Downlink communication method, apparatus and device, and storage medium

Abstract

The present disclosure relates to a downlink communication method, apparatus and device, and a storage medium. The downlink communication method comprises: receiving first information, wherein the first information is used for configuring a channel measurement resource (CMR), and the CMR comprises N non-zero power channel state information reference signal (NZP CSI-RS) resources, N being a positive integer greater than 1; determining unified transmission configuration indication (TCI) states, which correspond to physical downlink shared channels (PDSCHs) and / or demodulation reference signals (DMRSs) corresponding to the PDSCHs, to be M sets of unified TCI states, M being a positive integer greater than 1, and M being less than or equal to N; and using the M sets of unified TCI states to receive the PDSCHs and / or the DMRSs corresponding to the PDSCHs. In the present disclosure, the number of NZP CSI-RS resources comprised in one channel measurement resource is configured to be multiple, and it is determined that a plurality of sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving the communication performance of a downlink.

Description

Downlink communication method, device, equipment and storage medium Technical Field

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

[0002] Currently, some proposals are discussing coherent joint transmission (CJT) for the physical downlink shared channel (PDSCH). This allows up to four transmission and reception points (TRPs) to simultaneously serve a single terminal.

[0003] Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a downlink communication method, apparatus, device and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a downlink communication method is provided, including: receiving first information, the first information being used to configure a channel measurement resource CMR, wherein the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, where N is a positive integer greater than 1; determining that the 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 is 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.

[0006] According to a second aspect of an embodiment of the present disclosure, a downlink communication method is provided, including: sending first information, the first information being used to configure a channel measurement resource CMR, wherein the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, where N is a positive integer greater than 1; using M sets of unified transmission configuration indication TCI states to send a physical downlink shared channel PDSCH and / or a demodulation reference signal DMRS corresponding to the PDSCH, wherein M is a positive integer greater than 1, and M is less than or equal to N.

[0007] According to a third aspect of an embodiment of the present disclosure, a downlink communication device is provided, the device including: a receiving module for receiving first information, the first information being used to configure a channel measurement resource CMR, wherein 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; a processing module for determining that the 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 is M sets of unified TCI states, wherein M is a positive integer greater than 1, and M is less than or equal to N; the receiving module is also used to receive the PDSCH and / or the DMRS corresponding to the PDSCH using the M sets of unified TCI states.

[0008] According to the fourth aspect of an embodiment of the present disclosure, a downlink communication device is provided, the device including: a sending module for sending first information, the first information being used to configure a channel measurement resource CMR, wherein 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; the sending module is also used to use M sets of unified transmission configuration indication TCI states to send a physical downlink shared channel PDSCH and / or a demodulation reference signal DMRS corresponding to the PDSCH, wherein M is a positive integer greater than 1, and M is less than or equal to N.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a downlink communication device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the first aspect and any one of the methods in the first aspect.

[0010] According to the sixth aspect of an embodiment of the present disclosure, a downlink communication device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the second aspect and any one of the methods in the second aspect.

[0011] According to the seventh aspect of the embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided, which, when the instructions in the storage medium are executed by the processor of the terminal, enables the terminal to execute the first aspect and any one of the methods in the first aspect.

[0012] According to an eighth aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the second aspect and any one of the methods in the second aspect.

[0013] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by configuring the number of non-zero power channel state information reference signal resources included in a channel measurement resource to be multiple, and determining the use of multiple sets of unified TCI states to receive downlink channels or reference signals, thereby improving the communication performance of the downlink.

[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0016] Fig. 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment.

[0017] Fig. 2 is a flow chart showing a downlink communication method according to an exemplary embodiment.

[0018] Fig. 3 is a flow chart showing another downlink communication method according to an exemplary embodiment.

[0019] Fig. 4 is a flow chart showing yet another downlink communication method according to an exemplary embodiment.

[0020] Fig. 5 is a flow chart showing yet another downlink communication method according to an exemplary embodiment.

[0021] Fig. 6 is a flow chart showing another downlink communication method according to an exemplary embodiment.

[0022] Fig. 7 is a flow chart showing yet another downlink communication method according to an exemplary embodiment.

[0023] Fig. 8 is a flowchart showing yet another downlink communication method according to an exemplary embodiment.

[0024] Fig. 9 is a schematic diagram of a downlink communication device according to an exemplary embodiment.

[0025] Fig. 10 is a schematic diagram showing another downlink communication device according to an exemplary embodiment.

[0026] Fig. 11 is a schematic diagram showing a downlink communication device according to an exemplary embodiment.

[0027] Fig. 12 is a schematic diagram showing another downlink communication device according to an exemplary embodiment. DETAILED DESCRIPTION

[0028] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0029] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0030] The communication method involved in the present disclosure can be applied to the wireless communication system 100 shown in Figure 1. The network system may include a network device 110 and a terminal 120. It will be understood that the wireless communication system shown in Figure 1 is merely for illustrative purposes, and the wireless communication system may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices, which are not shown in Figure 1. The embodiments of the present disclosure do not limit the number of network devices and terminals included in the wireless communication system.

[0031] It can be further understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier-frequency division multiple access (SC-FDMA), and carrier sense multiple access with collision avoidance. According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (generation, G) network, 3G network, 4G network, or future evolution network, such as the 5th generation wireless communication system (5G) network. The 5G network can also be called a new radio (NR). For the convenience of description, the present disclosure sometimes refers to the wireless communication network as simply a network.

[0032] Furthermore, the network device 110 involved 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 wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a TRP, etc. It may also be a gNB in ​​an NR system, or it may also be a component or part of a base station. When it is a vehicle to everything (V2X) communication system, the access network device may also be a vehicle-mounted device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the access network device are not limited.

[0033] Furthermore, the terminal 120 involved in the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: smart phones (mobile phones), pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle network communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0034] In the embodiments of the present disclosure, the network device 110 and the terminal 120 can use any feasible wireless communication technology to achieve mutual data transmission. The transmission channel corresponding to the transmission of data from the network device 110 to the terminal 120 is called the downlink (DL), and the transmission channel corresponding to the transmission of data from the terminal 120 to the network device 110 is called the uplink (UL). It is understood that the network device involved in the embodiments of the present disclosure can be a base station. Of course, the network device can also be any other possible network device, and the terminal can be any possible terminal, and this disclosure is not limited thereto.

[0035] In related solutions, a CJT-based approach for PDSCH is being discussed, that is, for the same terminal, up to 4 TRPs can be supported to provide services to the terminal at the same time.

[0036] In some embodiments, a TRP may be replaced by a TRP group, i.e., a TRP group may include one or more TRPs. For ease of description, the embodiments of the present disclosure will be described using TRP as an example, but it should be understood that the same is also applicable to TRP groups, and the present disclosure is not limited thereto.

[0037] The specific number of TRPs used to send PDSCH and / or a demodulation reference signal (DMRS) corresponding to PDSCH to the terminal may be determined by a network device or by the terminal itself.

[0038] In some embodiments, the network device may configure a channel measurement resource (CMR) for the terminal. Assuming that a CMR contains only one non-zero power (NZP) channel state information reference signal (CSI-RS) resource, it means that the network device configures a TRP for the terminal to send PDSCH and / or DMRS corresponding to PDSCH to the terminal. Among them, one NZP CSI-RS resource corresponds to one TRP, so one NZP CSI-RS resource can also be understood as a TRP. In this case, the terminal does not need to select the NZP CSI-RS resource. The terminal can directly perform channel state information (CSI) feedback for the NZP CSI-RS resource included in the CMR. For example, the selection indication of the spatial domain (SD) basis vector, the selection indication of the frequency domain (FD) basis vector, the non-zero coefficient report, the rank report, etc. can be fed back.

[0039] In some embodiments, the network device can configure a CMR for the terminal. Assume that a CMR contains multiple NZP CSI-RS resources, such as N, where N is a positive integer greater than 1. The network device indicates that the terminal does not need to select from the N NZP CSI-RS resources, that is, the network device indicates that the terminal does not need to select some NZP CSI-RS resources from the N NZP CSI-RS resources. The terminal can directly provide CSI feedback for the N NZP CSI-RS resources configured by the network device, and the network device uses the N TRPs corresponding to the N NZP CSI-RS resources to send PDSCH and / or DMRS corresponding to the PDSCH to the terminal.

[0040] In some embodiments, the network device can configure a CMR for the terminal. Assume that a CMR contains multiple NZP CSI-RS resources, such as N. And the network device does not indicate that the terminal does not need to select from the N NZP CSI-RS resources. Then for the terminal, Q NZP CSI-RS resources can be further selected from the N NZP CSI-RS resources. Among them, Q is less than or equal to N. After selecting the Q NZP CSI-RS resources, the terminal can inform the network device which Q NZP CSI-RS resources are selected. For example, N bits can be used, that is, each NZP CSI-RS resource can correspond to 1 bit for indication. A bit value of 1 can indicate selection, and a bit value of 0 can indicate non-selection. Of course, in other cases, a bit value of 0 can indicate selection, and a bit value of 1 can indicate non-selection. The specific adaptive adjustment can be made according to the actual situation. The present disclosure does not limit the specific meaning of each bit value. The terminal can also simultaneously report the CSI obtained by channel measurement for the selected Q NZP CSI-RS resources.

[0041] In some cases, a terminal may determine, based on network device configuration or default rules, to use multiple unified transmission configuration indication (TCI) states to receive PDSCH and / or DMRS corresponding to the PDSCH. A unified TCI state may also be referred to as an indicated TCI state.

[0042] However, if a CMR configured by a network device includes multiple NZP CSI-RS resources, there may be a situation where the terminal selects only one of the multiple NZP CSI-RS resources, but multiple sets of unified TCI states are determined by radio resource control (RRC) configuration or default rules. In this case, the network device will not be able to transmit PDSCH and / or DMRS corresponding to PDSCH, and the terminal will not be able to receive PDSCH and / or DMRS corresponding to PDSCH.

[0043] Therefore, the present disclosure provides a downlink communication method, which improves the downlink communication performance by configuring the number of NZP CSI-RS resources included in a CMR to be multiple, and determining to use multiple sets of unified TCI states to receive downlink channels or reference signals.

[0044] It should be noted that in the various embodiments described below in the present disclosure, only TRP is used as an example for detailed description. Of course, in other embodiments, TRP can be replaced by TRP group, which is not limited in the present disclosure.

[0045] FIG2 is a flow chart showing a downlink communication method according to an exemplary embodiment. As shown in FIG2 , the method may be executed by a terminal, and the method may include the following steps:

[0046] In step S11, first information is received.

[0047] In some embodiments, a terminal may receive first information for configuring a CMR, wherein the CMR includes N NZP CSI-RS resources, where N is a positive integer greater than 1.

[0048] In some embodiments, the first information may be referred to as indication information, first indication information, configuration information, resource configuration information, etc. The present disclosure does not limit the name of the first information.

[0049] In some embodiments, a terminal may receive first information sent by a network device, wherein the first information configures N NZP CSI-RS resources included in a CMR, and the terminal determines, based on the first information, the N NZP CSI-RS resources included in the CMR configured by the network device.

[0050] In some embodiments, the terminal is configured with a PDSCH CJT mode. The CJT mode may include: a CMR configured by the network device includes N NZP CSI-RS resources, where N is a positive integer greater than 1, and one NZP CSI-RS resource corresponds to one TRP or one TRP group.

[0051] It is clear that if N is greater than 1, it means that a CMR includes multiple NZP CSI-RS resources. In other words, a CMR corresponds to multiple TRPs or multiple TRP groups. In this case, CJT uses M-TRP communication.

[0052] Of course, in some other embodiments, the CJT approach may include: at least one CMR among the multiple CMRs configured by the network device includes N NZP CSI-RS resources.

[0053] For example, N can usually be 1, 2, 3, or 4. That is, a CMR usually includes 1-4 NZP CSI-RS resources.

[0054] For example, when N is greater than 1, the network device is configured with corresponding restrictions. For example, the network device is configured to indicate 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 the N NZP CSI-RS resources. The network device will use the TRP corresponding to the N NZP CSI-RS resources to send the PDSCH and / or DMRS corresponding to the PDSCH to the terminal. The terminal only needs to provide CSI feedback for the N NZP CSI-RS resources.

[0055] For another example, when N is greater than 1, the network device has no configuration restrictions. 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 can be understood that Q is a positive integer, and Q is less than or equal to N. The terminal can send information to the network device to indicate which Q NZP CSI-RS resources the terminal has selected, so as to inform the network device of the NZP CSI-RS resources selected by the terminal. The network device can send PDSCH and / or DMRS corresponding to PDSCH to the terminal based on the TRP corresponding to the Q NZP CSI-RS resources. The terminal only needs to provide CSI feedback for the Q NZP CSI-RS resources.

[0056] It can be understood that when a CMR configured by the network device includes N NZP CSI-RS resources, it can be considered that the terminal adopts the CJT method.

[0057] In some embodiments, the CJT approach may include independently feeding back a spatial basis vector vector for each NZP CSI-RS resource.

[0058] For example, the terminal independently feeds back a spatial basis vector for each NZP CSI-RS resource. That is, the terminal selects a specified number, H, of 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.

[0059] It can be understood that when the terminal independently feeds back the spatial basis vector for each NZP CSI-RS resource, it can be considered that the terminal adopts the CJT method.

[0060] In some embodiments, the CJT approach may include independently feeding back a frequency domain basis vector for each NZP CSI-RS resource.

[0061] 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.

[0062] It can be understood that when the terminal independently feeds back the frequency domain basis vector for each NZP CSI-RS resource, it can be considered that the terminal adopts the CJT method.

[0063] In some embodiments, the CJT approach may include: feeding back the same frequency domain basis vector for each NZP CSI-RS resource.

[0064] For example, the terminal selects the same v frequency domain basis vectors from N3 frequency domain basis vectors for each NZP CSI-RS resource.

[0065] It can be understood that when the terminal feeds back the same frequency domain basis vector for each NZP CSI-RS resource, it can be considered that the terminal adopts the CJT method.

[0066] In some embodiments, the CJT method may include: the network device configures multiple TRPs or multiple TRP groups. It can be understood that each TRP or each TRP group corresponds to one NZP CSI-RS resource.

[0067] It can be understood that when a network device is configured with multiple TRPs or multiple TRP groups, it can be considered that the terminal adopts the CJT method.

[0068] In step S12, it is determined that the unified TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH are M sets of unified TCI states.

[0069] In some embodiments, the terminal may determine M sets of unified TCI states corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH, where M is a positive integer greater than 1 and less than or equal to N.

[0070] For example, the terminal may determine M sets of unified TCI states. The M sets of unified TCI states may be used by the terminal to receive PDSCH and / or DMRS corresponding to PDSCH sent by some or all of the N TRPs corresponding to N NZP CSI-RS resources.

[0071] For example, N NZP CSI-RS resources correspond to N TRPs. The network device may use some or all of the N TRPs to send PDSCH and / or DMRS corresponding to the PDSCH to the terminal. The terminal may determine M sets of unified TCI states. These M sets of unified TCI states can be used by the terminal to receive PDSCH and / or DMRS corresponding to the PDSCH sent by different TRPs.

[0072] In some embodiments, the M sets of unified TCI states are two sets of unified TCI states.

[0073] In step S13, the PDSCH and / or the DMRS corresponding to the PDSCH are received using M sets of unified TCI states.

[0074] In some embodiments, the terminal may use the M sets of unified TCI states determined in step S12 to receive the PDSCH and / or the DMRS corresponding to the PDSCH.

[0075] For example, the terminal uses the determined M sets of unified TCI states to receive the PDSCH and / or DMRS corresponding to the PDSCH sent by different TRPs. That is to say, the terminal uses one set of unified TCI states in the M sets of unified TCIs to receive the PDSCH and / or DMRS corresponding to the PDSCH sent by a certain TRP. The unified TCI states used by the terminal to receive the PDSCH and / or DMRS corresponding to the PDSCH sent by different TRPs may be the same or different.

[0076] It can be understood that the present disclosure configures a CMR to include multiple NZP CSI-RS resources, and configures the terminal to use multiple sets of unified TCI states to receive PDSCH and / or DMRS corresponding to PDSCH sent by different TRPs, thereby avoiding the situation where a CMR is only configured with one NZP CSI-RS resource but multiple sets of unified TCI states are determined.

[0077] The present disclosure provides for improving downlink communication performance by configuring a plurality of NZP CSI-RS resources included in a CMR and determining to adopt multiple sets of unified TCI states to receive downlink channels or reference signals.

[0078] In the downlink communication method provided in the embodiment of the present disclosure, FIG3 is a flow chart of another downlink communication method according to an exemplary embodiment. As shown in FIG3, the method further includes the following steps:

[0079] In step S21, second information is received.

[0080] In some embodiments, the terminal may further receive second information. The second information is used to determine K sets of unified TCI states. The M sets of unified TCI states may be a subset of the K sets of unified TCI states, where K is a positive integer greater than 1.

[0081] For example, the terminal receives second information sent by the network device. The second information indicates K sets of unified TCI states. Based on the second information, the terminal determines the K sets of unified TCI states configured by the network device.

[0082] For example, the terminal directly determines M sets of unified TCI states based on the second information, that is, the K sets of unified TCI states determined by the second information are equal to the M sets of unified TCI states. In other words, K can be equal to M.

[0083] For another example, M sets of unified TCI states are a proper subset of K sets of unified TCI states. That is, the terminal determines K sets of unified TCI states based on the second information. These K sets of unified TCI states are greater than the M sets of unified TCI states. The terminal determines M sets of unified TCI states from the K sets of unified TCI states. In other words, K is greater than M.

[0084] In some embodiments, the K sets of unified TCI states determined by the second information are two sets of unified TCI states, that is, K is equal to 2.

[0085] The present disclosure can instruct a network device to use multiple sets of unified TCI states to receive downlink channels or reference signals, so as to improve downlink communication performance when a CMR is configured with multiple NZP CSI-RS resources.

[0086] In the downlink communication method provided by the embodiment of the present disclosure, the second information is used to indicate K sets of unified TCI states.

[0087] In some embodiments, the second information may indicate K sets of unified TCI states.

[0088] For example, one second information may directly indicate K sets of unified TCI states. Based on the received one second information, the terminal may directly determine the K sets of unified TCI states.

[0089] For example, the terminal may determine, based on the second information received most recently, the K sets of unified TCI states indicated by the second information received most recently.

[0090] For example, assuming that the K sets of unified TCI states indicated by the second information are two sets of unified TCI states, the terminal may determine the two sets of unified TCI states indicated by the most recently received second information based on the most recently received second information.

[0091] The present disclosure can directly indicate multiple sets of unified TCI states through a second information, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0092] In the downlink communication method provided by the embodiment of the present disclosure, FIG4 is a flow chart of another downlink communication method according to an exemplary embodiment. As shown in FIG4, receiving the second information may further include the following steps:

[0093] In step S31 , L second information are received.

[0094] In some embodiments, the terminal may receive multiple pieces of second information, such as 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 unified TCI states, and the Lth piece of second information is used to indicate one unified TCI state.

[0095] For example, the terminal receives L pieces of second information. The Lth piece of second information is used to indicate a unified TCI state. The first L-1 pieces of second information may respectively indicate one or more sets of unified TCI states.

[0096] For example, the L second information are 3 second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a set of unified TCI states, namely, unified TCI state 1; second information 2 can indicate a set of unified TCI states, namely, unified TCI state 2; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2. Alternatively, second information 1 can indicate a 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; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2. Alternatively, second information 1 can indicate two sets of unified TCI states, namely, unified TCI state 1 and unified TCI state 2; second information 2 can indicate two sets of unified TCI states, namely, unified TCI state 3 and unified TCI state 4; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2.

[0097] In some embodiments, the method further comprises the following steps:

[0098] In step S32, the unified TCI state indicated by the Lth second information is used to update one or more sets of unified TCI states indicated by the first L-1 second information to obtain K sets of unified TCI states.

[0099] In some embodiments, the terminal may use the unified TCI state indicated by the Lth second information to update one or more sets of unified TCI states indicated by the first L-1 second information to obtain K sets of unified TCI states.

[0100] For example, the L second information are three second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a set of unified TCI states, namely, unified TCI state 1; second information 2 can indicate a set of unified TCI states, namely, unified TCI state 2; and second information 3 can indicate a 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 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 second information. The updated K sets of unified TCI states are obtained, namely, unified TCI state 1 and new unified TCI state 2.

[0101] For another example, the L second information are 3 second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a 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 a 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 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 by the first two second information. The updated K sets of unified TCI states are obtained, namely, unified TCI state 1, new unified TCI state 2, and unified TCI state 3.

[0102] For another example, the L second information are three second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a unified TCI state, namely, unified TCI state 1; second information 2 can indicate two unified TCI states, namely, unified TCI state 2 and unified TCI state 3; and second information 3 can indicate a unified TCI state, namely, unified TCI state 4. In this case, the terminal can determine that the unified TCI states indicated by the first two second information are unified TCI state 1, unified TCI state 2, and unified TCI state 3. The terminal uses the unified TCI state 4 indicated by second information 3 to update the unified TCI state determined by the first two second information. This results in K updated sets of unified TCI states, namely, unified TCI state 1, unified TCI state 2, unified TCI state 3, and unified TCI state 4.

[0103] It can be understood that in the above example, when the Lth second information indicates only one unified TCI state, the terminal uses the unified TCI state indicated by the Lth second information to update the unified TCI state corresponding to the unified TCI state indicated by the Lth second information, among the one or more sets of unified TCI states determined by the first L-1 second information. The remaining unified TCI states may remain unchanged.

[0104] The present disclosure may indicate multiple sets of unified TCI states through multiple second information, so that when a number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0105] In the downlink communication method provided by an embodiment of the present 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 the TCI status indication field carried in the downlink control information (DCI).

[0106] In some embodiments, the second information is carried by a first MAC CE. The first MAC CE may indicate at least one unified TCI state. The at least one unified TCI state indicated by the MAC CE may correspond to a code point in a TCI state indication field carried in the DCI.

[0107] The present disclosure provides a possible implementation of the second information, so that when the number of NZP CSI-RS resources included in a CMR is configured as multiple, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0108] In the downlink communication method provided by the embodiment of the present disclosure, the second information is carried by the second MAC CE and the 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 status indication field carried in the DCI. The TCI status indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0109] In some embodiments, the second information is carried via a second MAC CE and DCI. The second MAC CE may indicate at least one unified TCI state corresponding to each of a plurality of code points. The plurality of code points may be multiple code points that may exist in a TCI state indication field carried in the DCI. The TCI state indication field carried in the DCI may indicate one of the plurality of code points, thereby indicating at least one unified TCI state corresponding to the code point.

[0110] The present disclosure provides a possible implementation of the second information, so that when a plurality of NZP CSI-RS resources are configured in a CMR, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0111] In the downlink communication method provided in the embodiment of the present disclosure, FIG5 is a flow chart of another downlink communication method according to an exemplary embodiment. As shown in FIG5 , the method may further include the following steps:

[0112] In step S41, M sets of unified TCI states are determined based on RRC configuration or default rules.

[0113] In some embodiments, the terminal may determine M sets of unified TCI states based on RRC configuration or default rules.

[0114] For example, when 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 can determine M sets of unified TCI states based on the RRC configuration or default rules.

[0115] For example, the terminal may pre-receive RRC signaling sent by a network device. The RRC signaling configures the terminal to receive PDSCH and / or DMRS corresponding to the PDSCH based on M sets of unified TCI states. The M sets of unified TCI states configured by the RRC signaling are M sets of unified TCI states among the K sets of unified TCI states determined by the second 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 M sets of unified TCI states based on the RRC signaling.

[0116] For another example, a default rule may predefine that the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH based on M sets of unified TCI states. The M sets of unified TCI states predefined by the default rule are M sets of unified TCI states among the K sets of unified TCI states determined by the second 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, it may determine the M sets of unified TCI states based on the default rule.

[0117] The present disclosure can determine multiple sets of unified TCI states through RRC configuration or default rules, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0118] In the downlink communication method provided by the embodiment of the present disclosure, the DMRS corresponding to the PDSCH and / or PDSCH is at least one of the following DMRS corresponding to the PDSCH and / or PDSCH: the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on DCI (format) 1_0; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the first DCI, wherein the TCI state selection field in the first DCI is configured to not appear, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the second DCI, wherein the time interval between the second DCI and the DMRS corresponding to the PDSCH and / or PDSCH is less than the 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.

[0119] In some embodiments, the PDSCH and / or the DMRS corresponding to the PDSCH may be: the PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on DCI format 1_0. In other words, the PDSCH is the PDSCH scheduled using DCI format 1_0; and / or the DMRS corresponding to the PDSCH is the DMRS corresponding to the PDSCH scheduled using DCI format 1_0.

[0120] For example, the network device configures the PDSCH and / or DMRS corresponding to the 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 DMRS corresponding to the PDSCH and / or PDSCH. In other words, this type of DCI cannot indicate the TCI state corresponding to the DMRS corresponding to the PDSCH and / or PDSCH. Therefore, the terminal cannot determine M sets of unified TCI states based on DCI format 1_0. The terminal can determine M sets of unified TCI states based on RRC configuration or default rules.

[0121] In some embodiments, when the PDSCH is scheduled using DCI format 1_0 and / or the DMRS corresponding to the PDSCH is the DMRS corresponding to the PDSCH scheduled using DCI format 1_0, the terminal may support the use of a default beam to receive the PDSCH and / or the DMRS corresponding to the PDSCH. The terminal may determine M sets of unified TCI states based on RRC configuration or default rules.

[0122] In some embodiments, for PDSCH and / or DMRS corresponding to the PDSCH scheduled by DCI format 1_0, the terminal may determine, based on the RRC configuration, which one or more unified TCI states to use for receiving the PDSCH and / or DMRS corresponding to the PDSCH. Of course, in some cases, if the RRC does not indicate a unified TCI state, the terminal may directly use the first set of unified TCI states. The first set of unified TCI states may be one of the M sets of unified TCI states.

[0123] For example, a certain set of unified TCI states is pre-configured as a first set of unified TCI states. If the RRC does not indicate a unified TCI state, the terminal directly uses the first set of unified TCI states to receive the PDSCH and / or the DMRS corresponding to the PDSCH.

[0124] 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 the first DCI. In other words, the PDSCH is a PDSCH scheduled by the first DCI; and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to the PDSCH scheduled by the first DCI. The TCI state selection field in the first DCI is configured to not appear, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2.

[0125] For example, the network device configures the PDSCH and / or DMRS corresponding to the PDSCH scheduled based on DCI format 1_1 or DCI format 1_2. The TCI state selection field in DCI format 1_1 or DCI format 1_2 is configured to not appear. That is, such DCI format 1_1 or DCI format 1_2 may be configured to include or not include the TCI state selection field. In the case where the TCI state selection field is configured to not appear, such DCI format 1_1 or DCI format 1_2 may not include the TCI state selection field.

[0126] The TCI state selection field may be used to indicate which one or more unified TCI states, among the K unified TCI states determined based on the second information, to use when the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH. For example, the TCI state indication field may indicate one or more unified TCI states, among the K unified TCI states determined by the second information, for use by the terminal in receiving the PDSCH and / or the DMRS corresponding to the PDSCH.

[0127] It is understood that in this case, since the TCI state selection field in the first DCI is configured not to appear, the terminal cannot determine the M sets of unified TCI states based on the first DCI. The terminal can determine the M sets of unified TCI states based on RRC configuration or default rules.

[0128] In some embodiments, for DCI format 1_1 or DCI format 1_2, assuming that the network device is not configured with such DCI to indicate which one or more unified TCI states to use when the terminal receives PDSCH and / or DMRS corresponding to the PDSCH, and assuming that the terminal supports multiple default beams, the terminal can directly use the default beam to receive PDSCH and / or DMRS corresponding to the PDSCH.

[0129] In some embodiments, when the PDSCH is a PDSCH scheduled by a first DCI, and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to the PDSCH scheduled by the 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 configured to not appear, the terminal may support the use of a default beam to receive the PDSCH and / or the DMRS corresponding to the PDSCH. The terminal may determine M sets of unified TCI states based on RRC configuration or default rules.

[0130] 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 the second DCI. In other words, the PDSCH is a PDSCH scheduled by the second DCI; and / or the DMRS corresponding to the PDSCH is a DMRS corresponding to the PDSCH scheduled by the second DCI. 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.

[0131] For example, a network device configures a PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on DCI format 1_0, DCI format 1_1, or DCI format 1_2. The TCI state selection field in DCI format 1_1 or DCI format 1_2 may be configured to be present. That is, such DCI format 1_1 or DCI format 1_2 may be configured to include or exclude the TCI state selection field. If the TCI state selection field is configured to be present, such 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 less 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 less than a preset time interval. The preset time interval may be the time required for the terminal to decode the second DCI; and / or the preset time interval may be the time it takes for the terminal to prepare a unified TCI state. The unified TCI state involved in the time it takes 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 before receiving the PDSCH and / or the DMRS corresponding to the PDSCH, the terminal cannot properly decode the second DCI and / or prepare the corresponding unified TCI state. Consequently, the terminal cannot obtain the M sets of unified TCI states indicated by the DCI. Therefore, the terminal can determine the M sets of unified TCI states based on RRC configuration or default rules.

[0132] It is understandable that, since the terminal cannot complete decoding of the second DCI and / or cannot prepare the corresponding unified TCI state in this case, the second DCI may include a TCI state selection field indicating M sets of unified TCI states, or may not include the TCI state selection field. In other words, the second DCI may be DCI format 1_0, DCI format 1_1, or DCI format 1_2.

[0133] In some embodiments, if the terminal cannot normally decode the second DCI and / or cannot prepare the corresponding unified TCI state before receiving the PDSCH and / or the DMRS corresponding to the PDSCH, the terminal may support using a default beam to receive the PDSCH and / or the DMRS corresponding to the PDSCH. The terminal may determine M sets of unified TCI states based on RRC configuration or default rules.

[0134] The present disclosure is applicable to determining multiple sets of unified TCI states through RRC configuration or default rules in various situations, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0135] In the downlink communication method provided by the embodiment of the present disclosure, the terminal expects to receive third information, where the third information is used to instruct the terminal not to select N NZP CSI-RS resources.

[0136] In some embodiments, the terminal expects to receive third information sent by the network device, wherein the third information may be used to instruct the terminal not to select N NZP CSI-RS resources.

[0137] For example, the third information may be the same as the first information. That is, the first information received by the terminal may indicate the N NZP CSI-RS resources included in a CMR and also indicate that the terminal does not need to select from the N NZP CSI-RS resources.

[0138] For example, a terminal may wish for the network device to instruct the terminal not to select from N NZP CSI-RS resources. In this way, the terminal can perform downlink communications based on N NZP CSI-RS resources. Since one NZP CSI-RS resource corresponds to one TRP or one group of TRPs, the terminal can use M sets of unified TCI states to receive PDSCHs transmitted by N TRPs or N groups of TRPs, and / or receive DMRS corresponding to PDSCHs transmitted by N TRPs or N groups of TRPs.

[0139] For example, the terminal can perform CSI measurement and CSI feedback based on N TRPs or N groups of TRPs.

[0140] It can be understood that in this embodiment, the terminal expects the network device to impose a restriction, that is, the terminal expects the network device to restrict the terminal from performing NZP CSI-RS resource selection.

[0141] The terminal disclosed in the present invention expects that the network device does not instruct the terminal to select the NZP CSI-RS resources included in a CMR, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0142] In the downlink communication method provided in an embodiment of the present disclosure, if the terminal does not receive the third information indicating that the N NZP CSI-RS resources are not to be selected, the method may further include: selecting Q NZP CSI-RS resources from the N NZP CSI-RS resources, where Q is a positive integer greater than 1 and less than or equal to N.

[0143] In some embodiments, if the terminal does not receive the third information, it means that the network device does not instruct the terminal not to select the N NZP CSI-RS resources. In this case, the terminal can select the N NZP CSI-RS resources.

[0144] For example, the terminal selects Q NZP CSI-RS resources from N NZP CSI-RS resources, where Q is less than or equal to N and is a positive integer greater than 1.

[0145] If the network device does not instruct the terminal not to select N NZP CSI-RS resources, it means that the terminal can select N NZP CSI-RS resources. Therefore, when selecting N NZP CSI-RS resources, the terminal needs to select more than one NZP CSI-RS resource, that is, the terminal needs to select multiple NZP CSI-RS resources from the N NZP CSI-RS resources. For example, the terminal selects Q NZP CSI-RS resources from N NZP CSI-RS resources.

[0146] In some embodiments, the terminal may report the selected Q NZP CSI-RS resources to the network device. For example, the terminal sends information indicating the selected Q NZP CSI-RS resources to the network device so that the network device knows which Q NZP CSI-RS resources the terminal has selected. The network device may perform downlink communication with the terminal based on the Q NZP CSI-RS resources selected by the terminal, i.e., send PDSCH and / or DMRS corresponding to PDSCH. The terminal may receive PDSCH and / or DMRS corresponding to PDSCH based on the selected Q NZP CSI-RS resources. The terminal may also perform CSI measurement and CSI feedback based on the selected Q NZP CSI-RS resources.

[0147] It will be appreciated that in this embodiment, the network device does not impose any restrictions on the terminal, that is, the network device does not restrict the terminal from selecting NZP CSI-RS resources. The terminal can select Q NZP CSI-RS resources from N NZP CSI-RS resources, and ensure that Q is greater than 1. This avoids the situation where one NZP CSI-RS resource is selected but multiple sets of unified TCI states are configured.

[0148] When the network device does not instruct the terminal not to select the NZP CSI-RS resources included in a CMR, the terminal disclosed in the present invention selects multiple NZP CSI-RS resources from N NZP CSI-RS resources, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0149] In the downlink communication method provided by the embodiment of the present disclosure, the unified TCI state includes at least one of the following: a joint TCI state; at least one of an uplink TCI state and a downlink TCI state.

[0150] In some embodiments, the unified TCI state includes a joint TCI state.

[0151] The joint TCI state can be used for both downlink and uplink communications.

[0152] In some embodiments, the unified TCI state includes a downlink TCI state.

[0153] In some embodiments, the unified TCI state includes an uplink TCI state.

[0154] Of course, it should be understood that, in the case where the terminal receives the PDSCH and / or the DMRS corresponding to the PDSCH, the unified TCI state cannot only include the uplink TCI state.

[0155] In some embodiments, the unified TCI state includes a downlink TCI state and an uplink TCI state.

[0156] The present disclosure provides multiple unified TCI state representations, which improve downlink communication performance by configuring the number of NZP CSI-RS resources included in a CMR to be multiple, and determining the use of multiple sets of unified TCI states to receive downlink channels or reference signals.

[0157] Based on the same concept, the present disclosure also provides a downlink communication method performed by a network device.

[0158] FIG6 is a flow chart showing another downlink communication method according to an exemplary embodiment. As shown in FIG6 , the method may be executed by a network device, and the method may include the following steps:

[0159] In step S51, the first information is sent.

[0160] In some embodiments, a network device may send first information for configuring a CMR, wherein the CMR includes N NZP CSI-RS resources, where N is a positive integer greater than 1.

[0161] In some embodiments, the first information may be referred to as indication information, first indication information, configuration information, resource configuration information, etc. The present disclosure does not limit the name of the first information.

[0162] In some embodiments, the network device may send first information to the terminal. The first information configures N NZP CSI-RS resources included in a CMR, so that the terminal can determine the N NZP CSI-RS resources included in the CMR configured by the network device based on the first information.

[0163] In some embodiments, the terminal is configured with a PDSCH CJT method. For the specific CJT method, please refer to the description of the corresponding embodiment on the terminal side, and this disclosure will not repeat it here.

[0164] In step S52, the PDSCH and / or the DMRS corresponding to the PDSCH are sent using M sets of unified TCI states.

[0165] In some embodiments, the network device may use M sets of unified TCI states to send PDSCH and / or DMRS corresponding to the PDSCH to the terminal, where M is a positive integer greater than 1 and less than or equal to N.

[0166] For example, the network device uses M sets of unified TCI states to send PDSCH and / or DMRS corresponding to PDSCH to the terminal through different TRPs. Among them, the unified TCI states used when sending PDSCH and / or DMRS corresponding to PDSCH by different TRPs can be the same or different.

[0167] In some embodiments, N NZP CSI-RS resources correspond to N TRPs. The network device may use some or all of the N TRPs and use M sets of unified TCI states to send PDSCH and / or DMRS corresponding to the PDSCH to the terminal.

[0168] In some embodiments, the M sets of unified TCI states are two sets of unified TCI states.

[0169] It can be understood that the present disclosure configures a CMR to include multiple NZP CSI-RS resources, and configures the terminal to use multiple sets of unified TCI states to receive PDSCH and / or DMRS corresponding to PDSCH sent by different TRPs, thereby avoiding the situation where a CMR is only configured with one NZP CSI-RS resource but multiple sets of unified TCI states are determined.

[0170] The present disclosure provides for improving downlink communication performance by configuring a plurality of NZP CSI-RS resources included in a CMR and determining to adopt multiple sets of unified TCI states to receive downlink channels or reference signals.

[0171] In the downlink communication method provided in the embodiment of the present disclosure, FIG7 is a flow chart of another downlink communication method according to an exemplary embodiment. As shown in FIG7, the method further includes the following steps:

[0172] In step S61, the second information is sent.

[0173] In some embodiments, the network device may further send second information. The second information is used to determine K sets of unified TCI states. The M sets of unified TCI states may be a subset of the K sets of unified TCI states, where K is a positive integer greater than 1.

[0174] For example, the network device sends second information to the terminal. The second information indicates K sets of unified TCI states, so that the terminal can determine the K sets of unified TCI states configured by the network device based on the second information.

[0175] For example, the second information directly indicates M sets of unified TCI states, that is, the K sets of unified TCI states determined by the second information are equal to the M sets of unified TCI states. In other words, K can be equal to M.

[0176] For another example, M sets of unified TCI states are a proper subset of K sets of unified TCI states, that is, the second information is used to determine K sets of unified TCI states. The K sets of unified TCI states are greater than M sets of unified TCI states. In other words, K is greater than M.

[0177] In some embodiments, the K sets of unified TCI states determined by the second information are two sets of unified TCI states, that is, K is equal to 2.

[0178] The present disclosure can instruct a network device to use multiple sets of unified TCI states to receive downlink channels or reference signals, so as to improve downlink communication performance when a CMR is configured with multiple NZP CSI-RS resources.

[0179] In the downlink communication method provided by the embodiment of the present disclosure, the second information is used to indicate K sets of unified TCI states.

[0180] It can be understood that regarding the embodiment in which the second information indicates K sets of unified TCI states, reference can be made to the description of the corresponding embodiment on the terminal side and its associated embodiments, and this disclosure will not go into details here.

[0181] The present disclosure can directly indicate multiple sets of unified TCI states through a second information, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0182] In the downlink communication method provided by the embodiment of the present disclosure, sending the second information may further include: sending L pieces of second information.

[0183] In some embodiments, the network device may send multiple pieces of second information, such as 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 unified TCI states, and the Lth piece of second information is used to indicate one unified TCI state.

[0184] For example, the network device sends L second information. The Lth second information is used to indicate a unified TCI state. The first L-1 second information can respectively indicate one or more unified TCI states.

[0185] For example, the L second information are 3 second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a set of unified TCI states, namely, unified TCI state 1; second information 2 can indicate a set of unified TCI states, namely, unified TCI state 2; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2. Alternatively, second information 1 can indicate a 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; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2. Alternatively, second information 1 can indicate two sets of unified TCI states, namely, unified TCI state 1 and unified TCI state 2; second information 2 can indicate two sets of unified TCI states, namely, unified TCI state 3 and unified TCI state 4; second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2.

[0186] In some embodiments, the unified TCI state indicated by the Lth second information may be used to update one or more sets of unified TCI states indicated by the first L-1 second information, to obtain K sets of unified TCI states.

[0187] For example, the L second information are three pieces of second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a set of unified TCI states, namely, unified TCI state 1; second information 2 can indicate a set of unified TCI states, namely, unified TCI state 2; and second information 3 can indicate a set of unified TCI states, namely, new unified TCI state 2. In this case, the unified TCI states indicated by the first two pieces of second information can be determined to be unified TCI state 1 and unified TCI state 2. The new unified TCI state 2 indicated by second information 3 is used to update the unified TCI state 2 determined by the first two pieces of second information. This results in K sets of updated unified TCI states, namely, unified TCI state 1 and new unified TCI state 2.

[0188] For another example, the L second information are 3 second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a 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 a set of unified TCI states, namely, new unified TCI state 2. In this case, the unified TCI states indicated by the first two second information can be determined to be unified TCI state 1, unified TCI state 2, and unified TCI state 3. The new unified TCI state 2 indicated by the second information 3 is used to update the unified TCI state 2 determined by the first two second information. The updated K sets of unified TCI states are obtained, namely, unified TCI state 1, new unified TCI state 2, and unified TCI state 3.

[0189] For another example, the L second information are three second information, namely, second information 1, second information 2, and second information 3. Among them, second information 1 can indicate a 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 a set of unified TCI states, namely, unified TCI state 4. In this case, the unified TCI states indicated by the first two second information can be determined to be unified TCI state 1, unified TCI state 2, and unified TCI state 3. Using the unified TCI state 4 indicated by second information 3, the unified TCI state determined by the first two second information is updated. The updated K sets of unified TCI states are obtained, namely, unified TCI state 1, unified TCI state 2, unified TCI state 3, and unified TCI state 4.

[0190] It can be understood that in the above example, when the Lth second information indicates only one set of unified TCI states, the unified TCI state indicated by the Lth second information is used to update the unified TCI state corresponding to the unified TCI state indicated by the Lth second information, among the one or more sets of unified TCI states determined by the first L-1 pieces of second information. The remaining unified TCI states can remain unchanged.

[0191] The present disclosure can indicate multiple sets of unified TCI states through multiple second information, so that when the number of NNZP CSI-RS resources included in a CMR is multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving the communication performance of the downlink.

[0192] In the downlink communication method provided by the embodiment of the present disclosure, the second information is carried by the first MAC CE, and at least one set of unified TCI states indicated by the first MAC CE corresponds to a code point in the TCI state indication field carried in the DCI.

[0193] It can be understood that regarding the embodiment in which the second information is carried by the first MAC CE, reference can be made to the description corresponding to the corresponding embodiment on the terminal side and its associated embodiments, and this disclosure will not go into details here.

[0194] The present disclosure provides a possible implementation of the second information, so that when the number of NZP CSI-RS resources included in a CMR is configured as multiple, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0195] In the downlink communication method provided by the embodiment of the present disclosure, the second information is carried by the second MAC CE and the 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 status indication field carried in the DCI. The TCI status indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0196] It can be understood that regarding the embodiment in which the second information is carried by the second MAC CE and DCI, reference can be made to the description corresponding to the corresponding embodiment on the terminal side and its associated embodiments, and this disclosure will not go into details here.

[0197] The present disclosure provides a possible implementation of the second information, so that when a plurality of NZP CSI-RS resources are configured in a CMR, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0198] In the downlink communication method provided by the embodiment of the present disclosure, the method may also include: sending RRC signaling, where the RRC signaling is used to configure M sets of unified TCI states; or, determining M sets of unified TCI states based on default rules; wherein the first condition is used to indicate that the terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI.

[0199] In some embodiments, the network device may send RRC signaling, wherein the RRC signaling is used to configure M sets of unified TCI states. The first condition is used to indicate that the terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI.

[0200] For example, when 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 network device can send RRC signaling to the terminal to configure M sets of unified TCI states for the terminal through RRC signaling.

[0201] For example, the network device may pre-send RRC signaling to the terminal, which configures the terminal to receive PDSCH and / or DMRS corresponding to PDSCH based on M sets of unified TCI states. The M sets of unified TCI states configured by the RRC signaling are M sets of unified TCI states among the K sets of unified TCI states determined by the second information. If the terminal cannot determine the unified TCI state corresponding to the PDSCH and / or DMRS corresponding to the PDSCH based on the DCI, it can determine the M sets of unified TCI states based on the RRC signaling.

[0202] In some embodiments, the M sets of unified TCI states are determined based on default rules.

[0203] For example, a default rule may predefine that a terminal receives PDSCH and / or DMRS corresponding to the PDSCH based on M sets of unified TCI states. The M sets of unified TCI states predefine by the default rule are M sets of unified TCI states among the K sets of unified TCI states determined by the second information. The network device may determine the M sets of unified TCI states based on the default rule. In some cases, the network device may determine the second information based on the determined M sets of unified TCI states to indicate the M sets of unified TCI states to the terminal.

[0204] For example, if the first condition is met, the network device determines M sets of unified TCI states based on a default rule. The network device may determine RRC signaling based on the M sets of unified TCI states and send the RRC signaling to the terminal to configure the M sets of unified TCI states through RRC.

[0205] In another example, the network device determines M sets of unified TCI states based on a default rule. The network device may determine one or more second information based on the M sets of unified TCI states, so as to indicate the M sets of unified TCI states to the terminal through the one or more second information. Alternatively, the network device may indicate K sets of unified TCI states, including the M sets of unified TCI states, to the terminal through the one or more second information.

[0206] The present disclosure can determine multiple sets of unified TCI states through RRC configuration or default rules, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0207] In the downlink communication method provided by the embodiment of the present disclosure, the DMRS corresponding to the PDSCH and / or PDSCH is at least one of the following DMRS corresponding to the PDSCH and / or PDSCH: the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on DCI format 1_0; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the first DCI, wherein the TCI state selection field in the first DCI is configured to not appear, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the second DCI, wherein the time interval between the second DCI and the DMRS corresponding to the PDSCH and / or PDSCH is less than the 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.

[0208] It can be understood that regarding the embodiments of possible situations of the first condition, reference can be made to the description of the corresponding embodiments on the terminal side and their associated embodiments, and this disclosure will not go into details here.

[0209] The present disclosure is applicable to determining multiple sets of unified TCI states through RRC configuration or default rules in various situations, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0210] In the downlink communication method provided in the embodiment of the present disclosure, FIG8 is a flow chart of another downlink communication method according to an exemplary embodiment. As shown in FIG8 , the method may further include the following steps:

[0211] In step S71, the third information is sent.

[0212] In some embodiments, the network device sends third information to the terminal, wherein the third information may be used to instruct the terminal not to select N NZP CSI-RS resources.

[0213] For example, the third information may be the same as the first information. That is, the first information may indicate the N NZP CSI-RS resources included in a CMR and also indicate that the terminal does not need to select from the N NZP CSI-RS resources.

[0214] For example, the network device instructs the terminal not to select from N NZP CSI-RS resources. In this way, the terminal can perform downlink communication based on N NZP CSI-RS resources. Since one NZP CSI-RS resource corresponds to one TRP or one group of TRPs, the terminal can use M sets of unified TCI states to receive PDSCHs transmitted by N TRPs or N groups of TRPs, and / or receive DMRS corresponding to PDSCHs transmitted by N TRPs or N groups of TRPs.

[0215] For example, the terminal can perform CSI measurement and CSI feedback based on N TRPs or N groups of TRPs.

[0216] The terminal disclosed in the present invention expects that the network device does not instruct the terminal to select the NZP CSI-RS resources included in a CMR, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0217] In the downlink communication method provided by the embodiment of the present disclosure, the unified TCI state includes at least one of the following: a joint TCI state; at least one of an uplink TCI state and a downlink TCI state.

[0218] It can be understood that regarding the embodiments of unified TCI state configuration, reference can be made to the description of the corresponding embodiments on the terminal side and their associated embodiments, and this disclosure will not go into details here.

[0219] The present disclosure provides multiple unified TCI state representations, which improve downlink communication performance by configuring the number of NZP CSI-RS resources included in a CMR to be multiple, and determining the use of multiple sets of unified TCI states to receive downlink channels or reference signals.

[0220] It should be noted that those skilled in the art will appreciate that the various implementation methods / embodiments involved in the embodiments of the present disclosure can be used in conjunction with the aforementioned embodiments or can be used independently. Whether used alone or in conjunction with the aforementioned embodiments, the implementation principles are similar. In the implementation of the present disclosure, some embodiments are described in terms of implementation methods used together. Of course, those skilled in the art will appreciate that such examples are not limitations on the embodiments of the present disclosure.

[0221] Based on the same concept, the embodiments of the present disclosure also provide a downlink communication device and equipment.

[0222] It is understandable that the downlink communication apparatus and equipment provided by the embodiments of the present disclosure include hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of the various examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0223] FIG9 is a schematic diagram of a downlink communication device according to an exemplary embodiment. Referring to FIG9 , the device 200 includes: a receiving module 201 configured to receive first information used to configure a CMR, wherein the CMR includes N NZP CSI-RS resources, where N is a positive integer greater than 1; a processing module 202 configured to determine that the unified TCI states corresponding to the PDSCH and / or DMRS corresponding to the PDSCH are M sets of unified TCI states, where M is a positive integer greater than 1 and less than or equal to N; and receiving module 201 is further configured to receive the PDSCH and / or DMRS corresponding to the PDSCH using the M sets of unified TCI states.

[0224] The present disclosure provides for improving downlink communication performance by configuring a plurality of NZP CSI-RS resources included in a CMR and determining to adopt multiple sets of unified TCI states to receive downlink channels or reference signals.

[0225] In some embodiments, the receiving module 201 is further configured to: receive second information, where the second information is used to determine K sets of unified TCI states, where the M sets of unified TCI states are a subset of the K sets of unified TCI states, and K is a positive integer greater than 1.

[0226] The present disclosure can instruct a network device to use multiple sets of unified TCI states to receive downlink channels or reference signals, so as to improve downlink communication performance when a CMR is configured with multiple NZP CSI-RS resources.

[0227] In some implementations, the second information is used to indicate K sets of unified TCI states.

[0228] The present disclosure can directly indicate multiple sets of unified TCI states through a second information, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0229] In some embodiments, the receiving module 201 is further used to receive L second information, where L is a positive integer greater than 1, the first L-1 second information is used to indicate one or more sets of unified TCI states, and the Lth second information is used to indicate one set of unified TCI states; the processing module 202 is further used to use the unified TCI state indicated by the Lth second information to update the one or more sets of unified TCI states indicated by the first L-1 second information to obtain K sets of unified TCI states.

[0230] The present disclosure may indicate multiple sets of unified TCI states through multiple second information, so that when a number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0231] In some implementations, the second information is carried by a first media access control element MAC CE, and the at least one set of unified TCI states indicated by the first MAC CE corresponds to a code point in a TCI state indication field carried in downlink control information DCI.

[0232] The present disclosure provides a possible implementation of the second information, so that when the number of NZP CSI-RS resources included in a CMR is configured as multiple, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0233] In some embodiments, 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 status indication field carried in the DCI, and the TCI status indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0234] The present disclosure provides a possible implementation of the second information, so that when a plurality of NZP CSI-RS resources are configured in a CMR, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0235] In some implementations, the processing module 202 is further configured to: determine M sets of unified TCI states based on radio resource control (RRC) configuration or default rules.

[0236] The present disclosure can determine multiple sets of unified TCI states through RRC configuration or default rules, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0237] In some embodiments, the DMRS corresponding to the PDSCH and / or PDSCH is at least one of the following DMRS corresponding to the PDSCH and / or PDSCH: the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on DCI format 1_0; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the first DCI, wherein the TCI state selection field in the first DCI is configured not to appear, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the second DCI, wherein the time interval between the second DCI and the DMRS corresponding to the PDSCH and / or PDSCH is less than the 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.

[0238] The present disclosure is applicable to determining multiple sets of unified TCI states through RRC configuration or default rules in various situations, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0239] In some implementations, the terminal expects to receive third information, where the third information is used to instruct the terminal not to select N NZP CSI-RS resources.

[0240] The terminal disclosed in the present invention expects that the network device does not instruct the terminal to select the NZP CSI-RS resources included in a CMR, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0241] In some embodiments, the terminal does not receive the third information, and the third information is used to indicate that the N NZP CSI-RS resources are not selected. The processing module 202 is further used to: select Q NZP CSI-RS resources from the N NZP CSI-RS resources, where Q is a positive integer greater than 1 and Q is less than or equal to N.

[0242] When the network device does not instruct the terminal not to select the NZP CSI-RS resources included in a CMR, the terminal disclosed in the present invention selects multiple NZP CSI-RS resources from N NZP CSI-RS resources, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0243] In some implementations, the unified TCI state includes at least one of the following: a joint TCI state; and at least one of an uplink TCI state and a downlink TCI state.

[0244] The present disclosure provides multiple unified TCI state representations, which improve downlink communication performance by configuring the number of NZP CSI-RS resources included in a CMR to be multiple, and determining the use of multiple sets of unified TCI states to receive downlink channels or reference signals.

[0245] 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, the first information being used to configure a CMR, where the CMR includes N NZP CSI-RS resources, where N is a positive integer greater than 1; and transmitting module 301, 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 less than or equal to N.

[0246] The present disclosure provides for improving downlink communication performance by configuring a plurality of NZP CSI-RS resources included in a CMR and determining to adopt multiple sets of unified TCI states to receive downlink channels or reference signals.

[0247] In some implementations, the sending module 301 is further used to: send second information, where the second information is used by the terminal to determine K sets of unified TCI states, where the M sets of unified TCI states are a subset of the K sets of unified TCI states, and K is a positive integer greater than 1.

[0248] The present disclosure can instruct a network device to use multiple sets of unified TCI states to receive downlink channels or reference signals, so as to improve downlink communication performance when a CMR is configured with multiple NZP CSI-RS resources.

[0249] In some implementations, the second information is used to indicate K sets of unified TCI states.

[0250] The present disclosure can directly indicate multiple sets of unified TCI states through a second information, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0251] In some embodiments, the sending module 301 is further used to: send L second information; wherein L is a positive integer greater than 1, the first L-1 second information is used to indicate one or more sets of unified TCI states, the Lth second information is used to indicate a set of unified TCI states, and the unified TCI state indicated by the Lth second information is also used to update the set or more sets of unified TCI states indicated by the first L-1 second information.

[0252] The present disclosure may indicate multiple sets of unified TCI states through multiple second information, so that when a number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0253] In some implementations, the second information is carried by a first media access control element MAC CE, and the at least one set of unified TCI states indicated by the first MAC CE corresponds to a code point in a TCI state indication field carried in downlink control information DCI.

[0254] The present disclosure provides a possible implementation of the second information, so that when the number of NZP CSI-RS resources included in a CMR is configured as multiple, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0255] In some embodiments, 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 status indication field carried in the DCI, and the TCI status indication field carried in the DCI is used to indicate one code point among the multiple code points.

[0256] The present disclosure provides a possible implementation of the second information, so that when a plurality of NZP CSI-RS resources are configured in a CMR, multiple sets of unified TCI states determined by the second information are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0257] In some embodiments, the device 300 also includes: a sending module 301 is also used to send radio resource control RRC signaling, and the RRC signaling is used to configure M sets of unified TCI states; or, a processing module 302 is used to determine M sets of unified TCI states based on default rules; wherein the first condition is used to indicate that the terminal cannot determine the unified TCI state corresponding to the PDSCH and / or the DMRS corresponding to the PDSCH based on the DCI.

[0258] The present disclosure can determine multiple sets of unified TCI states through RRC configuration or default rules, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0259] In some embodiments, the DMRS corresponding to the PDSCH and / or PDSCH is at least one of the following DMRS corresponding to the PDSCH and / or PDSCH: the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on DCI format 1_0; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the first DCI, wherein the TCI state selection field in the first DCI is configured not to appear, and the DCI format corresponding to the first DCI is DCI format 1_1 or DCI format 1_2; the DMRS corresponding to the PDSCH and / or PDSCH scheduled based on the second DCI, wherein the time interval between the second DCI and the DMRS corresponding to the PDSCH and / or PDSCH is less than the 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.

[0260] The present disclosure is applicable to determining multiple sets of unified TCI states through RRC configuration or default rules in various situations, so that when the number of NZP CSI-RS resources included in a CMR is configured to be multiple, the multiple sets of unified TCI states are used to receive downlink channels or reference signals, thereby improving downlink communication performance.

[0261] In some implementations, the sending module 301 is further configured to: send third information, where the third information is used to instruct the terminal not to select N NZP CSI-RS resources.

[0262] The terminal disclosed in the present invention expects that the network device does not instruct the terminal to select the NZP CSI-RS resources included in a CMR, so as to adopt multiple sets of unified TCI states to receive downlink channels or reference signals sent by different TRPs, thereby improving the communication performance of the downlink.

[0263] In some implementations, the unified TCI state includes at least one of the following: a joint TCI state; and at least one of an uplink TCI state and a downlink TCI state.

[0264] The present disclosure provides multiple unified TCI state representations, which improve downlink communication performance by configuring the number of NZP CSI-RS resources included in a CMR to be multiple, and determining the use of multiple sets of unified TCI states to receive downlink channels or reference signals.

[0265] It is understood that the apparatus 200 may further include a sending module configured to implement steps related to sending by the apparatus 200; and the apparatus 300 may further include a receiving module configured to implement steps related to receiving by the apparatus 300. Of course, the apparatus 200 and the apparatus 300 may further include more possible modules to implement corresponding functions, which are not limited in the present disclosure.

[0266] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0267] Figure 11 is a schematic diagram of a downlink communication device according to an exemplary embodiment. For example, device 400 can be any terminal such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0268] 11 , device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0269] Processing component 402 generally controls the overall operation of device 400, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the above-described method. In addition, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0270] The memory 404 is configured to store various types of data to support operations on the device 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0271] The power component 406 provides power to the various components of the device 400. The power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 400.

[0272] 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 can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera and / or a rear camera. When the device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0273] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) that is configured to receive external audio signals when the device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0274] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0275] The sensor assembly 414 includes one or more sensors for providing various aspects of the status assessment of the device 400. For example, the sensor assembly 414 can detect the open / closed state of the device 400, the relative positioning of components, such as the display and keypad of the device 400. The sensor assembly 414 can also detect changes in the position of the device 400 or a component of the device 400, the presence or absence of user contact with the device 400, the orientation or acceleration / deceleration of the device 400, and temperature changes of the device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0276] The communication component 416 is configured to facilitate wired or wireless communication between the device 400 and other devices. The device 400 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0277] In an exemplary embodiment, the device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described methods.

[0278] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by the processor 420 of the device 400 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0279] FIG12 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 FIG12 , device 500 includes a processing component 522, which further includes one or more processors, and memory resources represented by memory 532 for storing instructions executable by processing component 522, such as applications. The applications stored in memory 532 may include one or more modules, each corresponding to a set of instructions. Furthermore, processing component 522 is configured to execute the instructions to perform the above-described method.

[0280] The device 500 may also include a power supply component 526 configured to perform power management of the device 500, a wired or wireless network interface 550 configured to connect the device 500 to a network, and an input / output (I / O) interface 558. The device 500 may operate based on an operating system stored in the memory 532, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0281] The present disclosure proposes that when transmitting PDSCH CJT, when a CMR of CJT contains a configuration of multiple NZP CSI-RS resources and the default beam is two indicated TCI states, base station restrictions or UE behavior restrictions are given, thereby improving PDSCH-CJT transmission performance.

[0282] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0283] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0284] It is further understood that the meanings of words such as "in response to" and "if" involved in this disclosure depend on the context and the actual usage scenarios. For example, the word "in response to" used herein can be interpreted as "at..." or "when..." or "if" or "if".

[0285] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0286] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0287] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A downlink communication method, characterized in that: The method is executed by a terminal, and includes: Receive first information, where the first information is used to configure a channel measurement resource CMR, where the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, where N is a positive integer greater than 1; Determine that a unified transmission configuration indication TCI state corresponding to a physical downlink shared channel PDSCH and / or a demodulation reference signal DMRS corresponding to the PDSCH is M sets of unified TCI states, where M is a positive integer greater than 1, and M is less than or equal to N; The PDSCH and / or the DMRS corresponding to the PDSCH are received using the M sets of unified TCI states.

2. The method according to claim 1, characterized in that The method further comprises: Second information is received, where the second information is used to determine K sets of unified TCI states, where the M sets of unified TCI states are subsets of the K sets of unified TCI states, and K is a positive integer greater than 1.

3. The method according to claim 2, characterized in that The second information is used to indicate K sets of unified TCI states.

4. The method according to claim 2 or 3, characterized in that: The receiving of the second information comprises: receiving L pieces of the second information, where L is a positive integer greater than 1, the first L-1 pieces of the second information are used to indicate one or more sets of unified TCI states, and the Lth piece of the second information is used to indicate a set of unified TCI states; The method further comprises: Using the unified TCI state indicated by the Lth second information, one or more sets of unified TCI states indicated by the first L-1 second information are updated to obtain the K sets of unified TCI states.

5. The method according to any one of claims 2 to 4, characterized in that: The second information is carried by the first media access control unit 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 indication field carried in the downlink control information DCI.

6. The method according to any one of claims 2 to 4, characterized in that: 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 indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

7. The method according to claim 1, characterized in that The method further comprises: The M sets of unified TCI states are determined based on radio resource control RRC configuration or default rules.

8. The method according to claim 7, characterized in that The PDSCH and / or the DMRS corresponding to the PDSCH is at least one of the following PDSCH and / or DMRS corresponding to the PDSCH: The PDSCH scheduled based on DCI format format 1_0 and / or the DMRS corresponding to the PDSCH; The PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on a first DCI, wherein the TCI state selection field in the first DCI is configured not to appear, and the DCI format corresponding to the first DCI is DCI format 1-_1 or DCI format 1_2; The PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on a second DCI, wherein 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.

9. The method according to any one of claims 1 to 8, characterized in that: The terminal expects to receive third information, where the third information is used to instruct the terminal not to select the N NZP CSI-RS resources.

10. The method according to any one of claims 1 to 8, characterized in that: The terminal does not receive third information, where the third information is used to indicate that the N NZP CSI-RS resources are not selected, and the method further includes: Select Q NZP CSI-RS resources from the N NZP CSI-RS resources, where Q is a positive integer greater than 1, and the Q is less than or equal to the N.

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

12. A downlink communication method, characterized in that: The method is performed by a network device and includes: Sending first information, where the first information is used to configure a channel measurement resource CMR, wherein the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, where N is a positive integer greater than 1; The physical downlink shared channel PDSCH and / or the demodulation reference signal DMRS corresponding to the PDSCH are sent using M sets of unified transmission configuration indication TCI states, wherein M is a positive integer greater than 1 and is less than or equal to N.

13. The method according to claim 12, characterized in that The method further comprises: Sending second information, where the second information is used by the terminal to determine K sets of unified TCI states, where the M sets of unified TCI states are subsets of the K sets of unified TCI states, and K is a positive integer greater than 1.

14. The method according to claim 13, characterized in that The second information is used to indicate K sets of unified TCI states.

15. The method according to claim 13 or 14, characterized in that The sending of the second information comprises: Sending L pieces of the second information; Wherein, L is a positive integer greater than 1, and the first L-1 second information is used to indicate one or more sets of unified TCI states. The Lth second information is used to indicate a set of unified TCI states, and the unified TCI states indicated by the Lth second information are also used to update one or more sets of unified TCI states indicated by the first L-1 second information.

16. The method according to any one of claims 13 to 15, characterized in that: The second information is carried by the first media access control unit 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 indication field carried in the downlink control information DCI.

17. The method according to any one of claims 13 to 15, characterized in that: 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 indication field carried in the DCI, and the TCI state indication field carried in the DCI is used to indicate one of the multiple code points.

18. The method according to claim 12, characterized in that The method further comprises: Sending a radio resource control RRC signaling, where the RRC signaling is used to configure the M sets of unified TCI states; or, The M sets of unified TCI states are determined based on default rules.

19. The method according to claim 18, characterized in that The PDSCH and / or the DMRS corresponding to the PDSCH is at least one of the following PDSCH and / or DMRS corresponding to the PDSCH: The PDSCH scheduled based on DCI format format 1_0 and / or the DMRS corresponding to the PDSCH; The PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on a first DCI, wherein the TCI state selection field in the first DCI is configured not to appear, and the DCI format corresponding to the first DCI is DCI format 1-_1 or DCI format 1_2; The PDSCH and / or the DMRS corresponding to the PDSCH scheduled based on a second DCI, wherein 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.

20. The method according to any one of claims 12 to 19, characterized in that: The method further comprises: Send third information, where the third information is used to instruct the terminal not to select the N NZP CSI-RS resources.

21. The method according to any one of claims 12 to 20, characterized in that: The unified TCI status includes at least one of the following: Joint TCI status; At least one of an uplink TCI state and a downlink TCI state.

22. A downlink communication device, characterized in that: The device comprises: A receiving module, configured to receive first information, wherein the first information is used to configure a channel measurement resource CMR, wherein the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, wherein N is greater than 1 A positive integer of ; A processing module, used to determine that the 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 is M sets of unified TCI states, wherein M is a positive integer greater than 1, and M is less than or equal to N; The receiving module is also used to receive the PDSCH and / or the DMRS corresponding to the PDSCH using the M sets of unified TCI states.

23. A downlink communication device, characterized in that: The device comprises: A sending module, configured to send first information, where the first information is used to configure a channel measurement resource CMR, wherein the CMR includes N non-zero power channel state information reference signal NZP CSI-RS resources, where N is a positive integer greater than 1; The sending module is also used to send a physical downlink shared channel PDSCH and / or a demodulation reference signal DMRS corresponding to the PDSCH using M sets of unified transmission configuration indication TCI states, wherein M is a positive integer greater than 1 and M is less than or equal to N.

24. A downlink communication device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the method described in any one of claims 1 to 11.

25. A downlink communication device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the method described in any one of claims 12 to 21.

26. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method according to any one of claims 1 to 11.

27. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the method according to any one of claims 12 to 21.

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