Method, apparatus, and storage medium for determining transmission configuration indication status

Abstract

The present disclosure relates to a method, apparatus, and storage medium for determining a transmission configuration indication state, belonging to the field of communication technologies, and is used to enable a terminal and a network device to perform transmission using a consistent TCI state, thereby improving the signal quality of M-TRP transmission based on the TCI state. The method includes: receiving first information sent by a network device, where the first information is used for the terminal to determine that the transmission mode used for physical downlink control channel PDCCH transmission is a single-frequency network SFN transmission mode; receiving second information sent by the network device, where the second information is used for the terminal to determine the association relationship between a first control resource set and at least two transmission configuration indication TCI states.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a method, apparatus, and storage medium for determining a Transmission Configuration Indicator (TCI) state. Background Art

[0002] In New Radio (NR), for example, when the communication frequency band is in frequency range 2, due to the fast attenuation of high-frequency channels, beam-based transmission and reception need to be used to ensure the coverage range.

[0003] In related technologies, to reduce signaling overhead, the use of a unified Transmission Configuration Indicator (unified TCI) state is introduced. The unified TCI state can be indicated separately for uplink and downlink, or jointly for uplink and downlink. That is, if a network device indicates a TCI state for downlink, then the TCI state can be applicable to the Physical Downlink Shared Channel (PDSCH) and / or its corresponding DMRS, and at least a part of the Physical Downlink Control Channel (PDCCH) and / or its corresponding DMRS, and at least a part of the Channel State Information-Reference Signal (CSI-RS) of a terminal. If a network device indicates a TCI state for uplink, then the TCI state can be applicable to the Physical Uplink Shared Channel (PUSCH) and / or its corresponding DMRS, and at least a part of the Physical Uplink Control Channel (PUCCH) and / or its corresponding DMRS, and a part of the Sounding Reference Signal (SRS). If a network device indicates a joint TCI state, then the joint TCI state can be applicable to both uplink and downlink channels and / or reference signals simultaneously.

[0004] Related technologies are only applicable to the case of a Single Transmission Reception Point (S-TRP). Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides a method, an apparatus, and a storage medium for determining a transmission configuration indication state.

[0006] According to the first aspect of the embodiments of the present disclosure, a method for determining a transmission configuration indication state is provided, which is applied to a terminal. The method includes: receiving first information sent by a network device, where the first information is used for the terminal to determine that the transmission mode used for physical downlink control channel (PDCCH) transmission is a single-frequency network (SFN) transmission mode; receiving second information sent by the network device, where the second information is used for the terminal to determine the association relationship between a first control resource set and at least two transmission configuration indication (TCI) states.

[0007] In one implementation, the method further includes: receiving third information sent by the network device, where the third information is used to indicate at least one TCI state; based on the at least one TCI state, determining whether to monitor the PDCCH candidate resources of the first control resource set; and / or, based on the at least one TCI state, determining one or more TCI states corresponding to the PDCCH candidate resources monitored for the first control resource set.

[0008] In one implementation, the TCI state indicated by the third information is one TCI state; the determining whether to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state includes: based on the one TCI state, determining to stop monitoring the PDCCH candidate resources of the first control resource set.

[0009] In one implementation, the determining one or more TCI states corresponding to the PDCCH candidate resources monitored for the first control resource set based on the at least one TCI state includes: based on the at least one TCI state indicated by the third information, monitoring the PDCCH candidate resources of the first control resource set.

[0010] In one implementation, the TCI state indicated by the third information is multiple TCI states; the monitoring the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information includes: based on the multiple TCI states, monitoring the PDCCH candidate resources of the first control resource set.

[0011] In one implementation, the TCI state indicated by the third information is one TCI state; the monitoring the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information includes: based on the one TCI state, monitoring the PDCCH candidate resources of the first control resource set.

[0012] In one implementation, the TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using; monitoring the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the third information includes: monitoring the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state.

[0013] In one implementation, the second information indicates the association relationship between the first control resource set and at least two transmission configuration indication (TCI) states in at least one of the following manners: indicating at least two TCI states corresponding to the first control resource set; indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0014] In one implementation, the second information includes at least one of the following:

[0015] Radio Resource Control (RRC) signaling;

[0016] Medium Access Control Control Element (MAC-CE);

[0017] Downlink Control Information (DCI).

[0018] In one implementation, the third information includes at least one of the following:

[0019] MAC-CE;

[0020] DCI.

[0021] In one implementation, the MAC-CE is used to indicate at least one TCI state, and the at least one TCI state corresponds to a code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0022] In one implementation, at least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non - zero power (NZP) channel state information reference signal (CSI - RS); and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0023] In one implementation, the TCI state includes an uplink - downlink combined TCI state, and / or a downlink TCI state.

[0024] According to the second aspect of the embodiments of the present disclosure, a method for determining a transmission configuration indication state is provided, which is applied to a network device. The method includes: sending first information to a terminal, where the first information is used to indicate that the transmission mode used by the terminal for physical downlink control channel (PDCCH) transmission is a single - frequency network (SFN) transmission mode; sending second information to the terminal, where the second information is used to indicate that a first control resource set is associated with at least two transmission configuration indication (TCI) states.

[0025] In one implementation, the method further includes: sending third information to the terminal, where the third information is used to indicate at least one TCI state, and the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal for the first control resource set.

[0026] In one implementation, the TCI state indicated by the third information is one TCI state, and the one TCI state is used to indicate that the terminal stops monitoring the PDCCH candidate resources of the first control resource set.

[0027] In one implementation, the at least one TCI state indicated by the third information is used to indicate that the terminal monitors the PDCCH candidate resources in the first control resource set.

[0028] In one implementation, the TCI states indicated by the third information are multiple TCI states, and the multiple TCI states are used to indicate that the terminal monitors the PDCCH candidate resources of the first control resource set.

[0029] In one implementation, the TCI state indicated by the third information is a single TCI state, and the single TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0030] In one implementation, the TCI states indicated by the third information include a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using; the first TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0031] In one implementation, the second information indicates the mapping relationship between the first control resource set and at least two transmission configuration indication (TCI) states in at least one of the following manners:

[0032] Indicating at least two TCI states corresponding to the first control resource set;

[0033] Indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0034] In one implementation, the second information includes at least one of the following:

[0035] Radio Resource Control (RRC) signaling;

[0036] Medium Access Control Control Element (MAC-CE);

[0037] Downlink Control Information (DCI).

[0038] In one implementation, the third information includes at least one of the following:

[0039] MAC-CE;

[0040] DCI.

[0041] In one implementation, the MAC-CE is used to indicate at least one TCI state corresponding to one code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0042] In one implementation, at least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non - zero power (NZP) channel state information reference signal (CSI - RS); and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0043] In one implementation, the TCI state includes an uplink - downlink combined TCI state, and / or a downlink TCI state.

[0044] According to the third aspect of the embodiments of the present disclosure, there is provided a determination device for transmission configuration indication state, which is applied to a terminal. The device includes:

[0045] A receiving module, configured to receive first information sent by a network device, where the first information is used for the terminal to determine that the transmission mode used for physical downlink control channel (PDCCH) transmission is a single - frequency network (SFN) transmission mode;

[0046] The receiving module is further configured to receive second information sent by the network device, where the second information is used for the terminal to determine that a first control resource set is associated with at least two transmission configuration indication (TCI) states.

[0047] In one implementation, the receiving module is configured to receive third information sent by the network device, where the third information is used to indicate at least one TCI state; a processing module is configured to determine whether to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state; and / or, determine one or more TCI states corresponding to the PDCCH candidate resources of the first control resource set based on the at least one TCI state.

[0048] In one implementation, the TCI state indicated by the third information is one TCI state; the processing module is configured to determine to stop monitoring the PDCCH candidate resources of the first control resource set based on the one TCI state.

[0049] In one implementation, the processing module is configured to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the third information.

[0050] In one implementation, the TCI states indicated by the third information are multiple TCI states; the processing module is configured to monitor the PDCCH candidate resources of the first control resource set based on the multiple TCI states.

[0051] In one implementation, the TCI state indicated by the third information is one TCI state; the processing module is configured to monitor the PDCCH candidate resources of the first control resource set based on the one TCI state.

[0052] In one implementation, the TCI states indicated by the third information include a first TCI state, where the first TCI state is an update of a second TCI state among the second TCI state and the third TCI state that the terminal is currently using; the processing module is configured to monitor the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state.

[0053] In one implementation, the second information indicates the association relationship between the first control resource set and at least two transmission configuration indication (TCI) states in at least one of the following ways: indicating at least two TCI states corresponding to the first control resource set; indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0054] In one implementation, the second information includes at least one of the following:

[0055] Radio Resource Control (RRC) signaling;

[0056] Medium Access Control Control Element (MAC-CE);

[0057] Downlink Control Information (DCI).

[0058] In one implementation, the third information includes at least one of the following:

[0059] MAC-CE;

[0060] DCI.

[0061] In one implementation, the MAC-CE is used to indicate at least one TCI state, where the at least one TCI state corresponds to one code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0062] In one implementation, at least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non - zero power (NZP) channel state information reference signal (CSI - RS); and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0063] In one implementation, the TCI state includes an uplink - downlink combined TCI state, and / or a downlink TCI state.

[0064] According to the fourth aspect of the embodiments of the present disclosure, there is provided a determining device for a transmission configuration indication state, which is applied to a network device. The device includes: a sending module, configured to send first information to a terminal, where the first information is used to indicate that the transmission mode used by the terminal for physical downlink control channel (PDCCH) transmission is a single - frequency network (SFN) transmission mode;

[0065] The sending module is further configured to send second information to the terminal, where the second information is used to indicate that a first control resource set is associated with at least two transmission configuration indication (TCI) states.

[0066] In one implementation, the sending module is configured to send third information to the terminal, where the third information is used to indicate at least one TCI state, and the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal for the first control resource set.

[0067] In one implementation, the TCI state indicated by the third information is one TCI state, and the one TCI state is used to indicate that the terminal stops monitoring the PDCCH candidate resources of the first control resource set.

[0068] In one implementation, the at least one TCI state indicated by the third information is used to indicate that the terminal monitors the PDCCH candidate resources in the first control resource set.

[0069] In one implementation, the TCI state indicated by the third information is multiple TCI states, and the multiple TCI states are used to indicate that the terminal monitors the PDCCH candidate resources of the first control resource set.

[0070] In one implementation, the TCI state indicated by the third information is a TCI state, and the one TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0071] In one implementation, the TCI states indicated by the third information include a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using; the first TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0072] In one implementation, the second information indicates the mapping relationship between the first control resource set and at least two transmission configuration indication (TCI) states in at least one of the following manners:

[0073] Indicating at least two TCI states corresponding to the first control resource set;

[0074] Indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0075] In one implementation, the second information includes at least one of the following:

[0076] Radio Resource Control (RRC) signaling;

[0077] Medium Access Control Control Element (MAC-CE);

[0078] Downlink Control Information (DCI).

[0079] In one implementation, the third information includes at least one of the following:

[0080] MAC-CE;

[0081] DCI.

[0082] In one implementation, the MAC-CE is used to indicate at least one TCI state, and the at least one TCI state corresponds to a code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0083] In one implementation, at least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non - zero power (NZP) channel state information reference signal (CSI - RS); and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0084] In one implementation, the TCI state includes an uplink - downlink combined TCI state and / or a downlink TCI state.

[0085] According to the fifth aspect of the embodiments of the present disclosure, there is provided a determination device for a transmission configuration indication state, including: a processor; a memory for storing processor - executable instructions; wherein, the processor is configured to: execute the method described in the first aspect and any of its implementations above.

[0086] According to the sixth aspect of the embodiments of the present disclosure, there is provided a determination device for a transmission configuration indication state, including: a processor; a memory for storing processor - executable instructions; wherein, the processor is configured to: execute the method described in the second aspect and any of its implementations above.

[0087] According to the seventh aspect of the embodiments of the present disclosure, there is provided a storage medium, in which instructions are stored, and when the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect and any of its implementations above.

[0088] According to the eighth aspect of the embodiments of the present disclosure, there is provided a storage medium, in which instructions are stored, and when the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the method described in the second aspect and any of its implementations above.

[0089] According to the ninth aspect of the embodiments of the present disclosure, there is provided a communication system, including a terminal and a network device, wherein, the first terminal device is used to execute the method described in the first aspect and any of its implementations above; the second terminal device is used to execute the method described in the second aspect and any of its implementations above.

[0090] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: When the terminal determines that the transmission mode used for physical downlink control channel (PDCCH) transmission is the system frame number (SFN) transmission mode based on the first information sent by the network device, the association relationship between the first control resource set and at least two transmission configuration indicator (TCI) states is determined based on the second information sent by the network device. Thus, since both the terminal and the network device can determine at least two TCI states associated with the first control resource set, further, the terminal and the network device can use consistent TCI states for PDCCH transmission, improving the signal quality of multi-transmission and reception points (M-TRP) transmission based on TCI states.

[0091] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and should not limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] The accompanying drawings are incorporated herein and constitute a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, serving to explain the principles of the present disclosure.

[0093] Figure 1 is a schematic diagram of a wireless communication system shown according to an exemplary embodiment.

[0094] Figure 2 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0095] Figure 3 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0096] Figure 4 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0097] Figure 5 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0098] Figure 6 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0099] Figure 7 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0100] Figure 8 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0101] Figure 9 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0102] Figure 10 It is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0103] Figure 11 It is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment.

[0104] Figure 12 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment.

[0105] Figure 13 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment.

[0106] Figure 14 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment.

[0107] Figure 15 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment. Detailed implementation manners

[0108] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure.

[0109] In the New Radio (NR) technology, for example, when the communication frequency band is in frequency range 2, due to the relatively fast attenuation of high-frequency channels, in order to ensure the coverage range, beam-based transmission and reception need to be used.

[0110] In the related art, to reduce signaling overhead, the use of a unified transmission configuration indicator (unified TCI state) is introduced. The unified TCI state can be indicated separately for the uplink and downlink, or jointly for the uplink and downlink. That is, if a network device indicates a TCI state for the downlink, then the TCI state can be applicable to the physical downlink shared channel (PDSCH) of a terminal and / or its corresponding DMRS, and at least a part of the physical downlink control channel (PDCCH) and / or its corresponding DMRS, and at least a part of the channel state information-reference signal (CSI-RS). If a network device indicates a TCI state for the uplink, then the TCI state can be applicable to the physical uplink shared channel (PUSCH) of a terminal and / or its corresponding DMRS, and at least a part of the physical uplink control channel (PUCCH) and / or its corresponding DMRS, and at least a part of the sounding reference signal (SRS). If a network device indicates a joint TCI state, then the joint TCI state can be applicable to both the uplink and downlink channels and / or reference signals simultaneously.

[0111] The related art is only applicable to the case of a single transmission reception point (S-TRP).

[0112] The inventors noticed that in a multi transmission reception point (M-TRP) scenario, for two search space sets (SS sets) configured with a link relationship, when multiple TCI states are indicated, each of the two search space sets can adopt a TCI state. However, when only one TCI state is indicated, how to monitor the PDCCH candidate sets within the two search space sets configured with a link relationship is a problem that needs to be solved.

[0113] The method for determining the TCI state provided by the embodiments of the present disclosure can be applied to Figure 1 the wireless communication system shown in. Refer toFigure 1 As shown, the wireless communication system includes a network device and a terminal. The terminal is connected to the network device through wireless resources and conducts data transmission.

[0114] It can be understood that Figure 1 the wireless communication system shown is only for illustrative purposes. The wireless communication system may further include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices, etc., which are not drawn in Figure 1 this figure. The embodiments of the present disclosure do not limit the number of network devices and terminals included in the wireless communication system.

[0115] Furthermore, it can be understood that the wireless communication system in the embodiments of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single Carrier FDMA (SC-FDMA), Carrier Sense Multiple Access with Collision Avoidance. According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (generation) networks, 3G networks, 4G networks, or future evolved networks, such as 5G networks. 5G networks can also be referred to as New Radio (NR). For the convenience of description, the wireless communication network is sometimes simply referred to as the network in the present disclosure.

[0116] Further, the network device involved in the present disclosure may also be referred to as a radio access network device. The radio access network device may be: a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc. It may also be a gNB in an NR system, or it may also be a component or a part of a device that constitutes a base station. It should be understood that in the embodiments of the present disclosure, the specific technologies and specific device forms adopted by the network device are not limited. In the present disclosure, the network device may provide communication coverage for a specific geographical area and may communicate with terminals located within the coverage area (cell). In addition, when it is a vehicle-to-everything (V2X) communication system, the network device may also be a vehicle-mounted device.

[0117] Further, the terminal involved in the present disclosure may also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. It is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a smart phone, a customer premise equipment (CPE), a pocket personal computer (PPC), a palm computer, a personal digital assistant (PDA), a notebook computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technologies and specific device forms adopted by the terminal.

[0118] In the New Radio (NR) technology, for example, when the communication frequency band is in frequency range 2, due to the relatively fast attenuation of high-frequency channels, beam-based transmission and reception need to be used to ensure the coverage range.

[0119] In the related art, the beams used for PDCCH and / or DMRS of PDCCH, PDSCH and / or DMRS of PDSCH, PUCCH and / or DMRS of PUCCH, PUSCH and / or DMRS of PUSCH, and / or reference signals, etc. are all independently indicated. Among them, the reference signals may include CSI-RS, SRS, positioning reference signal (PRS), tracking reference signal (TRS), and so on. For example, CSI-RS may include CSI-RS for channel state information measurement, CSI-RS for beam measurement, or CSI-RS for path loss estimation. SRS may include SRS for channel state information measurement based on a codebook or non-codebook, SRS for beam measurement, or SRS for positioning measurement.

[0120] Generally, PDCCH and / or DMRS of PDCCH, and PUCCH and / or DMRS of PUCCH activate a beam respectively through MACCE, while PDSCH and / or DMRS of PDSCH, and PUSCH and / or DMRS of PUSCH indicate their respective corresponding beams respectively through DCI signaling.

[0121] The beam here can be indicated by TCI state or spatialrelationinfo (spatial relationship). The TCI state corresponding to PDCCH includes the TCI state corresponding to PDCCH and / or its DMRS, that is, this TCI state is used for the reception of PDCCH and / or its DMRS. Similarly, the TCI state corresponding to PDSCH includes the TCI state corresponding to PDSCH and / or its DMRS, that is, this TCI state is used for the reception of PDSCH and / or its DMRS; the TCI state or spatialrelationinfo corresponding to PUCCH includes the TCI state or spatialrelationinfo corresponding to PUCCH and / or its DMRS, that is, this TCI state or spatialrelationinfo is used for the transmission of PUCCH and / or its DMRS; the TCI state or spatialrelationinfo corresponding to PUSCH includes the TCI state or spatialrelationinfo corresponding to PUSCH and / or its DMRS, that is, this TCI state or spatialrelationinfo is used for the transmission of PUSCH and / or its DMRS.

[0122] Further, to reduce signaling overhead, in another related art, the use of unified Transmission Configuration Indicator (unified TCI state) is introduced. The unified TCI state can be indicated separately for the uplink and the downlink, or jointly for the uplink and the downlink. That is, if a network device indicates a TCI state for the downlink (DL TCI state), then this TCI state can be applied to the Physical Downlink Shared Channel (PDSCH) and / or its corresponding DMRS of the terminal, and at least a part of the Physical Downlink Control Channel (PDCCH), and a part of the Channel State Information-Reference Signal (CSI-RS). If a network device indicates a TCI state for the uplink (UL TCI state), then this TCI state can be applied to the Physical Uplink Shared Channel (PUSCH) and / or its corresponding DMRS of the terminal, and at least a part of the Physical Uplink Control Channel (PUCCH) and / or its corresponding DMRS, and at least a part of the Sounding Reference Signal (SRS). If a network device indicates a joint TCI state (Joint TCI state), then this joint TCI state can be applied to the uplink and downlink channels / reference signals simultaneously.

[0123] However, the related art is only applicable to the case of Single Transmission Reception Point (S-TRP), and does not consider the case of Multi Transmission Reception Point (M-TRP).

[0124] For the transmission mode with PDCCH configured as the single frequency network (SFN) transmission mode, since the SFN transmission mode refers to the transmission from the M-TRP, each TRP sends the same signal on the same resources, that is, the PDCCH uses the quasi-co-location (QCL) assumption of multiple TCI states for transmission on the same time-domain resources, frequency-domain resources, and DMRS ports. For the PDCCH reception of the CORESET associated with two TCI states, when the SFN transmission mode is SFN A, the terminal directly adopts the QCL assumptions corresponding to multiple TCI states; when the SFN transmission mode is SFN B, the terminal does not adopt the Doppler shift and Doppler spread parameters in the QCL assumption corresponding to the last TCI state.

[0125] In the scenario of single DCI and M-TRP, one MAC CE and / or DCI signaling can indicate multiple TCI states. When indicating multiple TCI states, the PDCCH of the control resource set associated with two TCI states can be directly monitored using multiple TCI states. However, when only one TCI state is indicated, how to monitor the candidate resources of the PDCCH of the control resource set associated with two TCI states is a problem that needs to be solved.

[0126] Based on this, the embodiments of the present disclosure provide a method for determining TCI. When the terminal determines that the transmission mode used for PDCCH transmission is the SFN transmission mode based on the first information sent by the network device, the association relationship between the first control resource set and at least two TCI states is determined based on the second information sent by the network device. Thus, since both the terminal and the network device can determine at least two TCI states associated with the first control resource set, further, the terminal and the network device can use consistent TCI states for PDCCH transmission, improving the signal quality of M-TRP transmission based on TCI states.

[0127] It should be noted that the TCI state involved in the embodiments of the present disclosure refers to the unified TCI state unless otherwise specified.

[0128] Figure 2 is a flowchart of a method for determining TCI shown according to an exemplary embodiment. As Figure 2 shown, the method for determining TCI is used in a terminal and includes the following steps.

[0129] In step S11, the first information sent by the network device is received, and the first information is used for the terminal to determine that the transmission mode used for PDCCH transmission is the SFN transmission mode.

[0130] In step S12, the second information sent by the network device is received, and the second information is used for the terminal to determine the association relationship between the first control resource set and at least two TCI states.

[0131] In the embodiments of the present disclosure, when the terminal determines that the transmission mode used for PDCCH transmission is the SFN transmission mode based on the first information sent by the network device, the association relationship between the first control resource set and at least two TCI states is determined based on the second information sent by the network device. Thus, since both the terminal and the network device can determine at least two TCI states associated with the first control resource set, further, the terminal and the network device can use the same TCI state for PDCCH transmission, improving the signal quality of M-TRP transmission based on the TCI state.

[0132] In a method for determining a TCI state provided in the embodiments of the present disclosure, the third information sent by the network device for indicating at least one TCI state is received, and based on the third information, it is determined whether to monitor the PDCCH candidate resources of the first control resource set. As Figure 3 shown, Figure 3 is a flowchart of a method for determining a TCI according to an exemplary embodiment, including the following steps.

[0133] In step S21, the third information sent by the network device is received, and the third information is used for indicating at least one TCI state.

[0134] In step S22, based on at least one TCI state, it is determined whether to monitor the PDCCH candidate resources of the first control resource set.

[0135] In the embodiments of the present disclosure, the terminal determines the association relationship between the first control resource set and at least two TCI states. Specifically, any method can be adopted to determine the association relationship between the first control resource set and at least two TCI states; for example, the method as in steps 11 - 12 can be adopted, and the association relationship between the first control resource set and at least two TCI states indicated by the second information is used to determine the association relationship between the first control resource set and at least two TCI states, and the second information indicates the association relationship between the TCI states indicated by the third information. Of course, other methods can also be adopted to determine the association relationship between the first control resource set and at least two TCI states, and the embodiments of the present disclosure do not limit this.

[0136] In the embodiments of the present disclosure, based on at least one TCI state indicated by the network device, it is determined whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the network device. Thus, the terminal and the network device can reach an agreement on whether to monitor the control resource set, improving the signal quality of M-TRP transmission based on the TCI state.

[0137] It should be noted that steps S21 - S22 can be implemented independently or in combination with any embodiment of the present disclosure, and will not be elaborated here.

[0138] In the implementation of the present disclosure, in step S22, it is possible to determine whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state. And there are many ways to determine whether to monitor the PDCCH candidate resources of the first control resource set by based on at least one TCI state. In the embodiments of the present disclosure, the following Figures 4 - 9 multiple solutions as shown are used to illustrate these ways respectively. It should be noted that the multiple solutions as shown in the embodiments of the present disclosure Figures 4 - 9 can be implemented independently by each embodiment, or any one of the embodiments can be implemented in combination with other embodiments.

[0139] In a method for determining a TCI state provided by an embodiment of the present disclosure, based on at least one TCI state indicated by third information, on the basis of determining to monitor the PDCCH candidate resources of the first control resource set, further determine which TCI state among the at least one TCI state corresponds to the monitored PDCCH candidate resources of the first control resource set. As Figure 4 shown, Figure 4 is a flowchart of a method for determining a TCI shown according to an exemplary embodiment, including the following steps.

[0140] In step S31, receive third information sent by a network device, where the third information is used to indicate at least one TCI state.

[0141] In step S32, based on at least one TCI state, determine whether to monitor the PDCCH candidate resources of the first control resource set.

[0142] In step S33, if it is determined to monitor the PDCCH candidate resources of the first control resource set, then based on at least one TCI state, determine one or more TCI states corresponding to the monitored PDCCH candidate resources of the first control resource set.

[0143] In the embodiments of the present disclosure, based on the third information sent by the network device, determine at least one TCI indicated by the third information, and based on at least one TCI state, determine whether to monitor the PDCCH candidate resources of the first control resource set. If it is determined to monitor the PDCCH candidate resources of the first control resource set, then based on at least one TCI state, determine one or more TCI states corresponding to the monitored PDCCH candidate resources of the first control resource set. Thus, the terminal and the network device can use the same TCI state for transmission, improving the signal quality of M - TRP transmission based on the TCI state.

[0144] Next, it is described how to determine whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the third information.

[0145] In a method for determining TCI provided in an embodiment of the present disclosure, in response to the TCI state indicated by the third information being one TCI state, based on one TCI state, it is determined to stop monitoring the PDCCH candidate resources of the first control resource set. As Figure 5 shown, Figure 5 is a flowchart of a method for determining TCI shown according to an exemplary embodiment, including the following steps.

[0146] In step S41, the third information sent by the network device is received, and the third information is used to indicate one TCI state.

[0147] In step S42, based on one TCI state, it is determined to stop monitoring the PDCCH candidate resources of the first control resource set.

[0148] In some embodiments, if the terminal stops monitoring the PDCCH candidate resources of the first control resource set, then the control channel elements (CCEs) corresponding to the PDCCH candidate resources of the first control resource set are not counted into the number of CCEs monitored by the terminal, or the number of CCEs corresponding to the PDCCH candidate resources of the first control resource set is 0.

[0149] In some embodiments, if the terminal stops monitoring the PDCCH candidate resources of the first control resource set, then the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is not counted into the number of blind detections monitored by the terminal, or the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 0.

[0150] In an embodiment of the present disclosure, if the third information sent by the network device indicates one TCI state, the terminal determines to stop monitoring the PDCCH candidate resources of the first control resource set, so that the terminal and the network device reach an agreement on whether to monitor the PDCCH candidate resources of the first control resource set, improving the signal quality of M-TRP transmission based on the TCI state.

[0151] In a method for determining TCI provided in an embodiment of the present disclosure, on the basis of determining to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the third information, the PDCCH candidate resources of the first control resource set are monitored based on at least one TCI state indicated by the third information. As Figure 6 shown, Figure 6 is a flowchart of a method for determining TCI shown according to an exemplary embodiment, including the following steps.

[0152] In step S51, the third information sent by the network device is received, and the third information is used to indicate at least one TCI state.

[0153] In step S52, based on at least one TCI state, it is determined whether to monitor the PDCCH candidate resources of the first control resource set.

[0154] In step S53, if it is determined to monitor the PDCCH candidate resources of the first control resource set, then based on at least one TCI state indicated by the third information, the PDCCH candidate resources of the first control resource set are monitored.

[0155] Based on the third information sent by the network device, at least one TCI indicated by the third information is determined, and based on at least one TCI, it is determined whether to monitor the PDCCH candidate resources of the first control resource set. If it is determined to monitor the PDCCH candidate resources of the first control resource set, then based on at least one TCI state indicated by the third information, the PDCCH candidate resources of the first control resource set are monitored. Thus, the terminal and the network device can use the same TCI state for transmission, improving the signal quality of M-TRP transmission based on the TCI state.

[0156] Next, how to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the third information will be described.

[0157] In a method for determining a TCI provided in an embodiment of the present disclosure, if the TCI states indicated by the third information are multiple TCI states, the terminal monitors the PDCCH candidate resources of the first control resource set based on the multiple TCI states. As Figure 7 shown, Figure 7 is a flowchart of a method for determining a TCI shown according to an exemplary embodiment, including the following steps.

[0158] In step S61, the third information sent by the network device is received, and the third information is used to indicate multiple TCI states.

[0159] In step S62, based on the multiple TCI states, the PDCCH candidate resources of the first control resource set are monitored.

[0160] In an exemplary embodiment, if the multiple TCI states indicated by the third information include a first TCI state and a second TCI state, the PDCCH candidate resources of the first control resource set are monitored based on the first TCI state and the second TCI state simultaneously.

[0161] In some embodiments, the terminal simultaneously monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the second TCI state. Then, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be counted into the number of CCEs monitored by the terminal.

[0162] In some embodiments, the terminal simultaneously monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the second TCI state. Then, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be counted into the number of blind detections monitored by the terminal. Among them, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1 or 2 or 3.

[0163] In a method for determining a TCI provided by an embodiment of the present disclosure, in response to the TCI state indicated by the third information being one TCI state, based on one TCI state, the PDCCH candidate resources of the first control resource set are monitored. As Figure 8 shown, Figure 8 is a flowchart of a method for determining a TCI shown according to an exemplary embodiment, including the following steps.

[0164] In step S71, the third information sent by the network device is received, and the third information is used to indicate one TCI state.

[0165] In step S72, based on one TCI state, the PDCCH candidate resources of the first control resource set are monitored.

[0166] In an exemplary embodiment, if the third information indicates that one TCI state includes the first TCI state, the PDCCH candidate resources of the first control resource set are monitored based on the first TCI state.

[0167] In some embodiments, the terminal monitors the PDCCH candidate resources of the first control resource set based on one TCI state. Then, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be counted into the number of CCEs monitored by the terminal.

[0168] In some embodiments, the terminal monitors the PDCCH candidate resources of the first control resource set based on one TCI state. Then, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be counted into the number of blind detections monitored by the terminal. Among them, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1.

[0169] In a method for determining a TCI provided in an embodiment of the present disclosure, in response to the TCI state indicated by the third information including a first TCI state, where the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state currently being used by the terminal; based on the first TCI state and the third TCI state, monitor the PDCCH candidate resources of the first control resource set. As Figure 9 shown, Figure 9 FIG. Figure 9 is a flowchart of a method for determining a TCI shown according to an exemplary embodiment, including the following steps.

[0170] In step S81, receive the third information sent by the network device, where the TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state currently being used by the terminal.

[0171] In step S82, based on the first TCI state and the third TCI state, monitor the PDCCH candidate resources of the first control resource set.

[0172] In some embodiments, when the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state simultaneously, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be calculated into the number of CCEs monitored by the terminal.

[0173] In some embodiments, when the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state simultaneously, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be calculated into the number of blind detections monitored by the terminal. Among them, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1 or 2 or 3.

[0174] It should be noted that the first TCI state indicated by the third information in the embodiments of the present disclosure may include one or more TCI states, and the TCI states currently being used by the terminal do not only include the second TCI state and the third TCI state. The first TCI state indicated by the third information only represents a partial update of the TCI state currently being used by the terminal, so that the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the unupdated TCI state.

[0175] In a method for determining a TCI provided in an embodiment of the present disclosure, the second information indicates the association relationship between the first control resource set and at least two TCI states in at least one of the following manners:

[0176] A. Indicate at least two TCI states corresponding to the first control resource set;

[0177] B. Indicate at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0178] In a method for determining a TCI state provided by an embodiment of the present disclosure, the second information includes at least one of the following:

[0179] Radio Resource Control signaling RRC;

[0180] Medium Access Control control element MAC-CE;

[0181] Downlink Control Information DCI.

[0182] In a method for determining a TCI state provided by an embodiment of the present disclosure, the third information includes at least one of the following:

[0183] MAC-CE;

[0184] DCI.

[0185] In an exemplary embodiment, the third information includes MAC-CE, or MAC-CE + DCI.

[0186] In a method for determining a TCI state provided by an embodiment of the present disclosure, the MAC-CE is used to indicate at least one TCI state, and at least one TCI state corresponds to a code point in the TCI state indication field carried in the DCI; or, the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0187] In a method for determining a TCI state provided by an embodiment of the present disclosure, at least one TCI state indicated by the third information is used to determine at least one of the quasi-co-location QCL assumptions of the Physical Downlink Shared Channel PDSCH, Physical Downlink Control Channel PDCCH, control resource set associated with the PDCCH, demodulation reference signal DMRS of the PDSCH and / or PDCCH, and non-zero power NZP CSI-RS; and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the DMRS and Sounding Reference Signal SRS of the Physical Uplink Control Channel PUCCH, Physical Uplink Shared Channel PUSCH, PUCCH and / or PUSCH.

[0188] In a method for determining a TCI state provided by an embodiment of the present disclosure, the TCI state includes an uplink and downlink joint TCI state, and / or a downlink TCI state DL TCI state.

[0189] Based on the same concept, the present disclosure also provides a method for determining a TCI state applied to a network device.

[0190] Figure 10 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment, as Figure 10 shown. The method for determining the TCI state is used in a network device and includes the following steps.

[0191] In step S91, a first piece of information is sent to the terminal. The first piece of information is used to indicate that the transmission mode used by the terminal for PDCCH transmission is the SFN transmission mode.

[0192] In step S92, a second piece of information is sent to the terminal. The second piece of information is used to indicate that the first control resource set is associated with at least two TCI states.

[0193] In the embodiment of the present disclosure, when the terminal determines that the transmission mode used for PDCCH transmission is the SFN transmission mode based on the first piece of information sent by the network device, the association relationship between the first control resource set and at least two TCI states is determined based on the second piece of information sent by the network device. Thus, since both the terminal and the network device can determine at least two TCI states associated with the first control resource set, further, the terminal and the network device can use consistent TCI states for PDCCH transmission, improving the signal quality of M-TRP transmission based on the TCI state.

[0194] Figure 11 is a flowchart of a method for determining a TCI state shown according to an exemplary embodiment, as Figure 9 shown, and includes the following steps.

[0195] In step S1001, a third piece of information is sent to the terminal. The third piece of information is used to indicate at least one TCI state.

[0196] Wherein, the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal for the first control resource set.

[0197] In an embodiment of the present disclosure, the terminal determines the association relationship between the first control resource set and at least two TCI states. Specifically, any method can be used to determine the association relationship between the first control resource set and at least two TCI states. For example, the method as shown in steps S91 - S92 can be adopted to determine the association relationship between the first control resource set and at least two TCI states according to the association relationship between the first control resource set indicated by the second information and at least two TCI states, where the second information indicates the association relationship with the TCI state indicated by the third information. Of course, other methods can also be used to determine the association relationship between the first control resource set and at least two TCI states, and the embodiments of the present disclosure do not limit this.

[0198] In an embodiment of the present disclosure, the association relationship between the first control resource set and at least two TCI states indicated by the second information indicates the association relationship with the TCI state indicated by the third information.

[0199] In an embodiment of the present disclosure, based on at least one TCI state indicated by the network device, it is determined whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state indicated by the network device. Thus, the terminal and the network device can reach an agreement on whether to monitor the control resource set, improving the signal quality of M-TRP transmission based on the TCI state.

[0200] It should be noted that step S81 can be implemented alone or in combination with any embodiment of the present disclosure, and will not be elaborated here.

[0201] In the implementation of the present disclosure, the terminal can determine whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state. There are many ways to determine whether to monitor the PDCCH candidate resources of the first control resource set based on at least one TCI state. In the embodiments of the present disclosure, the following multiple solutions are used to illustrate these ways respectively. It should be noted that the multiple solutions in the embodiments of the present disclosure can be implemented independently of each other, or any one of the embodiments can be implemented in combination with other embodiments.

[0202] In a method for determining a TCI state provided in an embodiment of the present disclosure, the TCI state indicated by the third information is one TCI state, and one TCI state is used to instruct the terminal to stop monitoring the PDCCH candidate resources of the first control resource set.

[0203] In some embodiments, when the terminal stops monitoring the PDCCH candidate resources of the first control resource set, the control channel elements (CCEs) corresponding to the PDCCH candidate resources of the first control resource set are not counted in the number of CCEs monitored by the terminal, or the number of CCEs corresponding to the PDCCH candidate resources of the first control resource set is 0.

[0204] In some embodiments, when the terminal stops monitoring the PDCCH candidate resources of the first control resource set, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is not counted in the number of blind detections monitored by the terminal, or the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 0.

[0205] In a method for determining a TCI state provided by an embodiment of the present disclosure, at least one TCI state indicated by third information is used to indicate that the terminal monitors the PDCCH candidate resources in the first control resource set.

[0206] In a method for determining a TCI state provided by an embodiment of the present disclosure, the TCI states indicated by the third information are multiple TCI states, and the multiple TCI states are used to indicate that the terminal monitors the PDCCH candidate resources in the first control resource set.

[0207] In some embodiments, when the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the second TCI state simultaneously, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be counted in the number of CCEs monitored by the terminal.

[0208] In some embodiments, when the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the second TCI state simultaneously, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be counted in the number of blind detections monitored by the terminal. Wherein, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1 or 2 or 3.

[0209] In a method for determining a TCI state provided by an embodiment of the present disclosure, the TCI state indicated by the third information is one TCI state, and the one TCI state is used to indicate that the terminal monitors the PDCCH candidate resources in the first control resource set.

[0210] In some embodiments, when the terminal monitors the PDCCH candidate resources of the first control resource set based on one TCI state, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be counted in the number of CCEs monitored by the terminal.

[0211] In some embodiments, the terminal monitors the PDCCH candidate resources of the first control resource set based on a TCI state. Then, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be calculated into the number of blind detections monitored by the terminal. Among them, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1.

[0212] In a method for determining a TCI state provided by an embodiment of the present disclosure, the TCI state indicated by the third information includes a first TCI state. The first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using. The first TCI state is used to indicate that the terminal monitors the PDCCH candidate resources of the first control resource set.

[0213] It should be noted that the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state simultaneously.

[0214] In some embodiments, the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state simultaneously. Then, the CCEs corresponding to the PDCCH candidate resources of the first control resource set need to be calculated into the number of CCEs monitored by the terminal.

[0215] In some embodiments, the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state simultaneously. Then, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set needs to be calculated into the number of blind detections monitored by the terminal. Among them, the number of blind detections corresponding to the PDCCH candidate resources of the first control resource set is 1 or 2 or 3.

[0216] In the embodiments of the present disclosure, the first TCI state indicated by the third information may include one or more TCI states, and the TCI states that the terminal is currently using do not only include the second TCI state and the third TCI state. The first TCI state indicated by the third information only represents a partial update of the TCI state that the terminal is currently using. Thus, the terminal monitors the PDCCH candidate resources of the first control resource set based on the first TCI state and the unupdated TCI states.

[0217] In a method for determining a TCI state provided by an embodiment of the present disclosure, the second information indicates the mapping relationship between the first control resource set and at least two TCI states in at least one of the following manners:

[0218] Indicating at least two TCI states corresponding to the first control resource set;

[0219] Indicate at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0220] In a method for determining a TCI state provided by an embodiment of the present disclosure, the second information includes at least one of the following:

[0221] Radio Resource Control signaling RRC;

[0222] Medium Access Control control element MAC-CE;

[0223] Downlink Control Information DCI.

[0224] In a method for determining a TCI state provided by an embodiment of the present disclosure, the third information includes at least one of the following:

[0225] MAC-CE;

[0226] DCI.

[0227] In an exemplary embodiment, the third information includes MAC-CE, or MAC-CE + DCI.

[0228] In a method for determining a TCI state provided by an embodiment of the present disclosure, the MAC-CE is used to indicate at least one TCI state, and the at least one TCI state corresponds to one code point in the TCI state indication field carried in the DCI; or, the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0229] In a method for determining a TCI state provided by an embodiment of the present disclosure, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of PDSCH, PDCCH, the control resource set associated with the PDCCH, the DMRS of PDSCH and / or PDCCH, and non-zero power NZP CSI-RS; and / or, at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of PUCCH, PUSCH, the DMRS of PUCCH and / or PUSCH, and SRS.

[0230] In a method for determining a TCI state provided by an embodiment of the present disclosure, the TCI state includes an uplink-downlink combined TCI state, and / or a downlink TCI state.

[0231] It should be noted that those skilled in the art can understand that the various implementation manners / embodiments involved in the embodiments of the present disclosure can be used in cooperation with the foregoing embodiments or can be used independently. Whether used alone or in cooperation with the foregoing embodiments, their implementation principles are similar. In the embodiments of the present disclosure, some embodiments are described in the implementation manner of being used together. Of course, those skilled in the art can understand that such an illustrative example does not limit the embodiments of the present disclosure.

[0232] Based on the same concept, the embodiments of the present disclosure further provide a device for determining TCI.

[0233] It can be understood that in order to implement the above functions, the device for determining TCI provided by the embodiments of the present disclosure includes the corresponding hardware structure and / or software module for executing each function. Combining the units and algorithm steps of the various examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the manner of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described function, but such an implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0234] Figure 12 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment. Refer to Figure 12 , the device includes a receiving module 101. Among them, the device 100 for determining the TCI state is applied to a terminal.

[0235] The receiving module 101 is configured to receive the first information sent by a network device, where the first information is used for the terminal to determine that the transmission mode used for PDCCH transmission is the SFN transmission mode;

[0236] The receiving module 101 is further configured to receive the second information sent by the network device, and the second information is used for the terminal to determine that the first control resource set is associated with at least two transmission configuration indication (TCI) states.

[0237] In one implementation manner, the device 100 for determining the TCI state further includes a processing module 102.

[0238] The receiving module 101 is configured to receive the third information sent by the network device, where the third information is used to indicate at least one TCI state;

[0239] A processing module 102, configured to determine whether to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state; and / or determine one or more TCI states corresponding to the PDCCH candidate resources for monitoring the first control resource set based on the at least one TCI state.

[0240] In one implementation, the TCI state indicated by the third information is one TCI state; the processing module 102 is configured to determine to stop monitoring the PDCCH candidate resources of the first control resource set based on one TCI state.

[0241] In one implementation, the processing module 102 is configured to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information.

[0242] In one implementation, the TCI state indicated by the third information is multiple TCI states; the processing module 102 is configured to monitor the PDCCH candidate resources of the first control resource set based on multiple TCI states.

[0243] In one implementation, the TCI state indicated by the third information is one TCI state; the processing module 102 is configured to monitor the PDCCH candidate resources of the first control resource set based on one TCI state.

[0244] In one implementation, the TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state currently used by the terminal; the processing module 102 is configured to monitor the PDCCH candidate resources of the first control resource set based on the first TCI state and the third TCI state.

[0245] In one implementation, the second information indicates the association relationship between the first control resource set and at least two transmission configuration indication (TCI) states in at least one of the following manners: indicating at least two TCI states corresponding to the first control resource set; indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0246] In one implementation, the second information includes at least one of the following:

[0247] Radio Resource Control (RRC) signaling;

[0248] Medium Access Control Control Element (MAC-CE);

[0249] Downlink Control Information (DCI).

[0250] In one implementation, the third information includes at least one of the following:

[0251] MAC-CE;

[0252] DCI.

[0253] In one implementation, the MAC-CE is used to indicate at least one TCI state, and the at least one TCI state corresponds to a code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0254] In one implementation, the at least one TCI state indicated by the third information is used to determine the quasi-co-location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non-zero power non-zero power channel state information reference signal (CSI-RS); and / or, the at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0255] In one implementation, the TCI state includes an uplink and downlink combined TCI state, and / or a downlink TCI state.

[0256] Figure 13 It is a block diagram of a device for determining a TCI state shown according to an exemplary embodiment. Refer to Figure 13 , the device includes a sending module 201. Among them, the device 200 for determining the TCI state is applied to a network device.

[0257] The sending module 201 is configured to send first information to a terminal, and the first information is used to indicate that the transmission mode used by the terminal for PDCCH transmission is the SFN transmission mode;

[0258] The sending module 201 is further configured to send second information to the terminal, and the second information is used to indicate that the first control resource set is associated with at least two TCI states.

[0259] In one implementation, the sending module 201 is configured to send third information to the terminal, and the third information is used to indicate at least one TCI state, and the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal for the first control resource set.

[0260] In one implementation, the TCI state indicated by the third information is one TCI state, and one TCI state is used to instruct the terminal to stop monitoring the PDCCH candidate resources of the first control resource set.

[0261] In one implementation, at least one TCI state indicated by the third information is used to instruct the terminal to monitor the PDCCH candidate resources in the first control resource set.

[0262] In one implementation, the TCI state indicated by the third information is multiple TCI states, and multiple TCI states are used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0263] In one implementation, the TCI state indicated by the third information is one TCI state, and one TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0264] In one implementation, the TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using; the first TCI state is used to instruct the terminal to monitor the PDCCH candidate resources of the first control resource set.

[0265] In one implementation, the second information indicates the mapping relationship between the first control resource set and at least two TCI states in at least one of the following ways:

[0266] Indicating at least two TCI states corresponding to the first control resource set;

[0267] Indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

[0268] In one implementation, the second information includes at least one of the following:

[0269] Radio Resource Control signaling RRC;

[0270] Medium Access Control control element MAC-CE;

[0271] Downlink Control Information DCI.

[0272] In one implementation, the third information includes at least one of the following:

[0273] MAC-CE;

[0274] DCI.

[0275] In one implementation, the MAC-CE is used to indicate at least one TCI state, and the at least one TCI state corresponds to one code point in the TCI state indication field carried in the DCI; or the MAC-CE is used to indicate at least one TCI state corresponding to each of multiple code points in the TCI state indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0276] In one implementation, the at least one TCI state indicated by the third information is used to determine the quasi-co-location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non-zero power (NZP) channel state information reference signal (CSI-RS); and / or, the at least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

[0277] In one implementation, the TCI state includes an uplink-downlink combined TCI state, and / or a downlink TCI state.

[0278] It should be noted that, for each module / unit involved in the TCI determination device 100 and the TCI determination device 200 according to the embodiments of the present disclosure, it is only for illustrative purposes and not limited thereto. For example, the TCI determination device 100 in the embodiments of the present disclosure may further include a sending unit. The TCI determination device 200 may further include a receiving unit and / or a processing unit. Among them, the units included in the TCI determination device 100 and the TCI determination device 200 may interact with each other or interact with other network element devices.

[0279] Regarding the devices in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0280] Figure 14 It is a block diagram of a TCI determination device shown according to an exemplary embodiment. For example, the device 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0281] Refer to Figure 14, the device 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0282] The processing component 302 generally controls the overall operation of the device 300, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to complete all or part of the steps of the above-described methods. In addition, the processing component 302 may include one or more modules to facilitate the interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate the interaction between the multimedia component 308 and the processing component 302.

[0283] The memory 304 is configured to store various types of data to support the operation of the device 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phone book data, messages, pictures, videos, etc. The memory 304 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0284] The power component 306 provides power to the various components of the device 300. The power component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 300.

[0285] The multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may not only sense the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0286] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the device 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0287] The I / O interface 312 provides an interface between the processing component 302 and peripheral interface modules, and the peripheral interface modules may be a keyboard, a click wheel, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a power button, and a lock button.

[0288] The sensor component 314 includes one or more sensors for providing status assessments of various aspects of the device 300. For example, the sensor component 314 can detect the on / off state of the device 300, the relative positioning of components, such as the display and keypad of the device 300. The sensor component 314 can also detect a change in the position of the device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and the temperature change of the device 300. The sensor component 314 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 314 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 314 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0289] The communication component 316 is configured to facilitate communication between the device 300 and other devices in a wired or wireless manner. The device 300 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0290] In an exemplary embodiment, the apparatus 300 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0291] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 304 including instructions, may be provided, and the above instructions may be executed by the processor 320 of the apparatus 300 to complete the above method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0292] Figure 15 FIG. is a block diagram of a determination apparatus for TCI according to an exemplary embodiment. For example, the apparatus 400 may be provided as a network device. Referring to Figure 15 , the apparatus 400 includes a processing component 422, which further includes one or more processors, and memory resources represented by a memory 432 for storing instructions executable by the processing component 422, such as application programs. The application programs stored in the memory 432 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 422 is configured to execute instructions to perform the above method.

[0293] The apparatus 400 may further include a power component 426 configured to perform power management of the apparatus 400, a wired or wireless network interface 450 configured to connect the apparatus 400 to a network, and an input / output (I / O) interface 458. The apparatus 400 may operate based on an operating system stored in the memory 432, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

[0294] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 432 including instructions, may be provided, and the above instructions may be executed by the processing component 422 of the apparatus 400 to complete the above method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0295] It can be further understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms of "a", "the" and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0296] It can be further understood that the meanings of words such as "responsive to" and "if" involved in the present disclosure depend on the context and the actual usage scenario. For example, the word "responsive to" as used herein can be interpreted as "when...", "while...", "if" or "when".

[0297] It can be further understood that terms such as "first" and "second" are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other, and do not indicate a specific order or importance. In fact, expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0298] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that these operations are required to be performed in the specific order shown or in a serial order, or that all the operations shown are required to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0299] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure.

[0300] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A method for determining a Transmission Configuration Indicator (TCI) state, characterized in that Applied to a terminal, the method includes: Receiving first information sent by a network device, where the first information is used for the terminal to determine that the transmission mode used for physical downlink control channel (PDCCH) transmission is a single-frequency network (SFN) transmission mode; Receiving second information sent by the network device, where the second information is used for the terminal to determine the association relationship between a first control resource set and at least two transmission configuration indication (TCI) states; Receiving third information sent by the network device, where the third information includes downlink control information (DCI), and the third information is used to indicate at least one TCI state; Based on the at least one TCI state, determining whether to monitor the PDCCH candidate resources of the first control resource set; and / or Based on the at least one TCI state indicated by the third information, monitoring the PDCCH candidate resources of the first control resource set; The monitoring of the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information includes: Based on the multiple TCI states indicated by the third information, monitoring the PDCCH candidate resources of the first control resource set.

2. The method according to claim 1, characterized in that, The TCI state indicated by the third information is one TCI state; The determining whether to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state includes: Based on the one TCI state, determining to stop monitoring the PDCCH candidate resources of the first control resource set.

3. The method according to claim 1, wherein The TCI state indicated by the third information is one TCI state; The monitoring of the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information includes: Based on the one TCI state, monitoring the PDCCH candidate resources of the first control resource set.

4. The method according to claim 1, wherein The TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state currently being used by the terminal; The monitoring of the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information includes: Based on the first TCI state and the third TCI state, monitoring the PDCCH candidate resources of the first control resource set.

5. The method according to any one of claims 1 to 4, characterized in that The second information indicates the association relationship between the first control resource set and at least two transmission configuration indication (TCI) states through at least one of the following methods: Indicating at least two TCI states corresponding to the first control resource set; Indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

6. The method according to any one of claims 1 to 4, where the second information includes at least one of the following: Radio resource control (RRC) signaling; Medium access control control element (MAC-CE); Downlink control information (DCI).

7. The method according to any one of claims 1 to 4, characterized in that, At least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), control resource set associated with the PDCCH, demodulation reference signal (DMRS) of the PDSCH and / or PDCCH, and non - zero power (NZP) channel state information reference signal (CSI - RS); and / or, At least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and sounding reference signal (SRS).

8. The method according to any one of claims 1 to 4, characterized in that, The TCI state includes an uplink - downlink joint TCI state, and / or, a downlink TCI state.

9. A method for determining a Transmission Configuration Indicator (TCI) state, characterized in that, Applied to a network device, the method includes: Sending first information to a terminal, where the first information is used to indicate that the transmission mode used by the terminal for physical downlink control channel (PDCCH) transmission is a single - frequency network (SFN) transmission mode; Sending second information to the terminal, where the second information is used to indicate that a first control resource set is associated with at least two transmission configuration indication (TCI) states; Sending third information to the terminal, where the third information includes downlink control information (DCI), and the third information is used to indicate at least one TCI state, and the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal for the first control resource set; The TCI states indicated by the third information are multiple TCI states, and the multiple TCI states are used to monitor the PDCCH candidate resources of the first control resource set.

10. The method according to claim 9, wherein The TCI state indicated by the third information is one TCI state, and the one TCI state is used to indicate that the terminal stops monitoring the PDCCH candidate resources of the first control resource set.

11. The method according to claim 9, wherein The TCI state indicated by the third information is one TCI state, and the one TCI state is used to indicate that the terminal monitors the PDCCH candidate resources of the first control resource set.

12. The method according to claim 9, wherein The TCI state indicated by the third information includes a first TCI state, and the first TCI state is an update of the second TCI state among the second TCI state and the third TCI state that the terminal is currently using; the first TCI state is used to indicate that the terminal monitors the PDCCH candidate resources of the first control resource set.

13. The method according to any one of claims 9 to 12, characterized in that, The second information indicates the mapping relationship between the first control resource set and at least two transmission configuration indication (TCI) states through at least one of the following methods: Indicating at least two TCI states corresponding to the first control resource set; Indicating at least two TCI states corresponding to the control resource set group or control resource set pool index to which the first control resource set belongs.

14. The method according to any one of claims 9 to 12, where the second information includes at least one of the following: Radio resource control (RRC) signaling; Medium access control control element (MAC - CE); Downlink Control Information DCI.

15. The method according to any one of claims 9 to 12, characterized in that At least one TCI state indicated by the third information is used to determine the quasi - co - location (QCL) assumption of at least one of the Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), control resource set associated with the PDCCH, Demodulation Reference Signal (DMRS) of the PDSCH and / or PDCCH, and Non - Zero Power (NZP) Channel State Information Reference Signal (CSI - RS); and / or, At least one TCI state indicated by the third information is used to determine the QCL assumption of at least one of the Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), DMRS of the PUCCH and / or PUSCH, and Sounding Reference Signal (SRS).

16. The method according to any one of claims 9 to 12, characterized in that The TCI state includes an uplink - downlink joint TCI state, and / or, a downlink TCI state.

17. A determining device for a transmission configuration indication state TCI, characterized in that, Applied to a terminal, the apparatus includes: A receiving module, configured to receive first information sent by a network device, where the first information is used to indicate that the transmission mode used by the terminal for Physical Downlink Control Channel (PDCCH) transmission is Single - Frequency Network (SFN) transmission mode; The receiving module is further configured to receive second information sent by the network device, where the second information is used to indicate that the first control resource set of the terminal is associated with at least two Transmission Configuration Indication (TCI) states; The receiving module is further configured to receive third information sent by the network device, where the third information includes DCI, and the third information is used to indicate at least one TCI state; A processing module, configured to determine whether to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state; and / or, The processing module is further configured to monitor the PDCCH candidate resources of the first control resource set based on the at least one TCI state indicated by the third information; The processing module is further configured to monitor the PDCCH candidate resources of the first control resource set based on multiple TCI states indicated by the third information.

18. A determining device for a transmission configuration indication state TCI, characterized in that, Applied to a network device, the apparatus includes: A sending module, configured to send first information to a terminal, where the first information is used to indicate that the transmission mode used by the terminal for Physical Downlink Control Channel (PDCCH) transmission is Single - Frequency Network (SFN) transmission mode; The sending module is further configured to send second information to the terminal, where the second information is used to indicate that the first control resource set of the terminal is associated with at least two Transmission Configuration Indication (TCI) states; The sending module is further configured to send third information to the terminal, where the third information includes DCI, and the third information is used to indicate at least one TCI state, where the at least one TCI state is used to indicate whether the terminal monitors the PDCCH candidate resources of the first control resource set; and / or, the at least one TCI state is used to indicate one or more TCI states corresponding to the PDCCH candidate resources monitored by the terminal; The TCI state indicated by the third information is multiple TCI states, and the multiple TCI states are used to monitor the PDCCH candidate resources of the first control resource set.

19. A communication device, characterized in that, Includes: A processor; A memory for storing instructions executable by the processor; Wherein, the processor is configured to execute the method according to any one of claims 1 to 8.

20. A communication device, characterized in that, Comprising: A processor; A memory for storing processor-executable instructions; Wherein, the processor is configured to execute the method according to any one of claims 9 to 16.

21. A storage medium, characterized in that, Instructions are stored in the storage medium, and when the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method according to any one of claims 1 to 8.

22. A storage medium, characterized in that, Instructions are stored in the storage medium, and when the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the method according to any one of claims 9 to 16.

23. A communication system, comprising a terminal and a network device, wherein, The terminal is configured to execute the method according to any one of claims 1 to 8; The network device is configured to execute the method according to any one of claims 9 to 16.

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