Transmission method and apparatus, device, and readable storage medium

Abstract

The present application discloses a transmission method and apparatus, a device, and a readable storage medium. The method comprises: a terminal determines a target transmission direction and a target network-side device, the target transmission direction being a transmission direction of the terminal within a first time period, and the target network-side device comprising one or more network-side devices associated with the target transmission direction within the first time period; and the terminal performs uplink transmission or downlink transmission on the basis of the target transmission direction and the target network-side device.

Description

Transmission method, device, equipment and readable storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311144467.9 filed in China on September 6, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a transmission method, apparatus, device and readable storage medium. Background Art

[0004] In traditional cell-free networks, it is generally assumed that all network-side devices (e.g., Transmit-Receive Points (TRPs) or Access Points (APs)) in the cell-free network have the same uplink and downlink timeslot configuration. Based on the overall uplink and downlink traffic of the network, the network side uniformly configures the uplink and downlink timeslot formats for terminals (e.g., User Equipment (UE)) within the coverage area. However, the uniform configuration of uplink and downlink timeslot formats can lead to uplink or downlink signal conflicts. Therefore, how to avoid uplink and downlink signal conflicts is an urgent problem to be solved.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a transmission method, apparatus, device, and readable storage medium to solve the problem of uplink or downlink signal conflict.

[0007] In a first aspect, a transmission method is provided, comprising:

[0008] The terminal determines a target transmission direction and a target network-side device, where the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0009] The terminal performs uplink transmission or downlink transmission according to the target transmission direction and the target network side device.

[0010] In a second aspect, a transmission method is provided, including:

[0011] The fourth network-side device sends the first information or the ninth information, where the first information or the ninth information is used to determine a target transmission direction and a target network-side device; the target transmission direction is the transmission direction of the terminal within the first time, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time;

[0012] The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0013] The ninth information includes: uplink and downlink configuration information of one or more network side devices, and the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

[0014] According to a third aspect, a transmission device is provided, comprising:

[0015] a determination module, configured to determine a target transmission direction and a target network-side device, wherein the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0016] The transmission module is used to perform uplink transmission or downlink transmission according to the target transmission direction and the target network side device.

[0017] In a fourth aspect, a transmission device is provided, comprising:

[0018] a fifth sending module, configured to send first information or ninth information, where the first information or ninth information is used to determine a target transmission direction and a target network-side device; the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0019] The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0020] The ninth information includes: uplink and downlink configuration information of one or more network side devices, and the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

[0021] In a fifth aspect, a terminal is provided, comprising: a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0022] In the sixth aspect, a network side device is provided, comprising: a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the second aspect.

[0023] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by the processor of the terminal, the steps of the method described in the first aspect are implemented, or when the program or instruction is executed by the processor of the network side device, the steps of the method described in the second aspect are implemented.

[0024] In an eighth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the steps of the method described in the first aspect or the second aspect.

[0025] In a ninth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect or the second aspect.

[0026] In the tenth aspect, a communication system is provided, which includes a terminal and a network side device, the terminal is used to execute the steps of the method described in the first aspect, and the network side device is used to execute the steps of the method described in the second aspect.

[0027] In an embodiment of the present application, a terminal can determine a target transmission direction and a target network-side device. The target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period. The terminal then performs uplink transmission or downlink transmission based on the target transmission direction and the target network-side device. In this way, the terminal can meet its uplink or downlink transmission needs by connecting to target network-side devices with different uplink and downlink time configurations, thereby preventing uplink or downlink signal conflicts during the terminal's movement. As for the network-side device, since the network-side device does not need to frequently adjust the uplink and downlink time configurations of each network-side device, it can save network-side resource overhead and reduce implementation complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of a flexible duplex mode;

[0029] FIG2 is a schematic diagram of the architecture of a wireless communication system according to an embodiment of the present application;

[0030] FIG3 is a flow chart of a transmission method provided in an embodiment of the present application;

[0031] FIG4 is a flow chart of another transmission method provided in an embodiment of the present application;

[0032] FIG5 is a schematic diagram of an example of a reference signal configuration provided by an embodiment of the present application;

[0033] FIG6 is a schematic diagram of another reference signal configuration example provided in an embodiment of the present application;

[0034] FIG7 is a schematic diagram of a transmission device provided in an embodiment of the present application;

[0035] FIG8 is a schematic diagram of another transmission device provided in an embodiment of the present application;

[0036] FIG9 is a structural diagram of a terminal provided in an embodiment of the present application;

[0037] FIG10 is a structural diagram of a network-side device provided in an embodiment of the present application;

[0038] FIG11 is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0040] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0041] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0042] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in this application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR system applications, such as 6th generation (6G) systems. thGeneration, 6G) communication system.

[0043] In order to better understand the embodiments of this application, the following technical points are first introduced:

[0044] 1. About Cell-free networks:

[0045] The cell-free massive Multiple-Input Multiple-Output (MIMO) system breaks the concept of cells in traditional massive MIMO systems. Instead of being deployed at the same macro base station, a large number of antennas are distributed over a wide area. UEs are also dispersed over this wide area. These antennas are called Transmitter Relays (TRPs) or Access Points (APs). In theory, each UE can communicate with every TRP. With the help of the fronthaul network and the Central Processing Unit (CPU), a large number of geographically dispersed TRPs or APs can jointly serve a smaller number of UEs. The CPU uses channel statistics for joint detection. It is expected to be applied to next-generation indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses.

[0046] Traditional deployment of multiple TRP networks usually adopts the time-division duplex (TDD) mode, and assumes that the uplink and downlink time slot configurations of each TRP in the network are the same. The network side will determine the uplink and downlink time slot configuration parameters based on the overall uplink and downlink traffic requirements in the entire Cell-free network.

[0047] 2. Regarding sub-band full duplex (SBFD) on the network side.

[0048] One flexible duplexing scheme currently under discussion for New Radio (NR) is: non-overlapping sub-band full-duplex, where uplink and downlink transmissions can occur simultaneously at different frequency locations at the same time. To prevent interference between uplink and downlink, a guard interval (Guard Band) is provided between the frequency locations corresponding to different transmission directions (corresponding to the duplex sub-bands); and terminal-side half-duplex, which, consistent with TDD, allows only uplink or downlink transmissions at the same time, not both. Understandably, in this duplexing scheme, network-side equipment can only perform uplink and downlink transmissions for different terminals at the same time, meaning the terminals still operate in half-duplex mode.

[0049] Figure 1 illustrates a flexible duplexing scheme. Within a portion of downlink symbols, the network equipment semi-statically divides the frequency domain of a single carrier into three duplex subbands. Downlink subbands are located on either side of the carrier, while the center is used for uplink duplexing. This reduces interference with adjacent carriers. In the third time slot, UE1 and UE2 transmit in uplink and receive in downlink, respectively, in half-duplex mode.

[0050] In related technologies, sub-band full-duplex assumes that the uplink and downlink use different sub-bands of a carrier in the same time period; a full-duplex cell-free network assumes that different TRPs operate on the same sub-band / frequency resources.

[0051] 3. About NR TDD parameter configuration.

[0052] (1) Static TDD configuration:

[0053] In the fifth generation mobile communication technology (5G) or NR, the 3rd Generation Partnership Project (3GPP) introduced several parameters to achieve more flexible "uplink and downlink subframe ratio" through parameter settings. High-layer signaling provides TDD-UL-DL-configcommon through System Information Block (SIB) 1 or ServingCellConfigCommon, which contains dedicated configuration time for uplink (UL), downlink (DL), or flexible. TDD-UL-DL-configcommon includes the following parameters:

[0054] (a) Reference Subcarrier Spacing: For dynamic TDD configuration, the Slot Format Indication (SFI) - Radio Network Temporary Identity (RNTI) scheduled by the Downlink Control Information (DCI) will use the reference subcarrier spacing (SubCarrier Spacing) to calculate the duration of the scheduled timeslot.

[0055] (b) Downlink and Uplink Transmission Periodicity (dl-UL-TransmissionPeriodicity): This defines the periodicity of the DL-UL transmission model, for example, 0.5ms, 0.625ms, 1ms, 1.25ms, 2ms, 2.5ms, 5ms, and 10ms. This means that before defining the number of time slots occupied by the DL or UL, the total time range occupied by the DL or UL is first defined. Based on this, the number of time slots occupied by the UL or DL ​​is then defined.

[0056] (c) Downlink transmission time slots (nrofDownlinkSlots): defines how many time slots DL occupies within the entire dl-UL-TransmissionPeriodicity.

[0057] (d) Uplink transmission time slots (nrofUplinkSlots): defines how many time slots DL occupies within the entire dl-UL-TransmissionPeriodicity.

[0058] (e) Uplink transmission symbols (nrofUplinkSymbols): defines how many symbols UL occupies within the entire dl-UL-TransmissionPeriodicity.

[0059] (f) Downlink transmission symbols (nrofDownlinkSymbols): defines how many symbols DL occupies within the entire dl-UL-TransmissionPeriodicity.

[0060] (2) Semi-static TDD configuration:

[0061] As mentioned above, TDD-UL-DL-ConfigCommon can configure a certain number of UL and DL time slots in a period of time. Therefore, the remaining time slots in each time period can be considered flexible. With the help of TDD-UL-DL-ConfigDedicated, the network can configure these flexible time slots for specific terminals. TDD-UL-DL-ConfigDedicated contains a set of time slot configurations, where each time slot configuration corresponds to an index. This time slot configuration can be in the form of all DL (D), all UL (U), or flexible DL or UL (F). If it is all DL or UL, all 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols in this time slot are unidirectional. If it is a flexible configuration, there is a nrofDownlinkSymbols parameter indicating the number of downlink symbols in the time slot, and a nrofUplinkSymbols parameter indicating the number of uplink symbols in the time slot.

[0062] Semi-static TDD configuration is an approach that allows a degree of flexibility in UL or DL ​​TDD allocation, with the benefit that the configuration can be UE-specific, enabling traffic adaptation.

[0063] (3) Dynamic TDD configuration:

[0064] Dynamic TDD is only valid for flexible time slots in the public configuration. If a time slot is not configured, it is considered flexible, enabling a dynamic TDD system. Using DCI format 2_0 scheduling, dynamic TDD configuration can be implemented in a short period of time. This DCI message carries a cyclic redundancy check (CRC), is encrypted with the SFI-RNTI, and may be sent to a group of terminals to notify the time slot format (slot-format) of TDD operation.

[0065] FIG2 shows a block diagram of a wireless communication system applicable to embodiments of the present application. The wireless communication system includes a terminal 21 and a network-side device 22 .

[0066] The terminal 21 may be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipborne equipment, pedestrian user equipment (PUE), smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM or self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. In addition to the above-mentioned terminal devices, the terminal involved in this application can also be a chip within the terminal, such as a modem chip or a system-on-chip (SoC). It should be noted that the specific type of the terminal 21 is not limited in the embodiments of this application.

[0067] The network-side device 22 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS), or a wireless fidelity (WiFi) node. The base station can be referred to as a Node B (NB), an evolved Node B (eNB), the next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a TRP, or other appropriate terms in the art. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0068] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access and mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data storage (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0069] The transmission method, apparatus, communication device, and readable storage medium provided in the embodiments of the present application are described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0070] 3 , an embodiment of the present application provides a transmission method, which is applied to a terminal. The method includes step 301 and step 302 .

[0071] Step 301: The terminal determines a target transmission direction and a target network-side device, where the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period.

[0072] The above-mentioned association with the uplink transmission or downlink transmission of the terminal refers to the uplink transmission or downlink transmission of the participating terminal, that is, the target network side device includes one or more network side devices that participate in the uplink transmission or downlink transmission of the terminal within the first time, and the network side device includes but is not limited to at least one of the base station, TRP, AP cluster, etc.

[0073] Optionally, different network-side devices have different uplink and downlink time configurations.

[0074] Optionally, the transmission direction includes at least one of uplink transmission, downlink transmission, and flexible transmission.

[0075] Optionally, the unit of the time length of the first time is a frame, a subframe, a time slot or an orthogonal frequency division multiplex (OFDM) symbol.

[0076] Step 302: The terminal performs uplink transmission or downlink transmission according to the target transmission direction and the target network-side device.

[0077] In this embodiment, the terminal can determine a connection relationship with a network-side device having different uplink and downlink time configurations within a first time period to meet the terminal's uplink or downlink transmission requirements. For example, the terminal determines that the uplink and downlink time configuration corresponding to the uplink or downlink transmission requirements within the first time period is DDSUU, i.e., the target transmission direction of the first and second time units (downlink time slots) of the first time period is downlink transmission, the target transmission direction of the third time unit (special time slot) of the first time period is flexible transmission, and the target transmission direction of the fourth and fifth time units (uplink time slots) of the first time period is uplink transmission. The target network-side devices include a first network-side device and a second network-side device, wherein the uplink and downlink time configuration of the first network-side device is different from the uplink and downlink time configuration of the second network-side device, the uplink and downlink time configuration of the first network-side device is DDDSU, and the uplink and downlink time configuration of the second network-side device is DSUUU. The terminal determines that the first three time units within the first time period communicate with the first network-side device for downlink data transmission, and communicate with the second network-side device for uplink data transmission in the last two time units within the first time period, as shown in FIG5 , where TRP1 represents the first network-side device and TRP2 represents the second network-side device.

[0078] In one embodiment of the present application, the target network side device includes at least one of the following: a first network side device, a second network side device, and the terminal performs uplink transmission or downlink transmission according to the target transmission direction and the target network side device, including at least one of the following:

[0079] The terminal receives a downlink signal sent by a first network-side device within the first time, where the downlink signal is quasi-co-located with a reference signal of the first network-side device;

[0080] The terminal sends an uplink signal to the second network side device within the first time, and the transmission beam of the uplink signal corresponds to the reception beam of the reference signal of the second network side device.

[0081] Optionally, the information of the transmitted beam or the received beam may include at least one of the following: beam identification information, spatial relation information, spatial domain transmission filter information, spatial domain reception filter information, spatial domain filter information, transmission configuration indication status information, and quasi-colocation (QCL) information.

[0082] In one embodiment of the present application, the terminal determines the target transmission direction and the target network-side device, including:

[0083] The terminal receives first information, where the first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0084] The terminal determines the target transmission direction and the target network-side device according to the first information.

[0085] For example, uplink and downlink time configuration information includes but is not limited to uplink and downlink time slot configuration periods, and uplink and downlink time configuration parameters include but are not limited to uplink and downlink time slot configuration parameters, where uplink and downlink include uplink or downlink.

[0086] In this embodiment, the network side can directly configure the first information for the terminal. Since the network side does not need to frequently adjust the uplink and downlink time configuration of each network side device, it can save network side resource overhead and reduce implementation complexity, so that more network resources can be used for interference measurement, joint optimization and transmission control, etc.

[0087] In one embodiment of the present application, when the first information includes at least the association information of the target network side device, the terminal determines the target transmission direction and the target network side device according to the first information, including:

[0088] The terminal determines the target network side device according to the associated information of the target network side device;

[0089] During the first time, if the terminal is configured for flexible transmission and the target network side device is for downlink transmission or uplink transmission, the terminal determines that the target transmission direction is consistent with the transmission direction of the target network side device. For example, if the target network side device is for downlink transmission (that is, the downlink transmission of the target network side device is used for the target network side device to send downlink data to the terminal), the target transmission direction of the terminal is downlink transmission (that is, the downlink transmission of the terminal is used for the terminal to receive downlink data sent by the target network side device); if the target network side device is for uplink transmission (that is, the uplink transmission of the target network side device is used for the target network side device to receive uplink data sent by the terminal), the target transmission direction of the terminal is uplink transmission (that is, the uplink transmission of the terminal is used for the terminal to send uplink data to the target network side device).

[0090] In one embodiment of the present application, when the first information includes at least the association information of the target network side device, the terminal determines the target transmission direction and the target network side device according to the first information, including one of the following:

[0091] The terminal determines the target network side device according to the associated information of the target network side device;

[0092] During the first time, if the terminal is configured for flexible transmission and the target network side device is flexible transmission, the terminal autonomously determines the target transmission direction, or the target transmission direction is consistent with the transmission direction of the terminal during the second time, and the second time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, optionally, the default direction is downlink transmission.

[0093] Optionally, the unit of the time length of the second time is a frame, a subframe, a time slot or an OFDM symbol.

[0094] In one embodiment of the present application, when the first information does not include the association information of the target network side device, the terminal determines the target transmission direction and the target network side device according to the first information, including:

[0095] The terminal determines a target transmission direction and a target network-side device according to a first predefined rule.

[0096] In one embodiment of the present application, the target transmission direction and the target network-side device determined by the first predefined rule are not used for data transmission. That is, the terminal may not perform data transmission within the first time.

[0097] In one embodiment of the present application, the first predefined rule includes:

[0098] The target network-side device includes the network-side device to which the terminal initially accessed most recently, and the target transmission direction is determined according to uplink and downlink time configuration parameters of the terminal.

[0099] In one embodiment of the present application, the first predefined rule includes:

[0100] If the terminal is in flexible transmission within the first time, the target network side device includes at least one of the following:

[0101] (1) The network-side device with the highest channel quality or higher than a first preset value;

[0102] Optionally, the channel quality includes at least one of the reference signal received power (RSRP) of the downlink reference signal, the reference signal received quality (RSRQ), the signal to noise ratio (SNR), the signal to interference and noise ratio (SINR), and the signal to interference ratio (SIR).

[0103] Optionally, the first preset value may be a value agreed upon in a protocol, which is not specifically limited in this embodiment.

[0104] (2) a network-side device associated with the uplink or downlink transmission of the terminal within a third time, wherein the third time is a time before the first time within the uplink and downlink time configuration period, i.e., the target network-side device is a network-side device that participated in the terminal transmission within a time before the first time;

[0105] Optionally, the unit of the time length of the third time is a frame, a subframe, a time slot or an OFDM symbol.

[0106] (3) Downlink or uplink network side device, that is, the target network side device is a network side device with a clear transmission direction;

[0107] If the target network side device is performing uplink transmission or downlink transmission within the first time, the target transmission direction of the terminal is consistent with the transmission direction of the target network side device.

[0108] In one embodiment of the present application, the first predefined rule includes:

[0109] If the target network side device includes a flexible transmission time within the first time, the target transmission direction is determined autonomously by the terminal within the flexible transmission time, or the target transmission direction is consistent with the transmission direction of the terminal within a fourth time, and the fourth time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, for example, the default direction is downlink transmission.

[0110] Optionally, the unit of the time length of the fourth time is a frame, a subframe, a time slot or an OFDM symbol.

[0111] In one embodiment of the present application, the first predefined rule includes:

[0112] If the target transmission direction is uplink transmission or downlink transmission, the target network side device is determined from a third network side device, wherein the transmission direction of the third network side device is consistent with the target transmission direction within the first time, or the third network side device is flexible transmission, and the target network side device includes at least one of the following:

[0113] (1) The network-side device with the highest channel quality or higher than a second preset value;

[0114] Optionally, the channel quality includes at least one of RSRP, RSRQ, SNR, SINR, and SIR.

[0115] Optionally, the second preset value may be a value agreed upon in a protocol, which is not specifically limited in this embodiment.

[0116] (2) the network-side device to which the terminal last initially accessed;

[0117] (3) a network-side device associated with the uplink transmission or downlink transmission of the terminal within a fifth time period, the fifth time period being a time period before the first time period within the uplink and downlink time configuration period;

[0118] Optionally, the unit of the time length of the fifth time is a frame, a subframe, a time slot or an OFDM symbol.

[0119] (4) A network-side device for downlink or uplink transmission, that is, a target network-side device is a network-side device with a clear transmission direction.

[0120] In one embodiment of the present application, when the terminal autonomously determines the target transmission direction, the method further includes:

[0121] The terminal sends second information to the target network-side device, where the second information includes: a target transmission direction of the terminal within the first time.

[0122] In one embodiment of the present application, before the terminal receives the first information, the method further includes:

[0123] The terminal sends third information to a fourth network-side device, where the third information is used to determine the first information (the network-side device determines the first information based on the third information);

[0124] The third information includes at least one of the following:

[0125] (1) fourth information, the fourth information being used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0126] (2) Fifth information, the fifth information is used to indicate the first information recommended by the terminal.

[0127] That is, the terminal can send its recommended first information to the network side device, and the network side device can refer to the first information recommended by the terminal when configuring the first information for the terminal, or the network side device can ignore the first information recommended by the terminal when configuring the first information for the terminal.

[0128] In one embodiment of the present application, before the terminal receives the first information, the method further includes:

[0129] The terminal sends sixth information, where the sixth information is used to determine the first information and a sixth time (i.e., the network-side device determines the first information and the sixth time based on the sixth information), and the sixth time is used to indicate a valid time of the first information;

[0130] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0131] That is, the seventh time may be used to indicate the duration (or valid time) of the uplink transmission or downlink transmission requirement of the terminal, that is, the uplink transmission or downlink transmission requirement of the terminal is valid within the duration.

[0132] Alternatively, the seventh time may be used to indicate the duration of the first information recommended by the terminal, that is, the first information recommended by the terminal is valid within the duration.

[0133] In this embodiment, the terminal reports its temporary uplink transmission or downlink transmission requirement to the network side.

[0134] In one embodiment of the present application, the third information includes the fourth information, and before the terminal sends the third information, the method further includes:

[0135] One or more synchronization signals are selected according to the fourth information to initiate random access.

[0136] In one embodiment of the present application, the uplink transmission or downlink transmission requirement of the terminal includes at least one of the following:

[0137] (1) Uplink and downlink time configuration requirements;

[0138] For example, the uplink and downlink time configuration requirement refers to the uplink or downlink transmission requirement of the UE at different times. For example, the uplink and downlink time configuration requirement includes at least one of the uplink and downlink time configuration period, the uplink time length, the downlink time length, the order in which the uplink and downlink occur, etc. It is understood that the time length can be expressed in units of length such as radio frames, subframes, time slots, and OFDM symbols.

[0139] (2) The ratio of uplink to downlink transmission time;

[0140] For example, the ratio of uplink to downlink transmission time can be expressed by uplink or downlink and a numerical value. For example, DL 0.4 means that the downlink transmission time accounts for 40% of the uplink and downlink time slot cycle, and correspondingly, the uplink transmission time accounts for 60% of the cycle;

[0141] (3) Quality of Service (QoS) requirements.

[0142] For example, the quality of service requirements include but are not limited to uplink and downlink data rate requirements.

[0143] In one embodiment of the present application, the uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length;

[0144] In one embodiment of the present application, the associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in uplink transmission or downlink transmission, the start time of the target network side device participating in uplink transmission or downlink transmission, and the reference signal corresponding to the target network side device.

[0145] In one embodiment of the present application, the method further includes:

[0146] The terminal receives eighth information, where the eighth information is used to indicate a correspondence between downlink transmission or uplink transmission and a reference signal at different times within an uplink and downlink time configuration period, and the reference signal is used to determine channel quality between the terminal and different network-side devices.

[0147] In one embodiment of the present application, the terminal determines the target transmission direction and the target network-side device, including:

[0148] The terminal receives ninth information, where the ninth information includes: uplink and downlink configuration information of one or more network-side devices, where the uplink and downlink configuration information includes at least one of the following: an uplink and downlink time configuration period, a downlink transmission time length within each of the uplink and downlink time configuration periods, an uplink transmission time length within each of the uplink and downlink time configuration periods, and a flexible transmission time length within each of the uplink and downlink time configuration periods;

[0149] The terminal determines the target transmission direction and the target network-side device according to the ninth information.

[0150] Optionally, the unit of the downlink transmission time length, the uplink transmission time length or the flexible transmission time length is a frame, a subframe, a time slot or an OFDM symbol.

[0151] In one embodiment of the present application, the ninth information includes: the uplink and downlink configuration information of the first network side device, the uplink and downlink configuration information of the second network side device, and the uplink and downlink configuration information of the first network side device is different from the uplink and downlink configuration information of the second network side device within the first time.

[0152] In one embodiment of the present application, the terminal determines the target transmission direction and the target network-side device according to the ninth information, including:

[0153] If it is determined according to the ninth information that the transmission modes of the multiple network-side devices associated with the terminal during the first time are different, or the first time includes a time for flexible transmission, the terminal determines the target transmission direction and the target network-side device according to the tenth information;

[0154] The tenth information includes the uplink transmission or downlink transmission requirement of the terminal.

[0155] Optionally, the transmission mode includes at least one of uplink transmission, downlink transmission, and duplex transmission. Different transmission modes include different transmission directions of multiple network-side devices, or different frequency domain positions of multiple network-side devices in the same transmission direction.

[0156] In one embodiment of the present application, the terminal determines the target transmission direction and the target network-side device according to the ninth information, including:

[0157] If it is determined according to the ninth information that the transmission modes of the plurality of network-side devices associated with the terminal within the first time are different, or the first time includes a time for flexible transmission, the terminal receives the eleventh information sent by the fifth network-side device;

[0158] The terminal determines the target transmission direction and the target network-side device according to the eleventh information;

[0159] The eleventh information is used to indicate the target transmission direction and the target network-side device, and the fifth network-side device is a downlink network-side device.

[0160] In one embodiment of the present application, after the terminal determines the target transmission direction and the target network-side device according to the ninth information, the tenth information, or the eleventh information, the method further includes:

[0161] The terminal sends twelfth information to the target network side device, where the twelfth information includes at least one of the target transmission direction and information of the target network side device.

[0162] In an embodiment of the present application, a terminal can determine a target transmission direction and a target network-side device. The target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period. The terminal then performs uplink transmission or downlink transmission based on the target transmission direction and the target network-side device. In this way, the terminal can meet its uplink or downlink transmission needs by connecting to target network-side devices with different uplink and downlink time configurations, thereby preventing uplink or downlink signal conflicts during the terminal's movement. As for the network-side device, since the network-side device does not need to frequently adjust the uplink and downlink time configurations of each network-side device, it can save network-side resource overhead and reduce implementation complexity.

[0163] It is understandable that reserving more network resources can further enable more comprehensive interference measurement, joint optimization and transmission control. For example, there will be cross-link interference (CLI) between different TRPs, that is, the TRP in the downlink transmission time slot will cause cross-link interference between TRPs to the TRP in the uplink transmission time slot at the same time, and the UE in the uplink transmission time slot will cause cross-link interference between UEs to the UE in the downlink transmission time slot at the same time. However, considering that the CPU in the Cell-free network can control each TRP to achieve more accurate CLI measurement, and by optimizing the UE-TRP connection relationship and network-side beamforming, the impact of CLI is effectively reduced. In addition, for the interference problem between TRPs, such as the interference of TRP1 to TRP2, the base station determines the content of the downlink signal of TRP1. TRP2 receives the downlink signal of TRP1 and can estimate the interference channel between TRP1 and TRP2 through the reference signals such as DMRS carried therein. Through baseband signal processing, the interference of TRP1 downlink signal is eliminated from the received signal of TRP2.

[0164] 4 , an embodiment of the present application provides a transmission method, which is applied to a fourth network-side device, and the specific steps include step 401 .

[0165] Step 401: The fourth network-side device sends first information or ninth information, where the first information or ninth information is used to determine a target transmission direction and a target network-side device; the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0166] It can be understood that the terminal determines the target transmission direction and the target network-side device based on the received first information or ninth information.

[0167] The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0168] The ninth information includes: uplink and downlink configuration information of one or more network side devices, and the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

[0169] In one embodiment of the present application, the time length of the first time is a frame, a subframe, a time slot, or an OFDM symbol.

[0170] In one embodiment of the present application, the target network side device includes at least one of the following: a first network side device, a second network side device, and the first information or the ninth information is used to indicate that a downlink signal sent by the first network side device is received within the first time, and the downlink signal is quasi-co-located with a reference signal of the first network side device; or to indicate that an uplink signal is sent to the second network side device within the first time, and the transmission beam of the uplink signal corresponds to the reception beam of the reference signal of the second network side device.

[0171] In one embodiment of the present application, the uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length.

[0172] Optionally, the unit of the downlink transmission time length, the uplink transmission time length or the flexible transmission time length is a frame, a subframe, a time slot or an OFDM symbol.

[0173] In one embodiment of the present application, the associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in uplink transmission or downlink transmission, the start time of the target network side device participating in uplink transmission or downlink transmission, and the reference signal corresponding to the target network side device.

[0174] In one embodiment of the present application, the method further includes:

[0175] The fourth network side device sends seventh information, where the seventh information is used to indicate the correspondence between downlink transmission or uplink transmission and a reference signal at different times within the uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

[0176] In one embodiment of the present application, the fourth network-side device sends the first information, including:

[0177] The fourth network side device receives the third information;

[0178] The fourth network-side device determines the first information according to the third information, and sends the first information;

[0179] The third information includes at least one of the following:

[0180] (1) fourth information, the fourth information being used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0181] (2) Fifth information, the fifth information is used to indicate the first information recommended by the terminal.

[0182] In one embodiment of the present application, the fourth network-side device sends the first information, including:

[0183] The fourth network side device receives sixth information;

[0184] The fourth network-side device determines the first information and the sixth time according to the sixth information, and sends the first information and the sixth time, where the sixth time is used to indicate the effective time of the first information;

[0185] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0186] In one embodiment of the present application, after sending the ninth information, the method further includes:

[0187] The fourth network-side device receives twelfth information sent by the terminal, where the twelfth information includes at least one of the target transmission direction and information of the target network-side device.

[0188] In one embodiment of the present application, the unit of the time length of the sixth time or the time length of the seventh time is a frame, a subframe, a time slot, or an OFDM symbol.

[0189] In an embodiment of the present application, the fourth network-side device sends the first information or the ninth information, and the first information or the ninth information is used to configure the terminal to determine the target transmission direction and the target network-side device; the target transmission direction is the transmission direction of the terminal within the first time, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time. In this way, the terminal can meet the terminal's uplink transmission or downlink transmission needs by connecting to target network-side devices with different uplink and downlink time configurations, which can prevent uplink signal or downlink signal conflicts during the terminal's movement. For the network-side device, because the network-side device does not need to frequently adjust the uplink and downlink time configurations of each network-side device, it can save network-side resource overhead and reduce implementation complexity.

[0190] Furthermore, reserving more network resources can enable more comprehensive interference measurement, joint optimization, and transmission control. For example, there will be cross-link interference (CLI) between different TRPs, that is, the TRP in the downlink transmission time slot will cause cross-link interference between TRPs to the TRP in the uplink transmission time slot at the same time, and the UE in the uplink transmission time slot will cause cross-link interference between UEs to the UE in the downlink transmission time slot at the same time. However, considering that the CPU in the Cell-free network can control each TRP to achieve more accurate CLI measurement, and by optimizing the UE-TRP connection relationship and network-side beamforming, the impact of CLI is effectively reduced. In addition, for the interference problem between TRPs, such as the interference of TRP1 to TRP2, the base station determines the content of the downlink signal of TRP1. TRP2 receives the downlink signal of TRP1 and can estimate the interference channel between TRP1 and TRP2 through the reference signals such as DMRS carried therein. Through baseband signal processing, the interference of TRP1 downlink signal is eliminated from the received signal of TRP2.

[0191] The following describes the implementation of the present application in conjunction with Examples 1 to 5.

[0192] Embodiment 1: The network side performs a TDD timeslot format configuration process for the UE.

[0193] Step 1: The network side device sends a downlink reference signal (RS), and the UE receives and measures the downlink reference signal to determine the channel quality between the terminal and different network side devices; the downlink reference signal includes but is not limited to at least one of the synchronization signal (Synchronization Signal and PBCH block, SSB), channel state information reference signal (CSI-RS), tracking reference signal (TRS), demodulation reference signal (DMRS), etc.

[0194] Alternatively, the network side device configures the terminal to send an uplink reference signal, and the network side device measures the uplink reference signal to determine the signal quality between the terminal and different network side devices. The uplink reference signal includes but is not limited to at least one of a sounding reference signal (SRS), a physical random access channel (PRACH), etc.

[0195] It can be understood that the downlink reference signals are downlink reference signals respectively sent by multiple network-side devices, and the terminal's measurement results of the multiple downlink reference signals respectively represent the signal quality between the multiple network-side devices and the UE.

[0196] In a cell-free network, network-side devices may consist of multiple TRPs or AP clusters. Based on the approximate location of the terminal, the network can select several TRPs or AP clusters from the cell-free network's TRP or AP cluster set as candidate TRPs or AP clusters to serve the terminal. Therefore, the channel quality between the terminal and the candidate TRPs or AP clusters is determined through downlink or uplink reference signal measurements.

[0197] Step 2: The UE feeds back the downlink reference signal measurement result to the network side device;

[0198] It can be understood that the above measurement results may be measurement results of layer 1 or layer 3.

[0199] Step 3: The UE reports its uplink or downlink transmission requirements to the network side device;

[0200] Optionally, the uplink transmission or downlink transmission requirement of the UE includes at least one of the following: uplink and downlink time configuration requirement of the UE, a ratio of uplink and downlink transmission time, and QoS requirement.

[0201] For example, the uplink and downlink time configuration requirement refers to the uplink or downlink transmission requirement of the UE at different times. For example, the uplink and downlink time configuration requirement includes at least one of the uplink and downlink time configuration period, the uplink time length, the downlink time length, the order in which the uplink and downlink occur, etc. It will be understood that the unit of time length can be expressed in terms of length units such as radio frames, subframes, time slots, or OFDM symbols.

[0202] For example, the ratio of uplink to downlink transmission time can be expressed by uplink or downlink and a numerical value. For example, DL 0.4 means that the downlink transmission time accounts for 40% of the uplink and downlink time slot cycle, and correspondingly, the uplink transmission time accounts for 60% of the cycle;

[0203] For example, QoS requirements include but are not limited to uplink and downlink data rate requirements.

[0204] Step 4: The network side device configures at least one of the UE's uplink and downlink time configuration period, the terminal's uplink and downlink time configuration parameters, and the association information of the target network side device for the UE.

[0205] The uplink and downlink time configuration parameters include at least one of a downlink transmission time length, an uplink transmission time length, and a flexible transmission time length in each uplink and downlink time configuration period.

[0206] The associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in the transmission, the start time of the target network side device participating in the transmission (for example, the offset relative to the start boundary of the cycle within an uplink and downlink time configuration cycle), and the reference signal corresponding to the target network side device.

[0207] Step 5: The terminal determines the target transmission direction and the target network side device according to at least one of the terminal's uplink and downlink time configuration period, the terminal's uplink and downlink time configuration parameters, and the associated information of the target network side device.

[0208] Scenario 1: The network-side device configures the associated information of the target network-side device.

[0209] Within the first time of an uplink and downlink time configuration period, if the UE is configured for flexible transmission and the target network side device is for downlink transmission or uplink transmission, then the transmission direction of the UE is consistent with the transmission direction of the target network side device; if the UE is for downlink transmission or uplink transmission and the target network side device is for flexible transmission (uplink or downlink), then the transmission direction of the target network side device is consistent with the transmission direction of the UE; if both the UE and the target network side device are flexible transmission, then the UE determines the transmission direction based on the implementation and reports it to the network, or the target transmission direction is consistent with the transmission direction of the terminal within the second time, and the second time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, optionally, the default direction is downlink transmission.

[0210] Scenario 2: The network-side device is not configured with the association information of the target network-side device.

[0211] The terminal determines the target transmission direction and the target network-side device according to the first predefined rule.

[0212] In mode 1, the terminal determines a target transmission direction and a target network-side device that are not used for data transmission according to a first predefined rule.

[0213] In mode 2, the terminal determines the network side device that was initially accessed most recently as the target network side device according to the first predefined rule, and the target transmission direction is determined according to the uplink and downlink time configuration parameters of the terminal.

[0214] Method 3: If the UE is flexibly transmitting within the first time, the target network side device is determined according to the first predefined rule, for example, the RSRP, RSRQ, SNR, SINR or SIR of the target network side device is the highest or higher than the first preset value; or, the target network side device is the network side device to which the UE last initially accessed; or, the network side device associated with the uplink transmission or downlink transmission of the terminal within a third time, and the third time is the time before the first time within the uplink and downlink time configuration period; or, the network side device for downlink transmission or uplink transmission, that is, the network side device with a clear transmission direction, wherein, if the target network side device is uplink transmission or downlink transmission within the first time, the target transmission direction of the terminal is consistent with the transmission direction of the target network side device.

[0215] Method 4: If the target network side device includes a flexible transmission time within the first time, the target transmission direction is determined autonomously by the terminal within the flexible transmission time, or the target transmission direction is consistent with the transmission direction of the terminal within a fourth time, and the fourth time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, for example, the default direction is downlink transmission.

[0216] Method 5: If the UE is transmitting uplink or downlink within the first time, then among the third network side devices that have the same transmission direction as the UE or flexibly transmit within the first time, the target network side device is determined according to the first predefined rule, for example, the RSRP, RSRQ, SNR, SINR or SIR of the target network side device is the highest or higher than the second preset value; or, the target network side device is the network side device to which the UE last initially accessed; or, the network side device associated with the uplink transmission or downlink transmission of the terminal within the fifth time, the fifth time being the time before the first time within the uplink and downlink time configuration period; or, the network side device for downlink transmission or uplink transmission, that is, the network side device with a clear transmission direction.

[0217] Optionally, the method may further include:

[0218] The terminal receives the eighth information, and the eighth information is used to indicate the downlink transmission at different times within the uplink and downlink time configuration period or the correspondence between the uplink transmission and the reference signal (the downlink transmission and the downlink reference signal satisfy a quasi-co-location relationship, and the uplink transmission and the downlink reference signal satisfy the same spatial domain beam characteristics). It can be understood that the reference signal is the reference signal measured in step 1, and different reference signals correspond to communication between the UE and the corresponding network side device.

[0219] Configuration example:

[0220] Method 1: The network-side device separately configures the uplink and downlink time configuration period, uplink and downlink time configuration parameters (for example, downlink transmission time length, uplink transmission time length, flexible transmission time length), and association information of the target network-side device (for example, TRP_i association start time and time length, TRP_j association start time and time length. It can be understood that TRP_i and TRP_j reuse the period parameters of the uplink and downlink time configuration parameters). At any time, the terminal determines the transmission direction (uplink transmission, downlink transmission, or flexible transmission) according to the uplink and downlink time configuration parameters, and determines the target network-side device participating in the communication according to the association information of the target network-side device.

[0221] Method 2: The network-side device jointly configures the uplink and downlink time configuration and the associated information of the target network-side device. For example, the network-side device configures the uplink and downlink time configuration period and several parameter combinations for the terminal (the parameter combination includes at least one of the transmission direction, starting time point, time length, and target network-side device). If the starting time point is not defined, the end time point corresponding to the previous parameter combination is used as the starting time point corresponding to the next parameter combination (that is, the start time of the previous parameter combination plus the time length is obtained to obtain the starting time point corresponding to the next parameter combination). The first parameter combination starts from the starting boundary of the uplink and downlink time configuration period.

[0222] Method 3: The network-side device only configures the association information of the target network-side device. The terminal obtains the uplink and downlink time configuration period and the uplink and downlink time configuration information of each target network-side device through high-layer information. The terminal obtains the association information of the target network-side device (for example, the association start time and duration of TRP_i, and the association start time and duration of TRP_j). At any time, the terminal determines the terminal's transmission direction based on the transmission direction of the currently associated target network-side device or the default rule.

[0223] Method 4: The network-side device updates the association information of the target network-side device in the default association state. The terminal determines the initial uplink and downlink time configuration parameters and the target network-side device according to the default rules or network configuration information (for example, according to the default rules, the network-side device and the corresponding uplink and downlink time configuration parameters corresponding to the most recent random access. For another example, based on the terminal's mobility, the network display indicates the associated target network-side device and the corresponding uplink and downlink time configuration parameters). The network updates the target network-side device or transmission direction associated with a certain time period in the uplink and downlink time configuration cycle.

[0224] Method 5: Configure the target network-side device association relationship based on the granularity of the uplink and downlink time configuration period. For example, odd-numbered periods are associated with TRP_i, and even-numbered periods are associated with TRP_j.

[0225] After determining the transmission direction and the target network-side device, the terminal communicates with the target network-side device: for uplink transmission, the spatial filtering parameters of the terminal's uplink signal correspond to the receiving spatial filtering parameters of the downlink reference signal corresponding to the target network-side device; for downlink transmission, the terminal's downlink signal reception parameters ensure quasi-co-location with the downlink reference signal corresponding to the target network-side device.

[0226] The following describes an example of reference signal configuration corresponding to the target network-side device participating in the transmission:

[0227] The network side can directly configure the mapping relationship between different times and downlink reference signal sets for the UE; for example, as shown in Figure 5, the network side configures the first three time units in the first time of the UE to be mapped to RS#1, and the last two time units to be mapped to RS#2; or, for example, as shown in Figure 6, the network side configures the first three time units in the first time of the UE to be mapped to RS#1, and the last two time units to be mapped to {RS#2, RS#3}, that is, the TRP corresponding to RS#2 and RS#3 in the last two time units can realize joint coherent transmission, and the transmission direction is consistent, and can serve the UE together.

[0228] Embodiment 2: Based on downlink measurement, the UE recommends a TDD timeslot format configuration process.

[0229] Step 1: The network-side device sends a downlink reference signal, and the UE receives and measures the downlink reference signal to determine the channel quality between the terminal and different network-side devices. The downlink reference signal includes at least one of SSB, CSI-RS, TRS, DMRS, etc.

[0230] Step 2: The network side device configures the mapping relationship between different downlink reference signals and uplink and downlink TDD time slot formats for the UE;

[0231] For example, the network-side device configures RS#1 to be mapped to TDD time slot format 1 - DDDSU, and configures RS#2 to be mapped to TDD time slot format 2 - DSUUU. In existing protocols, the TDD time slot format may include TDD-UL-DL-ConfigDedicated related parameters (such as the time slot format (Slot-format) identifier) ​​or TDD-UL-DL-configcommon related parameters;

[0232] Step 3: The UE sends third information to the network side device, where the third information includes fifth information, where the fifth information is used to indicate the first information recommended by the terminal, where the first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0233] Optionally, the uplink and downlink time configuration parameters include at least one of a downlink transmission time length, an uplink transmission time length, and a flexible transmission time length in each uplink and downlink time configuration period.

[0234] Optionally, the associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in the transmission, the start time of the target network side device participating in the transmission (for example, the offset relative to the start boundary of the cycle within an uplink and downlink time configuration cycle), and the reference signal corresponding to the target network side device.

[0235] Configuration example:

[0236] Example 1: The terminal recommends configuring the uplink and downlink time configuration period, uplink and downlink time configuration parameters (e.g., downlink transmission time length, uplink transmission time length), and association information of the target network side device, such as TRP_i association start time and time length, and TRP_j association start time and time length. It can be understood that TRP_i and TRP_j reuse the period parameters of the uplink and downlink time slot configuration parameters.

[0237] Example 2: The terminal jointly recommends the uplink and downlink time configuration and the associated information of the target network side device. For example, the terminal recommends configuring the uplink and downlink time configuration period and several parameter combinations (including transmission direction, starting time point, time length, target network side device or reference signal). If the starting time point is not defined, the end time point corresponding to the previous parameter combination is used as the starting time point corresponding to the next parameter combination (that is, the start time of the previous parameter combination plus the time length is obtained to obtain the starting time point corresponding to the next parameter combination). The first parameter combination starts from the starting boundary of the uplink and downlink time configuration period.

[0238] Example 3: The terminal recommends only the association information of the target network device. The terminal obtains the uplink and downlink timing configuration period and the uplink and downlink timing configuration information of each target network device through high-layer information. The terminal only needs to recommend the association information of the target network device (for example, the association start time and duration of TRP_i, and the association start time and duration of TRP_j). At any time, the terminal's transmission direction is determined by the transmission direction of the target network device or the default rule.

[0239] Example 4: The terminal recommends the association information of the target network side device according to the granularity of the uplink and downlink time configuration period. For example, odd-numbered periods are associated with TRP_i, and even-numbered periods are associated with TRP_j.

[0240] Step 4: The network-side device configures the uplink and downlink time configuration period, uplink and downlink time configuration parameters, and associated information of the target network-side device for the UE.

[0241] The uplink and downlink time configuration parameters include at least one of a downlink transmission time length, an uplink transmission time length, and a flexible transmission time length in each uplink and downlink time configuration period.

[0242] The associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in the transmission, the start time of the target network side device participating in the transmission (for example, the offset relative to the start boundary of the cycle within an uplink and downlink time configuration cycle), and the reference signal corresponding to the target network side device.

[0243] Step 5: The terminal determines the target transmission direction and the target network side device according to at least one of the uplink and downlink time configuration period of the UE, the uplink and downlink time configuration parameters of the terminal, and the association information of the target network side device.

[0244] The descriptions of scenario 1 "the network side device configures the association information of the target network side device" and scenario 2 "the network side device does not configure the association information of the target network side device" in this embodiment can refer to the description in embodiment 1.

[0245] Optionally, the method may further include:

[0246] The terminal receives the eighth information, and the eighth information is used to indicate the downlink transmission at different times within the uplink and downlink time configuration period or the correspondence between the uplink transmission and the reference signal (the downlink transmission and the downlink reference signal satisfy a quasi-co-location relationship, and the uplink transmission and the downlink reference signal satisfy the same spatial domain beam characteristics). It can be understood that the reference signal is the reference signal measured in step 1, and different reference signals correspond to communication between the UE and the corresponding network side device.

[0247] It is understandable that if the network side device fully accepts the recommendation of the UE, it can directly feed back to the UE the first information configuration recommended by the UE.

[0248] Embodiment 3: UE temporary demand reporting triggers dynamic configuration of TDD parameters on the network side.

[0249] Step 1: The UE sends the sixth information to the network side device, including: the seventh information and the seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the UE, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0250] Optionally, the uplink transmission or downlink transmission requirement of the UE includes at least one of the following: uplink and downlink time configuration requirement of the UE, a ratio of uplink and downlink transmission time, and QoS requirement.

[0251] For example, the uplink and downlink time configuration requirement refers to the uplink or downlink transmission requirement of the UE at different times. For example, the uplink and downlink time configuration requirement includes at least one of the uplink and downlink time configuration period, the uplink time length, the downlink time length, the order in which the uplink and downlink occur, etc. It will be understood that the time length can be expressed in units of length such as radio frames, subframes, time slots, or OFDM symbols.

[0252] For example, the ratio of uplink to downlink transmission time can be expressed by uplink or downlink and a numerical value. For example, DL 0.4 means that the downlink transmission time accounts for 40% of the uplink and downlink time slot cycle, and correspondingly, the uplink transmission time accounts for 60% of the cycle;

[0253] For example, QoS requirements include but are not limited to uplink and downlink data rate requirements;

[0254] Step 2: The network-side device configures first information and the sixth time for the UE, where the sixth time is used to indicate the effective time of the first information, and the first information includes at least one of the following: the uplink and downlink time configuration period of the terminal, the uplink and downlink time configuration parameters of the terminal, and the association information of the target network-side device;

[0255] Step 3: The terminal determines the target transmission direction and the target network side device according to the sixth time, the uplink and downlink time configuration period of the UE, the uplink and downlink time configuration parameters of the terminal, and at least one of the association information of the target network side device.

[0256] The descriptions of scenario 1 "the network side device configures the association information of the target network side device" and scenario 2 "the network side device does not configure the association information of the target network side device" in this embodiment can refer to the description in embodiment 1.

[0257] Optionally, the method may further include:

[0258] The terminal receives the eighth information, and the eighth information is used to indicate the downlink transmission at different times within the uplink and downlink time configuration period or the correspondence between the uplink transmission and the reference signal (the downlink transmission and the downlink reference signal satisfy a quasi-co-location relationship, and the uplink transmission and the downlink reference signal satisfy the same spatial domain beam characteristics). It can be understood that the reference signal is the reference signal measured in step 1, and different reference signals correspond to communication between the UE and the corresponding network side device.

[0259] Optionally, after the effective time of the first information configured in step 2, the terminal can use the first information previously received to determine the target transmission direction and the target network side device, or the network side device instructs the UE to re-report the uplink transmission or downlink transmission requirements and reconfigure the first information.

[0260] Embodiment 4: In the initial access phase, the UE selects synchronization signal access based on uplink or downlink transmission requirements and the uplink and downlink time slot formats corresponding to the network-side device.

[0261] Step 1: The UE detects the downlink synchronization signal sent by the network-side device and determines the channel quality of the network-side device corresponding to each downlink synchronization signal;

[0262] Step 2: The UE receives the system message and determines the uplink and downlink time slot formats corresponding to each synchronization signal (corresponding to the network-side device);

[0263] Step 3: The UE selects a synchronization signal to initiate a random access procedure based on the UE's uplink or downlink transmission requirements. The UE may randomly select one or more synchronization signals from the synchronization signals whose uplink or downlink time slot formats are closest to the UE's uplink or downlink transmission requirements, or select the best one or more synchronization signals to initiate a PRACH.

[0264] For example, if the UE or the network-side device corresponding to the synchronization signal is flexibly transmitting within a certain period of time, it can be regarded that the uplink or downlink transmission requirement of the UE is consistent with the transmission direction of the network-side device corresponding to the synchronization signal;

[0265] Step 4: In Message 3 (MSG 3) or Message A (MSG A), carry the uplink transmission or downlink transmission requirement;

[0266] Optionally, the uplink transmission or downlink transmission requirement of the UE includes at least one of the following: uplink and downlink time configuration requirement of the UE, a ratio of uplink and downlink transmission time, and QoS requirement.

[0267] For example, the uplink and downlink time configuration requirement refers to the uplink or downlink transmission requirement of the UE at different times. For example, the uplink and downlink time configuration requirement includes at least one of the uplink and downlink time configuration period, the uplink time length, the downlink time length, the order in which the uplink and downlink occur, etc. It is understood that the time length can be expressed in units of length such as radio frames, subframes, time slots, and OFDM symbols.

[0268] For example, the ratio of uplink to downlink transmission time can be expressed by uplink or downlink and a numerical value. For example, DL 0.4 means that the downlink transmission time accounts for 40% of the uplink and downlink time slot cycle, and correspondingly, the uplink transmission time accounts for 60% of the cycle;

[0269] For example, QoS requirements include but are not limited to uplink and downlink data rate requirements.

[0270] Step 5: The network side device configures at least one of the UE's uplink and downlink time configuration period, the terminal's uplink and downlink time configuration parameters, and the associated information of the target network side device for the UE.

[0271] The uplink and downlink time configuration parameters include at least one of a downlink transmission time length, an uplink transmission time length, and a flexible transmission time length in each uplink and downlink time configuration period.

[0272] The associated information of the target network side device includes at least one of the following: the length of time the target network side device participates in the transmission, the start time of the target network side device participating in the transmission (for example, the offset relative to the start boundary of the cycle within an uplink and downlink time configuration cycle), and the reference signal corresponding to the target network side device.

[0273] Step 5: The terminal determines the target transmission direction and the target network side device according to at least one of the uplink and downlink time configuration period of the UE, the uplink and downlink time configuration parameters of the terminal, and the association information of the target network side device.

[0274] Embodiment 5: The UE determines the time slot format of each network-side device according to the semi-static signaling, and independently determines the process of the network-side device associated with the uplink or downlink transmission.

[0275] Step 1: The network-side device sends a downlink reference signal (RS), and the UE receives and measures the downlink reference signal to determine the channel quality between the terminal and different network-side devices. The downlink reference signal includes but is not limited to at least one of SSB, CSI-RS, TRS, DMRS, etc.

[0276] Alternatively, the network side device configures the terminal to send an uplink reference signal, and the network side device measures the uplink reference signal to determine the signal quality between the terminal and different network side devices. The uplink reference signal includes but is not limited to at least one of SRS, PRACH, etc.

[0277] It can be understood that the downlink reference signals are downlink reference signals respectively sent by multiple network-side devices, and the terminal's measurement results of the multiple downlink reference signals respectively represent the signal quality between the multiple network-side devices and the UE.

[0278] In a cell-free network, network-side devices may consist of multiple TRPs or AP clusters. Based on the approximate location of the terminal, the network can select several TRPs or AP clusters from the cell-free network's TRP or AP cluster set as candidate TRPs or AP clusters to serve the terminal. Therefore, the channel quality between the terminal and the candidate TRPs or AP clusters is determined through downlink or uplink reference signal measurements.

[0279] Step 2: The UE feeds back the downlink reference signal measurement result to the network side device;

[0280] It can be understood that the above measurement results may be measurement results of layer 1 or layer 3.

[0281] Step 3: The network side device configures ninth information for the UE, where the ninth information includes: uplink and downlink configuration information of one or more network side devices, where the uplink and downlink configuration information includes at least one of the following: an uplink and downlink time configuration period, a downlink transmission time length within each of the uplink and downlink time configuration periods, an uplink transmission time length within each of the uplink and downlink time configuration periods, and a flexible transmission time length within each of the uplink and downlink time configuration periods; for example, a Semi-static TDD configuration parameter in NR;

[0282] It can be understood that the unit of time length can be expressed in terms of length units such as radio frames, subframes, time slots or OFDM symbols.

[0283] Step 4: Determine the target transmission direction and target network-side device according to the ninth information;

[0284] (1) If the transmission directions of multiple target network-side devices are clear and the same within the first time, the transmission direction of the terminal is consistent with that of the multiple target network-side devices; for example, if the two target network-side devices associated with the UE are both downlink transmission within the first time, then the UE is downlink transmission within the first time;

[0285] (2) If the transmission directions of multiple target network devices are inconsistent within the first time, or if there is a flexible transmission time period:

[0286] 1) The terminal can determine its own uplink or downlink transmission direction and associated one or more target network-side devices in the first time according to the uplink or downlink transmission requirements, and report it to the network;

[0287] For example, TRP1 and TRP2 are downlink transmission and uplink transmission respectively within a first time period. The UE may decide to perform downlink transmission with TRP1 or uplink transmission with TRP2 according to the uplink or downlink transmission requirements within the first time period, and report this to the network.

[0288] For another example, TRP1 and TRP2 are downlink transmission and uplink transmission respectively in the first time. The UE has the same priority for uplink transmission and downlink reception in the first time. The UE can randomly choose to perform downlink transmission with TRP1 or uplink transmission with TRP2 and report it to the network.

[0289] For another example, some TRPs are flexible transmissions in the first time, and the rest of the TRPs are downlink transmissions or uplink transmissions. Then, the UE selects a TRP associated with good channel quality (for example, higher RSRP or RSRQ or SINR or SNR or SIR) from the TRP whose transmission direction is consistent with the uplink or downlink transmission requirements of the UE and the TRP of flexible transmission, or the TRP of the most recent initial access, or the TRP associated at the previous time, or the TRP with a clear transmission direction (that is, not flexible transmission), and determines the transmission direction according to the transmission requirements of the UE. The UE feeds back the transmission direction and the associated TRP to the network.

[0290] For example, if all TRPs are flexible transmissions within the target time period, the UE is associated with the TRP with better channel quality (e.g., higher RSRP, RSRQ, SINR, SNR, or SIR), the TRP of the most recent initial access, or the TRP associated in the previous time period. The UE determines the transmission direction based on its own transmission requirements or randomly, and feeds back the transmission direction and associated TRP to the network.

[0291] 2) The downlink network side device within the first time may indicate the target transmission direction and target network side device of the UE within the first time; wherein, the downlink network side device may be any downlink network side device associated with the UE within the first time, or a downlink network side device with the best channel quality (for example, RSRP, RSRQ, SINR, SNR or SIR); correspondingly, the UE needs to receive an indication from the downlink network side device at the beginning of the time period, and then perform uplink or downlink transmission according to the indication.

[0292] 7 , an embodiment of the present application provides a transmission device, which is applied to a terminal. The device 700 includes:

[0293] A determination module 701 is configured to determine a target transmission direction and a target network-side device, wherein the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0294] The transmission module 702 is configured to perform uplink transmission or downlink transmission according to the target transmission direction and the target network-side device.

[0295] In one embodiment of the present application, the target network side device includes at least one of the following: a first network side device, a second network side device, and the transmission module 702 is further configured to:

[0296] receiving a downlink signal sent by a first network-side device within the first time, where the downlink signal is quasi-co-located with a reference signal of the first network-side device;

[0297] Or, an uplink signal is sent to the second network side device within the first time, and the transmitting beam of the uplink signal (e.g., a spatial domain filter) corresponds to the receiving beam of the reference signal of the second network side device (e.g., a spatial domain filter).

[0298] In one embodiment of the present application, the determining module 701 includes:

[0299] A first receiving unit is configured to receive first information, where the first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0300] The first determining unit is configured to determine the target transmission direction and the target network-side device according to the first information.

[0301] In one embodiment of the present application, when the first information includes at least the associated information of the target network-side device, the determining module 701 is further configured to:

[0302] Determine the target network side device according to the associated information of the target network side device;

[0303] During the first time, if the terminal is configured for flexible transmission and the target network side device is for downlink transmission or uplink transmission, it is determined that the target transmission direction is consistent with the transmission direction of the target network side device.

[0304] In one embodiment of the present application, when the first information includes at least the associated information of the target network-side device, the determining module 701 is further configured to:

[0305] Determine the target network side device according to the associated information of the target network side device;

[0306] During the first time, if the terminal is configured for flexible transmission and the target network side device is flexible transmission, the target transmission direction is determined autonomously, or the target transmission direction is consistent with the transmission direction of the terminal during the second time, and the second time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, optionally, the default direction is downlink transmission.

[0307] In one embodiment of the present application, when the first information does not include the associated information of the target network-side device, the determining module 701 is further configured to:

[0308] According to the first predefined rule, a target transmission direction and a target network-side device are determined.

[0309] In one embodiment of the present application, the target transmission direction and the target network-side device determined by the first predefined rule are not used for data transmission.

[0310] In one embodiment of the present application, the first predefined rule includes:

[0311] The target network-side device includes the network-side device to which the terminal initially accessed most recently, and the target transmission direction is determined according to uplink and downlink time configuration parameters of the terminal.

[0312] In one embodiment of the present application, the first predefined rule includes:

[0313] If the terminal is in flexible transmission within the first time, the target network side device includes at least one of the following:

[0314] (1) The network-side device with the highest channel quality or higher than a first preset value;

[0315] Optionally, the channel quality includes at least one of RSRP, RSRQ, SNR, SINR, and SIR of a downlink reference signal.

[0316] (2) a network-side device associated with the uplink or downlink transmission of the terminal within a third time, wherein the third time is a time before the first time within the uplink and downlink time configuration period, i.e., the target network-side device is a network-side device that participated in the terminal transmission within a time before the first time;

[0317] (3) Network-side equipment for downlink or uplink transmission;

[0318] If the target network side device is performing uplink transmission or downlink transmission within the first time, the target transmission direction of the terminal is consistent with the transmission direction of the target network side device.

[0319] In one embodiment of the present application, the first predefined rule includes:

[0320] If the target network side device includes a flexible transmission time within the first time, the target transmission direction is determined autonomously by the terminal within the flexible transmission time, or the target transmission direction is consistent with the transmission direction of the terminal within a fourth time, and the fourth time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction, for example, the default direction is downlink transmission.

[0321] In one embodiment of the present application, the first predefined rule includes:

[0322] If the target transmission direction is uplink transmission or downlink transmission, the target network side device is determined from a third network side device, wherein the transmission direction of the third network side device is consistent with the target transmission direction within the first time, or the third network side device is flexible transmission, and the target network side device includes at least one of the following:

[0323] (1) The network-side device with the highest channel quality or higher than a second preset value;

[0324] (2) the network-side device to which the terminal last initially accessed;

[0325] (3) a network-side device associated with the uplink transmission or downlink transmission of the terminal within a fifth time period, the fifth time period being a time period before the first time period within the uplink and downlink time configuration period;

[0326] (4) Network-side equipment for downlink or uplink transmission.

[0327] In one embodiment of the present application, the device further comprises:

[0328] The first sending module is configured to send second information to the target network-side device, where the second information includes: a target transmission direction of the terminal within the first time.

[0329] In one embodiment of the present application, the device further comprises:

[0330] A second sending module is used to send third information, where the third information is used by the network side to determine the first information;

[0331] The third information includes at least one of the following:

[0332] Fourth information, where the fourth information is used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0333] Fifth information, the fifth information is used to indicate the first information recommended by the terminal.

[0334] In one embodiment of the present application, the device further comprises:

[0335] a third sending module, configured to send sixth information, where the sixth information is used by the network side to determine the first information and a sixth time, where the sixth time is used to indicate a valid time of the first information;

[0336] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0337] In one embodiment of the present application, the device further comprises:

[0338] The selection module is configured to select one or more synchronization signals to initiate random access according to the fourth information.

[0339] In one embodiment of the present application, the uplink transmission or downlink transmission requirement of the terminal includes at least one of the following:

[0340] (1) Uplink and downlink time configuration requirements;

[0341] For example, the uplink and downlink time configuration requirement refers to the uplink or downlink transmission requirement of the UE at different times. For example, the uplink and downlink time configuration requirement includes at least one of the uplink and downlink time configuration period, the uplink time length, the downlink time length, the order in which the uplink and downlink occur, etc. It is understood that the time length can be expressed in units of length such as radio frames, subframes, time slots, and OFDM symbols.

[0342] (2) The ratio of uplink to downlink transmission time;

[0343] For example, the ratio of uplink to downlink transmission time can be expressed by uplink or downlink and a numerical value. For example, DL 0.4 means that the downlink transmission time accounts for 40% of the uplink and downlink time slot cycle, and correspondingly, the uplink transmission time accounts for 60% of the cycle;

[0344] (3)Service quality requirements.

[0345] For example, the quality of service requirements include but are not limited to uplink and downlink data rate requirements.

[0346] In one embodiment of the present application, the uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length;

[0347] In one embodiment of the present application, the association information of the target network side device includes at least one of the following: the length of time the target network side device participates in transmission, the start time of the target network side device participating in transmission, and the reference signal corresponding to the target network side device.

[0348] In one embodiment of the present application, the device further comprises:

[0349] The first receiving module is used to receive eighth information, where the eighth information is used to indicate the correspondence between downlink transmission or uplink transmission and a reference signal at different times within an uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

[0350] In one embodiment of the present application, the determination module includes:

[0351] A second receiving unit is configured to receive ninth information, where the ninth information includes: uplink and downlink configuration information of one or more network-side devices, where the uplink and downlink configuration information includes at least one of the following: an uplink and downlink time configuration period, a downlink transmission time length within each of the uplink and downlink time configuration periods, an uplink transmission time length within each of the uplink and downlink time configuration periods, and a flexible transmission time length within each of the uplink and downlink time configuration periods;

[0352] The second determining unit is used to determine the target transmission direction and the target network side device according to the ninth information.

[0353] In one embodiment of the present application, the ninth information includes: the uplink and downlink configuration information of the first network side device, the uplink and downlink configuration information of the second network side device, and the uplink and downlink configuration information of the first network side device is different from the uplink and downlink configuration information of the second network side device within the first time.

[0354] In one embodiment of the present application, the second determining unit is further configured to:

[0355] If it is determined according to the ninth information that the transmission modes of the plurality of network-side devices associated with the terminal during the first time are different, or the first time includes a period of flexible transmission, determining the target transmission direction and the target network-side device according to the tenth information, the transmission mode including at least one of uplink transmission, downlink transmission, and duplex transmission;

[0356] The tenth information includes the uplink transmission or downlink transmission requirement of the terminal.

[0357] In one embodiment of the present application, the second determining unit is further configured to:

[0358] If it is determined according to the ninth information that the transmission modes of the multiple network-side devices associated with the terminal within the first time are different, or the first time includes a time for flexible transmission, receiving the eleventh information sent by the fifth network-side device;

[0359] Determining the target transmission direction and the target network-side device according to the eleventh information;

[0360] The eleventh information is used to indicate the target transmission direction and the target network-side device, and the fifth network-side device is a downlink network-side device.

[0361] In one embodiment of the present application, the device further comprises:

[0362] The fourth sending module is used to send twelfth information, where the twelfth information includes: at least one of the target transmission direction and the information of the target network-side device.

[0363] In one embodiment of the present application, the units of the time length of the first time, the time length of the second time, the time length of the third time, the time length of the fourth time, the time length of the fifth time, the time length of the sixth time, the time length of the seventh time, the downlink transmission time length, the uplink transmission time length or the flexible transmission time length are frames, subframes, time slots, orthogonal frequency division multiplexing OFDM symbols.

[0364] The device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0365] 8 , an embodiment of the present application provides a transmission device, which is applied to a fourth network-side device. The device 800 includes:

[0366] A fifth sending module 801 is configured to send first information or ninth information, where the first information or ninth information is used to determine a target transmission direction and a target network-side device; the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0367] The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0368] The ninth information includes: uplink and downlink configuration information of one or more network side devices, and the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

[0369] In one embodiment of the present application, the target network side device includes at least one of the following: a first network side device, a second network side device, and the first information or the ninth information is used to indicate that a downlink signal sent by the first network side device is received within the first time, and the downlink signal is quasi-co-located with a reference signal of the first network side device; or to indicate that an uplink signal is sent to the second network side device within the first time, and the transmission beam of the uplink signal corresponds to the reception beam of the reference signal of the second network side device.

[0370] In one embodiment of the present application, the uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length.

[0371] In one embodiment of the present application, the association information of the target network side device includes at least one of the following: the length of time the target network side device participates in transmission, the start time of the target network side device participating in transmission, and the reference signal corresponding to the target network side device.

[0372] In one embodiment of the present application, the device further comprises:

[0373] The sixth sending module is used to send the seventh information, where the seventh information is used to indicate the correspondence between downlink transmission or uplink transmission and the reference signal at different times within the uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

[0374] In one embodiment of the present application, the fifth sending module 801 includes:

[0375] a fourth receiving unit, configured to receive third information;

[0376] a first sending unit, configured to determine the first information according to the third information, and send the first information;

[0377] The third information includes at least one of the following:

[0378] (1) fourth information, the fourth information being used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0379] (2) Fifth information, the fifth information is used to indicate the first information recommended by the terminal.

[0380] In one embodiment of the present application, the fifth sending module 801 includes:

[0381] a fifth receiving unit, configured to receive sixth information;

[0382] a second sending unit, configured to determine first information and a sixth time according to the sixth information, and send the first information and the sixth time, where the sixth time is used to indicate an effective time of the first information;

[0383] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0384] In one embodiment of the present application, the device further includes: a second receiving module, configured to receive twelfth information sent by the terminal, wherein the twelfth information includes: the target transmission direction.

[0385] In one embodiment of the present application, the units of the time length of the first time, the time length of the sixth time, the time length of the seventh time, the downlink transmission time length, the uplink transmission time length, or the flexible transmission time length are frames, subframes, time slots, and OFDM symbols.

[0386] The device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0387] FIG9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application. The terminal 900 includes, but is not limited to, at least some of the components including a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0388] Those skilled in the art will appreciate that the terminal 900 may further include a power source (such as a battery) for powering various components. The power source may be logically connected to the processor 910 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG9 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0389] It should be understood that in an embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0390] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 901 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 901 may send uplink data to the network-side device. Typically, the RF unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0391] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 may include a volatile memory or a non-volatile memory, or the memory 909 may include a non-transient memory. Among them, the non-volatile memory or non-transient memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0392] Processor 910 may include one or more processing units. Optionally, processor 910 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 910.

[0393] The processor 910 is configured to determine a target transmission direction and a target network-side device, where the target transmission direction is the transmission direction of the terminal within a first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period.

[0394] The radio frequency unit 901 is configured to perform uplink transmission or downlink transmission according to the target transmission direction and the target network-side device.

[0395] Optionally, the RF unit 901 is further used to receive a downlink signal sent by a first network side device within the first time, and the downlink signal is quasi-co-located with the reference signal of the first network side device; or to send an uplink signal to a second network side device within the first time, and the transmitting beam of the uplink signal corresponds to the receiving beam of the reference signal of the second network side device.

[0396] Optionally, the radio frequency unit 901 is further configured to receive first information, where the first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0397] The processor 910 is further configured to determine the target transmission direction and the target network-side device based on the first information.

[0398] Optionally, the processor 910 is further used to determine the target network side device based on the associated information of the target network side device; within the first time, if the terminal is configured for flexible transmission and the target network side device is downlink transmission or uplink transmission, then the target transmission direction is determined to be consistent with the transmission direction of the target network side device; or, within the first time, if the terminal is configured for flexible transmission and the target network side device is flexible transmission, then the target transmission direction is determined, or the target transmission direction is consistent with the transmission direction of the terminal within the second time, and the second time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction.

[0399] Optionally, the processor 910 is further configured to determine a target transmission direction and a target network-side device according to a first predefined rule.

[0400] Optionally, the radio frequency unit 901 is further configured to send second information to the target network side device when the terminal autonomously determines the target transmission direction, where the second information includes: the target transmission direction of the terminal within the first time.

[0401] Optionally, the radio frequency unit 901 is further configured to send third information, where the third information is used to determine the first information;

[0402] The third information includes at least one of the following:

[0403] Fourth information, where the fourth information is used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0404] Fifth information, the fifth information is used to indicate the first information recommended by the terminal.

[0405] Optionally, the radio frequency unit 901 is further configured to send sixth information, where the sixth information is used to determine the first information and a sixth time, where the sixth time is used to indicate a valid time of the first information;

[0406] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0407] Optionally, the processor 910 is further configured to select one or more synchronization signals to initiate random access according to the fourth information.

[0408] Optionally, the radio frequency unit 901 is also used to receive eighth information, where the eighth information is used to indicate the correspondence between downlink transmission or uplink transmission and a reference signal at different times within the uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

[0409] Optionally, the radio frequency unit 901 is further configured to receive ninth information, where the ninth information includes: uplink and downlink configuration information of one or more network-side devices, where the uplink and downlink configuration information includes at least one of the following: an uplink and downlink time configuration period, a downlink transmission time length within each of the uplink and downlink time configuration periods, an uplink transmission time length within each of the uplink and downlink time configuration periods, and a flexible transmission time length within each of the uplink and downlink time configuration periods;

[0410] The processor 910 is further configured to determine the target transmission direction and the target network-side device according to the ninth information.

[0411] Optionally, the processor 910 is further configured to determine, according to the tenth information, the target transmission direction and the target network-side device, when it is determined according to the ninth information that the transmission modes of the multiple network-side devices associated with the terminal within the first time are different, or when the first time includes a time for flexible transmission, the transmission mode including at least one of uplink transmission, downlink transmission, and duplex transmission;

[0412] The tenth information includes the uplink transmission or downlink transmission requirement of the terminal.

[0413] Optionally, the processor 910 is further configured to, when it is determined according to the ninth information that the transmission modes of the multiple network-side devices associated with the terminal within the first time are different, or when the first time includes a time for flexible transmission, receive eleventh information sent by the fifth network-side device;

[0414] The terminal determines the target transmission direction and the target network-side device according to the eleventh information;

[0415] The eleventh information is used to indicate the target transmission direction and the target network-side device, and the fifth network-side device is a downlink network-side device.

[0416] The terminal provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0417] Please refer to Figure 10, which is a structural diagram of the network side device used in the embodiment of the present application.

[0418] As shown in Figure 10, the network side device 1000 includes: a processor 1001, a transceiver 1002, a memory 1003 and a bus interface, wherein the processor 1001 can be responsible for managing the bus architecture and general processing. The memory 1003 can store data used by the processor 1001 when performing operations.

[0419] In one embodiment of the present application, the network side device 1000 further includes: a program stored in the memory 1003 and executable on the processor 1001 , which implements the steps of the method shown in FIG. 4 above when executed by the processor 1001 .

[0420] In Figure 10 , the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits such as one or more processors represented by processor 1001 and memory represented by memory 1003. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and are not further described herein. The bus interface provides an interface. The transceiver 1002 can be multiple components, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium.

[0421] The transceiver 1002 is configured to send the first information or the ninth information, where the first information or the ninth information is used to determine a target transmission direction and a target network-side device; the target transmission direction is the transmission direction of the terminal within the first time period, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time period;

[0422] The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device;

[0423] The ninth information includes: uplink and downlink configuration information of one or more network side devices, and the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

[0424] Optionally, the transceiver 1002 is also used to send seventh information, wherein the seventh information is used to indicate the correspondence between downlink transmission or uplink transmission and a reference signal at different times within the uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

[0425] Optionally, the transceiver 1002 is further configured to receive third information; determine the first information according to the third information, and send the first information;

[0426] The third information includes at least one of the following:

[0427] Fourth information, where the fourth information is used to indicate an uplink transmission or downlink transmission requirement of the terminal;

[0428] fifth information, where the fifth information is used to indicate the first information recommended by the terminal;

[0429] Optionally, the transceiver 1002 is further configured to receive sixth information; determine the first information and a sixth time according to the sixth information, and send the first information and the sixth time, where the sixth time is used to indicate the effective time of the first information;

[0430] The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

[0431] Optionally, the transceiver 1002 is further configured to receive twelfth information sent by the terminal, where the twelfth information includes at least one of information of the target transmission direction and information of the target network-side device.

[0432] Please refer to Figure 11, which is a structural diagram of a communication device applied in an embodiment of the present application. The communication device can be a terminal or a network-side device.

[0433] As shown in Figure 11, an embodiment of the present application also provides a communication device 1100, including a processor 1101 and a memory 1102, and the memory 1102 stores programs or instructions that can be run on the processor 1101. For example, when the communication device 1100 is a terminal, the program or instruction is executed by the processor 1101 to implement the various steps of the method embodiment of Figure 3 above. When the communication device 1100 is a network side device, the program or instruction is executed by the processor 1101 to implement the various steps of the method embodiment of Figure 4 above and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0434] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the method of Figure 3 or Figure 4 and the various processes of the above-mentioned embodiments are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0435] The processor is the processor in the terminal or network-side device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0436] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes shown in Figure 3 or Figure 4 and the various method embodiments mentioned above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0437] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0438] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes shown in Figure 3 or Figure 4 and the various method embodiments described above, and can achieve the same technical effects. To avoid repetition, they are not described here.

[0439] An embodiment of the present application also provides a communication system, which includes a terminal and a network-side device. The terminal is used to execute the various processes shown in Figure 3 and the above-mentioned method embodiments, and the network-side device is used to execute the various processes shown in Figure 4 and the above-mentioned method embodiments, and can achieve the same technical effects. To avoid repetition, they will not be repeated here.

[0440] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0441] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0442] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A transmission method, comprising: The terminal determines a target transmission direction and a target network side device, wherein the target transmission direction is a transmission direction of the terminal within a first time, and the target network side device includes one or more network side devices associated with the target transmission direction within the first time; The terminal performs uplink transmission or downlink transmission according to the target transmission direction and the target network side device.

2. The method according to claim 1, wherein: The target network side device includes at least one of the following: a first network side device, a second network side device, and the terminal performs uplink transmission or downlink transmission according to the target transmission direction and the target network side device, including at least one of the following: The terminal receives a downlink signal sent by a first network side device within the first time, where the downlink signal is quasi-co-located with a reference signal of the first network side device; The terminal sends an uplink signal to the second network side device within the first time, and the transmission beam of the uplink signal corresponds to the reception beam of the reference signal of the second network side device.

3. The method according to claim 1 or 2, wherein: The terminal determines the target transmission direction and the target network side device, including: The terminal receives first information, where the first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device; The terminal determines the target transmission direction and the target network side device according to the first information.

4. The method according to claim 3, wherein: In a case where the first information includes at least the association information of the target network side device, the terminal determines the target transmission direction and the target network side device according to the first information, including: The terminal determines the target network side device according to the associated information of the target network side device; During the first time, if the terminal is configured for flexible transmission and the target network side device is for downlink transmission or uplink transmission, the terminal determines that the target transmission direction is consistent with the transmission direction of the target network side device; or, Within the first time, if the terminal is configured for flexible transmission and the target network side device is flexible transmission, the terminal autonomously determines the target transmission direction, or the target transmission direction is consistent with the transmission direction of the terminal within the second time, and the second time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is the default direction.

5. The method according to claim 3, wherein: In a case where the first information does not include the associated information of the target network side device, the terminal determines the target transmission direction and the target network side device according to the first information, including: The terminal determines a target transmission direction and a target network-side device according to a first predefined rule.

6. The method according to claim 5, wherein: The target transmission direction and the target network side device determined by the first predefined rule are not used for data transmission.

7. The method according to claim 5, wherein: The first predefined rule includes: The target network side device includes: the network side device to which the terminal initially accessed most recently, and the target transmission direction is determined according to the uplink and downlink time configuration parameters of the terminal.

8. The method according to claim 5, wherein: The first predefined rule includes: If the terminal is in flexible transmission during the first time, the target network side device includes at least one of the following: A network side device having the highest channel quality or higher than a first preset value; The network side device to which the terminal initially accessed most recently; A network-side device associated with uplink transmission or downlink transmission of the terminal within a third time, wherein the third time is a time before the first time within the uplink and downlink time configuration period; Network side equipment for downlink or uplink transmission; If the target network side device is performing uplink transmission or downlink transmission within the first time, the target transmission direction of the terminal is consistent with the transmission direction of the target network side device; or, The first predefined rule includes: If the target network side device includes a flexible transmission time within the first time, the target transmission direction is autonomously determined by the terminal within the flexible transmission time, or the target transmission direction is consistent with the transmission direction of the terminal within a fourth time, and the fourth time is the time before the first time within the uplink and downlink time configuration period, or the target transmission direction is a default direction.

9. The method according to claim 5, wherein: The first predefined rule includes: If the target transmission direction is uplink transmission or downlink transmission, the target network side device is determined from a third network side device, wherein the transmission direction of the third network side device is consistent with the target transmission direction within the first time, or the third network side device is flexible transmission, and the target network side device includes at least one of the following: A network side device having the highest channel quality or higher than a second preset value; The network side device to which the terminal initially accessed most recently; A network-side device associated with uplink transmission or downlink transmission of the terminal within a fifth time, wherein the fifth time is a time before the first time within the uplink and downlink time configuration period; Network-side equipment for downlink or uplink transmission.

10. The method according to claim 4 or 8, wherein: In the case where the terminal autonomously determines the target transmission direction, the method further includes: The terminal sends second information to the target network side device, where the second information includes: a target transmission direction of the terminal within the first time.

11. The method according to claim 3, wherein: Before the terminal receives the first information, the method further includes: The terminal sends third information, where the third information is used to determine the first information; The third information includes at least one of the following: Fourth information, where the fourth information is used to indicate an uplink transmission or downlink transmission requirement of the terminal; fifth information, where the fifth information is used to indicate the first information recommended by the terminal; or, The terminal sends sixth information, where the sixth information is used to determine the first information and a sixth time, where the sixth time is used to indicate a time when the first information takes effect; The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or to indicate the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

12. The method according to claim 11, wherein: The third information includes the fourth information, and before the terminal sends the third information, the method further includes: One or more synchronization signals are selected according to the fourth information to initiate random access.

13. The method according to claim 11, wherein: The uplink transmission or downlink transmission requirement of the terminal includes at least one of the following: Uplink and downlink time configuration requirements; The ratio of uplink to downlink transmission time; Service quality requirements.

14. The method according to claim 3, wherein: The uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length; or, The associated information of the target network side device includes at least one of the following: the time length of the target network side device participating in transmission, the start time of the target network side device participating in transmission, and the reference signal corresponding to the target network side device.

15. The method according to claim 1, further comprising: The terminal receives eighth information, where the eighth information is used to indicate a correspondence between downlink transmission or uplink transmission and a reference signal at different times within an uplink and downlink time configuration period, and the reference signal is used to determine a channel quality between the terminal and different network side devices.

16. The method according to claim 1 or 2, wherein: The terminal determines the target transmission direction and the target network side device, including: The terminal receives ninth information, the ninth information including: uplink and downlink configuration information of one or more network side devices, the uplink and downlink configuration information including at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period; The terminal determines the target transmission direction and the target network side device according to the ninth information.

17. The method according to claim 16, wherein: The ninth information includes: uplink and downlink configuration information of the first network side device, and uplink and downlink configuration information of the second network side device, wherein the uplink and downlink configuration information of the first network side device is different from the uplink and downlink configuration information of the second network side device within the first time.

18. The method according to claim 16, wherein: The terminal determines the target transmission direction and the target network side device according to the ninth information, including: In a case where it is determined according to the ninth information that the transmission modes of the plurality of network-side devices associated with the terminal within the first time are different, or in a case where the first time includes a time of flexible transmission, the terminal determines the target transmission direction and the target network-side device according to the tenth information, and the transmission mode includes at least one of uplink transmission, downlink transmission, and duplex transmission; The tenth information includes the uplink transmission or downlink transmission requirement of the terminal.

19. The method according to claim 16, wherein: The terminal determines the target transmission direction and the target network side device according to the ninth information, including: In a case where it is determined according to the ninth information that the transmission modes of the plurality of network-side devices associated with the terminal within the first time are different, or in a case where the first time includes a time for flexible transmission, the terminal receives the eleventh information sent by the fifth network-side device; The terminal determines the target transmission direction and the target network side device according to the eleventh information; Among them, the eleventh information is used to indicate the target transmission direction and the target network side device, and the fifth network side device is a downlink network side device.

20. The method of claim 16, 18 or 19, wherein: After the terminal determines the target transmission direction and the target network side device according to the ninth information, the tenth information, or the eleventh information, the method further includes: The terminal sends twelfth information, and the twelfth information includes: at least one of the target transmission direction and the information of the target network side device.

21. The method of claim 1, 2, 4, 8, 9, 10, 11, 14, 17, 18 or 19, wherein: The units of the time length of the first time, the time length of the second time, the time length of the third time, the time length of the fourth time, the time length of the fifth time, the time length of the sixth time, the time length of the seventh time, the downlink transmission time length, the uplink transmission time length or the flexible transmission time length are frames, subframes, time slots or orthogonal frequency division multiplexing OFDM symbols.

22. A transmission method, comprising: The fourth network side device sends the first information or the ninth information, where the first information or the ninth information is used to determine the target transmission direction and the target network side device; The target transmission direction is the transmission direction of the terminal within a first time, and the target network side device includes one or more network side devices associated with the target transmission direction within the first time; The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device; The ninth information includes: uplink and downlink configuration information of one or more network side devices, the uplink and downlink configuration information It includes at least one of the following: an uplink and downlink time configuration period, a downlink transmission time length within each of the uplink and downlink time configuration periods, an uplink transmission time length within each of the uplink and downlink time configuration periods, and a flexible transmission time length within each of the uplink and downlink time configuration periods.

23. The method according to claim 22, wherein: The target network side device includes at least one of the following: a first network side device, a second network side device, the first information or the ninth information is used to indicate that a downlink signal sent by the first network side device is received within the first time, and the downlink signal is quasi-co-located with a reference signal of the first network side device; or to indicate that an uplink signal is sent to the second network side device within the first time, and a transmission beam of the uplink signal corresponds to a reception beam of a reference signal of the second network side device.

24. The method according to claim 22, wherein: The uplink and downlink time configuration parameters include at least one of the following: downlink transmission time length, uplink transmission time length, and flexible transmission time length; or, The associated information of the target network side device includes at least one of the following: the time length of the target network side device participating in transmission, the start time of the target network side device participating in transmission, and the reference signal corresponding to the target network side device.

25. The method according to claim 22, further comprising: The fourth network side device sends seventh information, where the seventh information is used to indicate the correspondence between downlink transmission or uplink transmission and a reference signal at different times within an uplink and downlink time configuration period, and the reference signal is used to determine the channel quality between the terminal and different network side devices.

26. The method of claim 22, wherein: The fourth network side device sends the first information, including: The fourth network side device receives third information; The fourth network side device determines the first information according to the third information, and sends the first information; The third information includes at least one of the following: Fourth information, where the fourth information is used to indicate an uplink transmission or downlink transmission requirement of the terminal; fifth information, where the fifth information is used to indicate the first information recommended by the terminal; or, The fourth network side device receives sixth information; The fourth network side device determines the first information and the sixth time according to the sixth information, and sends the first information and the sixth time, where the sixth time is used to indicate the effective time of the first information; The sixth information includes: seventh information and seventh time, the seventh information is used to indicate the uplink transmission or downlink transmission requirement of the terminal, or indicates the first information recommended by the terminal, and the seventh time is used to indicate the duration of the seventh information.

27. The method of claim 22, wherein: After sending the ninth information, the method further includes: The fourth network side device receives twelfth information sent by the terminal, where the twelfth information includes: at least one of the target transmission direction and information of the target network side device.

28. The method of claim 22, 24 or 26, wherein: The units of the time length of the first time, the time length of the sixth time, the time length of the seventh time, the downlink transmission time length, the uplink transmission time length, or the flexible transmission time length are frames, subframes, time slots, or OFDM symbols.

29. A transmission device, comprising: A determination module, configured to determine a target transmission direction and a target network-side device, wherein the target transmission direction is a transmission direction of a terminal within a first time, and the target network-side device includes one or more network-side devices associated with the target transmission direction within the first time; The transmission module is used to perform uplink transmission or downlink transmission according to the target transmission direction and the target network side device.

30. A transmission device, comprising: a fifth sending module, configured to send the first information or the ninth information, wherein the first information or the ninth information is used to determine a target transmission direction and a target network side device; The target transmission direction is the transmission direction of the terminal within a first time, and the target network side device includes one or more network side devices associated with the target transmission direction within the first time; The first information includes at least one of the following: an uplink and downlink time configuration period of the terminal, an uplink and downlink time configuration parameter of the terminal, and association information of the target network side device; The ninth information includes: uplink and downlink configuration information of one or more network side devices, the uplink and downlink configuration information includes at least one of the following: uplink and downlink time configuration period, downlink transmission time length within each uplink and downlink time configuration period, uplink transmission time length within each uplink and downlink time configuration period, and flexible transmission time length within each uplink and downlink time configuration period.

31. A terminal, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method according to any one of claims 1 to 21.

32. A network side device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method as described in any one of claims 22 to 28.

33. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor of a terminal, implements the steps of the method according to any one of claims 1 to 28.

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