A transmission configuration indication state determination method, apparatus, device, and storage medium

Abstract

The present disclosure relates to a transmission configuration indication state (TCI state) determination method, apparatus, device and storage medium, comprising: receiving first information, the first information being used to determine N sets of unified TCI states, N being a positive integer; receiving second information, the second information being used to determine that a physical downlink shared channel (PDSCH) and / or a demodulation reference signal (DMRS) corresponding to the PDSCH is configured to communicate by using a specified scheme; and determining, under a specified condition, the PDSCH and / or the DMRS corresponding to the PDSCH, the corresponding TCI state being at least one set of the N sets of unified TCI states. In the case of configuring the specified scheme for communication, it is determined to communicate by using at least one set of the indicated multiple sets of TCI states. The flexibility of data transmission based on the unified TCI state is improved, and the performance of data transmission and / or reception is further improved.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a method, apparatus, device and storage medium for determining the status of a transmission configuration indication (TCI). Background Technology

[0002] In new radio networks (NR), especially when the communication frequency band is in frequency range 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels.

[0003] Typically, the physical downlink control channel (PDCCH) and / or its demodulation reference signal (DMRS), and the physical uplink control channel (PUCCH) and / or its DMRS, activate their respective beams via the medium access control element (MAC CE). The physical downlink shared channel (PDSCH) and / or its DMRS, and the physical uplink shared channel (PUSCH) and / or its DMRS, indicate their respective beams via downlink control information (DCI) signaling. These beams can be indicated using TCI status or spatial-relation information.

[0004] In some technologies, a unified TCI state has been proposed to reduce signaling overhead. The unified TCI state can be used to simultaneously indicate the TCI state used by the terminal to receive PDCCH and / or the DMRS of PDCCH, PDSCH and / or the DMRS of PDSCH, and / or the TCI state used by the terminal to transmit PUCCH and / or the DMRS of PUCCH, PUSCH and / or PUSCH. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this disclosure provides a TCI status determination method, apparatus, device and storage medium.

[0006] According to a first aspect of the present disclosure, a TCI state determination method is provided. The method is executed by a terminal and includes: receiving first information, the first information being used to determine N sets of unified TCI states, where N is a positive integer; receiving second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme; and determining that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one set of unified TCI states among the N sets of unified TCI states.

[0007] In some implementations, the DMRS corresponding to PDSCH and / or PDSCH is determined to be at least one of the N unified TCI states when at least one of the following conditions is met: the DMRS corresponding to PDSCH and / or PDSCH is scheduled by DCI format 1_0; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that the DMRS corresponding to PDSCH and / or PDSCH adopts at least one of the N unified TCI states; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the DMRS corresponding to PDSCH and / or PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0008] In some embodiments, the method further includes: receiving third information, the third information being used to configure a channel measurement resource (CMR); determining the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the corresponding TCI state is at least one set of unified TCI states from N sets of unified TCI states, including: when the CMR includes a non-zero power channel state information reference signal (NZP CSI-RS) resource, determining one set of unified TCI states from N sets of unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH; when the CMR includes multiple NZP CSI-RS resources, determining one of the multiple NZP CSI-RS resources to select, and determining one set of unified TCI states from N sets of unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH; when the CMR includes multiple NZP CSI-RS resources, determining at least two NZP CSI-RS resources from multiple NZP CSI-RS resources to select. In the case of CSI-RS resources, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when CMR includes multiple NZP CSI-RS resources and the network device configuration terminal does not select NZP CSI-RS resources, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0009] In some implementations, determining that the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH is at least one of the N unified TCI states includes: when the terminal does not support dynamic switching between a specified scheme and a single transmit / receive point (S-TRP) communication scheme, determining that at least two of the N unified TCI states are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH, wherein the specified scheme uses M-TRP communication; or, when the terminal supports dynamic switching between a specified scheme and an S-TRP communication scheme, determining that one of the N unified TCI states is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0010] In some implementations, the method further includes: receiving third information for configuring a CMR; in cases where the terminal does not support dynamic switching between a specified scheme and an S-TRP communication scheme, the terminal selects more than one NZP CSI-RS resource from multiple NZP CSI-RS resources, and the CMR includes multiple NZP CSI-RS resources, wherein the specified scheme uses M-TRP communication.

[0011] In some implementations, the method further includes sending a fourth message indicating whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0012] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0013] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0014] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0015] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0016] In some implementations, the second information is carried by Radio Resource Control (RRC) signaling; and / or, the second information is carried by a third MAC CE.

[0017] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state; and an uplink TCI state.

[0018] In some implementations, the method further includes sending a fifth message, which indicates the NZP CSI-RS resource selected by the terminal.

[0019] According to a second aspect of the present disclosure, a TCI status determination method is provided. The method is executed by a network device and includes: sending first information, the first information being used to determine N sets of unified TCI status, where N is a positive integer; and sending second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0020] In some implementations, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by DCI format 1_0; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that PDSCH and / or the DMRS corresponding to PDSCH adopt at least one unified TCI state from N unified TCI states; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the DMRS corresponding to PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0021] In some embodiments, the method further includes: sending third information for configuring a channel measurement resource (CMR); the CMR includes a non-zero power channel state information reference signal (NZP CSI-RS) resource; the CMR includes multiple NZP CSI-RS resources, and the network device is not configured to allow the terminal to select NZP CSI-RS resources; the CMR includes multiple NZP CSI-RS resources, and the network device is configured to allow the terminal to select NZP CSI-RS resources.

[0022] In some implementations, the method further includes receiving fourth information, which indicates whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0023] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0024] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0025] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0026] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0027] In some implementations, the second information is carried by Radio Resource Control (RRC) signaling; and / or, the second information is carried by a third MAC CE.

[0028] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state and an uplink TCI state.

[0029] In some implementations, the method further includes receiving fifth information, which indicates the NZP CSI-RS resource selected by the terminal.

[0030] According to a third aspect of the present disclosure, a TCI state determination apparatus is provided. The apparatus includes: a receiving module, configured to receive first information, the first information being used to determine N sets of unified TCI states, where N is a positive integer; the receiving module is further configured to receive second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme; and a processing module, configured to determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one set of unified TCI states among the N sets of unified TCI states.

[0031] In some implementations, the DMRS corresponding to PDSCH and / or PDSCH is determined to be at least one of the N unified TCI states when at least one of the following conditions is met: the DMRS corresponding to PDSCH and / or PDSCH is scheduled by DCI format 1_0; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that the DMRS corresponding to PDSCH and / or PDSCH adopts at least one of the N unified TCI states; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the DMRS corresponding to PDSCH and / or PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0032] In some implementations, the receiving module is further configured to: receive third information, the third information being used to configure a CMR; the processing module is further configured to: when the CMR includes one NZP CSI-RS resource, determine one set of unified TCI states from among N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP CSI-RS resources, and it is determined that one of the multiple NZP CSI-RS resources should be selected, determine one set of unified TCI states from among N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP CSI-RS resources, and it is determined that at least two of the multiple NZP CSI-RS resources should be selected, determine at least two sets of unified TCI states from among N sets of unified TCI states as the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP CSI-RS resources, and the network device configuration terminal does not perform NZP... When selecting CSI-RS resources, at least two sets of unified TCI states from the N sets of unified TCI states are determined to be PDSCH and / or the TCI states corresponding to the DMRS corresponding to PDSCH.

[0033] In some implementations, the processing module is further configured to: determine at least two unified TCI states from the N unified TCI states as the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH when the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, wherein the specified scheme uses M-TRP communication; or, when the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, determine one unified TCI state from the N unified TCI states as the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0034] In some implementations, the receiving module is further configured to: receive third information, which is used to configure a CMR; when the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, the terminal selects more than one NZP CSI-RS resource from multiple NZP CSI-RS resources, and the CMR includes multiple NZP CSI-RS resources, wherein the specified scheme uses M-TRP communication.

[0035] In some embodiments, the apparatus further includes a transmitting module for transmitting fourth information, the fourth information being used to indicate whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0036] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0037] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0038] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0039] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0040] In some implementations, the second information is carried via RRC signaling; and / or, the second information is carried via a third MAC CE.

[0041] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state and an uplink TCI state.

[0042] In some implementations, the sending module is also used to: send fifth information, which indicates the NZP CSI-RS resource selected by the terminal.

[0043] According to a fourth aspect of the present disclosure, a TCI status determination apparatus is provided. The apparatus includes: a sending module, configured to send first information, the first information being used to determine N sets of unified TCI status, where N is a positive integer; the sending module is further configured to send second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0044] In some implementations, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by DCI format 1_0; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that PDSCH and / or the DMRS corresponding to PDSCH adopt at least one unified TCI state from N unified TCI states; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the DMRS corresponding to PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0045] In some implementations, the sending module is further configured to: send third information, the third information being used to configure a CMR; the CMR includes one NZP CSI-RS resource; the CMR includes multiple NZP CSI-RS resources, and the network device is not configured to allow the terminal to select NZP CSI-RS resources; the CMR includes multiple NZP CSI-RS resources, and the network device is configured to allow the terminal to select NZP CSI-RS resources.

[0046] In some embodiments, the apparatus further includes a receiving module for receiving fourth information, the fourth information indicating whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0047] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0048] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0049] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0050] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0051] In some implementations, the second information is carried via RRC signaling; and / or, the second information is carried via a third MAC CE.

[0052] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state; and an uplink TCI state.

[0053] In some implementations, the receiving module is further configured to: receive fifth information, which indicates the NZP CSI-RS resource selected by the terminal.

[0054] According to a fifth aspect of the present disclosure, a TCI state determination device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the first aspect and any one of the methods in the first aspect.

[0055] According to a sixth aspect of the present disclosure, a TCI state determination device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the second aspect and any one of the methods in the second aspect.

[0056] According to a seventh aspect of the present disclosure, a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of a terminal, enables the terminal to perform the first aspect and any one of the methods in the first aspect.

[0057] According to an eighth aspect of the present disclosure, a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of a network device, enables the network device to perform the second aspect and any one of the methods in the second aspect.

[0058] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: when configuring a specified scheme for communication, it is determined that at least one set of TCI states from multiple indicated TCI states will be used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0059] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0060] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0061] Figure 1 This is a schematic diagram of a wireless communication system according to an exemplary embodiment.

[0062] Figure 2 This is a flowchart illustrating a TCI state determination method according to an exemplary embodiment.

[0063] Figure 3 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment.

[0064] Figure 4 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment.

[0065] Figure 5 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment.

[0066] Figure 6 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment.

[0067] Figure 7 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment.

[0068] Figure 8 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment.

[0069] Figure 9 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment.

[0070] Figure 10 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment.

[0071] Figure 11 This is a schematic diagram of a TCI state determination device according to an exemplary embodiment.

[0072] Figure 12 This is a schematic diagram of another TCI state determination device according to an exemplary embodiment.

[0073] Figure 13 This is a schematic diagram of a TCI state determination device according to an exemplary embodiment.

[0074] Figure 14This is a schematic diagram of another TCI state determination device according to an exemplary embodiment. Detailed Implementation

[0075] 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 numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure.

[0076] The communication methods disclosed herein can be applied to Figure 1 The wireless communication system 100 shown may include network device 110 and terminal 120. It is understood that... Figure 1 The wireless communication system shown is for illustrative purposes only. A wireless communication system may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices. Figure 1 Not shown in the diagram. This disclosure does not limit the number of network devices and terminals included in the wireless communication system.

[0077] It is further understood that the wireless communication system of this disclosure is a network providing wireless communication functionality. The wireless communication system can employ different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier-frequency division multiple access (SC-FDMA), and carrier sense multiple access with collision avoidance. Based on factors such as capacity, speed, and latency, networks can be categorized as 2G, 3G, 4G, or future evolution networks, such as the 5th generation wireless communication system (5G) network, which can also be referred to as NR. For ease of description, this disclosure may sometimes simply refer to the wireless communication network as a network.

[0078] Furthermore, the network device 110 involved in this disclosure can also be referred to as a wireless access network device. This wireless access network device can be: a base station, an evolved Node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a TRP, etc. It can also be a gNB in ​​an NR system, or it can be a component or part of a base station. When it is a vehicle-to-everything (V2X) communication system, the network device can also be an in-vehicle device. It should be understood that the specific technologies and specific device forms used in the embodiments of this disclosure are not limited.

[0079] Furthermore, the terminal 120 involved in this disclosure can also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to a user. For example, the terminal can be a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals include: smartphones, pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablets, wearable devices, or in-vehicle devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device can also be an in-vehicle device. It should be understood that the embodiments of this disclosure do not limit the specific technology or specific device form adopted by the terminal.

[0080] In this embodiment, network device 110 and terminal 120 can employ any feasible wireless communication technology to transmit data to each other. The transmission channel corresponding to network device 110 sending data to terminal 120 is called the downlink channel (DL), and the transmission channel corresponding to terminal 120 sending data to network device 110 is called the uplink channel (UL). It is understood that the network device involved in this embodiment can be a base station. Of course, the network device can also be any other possible network device, and the terminal can be any possible terminal; this disclosure does not impose any limitations.

[0081] In NR, especially when the communication frequency band is in frequency range 2, high-frequency channels attenuate quickly, so beam-based transmission and reception are required to ensure coverage.

[0082] In Release Rel 16, the beams used for transmission of PDCCH and / or its DMRS, PDSCH and / or its DMRS, PUCCH and / or its DMRS, PUSCH and / or its DMRS, and / or reference signals are all independently indicated. Reference signals may include channel state information reference signals (CSI-RS), sounding reference signals (SRS), positioning reference signals (PRS), tracking reference signals (TRS), etc. For example, CSI-RS may include CSI-RS for channel state information measurement, CSI-RS for beam measurement, or CSI-RS for path loss estimation. SRS may include SRS for codebook-based or non-codebook-based channel state information measurement, SRS for beam measurement, SRS for antenna switching, or SRS for positioning measurement.

[0083] Typically, in traditional methods, the transmission of PDCCH and / or PDCCH DMRS, and PUCCH and / or PUCCH DMRS is activated by MAC CE to activate a beam, while the transmission of PDSCH and / or PDSCH DMRS, and PUSCH and / or PUSCH DMRS is indicated by DCI signaling for their respective beams.

[0084] To reduce signaling overhead, Rel-17 proposed using a unified TCI state. Currently, the unified TCI state can be indicated separately for uplink and downlink, such as a downlink TCI state and an uplink TCI state. The unified TCI state can also be a joint uplink / downlink indication, such as a joint TCI state. For example, if a network device indicates a downlink TCI state for downlink transmission, this downlink TCI state can be used for the transmission of the terminal's PDSCH and / or PDSCH DMRS, PDCCH and / or PDCCH DMRS, and at least a portion of the CSI-RS. The aforementioned at least a portion of the CSI-RS can be aperiodic CSI-RS. As another example, if a network device indicates an uplink TCI state for uplink transmission, this uplink TCI state can be used for the transmission of the terminal's PUSCH and / or PUSCH DMRS, PUCCH and / or PUCCH DMRS, and at least a portion of the SRS. For example, if a network device indicates a joint TCI state, that joint TCI state can be used simultaneously for the transmission of uplink and downlink channels and / or reference signals.

[0085] It should be noted that "transmission" in this disclosure may be considered to include sending and / or receiving.

[0086] It is understandable that the TCI state can be used to indicate which receive beams the terminal uses when receiving PDCCH and / or PDCCH DMRS, and / or PDSCH and / or PDSCH DMRS. For example, the receive beam corresponding to the same transmit beam as the synchronization signal and physical broadcast channel block (SSB) or CSI-RS sent by the network device. That is, the PDCCH and / or PDCCH DMRS, and / or PDSCH and / or PDSCH DMRS are quasi-co-addressable with the SSB or CSI-RS. The TCI state can also be used to indicate which transmit beams the terminal uses when transmitting PUCCH and / or PUCCH DMRS, and / or PUSCH and / or PUSCH DMRS. For example, the transmit beam corresponding to the same receive beam as the SSB or CSI-RS sent by the network device, or the transmit beam corresponding to the same SRS sent by the terminal. That is, PUCCH and / or the DMRS of PUCCH, and / or PUSCH and / or the DMRS of PUSCH, are quasi-co-located with SSB, CSI-RS, or SRS. Among them, beam refers to quasi-co-location (QCL) type D.

[0087] The aforementioned beams can be indicated by TCI status or spatial relation information. Specifically, the TCI status corresponding to the PDCCH includes the TCI status corresponding to the PDCCH and / or the PDCCH DMRS; that is, this TCI status is used for the reception of the PDCCH and / or the PDCCH DMRS. Similarly, the TCI state corresponding to PDSCH includes the TCI state corresponding to PDSCH and / or PDSCH DMRS, meaning that the TCI state is used for receiving PDSCH and / or PDSCH DMRS; the TCI state or spatialrelationinfo corresponding to PUCCH includes the TCI state or spatialrelationinfo corresponding to PUCCH and / or PUCCH DMRS, meaning that the TCI state or spatialrelationinfo is used for transmitting PUCCH and / or PUCCH DMRS; the TCI state or spatialrelationinfo corresponding to PUSCH includes the TCI state or spatialrelationinfo corresponding to PUSCH and / or PUSCH DMRS, meaning that the TCI state or spatialrelationinfo is used for transmitting PUSCH and / or PUSCH DMRS.

[0088] However, Rel-17 currently only considers a unified TCI state for a single (S)-TRP. That is, it only considers configuring one set of unified TCI states for beam indication. For example, a unified TCI state may include one uplink TCI state and / or one downlink TCI state; or, a unified TCI state may include a joint TCI state. When multiple (M)-TRPs provide transmission services to the terminal, one or more sets of TCI states will be configured accordingly. In this case, how to indicate which sets of unified TCI states to use for each channel or reference signal is currently undetermined.

[0089] In the case of M-TRP, including the S-DCI method, if the PDSCH is configured for coherent joint transmission (CJT), and S-DCI indicates two unified TCI states (e.g., two joint TCI states, two downlink TCI states, and / or two uplink TCI states), then for the PDSCH and / or PDSCH DMRS configured for PDSCH-CJT transmission, it is not indicated which of the two unified TCI states should be used, or both. Therefore, how the terminal should use the TCI states for PDSCH and / or the corresponding DMRS communication is currently undetermined.

[0090] Therefore, this disclosure provides a TCI state determination method, apparatus, device, and storage medium that, when configuring a specified communication scheme, determines to use at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0091] Figure 2 This is a flowchart illustrating a TCI state determination method according to an exemplary embodiment, such as... Figure 2 As shown, the method is executed by the terminal and may include the following steps:

[0092] In step S11, the first information is received.

[0093] In some embodiments, the terminal may receive first information. This first information is used to determine N sets of unified TCI states. N is a positive integer.

[0094] For example, a terminal can receive first information sent by a network device. Based on this first information, the terminal determines N sets of unified TCI states. For instance, the first information could indicate N sets of unified TCI states. Alternatively, the first information could indicate one of multiple codepoints, and the MAC CE could configure N sets of unified TCI states corresponding to each codepoint. This allows the terminal to determine the N sets of unified TCI states corresponding to a codepoint indicated by the first information.

[0095] In some embodiments, N can be 2.

[0096] In some embodiments, the terminal may determine one set of unified TCI states based on the first information. In other embodiments, the terminal may determine multiple sets of unified TCI states based on the first information.

[0097] In some embodiments, the terminal can determine N sets of unified TCI states based on one first piece of information.

[0098] Of course, in other embodiments, the terminal can determine N sets of unified TCI states based on multiple first pieces of information. For example, when N is 5, the terminal can determine 4 sets of unified TCI states based on first information 1 and 1 set of unified TCI states based on first information 2, thereby enabling the terminal to determine 5 sets of unified TCI states based on first information 1 and first information 2.

[0099] For example, when N is 2, the terminal can determine two unified TCI states, including the first and second sets, based on the first information 1, and determine the updated first unified TCI state based on the first information 2. Thus, the terminal can determine two unified TCI states based on the first information 1 and the first information 2, namely, the updated first unified TCI state and the unchanged second unified TCI state.

[0100] In step S12, the second information is received.

[0101] In some embodiments, the terminal may receive second information. This second information is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0102] For example, a terminal can receive second information sent by a network device. Based on the second information, the terminal determines that the PDSCH and / or the DMRS corresponding to the PDSCH is configured to communicate using a specified scheme.

[0103] In some embodiments, the specified scheme may be the CJT scheme.

[0104] In step S13, the PDSCH and / or the DMRS corresponding to the PDSCH are determined, and the corresponding TCI state is at least one of the N unified TCI states.

[0105] In some embodiments, the terminal may determine that the TCI state corresponding to the PDSCH is at least one of the N unified TCI states.

[0106] For example, the terminal can determine specified conditions. When these conditions are met, the terminal can determine at least one unified TCI state from the N unified TCI states determined by the first information. The terminal then identifies the determined at least one unified TCI state as the TCI state corresponding to the PDSCH.

[0107] In some embodiments, under specified conditions, the terminal can determine that the TCI state corresponding to the DMRS corresponding to the PDSCH is at least one of the N unified TCI states.

[0108] For example, if the terminal determines that the specified conditions are met, the terminal can determine at least one unified TCI state from the N unified TCI states determined by the first information. The terminal then identifies the determined at least one unified TCI state as the TCI state corresponding to the DMRS corresponding to the PDSCH.

[0109] In some embodiments, the terminal may, under specified conditions, determine that the TCI state corresponding to the PDSCH is at least one of the N unified TCI states. Also, the terminal may, under specified conditions, determine that the TCI state corresponding to the DMRS corresponding to the PDSCH is at least one of the N unified TCI states.

[0110] For example, if the terminal determines that the specified conditions are met, the terminal can determine at least one unified TCI state from the N unified TCI states determined by the first information. The terminal then identifies the identified at least one unified TCI state as the TCI state corresponding to the PDSCH, and the terminal also identifies the identified at least one unified TCI state as the TCI state corresponding to the DMRS corresponding to the PDSCH.

[0111] It is clear that the terminal can also use at least one set of unified TCI states to receive PDSCH and / or the DMRS corresponding to PDSCH.

[0112] In some embodiments, the specified condition may be a condition where the terminal cannot determine the TCI state corresponding to the received PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI. For example, the DCI itself does not indicate the TCI state corresponding to the received PDSCH and / or the DMRS corresponding to the PDSCH. Alternatively, the DCI may indicate the TCI state corresponding to the received PDSCH and / or the DMRS corresponding to the PDSCH, but the terminal does not have enough time to decode the DCI, making it impossible for the terminal to determine the TCI state corresponding to the received PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI.

[0113] Of course, in some embodiments, if the DCI can instruct the terminal to receive the PDSCH and / or the TCI state corresponding to the DMRS corresponding to the PDSCH, and the terminal can decode the DCI before receiving the PDSCH and / or the DMRS corresponding to the PDSCH to determine the unified TCI state indicated by the DCI, then the terminal can determine, based on the DCI, that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of the N unified TCI states.

[0114] This disclosure, when configuring a specified communication scheme, determines that at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0115] In the TCI state determination method provided in this disclosure embodiment, the DMRS corresponding to PDSCH and / or PDSCH is determined under at least one of the following conditions, and the corresponding TCI state is at least one of the N unified TCI states: PDSCH and / or the DMRS corresponding to PDSCH is scheduled by DCI format 1_0; PDSCH and / or the DMRS corresponding to PDSCH is scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that PDSCH adopts at least one of the N unified TCI states; PDSCH and / or the DMRS corresponding to PDSCH is scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0116] In some embodiments, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by DCI format 1_0.

[0117] For example, a terminal receives a DCI sent by a network device. The DCI format corresponding to this DCI is DCI format 1_0. Based on this DCI format 1_0, the terminal determines the received PDSCH and / or the DMRS corresponding to the PDSCH. Then, the terminal can determine that the specified conditions are met. The terminal can determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of N sets of unified TCI states.

[0118] It is clear that since DCI format 1_0 lacks an indication field for indicating the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, i.e., DCI format 1_0 lacks a first indication field for indicating that the PDSCH adopts at least one of the N unified TCI states, the terminal obviously cannot determine the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on DCI format 1_0. In this case, the terminal can determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of the N unified TCI states based on the N unified TCI states determined by the first information.

[0119] In some embodiments, since there is no first indicator field in DCI format 1_0, the first time interval between DCI format 1_0 and PDSCH can be less than or equal to a time threshold, or the first time interval can be greater than or equal to a time threshold. And / or the second time interval between DCI format 1_0 and the DMRS corresponding to PDSCH can be less than or equal to a time threshold, or the second time interval can be greater than or equal to a time threshold.

[0120] It is understandable that the first time interval is the time between receiving DCI format 1_0 and receiving PDSCH. The second time interval is the time between receiving DCI format 1_0 and receiving the DMRS corresponding to PDSCH. Obviously, regardless of the value of the first and / or second time intervals, the terminal cannot determine the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH based on DCI format 1_0.

[0121] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a first DCI. The terminal can then determine that specified conditions are met. The terminal can determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of N unified TCI states. The first DCI does not include a first indication field. The first indication field is used to indicate that the PDSCH adopts at least one of the N unified TCI states. The DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2.

[0122] For example, a terminal receives a first DCI sent by a network device. The DCI format corresponding to this first DCI can be either DCIformat 1_1 or DCIformat 1_2. Furthermore, the network device configures this first DCI to not include a first indication field. Based on this first DCI, the terminal determines to receive the PDSCH and / or the DMRS corresponding to the PDSCH. Then, the terminal can determine that specified conditions are met.

[0123] It is clear that since the network device configuration does not include a first indication field in the first DCI (i.e., neither DCI format 1_1 nor DCI format 1_2 has a first indication field), the terminal cannot determine the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the first DCI. In this case, the terminal can determine, based on the N sets of unified TCI states determined by the first information, that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of the N sets of unified TCI states.

[0124] In some embodiments, since the first DCI configured by the network device does not contain a first indication field, the third time interval between the first DCI and the PDSCH can be less than or equal to a time threshold, or the third time interval can be greater than or equal to a time threshold. And / or the fourth time interval between the first DCI and the DMRS corresponding to the PDSCH can be less than or equal to a time threshold, or the fourth time interval can be greater than or equal to a time threshold.

[0125] It is understandable that the third time interval is the time interval between receiving the first DCI and receiving the PDSCH. The fourth time interval is the time interval between receiving the first DCI and receiving the DMRS corresponding to the PDSCH. Obviously, regardless of the value of the third and / or fourth time intervals, the terminal cannot determine the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the first DCI.

[0126] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by the second DCI. The terminal can then determine that specified conditions are met. The terminal can determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one of N unified TCI states. The second DCI includes a first indication field, the time interval between the second DCI and the PDSCH and / or the DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format1_1 or DCI format1_2.

[0127] For example, a terminal receives a second DCI sent by a network device. The DCI format corresponding to this second DCI can be either DCIformat 1_1 or DCIformat 1_2. The network device configures this second DCI to include a first indication field, a fifth time interval between the second DCI and the PDSCH that is less than a time threshold, and / or a sixth time interval between the second DCI and the DMRS corresponding to the PDSCH that is less than a time threshold. Based on this second DCI, the terminal determines to receive the PDSCH and / or the DMRS corresponding to the PDSCH. Therefore, the terminal can determine that specified conditions are met.

[0128] It is understood that although the network device is configured with a first indication field for the second DCI, i.e., a first indication field in DCI format 1_1 and / or a first indication field in DCI format 1_2, the fifth time interval is less than the time threshold, and / or the sixth time interval is less than the time threshold. This means that the terminal does not have enough time to decode the second DCI before receiving the PDSCH and / or the DMRS corresponding to the PDSCH. Therefore, in this case, the terminal still cannot determine the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the second DCI. In this situation, the terminal can determine the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH as at least one of the N unified TCI states based on the N unified TCI states determined by the first information.

[0129] This disclosure provides a variety of possible specified conditions to suit different configuration scenarios, determining at least one set of TCI states from multiple indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0130] In the TCI status determination method provided in the embodiments of this disclosure Figure 3 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment. Figure 3 As shown, the method may also include the following steps:

[0131] In step S21, third information is received.

[0132] In some embodiments, the terminal may receive third information. This third information is used to configure a channel measurement resource (CMR). Of course, in other embodiments, the third information may also be used to configure multiple CMRs.

[0133] For example, a terminal receives third information sent by a network device. This third information can be used to configure a CMR.

[0134] For example, the terminal receives third information sent by the network device. This third information can be used to configure multiple CMRs.

[0135] In some embodiments, determining the PDSCH and / or the DMRS corresponding to the PDSCH in S13, where the corresponding TCI state is at least one of the N unified TCI states, may further include the following steps:

[0136] In step S22, if the CMR includes a non-zero power (NZP) CSI-RS resource, determine one set of unified TCI states from among the N sets of unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0137] In some embodiments, when a CMR includes an NZP CSI-RS resource, the terminal determines one set of unified TCI states from N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0138] For example, in a CMR that includes an NZP CSI-RS resource and where N is 2, the terminal determines the first or second unified TCI state in the N unified TCI states as the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0139] Understandably, if a CMR includes only one NZP CSI-RS resource, meaning the network device will only use one TRP or one TRP group corresponding to that one NZP CSI-RS resource to send PDSCH and / or the corresponding DMRS for the terminal, then this one TRP or one TRP group corresponds to only one set of unified TCI states. For example, this set of unified TCI states used to receive PDSCH and / or the corresponding DMRS may include a joint TCI state or a downlink TCI state.

[0140] In some embodiments, when at least one of the multiple CMRs includes multiple NZP CSI-RSs, and each of the CMRs including multiple NZP CSI-RSs includes one NZP CSI-RS resource, the terminal determines one set of unified TCI states from among the N sets of unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0141] For example, when there are multiple CMRs, and at least one CMR includes multiple NZP CSI-RS, each CMR that includes multiple NZP CSI-RS includes one NZP CSI-RS resource. When N is 2, the terminal determines the first or second unified TCI state in the N unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0142] Understandably, if at least one CMR includes multiple NZP CSI-RS, each CMR containing multiple NZP CSI-RS includes only one NZP CSI-RS resource. That is, for each CMR, the network device will only use one TRP or one TRP group corresponding to this one NZP CSI-RS resource to send PDSCH and / or the corresponding DMRS for the terminal. This one TRP or one TRP group then corresponds to only one set of unified TCI states. For example, this set of unified TCI states used to receive PDSCH and / or the corresponding DMRS may include a joint TCI state or a downlink TCI state.

[0143] In step S23, when the CMR includes multiple NZP CSI-RS resources, and it is determined that one of the multiple NZP CSI-RS resources is selected, one set of unified TCI states is determined from the N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0144] In some embodiments, when a CMR includes multiple NZP CSI-RS resources, and the terminal determines to select one of the multiple NZP CSI-RS resources, the terminal determines one set of unified TCI states from N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0145] For example, in a CMR that includes multiple NZP CSI-RS resources, the terminal determines to select one of the multiple NZP CSI-RS resources. When N is 2, the terminal determines the first or second unified TCI state in the N unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0146] Understandably, if a CMR includes multiple NZP CSI-RS resources, the terminal determines which NZP CSI-RS resource to select and informs the network device which one. The network device will then use only one TRP or TRP group corresponding to the selected NZP CSI-RS resource to send PDSCH and / or the corresponding DMRS. This TRP or TRP group corresponds to only one set of unified TCI states. For example, this set of unified TCI states used to receive PDSCH and / or the corresponding DMRS includes a joint TCI state or a downlink TCI state.

[0147] In some embodiments, for multiple CMRs, when at least one CMR includes multiple NZP CSI-RS, and each CMR including multiple NZP CSI-RS includes multiple NZP CSI-RS resources, if the terminal determines to select one of the multiple NZP CSI-RS resources, the terminal determines one set of unified TCI states from N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0148] For example, when there are multiple CMRs, and at least one CMR includes multiple NZP CSI-RS, for each CMR that includes multiple NZP CSI-RS resources, the terminal determines to select one of the multiple NZP CSI-RS resources. And when N is 2, the terminal determines the first or second unified TCI state in the N unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0149] Understandably, if at least one CMR includes multiple NZP CSI-RS, then each CMR includes multiple NZP CSI-RS resources. For each CMR, the terminal determines which NZP CSI-RS resource to select and informs the network device which NZP CSI-RS resource it has selected. The network device will then use only one TRP or one TRP group corresponding to the NZP CSI-RS resource selected by the terminal to send PDSCH and / or the corresponding DMRS. This TRP or TRP group corresponds to only one set of unified TCI states. For example, this set of unified TCI states used to receive PDSCH and / or the corresponding DMRS includes a joint TCI state or a downlink TCI state.

[0150] In some embodiments, when a terminal determines to select one of a plurality of NZP CSI-RS resources, the terminal may also send information indicating the selected NZP CSI-RS resource. For example, the terminal sends indication information to the network device, which indicates that the terminal selects one NZP CSI-RS resource from the plurality of NZP CSI-RS resources.

[0151] It should be understood that the aforementioned instruction information may also be referred to as "first instruction information," "feedback information," "first feedback information," "reporting information," "terminal selection information," etc. This disclosure does not limit the name of the instruction information.

[0152] In step S24, when the CMR includes multiple NZP CSI-RS resources, and it is determined that at least two NZP CSI-RS resources are selected, at least two unified TCI states among the N unified TCI states are determined to be the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0153] In some embodiments, when a CMR includes multiple NZP CSI-RS resources, and the terminal determines to select at least two NZP CSI-RS resources from the multiple NZP CSI-RS resources, the terminal determines at least two unified TCI states from the N unified TCI states, which are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0154] For example, in a CMR that includes multiple NZP CSI-RS resources, the terminal determines to select at least two NZP CSI-RS resources from the multiple NZP CSI-RS resources. When N is 2, the terminal determines two sets of unified TCI states from the N sets of unified TCI states, which are PDSCH and / or the TCI states corresponding to the DMRS corresponding to PDSCH.

[0155] Understandably, if a CMR includes multiple NZP CSI-RS resources, the terminal determines to select A NZP CSI-RS resources from the multiple NZP CSI-RS resources and informs the network device which A NZP CSI-RS resources it has selected. Then, the network device will only use the A TRPs or A TRP groups corresponding to the A NZP CSI-RS resources selected by the terminal to send PDSCH and / or the DMRS corresponding to the PDSCH to the terminal. These A TRPs or A TRP groups correspond to at least two sets of unified TCI states. Here, A is an integer greater than 1. For example, each set of unified TCI states used to receive PDSCH and / or the DMRS corresponding to the PDSCH includes a joint TCI state or a downlink TCI state.

[0156] It is clear that when N is 2, regardless of how many NZP CSI-RS resources the terminal selects from multiple NZP CSI-RS resources—for example, selecting 2, 3, or 4 NZP CSI-RS resources from 4—all selected NZP CSI-RS resources will use only two sets of unified TCI states.

[0157] In some embodiments, for multiple CMRs, when at least one CMR includes multiple NZP CSI-RS, and each CMR including multiple NZP CSI-RS includes multiple NZP CSI-RS resources, if the terminal determines to select at least two NZP CSI-RS resources from the multiple NZP CSI-RS resources, the terminal determines at least two unified TCI states from the N unified TCI states, which are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0158] For example, when there are multiple CMRs, and at least one CMR includes multiple NZP CSI-RS, for each CMR that includes multiple NZP CSI-RS resources, the terminal determines to select at least two NZP CSI-RS resources from the multiple NZP CSI-RS resources. And when N is 2, the terminal determines two sets of unified TCI states from the N sets of unified TCI states, which are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0159] Understandably, if at least one CMR includes multiple NZP CSI-RS, and each CMR includes multiple NZP CSI-RS resources, for each CMR, the terminal determines which A NZP CSI-RS resources to select and informs the network device which A NZP CSI-RS resources it has selected. Then, the network device will only use the A TRPs or A TRP groups corresponding to the A NZP CSI-RS resources selected by the terminal to send PDSCH and / or the corresponding DMRS for the terminal. These A TRPs or A TRP groups correspond to at least two sets of unified TCI states, where A is an integer greater than 1. For example, each set of unified TCI states used to receive PDSCH and / or the corresponding DMRS includes a joint TCI state or a downlink TCI state.

[0160] In some embodiments, when a terminal determines to select at least two NZP CSI-RS resources from a plurality of NZP CSI-RS resources, the terminal may also send information indicating the selected at least two NZP CSI-RS resources. For example, the terminal sends indication information to a network device, which indicates that the terminal has selected at least two NZP CSI-RS resources from a plurality of NZP CSI-RS resources.

[0161] In step S25, if the CMR includes multiple NZP CSI-RS resources and the network device configuration terminal does not select NZPCSI-RS resources, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0162] In some embodiments, when a CMR includes multiple NZP CSI-RS resources and the network device configuration terminal does not need to select NZP CSI-RS resources, the terminal determines at least two sets of unified TCI states from the N sets of unified TCI states, which are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0163] For example, in a CMR that includes multiple NZP CSI-RS resources, and where the network device configuration terminal does not need to select NZPCSI-RS resources, and N is 2, the terminal determines two sets of unified TCI states from the N sets of unified TCI states, namely PDSCH and / or the TCI state corresponding to the DMRS corresponding to PDSCH.

[0164] Understandably, if a CMR includes multiple NZP CSI-RS resources, and the network device configuration terminal does not need to select NZP CSI-RS resources, then the network device will use the multiple TRPs or multiple TRP groups corresponding to the multiple NZP CSI-RS resources included in the CMR to send PDSCH and / or the DMRS corresponding to the PDSCH to the terminal. These multiple TRPs or multiple TRP groups then correspond to at least two sets of unified TCI states. Specifically, each set of unified TCI states used to receive PDSCH and / or the DMRS corresponding to the PDSCH includes a joint TCI state or a downlink TCI state.

[0165] It is clear that when N is 2, for example, a CMR includes 2, 3 or 4 NZP CSI-RS resources, only two sets of unified TCI states are used for multiple NZP CSI-RS resources included in a CMR.

[0166] In some embodiments, when at least one of the multiple CMRs includes multiple NZP CSI-RSs, and each of the CMRs including multiple NZP CSI-RSs includes multiple NZP CSI-RS resources, and the network device configuration terminal does not need to select NZP CSI-RS resources, the terminal determines at least two sets of unified TCI states from the N sets of unified TCI states, which are the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0167] For example, when there are multiple CMRs, and at least one CMR includes multiple NZP CSI-RS, each CMR that includes multiple NZP CSI-RS includes multiple NZP CSI-RS resources, and the network device configuration terminal does not need to select NZP CSI-RS resources, and when N is 2, the terminal determines two sets of unified TCI states out of N sets of unified TCI states, which are PDSCH and / or the TCI states corresponding to the DMRS corresponding to PDSCH.

[0168] Understandably, if for multiple CMRs, at least one CMR includes multiple NZP CSI-RSs, and each CMR including multiple NZP CSI-RSs contains multiple NZP CSI-RS resources, and the network device does not need to select NZP CSI-RS resources when configuring the terminal, then for each CMR, the network device will use the multiple TRPs or multiple TRP groups corresponding to the multiple NZP CSI-RS resources included in that CMR to send PDSCH and / or the DMRS corresponding to the PDSCH to the terminal. These multiple TRPs or multiple TRP groups correspond to at least two sets of unified TCI states. Specifically, each set of unified TCI states used to receive PDSCH and / or the DMRS corresponding to the PDSCH includes a joint TCI state or a downlink TCI state.

[0169] It is clear that when N is 2, for example, when there are multiple CMRs, and at least one CMR includes multiple NZP CSI-RS, for each CMR that includes multiple NZP CSI-RS, which includes 2, 3 or 4 NZP CSI-RS resources, only two sets of unified TCI states are used for the multiple NZP CSI-RS resources included in that CMR.

[0170] This disclosure provides multiple methods for determining at least one TCI state from multiple TCI states under different configuration scenarios, so as to use at least one determined TCI state for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0171] In the TCI state determination method provided in this embodiment, S13 determines that the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH is at least one of the N unified TCI states. This may further include: if the terminal does not support dynamic switching between a specified scheme and an S-TRP communication scheme, determining at least two of the N unified TCI states as the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH, wherein the specified scheme uses M-TRP communication; or, if the terminal supports dynamic switching between a specified scheme and an S-TRP communication scheme, determining one of the N unified TCI states as the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0172] In some embodiments, when the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH, wherein the specified scheme adopts M-TRP communication.

[0173] For example, if the terminal does not support dynamic switching between CJT and S-TRP communication schemes, the terminal determines at least two unified TCI states from N unified TCI states. These at least two unified TCI states are then identified as the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0174] Understandably, if the terminal does not support dynamic switching between CJT and S-TRP communication schemes, meaning the terminal needs to continuously communicate based on the M-TRP communication scheme, then the network device will use multiple TRPs or multiple TRP groups to send PDSCH and / or the corresponding DMRS to the terminal. These multiple TRPs or multiple TRP groups correspond to at least two sets of unified TCI states. For example, each set of unified TCI states used to receive PDSCH and / or the corresponding DMRS includes a joint TCI state or a downlink TCI state.

[0175] It is clear that when N is 2, multiple TRPs or multiple TRP groups correspond to two sets of unified TCI states.

[0176] In this scenario, since the terminal does not support dynamic switching between CJT and S-TRP communication schemes, it only performs CJT communication. In other words, the terminal does not use S-TRP communication. Therefore, the terminal defaults to determining at least two of the N unified TCI states to enable CJT communication.

[0177] In some embodiments, when the terminal supports dynamic switching between a specified scheme and an S-TRP communication scheme, one set of unified TCI states is determined from among N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0178] For example, if the terminal supports dynamic switching between CJT and S-TRP communication schemes, the terminal determines one set of unified TCI states from N sets of unified TCI states. This unified TCI state is then identified as the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0179] Understandably, when a terminal supports dynamic switching between CJT and S-TRP communication schemes, meaning the terminal needs to be able to communicate based on either the M-TRP or S-TRP communication scheme, the network device can default to using one TRP or one TRP group to send PDSCH and / or the corresponding DMRS for the terminal. This TRP or TRP group corresponds to a unified TCI state. For example, a unified TCI state used to receive PDSCH and / or the corresponding DMRS includes a joint TCI state or a downlink TCI state.

[0180] For example, when N is 2, and the terminal supports dynamic switching between CJT and S-TRP communication schemes, the terminal determines the first or second unified TCI state from the N unified TCI states. This first or second unified TCI state is then identified as the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

[0181] In this scenario, since the terminal supports dynamic switching between CJT and S-TRP communication schemes, it can default to using S-TRP communication. That is, the terminal and network device can default to one of N unified TCI states. If the terminal switches to CJT communication in this case, it can dynamically switch between CJT and S-TRP communication schemes based on the DCI indication sent by the network device.

[0182] It is understood that in the above embodiments, the CJT can be a CJT using M-TRP communication. Although there may be a case where a CMR under a CJT only includes one NZP CSI-RS resource, in this case, the CJT is a CJT using S-TRP communication. For a CJT using S-TRP communication, there is no need to implement dynamic switching between CJT and S-TRP, because a CJT using S-TRP communication is itself an S-TRP communication scheme, thus requiring no further switching. Therefore, when the terminal performs dynamic switching between CJT and S-TRP communication schemes, the CJT is usually a CJT using M-TRP communication.

[0183] This disclosure provides multiple methods for determining at least one TCI state from multiple TCI states under different configuration scenarios, so as to use at least one determined TCI state for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0184] In the TCI status determination method provided in the embodiments of this disclosure Figure 4 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment. Figure 4 As shown, the method may also include the following steps:

[0185] In step S31, third information is received.

[0186] In some embodiments, the terminal may receive third information for configuring a CMR.

[0187] Of course, possible implementations of S31 can be found in the descriptions of the various embodiments in S21, which will not be repeated here.

[0188] In some embodiments, when the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, the terminal selects more than one NZP CSI-RS resource from multiple NZP CSI-RS resources, and the CMR includes multiple NZP CSI-RS resources. The specified scheme uses M-TRP communication.

[0189] For example, if the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, meaning the terminal cannot dynamically switch between the specified scheme and the S-TRP communication scheme, then the terminal can determine at least two unified TCI states from N unified TCI states. In other words, the terminal determines multiple unified TCI states. For the specified scheme using M-TRP communication, multiple TCI states correspond to multiple TRPs or multiple TRP groups, and often one TRP or one TRP group corresponds to one NZP CSI-RS resource. Therefore, the number of NZP CSI-RS resources selected by the terminal from multiple NZP CSI-RS resources needs to be greater than one. Furthermore, a single CMR needs to include multiple NZP CSI-RS resources.

[0190] This disclosure allows for determining which NZP CSI-RS a terminal will select under a specified scheme when the terminal does not support dynamic switching between a designated scheme and S-TRP. In this case, communication will be performed using at least one defined TCI state. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0191] In the TCI status determination method provided in the embodiments of this disclosure Figure 5 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment. Figure 5 As shown, the method may also include the following steps:

[0192] In step S41, the fourth message is sent.

[0193] In some embodiments, the terminal may send a fourth piece of information. This fourth piece of information indicates whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme.

[0194] For example, a terminal can send a fourth piece of information to a network device. This fourth piece of information indicates whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme. It can be understood that the terminal informs the network device whether it supports the ability to dynamically switch between the specified scheme and the S-TRP communication scheme by sending this fourth piece of information.

[0195] This disclosure can also report to the network device whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme, so that when the specified scheme is configured for communication, at least one of the indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0196] In the TCI status determination method provided in this embodiment, the specified scheme is CJT.

[0197] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme, such as being configured to communicate using CJT.

[0198] CJT can represent the use of multiple TRPs for joint transmission.

[0199] This disclosure determines that, in the case of communication via CJT, at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0200] In the TCI state determination method provided in this disclosure, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0201] In some embodiments, the specified scheme includes a CMR configured by the network device comprising L NZP CSI-RS resources. Here, L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group.

[0202] It's clear that when L is 1, it means that a CMR includes only one NZP CSI-RS resource, corresponding to only one TRP or one TRP group. In this case, the specified scheme is S-TRP communication. When L is greater than 1, it means that a CMR includes only multiple NZP CSI-RS resources, corresponding to multiple TRPs or multiple TRP groups. In this case, the specified scheme is M-TRP communication.

[0203] Of course, in other embodiments, the specified scheme includes at least one of a plurality of CMRs configured by the network device, which includes L NZP CSI-RS resources.

[0204] For example, L can typically be 1, 2, 3, or 4. That is, a CMR usually includes 1-4 NZP CSI-RS resources.

[0205] For example, when L equals 1, the terminal does not need to select an NZP CSI-RS resource. The network device can directly use the channel corresponding to one NZP CSI-RS resource to perform PDSCH and / or DMRS communication with the terminal. The terminal only needs to perform CSI feedback for that one NZP CSI-RS resource.

[0206] For example, when L is greater than 1, the network device is configured with corresponding restrictions. For instance, the network device might be configured to instruct the terminal not to make a selection. In this case, the terminal does not need to select one or more NZP CSI-RS resources from multiple NZP CSI-RS resources. The network device will use the channels corresponding to these L NZP CSI-RS resources to perform PDSCH and / or DMRS communication with the terminal. The terminal only needs to perform CSI feedback for these L NZP CSI-RS resources.

[0207] For example, when L is greater than 1, the network device has no configuration restrictions. The terminal can then select one or more NZP CSI-RS resources from the L available resources. For instance, the terminal can select K NZP CSI-RS resources from the L available resources. It's clear that K is a positive integer, and K is less than or equal to L. The terminal needs to send an indication message to the network device to inform it which K NZP CSI-RS resources the terminal has selected. The network device can then communicate with the terminal via PDSCH and / or DMRS based on the channels corresponding to these K NZP CSI-RS resources. The terminal only needs to provide CSI feedback for these K NZP CSI-RS resources.

[0208] It is understandable that when a network device is configured with a CMR that includes L NZP CSI-RS resources, it can be assumed that the terminal is using CJT communication.

[0209] In some embodiments, the specified scheme includes independent feedback spatial basis vectors for each NZP CSI-RS resource.

[0210] For example, the terminal independently feeds back the spatial domain (SD) basis vector for each NZP CSI-RS resource. That is, the terminal selects a specified number of H beams from the total number of CSI-RS ports N1*N2. Here, H is a positive integer. N1 represents the number of ports in the first dimension, and N2 represents the number of ports in the second dimension.

[0211] It is understandable that when the terminal independently feeds back the spatial basis vector for each NZP CSI-RS resource, it can be assumed that the terminal uses CJT communication.

[0212] In some embodiments, the specified scheme includes independent feedback frequency domain basis vectors for each NZP CSI-RS resource.

[0213] For example, the terminal independently feeds back a frequency domain (FD) basis vector for each NZP CSI-RS resource. That is, for each NZP CSI-RS resource, the terminal selects v frequency domain basis vectors from N3 frequency domain basis vectors. Here, v is a positive integer, and N3 represents the product of the number of channel quality indicator (CQI) subbands and the number of precoding matrix indicator (PMI) subbands.

[0214] It is understandable that when the terminal independently feeds back the frequency domain basis vector for each NZP CSI-RS resource, it can be assumed that the terminal uses CJT communication.

[0215] In some embodiments, the specified scheme includes feeding back the same frequency domain basis vector for each NZP CSI-RS resource.

[0216] For example, the terminal selects the same frequency domain basis vectors for each NZP CSI-RS resource. That is, for each NZP CSI-RS resource, the terminal selects the same v frequency domain basis vectors from N3 frequency domain basis vectors.

[0217] It is understandable that when the terminal feeds back the same frequency domain basis vector for each NZP CSI-RS resource, it can be assumed that the terminal is using CJT communication.

[0218] In some embodiments, the specified scheme includes configuring multiple TRPs or multiple TRP groups on the network device. It is understood that each TRP or each TRP group corresponds to one NZP CSI-RS resource.

[0219] It is understandable that when a network device is configured with multiple TRPs or multiple TRP groups, it can be assumed that the terminal is using CJT communication.

[0220] This disclosure provides multiple possible scenarios for the specified scheme. This allows for determining at least one set of indicated TCI states to be used for communication when configuring the specified scheme for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0221] In the TCI state determination method provided in this embodiment, the first information is carried by the first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0222] In some embodiments, the first information is carried by a first MAC CE. This first MAC CE can indicate N sets of unified TCI states. The N sets of unified TCI states indicated by the MAC CE can correspond to a code point in the TCI state indication field carried in the DCI.

[0223] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0224] In the TCI state determination method provided in this embodiment, the first information is carried by the second MAC CE and the DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0225] In some embodiments, the first information is carried through a second MAC CE and a DCI. The second MAC CE can indicate N sets of unified TCI states corresponding to each of the multiple code points. The multiple code points can be multiple code points that may exist in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI can indicate one of the multiple code points, thereby indicating the N sets of unified TCI states corresponding to that code point.

[0226] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0227] In the TCI status determination method provided in this embodiment, the second information is carried by radio resource control (RRC) signaling; and / or, the second information is carried by a third MAC CE.

[0228] In some embodiments, the second information is carried via RRC signaling.

[0229] For example, the terminal receives RRC signaling, which is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0230] In some embodiments, the second information is carried via a third MAC CE.

[0231] For example, the terminal receives a third MAC CE, which is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0232] In some embodiments, the second information is carried via RRC signaling and a third MAC CE.

[0233] This disclosure provides one possible implementation of the second information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0234] In the TCI state determination method provided in this disclosure, the unified TCI state includes at least one of the following: joint TCI state; downlink TCI state and uplink TCI state.

[0235] In some embodiments, the unified TCI state includes the joint TCI state.

[0236] The combined TCI state can be used for both DL and UL communication.

[0237] In some embodiments, the unified TCI state includes the downlink TCI state.

[0238] In some embodiments, the unified TCI status includes the uplink TCI status.

[0239] Of course, it should be understood that when a terminal receives PDSCH and / or the corresponding DMRS, the unified TCI status cannot only include the uplink TCI status.

[0240] In some embodiments, the unified TCI state includes a downlink TCI state and an uplink TCI state.

[0241] This disclosure provides multiple representations of a unified TCI state to determine at least one set of indicated TCI states for communication when a specified communication scheme is configured. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0242] In the TCI status determination method provided in the embodiments of this disclosure Figure 6 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment. Figure 6 As shown, the method may also include the following steps:

[0243] In step S51, the fifth message is sent.

[0244] In some embodiments, when a terminal selects at least one TCI state from N unified TCI states, it means that the terminal has selected at least one NZP CSI-RS resource from multiple NZP CSI-RS resources. The terminal may send fifth information describing the selected NZP CSI-RS resources to inform the network device which NZP CSI-RS resources the terminal has selected.

[0245] For example, when a terminal selects at least one TCI state from N unified TCI states, it means that the terminal has selected one or at least two NZP CSI-RS resources from multiple NZP CSI-RS resources. The terminal can send fifth information to the network device to inform it which NZP CSI-RS resource the terminal has selected, or to inform it which at least two NZP CSI-RS resources the terminal has selected. This allows the network device to determine the corresponding TRP based on the NZP CSI-RS resources selected by the terminal and communicate with the terminal.

[0246] This publicly disclosed terminal can also report selected NZP CSI-RS resources to the network device so that, when a specified communication scheme is configured, at least one of the indicated TCI states can be used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0247] Based on the same concept, this disclosure also provides a method for determining the TCI status performed by a network device.

[0248] Figure 7 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment, such as... Figure 7 As shown, the method is executed by a network device and may include the following steps:

[0249] In step S61, the first message is sent.

[0250] In some embodiments, the network device may send first information. This first information is used to determine N sets of unified TCI states. N is a positive integer.

[0251] For example, a network device can send first information to a terminal. This first information is used to determine N unified TCI states. For instance, the first information can indicate N unified TCI states. Alternatively, the first information can indicate one of multiple code points, configuring N unified TCI states corresponding to each code point through MAC CE. This allows the terminal to determine the N unified TCI states corresponding to a code point based on the code point indicated by the first information.

[0252] In some embodiments, N can be 2.

[0253] In some embodiments, the first information is used to determine one set of unified TCI states. In other embodiments, the first information is used to determine multiple sets of unified TCI states.

[0254] In some embodiments, one first piece of information can be configured to determine N sets of unified TCI status.

[0255] Of course, in other embodiments, multiple first information can be configured to determine N sets of unified TCI states. For example, when N is 5, first information 1 can be configured to determine 4 sets of unified TCI states, and first information 2 can be configured to determine 1 set of unified TCI states, thereby achieving the determination of 5 sets of unified TCI states through first information 1 and first information 2 together.

[0256] For example, when N is 2, we can configure first information 1 to determine the two unified TCI states, including the first and second sets, and configure first information 2 to determine the updated first unified TCI state. This allows us to determine the two unified TCI states—including the updated first unified TCI state and the unchanged second unified TCI state—through first information 1 and first information 2.

[0257] In step S62, the second information is sent.

[0258] In some embodiments, the network device may send second information. This second information is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0259] For example, a network device can send a second piece of information to a terminal. This second piece of information is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH is configured to communicate using a specified scheme.

[0260] In some embodiments, the specified scheme may be the CJT scheme.

[0261] In some embodiments, the network device may independently determine the TRP for communicating with the terminal and communicate with the terminal based on the TRP.

[0262] In some embodiments, the network device can receive information sent by the terminal, which indicates which NZP CSI-RS resources the terminal has selected, or can be considered as indicating which TRPs the terminal has selected. The network device can then communicate with the terminal based on the TRPs selected by the terminal.

[0263] It is clear that there is a one-to-one correspondence between NZP CSI-RS resources and TRP.

[0264] This disclosure, when configuring a specified communication scheme, determines that at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0265] In the TCI state determination method provided in this embodiment, the PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by the downlink control information DCI format 1_0; or, the PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format1_1 or DCI format1_2, and the first indication field is used to indicate that the PDSCH and / or the DMRS corresponding to the PDSCH adopts at least one unified TCI state from N unified TCI states; or, the PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the PDSCH and / or the DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0266] It is understood that the various embodiments of how PDSCH and / or the DMRS corresponding to PDSCH are configured and scheduled can be referred to the description of the corresponding embodiments on the terminal side and their related embodiments, and will not be repeated here.

[0267] This disclosure provides possible configuration and scheduling scenarios for PDSCH and / or the corresponding DMRS to be used in different configuration schemes, determining at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0268] In the TCI status determination method provided in the embodiments of this disclosure Figure 8 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment. Figure 8As shown, the method may also include the following steps:

[0269] In step S71, the third message is sent.

[0270] In some embodiments, the network device may send third information. This third information is used to configure a CMR. Of course, in other embodiments, the third information may also be used to configure multiple CMRs.

[0271] For example, a network device sends third-party information to a terminal. This third-party information can be used to configure a CMR.

[0272] For example, a network device sends third-party information to a terminal. This third-party information can be used to configure multiple CMRs.

[0273] In some embodiments, CMR includes an NZP CSI-RS resource.

[0274] In some embodiments, CMR includes multiple NZP CSI-RS resources, and the network device is not configured to allow terminals to select NZP CSI-RS resources.

[0275] In some embodiments, where the CMR includes multiple NZP CSI-RS resources and the network device is not configured to allow the terminal to select an NZP CSI-RS resource, the network device may configure the terminal to determine which NZP CSI-RS resource to select from the multiple NZP CSI-RS resources.

[0276] In some embodiments, where the CMR includes multiple NZP CSI-RS resources and the network device is not configured to allow the terminal to select NZP CSI-RS resources, the network device may configure the terminal to determine to select at least two NZP CSI-RS resources from the multiple NZP CSI-RS resources.

[0277] In some embodiments, CMR includes multiple NZP CSI-RS resources, and the network device configuration terminal does not select NZPCSI-RS resources.

[0278] It is understood that in the above embodiments, when the network device is not configured to not allow the terminal to select NZP CSI-RS resources, it means that the terminal can perform NZP CSI-RS resource selection. However, whether the terminal performs NZP CSI-RS resource selection can be based on the terminal's own situation or indicated by the network device through signaling, and this disclosure does not limit it. Of course, the terminal's own situation may be whether the terminal's hardware device supports the terminal to perform NZP CSI-RS resource selection, or whether the current scenario supports the terminal to perform NZP CSI-RS resource selection, or whether the operator supports the terminal to perform NZP CSI-RS resource selection, etc. The terminal can determine this according to the actual situation, and this disclosure does not limit it.

[0279] It is understood that the above-mentioned CMR includes one or more NZP CSI-RS resources. For the description of the corresponding terminal-side embodiments and their associated embodiments, please refer to the description of the terminal-side embodiments and their associated embodiments. This disclosure will not repeat them here.

[0280] This disclosure provides multiple methods for determining at least one TCI state from multiple TCI states when the number of CMR resources, including NZP CSI-RS resources, varies. This allows communication to be performed using at least one determined TCI state. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0281] In the TCI status determination method provided in the embodiments of this disclosure Figure 9 This is a flowchart illustrating another TCI state determination method according to an exemplary embodiment. Figure 9 As shown, the method may also include the following steps:

[0282] In step S81, the fourth information is received.

[0283] In some embodiments, the network device may receive fourth information. This fourth information indicates whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme.

[0284] For example, a network device can receive a fourth message sent by a terminal. This fourth message indicates whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme. It can be understood that the terminal informs the network device whether it supports the ability to dynamically switch between the specified scheme and the S-TRP communication scheme by sending the fourth message.

[0285] This disclosed network device also has the ability to receive terminal reports regarding whether it supports dynamic switching between a specified scheme and the S-TRP communication scheme. This allows it to determine which TCI state from multiple indicated TCI states to use for communication when the specified scheme is configured for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0286] In the TCI status determination method provided in this embodiment, the specified scheme is CJT.

[0287] It is understood that for the various embodiments of the specified scheme CJT, the descriptions of the various embodiments of the specified scheme CJT on the terminal side and their related embodiments can be referred to, and will not be repeated here.

[0288] This disclosure determines that, in the case of communication via CJT, at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0289] In the TCI state determination method provided in this disclosure, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0290] It is understood that for each embodiment of the specified solution, reference can be made to the description of each embodiment of the specified solution on the terminal side and its associated embodiments, which will not be repeated here.

[0291] This disclosure provides multiple possible scenarios for the specified scheme. This allows for determining at least one set of indicated TCI states to be used for communication when configuring the specified scheme for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0292] In the TCI state determination method provided in this embodiment, the first information is carried by the first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0293] It is understood that, for the various embodiments of the first information, reference can be made to the description of the various embodiments of the terminal-side specified solution and their associated embodiments, which will not be repeated here.

[0294] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0295] In the TCI state determination method provided in this embodiment, the first information is carried by the second MAC CE and the DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0296] It is understood that, for the various embodiments of the first information, reference can be made to the description of the various embodiments of the terminal-side specified solution and their associated embodiments, which will not be repeated here.

[0297] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0298] In the TCI status determination method provided in this embodiment, the second information is carried by RRC signaling; and / or, the second information is carried by a third MAC CE.

[0299] It is understood that for the various embodiments of the second information, reference can be made to the description of the various embodiments of the terminal-side specified scheme and their associated embodiments, which will not be repeated here.

[0300] This disclosure provides one possible implementation of the second information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0301] In the TCI state determination method provided in this disclosure, the unified TCI state includes at least one of the following: joint TCI state; downlink TCI state and uplink TCI state.

[0302] It is understood that for the various embodiments of the unified TCI state, the description of the various embodiments of the unified TCI state on the terminal side and their related embodiments can be referred to, and will not be repeated here.

[0303] In the TCI status determination method provided in the embodiments of this disclosure Figure 10 This is a flowchart illustrating yet another TCI state determination method according to an exemplary embodiment. Figure 10 As shown, the method may also include the following steps:

[0304] In step S91, the fifth information is received.

[0305] In some embodiments, when a terminal selects at least one TCI state from N unified TCI states, it means that the terminal has selected at least one NZP CSI-RS resource from multiple NZP CSI-RS resources. The network device can receive fifth information sent by the terminal, which describes the NZP CSI-RS resources selected by the terminal. This allows the network device to know which NZP CSI-RS resources the terminal has selected.

[0306] For example, when a terminal selects at least one TCI state from N unified TCI states, it means that the terminal has selected one or at least two NZP CSI-RS resources from multiple NZP CSI-RS resources. The terminal can send fifth information to the network device. The network device can receive the fifth information sent by the terminal to determine which NZP CSI-RS resource the terminal has selected, or which at least two NZP CSI-RS resources the terminal has selected. Based on the NZP CSI-RS resources selected by the terminal, the network device can determine the corresponding TRP and communicate with the terminal.

[0307] The terminal network device disclosed herein can also receive selected NZP CSI-RS resources reported by the terminal, so as to determine at least one set of TCI states among the indicated multiple TCI states for communication when a specified scheme is configured for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0308] This disclosure provides multiple representations of a unified TCI state to determine at least one set of indicated TCI states for communication when a specified communication scheme is configured. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0309] It should be noted that those skilled in the art will understand that the various implementation methods / embodiments described above in this disclosure can be used in conjunction with the foregoing embodiments, or they can be used independently. Whether used alone or in conjunction with the foregoing embodiments, the implementation principle is similar. In this disclosure, some embodiments are described as implementations used together. Of course, those skilled in the art will understand that such illustrative examples are not intended to limit the embodiments of this disclosure.

[0310] Based on the same concept, embodiments of this disclosure also provide a TCI status determination apparatus or device.

[0311] It is understood that the TCI state determination apparatus and device provided in this disclosure include hardware structures and / or software modules corresponding to each function in order to achieve the above-mentioned functions. In conjunction with the units and algorithm steps of the various examples disclosed in this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of this disclosure.

[0312] Figure 11 This is a schematic diagram of a TCI state determination device according to an exemplary embodiment. (Refer to...) Figure 11 The device 200 includes: a receiving module 201, configured to receive first information, the first information being used to determine N sets of unified TCI states, where N is a positive integer; the receiving module 201 is further configured to receive second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme; and a processing module 202, configured to determine that the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is at least one set of unified TCI states among the N sets of unified TCI states.

[0313] This disclosure, when configuring a specified communication scheme, determines that at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0314] In some implementations, the DMRS corresponding to PDSCH and / or PDSCH is determined to be at least one of the N unified TCI states when at least one of the following conditions is met: the DMRS corresponding to PDSCH and / or PDSCH is scheduled by DCI format 1_0; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that PDSCH adopts at least one of the N unified TCI states; the DMRS corresponding to PDSCH and / or PDSCH is scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0315] This disclosure provides a variety of possible specified conditions to suit different configuration scenarios, determining at least one set of TCI states from multiple indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0316] In some embodiments, the receiving module 201 is further configured to: receive third information, the third information being used to configure a CMR; the processing module 202 is further configured to: when the CMR includes one NZP CSI-RS resource, determine one set of unified TCI states from among N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP CSI-RS resources, and it is determined that one of the multiple NZP CSI-RS resources should be selected, determine one set of unified TCI states from among N sets of unified TCI states, which is the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP CSI-RS resources, and it is determined that at least two of the multiple NZP CSI-RS resources should be selected, determine at least two sets of unified TCI states from among N sets of unified TCI states as the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH; when the CMR includes multiple NZP... When using CSI-RS resources and the network device configuration terminal does not select NZPCSI-RS resources, determine at least two sets of unified TCI states from N sets of unified TCI states as PDSCH and / or the TCI states corresponding to the DMRS corresponding to PDSCH.

[0317] This disclosure provides multiple methods for determining at least one set of TCI states from multiple sets under different configuration schemes, so as to communicate using at least one determined set of TCI states. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0318] In some implementations, the processing module 202 is further configured to: determine at least two unified TCI states from the N unified TCI states as the TCI states corresponding to PDSCH and / or the DMRS corresponding to PDSCH when the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, wherein the specified scheme adopts M-TRP communication; or, when the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, determine one unified TCI state from the N unified TCI states as the TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH.

[0319] This disclosure provides multiple methods for determining at least one set of TCI states from multiple sets under different configuration schemes, so as to communicate using at least one determined set of TCI states. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0320] In some implementations, the receiving module 201 is further configured to: receive third information, the third information being used to configure a CMR; in cases where the terminal does not support dynamic switching between a specified scheme and an S-TRP communication scheme, the terminal selects more than one NZP CSI-RS resource from multiple NZPCSI-RS resources, and the CMR includes multiple NZP CSI-RS resources, wherein the specified scheme uses M-TRP communication.

[0321] This disclosure allows the terminal to select multiple NZP CSI-RS under a specified scheme when the terminal does not support dynamic switching between a designated scheme and an S-TRP communication scheme. In this case, communication is performed using at least one defined set of TCI states. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0322] In some embodiments, the device 200 further includes a sending module 203 for sending fourth information, the fourth information being used to indicate whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0323] This disclosure can also report to the network device whether the terminal supports the ability to dynamically switch between a specified scheme and the S-TRP communication scheme, so that when the specified scheme is configured for communication, at least one of the indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0324] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0325] This disclosure determines that, in the case of communication via CJT, at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0326] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0327] This disclosure provides multiple possible scenarios for the specified scheme. This allows for determining at least one set of indicated TCI states to be used for communication when configuring the specified scheme for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0328] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0329] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0330] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0331] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0332] In some implementations, the second information is carried via RRC signaling; and / or, the second information is carried via a third MAC CE.

[0333] This disclosure provides one possible implementation of the second information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0334] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state and an uplink TCI state.

[0335] This disclosure provides multiple representations of a unified TCI state to determine at least one set of indicated TCI states for communication when a specified communication scheme is configured. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0336] In some implementations, the sending module 203 is further configured to: send fifth information, which indicates the NZP CSI-RS resource selected by the terminal.

[0337] This publicly disclosed terminal can also report selected NZP CSI-RS resources to the network device so that, when a specified communication scheme is configured, at least one of the indicated TCI states can be used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0338] Figure 12 This is a schematic diagram of another TCI state determination device according to an exemplary embodiment. (Refer to...) Figure 12 The device 300 includes: a sending module 301, used to send first information, the first information being used to determine N sets of unified TCI states, where N is a positive integer; the sending module 301 is also used to send second information, the second information being used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are configured to communicate using a specified scheme.

[0339] This disclosure, when configuring a specified communication scheme, determines that at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0340] In some implementations, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by DCI format 1_0; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that PDSCH and / or the DMRS corresponding to PDSCH adopt at least one unified TCI state from N unified TCI states; or, PDSCH and / or the DMRS corresponding to PDSCH are scheduled by a second DCI, wherein the second DCI includes a first indication field, the time interval between the second DCI and the DMRS corresponding to PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

[0341] This disclosure provides a variety of possible specified conditions to suit different configuration scenarios, determining at least one set of TCI states from multiple indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0342] In some embodiments, the sending module 301 is further configured to: send third information, the third information being used to configure a CMR; the CMR includes an NZP CSI-RS resource; the CMR includes multiple NZP CSI-RS resources, and the network device is not configured to allow the terminal to select NZP CSI-RS resources; the CMR includes multiple NZP CSI-RS resources, and the network device is configured to allow the terminal to select NZP CSI-RS resources.

[0343] This disclosure provides multiple methods for determining at least one set of TCI states from multiple sets under different configuration schemes, so as to communicate using at least one determined set of TCI states. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0344] In some embodiments, the device 300 further includes a receiving module 302 for receiving fourth information, the fourth information being used to indicate whether the terminal supports the ability to dynamically switch between a specified scheme and an S-TRP communication scheme.

[0345] This disclosed network device also has the ability to receive terminal reports regarding whether it supports dynamic switching between a specified scheme and the S-TRP communication scheme. This allows it to determine which TCI state from multiple indicated TCI states to use for communication when the specified scheme is configured for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0346] In some implementations, the scheme is designated as Coherent Joint Transmission (CJT).

[0347] This disclosure determines that, in the case of communication via CJT, at least one set of indicated TCI states is used for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0348] In some implementations, CJT includes at least one of the following: a CMR configured by the network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZP CSI-RS resource corresponds to one TRP or one TRP group; a spatial basis vector is independently fed back for each NZP CSI-RS resource; a frequency domain basis vector is independently fed back for each NZP CSI-RS resource; and the same frequency domain basis vector is fed back for each NZP CSI-RS resource.

[0349] This disclosure provides multiple possible scenarios for the specified scheme. This allows for determining at least one set of indicated TCI states to be used for communication when configuring the specified scheme for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0350] In some implementations, the first information is carried by a first MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

[0351] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0352] In some implementations, the first information is carried by a second MAC CE and a DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

[0353] This disclosure provides one possible implementation of the first information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0354] In some implementations, the second information is carried via RRC signaling; and / or, the second information is carried via a third MAC CE.

[0355] This disclosure provides one possible implementation of the second information to determine, when configuring a specified scheme for communication, at least one set of indicated TCI states for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0356] In some implementations, the unified TCI state includes at least one of the following: a combined TCI state; a downlink TCI state and an uplink TCI state.

[0357] This disclosure provides multiple representations of a unified TCI state to determine at least one set of indicated TCI states for communication when a specified communication scheme is configured. This improves the flexibility of data transmission based on a unified TCI state, thereby enhancing the performance of data transmission and / or reception.

[0358] In some embodiments, the receiving module 302 is further configured to: receive fifth information, the fifth information being used to indicate the NZP CSI-RS resource selected by the terminal.

[0359] The terminal network device disclosed herein can also receive selected NZP CSI-RS resources reported by the terminal, so as to determine at least one set of TCI states among the indicated multiple TCI states for communication when a specified scheme is configured for communication. This improves the flexibility of data transmission based on a unified TCI state, thereby improving the performance of data transmission and / or reception.

[0360] It should be understood that the aforementioned device 300 may also include any possible modules such as a processing module, which are not limited herein.

[0361] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0362] Figure 13This is a schematic diagram of a TCI state determination device according to an exemplary embodiment. For example, device 400 can be any terminal such as a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0363] Reference Figure 13 The device 400 may include one or more of the following components: processing component 402, memory 404, power component 406, multimedia component 408, audio component 410, input / output (I / O) interface 412, sensor component 414, and communication component 416.

[0364] Processing component 402 typically controls the overall operation of device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0365] Memory 404 is configured to store various types of data to support the operation of device 400. Examples of this data include instructions for any application or method operating on device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0366] The power supply component 406 provides power to the various components of the device 400. The power supply component 406 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 400.

[0367] Multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera and / or a rear-facing camera. When the device 400 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0368] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

[0369] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0370] Sensor assembly 414 includes one or more sensors for providing status assessments of various aspects of device 400. For example, sensor assembly 414 may detect the on / off state of device 400, the relative positioning of components such as the display and keypad of device 400, changes in the position of device 400 or a component of device 400, the presence or absence of user contact with device 400, the orientation or acceleration / deceleration of device 400, and temperature changes of device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0371] Communication component 416 is configured to facilitate wired or wireless communication between device 400 and other devices. Device 400 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0372] In an exemplary embodiment, device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0373] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by a processor 420 of device 400 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0374] Figure 14 This is a schematic diagram illustrating another TCI state determination device according to an exemplary embodiment. For example, device 500 may be provided as a base station or a server. (See also...) Figure 14 The device 500 includes a processing component 522, which further includes one or more processors, and memory resources represented by memory 532 for storing instructions executable by the processing component 522, such as application programs. The application programs stored in memory 532 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 522 is configured to execute instructions to perform the methods described above.

[0375] Device 500 may also include a power supply component 526 configured to perform power management of device 500, a wired or wireless network interface 550 configured to connect device 500 to a network, and an input / output (I / O) interface 558. Device 500 can operate on an operating system stored in memory 532, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0376] This invention proposes a method for determining the TCI status of PDSCH-CJT transmission when multiple TCI statuses are indicated in the context of unified TCI status indication for S-DCI multi-TRP. This method addresses situations where no explicit signaling indicates which TCI status(s) corresponds to which PDSCH-CJT transmission. This improves the transmission flexibility of PDSCH based on unified TCI status and enhances PDSCH-CJT transmission performance.

[0377] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0378] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0379] It is further understood that the meaning of words such as “responding to” and “if” used in this disclosure depends on the context and the actual usage scenario. For example, the word “responding to” as used herein can be interpreted as “when” or “if” or “if”.

[0380] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0381] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0382] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A method for determining the Transmission Configuration Indicator (TCI) status, characterized in that, The method is executed by a terminal and includes: Receive first information, which is used to determine N sets of unified TCI states, where N is a positive integer; Receive second information, which is used to determine that the Physical Downlink Shared Channel (PDSCH) and / or the Demodulation Reference Signal (DMRS) corresponding to the PDSCH are configured to communicate using a specified scheme; Determine that the PDSCH and / or the DMRS corresponding to the PDSCH are at least one set of unified TCI states among the N sets of unified TCI states; The step of determining that the PDSCH and / or the DMRS corresponding to the PDSCH corresponds to at least one set of unified TCI states from the N sets of unified TCI states includes: If the terminal does not support dynamic switching between the specified scheme and the single transmit / receive point (S-TRP) communication scheme, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme uses M-TRP communication; or, When the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, one set of unified TCI states among the N sets of unified TCI states is determined as the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme adopts M-TRP communication.

2. The method according to claim 1, characterized in that, Under at least one of the following conditions, the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is determined to be at least one of the N unified TCI states: The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by downlink control information DCI format 1_0; The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by the first DCI, wherein the first DCI does not include the first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that the PDSCH and / or the DMRS corresponding to the PDSCH adopt at least one set of unified TCI states among the N sets of unified TCI states. The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a second DCI, wherein the second DCI includes the first indication field, the time interval between the second DCI and the PDSCH and / or the DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

3. The method according to claim 1 or 2, characterized in that, The method further includes: Receive third information, which is used to configure a Channel Measurement Resource (CMR); The step of determining that the PDSCH and / or the DMRS corresponding to the PDSCH corresponds to at least one set of unified TCI states from the N sets of unified TCI states includes: When the CMR includes a non-zero power channel state information reference signal NZP CSI-RS resource, determine one set of unified TCI states among the N sets of unified TCI states, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH; When the CMR includes multiple NZP CSI-RS resources, and it is determined that one of the multiple NZP CSI-RS resources is an N-set unified TCI state, which is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH. When the CMR includes multiple NZP CSI-RS resources, and it is determined that at least two NZPCSI-RS resources among the multiple NZP CSI-RS resources should be selected, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH. When the CMR includes multiple NZP CSI-RS resources, and the network device is configured so that the terminal does not select NZP CSI-RS resources, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH.

4. The method according to claim 1, characterized in that, The method further includes: Receive third information, which is used to configure a CMR; If the terminal does not support dynamic switching between the specified scheme and the S-TRP communication scheme, and the terminal selects more than one NZP CSI-RS resource from multiple NZP CSI-RS resources, then the CMR includes the multiple NZP CSI-RS resources.

5. The method according to claim 1 or 4, characterized in that, The method further includes: Send a fourth message, which indicates whether the terminal supports the ability to dynamically switch between the specified scheme and the S-TRP communication scheme.

6. The method according to any one of claims 1-5, characterized in that, The specified scheme is Coherent Joint Transmission (CJT).

7. The method according to claim 6, characterized in that, The CJT includes at least one of the following: A CMR configured in a network device includes L NZP CSI-RS resources, where L is a positive integer, and one NZPCSI-RS resource corresponds to one TRP or one TRP group; Independently feedback spatial basis vectors for each NZP CSI-RS resource; Independent feedback frequency domain basis vectors for each NZP CSI-RS resource; The same frequency domain basis vector is fed back for each NZP CSI-RS resource.

8. The method according to any one of claims 1-7, characterized in that, The first information is carried by the first media access control unit MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

9. The method according to any one of claims 1-7, characterized in that, The first information is carried by the second MAC CE and DCI. The second MAC CE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

10. The method according to any one of claims 1-9, characterized in that, The second information is carried by Radio Resource Control (RRC) signaling; and / or, The second information is carried by a third MAC CE.

11. The method according to any one of claims 1-10, characterized in that, The unified TCI status includes at least one of the following: Joint TCI status; At least one of the downlink TCI state and the uplink TCI state.

12. The method according to any one of claims 1-11, characterized in that, The method further includes: Send a fifth message, which indicates the NZP CSI-RS resource selected by the terminal.

13. A method for determining the Transmission Configuration Indicator (TCI) status, characterized in that, The method is executed by a network device and includes: Send a first message, which is used to determine N sets of unified TCI states, where N is a positive integer; Send a second message, the second message being used to determine that the Physical Downlink Shared Channel (PDSCH) and / or the Demodulation Reference Signal (DMRS) corresponding to the PDSCH are configured to communicate using a specified scheme, wherein the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is determined by the terminal, and the corresponding TCI state is at least one set of unified TCI states among the N sets of unified TCI states; Where the terminal does not support dynamic switching between the specified scheme and the single transmit / receive point (S-TRP) communication scheme, at least two of the N unified TCI states are the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, and the specified scheme uses M-TRP communication; or, When the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, one set of unified TCI states among the N sets of unified TCI states is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme adopts M-TRP communication.

14. The method according to claim 13, characterized in that, The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by downlink control information DCI format 1_0; or, The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a first DCI, wherein the first DCI does not include a first indication field, the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2, and the first indication field is used to indicate that the PDSCH and / or the DMRS corresponding to the PDSCH adopt at least one of the N sets of unified TCI states; or, The PDSCH and / or the DMRS corresponding to the PDSCH are scheduled by a second DCI, wherein the second DCI includes the first indication field, the time interval between the second DCI and the PDSCH and / or the DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_1 or DCI format 1_2.

15. The method according to claim 13 or 14, characterized in that, The method further includes: Send a third message, which is used to configure a Channel Measurement Resource (CMR); The CMR includes a non-zero power channel state information reference signal (NZP CSI-RS) resource. The CMR includes multiple NZP CSI-RS resources, and the network device is not configured to allow terminals to select NZP CSI-RS resources; The CMR includes multiple NZP CSI-RS resources, and the network device is configured so that the terminal does not select NZP CSI-RS resources.

16. The method according to any one of claims 13-15, characterized in that, The method further includes: Receive fourth information, which indicates whether the terminal supports the ability to dynamically switch between a specified scheme and a single transmit / receive point (S-TRP) communication scheme.

17. The method according to claim 16, characterized in that, The specified scheme is Coherent Joint Transmission (CJT).

18. The method according to claim 17, characterized in that, The CJT includes at least one of the following: The network device is configured with a CMR including L NZP CSI-RS resources, where L is a positive integer, and one NZPCSI-RS resource corresponds to one TRP or one TRP group; Independently feedback spatial basis vectors for each NZP CSI-RS resource; Independent feedback frequency domain basis vectors for each NZP CSI-RS resource; The same frequency domain basis vector is fed back for each NZP CSI-RS resource.

19. The method according to any one of claims 13-18, characterized in that, The first information is carried by the first media access control unit MAC CE, and the N sets of unified TCI states indicated by the first MAC CE correspond to a code point in the TCI state indication field carried in the DCI.

20. The method according to any one of claims 13-18, characterized in that, The first information is carried by the second MACCE and DCI. The second MACCE is used to indicate the N sets of unified TCI states corresponding to each of the multiple code points in the TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

21. The method according to any one of claims 13-20, characterized in that, The second information is carried by Radio Resource Control (RRC) signaling; and / or, The second information is carried by a third MAC CE.

22. The method according to any one of claims 13-21, characterized in that, The unified TCI status includes at least one of the following: Joint TCI status; At least one of the downlink TCI state and the uplink TCI state.

23. The method according to any one of claims 13-22, characterized in that, The method further includes: Receive fifth information, which is used to indicate the NZP CSI-RS resource selected by the terminal.

24. A Transmission Configuration Indication (TCI) status determination device, characterized in that, The device includes: The receiving module is used to receive first information, which is used to determine N sets of unified TCI states, where N is a positive integer; The receiving module is further configured to receive second information, the second information being used to determine that the Physical Downlink Shared Channel (PDSCH) and / or the Demodulation Reference Signal (DMRS) corresponding to the PDSCH are configured to communicate using a specified scheme. The processing module is used to determine that the PDSCH and / or the DMRS corresponding to the PDSCH are at least one set of unified TCI states among the N sets of unified TCI states; The processing module determines the PDSCH and / or the DMRS corresponding to the PDSCH in the following manner, wherein the corresponding TCI state is at least one of the N unified TCI states: If the terminal does not support dynamic switching between the specified scheme and the single transmit / receive point (S-TRP) communication scheme, at least two sets of unified TCI states among the N sets of unified TCI states are determined to be the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme adopts M-TRP communication; or, When the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, one set of unified TCI states among the N sets of unified TCI states is determined as the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme adopts M-TRP communication.

25. A Transmission Configuration Indication (TCI) status determination device, characterized in that, The device includes: The sending module is used to send first information, which is used to determine N sets of unified TCI states, where N is a positive integer; The sending module is further configured to send second information, the second information being used to determine that the Physical Downlink Shared Channel (PDSCH) and / or the Demodulation Reference Signal (DMRS) corresponding to the PDSCH are configured to communicate using a specified scheme, wherein the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is determined by the terminal, and the corresponding TCI state is at least one set of unified TCI states among the N sets of unified TCI states; Where the terminal does not support dynamic switching between the specified scheme and the single transmit / receive point (S-TRP) communication scheme, at least two of the N unified TCI states are the TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, and the specified scheme uses M-TRP communication; or, When the terminal supports dynamic switching between the specified scheme and the S-TRP communication scheme, one set of unified TCI states among the N sets of unified TCI states is the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, wherein the specified scheme adopts M-TRP communication.

26. A Transmission Configuration Indicator (TCI) status determination device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to perform the method described in any one of claims 1 to 12.

27. A Transmission Configuration Indicator (TCI) status determination device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to perform the method according to any one of claims 13 to 23.

28. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to perform the method according to any one of claims 1 to 12.

29. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the network device, the network device is able to perform the method of any one of claims 13 to 23.

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