HARQ feedback method, device and system

Abstract

The invention discloses an HARQ (Hybrid Automatic Repeat reQuest) feedback method, device and system, relates to the technical field of communication, and aims to solve the problem that under an HARQ closing mechanism, a satellite access network device cannot receive feedback information of a terminal and cannot perform link adaptive adjustment, so that the satellite access network device blindly sends scheduling of next data to the terminal, and resource waste is easily caused. The method comprises the following steps: a first communication device acquires first information, and executes an HARQ processing operation corresponding to an HARQ processing mode based on the first information. Wherein the first information indicates an HARQ processing mode of the first communication device; the HARQ processing mode comprises: an HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but feeds back a decoding result of the PDSCH. The scheme of the invention can be widely applied to the fields of communication technology, artificial intelligence, Internet of Vehicles, smart home networking and the like.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a hybrid automatic repeat request (HARQ) feedback method, device and system. Background Art

[0002] Non-terrestrial networks (NTN) include satellite communication systems, high altitude platform systems (HAPS) and air-to-ground networks. So far, the focus of the 3rd generation partnership project (3GPP) on NTN has been satellite communication networks. The integration of satellite communication networks and ground-based fifth-generation mobile communication technology (5G) networks can provide ubiquitous coverage without being restricted by the terrain. However, the communication distance between satellite communication equipment (or satellite access network equipment) and terminals is far, and there is a problem of large communication delay.

[0003] In the NTN scenario, considering the large communication delay between the satellite access network equipment and the terminal, 3GPP introduced the HARQ shutdown mechanism. Under the HARQ shutdown mechanism, the terminal does not need to send feedback information to the satellite access network equipment, and the satellite access network equipment does not need to wait for the feedback information sent by the terminal. After sending the previous data, the satellite access network equipment can send the next data schedule to the terminal.

[0004] However, since the satellite access network equipment cannot receive feedback information from the terminal, it is unable to make adaptive link adjustments based on the feedback information from the terminal, resulting in the satellite access network equipment blindly sending the next data schedule to the terminal, which easily leads to a waste of resources. Summary of the invention

[0005] The embodiments of the present application provide a hybrid automatic repeat request feedback method, device and system to solve the problem that under the HARQ off mechanism, the satellite access network device cannot receive the feedback information of the terminal and cannot make link adaptive adjustment based on the feedback information of the terminal, which causes the satellite access network device to blindly send the next data scheduling to the terminal, which easily causes resource waste.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a HARQ feedback method, which can be executed by a first communication device and a functional module or chip in the first communication device, and the method includes: the first communication device obtains first information indicating a HARQ processing mode of the first communication device, and based on the first information, performs a HARQ processing operation corresponding to the HARQ processing mode. The HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the physical downlink shared channel (PDSCH) is fed back.

[0008] Based on the method described in the first aspect, the first communication device can perform HARQ processing operations corresponding to the HARQ processing modes for different HARQ processing modes, thereby improving the accuracy of the first communication device in performing the HARQ processing operations. Further, the first communication device can implement feedback of the PDSCH decoding result to the satellite access network device based on the first information when the HARQ process is turned off, thereby enabling the satellite access network device to obtain a gain in feedback of the PDSCH decoding result.

[0009] In one possible design, the first information includes a state of a HARQ feedback resource field in downlink control information (DCI), and first indication information for indicating a state of a HARQ process. The state of the HARQ process includes a HARQ process shutdown or a HARQ process startup. Based on this possible design, two states of the HARQ process are indicated by the first indication information, which saves signaling overhead, and at the same time, the HARQ processing mode can be indicated based on the state of the HARQ feedback resource field in the DCI and the first indication information.

[0010] In one possible design, the first information indicates the HARQ processing mode of the first communication device, including: when the first indication information indicates that the HARQ process is turned off and the state of the HARQ feedback resource field is the first state, the first information indicates that the HARQ process of the first communication device is turned off; or, when the first indication information indicates that the HARQ process is turned off and the state of the HARQ feedback resource field is other than the first state, the first information indicates that the HARQ process of the first communication device is turned off, but the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

[0011] Based on this possible design, when the first indication information indicates that the HARQ process is closed, the HARQ processing mode of the first communication device indicated by the first information is given when the state of the HARQ feedback resource field is the first state; and when the state of the HARQ feedback resource field is the first state other than the first state, the HARQ processing mode of the first communication device indicated by the first information is given. Further, the state of the HARQ feedback resource field is divided into the first state and other states except the first state. When the first indication information indicates that the HARQ process is closed, the HARQ processing mode of the first communication device is indicated simply and quickly through the state of the HARQ feedback resource field.

[0012] In one possible design, the first information indicates the HARQ processing mode of the first communication device, including: when the first indication information indicates that the HARQ process is turned on and the state of the HARQ feedback resource field is the first state, the first information indicates that the HARQ process of the first communication device is turned off, and the decoding result of the PDSCH is not fed back; or, when the first indication information indicates that the HARQ process is turned on and the state of the HARQ feedback resource field is other than the first state, the first information indicates that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field.

[0013] Based on this possible design, when the first indication information indicates that the HARQ process is turned on, the HARQ processing mode of the first communication device indicated by the first information is given when the state of the HARQ feedback resource field is the first state; and when the state of the HARQ feedback resource field is the first state other than the first state, the HARQ processing mode of the first communication device indicated by the first information is given. Further, the state of the HARQ feedback resource field is divided into the first state and other states except the first state. When the first indication information indicates that the HARQ process is turned on, the HARQ processing mode of the first communication device is indicated simply and quickly through the state of the HARQ feedback resource field.

[0014] In one possible design, the first information is radio resource control (RRC) information indicating the state of the HARQ process, and / or the first information may be RRC information indicating the state of the HARQ process and all HARQ processes are closed. The state of the HARQ process includes the HARQ process being turned on or the HARQ process being turned off. Specifically, the RRC information may include bit information for indicating whether the HARQ process of the first communication device performs HARQ feedback.

[0015] Based on this possible design, the two states of the HARQ process can be indicated by the RRC information specified in the standard, reducing the signaling overhead. At the same time, the RRC information includes bit information, which can flexibly indicate whether each HARQ process of the first communication device performs HARQ feedback. For example, when the RRC information includes at least one bit, the at least one bit corresponds to at least one process, and one bit is used to indicate whether the process corresponding to the bit performs HARQ feedback; when the RRC information includes one bit, one bit is used to indicate whether all processes perform HARQ feedback.

[0016] In one possible design, when the RRC information indicates that the HARQ process is turned on, the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field; when the RRC information indicates that the HARQ process is turned off, the HARQ process of the first communication device is turned off, but the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field.

[0017] Based on this possible design, the HARQ processing mode of the first communication device is directly and clearly indicated through the RRC information. Further, when the RRC information indicates that the HARQ process is turned off, the HARQ process of the first communication device is turned off, and the decoding result of the PDSCH is still fed back on the feedback resource indicated by the HARQ feedback resource field, so that the first communication device can obtain the gain of the HARQ process being turned off and the system throughput being increased, and the satellite access network device can also obtain the decoding result of the PDSCH.

[0018] In one possible design, the first information includes a state of a HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field corresponds to an indication of a HARQ processing mode of the first communication device. Based on this possible design, the HARQ processing mode of the first communication device is indicated by the state of the HARQ feedback resource field in the DCI, and there is no need to configure specific indication information to indicate the HARQ processing mode of the first communication device, thereby reducing the signaling overhead of indicating the HARQ processing mode.

[0019] In one possible design, the state of the HARQ feedback resource field corresponds to an indication of a HARQ processing mode of the first communication device, including: when the state of the HARQ feedback resource field is a first state, indicating that the HARQ process of the first communication device is closed, and the first communication device does not feedback the decoding result of the PDSCH; when the state of the HARQ feedback resource field is a second state, indicating that the HARQ process of the first communication device is closed, but the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field; when the state of the HARQ feedback resource field is other states except the first state and the second state, indicating that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

[0020] Alternatively, the state of the HARQ feedback resource field corresponds to an indication of a HARQ processing mode of the first communication device, including: when the state of the HARQ feedback resource field is a first state, indicating that the HARQ process of the first communication device is closed, but the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field; when the state of the HARQ feedback resource field is a second state, indicating that the HARQ process of the first communication device is closed, and the first communication device does not feed back the decoding result of the PDSCH; when the state of the HARQ feedback resource field is a state other than the first state and the second state, indicating that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

[0021] Based on this possible design, the state of the HARQ feedback resource field is multiplexed to efficiently indicate the HARQ processing mode of the first communication device. At the same time, the HARQ processing mode of the first communication device can be flexibly adjusted by changing the state of the HARQ feedback resource field in the DCI.

[0022] In one possible design, the indication meaning corresponding to the status of the HARQ feedback resource field is configured by the satellite access network device; and / or, the indication meaning corresponding to the status of the HARQ feedback resource field is agreed upon by the protocol.

[0023] Based on this possible design, the indication meaning corresponding to the state of the HARQ feedback resource field can be configured in different ways, which improves the flexibility of configuring the indication meaning corresponding to the state of the HARQ feedback resource field. Further, when the indication meaning corresponding to the state of the HARQ feedback resource field is agreed upon by the protocol, the signaling overhead of configuring the indication meaning corresponding to the state of the HARQ feedback resource field is saved.

[0024] In one possible design, the first state is configured by the satellite access network equipment based on the balance of resources, and the second state is configured by the satellite access network equipment or agreed upon by protocol.

[0025] Based on this possible design, the satellite access network device can configure the first state according to the balance of resources, so that the configuration of the first state is more suitable for the actual scenario. The second state is configured by the satellite access network device or agreed upon by the protocol, which improves the flexibility of configuring the second state; further, when the second state is agreed upon by the protocol, the signaling overhead of configuring the second state is saved.

[0026] In one possible design, the first information includes a status of a HARQ feedback resource field in the DCI, and the status of the HARQ feedback resource field is used to indicate a HARQ processing mode of the first communication device in combination with whether the first communication device turns on a HARQ enhancement mode.

[0027] Based on this possible design, the state of the HARQ feedback resource field in the DCI is reused to efficiently indicate the HARQ processing mode of the first communication device. Further, the HARQ processing mode of the first communication device is indicated by combining the state of the HARQ feedback resource field with whether the first communication device turns on the HARQ enhancement mode, so as to flexibly and diversely indicate the HARQ processing mode of the first communication device.

[0028] In one possible design, when the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is the first state, it indicates that the HARQ process of the first communication device is turned off, but the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field; when the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is other than the first state, it indicates that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field.

[0029] Based on this possible design, when the HARQ enhancement mode is turned on, the HARQ processing mode of the first communication device indicated when the state of the HARQ feedback resource field is the first state is given; and the HARQ processing mode of the first communication device indicated when the state of the HARQ feedback resource field is the first state other than the first state is given. Further, the state of the HARQ feedback resource field is divided into the first state and other states except the first state. When the HARQ enhancement mode is turned on, the HARQ processing mode of the first communication device is indicated simply and quickly through the state of the HARQ feedback resource field.

[0030] In one possible design, when the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is the first state, it indicates that the HARQ process of the first communication device is turned off and the decoding result of the PDSCH is not fed back; when the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is other than the first state, it indicates that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field.

[0031] Based on this possible design, when the HARQ enhancement mode is turned off, the HARQ processing mode of the first communication device indicated when the state of the HARQ feedback resource field is the first state is given; and the HARQ processing mode of the first communication device indicated when the state of the HARQ feedback resource field is the first state other than the first state is given. Further, the state of the HARQ feedback resource field is divided into the first state and other states except the first state. When the HARQ enhancement mode is turned off, the HARQ processing mode of the first communication device is indicated simply and quickly through the state of the HARQ feedback resource field.

[0032] In one possible design, the first communication device receives second indication information indicating whether to turn on the HARQ enhancement mode. The second indication information is carried in the DCI from the satellite access network device, and / or the second indication information is agreed upon by the protocol.

[0033] Based on this possible design, the first communication device can directly determine whether to enable the HARQ enhancement mode through the second indication information. Further, when the second indication information is carried in the DCI from the satellite access network device, the DCI is reused to indicate whether to enable the HARQ enhancement mode, thereby reducing the signaling overhead of separately configuring the second indication information; when the second indication information is agreed upon by the protocol, the signaling overhead of configuring the second indication information is reduced.

[0034] In one possible design, the first communication device performs a HARQ processing operation corresponding to the HARQ processing mode based on the first information, including: when the HARQ process is turned on, the first communication device blindly detects the PDCCH after a first time period after the reception of the PDSCH is completed, and the first time period includes: the delay between the PDSCH and the HARQ-ACK feedback, the time occupied by the HARQ-ACK feedback, the decoding time of the first communication device, and the round-trip transmission time between the first communication device and the satellite access network equipment; when the HARQ process is turned off, the first communication device blindly detects the PDCCH after a second time period after the reception of the PDSCH is completed, and the second time period includes: the decoding time of the first communication device; when the HARQ process is turned off but the decoding result of the physical downlink shared channel PDSCH is fed back, the first communication device blindly detects the PDCCH after a second time period after the reception of the PDSCH is completed, and the second time period includes the decoding time of the first communication device.

[0035] Based on this possible design, the first communication device can implement and execute the HARQ processing operation corresponding to the HARQ processing mode. Further, when the HARQ processing mode is that the HARQ process is closed but the decoding result of the physical downlink shared channel PDSCH is fed back, the first communication device can blindly detect the PDCCH as early as possible, which can not only increase the throughput of the system, but also feed back the decoding result of the PDSCH to the satellite access network device in a timely manner.

[0036] In a second aspect, the present application provides a communication device, which may be a first communication device or a chip or system on chip in the first communication device, or a functional module in the first communication device for implementing the first aspect or any possible design of the first aspect. The communication device may implement the functions performed by the first communication device in the above-mentioned first aspect or any possible design of the first aspect, and the functions may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the communication device may include a communication unit and a processing unit. Among them, the transceiver unit is used to obtain first information indicating the HARQ processing mode of the first communication device; the processing unit is used to perform a HARQ processing operation corresponding to the HARQ processing mode based on the first information.

[0037] Specifically, the relevant descriptions of the first information, HARQ processing mode, and HARQ processing operations may refer to the first aspect or any possible design of the first aspect. At the same time, the execution actions of each unit of the communication device may refer to the first aspect or any possible design of the first aspect, and will not be repeated here.

[0038] In a third aspect, the present application provides a communication device, which may be a first communication device or a chip or system on chip in the first communication device. The communication device may implement the function performed by the first communication device in the above-mentioned first aspect or a possible design of the first aspect, and the function may be implemented by hardware. In one possible design, the communication device includes a processor and a communication interface. Among them, the processor and the communication interface are used to support the communication device to execute the HARQ feedback method in the first aspect or any possible design of the first aspect. In another possible design, the communication device may also include a memory, the memory being used to store computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer-executable instructions stored in the memory so that the communication device executes the hybrid automatic repeat request feedback method as described in the above-mentioned first aspect or any possible design of the first aspect.

[0039] In a fourth aspect, the present application provides a communication system, which includes a satellite access network device, and a communication device as provided in the second aspect or the communication device provided in the third aspect.

[0040] In a fifth aspect, the present application provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed on a computer, the computer executes the HARQ feedback method in the first aspect or any possible design of the first aspect.

[0041] In a sixth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are executed on a computer, the computer executes the HARQ feedback method in the first aspect or any possible design of the first aspect.

[0042] Among them, the technical effects brought about by any design method in the third to sixth aspects can refer to the technical effects brought about by the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application;

[0044] Figure 2a It is a schematic diagram of an NTN communication system architecture;

[0045] Figure 2b It is a schematic diagram of an NTN communication system architecture;

[0046] Figure 3 is a schematic diagram of an NTN communication system;

[0047] Figure 4A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0048] Figure 5 A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0049] Figure 6 A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0050] Figure 7 A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0051] Figure 8 A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0052] Fig. 9 A flow chart of a hybrid automatic repeat request feedback method provided in an embodiment of the present application;

[0053] Fig.10 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0054] Fig.11 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] Before introducing the embodiments of the present application, some technical terms involved in the embodiments of the present application are explained. It should be noted that the following explanations are intended to make the embodiments of the present application easier to understand and should not be regarded as limiting the scope of protection required by the embodiments of the present application.

[0056] Non-terrestrial networks (NTN) implement fifth-generation (5G) communications through satellite or drone platforms, providing ubiquitous coverage capabilities for terminals without being restricted by terrain. In particular, in places where ground network equipment cannot be popularized, such as in extreme areas such as deserts, oceans, and high altitudes, NTN can be used to complete network coverage and improve coverage. NTN does not consider high elliptical orbit (HEO) satellite systems, but only targets low earth orbit (LEO) / medium earth orbit (MEO) / geostationary earth orbit (GEO) / unmanned aircraft system (UAS) scenarios. Table 1 gives the height of different NTN platforms from the ground, the earth orbit information they are in, and the coverage information of the corresponding beams.

[0057] The NTN communication system includes the space segment, the ground segment and the user end. Among them, the space segment mainly refers to the constellation composed of multiple satellite access network devices in the sky, and the communication link (inter-satellite link, ISL, also called inter-satellite link) between satellite access network devices. The ground segment mainly includes ground stations (also called gateway stations), as well as auxiliary parts such as service control, monitoring management, and time injection. Network equipment such as transmission equipment and core network equipment in the ground network can also be regarded as part of the ground segment. The user segment refers to the terminal that accesses the satellite access network equipment, mainly including antennas (what we often call "pots"), signal processing and network access capability equipment (such as routers, etc.), and terminals that access the network (mobile phones, computers, etc.). Different satellite access network devices are connected through optional inter-satellite links. The inter-satellite links can be wireless interfaces (such as Xn interfaces) or optical interfaces, which can be defined by GPP or non-3GPP. The service link (service link) between the terminal and the satellite access network equipment is realized through the new radio (NR). The feeder link between the satellite access network equipment and the ground station (gateway) is implemented through a 3GPP or non-3GPP wireless interface (such as an NG interface). At the same time, the satellite access network equipment (or UAS platform) usually generates multiple beams over a given service area within its coverage area, and achieves cell coverage through the beams to provide network services to the terminal. The coverage of the satellite access network equipment (or UAS platform) depends on the airborne antenna diagram and its minimum elevation angle. The coverage shape of the beam is usually elliptical.

[0058] Table 1

[0059]

[0060] There are two typical architecture modes of NTN communication system, namely transparent mode and regenerative mode. In transparent mode, the satellite (or UAS platform) payload can perform frequency conversion and RF amplification in the uplink and downlink directions. In this mode, the role of the satellite is equivalent to an analog RF repeater. In regenerative mode, the satellite (or UAS platform) payload will reprocess the signal received from the earth terminal. In this mode, the satellite has the same functions as a ground base station, demodulating / decoding, switching or routing, encoding / modulating, etc., which is equivalent to the satellite having all or part of the functions of a base station. The above-mentioned satellite payload refers to the instruments and equipment installed on the satellite that are used to directly realize a certain function of the satellite, such as cameras used on remote sensing satellites, communication repeaters and communication antennas used on communication satellites, etc.

[0061] Hybrid automatic repeat request (HARQ) is a technology that combines forward error correction (FEC) and automatic repeat request (ARQ) to improve data transmission reliability and system throughput. When the data transmission between the transmitter and the receiver follows the mechanism of HARQ activation, the transmitter (e.g., access network equipment) relies on the feedback information sent by the receiver (e.g., terminal), such as the decoding result of PDSCH, to determine the scheduling information for sending the next data to the receiver.

[0062] Exemplarily, the transmitting end is an access network device, and the receiving end is a terminal. When the data transmission between the access network device and the terminal follows the mechanism of HARQ activation, after the terminal receives the physical downlink shared channel (PDSCH) scheduling sent by the access network device, it decodes the data carried by the PDSCH. Subsequently, the terminal feeds back the decoding result to the access network device and blindly detects the physical downlink control channel (PDCCH) after the end of the PDSCH to receive the next scheduling information sent by the access network device. RTT is the total delay experienced from the terminal feeding back the decoding result to receiving the next scheduling. From the start of the access network device sending data to the access network device receiving the decoding result (or feedback information) from the terminal, the total delay experienced. Among them, the terminal feeds back the decoding result to the access network device, and there are two situations: if the terminal data is decoded successfully, the terminal sends an acknowledgment (ACK) message to the access network device; if the terminal data is decoded unsuccessfully, the terminal sends a negative acknowledgment (NACK) message to the access network device. Correspondingly, if the access network device receives ACK information sent by the terminal, it sends scheduling information of new data to the terminal; if the access network device receives NACK information sent by the terminal, it sends scheduling information of the same data as the last PDSCH carrying data to the terminal.

[0063] From the above, it can be seen that when the data transmission between the transmitter and the receiver follows the HARQ on mechanism, the transmitter starts blind detection of the PDCCH after the RTT time after the PDSCH ends. In the NTN scenario, when the transmitter is a satellite access network device and the receiver is a first communication device, considering the problem of large communication delay between the satellite access network device and the first communication device, 3GPP introduces the HARQ off mechanism. Under the HARQ off mechanism, the first communication device does not need to send feedback information to the satellite access network device, and the satellite access network device does not need to wait for the feedback information sent by the first communication device to send the next data schedule to the first communication device. Since the satellite access network device cannot receive the feedback information from the first communication device and cannot make link adaptive adjustments, the satellite access network device blindly sends the next data schedule to the first communication device, which easily causes a waste of resources.

[0064] Exemplarily, the transmitting end is a satellite access network device, and the receiving end is a first communication device. When the data transmission between the satellite access network device and the first communication device follows the HARQ shutdown mechanism, after the first communication device receives the PDSCH scheduling sent by the access network device, it decodes the data carried by the PDSCH, and does not feed back the decoding result to the satellite access network device. Subsequently, after the decoding time is exceeded after the PDSCH ends, the first communication device starts blind detection of the PDCCH to receive the next scheduling information sent by the access network device. Correspondingly, the satellite access network device cannot receive the decoding result of the first communication device, so it cannot make link adaptive adjustment, and blindly sends the scheduling of the next data to the first communication device, which is easy to cause the problem of resource waste. For example, one possible situation is that when the first communication device successfully decodes, in order to ensure that the first communication device can correctly decode the previous data, the previous data can be understood as the same data as the previous PDSCH carrying data, and the satellite access network device transmits the previous data to the first communication device multiple times, resulting in resource waste. Another possible situation is that when the first communication device fails to decode, the satellite access network device does not retransmit the previous data, resulting in the first communication device being unable to successfully decode the previous data, resulting in data transmission failure.

[0065] In order to solve the problem that in the HARQ shutdown mechanism, the satellite access network device cannot receive the feedback information of the first communication device and cannot make link adaptive adjustments, which causes the satellite access network device to blindly send the next data scheduling to the terminal, which easily causes resource waste. The present application provides a HARQ feedback method, the method comprising: the first communication device obtains first information indicating the HARQ processing mode of the first communication device, and based on the first information, performs a HARQ processing operation corresponding to the HARQ processing mode. Among them, the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back.

[0066] In this way, multiple HARQ processing modes are designed, so that the HARQ processing mode is not limited to the two modes of HARQ process closure or HARQ process opening, and a processing mode is added in which the first communication device can still feedback the decoding result of PDSCH to the satellite access network device when the HARQ process is closed, so that when the HARQ process is closed, the satellite access network device determines the scheduling of the next data according to the decoding result of PDSCH fed back by the first communication device, thereby avoiding the problem that the satellite access network device cannot receive the feedback information of the first communication device and cannot make link adaptive adjustment, resulting in resource waste. At the same time, when the first communication device needs to feedback the decoding of PDSCH to the satellite access network device, the first communication device can blindly detect PDCCH in advance to enhance the throughput of the system.

[0067] The HARQ feedback method provided in the embodiment of the present application is described below in conjunction with the accompanying drawings.

[0068] The technical solution of the embodiments of the present application can be used in various communication systems, which may be a satellite communication system, a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, or a fifth generation (5G) mobile communication system, a new radio (NR) system, a beyond 5G (B5G) mobile communication system, a sixth generation (6G) mobile communication system, a new air interface vehicle to everything (NR V2X) system, and may also be applied to a system of LTE and 5G hybrid networking, or a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), and other next generation communication systems, and may also be a non-3GPP communication system without limitation.

[0069] The technical solutions of the embodiments of the present application can be applied to various communication scenarios, for example, one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communications (mMTC), D2D, V2X, and IoT and other communication scenarios.

[0070] The technical solution of the embodiment of the present application can be executed by a first communication device, which can be a communication device with wireless communication function, including but not limited to a handheld communication device, a vehicle-mounted communication device, and a wearable communication device. The following description takes the first communication device as a terminal device as an example.

[0071] See also Figure 1 , a communication system provided in an embodiment of the present application, the communication system includes an access network device and a first communication device (eg, a terminal) connected to the access network device. Figure 1The access network device in the example may be a satellite access network device deployed in the air (eg, a satellite base station). The first communication device may perform data interaction with the access network device within the coverage of the access network device, and receive network services provided by the access network device.

[0072] The first communication device involved in the present application may be a terminal equipment (terminal equipment) or a user equipment (user equipment, UE) or a mobile station (mobile station, MS) or a mobile terminal (mobile terminal, MT), etc. Specifically, the terminal may be a mobile phone, a tablet computer or a computer with a wireless transceiver function, or a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a smart home, a vehicle-mounted terminal, etc. In the embodiment of the present application, the device for realizing the function of the first communication device may be the first communication device, or may be a device that can support the first communication device to realize the function, such as a chip system (such as a processing system composed of one chip or multiple chips) or a modem. The following takes the device for realizing the function of the first communication device as the first communication device as an example to describe the HARQ feedback method provided in the embodiment of the present application.

[0073] The access network device involved in the present application is a device in a radio access network (RAN) that connects a first communication device to a wireless network. The RAN can be connected to a core network (for example, it can be an LTE core network or a 5G core network, etc.). The access network device can be a satellite base station (or flying platform) in an NTN scenario, an evolutionary Node B (eNB or eNodeB) in LTE, or a base station in a 5G network or a future evolved public land mobile network (PLMN), a broadband network gateway (BNG), an aggregation switch or a non-3GPP access device; or the access network device in the embodiment of the present application can also be a wireless controller in a cloud radio access network (CRAN); or a transmission and reception point (TRP), or a device including a TRP, etc., which is not specifically limited in the embodiment of the present application. Optionally, the access network equipment in the embodiments of the present application may include various forms of base stations, such as: satellite base stations, macro base stations, micro base stations (also called small stations), relay stations, access points, etc., which are not specifically limited in the embodiments of the present application.

[0074] The technical solution of the embodiment of the present application can also be applied to long-distance communication scenarios, such as satellite communication scenarios in which the communication distance between the first communication device and the satellite access network device is long and the communication delay is large, or other long-distance communication scenarios, etc., without limitation.

[0075] For example, when the technical solution of the embodiment of the present application is applied to a satellite communication scenario, a possible communication system architecture is as follows: Figure 2a The system architecture includes a first communication device, a satellite access network device, a ground station, a wireless access network device, a core network device, a data network, an air interface, and an NG interface.

[0076] Among them, the first communication device can access the satellite access network equipment through the air interface and initiate calls, Internet access and other services, including but not limited to mobile devices that support the new air interface, typically mobile phones, tablet computers and other mobile devices.

[0077] Among them, the satellite access network equipment is in transparent transmission mode and does not have the function of reprocessing the received signal. It is used to implement frequency conversion and RF amplification of the received signal.

[0078] Among them, the ground station is used to forward signaling and business data between satellite access network equipment and core network equipment.

[0079] The wireless access network equipment is used to provide wireless access services, schedule wireless resources to the first communication device, and provide reliable wireless transmission protocols and data encryption protocols.

[0080] Among them, the core network equipment is used to control user access, mobility management, session management, user authentication, billing and other services.

[0081] The data network is used to provide application services for the first communication device.

[0082] The air interface is a wireless link between the first communication device and the satellite access network equipment.

[0083] Among them, the NG interface is the interface between the wireless access network equipment and the core access network equipment, the interface between the satellite access network equipment and the ground station, and the interface between the ground station and the core network equipment. It is mainly used for interactive non-access stratum (NAS) signaling and user business data.

[0084] It should be understood that when the system is a fourth-generation mobile communication system, the NG interface can be replaced by the S1 interface.

[0085] For example, when the technical solution of the embodiment of the present application is applied to a satellite communication scenario, another possible communication system architecture is as follows: Figure 2b The system architecture includes a first communication device, a satellite access network device, a ground station, a core network device, a data network, an air interface, and an NG interface.

[0086] Among them, the satellite access network equipment is in a regenerative mode and has the function of reprocessing the received signals. At this time, the satellite access network equipment has all or part of the functions of the ground access network equipment.

[0087] The description of the first communication device, ground station, core network equipment, data network, air interface, and NG interface can be referred to in Figure 2a Described in.

[0088] For example, when the technical solution of the embodiment of the present application is applied to a satellite communication scenario, another possible communication system architecture is as follows: Figure 3 The communication architecture includes a first communication device 1, a first communication device 2, a satellite access network device 1, a satellite access network device 2, a ground station, a core network device, a data network, an air interface, an NG interface, and an Xn interface.

[0089] Among them, the Xn interface is the interface between satellite access network equipment and satellite access network equipment, which is mainly used for interactive signaling.

[0090] There may be a wireless link between satellite access network device 1 and satellite access network device 2. If satellite access network device 1 and satellite access network device 2 are in transparent transmission mode, transparent transmission and forwarding of signals are realized between satellite access network devices. If satellite access network device 1 and satellite access network device 2 are in regenerative mode, signaling interaction and user data transmission are realized between satellite access network devices.

[0091] The related descriptions of the first communication device 1 and the first communication device 2 can be referred to in Figure 2a The description of the first communication device in the description of the ground station, core network equipment, data network, air interface, NG interface can refer to Figure 2a Described in.

[0092] It should be understood that when the system is a fourth-generation mobile communication system, the Xn interface can be replaced by an X2 interface, and the NG interface can be replaced by an S1 interface.

[0093] Optional, Figure 1 Each device in the communication device (such as a terminal, an access network device, etc.) may also be referred to as a communication device, which may be a general device or a dedicated device, and the embodiments of the present application do not specifically limit this.

[0094] Optional, this application Figure 1 The related functions of each device in the network can be implemented by one device, or by multiple devices together, or by one or more functional modules in one device, and the embodiments of the present application do not specifically limit this. It is understandable that the above functions can be network elements in hardware devices, or software functions running on dedicated hardware, or a combination of hardware and software, or virtualization functions instantiated on a platform (e.g., a cloud platform).

[0095] Combine the following Figure 1 The communication system shown describes the HARQ feedback method provided in the embodiment of the present application. The actions, terms, etc. involved in the following embodiments can refer to each other. The message name or parameter name in the message exchanged between devices in each embodiment is only an example, and other names can also be used in the specific implementation. For example, "corresponding" in the following embodiment can be replaced by "associated" and the like.

[0096] Figure 4 A flow chart of a HARQ feedback method provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, it may include:

[0097] S401: The first communication device obtains first information.

[0098] The first information is used to indicate the HARQ processing mode of the first communication device. The HARQ processing mode may include: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back.

[0099] It should be understood that the first information includes but is not limited to being sent by the access network device to the first communication apparatus.

[0100] Specifically, there are multiple possibilities for the content included in the first information, and the specific possible situations are as follows:

[0101] Case 1: The first information includes the state of the HARQ feedback resource field in the downlink control information (DCI) and the first indication information. The first indication information is used to indicate the state of the HARQ process, and the state of the HARQ process includes the HARQ process being turned off or the HARQ process being turned on. Specifically, the relevant description of the information can refer to the following Figure 5 As described in the corresponding embodiments.

[0102] Case 2: The first information is radio resource control (RRC) information. The RRC information is used to indicate the state of the HARQ process; and / or, the RRC information indicates the state of the HARQ process, and all HARQ processes are closed. The state of the HARQ process includes whether the HARQ process is turned on or the HARQ process is turned off; the RRC information includes bit information, and the bit information is used to indicate whether the HARQ process of the first communication device performs HARQ feedback. Specifically, the relevant description of the information can refer to the following Figure 6 As described in the corresponding embodiments.

[0103] Case 3: The first information includes the state of the HARQ feedback resource field in the DCI. The state of the HARQ feedback resource field corresponds to the HARQ processing mode of the first communication device. Specifically, the relevant description of the information can refer to the following Figure 7 and Figure 8 As described in the corresponding embodiments.

[0104] Case 4: The first information includes the state of the HARQ feedback resource field in the DCI. The state of the HARQ feedback resource field is used to indicate the HARQ processing mode of the first communication device in combination with whether the first communication device turns on the HARQ enhancement mode. Specifically, the relevant description of this information can refer to the following Fig. 9 As described in the corresponding embodiments.

[0105] S402: The first communication device performs a HARQ processing operation corresponding to the HARQ processing mode based on the first information.

[0106] Among them, the first communication device performs the HARQ processing operation corresponding to the HARQ processing mode based on the first information, which can be understood as that the first communication device performs different HARQ processing operations under different HARQ processing modes based on the first information. The HARQ processing modes include: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back. It should be understood that the HARQ process is turned off but the decoding result of the PDSCH is fed back, which can also be alternatively described as the HARQ process is turned off but the decoding result of the PDSCH is fed back on the feedback resource, and the feedback resource is the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI.

[0107] Specifically, when the HARQ processing mode of the first communication device is that the HARQ process is turned on, the HARQ processing operation performed by the first communication device is: the first communication device blindly detects the scheduling of PDCCH after the PDSCH ends for a first time period, and the first time period includes: the delay between PDSCH and HARQ-ACK feedback, the time occupied by HARQ-ACK feedback, the decoding time of the first communication device, and the round-trip transmission time between the first communication device and the satellite access network equipment.

[0108] Exemplarily, the first communication device is a terminal, and the access network device is a satellite base station. When the HARQ processing mode of the terminal is HARQ process on, the terminal schedules the blind detection PDCCH after the PDSCH ends, the delay between PDSCH and HARQ-ACK feedback, the time occupied by HARQ-ACK feedback, the decoding duration, and RTT. RTT is the total delay from the terminal feedback of the decoding result to the reception of the next DCI.

[0109] Specifically, when the HARQ processing mode of the first communication device is HARQ process closed, the HARQ processing operation performed by the first communication device is: the first communication device blindly detects the scheduling of PDCCH after a second time period after the reception of PDSCH is completed, and the second time period includes: the decoding time period of the first communication device.

[0110] Exemplarily, the first communication device is a terminal, and the access network device is a satellite base station. When the HARQ processing mode of the terminal is HARQ process closed, the terminal blindly detects the scheduling of PDCCH after the decoding time is exceeded after the reception of PDSCH is completed.

[0111] Specifically, when the HARQ processing mode of the first communication device is that the HARQ process is closed, but the decoding result of PDSCH is fed back, the HARQ processing operation performed by the first communication device is: the first communication device blindly detects the scheduling of PDCCH after a second time period after the reception of PDSCH is completed, and the second time period includes but is not limited to the decoding time period of the first communication device.

[0112] Exemplarily, the first communication device is a terminal, and the access network device is a satellite base station. When the HARQ processing mode of the terminal is that the HARQ process is closed but the decoding result of PDSCH is fed back, the terminal blindly detects the scheduling of PDCCH after the decoding time is exceeded after the reception of PDSCH is completed.

[0113] It should be understood that when the HARQ processing mode of the first communication device is HARQ process off, but the decoding result of PDSCH is fed back, the first communication device blindly detects the scheduling of PDCCH after the second time period after receiving PDSCH. At this time, the second time period includes but is not limited to the time period for the first communication device to decode PDSCH.

[0114] For example, the first communication device is a half-duplex first communication device that supports transmitting information in one direction at the same time, and the second duration includes the decoding duration of the first communication device and the time for the first communication device to switch uplink and downlink communication channels. Because, during the decoding period of the half-duplex first communication device, the communication channel of the first communication device is a downlink communication channel, which is used to receive downlink data sent by the access network device; when it is necessary to feed back the decoding result of the PDSCH to the access network device, the first communication device needs to switch the communication channel to an uplink communication channel, which is used to feed back the decoding result of the PDSCH to the receiving access network device.

[0115] It should be noted that the first communication device is a half-duplex first communication device, and the HARQ processing mode of the half-duplex first communication device is HARQ process closed, but when the decoding result of PDSCH is fed back, the first communication device blindly detects the scheduling of PDCCH after the decoding time and the time of switching uplink and downlink communication channels after receiving PDSCH. It should be understood that the scheduling of blind detection of PDCCH should avoid the time when the half-duplex first communication device feeds back the decoding result of PDSCH.

[0116] For example, the first communication device is a full-duplex first communication device that supports transmitting information in two directions at the same time, and the second duration includes the decoding duration of the first communication device.

[0117] Further, in the case where the first communication device feeds back the decoding result of the PDSCH to the access network device, the access network device determines the scheduling information of the next data according to the decoding result of the PDSCH fed back by the first communication device.

[0118] based on Figure 4 In the method, the first communication device obtains first information for indicating the HARQ processing mode of the first communication device, and based on the first information, performs a HARQ processing operation corresponding to the HARQ processing mode. The HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back. The problem that in the HARQ off mechanism, the satellite access network device cannot receive the feedback information of the first communication device and cannot make link adaptive adjustments, resulting in the satellite access network device blindly sending the next data scheduling to the terminal, which easily causes a waste of resources.

[0119] Further, when the HARQ processing mode is that the HARQ process is closed but the decoding result of the PDSCH is fed back, the HARQ processing operation performed by the first communication device is: the first communication device blindly detects the scheduling of the PDCCH after a second time period after receiving the PDSCH, and the second time period includes the decoding time period of the first communication device. In the case where the first communication device needs to feed back the decoding of the PDSCH to the satellite access network device, the first communication device blindly detects the scheduling of the PDCCH in advance, thereby enhancing the goal of system throughput.

[0120] In the following, the first communication device is a terminal, the access network device is a satellite base station, and the first information includes the state of the HARQ feedback resource field in the DCI and the first indication information as an example. Figure 5 right Figure 4 The HARQ feedback method shown is introduced in detail.

[0121] Figure 5 A flow chart of a HARQ feedback method provided in an embodiment of the present application is as follows: Figure 5 As shown, the method may include:

[0122] S501: The satellite base station sends first indication information to the terminal. Correspondingly, the terminal receives the first indication information.

[0123] Among them, the first indication information is used to indicate the state of the HARQ process, and the state of the HARQ process includes HARQ process closing or HARQ process opening. Specifically, the HARQ process refers to the complete process from the satellite base station sending a PDSCH scheduling to the terminal to the satellite base station receiving the feedback information of the terminal about this PDSCH scheduling. For example, in 5G, the terminal supports parallel processing of multiple HARQ processes, and can support parallel processing of up to 32 HARQ processes. The HARQ process is closed, which means that the satellite base station sends a PDSCH scheduling to the terminal, and the terminal does not need to send feedback information about this PDSCH scheduling to the satellite base station. The HARQ process is turned on, which means that the satellite base station sends a PDSCH scheduling to the terminal, and the terminal sends feedback information about this PDSCH scheduling to the satellite base station in the HARQ feedback resource.

[0124] In one possible scenario, the first indication information is carried in the RRC signaling, and the first indication information may include but is not limited to the feedback bitmap Bitmap of the HARQ process. The feedback bitmap Bitmap includes at least one bit, and the at least one bit corresponds to at least one process, and one bit is used to indicate the state of the process corresponding to the bit, whether it is turned on or off. For example, binary bit 0 can indicate that the HARQ process is turned off, and binary bit 1 can indicate that the HARQ process is turned on, or binary bit 0 indicates that the HARQ process is turned on, and binary bit 1 indicates that the HARQ process is turned off, etc., without limitation.

[0125] For example, assuming that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, when binary bit 0 indicates that the HARQ process is closed and binary bit 1 can indicate that the HARQ process is opened, the satellite base station can send RRC signaling carrying the feedback bitmap Bitmap

[01] to the terminal, indicating that HARQ process 1 is closed and HARQ process 2 is opened.

[0126] It should be understood that, when the states of all HARQ processes are the same, the first indication information may be a bit of information carried in the RRC signaling, and the bit of information is used to indicate the states of all HARQ processes. For example, when the states of all HARQ processes are the same, the first indication information is a bit of information carried in the RRC signaling, and the bit of information is configured as 0, indicating that the states of all HARQ processes are closed; the bit of information is configured as 1, indicating that the states of all HARQ processes are opened.

[0127] In another possible case, the first indication information is carried in a media access control control element (MAC CE). MAC CE is a way to exchange control information between the terminal and the network in addition to RRC signaling and NAS signaling, and is used to exchange control information about the MAC layer.

[0128] S502: The satellite base station sends DCI to the terminal. Correspondingly, the terminal receives the DCI.

[0129] Among them, DCI can be used to schedule PDSCH, and DCI can include a HARQ feedback resource field. The HARQ feedback resource field has at least one state, and one state corresponds to one feedback resource. For example, the HARQ feedback resource field can include 4 bits, corresponding to 16 values, that is, 16 states. One possible situation is that the HARQ feedback resource field in the DCI is the HARQ-ACK resource field specified in the standard. Another possible situation is that the HARQ feedback resource field in the DCI is a field specified in the new DCI format for indicating the state of the HARQ feedback resource.

[0130] Optionally, the DCI is carried on the PDCCH and sent to the terminal. The satellite base station sending the DCI to the terminal can be replaced by describing that the satellite base station sends the PDCCH to the terminal, and the PDCCH carries the DCI.

[0131] S503: The satellite base station sends second indication information to the terminal. Correspondingly, the terminal receives the second indication information.

[0132] The second indication information is used to indicate whether the HARQ enhancement mode of the terminal is turned on. The second indication information may be carried in the RRC signaling sent by the satellite base station to the terminal, and / or carried in the DCI sent by the satellite base station to the terminal, and / or agreed upon by the protocol.

[0133] In the case where the second indication information is carried in the RRC signaling sent by the satellite base station to the terminal, the RRC signaling is used to indicate whether the HARQ enhancement mode of the terminal is turned on.

[0134] In one possible case, the RRC signaling includes but is not limited to a binary bit, and the binary bit is used to indicate whether the HARQ enhancement mode of the terminal is turned on. For example, binary bit 0 may indicate that the HARQ enhancement mode of the terminal is turned off, and binary bit 1 may indicate that the HARQ enhancement mode of the terminal is turned on, or binary bit 0 indicates that the HARQ enhancement mode of the terminal is turned on, and binary bit 1 indicates that the HARQ enhancement mode of the terminal is turned off, etc., without limitation.

[0135] In the case where the second indication information is carried in the DCI sent by the satellite base station to the terminal, the second indication information includes but is not limited to a binary bit, and the binary bit is used to indicate whether the HARQ enhancement mode of the terminal is turned on. For example, binary bit 0 can indicate that the HARQ enhancement mode of the terminal is turned off, and binary bit 1 can indicate that the HARQ enhancement mode of the terminal is turned on, or binary bit 0 indicates that the HARQ enhancement mode of the terminal is turned on, and binary bit 1 indicates that the HARQ enhancement mode of the terminal is turned off, etc., without limitation.

[0136] It should be understood that when the second indication information is carried in the DCI, the DCI may be the DCI specified in the standard, or the DCI may be a new DCI. The new DCI may be understood as a new DCI whose format is different from the DCI specified in the standard. Specifically, the second indication information is carried in the DCI specified in the standard, or the second indication information is carried in the new DCI, as described below:

[0137] In one possible case, the second indication information carries a DCI specified in the standard, and the second indication information includes a binary bit. The satellite base station reuses a binary bit of the HARQ feedback resource field in the DCI specified in the standard to indicate whether the HARQ enhancement mode of the terminal is turned on. Specifically, the specific binary bit of the four binary bits of the HARQ feedback resource field in the DCI specified in the standard is reused to indicate whether the HARQ enhancement mode of the terminal is turned on. This can be configured by the satellite base station or agreed upon by the protocol, and is not limited here.

[0138] For example, the first binary bit of the HARQ feedback resource field in the DCI specified in the protocol multiplexing standard indicates whether the HARQ enhancement mode of the terminal is turned on. The first binary bit is binary bit 1, indicating that the HARQ enhancement mode of the terminal is turned on; the first binary bit is binary bit 0, indicating that the HARQ enhancement mode of the terminal is turned off.

[0139] In another possible case, the second indication information is carried in the new DCI, and the second indication information includes a binary bit. The satellite base station is configured, or the protocol stipulates that there is a binary bit in the new DCI for indicating whether the HARQ enhancement mode of the terminal is turned on.

[0140] For example, the new DCI means that on the basis of the DCI specified in the standard, there is a binary bit for indicating whether the HARQ enhancement mode of the terminal is turned on, and the binary bit is binary bit 1, indicating that the HARQ enhancement mode of the terminal is turned on; the binary bit is binary bit 0, indicating that the HARQ enhancement mode of the terminal is turned off. Alternatively, the binary bit is binary bit 1, indicating that the HARQ enhancement mode of the terminal is turned off; the binary bit is binary bit 0, indicating that the HARQ enhancement mode of the terminal is turned on, etc., without limitation.

[0141] It should be understood that S503 is an optional execution step. When executing step S503, the terminal determines the HARQ processing mode according to the instruction of the second indication information. When the second indication information indicates that the HARQ enhancement mode of the terminal is turned on, the HARQ processing mode of the terminal includes HARQ process turned on, HARQ process turned off but feedback of the decoding result of PDSCH; when the second indication information indicates that the HARQ enhancement mode of the terminal is turned off, the HARQ processing mode of the terminal includes HARQ process turned on, HARQ process turned off. Without executing step S503, the terminal determines the HARQ processing mode according to the steps specified in S504-S505, and further performs the HARQ processing operation corresponding to the HARQ processing mode.

[0142] S504: The terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI and the first indication information.

[0143] Specifically, the HARQ processing mode may include the HARQ process being turned on, or the HARQ process being turned off, or the HARQ process being turned off but the decoding result of the PDSCH being fed back. There are multiple combinations of the state of the HARQ feedback resource field in the first indication information and the DCI, and each combination indicates a HARQ processing mode of the terminal. Specifically, the terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI and the first indication information, which may include the following situations:

[0144] Case 1: When the first indication information indicates that the HARQ process is closed and the state of the HARQ feedback resource field in the DCI is the first state, the HARQ processing mode of the terminal is HARQ process closed.

[0145] For example, assuming that HARQ process 1 is included between the terminal and the satellite base station, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is closed, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "1000" state. At this time, the processing mode of HARQ process 1 is HARQ process closed.

[0146] Case 2: When the first indication information indicates that the HARQ process is closed and the state of the HARQ feedback resource field in the DCI is other than the first state, the HARQ processing mode is that the HARQ process is closed but the decoding result of the PDSCH is fed back.

[0147] It should be understood that the HARQ process is turned off but the decoding result of PDSCH is fed back, which can also be described as the HARQ process is turned off but the decoding result of PDSCH is fed back on the feedback resource, and the feedback resource is the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI.

[0148] For example, it is assumed that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is closed, HARQ process 2 is closed, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "0001" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "0011" state. At this time, the processing mode of HARQ process 1 is that the HARQ process is closed but the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0001" state, and the processing mode of HARQ process 2 is that the HARQ process is closed but the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0011" state.

[0149] Case 3: When the first indication information indicates that the HARQ process is turned on and the state of the HARQ feedback resource field in the DCI is the first state, the HARQ processing mode of the terminal is HARQ process turned off.

[0150] For example, assuming that HARQ process 1 is included between the terminal and the satellite base station, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is turned on, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "1000" state. At this time, the processing mode of HARQ process 1 is HARQ process off.

[0151] For example, assume that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is turned off, and HARQ process 2 is turned on, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "1000" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "1000" state. At this time, the processing mode of HARQ process 1 is HARQ process off, and the processing mode of HARQ process 2 is HARQ process off.

[0152] Case 4: When the first indication information indicates that the HARQ process is turned on and the state of the HARQ feedback resource field in the DCI is other than the first state, the HARQ processing mode is that the HARQ process is turned on.

[0153] For example, it is assumed that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is turned on, HARQ process 2 is turned on, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "0001" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "0011" state. At this time, the processing mode of HARQ process 1 is HARQ process turned on, and the processing mode of HARQ process 2 is HARQ process turned on.

[0154] For example, it is assumed that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the first state is the "1000" state, the first indication information indicates that HARQ process 1 is turned on, and HARQ process 2 is turned off, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "0001" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "0011" state. At this time, the processing mode of HARQ process 1 is HARQ process turned on, and the processing mode of HARQ process 2 is HARQ process turned off but the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0011" state.

[0155] It should be understood that in cases 1 to 4, the first state is any state of the HARQ feedback resource field in the DCI.

[0156] S505: The terminal performs a HARQ processing operation corresponding to the HARQ processing mode.

[0157] The terminal performing the HARQ processing operation corresponding to the HARQ processing mode may include:

[0158] When the HARQ processing mode of the terminal is that the HARQ process is turned on, the terminal receives the PDSCH scheduled by the DCI in S501, decodes the received PDSCH to obtain a decoding result, and feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. Subsequently, after receiving the PDSCH, the terminal blindly detects the scheduling of the next DCI (or PDCCH) after the delay between the PDSCH and the HARQ-ACK feedback, the time occupied by the HARQ-ACK feedback, the decoding duration, and the RTT.

[0159] RTT refers to the total delay from when the terminal feeds back the decoding result to when it receives the next DCI.

[0160] For example, assuming that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and HARQ process 2 is turned on, at this time, the terminal can receive PDSCH1 scheduled by DCI through HARQ process 2, and decode PDSCH1 to obtain the decoding result, and at the same time feedback the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in DCI. At this time, assuming that the time when the terminal receives PDSCH1 is T1, the delay between PDSCH and HARQ-ACK feedback is 1ms, the time occupied by HARQ-ACK feedback is 1ms, the decoding time is 12ms, and the RTT is 48ms, the terminal will blindly detect the scheduling of the next DCI after T1+62ms.

[0161] When the HARQ processing mode of the terminal is HARQ process off, the terminal receives the PDSCH scheduled by the DCI in S501, and decodes the received PDSCH to obtain a decoding result. Subsequently, after receiving the PDSCH, the terminal blindly detects the scheduling of the next DCI (or PDCCH) after the decoding time. It should be understood that the decoding time of different types of terminals is different. For example, the decoding time of a terminal with better processing performance is shorter, and the decoding time of a terminal with poor processing performance is longer.

[0162] For example, suppose there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and HARQ process 1 is turned off. At this time, the terminal can receive PDSCH2 scheduled by DCI through HARQ process 1, and decode PDSCH2 to obtain the decoding result. At this time, suppose the time when the terminal receives PDSCH2 is T2, and the decoding time is 12ms, the terminal will blindly detect the scheduling of the next DCI after T2+12ms.

[0163] When the HARQ processing mode of the terminal is that the HARQ process is closed but the decoding result of the PDSCH is fed back, the terminal receives the PDSCH scheduled by the DCI in S501, and decodes the received PDSCH to obtain the decoding result, and at the same time feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. Subsequently, after receiving the PDSCH, the terminal blindly detects the scheduling of the next DCI (or PDCCH) after the decoding time.

[0164] For example, suppose there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2. HARQ process 1 is closed but the decoding result of PDSCH is fed back on the feedback resource. At this time, the terminal can receive PDSCH1 scheduled by DCI through HARQ process 1, decode PDSCH1 to obtain the decoding result, and feed back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in DCI. At this time, assuming that the time when the terminal receives PDSCH1 is T3 and the decoding time is 12ms, the terminal will blindly detect the scheduling of the next DCI after T3+60ms.

[0165] It should be understood that different types of terminals have different decoding durations. For example, a terminal with better processing performance has a decoding duration of 12 ms, while a terminal with worse processing performance has a decoding duration of 10 ms.

[0166] It should be understood that the decoding duration of terminals in different modes includes but is not limited to the duration of decoding PDSCH. For example, the decoding duration of a terminal in full-duplex mode includes the duration of the terminal decoding PDSCH; the decoding duration of a terminal in half-duplex mode includes the duration of the terminal decoding PDSCH and the duration of the terminal switching uplink and downlink communication channels.

[0167] It should be understood that when the HARQ processing mode of a half-duplex terminal is HARQ process disabled but the decoding result of the PDSCH is fed back, the terminal blindly detects the scheduling of the PDCCH after the decoding time and the time of switching the uplink and downlink communication channels after receiving the PDSCH. It should be noted that the scheduling of the blind detection of the PDCCH should avoid the time when the half-duplex terminal feeds back the decoding result of the PDSCH.

[0168] S506: When the terminal feeds back the decoding result of the PDSCH to the satellite base station, the satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal.

[0169] Among them, when the HARQ processing mode of the terminal is HARQ process on, and when the HARQ process is off but the decoding result of PDSCH is fed back, the terminal feeds back the decoding result of PDSCH to the satellite base station on the feedback resource. The decoding result of PDSCH fed back by the terminal to the satellite base station includes ACK information or NACK information. ACK information is used to indicate that the decoding result of PDSCH of the terminal is decoding success; NACK information is used to indicate that the decoding result of PDSCH of the terminal is decoding failure.

[0170] The satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal, including: when the decoding result of the PDSCH fed back by the terminal to the satellite base station includes ACK information, the scheduling of the next data sent by the satellite base station to the terminal is the scheduling of new data. When the decoding result of the PDSCH fed back by the terminal to the satellite base station includes NACK information, the scheduling of the next data sent by the satellite base station to the terminal may be retransmission of the previous data or reduction of the order of the modulation and coding scheme (MCS). The previous data may be understood as the same data as the data carried by the previous PDSCH.

[0171] based on Figure 5 The method shown, when the first information includes the state of the HARQ feedback resource field in the DCI and the first indication information, flexibly indicates the HARQ processing mode of the terminal through multiple combinations of the first indication information and the state of the HARQ feedback resource field in the DCI. At the same time, multiple HARQ processing modes are designed, so that the HARQ processing mode is not limited to the two modes of HARQ process closure or HARQ process opening, and a HARQ processing mode in which the HARQ process is closed but the decoding result of the PDSCH is fed back is added, so that when the HARQ process is closed, the satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal, thereby avoiding the problem that the satellite base station cannot receive the feedback information of the terminal and cannot make link adaptive adjustment, resulting in resource waste. At the same time, when the terminal needs to feed back the decoding of the PDSCH to the satellite base station, the terminal can blindly detect the scheduling of the PDCCH in advance, thereby enhancing the throughput of the system.

[0172] In the following, the first communication device is a terminal, the access network device is a satellite base station, and the first information is RRC information. Figure 6 right Figure 4 The HARQ feedback method shown is introduced in detail.

[0173] Figure 6 A flow chart of a HARQ feedback method provided in an embodiment of the present application is as follows: Figure 6 As shown, the method may include:

[0174] S601: The satellite base station sends RRC information to the terminal. Correspondingly, the terminal receives the RRC information.

[0175] The RRC information is used to indicate the state of the HARQ process, and / or the RRC information is used to indicate the state of the HARQ process, and all HARQ processes are closed. The state of the HARQ process includes the HARQ process being turned on or the HARQ process being turned off. The RRC information includes bit information, and the bit information is used to indicate whether the HARQ process of the terminal performs HARQ feedback. Specifically, the description of the HARQ process being turned on and the HARQ process being turned off can be referred to the description in S501, which is not repeated here.

[0176] The bit information included in the RRC information may be a feedback bitmap Bitmap of the HARQ process, and the feedback bitmap Bitmap of the HARQ process includes at least one bit, and the at least one bit corresponds to at least one process, and one bit is used to indicate whether the process corresponding to the bit performs HARQ feedback. For example, binary bit 0 may indicate that the HARQ process is turned off, and binary bit 1 may indicate that the HARQ process is turned on, or binary bit 0 indicates that the HARQ process is turned on, and binary bit 1 indicates that the HARQ process is turned off, etc., without limitation.

[0177] For example, assuming that binary bit 0 indicates that the HARQ process is closed, and binary bit 1 indicates that the HARQ process is opened, the bit information included in the RRC information is the feedback bitmap Bitmap of the HARQ process, and the feedback bitmap Bitmap of the HARQ process is configured as

[0110] , indicating that the status of the first HARQ process is HARQ process closed, the status of the second HARQ process is HARQ process opened, the status of the third HARQ process is HARQ process opened, and the status of the fourth HARQ process is HARQ process closed.

[0178] It should be understood that, when the status of all HARQ processes is the same, the bit information included in the RRC information may be a binary bit, and the binary bit is used to indicate the status of all HARQ processes. For example, when the status of all HARQ processes is the same, the bit information included in the RRC information is a binary bit, and the binary bit 0 may indicate that the status of all HARQ processes is HARQ process off; the binary bit 1 may indicate that the status of all HARQ processes is HARQ process on, or the binary bit 1 may indicate that the status of all HARQ processes is HARQ process off; the binary bit 0 may indicate that the status of all HARQ processes is HARQ process on, etc., without limitation.

[0179] S602: The satellite base station sends second indication information to the terminal. Correspondingly, the terminal receives the second indication information.

[0180] Specifically, the operation of S602 is consistent with the operation of S503 and will not be described in detail here.

[0181] S603: The satellite base station sends DCI to the terminal. Correspondingly, the terminal receives the DCI.

[0182] The terminal receives DCI, which is used for the terminal to feed back the decoding result of the PDSCH on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. Specifically, the description of DCI can refer to the description in S501, which will not be repeated here.

[0183] S604: The terminal determines the HARQ processing mode based on the RRC information.

[0184] Specifically, the HARQ processing mode may include enabling the HARQ process, or disabling the HARQ process but feeding back the decoding result of the PDSCH.

[0185] Specifically, the terminal determines the HARQ processing mode based on the RRC information, including: the RRC information indicates that the HARQ process is turned on, and the terminal determines that the HARQ processing mode is the HARQ process turned on; the RRC information indicates that the HARQ process is turned off, and the terminal determines that the HARQ processing mode is the HARQ process turned off but feeds back the decoding result of the PDSCH.

[0186] For example, assuming that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the satellite base station sends a feedback bitmap Bitmap

[01] carrying the HARQ process to the terminal, binary bit 0 indicates that HARQ process 1 is closed, and the terminal determines that the HARQ processing mode is HARQ process closed but feeds back the decoding result of PDSCH; binary bit 1 indicates that HARQ process 2 is opened, and the terminal determines that the HARQ processing mode is HARQ process opened.

[0187] S605: The terminal performs a HARQ processing operation corresponding to the HARQ processing mode.

[0188] The terminal performing the HARQ processing operation corresponding to the HARQ processing mode may include:

[0189] When the HARQ processing mode of the terminal is that the HARQ process is turned on, the terminal receives the PDSCH scheduled by the DCI in S602, and decodes the received PDSCH to obtain a decoding result. At the same time, the decoding result is fed back to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field of the DCI in S602. Subsequently, after receiving the PDSCH, the terminal blindly detects the scheduling of the next DCI (or PDCCH) after the delay between the PDSCH and the HARQ-ACK feedback, the time occupied by the HARQ-ACK feedback, the decoding duration, and the RTT.

[0190] For example, there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2. The state of the HARQ feedback resource field of HARQ process 1 in the DCI received by the terminal is "1000", and the state of the HARQ feedback resource field of HARQ process 2 is "1001", and HARQ process 2 is turned on. The terminal can receive PDSCH1 scheduled by DCI through HARQ process 2, decode PDSCH1 to obtain the decoding result, and feed back the decoding result to the satellite base station on the feedback resource corresponding to the "1001" state. At this time, assuming that the time when the terminal receives PDSCH1 is T1, the delay between PDSCH and HARQ-ACK feedback is 1ms, the HARQ-ACK feedback takes 1ms, the decoding time is 12ms, and the RTT is 48ms, the terminal will blindly detect the scheduling of the next DCI after T1+62ms.

[0191] When the HARQ processing mode of the terminal is that the HARQ process is closed but the decoding result of the PDSCH is fed back, the terminal receives the PDSCH scheduled by the DCI in S602, and decodes the received PDSCH to obtain the decoding result. At the same time, the decoding result is fed back to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field of the DCI in S602. Subsequently, after receiving the PDSCH, the terminal blindly detects the scheduling of the next DCI (or PDCCH) after the decoding time.

[0192] For example, assume that there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2. The state of the HARQ feedback resource field of HARQ process 1 in the DCI received by the terminal is "0001", and the state of the HARQ feedback resource field of HARQ process 2 is "0011". HARQ process 1 is closed but the decoding result of PDSCH is fed back. The terminal can receive PDSCH1 scheduled by DCI through HARQ process 1, decode PDSCH1 to obtain the decoding result, and feed back the decoding result to the satellite base station on the feedback resource corresponding to the "0001" state. At this time, assuming that the time when the terminal receives PDSCH1 is T3 and the decoding time is 12ms, the terminal will blindly detect the scheduling of the next DCI after T3+60ms.

[0193] It should be understood that different types of terminals have different decoding durations. For example, a terminal with better processing performance has a decoding duration of 12 ms, while a terminal with worse processing performance has a decoding duration of 10 ms.

[0194] It should be understood that the decoding duration of terminals in different modes includes but is not limited to the duration of decoding PDSCH. For example, the decoding duration of a terminal in full-duplex mode includes the duration of the terminal decoding PDSCH; the decoding duration of a terminal in half-duplex mode includes the duration of the terminal decoding PDSCH and the duration of the terminal switching uplink and downlink communication channels.

[0195] S606: When the terminal feeds back the decoding result of the PDSCH to the satellite base station, the satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal.

[0196] The step of S606 is the same as the step of S506 , and the description of S506 may be referred to, and will not be repeated here.

[0197] based on Figure 6 In the method shown, when the first information is RRC information, the HARQ processing mode of the terminal is indirectly indicated through the state of the HARQ process carried by the RRC information, thereby reducing the signaling overhead of configuring the HARQ processing mode of the terminal. Figure 6 The overall beneficial effect of the method shown is the same as Figure 5 The beneficial effects of the methods shown are the same and will not be described again here.

[0198] In the following, the first communication device is a terminal, and the access network device is a satellite base station. The first information includes the state of the HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field corresponds to the HARQ processing mode of the terminal. Figure 7 For the above Figure 4 The HARQ feedback method shown is introduced in detail.

[0199] Figure 7 A flow chart of a HARQ feedback method provided in an embodiment of the present application is as follows: Figure 7 As shown, the method may include:

[0200] S701: The satellite base station sends an RRC signaling to the terminal. Correspondingly, the terminal receives the RRC signaling.

[0201] Among them, the RRC signaling is used to indicate to the terminal that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process. For example, the satellite base station first sends an RRC signaling (downlink HARQ-Feedback Disabled-DCI-NB signaling) to the terminal to indicate to the terminal that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process.

[0202] S702: The satellite base station sends second indication information to the terminal. Correspondingly, the terminal receives the second indication information.

[0203] Specifically, the operation of S702 is consistent with the operation of S503 and will not be described in detail here.

[0204] S703: The satellite base station sends DCI to the terminal. Correspondingly, the terminal receives the DCI.

[0205] For the description of DCI, reference may be made to the description of S501. The state of the HARQ feedback resource field in the DCI corresponds to the state of the HARQ process.

[0206] S704: The terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI.

[0207] Among them, the state of the HARQ feedback resource field in the DCI can be divided into a first state, a second state, and other states except the first state and the second state; the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back.

[0208] It should be understood that the first state and the second state may include at least one state of the HARQ feedback resource field in the DCI. For example, the first state includes two states of the HARQ feedback resource field in the DCI, namely, the "0001" state and the "0010" state; the second state includes four states of the HARQ feedback resource field in the DCI, namely, the "1111" state, the "1110" state, the "1100" state, and the "1000" state, without limitation.

[0209] It should be understood that other states except the first state and the second state may include states of fewer HARQ feedback resource fields in the DCI. For example, other states except the first state and the second state include states of a HARQ feedback resource field in a DCI, or other states except the first state and the second state include states of two HARQ feedback resource fields in the DCI, etc., without limitation. Because in the NTN scenario, the HARQ process needs to be closed to solve the problem of high communication delay between the terminal and the satellite base station, it is relatively rare for the HARQ processing mode of the terminal to be HARQ process turned on, and there is no need to reserve too many states of HARQ feedback resource fields in the DCI to indicate that the HARQ process of the terminal is turned on.

[0210] Specifically, the first state, the second state, and other states except the first state and the second state of the HARQ feedback resource field in the DCI correspond to the HARQ processing mode, and each state corresponds to the HARQ processing mode of a terminal. Specifically, the terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI, which may include the following situations:

[0211] Case 1: When the state of the HARQ feedback resource field in the DCI is the first state, the HARQ processing mode of the terminal is HARQ process off.

[0212] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, the first state includes the "0001" state and the "0010" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is "0001". At this time, the HARQ processing mode is HARQ process off.

[0213] Case 2: When the state of the HARQ feedback resource field in the DCI is the second state, the HARQ processing mode of the terminal is that the HARQ process is turned off, but the decoding result of the PDSCH is fed back. It should be understood that the HARQ process is turned off but the decoding result of the PDSCH is fed back, which can also be described as the HARQ process is turned off but the decoding result of the PDSCH is fed back on the feedback resource, and the feedback resource is the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI.

[0214] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, the second state includes the "1111" state and the "1110" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the state of the HARQ feedback resource field of the HARQ process 1 in the DCI is the "1111" state, and the state of the HARQ feedback resource field of the HARQ process 2 in the DCI is the "1110" state. At this time, the HARQ processing mode of the HARQ process 1 is the HARQ process off, but the decoding result of the PDSCH is fed back on the feedback resource corresponding to the "1111" state; the HARQ processing mode of the HARQ process 2 is the HARQ process off, but the decoding result of the PDSCH is fed back on the feedback resource corresponding to the "1110" state.

[0215] Case 3: When the state of the HARQ feedback resource field in the DCI is other than the first state and the second state, the processing mode of the terminal is HARQ process on.

[0216] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, other states except the first state and the second state include the "0000" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is "0000". At this time, the HARQ processing mode of HARQ process 1 is HARQ process on, and the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0000" state.

[0217] It should be understood that each state of the HARQ feedback resource field in the DCI corresponds to the HARQ processing mode of the indicated terminal, which can be configured by the satellite base station, or agreed upon by the protocol. In the case where the HARQ processing mode of the terminal indicated by each state of the HARQ feedback resource field in the DCI is configured by the satellite base station, the satellite base station can modify, through RRC configuration information, the HARQ processing mode of the terminal indicated by each state of the HARQ feedback resource field in the DCI. For example, the satellite base station configures the "0001 state" of the HARQ feedback resource field in the DCI to correspond to the HARQ processing mode of the indicated terminal as HARQ process closed, and then the satellite base station modifies the HARQ processing mode of the terminal indicated by the "0001" state to HARQ process closed, but feedback the decoding result of PDSCH through RRC configuration information.

[0218] S705: The terminal performs a HARQ processing operation corresponding to the HARQ processing mode.

[0219] The terminal performing the HARQ processing operation corresponding to the HARQ processing mode may include:

[0220] When the HARQ processing mode of the terminal is that the HARQ process of the terminal is closed, the terminal receives the PDSCH scheduled by the DCI in S702, and decodes the received PDSCH to obtain a decoding result. The specific situation of the HARQ process of the terminal being closed in S704 can refer to the situation of the HARQ process of the terminal being closed in S504, which will not be repeated here.

[0221] In the case where the HARQ processing mode of the terminal is that the HARQ process is closed, but the decoding result of the PDSCH is fed back, the terminal receives the PDSCH scheduled by the DCI in S702, and decodes the received PDSCH to obtain the decoding result, and at the same time feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The case where the HARQ process of the terminal is closed in S704, but the decoding result of the PDSCH is fed back, can be specifically referred to the case where the HARQ process of the terminal is closed in S504, but the decoding result of the PDSCH is fed back, which will not be repeated here.

[0222] When the HARQ processing mode of the terminal is HARQ process enabled, the terminal receives the PDSCH scheduled by the DCI in S702, decodes the received PDSCH to obtain a decoding result, and feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The specific situation of the HARQ process enabled of the terminal in S704 can be referred to the situation of the HARQ process enabled of the terminal in S504, which will not be described in detail here.

[0223] S706: When the terminal feeds back the decoding result of the PDSCH to the satellite base station, the satellite base station determines the scheduling information of the next data according to the decoding result of the PDSCH fed back by the terminal.

[0224] The step of S706 is the same as the step of S506, and the description of S506 may be referred to, which will not be repeated here.

[0225] based on Figure 7 In the method shown, when the first information includes the state of the HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field corresponds to the HARQ processing mode of the terminal, the terminal can directly determine the HARQ processing mode according to the indication corresponding to the state of the HARQ feedback resource field. At the same time, since the state of the HARQ feedback resource field corresponds to the indicated HARQ processing mode, it can be configured by the satellite base station or can be agreed upon by the protocol, so that the manner in which the state of the HARQ feedback resource field corresponds to the indicated HARQ processing mode has diversity and flexibility. Furthermore, the HARQ processing mode indicated by the state of the HARQ feedback resource field can be changed by changing the satellite base station configuration or by modifying the protocol agreement. Based on Figure 7 The overall beneficial effect of the method shown is the same as Figure 5 The beneficial effects of the methods shown are the same and will not be described again here.

[0226] In the following, the first communication device is a terminal, and the access network device is a satellite base station. The first information includes the state of the HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field corresponds to the HARQ processing mode of the terminal. Figure 8 For the above Figure 4 The HARQ feedback method shown is introduced in detail.

[0227] Figure 8 A flow chart of a HARQ feedback method provided in an embodiment of the present application is as follows: Figure 8 As shown, the method may include:

[0228] Steps S801 to S803 are the same as steps S701 to S703 and will not be described in detail here.

[0229] S804: The satellite base station determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI.

[0230] Among them, the state of the HARQ feedback resource field in the DCI can be divided into a first state, a second state, and other states except the first state and the second state; the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back.

[0231] Specifically, the first state can be configured by the satellite base station according to the balance of resources, including at least one state of the HARQ feedback resource field in the DCI. For example, the satellite base station configures different first states for different terminals according to the traffic volume of different terminals. Exemplarily, the traffic volume of terminal 1 is to access 5 services, and the traffic volume of terminal 2 is to access 10 services. The first state configured by the satellite base station for terminal 1 includes the "0001" state of the HARQ feedback resource field in the DCI, and the first state configured for terminal 2 includes the "0011" state of the HARQ feedback resource field in the DCI.

[0232] One possible situation is that the satellite base station configures the same first state for terminals in the same cell (which can be understood as the range covered by the satellite base station signal). For example, the satellite base station configures the first state of terminal 1 and terminal 2 in cell 1 to be "1111".

[0233] Specifically, the second state may be configured by the satellite base station or agreed upon by the protocol, and includes at least one state of the HARQ feedback resource field in the DCI. For example, the satellite base station configures the second state to include the "1000" state and / or the "1100" state of the HARQ feedback resource field in the DCI. Alternatively, the protocol agrees that the second state includes the "1000" state and / or the "1100" state of the HARQ feedback resource field in the DCI.

[0234] It should be understood that when the first state and the second state are configured successfully, other states except the first state and the second state may not be configured separately. For example, the satellite base station configures the first state including the "0010" state, "0011" state, "0100" state, "0101" state, "0110" state, "0111" state, "1000" state, "1001" state, "1010" state, "1011" state, and "1100" state of the HARQ feedback resource field in the DCI according to the resource balance; the satellite base station configures the second state including the "1101" state, "1110" state, and "1111" state of the HARQ feedback resource field in the DCI; then other states except the first state and the second state include the "0000" state and the "0001" state.

[0235] Specifically, the first state, the second state, and other states except the first state and the second state of the HARQ feedback resource field in the DCI correspond to the HARQ processing mode, and each state corresponds to the HARQ processing mode of a terminal. Specifically, the terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI, which may include the following situations:

[0236] Case 1: When the state of the HARQ feedback resource field in the DCI is the first state, the HARQ processing mode of the terminal is that the HARQ process is turned off, but the decoding result of the PDSCH is fed back. It should be understood that the HARQ process is turned off but the decoding result of the PDSCH is fed back, which can also be described as the HARQ process is turned off but the decoding result of the PDSCH is fed back on the feedback resource, and the feedback resource is the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI.

[0237] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, the first state includes the "0010" state and the "0011" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, the state of the HARQ feedback resource field of the HARQ process 1 in the DCI is the "0010" state, and the state of the HARQ feedback resource field of the HARQ process 2 in the DCI is the "0011" state. At this time, the HARQ processing mode of the HARQ process 1 is the HARQ process off, but the decoding result of the PDSCH is fed back on the feedback resource corresponding to the "0010" state; the HARQ processing mode of the HARQ process 2 is the HARQ process off, but the decoding result of the PDSCH is fed back on the feedback resource corresponding to the "0011" state.

[0238] Case 2: When the state of the HARQ feedback resource field in the DCI is the second state, the HARQ processing mode of the terminal is HARQ process off.

[0239] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, the second state includes the "1001" state and the "1000" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is "1000". At this time, the HARQ processing mode is HARQ process off.

[0240] Case 3: When the state of the HARQ feedback resource field in the DCI is other than the first state and the second state, the processing mode of the terminal is HARQ process on.

[0241] For example, assuming that the RRC signaling received by the terminal indicates that the configuration of the HARQ feedback resource field in the DCI can indicate the state of the HARQ process, other states except the first state and the second state include the "0000" state of the HARQ feedback resource field in the DCI, and there are two HARQ processes between the terminal and the satellite base station: HARQ process 1 and HARQ process 2, and the state of the HARQ feedback resource field of HARQ process 1 in the DCI is "0000". At this time, the HARQ processing mode of HARQ process 1 is HARQ process on, and the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0000" state.

[0242] S805: The terminal performs a HARQ processing operation corresponding to the HARQ processing mode.

[0243] The terminal performing the HARQ processing operation corresponding to the HARQ processing mode may include:

[0244] When the HARQ processing mode of the terminal is that the HARQ process of the terminal is closed, the terminal receives the PDSCH scheduled by the DCI in S802 and decodes the received PDSCH to obtain a decoding result. The specific situation of the HARQ process of the terminal being closed in S804 can refer to the situation of the HARQ process of the terminal being closed in S504, which will not be repeated here.

[0245] In the case where the HARQ processing mode of the terminal is that the HARQ process is closed, but the decoding result of the PDSCH is fed back, the terminal receives the PDSCH scheduled by the DCI in S802, and decodes the received PDSCH to obtain the decoding result, and at the same time feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The case where the HARQ process of the terminal is closed in S804, but the decoding result of the PDSCH is fed back, can be specifically referred to the case where the HARQ process of the terminal is closed in S504, but the decoding result of the PDSCH is fed back, which will not be repeated here.

[0246] When the HARQ processing mode of the terminal is HARQ process enabled, the terminal receives the PDSCH scheduled by the DCI in S802, decodes the received PDSCH to obtain a decoding result, and feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The specific situation of the HARQ process enabled of the terminal in S804 can refer to the situation of the HARQ process enabled of the terminal in S504, which will not be repeated here.

[0247] S806: When the terminal feeds back the decoding result of the PDSCH to the satellite base station, the satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal.

[0248] The step of S806 is the same as the step of S506, and the description of S506 may be referred to, which will not be repeated here.

[0249] based on Figure 8 In the method shown, when the first information includes the state of the HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field corresponds to the HARQ processing mode of the terminal, the terminal can directly determine the HARQ processing mode according to the indication corresponding to the state of the HARQ feedback resource field. Furthermore, the first state can be configured for the terminal by the satellite base station according to the balance of resources; the second state can be configured by the satellite base station or agreed upon by the protocol, so that the application scenario of the method is more flexible. For example, the first state is configured for terminal 1 according to the balance of network resources of the terminal, and the first state configured for terminal 2 includes the "1100" state of the HARQ feedback resource field in the DCI. Alternatively, the first state is configured for the terminal in cell 1 according to the number of service terminals in the entire network, and the first state includes the "1000" state of the HARQ feedback resource field in the DCI, etc. Based on Figure 8 The overall beneficial effect of the method shown is the same as Figure 5 The beneficial effects of the methods shown are the same and will not be described again here.

[0250] In the following, the first communication device is a terminal and the access network device is a satellite base station. The first information includes the state of the HARQ feedback resource field in the DCI. The state of the HARQ feedback resource field is used to indicate the HARQ processing mode of the terminal in combination with whether the terminal turns on the HARQ enhancement mode. Fig. 9 For the above Figure 4 The HARQ feedback method shown is introduced in detail.

[0251] Fig. 9 A flow chart of a HARQ feedback method provided in an embodiment of the present application is as follows: Fig. 9 As shown, the method may include:

[0252] S901: The satellite base station sends second indication information to the terminal. Correspondingly, the terminal receives the second indication information.

[0253] The second indication information is used to indicate whether the HARQ enhancement mode of the terminal is turned on. The second indication information can be carried in the RRC signaling sent by the satellite base station to the terminal, and / or carried in the DCI sent by the satellite base station to the terminal, and / or, as determined by the protocol, etc., for specific circumstances, please refer to S503.

[0254] S902: The satellite base station sends DCI to the terminal. Correspondingly, the terminal receives the DCI.

[0255] Among them, DCI can be used to schedule PDSCH, and DCI can include a HARQ feedback resource field. The HARQ feedback resource field has at least one state, and one state corresponds to one feedback resource. For example, the HARQ feedback resource field may include 4 bits, corresponding to 16 values, that is, 16 states. One possible situation is that the HARQ feedback resource field in the DCI is the HARQ-ACK resource field specified in the standard. Another possible situation is that the HARQ feedback resource field in the DCI is the HARQ feedback resource field specified in the new DCI format. For example, the new DCI format adds a HARQ feedback resource field on the basis of the standard DCI format.

[0256] Optionally, the DCI is carried on the PDCCH and sent to the terminal. The satellite base station sending the DCI to the terminal can be replaced by describing that the satellite base station sends the PDCCH to the terminal, and the PDCCH carries the DCI.

[0257] Specifically, the state of the HARQ feedback resource field in the DCI includes a first state and other states except the first state. The first state includes at least one state of the HARQ feedback resource field in the DCI, which can be configured by the satellite base station or agreed upon by the protocol. For example, the first state of the HARQ feedback resource field in the DCI configured by the satellite base station includes the "1000" state and the "1001" state. Therefore, the states of the HARQ feedback resource field in the DCI except the first state include the remaining states except the "1000" state and the "1001" state. Alternatively, the protocol stipulates that the first state of the HARQ feedback resource field in the DCI includes the "1000" state and the "1001" state.

[0258] S903: The terminal determines the HARQ processing mode based on the second indication information and the state of the HARQ feedback resource field in the DCI.

[0259] Specifically, the HARQ processing mode may include the HARQ process being turned on, or the HARQ process being turned off, or the HARQ process being turned off but the decoding result of the PDSCH being fed back. There are multiple combinations of the state of the HARQ feedback resource field in the second indication information and the DCI, and each combination indicates a HARQ processing mode of the terminal. Specifically, the terminal determines the HARQ processing mode based on the state of the HARQ feedback resource field in the received DCI and the second indication information, which may include the following situations:

[0260] Case 1: When the second indication information indicates that the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is the first state, the HARQ processing mode of the terminal is HARQ process turned off, but the decoding result of the PDSCH is fed back.

[0261] For example, assuming that the terminal and the satellite base station include HARQ process 1 and HARQ process 2, the first state includes the "1111" state and the "1110" state, the second indication information indicates that the HARQ enhancement mode is turned on, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "1111" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "1110" state. At this time, the processing mode of HARQ process 1 is HARQ process off, but the decoding result of PDSCH is fed back on the feedback resource corresponding to the "1111" state; the processing mode of HARQ process 2 is HARQ process off, but the decoding result of PDSCH is fed back on the feedback resource corresponding to the "1110" state.

[0262] Case 2: When the second indication information indicates that the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is other than the first state, the HARQ processing mode of the terminal is HARQ process turned on.

[0263] For example, assuming that the terminal and the satellite base station include HARQ process 1 and HARQ process 2, the first state includes the "1111" state and the "1110" state, the second indication information indicates that the HARQ enhancement mode is turned on, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "0000" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "0001" state. At this time, the processing mode of HARQ process 1 is HARQ process turned on, and the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0000" state; the processing mode of HARQ process 2 is HARQ process turned on, and the decoding result of PDSCH is fed back on the feedback resource corresponding to the "0001" state.

[0264] Case three: when the second indication information indicates that the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is the first state, the HARQ processing mode of the terminal is HARQ process turned off.

[0265] For example, assuming that the terminal and the satellite base station include HARQ process 1 and HARQ process 2, the first state includes the "1000" state and the "1001" state, the second indication information indicates that the HARQ enhancement mode is turned off, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "1000" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "1001" state. At this time, the processing mode of HARQ process 1 is HARQ process off, and the processing mode of HARQ process 2 is HARQ process off.

[0266] Case 4: when the second indication information indicates that the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is other than the first state, the HARQ processing mode of the terminal is HARQ process turned on.

[0267] For example, assuming that the terminal and the satellite base station include HARQ process 1 and HARQ process 2, the first state includes the "1000" state and the "1001" state, the second indication information indicates that the HARQ enhancement mode is turned off, the state of the HARQ feedback resource field of HARQ process 1 in the DCI is the "0000" state, and the state of the HARQ feedback resource field of HARQ process 2 in the DCI is the "0001" state. At this time, the processing mode of HARQ process 1 is HARQ process on, and the processing mode of HARQ process 2 is HARQ process on.

[0268] S904: The terminal performs a HARQ processing operation corresponding to the HARQ processing mode.

[0269] The terminal performing the HARQ processing operation corresponding to the HARQ processing mode may include:

[0270] When the HARQ processing mode of the terminal is that the HARQ process of the terminal is closed, the terminal receives the PDSCH scheduled by the DCI and decodes the received PDSCH to obtain a decoding result. The situation of the HARQ process of the terminal being closed in S904 can be specifically referred to the situation of the HARQ process of the terminal being closed in S504, which will not be repeated here.

[0271] When the HARQ processing mode of the terminal is that the HARQ process is closed, but the decoding result of the PDSCH is fed back, the terminal receives the PDSCH scheduled by the DCI, decodes the received PDSCH to obtain the decoding result, and feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The specific situation of the terminal's HARQ process being closed but the decoding result of the PDSCH being fed back in S904 can be specifically referred to the situation of the terminal's HARQ process being closed but the decoding result of the PDSCH being fed back in S504, which will not be repeated here.

[0272] When the HARQ processing mode of the terminal is HARQ process enabled, the terminal receives the PDSCH scheduled by the DCI, decodes the received PDSCH to obtain a decoding result, and feeds back the decoding result to the satellite base station on the feedback resource corresponding to the state of the HARQ feedback resource field in the DCI. The specific situation of the HARQ process enabled of the terminal in S904 can refer to the situation of the HARQ process enabled of the terminal in S504, which will not be repeated here.

[0273] S905: When the terminal feeds back the decoding result of the PDSCH to the satellite base station, the satellite base station determines the scheduling of the next data according to the decoding result of the PDSCH fed back by the terminal.

[0274] The step of S905 is the same as the step of S506, and the description of S506 may be referred to, which will not be repeated here.

[0275] based on Fig. 9 In the method shown, the first information includes the state of the HARQ feedback resource field in the DCI, and the state of the HARQ feedback resource field is divided into a first state and other states except the first state. The second indication information can directly indicate whether the HARQ enhancement mode of the terminal is turned on. Furthermore, a situation where there are multiple combinations of the state of the HARQ feedback resource field in the second indication information and the DCI is given, and each combination indicates a HARQ processing mode of the terminal, which flexibly and diversely indicates the HARQ processing mode of the terminal, so that the subsequent terminal can perform the HARQ processing operation corresponding to the HARQ processing mode. Based on Fig. 9The overall beneficial effect of the method shown is the same as Figure 5 The beneficial effects of the methods shown are the same and will not be described again here.

[0276] The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of interaction between each node. It is understandable that each node, such as a first communication device (e.g., a terminal), an access network device (e.g., a satellite base station), etc., in order to realize the above functions, includes a hardware structure and / or software module corresponding to each function. It should be easily appreciated by those skilled in the art that, in conjunction with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0277] The embodiment of the present application can group the functional modules of the first communication device, access network equipment, etc. according to the above method example. For example, each functional module can be grouped according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the grouping of modules in the embodiment of the present application is schematic and is only a logical functional grouping. There may be other grouping methods in actual implementation.

[0278] Fig.10 The structure diagram of a communication device 100 is shown. The communication device 100 may be a first communication device, or a chip in the first communication device, or a system on a chip. The communication device 100 may be used to perform the functions of the first communication device involved in the above embodiment. As an implementable manner, Fig.10 The communication device 100 shown includes: a transceiver unit 1001, a processing unit 1002;

[0279] The transceiver unit 1001 is used to obtain first information; wherein the first information indicates a HARQ processing mode of the first communication device; the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the PDSCH is fed back; for example, the transceiver unit 1001 can be used to support the communication device 100 to execute S501-S502, or S601, or S703, or S803, or S901-S902.

[0280] The processing unit 1002 is configured to perform a HARQ processing operation corresponding to the HARQ processing mode based on the first information. For example, the processing unit 1002 can support the communication device 100 to perform S504-S505, or S604-S605, or S704-S705, or S804-S805, or S903-S904.

[0281] Among them, the first information, HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of PDSCH is fed back, and the relevant description of the HARQ processing operation corresponding to the HARQ processing mode can be referred to the description in the above method embodiment.

[0282] Specifically, the above Figures 5 to 9 All relevant contents of each step involved in the illustrated method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here. The communication device 100 is used to execute Figures 5 to 9 The function of the first communication device in the communication method shown in the method can therefore achieve the same effect as the above communication method.

[0283] As another possible way to achieve this, Fig.10 The communication device 100 shown includes: a processing module and a communication module. The processing module is used to control and manage the actions of the communication device 100. For example, the processing module can integrate the function of the processing unit 1002, and can be used to support the communication device 100 to execute S504-S505, or S604-S605, or S704-S705, or S804-S805, or S903-S904 and other processes of the technology described in this document. The communication module can integrate the function of the communication unit 1001, and can be used to support the communication device 100 to execute S501-S502, or S601, or S703, or S803, or S901-S902 and communicate with other network entities, such as with Figure 8 The communication device 100 may also include a storage module for storing program codes and data of the communication device 100.

[0284] The processing module may be a processor or a controller. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the contents disclosed in this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc. The communication module may be a transceiver circuit or a communication interface, etc. The storage module may be a memory. When the processing module is a processor, the communication module is a communication interface, and the storage module is a memory, the communication device 100 involved in the embodiment of the present application may be Fig.11For example, the first communication device mentioned above may be used Fig.11 The structure shown or includes Fig.11 Parts shown. Fig.11 A schematic diagram of the composition of a communication device 110 provided in an embodiment of the present application is shown as follows: Fig.11 As shown, the communication device 110 may include a processor 1101 , a communication line 1102 , and a communication interface 1103 .

[0285] Furthermore, the communication device 110 may also include a memory 1104 . The processor 1101 , the memory 1104 and the communication interface 1103 may be connected via a communication line 1102 .

[0286] The processor 1101 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 1101 may also be other communication devices with processing functions, such as circuits, devices, or software modules.

[0287] The communication line 1102 is used to transmit information between the components included in the communication device 110 .

[0288] The communication interface 1103 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, a radio access network (RAN), a wireless local area network (WLAN), etc. The communication interface 1103 may be a radio frequency module, a transceiver, or any communication device capable of achieving communication. The embodiment of the present application is described by taking the communication interface 1103 as a radio frequency module as an example, wherein the radio frequency module may include an antenna, a radio frequency circuit, etc., and the radio frequency circuit may include a radio frequency integrated chip, a power amplifier, etc.

[0289] The memory 1104 is used to store instructions, where the instructions may be computer programs.

[0290] Among them, the memory 1104 can be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage, magnetic disk storage media or other magnetic storage devices, and optical disc storage includes compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.

[0291] It should be noted that the memory 1104 can exist independently of the processor 1101, or can be integrated with the processor 1101. The memory 1104 can be used to store instructions or program codes or some data, etc. The memory 1104 can be located in the communication device 110, or can be located outside the communication device 110, without limitation. The processor 1101 is used to execute the instructions stored in the memory 1104 to implement the communication method provided in the following embodiments of the present application.

[0292] In one example, the processor 1101 may include one or more CPUs, such as Fig.11 CPU0 and CPU1 in.

[0293] As an optional implementation, the communication device 110 includes multiple processors, for example, Fig.11 In addition to the processor 1101, a processor 1107 may also be included.

[0294] As an optional implementation, the communication device 110 further includes an output device 1105 and an input device 1106. The input device 1106 is a keyboard, a mouse, a microphone or a joystick, etc., and the output device 1105 is a display screen, a speaker, etc.

[0295] It should be noted that the communication device 110 can be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a Fig.11 In addition, Fig.11 The structure shown in the figure does not constitute a limitation on the communication device, except Fig.11 In addition to the components shown, the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0296] In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0297] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be a terminal of any of the above embodiments, such as: an internal storage unit including a data transmission end and / or a data receiving end, such as a hard disk or memory of a terminal. The above computer-readable storage medium can also be an external storage device of the above terminal, such as a plug-in hard disk, a smart memory card (smart media card, SMC), a secure digital (securedigital, SD) card, a flash card (flash card), etc. equipped on the above terminal. Further, the above computer-readable storage medium can also include both the internal storage unit of the above terminal and an external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above terminal. The above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0298] It should be understood that the collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in the technical solution of this application are in compliance with relevant laws and regulations and do not violate public order and good morals. For example, in the technical solution of this application, the processing of user personal information is carried out with the authorization of the user, and the same description is not repeated here.

[0299] It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0300] It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0301] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A. For example, B can be determined based on A. It should also be understood that determining B based on A does not mean determining B only based on A, but B can also be determined based on A and / or other information. In addition, the "connection" that appears in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitation on this.

[0302] Unless otherwise specified, the "transmission" (transmit / transmission) appearing in the embodiments of the present application refers to bidirectional transmission, including sending and / or receiving actions. Specifically, the "transmission" in the embodiments of the present application includes the sending of data, the receiving of data, or the sending of data and the receiving of data. In other words, the data transmission here includes uplink and / or downlink data transmission. Data may include channels and / or signals, uplink data transmission is uplink channel and / or uplink signal transmission, and downlink data transmission is downlink channel and / or downlink signal transmission. The "network" and "system" appearing in the embodiments of the present application express the same concept, and the communication system is the communication network.

[0303] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the grouping of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be grouped into different functional modules to complete all or part of the functions described above.

[0304] In the several embodiments provided in the present application, it should be understood that the disclosed communication devices and methods can be implemented in other ways. For example, the communication device embodiments described above are only schematic. For example, the grouping of the modules or units is only a logical function grouping. There may be other grouping methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0305] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0306] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0307] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device, such as a single-chip microcomputer, a chip, etc., or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media for storing program codes such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0308] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A hybrid automatic repeat request HARQ feedback method, characterized in that: The method comprises: The first communication device acquires first information, where the first information indicates a HARQ processing mode of the first communication device; the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but a decoding result of a physical downlink shared channel PDSCH is fed back; The first communication device performs a HARQ processing operation corresponding to the HARQ processing mode based on the first information.

2. The method according to claim 1, characterized in that: The first information includes a state of a HARQ feedback resource field in the DCI, and first indication information, where the first indication information is used to indicate a state of a HARQ process, where the state of the HARQ process includes HARQ process shutdown or HARQ process startup.

3. The method according to claim 2, characterized in that The first information indicates a HARQ processing mode of the first communication device, including: When the first indication information indicates that the HARQ process is closed and the state of the HARQ feedback resource field is the first state, the first information indicates that the HARQ process of the first communication device is closed; Alternatively, when the first indication information indicates that the HARQ process is turned off and the state of the HARQ feedback resource field is other than the first state, the first information indicates that the HARQ process of the first communication device is turned off, but the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

4. The method according to claim 2, characterized in that: The first information indicates a HARQ processing mode of the first communication device, including: When the first indication information indicates that the HARQ process is turned on and the state of the HARQ feedback resource field is the first state, the first information indicates that the HARQ process of the first communication device is turned off and no decoding result of the PDSCH is fed back; Alternatively, when the first indication information indicates that the HARQ process is started and the state of the HARQ feedback resource field is other than the first state, the first information indicates that the HARQ process of the first communication device is started, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

5. The method according to claim 1, characterized in that: The first information is radio resource control RRC information; The RRC information indicates the state of the HARQ process; and / or, The RRC information indicates the status of the HARQ process, and all HARQ processes are closed; The state of the HARQ process includes whether the HARQ process is turned on or off, and the RRC information includes bit information, and the bit information is used to indicate whether the HARQ process of the first communication device performs HARQ feedback.

6. The method according to claim 5, characterized in that: When the RRC information indicates that the HARQ process is turned on, the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field; when the RRC information indicates that the HARQ process is turned off, the HARQ process of the first communication device is turned off, but the decoding result of the PDSCH is fed back on the feedback resources indicated by the HARQ feedback resource field.

7. The method according to claim 1, characterized in that: The first information includes a state of a HARQ feedback resource field in the DCI; The state of the HARQ feedback resource field corresponds to an indication of a HARQ processing mode of the first communication device.

8. The method according to claim 7, characterized in that: The state of the HARQ feedback resource field corresponds to indicating a HARQ processing mode of the first communication device, including: When the state of the HARQ feedback resource field is the first state, instructing the HARQ process of the first communication device to be closed, and the first communication device does not feed back a decoding result of the PDSCH; When the state of the HARQ feedback resource field is the second state, instruct the first communication device to close the HARQ process, but feed back the decoding result of the PDSCH on the feedback resource indicated by the HARQ feedback resource field; When the state of the HARQ feedback resource field is other than the first state and the second state, the HARQ process of the first communication device is indicated to be started, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

9. The method according to claim 7, characterized in that: The state of the HARQ feedback resource field corresponds to indicating a HARQ processing mode of the first communication device, including: When the state of the HARQ feedback resource field is the first state, instruct the HARQ process of the first communication device to be closed, but feedback the decoding result of the PDSCH on the feedback resource indicated by the HARQ feedback resource field; When the state of the HARQ feedback resource field is the second state, instructing the HARQ process of the first communication device to be closed, and the first communication device does not feed back a decoding result of the PDSCH; When the state of the HARQ feedback resource field is other than the first state and the second state, the HARQ process of the first communication device is indicated to be started, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

10. The method according to any one of claims 7 to 9, characterized in that: The indication meaning corresponding to the state of the HARQ feedback resource field is configured by the satellite access network device; The indication meaning corresponding to the state of the HARQ feedback resource field is agreed upon by the protocol.

11. The method according to claim 8 or 9, characterized in that: The first state is configured by the satellite access network device according to the balance of resources; The second state is configured by satellite access network equipment or agreed upon by protocol.

12. The method according to claim 1, characterized in that: The first information includes a state of a HARQ feedback resource field in the DCI; The state of the HARQ feedback resource field is used to indicate the HARQ processing mode of the first communication device in combination with whether the first communication device turns on the HARQ enhancement mode.

13. The method according to claim 12, characterized in that When the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is the first state, instructing the HARQ process of the first communication device to be turned off, but feeding back the decoding result of the PDSCH on the feedback resource indicated by the HARQ feedback resource field; When the HARQ enhancement mode is turned on and the state of the HARQ feedback resource field is other than the first state, it indicates that the HARQ process of the first communication device is turned on, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

14. The method according to claim 12, characterized in that: When the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is the first state, instructing the HARQ process of the first communication device to be turned off and not to feed back the decoding result of the PDSCH; When the HARQ enhancement mode is turned off and the state of the HARQ feedback resource field is other than the first state, the HARQ process of the first communication device is indicated to be turned on, and the decoding result of the PDSCH is fed back on the feedback resource indicated by the HARQ feedback resource field.

15. The method according to any one of claims 1 to 14, characterized in that: The method further comprises: Receiving second indication information indicating whether the first communication device turns on the HARQ enhancement mode; The second indication information is carried in RRC signaling from a satellite access network device; and / or, The second indication information is carried in the DCI from the satellite access network device; and / or, The second indication information is agreed upon by the protocol.

16. The method according to claim 1, characterized in that: The first communication device performs a HARQ processing operation corresponding to the HARQ processing mode based on the first information, including: When the HARQ process is turned on, the first communication device blindly detects the scheduling of the PDCCH after a first time period after receiving the PDSCH, where the first time period includes: a delay between the PDSCH and the HARQ-ACK feedback, a time occupied by the HARQ-ACK feedback, a decoding time of the first communication device, and a round-trip transmission time between the first communication device and the satellite access network device; When the HARQ process is turned off, the first communication device blindly detects the scheduling of the PDCCH after a second time period after receiving the PDSCH, and the second time period includes: a decoding time period of the first communication device; When the HARQ process is closed but the decoding result of the physical downlink shared channel PDSCH is fed back, the first communication device blindly detects the scheduling of the PDCCH after a second time period after receiving the PDSCH, and the second time period includes the decoding time period of the first communication device.

17. A communication device, characterized in that: The communication device is applied to a first communication device, and the communication device includes: A transceiver unit, configured to obtain first information; the first information indicates a HARQ processing mode of the first communication device; the HARQ processing mode includes: the HARQ process is turned on, or the HARQ process is turned off, or the HARQ process is turned off but the decoding result of the physical downlink shared channel PDSCH is fed back; A processing unit is used to perform a HARQ processing operation corresponding to the HARQ processing mode based on the first information.

18. A communication device, characterized in that: The communication device includes a processor and a communication interface, and the processor and the communication interface are used to support the communication device to execute the HAQR feedback method according to any one of claims 1-16.

19. A communication system, characterized in that: The communication system comprises the communication device according to claim 17 or claim 18.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 16.

21. A computer program product, characterized in that The computer program product comprises computer instructions, and when the computer instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 16.

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