Data sending method, information reporting method, equipment and device

Abstract

The embodiment of the invention provides a data sending method, an information reporting method, equipment and a device, and the data sending method comprises the steps that network equipment determines time difference information when downlink signals sent by a plurality of network nodes under the jurisdiction of the network equipment reach a terminal; and on the basis of the time difference information, performing downlink data joint transmission on the terminal. Therefore, downlink data transmission can be carried out by selecting a scheme with a better gain in different scenes, and the throughput and the system capacity of a user are improved.

Description

Technical Field

[0001] The present application 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

[0002] Downlink joint transmission (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 to transmit different data streams according to a certain strategy.

[0003] Among them, the gain of transmitting the same data stream is theoretically higher than the gain of transmitting different data streams. However, most scenarios currently only use solutions for transmitting different data streams, which loses part of the gain and thus affects user throughput and system capacity. Summary of the invention

[0004] In view of the problems existing in the prior art, the embodiments of the present application provide a data sending method, an information reporting method, a device and an apparatus.

[0005] In a first aspect, an embodiment of the present application provides a data sending method, which is applied to a network device, including:

[0006] Determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal;

[0007] Based on the time difference information, downlink data is jointly sent to the terminal.

[0008] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0009] 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.

[0010] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0011] 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.

[0012] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0013] 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.

[0014] Optionally, the determining the time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes:

[0015] 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,

[0016] 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.

[0017] Optionally, the receiving measurement information reported by the terminal includes:

[0018] 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.

[0019] Optionally, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0020] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0021] 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.

[0022] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0024] 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.

[0025] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0027] 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.

[0028] Optionally, the method further comprises:

[0029] 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.

[0030] Optionally, the method further comprises:

[0031] 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;

[0032] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0033] Optionally, the method further comprises:

[0034] 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.

[0035] Optionally, 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.

[0036] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0037] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0038] In a second aspect, an embodiment of the present application further provides an information reporting method, which is applied to a terminal, comprising:

[0039] 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.

[0040] Optionally, reporting the measurement information to the network device includes:

[0041] 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.

[0042] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0043] Reporting the measurement information to the network device through an event report of the first measurement event;

[0044] 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.

[0045] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0046] 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;

[0047] 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.

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

[0049] 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;

[0050] 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.

[0051] Optionally, 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.

[0052] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0053] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0054] In a third aspect, an embodiment of the present application further provides a network device, including a memory, a transceiver, and a processor:

[0055] 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:

[0056] Determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal;

[0057] Based on the time difference information, downlink data is jointly sent to the terminal.

[0058] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0059] 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.

[0060] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0061] 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.

[0062] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0063] 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.

[0064] Optionally, the determining the time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes:

[0065] 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,

[0066] 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.

[0067] Optionally, the receiving measurement information reported by the terminal includes:

[0068] 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.

[0069] Optionally, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0070] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0071] 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.

[0072] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0074] 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.

[0075] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0077] 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.

[0078] Optionally, the operation further includes:

[0079] 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.

[0080] Optionally, the operation further includes:

[0081] 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;

[0082] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0083] Optionally, the operation further includes:

[0084] 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.

[0085] Optionally, 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.

[0086] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0087] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0088] In a fourth aspect, an embodiment of the present application further provides a terminal, including a memory, a transceiver, and a processor:

[0089] 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:

[0090] 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.

[0091] Optionally, reporting the measurement information to the network device includes:

[0092] 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.

[0093] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0094] Reporting the measurement information to the network device through an event report of the first measurement event;

[0095] 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.

[0096] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0097] 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;

[0098] 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.

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

[0100] 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;

[0101] 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.

[0102] Optionally, 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.

[0103] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0104] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0105] In a fifth aspect, an embodiment of the present application further provides a data sending device, including:

[0106] A determination unit, used to determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal;

[0107] A joint sending unit is used to jointly send downlink data to the terminal based on the time difference information.

[0108] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0109] 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.

[0110] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0111] 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.

[0112] Optionally, the jointly sending downlink data to the terminal based on the time difference information includes:

[0113] 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.

[0114] Optionally, the determining of time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal includes:

[0115] 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,

[0116] 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.

[0117] Optionally, the receiving measurement information reported by the terminal includes:

[0118] 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.

[0119] Optionally, the receiving the measurement information reported by the terminal through a measurement event report includes:

[0120] receiving the measurement information reported by the terminal through an event report of a first measurement event;

[0121] 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.

[0122] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0124] 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.

[0125] Optionally, the receiving the measurement information reported by the terminal through an event report of a first measurement event includes:

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

[0127] 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.

[0128] Optionally, the device further comprises:

[0129] A sending unit, used for the CU of the network device to send the time difference information to the main data unit DU of the network device.

[0130] Optionally, the determining unit is further configured to:

[0131] 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;

[0132] The device also includes:

[0133] A sending unit is used for the CU of the network device to send the data sending time window adjustment information to the main DU of the network device.

[0134] Optionally, the device further comprises:

[0135] The sending unit is used for the primary DU of the network device to send the data sending time window adjustment information to the secondary DU of the network device.

[0136] Optionally, 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.

[0137] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0138] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0139] In a sixth aspect, an embodiment of the present application further provides an information reporting device, including:

[0140] 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.

[0141] Optionally, reporting the measurement information to the network device includes:

[0142] 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.

[0143] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0144] Reporting the measurement information to the network device through an event report of the first measurement event;

[0145] 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.

[0146] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0147] 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;

[0148] 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.

[0149] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0150] 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;

[0151] 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.

[0152] Optionally, 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.

[0153] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0154] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0155] In the seventh aspect, an embodiment of the present application also 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 described in the first aspect as described above, or to execute the information reporting method described in the second aspect as described above.

[0156] In an eighth aspect, an embodiment of the present application 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 as described above, or to execute the information reporting method described in the second aspect as described above.

[0157] In the ninth aspect, an embodiment of the present application also 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 as described above, or to execute the information reporting method described in the second aspect as described above.

[0158] In the tenth aspect, an embodiment of the present application 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 as described above, or to execute the information reporting method described in the second aspect as described above.

[0159] The data sending method, information reporting method, equipment and device provided in the embodiments of the present application select different joint transmission modes or adjust the joint transmission process based on the time difference information of the downlink signals sent by multiple network nodes under its jurisdiction arriving at the terminal, and then jointly send downlink data to the terminal, so that 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

[0160] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0161] Figure 1 A schematic diagram of a user-centric access network architecture provided for related technologies;

[0162] Figure 2 A flowchart of a data transmission method provided in an embodiment of the present application;

[0163] Figure 3 A flowchart of an information reporting method provided in an embodiment of the present application;

[0164] Figure 4 A schematic diagram of a process for scheduling on the network side provided in an embodiment of the present application;

[0165] Figure 5 A schematic diagram of adjusting the PDSCH transmission time window of the TRP under the secondary DU provided in an embodiment of the present application;

[0166] Figure 6 A schematic diagram of information interaction provided in an embodiment of the present application;

[0167] Figure 7 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0168] Figure 8 A schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0169] Fig. 9 A schematic diagram of the structure of a data sending device provided in an embodiment of the present application;

[0170] Fig.10 A schematic diagram of the structure of an information reporting device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0171] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0172] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0173] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0174] In order to facilitate a clearer understanding of the technical solutions of the embodiments of the present application, some technical contents related to the embodiments of the present application are first introduced.

[0175] 1. Downlink joint transmission

[0176] Multi-point coordinated transmission, including downlink joint transmission, supports the serving cell and the cooperative cell to select the same time-frequency resources to transmit the same data stream, or to transmit different data streams according to a certain strategy.

[0177] 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 as to perform signal superposition within the UE receiving window and 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, a maximum gain of only 3dB can be obtained, i.e., a 3dB coherent reception gain is lost. However, sending the same data stream has strict requirements on the arrival time alignment of PDSCH sent by different base stations or TRPs at the UE. If the requirements are not met, it will cause inter-symbol interference (ISI), thereby reducing the gain or even causing negative gain.

[0178] 2. User-centric access network architecture

[0179] 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 TRPs under cross-network devices are organized to coordinate transmission and serve one UE, thereby improving the user experience.

[0180] Figure 1 A schematic diagram of a user-centric access network architecture provided for related technologies. Figure 1 As shown, the network side control unit (CU) or data unit (DU) determines to organize a flexible cell, and TRP3, TRP4, and TRP8 serve UE1, and configures some or all of the same access and transmission resources for TRP3, TRP4, and TRP8. The various parts are introduced as follows:

[0181] (1) As the control plane anchor node, the CU has the functions of establishing, maintaining and releasing the Radio Resource Control (RRC) connection; establishing, configuring, maintaining and releasing the bearer; managing UE measurement reports, managing and distributing UE contexts; configuring candidate TRP sets; and selecting DUs.

[0182] (2) DU, as a data scheduling entity, has the functions of selecting a specific TRP to perform addressing, distribution, and scheduling transmission for users.

[0183] (3) TRP is a data transceiver node that undertakes some physical layer functions such as radio frequency and Fast Fourier Transformation (FFT). Depending on the actual device function differences, this node can also be an access point AP device that carries more functions, or a base station with various simplified function configurations.

[0184] (4) Flexible cell: An area composed of one or more APs / TRPs with some / 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, that is, the coverage area is variable. The AP / TRP of a flexible cell can be flexibly organized by the data plane unit DU. For any terminal, the DU responsible for providing scheduling decisions can be called the primary DU, and the DU that only provides AP / TRP resources and does not make scheduling decisions can be called the secondary DU.

[0185] Figure 2 A flow chart of a data transmission method provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the method is applied to a network device and comprises the following steps:

[0186] Step 200: Determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0187] Step 201: jointly send downlink data to the terminal based on the time difference information.

[0188] Specifically, the network device in the embodiment of the present application may be a base station, which has jurisdiction over multiple network nodes. The network device in the embodiment of the present application may include a control unit and multiple data units connected to the control unit, and each data unit has jurisdiction over multiple network nodes.

[0189] 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 separately geographically.

[0190] The network node may be a node having the function of sending information to a terminal and receiving information sent by the terminal. Optionally, 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.

[0191] Before performing joint downlink transmission to a certain terminal, the network device may first determine the time difference information of the downlink signals sent by the multiple network nodes under its jurisdiction reaching the terminal.

[0192] Optionally, the downlink signal may include one or more of a synchronization signal block (Synchronization Signal Block, SSB), a tracking reference signal (Tracking Reference Signal, TRS), and a channel state information reference signal (Channel-State Information Reference Signal, CSI-RS).

[0193] The time difference information may be any information used to indicate the time difference of downlink signals sent by multiple different network nodes under the network device arriving at the terminal. The embodiment of the present application does not limit the form of the time difference information. For example, the time difference information may include the information of the time difference of downlink signals sent by any two network nodes among the multiple network nodes under the network device arriving at the terminal; or, the time difference information may include the downlink reference signal time difference (DL RSTD) information of the multiple network nodes under the network device.

[0194] It is understandable that, due to the different distances between different network nodes and the terminal, different network nodes send downlink signals to the terminal at the same time, but the time when the terminal receives the downlink signals sent by different network nodes is different. Therefore, after determining the time difference information of the downlink signals sent by multiple network nodes under its jurisdiction to reach the terminal, the network device can jointly send downlink data to the terminal based on the time difference information.

[0195] The data sending method provided in the embodiment of the present application 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 arriving at the terminal, and then jointly sends downlink data to the terminal, so that a scheme with better gain can be selected for downlink data transmission in different scenarios, thereby improving user throughput and system capacity.

[0196] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0197] 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 the first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

[0198] 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.

[0199] When the time difference between 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 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.

[0200] 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, the time difference between the downlink signals sent by any two TRPs among TRP1, TRP2 and TRP3 reaching the terminal is less than or equal to the first threshold, and 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.

[0201] Selecting a network node that satisfies the condition that the time difference is less than or equal to the first threshold 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 obtaining a higher gain when merging the same data streams.

[0202] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0203] When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than the first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0204] 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.

[0205] 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 adopt different data stream joint transmission methods to jointly send downlink data to the terminal.

[0206] For example, the candidate TRPs are TRP1, TRP2 and TRP3, and the time difference between the downlink signals sent by any two TRPs and reaching 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.

[0207] 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, different data streams are jointly transmitted to the terminal to jointly send downlink data. Compared with the same data stream joint transmission method, a more stable gain can be obtained.

[0208] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0209] 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.

[0210] 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 for the terminal to receive the same data stream sent by each candidate network node meets the alignment requirements.

[0211] In the embodiment of the present application, the network device does not limit the specific adjustment method of the data sending time window of the candidate network node. For example, a reference network node can be selected to adjust the data sending time window of other network nodes according to the time difference between other network nodes and the reference network node.

[0212] Based on the time difference information, the data sending 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 obtaining a higher gain when merging the same data streams.

[0213] Optionally, determining time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal includes:

[0214] 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,

[0215] 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 signal sent by the multiple network nodes under the network device reaching the terminal.

[0216] 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.

[0217] Optionally, receiving measurement information reported by the terminal includes:

[0218] The receiving terminal reports measurement information through measurement event report, media access control layer control element MAC CE or uplink control information UCI.

[0219] 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.

[0220] 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 layer control element (Medium Access Control Control Element, MAC CE); or, the terminal may report the measurement information through uplink control information (Uplink Control Information, UCI).

[0221] 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 to trigger DL RSTD reporting. If Ci is 1, the DL RSTD representing TRPi is reported, and if Ci is 0, it indicates that the field of TRPi under the secondary DU does not exist or is not reported.

[0222] Table 1 Example of terminal reporting via MAC CE

[0223]

[0224] In some implementations, multiple network nodes in a network device may receive uplink signals simultaneously sent by a 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 arriving at 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.

[0225] In a scenario where uplink and downlink channel reciprocity is met, the network device may 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 the multiple network nodes under the network device reaching the terminal.

[0226] 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 signal sent by the 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.

[0227] Optionally, the measurement information reported by the receiving terminal through the measurement event report includes:

[0228] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0229] 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.

[0230] Specifically, the network device can configure the first measurement event to the terminal, for example, by using an RRC message. 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.

[0231] According to the first measurement event configured by the network device, the terminal measures the time difference of 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 sending of the same data stream, and reports the measurement information to the network device through the corresponding event report.

[0232] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0233] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0234] 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.

[0235] Specifically, the network device may configure, for the terminal, a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes and reaching the same terminal satisfies a time alignment requirement for the joint downlink transmission of the same data stream.

[0236] 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.

[0237] When the terminal determines that the time difference measurement result meets the time alignment requirement for the joint downlink 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 joint downlink transmission of the same data stream.

[0238] Among them, the embodiment of the present application 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, etc.

[0239] 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 used for the joint transmission of downlink data according to the measurement information.

[0240] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0241] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0242] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0243] Specifically, the network device may configure, for the terminal, a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes and reaching the same terminal does not meet a time alignment requirement for downlink joint transmission of the same data stream.

[0244] For example, when the time differences of downlink signals sent by multiple network nodes 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 downlink joint transmission of the same data stream.

[0245] When the terminal determines that the time difference measurement result does not meet the time alignment requirement for the downlink joint sending 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 requirement for the downlink joint sending of the same data stream.

[0246] Among them, the embodiment of the present application does not limit the manner 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.

[0247] 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 used for joint transmission of downlink data according to the measurement information.

[0248] Optionally, the method further comprises:

[0249] 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.

[0250] 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.

[0251] Since the master DU is responsible for providing scheduling decisions, the CU can send the time difference information to the master DU, and the master DU jointly sends downlink data to the terminal based on the time difference information.

[0252] Optionally, the method further comprises:

[0253] The CU of the network device determines the data transmission time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0254] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0255] 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.

[0256] After the CU determines the data transmission time window adjustment information corresponding to the candidate network node of the terminal, the data transmission time window adjustment information can be sent to the main DU.

[0257] In some implementations, the CU may send data transmission time window adjustment information to the primary DU and the secondary DU at the same time, and the primary DU and the secondary DU adjust the time window for forwarding data to the candidate network nodes under their jurisdiction; or, the primary DU and the secondary DU notify the candidate network nodes under their jurisdiction to adjust the data transmission time window, so that the candidate network nodes under each DU can adjust the time window for sending data according to the data transmission time window adjustment information. Thus, the time for the terminal to receive the same data stream sent by each candidate network node can meet the alignment requirements.

[0258] Optionally, the method further comprises:

[0259] 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.

[0260] 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 nodes 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 nodes of the terminal based on the time difference information, and send the data sending time window adjustment information to the main DU.

[0261] After the main DU determines the data transmission time window adjustment information, it can send the data transmission time window adjustment information to the auxiliary DU, and the auxiliary DU can adjust the time window for forwarding data to the candidate network node under the auxiliary DU according to the data transmission time window adjustment information; or the auxiliary DU sends the data transmission time window adjustment information to the candidate network node under the auxiliary DU, so that the candidate network node under the auxiliary DU can adjust the time window for sending data according to the data transmission time window adjustment information. Thus, the time for the terminal to receive the same data stream sent by each candidate network node can meet the alignment requirements.

[0262] Figure 3 A flow chart of the information reporting method provided in the embodiment of the present application is as follows: Figure 3 As shown, the method is applied to a terminal and comprises the following steps:

[0263] Step 300: Report measurement information to the network device, where the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0264] Specifically, the network device in the embodiment of the present application may be a base station, which has jurisdiction over multiple network nodes. The network device in the embodiment of the present application may include a control unit and multiple data units connected to the control unit, and each data unit has jurisdiction over multiple network nodes.

[0265] The control unit may also be interpreted as a centralized unit, the data unit may also be interpreted as a distributed unit, and the control unit and the data unit may be arranged geographically separately.

[0266] The network node may be a node having the function of sending information to a terminal and receiving information sent by the terminal. Optionally, 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.

[0267] The terminal may report measurement information to the network device, where the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0268] Optionally, the downlink signal may include one or more of SSB, TRS, and CSI-RS.

[0269] The time difference information may be any information used to indicate the time difference between downlink signals sent by multiple different network nodes under the network device and the time difference information reaches the terminal. The embodiment of the present application does not limit the form of the time difference information. For example, the time difference information may include the time difference between downlink signals sent by any two network nodes among the multiple network nodes under the network device and the time difference information reaches the terminal; or, the time difference information may include DLRSTD information of multiple network nodes under the network device.

[0270] It is understandable that, due to the different distances between different network nodes and the terminal, different network nodes send downlink signals to the terminal at the same time, but the time when the terminal receives the downlink signals sent by different network nodes is different. Therefore, after determining the time difference information of the downlink signals sent by multiple network nodes under its jurisdiction to reach the terminal, the network device can jointly send downlink data to the terminal based on the time difference information.

[0271] The information reporting method provided in the embodiment of the present application reports measurement information to a network device through a terminal. The measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal. The network device can select different joint transmission methods according to the time difference information or adjust the joint transmission process and then jointly send downlink data to the terminal, so that a scheme with better gain can be selected for downlink data transmission in different scenarios, thereby improving user throughput and system capacity.

[0272] Optionally, reporting the measurement information to the network device includes:

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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, and if Ci is 0, it indicates that the field of TRPi under the secondary DU does not exist or is not reported.

[0277] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0278] Reporting the measurement information to the network device through an event report of the first measurement event;

[0279] 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.

[0280] Specifically, the network device can configure the first measurement event to the terminal, for example, by using an RRC message. 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.

[0281] According to the first measurement event configured by the network device, the terminal measures the time difference of 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 sending of the same data stream, and reports the measurement information to the network device through the corresponding event report.

[0282] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0283] When the time difference between downlink signals sent by at least two network nodes among the multiple network nodes and reaching 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;

[0284] 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.

[0285] Specifically, the network device may configure, for the terminal, a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes and reaching the same terminal satisfies a time alignment requirement for the joint downlink transmission of the same data stream.

[0286] 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.

[0287] When the terminal determines that the time difference measurement result meets the time alignment requirement for the joint downlink 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 joint downlink transmission of the same data stream.

[0288] Among them, the embodiment of the present application 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, etc.

[0289] 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 used for the joint transmission of downlink data according to the measurement information.

[0290] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0291] When the time differences between downlink signals sent by multiple network nodes and arriving at the terminal are all greater than the third threshold, reporting the measurement information to the network device through the second event report of the first measurement event;

[0292] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0293] Specifically, the network device may configure, for the terminal, a trigger condition that a measurement result of a time difference between downlink signals sent by different network nodes and reaching the same terminal does not meet a time alignment requirement for downlink joint transmission of the same data stream.

[0294] For example, when the time differences of downlink signals sent by multiple network nodes 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 downlink joint transmission of the same data stream.

[0295] When the terminal determines that the time difference measurement result does not meet the time alignment requirement for the downlink joint sending 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 requirement for the downlink joint sending of the same data stream.

[0296] Among them, the embodiment of the present application does not limit the manner 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.

[0297] 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 used for joint transmission of downlink data according to the measurement information.

[0298] The methods provided in the embodiments of the present application 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.

[0299] The methods provided in the above embodiments of the present application are illustrated below through examples of specific application scenarios.

[0300] Embodiment 1:

[0301] This embodiment is applicable to the scenario where the CU and DU are separately configured. Figure 4 A schematic diagram of a flow chart of scheduling on the network side provided in an embodiment of the present application, such as Figure 4 As shown, the process includes the following steps:

[0302] 1. The network side (CU) obtains the DL RSTD of different TRPs reported by the UE.

[0303] 2. The network side interactively obtains (i.e., CU sends to DU) DL RSTD of different TRPs.

[0304] 3. The network side (main DU) determines whether the candidate TRP meets the same flow scheduling conditions based on DL RSTD.

[0305] 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.

[0306] 5. Determine whether each TRP supports adjusting the sending time window. The basis for the determination is whether the adjustment will affect the data transmission of other users. If supported, the master DU adjusts the sending time window of each TRP according to the DL RSTD and performs the same flow scheduling; if not supported, the master DU adds the corresponding TRP to the set of TRPs for sending different flows to perform different flow scheduling.

[0307] Embodiment 2:

[0308] This embodiment is applicable to the scenario where the CU and DU are combined, or the scenario where the CU performs scheduling. The process of scheduling on the network side includes the following steps:

[0309] 1. The network side obtains the DL RSTD of different TRPs reported by the UE.

[0310] 2. The network side (CU or main DU) determines whether the candidate TRP meets the same flow scheduling conditions based on DL RSTD.

[0311] 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.

[0312] 4. Determine whether each TRP supports adjusting the sending time window. The basis for the determination is whether the adjustment will affect the data transmission of other users. If supported, the CU or main DU adjusts the sending time window of each TRP according to the DL RSTD and performs the same flow scheduling; if not supported, the CU or main DU adds the corresponding TRP to the set of TRPs for sending different flows to perform different flow scheduling.

[0313] 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.

[0314] The UE uses the TRP of the main DU as the reference TRP and performs DL RSTD measurement on the TRP of the neighboring DU. When the UE measurement result satisfies Formula 1 or Formula 2, it reports the T1 event report and fills in the measurement result of the UE DL RSTD measurement in the newly added parameter MeasResultNeighTrpss.

[0315] DL RSTD<–t1_hysteresis-t1_offset Formula 1

[0316] (Triggering to meet the time alignment difference of the joint transmission of the same stream)

[0317] DL RSTD>t1_hysteresis-t1_offset Formula 2

[0318] (Trigger does not meet the time alignment difference of the joint transmission of the same stream)

[0319] 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.

[0320] If any DL RSTD satisfies Formula 1, it means that the time difference between the TRP governed by the primary DU and the TRP governed by 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.

[0321] If the DL RSTD satisfies formula 2, it means that the time difference between the TRP governed by the primary DU and the TRP governed by the secondary DU does not meet the time alignment requirement for joint transmission of the same stream, and the UE sets the report on leave field in the event report.

[0322] After the RRC layer of the CU receives the T1 event report, if the event report reported by the UE does not have the report on leave field set, it is considered that the same stream transmission is satisfied, and the DU can be directly instructed to perform the same stream transmission; or the relevant information is sent down to the DU responsible for scheduling, and the DU decides 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 sends it to the subordinate TRP.

[0323] After the RRC layer of the CU receives the T1 event report, if the event report reported by the UE sets the report on leave field, it can instruct the main DU to schedule different stream resources for the UE. The main DU generates physical layer data and maps different streams to the TRPs under the main and auxiliary DUs. The main DU sends the physical layer data stream mapped to the TRP under the main DU to its subordinate TRPs, and the main DU sends the physical layer data stream mapped to the TRP under the auxiliary DU to the auxiliary DU, which is then sent to the subordinate TRPs.

[0324] Embodiment 4: The process of the terminal reporting an event report refers to the steps described in Embodiment 3.

[0325] After the RRC layer of the CU 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 DLRSTD to ensure that the DLRSTD 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.

[0326] Figure 5 A schematic diagram of adjusting the PDSCH transmission time window of the TRP under the secondary DU provided in the embodiment of the present application is as follows Figure 5 As shown, in the T1 time period, the UE measures and reports the event report and sets the report on leave field. In the T2 time period, the primary DU instructs the secondary DU to adjust the forwarding physical layer data time window based on the event report reported by the UE. In the T3 time period, the UE receives the PDSCH time alignment sent by each TRP to meet the requirements of jointly sending the same stream.

[0327] Figure 6 A schematic diagram of information interaction provided in an embodiment of the present application, such as Figure 6 As shown in the figure, after receiving the T1 event, the main CU passes 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).

[0328] When forwarding physical layer data to the auxiliary DU, the primary DU can notify the auxiliary DU to adjust the transmission time window. The auxiliary DU can forward the physical layer data to the TRP under the auxiliary DU according to the instruction of the primary DU and the adjusted transmission time window.

[0329] The methods and devices provided in the various embodiments of the present application 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.

[0330] Figure 7 A schematic diagram of the structure of a network device provided in an embodiment of the present application, such as Figure 7 As shown, 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 arranged physically separately.

[0331] 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.

[0332] Specifically, the transceiver 710 is used to receive and send data under the control of the processor 700 .

[0333] Among them, Figure 7 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described in this application. The bus interface provides an interface. The transceiver 710 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include a wireless channel, a wired channel, an optical cable, and other transmission media.

[0334] 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.

[0335] 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.

[0336] 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 application according to the obtained executable instructions, for example:

[0337] Determine the time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal;

[0338] Based on the time difference information, downlink data is jointly sent to the terminal.

[0339] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0340] 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 the first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

[0341] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0342] When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than the first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0343] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0344] 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.

[0345] Optionally, determining time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal includes:

[0346] 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,

[0347] 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 signal sent by the multiple network nodes under the network device reaching the terminal.

[0348] Optionally, receiving measurement information reported by the terminal includes:

[0349] The receiving terminal reports measurement information through measurement event report, media access control layer control element MAC CE or uplink control information UCI.

[0350] Optionally, the measurement information reported by the receiving terminal through the measurement event report includes:

[0351] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0352] 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.

[0353] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0354] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0355] 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.

[0356] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0357] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0358] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0359] Optionally, the method further comprises:

[0360] 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.

[0361] Optionally, the method further comprises:

[0362] The CU of the network device determines the data transmission time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0363] The CU of the network device sends the data sending time window adjustment information to the main DU of the network device.

[0364] Optionally, the method further comprises:

[0365] 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.

[0366] Optionally, 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.

[0367] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0368] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0369] Figure 8 A schematic diagram of the structure of a terminal provided in an embodiment of the present application, such as Figure 8 As shown, the terminal includes a memory 820, a transceiver 810 and a processor 800; wherein the processor 800 and the memory 820 may also be arranged physically separately.

[0370] 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.

[0371] Specifically, the transceiver 810 is used to receive and send data under the control of the processor 800 .

[0372] Among them, Figure 8 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 800 and various circuits of memory represented by memory 820 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described in this application. The bus interface provides an interface. The transceiver 810 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes 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 externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0373] 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.

[0374] The processor 800 may be a CPU, an ASIC, an FPGA or a CPLD, and the processor may also adopt a multi-core architecture.

[0375] 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 application according to the obtained executable instructions, for example:

[0376] The measurement information is reported to the network device, where the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0377] Optionally, reporting the measurement information to the network device includes:

[0378] 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.

[0379] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0380] Reporting the measurement information to the network device through an event report of the first measurement event;

[0381] 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.

[0382] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0383] When the time difference between downlink signals sent by at least two network nodes among the multiple network nodes and reaching 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;

[0384] 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.

[0385] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0386] When the time differences between downlink signals sent by multiple network nodes and arriving at the terminal are all greater than the third threshold, reporting the measurement information to the network device through the second event report of the first measurement event;

[0387] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0388] Optionally, 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.

[0389] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0390] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0391] It should be noted here that the above-mentioned network equipment and terminal provided in the embodiments of the present application 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 that are the same as those in the method embodiments will not be described in detail here.

[0392] Fig. 9 The structure diagram of the data transmission device provided in the embodiment of the present application is applied to a network device, such as Fig. 9 As shown, the device comprises:

[0393] A determination unit 900 is used to determine time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal;

[0394] The joint sending unit 910 is configured to jointly send downlink data to the terminal based on the time difference information.

[0395] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0396] 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 the first threshold, downlink data is jointly sent to the terminal in the same data stream joint transmission mode.

[0397] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0398] When the time differences of downlink signals sent by the candidate network nodes of the terminal arriving at the terminal are all greater than the first threshold, downlink data is jointly sent to the terminal using different data stream joint transmission modes.

[0399] Optionally, based on the time difference information, jointly sending downlink data to the terminal includes:

[0400] 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.

[0401] Optionally, determining time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal includes:

[0402] 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,

[0403] 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 signal sent by the multiple network nodes under the network device reaching the terminal.

[0404] Optionally, receiving measurement information reported by the terminal includes:

[0405] The receiving terminal reports measurement information through measurement event report, media access control layer control element MAC CE or uplink control information UCI.

[0406] Optionally, the measurement information reported by the receiving terminal through the measurement event report includes:

[0407] Receiving measurement information reported by the terminal through an event report of a first measurement event;

[0408] 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.

[0409] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0410] Receiving measurement information reported by the terminal through a first event report of a first measurement event;

[0411] 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.

[0412] Optionally, receiving measurement information reported by the terminal through an event report of the first measurement event includes:

[0413] Receiving measurement information reported by the terminal through a second event report of the first measurement event;

[0414] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0415] Optionally, the device further comprises:

[0416] The sending unit is used for the CU of the network device to send the time difference information to the main data unit DU of the network device.

[0417] Optionally, the determining unit 900 is further configured to:

[0418] The CU of the network device determines the data transmission time window adjustment information corresponding to the candidate network node of the terminal based on the time difference information;

[0419] The device also includes:

[0420] The sending unit is used for the CU of the network device to send the data sending time window adjustment information to the main DU of the network device.

[0421] Optionally, the device further comprises:

[0422] The sending unit is used for the main DU of the network device to send the data sending time window adjustment information to the auxiliary DU of the network device.

[0423] Optionally, 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.

[0424] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0425] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0426] Fig.10 This is a schematic diagram of the structure of the information reporting device provided in the embodiment of the present application, which is applied to a terminal, such as Fig.10 As shown, the device comprises:

[0427] The reporting unit 1000 is used to report measurement information to the network device, where the measurement information includes time difference information of downlink signals sent by multiple network nodes under the network device reaching the terminal.

[0428] Optionally, reporting the measurement information to the network device includes:

[0429] 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.

[0430] Optionally, reporting the measurement information to the network device through a measurement event report includes:

[0431] Reporting the measurement information to the network device through an event report of the first measurement event;

[0432] 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.

[0433] Optionally, 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 at least two network nodes among the multiple network nodes and reaching 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;

[0435] 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.

[0436] Optionally, reporting the measurement information to the network device through an event report of the first measurement event includes:

[0437] When the time differences between downlink signals sent by multiple network nodes and arriving at the terminal are all greater than the third threshold, reporting the measurement information to the network device through the second event report of the first measurement event;

[0438] The second event report is used to indicate that the time difference measurement result does not meet the time alignment requirement for the downlink joint transmission of the same data stream.

[0439] Optionally, 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.

[0440] Optionally, the time difference information includes downlink reference signal time difference DL RSTD information.

[0441] Optionally, the network node includes a transmission reception point TRP and / or an access point AP.

[0442] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0443] 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 application 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 to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0444] It should be noted here that the above-mentioned device provided in the embodiment of the present application 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.

[0445] On the other hand, an embodiment of the present application 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.

[0446] It should be noted here that the computer-readable storage medium provided in the embodiment of the present application 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.

[0447] 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 CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0448] The technical solution provided in the embodiment of the present application 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.

[0449] The terminal involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a 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 a 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 a "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 language and / or data with a wireless 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, and a user device, but is not limited in the embodiments of the present application.

[0450] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve 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 application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. 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 arranged geographically separately.

[0451] 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 form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0452] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0453] The present application 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 application. 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 generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0454] 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 an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0455] 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, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0456] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A data transmission method, characterized in that: Applied to network equipment, including: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The method further comprises: 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.

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

16. An information reporting method, characterized in that: Applied to terminals, including: The measurement information is reported to the network device, where the measurement information includes time difference information of downlink signals sent by a plurality of network nodes under the network device reaching the terminal.

17. The information reporting method according to claim 16, characterized in that: 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, characterized in that: 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.

19. The information reporting method according to claim 18, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The network nodes include a transmission reception point TRP and / or an access point AP.

24. A network device, characterized in that: Including memory, transceiver, 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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.

31. The network device according to claim 30, characterized in that: 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.

32. The network device according to claim 30, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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. A terminal, characterized in that: Including memory, transceiver, 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.

37. The terminal according to claim 36, characterized in that 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.

38. The terminal according to claim 37, characterized in that 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.

39. The terminal according to claim 38, characterized in that 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.

40. The terminal according to claim 38, characterized in that 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.

41. A data sending device, characterized in that: include: 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.

42. An information reporting device, characterized in that: include: 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.

43. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and the computer program is used to make a computer execute the method according to any one of claims 1 to 15.

44. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and the computer program is used to make a computer execute the method according to any one of claims 16 to 23.

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