A data transmission method and apparatus

Abstract

The application provides a data transmission method and device and communication equipment, and relates to the technical field of wireless communication. The method comprises the following steps: acquiring control signaling sent by a base station; wherein the control signaling carries indication information of a transmission access point (TRP) working mode and / or a beam mapping scheme; the TRP working mode is single-TRP-based transmission or multi-TRP-based transmission; the beam mapping scheme comprises a mapping pattern between multiple uplink cooperative transmission beams corresponding to multi-TRP and a time unit and / or information of the time unit; and data is sent to the base station according to the TRP working mode and / or the beam mapping scheme.

Description

Technical Field

[0001] This invention relates to the field of mobile communications, and in particular to a data transmission method and apparatus. Background Technology

[0002] In high-frequency mobile communication, the obstruction effect caused by obstacles such as people or vehicles becomes more significant as the wavelength decreases. Therefore, as the frequency bands of electromagnetic waves used in mobile communication continue to rise, to ensure network coverage, it is necessary to adjust the original single-transmission-receive-point (TRP) method to a multi-TRP-based transmission method for mobile communication. This method utilizes the cooperation between multiple TRPs to communicate from multiple angle beams corresponding to multiple TRPs, thereby reducing the adverse effects of obstruction. Summary of the Invention

[0003] A first aspect of the present invention provides a data transmission method applied to a user equipment (UE), comprising: acquiring control signaling sent by a base station; wherein the control signaling carries indication information of a Transmission Access Point (TRP) operating mode and / or a beam mapping scheme, the TRP operating mode being either single-TRP-based transmission or multi-TRP-based transmission, and the beam mapping scheme including a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units; and transmitting data to the base station in the TRP operating mode and / or beam mapping scheme.

[0004] Optionally, obtaining the control signaling sent by the base station includes: receiving a first group downlink control information (DCI) sent by the base station on the Physical Downlink Control Channel (PDCCH); wherein the first group DCI carries indication information of the TRP operating mode.

[0005] Optionally, after receiving the first group downlink control information (DCI) sent by the base station on the physical downlink control channel (PDCCH), the method further includes: receiving a first specific DCI corresponding to the UE sent by the base station on the PDCCH; and decoding the first specific DCI according to the decoding strategy corresponding to the TRP working mode in the first group DCI to obtain the indication information of the beam mapping scheme.

[0006] Optionally, before sending data to the base station in the TRP working mode and / or beam mapping scheme, the method further includes: configuring the beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or, predefining the beam mapping scheme corresponding to the indication information for the UE.

[0007] Optionally, obtaining the control signaling sent by the base station includes: receiving a second group DCI sent by the base station on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme; and determining the corresponding TRP working mode according to the indication information of the beam mapping scheme carried by the second group DCI.

[0008] Optionally, obtaining the control signaling sent by the base station includes: receiving a second specific message for the UE sent by the base station on the PDCCH; wherein the second specific message carries indication information of the beam mapping scheme and / or indication information of the TRP working mode.

[0009] Optionally, the second specific DCI carries indication information of the TRP working mode. Before sending data to the base station in the TRP working mode and / or beam mapping scheme, the method further includes: configuring the beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or, predefining the beam mapping scheme corresponding to the indication information for the UE.

[0010] Optionally, the beam mapping scheme indication information carried in the control signaling indicates either the combination of the mapping pattern and time unit selected by the base station, or the fact that the base station has not selected a beam mapping scheme.

[0011] Optionally, the beam mapping scheme indication information carried in the control signaling represents one of the mapping pattern and the time unit; before sending data to the base station in the TRP operating mode and / or beam mapping scheme, the method further includes: configuring the other of the mapping pattern and the time unit according to the higher-layer signaling sent by the base station.

[0012] Optionally, before sending data to the base station in the TRP working mode and / or beam mapping scheme, the method further includes: using a decoding strategy corresponding to the TRP working mode to decode the specific DCI sent by the base station for the UE, so as to obtain the data scheduling information used by the physical uplink shared channel (PUSCH); wherein, the PUSCH is used to send the data to the base station, and the data scheduling information includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

[0013] A second aspect of the present invention provides a data transmission method applied to a base station, comprising: sending control signaling to a user equipment (UE); wherein the control signaling carries indication information of a Transmission Access Point (TRP) operating mode and / or a beam mapping scheme, the TRP operating mode being either single-TRP-based transmission or multi-TRP-based transmission, and the beam mapping scheme including a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units; and receiving data transmitted by the UE in the TRP operating mode and / or beam mapping scheme.

[0014] Optionally, sending control signaling to the user equipment (UE) includes: sending a first group downlink control information (DCI) to the UE on the physical downlink control channel (PDCCH); wherein the first group DCI carries indication information of the TRP operating mode.

[0015] Optionally, after sending control signaling to the user equipment (UE), the method further includes: sending a first specific DCI for the UE; wherein the first specific DCI is used to decode using the decoding strategy corresponding to the TRP working mode in the first group of DCIs, and carries indication information of the beam mapping scheme.

[0016] Optionally, before receiving the data sent by the UE in the TRP working mode and / or beam mapping scheme, the method further includes: sending higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0017] Optionally, sending control signaling to the user equipment (UE) includes: sending a second group DCI to the UE on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP operating mode.

[0018] Optionally, sending control signaling to the user equipment (UE) includes: sending a second specific DCI for the UE on the PDCCH; wherein the second specific DCI carries indication information of the beam mapping scheme and / or indication information of the TRP operating mode.

[0019] Optionally, the second specific DCI carries indication information of the TRP operating mode, and before receiving data sent by the UE in the TRP operating mode and / or beam mapping scheme, the method further includes: sending higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0020] Optionally, the beam mapping scheme indication information carried in the control signaling indicates either the combination of the mapping pattern and time unit selected by the base station, or the fact that the base station has not selected a beam mapping scheme.

[0021] Optionally, the beam mapping scheme indication information carried in the control signaling represents one of the mapping pattern and the time unit; before receiving data sent by the UE in the TRP operating mode and / or beam mapping scheme, the method further includes: sending the higher-layer signaling to the UE to configure the other of the mapping pattern and the time unit.

[0022] Optionally, before sending control signaling to the user equipment (UE), the method further includes: scheduling based on channel state (CSI) measurements to determine at least one of the TRP operating mode and the beam mapping scheme; and / or, beam management to determine at least one of the TRP operating mode and the beam mapping scheme.

[0023] A third aspect of the present invention provides a data transmission apparatus applied to a UE, the apparatus comprising:

[0024] The acquisition module is configured to acquire control signaling sent by the base station; wherein the control signaling carries indication information of the Transmission Access Point (TRP) operating mode and / or beam mapping scheme, the TRP operating mode being either single-TRP-based transmission or multi-TRP-based transmission, and the beam mapping scheme including a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units; the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units.

[0025] The transmission module is configured to send data to the base station in the TRP operating mode and / or beam mapping scheme.

[0026] Optionally, the acquisition module includes: a first receiving unit configured to receive a first group downlink control information (DCI) sent by the base station on the physical downlink control channel (PDCCH); wherein the first group DCI carries indication information of the TRP operating mode.

[0027] Optionally, the acquisition module further includes: a second receiving unit configured to receive a first specific DCI for the UE sent by the base station on the PDCCH; and a decoding unit configured to decode the first specific DCI according to the decoding strategy corresponding to the TRP working mode in the first group of DCIs to obtain the indication information of the beam mapping scheme.

[0028] Optionally, the apparatus further includes a processing module configured to: configure a beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or predefine a beam mapping scheme corresponding to the indication information for the UE.

[0029] Optionally, the acquisition module includes: a third receiving unit configured to receive a second group DCI transmitted by the base station on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme; and a determining unit configured to determine the corresponding TRP operating mode based on the indication information of the beam mapping scheme carried by the second group DCI.

[0030] Optionally, the acquisition module is configured as: a fourth receiving unit, used to receive a second specific DCI for the UE sent by the base station on the PDCCH; wherein the second specific DCI carries indication information of the beam mapping scheme and / or indication information of the TRP working mode.

[0031] Optionally, the second specific DCI carries indication information of the TRP operating mode, and the device further includes a processing module configured to: configure a beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or predefine a beam mapping scheme corresponding to the indication information for the UE.

[0032] Optionally, the beam mapping scheme indication information carried in the control signaling indicates either the combination of the mapping pattern and time unit selected by the base station, or the fact that the base station has not selected a beam mapping scheme.

[0033] Optionally, the beam mapping scheme indication information carried in the control signaling represents one of the mapping pattern and the time unit; the apparatus further includes: a configuration module configured to configure the other of the mapping pattern and the time unit according to the higher-layer signaling sent by the base station.

[0034] Optionally, the device further includes a decoding module configured to: decode the specific DCI sent by the base station for the UE using the decoding strategy corresponding to the TRP working mode, so as to obtain the data scheduling information used by the Physical Uplink Shared Channel (PUSCH); wherein the data scheduling information includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

[0035] A fourth aspect of the present invention provides a data transmission apparatus applied to a base station. The apparatus includes: a transmitting module configured to transmit control signaling to a user equipment (UE); wherein the control signaling carries indication information of a Transmission Access Point (TRP) operating mode and / or a beam mapping scheme, the TRP operating mode being either single-TRP-based transmission or multi-TRP-based transmission, and the beam mapping scheme including a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units; and a receiving module configured to receive data transmitted by the UE in the TRP operating mode and / or beam mapping scheme.

[0036] Optionally, the transmitting module includes: a first transmitting unit configured to transmit a first group downlink control information (DCI) to the UE on the physical downlink control channel (PDCCH); wherein the first group DCI carries indication information of the TRP operating mode.

[0037] Optionally, the transmitting module further includes: a second transmitting unit configured to transmit a first specific DCI for the UE to the UE; wherein the first specific DCI is used to decode using the decoding strategy corresponding to the TRP working mode in the first group of DCIs, and carries indication information of the beam mapping scheme.

[0038] Optionally, the apparatus further includes: a first configuration module configured to send higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0039] Optionally, the transmitting module includes: a third transmitting unit configured to transmit a second group DCI to the UE on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP operating mode.

[0040] Optionally, the transmitting module includes: a fourth transmitting unit configured to transmit a second specific DCI for the UE to the UE on the PDCCH; wherein the second specific DCI carries indication information of the beam mapping scheme and / or indication information of the TRP operating mode.

[0041] Optionally, the second specific DCI carries indication information of the TRP operating mode, and the device further includes: a first configuration module configured to send higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0042] Optionally, the beam mapping scheme indication information carried in the control signaling indicates either the combination of the mapping pattern and time unit selected by the base station, or the fact that the base station has not selected a beam mapping scheme.

[0043] Optionally, the beam mapping scheme indication information carried in the control signaling represents one of the mapping pattern and the time unit; the apparatus further includes: a second configuration module configured to send the higher-layer signaling to the UE to configure the other of the mapping pattern and the time unit.

[0044] Optionally, the apparatus further includes a scheduling module configured to: perform scheduling based on channel state CSI measurements to determine at least one of the TRP operating mode and the beam mapping scheme; and / or, beam management to determine at least one of the TRP operating mode and the beam mapping scheme.

[0045] A fifth aspect of the present invention provides a communication device including a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor executes the computer program to implement the data transmission method as proposed in the first aspect.

[0046] A sixth aspect of the present invention provides a communication device including a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor executes the computer program to implement the data transmission method as proposed in the second aspect.

[0047] A seventh aspect of the present invention provides a processor-readable storage medium storing a computer program for causing the processor to execute the data transmission method proposed in the first aspect embodiment, or the data transmission method proposed in the second aspect embodiment.

[0048] This invention provides a data transmission method and apparatus. After a base station sends control signaling to a UE, the control signaling carries indication information of the TRP working mode and / or beam mapping scheme. Under the scheduling of the base station, the UE transmits data on the uplink channel using the corresponding TRP working mode and / or beam mapping scheme. Correspondingly, the base station receives the data transmitted by the UE using the TRP working mode and / or beam mapping scheme. This method can be applied to channels such as PUSCH and PUCCH, enabling single-TRP transmission or multi-TRP-based transmission switching on these channels, or beam mapping scheme scheduling, thus improving data transmission quality.

[0049] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0050] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings.

[0051] in:

[0052] Figure 1 A flowchart illustrating a data transmission method provided in an embodiment of the present invention;

[0053] Figure 2 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0054] Figure 3 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0055] Figure 4 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0056] Figure 5 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0057] Figure 6 A flowchart of a data transmission method provided in an embodiment of the present invention;

[0058] Figure 7 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0059] Figure 8 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0060] Figure 9 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0061] Figure 10 A flowchart illustrating another data transmission method provided in an embodiment of the present invention;

[0062] Figure 11 This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0063] Figure 12 This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0064] Figure 13 This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0065] Figure 14This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0066] Figure 15 This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0067] Figure 16 This is a schematic diagram of the structure of a data transmission device proposed in this invention;

[0068] Figure 17 This is a schematic diagram of another data transmission device proposed in this invention;

[0069] Figure 18 This is a schematic diagram of another data transmission device proposed in this invention;

[0070] Figure 19 This is a schematic diagram of another data transmission device proposed in this invention;

[0071] Figure 20 This is a schematic diagram of another data transmission device proposed in this invention;

[0072] Figure 21 This is a schematic diagram of another data transmission device proposed in this invention;

[0073] Figure 22 This is a schematic diagram of another data transmission device proposed in this invention;

[0074] Figure 23 This is a schematic diagram of the structure of a communication device proposed in this invention. Detailed Implementation

[0075] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0076] In related technologies, in terms of multi-TRP-based transmission or inter-panel cooperation, it has only been applied to the physical downlink shared channel (PDSCH), which limits its application scope.

[0077] To address this issue, embodiments of the present invention provide a data transmission method and apparatus.

[0078] Figure 1This is a flowchart illustrating a data transmission method provided in an embodiment of the present invention. Executed by the UE, it flexibly enables data transmission from the terminal to the base station based on multiple TRPs or a single TRP on the uplink channel, under the base station's scheduling of the TRP operating mode and / or beam mapping scheme. The uplink channel typically includes the uplink control channel (PDCCH) and / or the uplink shared channel (PUSCH). The uplink channel typically includes the uplink shared channel (PUSCH). Figure 1 As shown, the data transmission method includes the following steps:

[0079] Step 101: Obtain the control signaling sent by the base station.

[0080] In some embodiments of this disclosure, the control signaling may be downlink control information (DCI) transmitted on the PDCCH or other signaling, or it may be control signaling transmitted on the PDSCH. In this embodiment, the specific form of the control signaling is not limited.

[0081] The control signaling carries indication information of the Transmission Access Point (TRP) operating mode and / or beam mapping scheme. The TRP operating mode is based on single TRP transmission or multi-TRP transmission. The beam mapping scheme includes a mapping pattern between multiple cooperative uplink beams and time units corresponding to multiple TRPs and / or information about the time units.

[0082] After receiving the control signaling, the UE determines whether the transmission is based on a single TRP or multiple TRPs, as specified by the base station scheduling, based on the indication information carried in the control signaling. If the base station scheduling specifies multiple TRPs as the TRP operating mode, a specific beam mapping scheme can be specified, including a mapping pattern between multiple uplink beams and time units corresponding to multiple TRPs, and at least one of the time units. This allows the UE to flexibly switch between data transmission based on multiple TRPs and single TRPs under the base station scheduling.

[0083] Optionally, the mapping pattern between beams and time units for multi-TRP transmission can be one of the following, but is not limited to the following possibilities:

[0084] 1) Periodic mapping: The beams corresponding to the two TCIs (transmission configuration indications) (represented by the beam direction TCI state, labeled as TCI 1 and TCI 2) are sequentially and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are cyclically mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0085] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0086] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0087] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0088] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0089] 1) Nominal repetition;

[0090] 2) Actual repetition;

[0091] 3) Slot-level mapping.

[0092] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0093] Step 102: Send data to the base station using the TRP operating mode and / or beam mapping scheme.

[0094] Optionally, the UE transmits uplink data to the base station on the PUSCH using the TRP operating mode and / or beam mapping scheme. In embodiments of this disclosure, the uplink transmission can be signaling, data, or a mixed signaling / data transmission.

[0095] Optionally, the UE transmits uplink data to the base station on the PUCCH using the TRP operating mode and / or beam mapping scheme. In embodiments of this disclosure, the uplink transmission can be signaling, data, or a hybrid signaling & data transmission.

[0096] The UE transmits uplink data to the base station using the TRP operating mode and / or beam mapping scheme specified by the base station. Since there is a certain correlation between the UE's retransmission mechanism, the TRP operating mode, and the beam mapping scheme, the base station's scheduling of the TRP operating mode and / or beam mapping scheme optimizes resource allocation, thereby improving the communication quality of the uplink channel.

[0097] In this embodiment, after the base station sends control signaling to the UE, since the control signaling carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send uplink transmission on the uplink channel. Correspondingly, the base station receives the uplink transmission sent by the UE in the TRP working mode and / or beam mapping scheme, which can be applied to channels such as PUSCH and PUCCH, realizing the switching of single TRP transmission or multi-TRP based transmission on these channels, or the scheduling of beam mapping schemes, thereby improving the transmission quality.

[0098] This embodiment provides another data transmission method. Figure 2 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by the UE. In this method, the base station only needs to schedule the UE's TRP operating mode and notify the UE that the TRP operating mode specified by the base station is either single-TRP transmission or multi-TRP-based transmission.

[0099] like Figure 2 As shown, the method may include the following steps:

[0100] Step 201: Receive the first group message sent by the base station.

[0101] The first group of messages carries information indicating the TRP operating mode. The TRP operating mode is either based on a single TRP transmission or based on multiple TRP transmissions.

[0102] In some embodiments of this disclosure, the message may be downlink control information (DCI) or other signaling transmitted on the PDCCH, or it may be signaling transmitted on the PDSCH. The specific form of the message is not limited in this embodiment. That is, in some embodiments of this disclosure, the first group message may, for example, be a first group DCI.

[0103] The first group message is a group message carrying indication information of the TRP operating mode, generated by the base station after determining a suitable TRP operating mode for the UE from single-TRP-based transmission and multi-TRP-based transmission modes based on parameters. In some embodiments, the parameters can be any one or more of the following: beam management, CSI measurements obtained by performing channel quality measurements on uplink / downlink channel states, and scheduling the TRP operating mode.

[0104] The first group is a message sent by the base station to a group of UEs, including UEs executing this embodiment. The UE, based on configuration information, communication protocols, condition parameters, or pre-stored parameters received from the base station, determines the information bit position corresponding to itself in the first group message and the RNTI used for descrambling. In some embodiments, the first group message is a bitmap with a first number of bits, each bit corresponding to one or more UEs to indicate the RNTI used for descrambling for that one or more UEs. In some embodiments, the UE can determine the bit corresponding to itself based on configuration information sent by a higher-layer base station. In other embodiments, the UE can determine the bit corresponding to itself based on a corresponding communication protocol. In still other embodiments, the UE can determine the bit corresponding to itself based on condition parameters; where the condition parameters can be any of the following: channel conditions, load conditions, etc. In yet another embodiment, the UE can determine the bit corresponding to itself based on pre-stored parameters; where the pre-stored parameters can be any of the following: UE class, UE ID, etc.

[0105] After receiving the first group message, the UE descrambles the RNTI it has learned and reads the corresponding information bit position to obtain the TRP working mode corresponding to the UE.

[0106] Step 202: Send uplink transmission in the uplink channel using the TRP operating mode.

[0107] Optionally, the UE transmits uplink data to the base station on the PUSCH in the TRP operating mode. In this embodiment of the disclosure, the uplink transmission can be signaling, data, or a mixed signaling / data transmission.

[0108] Optionally, the UE transmits uplink data to the base station on the PUCCH in the TRP operating mode. In this embodiment of the disclosure, the uplink transmission can be signaling, data, or a mixed signaling and data transmission.

[0109] Optionally, after the UE obtains the TRP operating mode carried in the first group message, it uses the decoding strategy corresponding to that TRP operating mode to decode the specific message sent by the base station to the UE, thereby determining the data scheduling information configured by the base station for the UE, such as data transmission information based on codebook transmission or data transmission information based on non-codebook transmission. Based on the data transmission information based on codebook transmission or data transmission information based on non-codebook transmission, the UE uses the single-TRP-based or multi-TRP-based transmission operating mode specified by the base station to transmit data on the uplink channel (e.g., PUSCH or PDSCH).

[0110] In some embodiments of this disclosure, the specific message may be a specific DCI.

[0111] When the TRP working mode is based on multi-TRP transmission, the UE can execute the beam mapping scheme because the UE has been pre-configured by the base station or the UE has predefined the beam mapping scheme.

[0112] For example, the base station can configure the beam mapping scheme for the UE based on signaling sent to the UE, such as RRC signaling. Thus, when the TRP operating mode is multi-TRP based transmission, the UE transmits data on the uplink channel (e.g., PUSCH or PDSCH) in multi-TRP based transmission mode according to the configured beam mapping scheme. Another example is that the base station can determine the beam mapping scheme corresponding to the UE based on the communication protocol. Yet another example is that the base station can determine the beam mapping scheme corresponding to the UE based on condition parameters; these condition parameters can be any of the following: channel conditions, load conditions, etc. Yet another example is that the base station can determine the beam mapping scheme corresponding to the UE based on pre-stored parameters; these pre-stored parameters can be any of the following: UE class, UE ID, etc.

[0113] Optionally, the beam mapping scheme includes a mapping pattern and / or time unit between the transmission corresponding beam and time unit based on multiple TRP. The mapping pattern between the transmission corresponding beam and time unit based on multiple TRP can be one of the following, but is not limited to the following possibilities:

[0114] 1) Periodic mapping: The beams corresponding to the two TCIs (transmission configuration indications) (represented by the beam direction TCI state, labeled as TCI 1 and TCI 2) are sequentially and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are cyclically mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0115] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0116] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0117] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0118] For the aforementioned time units, the options can be one of the following, but are not limited to the following possibilities:

[0119] 1) Nominal repetition;

[0120] 2) Actual repetition;

[0121] 3) Slot-level mapping.

[0122] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0123] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi-TRP based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0124] Figure 3 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by the UE. In this method, the base station schedules the UE's TRP operating mode and beam mapping scheme. The UE learns whether the TRP operating mode specified by the base station is single-TRP transmission or multi-TRP based transmission, as well as the beam mapping scheme, and transmits data on the uplink channel accordingly.

[0125] like Figure 3 As shown, the method may include the following steps.

[0126] Step 301: Receive the first group message sent by the base station.

[0127] The first group of messages carries information indicating the TRP operating mode. The TRP operating mode is either based on a single TRP transmission or based on multiple TRP transmissions.

[0128] In some embodiments of this disclosure, the message may be downlink control information (DCI) or other signaling transmitted on the PDCCH, or it may be signaling transmitted on the PDSCH. The specific form of the message is not limited in this embodiment. That is, in some embodiments of this disclosure, the first group message may exemplary be a first group DCI. The first group message is a group message carrying indication information of the TRP operating mode, generated by the base station after determining a suitable TRP operating mode for the UE from single-TRP-based transmission and multi-TRP-based transmission modes based on parameters. In some embodiments, the parameters may include any of the following: beam management, or CSI measurements obtained by channel quality measurements of uplink / downlink channel states, scheduling TRP operating modes, etc.

[0129] The first group message is sent by the base station to a group of UEs, including the UE executing this embodiment. The UE has received configuration information sent by the base station through higher-layer signaling in advance, thereby knowing the information bit position of the UE in the first group DCI and the RNTI used for descrambling. After receiving the first group DCI, the UE descrambles according to the known RNTI and reads its own corresponding information bit position to obtain the TRP working mode corresponding to the UE.

[0130] Step 302: Receive a first specific message for the UE sent by the base station.

[0131] The first specific message is sent to the UE and is used to dynamically configure the UE. The first specific message carries data scheduling information, which includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission. When the TRP working mode is based on multi-TRP transmission, the first specific message also includes beam mapping scheme indication information.

[0132] In some embodiments of this disclosure, the first specific message may be a DCI, i.e., a first specific DCI.

[0133] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0134] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0135] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0136] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0137] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0138] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0139] 1) Nominal repetition;

[0140] 2) Actual repetition;

[0141] 3) Slot-level mapping.

[0142] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0143] Step 303: Decode the first specific message according to the decoding strategy corresponding to the TRP working mode in the first group message.

[0144] After determining the TRP operating mode corresponding to the UE, the UE can know the bit position of the specific information field to be read in the first specific message (e.g., the first specific DCI) sent by the base station through the downlink channel (e.g., PDCCH or PDSCH). This is because the UE has pre-configured a decoding strategy for the first specific message of the UE under different TRP operating modes. The decoding strategy indicates the bit position of the specific information field to be read by the UE. The UE decodes based on the decoding strategy and reads the corresponding bit position.

[0145] If the UE's TRP operating mode is based on multi-TRP transmission, then decoding the first specific message yields beam mapping scheme indication information and data scheduling information, such as data transmission information based on codebook transmission or data transmission information based on non-codebook transmission. If the UE's TRP operating mode is based on single-TRP transmission, then decoding the first specific message yields data scheduling information.

[0146] Optionally, the indication information for the beam mapping scheme can be an identifier occupying several bits, corresponding to the mapping pattern in the beam mapping scheme, or corresponding to a time unit, or corresponding to a combination of the mapping pattern and the time unit. Specifically, there are at least the following possible implementations for determining the specific mapping scheme based on the identifier:

[0147] In one possible implementation, the base station pre-transmits either a mapping pattern or a time unit, thus pre-configuring either the mapping pattern or the time unit for the UE. The base station also sends or predefines a mapping relationship between an identifier and the other of the mapping pattern and time unit to the UE, allowing the UE to determine the corresponding mapping pattern or time unit based on the identifier in the first specific message.

[0148] For example, the base station configures a mapping pattern via RRC signaling, which, along with other higher-layer signaling, establishes the correspondence between identifiers and time units. Upon receiving a first specific message (e.g., a first specific DCI), the UE determines the corresponding time unit using the identifier within that message. The specific correspondence between identifiers and time units is shown in Table 1 below.

[0149] 1 Nominal transmission timing 2 Actual transmission timing 3 Map by time slot

[0150] Table 1 shows one of the correspondences between identifiers and time units.

[0151] It is understood that each element and each correspondence in Table 1 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 1. The value of each element and each correspondence is independent of any other element value or correspondence in Table 1. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 1 is an independent embodiment.

[0152] For example, the base station configures the time unit through RRC signaling, and configures the correspondence between identifiers and mapping patterns through this RRC signaling or other higher-layer signaling. After receiving the first specific DIC, the UE determines the corresponding mapping pattern through the identifier in the first specific DIC.

[0153] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling, or the UE predefines the correspondence between identifiers and beam mapping schemes. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifier in the first specific DCI.

[0154] 0 Alternate mapping to nominal transmission timing 1 Alternate mapping to actual transmission timing 2 Continuous mapping to actual transmission timing 3 Continuous mapping to actual transmission timing …… …… 6 Bit mapping to actual transmission timing 7 Bits mapped to different time slots

[0155] Table 2 shows the correspondence between identifiers and beam mapping schemes.

[0156] It is understood that each element and each correspondence in Table 2 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 2. The value of each element and each correspondence is independent of any other element value or correspondence in Table 2. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 2 is an independent embodiment.

[0157] As a third possible implementation, the base station pre-transmits a beam mapping scheme, or predefines a beam mapping scheme for the UE, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. Whether to adopt the mapping pattern and / or time unit is determined based on the identifier carried in the first specific DCI. In some embodiments, the base station can transmit the beam mapping scheme via higher-layer signaling.

[0158] Step 304: Based on the decoded first specific message, send uplink transmission in the uplink channel in the TRP working mode.

[0159] In some embodiments of this disclosure, the specific message may be a specific DCI.

[0160] In some embodiments, the uplink channel is PUSCH or PUCCH; preferably, it is PUSCH.

[0161] In response to the TRP working mode being a single TRP-based transmission, data scheduling information can be obtained from the decoded first specific DCI, and data is sent in the PUSCH using this single TRP-based transmission according to the data scheduling information.

[0162] or

[0163] In response to the TRP working mode being a multi-TRP based transmission, data scheduling information can be obtained from the decoded first specific DCI, and a beam mapping scheme can be determined. Based on the beam mapping scheme and the data scheduling information, data is transmitted in the PUSCH using this multi-TRP based transmission.

[0164] Optionally, the UE sends uplink transmissions to the base station on the PUSCH. In this embodiment of the disclosure, the uplink transmission can be signaling, data, or a mixed signaling / data transmission.

[0165] Optionally, the UE transmits uplink data on the PUCCH. In this embodiment of the disclosure, the uplink transmission can be signaling, data, or a combination of signaling and data transmission.

[0166] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi-TRP based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0167] Figure 4 This is a flowchart illustrating another data transmission method provided in this embodiment of the invention, executed by the UE. In this method, the base station schedules the UE's TRP operating mode and beam mapping scheme. The UE indirectly learns whether the TRP operating mode specified by the base station is single-TRP transmission or multi-TRP based transmission, and directly learns the beam mapping scheme, and accordingly transmits data on the uplink channel.

[0168] like Figure 4 As shown, the method may include the following steps.

[0169] Step 401: Receive the second group message sent by the base station.

[0170] The second group of messages carries indication information about the beam mapping scheme.

[0171] The first group message can be downlink control information (DCI) or other signaling transmitted on the PDCCH, or it can be signaling transmitted on the PDSCH. In this embodiment, the specific form of the message is not limited. That is, in some embodiments, the second group message can, for example, be a second group DCI.

[0172] The second group message is a group message generated by the base station after determining a suitable beam mapping scheme for the UE from a variety of candidate beam mapping schemes based on parameters. This group message carries indication information of the UE's beam mapping scheme. In some embodiments, the parameters can be at least one of the following: beam management, CSI measurements obtained from channel quality measurements of uplink / downlink channel states, and beam mapping scheme scheduling.

[0173] The second group message is sent by the base station to a group of UEs, including the UE executing this embodiment. The UE has received configuration information sent by the base station in advance, thereby knowing the information bit position of the UE in the second group DCI, as well as the RNTI used for descrambling. After receiving the second group DCI, the UE descrambles according to the known RNTI and reads its own corresponding information bit position to obtain the beam mapping scheme corresponding to the UE.

[0174] In some embodiments, the UE determines the information bit position corresponding to the UE in the first group message and the RNTI used for descrambling based on configuration information, communication protocol, condition parameters, or pre-stored parameters received from the base station. In some embodiments, the first group message is a bitmap with a first number of bits, where each bit corresponds to one or more UEs to indicate the RNTI used for descrambling for the one or more UEs. In some embodiments, the UE can determine the bit corresponding to the UE based on configuration information sent by a higher-layer base station. In other embodiments, the UE can determine the bit corresponding to the UE based on a corresponding communication protocol. In still other embodiments, the UE can determine the bit corresponding to the UE based on condition parameters, where the condition parameters can be any of the following: channel conditions, load conditions, etc. In yet other embodiments, the UE can determine the bit corresponding to the UE based on pre-stored parameters, where the pre-stored parameters can be any of the following: UE class, UE ID, etc.

[0175] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0176] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0177] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0178] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0179] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0180] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0181] 1) Nominal repetition;

[0182] 2) Actual repetition;

[0183] 3) Slot-level mapping.

[0184] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0185] Step 402: Determine the corresponding TRP working mode based on the beam mapping scheme indication information carried in the second group message.

[0186] Optionally, the indication information for the beam mapping scheme can be an identifier occupying several bits, which has a correspondence with the beam mapping scheme and the TRP. Based on this identifier, it can correspond to the mapping pattern and TRP operating mode in the beam mapping scheme, or to the time unit and TRP operating mode, or to a combination of the mapping pattern and time unit and the TRP operating mode.

[0187] The method of determining the corresponding mapping scheme and TRP working mode based on identifiers has at least the following possible implementations:

[0188] As a first possible implementation, the base station pre-configures one of the mapping pattern and time unit for the UE via higher-layer signaling, such as RRC signaling, or pre-defines one of the mapping pattern and time unit for the UE. During scheduling, the base station sends the correspondence between the identifier and the other of the mapping pattern and time unit via this higher-layer signaling, so that the UE can determine the corresponding mapping pattern or time unit based on the identifier in the second group DCI.

[0189] For example, the base station configures a mapping pattern via RRC signaling, which, or other higher-layer signaling, configures the correspondence between identifiers, time units, and TRP operating modes. After receiving the second group DCI, the UE determines the corresponding time unit and TRP operating mode using the identifiers in the second group DCI. The specific correspondence between identifiers, time units, and TRP operating modes is shown in Table 3 below.

[0190] 0 None Transmission based on a single TRP 1 Nominal transmission timing Multi-TRP based transmission 2 Actual transmission timing Multi-TRP based transmission 3 Map by time slot Multi-TRP based transmission

[0191] Table 3 shows the correspondence between identifiers, time units, and TRP operating modes.

[0192] It is understood that each element and each correspondence in Table 3 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 3. The value of each element and each correspondence is independent of any other element value or correspondence in Table 3. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 3 is an independent embodiment.

[0193] For example, the base station configures the time unit via RRC signaling, and configures the correspondence between identifiers, mapping patterns, and TRP operating modes via this RRC signaling or other higher-layer signaling. After receiving the second group DCI, the UE determines the corresponding mapping pattern and TRP operating mode using the identifier in the second group DCI.

[0194] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling, or the UE pre-defines the correspondence between identifiers and beam mapping schemes. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifiers in the second group of DCIs.

[0195]

[0196]

[0197] Table 4 shows the correspondence between identifiers, beam mapping schemes, and TRP operating modes.

[0198] It is understood that each element and each correspondence in Table 4 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 4. The value of each element and each correspondence is independent of any other element value or correspondence in Table 4. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 4 is an independent embodiment.

[0199] As a third possible implementation, the base station pre-transmits the beam mapping scheme via higher-layer signaling, or predefines the beam mapping scheme for the UE, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. The choice of whether to adopt the mapping pattern and / or time unit is determined based on the identifier carried in the second group DCI.

[0200] Step 403: Decode the specific DCI sent by the base station for the UE according to the TRP working mode.

[0201] The UE has pre-configured decoding strategies for different TRP working modes. These decoding strategies indicate the bit positions of specific information fields that the UE needs to read. The UE decodes based on these decoding strategies to read the bit positions corresponding to specific DCIs in order to obtain data scheduling information, such as data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

[0202] For example, when the UE is facing a multi-TRP-based transmission, the 2-bit SRI or TPMI / RI indication field is directly extended to the 4-bit field when transmitting with two TRP beams.

[0203] Step 404: Based on the decoded specific message, transmit data in the PUSCH using the TRP operating mode and beam mapping scheme.

[0204] In some embodiments of this disclosure, the specific message may be a specific DCI.

[0205] In response to the TRP working mode being a single TRP-based transmission, data scheduling information can be obtained based on the decoded specific DCI. Based on this data scheduling information, data is transmitted in the uplink channel (e.g., PUSCH or PUCCH) using this single TRP-based transmission.

[0206] or

[0207] In response to the TRP operating mode being a multi-TRP-based transmission, data scheduling information can be obtained from the decoded specific message. Based on the beam mapping scheme determined in the preceding steps and the data scheduling information, data is transmitted in the uplink channel (e.g., PUSCH or PUCCH) using the multi-TRP-based transmission.

[0208] In some embodiments, the uplink channel is preferably a PUCCH.

[0209] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0210] Figure 5 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by the UE. In this method, the base station schedules the UE's TRP operating mode and beam mapping scheme. The UE learns whether the TRP operating mode specified by the base station is single-TRP transmission or multi-TRP based transmission, as well as the beam mapping scheme, and transmits data on the uplink channel accordingly.

[0211] like Figure 5 As shown, the method may include the following steps.

[0212] Step 501: Receive a second specific message for the UE sent by the base station on the PDCCH.

[0213] The second specific message carries indication information of the beam mapping scheme and / or indication information of the TRP operating mode.

[0214] The second specific message is a specific message generated by the base station after scheduling a beam mapping scheme based on beam management or CSI measurements obtained from channel quality measurements of uplink / downlink channel states, in order to determine a suitable beam mapping scheme and / or TRP operating mode from a variety of candidate beam mapping schemes. This message carries indication information of the UE's beam mapping scheme and / or TRP operating mode.

[0215] In some embodiments of this disclosure, the second specific message may be a specific DCI, i.e., a second specific DCI.

[0216] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0217] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0218] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0219] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0220] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0221] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0222] 1) Nominal repetition;

[0223] 2) Actual repetition;

[0224] 3) Slot-level mapping.

[0225] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0226] Furthermore, after receiving the second specific message, the UE can use several predefined or pre-configured candidate decoding strategies to attempt decoding until successful decoding, so as to obtain the beam mapping scheme indication information and / or TRP working mode indication information carried by the second specific message.

[0227] Optionally, the indication information for the beam mapping scheme can be an identifier occupying several bits, corresponding to the mapping pattern in the beam mapping scheme, or corresponding to a time unit, or corresponding to a combination of the mapping pattern and the time unit. Specifically, there are at least the following possible implementations for determining the specific mapping scheme based on the identifier:

[0228] In one possible implementation, the base station pre-transmits one of the mapping pattern and time unit via higher-layer signaling, such as RRC signaling, thus pre-configuring the UE with either the mapping pattern or the time unit. The base station also transmits, via the same higher-layer signaling, a mapping relationship between the UE's predefined identifier and the other of the mapping pattern and time unit, allowing the UE to determine the corresponding mapping pattern or time unit based on the identifier in the second specific DCI.

[0229] For example, the base station configures a mapping pattern via RRC signaling, which, along with other higher-layer signaling, establishes the correspondence between identifiers and time units. Upon receiving the second specific DCI, the UE determines the corresponding time unit using the identifier within the second specific DCI. The specific correspondence between identifiers and time units is shown in Table 5.

[0230] 0 None 1 Nominal transmission timing 2 Actual transmission timing 3 Map by time slot

[0231] Table 5. Correspondence between identifiers and time units (Part 2)

[0232] It is understood that each element and each correspondence in Table 5 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 5. The value of each element and each correspondence is independent of any other element value or correspondence in Table 5. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 5 is an independent embodiment.

[0233] It should be noted that in Table 5, "none" corresponds to the single TRP-oriented transmission mode, indicating that the base station has not selected a time unit.

[0234] For example, the base station configures the time unit through RRC signaling, and configures the correspondence between identifiers and mapping patterns through this RRC signaling or other higher-layer signaling. After receiving the second specific DCI, the UE determines the corresponding mapping pattern through the identifier in the second specific DCI.

[0235] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling, or the UE predefines the correspondence between identifiers and beam mapping schemes. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifiers in the second specific DCI. Table 6 shows the correspondence between identifiers and beam mapping schemes.

[0236] 0 None 1 Periodic mapping to nominal transmission timing 2 Periodic mapping to actual transmission timing 3 Continuous mapping to actual transmission timing 4 Continuous mapping to actual transmission timing …… …… 7 Bit mapping to actual transmission timing

[0237] Table 6 shows one of the correspondences between identifiers and beam mapping schemes.

[0238] It is understood that each element and each correspondence in Table 6 exists independently; these elements and correspondences are listed in the same table as an example, but this does not mean that all elements and correspondences in the table must exist simultaneously as shown in Table 6. The value of each element and each correspondence is independent of any other element value or correspondence in Table 6. Therefore, those skilled in the art will understand that the value of each element and each correspondence in Table 6 is an independent embodiment.

[0239] It should be noted that in Table 6, "none" corresponds to the single TRP-oriented transmission mode, indicating that the base station has not selected a beam mapping scheme, that is, the combination of mapping pattern and time has not been selected.

[0240] As a third possible implementation, the base station pre-transmits the beam mapping scheme via higher-layer signaling, or predefines the beam mapping scheme for the UE, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. The decision to adopt the mapping pattern and / or time unit is made based on the identifier carried in the second specific DCI.

[0241] Step 502: Transmit data on the uplink channel in the TRP operating mode and / or beam mapping scheme.

[0242] In some embodiments, the uplink channel can be PUSCH or PUCCH; preferably, it can be PUSCH.

[0243] Optionally, the second specific message may also carry data scheduling information, which includes: data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

[0244] In response to the TRP operating mode being a single TRP-based transmission, data is sent in the PUSCH using this single TRP-based transmission according to the data scheduling information;

[0245] or

[0246] In response to the TRP operating mode being a multi-TRP-based transmission, data is transmitted on the PUSCH using the multi-TRP-based transmission according to the beam mapping scheme determined in the preceding steps and the data scheduling information.

[0247] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0248] Figure 6 This is a flowchart of a data transmission method provided in an embodiment of the present invention, executed by a base station.

[0249] like Figure 6 As shown, the method may include the following steps.

[0250] Step 601: Send downlink control information (DCI) to the user equipment (UE) on the physical downlink control channel (PDCCH).

[0251] The DCI carries indication information of the TRP operating mode and / or beam mapping scheme. The TRP operating mode is based on single TRP transmission or multi-TRP transmission. The beam mapping scheme includes a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information of the time units.

[0252] Optionally, the base station performs scheduling based on Channel State Indicator (CSI) measurements to determine at least one of the TRP operating mode and beam mapping scheme used on the PUSCH. The base station can also determine at least one of the TRP operating mode and beam mapping scheme used on the PUSCH based on beam management. Since there is a certain correlation between the retransmission mechanism used by the UE and the TRP operating mode and beam mapping scheme, the base station's scheduling of the TRP operating mode and / or beam mapping scheme achieves optimized resource allocation, thereby improving communication quality.

[0253] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0254] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0255] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0256] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0257] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0258] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0259] 1) Nominal repetition;

[0260] 2) Actual repetition;

[0261] 3) Slot-level mapping.

[0262] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0263] Step 602: Receive data transmitted by the UE on the PUSCH in the TRP operating mode and / or beam mapping scheme.

[0264] After scheduling the UE, the base station receives the data sent by the UE on the PUSCH based on the TRP working mode and / or beam mapping scheme.

[0265] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0266] Figure 7 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, which is executed by a base station.

[0267] like Figure 7 As shown, the method includes:

[0268] Step 701: Send the first group DCI to the UE on the PDCCH.

[0269] The first group of DCIs carries indication information about the TRP operating mode. The TRP operating mode is either based on a single TRP transmission or based on multiple TRP transmissions.

[0270] The first group DCI is generated by the base station after scheduling the TRP operating mode based on the CSI measurement obtained by beam management or by measuring the uplink / downlink channel status, in order to determine a suitable TRP operating mode for the UE from single-TRP-based transmission and multi-TRP-based transmission modes. The group DCI carries the indication information of the TRP operating mode.

[0271] The first group is a set of UEs sent by the base station, including the UE executing this embodiment. The UE has previously received configuration information sent by the base station via higher-layer signaling, thus knowing the information bit position corresponding to the UE in the first group DCI and the RNTI used for descrambling. After receiving the first group DCI, the UE descrambles according to the known RNTI and reads its own corresponding information bit position to obtain the TRP operating mode corresponding to the UE.

[0272] Step 702: Receive data sent by the UE on the PUSCH in the TRP working mode.

[0273] After scheduling the UE, the base station receives the data sent by the UE on the PUSCH based on the TRP working mode.

[0274] It should be noted that when the TRP operating mode is based on multi-TRP transmission, the beam mapping scheme used by the UE can be pre-configured to the UE by the base station through higher-layer signaling, such as RRC signaling. Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between the beam and the time unit corresponding to multi-TRP transmission can be one of the following, but is not limited to the following possibilities:

[0275] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0276] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0277] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0278] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0279] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0280] 1) Nominal repetition;

[0281] 2) Actual repetition;

[0282] 3) Slot-level mapping.

[0283] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0284] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0285] Figure 8 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by a base station.

[0286] like Figure 8 As shown, the method may include the following steps.

[0287] Step 801: Send the first group DCI to the UE on the PDCCH.

[0288] The first group of DCIs carries indication information about the TRP operating mode. The TRP operating mode is either based on a single TRP transmission or based on multiple TRP transmissions.

[0289] The first group DCI is generated by the base station after scheduling the TRP operating mode based on the CSI measurement obtained by beam management or by measuring the uplink / downlink channel status, in order to determine a suitable TRP operating mode for the UE from single-TRP-based transmission and multi-TRP-based transmission modes. The group DCI carries the indication information of the TRP operating mode.

[0290] The first group is a set of UEs sent by the base station, including the UE executing this embodiment. The UE has previously received configuration information sent by the base station via higher-layer signaling, thus knowing the information bit position corresponding to the UE in the first group DCI and the RNTI used for descrambling. After receiving the first group DCI, the UE descrambles according to the known RNTI and reads its own corresponding information bit position to obtain the TRP operating mode corresponding to the UE.

[0291] Step 802: Send the first specific DCI for the UE to the UE.

[0292] The first specific DCI is used to decode using the decoding strategy corresponding to the TRP working mode in the first group of DCIs, and carries the indication information of the beam mapping scheme.

[0293] The first specific DCI is sent by the base station to the UE for dynamic configuration of the UE. The first specific DCI carries data scheduling information, which includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission. When the TRP working mode is based on multi-TRP transmission, the first specific DCI also includes beam mapping scheme indication information.

[0294] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0295] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0296] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0297] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0298] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0299] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0300] 1) Nominal repetition;

[0301] 2) Actual repetition;

[0302] 3) Slot-level mapping.

[0303] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0304] In order for the UE to know the corresponding beam mapping scheme based on the indication information, in this embodiment, the base station can pre-configure the beam mapping scheme corresponding to the indication information to the UE through higher-layer signaling, such as RRC signaling.

[0305] Optionally, the indication information for the beam mapping scheme can be an identifier occupying several bits, corresponding to the mapping pattern in the beam mapping scheme, or corresponding to a time unit, or corresponding to a combination of the mapping pattern and the time unit. Specifically, there are at least the following possible implementations for determining the specific mapping scheme based on the identifier:

[0306] In one possible implementation, the base station pre-transmits one of the mapping pattern and time unit via higher-layer signaling, such as RRC signaling, thus pre-configuring the UE with either the mapping pattern or the time unit. The base station also transmits, via the same higher-layer signaling, a mapping relationship between the UE's predefined identifier and the other of the mapping pattern and time unit, allowing the UE to determine the corresponding mapping pattern or time unit based on the identifier in the first specific DCI.

[0307] For example, the base station configures a mapping pattern via RRC signaling, which, along with other higher-layer signaling, establishes the correspondence between identifiers and time units. Upon receiving the first specific DIC, the UE determines the corresponding time unit using the identifier within that first specific DIC.

[0308] For example, the base station configures the time unit through RRC signaling, and configures the correspondence between identifiers and mapping patterns through this RRC signaling or other higher-layer signaling. After receiving the first specific DIC, the UE determines the corresponding mapping pattern through the identifier in the first specific DIC.

[0309] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling, or the UE predefines the correspondence between identifiers and beam mapping schemes. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifier in the first specific DCI.

[0310] As a third possible implementation, the base station pre-configures a beam mapping scheme for the UE via higher-layer signaling, or predefines a beam mapping scheme for the UE, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. Based on the identifier carried in the first specific DCI, it is determined whether to adopt the mapping pattern and / or time unit.

[0311] Step 803: Receive data sent by the UE on the PUSCH in the TRP working mode and beam mapping scheme.

[0312] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi-TRP based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0313] Figure 9 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by a base station.

[0314] like Figure 9 As shown, the method includes:

[0315] Step 901: Send the second group DCI to the UE on the PDCCH.

[0316] The second group of DCIs carries indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP working mode.

[0317] The second group DCI is generated by the base station after scheduling beam mapping schemes based on beam management or CSI measurements obtained from uplink / downlink channel states, in order to determine a suitable beam mapping scheme for the UE from a variety of candidate beam mapping schemes. The group DCI carries the indication information of the UE's beam mapping scheme.

[0318] The second group DCI is sent by the base station to a group of UEs, including the UE executing this embodiment. The UE has received configuration information sent by the base station via higher-layer signaling in advance, thereby knowing the information bit position of the UE in the second group DCI, as well as the RNTI used for descrambling. After receiving the second group DCI, the UE descrambles according to the known RNTI and reads its own corresponding information bit position to obtain the beam mapping scheme corresponding to the UE.

[0319] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0320] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0321] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0322] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0323] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0324] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0325] 1) Nominal repetition;

[0326] 2) Actual repetition;

[0327] 3) Slot-level mapping.

[0328] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0329] Optionally, the beam mapping scheme indication information can be an identifier occupying several bits, corresponding to the mapping pattern in the beam mapping scheme, or corresponding to a time unit, or corresponding to a combination of the mapping pattern and the time unit. The base station has at least the following possible implementation methods for configuring the mapping scheme for the UE:

[0330] As a first possible implementation, the base station pre-configures one of the mapping pattern and time unit for the UE via higher-layer signaling, such as RRC signaling. During scheduling, the base station sends the mapping relationship between the identifier and the other of the mapping pattern and time unit via this higher-layer signaling, so that the UE can determine the corresponding mapping pattern or time unit based on the identifier in the second group DCI.

[0331] For example, the base station configures a mapping pattern via RRC signaling, which, or other higher-layer signaling, configures the correspondence between identifiers, time units, and TRP operating modes. This allows the UE to determine the corresponding time unit and TRP operating mode after receiving the second group DCI, using the identifiers within the second group DCI.

[0332] For example, the base station configures the time unit via RRC signaling, and configures the correspondence between identifiers, mapping patterns, and TRP operating modes via this RRC signaling or other higher-layer signaling. This allows the UE to determine the corresponding mapping pattern and TRP operating mode using the identifiers in the second group DCI after receiving it.

[0333] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifiers in the second group of DCIs.

[0334] As a third possible implementation, the base station pre-transmits a beam mapping scheme via higher-layer signaling, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. The choice of whether to adopt this mapping pattern and / or time unit is determined based on the identifier carried in the second group DCI.

[0335] Step 902: Receive data sent by the UE on the PUSCH in the TRP working mode and beam mapping scheme.

[0336] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0337] Figure 10 This is a flowchart illustrating another data transmission method provided in an embodiment of the present invention, executed by a base station.

[0338] like Figure 10 As shown, the method may include the following steps.

[0339] Step 1001: Send a second specific DCI for the UE to the UE on the PDCCH.

[0340] The second specific DCI carries indication information of the beam mapping scheme and / or indication information of the TRP operating mode.

[0341] The second specific DCI is a specific DCI generated by the base station after scheduling beam mapping schemes based on beam management or CSI measurements obtained from uplink / downlink channel states, to determine a suitable beam mapping scheme and / or TRP operating mode from a variety of candidate beam mapping schemes, and carrying indication information of the UE's beam mapping scheme and / or TRP operating mode.

[0342] Optionally, the beam mapping scheme includes a mapping pattern and a time unit. The mapping pattern between beams and time units for multi-TRP-based transmission can be one of the following, but is not limited to:

[0343] 1) Periodic mapping: The beams corresponding to the two TCIs (represented by the beam direction, TCI states are labeled as TCI 1 and TCI 2) are sequentially mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI2 are sequentially mapped to 4 time units, that is, the mapping order is TCI 1, TCI2, TCI1 and TCI2.

[0344] 2) Continuous mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are continuously and cyclically mapped to multiple configured time units. For example, in the case of 4 time units, TCI 1 and TCI 2 are repeated a certain number of times. Whenever one TCI reaches the number of repetitions, it is switched to the other TCI for mapping. For example, in the case of 4 time units, the mapping order is TCI1, TCI1, TCI2 and TCI2. Another example is in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI2, TCI2, TCI 1, TCI1, TCI2 and TCI2.

[0345] 3) Half-half mapping: The beams TCI 1 and TCI 2 corresponding to the two TCIs are mapped to the first half time unit and the second half time unit in multiple time units, respectively. For example, in the case of 8 time units, the mapping order is TCI 1, TCI1, TCI1, TCI1, TCI 2, TCI2, TCI2 and TCI2.

[0346] 4) Bit mapping: The bitmap indicates the mapping pattern between the beam and time unit for each specific TRP.

[0347] Optionally, for the aforementioned time unit, the options can be one of the following, but are not limited to the following possibilities:

[0348] 1) Nominal repetition;

[0349] 2) Actual repetition;

[0350] 3) Slot-level mapping.

[0351] It should be noted that when the above text mentions transmission based on multiple TRPs, it usually uses two TRPs as an example. This is because the current related technologies for transmission cooperation based on multiple TRPs are limited to a maximum of two TRPs. This embodiment can be applied to the case of transmission based on more TRPs, and is not limited thereto.

[0352] Optionally, the beam mapping scheme indication information can be an identifier occupying several bits, corresponding to the mapping pattern in the beam mapping scheme, or corresponding to a time unit, or corresponding to a combination of the mapping pattern and the time unit. Specifically, the base station has at least the following possible implementation methods for configuring the mapping scheme for the UE:

[0353] In one possible implementation, the base station pre-transmits one of the mapping pattern and time unit via higher-layer signaling, such as RRC signaling, thus pre-configuring the UE with either the mapping pattern or the time unit. The base station also transmits, via the same higher-layer signaling, a mapping relationship between the UE's predefined identifier and the other of the mapping pattern and time unit, allowing the UE to determine the corresponding mapping pattern or time unit based on the identifier in the second specific DCI.

[0354] For example, the base station configures a mapping pattern via RRC signaling, which, along with other higher-layer signaling, establishes the correspondence between identifiers and time units. Upon receiving the second specific DCI, the UE determines the corresponding time unit using the identifier within that second specific DCI.

[0355] It should be noted that the identifier may have specific values ​​corresponding to the single TRP transmission mode, indicating that the base station has not selected a time unit.

[0356] For example, the base station configures the time unit through RRC signaling, and configures the correspondence between identifiers and mapping patterns through this RRC signaling or other higher-layer signaling. After receiving the second specific DCI, the UE determines the corresponding mapping pattern through the identifier in the second specific DCI.

[0357] As a second possible implementation, the base station pre-transmits the correspondence between identifiers and beam mapping schemes via higher-layer signaling, such as RRC signaling, or the UE predefines the correspondence between identifiers and beam mapping schemes. This beam mapping scheme is a combination of mapping patterns and time units, allowing the UE to determine the corresponding combination of mapping patterns and time based on the identifiers in the second specific DCI.

[0358] It should be noted that the identifier may have specific values ​​corresponding to the single TRP transmission mode, indicating that the base station has not selected a beam mapping scheme, that is, has not selected a combination of mapping pattern and time.

[0359] As a third possible implementation, the base station pre-transmits the beam mapping scheme via higher-layer signaling, or predefines the beam mapping scheme for the UE, including a possible mapping pattern and / or a possible time unit between the transmission corresponding beam and time unit based on multiple TRPs. The decision to adopt the mapping pattern and / or time unit is made based on the identifier carried in the second specific DCI.

[0360] Step 1002: Receive data sent by the UE on the PUSCH in the TRP working mode and beam mapping scheme.

[0361] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0362] Corresponding to the data transmission methods provided in the above embodiments, the present invention also provides a data transmission device. Since the data transmission device provided in the embodiments of the present invention corresponds to the methods provided in the above embodiments, the implementation methods of the data transmission methods are also applicable to the data transmission device provided in this embodiment, and will not be described in detail in this embodiment. Figures 11-16 This is a schematic diagram of the data transmission device proposed according to the present invention.

[0363] Figure 11 This is a schematic diagram of a data transmission device provided in an embodiment of the present invention. The device is applied to a user equipment (UE).

[0364] like Figure 11 As shown, the data transmission device 110 includes: an acquisition module 1101 and a transmission module 1102, wherein:

[0365] The acquisition module 1101 is configured to acquire control signaling sent by the base station; wherein the control signaling carries indication information of the Transmission Access Point (TRP) operating mode and / or beam mapping scheme, the TRP operating mode being either single-TRP-based transmission or multi-TRP-based transmission, and the beam mapping scheme including a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units; the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information about the time units;

[0366] The transmission module 1102 is configured to send uplink transmissions to the base station in the TRP operating mode and / or beam mapping scheme.

[0367] In embodiments of the present invention, optionally, such as Figure 12 As shown, the acquisition module 1101 includes: a first receiving unit 11011, configured to receive a first group message sent by the base station on the downlink channel; wherein the first group message carries indication information of the TRP working mode.

[0368] In some embodiments of this disclosure, the message may be downlink control information (DCI) or other signaling transmitted on the PDCCH, or it may be signaling transmitted on the PDSCH. The specific form of the message is not limited in this embodiment. That is, in some embodiments of this disclosure, the first group message may, for example, be a first group DCI.

[0369] In some embodiments, the downlink channel may be a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH). Preferably, the downlink channel may be a PDCCH.

[0370] In an embodiment of the present invention, the acquisition module 1101 further includes: a second receiving unit 11012, configured to receive a first specific message (e.g., a first specific DCI) sent by the base station for the UE on the downlink channel (e.g., PDCCH or PDSCH); and a decoding unit 11013, configured to decode the first specific message (e.g., the first specific DCI) according to the decoding strategy corresponding to the TRP working mode in the first group message (e.g., the first group DCI) to obtain the indication information of the beam mapping scheme.

[0371] In one embodiment of the present invention, the apparatus further includes a processing module 1103, configured to: configure a beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or predefine a beam mapping scheme corresponding to the indication information for the UE.

[0372] In embodiments of the present invention, such as Figure 13 As shown, the acquisition module 1101 includes: a third receiving unit 11014, configured to receive a second group message (e.g., a second group DCI) sent by the base station on a downlink channel (e.g., PDCCH or PDSCH); wherein the second group message carries indication information of the beam mapping scheme; and a determining unit 11015, configured to determine the corresponding TRP working mode according to the indication information of the beam mapping scheme carried in the second group message.

[0373] In embodiments of the present invention, such as Figure 14 As shown, the acquisition module 1101 is configured as: a fourth receiving unit 11016, used to receive a second specific message (e.g., a second specific DCI) sent by the base station on the downlink channel (e.g., PDCCH or PDSCH) for the UE; wherein the second specific message carries indication information of the beam mapping scheme and / or indication information of the TRP working mode.

[0374] In an embodiment of the present invention, the second specific message carries indication information of the TRP working mode, and the processing module 1103 is configured to: configure a beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; or predefine a beam mapping scheme corresponding to the indication information for the UE.

[0375] In embodiments of the present invention, the beam mapping scheme indication information carried in the control signaling represents either the combination of a selected mapping pattern and a time unit by the base station, or it represents that the base station has not selected a beam mapping scheme. In embodiments of the present invention, such as... Figure 15 As shown, further, in one possible implementation of the present invention, the beam mapping scheme indication information carried by the control signaling represents one of the mapping pattern and the time unit; the apparatus further includes: a configuration module 1104, configured to configure the other of the mapping pattern and the time unit according to the higher-layer signaling sent by the base station.

[0376] In embodiments of the present invention, such as Figure 16 As shown, the device further includes a decoding module 1105, configured to: use the decoding strategy corresponding to the TRP working mode to decode the specific DCI sent by the base station for the UE, so as to obtain the data scheduling information adopted by the Physical Uplink Shared Channel (PUSCH); wherein, the PUSCH is used to send the data to the base station, and the data scheduling information includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

[0377] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0378] Corresponding to the data transmission methods provided in the above embodiments, the present invention also provides a data transmission device. Since the data transmission device provided in the embodiments of the present invention corresponds to the data transmission methods provided in the above embodiments, the implementation methods of the data transmission methods are also applicable to the data transmission device provided in this embodiment, and will not be described in detail in this embodiment. Figures 17-22 This is a schematic diagram of the data transmission device proposed according to the present invention.

[0379] Figure 17 This is a schematic diagram of the data transmission device provided in an embodiment of the present invention. The device is applied to a base station.

[0380] like Figure 17 As shown, the data transmission device 170 includes: a transmitting module 1701 and a receiving module 1702, wherein:

[0381] The transmitting module 1701 is configured to send control signaling to the user equipment (UE); wherein the control signaling carries indication information of the Transmission Access Point (TRP) operating mode and / or beam mapping scheme, wherein the TRP operating mode is based on single TRP transmission or multi-TRP transmission, and the beam mapping scheme includes a mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information of the time units; the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs and / or information of the time units;

[0382] The receiving module 1702 is configured to receive data transmitted by the UE in the TRP operating mode and / or beam mapping scheme.

[0383] In embodiments of the present invention, such as Figure 18 As shown, the transmitting module 1701 includes: a first transmitting unit 17011, configured to transmit a first group downlink control information (DCI) to the UE on the physical downlink control channel (PDCCH); wherein the first group DCI carries indication information of the TRP operating mode.

[0384] In an embodiment of the present invention, the transmitting module 1701 further includes: a second transmitting unit 17012, configured to transmit a first specific DCI for the UE to the UE; wherein the first specific DCI is used to decode using the decoding strategy corresponding to the TRP working mode in the first group of DCIs, and carries indication information of the beam mapping scheme.

[0385] In an embodiment of the present invention, the apparatus further includes: a first configuration module 1703, configured to send higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0386] In embodiments of the present invention, such as Figure 19 As shown, the transmitting module 1701 includes: a third transmitting unit 17013, configured to transmit a second group DCI to the UE on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP working mode.

[0387] In embodiments of the present invention, such as Figure 20 As shown, the transmitting module 1701 includes: a fourth transmitting unit 17014, configured to transmit a second specific DCI for the UE to the UE on the PDCCH; wherein the second specific DCI carries indication information of the beam mapping scheme and / or indication information of the TRP working mode.

[0388] In an embodiment of the present invention, the second specific DCI carries indication information of the TRP working mode, and the first configuration module 1703 is configured to send higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

[0389] In an embodiment of the present invention, the beam mapping scheme indication information carried by the control signaling indicates either the combination of the mapping pattern and time unit selected by the base station, or the base station not selecting a beam mapping scheme.

[0390] In embodiments of the present invention, such as Figure 21 As shown, the beam mapping scheme indication information carried by the control signaling represents one of the mapping pattern and the time unit; the device further includes: a second configuration module 1704, configured to send the higher-layer signaling to the UE to configure the other of the mapping pattern and the time unit.

[0391] In embodiments of the present invention, such as Figure 22 As shown, the apparatus further includes a scheduling module 1705 configured to: perform scheduling based on channel state CSI measurements to determine at least one of the TRP operating mode and the beam mapping scheme; and / or, beam management to determine at least one of the TRP operating mode and the beam mapping scheme.

[0392] In this embodiment, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi TRP-based transmission on the PUSCH, or the scheduling of beam mapping scheme, which improves the data transmission quality of the PUSCH.

[0393] According to embodiments of the present invention, the present invention also provides a communication device and a readable storage medium.

[0394] like Figure 23The diagram shown is a block diagram of a data transmission apparatus for a physical uplink shared channel according to an embodiment of the present invention. The communication apparatus is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The communication apparatus may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0395] like Figure 23 As shown, the communication device includes one or more processors 1100, a memory 1200, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components are interconnected via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the communication device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple communication devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 23 Take a processor 1100 as an example.

[0396] The memory 1200 is the non-transitory computer-readable storage medium provided by this invention. The memory stores instructions executable by at least one processor to cause the at least one processor to perform the data transmission method provided by this invention. The non-transitory computer-readable storage medium of this invention stores computer instructions for causing a computer to perform the data transmission method provided by this invention.

[0397] Memory 1200, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the data transmission method in the embodiments of the present invention (e.g., appendix). Figure 11 The acquisition module 1101 and transmission module 1102 shown, or the attached... Figure 17 (Showing the sending module 1701 and receiving module 1702). The processor 1100 executes various server functions and data processing by running non-transient software programs, instructions, and modules stored in the memory 1200, thereby implementing the data transmission method in the above method embodiments.

[0398] The memory 1200 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the positioning communication device. Furthermore, the memory 1200 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. Optionally, the memory 1200 may include memory remotely located relative to the processor 1100, and these remote memories can be connected to the positioning communication device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0399] The communication equipment for data transmission via a physical uplink shared channel may further include an input device 1300 and an output device 1400. The processor 1100, memory 1200, input device 1300, and output device 1400 can be connected via a bus or other means. Figure 22 Taking the example of a connection between China and Israel via a bus.

[0400] Input device 1300 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the positioning communication device, such as touch screen, keypad, mouse, trackpad, touchpad, indicator, one or more mouse buttons, trackball, joystick, etc. Output device 1400 may include display device, auxiliary lighting device (e.g., LED), and haptic feedback device (e.g., vibration motor). The display device may include, but is not limited to, liquid crystal display (LCD), light-emitting diode (LED) display, and plasma display. In some embodiments, the display device may be a touch screen.

[0401] Various implementations of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, application-specific integrated circuits (ASICs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include: implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transferring data and instructions to the storage system, the at least one input device, and the at least one output device.

[0402] These computational programs (also referred to as programs, software, software applications, or code) include machine instructions for a programmable processor and can be implemented using high-level procedural and / or object-oriented programming languages, and / or assembly / machine languages. As used herein, the terms “machine-readable medium” and “computer-readable medium” refer to any computer program product, device, and / or apparatus (e.g., disk, optical disk, memory, programmable logic device (PLD)) used to provide machine instructions and / or data to a programmable processor, including machine-readable media that receive machine instructions as machine-readable signals. The term “machine-readable signal” refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0403] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0404] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0405] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other.

[0406] According to the data transmission apparatus of the present invention, after the base station sends a DCI to the UE on the PDCCH, since the DCI carries indication information of the TRP working mode and / or beam mapping scheme, the UE, under the scheduling of the base station, adopts the corresponding TRP working mode and / or beam mapping scheme to send data on the PUSCH. Correspondingly, the base station receives the data sent by the UE on the PUSCH in the TRP working mode and / or beam mapping scheme, thereby realizing the switching of single TRP transmission or multi-TRP based transmission on the PUSCH, or the scheduling of beam mapping scheme, and improving the data transmission quality of the PUSCH.

[0407] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this invention can be achieved, and this is not limited herein.

[0408] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A data transmission method, characterized in that, The method is applied to a user equipment (UE), and the method includes: Acquire control signaling sent by the base station; wherein the control signaling carries indication information of the Transmission Access Point (TRP) working mode and beam mapping scheme, the TRP working mode being either transmission based on a single TRP or transmission based on multiple TRPs, and the beam mapping scheme being used to indicate the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs. Data is transmitted to the base station using the TRP operating mode and beam mapping scheme. The mapping pattern includes at least one of periodic mapping, continuous mapping, half-mapped mapping, and bit mapping. The half-mapped mapping involves two beams corresponding to Transmission Configuration Indicators (TCIs) mapping to the first and second halves of multiple time units, respectively. The time unit is determined in one of the following ways: nominal transmission timing, actual transmission timing, or time slot-level mapping; The acquisition of control signaling sent by the base station includes: Receive the second group DCI transmitted by the base station on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme; Based on the beam mapping scheme indication information carried by the second group of DCIs, the corresponding TRP operating mode is determined.

2. The data transmission method according to claim 1, characterized in that, Before sending data to the base station using the TRP operating mode and beam mapping scheme, the method further includes: Configure the beam mapping scheme corresponding to the indication information according to the higher-layer signaling sent by the base station; Alternatively, a beam mapping scheme corresponding to the indication information can be predefined for the UE.

3. The data transmission method according to any one of claims 1-2, characterized in that, The beam mapping scheme indication information carried in the control signaling indicates either the combination of the selected mapping pattern and time unit by the base station, or the fact that the base station has not selected a beam mapping scheme.

4. The data transmission method according to any one of claims 1-2, characterized in that, The beam mapping scheme indication information carried by the control signaling represents one of the mapping pattern and the time unit; Before sending data to the base station using the TRP operating mode and beam mapping scheme, the method further includes: Configure another of the mapping pattern and the time unit based on the higher-layer signaling sent by the base station.

5. The data transmission method according to any one of claims 1-2, characterized in that, Before sending data to the base station using the TRP operating mode and beam mapping scheme, the following steps are also included: Using the decoding strategy corresponding to the TRP working mode, the specific DCI sent by the base station for the UE is decoded to obtain the data scheduling information used by the Physical Uplink Shared Channel (PUSCH); wherein, the PUSCH is used to send the data to the base station, and the data scheduling information includes data transmission information based on codebook transmission or data transmission information based on non-codebook transmission.

6. A data transmission method, characterized in that, Applied to a base station, the method includes: Send control signaling to user equipment (UE); wherein the control signaling carries indication information of the Transmission Access Point (TRP) operating mode and beam mapping scheme, the TRP operating mode being either transmission based on a single TRP or transmission based on multiple TRPs, and the beam mapping scheme being used to indicate the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs. Receive data transmitted by the UE in the TRP working mode and beam mapping scheme; The mapping pattern includes at least one of periodic mapping, continuous mapping, half-mapped mapping, and bit mapping. The half-mapped mapping involves two beams corresponding to Transmission Configuration Indicators (TCIs) mapping to the first and second halves of multiple time units, respectively. The time unit is determined in one of the following ways: nominal transmission timing, actual transmission timing, or time slot-level mapping; The step of sending control signaling to the user equipment (UE) includes: The second group DCI is sent to the UE on the PDCCH; wherein the second group DCI carries the indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP working mode.

7. The data transmission method according to claim 6, characterized in that, Before receiving the data sent by the UE in the TRP operating mode and beam mapping scheme, the method further includes: Send higher-layer signaling to the UE for configuring the beam mapping scheme corresponding to the indication information.

8. The data transmission method according to any one of claims 6-7, characterized in that, The beam mapping scheme indication information carried in the control signaling indicates either the combination of the selected mapping pattern and time unit by the base station, or the fact that the base station has not selected a beam mapping scheme.

9. The data transmission method according to any one of claims 6-7, characterized in that, The beam mapping scheme indication information carried by the control signaling represents one of the mapping pattern and the time unit; Before receiving the data sent by the UE in the TRP operating mode and beam mapping scheme, the method further includes: Send higher-layer signaling to the UE to configure another of the mapping pattern and the time unit.

10. The data transmission method according to any one of claims 6-7, characterized in that, Before sending control signaling to the user equipment (UE), the process also includes: Scheduling is performed based on Channel State Indicator (CSI) measurements to determine at least one of the TRP operating mode and the beam mapping scheme. And / or, beam management determines at least one of the TRP operating mode and the beam mapping scheme.

11. A data transmission device, characterized in that, The device, applied to a user equipment (UE), includes: The acquisition module is configured to acquire control signaling sent by the base station; wherein the control signaling carries indication information of the Transmission Access Point (TRP) working mode and beam mapping scheme, wherein the TRP working mode is based on single TRP transmission or based on multiple TRP transmission, and the beam mapping scheme is used to indicate the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs. The transmission module is configured to send data to the base station in the TRP operating mode and beam mapping scheme; The mapping pattern includes at least one of periodic mapping, continuous mapping, half-mapped mapping, and bit mapping. The half-mapped mapping involves two beams corresponding to Transmission Configuration Indicators (TCIs) mapping to the first and second halves of multiple time units, respectively. The time unit is determined in one of the following ways: nominal transmission timing, actual transmission timing, or time slot-level mapping; The acquisition module is configured as follows: Receive the second group DCI transmitted by the base station on the PDCCH; wherein the second group DCI carries indication information of the beam mapping scheme; Based on the beam mapping scheme indication information carried by the second group of DCIs, the corresponding TRP operating mode is determined.

12. A data transmission device, characterized in that, Applied to a base station, the device includes: The transmitting module is configured to send control signaling to the user equipment (UE); wherein the control signaling carries indication information of the Transmission Access Point (TRP) operating mode and beam mapping scheme, wherein the TRP operating mode is based on single TRP transmission or based on multiple TRP transmission, and the beam mapping scheme is used to indicate the mapping pattern between multiple uplink cooperative transmission beams and time units corresponding to multiple TRPs. The receiving module is configured to receive data transmitted by the UE in the TRP operating mode and beam mapping scheme; The mapping pattern includes at least one of periodic mapping, continuous mapping, half-mapped mapping, and bit mapping. The half-mapped mapping involves two beams corresponding to Transmission Configuration Indicators (TCIs) mapping to the first and second halves of multiple time units, respectively. The time unit is determined in one of the following ways: nominal transmission timing, actual transmission timing, or time slot-level mapping; The sending module is configured as follows: The second group DCI is sent to the UE on the PDCCH; wherein the second group DCI carries the indication information of the beam mapping scheme, and the indication information of the beam mapping scheme corresponds to the TRP working mode.

13. A communication device, characterized in that, The device includes a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor executes the computer program to implement the data transmission method as described in any one of claims 1-5.

14. A communication device, characterized in that, It includes a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor executes the computer program to implement the data transmission method as described in any one of claims 6-10.

15. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program that causes the processor to perform the data transmission method according to any one of claims 1-5, or the data transmission method according to any one of claims 6-10.

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