Downlink communication methods, apparatus, devices, and storage media

Abstract

This disclosure relates to a downlink communication method, apparatus, device, and storage medium. The downlink communication method includes the steps of: receiving first information used to configure a channel measurement resource (CMR); the CMR comprising N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1; determining a unified transmit configuration indication (TCI) state corresponding to the physical downlink shared channel (PDSCH) and / or the demodulation reference signal (DMRS) corresponding to the PDSCH as a unified TCI state of M sets; and receiving the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of M sets. This disclosure improves downlink communication performance by configuring the number of NZP CSI-RS resources included in a single channel measurement resource to be multiple, and by deciding to use multiple sets of unified TCI states to receive a downlink channel or reference signal.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and particularly to a downlink communication method, apparatus, device, and storage medium.

Background Art

[0002] Currently, in some solutions, a solution based on coherent joint transmission (CJT) of the physical downlink shared channel (PDSCH) is under consideration. For the same terminal, it is possible to support up to four transmission and reception points (TRPs) to provide services simultaneously.

Summary of the Invention

Problems to be Solved by the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a downlink communication method, apparatus, device, and storage medium.

Means for Solving the Problems

[0004] According to a first aspect of an embodiment of the present disclosure, a downlink communication method is provided, including receiving first information used to configure one channel measurement resource (CMR), where the CMR includes N non-zero power channel state information reference signal (NZP CSI-RS) resources, and N is a positive integer greater than 1; determining a unified transmission configuration indication (TCI) state corresponding to the physical downlink shared channel (PDSCH) and / or the demodulation reference signal (DMRS) corresponding to the PDSCH as M sets of unified TCI states, where M is a positive integer greater than 1 and M is less than or equal to N; and receiving the PDSCH and / or the DMRS corresponding to the PDSCH using the M sets of unified TCI states.

[0005] A second aspect of the embodiments of the present disclosure provides a downlink communication method comprising: transmitting first information used to constitute a single channel measurement resource (CMR), wherein the CMR comprises N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1; and transmitting a physical downlink shared channel (PDSCH) and / or a corresponding demodulation reference signal (DMRS) using M sets of Unified Transmit Configuration Instruction (TCI) states, where M is a positive integer greater than 1, and M is less than or equal to N.

[0006] According to a third aspect of the embodiments of the present disclosure, a downlink communication device is provided, comprising a receiving module and a processing module, the receiving module configured to receive first information used to constitute a single channel measurement resource (CMR), the CMR comprising N non-zero power channel state information reference signal (NZP CSI-RS) resources, wherein N is a positive integer greater than 1; the processing module configured to determine a unified transmit configuration instruction (TCI) state corresponding to a physical downlink shared channel (PDSCH) and / or a demodulation reference signal (DMRS) corresponding to the PDSCH as a unified TCI state of M set, wherein M is a positive integer greater than 1 and M is less than or equal to N; and the receiving module is also configured to receive the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of M set.

[0007] According to a fourth embodiment of the embodiments of the present disclosure, a downlink communication device is provided, comprising a transmitting module configured to transmit first information used to constitute a single channel measurement resource (CMR), wherein the CMR comprises N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1, and the transmitting module is also configured to transmit a physical downlink shared channel (PDSCH) and / or a demodulation reference signal (DMRS) corresponding to the PDSCH using M sets of Unified Transmit Configuration Instruction (TCI) states, where M is a positive integer greater than 1 and M is less than or equal to N.

[0008] According to a fifth embodiment of the embodiments of the present disclosure, a downlink communication device is provided, comprising a processor and a memory for storing instructions that can be executed by the processor, wherein the processor is configured to perform the first embodiment and any method of the first embodiment.

[0009] According to a sixth embodiment of the embodiments of the present disclosure, a downlink communication device is provided, comprising a processor and a memory for storing instructions that can be executed by the processor, wherein the processor is configured to perform the second embodiment and any method of the second embodiment.

[0010] According to a seventh aspect of the embodiments of the present disclosure, a non-temporary computer-readable storage medium is provided, and once instructions in the storage medium are executed by the terminal's processor, the terminal is able to perform either the first aspect or the first aspect.

[0011] According to an eighth aspect of the embodiments of the present disclosure, a non-temporary computer-readable storage medium is provided, and when instructions in the storage medium are executed by the processor of the network device, the network device is able to perform either the second aspect or the method of the second aspect.

[0012] The technical solutions provided by embodiments of this disclosure may include the following beneficial effects: improving downlink communication performance by setting the number of non-zero power channel state information reference signal resources included in a single channel measurement resource to multiple, and deciding to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0013] Please understand that the general statements above and the detailed statements below are for illustrative and illustrative purposes only and do not limit this disclosure. [Brief explanation of the drawing]

[0014] The accompanying drawings incorporated herein and constituting part thereof illustrate embodiments consistent with this disclosure and, together with this specification, are helpful in illustrating the principles of this disclosure. [Figure 1] This is a schematic diagram of a wireless communication system according to one exemplary embodiment. [Figure 2] This is a flowchart of a downlink communication method according to one exemplary embodiment. [Figure 3] This is a flowchart of another downlink communication method according to one exemplary embodiment. [Figure 4] This is a flowchart of yet another downlink communication method, based on one exemplary embodiment. [Figure 5] This is a flowchart of yet another downlink communication method, based on one exemplary embodiment. [Figure 6] This is a flowchart of another downlink communication method according to one exemplary embodiment. [Figure 7] This is a flowchart of yet another downlink communication method, based on one exemplary embodiment. [Figure 8] This is a flowchart of yet another downlink communication method, based on one exemplary embodiment. [Figure 9] This is a schematic diagram of a downlink communication device according to one exemplary embodiment. [Figure 10]It is a schematic diagram of another downlink communication device according to an exemplary embodiment. [Figure 11] It is a schematic diagram of a downlink communication device according to an exemplary embodiment. [Figure 12] It is a schematic diagram of another downlink communication device according to an exemplary embodiment.

Mode for Carrying Out the Invention

[0015] Hereinafter, exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When referring to the drawings in the following description, the same numbers in different drawings indicate the same or similar elements unless otherwise specified. The embodiments described in the following exemplary embodiments do not represent all embodiments that conform to the present disclosure.

[0016] Hereinafter, exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When referring to the drawings in the following description, the same numbers in different drawings indicate the same or similar elements unless otherwise specified. The embodiments described in the following exemplary embodiments do not represent all embodiments that conform to the present disclosure.

[0017] The communication method according to the present disclosure can be applied to the wireless communication system 100 shown in FIG. 1. The network system can include a network device 110 and a terminal 120. The wireless communication system shown in FIG. 1 is merely an example, and it is understood that the wireless communication system can further include other network devices such as a core network device, a wireless relay device, and a wireless backhaul device that are not shown in FIG. 1. The embodiments of the present disclosure do not limit the number of network devices and terminals included in the wireless communication system.

[0018] Furthermore, it can be understood that the wireless communication system of the embodiments of this disclosure is a network that provides wireless communication functionality. The wireless communication system may employ various 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), or carrier sense multiple access with collision avoidance. Based on factors such as the capacity, speed, and latency of different networks, networks can be classified into future-evolving networks such as 2G networks, 3G networks, 4G networks, or the 5th generation wireless communication system (5G) networks, and 5G networks are also called NR (New Radio) networks. For the sake of clarity, in this disclosure, wireless communication networks may sometimes be referred to simply as networks.

[0019] Furthermore, the network device 110 included in the present disclosure may also include a wireless access network device. The wireless access network device may be a base station, an evolved Node B (eNB), a home base station, an access point (AP) in a WIFI (Wireless Fidelity) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a TRP, etc., and may be a gNB in an NR system, a component constituting a base station, a part of a device, etc. In the case of a V2X (Vehicle-to-Everything) communication system, the access network device may be an in-vehicle device. It should be understood that the specific technology and specific device form adopted by the access network device are not limited in the embodiments of the present disclosure.

[0020] Also, the terminal 120 according to the present disclosure is also referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., and is a device that provides a voice and / or data connection to a user. For example, the terminal may be a handheld device with a wireless connection function, an in-vehicle device, etc. Currently, examples of terminals include mobile phones, pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptop computers, tablet computers, wearable devices, or in-vehicle devices, etc. Also, in the case of a V2X communication system, the terminal device may be an in-vehicle device. Note that the specific technology and specific device form adopted by the terminal are not limited in the embodiments of the present disclosure.

[0021] In the embodiments of this disclosure, the network device 110 and the terminal 120 may employ any feasible wireless communication technology to enable data transmission between them. The transmission channel through which the network device 110 transmits data to the terminal 120 is called the downlink (DL), and the transmission channel through which the terminal 120 transmits data to the network device 110 is called the uplink (UL). It can be understood that the network device in the embodiments of this disclosure may be a base station. Of course, the network device may be any other feasible network device, and the terminal may be any feasible terminal, and this disclosure is not limited thereto.

[0022] In related solutions, a CJT-based approach for PDSCH is discussed, which can support up to four TRPs simultaneously providing services to the same terminal.

[0023] In some embodiments, a TRP may be replaced by a TRP group. That is, a TRP group may include one or more TRPs. For ease of explanation, each embodiment of this disclosure will be described using a TRP as an example, but it should be understood that the same applies to TRP groups. This disclosure is not limited thereto.

[0024] The specific number of TRPs used to transmit the PDSCH and / or the corresponding demodulation reference signal (DMRS) to the terminal can be determined by the network device or the terminal itself.

[0025] In some embodiments, a network device can configure a single channel measurement resource (CMR) for a terminal. Assuming that a single CMR contains only one non-zero power (NZP) channel state information reference signal (CSI-RS) resource, this means that the network device configures a single TRP on the terminal for sending the PDSCH and / or the corresponding DMRS to the terminal. Since one NZP CSI-RS resource corresponds to one TRP, one NZP CSI-RS resource can also be understood as one TRP. In this case, the terminal does not need to select an NZP CSI-RS resource. The terminal can directly provide channel state information (CSI) feedback for the single NZP CSI-RS resource contained in the CMR. For example, the terminal can provide feedback such as selection instructions for space domain (SD) basis vectors, selection instructions for frequency domain (FD) basis vectors, non-zero coefficient reports, and rank reports.

[0026] In some embodiments, a network device can configure one CMR for a terminal. Assume that one CMR contains multiple NZP CSI-RS resources (e.g., N NZP CSI-RS resources, where N is a positive integer greater than 1). The network device then instructs the terminal that it does not need to make any further selections from the N NZP CSI-RS resources; that is, the network device instructs the terminal that it does not need to select any NZP CSI-RS resources from the N NZP CSI-RS resources. The terminal can directly perform CSI feedback for the N NZP CSI-RS resources configured by the network device, and the network device uses N TRPs corresponding to those N NZP CSI-RS resources to send PDSCH and / or DMRS corresponding to the PDSCH to the terminal.

[0027] In some embodiments, a network device may configure a single CMR for a terminal. Suppose a single CMR contains multiple NZP CSI-RS resources, for example, N NZP CSI-RS resources. The network device does not indicate that the terminal does not need to make further selections from the N NZP CSI-RS resources. The terminal may then select Q NZP CSI-RS resources from the N, where Q is less than or equal to N. After selecting Q NZP CSI-RS resources, the terminal may notify the network device which Q NZP CSI-RS resources were selected. For example, N bits may be used. That is, each NZP CSI-RS resource may be indicated by a single bit. A bit value of 1 may indicate that it was selected, and a bit value of 0 may indicate that it was not selected. Of course, in other cases, a bit value of 0 may indicate that it was selected, and a bit value of 1 may indicate that it was not selected. The specific meaning of each bit value is not limited to this disclosure and may be adaptively adjusted depending on the actual situation. The terminal can also simultaneously report CSI obtained from channel measurements of Q selected NZP CSI-RS resources.

[0028] In some cases, a terminal may decide to use multiple sets of unified transmission configuration indication (TCI) states to receive PDSCH and / or DMRS corresponding to PDSCH, in accordance with the network device settings or default rules. The unified TCI states may also be called indication TCI states.

[0029] However, in a scenario where a single CMR configured by a network device contains multiple NZP CSI-RS resources, the terminal selects only one of the multiple NZP CSI-RS resources, but the unified TCI state of multiple sets may be determined by the radio resource control (RRC) configuration or default rules. In this case, the network device cannot transmit the PDSCH and / or the corresponding DMRS, and the terminal cannot receive the PDSCH and / or the corresponding DMRS.

[0030] Accordingly, this disclosure provides a downlink communication method that improves downlink communication performance by configuring the number of NZP CSI-RS resources included in the CMR to be multiple and deciding to use multiple sets of unified TCI states for receiving downlink channels or reference signals.

[0031] In the following embodiments of this disclosure, only TRP will be described in detail as an example. Of course, in other embodiments, TRP may be replaced by a group of TRPs, and this disclosure is not limited thereto.

[0032] Figure 2 is a flowchart of a downlink communication method according to one exemplary embodiment. As shown in Figure 2, the method may be performed by a terminal and may include the following steps.

[0033] In step S11, the first piece of information is received.

[0034] In some embodiments, a terminal can receive first information, which is used to construct a CMR, which contains N NZP CSI-RS resources, where N is a positive integer greater than 1.

[0035] In some embodiments, the first information may be referred to as instruction information, first instruction information, configuration information, resource configuration information, etc., and this disclosure does not limit the names of the first information.

[0036] In some embodiments, a terminal can receive first information transmitted by a network device. This first information constitutes N NZP CSI-RS resources contained in a single CMR. Based on this first information, the terminal determines the N NZP CSI-RS resources contained in a single CMR configured by the network device.

[0037] In some embodiments, the terminal is configured with the PDSCHCJT scheme. The CJT scheme may involve a single CMR configured by the network device containing N NZP CSI-RS resources, where N is a positive integer greater than 1, and each NZP CSI-RS resource corresponds to one TRP or one TRP group.

[0038] If N is greater than 1, it can be understood that one CMR contains multiple NZP CSI-RS resources. In other words, one CMR corresponds to multiple TRPs or multiple TRP groups. In this case, CJT uses M-TRP communication.

[0039] Of course, in some other embodiments, the CJT scheme may include at least one of several CMRs configured by network devices containing N NZP CSI-RS resources.

[0040] For example, N can typically be 1, 2, 3, or 4. That is, one CMR usually contains 1 to 4 NZP CSI-RS resources.

[0041] For example, if N is greater than 1, the network device sets a corresponding limit. For instance, the network device sets an instruction indicating that the terminal does not need to make a selection. Then the terminal does not need to select one or more NZP CSI-RS resources from N NZP CSI-RS resources. The network device sends PDSCH and / or DMRS corresponding to PDSCH to the terminal using TRPs corresponding to those N NZP CSI-RS resources. The terminal also only needs to perform CSI feedback for those N NZP CSI-RS resources.

[0042] As another example, if N is greater than 1, the network device does not configure a limit. Then, the terminal can select one or more NZP CSI-RS resources from N NZP CSI-RS resources. For example, the terminal selects Q NZP CSI-RS resources from N NZP CSI-RS resources. It is understood that Q is a positive integer and Q is less than or equal to N. The terminal can notify the network device of the NZP CSI-RS resources selected by the terminal by sending information indicating the Q NZP CSI-RS resources selected by the terminal. The network device can send PDSCH and / or DMRS corresponding to the PDSCH to the terminal based on the TRPs corresponding to those Q NZP CSI-RS resources. The terminal also only needs to perform CSI feedback for the Q NZP CSI-RS resources.

[0043] It is understood that if a single CMR configured by network devices contains N NZP CSI-RS resources, the terminal can be considered to be using the CJT scheme.

[0044] In some embodiments, the CJT scheme may include independently feeding back spatial domain basis vectors for each NZP CSI-RS resource.

[0045] For example, the terminal independently feeds back spatial basis vectors 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, where 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.

[0046] If a terminal independently feeds back spatial domain basis vectors for each NZP CSI-RS resource, it can be considered that the terminal is using the CJT method.

[0047] In some embodiments, the CJT scheme may include independently feeding back frequency-domain basis vectors for each NZP CSI-RS resource.

[0048] For example, the terminal independently feeds back frequency domain basis vectors 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, where 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.

[0049] If a terminal independently feeds back frequency domain basis vectors for each NZP CSI-RS resource, it can be considered that the terminal employs the CJT method.

[0050] In some embodiments, the CJT scheme may include feeding back the same frequency-domain basis vector for each NZP CSI-RS resource.

[0051] For example, the terminal feeds back 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.

[0052] If a terminal feeds back the same frequency-domain basis vector for each NZP CSI-RS resource, it can be considered that the terminal is employing the CJT method.

[0053] In some embodiments, the CJT scheme may involve configuring multiple TRPs or multiple TRP groups by a network device. It is understood that each TRP or each TRP group corresponds to one NZP CSI-RS resource.

[0054] It is understood that when a network device constitutes multiple TRPs or multiple TRP groups, the terminal can be considered to be employing the CJT method.

[0055] In step S12, the unified TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH is determined as the unified TCI state of the M set.

[0056] In some embodiments, the terminal can determine a unified TCI state for the M set corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, where M is a positive integer greater than 1 and M is less than or equal to N.

[0057] For example, a terminal can determine the unified TCI state of an M set. This unified TCI state of the M set can be used by the terminal to receive PDSCHs and / or DMRSs corresponding to PDSCHs transmitted by some of the N TRPs corresponding to N NZP CSI-RS resources or by the TRPs.

[0058] For example, there are N TRPs corresponding to N NZP CSI-RS resources. A network device can use some or all of the N TRPs to send PDSCHs and / or DMRS corresponding to PDSCHs to a terminal. The terminal can determine a unified TCI state for M sets. This unified TCI state for M sets can be used by the terminal to receive PDSCHs and / or DMRS corresponding to PDSCHs sent from different TRPs, respectively.

[0059] In some embodiments, the unified TCI state of M sets is two unified TCI states.

[0060] In step S13, the PDSCH and / or the DMRS corresponding to the PDSCH are received using the unified TCI state of the M set.

[0061] In some embodiments, the terminal can receive the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of the M set determined in step S12.

[0062] For example, a terminal uses a determined set of unified TCI states to receive PDSCHs and / or DMRS corresponding to PDSCHs transmitted from different TRPs. In other words, a terminal uses one set of unified TCI states from the set of unified TCI states to receive PDSCHs and / or DMRS corresponding to PDSCHs transmitted from a given TRP. The unified TCI states that a terminal uses to receive PDSCHs and / or DMRS corresponding to PDSCHs transmitted from different TRPs may be the same or different.

[0063] It is understood that this disclosure can avoid a situation where multiple sets of unified TCI states are determined even though only one NZP CSI-RS resource is configured in one CMR, by configuring one CMR to include multiple NZP CSI-RS resources and configuring a terminal to receive PDSCH and / or DMRS corresponding to PDSCH transmitted by different TRPs using multiple sets of unified TCI states.

[0064] This disclosure describes how downlink communication performance can be improved by configuring a single CMR to include multiple NZP CSI-RS resources and deciding to use multiple sets of unified TCI states to receive downlink channels or reference signals.

[0065] In the downlink communication method provided by the embodiments of this disclosure, Figure 3 is a flowchart of another downlink communication method according to an exemplary embodiment. As shown in Figure 3, this method further includes the following steps.

[0066] In step S21, the second piece of information is received.

[0067] In some embodiments, the terminal may receive a second piece of information, which is used to determine the unified TCI state of K sets. The unified TCI state of M sets may be a subset of the unified TCI state of K sets, where K is a positive integer greater than 1.

[0068] For example, a terminal receives second information transmitted by a network device. This second information indicates the unified TCI state of K sets. Based on this second information, the terminal determines the unified TCI state of K sets set by the network device.

[0069] For example, the terminal directly determines the unified TCI state of set M based on the second piece of information, meaning that the unified TCI state of set K determined through the second piece of information is equal to the unified TCI state of set M. In other words, K may be equal to M.

[0070] For example, the unified TCI state of set M is a true subset of the unified TCI state of set K, meaning the terminal determines the unified TCI state of set K based on the second piece of information. The unified TCI state of set K is greater than the unified TCI state of set M. The terminal then determines the unified TCI state of set M from the unified TCI state of set K. In other words, K is greater than M.

[0071] In some embodiments, the K-set unified TCI states determined through the second piece of information are two sets of unified TCI states, i.e., K is equal to 2.

[0072] In this disclosure, the network device improves downlink communication performance when a single CMR is configured to include multiple NZP CSI-RS resources by instructing it to use multiple sets of unified TCI states to receive downlink channels or reference signals.

[0073] In the downlink communication method provided in the embodiments of this disclosure, the second information is used to indicate the unified TCI state of K sets.

[0074] In some embodiments, the second piece of information may indicate the unified TCI state of the K set.

[0075] For example, one second piece of information may directly indicate the unified TCI state of K sets. The terminal may directly determine the unified TCI state of K sets based on the received second piece of information.

[0076] For example, the terminal may determine the unified TCI state of K sets indicated by the second piece of information it last received, based on the second piece of information it last received.

[0077] For example, assuming that the K-set unified TCI state indicated by the second piece of information is two sets of unified TCI states, the terminal may determine the two sets of unified TCI states indicated by the second piece of information that it last received, based on the second piece of information that it last received.

[0078] This disclosure allows for the direct indication of the unified TCI state of multiple sets via second information. Therefore, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0079] In the downlink communication method provided in the embodiments of this disclosure, Figure 4 is a flowchart of yet another downlink communication method according to an exemplary embodiment. As shown in Figure 4, receiving second information may further include the following steps.

[0080] In step S31, L pieces of second information are received.

[0081] In some embodiments, a terminal can receive multiple pieces of second information, for example, L pieces of second information, where L is a positive integer greater than 1, and the first L-1 pieces of second information are used to indicate one or more sets of unified TCI states, and the L-th piece of second information is used to indicate one set of unified TCI states.

[0082] For example, a terminal receives L pieces of second information. The Lth piece of second information is used to indicate one set of unified TCI states. The first L-1 pieces of second information can each indicate one or more sets of unified TCI states.

[0083] For example, L pieces of second information are three pieces of second information: second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, i.e., unified TCI state 1; second information 2 can indicate one set of unified TCI states, i.e., unified TCI state 2; and second information 3 can indicate one set of unified TCI states, i.e., new unified TCI state 2. Alternatively, second information 1 can indicate one set of unified TCI states, i.e., unified TCI state 1; second information 2 can indicate two sets of unified TCI states, i.e., unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, i.e., new unified TCI state 2. As a further example, second information 1 can refer to two sets of unified TCI states, namely unified TCI state 1 and unified TCI state 2; second information 2 can refer to two sets of unified TCI states, namely unified TCI state 3 and unified TCI state 4; and second information 3 can refer to one set of unified TCI states, namely the new unified TCI state 2.

[0084] In some embodiments, this method further includes the following steps:

[0085] In step S32, the unified TCI state of one or more sets indicated by the first L-1 sets of second information is updated using the unified TCI state indicated by the L-th second information, and the unified TCI state of K sets is obtained.

[0086] In some embodiments, the terminal can use the unified TCI state indicated by the L-1 second pieces of information to update one or more sets of unified TCI states indicated by the first L-1 second pieces of information, thereby obtaining K sets of unified TCI states.

[0087] For example, the L pieces of second information may be three pieces of second information: second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, i.e., unified TCI state 1; second information 2 can indicate one set of unified TCI states, i.e., unified TCI state 2; and second information 3 can indicate one set of unified TCI states, i.e., new unified TCI state 2. In this case, the terminal can determine that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1 and unified TCI state 2. The terminal uses the new unified TCI state 2 indicated by second information 3 to update the unified TCI state 2 determined by the first two pieces of second information, and obtains the updated K sets of unified TCI states, i.e., unified TCI state 1 and new unified TCI state 2.

[0088] For example, L pieces of second information may be three pieces of second information, namely second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate two sets of unified TCI states, namely unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, namely new unified TCI state 2. In this case, the terminal can determine that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1, unified TCI state 2, and unified TCI state 3. The terminal uses the new unified TCI state 2 indicated by second information 3 to update the unified TCI state 2 determined through the first two pieces of second information, and obtains the updated K sets of unified TCI states, namely unified TCI state 1, new unified TCI state 2, and unified TCI state 3.

[0089] As another example, the L pieces of second information may be three pieces of second information, namely second information 1, second information 2, and second information 2. Here, second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate two sets of unified TCI states, namely unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, namely unified TCI state 4. In this case, the terminal can determine that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1, unified TCI state 2, and unified TCI state 3. The terminal uses unified TCI state 4 indicated by second information 3 to update the unified TCI states determined by the first two pieces of second information and obtains the updated K sets of unified TCI states, namely unified TCI state 1, unified TCI state 2, unified TCI state 3, and unified TCI state 4.

[0090] In the example above, if the Lth second piece of information indicates only one set of unified TCI states, the terminal will use the unified TCI state indicated by the Lth second piece of information to update the unified TCI state corresponding to the unified TCI state indicated by the Lth second piece of information from the one or more sets of unified TCI states determined by the first L-1 pieces of information, while the remaining unified TCI states will remain unchanged.

[0091] This disclosure allows for the indication of a unified TCI state for multiple sets through multiple pieces of second information, thereby improving downlink communication performance when the number of NZP CSI-RS resources included in a single CMR is set to multiple, by using the unified TCI state of those multiple sets to receive downlink channels or reference signals.

[0092] In the downlink communication method provided in the embodiments of this disclosure, the second information is carried by a first medium access control element (MAC CE), and at least one set of unified TCI states indicated by the first MAC CE corresponds to a code point in a TCI state indicator field carried by downlink control information (DCI).

[0093] In some embodiments, the second information is carried by a first MAC CE, which may indicate at least one set of unified TCI states, where the at least one set of unified TCI states indicated by the MAC CE may correspond to a single code point in the TCI state indication field carried by the DCI.

[0094] This disclosure provides a possible implementation of the second information, which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, allows for the reception of downlink channels or reference signals using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0095] In the downlink communication method provided in embodiments of the present disclosure, the second information is carried by a second MAC CE and DCI, the second MAC CE is used to indicate at least one set of unified TCI states corresponding to each of the multiple code points corresponding to the TCI state indicator field carried by the DCI, and the TCI state indicator field carried by the DCI is used to indicate one of the multiple code points.

[0096] In some embodiments, the second information is carried by a second MAC CE and DCI. The second MAC CE can indicate at least one set of unified TCI states corresponding to each code point within a plurality of code points. The plurality of code points may be a plurality of code points that may exist in the TCI state indication field carried by the DCI. The TCI state indication field carried by the DCI can indicate one of the plurality of code points, thereby indicating at least one set of unified TCI states corresponding to that code point.

[0097] This disclosure provides a possible implementation of the second information, which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, allows for the reception of downlink channels or reference signals using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0098] In the downlink communication method provided in the embodiments of this disclosure, Figure 5 is a flowchart of yet another downlink communication method according to an exemplary embodiment. As shown in Figure 5, the method may further include the following steps.

[0099] In step S41, the unified TCI state of the M set is determined based on the RRC configuration or default rules.

[0100] In some embodiments, the terminal may determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0101] For example, if a terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on DCI, the terminal may determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0102] For example, a terminal may have previously received RRC signaling transmitted by a network device. The RRC signaling is configured such that the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH based on the unified TCI state of the M set. The unified TCI state of the M set, as configured in the RRC signaling, is the unified TCI state of the M set among the unified TCI states of the K set determined by the second piece of information. If the terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI, the terminal may determine the unified TCI state of the M set based on the RRC signaling.

[0103] As another example, the default rule may predefine that the terminal receives PDSCH and / or the DMRS corresponding to PDSCH based on the unified TCI state of the M set. The unified TCI state of the M set predefinated by the default rule is the unified TCI state of the M set among the unified TCI states of the K set determined by the second piece of information. If the terminal cannot determine the unified TCI state corresponding to PDSCH and / or the DMRS corresponding to PDSCH based on DCI, it may determine the unified TCI state of the M set based on the default rule.

[0104] This disclosure allows for the determination of a unified TCI state for multiple sets through an RRC configuration or default rule, thereby improving downlink communication performance when the number of NZP CSI-RS resources included in a single CMR is set to multiple, by using the unified TCI state of those multiple sets to receive downlink channels or reference signals.

[0105] In the downlink communication method provided in the embodiments of this disclosure, the PDSCH and / or DMRS corresponding to the PDSCH is at least one of the following: a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on DCI (format) 1_0; a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, configured such that there is no TCI state selection field in the first DCI, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; or a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a second DCI, wherein the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is smaller than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0106] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH may be a PDSCH and / or a DMRS corresponding to the PDSCH scheduled based on DCI format 1_0. In other words, the PDSCH is a PDSCH scheduled via DCI format 1_0, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to the PDSCH scheduled via DCI format 1_0.

[0107] For example, a network device configures a PDSCH and / or a DMRS corresponding to a PDSCH, scheduled based on DCI format 1_0. In this case, this type of DCI does not include a TCI state selection field. The TCI state selection field is used to indicate the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH. In other words, this type of DCI cannot indicate the TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH. Therefore, a terminal cannot determine the unified TCI state of an M set based on DCI format 1_0. A terminal can determine the unified TCI state of an M set based on RRC configuration or default rules.

[0108] In some embodiments, if the PDSCH is a PDSCH scheduled in DCI format 1_0, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to the PDSCH scheduled in DCI format 1_0, the terminal may support receiving the PDSCH and / or the DMRS corresponding to the PDSCH using the default beam. The terminal may determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0109] In some embodiments, for PDSCH and / or DMRS corresponding to PDSCH scheduled in DCI format 1_0, the terminal may determine, based on the RRC configuration, one or more unified TCI states to use for receiving the PDSCH and / or DMRS corresponding to PDSCH. Of course, in some cases, if the RRC does not indicate a unified TCI state, the terminal may use a first set of unified TCI states directly. The first set of unified TCI states may be one set of unified TCI states from M sets of unified TCI states.

[0110] For example, a unified TCI state for a certain set is pre-configured to be used as the unified TCI state for the first set by default. If the RRC does not specify a unified TCI state, the terminal uses the unified TCI state of the first set directly to receive the PDSCH and / or the DMRS corresponding to the PDSCH.

[0111] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH may be a PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on a first DCI. In other words, the PDSCH is a PDSCH scheduled via a first DCI, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to a PDSCH scheduled via a first DCI. The first DCI is configured so that there is no TCI state selection field, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2.

[0112] For example, a network device configures a PDSCH and / or a DMRS corresponding to a PDSCH scheduled based on DCI format 1_1 or DCI format 1_2. Here, the TCI state selection field is configured not to exist in DCI format 1_1 or DCI format 1_2. That is, this type of DCI format 1_1 or DCI format 1_2 may or may not include a TCI state selection field. If the TCI state selection field is configured not to exist, this type of DCI format 1_1 or DCI format 1_2 may not include a TCI state selection field.

[0113] The TCI state selection field may be used to indicate which set or more of the K sets of unified TCI states, determined based on the second information, will be used when the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH. For example, the TCI state indication field can indicate which set or more of the K sets of unified TCI states, determined based on the second information, will be used when the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH.

[0114] In this case, since the TCI state selection field in the first DCI is configured not to exist, it is understandable that the terminal cannot determine the unified TCI state of the M set based on the first DCI. The terminal can determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0115] In some embodiments, assuming that, in the case of DCI format 1_1 or DCI format 1_2, the network device has not configured this type of DCI to indicate one or more sets of unified TCI states that the terminal will use when receiving the PDSCH and / or the DMRS corresponding to the PDSCH, and assuming that the terminal supports the use of multiple default beams, the terminal can use the default beams directly to receive the PDSCH and / or the DMRS corresponding to the PDSCH.

[0116] In some embodiments, if the PDSCH is a PDSCH scheduled via a first DCI, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to a PDSCH scheduled via a first DCI, and the first DCI is DCI format 1_1 or DCI format 1_2, and the TCI state selection field in the first DCI is set to not exist, then the terminal may support receiving the PDSCH and / or the DMRS corresponding to the PDSCH using the default beam. The terminal may determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0117] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH may be a PDSCH and / or a DMRS corresponding to the PDSCH scheduled based on a second DCI. In other words, the PDSCH is a PDSCH scheduled via a second DCI, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to a PDSCH scheduled via a second DCI. Here, 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_0, DCI format 1_1, or DCI format 1_2.

[0118] For example, a network device configures a PDSCH and / or a DMRS corresponding to a PDSCH, scheduled based on DCI format 1_0, DCI format 1_1, or DCI format 1_2. Here, the TCI state selection field in DCI format 1_1 or DCI format 1_2 may be set to exist. That is, this type of DCI format 1_1 or DCI format 1_2 may or may not include the TCI state selection field. If the TCI state selection field is set to exist, this type of DCI format 1_1 or DCI format 1_2 may include the TCI state selection field. However, the time interval between the terminal receiving the second DCI and receiving the PDSCH is shorter than a preset time interval, and / or the time interval between the terminal receiving the second DCI and receiving the DMRS corresponding to the PDSCH is shorter than a preset time interval. Here, the pre-configured time interval may be the time required for the terminal to decode the second DCI, and / or the time required for the terminal to prepare the unified TCI state. The unified TCI state related to the time required for the terminal to prepare the unified TCI state may be the unified TCI state used when receiving the PDSCH and / or the DMRS corresponding to the PDSCH. This means that if the terminal is unable to successfully decode the second DCI and / or prepare the corresponding unified TCI state before receiving the PDSCH and / or the DMRS corresponding to the PDSCH, the terminal cannot know the unified TCI state of the M set indicated by the DCI. Therefore, the terminal can determine the unified TCI state of the M set based on the RRC settings or default rules.

[0119] In this case, since the terminal cannot decode the second DCI and / or prepare the corresponding unified TCI state, it can be understood that the second DCI may or may not include a TCI state selection field indicating the unified TCI state of the M set. In other words, the second DCI may be DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0120] In some embodiments, if the terminal is unable to successfully decode the second DCI and / or prepare the corresponding unified TCI state before receiving the PDSCH and / or the DMRS corresponding to the PDSCH, the terminal may support receiving the PDSCH and / or the DMRS corresponding to the PDSCH using a default beam. The terminal may determine the unified TCI state of the M set based on the RRC configuration or default rules.

[0121] This disclosure is applicable to determining a unified TCI state for multiple sets by RRC configuration or default rules in various cases. Therefore, if the number of NZP CSI-RS resources included in a single CMR is set to multiple, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals and improve downlink communication performance.

[0122] In the downlink communication method provided in the embodiments of this disclosure, the terminal expects to receive third information used to instruct the terminal not to select from among N NZP CSI-RS resources.

[0123] In some embodiments, the terminal expects to receive third information transmitted by the network device. This third information may be used to instruct the terminal not to make a selection from among N NZP CSI-RS resources.

[0124] For example, the third piece of information and the first piece of information may be the same piece of information. That is, the first piece of information received by the terminal may not only indicate that there are N NZP CSI-RS resources included in a single CMR, but may also indicate that the terminal does not need to make a selection from among the N NZP CSI-RS resources.

[0125] For example, a terminal may want to instruct a network device not to select from N NZP CSI-RS resources. The terminal can then perform downlink communication based on N NZP CSI-RS resources. Since one NZP CSI-RS resource corresponds to one TRP or one TRP group, the terminal can use M sets of unified TCI states to receive PDSCHs transmitted by N TRPs or N TRP groups, and / or DMRSs corresponding to PDSCHs transmitted by N TRPs or N TRP groups.

[0126] For example, the terminal can perform CSI measurement and CSI feedback based on N TRPs or N TRP groups.

[0127] In this embodiment, it is evident that the terminal expects the network device to impose restrictions. In other words, the terminal expects the network device to restrict the selection of NZP CSI-RS resources by the terminal.

[0128] In this disclosure, it is expected that the terminal does not instruct the network device to select from NZP CSI-RS resources contained in a single CMR. This allows for the use of multiple sets of unified TCI states to receive downlink channels or reference signals transmitted by different TRPs, thereby improving downlink communication performance.

[0129] In the downlink communication method provided in the embodiments of this disclosure, the terminal does not receive third information used to instruct it not to make a selection from N NZP CSI-RS resources. The method may further include selecting Q NZP CSI-RS resources from N NZP CSI-RS resources, where Q is a positive integer greater than 1 and Q is less than or equal to N.

[0130] In some embodiments, if the terminal does not receive the third piece of information, it means that the network device has not instructed the terminal not to make a selection from among the N NZP CSI-RS resources. In this case, the terminal can make a selection from among the N NZP CSI-RS resources.

[0131] For example, a terminal selects Q NZP CSI-RS resources from N NZP CSI-RS resources, where Q is less than or equal to N and Q is a positive integer greater than 1.

[0132] If a network device does not instruct a terminal not to select from N NZP CSI-RS resources, it means the terminal can select from N NZP CSI-RS resources. Therefore, if the terminal selects from N NZP CSI-RS resources, it must select more than one NZP CSI-RS resource, meaning the terminal must select multiple NZP CSI-RS resources from N NZP CSI-RS resources. For example, the terminal selects Q NZP CSI-RS resources from N NZP CSI-RS resources.

[0133] In some embodiments, a terminal can report the selected Q NZP CSI-RS resources to a network device. For example, the network device can know which Q NZP CSI-RS resources the terminal has selected by sending information indicating the selected Q NZP CSI-RS resources to the network device. Based on the Q NZP CSI-RS resources selected by the terminal, the network device can perform downlink communication with the terminal (i.e., transmission of PDSCH and / or corresponding DMRS). Based on the selected Q NZP CSI-RS resources, the terminal can receive PDSCH and / or corresponding DMRS. The terminal can also perform CSI measurement and CSI feedback based on the selected Q NZP CSI-RS resources.

[0134] In this embodiment, it should be understood that the network device does not impose any constraints on the terminal; that is, the network device does not restrict the terminal from selecting NZP CSI-RS resources unless necessary. The terminal can select Q NZP CSI-RS resources from N NZP CSI-RS resources, while ensuring that Q is greater than 1. This avoids a situation where only one NZP CSI-RS resource is selected, but a unified TCI state is formed for multiple sets.

[0135] In this disclosure, if a network device does not instruct a terminal not to select from NZP CSI-RS resources contained in a single CMR, the terminal selects multiple NZP CSI-RS resources from N NZP CSI-RS resources and uses multiple sets of unified TCI states to receive downlink channels or reference signals transmitted by different TRPs, thereby improving downlink communication performance.

[0136] In the downlink communication method provided in the embodiments of this disclosure, the unified TCI state includes a joint TCI state and at least one of the uplink TCI state and the downlink TCI state.

[0137] In some embodiments, the unified TCI state includes the joint TCI state.

[0138] Here, the joint TCI state can be used for both downlink and uplink communication.

[0139] In some embodiments, the unified TCI state includes the downlink TCI state.

[0140] In some embodiments, the unified TCI state includes the uplink TCI state.

[0141] Of course, please understand that if the terminal receives PDSCH and / or DMRS corresponding to PDSCH, the unified TCI state does not include only the uplink TCI state.

[0142] In some embodiments, the unified TCI state includes a downlink TCI state and an uplink TCI state.

[0143] This disclosure provides various forms of unified TCI states, sets the number of NZP CSI-RS resources included in a single CMR to multiple, and improves downlink communication performance by deciding to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0144] Based on a similar concept, this disclosure further provides a downlink communication method performed by a network device.

[0145] Figure 6 is a flowchart of another downlink communication method according to an exemplary embodiment. As shown in Figure 6, this method can be performed by a network device. This method may include the following steps:

[0146] In step S51, the first piece of information is transmitted.

[0147] In some embodiments, a network device may transmit first information, which is used to constitute a CMR, where the CMR contains N NZP CSI-RS resources, and N is a positive integer greater than 1.

[0148] In some embodiments, the first information may be referred to as instruction information, first instruction information, configuration information, resource configuration information, etc., and this disclosure does not limit the names of the first information.

[0149] In some embodiments, a network device can transmit first information to a terminal. This first information constitutes N NZP CSI-RS resources contained in a single CMR. Based on this first information, the terminal can determine which N NZP CSI-RS resources are contained in the single CMR configured by the network device.

[0150] In some embodiments, the terminal is configured using the PDSCHCJT method. For specific CJT methods, please refer to the descriptions of the corresponding embodiments on the terminal side; repetition is omitted here.

[0151] In step S52, the PDSCH and / or the DMRS corresponding to the PDSCH are transmitted using the unified TCI state of the M set.

[0152] In some embodiments, a network device can use a unified TCI state of M sets to transmit a PDSCH and / or a DMRS corresponding to the PDSCH to a terminal, where M is a positive integer greater than 1 and less than or equal to N.

[0153] For example, a network device uses a unified TCI state of M set to transmit a PDSCH and / or a DMRS corresponding to the PDSCH to a terminal via different TRPs. Here, the unified TCI state used when transmitting the PDSCH and / or the DMRS corresponding to the PDSCH via different TRPs may be the same or different.

[0154] In some embodiments, N NZP CSI-RS resources correspond to N TRPs. A network device may use some or all of the N TRPs to send PDSCH and / or DMRS corresponding to PDSCH to a terminal using M sets of unified TCI states.

[0155] In some embodiments, the unified TCI state of M sets is two unified TCI states.

[0156] It is understood that by configuring one CMR to include multiple NZP CSI-RS resources and configuring a terminal to use multiple sets of unified TCI states to receive PDSCH and / or DMRS corresponding to PDSCH transmitted via different TRPs, a situation in which only one NZP CSI-RS resource is configured in one CMR but multiple sets of unified TCI states are determined can be avoided.

[0157] This disclosure improves downlink communication performance by setting the number of NZP CSI-RS resources included in a single CMR to multiple and deciding to use multiple sets of unified TCI states to receive downlink channels or reference signals.

[0158] In the downlink communication method provided in the embodiments of this disclosure, Figure 7 is a flowchart of yet another downlink communication method according to an exemplary embodiment. As shown in Figure 7, this method further includes the following steps.

[0159] In step S61, the second piece of information is transmitted.

[0160] In some embodiments, the network device may transmit a second piece of information used to determine the unified TCI state of K sets. The unified TCI state of M sets may be a subset of the unified TCI state of K sets, where K is a positive integer greater than 1.

[0161] For example, a network device transmits second information to a terminal. This second information indicates the unified TCI state of K sets, and the terminal can determine the unified TCI state of K sets configured by the network device based on this second information.

[0162] For example, the second piece of information directly indicates the unified TCI state of set M. That is, the unified TCI state of set K determined by the second piece of information is equal to the unified TCI state of set M. In other words, K may be equal to M.

[0163] As another example, the unified TCI states of set M are a true subset of the unified TCI states of set K, meaning that the second piece of information is used to determine the unified TCI states of set K. The number of unified TCI states in set K is greater than the number of unified TCI states in set M. In other words, K is greater than M.

[0164] In some embodiments, the K-set unified TCI state determined by the second information is two sets of unified TCI states, i.e., K is equal to 2.

[0165] In this disclosure, a network device can be instructed to receive a downlink channel or reference signal using multiple sets of unified TCI states, thereby improving downlink communication performance when a single CMR is configured to include multiple NZP CSI-RS resources.

[0166] In the downlink communication method provided in the embodiments of this disclosure, the second information is used to indicate the unified TCI state of K sets.

[0167] For embodiments where the second piece of information indicates the unified TCI state of the K set, you can refer to the corresponding descriptions of the terminal side and related embodiments, and redundant explanations will be omitted here.

[0168] This disclosure allows for the direct indication of the unified TCI state of multiple sets via a single second piece of information. Therefore, when a CMR contains multiple NZP CSI-RS resources, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0169] In the downlink communication method provided in the embodiments of this disclosure, transmitting a second piece of information may further include transmitting L pieces of second information.

[0170] In some embodiments, a network device can transmit multiple pieces of second information, for example, L pieces of second information, where L is a positive integer greater than 1, and the first L-1 pieces of second information are used to indicate one or more sets of unified TCI states, and the L-th piece of second information is used to indicate one set of unified TCI states.

[0171] For example, a network device transmits L pieces of second information. The Lth piece of second information is used to indicate one set of unified TCI states. The first L-1 pieces of second information can each indicate one or more sets of unified TCI states.

[0172] For example, L pieces of second information are three pieces of second information, namely second information 1, second information 2, and second information 3. Second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate one set of unified TCI states, namely unified TCI state 2; and second information 3 can indicate one set of unified TCI states, namely new unified TCI state 2. Alternatively, second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate two sets of unified TCI states, namely unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, namely new unified TCI state 2. As a further example, second information 1 can refer to two sets of unified TCI states, namely unified TCI state 1 and unified TCI state 2; second information 2 can refer to two sets of unified TCI states, namely unified TCI state 3 and unified TCI state 4; and second information 3 can refer to one set of unified TCI states, namely the new unified TCI state 2.

[0173] In some embodiments, the unified TCI state indicated by the Lth second piece of information is used to update the unified TCI state of one or more sets indicated by the first L-1 second pieces of information, thereby obtaining the unified TCI state of K sets.

[0174] For example, L pieces of second information are three pieces of second information, namely second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, i.e., unified TCI state 1; second information 2 can indicate one set of unified TCI states, i.e., unified TCI state 2; and second information 3 can indicate one set of unified TCI states, i.e., new unified TCI state 2. In this case, it can be determined that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1 and unified TCI state 2. Using the new unified TCI state 2 indicated by second information 3, the unified TCI state 2 determined by the first two pieces of second information is updated, and the updated K sets of unified TCI states, i.e., unified TCI state 1 and new unified TCI state 2, are obtained.

[0175] For example, L pieces of second information are three pieces of second information, namely second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate two sets of unified TCI states, namely unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, namely new unified TCI state 2. In this case, it can be determined that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1, unified TCI state 2, and unified TCI state 3. Using the new unified TCI state 2 indicated by second information 3, the unified TCI state 2 determined through the first two pieces of second information is updated, and the updated K sets of unified TCI states, namely unified TCI state 1, new unified TCI state 2, and unified TCI state 3, are obtained.

[0176] As another example, the L pieces of second information are three pieces of second information, namely second information 1, second information 2, and second information 3. Here, second information 1 can indicate one set of unified TCI states, namely unified TCI state 1; second information 2 can indicate two sets of unified TCI states, namely unified TCI state 2 and unified TCI state 3; and second information 3 can indicate one set of unified TCI states, namely unified TCI state 4. In this case, it can be determined that the unified TCI states indicated by the first two pieces of second information are unified TCI state 1, unified TCI state 2, and unified TCI state 3. Using unified TCI state 4 indicated by second information 3, the unified TCI states determined by the first two pieces of second information are updated, and the updated K sets of unified TCI states, namely unified TCI state 1, unified TCI state 2, unified TCI state 3, and unified TCI state 4, are obtained.

[0177] In the example above, if the Lth second piece of information indicates only one set of unified TCI states, it can be understood that the unified TCI states indicated by the Lth second piece of information are used to update the unified TCI states corresponding to the unified TCI states indicated by the Lth second piece of information, among the one or more sets of unified TCI states determined by the first L-1 pieces of information, while the remaining unified TCI states remain unchanged.

[0178] This disclosure allows for the indication of a unified TCI state for multiple sets through multiple pieces of second information, thereby improving downlink communication performance when the number of NZP CSI-RS resources included in a single CMR is set to multiple, by using the unified TCI state of those multiple sets to receive downlink channels or reference signals.

[0179] In the downlink communication method provided in the embodiments of the present disclosure, the second information is carried by a first MAC CE, and at least one set of unified TCI states indicated by the first MAC CE corresponds to a single code point in a TCI state indicator field carried by the DCI.

[0180] For embodiments in which the second piece of information is transported by the first MAC CE, you can refer to the corresponding descriptions of the terminal side and related embodiments, and redundant explanations will be omitted here.

[0181] This disclosure provides a possible implementation of the second information, which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, allows for the reception of downlink channels or reference signals using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0182] In the downlink communication method provided in embodiments of the present disclosure, the second information is carried by a second MAC CE and DCI, the second MAC CE is used to indicate at least one set of unified TCI states corresponding to each of the multiple code points corresponding to the TCI state indicator field carried by the DCI, and the TCI state indicator field carried by the DCI is used to indicate one of the multiple code points.

[0183] For embodiments in which the second information is transported by the second MAC CE and DCI, you can refer to the corresponding descriptions of the terminal side and related embodiments, and redundant explanations will be omitted here.

[0184] This disclosure provides a possible implementation of the second information, which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, allows for the reception of downlink channels or reference signals using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0185] In a downlink communication method provided in an embodiment of the present disclosure, the method may further include transmitting an RRC signaling, the RRC signaling being used to set a unified TCI state for an M set, or determining a unified TCI state for an M set based on a default rule, wherein the first condition is used to indicate that the terminal is unable to determine a unified TCI state for a PDSCH and / or a DMRS corresponding to a PDSCH based on DCI.

[0186] In some embodiments, a network device may transmit RRC signaling. RRC signaling is used to configure a unified TCI state for an M set. Here, a first condition is used to indicate that a terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on DCI.

[0187] For example, if a terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on DCI, the network device can send RRC signaling to the terminal and configure the terminal with an M-set unified TCI state via the RRC signaling.

[0188] For example, a network device transmits RRC signaling to a terminal in advance, and the RRC signaling is configured so that the terminal receives PDSCH and / or DMRS corresponding to PDSCH based on the unified TCI state of the M set. Here, the unified TCI state of the M set, which is comprised of the RRC signaling, is the unified TCI state of the M set among the unified TCI states of the K set determined by the second piece of information. If the terminal cannot determine the unified TCI state corresponding to PDSCH and / or DMRS corresponding to PDSCH based on DCI, the terminal can determine the unified TCI state of the M set based on the RRC signaling.

[0189] In some embodiments, the unified TCI state of the M set is determined based on default rules.

[0190] For example, a default rule can predefine that a terminal receives a PDSCH and / or a DMRS corresponding to a PDSCH based on the unified TCI state of an M set. The unified TCI state of an M set predefinitely defined by the default rule is the unified TCI state of an M set among the unified TCI states of a K set determined by second information. A network device can determine the unified TCI state of an M set based on the default rule. In some cases, the network device can determine second information based on the determined unified TCI state of an M set and notify the terminal of the unified TCI state of an M set.

[0191] For example, if the first condition is met, the network device determines the unified TCI state of the M set based on the default rules. Based on the unified TCI state of the M set, the network device determines the RRC signaling and can send the RRC signaling to the terminal to configure the unified TCI state of the M set via the RRC.

[0192] As another example, a network device determines the unified TCI state of an M set based on default rules. Based on the unified TCI state of the M set, the network device may determine one or more second pieces of information and, through that one or more pieces of second information, instruct a terminal of the unified TCI state of the M set. Alternatively, the network device may, through that one or more pieces of second information, instruct a terminal of the unified TCI state of a K set, which includes the unified TCI state of the M set.

[0193] This disclosure allows for the determination of a unified TCI state for multiple sets via RRC configuration or default rules. Therefore, when a single CMR contains multiple NZP CSI-RS resources, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0194] In the downlink communication method provided in the embodiments of this disclosure, the PDSCH and / or DMRS corresponding to the PDSCH is at least one of the following: a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on DCI format 1_0; a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, configured such that there is no TCI state selection field in the first DCI, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; or a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a second DCI, wherein the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is smaller than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0195] For examples of possible situations of the first condition, you can refer to the descriptions of the corresponding examples on the terminal side and related corresponding examples, and redundant explanations will be omitted here.

[0196] This disclosure is applicable to various situations in which the unified TCI state of multiple sets is determined by the RRC configuration or default rules, thereby improving downlink communication performance by receiving downlink channels or reference signals using the unified TCI state of multiple sets when the number of NZP CSI-RS resources included in a single CMR is set to multiple.

[0197] In the downlink communication method provided in the embodiments of this disclosure, Figure 8 is a flowchart of yet another downlink communication method according to an exemplary embodiment. As shown in Figure 8, this method may further include the following steps.

[0198] In step S71, the third piece of information is transmitted.

[0199] In some embodiments, the network device transmits third information to the terminal, which may be used to instruct the terminal not to make a selection from among N NZP CSI-RS resources.

[0200] For example, the third piece of information and the first piece of information may be the same piece of information. That is, the first piece of information can indicate N NZP CSI-RS resources contained in a single CMR, and at the same time indicate that the terminal does not need to make a selection from the N NZP CSI-RS resources.

[0201] For example, a network device instructs a terminal not to select from N NZP CSI-RS resources. The terminal can then perform downlink communication based on N NZP CSI-RS resources. Since one NZP CSI-RS resource corresponds to one TRP or one TRP group, the terminal can use M sets of unified TCI states to receive PDSCHs sent from N TRPs or N TRP groups, and / or DMRSs corresponding to PDSCHs sent from N TRPs or N TRP groups.

[0202] For example, the terminal can perform CSI measurement and CSI feedback based on N TRPs or N TRP groups.

[0203] In this disclosure, the terminal expects that the network device will not instruct the terminal to select from NZP CSI-RS resources contained in a single CMR, thereby improving downlink communication performance by using multiple sets of unified TCI states to receive downlink channels or reference signals transmitted from different TRPs.

[0204] In the downlink communication method provided in the embodiments of this disclosure, the unified TCI state includes at least one of the joint TCI state, the uplink TCI state, and the downlink TCI state.

[0205] For embodiments that constitute a unified TCI state, you can refer to the corresponding descriptions of the terminal-side embodiments and related embodiments, and please understand that this disclosure omits redundant explanations.

[0206] This disclosure provides various forms of unified TCI states. Downlink communication performance is improved by setting the number of NZP CSI-RS resources included in a single CMR to multiple and deciding to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0207] Those skilled in the art will understand that the various implementations / implementations described above in the embodiments of this disclosure can be used in combination with the aforementioned embodiments or independently. Whether used independently or in combination with the aforementioned embodiments, the implementation principle is the same. In this disclosure, some embodiments are described as being implemented together. Of course, those skilled in the art will understand that such illustrative descriptions do not limit the embodiments of this disclosure.

[0208] Based on a similar concept, embodiments of this disclosure also provide downlink communication devices.

[0209] It is understood that the downlink communication devices or devices provided in the embodiments of this disclosure include hardware structures and / or software modules corresponding to the execution of each function in order to realize the functions described above. Together with the various example units and algorithmic steps disclosed in the embodiments of this disclosure, the embodiments of this disclosure can be implemented in hardware or in combination of hardware and computer software. Whether a function is implemented by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for each specific application, but such implementations should not be considered to exceed the scope of the technical solutions of the embodiments of this disclosure.

[0210] Figure 9 is a schematic diagram of a downlink communication device according to an exemplary embodiment. Referring to Figure 9, the device 200 comprises a receiving module 201 configured to receive first information used to constitute a CMR, the CMR comprising N NZP CSI-RS resources, where N is a positive integer greater than 1; and a processing module 202 configured to determine that the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH is a unified TCI state of M sets, where M is a positive integer greater than 1, and M is less than or equal to N, wherein the receiving module 201 is further configured to receive the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of M sets.

[0211] This disclosure describes how to improve downlink communication performance by configuring a single CMR to include multiple NZP CSI-RS resources and determining to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0212] In some embodiments, the receiving module 201 is further configured to receive second information, which is used to determine a unified TCI state of K sets, where the unified TCI state of M sets is a subset of the unified TCI state of K sets, and K is a positive integer greater than 1.

[0213] This disclosure improves downlink communication performance when the number of NZP CSI-RS resources in a single CMR is configured to be multiple, by instructing network devices to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0214] In some embodiments, the second piece of information is used to indicate the unified TCI state of the K set.

[0215] This disclosure allows for the direct indication of the unified TCI state of multiple sets via a single second piece of information. Therefore, when a CMR contains multiple NZP CSI-RS resources, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0216] In some embodiments, the receiving module 201 is further configured to receive L second pieces of information, where L is a positive integer greater than 1, the first L-1 pieces of second pieces of information are used to indicate one or more sets of unified TCI states, the Lth second piece of information is used to indicate one set of unified TCI states. The processing module 202 is further configured to update the one or more sets of unified TCI states indicated by the first L-1 pieces of second pieces of information using the unified TCI states indicated by the Lth second piece of information, thereby obtaining K sets of unified TCI states.

[0217] This disclosure allows for the indication of a unified TCI state for multiple sets through multiple pieces of second information, thereby improving downlink communication performance when the number of NZP CSI-RS resources included in a single CMR is set to multiple, by using the unified TCI state of those multiple sets to receive downlink channels or reference signals.

[0218] In some embodiments, the second information is carried by the first media access control element (MAC CE). At least one set of unified TCI states indicated by the first MAC CE corresponds to a single code point in the TCI state indicator field carried in the downlink control information (DCI).

[0219] This disclosure provides a possible implementation of the second information to improve downlink communication performance by receiving downlink channels or reference signals using a set of unified TCI states determined through the second information when the number of NZP CSI-RS resources included in a single CMR is set to multiple.

[0220] In some implementations, the second information is carried by a second MAC CE and DCI. The second MAC CE is used to indicate at least one set of unified TCI states corresponding to each of the multiple code points corresponding to the TCI state indicator field carried by the DCI, and the TCI state indicator field carried by the DCI is used to indicate one of the multiple code points.

[0221] This disclosure provides one possible implementation of the second information, in which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, a downlink channel or reference signal is received using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0222] In some implementations, the processing module 202 is further configured to determine the unified TCI state of the M set based on a radio resource control (RRC) configuration or default rules.

[0223] This disclosure allows for determining a unified TCI state for multiple sets through RRC configuration or default rules. Therefore, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, the downlink communication performance can be improved by receiving the downlink channel or reference signal using the unified TCI state of those multiple sets.

[0224] In some implementations, the PDSCH and / or DMRS corresponding to the PDSCH is at least one of the following: a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on DCI format 1_0; a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, configured such that there is no TCI state selection field in the first DCI, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; or a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a second DCI, where the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is smaller than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0225] This disclosure is applicable to various cases in which the unified TCI state of multiple sets is determined by the RRC configuration or default rules. Therefore, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, the unified TCI state of these multiple sets is used to receive downlink channels or reference signals and improve downlink communication performance.

[0226] In some embodiments, the terminal expects to receive third information used to instruct the terminal not to make a selection from among N NZP CSI-RS resources.

[0227] In this disclosure, the terminal expects that the network device will not instruct the terminal to select from NZP CSI-RS resources contained in a single CMR, thereby improving downlink communication performance by using multiple sets of unified TCI states to receive downlink channels or reference signals transmitted by different TRPs.

[0228] In some embodiments, the terminal does not receive third information used to instruct it not to make a selection from among N NZP CSI-RS resources. The processing module 202 is further configured to select Q NZP CSI-RS resources from N NZP CSI-RS resources, where Q is a positive integer greater than 1 and Q is less than or equal to N.

[0229] In this disclosure, if a network device does not instruct the terminal not to select from the NZP CSI-RS resources included in the CMR, the terminal selects multiple NZP CSI-RS resources from N NZP CSI-RS resources and uses multiple sets of unified TCI states to receive downlink channels or reference signals transmitted by different TRPs, thereby improving downlink communication performance.

[0230] In some embodiments, a unified TCI state includes a joint TCI state and at least one of an uplink TCI state and a downlink TCI state.

[0231] This disclosure provides various forms of unified TCI states, sets the number of NZP CSI-RS resources included in a single CMR to multiple, and improves downlink communication performance by deciding to receive downlink channels or reference signals using multiple sets of unified TCI states.

[0232] Figure 10 is a schematic diagram of another downlink communication device according to an exemplary embodiment. Referring to Figure 10, the device 300 includes a transmitting module 301 configured to transmit first information, which is used to constitute a CMR, the CMR containing N NZP CSI-RS resources, where N is a positive integer greater than 1. The transmitting module 301 is further configured to transmit a PDSCH and / or a DMRS corresponding to the PDSCH using M sets of unified TCI states, where M is a positive integer greater than 1, and M is less than or equal to N.

[0233] This disclosure improves downlink communication performance by setting the number of NZP CSI-RS resources included in a single CMR to multiple and deciding to receive downlink channels or reference signals using a unified TCI state of multiple sets.

[0234] In some implementations, the transmitting module 301 is further configured to transmit a second piece of information, which the terminal uses to determine a K-set unified TCI state, where M sets of unified TCI states are a subset of the K-set unified TCI states, and K is a positive integer greater than 1.

[0235] In this disclosure, a network device can be instructed to receive a downlink channel or reference signal using a unified TCI state for multiple sets, thereby improving downlink communication performance when the number of NZP CSI-RS resources included in a single CMR is configured to be multiple.

[0236] In some embodiments, the second piece of information is used to indicate K unified TCI states.

[0237] This disclosure allows for the direct indication of the unified TCI state of multiple sets via a single second piece of information. Therefore, when a single CMR contains multiple NZP CSI-RS resources, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0238] In some embodiments, the transmitting module 301 is further configured to transmit L pieces of second information, where L is a positive integer greater than 1, the first L-1 pieces of second information are used to indicate one or more sets of unified TCI states, the Lth piece of second information is used to indicate one set of unified TCI states, and the unified TCI states indicated by the Lth piece of second information are further used to update one or more sets of unified TCI states indicated by the first L-1 pieces of second information.

[0239] This disclosure allows for the indication of a unified TCI state for multiple sets via multiple second pieces of information. Therefore, if the number of NZP CSI-RS resources included in a single CMR is set to multiple, the unified TCI state for these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0240] In some implementations, the second information is carried via a first media access control element (MAC CE), and at least one set of unified TCI states indicated by the first MAC CE corresponds to a single code point in a TCI state indicator field carried in the downlink control information (DCI).

[0241] This disclosure provides one possible implementation of the second information to receive downlink channels or reference signals using a set of unified TCI states determined by the second information when the number of NZP CSI-RS resources included in a single CMR is set to multiple, thereby improving downlink communication performance.

[0242] In some implementations, the second information is carried by a second MAC CE and DCI, the second MAC CE is used to indicate at least one set of unified TCI states corresponding to each of the multiple code points corresponding to the TCI state indicator fields carried by the DCI, and the TCI state indicator fields carried by the DCI are used to indicate one of the multiple code points.

[0243] This disclosure provides a possible implementation of the second information, which, when the number of NZP CSI-RS resources included in a single CMR is set to multiple, allows for the reception of a downlink channel or reference signal using multiple sets of unified TCI states determined through the second information, thereby improving downlink communication performance.

[0244] In some embodiments, a transmitting module 301 included in the device 300 is further configured to transmit radio resource control (RRC) signaling, which is used to configure a unified TCI state for the M set. Alternatively, the device 300 further includes a processing module 302 configured to determine a unified TCI state for the M set based on default rules, the first condition being used to indicate that the terminal cannot determine a unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on DCI.

[0245] This disclosure allows for the determination of a unified TCI state for multiple sets through RRC configuration or default rules. Therefore, when the number of NZPCSI-RS resources included in a single CMR is set to multiple, the unified TCI state of these multiple sets can be used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0246] In some implementations, the PDSCH and / or DMRS corresponding to the PDSCH is at least one of the following: a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on DCI format 1_0; a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, configured such that there is no TCI state selection field in the first DCI, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; or a PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a second DCI, where the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is smaller than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0247] This disclosure is applicable to various situations in which the unified TCI state of multiple sets is determined by the RRC configuration or default rules, and when the number of NZP CSI-RS resources included in a single CMR is set to multiple, the unified TCI state of these multiple sets is used to receive downlink channels or reference signals and improve downlink communication performance.

[0248] In some embodiments, the transmitting module 301 is further configured to transmit third information used to instruct the terminal not to make a selection from N NZP CSI-RS resources.

[0249] In this disclosure, the terminal expects that the network device will not instruct the terminal to select from NZP CSI-RS resources contained in a single CMR, and the terminal uses multiple sets of unified TCI states to receive downlink channels or reference signals transmitted by different TRPs to improve downlink communication performance.

[0250] In some embodiments, a unified TCI state includes a joint TCI state and at least one of an uplink TCI state and a downlink TCI state.

[0251] This disclosure provides various forms of unified TCI states, sets the number of NZP CSI-RS resources included in a single CMR to multiple, and improves downlink communication performance by deciding to use multiple sets of unified TCI states to receive downlink channels or reference signals.

[0252] It is understood that the aforementioned device 200 may further include a transmitting module for performing steps related to transmission by device 200, and device 300 may further include a receiving module for performing steps related to reception by device 300. Of course, devices 200 and 300 may include more possible modules to realize the corresponding functions, and the disclosure is not limited thereto.

[0253] The specific methods by which each module performs its operation in the apparatus of the above embodiment are described in detail in the embodiment related to the method, and will not be described in detail here.

[0254] Figure 11 is a schematic diagram of a downlink communication device according to an exemplary embodiment. For example, the device 400 may be any terminal such as a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet, medical device, exercise equipment, or personal digital assistant.

[0255] As shown in Figure 11, device 400 may include one or more of the following components: processing component 402, memory 404, power supply component 406, multimedia component 408, audio component 410, input / output (I / O) interface 412, sensor component 414, and communication component 416.

[0256] The processing component 402 typically controls the overall operation of the device 400, including operations related to the display, calls, data communication, camera operation, and recording operation. The processing component 402 may include one or more processors 420 that execute instructions to perform all or part of the steps of the method described above. Furthermore, the processing component 402 may include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module that facilitates interaction between the multimedia component 408 and the processing component 402.

[0257] Memory 404 is configured to store various types of data to support the operation of device 400. Examples of such data include instructions for any application or method running on device 400, contact data, phonebook data, messages, images, videos, etc. Memory 404 can be implemented using any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0258] The power supply component 406 supplies power to various components of device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components related to the generation, management, and distribution of power in device 400.

[0259] The 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 for receiving input signals from the user. The touch panel includes one or more touch sensors for sensing touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of a touch or swipe operation but also the time interval and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 408 includes a front camera and / or a rear camera. The front camera and rear camera may receive external multimedia data while the device 400 is in an operating mode such as shooting mode or video mode. The front camera and rear camera may each be a fixed optical lens system or may have focus and optical zoom capabilities.

[0260] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) configured to receive external audio signals when the device 400 is in an operating mode such as call mode, recording mode, or voice recognition mode. The received audio signals are further stored in memory 404 or transmitted via communication component 416. In some embodiments, the audio component 410 further includes a speaker that outputs audio signals.

[0261] The I / O interface 412 provides an interface between the processing component 402 and peripheral interface modules such as a keyboard, click wheel, and buttons. Buttons include, but are not limited to, the home button, volume buttons, start button, and lock button.

[0262] The sensor component 414 includes one or more sensors for providing state evaluation of various aspects of the device 400. For example, the sensor component 414 can detect the open / closed state of the device 400, the relative position of components (e.g., the display or keypad of the device 400), changes in the position of the device 400 or one of its components, whether or not a user is touching the device 400, the orientation or acceleration / deceleration of the device 400, and temperature changes of the device 400. The sensor component 414 may include proximity sensors configured to detect the presence of nearby objects without physical contact. The sensor component 414 may also include optical sensors, such as CMOS or CCD image sensors, for use in imaging applications. In some embodiments, the sensor component 414 may also include acceleration sensors, gyroscopes, magnetic sensors, pressure sensors, or temperature sensors.

[0263] The 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, 3G, or a combination thereof. In one exemplary embodiment, the communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 416 further includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data communication (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0264] In exemplary embodiments, device 400 may be implemented using one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing units (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above method.

[0265] In exemplary embodiments, a non-temporary computer-readable storage medium containing instructions is also provided, such as a memory 404 containing instructions executable by a processor 420 within device 400, in order to carry out the above method. For example, the non-temporary computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

[0266] Figure 12 is a schematic diagram of another downlink communication device according to an exemplary embodiment. For example, device 500 may be provided as a base station or a server. Referring to Figure 12, device 500 includes a processing component 522 comprising one or more processors, and a memory resource represented by memory 532 for storing instructions (e.g., application programs) that can be executed by the processing component 522. The application programs stored in memory 532 may include one or more modules, each corresponding to an instruction set. Furthermore, the processing component 522 is configured to execute instructions for performing the above method.

[0267] Device 500 may also include a power supply component 526 configured to manage the power 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 may operate based on an operating system (e.g., Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.) stored in memory 532.

[0268] In this disclosure, when a PDSCH CJT transmission is configured such that one CMR of the CJT includes multiple NZP CSI-RS resources and the default beam is two indicatedTCI states, this disclosure imposes base station limitations or UE operation limitations to improve PDSCH-CJT transmission performance.

[0269] Furthermore, it should be understood that “plural” in this disclosure refers to two or more, and the same applies to other quantifiers. The expression “and / or” describes a relationship between related objects and indicates that three relationships may exist. For example, A and / or B can mean A alone, A and B together, and B alone. The letter “ / ” generally indicates that the related objects before and after the letter are in an “or” relationship. The singular forms “one,” “the said,” and “the said” also include the plural forms unless the context explicitly indicates otherwise.

[0270] Furthermore, while terms such as “first,” “second,” etc., are used to describe various types of information, it should be understood that the information is not limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate any particular order or importance. In fact, expressions such as “first,” “second,” etc., are fully interchangeable. For example, without departing from the scope of this disclosure, first information may also be called second information, and similarly, second information may also be called first information.

[0271] Furthermore, it should be understood that the meaning of phrases such as “in response to” and “if” as used in this disclosure depends on the context and the actual usage scenario. For example, the phrase “in response to” as used herein may be interpreted as “when,” “at the time,” “if,” or “in the case of.”

[0272] Furthermore, while the operations in the embodiments of this disclosure are described in a specific order in the accompanying drawings, it should not be construed as requiring the operations to be performed in a specific order or sequence shown in the drawings, nor as requiring all of the indicated operations to be performed in order to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0273] Other embodiments of the present disclosure will be apparent to those skilled in the art by considering this specification and its implementation. This application is intended to cover all variations, uses, or adaptations of the present disclosure, including those that deviate from the present disclosure but fall within the scope of known or customary practice in the art, while adhering to the general principles of the present disclosure.

[0274] This disclosure is not limited to the configuration described above and shown in the accompanying drawings, and it will be understood that various modifications and changes are possible without departing from its scope. The scope of this disclosure is intended to be limited only by the attached claims.

Claims

1. A downlink communication method performed by a terminal, A step of receiving first information used to constitute a single channel measurement resource (CMR), wherein the CMR comprises N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1; A step of determining a Unified Transmit Configuration Instruction (TCI) state corresponding to a Physical Downlink Shared Channel (PDSCH) and / or a Demodulation Reference Signal (DMRS) corresponding to a PDSCH as the Unified TCI state of an M set, wherein M is a positive integer greater than 1 and M is less than or equal to N; The step includes receiving the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of the M set. A downlink communication method characterized by the following features.

2. The aforementioned method, The step of receiving second information used to determine the unified TCI state of K sets, the unified TCI state of M sets being a subset of the unified TCI state of K sets, where K is a positive integer greater than 1. The downlink communication method according to feature 1.

3. The second piece of information is used to indicate the unified TCI state of the K set. The downlink communication method according to feature 2.

4. The step of receiving the second information described above is: The process includes receiving L pieces of the aforementioned second information, where L is a positive integer greater than 1, and the first L-1 pieces of second information are used to indicate one or more sets of unified TCI states, and the L-th piece of second information is used to indicate one set of unified TCI states. The aforementioned method, The step further includes updating the unified TCI state of one or more sets indicated by the first L-1 second pieces of information using the unified TCI state indicated by the L-th second piece of information, and obtaining the unified TCI state of the K sets. The downlink communication method according to claim 2 or 3, characterized by the features described above.

5. The second information is carried by a first media access control element (MAC CE), and at least one set of unified TCI states indicated by the first MAC CE corresponds to a single code point in a TCI state indicator field carried by downlink control information (DCI). The downlink communication method according to any one of claims 2 to 4.

6. The second information is carried by a second MAC CE and DCI, the second MAC CE is used to indicate at least one set of unified TCI states corresponding to each code point in a plurality of code points corresponding to the TCI state indicator field carried by the DCI, and the TCI state indicator field carried by the DCI is used to indicate one code point in the plurality of code points. The downlink communication method according to any one of claims 2 to 4.

7. The aforementioned method, The step further includes determining the unified TCI state of the M set based on a radio resource control (RRC) configuration or default rules. The downlink communication method according to feature 1.

8. The PDSCH and / or the DMRS corresponding to the PDSCH are: The PDSCH and / or the DMRS corresponding to the PDSCH, scheduled based on DCI format 1_0; A PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, wherein the TCI state selection field in the first DCI is absent, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; A PDSCH and / or DMRS corresponding to a PDSCH scheduled based on a second DCI, wherein the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2; at least one PDSCH and / or DMRS corresponding to a PDSCH. The downlink communication method according to feature 7.

9. The terminal expects to receive a third piece of information, which is used to instruct the terminal not to make a selection from the N NZP CSI-RS resources. The downlink communication method according to any one of claims 1 to 8.

10. The terminal has not received third information used to instruct it not to make a selection from the N NZP CSI-RS resources, and the method A step of selecting Q NZP CSI-RS resources from the N NZP CSI-RS resources, further comprising the step of Q being a positive integer greater than 1 and Q being less than or equal to N The downlink communication method according to any one of claims 1 to 8.

11. The aforementioned unified TCI state is, Joint TCI status, Includes at least one of the uplink TCI state and the downlink TCI state, and at least one of the A downlink communication method according to any one of claims 1 to 10, characterized by the following:

12. A downlink communication method performed by a network device, A step of transmitting first information used to constitute a single channel measurement resource (CMR), wherein the CMR comprises N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1; The process includes the step of transmitting a physical downlink shared channel (PDSCH) and / or a demodulation reference signal (DMRS) corresponding to the PDSCH using the Unified Transmitting Configuration Instruction (TCI) state of the M set, wherein M is a positive integer greater than 1 and M is less than or equal to N. A downlink communication method characterized by the following features.

13. The aforementioned method, A step of transmitting second information used to determine the unified TCI state of K sets, the unified TCI state of M sets being a subset of the unified TCI state of K sets, where K is a positive integer greater than 1. The downlink communication method according to feature 12.

14. The second piece of information is used to indicate the unified TCI state of the K set. The downlink communication method according to feature 13.

15. The step of transmitting the second information described above is: The step includes transmitting L pieces of the aforementioned second information, L is a positive integer greater than 1, where the first L-1 pieces of second information are used to indicate one or more sets of unified TCI states, the L-th piece of second information is used to indicate one set of unified TCI states, and the unified TCI states indicated by the L-th piece of second information are further used to update one or more sets of unified TCI states indicated by the first L-1 pieces of second information. The downlink communication method according to feature 13 or 14.

16. The second information is carried by a first media access control element (MAC CE), and at least one set of unified TCI states indicated by the first MAC CE corresponds to a single code point in a TCI state indicator field carried by downlink control information (DCI). The downlink communication method according to any one of claims 13 to 15, characterized by the features described herein.

17. The second information is carried by a second MAC CE and DCI, the second MAC CE is used to indicate at least one set of unified TCI states corresponding to each code point in a plurality of code points corresponding to the TCI state indicator field carried by the DCI, and the TCI state indicator field carried by the DCI is used to indicate one code point in the plurality of code points. The downlink communication method according to any one of claims 13 to 15, characterized by the features described herein.

18. The aforementioned method, The step of transmitting radio resource control (RRC) signaling used to configure the unified TCI state of the M set, or The unified TCI state of the M set is further stepped based on the default rules, including The downlink communication method according to feature 12.

19. The PDSCH and / or the DMRS corresponding to the PDSCH are: The PDSCH and / or the DMRS corresponding to the PDSCH, scheduled based on DCI format 1_0; A PDSCH and / or DMRS corresponding to the PDSCH scheduled based on a first DCI, wherein the TCI state selection field in the first DCI is absent, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; A PDSCH and / or DMRS corresponding to a PDSCH scheduled based on a second DCI, wherein the time interval between the second DCI and the PDSCH and / or DMRS corresponding to the PDSCH is less than a time threshold, and the DCI format corresponding to the second DCI is DCI format 1_0, DCI format 1_1, or DCI format 1_2; at least one PDSCH and / or DMRS corresponding to a PDSCH. The downlink communication method according to feature 18.

20. The aforementioned method, The step further includes transmitting a third piece of information used to instruct the terminal not to make a selection from the N NZP CSI-RS resources. The downlink communication method according to any one of claims 12 to 19, characterized by the features described herein.

21. The aforementioned unified TCI state is, Joint TCI status, Includes at least one of the uplink TCI state and the downlink TCI state, and at least one of the The downlink communication method according to any one of claims 12 to 20, characterized by the features described herein.

22. It comprises a receiving module and a processing module, The receiving module is configured to receive first information used to constitute a single channel measurement resource (CMR), the CMR comprising N non-zero power channel state information reference signal (NZP CSI-RS) resources, where N is a positive integer greater than 1. The processing module is configured to determine the Unified Transmit Configuration Instruction (TCI) state corresponding to the Physical Downlink Shared Channel (PDSCH) and / or the Demodulation Reference Signal (DMRS) corresponding to the PDSCH as the Unified TCI state of the M set, where M is a positive integer greater than 1, and M is less than or equal to N. The receiving module is also configured to receive the PDSCH and / or the DMRS corresponding to the PDSCH using the unified TCI state of the M set. A downlink communication device characterized by the following features.

23. A transmitting module configured to transmit first information used to constitute a single channel measurement resource (CMR), wherein the CMR includes N non-zero power channel state information reference signal (NZP CSI-RS) resources, and the transmitting module comprises a transmitting module where N is a positive integer greater than 1. The transmitting module is also configured to transmit a physical downlink shared channel (PDSCH) and / or a demodulation reference signal (DMRS) corresponding to the PDSCH using the Unified Transmit Configuration Instruction (TCI) state of the M set, where M is a positive integer greater than 1 and M is less than or equal to N. A downlink communication device characterized by the following features.

24. It comprises a processor and memory that stores instructions that can be executed by the processor, The processor is configured to perform the method described in any one of claims 1 to 11. A downlink communication device characterized by the following features.

25. It comprises a processor and memory that stores instructions that can be executed by the processor, The processor is configured to perform the method described in any one of claims 12 to 21. A downlink communication device characterized by the following features.

26. A non-temporary computer-readable storage medium, wherein when an instruction in the storage medium is executed by the terminal's processor, the terminal can perform the method according to any one of claims 1 to 11. A non-temporary, computer-readable storage medium characterized by the following features.

27. A non-temporary computer-readable storage medium, wherein when instructions in the storage medium are executed by the processor of a network device, the network device can perform the method according to any one of claims 12 to 21. A non-temporary, computer-readable storage medium characterized by the following features.

Images