Information determination method / apparatus / device and storage medium

Abstract

The present disclosure provides an information determination method / apparatus / device and a storage medium. The method comprises: receiving configuration information and indication information; wherein the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink (DL) TCI state; in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, determining a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. The present disclosure provides a method for a terminal device to determine which TCI state is used for PDCCH transmission in the case that a network device indicates three or four TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of communication technology, and in particular, to an information determination method / apparatus / device and a storage medium. BACKGROUND

[0002] In a Multiple-Input Multiple-Output (MIMO) system, coherent joint transmission (CJT) implemented by multiple transmission reception points (TRPs) with ideal backhaul connection is introduced. And, currently, unified transmission configuration indicator state (unified TCI state) has considered the case of Single-TRP (S-TRP). Specifically, the unified TCI state indicates the same set of TCI states for multiple channels / signals of one TRP, and the same set of TCI states may be currently indicated separately for uplink and downlink, i.e., DL (downlink) TCI state and / or UL (uplink) TCI state are indicated respectively, or jointly indicated for uplink and downlink, i.e., joint TCI state is indicated. And, the terminal device can use the indicated DL TCI state and / or joint TCI state for PDCCH (Physical Downlink Control Channel) transmission, PDSCH (Physical Downlink Shared Channel) and / or reception of downlink signals.

[0003] In the related art, MIMO currently supports at most 4-TRP CJT, and the network device indicates 3 or 4 TCI states to the terminal device. However, currently, only the method for the terminal device to determine which TCI state to use for PDCCH transmission when the network device indicates 1 or 2 TCI states is discussed, and therefore, the method in the related art cannot be applied to the determination process of the terminal device to determine which TCI state to use for PDCCH transmission when the network device indicates 3 or 4 TCI states. SUMMARY

[0004] The information determination method / apparatus / device and storage medium provided by the present disclosure are used for a terminal device to determine which TCI state to use for PDCCH transmission when the network device indicates 3 or 4 TCI states.

[0005] In a first aspect, the embodiments of the present disclosure provide an information determination method, which is executed by a terminal device and includes the following steps.

[0006] receiving configuration information and indication information, wherein the configuration information is used to configure a transmission method of a physical downlink shared channel (PDSCH), and the indication information is used to indicate at least one joint transmission configuration indication (TCI) state (joint TCI state) and / or at least one downlink (DL) TCI state;

[0007] determining, in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, a TCI state used for physical downlink control channel (PDCCH) transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state.

[0008] In the present disclosure, a terminal device receives configuration information and indication information, wherein the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where a network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0009] In a second aspect, the embodiments of the present disclosure provide an information determination method, which is executed by a network device and includes the following steps.

[0010] transmit configuration information and indication information; wherein the configuration information is used for configuring a transmission method of a PDSCH, and the indication information is used for indicating at least one joint TCI state and / or at least one downlink DL TCI state.

[0011] In a third aspect, an embodiment of the present disclosure provides a communication device, which is configured in a terminal device, comprising:

[0012] a transceiver module, configured to receive configuration information and indication information; wherein the configuration information is used for configuring a transmission method of a PDSCH, and the indication information is used for indicating at least one joint TCI state and / or at least one downlink DL TCI state;

[0013] a processing module, configured to determine a TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state, in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method.

[0014] In a fourth aspect, an embodiment of the present disclosure provides a communication device, which is configured in a network device, comprising:

[0015] a transceiver module, configured to transmit configuration information and indication information; wherein the configuration information is used for configuring a transmission method of a PDSCH, and the indication information is used for indicating at least one joint TCI state and / or at least one downlink DL TCI state.

[0016] In a fifth aspect, an embodiment of the present disclosure provides a communication device, which comprises a processor, and executes the method in the first aspect when the processor invokes a computer program in a memory.

[0017] In a sixth aspect, an embodiment of the present disclosure provides a communication device, which comprises a processor, and executes the method in the second aspect when the processor invokes a computer program in a memory.

[0018] In a seventh aspect, an embodiment of the present disclosure provides a communication device, which comprises a processor and a memory, and the memory stores a computer program; the processor executes the computer program stored in the memory, so that the communication device executes the method in the first aspect.

[0019] In an eighth aspect, an embodiment of the present disclosure provides a communication device, which comprises a processor and a memory, and the memory stores a computer program; the processor executes the computer program stored in the memory, so that the communication device executes the method in the second aspect.

[0020] In a ninth aspect, an embodiment of the present disclosure provides a communication apparatus, which comprises a processor and an interface circuit, the interface circuit being configured to receive code instructions and transmit the code instructions to the processor, and the processor being configured to execute the code instructions to enable the apparatus to perform the method of the first aspect.

[0021] In a tenth aspect, an embodiment of the present disclosure provides a communication apparatus, which comprises a processor and an interface circuit, the interface circuit being configured to receive code instructions and transmit the code instructions to the processor, and the processor being configured to execute the code instructions to enable the apparatus to perform the method of the second aspect.

[0022] In an eleventh aspect, an embodiment of the present disclosure provides a communication system, which comprises the communication apparatus of the third aspect to the communication apparatus of the fourth aspect, or the communication apparatus of the fifth aspect to the communication apparatus of the sixth aspect, or the communication apparatus of the seventh aspect to the communication apparatus of the eighth aspect, or the communication apparatus of the ninth aspect to the communication apparatus of the tenth aspect.

[0023] In a twelfth aspect, an embodiment of the present disclosure provides a computer readable storage medium, which is configured to store instructions for the network device, and when the instructions are executed, the terminal device performs the method of any one of the first aspect to the second aspect.

[0024] In a thirteenth aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, causes the computer to perform the method of any one of the first aspect to the second aspect.

[0025] In a fourteenth aspect, the present disclosure provides a chip system, which comprises at least one processor and an interface, and is configured to support the network device to implement the functions involved in the method of any one of the first aspect to the second aspect, for example, determining or processing at least one of the data and information involved in the method. In a possible design, the chip system further comprises a memory, and the memory is configured to store computer programs and data necessary for the secondary node. The chip system can be composed of a chip, or can comprise a chip and other discrete devices.

[0026] In a fifteenth aspect, the present disclosure provides a computer program, which, when executed on a computer, causes the computer to perform the method of any one of the first aspect to the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above-mentioned and / or additional aspects and advantages of the present disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings,

[0028] wherein:

[0029] Figure 1 A schematic diagram of an architecture of a communication system provided by an embodiment of the present disclosure is shown in FIG. 1.

[0030] Figure 2 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 2.

[0031] Figure 3 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 3.

[0032] Figure 4 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 4.

[0033] Figure 5 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 5.

[0034] Figure 6 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 6.

[0035] Figure 7 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 7.

[0036] Figure 8 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 8.

[0037] Figure 9 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 9.

[0038] Figure 10 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 10.

[0039] Figure 11 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 11.

[0040] Figure 12 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 12.

[0041] Figure 13 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 13.

[0042] Figure 14 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 14.

[0043] Figure 15 A schematic diagram of a flow of an information determination method provided by another embodiment of the present disclosure is shown in FIG. 15.

[0044] Figure 16 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0045] Figure 17 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0046] Figure 18 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0047] Figure 19 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0048] Figure 20 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0049] Figure 21 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0050] Figure 22 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0051] Figure 23 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0052] Figure 24 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0053] Figure 25 Flowchart of the information determination method provided by another embodiment of the present disclosure;

[0054] Figure 26 Structure diagram of the communication device provided by another embodiment of the present disclosure;

[0055] Figure 27 Structure diagram of the communication device provided by another embodiment of the present disclosure;

[0056] Figure 28 Block diagram of a user equipment provided by an embodiment of the present disclosure;

[0057] Figure 29 Block diagram of a network side equipment provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this disclosure as detailed in the appended claims.

[0059] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0060] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the words “if” and “suppose” as used herein may be interpreted as “when”, “when”, or “in response to a determination”.

[0061] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0062] To facilitate understanding, the terminology used in this application will be introduced first.

[0063] 1. Unified Transmission Configuration Indicator State (unified TCI state)

[0064] The unified TCI state includes a joint TCI state and / or a separate TCI state. The joint TCI state specifically includes a TCI state that is used for both uplink transmission and downlink reception. The separate TCI state specifically includes a TCI state that is used for uplink transmission or downlink reception. The separate TCI state includes a DL TCI state and an UL TCI state. The DL TCI state is used for downlink reception, and the UL TCI state is used for uplink transmission.

[0065] 2. Physical Downlink Control Channel (PDCCH) transmission

[0066] The PDCCH carries downlink control information, including transmission format, resource allocation, uplink scheduling permission, power control, and uplink retransmission information.

[0067] 3. Physical Downlink Shared Channel (PDSCH)

[0068] The PDSCH is used to carry downlink data.

[0069] In order to better understand the information determination method disclosed in the embodiments of the present disclosure, the communication system to which the embodiments of the present disclosure are applicable will be described first.

[0070] Please refer to Figure 1 , Figure 1 An architecture diagram of a communication system is provided in the embodiments of the present disclosure. The communication system can include, but is not limited to, one network device, one terminal device, Figure 1 The number and form of devices shown are only for example and do not limit the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices can be included. Figure 1 The communication system shown takes one network device 11 and one terminal device 12 as an example.

[0071] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems. For example: long term evolution (LTE) system, 5th generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems, etc.

[0072] The network device 11 in the embodiments of the present disclosure is an entity for transmitting or receiving signals on the network side. For example, the network device 11 can be an evolved NodeB (eNB), a transmission reception point (TRP), a radio remote head (RRH), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device. The network device provided by the embodiments of the present disclosure can be composed of a central unit (CU) and a distributed unit (DU), wherein the CU can also be referred to as a control unit (control unit). The CU-DU structure can split the protocol layer of the network device, for example, the base station, and the functions of part of the protocol layer are controlled by the CU, and the functions of the remaining part or all of the protocol layer are distributed in the DU and controlled by the CU.

[0073] The terminal device 12 in the embodiments of the present disclosure is an entity for receiving or transmitting signals on the user side, such as a mobile phone. The terminal device can also be referred to as a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. The terminal device can be a car, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.

[0074] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0075] The information determination method / apparatus / device and storage medium provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0076] Figure 2 A flowchart of an information determination method provided by the embodiments of the present disclosure is shown in FIG. 1. The method is executed by a terminal device. As shown in FIG. 1, the information determination method can include the following steps: Figure 2

[0077] In one embodiment of the present disclosure, the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state.

[0078] It should be noted that the method of the present disclosure is applied to a MIMO system supporting at most 4 TRPs / RRHs for CJT. Therefore, in one embodiment of the present disclosure, the number of at least one joint TCI state and / or at least one DL TCI state indicated by the indication information is greater than or equal to 1 and less than or equal to 4.

[0079] In one embodiment of the present disclosure, the at least one joint TCI state and / or at least one DL TCI state indicated by the indication information can be a TCI state used for transmission of a PDSCH.

[0080] Further, in one embodiment of the present disclosure, the joint TCI state or DL TCI state can include a quasi co-location type A (QCL Type A) and / or a QCL Type B. The QCL Type A can include {average delay, delay spread, Doppler shift, Doppler spread}. The QCL Type B can include {Doppler shift, Doppler spread}.

[0081] ​In another embodiment of the disclosure, the joint TCI state or the DL TCI state can contain a quasi-co-location type, which includes at least one parameter of the following:

[0082] average delay;

[0083] delay spread;

[0084] Doppler shift;

[0085] Doppler spread.

[0086] In step 202, the transmission method of the PDSCH configured in response to the configuration information is a target transmission method, and the TCI state used for PDCCH transmission and / or downlink signal transmission in at least one joint TCI state and / or at least one DL TCI state is determined.

[0087] In one embodiment of the disclosure, the target transmission method can be CJT. In one embodiment of the disclosure, the CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT.

[0088] In one embodiment of the disclosure, the downlink signal can include at least one of the following:

[0089] Channel State Information Reference Signal (CSI-RS);

[0090] Demodulation Reference Signal (DMRS);

[0091] Positioning Reference Signal (PRS);

[0092] Tracking Reference Signal (TRS).

[0093] In addition, the detailed description of how the configuration information in step 201 specifically configures the transmission method of the PDSCH and how the indication information specifically indicates the at least one joint TCI state and / or the at least one downlink (DL) TCI state, and how the terminal device specifically determines the TCI state for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state in step 202 will be described in subsequent embodiments.

[0094] To sum up, in the information determination method provided by the disclosure, the terminal device receives configuration information and indication information, where the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the target transmission method being the transmission method of the PDSCH configured by the configuration information, the terminal device determines a TCI state for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the disclosure provides a method for the terminal device to determine which TCI state to use for the PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0095] Figure 3 A flowchart of an information determination method provided by an embodiment of the disclosure is shown in FIG. 3. The method is executed by a terminal device, which can include the following steps: Figure 3

[0096] Step 301: Receive indication information, which is carried in a first medium access control control element (MAC CE). The first MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state.

[0097] ​In an embodiment of the disclosure, the first MAC CE can indicate the at least one joint TCI state and / or the at least one DL TCI state by indicating an ID of the TCI state.

[0098] In an embodiment of the disclosure, there is a correspondence between the TCI state and a codepoint, and the TCI state indicated by the first MAC CE corresponds to the same codepoint. The information field corresponding to the codepoint is carried in the first DCI. For example, in an embodiment of the disclosure, the codepoint can be carried in the TCI field of the first DCI. The "information field corresponding to the codepoint" can be understood as an information field used to indicate the codepoint. It should be noted that, in an embodiment of the disclosure, when the TCI state indicated by the first MAC CE corresponds to the same codepoint, and the information field corresponding to the codepoint is carried in the first DCI, the first DCI can be sent to the terminal device to indicate the codepoint to the terminal device, or the first DCI can not be sent to the terminal device to indicate the codepoint to the terminal device.

[0099] For example, in an embodiment of the disclosure, assuming that the TCI state corresponding to the codepoint "000" is a joint TCI state with an ID of "2" and a DL TCI state with an ID of "3". The first MAC CE can indicate the joint TCI state with an ID of "2" and the DL TCI state with an ID of "3", and the codepoint "000" corresponding to the joint TCI state with an ID of "2" and the DL TCI state with an ID of "3" corresponds to the codepoint "000" of the TCI field of the first DCI.

[0100] To sum up, the information determination method provided by the present disclosure includes that the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0101] Figure 4 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 4, and the method is executed by a terminal device. As shown in FIG. 4, the information determination method can include the following steps: Figure 4

[0102] Step 401: receiving a second MAC CE and a second DCI.

[0103] In an embodiment of the present disclosure, the second MAC CE carries the above-mentioned indication information, and the second MAC CE can be used to indicate the at least one joint TCI state and / or the at least one DL TCI state corresponding to a plurality of codepoints respectively, and the second DCI can be used to indicate one codepoint in the plurality of codepoints, wherein the one codepoint can be indicated by the TCI field of the second DCI.

[0104] In an embodiment of the present disclosure, the second MAC CE can indicate the at least one joint TCI state and / or the at least one DL TCI state by indicating the ID of the TCI state.

[0105] ​For example, in one embodiment of the present disclosure, it is assumed that the TCI state corresponding to codepoint "000" is: the joint TCI state with ID "2" and the DL TCI state with ID "3", and the TCI state corresponding to codepoint "001" is: the joint TCI state with ID "4". Then the second MAC CE can indicate the joint TCI state with ID "2" and the DL TCI state with ID "3" corresponding to codepoint "000", and the joint TCI state with ID "4" corresponding to codepoint "001", and the TCI field of the second DCI can indicate codepoint "000" or codepoint "001".

[0106] To sum up, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0107] Figure 5 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 5. The method is executed by a terminal device, and can include the following steps: Figure 5

[0108] In step 501, configuration information is received, which is carried in a radio resource control (RRC) used to configure the transmission method of the PDSCH.​

[0109] To sum up, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenarios of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for the terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0110] Figure 6 The flowchart of the information determination method provided by the embodiment of the present disclosure is shown in the figure, and the method is executed by the terminal device. As shown in the figure, the information determination method can include the following steps: Figure 6

[0111] Step 601, receiving RRC and third MAC CE.

[0112] In one embodiment of the present disclosure, the RRC carries the above-mentioned configuration information, and the RRC is used to configure the transmission method of the PDSCH.

[0113] ​In one embodiment of the present disclosure, the third MAC CE can be used to indicate the number of joint TCI states and / or DL TCI states corresponding to the PDSCH. Alternatively, in another embodiment of the present disclosure, the third MAC CE can be used to indicate at least one joint TCI state and / or at least one DL TCI state, and the TCI states indicated by the third MAC CE correspond to the same codepoint, and the information field corresponding to the codepoint is included in the third DCI. When the third MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state, the structure of the third MAC CE is similar to that of the first MAC CE described above. For details, please refer to the above description.

[0114] In addition, it should be noted that in one embodiment of the present disclosure, the joint TCI state and / or DL TCI state corresponding to the PDSCH can be understood as the joint TCI state and / or DL TCI state used for PDSCH transmission. In addition, the number of joint TCI states and / or DL TCI states corresponding to the PDSCH can be greater than or equal to the number of at least one joint TCI state and / or at least one DL TCI state indicated by the indication information.

[0115] To sum up, the information determination method provided by the present disclosure includes the following steps:

[0116] Figure 7 The flowchart of the information determination method provided by the present disclosure is shown in FIG. 7, which is executed by a terminal device. As shown in FIG. 7, the information determination method can include the following steps: Figure 7

[0117] Step 701, receiving RRC and fourth DCI.

[0118] In one embodiment of the present disclosure, the RRC carries the configuration information described above, and the RRC is used to configure the transmission method of the PDSCH.

[0119] In one embodiment of the present disclosure, the fourth DCI can be used to indicate the number of joint TCI states and / or DL TCI states corresponding to the PDSCH. For details of the joint TCI states and / or DL TCI states corresponding to the PDSCH, please refer to the description of the above embodiments.

[0120] ​Alternatively, in one embodiment of the disclosure, the fourth DCI can be used to indicate one codepoint, where the one codepoint corresponds to at least one joint TCI state and / or at least one DL TCI state indicated by the indication information. For example, the fourth DCI can indicate the one codepoint using a TCI field or other information field.

[0121] For example, assuming the indication information indicates a joint TCI state with ID “2” and a DL TCI state with ID “3”, where the joint TCI state with ID “2” and the DL TCI state with ID “3” correspond to codepoint “000”, the fourth DCI can indicate the codepoint “000” using a TCI field. Alternatively, assuming the indication information indicates a joint TCI state with ID “2” and a DL TCI state with ID “3”, where the joint TCI state with ID “2” corresponds to codepoint “00”, the DL TCI state with ID “3” corresponds to codepoint “01”, and the joint TCI state with ID “2” and the DL TCI state with ID “3” correspond to codepoint “10”, the fourth DCI can indicate the codepoint “00” or “01” or “10” using other information field. Alternatively, assuming the indication information indicates a joint TCI state with ID “2”, a DL TCI state with ID “3”, and a joint TCI state with ID “4”, where the joint TCI state with ID “2” and the DL TCI state with ID “3” correspond to codepoint “00”, and the joint TCI state with ID “4” corresponds to codepoint “01”, the fourth DCI can indicate the codepoint “00” or the codepoint “01” using other information field.

[0122] In addition, it should be noted that in one embodiment of the present disclosure, the joint TCI state and / or DL TCI state corresponding to the PDSCH described above can be understood as: the joint TCI state and / or DL TCI state used for PDSCH transmission. In addition, the number of joint TCI states and / or DL TCI states corresponding to the PDSCH can be greater than or equal to the number of at least one joint TCI state and / or at least one DL TCI state indicated by the indication information.

[0123] In summary, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being the target transmission method, the terminal device determines the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0124] Figure 8 The flowchart of the information determination method provided by the embodiment of the present disclosure is executed by a terminal device, as shown in Figure 8 The information determination method can include the following steps:

[0125] Step 801, receiving RRC, fourth MAC CE and fifth DCI.

[0126] In one embodiment of the present disclosure, the RRC carries the configuration information described above, and the RRC is used to configure the transmission method of the PDSCH.

[0127] In an embodiment of the disclosure, the fourth MAC CE can be used to indicate at least one first value, and the first value is a candidate value of a number of joint TCI states and / or DL TCI states corresponding to the PDSCH. The fifth DCI is used to indicate a codepoint, and the codepoint corresponds to one of the first values. Optionally, the one of the first values can be the actual number of joint TCI states and / or DL TCI states corresponding to the PDSCH.

[0128] As can be seen from the above, there is also a corresponding relationship between the codepoint and the candidate value. In combination with the foregoing, it can be seen that there is also a corresponding relationship between the codepoint and the TCI state. Based on this, in order to distinguish the two kinds of codepoints, in an embodiment of the disclosure, the codepoint corresponding to the candidate value and the codepoint corresponding to the TCI state are indicated by different fields of the DCI (such as the first DCI to the fifth DCI). For example, the codepoint corresponding to the TCI state is indicated by the TCI field of the DCI, and the codepoint corresponding to the candidate value is indicated by other fields of the DCI except the TCI field. Based on this, after the terminal device receives the DCI, it can be determined that the codepoint carried by the TCI field of the DCI corresponds to the TCI state, and the codepoint carried by the other fields of the DCI except the TCI field corresponds to the candidate value.

[0129] For example, assuming that the codepoint corresponding to the candidate value is indicated by the first field of the DCI except the TCI field, based on this, assuming that the candidate value of the number of joint TCI states and / or DL TCI states corresponding to the PDSCH is 2, 3, or 4, wherein the candidate value “2” corresponds to the codepoint “00”, the candidate value “3” corresponds to the codepoint “01”, the candidate value “4” corresponds to the codepoint “10”, and the actual number of joint TCI states and / or DL TCI states corresponding to the PDSCH is 3. Then the fourth MAC CE can indicate 2, 3, or 4, and the first field of the fifth DCI can indicate the codepoint “01”.

[0130] In another embodiment of the present disclosure, the fourth MAC CE can be used to indicate that a plurality of codepoints correspond to at least one joint TCI state and / or at least one DL TCI state respectively, and the fifth DCI can be used to indicate one codepoint in the plurality of codepoints. The structure of the fourth MAC CE can be similar to that of the aforementioned second MAC CE, and the structure of the fifth DCI can be similar to that of the aforementioned second DCI. For details, reference can be made to the foregoing description.

[0131] In summary, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state in the at least one joint TCI state and / or at least one DL TCI state for PDCCH transmission and / or downlink signal transmission. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenarios of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0132] Figure 9 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 9. The method is executed by a terminal device. As shown in FIG. 9, the information determination method can include the following steps: Figure 9

[0133] Step 901: Determine a first TCI state in the at least one joint TCI state and / or at least one DL TCI state indicated by the indication information as a TCI state for PDCCH transmission and / or downlink signal transmission based on a first signaling sent by a network device and / or a default rule.

[0134] In an embodiment of the present disclosure, the first signaling can include at least one of the following:​

[0135] RRC;

[0136] MAC CE;

[0137] DCI.

[0138] In an embodiment of the disclosure, the first TCI state can be the first TCI state among all the TCI states indicated by the indication information, in other words, the first TCI state can be the first indicated TCI state among all the TCI states indicated by the indication information.

[0139] For example, assuming that the indication information indicates a joint TCI state with ID “2”, a DL TCI state with ID “3”, and a joint TCI state with ID “4” in sequence, and the joint TCI state with ID “2” is the first TCI state among all the TCI states indicated by the indication information, the terminal device can determine the joint TCI state with ID “2” as the TCI state for PDCCH transmission and / or downlink signal transmission.

[0140] Alternatively, in another embodiment of the disclosure, the first TCI state can be the first TCI state among all the TCI states containing the target QCL Type indicated by the indication information. The target QCL Type can be QCL Type A or QCL Type B.

[0141] For example, assuming that the target QCL Type is target QCL Type A, if the indication information indicates a joint TCI state with ID “2”, a DL TCI state with ID “3”, and a joint TCI state with ID “4” in sequence, wherein the joint TCI state with ID “2” includes QCL Type B, and the DL TCI state with ID “3” and the joint TCI state with ID “4” include QCL Type A, wherein the DL TCI state with ID “3” is the first TCI state among all the TCI states containing QCL Type A indicated by the indication information, the terminal device can determine the DL TCI state with ID “3” as the TCI state for PDCCH transmission and / or downlink signal transmission.

[0142] To sum up, in the information determination method provided by the disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. In the method of the disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0143] Figure 10 A flowchart of an information determination method provided by an embodiment of the disclosure is shown in FIG. 10. The method is executed by a terminal device. As shown in FIG. 10, the information determination method can include the following steps: Figure 10

[0144] Step 1001: determining a first TCI state and a second TCI state from at least one joint TCI state and / or at least one DL TCI state indicated by the indication information as a TCI state used for PDCCH transmission and / or downlink signal transmission based on a second signaling sent by a network device and / or a default rule.

[0145] In an embodiment of the disclosure, the second signaling can include at least one of the following:

[0146] RRC;

[0147] MAC CE;

[0148] DCI.

[0149] The first TCI state can be determined according to the above-mentioned embodiments.

[0150] ​In one embodiment of the present disclosure, the second TCI state is the second TCI state among all the TCI states indicated by the indication information. Alternatively, in another embodiment of the present disclosure, the second TCI state is the second TCI state among the TCI states containing the target QCL Type among all the TCI states indicated by the indication information. The target QCL Type can be QCL Type A or QCL Type B. The principle of the second TCI state is similar to that of the first TCI state, and thus the present disclosure will not repeat it here.

[0151] In summary, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines the TCI state used for PDCCH transmission and / or downlink signal transmission among the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0152] Figure 11 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 8. The method is executed by a terminal device. As shown in FIG. 8, the information determination method can include the following steps: Figure 11

[0153] ​Step 1101, determining one or two of the first two TCI states in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information as the TCI state for PDCCH transmission and / or downlink signal transmission based on the third signaling sent by the network device and / or the default rule.

[0154] In an embodiment of the present disclosure, the third signaling can include at least one of the following:

[0155] RRC;

[0156] MAC CE;

[0157] DCI.

[0158] In an embodiment of the present disclosure, the first two TCI states are the first two TCI states among all the TCI states indicated by the indication information. Alternatively, in another embodiment of the present disclosure, the first two TCI states are the first two TCI states among the TCI states containing the target QCL Type among all the TCI states indicated by the indication information. The target QCL Type can be QCL Type A or QCL Type B. The principle of the first two TCI states is similar to that of the first TCI state, which will not be described herein.

[0159] Further, in an embodiment of the present disclosure, the first TCI state, or the second TCI state, or the first TCI state and the second TCI state among the first two TCI states in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information can be determined as the TCI state for PDCCH transmission and / or downlink signal transmission.

[0160] To sum up, the information determination method provided by the present disclosure includes that the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenarios of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where a network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0161] Figure 12 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 12. The method is executed by a terminal device, and can include the following steps: Figure 12

[0162] Step 1201: determining one or more TCI states from the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information as a TCI state used for PDCCH transmission and / or downlink signal transmission based on a fourth signaling sent by a network device and / or a default rule.

[0163] In an embodiment of the present disclosure, the fourth signaling can include at least one of the following:

[0164] RRC;

[0165] MAC CE;

[0166] DCI.

[0167] In an embodiment of the present disclosure, the plurality of TCI states can be 2 TCI states, 3 TCI states, or 4 TCI states.

[0168] ​To sum up, the information determination method provided by the present disclosure includes that the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0169] Figure 13 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 13. The method is executed by a terminal device, and the information determination method can include the following steps: Figure 12

[0170] Step 1301: respectively determine the TCI state used for the PDCCH transmission in the at least one joint TCI state and / or the at least one DL TCI state, and the TCI state used for the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state.

[0171] Specifically, in one embodiment of the present disclosure, the TCI state used for the PDCCH transmission in the at least one joint TCI state and / or the at least one DL TCI state can be determined separately, and the TCI state used for the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state can be determined separately.

[0172] ​For example, the first TCI state of the at least one joint TCI state and / or the first one of the at least one DL TCI state indicated by the indication information can be determined as the TCI state for PDCCH transmission based on the first signaling sent by the network device, and the second TCI state of the first two TCI states of the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information can be determined as the TCI state for downlink signal transmission based on the third signaling sent by the network device.

[0173] To sum up, in the information determination method provided by the present disclosure, the terminal device receives configuration information and indication information, wherein the configuration information is used to configure the transmission method of PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of PDSCH configured by the configuration information being a target transmission method, the terminal device determines the TCI state of the at least one joint TCI state and / or the at least one DL TCI state for PDCCH transmission and / or downlink signal transmission. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where a network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0174] It should be noted that, in the present disclosure, any two or more of the first MAC CE, the second MAC CE, the third MAC CE, the fourth MAC CE, the MAC CE as the first signaling, the MAC CE as the second signaling, the MAC CE as the third signaling, and the MAC CE as the fourth signaling can be different MAC CEs or the same MAC CE. Similarly, in the present disclosure, any two or more of the first DCI, the second DCI, the third DCI, the fourth DCI, the fifth DCI, the DCI as the first signaling, the DCI as the second signaling, the DCI as the third signaling, and the DCI as the fourth signaling can be different DCIs or the same DCI. In addition, in the present disclosure, any two or more of the RRC carrying the configuration information, the RRC as the first signaling, the RRC as the second signaling, the RRC as the third signaling, and the RRC as the fourth signaling can be different RRCs or the same RRC.

[0175] Figure 14 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 13. The method is performed by a network device, and the method can include the following steps. Figure 14

[0176] Step 1401: transmitting configuration information and indication information.

[0177] The configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink (DL) TCI state.

[0178] For details of step 1401, refer to the description of the above embodiments.

[0179] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0180] Figure 15 The flowchart of the information determination method provided by the present disclosure is shown in the method executed by the network device, as shown in Figure 15 The information determination method can include the following steps:

[0181] Step 1501, sending indication information, the indication information is carried in a first MAC CE, and the first MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state.

[0182] In addition, the detailed description of step 1501 can refer to the above embodiment description.

[0183] To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0184] Figure 16 The flowchart of the information determination method provided by the present disclosure is shown in FIG. 16. The method is executed by the network device, and as shown in FIG. 16, the information determination method can include the following steps: Figure 16

[0185] Step 1601, sending a second MAC CE and a second DCI.

[0186] The detailed description of step 1601 can be referred to the above embodiment description.

[0187] ​To sum up, the information determination method provided by the present disclosure, the network device sends configuration information and indication information to the terminal device, wherein the configuration information is used to configure the transmission method of PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of PDSCH configured by the configuration information is the target transmission method, the terminal device determines the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenario of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0188] Figure 17 The flowchart of the information determination method provided by the present disclosure is shown in the embodiment of the present disclosure, and the method is executed by a network device, as shown in Figure 17 The information determination method can include the following steps:

[0189] Step 1701, send configuration information, and the configuration information is carried in RRC, and the RRC is used to configure the transmission method of PDSCH.

[0190] The detailed description of step 1701 can be referred to the above embodiment description.

[0191] To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0192] Figure 18 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 18. The method is executed by a network device, and the information determination method can include the following steps. Figure 18

[0193] Step 1801: Send RRC and the third MAC CE.

[0194] For detailed description of step 1801, reference can be made to the above embodiment description.

[0195] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0196] Figure 19 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 19. The method is performed by a network device, and can include the following steps. Figure 19

[0197] Step 1901: Send RRC and the fourth DCI.

[0198] For detailed description of step 1901, reference can be made to the above embodiment description.

[0199] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0200] Figure 20 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 20. The method is executed by a network device, and the information determination method can include the following steps. Figure 20

[0201] Step 2001: sending RRC, a fourth MAC CE, and a fifth DCI.

[0202] For detailed description of step 2001, reference can be made to the above embodiment description.

[0203] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0204] Figure 21 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 21. The method is performed by a network device, which can include the following steps: Figure 21

[0205] Step 2101, sending first signaling to the terminal device; the first signaling is used to indicate that a first TCI state in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information is determined as the TCI state used for the PDCCH transmission and / or the downlink signal transmission.

[0206] In addition, the details of step 2101 can be referred to the above embodiment description.

[0207] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0208] Figure 22 The flowchart of the information determination method provided by the present disclosure is shown in FIG. 22. The method is executed by the network device, and the information determination method can include the following steps. Figure 22

[0209] Step 2201, sending second signaling to the terminal device; the second signaling is used to indicate that the first TCI state and the second TCI state in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information are determined as the TCI state used for the PDCCH transmission and / or the downlink signal transmission.

[0210] In addition, the detailed description of step 2201 can refer to the above-mentioned embodiment description.

[0211] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0212] Figure 23 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 26. The method is performed by a network device, and can include the following steps. Figure 23

[0213] Step 2301: sending third signaling to the terminal device; the third signaling is used to indicate that one or two of the first two TCI states in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information is determined as the TCI state used for the PDCCH transmission and / or the downlink signal transmission.

[0214] In addition, the detailed description of step 2301 can refer to the above-mentioned embodiment description.

[0215] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0216] Figure 24 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 24. The method is performed by a network device, and can include the following steps. Figure 24

[0217] Step 2401: Send fourth signaling to the terminal device; the fourth signaling is used to indicate that one or more TCI states in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information are determined as the TCI state used for the PDCCH transmission and / or the downlink signal transmission.

[0218] In addition, the detailed description of step 2401 can refer to the above embodiment description.

[0219] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0220] Figure 25 A flowchart of an information determination method provided by an embodiment of the present disclosure is shown in FIG. 25. The method is performed by a network device, and can include the following steps. Figure 25

[0221] Step 2501: respectively indicate, to the terminal device, the TCI state used for the PDCCH transmission in the at least one joint TCI state and / or the at least one DL TCI state, and the TCI state used for the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state.

[0222] In addition, the details of step 2501 can be referred to the above embodiment description.

[0223] ​To sum up, the information determination method provided by the present disclosure includes that the network device sends configuration information and indication information to the terminal device, the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is a target transmission method, the terminal device determines the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenario of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, the present disclosure provides a method for the terminal device to determine which TCI state is used for the PDCCH transmission in the case that the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0224] Figure 26 The structure schematic diagram of a communication device provided by the embodiment of the present disclosure is shown in FIG. 1. Figure 26 As shown in FIG. 1, the device can include:

[0225] a transceiver module, configured to receive configuration information and indication information; wherein the configuration information is used to configure the transmission method of the PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink DL TCI state;

[0226] a processing module, configured to determine the TCI state used for the PDCCH transmission and / or the downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method.

[0227] In summary, in the communication apparatus provided by the embodiments of the present disclosure, a terminal device receives configuration information and indication information, wherein the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state; and in response to the transmission method of the PDSCH configured by the configuration information being a target transmission method, the terminal device determines a TCI state used for PDCCH transmission and / or downlink signal transmission from the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be CJT of 2 TRPs / RRHs, CJT of 3 TRPs / RRHs, or CJT of 4 TRPs / RRHs. Therefore, the method of the present disclosure is mainly used in the scenarios of CJT of 3 TRPs / RRHs or CJT of 4 TRPs / RRHs, and of course, it is also applicable to CJT of 2 TRPs / RRHs. That is, in the case where the network device indicates 3 or 4 TCI states, the present disclosure provides a method for a terminal device to determine which TCI state to use for PDCCH transmission, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0228] Optionally, in an embodiment of the present disclosure, the target transmission method is coherent joint transmission CJT.

[0229] Optionally, in an embodiment of the present disclosure, the indication information is carried in a first medium access control layer control element MAC CE; and the first MAC CE is used to indicate the at least one joint TCI state and / or the at least one DL TCI state.

[0230] Optionally, in an embodiment of the present disclosure, the TCI states indicated by the first MAC CE correspond to a same codepoint, and information fields corresponding to the codepoint are included in first downlink control information DCI.

[0231] Optionally, in an embodiment of the present disclosure, the indication information is carried in a second MAC CE; wherein the second MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to a plurality of codepoints respectively.

[0232] The method further includes:

[0233] receive a second DCI, the second DCI being used to indicate one codepoint in the plurality of codepoints.

[0234] Optionally, in an embodiment of the present disclosure, the configuration information is carried in a radio resource control (RRC), and the RRC is used to configure a transmission method of the PDSCH.

[0235] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0236] receive a third MAC CE, wherein the third MAC CE is used to indicate a number of joint TCI states and / or DL TCI states corresponding to the PDSCH; or

[0237] the third MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state, the TCI states indicated by the third MAC CE correspond to a same codepoint, and information fields corresponding to the codepoint are included in a third DCI.

[0238] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0239] receive a fourth DCI, wherein the fourth DCI is used to indicate a number of joint TCI states and / or DL TCI states corresponding to the PDSCH; or

[0240] the fourth DCI is used to indicate one codepoint, and the codepoint corresponds to at least one joint TCI state and / or at least one DL TCI state in the joint TCI states and / or the DL TCI states indicated by the indication information.

[0241] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0242] receive a fourth MAC CE and a fifth DCI, wherein the fourth MAC CE is used to indicate at least one first value, the first value being a candidate value of a number of joint TCI states and / or DL TCI states corresponding to the PDSCH, and the fifth DCI is used to indicate one codepoint, and the codepoint corresponds to one of the first values; or

[0243] The fourth MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to a plurality of codepoints respectively, and the fifth DCI is used to indicate one codepoint in the plurality of codepoints.

[0244] Optionally, in an embodiment of the present disclosure, the processing module is further configured to perform at least one of the following:

[0245] determine a first TCI state in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information as a TCI state for PDCCH transmission and / or downlink signal transmission based on first signaling sent by the network device and / or a default rule;

[0246] determine a first TCI state and a second TCI state in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information as TCI states for PDCCH transmission and / or downlink signal transmission based on second signaling sent by the network device and / or a default rule;

[0247] determine one or both of the first TCI state and the second TCI state in the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information as a TCI state for PDCCH transmission and / or downlink signal transmission based on third signaling sent by the network device and / or a default rule.

[0248] Optionally, in an embodiment of the present disclosure, the joint TCI state and / or the DL TCI state comprises quasi co-location types QCL Type A and / or QCL Type B.

[0249] Optionally, in an embodiment of the present disclosure, the joint TCI state and / or the DL TCI state comprises a quasi co-location type, and the quasi co-location type comprises at least one of the following parameters:

[0250] average delay;

[0251] delay spread;

[0252] Doppler shift;

[0253] Doppler spread.

[0254] Optionally, in an embodiment of the present disclosure, the first TCI state is a first TCI state among all TCI states indicated by the indication information; or

[0255] The first TCI state is a first TCI state among all TCI states indicated by the indication information.

[0256] Optionally, in an embodiment of the present disclosure, the second TCI state is a second TCI state among all TCI states indicated by the indication information; or

[0257] The second TCI state is a second TCI state among all TCI states indicated by the indication information.

[0258] Optionally, in an embodiment of the present disclosure, the first two TCI states are the first two TCI states among all TCI states indicated by the indication information; or

[0259] The first two TCI states are the first two TCI states among all TCI states indicated by the indication information.

[0260] Optionally, in an embodiment of the present disclosure, the network device is characterized in that,

[0261] The target QCL Type includes QCL Type A or QCL Type B.

[0262] Optionally, in an embodiment of the present disclosure, the processing module is further configured to:

[0263] Determine one or more TCI states in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information as the TCI state for PDCCH transmission and / or downlink signal transmission based on the fourth signaling sent by the network device and / or a default rule.

[0264] Optionally, in an embodiment of the present disclosure, the first signaling, the second signaling, the third signaling or the fourth signaling includes at least one of:

[0265] RRC;

[0266] MAC CE;

[0267] DCI.

[0268] Optionally, in an embodiment of the present disclosure, the processing module is further configured to:

[0269] determine the TCI state for PDCCH transmission in the at least one joint TCI state and / or at least one DL TCI state and the TCI state for downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state, respectively.

[0270] Optionally, in an embodiment of the present disclosure, the downlink signal comprises at least one of:

[0271] a channel status information reference signal (CSI-RS);

[0272] a demodulation reference signal (DMRS);

[0273] a positioning reference signal (PRS);

[0274] a tracking reference signal (TRS).

[0275] Figure 27 A structural schematic diagram of a communication device provided by an embodiment of the present disclosure is shown in Figure 27 The device can include:

[0276] a transceiver configured to send configuration information and indication information, wherein the configuration information is used to configure a transmission method of a PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink (DL) TCI state.

[0277] In summary, in the communication apparatus provided by the embodiments of the present disclosure, the network device sends configuration information and indication information to the terminal device, wherein the configuration information is used to configure the transmission method of the PDSCH, the indication information is used to indicate at least one joint TCI state and / or at least one DL TCI state, and when the transmission method of the PDSCH configured by the configuration information is the target transmission method, the terminal device determines the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or the at least one DL TCI state. In the method of the present disclosure, the target transmission method can be CJT. The CJT can be 2-TRP / RRH CJT, 3-TRP / RRH CJT, or 4-TRP / RRH CJT. Therefore, the method of the present disclosure is mainly used in the scenarios of 3-TRP / RRH CJT or 4-TRP / RRH CJT, and of course, it is also applicable to 2-TRP / RRH CJT. That is, the present disclosure provides a method for the terminal device to determine which TCI state to use for PDCCH transmission in the case where the network device indicates 3 or 4 TCI states, thereby improving the transmission performance based on Multi-TRP coherent joint transmission.

[0278] Optionally, in an embodiment of the present disclosure, the indication information is carried in a first MAC CE; the first MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state.

[0279] Optionally, in an embodiment of the present disclosure, the TCI state indicated by the first MAC CE corresponds to the same codepoint, and the information domain corresponding to the codepoint is included in the first DCI.

[0280] Optionally, in an embodiment of the present disclosure, the indication information is carried in a second MAC CE; wherein the second MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to a plurality of codepoints respectively.

[0281] The apparatus is also used to:

[0282] receive a second DCI, wherein the second DCI is used to indicate one codepoint in the plurality of codepoints.

[0283] Optionally, in an embodiment of the present disclosure, the configuration information is carried in RRC; and the RRC is used to configure a transmission method of the PDSCH.

[0284] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0285] transmit a third MAC CE; wherein the third MAC CE is used to indicate a number of joint TCI states and / or DL TCI states corresponding to the PDSCH; or

[0286] the third MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state, the TCI states indicated by the third MAC CE all correspond to a same codepoint, and information domains corresponding to the codepoint are included in the third DCI.

[0287] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0288] transmit a fourth DCI; wherein the fourth DCI is used to indicate a number of joint TCI states and / or DL TCI states corresponding to the PDSCH; or

[0289] the fourth DCI is used to indicate a codepoint, and the codepoint corresponds to at least one joint TCI state and / or at least one DL TCI state in the joint TCI states and / or the DL TCI states indicated by the indication information.

[0290] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0291] transmit a fourth MAC CE and a fifth DCI; wherein the fourth MAC CE is used to indicate at least one first value, the first value being a candidate value of the number of joint TCI states and / or DL TCI states corresponding to the PDSCH; and the fifth DCI is used to indicate a codepoint, and the codepoint corresponds to one of the first values; or

[0292] the fourth MAC CE is used to indicate a plurality of codepoints respectively corresponding to at least one joint TCI state and / or at least one DL TCI state, and the fifth DCI is used to indicate one of the plurality of codepoints.

[0293] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to perform at least one of the following:

[0294] send first signaling to the terminal device; the first signaling is used to indicate that a first TCI state of the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information is determined as a TCI state used for PDCCH transmission and / or downlink signal transmission;

[0295] send second signaling to the terminal device; the second signaling is used to indicate that the first TCI state and a second TCI state of the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information are determined as TCI states used for PDCCH transmission and / or downlink signal transmission;

[0296] send third signaling to the terminal device; the third signaling is used to indicate that one or two of the first TCI state and the second TCI state of the at least one joint TCI state and / or the at least one DL TCI state indicated by the indication information are determined as TCI states used for PDCCH transmission and / or downlink signal transmission.

[0297] Optionally, in an embodiment of the present disclosure, the joint TCI state and / or the DL TCI state comprises quasi co-location type QCL Type A and / or quasi co-location type Type B.

[0298] Optionally, in an embodiment of the present disclosure, the joint TCI state and / or the DL TCI state comprises quasi co-location type, which comprises at least one of the following parameters:

[0299] average delay;

[0300] delay spread;

[0301] Doppler shift;

[0302] Doppler spread.

[0303] Optionally, in an embodiment of the present disclosure, the first TCI state is a first TCI state of all TCI states indicated by the indication information; or

[0304] The first TCI state is the first TCI state among all TCI states indicated by the indication information and containing the target QCL Type.

[0305] Optionally, in an embodiment of the present disclosure, the second TCI state is the second TCI state among all TCI states indicated by the indication information; or

[0306] The second TCI state is the second TCI state among all TCI states indicated by the indication information and containing the target QCL Type.

[0307] Optionally, in an embodiment of the present disclosure, the first two TCI states are the first two TCI states among all TCI states indicated by the indication information; or

[0308] The first two TCI states are the first two TCI states among all TCI states indicated by the indication information and containing the target QCL Type.

[0309] Optionally, in an embodiment of the present disclosure,

[0310] The target QCL Type contains QCL Type A or QCL Type B.

[0311] Optionally, in an embodiment of the present disclosure, the apparatus is further configured to:

[0312] Send fourth signaling to the terminal device; the fourth signaling is used to indicate that one or more TCI states in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information are determined as TCI states for PDCCH transmission and / or downlink signal transmission.

[0313] Optionally, in an embodiment of the present disclosure, the first signaling, the second signaling, the third signaling or the fourth signaling comprises at least one of the following:

[0314] RRC;

[0315] MAC CE;

[0316] DCI.

[0317] Optionally, in an embodiment of the present disclosure, the network device is configured to indicate to the terminal device the at least one joint TCI state and / or at least one DL TCI state used for PDCCH transmission and the at least one joint TCI state and / or at least one DL TCI state used for downlink signal transmission, respectively.

[0318] Optionally, in an embodiment of the present disclosure, the downlink signal comprises at least one of the following:

[0319] CSI-RS;

[0320] DMRS;

[0321] PRS;

[0322] TRS.

[0323] Please refer to Figure 28 , Figure 28 is a structural schematic diagram of a communication apparatus 2800 provided by an embodiment of the present disclosure. The communication apparatus 2800 can be a network device, a terminal device, a chip, a chip system, or a processor supporting the implementation of the network device or terminal device, and can be used to implement the method described in the above method embodiments. For details, please refer to the description in the above method embodiments.

[0324] The communication apparatus 2800 can include one or more processors 2801. The processor 2801 can be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication apparatus (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process data of the computer program.

[0325] Optionally, the communication apparatus 2800 can further include one or more memories 2802, which can store a computer program 2804. The processor 2801 executes the computer program 2804, so that the communication apparatus 2800 executes the method described in the above method embodiments. Optionally, the memory 2802 can also store data. The communication apparatus 2800 and the memory 2802 can be separately arranged or integrated together.

[0326] Optionally, the communication apparatus 2800 can further include a transceiver 2805, an antenna 2806. The transceiver 2805 can be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc., for implementing the transceiving function. The transceiver 2805 can include a receiver and a transmitter. The receiver can be referred to as a receiver, or a receiving circuit, etc., for implementing the receiving function; the transmitter can be referred to as a transmitter, or a transmitting circuit, etc., for implementing the transmitting function.

[0327] Optionally, the communication apparatus 2800 can further include one or more interface circuits 2807. The interface circuit 2807 is used to receive code instructions and transmit to the processor 2801. The processor 2801 runs the code instructions to make the communication apparatus 2800 perform the methods described in the above method embodiments.

[0328] In an implementation manner, the processor 2801 can include a transceiver for implementing the receiving and transmitting functions. For example, the transceiver can be a transceiving circuit, or an interface, or an interface circuit. The transceiving circuit, the interface, or the interface circuit for implementing the receiving and transmitting functions can be separate, or can be integrated together. The above transceiving circuit, interface, or interface circuit can be used for code / data reading and writing, or the above transceiving circuit, interface, or interface circuit can be used for signal transmission or transfer.

[0329] In an implementation manner, the processor 2801 can store a computer program 2803. The computer program 2803 runs on the processor 2801, and can make the communication apparatus 2800 perform the methods described in the above method embodiments. The computer program 2803 can be fixed in the processor 2801. In this case, the processor 2801 can be implemented by hardware.

[0330] In an implementation, the communication apparatus 2800 can include circuitry that can implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processor and the transceiver described in the present application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and the transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0331] The communication apparatus in the above embodiments can be a network device or a terminal device, but the scope of the communication apparatus described in the present application is not limited thereto, and the structure of the communication apparatus can not be limited by Figure 28 The communication apparatus can be a standalone device or can be a part of a larger device. For example, the communication apparatus can be:

[0332] (1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem;

[0333] (2) a set of one or more ICs, optionally including memory elements for storing data and computer program instructions;

[0334] (3) an ASIC, such as a Modem;

[0335] (4) a module that can be embedded within other devices;

[0336] (5) a receiver, a terminal device, a smart terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a car device, a network device, a cloud device, an artificial intelligence device, etc.

[0337] (6) other, etc.

[0338] For the case that the communication device can be a chip or a chip system, reference can be made to Figure 29 a structural diagram of the chip is shown. Figure 29 The chip shown includes a processor 2901 and an interface 2902. Among them, the number of the processor 2901 can be one or more, and the number of the interface 2902 can be multiple.

[0339] Optionally, the chip further includes a memory 2903, which is used to store necessary computer programs and data.

[0340] Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether the function is implemented by hardware or software depends on the specific application and design requirements of the whole system. Those skilled in the art can use various methods to implement the functions for each specific application, but such implementation should not be understood as beyond the scope of protection of the embodiments of the present application.

[0341] The present application also provides a readable storage medium having instructions stored thereon, which, when executed by a computer, implement the functions of any of the above method embodiments.

[0342] The present application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

[0343] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer programs are loaded on a computer and executed, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer programs can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as high-density digital video disc (digital video disc, DVD)), or semiconductor media (such as solid state disk (solid state disk, SSD)) and the like.

[0344] Those skilled in the art can understand that the first, second, etc. various numerical designations involved in the present application are only for the convenience of description, and do not limit the scope of the embodiments of the present application, nor indicate the order.

[0345] At least one of the present application can also be described as one or more, and the plurality can be two, three, four or more, which is not limited in the present application. In the embodiments of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D". There is no order or size order between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0346] The correspondence relationship shown in each table in the present application can be configured or predefined. The values of the information in each table are merely examples, and other values can be configured, and the present application is not limited thereto. When configuring the correspondence relationship of the information and each parameter, it is not necessarily required to configure all the correspondence relationships shown in each table. For example, the correspondence relationship shown in some rows in the table in the present application can also not be configured. For another example, the above tables can be appropriately deformed, for example, split, merged, and the like. The names of the parameters shown in the titles of the above tables can also use other names understandable by the communication device, and the values or representation manners of the parameters can also use other values or representation manners understandable by the communication device. The above tables can also use other data structures when implemented, for example, an array, a queue, a container, a stack, a linear table, a pointer, a linked list, a tree, a graph, a structure, a class, a heap, a hash table, or the like.

[0347] The predefinition in the present application can be understood as defining, predefining, storing, pre-storing, pre-negotiating, pre-configuring, solidifying, or pre-burning.

[0348] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0349] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device, and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0350] The above is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining information, characterized in that, Executed by the terminal device, including: Receive configuration information and indication information; wherein, the configuration information is used to configure the transmission method of the Physical Downlink Shared Channel (PDSCH), and the indication information is used to indicate at least one joint transmission configuration indication state (joint TCI state) and / or at least one downlink DL TCI state, wherein the at least one joint TCI state and / or at least one DL TCI state includes a TCI state for PDSCH transmission; In response to the PDSCH transmission method configured by the configuration information as the target transmission method, the TCI state for physical downlink control channel PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state is determined. The determination of the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state includes at least one of the following: Based on the first signaling sent by the network device, the first TCI state among at least one joint TCI state and / or at least one DL TCI state indicated by the indication information is determined as the TCI state for PDCCH transmission and / or downlink signal transmission. The second signaling sent by the network device determines the first TCI state and the second TCI state in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information as the TCI state for PDCCH transmission and / or downlink signal transmission. The target transmission method is coherent joint transmission (CJT), and the joint TCI state and / or DL ​​TCI state includes quasi-co-location type QCL Type A.

2. The method as described in claim 1, characterized in that, The indication information is carried in the first media access control layer control unit (MAC CE); the first MAC CE is used to indicate at least one joint TCI state and / or at least one DLTCI state.

3. The method as described in claim 2, characterized in that, The TCI state indicated by the first MAC CE corresponds to the same codepoint, and the information field corresponding to the codepoint is included in the first downlink control information (DCI).

4. The method as described in claim 1, characterized in that, The indication information is carried in the second MAC CE; the second MAC CE is used to indicate at least one joint TCI state and / or at least one DLTCI state corresponding to multiple codepoints respectively; The method further includes: Receive a second DCI, which is used to indicate one of the plurality of codepoints.

5. The method as described in claim 1, characterized in that, The configuration information is carried in the Radio Resource Control (RRC); the RRC is used to configure the transmission method of the PDSCH.

6. The method as described in claim 5, characterized in that, The method further includes: Receive a third MAC CE; wherein the third MAC CE is used to indicate the number of joint TCI states and / or DL ​​TCI states corresponding to the PDSCH; or The third MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state, wherein the TCI state indicated by the third MAC CE corresponds to the same codepoint, and the information field corresponding to the codepoint is contained in the third DCI.

7. The method as described in claim 5, characterized in that, The method further includes: Receive the fourth DCI; wherein the fourth DCI is used to indicate the number of joint TCI states and / or DL ​​TCI states corresponding to the PDSCH; or The fourth DCI is used to indicate a codepoint, which corresponds to at least one joint TCI state and / or at least one DLTCI state among the joint TCI state and / or DL ​​TCI state indicated by the indication information.

8. The method as described in claim 5, characterized in that, The method further includes: Receive a fourth MAC CE and a fifth DCI; wherein, the fourth MAC CE is used to indicate at least one first value, the first value being a candidate value for the number of joint TCI states and / or DL ​​TCI states corresponding to PDSCH; the fifth DCI is used to indicate a codepoint, the codepoint corresponding to one of the first values; or The fourth MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to the plurality of codepoints, and the fifth DCI is used to indicate one of the plurality of codepoints.

9. The method as described in claim 1, characterized in that, The determination of the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state further includes at least one of the following: Based on the default rules, the first TCI state among at least one joint TCI state and / or at least one DLTCI state indicated by the indication information is determined as the TCI state for PDCCH transmission and / or downlink signal transmission; Based on the default rules, the first TCI state and the second TCI state in at least one joint TCI state and / or at least one DLTCI state indicated by the indication information are determined as the TCI state for PDCCH transmission and / or downlink signal transmission. Based on the third signaling and / or default rules sent by the network device, one or both of the first two TCI states in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information are determined as the TCI state for PDCCH transmission and / or downlink signal transmission.

10. The method as described in claim 1 or 9, characterized in that, The joint TCI state and / or DL ​​TCI state also include QCL Type B.

11. The method as described in claim 9, characterized in that, The joint TCI state and / or DL ​​TCI state includes a quasi-co-location type, which includes at least one of the following parameters: Average latency; Latency spread; Doppler shift; Doppler extension.

12. The method as described in claim 9, characterized in that, The first TCI state is the first TCI state among all TCI states indicated by the indication message; or The first TCI state is the first TCI state that contains the target QCL Type among all the TCI states indicated by the indication information.

13. The method as described in claim 9, characterized in that, The second TCI state is the second TCI state among all the TCI states indicated by the instruction message; or The second TCI state is the second TCI state among all TCI states indicated by the indication information that contains the target QCL Type.

14. The method as described in claim 9, characterized in that, The first two TCI states are the first two TCI states among all the TCI states indicated by the instruction message; or The first two TCI states are the first two TCI states that contain the target QCL Type among all the TCI states indicated by the indication information.

15. The method as described in claim 12, 13, or 14, characterized in that, The target QCL Type includes either QCL Type A or QCL Type B.

16. The method as described in claim 1, characterized in that, Determining the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state includes: Based on the fourth signaling and / or default rules sent by the network device, one or more of the TCI states indicated by the indication information are determined as TCI states for PDCCH transmission and / or downlink signal transmission.

17. The method as described in claim 9 or 16, characterized in that, The first signaling, second signaling, third signaling, or fourth signaling includes at least one of the following: RRC; MAC CE; DCI.

18. The method as described in claim 1, characterized in that, Determining the TCI state used for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state includes: The TCI state used for PDCCH transmission in the at least one joint TCI state and / or at least one DL TCI state, and the TCI state used for downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state, are determined respectively.

19. The method according to any one of claims 1-18, characterized in that, The downlink signal includes at least one of the following: Channel State Information Reference Signal (CSI-RS); Demodulation reference signal DMRS; Positioning reference signal PRS; Track the reference signal TRS.

20. A method for determining information, characterized in that, Executed by network devices, including: Send configuration information and indication information; wherein, the configuration information is used to configure the transmission method of PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink DL TCI state, wherein the at least one joint TCI state and / or at least one DL TCI state includes a TCI state for PDSCH transmission; The method further includes at least one of the following: Send a first signaling message to the terminal device; the first signaling message is used to indicate that the first TCI state among at least one joint TCI state and / or at least one DL TCI state indicated by the indication information is determined as the TCI state for PDCCH transmission and / or downlink signal transmission; Send a second signaling message to the terminal device; the second signaling message is used to indicate that the first TCI state and the second TCI state in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information are determined as TCI states for PDCCH transmission and / or downlink signal transmission; Wherein, the transmission method of PDSCH configured in the configuration information is the target transmission method, the target transmission method is coherent joint transmission (CJT), and the joint TCI state and / or DL ​​TCI state includes quasi-co-location type QCL Type A.

21. The method as described in claim 20, characterized in that, The indication information is carried in the first MAC CE; the first MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state.

22. The method as described in claim 20, characterized in that, The TCI state indicated by the first MAC CE corresponds to the same codepoint, and the information field corresponding to the codepoint is contained in the first DCI.

23. The method as described in claim 20, characterized in that, The indication information is carried in the second MAC CE; wherein the second MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to the multiple codepoints respectively; The method further includes: sending a second DCI; the second DCI is used to indicate one of the plurality of codepoints.

24. The method as described in claim 20, characterized in that, The configuration information is carried in the RRC; the RRC is used to configure the transmission method of PDSCH.

25. The method as described in claim 24, characterized in that, The method further includes: Send a third MAC CE; wherein the third MAC CE is used to indicate the number of joint TCI states and / or DL ​​TCI states corresponding to the PDSCH; or The third MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state. The TCI states indicated by the third MAC CE all correspond to the same codepoint, and the information field corresponding to the codepoint is contained in the third DCI.

26. The method as described in claim 24, characterized in that, The method also includes: Send the fourth DCI; wherein the fourth DCI is used to indicate the number of joint TCI states and / or DL ​​TCI states corresponding to the PDSCH; or The fourth DCI is used to indicate a codepoint, which corresponds to at least one joint TCI state and / or at least one DLTCI state among the joint TCI state and / or DL ​​TCI state indicated by the indication information.

27. The method as described in claim 20, characterized in that, The method further includes: Send a fourth MAC CE and a fifth DCI; wherein, the fourth MAC CE is used to indicate at least one first value, the first value being a candidate value for the number of joint TCI states and / or DL ​​TCI states corresponding to PDSCH; the fifth DCI is used to indicate a codepoint, the codepoint corresponding to one of the first values; or The fourth MAC CE is used to indicate at least one joint TCI state and / or at least one DL TCI state corresponding to the plurality of codepoints, and the fifth DCI is used to indicate one of the plurality of codepoints.

28. The method as described in claim 20, characterized in that, The method further includes: Send a third signaling message to the terminal device; the third signaling message is used to indicate that one or both of the first two TCI states of at least one joint TCI state and / or at least one DL TCI state indicated by the indication information are determined as TCI states for PDCCH transmission and / or downlink signal transmission.

29. The method as described in claim 28, characterized in that, The joint TCI state and / or DL ​​TCI state also include quasi-co-location type Type B.

30. The method as described in claim 28, characterized in that, The joint TCI state and / or DL ​​TCI state includes a quasi-co-location type, which includes at least one of the following parameters: Average latency; Latency spread; Doppler shift; Doppler extension.

31. The method as described in claim 20, characterized in that, The first TCI state is the first TCI state among all TCI states indicated by the indication message; or The first TCI state is the first TCI state that contains the target QCL Type among all the TCI states indicated by the indication information.

32. The method as described in claim 28, characterized in that, The second TCI state is the second TCI state among all the TCI states indicated by the instruction message; or The second TCI state is the second TCI state among all the TCI states indicated by the indication information that contains the target QCL Type.

33. The method as described in claim 28, characterized in that, The first two TCI states are the first two TCI states among all the TCI states indicated by the instruction message; or The first two TCI states are the first two TCI states that contain the target QCL Type among all the TCI states indicated by the indication information.

34. The method as described in claim 31, 32, or 33, characterized in that, The target QCL Type includes either QCL Type A or QCL Type B.

35. The method as described in claim 20, characterized in that, The method further includes: Send a fourth signaling message to the terminal device; the fourth signaling message is used to indicate that one or more of the TCI states indicated by the indication information at least one joint TCI state and / or at least one DL TCI state are determined as TCI states for PDCCH transmission and / or downlink signal transmission.

36. The method as described in claim 28 or 35, characterized in that, The first signaling, second signaling, third signaling, or fourth signaling includes at least one of the following: RRC; MAC CE; DCI.

37. The method as described in claim 20, characterized in that, The network device is used to indicate to the terminal device the TCI state for PDCCH transmission in the at least one joint TCI state and / or at least one DL TCI state, and the TCI state for downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state.

38. The method according to any one of claims 20-37, characterized in that, The downlink signal includes at least one of the following: CSI-RS; DMRS; PRS; TRS.

39. A communication device configured in a terminal device, comprising: A transceiver module is used to receive configuration information and indication information; wherein, the configuration information is used to configure the transmission method of PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink DL TCI state, wherein the at least one joint TCI state and / or at least one DL TCI state includes a TCI state for PDSCH transmission; The processing module is configured to determine the TCI state for PDCCH transmission and / or downlink signal transmission in the at least one joint TCI state and / or at least one DL TCI state in response to the PDSCH transmission method configured by the configuration information as the target transmission method. The processing module is further configured to perform at least one of the following: Based on the first signaling sent by the network device, the first TCI state among at least one joint TCI state and / or at least one DL TCI state indicated by the indication information is determined as the TCI state for PDCCH transmission and / or downlink signal transmission. The second signaling sent by the network device determines the first TCI state and the second TCI state in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information as the TCI state for PDCCH transmission and / or downlink signal transmission. The target transmission method is coherent joint transmission (CJT), and the joint TCI state and / or DL ​​TCI state includes quasi-co-location type QCL Type A.

40. A communication device configured in a network device, comprising: A transceiver module is used to send configuration information and indication information; wherein, the configuration information is used to configure the transmission method of PDSCH, and the indication information is used to indicate at least one joint TCI state and / or at least one downlink DL TCI state, wherein the at least one joint TCI state and / or at least one DL TCI state includes a TCI state for PDSCH transmission; The communication device is also used for at least one of the following: Send a first signaling message to the terminal device; the first signaling message is used to indicate that the first TCI state among at least one joint TCI state and / or at least one DL TCI state indicated by the indication information is determined as the TCI state for PDCCH transmission and / or downlink signal transmission; Send a second signaling message to the terminal device; the second signaling message is used to indicate that the first TCI state and the second TCI state in at least one joint TCI state and / or at least one DL TCI state indicated by the indication information are determined as TCI states for PDCCH transmission and / or downlink signal transmission; Wherein, the transmission method of PDSCH configured in the configuration information is the target transmission method, the target transmission method is coherent joint transmission (CJT), and the joint TCI state and / or DL ​​TCI state includes quasi-co-location type QCL Type A.

41. A communication device, characterized in that, The device includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory to cause the device to perform the method as claimed in any one of claims 1 to 19, or the processor executes the computer program stored in the memory to cause the device to perform the method as claimed in any one of claims 20 to 38.

42. A communication device, characterized in that, include: Processor and interface circuitry, among which The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to execute the code instructions to perform the method as claimed in any one of claims 1 to 19, or to execute the code instructions to perform the method as claimed in any one of claims 20 to 38.

43. A computer-readable storage medium for storing instructions that, when executed, cause the method of any one of claims 1 to 19 to be implemented, or, when executed, cause the method of any one of claims 20 to 38 to be implemented.

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