Data transmission method, device, communication equipment and storage medium

Abstract

The present disclosure is a divisional application of 202080000577.6. The present disclosure discloses a data transmission method, apparatus, communication equipment and storage medium, relating to the field of communication technology. The method is applied to a terminal device, comprising: receiving at least two PDCCHs and transmitting at least two data channels, the at least two data channels being scheduled for transmission by the at least two PDCCHs; wherein the at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content. The present disclosure realizes the joint repeated transmission of control channels and data channels, thereby improving the robustness of communication.

Description

[0001] The present disclosure is a divisional application of the Chinese patent application with application number 202080000577.6 filed on March 16, 2020, and invention name “Data Transmission Method, Device, Communication Equipment and Storage Medium”. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a data transmission method, apparatus, communication equipment, and storage medium. Background Art

[0003] In the New Radio (NR), terminal devices can improve communication robustness by receiving data on a certain channel repeatedly sent by network devices.

[0004] In the related art, a multi-transmission reception point / antenna panel (multi-TRP / panel) between cells has been proposed, so that the terminal device can receive the Physical Downlink Shared CHannel (PDSCH) repeatedly sent by the network device.

[0005] Data on data channels such as PDSCH is scheduled for transmission by the Physical Downlink Control Channel (PDCCH). In the case of repeated data transmission, the relevant technology does not provide a good solution for how to combine the control channel and the data channel for transmission. Summary of the Invention

[0006] The embodiments of the present disclosure provide a data transmission method, apparatus, communication device, and storage medium, which improve the robustness of communication by combining repeated transmission of control channels and data channels. The technical solution is as follows:

[0007] According to one aspect of the present disclosure, a data transmission method is provided, which is applied to a terminal device, and the method includes:

[0008] receiving at least two PDCCHs and transmitting at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0009] The at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content.

[0010] According to one aspect of the present disclosure, a data transmission method is provided, which is applied to a network device. The method includes:

[0011] Sending at least two PDCCHs and transmitting at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0012] The at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content.

[0013] According to one aspect of the present disclosure, there is provided a data transmission device, the device comprising: a transmission module;

[0014] The transmission module is configured to receive at least two PDCCHs and transmit at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0015] The at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content.

[0016] According to one aspect of the present disclosure, there is provided a data transmission device, the device comprising: a transmission module;

[0017] The transmission module is configured to send at least two PDCCHs and transmit at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0018] The at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content.

[0019] According to one aspect of the present disclosure, a terminal device is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the data transmission method as described in the above aspects.

[0020] According to one aspect of the present disclosure, a network device is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the data transmission method as described in the above aspects.

[0021] According to one aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the data transmission method as described in the above aspect.

[0022] The technical solutions provided by the embodiments of the present disclosure include at least the following beneficial effects:

[0023] At least two PDCCHs and at least two data channels can be transmitted between the terminal device and the network device. The same content can be transmitted through at least two PDCCHs, or at least two data channels can transmit the same content, or at least two PDCCHs can transmit the same content and at least two data channels can transmit the same content, so as to realize joint repeated transmission of control channels and data channels, thereby improving the robustness of communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 is a block diagram of a communication system provided by an exemplary embodiment of the present disclosure;

[0026] Figure 2 is a schematic diagram of data transmission based on multiple TRPs or multiple antenna panels (multi-TRP / panel) provided by an exemplary embodiment of the present disclosure;

[0027] Figure 3 is a flowchart of a data transmission method provided by an exemplary embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of a data transmission method provided by an exemplary embodiment of the present disclosure;

[0029] Figure 5 is a schematic diagram of a data transmission method provided by an exemplary embodiment of the present disclosure;

[0030] Figure 6 is a block diagram of a data transmission device provided by an exemplary embodiment of the present disclosure;

[0031] Figure 7 is a block diagram of a data transmission device provided by an exemplary embodiment of the present disclosure;

[0032] Figure 8 is a block diagram of a communication device provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0034] Figure 1 A block diagram of a communication system provided by an exemplary embodiment of the present disclosure is shown. The communication system may include: an access network 12 and a terminal device 14.

[0035] The access network 12 includes several network devices 120. The network device 120 may be a base station, which is a device deployed in the access network to provide wireless communication functions for terminal devices. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in an LTE system, it is called eNodeB or eNB; in a 5G NR system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. To facilitate the description in the embodiments of the present disclosure, the above-mentioned devices that provide wireless communication functions for the terminal device 14 are collectively referred to as network devices.

[0036] The terminal device 14 may include various handheld devices with wireless communication capabilities, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (MS), terminals, and the like. For ease of description, the aforementioned devices are collectively referred to as terminal devices. The network device 120 and the terminal device 14 communicate with each other via some air interface technology, such as the Uu interface.

[0037] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Network (WLAN) system. Networks, WLAN), Wireless Fidelity (WiFi), next generation communication systems or other communication systems, etc.

[0038] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, and vehicle-to-everything (V2X) systems. The embodiments of the present application can also be applied to these communication systems.

[0039] In the 5G NR system, the network device 120 may include N transmission reception points (TRPs).

[0040] Figure 2 A schematic diagram of data transmission based on multiple transmission reception points or multiple antenna panels (multi-TRP / panel) provided by an exemplary embodiment of the present disclosure is shown.

[0041] The terminal device 210 is in a serving cell and also in a neighboring cell.

[0042] Each cell can be covered by more than one transmission reception point. Figure 2 As shown, the serving cell is jointly covered by transmission reception point 1 and transmission reception point 2, thereby increasing the coverage radius of the serving cell. The neighboring cell is covered by transmission reception point 3.

[0043] Each transmission and reception point can be equipped with one or more antenna panels. Different antenna panels can be oriented in different directions, allowing for the transmission and reception of beams in different transmission directions, thus achieving multiple spatial diversity. In this embodiment, transmission and reception points 1 and 2 each include one antenna panel: transmission and reception point 1 includes antenna panel 1, and transmission and reception point 2 includes antenna panel 2; transmission and reception point 3 includes two antenna panels: antenna panel 3 and antenna panel 4.

[0044] The network device can use multiple antenna panels (these multiple antenna panels can be from the same transmission and reception point or different transmission and reception points) to simultaneously send PDCCH to the terminal device 210. In this case, the transmission directions of different antenna panels are different, so the terminal device 210 also needs to use different antenna panels to receive PDCCH. In this case, the network device needs to indicate different Transmission Configuration Indication (TCI) states to the terminal device. Each TCI state corresponds to a receive beam direction on each antenna panel of the terminal device. Through the above beam-based transmission and reception method, coverage can be guaranteed.

[0045] Specifically, the network device can indicate the type D TCI state through signaling, thereby informing the terminal device 210 of the receive beam to be used during reception. Each TCI state corresponds to a reference signal (RS) identifier, and the RS can be a non-zero power channel state information reference signal (CSI-RS), a synchronization signal block (SSB), or a sounding reference signal (SRS).

[0046] When the signaling provides TCI status information of type D and instructs the terminal device 210 to receive the PDCCH, the terminal device 210 uses the Rx beam used when the reception power is the highest when receiving the RS corresponding to the RS identifier included in the TCI status information, to receive the PDCCH, as shown in Table 1.

[0047] Table 1

[0048] TCI status information RS index TCI#0 SSB index#1 TCI#1 SSB index#2 TCI#2 CSI-RS index#5 TCI#3 CSI-RS index#6 …… ……

[0049] For example, if the network device tells the terminal device 210 to use TCI#0, it tells the terminal device 210 to use the Rx beam with the maximum receiving power when receiving SSB index#1 to receive the PDCCH.

[0050] The network device may also indicate beam information by indicating spatial relation information. Each piece of spatial relation information corresponds to an RS identifier, and the RS may be a non-zero power CSI-RS, an SSB, or an SRS.

[0051] Figure 3 A schematic diagram showing a data transmission method provided by an exemplary embodiment of the present application is shown, which can be applied to Figure 1 In the terminal device and network device shown. The method includes:

[0052] Step 310: The network device sends at least two PDCCHs to the terminal device.

[0053] Accordingly, the terminal device receives at least two PDCCHs.

[0054] The PDCCH is a downlink control channel sent by network equipment to terminal equipment. The PDCCH carries scheduling and other control information, including at least one of transmission format, resource allocation, uplink scheduling permission, power control, and retransmission information.

[0055] Step 320: Transmit at least two data channels between the terminal device and the network device.

[0056] The at least two data channels are scheduled for transmission by at least two PDCCHs. The at least two PDCCHs and the at least two data channels are jointly repetitively transmitted, that is, the at least two PDCCHs transmit the same content, or the at least two data channels transmit the same content, or the at least two PDCCHs transmit the same content and the at least two data channels transmit the same content.

[0057] One PDCCH can schedule one data channel. One data channel can be a unique data channel or a collection of the same data channel that is repeatedly transmitted using mini-slots or slots.

[0058] Optionally, at least two PDCCHs transmitting the same content refer to at least two PDCCHs carrying the same downlink control information (DCI) signaling. Through the DCI signaling, data transmission between the terminal device and one or more antenna panels can be scheduled, and the multiple antenna panels can belong to the same transmission reception point or different transmission reception points or different cells.

[0059] The data channel can be a downlink data channel sent from a network device to a terminal device, or an uplink data channel sent from a terminal device to a network device, and this disclosure does not limit this. If the at least two data channels are downlink data channels sent from a network device to a terminal device, the network device sends the at least two data channels, and the terminal device receives the at least two data channels; if the at least two data channels are sent from a terminal device to a network device, the terminal device sends the at least two data channels, and the network device receives the at least two data channels.

[0060] Optionally, at least two data channels transmitting the same content means that each data channel transmits the same data. If the at least two data channels are uplink data channels, the at least two data channels transmit the same uplink data; if the at least two data channels are downlink data channels, the at least two data channels transmit the same downlink data.

[0061] It should be noted that the present disclosure does not limit the order in which steps 310 and 320 are performed. Step 310 may be performed before step 320, and some steps in step 310 may be performed after some steps in step 320. For example, after completing the "sending at least two PDCCHs" in step 310, the "transmitting at least two data channels" in step 320 may be performed. Alternatively, after completing the transmission of a PDDCH in step 310, the corresponding data channel in step 320 may be transmitted first, and then step 310 may be continued to transmit the PDCCH.

[0062] To sum up, the method provided in this embodiment can transmit at least two PDCCHs and at least two data channels between a terminal device and a network device, and transmit the same content through at least two PDCCHs, or transmit the same content through at least two data channels, or transmit the same content through at least two PDCCHs and at least two data channels, so as to realize joint repeated transmission of control channels and data channels, thereby improving the robustness of communication.

[0063] Based on Figure 3 In an optional embodiment, the network device and the terminal device can perform joint repeated transmission of the control channel and the data channel through multiple beams based on multiple transmission receiving points or multiple antenna panels (multi-TRP / panel).

[0064] The following explains the transmission of at least two PDCCHs through multiple beams based on multi-TRP / panel.

[0065] In an optional embodiment, the network device uses different transmit beams to transmit at least two PDCCHs, and correspondingly, the terminal device uses different receive beams to receive at least two PDCCHs.

[0066] In one possible design, the at least two PDCCHs come from different cells. In another possible design, the at least two PDCCHs come from different transmission reception points in the same cell. In another possible design, the at least two PDCCHs come from different antenna panels at the same transmission reception point.

[0067] For a network device, in one possible design, the network device sends at least two PDCCHs via different cells. In another possible design, the network device sends at least two PDCCHs via different transmission reception points in the same cell. In another possible design, the network device sends at least two PDCCHs via different antenna panels at the same transmission reception point.

[0068] At least two PDCCHs are transmitted by the network device through different antenna panels. These different antenna panels can belong to different cells, different transmission and reception points in the same cell, or different antenna panels within the same transmission and reception point. Because different antenna panels transmit in different directions, the terminal device also needs to use different antenna panels (corresponding to different receive beams) to receive at least two PDCCHs.

[0069] Exemplarily, the at least two PDCCHs include: a first PDCCH and a second PDCCH. The first PDCCH originates from a serving cell, and the second PDCCH originates from a neighboring cell. The network device uses transmit beams a and b to transmit the two PDCCHs, respectively, and the terminal device uses corresponding receive beams c and d to receive the two PDCCHs, respectively.

[0070] Optionally, the terminal device can determine the receiving beam through TCI status information or spatial relation information. The process of a terminal device determining a receiving beam through TCI status information (or spatial relationship information) may include: the network device notifies the terminal device of at least one TCI status information (or spatial relationship information) through radio resource control (RRC) signaling, including the identifier of the TCI status information (or spatial relationship information) and its corresponding RS type and RS identifier; if the RRC signaling notifies multiple TCI status information (or spatial relationship information), the network device then uses medium access control (MAC) signaling to activate one TCI status information (or spatial relationship information) among the above multiple TCI status information (or spatial relationship information). The activated TCI status information (or spatial relationship information) is the transmission status configuration (or spatial relationship information) of the PDCCH given by the network device to the terminal device, that is, it informs the terminal device that the receiving beam used when receiving the PDCCH should be the same as the receiving beam used when the receiving power is the strongest when receiving the RS corresponding to the TCI status information, or the same as the receiving beam corresponding to the transmitting beam used to send the RS corresponding to the spatial relationship information. Afterwards, the terminal can use the multiple different receiving beams determined above to receive at least two PDCCHs.

[0071] In an optional embodiment, at least two PDCCHs transmit different contents.

[0072] In this case, in order to achieve joint repeated transmission of the control channel and the data channel, at least two data channels transmit different contents.

[0073] Optionally, at least two PDCCHs transmit different contents, which may include any one of the following situations:

[0074] Case 1: At least two PDCCHs come from different cells, and the at least two PDCCHs respectively schedule data transmission between the terminal device and the cells corresponding to the at least two PDCCHs;

[0075] Case 2: At least two PDCCHs come from different transmission reception points in the same cell, and the at least two PDCCHs respectively schedule data transmission between the terminal device and the transmission reception points corresponding to the at least two PDCCHs;

[0076] Case 3: At least two PDCCHs come from different antenna panels at the same transmission and reception point, and the at least two PDCCHs respectively schedule data transmission between the terminal device and the antenna panels corresponding to the at least two PDCCHs.

[0077] The following explains how to transmit at least two data channels through multiple beams based on multi-TRP / panel.

[0078] The data channel may be a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH).

[0079] 1. The data channel is PDSCH.

[0080] PDSCH is the primary physical channel for unicast data transmission and is also used to transmit paging messages, random access response messages, and some system information.

[0081] In an optional embodiment, the network device sends at least two PDSCHs; wherein, the at least two PDCCHs carry reception beam information indicating that the terminal device receives at least two PDSCHs.

[0082] Correspondingly, the terminal device receives at least two PDSCHs according to the receiving beam information indicated by at least two PDCCHs.

[0083] At least two PDSCHs are scheduled for transmission by at least two PDCCHs. Specifically, one PDCCH can schedule one PDSCH or a set of PDSCHs that are repeatedly transmitted using mini-slots or slots. Because at least two PDCCHs carry receive beam information, a terminal device can receive at least two PDSCHs based on the receive beam information indicated by the at least two received PDCCHs.

[0084] In one possible design, at least two PDSCHs come from different cells. In another possible design, at least two PDSCHs come from different transmission reception points in the same cell. In another possible design, at least two PDSCHs come from different antenna panels at the same transmission reception point.

[0085] For a network device, in one possible design, the network device sends at least two PDSCHs through different cells. In another possible design, the network device sends at least two PDSCHs through different transmission reception points in the same cell. In another possible design, the network device sends at least two PDSCHs through different antenna panels at the same transmission reception point.

[0086] At least two PDSCHs are transmitted by network equipment using different antenna panels. These different antenna panels can belong to different cells, different transmission and reception points within the same cell, or different antenna panels within the same transmission and reception point. Because different antenna panels transmit in different directions, the terminal device also needs to use different antenna panels (corresponding to different receive beams) to receive at least two PDSCHs.

[0087] Exemplarily, the at least two PDSCHs include: a first PDSCH and a second PDSCH. The first PDSCH originates from a serving cell, and the second PDSCH originates from a neighboring cell. The network device uses transmit beams a and b to transmit the two PDSCHs, respectively, and the terminal device uses corresponding receive beams c and d to receive the two PDSCHs, respectively.

[0088] Optionally, the network device uses different transmit beams to transmit at least two PDSCHs. Correspondingly, the terminal device determines different receive beams based on receive beam information indicated by at least two PDCCHs, and uses the different receive beams to receive at least two PDSCHs.

[0089] The receiving beam information may be TCI state information (or spatial relationship information). The process by which the terminal device determines the receiving beam through TCI state information (or spatial relationship information) may include: the network device notifies the terminal device of at least one TCI state information (or spatial relationship information) through RRC signaling, including the identifier of the TCI state information (or spatial relationship information) and its corresponding RS type and RS identifier; if the RRC signaling notifies multiple TCI state information (or spatial relationship information), the network device then uses MAC signaling to activate M TCI state information (or spatial relationship information) among the above multiple TCI state information (or spatial relationship information), and then uses DCI signaling to indicate one TCI state information (or spatial relationship information) among the M. The indicated TCI state information (or spatial relationship information) is the transmission state configuration (or spatial relationship information) of the PDSCH of the terminal device given by the network device, that is, notifying the terminal device that the receiving beam used when receiving the PDSCH should be the same as the receiving beam used by the RS corresponding to the TCI state information, or the same as the receiving beam corresponding to the transmitting beam used by the RS corresponding to the spatial relationship information. Afterwards, the terminal can use the multiple different receiving beams determined above to receive at least two PDSCHs.

[0090] 2. The data channel is PUSCH.

[0091] PUSCH is the uplink counterpart of PDSCH. Each terminal device has at most one PUSCH on its uplink component carrier.

[0092] In an optional embodiment, the terminal device sends at least two PUSCHs according to the transmission beam information indicated by at least two PDCCHs.

[0093] Accordingly, the network device receives at least two PUSCHs; wherein, the at least two PUSCHs are sent by the terminal device according to the transmission beam information indicated by at least two PDCCHs.

[0094] At least two PUSCHs are scheduled for transmission by at least two PDCCHs. Specifically, one PDCCH can schedule one PUSCH or a set of PUSCHs that are repeatedly transmitted using mini-slots or slots. Because at least two PDCCHs carry transmit beam information, the terminal device can transmit at least two PUSCHs based on the transmit beam information indicated by the at least two received PDCCHs.

[0095] In one possible design, at least two PUSCHs are sent to different cells. In another possible design, at least two PUSCHs are sent to different transmission reception points in the same cell. In another possible design, at least two PUSCHs are sent to different antenna panels at the same transmission reception point.

[0096] For a network device, in one possible design, the network device receives at least two PUSCHs via different cells. In another possible design, the network device receives at least two PUSCHs via different transmission reception points in the same cell. In another possible design, the network device receives at least two PUSCHs via different antenna panels at the same transmission reception point.

[0097] At least two PUSCHs are transmitted by the terminal device through different antenna panels based on the transmit beam information indicated by at least two PDCCHs. The network device receives the PUSCHs through different antenna panels. Different antenna panels can belong to different cells, different transmission and reception points in the same cell, or different antenna panels at the same transmission and reception point. Because different antenna panels of the terminal device transmit in different directions, the network device also needs to use different antenna panels (corresponding to different receive beams) to receive the at least two PUSCHs.

[0098] Exemplarily, the at least two PUSCHs include: a first PUSCH and a second PUSCH. The first PUSCH originates from antenna panel 1 of the terminal device, and the second PUSCH originates from antenna panel 2 of the terminal device. The terminal device uses transmit beams a and b, respectively, to transmit the two PUSCHs, and the network device uses corresponding receive beams c and d, respectively, to receive the two PUSCHs.

[0099] Optionally, the terminal device determines different transmit beams based on transmit beam information indicated by at least two PDCCHs, and transmits at least two PUSCHs using the different transmit beams. Correspondingly, the network device receives at least two PUSCHs using different receive beams.

[0100] The transmission beam information may be spatial relationship information (or TCI status information). The process by which the terminal device determines the transmission beam through spatial relationship information (or TCI status information) may include: the network device notifies the terminal device of at least one spatial relationship information (or TCI status information) through RRC signaling, including the identifier of the spatial relationship information (or TCI status information) and its corresponding RS type and RS identifier; if the RRC signaling notifies multiple spatial relationship information (or TCI status information), the network device then uses MAC signaling to activate M spatial relationship information (or TCI status information) among the above multiple spatial relationship information (or TCI status information), and then uses DCI signaling to indicate one of the M spatial relationship information (or TCI status information). The indicated spatial relationship information (or TCI status information) is the spatial relationship information (or TCI status information) of the PUSCH of the terminal device given by the network device, that is, it informs the terminal device that the transmission beam used when sending PUSCH should be the same as the transmission beam used by the RS corresponding to the spatial relationship information (or TCI status information) or the same as the transmission beam corresponding to the receiving beam when the terminal device receives the RS corresponding to the TCI state. Afterwards, the terminal can use the multiple different transmission beams determined above to send at least two PUSCHs.

[0101] The following explains the order of at least two PDCCHs and at least two data channels (PDSCH or PUSCH) in the time domain.

[0102] At least two PDCCHs are adjacent in time domain; or, the first PDCCH and the first data channel are adjacent in time domain; wherein, the first data channel is scheduled for transmission by the first PDCCH, and the first PDCCH is any one of the at least two PDCCHs.

[0103] Illustratively, the at least two PDCCHs include: PDCCH 1, PDCCH 2, and PDCCH 3. The at least two data channels include: PDSCH 1, PDSCH 2, and PDSCH 3. PDSCH 1 is scheduled for transmission by PDCCH 1; PDSCH 2 is scheduled for transmission by PDCCH 2; and PDSCH 3 is scheduled for transmission by PDCCH 3. Alternatively, two or three of PDCCHs 1, PDCCH 2, and PDCCH 3 transmit the same content, i.e., two or three of PDSCHs 1, PDSCH 2, and PDSCH 3 are scheduled simultaneously. For example, PDCCH 1 and PDCCH 2 transmit the same content, and PDSCH 1 and PDSCH 2 are scheduled simultaneously. The positions of the above six channels in the time domain can be: PDCCH 1, PDCCH 2, PDCCH 3, PDSCH 1, PDSCH 2, PDSCH 3, corresponding to at least two PDCCHs being adjacent in the time domain; or can be: PDCCH1, PDSCH 1, PDCCH 2, PDSCH 2, PDCCH 3, PDSCH 3, corresponding to the first PDCCH and the first data channel being adjacent in the time domain.

[0104] In an optional embodiment, the at least two PDCCHs include a second PDCCH and a third PDCCH, and the at least two data channels include a second data channel set and a third data channel set;

[0105] The order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set includes: second PDCCH, third PDCCH, second data channel set, third data channel set; or second PDCCH, second data channel set, third PDCCH, third data channel set; wherein the second data channel set is scheduled for transmission by the second PDCCH, and the third data channel set is scheduled for transmission by the third PDCCH. Alternatively, the second PDCCH and the third PDCCH transmit the same content, and the second data channel set and the third data channel set are scheduled simultaneously.

[0106] The second data channel set may include one second data channel or multiple second data channels that are repeatedly transmitted and scheduled by the second PDCCH (or the second PDCCH and the third PDCCH). Exemplarily, the second data channel set includes: the second data channel. Exemplarily, the second data channel set includes: the second data channel, the second data channel, and the second data channel. In this case, the second data channel set is a data channel that is called by the second PDCCH (or the second PDCCH and the third PDCCH) and transmitted in a mini-slot manner or a time slot manner. Exemplarily, the second data channel set includes: data on the second data channel. Exemplarily, the second data channel set includes: data on the second data channel, data on the second data channel, and data on the second data channel.

[0107] Similarly, the third data channel set may include one third data channel or multiple third data channels that are repeatedly transmitted and scheduled by the third PDCCH (or the second PDCCH and the third PDCCH). Exemplarily, the third data channel set includes: the third data channel. Exemplarily, the third data channel set includes: the third data channel, the third data channel, and the third data channel. In this case, the third data channel set is a data channel transmitted by the third PDCCH (or the second PDCCH and the third PDCCH) in a mini-slot manner or a time slot manner. Exemplarily, the third data channel set includes: data of the third data channel. Exemplarily, the third data channel set includes: data of the third data channel, data of the third data channel, and data of the third data channel.

[0108] Exemplary, with reference to Figure 4 , the second PDCCH is PDCCH#1, the third PDCCH is PDCCH#2, the second data channel set includes a second data channel data #1 scheduled for transmission by the second PDCCH (or the second PDCCH and the third PDCCH), and the third data channel set includes a third data channel data #2 scheduled for transmission by the third PDCCH (or the second PDCCH and the third PDCCH).

[0109] like Figure 4 As shown in (a), the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set can be: PDCCH#1, PDCCH#2, data#1, data#2, corresponding to the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set.

[0110] like Figure 4As shown in (b), the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set can be: PDCCH#1, data#1, PDCCH#2, data#2, corresponding to the second PDCCH, the second data channel set, the third PDCCH, and the third data channel set.

[0111] Exemplary, with reference to Figure 5 , the second PDCCH is PDCCH#1, the third PDCCH is PDCCH#2, the second data channel set includes two repeated transmissions of the second data channel data #11 and data #12 scheduled by the second PDCCH (or the second PDCCH and the third PDCCH), and the third data channel set includes two repeated transmissions of the third data channel data #21 and data #22 scheduled by the third PDCCH (or the second PDCCH and the third PDCCH).

[0112] like Figure 5 As shown in (a), the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set can be: PDCCH#1, PDCCH#2, data#11, data#12, data#21, data#22, corresponding to the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set.

[0113] like Figure 5 As shown in (b), the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set can be: PDCCH#1, data#11, data#12, PDCCH#2, data#21, data#22, corresponding to the second PDCCH, the second data channel set, the third PDCCH, and the third data channel set.

[0114] Optionally, for at least two PDCCHs and at least two data channels, each channel may occupy one time slot, or each n channels may occupy one time slot, where n is a positive integer. A time slot is a basic unit of scheduling in the time domain, and the time lengths of different time slots correspond to different subcarrier spacings in the frequency domain. This disclosure does not impose any restrictions on the time length of the time slots used.

[0115] Exemplary, with reference to Figure 4 In (a), PDCCH#1, PDCCH#2, data#1, and data#2 can each occupy one time slot; or PDCCH#1 and PDCCH#2 can occupy one time slot, and data#1 and data#2 can occupy one time slot; or PDCCH#1, PDCCH#2, data#1, and data#2 can occupy one time slot.

[0116] Exemplary, with reference to Figure 4 In (b), PDCCH#1, data#1, PDCCH#2, and data#2 can each occupy one time slot; PDCCH#1 and data#1 can each occupy one time slot, and PDCCH#2 and data#2 can each occupy one time slot; or PDCCH#1, data#1, PDCCH#2, and data#2 can each occupy one time slot.

[0117] Exemplary, with reference to Figure 5 In (b), PDCCH#1, data #11, data #12, PDCCH#2, data #21, and data #22 can each occupy one time slot; or PDCCH#1 and data #11, data #12 can each occupy one time slot, and PDCCH#2 and data #21, data #22 can each occupy one time slot; or PDCCH#1, data #11, data #12, PDCCH#2, data #21, and data #22 can each occupy one time slot.

[0118] In an optional embodiment, the terminal device is set with a beam switching time, and the beam switching time is N symbols, where N is 0 or a positive integer.

[0119] During the beam switching time, the terminal device performs beam switching and cannot transmit PDCCH or data channels.

[0120] Exemplary, with reference to Figure 4 In (a), since different antenna panels are used, antenna panel switching is required between PDCCH#1 and PDCCH#2, between PDCCH#2 and data#1, and between data#1 and data#2. If the terminal does not require time to switch between antenna panels, the terminal does not need to free up symbols for beam switching; if the terminal requires time to switch between antenna panels, the terminal needs to free up symbols for beam switching.

[0121] Combined with reference Figure 4 In (b), antenna panel switching is required between Data #1 and PDCCH #2. If switching between terminal antenna panels does not require time, then the terminal does not need to reserve symbols for beam switching. If switching between terminal antenna panels requires time, then the terminal needs to reserve symbols for beam switching. However, since the same antenna panel and beam switching are used between PDCCH #1 and Data #1, and between PDCCH #2 and Data #2, no beam switching time is required. If different beams are used, L symbols are required for beam switching between PDCCH #1 and Data #1, and between PDCCH #2 and Data #2, where L is a natural number.

[0122] To sum up, the method provided in this embodiment can transmit at least two PDCCHs and at least two data channels between a terminal device and a network device, and transmit the same content through at least two PDCCHs, or transmit the same content through at least two data channels, or transmit the same content through at least two PDCCHs and at least two data channels, so as to realize joint repeated transmission of control channels and data channels, thereby improving the robustness of communication.

[0123] The method provided in this embodiment provides a detailed explanation of the joint repeated transmission of control channels and data channels between network devices and terminal devices through multiple beams. This data transmission method can support multi-TRP / panel-based data transmission, is suitable for future evolution, and further improves the robustness of communication.

[0124] Figure 6 A structural block diagram of a data transmission device provided by an exemplary embodiment of the present disclosure is shown. The device can be implemented as a terminal device, or implemented as a part of a terminal device. The device includes: a transmission module 601;

[0125] The transmission module 601 is configured to receive at least two PDCCHs and transmit at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0126] At least two PDCCHs transmit the same content, or at least two data channels transmit the same content, or at least two PDCCHs transmit the same content and at least two data channels transmit the same content.

[0127] In an optional embodiment, the transmission module 601 is configured to receive at least two PDCCHs using different receiving beams.

[0128] In an optional embodiment, at least two PDCCHs come from different cells; or at least two PDCCHs come from different transmission reception points in the same cell; or at least two PDCCHs come from different antenna panels at the same transmission reception point.

[0129] In an optional embodiment, at least two PDCCHs transmit different content; at least two PDCCHs come from different cells, and at least two PDCCHs respectively schedule data transmission between the terminal device and the cells corresponding to the at least two PDCCHs; at least two PDCCHs come from different transmission receiving points, and at least two PDCCHs respectively schedule data transmission between the terminal device and the transmission receiving points corresponding to the at least two PDCCHs; at least two PDCCHs come from different antenna panels, and at least two PDCCHs respectively schedule data transmission between the terminal device and the antenna panels corresponding to the at least two PDCCHs.

[0130] In an optional embodiment, the data channel is a PDSCH; the transmission module 601 is configured to receive at least two PDSCHs according to the reception beam information indicated by at least two PDCCHs.

[0131] In an optional embodiment, the device also includes a determination module 602; the determination module 602 is configured to determine different receiving beams based on the receiving beam information indicated by at least two PDCCHs; the transmission module 601 is configured to use different receiving beams to receive at least two PDSCHs.

[0132] In an optional embodiment, at least two PDSCHs come from different cells; or, at least two PDSCHs come from different transmission reception points in the same cell; or, at least two PDSCHs come from different antenna panels in the same transmission reception point.

[0133] In an optional embodiment, the data channel is a PUSCH; the transmission module 601 is configured to transmit at least two PUSCHs according to the transmission beam information indicated by at least two PDCCHs.

[0134] In an optional embodiment, the device also includes a determination module 602; the determination module 602 is configured to determine different transmission beams based on the transmission beam information indicated by at least two PDCCHs; the transmission module 601 is configured to use different transmission beams to send at least two PUSCHs.

[0135] In an optional embodiment, the transmission module 601 is configured to send at least two PUSCHs to different cells; or, the transmission module 601 is configured to send at least two PUSCHs to different transmission receiving points of the same cell; or, the transmission module 601 is configured to send at least two PUSCHs to different antenna panels of the same transmission receiving point.

[0136] In an optional embodiment, at least two PDCCHs are adjacent in time domain position; or, the first PDCCH and the first data channel are adjacent in time domain position; wherein, the first data channel is scheduled for transmission by the first PDCCH, and the first PDCCH is any one of the at least two PDCCHs.

[0137] In an optional embodiment, at least two PDCCHs include a second PDCCH and a third PDCCH, and at least two data channels include a second data channel set and a third data channel set; the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set includes: the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; or, the second PDCCH, the second data channel, the third PDCCH, and the third data channel; wherein the second data channel set is scheduled for transmission by the second PDCCH, and the third data channel set is scheduled for transmission by the third PDCCH.

[0138] In an optional embodiment, the terminal device is set with a beam switching time, and the beam switching time is N symbols, where N is 0 or a positive integer.

[0139] Figure 7 A structural block diagram of a data transmission device provided by an exemplary embodiment of the present disclosure is shown. The device can be implemented as a network device, or implemented as a part of a network device. The device includes: a transmission module 701;

[0140] The transmission module 701 is configured to send at least two PDCCHs and transmit at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs;

[0141] At least two PDCCHs transmit the same content, or at least two data channels transmit the same content, or at least two PDCCHs transmit the same content and at least two data channels transmit the same content.

[0142] In an optional embodiment, the transmission module 701 is configured to transmit at least two PDCCHs using different transmission beams.

[0143] In an optional embodiment, the transmission module 701 is configured to send at least two PDCCHs through different cells; or, the transmission module 701 is configured to send at least two PDCCHs through different transmission receiving points of the same cell; or, the transmission module 701 is configured to send at least two PDCCHs through different antenna panels of the same transmission receiving point.

[0144] In an optional embodiment, at least two PDCCHs transmit different content; when at least two PDCCHs are sent through different cells, at least two PDCCHs respectively schedule data transmission between the terminal device and the cells corresponding to the at least two PDCCHs; when at least two PDCCHs are sent through different transmission receiving points, at least two PDCCHs respectively schedule data transmission between the terminal device and the transmission receiving points corresponding to the at least two PDCCHs; when at least two PDCCHs are sent through different antenna panels, at least two PDCCHs respectively schedule data transmission between the terminal device and the antenna panels corresponding to the at least two PDCCHs.

[0145] In an optional embodiment, the data channel is a PDSCH; the transmission module 701 is configured to send at least two PDSCHs; wherein the at least two PDCCHs carry reception beam information indicating that the terminal device receives at least two PDSCHs.

[0146] In an optional embodiment, the transmission module 701 is configured to transmit at least two PDSCHs using different transmission beams.

[0147] In an optional embodiment, the transmission module 701 is configured to send at least two PDSCHs through different cells; or, the transmission module 701 is configured to send at least two PDSCHs through different transmission receiving points in the same cell; or, the transmission module 701 is configured to send at least two PDSCHs through different antenna panels of the same transmission receiving point.

[0148] In an optional embodiment, the data channel is PUSCH; the transmission module 701 is configured to receive at least two PUSCHs; wherein the at least two PUSCHs are sent by the terminal device according to the transmission beam information indicated by at least two PDCCHs.

[0149] In an optional embodiment, the transmission module 701 is configured to receive at least two PUSCHs using different receiving beams.

[0150] In an optional embodiment, the transmission module 701 is configured to receive at least two PUSCHs through different cells; or, the transmission module 701 is configured to receive at least two PUSCHs through different transmission reception points of the same cell; or, the transmission module 701 is configured to receive at least two PUSCHs through different antenna panels of the same transmission reception point.

[0151] In an optional embodiment, at least two PDCCHs are adjacent in time domain position; or, the first PDCCH and the first data channel are adjacent in time domain position; wherein, the first data channel is scheduled for transmission by the first PDCCH, and the first PDCCH is any one of the at least two PDCCHs.

[0152] In an optional embodiment, at least two PDCCHs include a second PDCCH and a third PDCCH, and at least two data channels include a second data channel set and a third data channel set; the order of the time domain positions of the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set includes: the second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; or, the second PDCCH, the second data channel set, the third PDCCH, and the third data channel set; wherein the second data channel set is scheduled for transmission by the second PDCCH, and the third data channel set is scheduled for transmission by the third PDCCH.

[0153] Figure 8 A schematic structural diagram of a communication device (terminal device or network device) provided by an exemplary embodiment of the present application is shown. The communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104 and a bus 105.

[0154] The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

[0155] The receiver 102 and the transmitter 103 may be implemented as a communication component, which may be a communication chip.

[0156] The memory 104 is connected to the processor 101 via a bus 105 .

[0157] The memory 104 may be used to store at least one instruction, and the processor 101 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0158] In addition, the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM).

[0159] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, code set or instruction set is stored. The at least one instruction, the at least one program, the code set or instruction set is loaded and executed by the processor to implement the data transmission method performed by the communication device provided in the above-mentioned various method embodiments.

[0160] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0161] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A data transmission method, characterized in that: Applied to a terminal device, the method includes: receiving at least two physical downlink control channels (PDCCHs) using different receiving beams; Transmitting at least two data channels according to the beam information indicated by the at least two PDCCHs, wherein the at least two data channels are scheduled for transmission by the at least two PDCCHs; wherein, different receiving beams are determined according to the receiving beam information indicated by the at least two PDCCHs; and at least two physical downlink shared channels PDSCHs are received using the different receiving beams; The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

2. The method according to claim 1, characterized in that The data channel includes a physical uplink shared channel PUSCH; The transmitting at least two data channels comprises: At least two PUSCHs are sent according to the transmission beam information indicated by the at least two PDCCHs.

3. The method according to claim 2, characterized in that The sending of at least two PUSCHs according to the transmit beam information indicated by the at least two PDCCHs includes: Determining different transmit beams according to the transmit beam information indicated by the at least two PDCCHs; The at least two PUSCHs are transmitted using the different transmit beams.

4. A data transmission method, characterized in that: Applied to a network device, the method includes: Send at least two physical downlink control channels (PDCCHs) using different transmit beams; Transmitting at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs; At least two physical downlink shared channels (PDSCHs) are sent using different transmit beams, and the at least two PDCCHs carry receive beam information indicating that the terminal device receives the at least two PDSCHs. The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

5. The method according to claim 4, characterized in that The data channel includes a physical uplink shared channel PUSCH; The transmitting at least two data channels comprises: Receive at least two PUSCHs; The at least two PUSCHs are sent by the terminal device according to the transmission beam information indicated by the at least two PDCCHs.

6. The method according to claim 5, characterized in that The receiving at least two PUSCHs includes: The at least two PUSCHs are received using different receive beams.

7. A data transmission device, characterized in that: Applied in a terminal device, the apparatus comprises: a transmission module; The transmission module is configured to receive at least two physical downlink control channels (PDCCHs) using different receive beams; transmit at least two data channels according to beam information indicated by the at least two PDCCHs, wherein the at least two data channels are scheduled for transmission by the at least two PDCCHs; wherein, different receiving beams are determined according to the receiving beam information indicated by the at least two PDCCHs; and at least two physical downlink shared channels PDSCHs are received using the different receiving beams; The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

8. A data transmission device, characterized in that: Applied in a network device, the device comprises: a transmission module; The transmission module is configured to transmit at least two physical downlink control channels (PDCCHs) using different transmission beams; and transmit at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs. At least two physical downlink shared channels (PDSCHs) are sent using different transmit beams, and the at least two PDCCHs carry receive beam information indicating that the terminal device receives the at least two PDSCHs. The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

9. A terminal device, characterized in that: The terminal device includes: processor; a transceiver connected to the processor; a memory for storing executable instructions for the processor; The processor is configured to load and execute the executable instructions to implement: receiving at least two physical downlink control channels (PDCCHs) using different receiving beams; Transmitting at least two data channels according to the beam information indicated by the at least two PDCCHs, wherein the at least two data channels are scheduled for transmission by the at least two PDCCHs; wherein, different receiving beams are determined according to the receiving beam information indicated by the at least two PDCCHs; and at least two physical downlink shared channels PDSCHs are received using the different receiving beams; The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

10. A network device, characterized in that: The network equipment includes: processor; a transceiver connected to the processor; a memory for storing executable instructions for the processor; The processor is configured to load and execute the executable instructions to implement: Send at least two physical downlink control channels (PDCCHs) using different transmit beams; Transmitting at least two data channels, where the at least two data channels are scheduled for transmission by the at least two PDCCHs; At least two physical downlink shared channels (PDSCHs) are sent using different transmit beams, and the at least two PDCCHs carry receive beam information indicating that the terminal device receives the at least two PDSCHs. The at least two PDCCHs include a second PDCCH and a third PDCCH, the at least two data channels include a second data channel set and a third data channel set, and the order of their time domain positions includes: The second PDCCH, the third PDCCH, the second data channel set, and the third data channel set; The second PDCCH and the third PDCCH send the same content and schedule the second data channel set and the third data channel set at the same time.

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