Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. In the communication method, first data sent by a sending end on a first time-frequency resource is transmitted by means of N transport streams, wherein the first data comprises first retransmission data and first initial transmission data, the first retransmission data is data of a retransmitted first data block, the first initial transmission data is data of an initially transmitted second data block, the first retransmission data is transmitted by means of M transport streams among the N transport streams, and the first initial transmission data is transmitted by means of transport streams, other than the M transport streams, among the N transport streams. The method can improve the data transmission efficiency.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202510494986.0, filed on April 18, 2025, entitled "Communication Method and Communication Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more particularly to a communication method and a communication device. Background Technology

[0003] In wireless communication systems, the reliability of communication can be improved through hybrid automatic repeat request (HARQ) feedback technology. The basic idea of ​​HARQ is: if the terminal successfully receives data, it sends an acknowledgment (ACK) to the base station to indicate successful data reception; if reception fails, it sends a negative acknowledgment (NACK) to the base station to indicate data reception failure. Correspondingly, for the base station, if it receives an ACK, it sends the next data to the terminal; if it receives a NACK, it retransmits the previous data.

[0004] However, analysis revealed that the above method suffers from low transmission efficiency. Summary of the Invention

[0005] This application provides a communication method and a communication device that can improve data transmission efficiency.

[0006] In a first aspect, embodiments of this application provide a communication method, which can be executed by a first communication device. For example, it can be executed by the entire first communication device itself, or by a component (such as a processor, chip, chip system, etc.) configured in the first communication device, or by a logic module or software capable of implementing all or part of the functions of the first communication device. This application does not limit the scope of the method.

[0007] The communication method includes: receiving first data on a first time-frequency resource; transmitting the first data through N transport streams; the first data includes first retransmitted data and first initial data; the first retransmitted data is the data of a retransmitted first data block; the first initial data is the data of an initially transmitted second data block; the first retransmitted data is transmitted through M of the N transport streams; and the first initial data is transmitted through transport streams other than the M transport streams from the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N; and obtaining a first data block based on the data transmitted in the M transport streams.

[0008] In this application, the first retransmission data refers to the data of the retransmitted first data block, or alternatively, the first retransmission data refers to the retransmission data of the first data block. The first initial transmission data refers to the data of the initially transmitted second data block, or alternatively, the first initial transmission data refers to the initial transmission data of the second data block.

[0009] The data in the first data block of the initial transmission is also called the second initial transmission data.

[0010] In this application, the end that sends the first data is referred to as the second communication device.

[0011] In other words, the first data received by the first communication device can be considered to include two parts: one part is the data of the first data block retransmitted by the second communication device, and the other part is the data of the second data block initially transmitted by the second communication device. In this application, the initial transmission can also be understood as the retransmission.

[0012] Based on the method provided in the first aspect, since the second data block is transmitted simultaneously with the retransmission of the first data block, the latency of the second communication device sending the second data block can be reduced, thereby improving the data transmission efficiency between the first and second communication devices. Furthermore, in this technical solution, the retransmitted first data block and the initially transmitted second data block occupy the same time-frequency resources, thus also improving the utilization rate of time-frequency resources.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: receiving first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0014] Thus, the first communication device can know, based on the first information, which of the N transmission streams transmits the first retransmission data and which transmission streams transmit the first initial transmission data, and based on the second information, know the second data block corresponding to the newly transmitted first initial transmission data and the first data block corresponding to the first retransmission data.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: receiving third information, the third information being used to indicate that the first data is data including initial transmission data and retransmission data.

[0016] Alternatively, the third information can be understood as indicating that the first data is a mixture of transmitted and retransmitted data. Thus, upon receiving the third information, the second communication device can determine that the first data it sent is mixed data. Therefore, when receiving the first data, it can directly store the initial transmitted data and then merge the first retransmitted data with the data stored in the partition corresponding to the first data block in the buffer to determine the first data block.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: receiving fourth information, the fourth information being used to indicate the modulation and coding scheme (MCS) corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0018] In this implementation, the MCS corresponding to the first retransmission data can be flexibly indicated. When the indicated MCS corresponding to the first retransmission data is less than the MCS corresponding to the transmitted second initial transmission data, the first time-frequency resources used for transmitting the first data can be reduced. Conversely, when the indicated MCS corresponding to the first retransmission data is greater than the MCS corresponding to the transmitted second initial transmission data, it helps to increase the probability of successful retransmission.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: receiving fifth information, the fifth information being used to indicate the redundant version (RV) corresponding to the first retransmitted data and the RV corresponding to the first initial transmitted data.

[0020] Based on this implementation method, the RV corresponding to the first retransmission data can be flexibly indicated. In this way, the number of times the first data block is retransmitted can be reduced by optimizing the RV corresponding to the first retransmission data.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: sending a sixth message, the sixth message including a first confirmation message and a second confirmation message, the first confirmation message indicating whether the first data block was successfully received, and the second confirmation message indicating whether the second data block was successfully received; or...

[0022] The first confirmation message is used to indicate whether each code block group (CBG) included in the first data block has been successfully received, and the second confirmation message is used to indicate whether each CBG included in the second data block has been successfully received.

[0023] In this way, after the second communication device receives the sixth information, it can determine whether the first data block and / or the second data block have been successfully transmitted based on the sixth information, and thus determine the next data to be sent.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, before receiving the first data on the first time-frequency resource, the method further includes: sending a seventh message, the seventh message indicating the signal-to-interference-plus-noise ratio (SINR) of the demodulated signal corresponding to each transport stream used for transmitting the second initial transmission data, wherein the second initial transmission data is the data of the first data block of the initial transmission; wherein the SINR of the demodulated signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used for transmitting the first retransmission data.

[0025] Based on this implementation, when the second communication device determines the M transmission streams used to transmit the first retransmission data, it can refer to the SINR of the demodulation signal corresponding to each of the above transmission streams reported by the first communication device, so as to determine the M transmission streams that can make the first retransmission data occupy the fewest transmission streams and still be retransmitted successfully in one go based on the SINR of the demodulation signal corresponding to each of the reported transmission streams.

[0026] Secondly, embodiments of this application provide a communication method that can be executed by a second communication device. For example, it can be executed by the second communication device itself, or by a component (such as a processor, chip, chip system, etc.) configured in the second communication device, or by a logic module or software capable of implementing all or part of the functions of the second communication device. This application does not limit the scope of the method.

[0027] The communication method includes: transmitting first data on a first time-frequency resource, the first data being transmitted through N transport streams, the first data including first retransmission data and first initial transmission data, the first retransmission data being the data of a retransmitted first data block, the first initial transmission data being the data of an initially transmitted second data block, the first retransmission data being transmitted through M of the N transport streams, and the first initial transmission data being transmitted through transport streams other than M of the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N.

[0028] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: sending first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0029] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: sending third information, wherein the third information is used to indicate that the first data is data including initial transmission data and retransmission data.

[0030] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: sending fourth information, which is used to indicate the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0031] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: sending a fifth message, the fifth message being used to indicate the RV corresponding to the first retransmitted data and the RV corresponding to the first initial transmitted data.

[0032] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: receiving sixth information, the sixth information including first confirmation information and second confirmation information, the first confirmation information being used to indicate whether the first data block was successfully received, and the second confirmation information being used to indicate whether the second data block was successfully received; or, the first confirmation information being used to indicate whether each CBG included in the first data block was successfully received, and the second confirmation information being used to indicate whether each CBG included in the second data block was successfully received.

[0033] In conjunction with the second aspect, in some implementations of the second aspect, before transmitting the first data on the first time-frequency resource, the method further includes: receiving seventh information, the seventh information indicating the SINR of the demodulation signal corresponding to each transport stream used for transmitting the second initial transmission data, the second initial transmission data being the data of the first data block of the initial transmission; wherein, the SINR of the demodulation signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used for transmitting the first retransmission data.

[0034] Thirdly, this application provides a communication device that has the functions of the first aspect described above. For example, the communication device includes modules, units, or means that perform the operations involved in the first aspect. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0035] In one possible implementation, the communication device includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module). The transceiver unit is capable of both sending and receiving functions. When the transceiver unit performs the sending function, it can be called a sending unit (sometimes also called a sending module); when it performs the receiving function, it can be called a receiving unit (sometimes also called a receiving module). The sending unit and the receiving unit can be the same functional module, which is called the transceiver unit and can perform both sending and receiving functions; alternatively, the sending unit and the receiving unit can be different functional modules, with the transceiver unit being a collective term for these functional modules.

[0036] In one possible implementation, the transceiver module is configured to: receive first data on a first time-frequency resource, the first data being transmitted through N transport streams, the first data including first retransmitted data and first initial data, the first retransmitted data being the data of a retransmitted first data block, the first initial data being the data of an initially transmitted second data block, the first retransmitted data being transmitted through M of the N transport streams, and the first initial data being transmitted through transport streams other than the M transport streams among the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N; the processing module is configured to: obtain a first data block based on the data transmitted in the M transport streams.

[0037] In one possible implementation, the transceiver module is further configured to: receive first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0038] In one possible implementation, the transceiver module is further configured to: receive third information, which indicates that the first data is data including initial transmission data and retransmission data.

[0039] In one possible implementation, the transceiver module is further configured to: receive fourth information, which indicates the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0040] In one possible implementation, the transceiver module is further configured to: receive fifth information, which is used to indicate the RV corresponding to the first retransmitted data and the RV corresponding to the first initial transmitted data.

[0041] In one possible implementation, the transceiver module is further configured to: send a sixth message, the sixth message including a first confirmation message and a second confirmation message, wherein the first confirmation message is used to indicate whether the first data block was successfully received and the second confirmation message is used to indicate whether the second data block was successfully received; or, the first confirmation message is used to indicate whether each CBG included in the first data block was successfully received and the second confirmation message is used to indicate whether each CBG included in the second data block was successfully received.

[0042] In one possible implementation, the transceiver module is further configured to: before receiving the first data on the first time-frequency resource, send a seventh message, the seventh message indicating the SINR of the demodulation signal corresponding to each transport stream used to transmit the second initial transmission data, the second initial transmission data being the data of the first data block of the initial transmission; wherein, the SINR of the demodulation signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used to transmit the first retransmission data.

[0043] The third aspect provides some possible implementation methods and beneficial effects, which can be referenced from the first aspect and will not be elaborated further.

[0044] Fourthly, this application provides a communication device that has the functions of the second aspect above. For example, the communication device includes modules, units, or means that perform the operations involved in the second aspect above. These modules, units, or means can be implemented by software, hardware, or a combination of software and hardware.

[0045] In one possible implementation, the communication device includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module). The transceiver unit is capable of both sending and receiving functions. When the transceiver unit performs the sending function, it can be called a sending unit (sometimes also called a sending module); when it performs the receiving function, it can be called a receiving unit (sometimes also called a receiving module). The sending unit and the receiving unit can be the same functional module, which is called the transceiver unit and can perform both sending and receiving functions; alternatively, the sending unit and the receiving unit can be different functional modules, with the transceiver unit being a collective term for these functional modules.

[0046] In one possible implementation, the transceiver module is used to: transmit first data on a first time-frequency resource, the first data being transmitted through N transport streams, the first data including first retransmitted data and first initial data, the first retransmitted data being the data of the retransmitted first data block, the first initial data being the data of the initially transmitted second data block, the first retransmitted data being transmitted through M of the N transport streams, and the first initial data being transmitted through the transport streams other than the M transport streams among the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N.

[0047] In one possible implementation, the transceiver module is further configured to: send first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0048] In one possible implementation, the transceiver module is further configured to: send third information, which indicates that the first data includes both initial transmission data and retransmission data.

[0049] In one possible implementation, the transceiver module is further configured to: send fourth information, which indicates the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0050] In one possible implementation, the transceiver module is further configured to: send a fifth message, which indicates the RV corresponding to the first retransmitted data and the RV corresponding to the first initial transmitted data.

[0051] In one possible implementation, the transceiver module is further configured to: receive a sixth message, the sixth message including a first confirmation message and a second confirmation message, the first confirmation message indicating whether the first data block was successfully received, and the second confirmation message indicating whether the second data block was successfully received; or, the first confirmation message indicating whether each CBG included in the first data block was successfully received, and the second confirmation message indicating whether each CBG included in the second data block was successfully received.

[0052] In one possible implementation, before transmitting the first data on the first time-frequency resource, the transceiver module is further configured to: receive seventh information, the seventh information indicating the SINR of the demodulation signal corresponding to each transport stream used for transmitting the second initial transmission data, the second initial transmission data being the data of the first data block of the initial transmission; wherein, the SINR of the demodulation signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used for transmitting the first retransmission data.

[0053] Fifthly, this application provides a communication device including a processor, the processor being configured to perform the methods described in any of the foregoing aspects and any possible implementations of any of the foregoing aspects.

[0054] In one possible implementation, the processor is configured to, by executing a computer program or instructions, and / or, by logic circuitry, cause the communication device to perform the method described in any of the above aspects and any possible implementations of any of the aspects.

[0055] The apparatus may further include a memory for storing instructions and / or data. The memory is coupled to the processor, which, when executing the instructions stored in the memory, can implement the methods described in the foregoing aspects. Optionally, the memory and the processor are integrated together.

[0056] The device may also include a communication interface for communicating with other devices. For example, the communication interface may be a transceiver, circuit, bus, module or other type of communication interface.

[0057] In one possible implementation, the aforementioned device may be a terminal, or a communication module in the terminal, or a chip in the terminal responsible for communication functions such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.

[0058] In one possible implementation, the aforementioned device may be an access network device, or a communication module in the access network device, or a chip in the access network device responsible for communication functions, such as a modem chip (also known as a baseband chip), or a SoC or SIP chip containing a modem module.

[0059] Sixthly, this application provides a chip system including at least one processor for supporting the functions involved in any of the above aspects and any possible implementations of any aspect.

[0060] In one possible design, the chip system also includes a memory for storing program instructions and data, which may be located within or outside the processor.

[0061] The chip system can consist of chips or include chips and other discrete components.

[0062] In a seventh aspect, this application provides a computer-readable storage medium including a computer program that, when run on a computer, causes the computer to implement the methods in any of the foregoing aspects and any possible implementations of any of the foregoing aspects.

[0063] Eighthly, this application provides a computer program product comprising: a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the methods in any of the foregoing aspects and any possible implementations of any of the foregoing aspects.

[0064] Ninthly, this application provides a communication system including the aforementioned terminal and access network device. The terminal is used to execute the methods described in the first aspect and any possible implementation thereof; the access network device is used to execute the methods described in the second aspect and any possible implementation thereof.

[0065] The third to ninth aspects mentioned above correspond to the technical solutions of the first or second aspects of this application. The beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be repeated here. Attached Figure Description

[0066] Figure 1 is a schematic diagram of the scenarios in which the technical solution of this application can be applied;

[0067] Figure 2 shows a schematic diagram of retransmission based on HARQ feedback;

[0068] Figure 3 is a flowchart illustrating a communication method provided in one embodiment of this application;

[0069] Figure 4 illustrates a schematic diagram of transmission based on N transport streams;

[0070] Figure 5 shows a schematic diagram of the transmission streams corresponding to the first retransmission data and the first initial transmission data;

[0071] Figure 6 is a structural schematic diagram of a communication device provided in an embodiment of this application;

[0072] Figure 7 is a structural schematic diagram of a communication device provided in another embodiment of this application. Detailed Implementation

[0073] Figure 1 is a schematic diagram of the architecture of a communication system 1000 provided in an embodiment of this application. It is understood that the system architecture described in this application embodiment is for the purpose of more clearly illustrating the technical solutions of this application embodiment and does not constitute a limitation on the technical solutions provided in this application embodiment.

[0074] As shown in Figure 1, the communication system 1000 includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal (120a-120j in Figure 1, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment (not shown in Figure 1). The terminal 120 is wirelessly connected to the RAN node 110. Terminals and RAN nodes can be interconnected via wired or wireless means. The communication system 1000 may also include a core network 200. The RAN node 110 is connected to the core network 200 wirelessly or via wired means. The core network equipment in the core network 200 and the RAN node 110 in the RAN 100 can be independent and different physical devices, or they can be the same physical device integrating the logical functions of the core network equipment and the logical functions of the RAN node. The communication system 1000 may also include an Internet 300.

[0075] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0076] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, or a base station in a future mobile communication system. RAN nodes can be macro base stations (as shown in Figure 1, 110a), micro base stations or indoor stations (as shown in Figure 1, 110b), relay nodes, or donor nodes.

[0077] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0078] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0079] A terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminals can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.

[0080] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0081] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminals 120j that access the wireless access network 100 through 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.

[0082] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0083] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0084] To facilitate understanding of the technical solutions provided in this application, some concepts involved in this application will be introduced below.

[0085] 1. HARQ

[0086] HARQ is a technique that combines forward error correction (FEC) and automatic repeat request (ARQ). In HARQ, after the sender transmits a transport block (for ease of understanding, denoted as transport block #1):

[0087] 1) If the receiving end successfully decodes transport block #1, it sends an ACK to the sending end to indicate that transport block #1 was successfully received. Correspondingly, after receiving the ACK, the sending end can send the next new transport block (e.g., transport block #2) to the receiving end.

[0088] 2) If the receiver fails to decode transport block #1, it buffers the received data and sends a NACK to the sender to indicate that the decoding of transport block #1 has failed; correspondingly, the sender retransmits the data of transport block #1 after receiving the NACK; the receiver receives the retransmitted data of transport block #1 and merges the data of transport block #1 received multiple times to obtain transport block #1.

[0089] In one implementation, each transport block corresponds to a cyclic redundancy check (CRC) for error detection. At the receiving end, the transport block #1 sent by the sending end can be verified based on the CRC to determine whether decoding was successful.

[0090] Generally, the data of the transport block initially transmitted by the sender (also called the initial transmission) is also referred to as the initial transmission data of the transport block, and the data of the retransmitted transport block is also referred to as the retransmission data of the transport block. In some examples, the initial transmission may also be called the new transmission.

[0091] 2. HARQ feedback delay

[0092] HARQ feedback latency refers to the time required from the sender transmitting a transport block to the receiver responding with an ACK or NACK. For example, HQRQ feedback latency can be 3 to 4 milliseconds.

[0093] 3. HARQ feedback based on CBG

[0094] For transmissions with high data transmission rates, a transport block can typically contain hundreds of code blocks (CBs). If only a few CBs are corrupted, retransmitting the entire transport block would result in low spectral efficiency.

[0095] To avoid unnecessary retransmissions of successfully decoded blocks (CBs), an efficient retransmission scheme is to introduce HARQ feedback for each CB. However, if the HARQ mechanism needs to locate a single erroneous CB, it will result in significant control signaling overhead. To achieve higher transmission efficiency and reduce control signaling overhead, the concept of code block groups (CBGs) was introduced in NR. A transport block can consist of one or more CBGs, and each CBG consists of one or more CBs. Thus, when the receiver performs HARQ feedback, it can use 1 bit of HARQ feedback for each CBG. Specifically, when all CBs within a CBG are correctly decoded, the 1 bit associated with that CBG is used for ACK feedback; otherwise, the 1 bit associated with that CBG is used for NACK feedback to indicate that the CBG needs to be retransmitted.

[0096] In this implementation, when retransmitting data from a transport block, only the CBG to which the erroneous CB belongs needs to be retransmitted, instead of the entire transport block, thus saving resources consumed by retransmission. The size of the CBG can be specified by radio resource controller (RRC) messages, and the CBG to which each CB belongs is determined during the initial transmission and remains unchanged.

[0097] 4. HARQ process

[0098] In HARQ technology, a stop-and-wait protocol can be used to transmit data. In this protocol, the sender transmits a block of data and then pauses to receive ACK or NACK acknowledgments. However, for the sender, pausing after each transmission to wait for acknowledgment from the receiver results in low throughput. Therefore, multiple parallel stop-and-wait processes can be used: while one HARQ process is waiting for acknowledgment, the sender can use another HARQ process to continue transmitting data. These HARQ processes together form a HARQ entity. Each terminal has its own HARQ entity.

[0099] Each HARQ process needs an independent HARQ buffer at the receiving end in order to merge the received data.

[0100] 5. New Data Indicator (NDI)

[0101] Each HARQ process corresponds to an NDI, which indicates whether the scheduled data is a new transmission or a retransmission. If the NDI value of the same HARQ process has changed compared to before (NDI toggled), it means that the data being transmitted is the initial transmission; otherwise (NDI not toggled), it means that the data being transmitted is a retransmission.

[0102] 6. Channel Rank

[0103] Channel rank refers to the maximum number of independent data streams (or transport streams) that a channel can support in a communication system. In multiple-input multiple-output (MIMO) systems, channel rank reflects the spatial dimension of the channel, that is, the number of different data streams the channel can transmit simultaneously. When the number of transport streams is less than or equal to 4, the protocol definition uses one codeword; when the number of transport streams is greater than 4, the protocol definition uses two codewords.

[0104] As described above regarding HARQ, after the sending end sends a transport block #1 to the receiving end, if the receiving end responds with a NACK for transport block #1, the sending end will then send a retransmitted version of transport block #1 to the receiving end so that the receiving end can determine transport block #1 based on the retransmitted data. If the receiving end responds with an ACK, the sending end can then send a new transport block (e.g., transport block #2) to the receiving end. However, analysis reveals that this data transmission method suffers from low transmission efficiency.

[0105] For example, as shown in Figure 2, data transmission begins in time slot 1. Assume the receiver fails to decode TB#1 (e.g., TB#1) sent by the sender in time slot 11, and the receiver determines to send a NACK. If the HARQ feedback delay is 4 milliseconds, the receiver will send a NACK in time slot 20. After receiving the NACK for TB#1, the sender retransmits the data of TB#1 in time slot 21. Understandably, when TB#1 is retransmitted in time slot 21, other pending data transmissions are delayed, resulting in low transmission efficiency. Furthermore, as shown in Figure 2, there is one downlink time slot between time slot 20 and the packet delay budget (PDB). TB#1 only has one retransmission opportunity left. Therefore, retransmitting the data of TB#1 in time slot 21 may also result in unreliable retransmission success.

[0106] In view of this, this application provides a communication method and a communication device.

[0107] The communication method provided in this application will now be described in detail with reference to the accompanying drawings.

[0108] The method is described below using the interaction between a first communication device and a second communication device as an example. In one example, the first communication device can be a terminal device, and the second communication device can be a network device. In another example, the first communication device can be a network device, and the second communication device can be a terminal device.

[0109] The terminal device may be a terminal, a communication module in the terminal, or a component in the terminal responsible for communication functions (such as circuits, chips (such as modem chips, also known as baseband chips, or system-on-chip (SoC) chips or system-in-package (SIP) chips containing modem cores), chip systems, or processors, etc.), and this application does not limit it in this regard.

[0110] The network device may be, for example, an access network device, a communication module in the access network device, or a component in the access network device responsible for communication functions (such as circuits, chips (such as modem chips, also known as baseband chips, or SoC chips or SIP chips containing modem cores, chip systems or processors, etc.), which are not limited in this application.

[0111] For a detailed description of the terminal and access network equipment, please refer to the relevant description in Figure 1 above. For the sake of brevity, it will not be repeated here.

[0112] Figure 3 is a schematic flowchart of the communication method 30 provided in this application. As shown in Figure 3, method 30 includes:

[0113] S310, the second communication device transmits first data on the first time-frequency resource; correspondingly, the first communication device receives the first data on the first time-frequency resource.

[0114] The second communication device can indicate to the first communication device the first time-frequency resource occupied by the first data, so that the first communication device knows that it is receiving the first data on the first time-frequency resource.

[0115] For example, the second communication device is a network device, and the first communication device is a terminal. Alternatively, the second communication device is a terminal, and the first communication device is a network device.

[0116] In this application, when the second communication device sends first data to the first communication device, the first data sent includes first retransmission data and first initial transmission data. The first retransmission data is the data of the retransmitted first data block, and the first initial transmission data is the data of the initially transmitted second data block. The initial transmission data can also be described as newly transmitted data. That is to say, the first data sent by the second communication device can be considered to include two parts: one part is the data of the retransmitted first data block, and the other part is the data of the initially transmitted / newly transmitted second data block.

[0117] For example, after receiving information 1 from the first communication device, the second communication device sends first data including first retransmission data to the first communication device, wherein information 1 indicates that the first communication device failed to decode the first data block initially transmitted by the second communication device. In this application, the data of the first data block initially transmitted by the second communication device is also referred to as the second initial transmission data.

[0118] Understandably, in one implementation, the first retransmitted data sent by the second communication device is the same as the second initial data. For example, when the first communication device sends information 1 to the second communication device, information 1 indicates that the decoding of the first data block failed. Therefore, when the second communication device retransmits the data of the first data block, the retransmitted first retransmitted data is the same as the second initial data. In another implementation, the first retransmitted data is different from the second initial data. For example, when the first communication device sends information 1 to the second communication device, information 1 indicates that the decoding of the first CBG in the first data block failed. Therefore, when the second communication device retransmits the data of the first data block, the retransmitted first retransmitted data may simply be the first CBG that failed to decode. Decoding failure can also be understood as reception failure or parsing failure.

[0119] For example, when the second communication device is an access network device, the access network device receives service data sent by the core network device that needs to be sent by the access network device to the terminal. This service data includes data from a first transport block and data from a second transport block. Understandably, the size of the first transport block and the size of the second transport block can be the same or different.

[0120] This application does not limit the specific granularity of the first data. For example, the granularity of the first data can be a transport block (TB). That is, the first data can be replaced by a first TB, which includes the data of the retransmitted first data block and the data of the initially transmitted second data block. Alternatively, the first data can also be replaced by a first data packet.

[0121] In this application, when the second communication device sends first data, the first data is transmitted through N transport streams. A transport stream can also be described as a data stream or a transport layer.

[0122] The transmission of the first data through N transport streams can also be referred to as the transmission of the first data through N transport streams, or the transmission of the first data mapped onto N transport streams.

[0123] Specifically, the first retransmitted data in the first data is transmitted through M of the N transport streams, and the first initial transmitted data in the first data is transmitted through the transport streams other than M of the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N. In other words, the first initial transmitted data and the first retransmitted data are transmitted through different transport streams.

[0124] In one embodiment, when the second communication device maps the first retransmitted data onto M of the N transport streams, if M is less than or equal to 4, the first retransmitted data is mapped based on one codeword; if M is greater than 4, the first retransmitted data is mapped based on two codewords. Similarly, when the second communication device maps the first initial transmitted data onto the remaining NM transport streams, if NM is less than or equal to 4, the first initial transmitted data is mapped based on one codeword; if NM is greater than 4, the first initial transmitted data is mapped based on two codewords.

[0125] For example, as shown in Figure 4, the first initial transmission data includes d (0) (4i), d (0) (4i+1), d (0) (4i+2), d (0) (4i+3), ...; The first retransmission data includes d (1) (4i), d (1) (4i+1), d (1) (4i+2), d (1) (4i+3), ... As shown in Figure 4, d (0) (4i), d (0) (4i+1), d (0) (4i+2), d (0) (4i+3) becomes x after a codeword mapping. (0) (i), x (1) (i), x (2) (i), x (3) (i) corresponds to transmission on transport stream 0, transport stream 1, transport stream 2, and transport stream 3, respectively. d (1) (4i), d (1) (4i+1), d (1) (4i+2), d (1) (4i+3) becomes x after a codeword mapping. (4) (i), x (5) (i), x (6) (i), x(7) (i) corresponds to transmission on transport stream 4, transport stream 5, transport stream 6, and transport stream 7, respectively. That is, in this example, N equals 8, and 4 of these 8 transport streams are used to transmit the first retransmission data, while the other 4 transport streams are used to transmit the first initial transmission data.

[0126] Specifically, the second communication device can determine the aforementioned N transport streams based on the channel rank between the first and second communication devices. For example, N can be equal to 4.

[0127] Understandably, for the transport stream occupied by the first data block of the initial transmission (i.e., the second initial transmission data), in one scenario, the second initial transmission data is transmitted through the aforementioned N transport streams. In another scenario, the second initial transmission data is transmitted through a portion of the aforementioned N transport streams. For example, the second initial transmission data sent by the network device is included in the second data, which, in addition to the aforementioned second initial transmission data, also includes second retransmission data, which is the data of the retransmitted third data block. In this case, the second initial transmission data is transmitted through a portion of the N transport streams, and the second retransmission data is transmitted through another portion of the N transport streams.

[0128] S320, the first communication device determines the first data block based on the data transmitted in the M transport streams.

[0129] In this application, after receiving first data on a first time-frequency resource, the first communication device determines a first data block based on first retransmission data in the first data. Determining the first data block based on the first retransmission data includes: determining the first data block based on the first retransmission data and the second initial transmission data.

[0130] In practice, the second communication device may send first information and second information to the first communication device before sending the first data.

[0131] The first information is used to indicate the M transport streams out of N transport streams that are used to transmit the first retransmission data. This first information can also be called a retransmission occupancy stream indicator. In one implementation, the first information includes N bits, each corresponding to one of the N transport streams. Each bit indicates whether the corresponding transport stream is used to transmit the first retransmission data or the first initial transmission data. For example, if N equals 4, the first information can include 4 bits corresponding to the 4 transport streams. A bit of 0 indicates that the corresponding transport stream is used to transmit the first initial transmission data, and a bit of 1 indicates that the corresponding transport stream is used to transmit the first retransmission data; alternatively, a bit of 0 indicates that the corresponding transport stream is used to transmit the first retransmission data, and a bit of 1 indicates that the corresponding transport stream is used to transmit the first initial transmission data.

[0132] The second information is used to indicate the identifier of the first data block corresponding to the first retransmitted data and the identifier of the second data block corresponding to the first initial transmitted data. The identifiers of the first and second data blocks can also be described as the numbers of the first and second data blocks. The second information can also be referred to as processing number extension information, for example.

[0133] Correspondingly, after receiving the first information and the second information, the first communication device learns, based on the first information and the second information, which of the N transport streams the first retransmission data in the first data corresponds to the first data block and which of the N transport streams the first retransmission data occupies, as well as the second data block the first initial transmission data in the first data and which of the N transport streams the first initial transmission data occupies, and thus receives the first retransmission data and the first initial transmission data respectively.

[0134] In one implementation, when the first communication device receives the first retransmitted data and the first initial transmitted data respectively, it can partition and cache the received first retransmitted data and the first initial transmitted data. For example, the first communication device can assign a unique identifier (e.g., also called a partition identifier) ​​to each partition to ensure that the positions of the first data block and the second data block in the cache can be addressed independently. Correspondingly, the first communication device directly stores the received first initial transmitted data, and then merges the received first retransmitted data with the data stored in the partition corresponding to the first data block in the cache to determine the first data block.

[0135] In one implementation, the second communication device may further send third information to itself, the third information indicating that the first data includes both initial transmission data and retransmission data. Alternatively, the third information can be understood as indicating that the first data is mixed data. For example, the third information may include 2 bits: when the 2 bits are of a first value, it indicates that the transmitted first data includes only initial transmission data; when the 2 bits are of a second value, it indicates that the transmitted first data includes only retransmission data; and when the 2 bits are of a third value, it indicates that the transmitted first data is mixed data including retransmission data.

[0136] In this application, when the second communication device transmits the first data, in one implementation, the second communication device uses the same MCS to transmit the first retransmitted data and the first initial transmitted data. In another implementation, the second communication device uses different MCS to transmit the first retransmitted data and the first initial transmitted data.

[0137] In one implementation, the second communication device can send fourth information to the first communication device. This fourth information indicates the modulation scheme (MCS) corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data, thereby enabling the first communication device to know the modulation order and code rate corresponding to the first retransmitted data and the first initial transmitted data. For example, the fourth information includes 10 bits, with the first 5 bits indicating the MCS corresponding to the first retransmitted data and the last 5 bits indicating the MCS corresponding to the first initial transmitted data. Alternatively, the last 5 bits indicate the MCS corresponding to the first retransmitted data, and the first 5 bits indicate the MCS corresponding to the first initial transmitted data.

[0138] In this application, the second communication device may also send fifth information to the first communication device, the fifth information being used to indicate the RV corresponding to the first retransmission data and the RV corresponding to the first initial transmission data.

[0139] In one scenario, the second communication device is an access network device, the first communication device is a terminal, and one or more of the first, second, third, fourth, and fifth information can be carried in downlink control information (DCI).

[0140] In this application, after receiving the first data, the first communication device can send a sixth message to the second communication device, the sixth message including a first confirmation message and a second confirmation message.

[0141] In one implementation, a first confirmation message indicates whether the first data block was successfully received, and a second confirmation message indicates whether the second data block was successfully received. Successful reception can also be described as successful decoding / demodulation / parsing, etc. Thus, the second communication device can determine whether the first and second data blocks were successfully transmitted based on the received sixth message, thereby determining whether to send a new data block or retransmit the data from the first and / or second data blocks. For example, in this implementation, the sixth message may include 2 bits, where 1 bit corresponds to the first confirmation message and the other bit corresponds to the second confirmation message.

[0142] In another implementation, the first confirmation information is used to indicate whether each CBG included in the first data block has been successfully received, and the second confirmation information is used to indicate whether each CBG included in the second data block has been successfully received. Thus, the second communication device can determine, based on the received first confirmation information, which CBGs in the first data block were successfully transmitted and which were not, and based on the received second confirmation information, which CBGs in the second data block were successfully transmitted and which were not, thereby determining the data that needs to be sent to the first communication device next.

[0143] Based on method 30, since the second data block is initially transmitted simultaneously with the retransmission of the first data block, the latency of the second communication device sending the second data block can be reduced, thereby improving the data transmission efficiency between the first and second communication devices. Furthermore, in this technical solution, the retransmitted first data block and the initially transmitted second data block occupy the same time-frequency resources, thus also improving the utilization rate of time-frequency resources.

[0144] The following describes one implementation method for the second communication device to determine M of the N transport streams used for transmitting the first retransmission data.

[0145] One implementation of the second communication device determining M transport streams includes: after the first communication device receives the data of the first data block initially transmitted by the second communication device (i.e., the second initial transmission data), it calculates the signal-to-interference-plus-noise ratio (SINR) of the demodulated signal corresponding to each transport stream used to transmit the second initial transmission data. That is, the first communication device calculates the SINR corresponding to each transport stream when demodulating the signal in each transport stream used to transmit the second initial transmission data; the first communication device sends a seventh message to the second communication device, the seventh message indicating the SINR of the demodulated signal corresponding to each transport stream used to transmit the second initial transmission data; after receiving the seventh message, the second communication device determines M transport streams from N transport streams used to transmit the first retransmission data based on the SINR of the demodulated signal corresponding to each transport stream.

[0146] The first retransmission data and the first initial transmission data occupy the same time-frequency resources and correspond to different transmission streams in the spatial domain (i.e., the first initial transmission data and the first retransmission data can also be considered to be orthogonal in the spatial domain). The signal y received by the first communication device on the first time-frequency resources can be expressed as:

[0147] Where H represents the channel matrix, V represents the precoding matrix, and x represents the first retransmission data. new Let G represent the first initial transmission data, G be the matrix used to map the first retransmission data, and P be the matrix used to map the first initial transmission data. H Let n denote the conjugate transpose of G, and n1 denote noise.

[0148] Because the first initial transmission data and the first retransmission data are orthogonal in the spatial domain, the received first retransmission data y R It can also be represented as: y R =Λ R Gx+n2

[0149] Furthermore, the received first retransmission data and the received second initial transmission data are combined, and the combined data can be represented as:

[0150] Among them, y F This indicates the second initial transmission data received, Λ F To receive the second initial transmission data y F The singular value matrix corresponding to time, Λ R To receive the first retransmission data y R The first M rows and M columns of the singular value matrix obtained by performing singular value decomposition on the channel matrix H. Furthermore, also: B = (AA) T ) -1 ;

[0151] Then, the SINR increase of the i-th transport stream after adding the first retransmission data is ΔSINR. i This can be represented as: ΔSINR i =B ii / Λ F,ii

[0152] B ii Let Λ represent the value in the i-th row and i-th column of matrix B. F,ii Represents Λ F The value of the i-th row and i-th column.

[0153] Furthermore, by optimizing G, that is, optimizing the transmission flow occupied by the first retransmission data and the first initial transmission data, the first retransmission data can be retransmitted successfully in one attempt with the least amount of transmission flow: min||G|| 2 stSINR eff (SINR i +ΔSINR i SINR thr (MCS)

[0154] in, Indicates the effective SINR of demodulation, where I represents the total number of transport streams occupied by the second initial transmission data and the first retransmission data; SINR i SINR represents the SINR corresponding to the demodulation of the signal in the i-th transport stream used for transmitting the second initial data. thr (MCS) represents the SINR value that achieves the target block error rate (BLER) under the current MCS.

[0155] For example, N equals 4. As shown in Figure 5, when the second communication device initially transmits the first data block, it uses 4 streams to transmit the data of the first data block (i.e., the second initial transmission data). Afterwards, the first communication device sends a NACK to the second communication device, indicating that the first data block was not successfully decoded, and also indicates the SINR of the demodulation signals corresponding to the 4 transmission streams used to transmit the second initial transmission data. Correspondingly, the second communication device determines that the data of the first data block needs to be retransmitted based on the NACK sent by the first communication device, and determines that the first retransmission data is transmitted based on the SINR of the demodulation signals corresponding to the 4 transmission streams indicated by the first communication device. The remaining 3 streams are used to transmit new data (i.e., the first initial transmission data).

[0156] As an example, when the second communication device transmits the second initial data through four transport streams, the SINR of the demodulated signal corresponding to the first demodulated transport stream is approximately 20 dB, the SINR of the demodulated signal corresponding to the second demodulated transport stream is approximately 20 dB, the SINR of the demodulated signal corresponding to the third demodulated transport stream is approximately 10 dB, and the SINR of the demodulated signal corresponding to the fourth demodulated transport stream is approximately 10 dB. Correspondingly, the effective SINR is approximately 12.29 dB.

[0157] When the second communication device transmits the first retransmission data based on the above four streams, the SINR of the demodulated signal corresponding to the first transport stream demodulated by the second communication device is approximately 23dB, the SINR of the demodulated signal corresponding to the second transport stream demodulated is approximately 23dB, the SINR of the demodulated signal corresponding to the third transport stream demodulated is approximately 13dB, and the SINR of the demodulated signal corresponding to the fourth transport stream demodulated is approximately 13dB. Correspondingly, the effective SINR is approximately 14.30dB.

[0158] When the second communication device transmits the first retransmission data based on one of the four transmission streams mentioned above, and uses the remaining three transmission streams to transmit the first initial transmission data, the SINR of the demodulated signal corresponding to the first transmission stream demodulated by the second communication device is approximately 20dB, the SINR of the demodulated signal corresponding to the second transmission stream is approximately 20dB, the SINR of the demodulated signal corresponding to the third transmission stream is approximately 11.4dB, and the SINR of the demodulated signal corresponding to the fourth transmission stream is approximately 14.4dB. Correspondingly, the effective SINR is approximately 14.04dB.

[0159] Below, for ease of understanding, taking the second communication device as an access network device and the first communication device as a terminal as an example, the communication method proposed in this application will be further described. Specifically, the communication method includes:

[0160] Step 1: The access network device selects a suitable MCS based on the current channel state information (CSI) and determines the precoding matrix.

[0161] Step 2: The access network device performs initial transmission of the first data block based on the determined MCS and precoding matrix.

[0162] Step 3: The terminal receives the data of the first data block of the initial transmission (which can be considered as the second initial transmission data mentioned above) and calculates the SINR of the demodulated signal corresponding to each transport stream used to transmit the second initial transmission data.

[0163] Step 4: The terminal sends feedback to the network device to indicate whether the second initial data transmission was successfully received, and reports the SINR of the demodulation signals corresponding to each transport stream used to transmit the second initial data transmission.

[0164] Step 5: If the second initial transmission data is not successfully received, the access network device determines the transmission stream used to transmit the first retransmission data and the transmission stream used to transmit the first initial transmission data among the N transmission streams based on the SINR of the demodulation signals corresponding to each transmission stream used to transmit the second initial transmission data reported by the terminal. Then, the first retransmission data and the first initial transmission data are mapped to the corresponding transmission streams and sent, and the device indicates the information related to the first retransmission data and the first initial transmission data to the terminal through DCI.

[0165] Step 6: The access network device sends the first retransmission data and the first initial transmission data based on the same time-frequency resource.

[0166] Step 7: The terminal receives the first data, demodulates and verifies it, and then sends back the sixth information.

[0167] The relevant description of the sixth information can be found in the description in the embodiment of Figure 5, and will not be repeated here.

[0168] The communication method provided in this application has been described above with reference to the accompanying drawings. The communication device provided in this application will now be described.

[0169] Figure 6 is a structural schematic diagram of the communication device provided in an embodiment of this application. Specifically, as shown in Figure 6, the device 600 includes: a transceiver module 601 and a processing module 602.

[0170] For example, in the first embodiment, the transceiver module 601 is configured to: receive first data on a first time-frequency resource, the first data being transmitted through N transport streams, the first data including first retransmission data and first initial transmission data, the first retransmission data being the data of a retransmitted first data block, the first initial transmission data being the data of an initially transmitted second data block, the first retransmission data being transmitted through M of the N transport streams, and the first initial transmission data being transmitted through transport streams other than M of the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N; the processing module 602 is configured to: obtain a first data block based on the data transmitted in the M transport streams.

[0171] In one possible implementation, the transceiver module 601 is further configured to: receive first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0172] In one possible implementation, the transceiver module 601 is further configured to: receive third information, the third information being used to indicate that the first data is data including initial transmission data and retransmission data.

[0173] In one possible implementation, the transceiver module 601 is further configured to: receive fourth information, the fourth information being used to indicate the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0174] In one possible implementation, the transceiver module 601 is further configured to: receive fifth information, the fifth information being used to indicate the RV corresponding to the first retransmission data and the RV corresponding to the first initial transmission data.

[0175] In one possible implementation, the transceiver module 601 is further configured to: send a sixth message, the sixth message including a first confirmation message and a second confirmation message, the first confirmation message indicating whether the first data block was successfully received, and the second confirmation message indicating whether the second data block was successfully received; or, the first confirmation message indicating whether each CBG included in the first data block was successfully received, and the second confirmation message indicating whether each CBG included in the second data block was successfully received.

[0176] For example, processing module 602 is used to determine whether the first data block was successfully received and whether the second data block was successfully received.

[0177] In one possible implementation, the transceiver module 601 is further configured to: before receiving the first data on the first time-frequency resource, send a seventh message, the seventh message indicating the SINR of the demodulation signal corresponding to each transport stream used to transmit the second initial transmission data, the second initial transmission data being the data of the first data block of the initial transmission; wherein, the SINR of the demodulation signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used to transmit the first retransmission data.

[0178] For example, in the second embodiment, the transceiver module 601 is used to: transmit first data on a first time-frequency resource, the first data being transmitted through N transport streams, the first data including first retransmission data and first initial transmission data, the first retransmission data being the data of the retransmitted first data block, the first initial transmission data being the data of the initially transmitted second data block, the first retransmission data being transmitted through M of the N transport streams, and the first initial transmission data being transmitted through the transport streams other than the M transport streams among the N transport streams, where N is a positive integer greater than 1 and M is a positive integer less than N.

[0179] In one possible implementation, the transceiver module 601 is further configured to: send first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmission data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmission data and the identifier of the second data block corresponding to the first initial transmission data.

[0180] In one possible implementation, the transceiver module 601 is further configured to: send third information, the third information being used to indicate that the first data is data including initial transmission data and retransmission data.

[0181] In one possible implementation, the transceiver module 601 is further configured to: send fourth information, the fourth information being used to indicate the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0182] For example, the processing module 602 is used to determine the MCS corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

[0183] In one possible implementation, the transceiver module 601 is further configured to: send fifth information, the fifth information being used to indicate the RV corresponding to the first retransmission data and the RV corresponding to the first initial transmission data.

[0184] In one possible implementation, the transceiver module 601 is further configured to: receive sixth information, the sixth information including first confirmation information and second confirmation information, the first confirmation information being used to indicate whether the first data block was successfully received, and the second confirmation information being used to indicate whether the second data block was successfully received; or, the first confirmation information being used to indicate whether each CBG included in the first data block was successfully received, and the second confirmation information being used to indicate whether each CBG included in the second data block was successfully received.

[0185] In one possible implementation, before transmitting the first data on the first time-frequency resource, the transceiver module 601 is further configured to: receive seventh information, the seventh information indicating the SINR of the demodulation signal corresponding to each transport stream used for transmitting the second initial transmission data, the second initial transmission data being the data of the first data block of the initial transmission; wherein, the SINR of the demodulation signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used for transmitting the first retransmission data.

[0186] Figure 7 is a structural schematic diagram of another communication device provided in an embodiment of this application. The device shown in Figure 7 can be used to perform the methods described in the foregoing embodiments.

[0187] As shown in Figure 7, the device 700 of this embodiment includes a memory 701 and a processor 702. In one implementation, the device 700 further includes a communication interface 703 and a bus 704. The memory 701, processor 702, and communication interface 703 are interconnected via the bus 704.

[0188] The memory 701 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 701 can store programs, and when the program stored in the memory 701 is executed by the processor 702, the processor 702 performs the various steps of the communication method described above.

[0189] The processor 702 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, used to execute relevant programs to implement the various steps of the communication method described above.

[0190] The processor 702 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the method in Figure 3 of this embodiment can be accomplished through integrated logic circuits in the processor 702 or through software instructions.

[0191] The processor 702 described above can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or a conventional processor, etc.

[0192] The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 701. The processor 702 reads the information in memory 701 and, in conjunction with its hardware, completes the functions required by the units included in the device of this application. For example, it can execute the various steps / functions of the communication method described above.

[0193] The communication interface 703 can use, but is not limited to, transceivers to enable communication between the device 700 and other devices or communication networks.

[0194] Bus 704 may include a pathway for transmitting information between various components of device 700 (e.g., memory 701, processor 702, communication interface 703).

[0195] It should be understood that the apparatus 700 shown in the embodiments of this application can be deployed in access network equipment or terminals.

[0196] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be a usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The usable medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0197] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0198] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0199] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not limit the implementation process of the embodiments of this application.

[0200] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0201] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0202] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0203] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0204] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0205] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, include: First data is received on a first time-frequency resource. The first data is transmitted through N transport streams. The first data includes first retransmitted data and first initial data. The first retransmitted data is the data of the first retransmitted data block, and the first initial data is the data of the second initial data block. The first retransmitted data is transmitted through M of the N transport streams, and the first initial data is transmitted through transport streams other than the M transport streams. N is a positive integer greater than 1, and M is a positive integer less than N. The first data block is determined based on the data transmitted in the M transport streams.

2. The method according to claim 1, characterized in that, The method further includes: Receive first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmitted data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmitted data and the identifier of the second data block corresponding to the first initial data.

3. The method according to claim 1 or 2, characterized in that, The method further includes: Receive third information, which indicates that the first data includes initial transmission data and retransmission data.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Receive fourth information, which is used to indicate the modulation and coding scheme (MCS) corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: The fifth information is received, which is used to indicate the redundant version RV corresponding to the first retransmitted data and the RV corresponding to the first initial data.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Send a sixth message, which includes a first confirmation message and a second confirmation message. The first confirmation message indicates whether the first data block was successfully received, and the second confirmation message indicates whether the second data block was successfully received; or... The first confirmation information is used to indicate whether each code block group (CBG) included in the first data block has been successfully received, and the second confirmation information is used to indicate whether each CBG included in the second data block has been successfully received.

7. The method according to any one of claims 1 to 6, characterized in that, Before receiving the first data on the first time-frequency resource, the method further includes: Send a seventh message, the seventh message indicating the signal-to-interference-noise ratio (SINR) of the demodulated signal corresponding to each transport stream used to transmit the second initial data, the second initial data being the data of the first data block in the initial transmission; The SINR of the demodulated signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used to transmit the first retransmission data.

8. A communication method, characterized in that, Applied to a second communication device, including: First data is transmitted on a first time-frequency resource. The first data is transmitted through N transport streams. The first data includes first retransmission data and first initial transmission data. The first retransmission data is the data of the first retransmitted data block, and the first initial transmission data is the data of the second initial transmission data block. The first retransmission data is transmitted through M of the N transport streams, and the first initial transmission data is transmitted through transport streams other than the M transport streams. N is a positive integer greater than 1, and M is a positive integer less than N.

9. The method according to claim 8, characterized in that, The method further includes: Send first information and second information, wherein the first information is used to indicate M of the N transport streams used to transmit the first retransmitted data, and the second information is used to indicate the identifier of the first data block corresponding to the first retransmitted data and the identifier of the second data block corresponding to the first initial data.

10. The method according to claim 8 or 9, characterized in that, The method further includes: Send a third message, which indicates that the first data includes both initial transmission data and retransmission data.

11. The method according to any one of claims 8 to 10, characterized in that, The method further includes: Send a fourth message, which is used to indicate the modulation and coding scheme (MCS) corresponding to the first retransmitted data and the MCS corresponding to the first initial transmitted data.

12. The method according to any one of claims 8 to 11, characterized in that, The method further includes: Send a fifth message, which is used to indicate the redundant version RV corresponding to the first retransmitted data and the RV corresponding to the first initial transmitted data.

13. The method according to any one of claims 8 to 12, characterized in that, The method further includes: Receive a sixth message, which includes a first confirmation message and a second confirmation message. The first confirmation message indicates whether the first data block was successfully received, and the second confirmation message indicates whether the second data block was successfully received; or... The first confirmation information is used to indicate whether each code block group (CBG) included in the first data block has been successfully received, and the second confirmation information is used to indicate whether each CBG included in the second data block has been successfully received.

14. The method according to any one of claims 8 to 13, characterized in that, Before transmitting the first data on the first time-frequency resource, the method further includes: Receive seventh information, the seventh information indicating the signal interference noise ratio (SINR) of the demodulated signal corresponding to each transport stream used to transmit the second initial data, the second initial data being the data of the first data block in the initial transmission; The SINR of the demodulated signal corresponding to each transport stream is used to determine the M transport streams among the N transport streams used to transmit the first retransmission data.

15. A communication device, characterized in that, It includes a module for performing the method as described in any one of claims 1 to 7; or, it includes a module for performing the method as described in any one of claims 8 to 14.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a program or instructions that, when executed, cause the method as claimed in any one of claims 1 to 7 to be implemented; or cause the method as claimed in any one of claims 8 to 14 to be implemented.

17. A computer program product, characterized in that, The computer program product includes a computer program that, when run, causes the method as described in any one of claims 1 to 7 to be implemented; or causes the method as described in any one of claims 8 to 14 to be implemented.

18. A communication device, characterized in that, It includes at least one processor, which implements the method as claimed in any one of claims 1 to 7, or the method as claimed in any one of claims 8 to 14, by executing a computer program or instructions in memory.

19. A chip, characterized in that, The chip includes at least one processor and a communication interface coupled to the at least one processor. The at least one processor is configured to run a computer program or instructions to implement the method as described in any one of claims 1 to 7, or to implement the method as described in any one of claims 8 to 14. The communication interface is configured to communicate with other modules outside the chip.

Images