Data transmitting method, information reporting method, device, and apparatus

Abstract

Embodiments of the present invention provide a data transmitting method, an information reporting method, a device and an apparatus. The data transmitting method comprises: a network device determining time difference information of downlink signals reaching a terminal, wherein the downlink signals are transmitted by a plurality of network nodes managed by the network device; and performing downlink data joint transmission to the terminal on the basis of the time difference information.

Description

Data sending method, information reporting method, equipment and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202310723981.1, filed on June 16, 2023, entitled “Data sending method, information reporting method, equipment and device”, which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to the field of wireless communication technology, and in particular to a data sending method, an information reporting method, a device, and an apparatus. Background Art

[0004] Downlink joint transmission (JT) in multi-point coordinated transmission supports the serving cell and the coordinated cell to select the same time-frequency resources to transmit the same data stream or different data streams according to a certain strategy.

[0005] Theoretically, the gain from transmitting the same data stream is higher than the gain from transmitting different data streams. However, most current scenarios only use solutions that transmit different data streams, which results in a loss of some gain and thus affects user throughput and system capacity.

[0006] Summary of the Invention

[0007] In order to solve the problems existing in the prior art, the embodiments of the present disclosure provide a data sending method, an information reporting method, a device and an apparatus.

[0008] In a first aspect, an embodiment of the present disclosure provides a data sending method, applied to a network device, comprising:

[0009] Determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal;

[0010] Based on the time difference information, downlink data is jointly sent to the terminal.

[0011] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0012] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0013] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0014] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0015] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0016] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0017] In some embodiments, determining the time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0018] receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or

[0019] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0020] In some embodiments, the receiving measurement information reported by the terminal includes:

[0021] The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

[0022] In some embodiments, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0023] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0024] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0025] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0026] receiving the measurement information reported by the terminal through a first event report of a first measurement event;

[0027] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0028] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0029] receiving the measurement information reported by the terminal through a second event report of a first measurement event;

[0030] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0031] In some embodiments, the method further comprises:

[0032] After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

[0033] In some embodiments, the method further comprises:

[0034] The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal;

[0035] The CU of the network device sends the data sending time window adjustment information to the master DU of the network device.

[0036] In some embodiments, the method further comprises:

[0037] After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or after the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the secondary DU of the network device.

[0038] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0039] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0040] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0041] In a second aspect, an embodiment of the present disclosure further provides an information reporting method, applied to a terminal, comprising:

[0042] Reporting measurement information to the network device, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0043] In some embodiments, reporting the measurement information to the network device includes:

[0044] The measurement information is reported to the network device via a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI.

[0045] In some embodiments, reporting the measurement information to the network device through a measurement event report includes:

[0046] reporting the measurement information to the network device through an event report of the first measurement event;

[0047] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0048] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0049] When a time difference between downlink signals sent by at least two of the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0050] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0051] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0052] When the time differences between the downlink signals sent by the multiple network nodes and the arrival of the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0053] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0054] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0055] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0056] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0057] In a third aspect, an embodiment of the present disclosure further provides a network device, including a memory, a transceiver, and a processor:

[0058] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0059] Determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal;

[0060] Based on the time difference information, downlink data is jointly sent to the terminal.

[0061] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0062] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0063] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0064] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0065] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0066] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0067] In some embodiments, determining the time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0068] receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or

[0069] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0070] In some embodiments, the receiving measurement information reported by the terminal includes:

[0071] The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

[0072] In some embodiments, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0073] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0074] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0075] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0076] receiving the measurement information reported by the terminal through a first event report of a first measurement event;

[0077] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0078] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0079] receiving the measurement information reported by the terminal through a second event report of a first measurement event;

[0080] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0081] In some embodiments, the operations further include:

[0082] After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

[0083] In some embodiments, the operations further include:

[0084] The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal;

[0085] The CU of the network device sends the data sending time window adjustment information to the master DU of the network device.

[0086] In some embodiments, the operations further include:

[0087] After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or after the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the secondary DU of the network device.

[0088] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0089] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0090] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0091] In a fourth aspect, an embodiment of the present disclosure further provides a terminal, including a memory, a transceiver, and a processor:

[0092] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0093] Reporting measurement information to the network device, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0094] In some embodiments, reporting the measurement information to the network device includes:

[0095] The measurement information is reported to the network device via a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI.

[0096] In some embodiments, reporting the measurement information to the network device through a measurement event report includes:

[0097] reporting the measurement information to the network device through an event report of the first measurement event;

[0098] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0099] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0100] When a time difference between downlink signals sent by at least two of the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0101] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0102] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0103] When the time differences between the downlink signals sent by the multiple network nodes and the arrival of the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0104] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0105] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0106] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0107] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0108] In a fifth aspect, an embodiment of the present disclosure further provides a data sending device, including:

[0109] A determination unit, configured to determine time difference information between downlink signals sent by a plurality of network nodes under the network device and reaching the terminal;

[0110] A joint sending unit is configured to jointly send downlink data to the terminal based on the time difference information.

[0111] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0112] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0113] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0114] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0115] In some embodiments, the jointly sending downlink data to the terminal based on the time difference information includes:

[0116] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0117] In some embodiments, determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0118] receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or

[0119] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0120] In some embodiments, the receiving measurement information reported by the terminal includes:

[0121] The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

[0122] In some embodiments, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0123] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0124] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0125] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0126] receiving the measurement information reported by the terminal through a first event report of a first measurement event;

[0127] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0128] In some embodiments, the receiving the measurement information reported by the terminal through an event report of the first measurement event includes:

[0129] receiving the measurement information reported by the terminal through a second event report of a first measurement event;

[0130] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0131] In some embodiments, the apparatus further includes a first sending unit configured to:

[0132] The CU of the network device sends the time difference information to the master data unit DU of the network device.

[0133] In some embodiments, the apparatus further includes a second sending unit configured to:

[0134] The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal;

[0135] The CU of the network device sends the data sending time window adjustment information to the master DU of the network device.

[0136] In some embodiments, the apparatus further includes a third sending unit, configured to:

[0137] The primary DU of the network device sends the data transmission time window adjustment information to the secondary DU of the network device.

[0138] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0139] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0140] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0141] In a sixth aspect, an embodiment of the present disclosure further provides an information reporting device, including:

[0142] The reporting unit is configured to report measurement information to the network device, wherein the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0143] In some embodiments, reporting the measurement information to the network device includes:

[0144] The measurement information is reported to the network device via a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI.

[0145] In some embodiments, reporting the measurement information to the network device through a measurement event report includes:

[0146] reporting the measurement information to the network device through an event report of the first measurement event;

[0147] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0148] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0149] When a time difference between downlink signals sent by at least two of the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0150] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0151] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0152] When the time differences between the downlink signals sent by the multiple network nodes and the arrival of the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0153] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0154] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0155] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0156] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0157] In the seventh aspect, an embodiment of the present disclosure also provides a computer-readable storage medium, which stores a computer program, and the computer program is used to enable a computer to execute the data sending method described in the first aspect above, or execute the information reporting method described in the second aspect above.

[0158] In an eighth aspect, an embodiment of the present disclosure further provides a communication device, in which a computer program is stored, and the computer program is used to enable the communication device to execute the data sending method described in the first aspect, or execute the information reporting method described in the second aspect.

[0159] In the ninth aspect, an embodiment of the present disclosure further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the data sending method described in the first aspect above, or execute the information reporting method described in the second aspect above.

[0160] In the tenth aspect, an embodiment of the present disclosure further provides a chip product, in which a computer program is stored, and the computer program is used to enable the chip product to execute the data sending method described in the first aspect above, or execute the information reporting method described in the second aspect above.

[0161] The data sending method, information reporting method, equipment and device provided in the embodiments of the present disclosure select different joint transmission methods or adjust the joint transmission process based on the time difference information of the downlink signals sent by multiple network nodes under the network device reaching the terminal, and then jointly send downlink data to the terminal. Therefore, a scheme with better gain can be selected for downlink data transmission in different scenarios, thereby improving user throughput and system capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0162] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0163] FIG1 is a schematic diagram of a user-centric access network architecture provided by related technologies;

[0164] FIG2 is a schematic diagram of a flow chart of a data sending method provided by an embodiment of the present disclosure;

[0165] FIG3 is a flow chart of an information reporting method according to an embodiment of the present disclosure;

[0166] FIG4 is a schematic diagram of a process of scheduling on the network side provided by an embodiment of the present disclosure;

[0167] FIG5 is a schematic diagram of adjusting the PDSCH transmission time window of the TRP governed by the secondary DU according to an embodiment of the present disclosure;

[0168] FIG6 is a schematic diagram of information interaction provided by an embodiment of the present disclosure;

[0169] FIG7 is a schematic diagram of the structure of a network device provided in an embodiment of the present disclosure;

[0170] FIG8 is a schematic structural diagram of a terminal provided in an embodiment of the present disclosure;

[0171] FIG9 is a schematic structural diagram of a data sending device provided in an embodiment of the present disclosure;

[0172] FIG10 is a schematic structural diagram of an information reporting device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0173] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0174] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0175] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0176] In order to facilitate a clearer understanding of the technical solutions of the various embodiments of the present disclosure, some technical contents related to the various embodiments of the present disclosure are first introduced.

[0177] 1. Downlink joint transmission

[0178] Multi-point coordinated transmission, including downlink joint transmission, supports the serving cell and the coordinated cell to select the same time-frequency resources to transmit the same data stream or different data streams according to a certain strategy.

[0179] When sending the same data stream, it is expected that the arrival time alignment of the Physical Downlink Shared Channel (PDSCH) sent by different Transmitting Receiving Points (TRP) received by the User Equipment (UE) meets certain requirements, so that the signals can be superimposed within the UE receiving window to obtain higher gain. Assuming that two TRPs use the same data stream for transmission, theoretically, a maximum gain of 6dB can be obtained. If different data streams are used for transmission, only a maximum gain of 3dB can be obtained, which means a loss of 3dB of coherent reception gain. However, sending the same data stream has strict requirements on the arrival time alignment of PDSCHs sent by different base stations or TRPs at the UE. Failure to meet these requirements will lead to inter-symbol interference (ISI), thereby reducing the gain or even causing negative gain.

[0180] 2. User-centric access network architecture

[0181] With the development of mobile communication networks, a user-centric access network architecture has emerged to meet the needs of real-time, high-bandwidth services in ultra-dense networking scenarios. By introducing flexible cells, multiple access points (APs) or multiple Transport Relay Protocols (TRPs) across network devices coordinate transmission and serve a single user end user (UE), thereby improving the user experience.

[0182] Figure 1 is a schematic diagram of a user-centric access network architecture provided by related technologies. As shown in Figure 1, the network-side control unit (CU) or data unit (DU) determines the organization of flexible cells, with TRP3, TRP4, and TRP8 serving UE1. TRP3, TRP4, and TRP8 are configured with some or all of the same access and transmission resources. Each part is described below:

[0183] (1) As the control plane anchor node, the CU has the functions of establishing, maintaining, and releasing Radio Resource Control (RRC) connections; establishing, configuring, maintaining, and releasing bearers; managing UE measurement reports, managing and distributing UE contexts; configuring candidate TRP sets; and selecting DUs.

[0184] (2) DU, as a data scheduling entity, has the functions of selecting a specific TRP to perform addressing, distribution, and scheduling transmission for users.

[0185] (3) The TRP is a data transceiver node that performs some physical layer functions, such as radio frequency and Fast Fourier Transformation (FFT). Depending on the actual device functionality, this node can be an access point (AP) device that carries more functions, or a base station with various simplified functional configurations.

[0186] (4) Flexible cell: An area consisting of one or more APs / TRPs with some or all of the same access and transmission parameters. The control plane unit (CU) flexibly enables and configures the AP / TRP candidate set for the terminal. This means that the coverage area is variable. The AP / TRPs of a flexible cell can be flexibly organized by the data plane unit (DU). For any terminal, the DU responsible for making scheduling decisions is called the primary DU, while the DU that only provides AP / TRP resources and does not make scheduling decisions is called the secondary DU.

[0187] FIG2 is a flow chart of a data transmission method provided by an embodiment of the present disclosure. As shown in FIG2 , the method is applied to a network device and includes the following steps:

[0188] Step 200: Determine time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0189] Step 201: jointly send downlink data to the terminal based on the time difference information.

[0190] Specifically, the network device in the embodiment of the present disclosure may be a base station, which has jurisdiction over multiple network nodes. The network device in the embodiment of the present disclosure may include a control unit and multiple data units connected to the control unit, each data unit having jurisdiction over multiple network nodes.

[0191] The control unit may also be interpreted as a centralized unit (Centralized Unit), and the data unit may also be interpreted as a distributed unit (Distributed Unit). The control unit and the data unit may be arranged geographically separately.

[0192] The network node may be a node having the function of sending information to a terminal and receiving information sent by the terminal. In some embodiments, the network node may include a TRP; or, the network node may include an AP; or, the network node may include a TRP and an AP.

[0193] Before performing a joint downlink transmission to a certain terminal, the network device may first determine the time difference information of downlink signals sent by multiple network nodes under its jurisdiction reaching the terminal.

[0194] In some embodiments, the downlink signal may include one or more of a synchronization signal block (SSB), a tracking reference signal (TRS), and a channel-state information reference signal (CSI-RS).

[0195] Time difference information can be any information used to indicate the time difference between downlink signals sent by multiple different network nodes under the network device and their arrival at the terminal. The embodiments of this disclosure do not limit the form of the time difference information. For example, the time difference information can include the time difference between downlink signals sent by any two of the multiple network nodes under the network device and their arrival at the terminal; or, the time difference information can include downlink reference signal time difference (DL RSTD) information of the multiple network nodes under the network device.

[0196] It is understood that due to the varying distances between different network nodes and a terminal, even when different network nodes simultaneously transmit downlink signals to the terminal, the terminal receives the downlink signals from these different network nodes at different times. Therefore, a network device can determine the time difference between the arrival of downlink signals from multiple network nodes under its jurisdiction at the terminal and then jointly transmit downlink data to the terminal based on this time difference.

[0197] The data sending method provided by the embodiment of the present disclosure selects different joint transmission modes or adjusts the joint transmission process based on the time difference information of the downlink signals sent by multiple network nodes under its jurisdiction reaching the terminal, and then jointly sends downlink data to the terminal. Therefore, a scheme with better gain can be selected for downlink data transmission in different scenarios, thereby improving user throughput and system capacity.

[0198] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0199] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly transmitted to the terminal using the same data stream joint transmission mode.

[0200] Specifically, the candidate network node of the terminal may be a network node selected by the network device that is more suitable for performing downlink data transmission for the terminal. The network device may determine the network node for joint downlink data transmission from the candidate network nodes of the terminal according to the time difference information.

[0201] When the time difference between the downlink signals sent by at least two network nodes among the candidate network nodes and arriving at the terminal is less than or equal to the first threshold, for example, the time difference between the downlink signals sent by at least two network nodes and arriving at the terminal is less than or equal to the first threshold, or the difference in DL RSTD corresponding to at least two network nodes is less than or equal to the first threshold, the network device can determine to use the same data stream joint transmission method to jointly send downlink data to the terminal.

[0202] It is understandable that the network nodes used to send the same data stream to the terminal can be at least two network nodes among the candidate network nodes that meet the condition that the time difference is less than or equal to the first threshold. For example, among the candidate TRPs, if the difference in the time when the downlink signals sent by any two TRPs among TRP1, TRP2, and TRP3 reach the terminal is less than or equal to the first threshold, any two TRPs among TRP1, TRP2, and TRP3 can be selected to send the same data stream to the terminal, or TRP1, TRP2, and TRP3 can be selected to send the same data stream to the terminal.

[0203] Selecting a network node that satisfies the time difference less than or equal to the first threshold condition to send the same data stream to the terminal can ensure that the time when the terminal receives the same data streams sent by multiple network nodes meets the alignment requirement, thereby achieving a higher gain when merging the same data streams.

[0204] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0205] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0206] Specifically, the candidate network node of the terminal may be a network node selected by the network device that is more suitable for performing downlink data transmission for the terminal. The network device may determine the network node for joint downlink data transmission from the candidate network nodes of the terminal according to the time difference information.

[0207] When the time difference between the downlink signals sent by the candidate network nodes and the arrival of the terminal is greater than the first threshold, for example, the time difference between the downlink signals sent by any two candidate network nodes and the arrival of the terminal is greater than the first threshold, or the difference in the DL RSTD corresponding to any two candidate network nodes is greater than the first threshold, the network device can determine to use different data stream joint transmission methods to jointly send downlink data to the terminal.

[0208] For example, the candidate TRPs are TRP1, TRP2 and TRP3, and the time difference between the downlink signals sent by any two TRPs and their arrival at the terminal is greater than the first threshold. Different data stream joint transmission methods can be used to jointly send downlink data to the terminal.

[0209] When the time difference between the downlink signals sent by the candidate network nodes and the arrival at the terminal is greater than the first threshold, the same data stream received by the terminal does not meet the alignment requirements, which may reduce the gain or even produce negative gain. Therefore, in this case, a different data stream joint transmission method is used to jointly send downlink data to the terminal. Compared with the same data stream joint transmission method, a more stable gain can be obtained.

[0210] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0211] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and the downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0212] Specifically, the candidate network node of the terminal can be a network node selected by the network device that is more suitable for downlink data transmission to the terminal. The network device can adjust the data sending time window of the candidate network node based on the time difference information, so that the adjusted candidate network node sends the same data stream to the terminal, and the time when the terminal receives the same data stream sent by each candidate network node meets the alignment requirements.

[0213] In the embodiment of the present disclosure, the network device does not limit the specific adjustment method of the data transmission time window of the candidate network node. For example, a reference network node can be selected to adjust the data transmission time window of other network nodes based on the time difference between other network nodes and the reference network node.

[0214] Based on the time difference information, the data transmission time window of each candidate network node is adjusted to ensure that the time when the terminal receives the same data stream sent by multiple network nodes meets the alignment requirement, thereby achieving a higher gain when merging the same data streams.

[0215] In some embodiments, determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0216] Receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or,

[0217] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0218] Specifically, in some implementations, the network device can receive measurement information reported by the terminal, which measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device arriving at the terminal, so that the network device can determine the time difference information of downlink signals sent by multiple network nodes under the network device arriving at the terminal.

[0219] In some embodiments, receiving measurement information reported by a terminal includes:

[0220] The receiving terminal reports measurement information through measurement event reports, media access control layer control elements (MAC CE), or uplink control information (UCI).

[0221] Specifically, the network device can pre-configure the terminal, and the terminal can measure the downlink signals sent by multiple network nodes under the network device according to the configuration of the network device, and report the time difference information of the downlink signals sent by multiple network nodes under the network device reaching the terminal to the network device.

[0222] The terminal may report the measurement information through a measurement event report; or, the terminal may report the measurement information through a Medium Access Control Control Element (MAC CE); or, the terminal may report the measurement information through uplink control information (UCI).

[0223] For example, as shown in Table 1, R is a reserved bit, and the Ci field represents the sequential identifier configured for the UE to perform TRP measurement, indicating whether DL RSTD reporting is triggered. If Ci is 1, the DL RSTD representing TRPi is reported. If Ci is 0, it indicates that the field of TRPi under the secondary DU does not exist or is not reported.

[0224] Table 1 Example of terminal reporting via MAC CE

[0225] In some implementations, multiple network nodes in the network device can receive uplink signals simultaneously sent by the terminal, such as a sounding reference signal (SRS) or a sounding reference signal for positioning purposes (SRS-Pos) or a demodulation reference signal (DMRS), and then measure and obtain time difference information of the uplink signal sent by the terminal reaching multiple network nodes under the network device. For example, the network device measures the uplink relative arrival time (UL RTOA) of multiple network nodes and calculates the time difference information.

[0226] In a scenario where the reciprocity of uplink and downlink channels is met, the network device can use the time difference information of the uplink signal sent by the terminal reaching multiple network nodes under the network device as the time difference information of the downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0227] Using the time difference information of the uplink signal sent by the terminal to reach multiple network nodes under the network device as the time difference information of the downlink signals sent by multiple network nodes under the network device to reach the terminal can simplify the process of the network device determining the time difference information of the uplink signal sent by the terminal to reach multiple network nodes under the network device, thereby reducing resource consumption.

[0228] In some embodiments, receiving measurement information reported by a terminal through a measurement event report includes:

[0229] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0230] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0231] Specifically, the network device may configure a first measurement event for the terminal, for example, by configuring the first measurement event for the terminal via an RRC message. The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes reaching the same terminal meets a time alignment requirement for jointly transmitting the same downlink data stream.

[0232] According to the first measurement event configured by the network device, the terminal measures the time difference of the downlink signals sent by multiple network nodes under the network device and obtains the time difference measurement result, determines whether the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream, and reports the measurement information to the network device through the corresponding event report.

[0233] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0234] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0235] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0236] Specifically, the network device may configure the terminal with a trigger condition that the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0237] For example, when the time difference between downlink signals sent by at least two network nodes among the multiple network nodes and arriving at the terminal is less than the second threshold, it is determined that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0238] When the terminal determines that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream, the measurement information can be reported through the first event report of the first measurement event, and the first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0239] The embodiment of the present disclosure does not limit the manner in which the first event report indicates that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream. For example, it can be indicated by setting or not setting a certain field, or carrying indication information.

[0240] After receiving the measurement information reported by the terminal through the first event report, the network device can determine to use the same data stream joint transmission mode to jointly send downlink data to the terminal according to the first event report, and then determine the network node for joint downlink data transmission according to the measurement information.

[0241] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0242] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0243] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0244] Specifically, the network device may configure the terminal with a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes reaching the same terminal does not meet a time alignment requirement for downlink joint transmission of the same data stream.

[0245] For example, when the time differences between downlink signals sent by multiple network nodes and arriving at the terminal are all greater than the third threshold, it is determined that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0246] When the terminal determines that the time difference measurement result does not meet the time alignment requirements for the downlink joint transmission of the same data stream, the measurement information can be reported through the second event report of the first measurement event, and the second event report is used to indicate that the time difference measurement result does not meet the time alignment requirements for the downlink joint transmission of the same data stream.

[0247] Among them, the embodiment of the present disclosure does not limit the way in which the second event report indicates that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream. For example, it can be indicated by setting or not setting a certain field, or carrying indication information, etc.

[0248] After receiving the measurement information reported by the terminal through the second event report, the network device can determine to use different data stream joint transmission modes to jointly send downlink data to the terminal according to the second event report, and then determine the network node for joint downlink data transmission according to the measurement information.

[0249] In some embodiments, the method further comprises:

[0250] After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

[0251] Specifically, when the network device includes a CU and multiple DUs connected to the CU, and each DU governs multiple network nodes, the time difference information may be determined by the CU.

[0252] Since the master DU is responsible for providing scheduling decisions, the CU can send time difference information to the master DU, and the master DU jointly sends downlink data to the terminal based on the time difference information.

[0253] In some embodiments, the method further comprises:

[0254] The CU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0255] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0256] Specifically, when the network device includes a CU and multiple DUs connected to the CU, and each DU governs multiple network nodes, the CU can determine the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information.

[0257] After the CU determines the data transmission time window adjustment information corresponding to the candidate network node of the terminal, it can send the data transmission time window adjustment information to the primary DU.

[0258] In some implementations, the CU can simultaneously send data transmission time window adjustment information to the primary DU and the secondary DU, which then adjust the time windows for forwarding data to their respective candidate network nodes. Alternatively, the primary DU and the secondary DU can notify their respective candidate network nodes to adjust the data transmission time windows, allowing the candidate network nodes under each DU to adjust their data transmission time windows based on the data transmission time window adjustment information. This allows the terminal to meet alignment requirements for receiving the same data stream sent by each candidate network node.

[0259] In some embodiments, the method further comprises:

[0260] After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the auxiliary DU of the network device.

[0261] Specifically, when the network device includes a CU and multiple DUs connected to the CU, and each DU has multiple network nodes under its jurisdiction, the main DU can determine the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or the CU can determine the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, and send the data sending time window adjustment information to the main DU.

[0262] After the primary DU determines the data transmission time window adjustment information, it can send the data transmission time window adjustment information to the secondary DU. The secondary DU can adjust the time window for forwarding data to the candidate network nodes under its jurisdiction based on the data transmission time window adjustment information. Alternatively, the secondary DU can send the data transmission time window adjustment information to the candidate network nodes under its jurisdiction, so that the candidate network nodes under its jurisdiction can adjust the time window for sending data based on the data transmission time window adjustment information. In this way, the time when the terminal receives the same data stream sent by each candidate network node can meet the alignment requirements.

[0263] FIG3 is a flow chart of an information reporting method provided by an embodiment of the present disclosure. As shown in FIG3 , the method is applied to a terminal and includes the following steps:

[0264] Step 300: Report measurement information to the network device, where the measurement information includes time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0265] Specifically, the network device in the embodiment of the present disclosure may be a base station, which has jurisdiction over multiple network nodes. The network device in the embodiment of the present disclosure may include a control unit and multiple data units connected to the control unit, each data unit having jurisdiction over multiple network nodes.

[0266] The control unit may also be interpreted as a centralized unit, and the data unit may also be interpreted as a distributed unit. The control unit and the data unit may be arranged geographically separately.

[0267] The network node may be a node having the function of sending information to a terminal and receiving information sent by the terminal. In some embodiments, the network node may include a TRP; or, the network node may include an AP; or, the network node may include a TRP and an AP.

[0268] The terminal may report measurement information to the network device, where the measurement information includes time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0269] In some embodiments, the downlink signal may include one or more of SSB, TRS, and CSI-RS.

[0270] Time difference information can be any information used to indicate the difference in arrival time of downlink signals sent by multiple different network nodes under the network device. The present disclosure does not limit the form of the time difference information. For example, the time difference information can include the difference in arrival time of downlink signals sent by any two of the multiple network nodes under the network device; or the time difference information can include DL RSTD information of the multiple network nodes under the network device.

[0271] It is understood that due to the varying distances between different network nodes and a terminal, even when different network nodes simultaneously transmit downlink signals to the terminal, the terminal receives the downlink signals from these different network nodes at different times. Therefore, a network device can determine the time difference between the arrival of downlink signals from multiple network nodes under its jurisdiction at the terminal and then jointly transmit downlink data to the terminal based on this time difference.

[0272] The information reporting method provided in the embodiment of the present disclosure reports measurement information to a network device through a terminal. The measurement information includes time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal. The network device can select different joint transmission methods based on the time difference information or adjust the joint transmission process before jointly transmitting downlink data to the terminal. Therefore, a scheme with better gain can be selected for downlink data transmission in different scenarios, thereby improving user throughput and system capacity.

[0273] In some embodiments, reporting the measurement information to the network device includes:

[0274] The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE, or an uplink control information UCI.

[0275] Specifically, the network device can pre-configure the terminal, and the terminal can measure the downlink signals sent by multiple network nodes under the network device according to the configuration of the network device, and report the time difference information of the downlink signals sent by multiple network nodes under the network device reaching the terminal to the network device.

[0276] The terminal may report the measurement information through a measurement event report; or, the terminal may report the measurement information through a MAC CE; or, the terminal may report the measurement information through a UCI.

[0277] For example, as shown in Table 1, R is a reserved bit, and the Ci field represents the sequential identifier configured for the UE to perform TRP measurement, indicating whether DL RSTD is triggered. If Ci is 1, the DL RSTD representing TRPi is reported. If Ci is 0, it indicates that the field of TRPi under the secondary DU does not exist or is not reported.

[0278] In some embodiments, reporting the measurement information to the network device via a measurement event report includes:

[0279] Reporting the measurement information to the network device through an event report of the first measurement event;

[0280] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0281] Specifically, the network device may configure a first measurement event for the terminal, for example, by configuring the first measurement event for the terminal via an RRC message. The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes reaching the same terminal meets a time alignment requirement for jointly transmitting the same downlink data stream.

[0282] According to the first measurement event configured by the network device, the terminal measures the time difference of the downlink signals sent by multiple network nodes under the network device and obtains the time difference measurement result, determines whether the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream, and reports the measurement information to the network device through the corresponding event report.

[0283] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0284] When a time difference between downlink signals sent by at least two network nodes among the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0285] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0286] Specifically, the network device may configure the terminal with a trigger condition that the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for the joint downlink transmission of the same data stream.

[0287] For example, when the time difference between downlink signals sent by at least two network nodes among the multiple network nodes and arriving at the terminal is less than the second threshold, it is determined that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

[0288] When the terminal determines that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream, the measurement information can be reported through the first event report of the first measurement event, and the first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0289] The embodiment of the present disclosure does not limit the manner in which the first event report indicates that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream. For example, it can be indicated by setting or not setting a certain field, or carrying indication information.

[0290] After receiving the measurement information reported by the terminal through the first event report, the network device can determine to use the same data stream joint transmission mode to jointly send downlink data to the terminal according to the first event report, and then determine the network node for joint downlink data transmission according to the measurement information.

[0291] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0292] When the time difference between downlink signals sent by multiple network nodes and the arrival of the terminal is greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0293] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0294] Specifically, the network device may configure the terminal with a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes reaching the same terminal does not meet a time alignment requirement for downlink joint transmission of the same data stream.

[0295] For example, when the time differences between downlink signals sent by multiple network nodes and arriving at the terminal are all greater than the third threshold, it is determined that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0296] When the terminal determines that the time difference measurement result does not meet the time alignment requirements for the downlink joint transmission of the same data stream, the measurement information can be reported through the second event report of the first measurement event, and the second event report is used to indicate that the time difference measurement result does not meet the time alignment requirements for the downlink joint transmission of the same data stream.

[0297] Among them, the embodiment of the present disclosure does not limit the way in which the second event report indicates that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream. For example, it can be indicated by setting or not setting a certain field, or carrying indication information, etc.

[0298] After receiving the measurement information reported by the terminal through the second event report, the network device can determine to use different data stream joint transmission modes to jointly send downlink data to the terminal according to the second event report, and then determine the network node for joint downlink data transmission according to the measurement information.

[0299] The methods provided in the various embodiments of the present disclosure are based on the same application concept, so the implementation of each method can refer to each other, and the repeated parts will not be repeated.

[0300] The following describes the methods provided in the above embodiments of the present disclosure by way of examples of specific application scenarios.

[0301] Example 1:

[0302] This embodiment is applicable to scenarios where the CU and DU are set separately. FIG4 is a schematic diagram of the process of scheduling on the network side provided by the embodiment of the present disclosure. As shown in FIG4, the process includes the following steps:

[0303] 1. The network side (CU) obtains the DL RSTD of different TRPs reported by the UE.

[0304] 2. The network side interactively obtains (i.e., CU sends to DU) DL RSTD of different TRPs.

[0305] 3. The network side (primary DU) determines whether the candidate TRPs meet the same flow scheduling conditions based on DL RSTD.

[0306] 4. If the same flow scheduling conditions are met, the master DU adds the corresponding TRP to the same flow TRP set for sending the same flow scheduling, and the process ends; if the same flow scheduling conditions are not met, jump to step 5.

[0307] 5. Determine whether each TRP supports adjustment of its transmit time window. This determination is based on whether the adjustment will affect data transmission for other users. If so, the master DU adjusts the transmit time window of each TRP based on the DL RSTD and then schedules the same flow. If not, the master DU adds the corresponding TRP to the set of TRPs for sending different flows for different flow scheduling.

[0308] Example 2:

[0309] This embodiment is applicable to scenarios where the CU and DU are combined, or scenarios where the CU performs scheduling.

[0310] The network-side scheduling process includes the following steps:

[0311] 1. The network side obtains the DL RSTD of different TRPs reported by the UE.

[0312] 2. The network side (CU or primary DU) determines whether the candidate TRPs meet the same flow scheduling conditions based on DL RSTD.

[0313] 3. If the same flow scheduling conditions are met, the CU or main DU adds the corresponding TRP to the same flow TRP set for sending the same flow scheduling, and the process ends; if the same flow scheduling conditions are not met, jump to step 4.

[0314] 4. Determine whether each TRP supports adjustment of its transmit time window. This determination is based on whether the adjustment will affect data transmission for other users. If so, the CU or master DU adjusts the transmit time window of each TRP based on the DL RSTD and then schedules the same flow. If not, the CU or master DU adds the corresponding TRP to the set of TRPs for sending different flows for different flow scheduling.

[0315] Embodiment 3: Add an event (Event): Event T1 in the RRC message (eg, ReportConfigNR). The base station configures Event T1 and threshold values: T1 event hysteresis t1_hysteresis and T1 event offset t1_offset through the RRC message.

[0316] The UE uses the TRP of the primary DU as the reference TRP and performs DL RSTD measurements on the TRPs of the neighboring DUs. When the UE measurement result satisfies Formula 1 or Formula 2, it reports a T1 event report and fills the UE DL RSTD measurement result in the newly added parameter MeasResultNeighTrpss. DL RSTD < -t1_hysteresis - t1_offset Formula 1 (triggering the time alignment difference of the same stream in joint transmission) DL RSTD > t1_hysteresis - t1_offset Formula 2 (triggering the time alignment difference of the same stream in joint transmission)

[0317] The unit of DL RSTD is T c . T c The definition of T c =1 / (Δf max ·N f ), where Δf max =480×10 3 Hz, N f =4096.

[0318] If any DL RSTD satisfies formula 1, it means that the time difference between the TRP of the primary DU and the TRP of the secondary DU meets the time alignment requirement for joint transmission of the same stream, and the UE does not set the report on leave field in the event report.

[0319] If the DL RSTD satisfies formula 2, it means that the time difference between the TRP of the primary DU and the TRP of the secondary DU does not meet the time alignment requirement for joint transmission of the same stream. The UE sets the report on leave field in the event report.

[0320] After the CU's RRC layer receives the T1 event report, if the UE's event report does not have the report on leave field set, it is considered that the same stream transmission is met and can directly instruct the DU to perform the same stream transmission. Alternatively, the relevant information can be sent to the DU responsible for scheduling, which will decide whether to perform the same stream transmission for the UE. After the primary DU generates the physical layer data, it forwards the physical layer data to the secondary DU, which then sends it to the subordinate TRP.

[0321] After the CU's RRC layer receives the T1 event report, if the event report reported by the UE sets the report on leave field, it can instruct the primary DU to schedule different flow resources for the UE. The primary DU generates physical layer data and maps different flows to the TRPs under the primary and secondary DUs. The primary DU sends the physical layer data flow mapped to the TRP under the primary DU to its subordinate TRPs. The primary DU sends the physical layer data flow mapped to the TRP under the secondary DU to the secondary DU, and the secondary DU sends it to the subordinate TRPs.

[0322] Example 4: The process of the terminal reporting the event report refers to the steps described in Example 3.

[0323] After the CU's RRC layer receives the T1 event report, if the event report reported by the UE sets the report on leave field, it needs to pass the measurement results to the primary DU through the newly defined CU to DU interface. The primary DU physical layer notifies the secondary DU to adjust the forwarding downlink data sending time window based on the received DL RSTD to ensure that the DL RSTD of the PDSCH received by the UE from the TRP under the secondary DU meets the time alignment difference requirements for joint transmission of the same stream.

[0324] Figure 5 is a schematic diagram illustrating adjusting the PDSCH transmission time window for the TRP assigned to a secondary DU, as provided in an embodiment of the present disclosure. As shown in Figure 5, during time period T1, the UE measures and reports an event report, setting the report on leave field. During time period T2, the primary DU instructs the secondary DU to adjust the time window for forwarding physical layer data based on the event report reported by the UE. During time period T3, the PDSCHs received by the UE from each TRP are time-aligned to meet the requirement for jointly transmitting the same stream.

[0325] Figure 6 is a schematic diagram of information interaction provided by an embodiment of the present disclosure. As shown in Figure 6, after the main CU receives the T1 event, it transmits the relevant measurement results (DL RSTD) to the main DU through the time arrival interface (control plane interface) between the CU and the DU. In the figure, TRP1 belongs to the main DU, and TRP2 belongs to the auxiliary DU. The main DU and the auxiliary DU are connected by establishing a tunnel or a user plane interface. The main DU and TRP1, and the auxiliary DU and TRP2 are connected through a fronthaul link. The interfaces currently supported between DU and TRP include Common Public Radio Interface (CPRI) and enhanced Common Public Radio Interface (eCPRI).

[0326] When forwarding physical layer data to the secondary DU, the primary DU can notify the secondary DU to adjust the transmission time window. The secondary DU can forward the physical layer data to the TRP under the secondary DU according to the primary DU's instructions and the adjusted transmission time window.

[0327] The methods and devices provided in the various embodiments of the present disclosure are based on the same application concept. Since the methods and devices solve problems based on similar principles, the implementation of the devices and methods can refer to each other, and the repeated parts will not be repeated.

[0328] FIG7 is a schematic structural diagram of a network device provided in an embodiment of the present disclosure. As shown in FIG7 , the network device includes a memory 720 , a transceiver 710 , and a processor 700 ; wherein the processor 700 and the memory 720 may also be physically arranged separately.

[0329] The memory 720 is used to store computer programs; the transceiver 710 is used to send and receive data under the control of the processor 700.

[0330] Specifically, the transceiver 710 is configured to receive and send data under the control of the processor 700 .

[0331] In FIG7 , the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits such as one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and are therefore not further described in this disclosure. The bus interface provides an interface. The transceiver 710 may be a plurality of components, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, or the like.

[0332] The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 when performing operations.

[0333] The processor 700 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0334] The processor 700 calls the computer program stored in the memory 720 to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions, for example:

[0335] Determine the time difference between downlink signals sent by multiple network nodes under the network device and reaching the terminal;

[0336] Based on the time difference information, downlink data is jointly sent to the terminal.

[0337] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0338] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly transmitted to the terminal using the same data stream joint transmission mode.

[0339] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0340] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0341] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0342] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and the downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0343] In some embodiments, determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0344] Receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or,

[0345] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0346] In some embodiments, receiving measurement information reported by a terminal includes:

[0347] The receiving terminal reports measurement information through measurement event reports, media access control layer control elements (MAC CE), or uplink control information (UCI).

[0348] In some embodiments, receiving measurement information reported by a terminal through a measurement event report includes:

[0349] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0350] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0351] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0352] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0353] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0354] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0355] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0356] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0357] In some embodiments, the method further comprises:

[0358] After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

[0359] In some embodiments, the method further comprises:

[0360] The CU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0361] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0362] In some embodiments, the method further comprises:

[0363] After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the auxiliary DU of the network device.

[0364] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0365] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0366] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0367] FIG8 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG8 , the terminal includes a memory 820 , a transceiver 810 , and a processor 800 ; wherein the processor 800 and the memory 820 may also be physically arranged separately.

[0368] The memory 820 is used to store computer programs; the transceiver 810 is used to send and receive data under the control of the processor 800.

[0369] Specifically, the transceiver 810 is configured to receive and send data under the control of the processor 800 .

[0370] In FIG8 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 800 and memory represented by memory 820, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described in this disclosure. The bus interface provides an interface. The transceiver 810 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and other transmission media. For different user devices, the user interface 830 may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0371] The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 when performing operations.

[0372] The processor 800 may be a CPU, an ASIC, an FPGA, or a CPLD, and the processor may also adopt a multi-core architecture.

[0373] The processor 800 calls the computer program stored in the memory 820 to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions, for example:

[0374] The measurement information is reported to the network device, where the measurement information includes time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0375] In some embodiments, reporting the measurement information to the network device includes:

[0376] The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE, or an uplink control information UCI.

[0377] In some embodiments, reporting the measurement information to the network device via a measurement event report includes:

[0378] Reporting the measurement information to the network device through an event report of the first measurement event;

[0379] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0380] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0381] When a time difference between downlink signals sent by at least two network nodes among the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0382] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0383] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0384] When the time difference between downlink signals sent by multiple network nodes and the arrival of the terminal is greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0385] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0386] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0387] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0388] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0389] It should be noted here that the above-mentioned network equipment and terminal provided in the embodiments of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiments and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiments will not be described in detail here.

[0390] FIG9 is a schematic structural diagram of a data sending device provided in an embodiment of the present disclosure. As shown in FIG9 , the device includes:

[0391] A determining unit 900 is configured to determine time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal;

[0392] The joint sending unit 910 is configured to jointly send downlink data to the terminal based on the time difference information.

[0393] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0394] When the time difference between downlink signals sent by at least two candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly transmitted to the terminal using the same data stream joint transmission mode.

[0395] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0396] When the time differences between downlink signals sent by the candidate network nodes of the terminal and arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0397] In some embodiments, jointly sending downlink data to a terminal based on the time difference information includes:

[0398] Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and the downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

[0399] In some embodiments, determining time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal includes:

[0400] Receiving measurement information reported by the terminal, the measurement information including time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal; or,

[0401] The time difference information of the uplink signal sent by the terminal reaching the multiple network nodes under the network device is used as the time difference information of the downlink signals sent by the multiple network nodes under the network device reaching the terminal.

[0402] In some embodiments, receiving measurement information reported by a terminal includes:

[0403] The receiving terminal reports measurement information through measurement event reports, media access control layer control elements (MAC CE), or uplink control information (UCI).

[0404] In some embodiments, receiving measurement information reported by a terminal through a measurement event report includes:

[0405] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0406] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0407] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0408] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0409] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0410] In some embodiments, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0411] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0412] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0413] In some embodiments, the apparatus further includes a first sending unit configured to:

[0414] The CU of the network device sends the time difference information to the master data unit DU of the network device.

[0415] In some embodiments, the apparatus further includes a second sending unit, configured to:

[0416] The CU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0417] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0418] In some embodiments, the apparatus further includes a third sending unit, configured to:

[0419] The primary DU of the network device sends the data transmission time window adjustment information to the secondary DU of the network device.

[0420] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0421] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0422] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0423] FIG10 is a schematic diagram of the structure of an information reporting device provided in an embodiment of the present disclosure. As shown in FIG10 , the device includes:

[0424] The reporting unit 1000 is configured to report measurement information to the network device, where the measurement information includes time difference information between downlink signals sent by multiple network nodes under the network device and reaching the terminal.

[0425] In some embodiments, reporting the measurement information to the network device includes:

[0426] The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE, or an uplink control information UCI.

[0427] In some embodiments, reporting the measurement information to the network device via a measurement event report includes:

[0428] Reporting the measurement information to the network device through an event report of the first measurement event;

[0429] The first measurement event is used to indicate whether a measurement result of a time difference between downlink signals sent by different network nodes and arriving at the same terminal meets a time alignment requirement for jointly sending the same downlink data stream.

[0430] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0431] When a time difference between downlink signals sent by at least two network nodes among the multiple network nodes and arrival at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event;

[0432] The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for the downlink joint transmission of the same data stream.

[0433] In some embodiments, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0434] When the time difference between downlink signals sent by multiple network nodes and the arrival of the terminal is greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event;

[0435] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

[0436] In some embodiments, the downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

[0437] In some embodiments, the time difference information includes downlink reference signal time difference DL RSTD information.

[0438] In some embodiments, the network node includes a transmission reception point TRP and / or an access point AP.

[0439] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0440] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0441] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0442] On the other hand, an embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the data sending method or information reporting method provided in the above embodiments.

[0443] It should be noted here that the computer-readable storage medium provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0444] The computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs), etc.).

[0445] The technical solution provided by the embodiment of the present disclosure can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0446] The terminal involved in the embodiments of the present disclosure may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal may also be different. For example, in a 5G system, the terminal may be called User Equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present disclosure.

[0447] The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be called another name. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a base transceiver station (BTS) in the Global System for Mobile communications (GSM) or code division multiple access (CDMA), a network device (NodeB) in wide-band code division multiple access (WCDMA), an evolutionary Node B (eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of the present disclosure. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0448] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO. It can also use diversity transmission, precoding, or beamforming.

[0449] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0450] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0451] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0452] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0453] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A data transmission method, applied to a network device, comprising: Determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; Based on the time difference information, downlink data is jointly sent to the terminal.

2. The data transmission method according to claim 1, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time difference between downlink signals sent by at least two of the candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

3. The data transmission method according to claim 1, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

4. The data transmission method according to claim 1, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

5. The data transmission method according to claim 1, wherein: The determining of time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes: receiving measurement information reported by the terminal, the measurement information including time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; or, The time difference information of the uplink signal sent by the terminal arriving at the multiple network nodes under the network device is used as the time difference information of the downlink signal sent by the multiple network nodes under the network device arriving at the terminal.

6. The data transmission method according to claim 5, wherein: The receiving the measurement information reported by the terminal includes: The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

7. The data transmission method according to claim 6, wherein: The receiving the measurement information reported by the terminal through a measurement event report includes: receiving the measurement information reported by the terminal through an event report of a first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for the downlink joint transmission of the same data stream.

8. The data transmission method according to claim 7, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a first event report of a first measurement event; The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

9. The data transmission method according to claim 7, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a second event report of a first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

10. The data transmission method according to claim 4, wherein: The method further comprises: After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

11. The data transmission method according to claim 4, wherein: The method further comprises: The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal; The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

12. The data transmission method according to claim 4, 10 or 11, wherein: The method further comprises: The master DU of the network device determines a candidate network for the terminal based on the time difference information. The main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node, or after the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the auxiliary DU of the network device.

13. The data transmission method according to any one of claims 1 to 9, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

14. The data transmission method according to any one of claims 1 to 9, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

15. The data transmission method according to any one of claims 1 to 9, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

16. An information reporting method, applied to a terminal, comprising: The measurement information is reported to the network device, where the measurement information includes time difference information when downlink signals sent by a plurality of network nodes under the network device reach the terminal.

17. The information reporting method according to claim 16, wherein: The reporting of the measurement information to the network device includes: The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE or uplink control information UCI.

18. The information reporting method according to claim 17, wherein: Reporting the measurement information to the network device through a measurement event report includes: Reporting the measurement information to the network device through an event report of the first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for downlink joint transmission of the same data stream.

19. The information reporting method according to claim 18, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When a time difference between downlink signals sent by at least two of the multiple network nodes and arriving at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event; The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

20. The information reporting method according to claim 18, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When the time differences between downlink signals sent by the multiple network nodes and arriving at the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

21. The information reporting method according to any one of claims 16 to 20, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

22. The information reporting method according to any one of claims 16 to 20, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

23. The information reporting method according to any one of claims 16 to 20, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

24. A network device comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; Based on the time difference information, downlink data is jointly sent to the terminal.

25. The network device according to claim 24, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time difference between downlink signals sent by at least two of the candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

26. The network device according to claim 24, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

27. The network device according to claim 24, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

28. The network device according to claim 24, wherein: The determining of time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes: receiving measurement information reported by the terminal, the measurement information including time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; or, The time difference information of the uplink signal sent by the terminal arriving at the multiple network nodes under the network device is used as the time difference information of the downlink signal sent by the multiple network nodes under the network device arriving at the terminal.

29. The network device according to claim 28, wherein: The receiving the measurement information reported by the terminal includes: The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

30. The network device according to claim 29, wherein: The receiving the measurement information reported by the terminal through a measurement event report includes: receiving the measurement information reported by the terminal through an event report of a first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for downlink joint transmission of the same data stream.

31. The network device according to claim 30, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a first event report of a first measurement event; The first event report is used to indicate that the time difference measurement result meets the downlink joint transmission requirement. Time alignment requirements for sending the same data stream.

32. The network device according to claim 30, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a second event report of a first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

33. The network device according to claim 27, wherein: The operations also include: After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

34. The network device according to claim 27, wherein: The operations also include: The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal; The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

35. The network device according to claim 27, 33 or 34, wherein: The operations also include: After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or after the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the auxiliary DU of the network device.

36. The network device according to any one of claims 24 to 32, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

37. The network device according to any one of claims 24 to 32, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

38. The network device according to any one of claims 24 to 32, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

39. A terminal comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: The measurement information is reported to the network device, where the measurement information includes time difference information when downlink signals sent by a plurality of network nodes under the network device reach the terminal.

40. The terminal according to claim 39, wherein: The reporting of the measurement information to the network device includes: The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE or uplink control information UCI.

41. The terminal according to claim 40, wherein: Reporting the measurement information to the network device through a measurement event report includes: Reporting the measurement information to the network device through an event report of the first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for downlink joint transmission of the same data stream.

42. The terminal according to claim 41, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When a time difference between downlink signals sent by at least two of the multiple network nodes and arriving at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event; The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

43. The terminal according to claim 41, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When the time differences between downlink signals sent by the multiple network nodes and arriving at the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

44. The terminal according to any one of claims 39 to 43, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

45. The terminal according to any one of claims 39 to 43, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

46. ​​The terminal according to any one of claims 39 to 43, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

47. A data sending device, comprising: A determination unit, used to determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; A joint sending unit is used to jointly send downlink data to the terminal based on the time difference information.

48. The data transmitting device according to claim 47, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time difference between downlink signals sent by at least two of the candidate network nodes of the terminal and reaching the terminal is less than or equal to a first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

49. The data transmitting device according to claim 47, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than a first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

50. The data transmitting device according to claim 47, wherein: The jointly sending downlink data to the terminal based on the time difference information includes: Based on the time difference information, the data sending time window of the candidate network node of the terminal is adjusted, and downlink data is jointly sent to the terminal using the same data stream joint transmission mode.

51. The data transmitting device according to claim 47, wherein: The determining of time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes: receiving measurement information reported by the terminal, the measurement information including time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal; or, The time difference information of the uplink signal sent by the terminal arriving at the multiple network nodes under the network device is used as the time difference information of the downlink signal sent by the multiple network nodes under the network device arriving at the terminal.

52. The data transmitting device according to claim 51, wherein: The receiving the measurement information reported by the terminal includes: The measurement information reported by the terminal through a measurement event report, a media access control layer control element MAC CE, or uplink control information UCI is received.

53. The data transmitting device according to claim 52, wherein: The receiving the measurement information reported by the terminal through a measurement event report includes: receiving the measurement information reported by the terminal through an event report of a first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for downlink joint transmission of the same data stream.

54. The data transmitting device according to claim 53, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a first event report of a first measurement event; The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

55. The data transmitting device according to claim 53, wherein: The receiving the measurement information reported by the terminal through an event report of the first measurement event includes: receiving the measurement information reported by the terminal through a second event report of a first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

56. The data transmitting device according to claim 50, wherein: The device also includes a first sending unit, configured to: After the control unit CU of the network device determines the time difference information, the CU of the network device sends the time difference information to the master data unit DU of the network device.

57. The data transmitting device according to claim 50, wherein: The device also includes a second sending unit, configured to: The CU of the network device determines, based on the time difference information, data transmission time window adjustment information corresponding to the candidate network node of the terminal; The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

58. The data transmitting device according to claim 50, 56 or 57, wherein: The device further includes a third sending unit, configured to: After the main DU of the network device determines the data sending time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information, or after the main DU of the network device receives the data sending time window adjustment information corresponding to the candidate network node of the terminal sent by the CU of the network device, the main DU of the network device sends the data sending time window adjustment information to the auxiliary DU of the network device.

59. The data transmitting device according to any one of claims 47 to 55, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

60. The data transmitting device according to any one of claims 47 to 55, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

61. The data transmitting device according to any one of claims 47 to 55, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

62. An information reporting device, comprising: The reporting unit is used to report measurement information to the network device, wherein the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

63. The information reporting device according to claim 62, wherein: The reporting of the measurement information to the network device includes: The measurement information is reported to the network device through a measurement event report, a media access control layer control element MAC CE or uplink control information UCI.

64. The information reporting device according to claim 63, wherein: Reporting the measurement information to the network device through a measurement event report includes: Reporting the measurement information to the network device through an event report of the first measurement event; The first measurement event is used to indicate whether the time difference measurement result of downlink signals sent by different network nodes reaching the same terminal meets the time alignment requirement for the downlink joint transmission of the same data stream.

65. The information reporting device according to claim 64, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When a time difference between downlink signals sent by at least two of the multiple network nodes and arriving at the terminal is less than a second threshold, reporting the measurement information to the network device through a first event report of the first measurement event; The first event report is used to indicate that the time difference measurement result meets the time alignment requirement for downlink joint transmission of the same data stream.

66. The information reporting device according to claim 64, wherein: The reporting the measurement information to the network device through an event report of the first measurement event includes: When the time differences between downlink signals sent by the multiple network nodes and arriving at the terminal are all greater than a third threshold, reporting the measurement information to the network device through a second event report of the first measurement event; The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for downlink joint transmission of the same data stream.

67. The information reporting device according to any one of claims 62 to 66, wherein: The downlink signal includes one or more of a synchronization signal block SSB, a tracking reference signal TRS, and a channel state information reference signal CSI-RS.

68. The information reporting device according to any one of claims 62 to 66, wherein: The time difference information includes downlink reference signal time difference DL RSTD information.

69. The information reporting device according to any one of claims 62 to 66, wherein: The network nodes include a transmission reception point TRP and / or an access point AP.

70. A computer-readable storage medium storing a computer program, wherein the computer program is used to cause a computer to execute the method according to any one of claims 1 to 15.

71. A computer-readable storage medium storing a computer program, wherein the computer program is used to cause a computer to execute the method according to any one of claims 16 to 23.

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