network device, comprising: The network device includes A processor A transceiver connected to the processor The processor is configured to load and execute executable instructions to implement the TCI state determination method according to any one of claims 19 to 36.

41. A communication system, characterized by The communication system includes a terminal configured to implement the TCI state determination method according to any one of claims 1 to 18, and a network device configured to implement the TCI state determination method according to any one of claims 19 to 36.

42. A computer-readable storage medium, characterized in that, The readable storage medium stores executable program code, which is loaded and executed by the processor to implement the TCI state determination method according to any one of claims 1 to 36.

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