HARQ feedback method, apparatus, device, and storage medium

Abstract

The application discloses a HARQ feedback method, device, equipment and storage medium, and relates to the field of mobile communication. The method comprises the following steps: a terminal receives beam indication signaling sent by a first access network device, the beam indication signaling indicates a target beam to be used by the terminal, and in the case that the access network device to which the target beam belongs is a second access network device, the terminal performs hybrid automatic repeat request (HARQ) feedback of downlink data with the second access network device through the target beam. The terminal can determine whether the access network device of the target beam to be used is the second access network device according to the beam indication signaling sent by the access network device, and performs the HARQ feedback of the downlink data when the terminal determines that the access network device is the second access network device. The application provides a new HARQ feedback mode, and the reliability of the HARQ feedback is ensured.

Description

Technical Field

[0001] This application relates to the field of mobile communications, and in particular to a HARQ (Hybrid Automatic Repeat Request) feedback method, apparatus, device, and storage medium. Background Technology

[0002] In mobile communication technology, terminals and access network equipment communicate via beams. The access network equipment can also configure beams for neighboring cells for the terminal, allowing the terminal to communicate with the access network equipment through these neighboring cell beams. However, if the terminal receives downlink data through the serving cell's beam, but needs to send HARQ information for downlink data, the terminal switches to using the neighboring cell's beam and cannot return the HARQ information. Summary of the Invention

[0003] This application provides a HARQ feedback method, apparatus, device, and storage medium. It offers a novel HARQ feedback approach that ensures the reliability of HARQ feedback. The technical solution is as follows:

[0004] According to one aspect of this application, a HARQ feedback method is provided, the method being executed by a terminal, the method comprising:

[0005] The terminal receives a beam indication signaling sent by a first access network device, wherein the beam indication signaling indicates the target beam to be used by the terminal.

[0006] When the access network device to which the target beam belongs is the second access network device, the hybrid automatic repeat request (HARQ) feedback for downlink data is performed through the target beam and the second access network device.

[0007] According to one aspect of this application, a HARQ feedback method is provided, the method being performed by a first access network device, the method comprising:

[0008] Send a beam indication signal to the terminal, the beam indication signal indicating the target beam to be used by the terminal;

[0009] If the access network device to which the target beam belongs is a second access network device, the second access network device is instructed to perform a Hybrid Automatic Repeat Request (HARQ) feedback for downlink data with the terminal through the target beam.

[0010] According to one aspect of this application, a HARQ feedback method is provided, the method being performed by a second access network device, the method comprising:

[0011] When the access network device to which the target beam belongs is a second access network device, HARQ feedback is provided through the downlink data sent by the target beam receiving terminal;

[0012] The target beam is indicated to the terminal by the first access network device via beam indication signaling.

[0013] According to one aspect of this application, a HARQ feedback device is provided, the device comprising:

[0014] The receiving module is used to receive beam indication signaling sent by the first access network device, wherein the beam indication signaling indicates the target beam to be used by the terminal;

[0015] The processing module is configured to, when the access network device to which the target beam belongs is a second access network device, perform Hybrid Automatic Repeat Request (HARQ) feedback for downlink data through the target beam and the second access network device.

[0016] According to one aspect of this application, a HARQ feedback device is provided, the device comprising:

[0017] The transmitting module is used to send beam indication signaling to the terminal, wherein the beam indication signaling indicates the target beam to be used by the terminal;

[0018] The processing module is configured to, when the access network device to which the target beam belongs is a second access network device, instruct the second access network device to perform a Hybrid Automatic Repeat Request (HARQ) feedback for downlink data with the terminal through the target beam.

[0019] According to one aspect of this application, a HARQ feedback device is provided, the device comprising:

[0020] The processing module is used to perform HARQ feedback on downlink data sent by the target beam receiving terminal when the access network device to which the target beam belongs is a second access network device.

[0021] The target beam is indicated to the terminal by the first access network device via beam indication signaling.

[0022] According to one aspect of this application, a terminal is provided, the terminal 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 HARQ feedback method as described above.

[0023] According to one aspect of this application, an access network device is provided, the access network device 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 HARQ feedback method as described above.

[0024] According to one aspect of this application, a computer-readable storage medium is provided, wherein executable program code is stored therein, the executable program code being loaded and executed by a processor to implement the HARQ feedback method as described above.

[0025] According to one aspect of this application, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is running on a terminal or access network device, are used to implement the HARQ feedback method as described above.

[0026] According to one aspect of this application, an embodiment of this application provides a computer program product that, when executed by a processor of a terminal or access network device, is used to implement the HARQ feedback method described above.

[0027] The technical solutions provided in this application have at least the following beneficial effects:

[0028] The methods, apparatus, devices, and storage media provided in this application allow a terminal to determine whether the access network device to which the target beam to be used belongs is a second access network device based on the beam indication signaling sent by the access network device. When the terminal determines that it is a second access network device, it performs HARQ feedback for downlink data. This application provides a new HARQ feedback method that ensures the reliability of HARQ feedback. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A block diagram of a communication system provided in an exemplary embodiment of this application is shown;

[0031] Figure 2 A block diagram of a communication system provided in an exemplary embodiment of this application is shown;

[0032] Figure 3 A flowchart of a HARQ feedback method provided in an exemplary embodiment of this application is shown;

[0033] Figure 4 A schematic diagram of HARQ feedback provided in an exemplary embodiment of this application is shown;

[0034] Figure 5 A flowchart of a HARQ feedback method provided in an exemplary embodiment of this application is shown;

[0035] Figure 6 A flowchart of a HARQ feedback method provided in an exemplary embodiment of this application is shown;

[0036] Figure 7 A flowchart of a HARQ feedback method provided in an exemplary embodiment of this application is shown;

[0037] Figure 8 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown;

[0038] Figure 9 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown;

[0039] Figure 10 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown;

[0040] Figure 11 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown;

[0041] Figure 12 A schematic diagram of the structure of a communication device provided in an exemplary embodiment of this application is shown. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. Unless otherwise indicated, the same numerals in different drawings denote the same or similar elements in the following description relating to the drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0045] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, for example, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0046] The application scenarios of this application will be described below:

[0047] Figure 1 A block diagram of a communication system provided in an exemplary embodiment of this application is shown. The communication system may include: a terminal 10 and an access network device 20.

[0048] The number of terminals 10 is typically multiple, and one or more terminals 10 can be distributed within the cell managed by each access network device 20. For ease of description, in the embodiments of this application, the devices mentioned above are collectively referred to as terminals. Terminal 10 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication capabilities, as well as various forms of user equipment (UE), mobile station (MS), etc.

[0049] Access network device 20 is a device deployed in an access network to provide wireless communication functionality to terminal 10. For ease of description, in this embodiment, the aforementioned device providing wireless communication functionality to terminal 10 is collectively referred to as access network device. Access network device 20 and terminal 10 can establish a connection via an air interface, thereby communicating through this connection, including signaling and data exchange. There can be multiple access network devices 20, and two adjacent access network devices 20 can communicate via wired or wireless means. Terminal 10 can switch between different access network devices 20, that is, establish connections with different access network devices 20.

[0050] In some embodiments, the access network device is a TRP (Transmit Receive Point) device, or the access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems employing different radio access technologies, the name of the device with access network functionality may differ; for example, in a 5G NR system, it is called gNodeB or gNB. As communication technologies evolve, the name "access network device" may change.

[0051] In some embodiments, the access network device 20 is a TRP device, and the access network device 20 can be controlled by a DU (Distributed Unit). One DU can control multiple access network devices 20, or it can control one access network device 20. Different DUs can belong to the same CU (Centralized Unit), or they can belong to different CUs. A CU can control at least one DU.

[0052] For example, taking access network device 20 as a TRP, see [link / reference]. Figure 2 The communication system described in this application is as follows. The communication system includes a CU, and the CU controls two DUs, namely DU1 and DU2. DU1 and DU2 respectively include an RLC (Radio Link Control) layer, a MAC layer, and a PHY (Port Physical Layer) layer. DU1 controls TRP1, and DU2 controls TRP2.

[0053] The "5G NR system" in this application embodiment can also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in this application embodiment can be applied to 5G NR systems, as well as subsequent evolution systems of 5G NR systems.

[0054] Figure 3 The flowchart illustrates a HARQ feedback method provided in an exemplary embodiment of this application, which can be applied, for example, to... Figure 1 In the terminal and access network equipment shown, the method includes at least some of the following:

[0055] Step 301: The first access network device sends a beam indication signaling message to the terminal, which indicates the target beam to be used by the terminal.

[0056] Step 302: The terminal receives the beam indication signaling sent by the first access network device.

[0057] In this embodiment of the application, the first access network device sends a beam indication signaling to the terminal. After receiving the beam indication signaling, the terminal determines which target beams to use for subsequent data transmission based on the beam indication signaling.

[0058] In some embodiments, the beam indication signaling is DCI (Downlink Control Information) signaling, or the beam indication signaling is MAC CE (MAC Control Element) signaling.

[0059] Step 303: When the access network device to which the target beam belongs is the second access network device, the terminal performs HARQ feedback of downlink data with the second access network device through the target beam.

[0060] In this embodiment, the terminal receives downlink data sent by the first access network device, and the terminal needs to perform HARQ feedback based on the downlink data. If the target beam indicated by the first access network device may not belong to the first access network device, the terminal determines how to perform HARQ feedback by judging whether the access network device to which the target beam belongs is the second access network device. If the access network device to which the target beam belongs is the second access network device, it means that if the terminal needs to perform HARQ feedback, it needs to perform downlink data HARQ feedback with the second access network device through the target beam. The second access network device is an access network device different from the first access network device.

[0061] It should be noted that the above embodiments are all illustrated using the example that the access network equipment to which the target beam belongs is different from the access network equipment to which the currently used beam belongs. In another embodiment, the decision to perform HARQ feedback is made based on whether the DU or CU to which the access network equipment to which the target beam belongs.

[0062] In some embodiments, the access network device to which the target beam belongs is a second access network device, including any of the following:

[0063] (1) The DU to which the second access network device belongs is different from the DU to which the first access network device belongs. The access network device to which the target beam belongs is the second access network device.

[0064] In some embodiments, the beam indication signaling includes a TCI state, and the TCI state includes DU identification information, which indicates the DU to which the target beam belongs.

[0065] For example, the DU identification information may be the ID of the DU, the name of the DU, or other information of the DU. This application embodiment does not limit the specific information.

[0066] If the identifier information of the DU to which the access network device to which the target beam belongs is different from the identifier information of the DU to which the access network device to which the currently used beam belongs, it means that the DU to which the access network device to which the target beam belongs is different from the DU to which the access network device to which the currently used beam belongs.

[0067] Optionally, the DU identification information is the gNB-DU ID (Identity Document). When the first access network device indicates the target beam, the terminal determines whether the access network device to which the gNB-DU ID belongs belongs to the second access network device. If the gNB-DU ID is different from the gNB-DU ID corresponding to the first access network device, it indicates that the access network device to which the target beam belongs is the second access network device.

[0068] Access network devices with different gNB-DU IDs belong to the same gNB. The gNB-DUID indicates different access network devices or the same access network devices belonging to the same gNB.

[0069] (2) The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

[0070] In some embodiments, the beam indication signaling includes a TCI state, and the TCI state includes CU identification information, which indicates the CU to which the target beam belongs.

[0071] For example, the CU identification information may be the CU's ID, the CU's name, or other information about the CU; this application embodiment does not limit this.

[0072] If the identification information of the CU to which the target beam belongs is different from the identification information of the CU to which the currently used beam belongs, it means that the CU to which the target beam belongs is different from the CU to which the currently used beam belongs.

[0073] Step 304: When the access network device to which the target beam belongs is the second access network device, the second access network device receives downlink data sent by the target beam receiving terminal via HARQ feedback.

[0074] In this embodiment of the application, if the access network device to which the target beam indicated by the first access network device belongs is different from the access network device to which the currently used beam belongs, then the terminal needs to perform HARQ feedback of downlink data with the second access network device, and the second access network device also needs to receive HARQ feedback of downlink data sent by the terminal through the target beam.

[0075] For example, such as Figure 4 As shown, the terminal receives beam indication signaling 1 from the first access network device at time t0 and sends downlink data after time t0. At time t1, it receives beam indication signaling from the first access network device again. When feeding back HARQ feedback information for downlink data, it needs to use the beam indicated by beam indication signaling 2 at time t1. Therefore, it needs to determine how to perform HARQ feedback based on the access network device to which the beam belongs.

[0076] It should be noted that, in the above embodiment, when the access network device to which the target beam belongs is the second access network device, the first access network device instructs the second access network device to perform Hybrid Automatic Repeat Request (HARQ) feedback for downlink data with the terminal through the target beam.

[0077] It should be noted that the steps performed by the terminal in the embodiments of this application can form a new embodiment on their own, the steps performed by the first access network device in the embodiments of this application can also form a new embodiment on their own, and the steps performed by the second access network device in the embodiments of this application can also form a new embodiment on their own.

[0078] In the method provided in this application embodiment, the terminal can determine whether the access network device to which the target beam belongs is the second access network device based on the beam indication signaling sent by the access network device. When the terminal determines that it is the second access network device, HARQ feedback of downlink data is performed. This application provides a new HARQ feedback method to ensure the reliability of data transmission.

[0079] Figure 3 Based on the illustrated embodiment, if the terminal does not send HRAQ feedback information for downlink data, then for the first access network device, there are two cases:

[0080] The first scenario: The communication protocol stipulates that the terminal has successfully received downlink data. See below for further details. Figure 5 The method includes:

[0081] Step 501: If the access network device to which the target beam belongs is the second access network device, the terminal does not send HARQ feedback information for downlink data.

[0082] In this embodiment of the application, if the terminal has determined that the access network device to which the target beam belongs is different from the access network device to which the currently used beam belongs, then the terminal does not need to return the HARQ feedback information of the downlink data after receiving the downlink data.

[0083] If the first access network device does not receive HARQ feedback information for the downlink data after sending downlink data to the terminal, it is determined that the terminal has indicated that it has successfully received the downlink data by not sending HARQ feedback information. After the first access network device sends downlink data to the terminal, it is assumed that the terminal has successfully received the downlink data and that the terminal will not return HARQ feedback information for the downlink data.

[0084] It should be noted that the HARQ feedback information for when the terminal does not send downlink data and the default success of the first access network device in sending downlink data are determined by the communication protocol.

[0085] The method provided in this application embodiment allows the terminal to notify the first access network device of successful downlink data reception by not sending HARQ feedback information when the access network device to which the target beam belongs is the second access network device.

[0086] The second possibility is that the terminal failed to correctly receive the downlink data as stipulated in the protocol. Please refer to the following section. Figure 6 The method includes:

[0087] Step 601: If the access network device to which the target beam belongs is the second access network device, the terminal does not send HARQ feedback information for downlink data.

[0088] In this embodiment of the application, if the terminal has determined that the access network device to which the target beam belongs is the second access network device, the terminal does not need to send back HARQ feedback information for the downlink data. The first access network device assumes that the terminal has not received the downlink data correctly, and the second access network device performs the retransmission of the downlink data.

[0089] Step 602: If the access network device to which the target beam belongs is the second access network device, and the first access network device has not received the HRAQ feedback information of the downlink data returned by the terminal, the first access network device sends the downlink data that needs to be retransmitted and the information required for retransmission to the second access network device.

[0090] Step 603: The second access network device receives downlink data and retransmission information sent by the first access network device.

[0091] It should be noted that the HARQ feedback information for when the terminal does not send downlink data and the retransmission of downlink data by the first access network device are determined by the communication protocol.

[0092] In this embodiment, if the access network device to which the target beam belongs is the second access network device, and after the first access network device sends downlink data to the terminal, the first access network device determines that the downlink data cannot return HARQ feedback information normally, the terminal will not return HARQ feedback information for the downlink data. Therefore, the first access network device assumes that the terminal has not received the sent downlink data. Since the terminal is communicating through the target beam at this time, and the target beam belongs to the second access network device, the first access network device sends the downlink data that needs to be retransmitted and the information required for retransmission to the second access network device. The second access network device receives the downlink data that needs to be retransmitted and the information required for retransmission sent by the first access network device.

[0093] Step 604: If the access network device to which the target beam belongs is the second access network device, and the first access network device has not received HARQ feedback information for downlink data, the second access network device retransmits downlink data to the terminal through the target beam based on the scheduled retransmission resources.

[0094] In this embodiment of the application, if the access network device to which the target beam belongs is the second access network device, and the first access network device has not received the HARQ feedback information of the downlink data, it means that the terminal has not received the downlink data sent by the first access network device. At this time, the downlink data needs to be retransmitted. Since the terminal transmits data through the target beam at this time, the second access network device retransmits the downlink data to the terminal through the target beam based on the scheduled retransmission resources.

[0095] Among them, the retransmission resources are scheduled by the second access network equipment and are used by the second access network equipment to retransmit downlink data.

[0096] Optionally, the second access network device sends a DCI call to the terminal to retransmit the PDSCH of the downlink data. The HARQ process identifier and target data corresponding to the retransmitted downlink data are both included in the DCI.

[0097] In some embodiments, the HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

[0098] For example, the target value is 1, or the target value is 0.

[0099] In this embodiment, since the second access network device performs downlink data retransmission when the terminal does not receive downlink data sent by the first access network device, the HARQ process identifier corresponding to the downlink data sent by the second access network device is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the target value indicates that the downlink data is retransmitted data rather than newly transmitted data.

[0100] Step 605: The terminal determines the retransmission resources scheduled by the second access network device.

[0101] Step 606: The terminal receives downlink data retransmitted by the second access network device through the target beam based on the retransmission resource.

[0102] In this embodiment, the second access network device schedules retransmission resources for the terminal through DCI. Once the terminal determines the retransmission resources scheduled by the second access network device, it can receive downlink data retransmitted by the second access network device through the target beam based on the retransmission resources.

[0103] The second access network device schedules PDSCH (Physical Downlink Shared Channel) resources and uses these PDSCH resources to send retransmissions of downlink data.

[0104] In some embodiments, the second access network device sends scheduling information to the terminal. After receiving the scheduling information sent by the second access network device, the terminal can determine the retransmission resources scheduled by the second access network device, and then receive the retransmission of downlink data based on the retransmission resources.

[0105] The method provided in this application embodiment, when the access network device to which the target beam belongs is a second access network device, allows the terminal to avoid sending HARQ feedback information and have the second access network device retransmit downlink data, thus ensuring the reliability of data transmission.

[0106] exist Figure 3 Based on the embodiment shown, the terminal can also feed back HARQ feedback information for downlink data through configured resources. The following explains how to feed back HARQ feedback information.

[0107] When the access network device to which the target beam belongs is the second access network device, the terminal sends HARQ feedback information of downlink data to the second access network device through the target beam based on the first resources scheduled by the first access network device. The first access network device then sends the scheduled first resources to the second access network device.

[0108] In this embodiment of the application, if the access network device to which the target beam belongs is different from the second access network device, and the first access network device has been configured with the first resource, the terminal can directly send HARQ feedback information of downlink data to the second access network device through the target beam based on the first resource scheduled by the first access network device.

[0109] The first access network device will send its scheduled first resources to the second access network device. Therefore, when the terminal sends HARQ feedback information through the first resources scheduled by the first access network device, the second access network device can receive the HARQ feedback information.

[0110] In some embodiments, the HARQ feedback information includes ACK (acknowledgment) and NACK (non-acknowledgment). ACK indicates that the terminal successfully received downlink data. NACK indicates that the terminal did not receive downlink data.

[0111] It should be noted that when the access network device to which the target beam belongs is the second access network device, the terminal will send HARQ feedback information to the second access network device through the first resource scheduled by the first access network device. For the second access network device, when the access network device to which the target beam belongs is the second access network device, it will receive the HARQ feedback information of the downlink data sent by the terminal through the target beam based on the first resource scheduled by the first access network device.

[0112] It should be noted that the above embodiments illustrate how the terminal provides HARQ feedback information. In another embodiment, if the HARQ feedback information provided by the terminal is NACK, the terminal needs to determine the retransmission resources scheduled by the second access network device and receive the retransmission of downlink data sent by the second access network device based on the resources.

[0113] In this embodiment of the application, the second access network device schedules retransmission resources and sends retransmissions of downlink data to the terminal based on the scheduled retransmission resources, and then receives the retransmissions sent by the second access network device based on the determined retransmission resources.

[0114] In some embodiments, the HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

[0115] For example, the target value is 1, or the target value is 0.

[0116] Optionally, the second access network device sends a DCI call to the terminal to retransmit the PDSCH of the downlink data. The HARQ process identifier and target data corresponding to the retransmitted downlink data are both included in the DCI.

[0117] In this embodiment, since the second access network device performs downlink data retransmission when the terminal does not receive downlink data sent by the first access network device, the HARQ process identifier corresponding to the downlink data sent by the second access network device is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the target value indicates that the retransmission is retransmitted data, not newly transmitted data.

[0118] The method provided in this application embodiment involves a first access network device sending a scheduled first resource to a second access network device. The second access network device can then receive HARQ feedback information sent by a target beam receiving terminal based on the first resource scheduled by the first access network device, thus ensuring the reliability of data transmission.

[0119] It should be noted that the first resource configured by the first access network device and the second resource configured by the second access network device may be the same or different. However, regardless of whether the first resource configured by the first access network device and the second resource configured by the second access network device are the same, the first access network device will send the configured first resource to the second access network device, and the second access network device will receive HARQ feedback information based on the sent first resource.

[0120] exist Figure 3 Based on the illustrated embodiment, the terminal returns HARQ feedback information based on the second resources scheduled by the second access network device, see [link to example]. Figure 7 The method includes:

[0121] Step 701: If the access network device to which the target beam belongs is the second access network device, the second access network device sends scheduling information to the terminal. The scheduling information is used to schedule the second resource.

[0122] Step 702: If the access network device to which the target beam belongs is the second access network device, the terminal receives the scheduling information sent by the second access network device.

[0123] In this embodiment, if the access network device to which the target beam belongs is a second access network device, and the HARQ feedback information of the downlink data sent by the first access network device needs to be fed back through the target beam, for these downlink data that need to feed back HARQ feedback information, the second access network device will schedule a second resource for the terminal through scheduling information. The terminal receives the scheduling information sent by the second access network device, and can determine the second resource scheduled by the second access network device based on the scheduling information, and transmit the HARQ feedback information of the downlink data based on the scheduled second resource.

[0124] For example, if the scheduling information is carried in DCI signaling, the DCI signaling can be DCI format 0_1, or DCI format 1_1, or other values.

[0125] Optionally, the scheduling information may also include information about a second resource indicating HARQ feedback information for transmitting downlink data to be fed back. For example, the scheduling information may include 1 bit, which may be 0 or 1, and this embodiment of the application does not limit this.

[0126] Step 703: The terminal sends HARQ feedback information of downlink data to the second access network device based on the second resource.

[0127] Step 704: The second access network device provides HARQ feedback information based on the downlink data sent by the second resource receiving terminal.

[0128] In this embodiment, the second access network device schedules a second resource for the terminal. When the terminal needs to send HARQ feedback information for downlink data, it sends the downlink data HARQ feedback information to the second access network device based on the second resource scheduled by the second access network device for the terminal. The second access network device will also receive the HARQ feedback information sent by the terminal on the second resource.

[0129] In some embodiments, when the access network device to which the target beam belongs is a second access network device, the terminal saves the HARQ feedback information of the downlink data and sends the HARQ feedback information to the second access network device based on the second resource.

[0130] If the terminal determines that the access network device to which the target beam belongs is the second access network device, then the HARQ feedback information corresponding to the downlink data is saved. All of these HARQ feedback information needs to be fed back through the target beam. When the HARQ feedback information of the downlink data needs to be fed back, the HARQ feedback information is sent to the second access network device through the second resource scheduled by the second access network device.

[0131] The method provided in this application embodiment ensures the reliability of terminal data transmission by having the terminal return HARQ feedback information based on the second resource scheduled by the second access network device.

[0132] It should be noted that the above embodiments describe how the terminal returns HARQ feedback information. However, if the terminal returns NACK HARQ feedback information, the terminal needs to determine the retransmission resources scheduled by the second access network device and receive the retransmission of downlink data sent by the second access network device based on the scheduled retransmission resources.

[0133] In this embodiment of the application, the second access network device schedules retransmission resources and retransmits downlink data to the terminal based on the scheduled resources. The terminal then receives the downlink data retransmitted by the second access network device based on the determined resources.

[0134] In some embodiments, the HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

[0135] For example, the target value is 1, or the target value is 0.

[0136] In this embodiment, since the second access network device performs downlink data retransmission when the terminal has not received downlink data sent by the first access network device, the HARQ process identifier corresponding to the downlink data sent by the second access network device is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device. This is to indicate the process of downlink data retransmission performed by the second access network device, and to indicate that the retransmission is retransmitted data rather than newly transmitted data through the target value.

[0137] It should be noted that the above embodiments can be split into new embodiments, or combined with other embodiments to form new embodiments. This application does not limit the combination of embodiments.

[0138] Figure 8 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown. See also Figure 8 The device includes:

[0139] The receiving module 801 is used to receive beam indication signaling sent by the first access network device, wherein the beam indication signaling indicates the target beam to be used by the terminal;

[0140] The processing module 802 is used to perform Hybrid Automatic Repeat Request (HARQ) feedback for downlink data through the target beam and the second access network device when the access network device to which the target beam belongs is the second access network device.

[0141] In some embodiments, beam indication signaling includes a TCI state, which includes at least one of the following:

[0142] DU identification information indicates the DU to which the target beam belongs;

[0143] CU identification information indicates the DU to which the target beam belongs.

[0144] In some embodiments, the processing module 802 is further configured to:

[0145] If the access network device to which the target beam belongs is a second access network device, HARQ feedback information for downlink data will not be sent.

[0146] In some embodiments, see Figure 9 The device also includes:

[0147] Module 803 is used to determine the second resource scheduled by the second access network device;

[0148] The receiving module 801 is used to receive downlink data retransmitted by the second access network device through the target beam based on the second resource;

[0149] In this scenario, if the first access network device does not receive HARQ feedback information for the downlink data, the second access network device retransmits the downlink data. The downlink data and the information for the retransmitted downlink data are sent from the first access network device to the second access network device.

[0150] In some embodiments, the processing module 802 is further configured to:

[0151] When the access network device to which the target beam belongs is the second access network device, based on the first resource scheduled by the first access network device, the first access network device sends the HARQ feedback information of downlink data to the second access network device through the target beam, and then sends the scheduled first resource to the second access network device.

[0152] In some embodiments, the processing module 802 is further configured to:

[0153] When the access network device to which the target beam belongs is the second access network device, the scheduling information sent by the second access network device is received, and the scheduling information is used to schedule the second resource;

[0154] HARQ feedback information based on the second resource for sending downlink data to the second access network device.

[0155] In some embodiments, see Figure 9 The device also includes:

[0156] The storage module 804 is used to save the HARQ feedback information of downlink data when the access network equipment to which the target beam belongs is different from the access network equipment to which the currently used beam belongs.

[0157] In some embodiments, the HARQ feedback information is NACK, and the device further includes:

[0158] The determination module 803 is also used to determine the second resource scheduled by the second access network device;

[0159] The processing module 802 is also used to receive downlink data retransmitted by the second access network device based on the second resource.

[0160] In some embodiments, the HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

[0161] In some embodiments, the beam indication signaling is downlink control information (DCI) signaling, or the beam indication signaling is media access control unit (MAC CE) signaling.

[0162] In some embodiments, the access network device to which the target beam belongs is a second access network device, including any of the following:

[0163] The DU to which the second access network device belongs is different from the DU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0164] or,

[0165] The CU to which the second access network device belongs is different from the CU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0166] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0167] Figure 10 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown. See also Figure 10 The device includes:

[0168] The transmitting module 1001 is used to send beam indication signaling to the terminal, the beam indication signaling indicating the target beam to be used by the terminal;

[0169] The processing module 1002 is used to instruct the second access network device to perform Hybrid Automatic Repeat Request (HARQ) feedback for downlink data with the terminal when the access network device to which the target beam belongs is the second access network device.

[0170] In some embodiments, beam indication signaling includes a TCI state, which includes at least one of the following:

[0171] DU identification information indicates the DU to which the target beam belongs;

[0172] CU identification information indicates the DU to which the target beam belongs.

[0173] In some embodiments, the processing module 1002 is further configured to:

[0174] If the access network device to which the target beam belongs is the second access network device, and the HRAQ feedback information for downlink data returned by the terminal is not received, the downlink data and information required for retransmission are sent to the second access network device.

[0175] In some embodiments, the processing module 1002 is further configured to send the scheduled second resource to the second access network device when the access network device to which the target beam belongs is the second access network device;

[0176] The second access network device is used to receive HARQ feedback information sent by the second resource based on scheduling.

[0177] In some embodiments, the access network device to which the target beam belongs is a second access network device, including any of the following:

[0178] The DU to which the second access network device belongs is different from the DU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0179] or,

[0180] The CU to which the second access network device belongs is different from the CU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0181] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0182] Figure 11 A block diagram of a HARQ feedback device provided in an exemplary embodiment of this application is shown. See also Figure 11 The device includes:

[0183] Processing module 1101 is used to provide HARQ feedback on downlink data sent by the target beam receiving terminal when the access network device to which the target beam belongs is a second access network device.

[0184] The target beam is indicated to the terminal by the first access network device through beam indication signaling.

[0185] In some embodiments, beam indication signaling includes a TCI state, which includes at least one of the following:

[0186] DU identification information indicates the DU to which the target beam belongs;

[0187] CU identification information indicates the DU to which the target beam belongs.

[0188] In some embodiments, the processing module 1101 is further configured to:

[0189] If the access network device to which the target beam belongs is the second access network device, and the first access network device has not received the HARQ feedback information of the downlink data, the downlink data is retransmitted to the terminal through the target beam based on the scheduled retransmission resources.

[0190] The information of downlink data and retransmitted downlink data is sent from the first access network device to the second access network device.

[0191] In some embodiments, the processing module 1101 is further configured to:

[0192] When the access network device to which the target beam belongs is the second access network device, based on the first resource scheduled by the first access network device and through the HARQ feedback information of the downlink data sent by the target beam receiving terminal, the first access network device sends the scheduled first resource to the second access network device.

[0193] In some embodiments, the processing module 1101 is further configured to:

[0194] If the access network device to which the target beam belongs is a second access network device, scheduling information is sent to the terminal. The scheduling information is used to schedule the second resource.

[0195] HARQ feedback information based on downlink data sent by the second resource receiving terminal.

[0196] In some embodiments, the HARQ feedback information is NACK, and the processing module 1101 is further configured to:

[0197] Retransmission resources based on scheduling are used to retransmit downlink data to the terminal.

[0198] In some embodiments, the HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

[0199] In some embodiments, the beam indication signaling is DCI signaling, or the beam indication signaling is MAC CE signaling.

[0200] In some embodiments, the access network device to which the target beam belongs is a second access network device, including any of the following:

[0201] The DU to which the second access network device belongs is different from the DU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0202] or,

[0203] The CU to which the second access network device belongs is different from the CU to which the first access network device belongs; the access network device to which the target beam belongs is the second access network device.

[0204] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0205] Figure 12 A schematic diagram of the structure of a communication device provided in an exemplary embodiment of this application is shown. The communication device includes: a processor 1201, a receiver 1202, a transmitter 1203, a memory 1204, and a bus 1205.

[0206] The processor 1201 includes one or more processing cores. The processor 1201 executes various functional applications and information processing by running software programs and modules.

[0207] The receiver 1202 and the transmitter 1203 can be implemented as a communication component, which can be a communication chip.

[0208] The memory 1204 is connected to the processor 1201 via the bus 1205.

[0209] The memory 1204 can be used to store at least one program code, and the processor 1201 is used to execute the at least one program code to implement the various steps in the above method embodiments.

[0210] Furthermore, the communication equipment can be a terminal or an access network device. The memory 1204 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but 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 storage, flash memory, and programmable read-only memory (PROM).

[0211] In an exemplary embodiment, a computer-readable storage medium is also provided, wherein executable program code is stored in the storage medium, the executable program code being loaded and executed by a processor to implement the HARQ feedback method executed by a communication device provided in the above-described method embodiments.

[0212] In an exemplary embodiment, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is run on a terminal or access network device, are used to implement the HARQ feedback method as provided in the various method embodiments.

[0213] In an exemplary embodiment, a computer program product is provided, which, when executed by a processor of a terminal or access network device, is used to implement the HARQ feedback method provided in the various method embodiments described above.

[0214] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0215] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A HARQ feedback method, characterized in that, The method is executed by a terminal, and the method includes: The terminal receives downlink data and beam indication signaling sent by the first access network device, wherein the beam indication signaling indicates the target beam to be used by the terminal. If the access network device to which the target beam belongs is a second access network device, the scheduling information sent by the second access network device is received, and the scheduling information is used to schedule the second resource; HARQ feedback information for the downlink data is sent to the second access network device based on the second resource.

2. The method according to claim 1, characterized in that, The beam indication signaling includes a Transmission Indication Configuration Indication State (TCI state), which includes at least one of the following: Distributed control unit (DU) identification information, wherein the DU identification information indicates the DU to which the target beam belongs; Centralized control unit (CU) identification information, which indicates the CU to which the target beam belongs.

3. The method according to claim 1, characterized in that, The method further includes: Determine the retransmission resources scheduled by the second access network device; Based on the retransmission resources, the second access network device receives the downlink data retransmitted through the target beam; In this process, if the first access network device does not receive HARQ feedback information for the downlink data, the second access network device retransmits the downlink data, and the downlink data and the information required for retransmission are sent from the first access network device to the second access network device.

4. The method according to claim 1, characterized in that, The method further includes: If the access network device to which the target beam belongs is different from the access network device to which the currently used beam belongs, the HARQ feedback information of the downlink data is saved.

5. The method according to claim 1, characterized in that, The HARQ feedback information is a non-acknowledgment (NACK), and the method further includes: Determine the retransmission resources scheduled by the second access network device; The downlink data retransmitted by the second access network device is received based on the retransmission resources.

6. The method according to claim 3 or 5, characterized in that, The HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

7. The method according to any one of claims 1 to 6, characterized in that, The beam indication signaling is either downlink control information (DCI) signaling or media access control unit (MAC CE) signaling.

8. The method according to any one of claims 1 to 6, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

9. A HARQ feedback method, characterized in that, The method is performed by a first access network device, and the method includes: Send downlink data and beam indication signaling to the terminal, wherein the beam indication signaling indicates the target beam to be used by the terminal; If the access network device to which the target beam belongs is a second access network device, then the second resource to be scheduled is sent to the second access network device; The second access network device is used to receive HARQ feedback information of the downlink data sent by the terminal based on the second resource of the schedule.

10. The method according to claim 9, characterized in that, The beam indication signaling includes a TCI state, which includes at least one of the following: DU identification information, wherein the DU identification information indicates the DU to which the target beam belongs; CU identification information, which indicates the DU to which the target beam belongs.

11. The method according to claim 9, characterized in that, When the access network device to which the target beam belongs is a second access network device, instructing the second access network device to perform Hybrid Automatic Repeat Request (HARQ) feedback for downlink data with the terminal through the target beam includes: If the access network device to which the target beam belongs is the second access network device, and the HRAQ feedback information of the downlink data returned by the terminal is not received, the downlink data and the information required for retransmission are sent to the second access network device.

12. The method according to any one of claims 9 to 11, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

13. A HARQ feedback method, characterized in that, The method is performed by a second access network device, and the method includes: If the access network device to which the target beam belongs is a second access network device, scheduling information is sent to the terminal, and the scheduling information is used to schedule the second resource; Based on the second resource, the HARQ feedback information of the downlink data sent by the terminal is received, wherein the downlink data is sent by the first access network device; The target beam is indicated to the terminal by the first access network device via beam indication signaling.

14. The method according to claim 13, characterized in that, The beam indication signaling includes a TCI state, which includes at least one of the following: DU identification information, wherein the DU identification information indicates the DU to which the target beam belongs; CU identification information, which indicates the DU to which the target beam belongs.

15. The method according to claim 13, characterized in that, When the access network device to which the target beam belongs is a second access network device, the HARQ feedback of the downlink data sent by the target beam receiving terminal includes: If the access network device to which the target beam belongs is the second access network device, and the first access network device has not received the HARQ feedback information of the downlink data, the downlink data is retransmitted to the terminal through the target beam based on the scheduled retransmission resources. The downlink data and retransmission information are sent from the first access network device to the second access network device.

16. The method according to claim 13, characterized in that, The HARQ feedback information is NACK, and the method further includes: The downlink data is retransmitted to the terminal based on the retransmission resources of the scheduled retransmission.

17. The method according to claim 16, characterized in that, The HARQ process identifier corresponding to the retransmitted downlink data is the same as the HARQ process identifier corresponding to the downlink data sent by the first access network device, and the retransmitted downlink data corresponds to a target value, the target value indicating that the retransmitted downlink data is retransmitted data.

18. The method according to any one of claims 13 to 17, characterized in that, The beam indication signaling is DCI signaling, or the beam indication signaling is MAC CE signaling.

19. The method according to any one of claims 13 to 18, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

20. A HARQ feedback device, characterized in that, The device includes: The receiving module is used to receive downlink data and beam indication signaling sent by the first access network device, wherein the beam indication signaling indicates the target beam to be used by the terminal; The processing module is configured to, when the access network device to which the target beam belongs is a second access network device, receive scheduling information sent by the second access network device, the scheduling information being used to schedule a second resource; and send HARQ feedback information of the downlink data to the second access network device based on the second resource.

21. The apparatus according to claim 20, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

22. A HARQ feedback device, characterized in that, The device includes: The transmitting module is used to send downlink data and beam indication signaling to the terminal, wherein the beam indication signaling indicates the target beam to be used by the terminal; The processing module is configured to send a scheduled second resource to the second access network device when the access network device to which the target beam belongs is a second access network device; the second access network device is configured to receive the downlink data HARQ feedback information sent by the terminal based on the scheduled second resource.

23. The apparatus according to claim 22, characterized in that, The beam indication signaling includes a TCI state, which includes at least one of the following: DU identification information, wherein the DU identification information indicates the DU to which the target beam belongs; CU identification information, which indicates the DU to which the target beam belongs.

24. The apparatus according to claim 22, characterized in that, The processing module is further configured to: If the access network device to which the target beam belongs is the second access network device, and the HRAQ feedback information of the downlink data returned by the terminal is not received, the downlink data and the information required for retransmission are sent to the second access network device.

25. The apparatus according to any one of claims 22 to 24, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

26. A HARQ feedback device, characterized in that, The device includes: The processing module is used to send scheduling information to the terminal when the access network device to which the target beam belongs is a second access network device, wherein the scheduling information is used to schedule the second resource; The processing module is further configured to receive HARQ feedback information of downlink data sent by the terminal based on the second resource, wherein the downlink data is sent by the first access network device; wherein the target beam is indicated to the terminal by the first access network device through beam indication signaling.

27. The apparatus according to claim 26, characterized in that, The beam indication signaling includes a TCI state, which includes at least one of the following: DU identification information, wherein the DU identification information indicates the DU to which the target beam belongs; CU identification information, which indicates the DU to which the target beam belongs.

28. The apparatus according to claim 26, characterized in that, The processing module is further configured to: If the access network device to which the target beam belongs is the second access network device, and the first access network device has not received the HARQ feedback information of the downlink data, the downlink data is retransmitted to the terminal through the target beam based on the scheduled retransmission resources. The downlink data and retransmission information are sent from the first access network device to the second access network device.

29. The apparatus according to any one of claims 26 to 28, characterized in that, The access network device to which the target beam belongs is the second access network device, including any of the following situations: The DU to which the second access network device belongs is different from the DU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device; or, The CU to which the second access network device belongs is different from the CU to which the first access network device belongs, and the access network device to which the target beam belongs is the second access network device.

30. A terminal, characterized in that, The terminal includes: processor; A transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the HARQ feedback method as described in any one of claims 1 to 8.

31. An access network device, characterized in that, The access network equipment includes: processor; A transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the HARQ feedback method as described in any one of claims 9 to 19.

32. A computer-readable storage medium, characterized in that, The readable storage medium stores executable program code, which is loaded and executed by a processor to implement the HARQ feedback method as described in any one of claims 1 to 19.

33. A computer program product, characterized in that, When the computer program product is executed by the processor of a terminal or network device, it is used to implement the HARQ feedback method as described in any one of claims 1 to 19.

Images