WO2021017792A1 - 一种反馈信息的传输方法及终端装置 - Google Patents

一种反馈信息的传输方法及终端装置 Download PDF

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Publication number
WO2021017792A1
WO2021017792A1 PCT/CN2020/101450 CN2020101450W WO2021017792A1 WO 2021017792 A1 WO2021017792 A1 WO 2021017792A1 CN 2020101450 W CN2020101450 W CN 2020101450W WO 2021017792 A1 WO2021017792 A1 WO 2021017792A1
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Prior art keywords
feedback information
terminal device
data packet
information
piece
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PCT/CN2020/101450
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English (en)
French (fr)
Inventor
张锦芳
苏宏家
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华为技术有限公司
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Publication of WO2021017792A1 publication Critical patent/WO2021017792A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • This application relates to the field of communication technology, and in particular to a method and terminal device for transmitting feedback information.
  • V2X terminal devices In the vehicle-to-everything (V2X) communication mode, data transmission between V2X terminal devices can be carried out through sidelink (SL).
  • SL sidelink
  • PSFCH physical sidelink feedback channel
  • HARQ hybrid automatic repeat request
  • V2X terminal device A sends data to V2X terminal device B. If V2X terminal device B fails to decode the data, it sends a HARQ non-acknowledgement (HARQ-NACK) message via PSFCH. After receiving the HARQ-NACK message, the data is retransmitted.
  • HARQ-NACK HARQ non-acknowledgement
  • the V2X terminal device B If the V2X terminal device B successfully decodes the data, it sends a HARQ acknowledgement (HARQ-ACK) message through the PSFCH, and when the V2X terminal device A receives the HARQ-ACK message, it determines that the data does not need to be retransmitted.
  • HARQ-ACK HARQ acknowledgement
  • a terminal device can communicate with multiple other terminal devices in one or more time slots, that is, a terminal device can receive data from one or more terminal devices in one or more time slots.
  • a terminal device can receive data from one or more terminal devices in one or more time slots.
  • the embodiments of the present application provide a method for transmitting feedback information and a terminal device, so that the terminal device can send or receive feedback information reasonably.
  • a method for transmitting feedback information includes that after a first terminal device receives at least two data packets on a side link, the first terminal device may respond to data packets for the at least two data packets. Priorities of at least two feedback information, sending at least one feedback information, the at least one feedback information belongs to the at least two feedback information.
  • the terminal device may determine to send one or more feedback information of the multiple feedback information according to the priority of the multiple feedback information corresponding to the multiple data packets.
  • a terminal device can perform HARQ feedback on multiple data packets.
  • sending feedback information according to priority can reduce the transmission delay of high-priority services, and can improve the resource utilization of side links.
  • the sending of the at least one feedback information by the first terminal device may include but not limited to the following two ways:
  • the feedback information with the highest priority among the at least two feedback information is sent on a time domain unit
  • the first terminal device sends K pieces of feedback information of the at least two pieces of feedback information in the time domain unit, and the K pieces of feedback information are the ones of the at least two pieces of feedback information in descending order of priority.
  • K is an integer greater than 1.
  • the first terminal device can send the at least one feedback information in multiple ways, which can increase the flexibility of the solution.
  • the priority of at least two feedback messages can be determined in the following way:
  • the first terminal device may receive at least one piece of control information corresponding to the at least two data packets, and each piece of control information in the at least one piece of control information includes first indication information corresponding to the at least one data packet, and The first indication information is used to indicate the priority of at least one feedback information corresponding to the at least one data packet.
  • the first terminal device can determine the priority of each feedback information according to the first indication information, so that a data packet with a higher priority can receive the feedback information in time, and the implementation is simple.
  • the at least two data packets can be divided into a first partial data packet and a second partial data packet according to whether the first terminal device successfully decodes the data packet, and the first partial data packet includes the successfully decoded data packet ,
  • the second part of data packets includes data packets that have not been successfully decoded.
  • the at least two pieces of feedback information can also be divided into a first part of feedback information and a second part of feedback information, where the first part of feedback information is at least one piece of feedback information for the first part of data packets, and the second part of feedback information is For at least one piece of feedback information of the second part of the data packet, the priority of the first part of the feedback information is higher than the priority of the second part of the feedback information.
  • the first terminal device can give priority to the feedback of successfully decoded data packets, which can avoid the problem of resource waste caused by the second terminal device retransmitting the successfully decoded data packets, and can improve resource utilization rate.
  • the at least two data packets can be divided into a third part data packet and a fourth part data packet according to whether the received data packet is the last retransmitted data packet.
  • the last retransmitted data packet, the fourth part of the data packet includes the last retransmitted data packet.
  • the at least two pieces of feedback information can also be divided into a third part of feedback information and a fourth part of feedback information.
  • the third part of feedback information is at least one piece of feedback information for the third part of data packets, and the fourth part of feedback information
  • the priority of the third part of feedback information is higher than the priority of the fourth part of feedback information.
  • the first terminal device preferentially feedbacks data packets that are not retransmitted for the last time, thereby improving resource utilization.
  • the at least two data packets can be divided into a fifth part data packet and a sixth part data packet according to whether the received data packet comes from the first type terminal device or the second type terminal device.
  • Part of the data packets are from the first type of terminal device
  • the sixth part of the data packets are from the second type of terminal device.
  • Each terminal device of the first type of terminal device has not received the feedback information sent by the first terminal device.
  • the number of times is greater than or equal to the first threshold, and the number of times each terminal device in the second type of terminal device has not received the feedback information sent by the first terminal device is less than the first threshold.
  • the at least two pieces of feedback information can also be divided into a fifth part of feedback information and a sixth part of feedback information.
  • the fifth part of feedback information is at least one piece of feedback information for the fifth part of data packets
  • the sixth part of feedback information For at least one piece of feedback information for the sixth part of the data packet, the priority of the fifth part of feedback information is higher than the priority of the sixth part of feedback information.
  • the terminal device Because if a certain terminal device fails to receive feedback information multiple times, it will determine that the wireless link fails, thereby triggering the wireless link failure processing flow. Therefore, in the above technical solution, in order to reduce the amount of data packet transmission as much as possible If the terminal device produces the above-mentioned misjudgment, it can give priority to feedback to the first type of terminal device.
  • the priority of the at least two feedback information can also be determined in other ways, and the above four methods can also be combined to determine the priority of the at least two feedback information, which will not be repeated here.
  • the first terminal device may first determine the transmit power of each feedback information in the at least one feedback information.
  • the reflected power of each feedback information is the maximum transmit power and the corresponding feedback information.
  • the product of the allocation ratio, the allocation ratio is determined according to the priority of the corresponding feedback information, and the maximum transmission power is pre-configured or configured by the network device or determined according to the path loss of the downlink. Then, the first terminal device sends the corresponding feedback information according to the transmission power of each feedback information.
  • the transmission power of the corresponding feedback information is determined according to the priority, and higher transmission power can be allocated to the feedback information with a higher priority, thereby increasing the priority. High-level feedback information transmission reliability.
  • the first terminal device After the first terminal device receives at least two data packets on the side link, if the first terminal device determines the first data packet from the at least two data packets, the first If the data packet is a retransmitted data packet, and the process number carried in the first data packet is the same as the second data packet received and successfully decoded before the first data packet, the first terminal device discards the first data package.
  • a method for transmitting feedback information is provided.
  • the second terminal device can receive data packets for the at least two data packets. At least one feedback information of at least one data packet in.
  • the second terminal device may receive multiple pieces of feedback information corresponding to each of the at least two data packets, or may receive feedback information corresponding to the at least two data packets.
  • One piece of feedback information of a packet can also receive at least one piece of feedback information for some of the at least two data packets, which can increase the flexibility of receiving feedback information.
  • a certain piece of feedback information is feedback information for at least two data packets, the utilization of resources can be improved.
  • the second terminal device may send at least one piece of control information corresponding to the at least two data packets, and each piece of control information in the at least one piece of control information includes first indication information, and the first indication The information is used to indicate the priority of at least one feedback information corresponding to the at least one data packet.
  • the second terminal device can indicate the priority of the feedback information corresponding to the data packet through the control information, which is simple to implement.
  • a terminal device in a third aspect, includes a processor for implementing the method executed by the first terminal device in the first aspect.
  • the terminal device may also include a memory for storing program instructions and data.
  • the memory is coupled to the processor, and the processor can call and execute the program instructions stored in the memory to implement any method executed by the first terminal device in the first aspect.
  • the terminal device may further include a transceiver, and the transceiver is used for the terminal device to communicate with other devices.
  • the other device is a second terminal device.
  • an embodiment of the present application provides a terminal device, including: a transceiving unit, configured to receive at least two data packets on the side link; a processing unit, configured to control the priority of the at least two feedback information
  • the transceiver unit sends at least one piece of feedback information, the at least one piece of feedback information belongs to the at least two pieces of feedback information, and the at least two pieces of feedback information are feedback information for the at least two data packets.
  • the terminal device provided in the fourth aspect can be used to execute the method corresponding to the first terminal device in the first aspect.
  • the terminal device provided in the fourth aspect can be used to execute the method corresponding to the first terminal device in the first aspect.
  • the terminal device provided in the fourth aspect please refer to the foregoing embodiments, and will not be omitted here. Repeat.
  • a terminal device in a fifth aspect, includes a processor for implementing the method executed by the second terminal device in the second aspect.
  • the terminal device may also include a memory for storing program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory to implement any method executed by the second terminal device in the second aspect.
  • the terminal device may further include a transceiver, and the transceiver is used for the terminal device to communicate with other devices. Exemplarily, the other device is the first terminal device.
  • an embodiment of the present application provides a terminal device, including: a transceiver unit, configured to send at least two data packets on the side link under the control of the processing unit; and Under control, at least one piece of feedback information is received, where the at least one piece of feedback information is feedback information for at least one of the at least two data packets.
  • the terminal device provided in the sixth aspect can be used to execute the method executed by the second terminal device in the second aspect.
  • the terminal device provided in the sixth aspect can be used to execute the method executed by the second terminal device in the second aspect.
  • the terminal device provided in the sixth aspect please refer to the foregoing embodiments. Repeat it again.
  • an embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the first terminal device in the first aspect or the second terminal device in the second aspect Method of execution.
  • the embodiments of the present application also provide a computer program product, including instructions, which when run on a computer, cause the computer to execute the execution of the first terminal device in the first aspect or the second terminal device in the second aspect method.
  • an embodiment of the present application provides a chip system that includes a processor and may also include a memory, for implementing the method executed by the first terminal device in the first aspect or the second terminal device in the second aspect .
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • an embodiment of the present application provides a communication system.
  • the system includes the terminal device described in the third aspect and the fifth aspect, or includes the terminal device described in the fourth aspect and the sixth aspect.
  • Figure 1 is a network architecture diagram of examples of three application scenarios of V2X;
  • Fig. 2 is a flowchart of a terminal device sending HARQ information to a network device in the prior art
  • 3A is a schematic diagram of an example in which a terminal device sends HARQ information to two terminal devices in one time slot in an embodiment of the application;
  • 3B is a schematic diagram of another example in which a terminal device sends HARQ information to two terminal devices in one time slot in an embodiment of the application;
  • FIG. 4 is a schematic diagram of a network architecture applied by an embodiment of this application.
  • FIG. 5 is a flowchart of a method for transmitting feedback information provided by an embodiment of the application
  • FIG. 6 is a schematic diagram of an example of time-frequency resources where PSCCH is located, time-frequency resources where PSSCH is located, and time-frequency resources where PSFCH is located in an embodiment of the application;
  • FIG. 7 is a schematic structural diagram of an example of a terminal device provided in an embodiment of the application.
  • FIG. 8 is a schematic structural diagram of another example of a terminal device provided in an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of another example of a terminal device provided in an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of another example of a terminal device provided in an embodiment of this application.
  • FIG. 11 is a schematic block diagram of another example of a terminal device according to an embodiment of the application.
  • FIG. 12 is another schematic block diagram of another example of a terminal device according to an embodiment of the application.
  • FIG. 13 is still another schematic block diagram of another example of a terminal device provided by an embodiment of this application.
  • FIG. 14 is a schematic block diagram of an example of a communication system provided by an embodiment of this application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment.
  • it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal device may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • D2D device-to-device communication
  • V2X vehicle to everything
  • M2M/MTC Machine-to-machine/machine-type communications
  • IoT Internet of things
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, and computer-built mobile devices.
  • PCS personal communication service
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices introduced above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).
  • the terminal device of the present application may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units.
  • An on-board component, on-board chip, or on-board unit can implement the method of the present application.
  • Network devices such as access network (AN) equipment, such as base stations (e.g., access points), may refer to equipment that communicates with wireless terminal devices through one or more cells over the air interface in the access network
  • AN access network
  • base stations e.g., access points
  • a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU).
  • the base station can be used to convert received air frames and IP packets into each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network.
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network device may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution-advanced (LTE-A) system, Or it may also include the next generation node B (gNB) in the new radio (NR) system (also referred to as the NR system) of the fifth generation mobile communication technology (the 5th generation, 5G), or it may also It includes a centralized unit (CU) and a distributed unit (DU) in a cloud access network (cloud radio access network, Cloud RAN) system, which is not limited in this embodiment of the application.
  • LTE long term evolution
  • LTE-A long term evolution-advanced
  • gNB next generation node B
  • NR new radio
  • 5G fifth generation
  • 5G fifth generation
  • the network device may also include a core network device, but because the technical solutions provided in the embodiments of this application mainly involve access network devices, in the following text, unless otherwise specified, the “core network device” described refers to Core network device, and the described “network device” or “access network device” all refer to the access network device.
  • V2X is the interconnection between vehicles and the outside world. This is the foundation and key technology of future smart cars, autonomous driving, and smart transportation systems. As a major application of device-to-device (D2D) technology, V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology. For example, it is necessary to further reduce the access of V2X devices. Delay or feedback channel transmission problems.
  • D2D device-to-device
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and Several application requirements such as vehicle-to-network (V2N) communication interaction.
  • V2V refers to the communication between vehicles
  • V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers)
  • V2I refers to the communication between vehicles and network devices, such as RSU
  • V2N refers to the communication between the vehicle and the base station/network.
  • V2P can be used as a safety warning for pedestrians or non-motorized vehicles on the road.
  • vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing.
  • V2V can be used for information exchange and reminding between vehicles, and the most typical application is for the anti-collision safety system between vehicles.
  • V2N is currently the most widely used form of Internet of Vehicles. Its main function is to enable vehicles to connect to a cloud server through a mobile network and use the navigation, entertainment, or anti-theft application functions provided by the cloud server.
  • V2X data transmission method In V2X, it is mainly the communication between the terminal device and the terminal device.
  • the current standard protocol supports broadcast mode, multicast mode, and unicast mode.
  • the broadcast mode means that the terminal device as the sender uses the broadcast mode to send data.
  • Multiple terminal device ends can receive sidelink control information (SCI) from the sender or carried on the side link Data information on the sidelink shared channel (SSCH).
  • SCI sidelink control information
  • SSCH sidelink shared channel
  • the way to ensure that all terminal devices parse the control information from the sender is that the sender does not scramble the control information, or the sender uses a scrambling code known to all terminal devices to scramble the control information .
  • the multicast mode is similar to broadcast transmission.
  • the terminal device as the sender uses the multicast mode for data transmission, and a group of terminal devices can analyze SCI or SSCH.
  • the unicast mode is that one terminal device sends data to another terminal device, and other terminal devices do not need or cannot parse the data.
  • a universal user network interface (user to network interface universal, Uu) is an interface used for wireless communication between a terminal device and a network device, and may also be referred to as a Uu port or a Uu interface for short.
  • Sidelink which can also be referred to as side link, side link, etc.
  • the embodiment of the application does not limit this name.
  • the side link is a link for data communication between multiple terminal devices that perform V2X communication.
  • the side link is a link for data communication between multiple terminal devices that perform D2D communication.
  • the side link may be SSCH, and SSCH may include physical sidelink shared channel (PSSCH), narrow-band physical sidelink shared channel (NPSSCH), or Including other channels, there is no restriction here.
  • PSSCH physical sidelink shared channel
  • NPSSCH narrow-band physical sidelink shared channel
  • Including other channels there is no restriction here.
  • Time domain unit which can be a radio frame, a subframe, a slot, a mini slot, or an orthogonal frequency division multiplexing (OFDM) symbol (symbol) It can also be a unit composed of multiple radio frames or multiple subframes or multiple time slots or multiple mini-slots or multiple OFDM symbols aggregation.
  • one radio frame may include multiple subframes, one subframe may include one or more time slots, and one time slot may include at least one symbol.
  • one radio frame may include multiple time slots, and one time slot may include at least one symbol.
  • one OFDM symbol may also be referred to as one symbol for short.
  • a sub-channel is the smallest unit of frequency domain resources occupied by a physical side-line shared channel.
  • a sub-channel may include one or more resource blocks (RB).
  • the bandwidth of the wireless communication system in the frequency domain may include multiple RBs.
  • the included PRBs may be 6, 15, 25, 50, etc.
  • one RB can include several sub-carriers.
  • one RB includes 12 sub-carriers, where each sub-carrier interval can be 15 kHz.
  • other sub-carrier intervals can also be used, such as 3.75 kHz. , 30kHz, 60kHz or 120kHz sub-carrier spacing, there is no limitation here.
  • multiple refers to two or more than two. In view of this, “multiple” can also be understood as “at least two” in the embodiments of this application. "At least one” can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, including at least one of A, B and C, then the included can be A or B or C or A and B or A and C or B and C or A and B and C.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects.
  • a wireless communication system for example, an LTE system or an NR system
  • data transmission is performed between a terminal device and a network device through a Uu interface.
  • the terminal device receives the downlink data sent by the network device through the Uu interface, it will send HARQ information to the network device through the Uu interface. For example, if the terminal device successfully decodes the downlink data, the terminal device sends HARQ-ACK information to the network device through the Uu interface.
  • the network device receives the HARQ-ACK information, it confirms that the terminal device has successfully received the data, so that it is not used. Retransmit.
  • the terminal device If the terminal device fails to successfully decode the downlink data, the terminal device sends HARQ-NACK information to the network device through the Uu interface. When the network device receives the HARQ-NACK information sent by the terminal device, it confirms that the terminal device has not successfully decoded the data. If the downlink data does not reach the maximum number of retransmissions, the downlink data is sent to the terminal device again until the terminal device successfully decodes the downlink data or reaches the maximum number of retransmissions.
  • the HARQ-ACK information may also be referred to as ACK information for short, and the HARQ-NACK information may also be referred to as NACK information for short.
  • FIG. 2 is a flowchart of the terminal device sending HARQ information to the network device.
  • the network device sends configuration information to the terminal device, and the terminal device receives the configuration information.
  • the configuration information is used to indicate the maximum number of HARQ retransmissions of the terminal device, and the frequency domain and code domain resources for sending HARQ feedback information.
  • the code domain resources may be used sequences or sequence cyclic shift values.
  • the configuration information is also used to indicate the time interval between the terminal device receiving downlink data on the Uu interface and sending HARQ information.
  • the configuration information indicates that it passes Uu in time slot n+4.
  • the interface sends HARQ information.
  • time slot n can be understood as the time slot for the terminal device to receive the downlink data
  • time slot n+4 can be understood as the 4 time slots after the time slot in which the downlink data is received, sending HARQ information to the network device.
  • the network device sends downlink data, and the terminal device receives the downlink data.
  • the network device sends downlink data to the terminal device in time slot 0, and the terminal device receives the downlink data in time slot 0.
  • the terminal device sends HARQ information to the network device, and the network device receives the HARQ information.
  • the terminal device determines that it needs to send HARQ information to the network device through the Uu interface in time slot 4. If the terminal device successfully decodes the downlink data, the terminal device sends ACK information to the network device through the Uu interface in time slot 4; otherwise, the terminal device sends NACK information to the network device through the Uu interface in time slot 4.
  • a Uu interface refers to the communication interface between a terminal device and a network device, it can be understood that there is a one-to-one correspondence between the Uu interface and the network device, that is, the terminal device can only communicate with one network through a certain Uu interface. Device communication, therefore, when the terminal device communicates with the network device through the Uu interface, in the communication process, the terminal device can only send HARQ information to one network device in one time slot.
  • a terminal device can perform unicast communication with multiple other terminal devices in one or more time domain units (for example, a time slot), or one terminal device can also perform unicast communication with other terminal devices. It is possible to perform multicast communication with multiple different terminal devices in one or more time domain units. In this case, a terminal device can receive multiple data from one or more terminal devices in the same time domain unit, and therefore, the terminal device may need to send data to the multiple data on the same time domain unit. Multiple HARQ information.
  • the network device configures the PSFCH resource for transmitting HARQ information for the terminal device as follows: configure one resource for transmitting the PSFCH every 3 time slots.
  • Each PSFCH and the corresponding PSSCH used for data transmission occupy the same frequency domain resources.
  • UE1 and UE2 respectively send data packets to UE0 in the same time slot and on different subchannels. For example, UE1 and UE2 respectively send data packets to UE0 in time slot 0, UE1 occupies subchannel 1 in time slot 0 and sends data packet 1 to UE0, and UE2 occupies subchannel 2 in time slot 0 to send data packet 2 to UE0. When UE0 receives the data packet 1 and data packet 2, it sends HARQ information to UE1 and UE2 respectively in time slot 3.
  • UE0 occupies subchannel 1 in time slot 3 to send the HARQ corresponding to data packet 1 to UE1 , And occupy subchannel 2 in time slot 3 to send HARQ 2 corresponding to data packet 2 to UE2.
  • HARQ1 and HARQ2 may be ACK information or NACK information, which is specifically determined according to the decoding result of data packet 1 and data packet 2 by UE0.
  • UE3 and UE4 respectively send data packets to UE0 in different time slots and on different subchannels. For example, UE3 occupies subchannel 1 to send data packet 3 to UE0 in time slot 0, UE4 occupies subchannel 2 to send data packet 4 to UE0 in time slot 1, and occupies subchannel 3 to send data packet to UE0 in time slot 2 5. After UE0 receives the data packet 3 to data packet 5, it occupies different subchannels in time slot 3 and sends HARQ information to UE3 and UE4.
  • UE0 occupies subchannel 1 in time slot 3 to send HARQ 3 corresponding to data packet 3 to UE3, and in time slot 3 respectively occupies subchannel 2 and subchannel 3 to send to UE4 corresponding to data packet 4 and data packet 5, respectively HARQ 4 and HARQ 5.
  • the time domain resources occupied by PSFCH and PSSCH are one time slot, but in practical applications, each channel may only occupy one or more of a time slot. Symbols.
  • the network device also needs to configure other channels for the terminal device. For example, a physical sidelink control channel (PSCCH) can be configured, which is not shown in FIGS. 3A and 3B.
  • PSCH physical sidelink control channel
  • the time-frequency resources occupied by each channel in FIG. 3A and FIG. 3B are only for illustration, and should not be understood as a restriction on these channels.
  • the terminal device when the terminal device transmits data to the network device through the Uu interface, the terminal device can only send HARQ information to one network device in a time slot. Therefore, the HARQ information transmission process shown in Figure 2 cannot be applied. In a scenario where a terminal device transmits multiple HARQ information in one slot. In this case, there is currently no solution to how the terminal device should send HARQ information.
  • an embodiment of the present application provides a method for transmitting feedback information, so that the terminal device can reasonably perform HARQ feedback.
  • V2X scenarios which may be NR V2X scenarios or LTE V2X scenarios, etc., or may also be applied to other D2D scenarios or other communication systems, which are not limited here.
  • FIG. 4 is a network architecture applied in the embodiment of this application.
  • Figure 4 includes a network device and four terminal devices, namely terminal device 1 to terminal device 4. These four terminal devices can all be under the coverage of the network device, or only some of the terminal devices can be in the network device. For example, the terminal device 1 is under the coverage of the network device, and the terminal device 2 to the terminal device 4 are not under the coverage of the network device. These four terminal devices can also communicate through the side link, or the four Each terminal device may also be under the coverage of different network devices, or none of the four terminal devices may be under the coverage of the network device.
  • Fig. 4 takes as an example that these four terminal devices are all under the coverage of one network device shown in Fig. 4. Of course, the number of terminal devices in FIG. 4 is just an example. In practical applications, a network device can provide services for multiple terminal devices.
  • the network device in FIG. 4 is, for example, an access network device, such as a base station, or may also be an RSU, etc.
  • the base station is taken as an example in FIG. 4.
  • the access network equipment corresponds to different equipment in different systems.
  • 4G 4th generation
  • 5G 5th generation
  • the terminal device in FIG. 4 may be a V2X terminal device, such as a vehicle-mounted terminal device or a vehicle as an example, but the terminal device in the embodiment of the present application is not limited to this.
  • FIG. 5 is a flowchart of a method for feedback information provided by an embodiment of this application.
  • the method is executed by a first terminal device and at least one second terminal device as an example.
  • the first terminal device may be any one of the four terminal devices shown in FIG. 4, and the at least one second terminal device may be In addition to the first terminal device other terminal devices.
  • the first terminal device may be the terminal device 1 shown in FIG. 4, and the at least one second terminal device may be the terminal device 2 to the terminal device 4 shown in FIG. 4; or, the first terminal The device may be the terminal device 1 shown in FIG. 4, and the at least one terminal device may be a part of the terminal device 2 to the terminal device 4 shown in FIG. 4 (for example, the terminal device 2 and the terminal device 3).
  • the first terminal device is the terminal device 1 shown in FIG. 4
  • at least one second terminal device is the terminal device 2 to the terminal device 4
  • the terminal device 1 to the terminal device 4 are all covered by the network device.
  • the network device sends configuration information, and the first terminal device and at least one second terminal device receive the configuration information.
  • the configuration information is used to indicate the time-frequency resource where the side link of the terminal device is located.
  • the time-frequency resource where the side link is located may be understood as the time-frequency resource used when the first terminal device and at least one second terminal device perform V2X communication.
  • the configuration information may be radio resource control (radio resource control, RRC) signaling, or media access control (media access control, MAC) signaling, of course, it may also be other signaling, which is not limited here.
  • RRC radio resource control
  • MAC media access control
  • the at least two second terminal devices are respectively marked as the first second terminal device and the second second terminal device in FIG. 5.
  • the configuration information may indicate a resource pool, which is a resource set consisting of time domain resources (including multiple time domain units) and frequency domain resources (including multiple subchannels).
  • Each time-frequency resource in the resource pool can be used for V2X communication.
  • the terminal device can select one or more time-frequency resources from the resource pool for V2X communication.
  • the configuration information may include the time-frequency resource where the PSCCH is located, the time-frequency resource where the PSSCH is located, and the time-frequency resource where the PSFCH is located.
  • the time domain resources where the PSSCH is indicated in the configuration information may be time slot 0 to time slot 9, and the frequency domain resources where the PSSCH is located are subchannel 0 to subchannel 9.
  • the frequency domain resources of the PSCCH are different from the frequency domain resources of the PSSCH (it can also be the same.
  • the frequency domain resources of the PSCCH are different from the frequency domain resources of the PSSCH as an example), and the time domain resources of the PSCCH are time slots 0 to The first and second symbols after the first automatic gain control (AGC) symbol of each time slot in time slot 9, PSFCH is located in time slot 0, time slot 3, and time slot 6.
  • the symbol before the last gap symbol of the gap ie symbol 12). For example, if the first AGC symbol of each slot is symbol 0, the time domain resources occupied by PSCCH are symbol 1 and symbol 2, and the last gap symbol of each slot is the last symbol, then the time occupied by each PSFCH The domain resource is symbol 12.
  • each time slot includes 14 symbols as an example for illustration.
  • a time slot can include 7 symbols or other numbers of symbols, which is not described here. limit.
  • the time-frequency resource where the side link is located can also be obtained in other ways.
  • it may be pre-configured, for example, including operation administration and maintenance (OAM) configuration, or pre-configured in each terminal device.
  • OAM operation administration and maintenance
  • FIG. 6 only the network device sending the configuration information to each terminal device is taken as an example.
  • the first terminal device establishes a side link with each second terminal device.
  • the first terminal device sends the configuration information of the side link to at least one second terminal device to establish the side link between the first terminal device and each second terminal device through the configuration information.
  • each terminal device send configuration information to the first terminal device, which is not limited here.
  • the configuration information includes enabling HARQ function, minimum feedback time interval, etc.
  • the time-frequency resource where the side link is located is shown in Figure 6 as an example.
  • At least one second terminal device sends at least two data packets to the first terminal device, and the first terminal device receives the at least two data packets.
  • the first terminal device When the first terminal device establishes a side link with each second terminal device, the first terminal device can send a data packet to the second terminal device on the side link, or the second terminal device can also The data packet is sent to the first terminal device through the side link.
  • the second terminal device may use unicast or multicast to send data packets to the first terminal device. In the following, the second terminal device uses unicast to send data packets to the first terminal device as an example.
  • the multiple second terminal devices may occupy different sub-channels to send data packets in the same time slot.
  • the terminal device 2 to the terminal device 4 may respectively occupy the subchannel 1 to the subchannel 3 to transmit the data packet 1 to the data packet 3 to the terminal device 1 in the time slot 0.
  • the multiple second terminal devices may also occupy different sub-channels in different time slots to send data packets.
  • terminal device 2 may occupy subchannel 1 in time slot 0 and send data packet 1 to terminal device 1
  • terminal device 3 may occupy subchannel 2 in time slot 1 and send data packet 2 to terminal device 1.
  • the time-frequency resources occupied by the multiple second terminal devices to send data packets are not limited.
  • terminal device 2 occupies subchannel 1 in time slot 0 to send data packet 1 to terminal device 1
  • terminal device 3 occupies subchannel 2 in time slot 0 to send data packet 2 to terminal device 1.
  • subchannel 2 and subchannel 3 are respectively occupied to send data packet 3 and data packet 4 to terminal device 1
  • terminal device 4 occupies subchannel 3 in time slot 2 to send data packet 5 to terminal device 1 as an example.
  • the terminal device 1 receives the data packets 1 to 5 on the corresponding time-frequency resources.
  • the first terminal device generates feedback information corresponding to each data packet.
  • the first terminal device When the first terminal device receives the data packet sent by each second terminal device, it decodes each data packet, and generates feedback corresponding to each data packet according to the decoding result of each data packet information.
  • the feedback information can be understood as HARQ information. If in a V2X scenario, terminal devices can also feed back received data packets through other communication technologies, the feedback information can also be other information, which is not limited here. In the following, it is assumed that the feedback information is HARQ information as an example.
  • the first terminal device generating HARQ information according to the decoding result may include but not limited to the following three methods:
  • the first generation method is to generate ACK information and NACK information according to the decoding result of the data packet. That is to say, if the first terminal device successfully decodes a certain data packet, the HARQ information corresponding to the data packet is generated as ACK information; if the first terminal device fails to decode the data packet, it generates the data packet The corresponding HARQ information is NACK information.
  • the second generation method only the successfully decoded data packets are fed back. That is to say, if the first terminal device successfully decodes a certain data packet, the HARQ information corresponding to the data packet is generated as ACK information; if the first terminal device fails to decode the data packet, it does not generate the corresponding data packet. Feedback information corresponding to the package.
  • the third generation method only feedbacks the unsuccessfully decoded data packets. That is, if the first terminal device does not successfully decode the data packet, the HARQ information corresponding to the data packet is generated as NACK information; if the first terminal device successfully decodes a certain data packet, it does not generate a data packet corresponding to the data packet. Feedback information corresponding to the package.
  • the first terminal device does not generate the feedback information corresponding to the data packet. It can also be understood that after the first terminal device generates the feedback information corresponding to the data packet , Determine that the feedback information is different from the type of feedback information to be allowed to be sent (the type of feedback information may include the confirmation type or the denial type), so as to determine that the feedback information is not to be sent.
  • the feedback information corresponding to the unsuccessfully decoded data packet is generated as NACK information, but the first terminal device will only feedback the successfully decoded data packet, that is, it can only send ACK information, therefore, the first terminal device determines that the NACK information does not need to be sent.
  • the terminal device 1 uses the first method to generate HARQ information. After receiving data packet 1 to data packet 5, terminal device 1 successfully decodes data packet 1 to data packet 3, thereby respectively generating HARQ information 1 to HARQ information 3 corresponding to data packet 1 to data packet 3 (where each Each HARQ information is ACK information); and, the terminal device 1 has not successfully decoded data packet 4 and data packet 5, thereby generating HARQ information 4 and HARQ information 5 corresponding to data packet 4 and data packet 5 (each of them HARQ information is NACK information).
  • the first terminal device sends at least one piece of feedback information according to the priority of the at least two pieces of feedback information, and the second terminal device receives the at least one piece of feedback information.
  • the second terminal device may be one of the aforementioned at least one second terminal device.
  • the first terminal device sends the at least one feedback information to the first second terminal device as an example.
  • the at least one piece of feedback information belongs to at least one piece of feedback information of the first terminal device for the received at least two data packets. It can be understood that, after the first terminal device generates feedback information corresponding to each data packet, the first terminal device will send part of the feedback information or all of the feedback information among the multiple feedback information.
  • the priority of the feedback information may be determined in any one or more of the following four ways.
  • the priority of the feedback information corresponding to the data packet can be determined according to whether the first terminal device successfully decodes the data packet.
  • the first terminal device may divide the received data packet into two parts according to whether the data packet is successfully decoded, the first part of the data packet includes the successfully decoded data packet, and the second part of the data packet includes the unsuccessful decoded data packet. Code packet.
  • the first terminal device determines that, among the at least two pieces of feedback information, the priority of the feedback information for the first part of the data packet is higher than the priority of the feedback information for the second part of the data packet.
  • the terminal device 1 when the terminal device 1 successfully decodes the data packet 1 to data packet 3, and fails to decode the data packet 4 and data packet 5, it is determined that each of the at least one feedback information corresponding to the data packet 1 to data packet 3
  • the priority of each feedback information is higher than the priority of each feedback information in at least one feedback information corresponding to data packet 4 and data packet 5, that is, the priority of each HARQ information in HARQ information 1 to HARQ information 3 is higher than HARQ information 4 or HARQ information 5.
  • the terminal device 1 may determine that the priority of each HARQ information in HARQ information 1 to HARQ information 3 is priority 1, and the priority of HARQ information 4 and HARQ information 5 is priority 2, wherein priority 1 is higher than Priority 2.
  • the first terminal device can give priority to the feedback of successfully decoded data packets, which can avoid the problem of resource waste caused by the second terminal device retransmitting the successfully decoded data packets, and can improve resource utilization rate.
  • the priority of the feedback information corresponding to the data packet can be determined according to the size of the data packet.
  • the first terminal device may preset the correspondence between the priority and the size of the data packet, and then determine the priority of each feedback information according to the correspondence.
  • the corresponding relationship may be: if the size of the data packet is greater than 5 megabytes (megabytes, MB), the priority of the feedback information of the data packet is priority 1; if the size of the data packet is greater than 2MB and less than or equal to 5MB, the priority of the feedback information of the data packet is priority 2; if the size of the data packet is less than or equal to 2MB, the priority of the feedback information of the data packet is priority 3.
  • priority 1 is higher than priority 2
  • priority 2 is higher than priority 3.
  • the terminal device 1 determines that the priority of HARQ information 1 to HARQ information 5 is priority 2, priority 2, and priority 2. , Priority 3 and Priority 3.
  • the first terminal device can feed back according to the size of the data packet, so that when the first terminal device can only send a part of the feedback information of the at least two feedback information, there is no data corresponding to the sent feedback information.
  • the packet is the smallest, so that the time-frequency resources occupied by the retransmission triggered by the failure of receiving the feedback information is the least, which can improve the resource utilization.
  • the priority of the feedback information corresponding to the data packet can be determined according to whether the data packet is the last retransmitted data packet.
  • step S505 the method in the embodiment of the present application further includes:
  • Each second terminal device sends first control information corresponding to the data packet, and the first terminal device receives the at least one piece of first control information.
  • the first control information may include redundancy version information, or may carry a process number (for example, HARQ process (process) ID) and a new data indicator (NDI).
  • the first terminal device may determine whether the data packet is the last retransmitted data packet according to one or more of the redundancy version information, the process number, and the NDI in the first control information.
  • the first terminal device may divide the received data packet into two parts according to whether the data packet is the last retransmitted data packet, for example, into a third part data packet and a fourth part data packet, Among them, the third part of data packets includes data packets that are not retransmitted the last time, and the fourth part of data packets includes data packets that are retransmitted the last time.
  • the first terminal device determines that, among the at least two pieces of feedback information, the priority of the feedback information for the third part of the data packet is higher than the priority of the feedback information for the fourth part of the data packet.
  • the terminal device 1 after the terminal device 1 receives data packets 1 to 5, it can obtain the number of retransmissions carried in each data packet according to the redundancy version information carried in the control information, and the redundancy version information , And determine whether the data packet is the last retransmitted data packet according to the redundant version information.
  • the terminal device 1 is configured with a maximum number of retransmissions (the maximum number of retransmissions may be preset by the terminal device 1, or may be configured by a network device, or may be determined in other ways), for example, the maximum retransmission times The number of passes is 4 times.
  • the terminal device 1 determines whether the maximum number of retransmissions is equal to the last time according to the value of the redundancy version information of each data packet, if it is determined to be equal to the last time according to the value of the redundancy version information of a certain data packet. For a large number of retransmissions, the terminal device 1 determines that the data packet is the last retransmitted data packet. For example, terminal device 1 determines that data packet 4 and data packet 5 are the last retransmitted data packets, and data packet 1 to data packet 3 are not the last retransmitted data packets, then terminal device 1 determines HARQ information The priority of 1-HARQ information 3 is higher than the priority of HARQ information 4 or HARQ information 5.
  • the terminal device 1 may record the number of times the same data packet is received. For example, the terminal device 1 can determine whether two data packets are the same data packet according to the process number (for example, HARQ process ID) corresponding to each data packet. When the process numbers of the two data packets are the same and new When the data indication information is not reversed, it is confirmed that the two data packets are the same data packet, and then the terminal device 1 records the number of times the same data packet is received. When the number of times of receiving a certain data packet reaches the maximum number of retransmissions, it is confirmed that the data packet is the last retransmitted data packet; otherwise, it is confirmed that the data packet is not the last retransmitted data packet.
  • the process number for example, HARQ process ID
  • the first terminal device preferentially feedbacks data packets that are not retransmitted for the last time, thereby improving resource utilization.
  • the first terminal device may also determine whether the data packet is a retransmitted data packet or a data packet transmitted for the first time according to the process number and the NDI.
  • the process number is the same as the data packet previously received and successfully decoded by the first terminal device, and the NDI of the data packet is not toggled (toggled)
  • the first terminal device determines that the data packet is a retransmitted data packet (ie, the first One packet).
  • the first terminal device may discard the data packet.
  • the first terminal device may not decode the first data packet, but it still needs to generate feedback information corresponding to the first data packet and determine the feedback information corresponding to the first data packet The priority of the user to determine whether to send the feedback information.
  • step S506 and the at least two data packets in step S503 can be sent separately or together.
  • step S503 and step S506 are respectively performed; when the first control information and at least two data packets are sent together, step S506 can be performed simultaneously with step S503, or, These two steps can be combined into one step.
  • step S506 is an optional step.
  • the first terminal device does not use the fifth determining method to determine the priority of the feedback information
  • the first terminal device does not need to determine the priority of the feedback information according to the control information corresponding to the data packet. Therefore, in FIG. 5, step S506 is shown with a dashed line to indicate that this step is an optional step.
  • the priority of the feedback information corresponding to the data packet can be determined according to the terminal device that sends the data packet.
  • the first terminal device may count the number of times it has not sent feedback information to other terminal devices.
  • the number of times that no feedback information is sent to other terminal devices refers to the number of feedback times in different feedback time slots, that is, if there is feedback on at least one data transmission in a feedback time slot, the number of feedback times is recorded once, and if there is no feedback, it is recorded once No feedback times, regardless of the number of data packets.
  • the terminal device 2 sends two data packets to the terminal device 1, and these two data packets are fed back in the same time slot. At this time, if the terminal device 1 does not send to the terminal device 2 or any of these two data packets For the feedback information corresponding to a data packet, the number of times that it has not sent feedback information to the terminal device 2 is recorded as one.
  • the first terminal device can classify the terminal devices that send data packets into two types according to the number of times it has not sent feedback information to other terminal devices.
  • the first type of terminal device includes the number of times that the first terminal device has not sent feedback information to it is greater than or For terminal devices equal to the first threshold, the second type of terminal device includes terminal devices to which the first terminal device has not sent feedback information less than the first threshold, or the first type of terminal device and the second type of terminal device are also It can be understood that the number of times each terminal device in the first type of terminal device has not received the feedback information sent by the first terminal device is greater than or equal to the first threshold, and each terminal device in the second type of terminal device has not received the first terminal device.
  • the number of feedback messages sent by a terminal device is less than the first threshold.
  • the first threshold may be preset or indicated by the network device. For example, the first threshold may be 10 times or 5 times, etc., which is not limited here.
  • the first terminal device divides the received data packet into two parts according to whether the terminal device sending each data packet belongs to the first type of terminal device or the second type of terminal device, for example, into the fifth part of the data packet and the first Six-part data packet, wherein the fifth part of the data packet is from the first type of terminal device, and the sixth part of the data packet is from the second type of terminal device.
  • the first terminal device determines that the priority of the fifth part of the feedback information for the fifth part of the data packet in the at least two feedback information is higher than the priority of the sixth part of the feedback information for the sixth part of the data packet.
  • the terminal device 1 determines HARQ information 1 to HARQ information 3
  • the priority of is higher than the priority of HARQ information 4 or HARQ information 5.
  • the terminal device Because if a certain terminal device fails to receive feedback information multiple times, it will determine that the wireless link fails, thereby triggering the wireless link failure processing flow. Therefore, in the above technical solution, in order to reduce the amount of data packet transmission as much as possible If the terminal device produces the above-mentioned misjudgment, it can give priority to feedback to the first type of terminal device.
  • the priority of the feedback information corresponding to the data packet may be determined according to the control information corresponding to the data packet.
  • step S505 the method in the embodiment of the present application further includes:
  • Each second terminal device sends second control information corresponding to the data packet, and the first terminal device receives the at least one piece of second control information.
  • each second control information includes first indication information, the first indication information corresponds to at least one data packet, and the first indication information is used to indicate at least one feedback corresponding to the at least one data packet The priority of the information.
  • the correspondence between the second control information and the data packet may be a one-to-one correspondence, that is, one piece of second control information is used to indicate the priority of the feedback information of one data packet.
  • the terminal device 2 sends three data packets, packet 2 to data packet 4, to the terminal device 1, the terminal device 2 can send the data packet at the same time (or before each packet)
  • the terminal device 1 sends a piece of second control information, that is, the terminal device 2 sends the data packet 2 and the second control information corresponding to the data packet 2 to the terminal device 1 at the same time, and then sends the data packet 3 and the data packet 3
  • the number of second control information sent by the terminal device is the same as the number of data packets to be sent.
  • the correspondence between the second control information and the data packets may also be a one-to-many correspondence, that is, one piece of second control information is used to indicate the priority of feedback information of multiple data packets. For example, if the terminal device 2 sends three data packets of data packet 2 to data packet 4 to the terminal device 1, the terminal device 2 can send a second control information to the terminal device 1 at the same time when the data packet 2 is sent.
  • the second control information is used to indicate the priority of the feedback information corresponding to data packet 2 to data packet 4. In this case, no matter how many data packets the terminal device needs to send, it only needs to send one second control information.
  • the second control information and the first control information in the third determining manner may be different control information or the same control information, which is not limited here.
  • control information may be sidelink control information (SCI) sent on the PSCCH.
  • SCI sidelink control information
  • a field is added to the SCI to indicate the priority of the feedback information corresponding to the data packet sent by the field.
  • control information may also be used to indicate the priority of the data packet sent, so that the first terminal device determines the priority of the corresponding feedback information according to the priority of the data packet.
  • PPPP ProSe per-packet priority
  • QoS quality of service
  • control information may also be carried in the header of the data packet. In this case, step S507 does not need to be executed.
  • the first terminal device After obtaining the control information corresponding to the data packet, the first terminal device determines the priority corresponding to each feedback information according to the first indication information in the control information. For example, the first indication information corresponding to data packet 1 indicates that the priority of HARQ information 1 corresponding to data packet 1 is priority 1, and the first indication information corresponding to data packet 2 indicates HARQ information 2 corresponding to data packet 2. The priority is priority 2, and so on, I will not list them all here.
  • the first terminal device may determine the priority of each feedback information according to the first indication information, so that a data packet with a higher priority can receive the feedback information in time.
  • step S507 and the at least two data packets in step S503 can be sent separately or together.
  • step S503 and step S507 are respectively performed; when the second control information and at least two data packets are sent together, step S507 can be performed simultaneously with step S503, or, These two steps can be combined into one step.
  • step S507 is an optional step.
  • step S507 is shown by a dotted line to indicate that this step is possible. Select steps.
  • multiple determination methods from the first to fifth determination methods described above may be combined to determine the priority of each feedback information.
  • the first determination method can be combined with the fourth determination method. Specifically, the first terminal device first determines the priority of the first part of the feedback information corresponding to the first part of the data packet is higher than the priority of the second part of the feedback information corresponding to the second part of the data packet according to the first determination method. Then, for the first part of the feedback information and the second part of the feedback information, the fourth determination method is used to determine the priority of the feedback information in each part of the feedback information. For example, for the first part of feedback information, the feedback information corresponding to the data packet from the first type of terminal device and the feedback information corresponding to the data packet from the second type of terminal device are determined from the first part of feedback information, and the first part The feedback information is divided into two sub-parts.
  • the first sub-part feedback information is feedback information corresponding to the data packet from the first type of terminal device
  • the second sub-part feedback information corresponds to the data packet from the second type of terminal device
  • the feedback information of the first sub-part is determined to have a higher priority than the feedback information of the second sub-part.
  • the terminal device 1 determines that HARQ information 1 to HARQ information 3 are the first part of feedback information, and HARQ information 4 and HARQ information 5 are the second part of feedback information, and then determines which of HARQ information 1 to HARQ information 3 is related to the first part of feedback information.
  • the feedback information corresponding to the data packet of the type terminal device for example, HARQ information 1 is the feedback information corresponding to the data packet from the first type terminal device, so that it is determined that the priority of HARQ information 1 is higher than HARQ information 2 or HARQ information 3. Priority.
  • determination methods can also be combined, for example, the first determination method, the second determination method, and the third determination method are combined, or the fourth determination method and the fifth determination method are combined , There is no restriction here.
  • the process of determining the priority of the feedback information is similar to the process in the foregoing example, and will not be described here.
  • the accuracy of the determined priority can be improved, so that the first terminal device can more accurately feedback the data packet.
  • the first terminal device After the first terminal device determines the priority of each feedback information, it determines to send at least one feedback information of the at least two feedback information according to the priority.
  • the first terminal device sends at least one piece of feedback information according to, including but not limited to the following two situations.
  • the first terminal device sends the feedback information with the highest priority among the at least two feedback information in a time domain unit.
  • the terminal device 1 determines that the priority order of HARQ information 1 to HARQ information 5 is: HARQ information 1>HARQ information 2>HARQ information 3>HARQ information 5>HARQ information 4. Then terminal device 1 determines to send HARQ information 1.
  • the terminal device 1 determines that the priority of each HARQ information in HARQ information 1 to HARQ information 3 is higher than the priority of HARQ information 4 and HARQ information 5, so that the terminal device 1 determines to transmit HARQ information 1.
  • the terminal device 1 may be selected randomly, or may also be in accordance with other rules, which may be based on the order of receiving data packets, selecting and sending one of the HARQ messages. For example, if the terminal device 1 sequentially receives the data packet 1 to the data packet 3, the terminal device 1 determines to transmit the HARQ information corresponding to the data packet 1, that is, the HARQ information 1.
  • the first terminal device sends K pieces of feedback information of the at least two pieces of feedback information in a time domain unit, and the K pieces of feedback information are the at least two pieces of feedback information in the order of priority from high to low K is an integer greater than 1.
  • the value of K may be pre-configured by the terminal device, or may also be instructed by the network device.
  • the value of K may be 3 or 4, etc., which is not limited here.
  • the terminal device 1 determines that the priority of each HARQ information in HARQ information 1 to HARQ information 3 is higher than the priority of HARQ information 4 and HARQ information 5. If the value of K is 3, the terminal device 1 Confirm to send HARQ information 1 to HARQ information 3.
  • the network device can configure the terminal device with the number of feedback information that it can support to send on the same time domain unit according to the capability information or other parameters of the terminal device, and the number of feedback information can be identified as K .
  • the network device may configure a different value of K for each terminal device, or it may configure the same value of K for different terminal devices, which is not limited here. If the value of K is 1, the terminal device can use the first determination method to send a feedback message, if the value of K is an integer greater than 1, the terminal device can use the second determination method to send at least one feedback message information.
  • the number of feedback information that each terminal device can support to send on the same time domain unit may also be determined by the terminal device itself, for example, it may be preset, which is not limited here.
  • the first terminal device may bundle or multiplex the feedback information of multiple data packets sent by the same second terminal device, and then send the binding Or feedback information after multiplexing.
  • the priority of the bound or multiplexed feedback information is determined according to the priorities of multiple pieces of feedback information bound or multiplexed. It should be noted that the bound or multiplexed feedback information is regarded as one piece of feedback information. Therefore, the bound or multiplexed feedback information will be used as one piece of feedback information to compare the priority with other feedback information, and then determine Whether to send.
  • the multiple pieces of feedback information are combined with the operation to obtain the bound feedback information.
  • the predetermined feedback information is NACK information, and only when each of the multiple feedback information is ACK information, the bound feedback information is ACK.
  • the priority of the multiplexed feedback channel may be the priority of the feedback information with the highest priority among the multiple pieces of feedback information, for example, multiplexing HARQ information 2 ⁇ HARQ information 4. Among them, HARQ information 2 has the highest priority, and the multiplexed feedback information has the same priority as HARQ information 2.
  • the priority determination method can also be determined according to the feedback information with the highest priority.
  • the bound feedback information or the multiplexed feedback information may also determine its corresponding priority and content according to other methods, and no examples are given here.
  • the first terminal device before the first terminal device sends at least one piece of feedback information, it also needs to determine the transmission power of each feedback information, and then send the corresponding feedback information according to the transmission power of each feedback information.
  • the manner of determining the transmission power of each feedback information may include but is not limited to the following multiple manners.
  • the first transmission power determination method :
  • the transmission power determined by the requirement, min ⁇ , ⁇ can calculate the minimum value of P CMAX, PSFCH, P DL_PL_PSFCH , that is, if the value of P CMAX, PSFCH is less than the value of P DL_PL_PSFCH , then the transmit power will take the value of P CMAX, PSFCH , otherwise, send The power takes the value of P DL_PL_PSFCH .
  • the second transmission power determination method is the second transmission power determination method
  • the first terminal device determines to send K pieces of feedback information, then the first terminal device first sorts the K pieces of feedback information according to the priority order. If the priority of the K feedback information is the same, the first terminal device may sort the K feedback information randomly or according to other methods. Then, the maximum transmission power Pmax used by the first terminal device to send feedback information is determined. The maximum transmission power Pmax may be configured by the network device, or pre-configured, or calculated by the first terminal device according to the Uu port downlink path loss, which is not limited here. Then, the first terminal device determines the transmission power of the first feedback information in the K feedback information. Specifically, the transmission power of the first feedback information is based on the maximum transmission power Pmax and the SL of the first terminal device.
  • the transmission power obtained by the link path loss is determined by the smaller value, that is, if the maximum transmission power Pmax is less than the transmission power obtained according to the SL link path loss of the first terminal device, the first feedback information is transmitted
  • the power is the maximum transmission power Pmax; otherwise, it is determined that the transmission power of the first feedback information is the transmission power obtained according to the SL link path loss of the first terminal device.
  • the remaining transmission power that is, the difference between the maximum transmission power and the transmission power of the first feedback message. If the remaining transmission power is not less than the preset value, then the remaining transmission power Set the power to the maximum transmission power Pmax, and use the aforementioned method of determining the transmission power of the first feedback message to determine the transmission power of the second feedback message, determine the remaining transmission power again, and then determine the subsequent feedback according to the remaining transmission power and the aforementioned method.
  • the preset value may be preset by the terminal device, and is not limited here.
  • the first terminal device determines to send K pieces of feedback information according to the priority of at least two pieces of feedback information, but when the transmission power of each feedback information is determined in the above manner, the first terminal device is determining the first After the transmission power of the feedback information, the remaining transmission power is less than the preset value. In this case, the first terminal device only transmits the feedback information with the highest priority among the K feedback information. That is, the feedback information sent by the first terminal device is determined according to the three factors of the priority of the at least two feedback information, the maximum transmission power, and the SL link path loss.
  • the first terminal device may evenly allocate the acquired maximum transmission power to the K pieces of feedback information, that is, the transmission power of each feedback channel is Pmax/K.
  • the maximum transmission power is the same as the maximum transmission power in the second transmission power determination method, which will not be repeated here.
  • the fourth transmission power determination method is the fourth transmission power determination method.
  • the first terminal device determines the transmission power of each feedback information in the at least one feedback information as the product of the maximum transmission power and the distribution ratio corresponding to the corresponding feedback information, and the distribution ratio is determined according to the priority of the corresponding feedback information.
  • the terminal device 1 may preset the corresponding relationship between the priority and the distribution ratio. For example, the distribution ratio corresponding to priority 1 is 30%, the distribution ratio corresponding to priority 2 is 20%, and the distribution ratio corresponding to priority 3 is 10%. . If the terminal device 1 determines to transmit HARQ information 1 to HARQ information 3, where the priority of HARQ information 1 and HARQ information 2 is priority 1, and the priority of HARQ information 3 is priority 2, then terminal device 1 determines HARQ information 1 And the transmission power of HARQ information 2 is Pmax*30%, and the transmission power of HARQ information 3 is Pmax*20%.
  • the fifth transmission power determination method is the fifth transmission power determination method.
  • the first terminal device may also determine the transmit power of each feedback information according to other methods, which are not listed here.
  • the first terminal device After the first terminal device determines the transmission power of each feedback information, it sends the feedback information on the same time domain unit (for example, the last symbol of time slot 3) according to the transmission power corresponding to each feedback information.
  • the terminal device may determine to send one or more feedback information of the multiple feedback information according to the priority of the multiple feedback information corresponding to the multiple data packets.
  • a terminal device can perform HARQ feedback on multiple data packets.
  • sending feedback information according to priority can reduce the transmission delay of high-priority services, and can improve the resource utilization of side links.
  • the solution in the embodiment of the present application is introduced by taking the feedback information as HARQ information as an example.
  • other types of information may also be used as the feedback information, and the feedback information is not described here. Make restrictions.
  • the HARQ information in the above solution can be replaced with the other types of information.
  • information other than feedback information can also be sent in the PSFCH.
  • channel state information CSI
  • multiple CSIs it can also be used
  • the above-mentioned idea is to determine to send at least one CSI according to the priority of multiple CSIs. For the specific process, please refer to the above-mentioned solution, which will not be repeated here.
  • the methods provided in the embodiments of this application are introduced from the perspective of interaction between the first terminal device, the second terminal device, and the network device.
  • the first terminal device and the second terminal device may include a hardware structure and/or a software module to A hardware structure, a software module, or a form of a hardware structure plus a software module realizes the above-mentioned functions. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 7 shows a schematic structural diagram of a terminal device 700.
  • the terminal device 700 may be a first terminal device, which can realize the function of the first terminal device in the method provided in the embodiment of this application; the terminal device 700 may also be able to support the first terminal device to implement the method provided in the embodiment of this application The corresponding function device.
  • the terminal device 700 may be a hardware structure, a software module, or a hardware structure plus a software module.
  • the terminal device 700 may be implemented by a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal device 700 may include a processing unit 701 and a transceiver unit 702.
  • the processing unit 701 may be used to perform step S504 in the embodiment shown in FIG. 5, and/or used to support other processes of the technology described herein.
  • the transceiver unit 702 is used for communication between the terminal device 700 and other modules, and it may be a circuit, a device, an interface, a bus, a software module, a transceiver, or any other device that can implement communication.
  • the transceiver unit 702 may be used to perform steps S501 to S503 and steps S505 to S506 in the embodiment shown in FIG. 5, and/or other processes for supporting the technology described herein.
  • FIG. 8 shows a schematic structural diagram of a terminal device 800.
  • the terminal device 800 may be a second terminal device, for example, may be the first second terminal device or the second second terminal device shown in FIG. 5, which can implement the second terminal device in the method provided in the embodiment of the present application.
  • the terminal device 800 may also be a device capable of supporting the second terminal device to implement the function of the second terminal device in the method provided in the embodiments of this application.
  • the terminal device 800 may be a hardware structure, a software module, or a hardware structure plus a software module.
  • the terminal device 800 may be implemented by a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal device 800 may include a processing unit 801 and a transceiver unit 802.
  • the transceiver unit 802 is used for communication between the terminal device 800 and other modules, and it may be a circuit, a device, an interface, a bus, a software module, a transceiver, or any other device that can implement communication.
  • the transceiving unit 802 may be used to execute steps S501 to S503 and steps S505 to S507 in the embodiment shown in FIG. 5, and/or other processes for supporting the technology described herein.
  • the processing unit 801 may be used to control the transceiving unit 802 to perform the steps performed by the transceiving unit 802 in the embodiment shown in FIG. 5, and/or to support other processes of the technology described herein.
  • the terminal device 900 may be a first terminal device, which can implement the function of the first terminal device in the method provided in the embodiment of this application; the terminal device 900 may also It is a device that can support the first terminal device to implement the corresponding function in the method provided in the embodiment of the present application.
  • the terminal device 900 may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the foregoing transceiver unit 702 may be a transceiver, and the transceiver is integrated in the terminal device 900 to form a communication interface 910.
  • the terminal device 900 includes at least one processor 920, configured to implement or support the terminal device 900 to implement the function of the first user plane function network element in the method provided in the embodiment of the present application.
  • the processor 920 may generate feedback information corresponding to at least two data packets. For details, refer to the detailed description in the method example, which is not repeated here.
  • the terminal device 900 may also include at least one memory 930 for storing program instructions and/or data.
  • the memory 930 and the processor 920 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 920 may operate in cooperation with the memory 930.
  • the processor 920 may execute program instructions stored in the memory 930. At least one of the at least one memory may be included in the processor.
  • the terminal device 900 may further include a communication interface 910 for communicating with other devices through a transmission medium, so that the device used in the device 900 can communicate with other devices.
  • the other device may be a second terminal device.
  • the processor 920 may use the communication interface 910 to send and receive data.
  • the communication interface 910 may specifically be a transceiver.
  • connection medium between the above-mentioned communication interface 910, the processor 920, and the memory 930 is not limited in the embodiment of the present application.
  • the memory 930, the processor 920, and the communication interface 910 are connected by a bus 940 in FIG. 9.
  • the bus is represented by a thick line in FIG. 9, and the connection modes between other components are merely illustrative. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the processor 920 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory 930 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory (volatile memory). For example, random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function, for storing program instructions and/or data.
  • the terminal device 1000 may be a second terminal device, which can implement the function of the second terminal device in the method provided in the embodiment of this application; the terminal device 1000 may also It is a device capable of supporting the second terminal device to realize the function of the second terminal device in the method provided in the embodiment of the present application.
  • the terminal device 1000 may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the foregoing transceiver unit 802 may be a transceiver, and the transceiver is integrated in the terminal device 1000 to form a communication interface 1010.
  • the terminal device 1000 includes at least one processor 1020, configured to implement or support the terminal device 1000 to implement the function of the session management function network element in the method provided in the embodiment of the present application.
  • the processor 1020 may control the transceiver to send at least two data packets. For details, refer to the detailed description in the method example, which is not repeated here.
  • the terminal device 1000 may also include at least one memory 1030 for storing program instructions and/or data.
  • the memory 1030 and the processor 1020 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1020 may cooperate with the memory 1030 to operate.
  • the processor 1020 may execute program instructions stored in the memory 1030. At least one of the at least one memory may be included in the processor.
  • the terminal device 1000 may further include a communication interface 1010 for communicating with other devices through a transmission medium, so that the device used in the device 1000 can communicate with other devices.
  • the other device may be a terminal.
  • the processor 1020 may use the communication interface 1010 to send and receive data.
  • the communication interface 1010 may specifically be a transceiver.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 1010, the processor 1020, and the memory 1030.
  • the memory 1030, the processor 1020, and the communication interface 1010 are connected by a bus 1040.
  • the bus is represented by a thick line in FIG. 10, and the connection modes between other components are merely illustrative. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the processor 1020 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory 1030 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory (volatile memory), For example, random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function, for storing program instructions and/or data.
  • the terminal device in the foregoing embodiment may be a terminal or a circuit, and may also be a chip applied to the terminal or other combination devices or components with the foregoing terminal functions.
  • the transceiver unit may be a transceiver, which may include an antenna and a radio frequency circuit, etc.
  • the processing module may be a processor, for example, a central processing unit (CPU).
  • the transceiver unit may be a radio frequency unit
  • the processing module may be a processor.
  • the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.
  • Fig. 11 shows a simplified structural diagram of a terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 11 In an actual terminal device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device
  • the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1110 and a processing unit 1120.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1110 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1110 as the sending unit, that is, the transceiver unit 1110 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1110 is used to perform the sending and receiving operations on the terminal device side in the foregoing method embodiment, and the processing unit 1120 is used to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.
  • the transceiving unit 1110 may be used to execute steps S501 to S503 and steps S505 to S506 in the embodiment shown in FIG. 5, and/or other methods used to support the technology described herein. process.
  • the processing unit 1120 is configured to execute step S504 in the embodiment shown in FIG. 5 and/or to support other processes of the technology described herein.
  • the transceiver unit 1110 may be used to execute steps S501 to S503 and steps S505 to S507 in the embodiment shown in FIG. 5, and/or to support the technology described herein.
  • the processing unit 1120 may be used to control the transceiving unit 802 to execute the steps performed by the transceiving unit 802 in the embodiment shown in FIG. 5, and/or to support other processes of the technology described herein.
  • the chip When the terminal device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.
  • the device can perform functions similar to the processing unit 1120 in FIG. 11.
  • the device includes a processor 1210, a data sending processor 1220, and a data receiving processor 1230.
  • the processing unit 701 or the processing unit 801 in the foregoing embodiment may be the processor 1210 in FIG. 12 and perform corresponding functions.
  • the transceiving unit 702 or the transceiving unit 802 in the foregoing embodiment may be the sending data processor 1220 and/or the receiving data processor 1230 in FIG. 12.
  • the channel encoder and the channel decoder are shown in FIG. 12, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are merely illustrative.
  • the terminal device 1300 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the terminal device in this embodiment can be used as the modulation subsystem therein.
  • the modulation subsystem may include a processor 1303 and an interface 1304.
  • the processor 1303 performs the functions of the aforementioned processing unit 701 or the processing unit 801, and the interface 1304 performs the functions of the aforementioned transceiving unit 702 or the transceiving unit 802.
  • the modulation subsystem includes a memory 1306, a processor 1303, and a program stored in the memory 1306 and capable of running on the processor.
  • the processor 1303 implements the first terminal in the foregoing method embodiment when the program is executed.
  • the memory 1306 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1300, as long as the memory 1306 can be connected to the The processor 1303 is fine.
  • the communication system 1400 includes a first terminal device and a second terminal device, optionally, a network device, or more A first terminal device and a second terminal device.
  • a first terminal device and one second terminal device are taken as an example.
  • the first terminal device and the second terminal device are respectively used to implement the functions of the above-mentioned related devices in FIG. 5. For details, please refer to the relevant descriptions in the above method embodiments, which will not be repeated here.
  • An embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the method executed by the first terminal device or the second terminal device in FIG. 5.
  • the embodiments of the present application also provide a computer program product, including instructions, which when run on a computer, cause the computer to execute the method executed by the first terminal device or the second terminal device in FIG. 5.
  • the embodiment of the present application provides a chip system, which includes a processor and may also include a memory, configured to implement the functions of the first terminal device or the second terminal device in the foregoing method.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • a computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc., integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, hard disk, Magnetic tape), optical media (for example, digital video disc (DVD for short)), or semiconductor media (for example, SSD).

Abstract

一种反馈信息的传输方法及终端装置,该方法可以应用于车联网,例如V2X、LTE-V、V2V等,或可以用于智能驾驶,智能网联车等领域,该方法包括,第一终端装置在侧行链路上接收至少两个数据包后,该第一终端装置可以根据针对该至少两个数据包的至少两个反馈信息的优先级,发送该至少两个反馈信息中的至少一个反馈信息。这样,终端装置在接收多个数据包后,可以根据与该多个数据包对应的多个反馈信息的优先级,确定发送该多个反馈信息中的一个或多个反馈信息,提供了一种终端装置可以对多个数据包进行HARQ反馈的方案。且,根据优先级发送反馈信息可以降低优先级高的业务的传输时延,可以提高侧行链路的资源利用率。

Description

一种反馈信息的传输方法及终端装置
相关申请的交叉引用
本申请要求在2019年08月01日提交中国专利局、申请号为201910707775.5、申请名称为“一种反馈信息的传输方法及终端装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种反馈信息的传输方法及终端装置。
背景技术
在车辆连接一切(vehicle to everything,V2X)通信方式中,V2X终端装置之间可以通过侧行链路(sidelink,SL)进行数据传输。为了保证数据传输的可靠性,可以在SL上定义物理侧行反馈信道(physical sidelink feedback channel,PSFCH),并利用混合自动重传请求(hybrid automatic repeat request,HARQ)技术,对传输的数据进行反馈。例如,V2X终端装置A向V2X终端装置B发送数据,若V2X终端装置B未成功译码该数据,则通过PSFCH发送HARQ否认应答(HARQ non-acknowledgement,HARQ-NACK)消息,当V2X终端装置A接收该HARQ-NACK消息后,则重传该数据。若V2X终端装置B成功译码该数据,则通过PSFCH发送HARQ确认应答(HARQ acknowledgement,HARQ-ACK)消息,当V2X终端装置A接收该HARQ-ACK消息后,则确定不用重传该数据。
然而,在V2X场景中,一个终端装置可以在一个或多个时隙内,分别与其他多个终端装置进行通信,也就是说,一个终端装置可以在一个或多个时隙内接收来自一个或多个终端装置的多个数据,在这种情况下,V2X终端装置如何进行HARQ反馈,目前没有解决方案。
发明内容
本申请实施例提供一种反馈信息的传输方法及终端装置,实现终端装置合理地发送或接收反馈信息。
第一方面,提供一种反馈信息的传输方法,该方法包括,第一终端装置在侧行链路上接收至少两个数据包后,该第一终端装置可以根据针对该至少两个数据包的至少两个反馈信息的优先级,发送至少一个反馈信息,该至少一个反馈信息属于该至少两个反馈信息。
在上述技术方案中,终端装置在接收多个数据包后,可以根据与该多个数据包对应的多个反馈信息的优先级,确定发送该多个反馈信息中的一个或多个反馈信息,提供了一种终端装置可以对多个数据包进行HARQ反馈的方案。且,根据优先级发送反馈信息可以降低优先级高的业务的传输时延,可以提高侧行链路的资源利用率。
在一种可能的设计中,该第一终端装置发送该至少一个反馈信息可以包括但不限于如下两种方式:
第一种方式,在一个时域单位上发送该至少两个反馈信息中优先级最高的反馈信息;
第二种方式,该第一终端装置在该时域单位上发送该至少两个反馈信息中的K个反馈信息,该K个反馈信息为该至少两个反馈信息按照优先级从高到低的顺序的前K个反馈信息,K为大于1的整数。
在上述技术方案中,第一终端装置可以采用多种方式发送该至少一个反馈信息,可以增加方案的灵活性。
在一种可能的设计中,至少两个反馈信息的优先级可以通过如下方式确定:
第一种方式,该第一终端装置可以接收与该至少两个数据包对应的至少一个控制信息,该至少一个控制信息中每个控制信息包括与至少一个数据包对应的第一指示信息,该第一指示信息用于指示与该至少一个数据包对应的至少一个反馈信息的优先级。
在上述技术方案中,第一终端装置可以根据第一指示信息来确定每个反馈信息的优先级,从而使得优先级高的数据包可以及时接收到反馈信息,实现方式简单。
第二种方式,可以根据第一终端装置是否成功译码数据包,将该至少两个数据包分为第一部分数据包和第二部分数据包,该第一部分数据包包括成功译码的数据包,所述第二部分数据包包括未成功译码的数据包。相应的,该至少两个反馈信息也可以分为第一部分反馈信息和第二部分反馈信息,其中,该第一部分反馈信息为针对第一部分数据包的至少一个反馈信息,该第二部分反馈信息为针对第二部分数据包的至少一个反馈信息,该第一部分反馈信息的优先级高于第二部分反馈信息的优先级。
在上述技术方案中,第一终端装置可以优先对成功译码的数据包进行反馈,可以避免第二终端装置对成功译码的数据包进行重传而导致的资源浪费的问题,可以提高资源利用率。
第三种方式,可以根据接收的数据包是否为最后一次重传的数据包,将该至少两个数据包分为第三部分数据包和第四部分数据包,该第三部分数据包包括非最后一次重传的数据包,该第四部分数据包包括最后一次重传的数据包。相应的,该至少两个反馈信息也可以分为第三部分反馈信息和第四部分反馈信息,该第三部分反馈信息为针对第三部分数据包的至少一个反馈信息,该第四部分反馈信息为针对第四部分数据包的至少一个反馈信息,该第三部分反馈信息的优先级高于该第四部分反馈信息的优先级。
若某一个数据包是最后一次重传的数据包,则即使第一终端装置不对该数据包进行反馈,发送该数据包的终端装置也不会再发送该数据包了,因此,在上述技术方案中,第一终端装置优先对非最后一次重传的数据包进行反馈,从而可以提高资源利用率。
第四种方式,可以根据接收的数据包来自第一类终端装置还是来自第二类终端装置,将该至少两个数据包分为第五部分数据包和第六部分数据包,其中,第五部分数据包是来自第一类终端装置的,第六部分数据包是来自第二类终端装置的,该第一类终端装置中的每个终端装置未接收到该第一终端装置发送的反馈信息的次数大于或等于第一门限,该第二类终端装置中的每个终端装置未接收到该第一终端装置发送的反馈信息的次数小于该第一门限。相应的,该至少两个反馈信息也可以分为第五部分反馈信息和第六部分反馈信息,该第五部分反馈信息为针对第五部分数据包的至少一个反馈信息,该第六部分反馈信息为针对第六部分数据包的至少一个反馈信息,该第五部分反馈信息的优先级高于第六部分反馈信息的优先级。
由于若某一个终端装置多次未接收反馈信息,则其会判断该无线链路失败,从而触发无线链路失败的处理流程,因此,在上述技术方案中,为了尽可能地减少发送数据包的终 端装置产生上述误判,则可以优先对第一类终端装置进行反馈。
在本申请中,也可以通过其他方式确定至少两个反馈信息的优先级,以及也可以将上述四种方式进行组合,来确定该至少两个反馈信息的优先级,在此不再赘述。
在一种可能的设计中,该第一终端装置可以先确定该至少一个反馈信息中每个反馈信息的发射功率,例如,每个反馈信息的反射功率为最大发射功率及与对应反馈信息对应的分配比例的乘积,该分配比例是根据该对应反馈信息的优先级确定的,该最大发射功率是预配置的或由网络装置配置的或根据下行链路的路损确定的。然后,该第一终端装置则根据该每个反馈信息的发射功率,发送该对应反馈信息。
在上述技术方案中,由于第一终端装置的最大发射功率的限制,根据优先级来确定对应的反馈信息的发射功率,可以为优先级高的反馈信息分配较高的发射功率,从而可以增加优先级高的反馈信息的传输可靠性。
在一种可能的设计中,该第一终端装置在侧行链路上接收至少两个数据包之后,若该第一终端装置从该至少两个数据包中确定第一数据包,该第一数据包为重传的数据包,且该第一数据包携带的进程号与在该第一数据包之前接收且成功译码的第二数据包相同,则该第一终端装置丢弃该第一数据包。
在上述技术方案中,可以避免第一终端装置对同一个数据包多次译码,可以减少第一终端装置的负载。
第二方面,提供一种反馈信息的传输方法,在该方法中,第二终端装置在侧行链路上发送至少两个数据包后,该第二终端装置可以接收针对该至少两个数据包中的至少一个数据包的至少一个反馈信息。
在上述技术方案中,第二终端装置在发送至少两个数据包后,可以接收与该至少两个数据包中每个数据包分别对应的多个反馈信息,也可以接收针对该至少两个数据包的一个反馈信息,也可以接收针对该至少两个数据包中的部分数据包的至少一个反馈信息,可以增加接收反馈信息的灵活性。且,若某一个反馈信息是针对至少两个数据包的反馈信息,可以提高资源的利用率。
在一种可能的设计中,该第二终端装置可以发送与该至少两个数据包对应的至少一个控制信息,该至少一个控制信息中的每个控制信息包括第一指示信息,该第一指示信息用于指示与至少一个数据包对应的至少一个反馈信息的优先级。
在上述技术方案中,第二终端装置可以通过控制信息指示与数据包对应的反馈信息的优先级,实现方式简单。
第三方面,提供一种终端装置,该终端装置包括处理器,用于实现上述第一方面中第一终端装置所执行的方法。该终端装置还可以包括存储器,用于存储程序指令和数据。该存储器与该处理器耦合,该处理器可以调用并执行该存储器中存储的程序指令,用于实现上述第一方面中第一终端装置所执行的任意一种方法。该终端装置还可以包括收发器,该收发器用于该终端装置与其它设备进行通信。示例性地,该其它设备为第二终端装置。
第四方面,本申请实施例提供一种终端装置,包括:收发单元,用于在侧行链路上接收至少两个数据包;处理单元,用于根据至少两个反馈信息的优先级,控制该收发单元发送至少一个反馈信息,该至少一个反馈信息属于该至少两个反馈信息,该至少两个反馈信息为针对该至少两个数据包的反馈信息。
此外,第四方面所提供的终端装置可用于执行第一方面中第一终端装置对应的方法, 第四方面所提供的终端装置中未详尽描述的实现方式可参见前述实施例,此处不再赘述。
第五方面,提供一种终端装置,该终端装置包括处理器,用于实现上述第二方面中第二终端装置所执行的方法。该终端装置还可以包括存储器,用于存储程序指令和数据。该存储器与该处理器耦合,该处理器可以调用并执行该存储器中存储的程序指令,用于实现上述第二方面中第二终端装置所执行的任意一种方法。该终端装置还可以包括收发器,该收发器用于该终端装置与其它设备进行通信。示例性地,该其它设备为第一终端装置。
第六方面,本申请实施例提供一种终端装置,包括:收发单元,用于在处理单元的控制下,在侧行链路上发送至少两个数据包;以及,用于在该处理单元的控制下,接收至少一个反馈信息,该至少一个反馈信息为针对该至少两个数据包中的至少一个数据包的反馈信息。
此外,第六方面所提供的终端装置可用于执行第二方面中第二终端装置所执行的方法,第六方面所提供的终端装置中未详尽描述的实现方式可参见前述实施例,此处不再赘述。
第七方面,本申请实施例中还提供一种计算机可读存储介质,包括指令,当其在计算机上运行时,使得计算机执行第一方面中第一终端装置或第二方面中第二终端装置执行的方法。
第八方面,本申请实施例中还提供一种计算机程序产品,包括指令,当其在计算机上运行时,使得计算机执行第一方面中第一终端装置或第二方面中第二终端装置执行的方法。
第九方面,本申请实施例提供了一种芯片系统,该芯片系统包括处理器,还可以包括存储器,用于实现第一方面中第一终端装置或第二方面中第二终端装置执行的方法。该芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
第十方面,本申请实施例提供了一种通信系统,所述系统包括第三方面以及第五方面所述的终端装置,或包括第四方面以及第六方面的终端装置。
上述第三方面至第十方面及其实现方式的有益效果可以参考对第一方面的方法及其实现方式或第一方面的方法及其实现方式的有益效果的描述。
附图说明
图1为V2X的三种应用场景的示例的网络架构图;
图2为现有技术中终端装置向网络装置发送HARQ信息的流程图;
图3A为本申请实施例中终端装置在一个时隙上向两个终端装置发送HARQ信息的一种示例的示意图;
图3B为本申请实施例中终端装置在一个时隙上向两个终端装置发送HARQ信息的另一种示例的示意图;
图4为本申请实施例所应用的一种网络架构的示意图;
图5为本申请实施例提供的一种反馈信息的传输方法的流程图;
图6为本申请实施例中PSCCH所在的时频资源、PSSCH所在的时频资源以及PSFCH所在的时频资源的一种示例的示意图;
图7为本申请实施例中提供的终端装置的一种示例的结构示意图;
图8为本申请实施例中提供的终端装置的另一种示例的结构示意图;
图9为本申请实施例中提供的终端装置的另一种示例的结构示意图;
图10为本申请实施例中提供的终端装置的另一种示例的结构示意图;
图11为本申请实施例提供的终端装置的另一种示例的示意性框图;
图12为本申请实施例提供的终端装置的另一种示例的另一示意性框图;
图13为本申请实施例提供的终端装置的另一种示例的再一示意性框图;
图14为本申请实施例提供的通信系统的一种示例的示意性框图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚,下面将结合附图对本申请实施例作进一步地详细描述。
以下,对本申请实施例中的部分用语进行解释说明,以便于本领域技术人员理解。
1)终端装置,包括向用户提供语音和/或数据连通性的装置,具体的,包括向用户提供语音的设备,或包括向用户提供数据连通性的设备,或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network,RAN)与核心网进行通信,与RAN交换语音或数据,或与RAN交互语音和数据。该终端装置可以包括用户设备(user equipment,UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device,D2D)终端设备、车到一切(vehicle to everything,V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications,M2M/MTC)终端设备、物联网(internet of things,IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、远程站(remote station)、接入点(access point,AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如,可以包括移动电话(或称为“蜂窝”电话),具有移动终端设备的计算机,便携式、袖珍式、手持式、计算机内置的移动装置等。例如,个人通信业务(personal communication service,PCS)电话、无绳电话、会话发起协议(session initiation protocol,SIP)话机、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、等设备。还包括受限设备,例如功耗较低的设备,或存储能力有限的设备,或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification,RFID)、传感器、全球定位系统(global positioning system,GPS)、激光扫描器等信息传感设备。
作为示例而非限定,在本申请实施例中,该终端装置还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端装置,如果位于车辆上(例如放置在车辆内或安装在车辆内),都可以认为是车载终端设备,车载终端设备例如也称为车载单元(on-board unit,OBU)。本申请的终端装置还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元,车辆通过内置的所述车载模块、车载模组、车 载部件、车载芯片或者车载单元可以实施本申请的方法。
2)网络装置,例如包括接入网(access network,AN)设备,例如基站(例如,接入点),可以是指接入网中在空口通过一个或多个小区与无线终端装置通信的设备,或者例如,一种车到一切(vehicle-to-everything,V2X)技术中的网络装置为路侧单元(road side unit,RSU)。基站可用于将收到的空中帧与IP分组进行相互转换,作为终端装置与接入网的其余部分之间的路由器,其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体,可以与支持V2X应用的其他实体交换消息。网络装置还可协调对空口的属性管理。例如,网络装置可以包括长期演进(long term evolution,LTE)系统或高级长期演进(long term evolution-advanced,LTE-A)中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),或者也可以包括第五代移动通信技术(the 5th generation,5G)新空口(new radio,NR)系统(也简称为NR系统)中的下一代节点B(next generation node B,gNB)或者也可以包括云接入网(cloud radio access network,Cloud RAN)系统中的集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),本申请实施例并不限定。
当然网络装置还可以包括核心网装置,但因为本申请实施例提供的技术方案主要涉及的是接入网装置,因此在后文中,如无特殊说明,则所描述的“核心网装置”是指核心网装置,而所描述的“网络装置”或“接入网装置”均是指接入网装置。
3)V2X,是车与外界进行互联互通,这是未来智能汽车、自动驾驶、智能交通运输系统的基础和关键技术。V2X作为设备到设备(device-to-device,D2D)技术的一个主要应用,将在已有的D2D技术的基础上,对V2X的具体应用需求进行优化,例如,需要进一步减少V2X设备的接入时延或反馈信道传输的问题。
V2X具体又包括车与车(vehicle-to-vehicle,V2V)、车与路侧基础设施(vehicle-to-infrastructure,V2I)、车与行人(vehicle-to-pedestrian,V2P)的直接通信,以及车与网络(vehicle-to-network,V2N)的通信交互等几种应用需求。如图1所示。V2V指的是车辆间的通信;V2P指的是车辆与人(包括行人、骑自行车的人、司机、或乘客)的通信;V2I指的是车辆与网络装置的通信,网络装置例如RSU,另外还有一种V2N可以包括在V2I中,V2N指的是车辆与基站/网络的通信。
其中,V2P可以用做给道路上行人或非机动车安全警告。通过V2I,车辆可以与道路甚至其他基础设施,例如交通灯、路障等,进行通信,获取交通灯信号时序等道路管理信息。V2V可以用做车辆间信息交互和提醒,最典型的应用是用于车辆间防碰撞安全系统。V2N是目前应用最为广泛的车联网形式,其主要功能是使车辆通过移动网络,连接到云服务器,使用云服务器提供的导航、娱乐、或防盗等应用功能。
4)V2X的数据传输方式。在V2X中,主要是终端装置和终端装置之间的通信。对于终端装置和终端装置之间的传输模式,当前标准协议支持的有广播方式,组播方式,和单播方式。
广播方式:广播方式是指作为发送端的终端装置采用广播的模式进行数据发送,多个终端装置端均能接收来自发送端的侧行链路控制信息(sidelink control information,SCI)或承载在侧行链路共享信道(sidelink shared channel,SSCH)上的数据信息。
在侧行链路中,保证所有的终端装置都解析来自发送端的控制信息的方式是,发送端不对控制信息加扰,或者发送端使用所有的终端装置都已知的扰码对控制信息加扰。
组播方式:组播方式和广播发送相似,作为发送端的终端装置采用组播的模式进行数据发送,一组终端装置均能解析SCI或SSCH。
单播方式:单播方式是一个终端装置向另外一个终端装置发送数据,其它终端装置不需要或者不能够解析该数据。
5)通用用户网络接口(user to network interface universal,Uu),是终端装置和网络装置之间用于无线通信的接口,也可以简称Uu口或者Uu接口。
6)侧行链路(sidelink,SL),也可以称为边链路,侧行链路等,本申请实施例对此名称不作限定。在V2X场景中,侧行链路为进行V2X通信的多个终端装置之间的进行数据通信的链路。在D2D场景中,侧行链路为进行D2D通信的多个终端装置之间的进行数据通信的链路。作为一种示例,侧行链路可以为SSCH,SSCH可以包括物理侧行共享信道(physical sidelink shared channel,PSSCH),窄带物理侧行共享信道(narrow-band physical sidelink shared channel,NPSSCH),也可以包括其他信道,在此不作限制。
7)时域单元,可以是一个无线帧、一个子帧、一个时隙(slot)、微时隙(mini slot)或者一个正交频分复用(orthogonal frequency division multiplexing,OFDM)符号(symbol),还可以是由多个无线帧或多个子帧或多个时隙或多个微时隙或多个OFDM符号聚合组成的单元。其中,一个无线帧可以包括多个子帧,一个子帧可以包括一个或多个时隙,一个时隙可以包括至少一个符号。或者,一个无线帧可以包括多个时隙,一个时隙可以包括至少一个符号。需要说明的是,在本申请实施例中,一个OFDM符号也可以简称为一个符号。
8)子信道,是物理侧行共享信道占用频域资源的最小单位,一个子信道可以包括一个或多个资源块(resource block,RB)。无线通信系统在频域上的带宽可以包括多个RB,例如,在LTE系统的各可能的带宽中,包括的PRB可以为6个、15个、25个、50个等。在频域上,一个RB可以包括若干个子载波,例如,在LTE系统中,一个RB包括12个子载波,其中,每个子载波间隔可以为15kHz,当然,也可以采用其他子载波间隔,例如3.75kHz、30kHz、60kHz或120kHz子载波间隔,在此不作限制。
9)在本申请的描述中,“多个”是指两个或两个以上,鉴于此,本申请实施例中也可以将“多个”理解为“至少两个”。“至少一个”,可理解为一个或多个,例如理解为一个、两个或更多个。例如,包括至少一个,是指包括一个、两个或更多个,而且不限制包括的是哪几个,例如,包括A、B和C中的至少一个,那么包括的可以是A或B或C或A和B或A和C或B和C或A和B和C。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,字符“/”,如无特殊说明,一般表示前后关联对象是一种“或”的关系。本申请实施例中的术语“系统”和“网络”可被互换使用。
除非有相反的说明,本申请实施例提及“第一”、“第二”等序数词用于对多个对象进行区分,不用于限定多个对象的顺序、时序、优先级或者重要程度。
下面介绍本申请实施例所涉及的技术特征。
在无线通信系统中,例如,LTE系统或者NR系统中,终端装置与网络装置之间通过Uu接口进行数据传输。为保证数据传输的可靠性,当终端装置接收到网络装置通过Uu接口发送的下行数据后,则会通过Uu接口向网络装置发送HARQ信息。例如,若终端装置对该下行数据成功译码,则终端装置通过Uu接口向网络装置发送HARQ-ACK信息,当网络装置接收到该HARQ-ACK信息后,确认终端装置成功接收该数据,从而不用进行重 传。若终端装置未对该下行数据成功译码,则终端装置通过Uu接口向网络装置发送HARQ-NACK信息,当网络装置接收到终端装置发送的HARQ-NACK信息后,确认终端装置未成功译码该下行数据,如果没有达到最大重传次数,则再次向终端装置发送该下行数据,直至终端装置成功译码该下行数据或者达到最大重传次数。该HARQ-ACK信息也可以简称为ACK信息,该HARQ-NACK信息也可以简称为NACK信息。
请参考图2,为终端装置向网络装置发送HARQ信息的流程图。
S201、网络装置向终端装置发送配置信息,终端装置接收配置信息。
该配置信息用于指示终端装置的HARQ最大重传次数,发送HARQ反馈信息的频域及码域资源,码域资源可以是使用的序列或序列循环移位值。在配置的调度授予(configured grant,CG)场景中,该配置信息还用于指示终端装置在Uu接口接收下行数据到发送HARQ信息的时间间隔,如该配置信息指示在时隙n+4通过Uu接口发送HARQ信息。其中,时隙n可以理解为终端装置接收下行数据的时隙,则时隙n+4则可以理解为,在接收到下行数据的时隙之后的4个时隙,向网络装置发送HARQ信息。
S202、网络装置发送下行数据,终端装置接收下行数据。
例如,网络装置在CG场景下,在时隙0向终端装置发送下行数据,终端装置在时隙0接收该下行数据。
S203、终端装置向网络装置发送HARQ信息,网络装置接收该HARQ信息。
例如,终端装置在时隙0接收该下行数据后,则确定需要在时隙4通过Uu接口向网络装置发送HARQ信息。若终端装置成功译码该下行数据,则终端装置在时隙4通过Uu接口向网络装置发送ACK信息,否则,终端装置在时隙4通过Uu接口向网络装置发送NACK信息。
由于一个Uu接口是指一个终端装置与一个网络装置的通信接口,可以理解为,Uu接口与网络装置之间存在一一对应关系,也就是说,终端装置通过某一个Uu接口只能与一个网络装置通信,因此,终端装置在通过Uu接口与网络装置通信时,在该通信过程中,终端装置在一个时隙上只会向一个网络装置发送HARQ信息。
然而,在V2X或者D2D侧行通信场景中,一个终端装置可以在一个或多个时域单元(例如一个时隙)内,分别与其他多个终端装置进行单播通信,或者,一个终端装置也可以在一个或多个时域单元内,与多个不同的终端装置进行组播通信。在这种情况下,一个终端装置可以在同一个时域单元接收来自一个或多个终端装置的多个数据,从而,该终端装置可能需要在同一个时域单元上,针对该多个数据发送多个HARQ信息。
下面,以终端装置在一个时隙上向两个终端装置发送HARQ信息为例,对上述场景进行说明。
在下面的示例中,假设网络装置为终端装置配置用于发送HARQ信息的PSFCH资源为:每3个时隙配置一个用于发送PSFCH的资源。每个PSFCH和相应的用于数据传输的PSSCH占用相同的频域资源。
作为一种示例,在图3A中,UE1和UE2分别在同一个时隙且在不同的子信道上向UE0发送数据包。例如,UE1和UE2分别在时隙0向UE0发送数据包,且UE1在时隙0占用子信道1向UE0发送数据包1,UE2在时隙0占用子信道2向UE0发送数据包2。当UE0接收到该数据包1和数据包2后,则在时隙3分别向UE1和UE2发送HARQ信息,例如,UE0在时隙3占用子信道1向UE1发送与数据包1对应的HARQ 1,并在时隙3占 用子信道2向UE2发送与数据包2对应的HARQ 2。其中,HARQ1和HARQ2可以是ACK信息,也可以是NACK信息,具体根据UE0对数据包1和数据包2的译码结果确定。
作为另一种示例,在图3B中,UE3和UE4分别在不同时隙且在不同的子信道上向UE0发送数据包。例如,UE3在时隙0占用子信道1向UE0发送数据包3,UE4分别在时隙1占用子信道2向UE0发送数据包4,以及,在时隙2占用子信道3向UE0发送数据包5。当UE0接收到该数据包3~数据包5后,则在时隙3中占用不同的子信道,向UE3和UE4发送HARQ信息。例如,UE0在时隙3占用子信道1向UE3发送与数据包3对应的HARQ 3,以及,在时隙3分别占用子信道2和子信道3向UE4发送分别与数据包4和数据包5对应的HARQ 4和HARQ 5。
需要说明的是,在图3A和图3B所示的场景中,PSFCH和PSSCH所占用的时域资源为一个时隙,但是在实际应用中,各个信道可能只占用一个时隙中的一个或多个符号。且在实际应用中,网络装置还需要给终端装置配置其他的信道,例如,可以配置物理侧行控制信道(physical sidelink control channel,PSCCH)等,在图3A和图3B中未示出。图3A和图3B中各个信道所占用的时频资源仅用于示意,不应理解为对这些信道的限制。
由前述内容可知,在终端装置通过Uu接口与网络装置进行数据传输时,终端装置在一个时隙上只会向一个网络装置发送HARQ信息,因此,图2所示的HARQ信息的发送流程无法适用于终端装置在一个时隙上发送多个HARQ信息的场景。在这种情况下,终端装置应该如何发送HARQ信息,目前没有解决方案。
鉴于此,本申请实施例提供一种反馈信息的传输方法,实现终端装置合理地进行HARQ反馈。
本申请实施例提供的技术方案可以应用于V2X场景,可以是NR V2X场景也可以是LTE V2X场景等,或者还可以应用于其他的D2D场景或其他的通信系统,在此不作限制。
下面介绍本申请实施例所应用的网络架构。请参考图4,为本申请实施例所应用的一种网络架构。
图4中包括网络装置和四个终端装置,分别为终端装置1~终端装置4,这四个终端设备均可以在网络装置的覆盖下,或者这四个终端设备可以只有一部分终端装置在网络装置的覆盖下,例如,终端装置1在网络装置的覆盖下,终端装置2~终端装置4不在网络装置的覆盖下,这四个终端装置之间也可以通过侧行链路进行通信,或者这四个终端设备也可以在不同的网络装置的覆盖下,或者这四个终端设备也可以均不在网络装置的覆盖下。图4以这四个终端装置均在图4中所示的一个网络装置的覆盖下为例。当然图4中的终端装置的数量只是举例,在实际应用中,网络装置可以为多个终端装置提供服务。
图4中的网络装置例如为接入网设备,例如基站,或者还可以是RSU等,图4中以基站为例。其中,接入网设备在不同的系统对应不同的设备,例如在第四代移动通信技术(the 4th generation,4G)系统中可以对应eNB,在5G系统中对应5G中的接入网设备,例如gNB。图4中的终端装置可以是V2X终端装置,例如为车载终端装置或车辆为例,但本申请实施例中的终端装置不限于此。
接下来结合附图介绍本申请实施例提供的技术方案。
请参考图5,为本申请实施例提供的一种反馈信息的方法的流程图,在下面的介绍中,将以该方法由第一终端装置和至少一个第二终端装置执行为例。例如,该方法应用于图4所示的网络架构,则该第一终端装置可以为图4所示的4个终端装置中的任意一个终端装 置,该至少一个第二终端装置则可以为图4中除第一终端装置外的其他终端装置。作为一种示例,该第一终端装置可以为图4所示的终端装置1,该至少一个第二终端装置可以为如图4所示的终端装置2~终端装置4;或者,该第一终端装置可以为图4所示的终端装置1,该至少一个终端装置可以为如图4所示的终端装置2~终端装置4中的一部分终端装置(例如,为终端装置2和终端装置3)。
为方便说明,在下文中,以第一终端装置为图4所示的终端装置1,至少一个第二终端装置为终端装置2~终端装置4,终端装置1~终端装置4均在网络装置的覆盖下为例。
S501、网络装置发送配置信息,第一终端装置和至少一个第二终端装置接收该配置信息。
在申请实施例中,该配置信息用于指示终端装置的侧行链路所在的时频资源。该侧行链路所在的时频资源可以是理解为是第一终端装置和至少一个第二终端装置进行V2X通信时所使用的时频资源。该配置信息可以是无线资源控制(radio resource control,RRC)信令,也可以是媒体接入控制(media access control,MAC)信令,当然,也可以是其他信令,在此不作限制。为便于区分,在图5中将至少两个第二终端装置分别标记为第一个第二终端装置和第二个第二终端装置。
作为一种示例,该配置信息可以指示一个资源池,该资源池是由时域资源(包括多个时域单元)和频域资源(包括多个子信道)组成的资源集合。该资源池中的每个时频资源均可以用于V2X通信。终端装置可以从该资源池中选择一个或多个时频资源进行V2X通信。
作为另一种示例,该配置信息中可以包括PSCCH所在的时频资源、PSSCH所在的时频资源以及PSFCH所在的时频资源。例如,请参考图6,该配置信息中指示的PSSCH所在时域资源可以为时隙0~时隙9,PSSCH所在的频域资源为子信道0~子信道9。其中,PSCCH的频域资源与PSSCH的频域资源不同(也可以相同,在图6中以PSCCH的频域资源与PSSCH的频域资源不同为例),PSCCH的时域资源为时隙0~时隙9中每个时隙的第一个自动增益控制(automatic gain control,AGC)符号后的第一和第二个符号,PSFCH位于时隙0、时隙3以及时隙6中每个时隙的最后一个间隔(gap)符号之前的一个符号(即符号12)。例如,每个时隙的第一AGC符号为符号0,则PSCCH占用的时域资源即符号1和符号2,每个时隙的最后一个gap符号为最后一个符号,则每个PSFCH占用的时域资源则为符号12。
需要说明的是,在图6中,以每个时隙包括14个符号为例进行说明,当然,在不同的通信系统中,一个时隙可以包括7个符号或者其他数量的符号,在此不作限制。
另外,需要说明的是,该侧行链路所在的时频资源也可以通过其他方式获取。作为一种示例,可以是预配置的,例如,包括操作维护管理(operation administration and maintenance,OAM)配置,或者预先设置在每个终端装置中。在图6中,仅以网络装置向每个终端装置发送该配置信息为例。
S502、第一终端装置与每个第二终端装置建立侧行链路。
具体来讲,第一终端装置将侧行链路的配置信息发送给至少一个第二终端装置,以通过该配置信息建立第一终端装置和每个第二终端装置的侧行链路。当然,也可以是每个终端装置向第一终端装置发送配置信息,在此不作限制。该配置信息包括使能HARQ功能,反馈最小时间间隔等。为方便说明,在下文中,以该侧行链路所在的时频资源如图6所示 为例。
S503、至少一个第二终端装置向第一终端装置发送至少两个数据包,第一终端装置接收该至少两个数据包。
当第一终端装置与每个第二终端装置建立侧行链路后,第一终端装置则可以在该侧行链路上向第二终端装置发送数据包,或者,该第二终端装置也可以通过该侧行链路向第一终端装置发送数据包。第二终端装置可以采用单播或组播方式,向第一终端装置发送数据包,在下文中,以第二终端装置采用单播方式向第一终端装置发送数据包为例。
该多个第二终端装置可以在同一时隙占用不同的子信道发送数据包。例如,终端装置2~终端装置4可以在时隙0,分别占用子信道1~子信道3向终端装置1发送数据包1~数据包3。或者,该多个第二终端装置也可以在不同的时隙占用不同的子信道发送数据包。例如,终端装置2可以在时隙0占用子信道1,向终端装置1发送数据包1,终端装置3可以在时隙1占用子信道2,向终端装置1发送数据包2。在本申请实施例中,不对该多个第二终端装置发送数据包所占用的时频资源进行限制。
作为一种示例,在下文中,以终端装置2在时隙0占用子信道1向终端装置1发送的数据包1,终端装置3在时隙0占用子信道2向终端装置1发送数据包2,以及,在时隙1分别占用子信道2和子信道3向终端装置1发送数据包3和数据包4,终端装置4在时隙2占用子信道3向终端装置1发送数据包5为例。
相应地,终端装置1则在对应的时频资源上接收该数据包1~数据包5。
S504、第一终端装置生成与每个数据包对应的反馈信息。
当第一终端装置接收到每个第二终端装置发送的数据包后,则对每个数据包进行译码,并根据对每个数据包的译码结果,生成与每个数据包对应的反馈信息。在本申请实施例中,若终端装置采用HARQ技术对接收的数据包反馈,则该反馈信息可以理解为HARQ信息。若在V2X场景中,终端装置之间还可以通过其他通信技术对接收的数据包进行反馈,则该反馈信息也可以是其他信息,在此不作限制。下文中,以该反馈信息为HARQ信息为例。
在本申请实施例中,第一终端装置根据译码结果生成HARQ信息可以包括但不限于如下三种方式:
第一种生成方式,根据对数据包的译码结果,生成ACK信息和NACK信息。也就是说,若第一终端装置成功译码某一个数据包,则生成与该数据包对应的HARQ信息为ACK信息;若第一终端装置未成功译码该数据包,则生成与该数据包对应的HARQ信息为NACK信息。
第二种生成方式,只对成功译码的数据包进行反馈。也就是说,若第一终端装置成功译码某一个数据包,则生成与该数据包对应的HARQ信息为ACK信息;若第一终端装置未成功译码该数据包,则不生成与该数据包对应的反馈信息。
第三种生成方式,只对未成功译码的数据包进行反馈。也就是说,若第一终端装置未成功译码该数据包,则生成与该数据包对应的HARQ信息为NACK信息;若第一终端装置成功译码某一个数据包,则不生成与该数据包对应的反馈信息。
需要说明的是,在第二种方式和第三种方式中,第一终端装置不生成与数据包对应的反馈信息,也可以理解为,第一终端装置在生成该数据包对应的反馈信息后,确定该反馈信息与要允许发送的反馈信息的类型不同(反馈信息的类型可以包括确认类型或者否认类型),从而确定该反馈信息是不用发送的。例如,在第二种方式下,生成与未成功译码的 数据包对应的反馈信息为NACK信息,但是第一终端装置只会对成功译码的数据包进行反馈,也就是说,只能发送ACK信息,因此,第一终端装置确定该NACK信息不用发送。
作为一种示例,终端装置1采用第一种方式生成HARQ信息。终端装置1在接收到数据包1~数据包5后,成功译码该数据包1~数据包3,从而分别生成与数据包1~数据包3对应的HARQ信息1~HARQ信息3(其中每个HARQ信息均为ACK信息);且,终端装置1未成功译码数据包4和数据包5,从而分别生成与数据包4和数据包5对应的HARQ信息4和HARQ信息5(其中每个HARQ信息均为NACK信息)。
S505、第一终端装置根据至少两个反馈信息的优先级,发送至少一个反馈信息,第二终端装置接收该至少一个反馈信息。
该第二终端装置可以是前述至少一个第二终端装置中的其中一个第二终端装置。在图5中以第一终端装置向第一个第二终端装置发送该至少一个反馈信息为例。
在本申请实施例中,该至少一个反馈信息属于第一终端装置针对接收到的至少两个数据包的至少一个反馈信息。可以理解为,当第一终端装置生成与每个数据包对应的反馈信息后,第一终端装置会发送多个反馈信息中的部分反馈信息或者全部反馈信息。
下面,对反馈信息的优先级进行说明。
在本申请实施例中,反馈信息的优先级可以通过如下四种方式中的任意一种或多种方式确定。
第一种确定方式,与数据包对应的反馈信息的优先级可以根据第一终端装置是否成功译码该数据包来确定。
具体来讲,第一终端装置可以根据是否成功译码数据包,将接收到的数据包分为两个部分,第一部分数据包包括成功译码的数据包,第二部分数据包包括未成功译码的数据包。第一终端装置确定,在至少两个反馈信息中,针对第一部分数据包的反馈信息的优先级,高于针对第二部分数据包的反馈信息的优先级。
例如,当终端装置1成功译码该数据包1~数据包3,且,未成功译码数据包4和数据包5,从而确定与数据包1~数据包3对应的至少一个反馈信息中每个反馈信息的优先级高于与数据包4和数据包5对应的至少一个反馈信息中每个反馈信息的优先级,即HARQ信息1~HARQ信息3中的每个HARQ信息的优先级高于HARQ信息4或HARQ信息5。例如,终端装置1可以确定HARQ信息1~HARQ信息3中的每个HARQ信息的优先级为优先级1,HARQ信息4和HARQ信息5的优先级为优先级2,其中,优先级1高于优先级2。
在上述技术方案中,第一终端装置可以优先对成功译码的数据包进行反馈,可以避免第二终端装置对成功译码的数据包进行重传而导致的资源浪费的问题,可以提高资源利用率。
第二种确定方式,与数据包对应的反馈信息的优先级可以根据该数据包的大小来确定。
作为一种示例,第一终端装置可以预先设置优先级与数据包的大小的对应关系,然后根据该对应关系确定每个反馈信息的优先级。例如,该对应关系可以为:若数据包的大小大于5兆字节(megabytes,MB),则该数据包的反馈信息的优先级为优先级1;若数据包的大小大于2MB且小于或等于5MB,则该数据包的反馈信息的优先级为优先级2;若数据包的大小小于或等于2MB,则该数据包的反馈信息的优先级为优先级3。其中,优先级1高于优先级2,且优先级2高于优先级3。假设数据包1~数据包5的大小依次为5MB、 3MB、3MB、2MB以及1MB,则终端装置1确定HARQ信息1~HARQ信息5的优先级依次为优先级2、优先级2、优先级2、优先级3以及优先级3。
作为另一种示例,第一终端装置也可以不设置优先级与数据包大小的对应关系,仅通过比较接收到的多个数据包的大小确定优先级的高低。例如,终端装置1确定数据包1~数据包5的大小关系为:数据包1>数据包2=数据包3>数据包4>数据包5,则终端装置1确定HARQ信息1~HARQ信息5的优先级顺序为:HARQ信息1>HARQ信息2=HARQ信息3>HARQ信息4=HARQ信息5。
在上述技术方案中,第一终端装置可以根据数据包的大小顺序进行反馈,从而当第一终端装置只能发送至少两个反馈信息中的一部分反馈信息时,没有发送的反馈信息所对应的数据包最小,进而使得由于没有接收到反馈信息而触发的重传所占用的时频资源最少,可以提高资源利用率。
第三种确定方式,与数据包对应的反馈信息的优先级可以根据数据包是否为最后一次重传的数据包来确定。
在这种确定方式下,在步骤S505之前,本申请实施例中的方法还包括:
S506、每个第二终端装置发送与数据包对应的第一控制信息,第一终端装置接收该至少一个第一控制信息。
该第一控制信息中包括可以携带冗余版本信息,或者可以携带进程号(例如,HARQ进程(process)ID)以及新数据指示(new data indicator,NDI)。第一终端装置可以根据该第一控制信息中冗余版本信息、进程号以及NDI中的一个或多个确定该数据包是否为最后一次重传的数据包。
具体来讲,第一终端装置可以根据数据包是否是最后一次重传的数据包,将接收到的数据包分为两个部分,例如,分为第三部分数据包和第四部分数据包,其中,第三部分数据包包括非最后一次重传的数据包,第四部分数据包包括最后一次重传的数据包。第一终端装置确定,在至少两个反馈信息中,针对第三部分数据包的反馈信息的优先级,高于针对第四部分数据包的反馈信息的优先级。
作为一种示例,当终端装置1接收到数据包1~数据包5后,可以根据控制信息中携带的冗余版本信息获取每个数据包中携带的为第几次重传,冗余版本信息,并根据该冗余版本信息确定该数据包是否为最后一个重传的数据包。例如,终端装置1配置有最大重传次数(该最大重传次数可以是终端装置1预先设置的,或者可以是网络装置配置的,或者,也可以是其他方式确定的),例如,该最大重传次数为4次。然后,终端装置1根据确定每个数据包的冗余版本信息的取值确定是否等于为最后一次该最大重传次数,若根据某个数据包的冗余版本信息的取值确定为等于该最后一次大重传次数,则终端装置1确定该数据包为最后一次重传的数据包。例如,终端装置1通过上述方式,确定数据包4和数据包5为最后一次重传的数据包,数据包1~数据包3为非最后一次重传的数据包,则终端装置1确定HARQ信息1~HARQ信息3的优先级高于HARQ信息4或HARQ信息5的优先级。
作为另一种示例,终端装置1可以记录接收的相同的数据包的次数。例如,终端装置1可以根据与每个数据包对应的进程号(例如,HARQ进程(process)ID),确定两个数据包是否为同一个数据包,当两个数据包的进程号相同且新数据指示信息没有反转时,则确认这两个数据包是同一个数据包,然后,终端装置1则记录接收到同一个数据包的次数。当接收某一个数据包的次数达到最大重传次数时,则确认该数据包为最后一次重传的数据 包,否则,确认该数据包不是最后一次重传的数据包。
需要说明的是,若某一个数据包是最后一次重传的数据包,则即使第一终端装置不对该数据包进行反馈,发送该数据包的终端装置也不会再发送该数据包了,因此,在上述技术方案中,第一终端装置优先对不是最后一次重传的数据包进行反馈,从而可以提高资源利用率。
在这种情况下,第一终端装置还可以根据进程号和NDI,确定该数据包为重传的数据包还是首次传输的数据包。当进程号与第一终端装置之前接收且成功译码的数据包相同,且该数据包的NDI没有反转(toggled),则第一终端装置确定该数据包为重传的数据包(即第一数据包)。为了防止第一终端装置对同一个数据包多次译码,减少第一终端装置的负载,第一终端装置可以丢弃该数据包。
另外,需要说明的是,第一终端装置可以不对该第一数据包进行译码,但是,仍然需要生成与该第一数据包对应的反馈信息,以及确定与该第一数据包对应的反馈信息的优先级,进而确定是否发送该反馈信息。
需要说明的是,步骤S506中的第一控制信息也可以是和步骤S503中的至少两个数据包可以是分开发送,也可以是一起发送。当第一控制信息和至少两个数据包分开发送时,则分别执行步骤S503和步骤S506;当第一控制信息和至少两个数据包一起发送,则步骤S506可以与步骤S503同时执行,或者,这两个步骤可以合并为一个步骤。
另外,步骤S506是可选步骤,例如,当第一终端装置不使用第五种确定方式确定反馈信息的优先级,则第一终端装置不需要根据数据包对应的控制信息来确定反馈信息的优先级,因此,在图5中,步骤S506以虚线示出,以表示该步骤为可选步骤。
第四种确定方式,与数据包对应的反馈信息的优先级可以根据发送该数据包的终端装置确定。
具体来讲,第一终端装置可以统计其未向其他终端装置发送反馈信息的次数。未向其他终端装置发送反馈信息的次数是指在不同反馈时隙上的反馈次数,即在一个反馈时隙上如果对至少一个数据传输有反馈,则记录一次反馈次数,如果没有反馈,记录一次无反馈次数,不考虑数据包个数。例如,终端装置2向终端装置1发送了2个数据包,这2个数据包在同一个时隙上反馈,此时如果终端装置1未向终端装置2发送与对这2个数据包中任意一个数据包对应的反馈信息,则记录其未向终端装置2发送反馈信息的次数为1次。
第一终端装置可以根据其未向其他终端装置发送反馈信息的次数,将发送数据包的终端装置分为两类,第一类终端装置包括第一终端装置未向其发送反馈信息的次数大于或等于第一门限的终端装置,第二类终端装置包括第一终端装置未向其发送反馈信息的次数小于该第一门限的终端装置,或者,该第一类终端装置和第二类终端装置也可以理解为,第一类终端装置中的每个终端装置未接收到第一终端装置发送的反馈信息的次数大于或等于第一门限,第二类终端装置中的每个终端装置未接收到第一终端装置发送的反馈信息的次数小于所述第一门限。该第一门限可以是预先设置的或者网络装置指示的,例如,该第一门限可以为10次或者5次等,在此不作限制。
然后,第一终端装置根据发送每个数据包的终端装置属于第一类终端装置还是第二类终端装置,将接收到的数据包分为两部分,例如,分为第五部分数据包和第六部分数据包,其中,第五部分数据包是来自第一类终端装置的,第六部分数据包是来自第二类终端装置的。从而,第一终端装置确定该至少两个反馈信息中针对第五部分数据包的第五部分反馈 信息的优先级高于针对第六部分数据包的第六部分反馈信息的优先级。
例如,终端装置1通过上述方式,确定数据包4和数据包5来自第二类终端装置,数据包1~数据包3来自第一类终端装置,则终端装置1确定HARQ信息1~HARQ信息3的优先级高于HARQ信息4或HARQ信息5的优先级。
由于若某一个终端装置多次未接收反馈信息,则其会判断该无线链路失败,从而触发无线链路失败的处理流程,因此,在上述技术方案中,为了尽可能地减少发送数据包的终端装置产生上述误判,则可以优先对第一类终端装置进行反馈。
第五种确定方式,与数据包对应的反馈信息的优先级可以根据与该数据包对应的控制信息确定。
在这种确定方式下,在步骤S505之前,本申请实施例中的方法还包括:
S507、每个第二终端装置发送与数据包对应的第二控制信息,第一终端装置接收该至少一个第二控制信息。
在本申请实施例中,每个第二控制信息包括第一指示信息,该第一指示信息与至少一个数据包对应,该第一指示信息用于指示与该至少一个数据包对应的至少一个反馈信息的优先级。
需要说明的是,第二控制信息与数据包的对应关系可以是一一对应关系,也就是说,一个第二控制信息用于指示一个数据包的反馈信息的优先级。例如,终端装置2向终端装置1发送数据包2~数据包4这3个数据包,则终端装置2可以在发送数据包的同一时刻(或者也可以是在每次发送数据包之前),向终端装置1发送一个第二控制信息,即,终端装置2同时向终端装置1发送数据包2和与数据包2对应的第二控制信息,然后,在发送数据包3和与数据包3对应的第二控制信息,以此类推,直到发完这3个数据包。在这种情况下,终端装置发送的第二控制信息的数量与其要发送的数据包的数量相同。或者,第二控制信息与数据包的对应关系也可以是一对多的对应关系,也就是说,一个第二控制信息用于指示多个数据包的反馈信息的优先级。例如,终端装置2向终端装置1发送数据包2~数据包4这3个数据包,则终端装置2可以在发送数据包2的同一时刻,向终端装置1发送一个第二控制信息,该第二控制信息用于指示与数据包2~数据包4对应的反馈信息的优先级。在这种情况下,无论终端装置要发送多少个数据包,其只用发送一个第二控制信息。
该第二控制信息与第三种确定方式中的第一控制信息可以是不同的控制信息,也可以是同一个控制信息,在此不作限制。
另外,需要说明的是,该控制信息可以是在PSCCH上发送的侧行控制信息(sidelink control information,SCI)。例如,在SCI中增加一个字段,通过该字段来指示与其发送的数据包对应的反馈信息的优先级。或者,该控制信息也可以用于指示其发送的数据包的优先级,从而第一终端装置根据数据包的优先级来确定与其对应的反馈信息的优先级。例如,可以通过LTE-V中的邻近通信数据包优先级(ProSe per-packet priority,PPPP)值来指示,或者可以通过NR-V2X中的PPPP或服务质量(quality of service,QoS)值来指示。或者,该控制信息也可以携带在数据包的包头中,在这种情况下,步骤S507则不用执行。
当第一终端装置获取与数据包对应的控制信息后,则根据该控制信息中的第一指示信息确定与每个反馈信息对应的优先级。例如,与数据包1对应的第一指示信息指示与数据包1对应的HARQ信息1的优先级为优先级1,与数据包2对应的第一指示信息指示与数据包2对应的HARQ信息2的优先级为优先级2,等等,在此不一一列举。
在上述技术方案中,第一终端装置可以根据第一指示信息来确定每个反馈信息的优先级,从而使得优先级高的数据包可以及时接收到反馈信息。
需要说明的是,步骤S507中的第二控制信息也可以是和步骤S503中的至少两个数据包可以是分开发送,也可以是一起发送。当第二控制信息和至少两个数据包分开发送时,则分别执行步骤S503和步骤S507;当第二控制信息和至少两个数据包一起发送,则步骤S507可以与步骤S503同时执行,或者,这两个步骤可以合并为一个步骤。
另外,步骤S507是可选步骤,例如,当第一终端装置不使用第五种确定方式确定反馈信息的优先级,因此,在图5中,步骤S507以虚线示出,以表示该步骤为可选步骤。
第六种确定方式,可以将上述第一种确定方式~第五种确定方式中的多个确定方式进行结合,以确定每个反馈信息的优先级。
作为一种示例,可以将第一种确定方式和第四种确定方式结合。具体来讲,第一终端装置首先根据第一种确定方式,与第一部分数据包对应的第一部分反馈信息的优先级高于与第二部分数据包对应的第二部分反馈信息的优先级。然后,针对第一部分反馈信息和第二部分反馈信息,分别采用第四种确定方式,确定每个部分反馈信息中的反馈信息的优先级。例如,针对第一部分反馈信息,从该第一部分反馈信息中确定与来自第一类终端装置的数据包对应的反馈信息,以及与来自第二类终端装置的数据包对应的反馈信息,将第一部分反馈信息划分为两个子部分,例如,第一子部分反馈信息为与来自第一类终端装置的数据包对应的反馈信息,第二子部分反馈信息为与来自第二类终端装置的数据包对应的反馈信息,确定第一子部分反馈信息的优先级高于第二子部分反馈信息的优先级。
例如,终端装置1确定HARQ信息1~HARQ信息3为第一部分反馈信息,HARQ信息4和HARQ信息5为第二部分反馈信息,然后,确定HARQ信息1~HARQ信息3中哪些是与来自第一类终端装置的数据包对应的反馈信息,例如,HARQ信息1是与来自第一类终端装置的数据包对应的反馈信息,从而,确定HARQ信息1的优先级高于HARQ信息2或HARQ信息3的优先级。对于第二部分反馈信息,也采用上述确定方式,确定HARQ信息4和HARQ信息5之间的优先级高低顺序,例如,确定HARQ信息4低于HARQ信息5,从而得到如下优先级顺序:数据包1>数据包2=数据包3>数据包5>数据包4。
当然,也可以将其他确定方式进行结合,例如,将第一种确定方式、第二种确定方式以及第三种确定方式进行结合,或者,将第四种确定方式和第五种确定方式进行结合,在此不作限制。多种确定方式进行结合时,确定反馈信息的优先级的过程与前述示例的过程相似,在此不一一说明。
当将多种确定方式结合起来,来确定反馈信息的优先级时,可以提高确定的优先级的精度,以便于第一终端装置更精准地对数据包进行反馈。
当第一终端装置确定每个反馈信息的优先级之后,则根据该优先级,确定发送该至少两个反馈信息中的至少一个反馈信息。
在本申请实施例中,第一终端装置根据发送至少一个反馈信息,包括但不限于如下两种情况。
第一种情况,第一终端装置在一个时域单位上发送该至少两个反馈信息中优先级最高的反馈信息。
作为一种示例,终端装置1确定HARQ信息1~HARQ信息5的优先级顺序为:HARQ信息1>HARQ信息2>HARQ信息3>HARQ信息5>HARQ信息4,则终端装置1确定发送 HARQ信息1。
作为另一种示例,终端装置1确定HARQ信息1~HARQ信息3中的每个HARQ信息的优先级,高于HARQ信息4和HARQ信息5的优先级,从而,终端装置1确定发送HARQ信息1~HARQ信息3的其中的一个HARQ信息。终端装置1可以随机选择,或者,也可以按照其他的规则,该规则可以是根据接收数据包的顺序,选择发送其中一个HARQ信息。例如,终端装置1依次接收数据包1~数据包3,则终端装置1确定发送与数据包1对应的HARQ信息,即HARQ信息1。
第二种情况,第一终端装置在一个时域单位上发送该至少两个反馈信息中的K个反馈信息,该K个反馈信息为该至少两个反馈信息按照优先级从高到低的顺序的前K个反馈信息,K为大于1的整数。
在本申请实施例中,该K的取值可以是终端装置预先配置的,或者也可以是网络装置指示的。该K的取值例如可以为3或4等,在此不作限制。
作为一种示例,终端装置1确定HARQ信息1~HARQ信息3中的每个HARQ信息的优先级,高于HARQ信息4和HARQ信息5的优先级,若K的取值为3,则终端装置1确定发送HARQ信息1~HARQ信息3。
需要说明的是,网络装置可以根据终端装置的能力信息或者其他参数,为终端装置配置其所能支持在同一时域单元上发送的反馈信息的个数,该反馈信息的个数可以标识为K。例如,网络装置可以为每个终端装置配置不同的K的取值,或者,也可以为不同的终端装置配置相同的K的取值,在此不作限制。若该K的取值为1,则终端装置可以采用第一种确定方式发送一个反馈信息,若该K的取值为大于1的整数,则终端装置可以采用第二种确定方式发送至少一个反馈信息。另外,每个终端装置所能支持在同一时域单元上发送的反馈信息的个数也可以是由终端装置自身确定的,例如,可以是预先设置的,在此不作限制。
另外,第一终端装置在生成至少两个反馈信息后,可以将同一个第二终端装置发送的多个数据包的反馈信息进行绑定(bundling)或复用(multiplexing),然后发送该绑定或复用后的反馈信息。在这种情况下,该绑定或复用后的反馈信息的优先级根据其所绑定或复用的多个反馈信息的优先级确定。需要说明的是,绑定或复用后的反馈信息被视为一个反馈信息,因此,该绑定或复用后的反馈信息将作为一个反馈信息与其他的反馈信息进行优先级比较,然后确定是否发送。
作为一种示例,如果是将多个反馈信息绑定发送,则多个反馈信息通过与运算获得绑定后的反馈信息,例如,多个反馈信息中只要有一个反馈信息是NACK信息,则绑定后的反馈信息为NACK信息,只有当多个反馈信息中的每个反馈信息都为ACK信息时,该绑定后的反馈信息为ACK。如果是将多个反馈信息进行复用,则复用后的反馈信道的优先级,可以为该多个反馈信息中优先级最高的反馈信息的优先级,例如,复用HARQ信息2~HARQ信息4,其中HARQ信息2的优先级最高,则复用后的反馈信息的优先级与HARQ信息2的优先级相同。针对绑定后的反馈信息,其优先级的确定方式也可以根据优先级最高的反馈信息来确定。当然,绑定后的反馈信息或复用后的反馈信息也可以根据其他方式确定其对应的优先级及内容,在此不一一举例。
在本申请实施例中,第一终端装置发送至少一个反馈信息之前,还需要确定每个反馈信息的发射功率,然后根据所述每个反馈信息的发射功率,发送所述对应反馈信息。确定 每个反馈信息的发射功率的方式可以包括但不限于如下多种方式。
第一种发射功率确定方式:
第一终端装置确定发送优先级最高的反馈信息,则该反馈信息对应的发射功率可以根据该第一终端装置的PSFCH的功率控制参数确定。例如,网络装置指示PSFCH不做功率控制,则PSFCH的发送功率为P PSFCH=P CMAX,PSFCH,其中,P CMAX,PSFCH为网络装置配置或预配置的PSFCH信道的最大发送功率。又例如,网络装置指示PSFCH采用下行路损进行功控,则PSFCH的发送功率为P PSFCH=min{P CMAX,PSFCH,P DL_PL_PSFCH},其中,P DL_PL_PSFCH为根据下行路损,PSFCH带宽和信噪比需求确定的发送功率,min{,}运算可以P CMAX,PSFCH,P DL_PL_PSFCH的最小值,即如果P CMAX,PSFCH值小于P DL_PL_PSFCH值,则发送功率取P CMAX,PSFCH值,反之,则发送功率取P DL_PL_PSFCH值。又例如,网络装置指示PSFCH采用下行路损和侧行路损进行功控,则PSFCH的发送功率为P PSFCH=min{P CMAX,PSFCH,P DL_PL_PSFCH,P SL_PL_PSFCH},其中,P SL_PL_PSFCH为根据侧行路损,PSFCH带宽和信噪比需求确定的发送功率。
第二种发射功率确定方式:
第一终端装置确定发送K个反馈信息,则第一终端装置首先将该K个反馈信息,按照优先级顺序进行排序。若该K个反馈信息的优先级相同,则第一终端装置可以随机或者根据其它方式对该K个反馈信息进行排序。然后,确定第一终端装置用于发送反馈信息的最大发射功率Pmax。该最大发射功率Pmax可以是网络装置配置的,或者预配置的,或者由第一终端装置根据Uu口下行链路路损计算获得的,在此不作限制。然后,第一终端装置确定该K个反馈信息中的第一个反馈信息的发射功率,具体来讲,第一个反馈信息的发射功率是根据该最大发射功率Pmax和根据第一终端装置的SL链路路损获得的发射功率的较小值确定的,也就是说,若该最大发射功率Pmax小于根据第一终端装置的SL链路路损获得的发射功率,则第一个反馈信息的发射功率为该最大发射功率Pmax,否则,确定第一个反馈信息的发射功率为根据第一终端装置的SL链路路损获得的发射功率。
在确定第一个反馈信息的发射功率之后,计算剩余发送功率,即最大发射功率与第一个反馈信息的发射功率的差值,若该剩余发送功率不小于预设值,则将该剩余发送功率设为最大发送功率Pmax,并采用前述确定第一个反馈信息的发射功率的方法,确定第二个反馈信息的发射功率,再次确定剩余发送功率,然后根据剩余发送功率以及前述方法确定后续反馈信息的发射功率,直至确定了该K个反馈信息中的每个反馈信息的发射功率,或者,该剩余发送功率小于预设值。该预设值可以是终端装置预先设置的,在此不作限制。
需要说明的是,若第一终端装置根据至少两个反馈信息的优先级确定要发送K个反馈信息,但是,采用上述方式确定每个反馈信息的发射功率时,第一终端装置在确定第一个反馈信息的发射功率之后,该剩余发送功率便小于该预设值,在这种情况下,第一终端装置则只发送该K个反馈信息中优先级最高的一个反馈信息。也就是说,第一终端装置发送的反馈信息是根据至少两个反馈信息的优先级、最大发射功率以及SL链路路损这三个因素确定的。
第三种发射功率确定方式:
第一终端装置可以将获取的最大发射功率,平均分配给该K个反馈信息,即每个反馈信道的发射功率为Pmax/K。其中,该最大发射功率与第二种发射功率确定方式中的最大发射功率相同,在此不再赘述。
第四种发射功率确定方式:
第一终端装置确定至少一个反馈信息中每个反馈信息的发射功率,为最大发射功率及与对应反馈信息对应的分配比例的乘积,该分配比例是根据对应反馈信息的优先级确定的。
例如,终端装置1可以预先设置优先级与分配比例的对应关系,如优先级1对应的分配比例为30%,优先级2对应的分配比例为20%,优先级3对应的分配比例为10%。若终端装置1确定发送HARQ信息1~HARQ信息3,其中,HARQ信息1和HARQ信息2的优先级为优先级1,HARQ信息3的优先级为优先级2,则终端装置1确定HARQ信息1和HARQ信息2的发射功率为Pmax*30%,HARQ信息3的发射功率为Pmax*20%。
第五种发射功率确定方式:
第一终端装置确定至少一个反馈信息中每个反馈信息的发射功率,为最大发射功率及与预设的分配比例的乘积,该预设的分配比例是与反馈信息的优先级无关。例如,第一终端装置可以设计固定的发射功率比例为P1,P2,…,PK,其中,P1+P2+…+PK=1,则第一终端装置确定第i个反馈信息的发射功率为Pmax*Pi,i取值为1,…,K。
第一终端装置也可以根据其他方式确定每个反馈信息的发射功率,在此不一一列举。
当第一终端装置确定每个反馈信息的发射功率后,则根据与每个反馈信息对应的发射功率,在同一时域单元(例如时隙3的最后一个符号)上发送该反馈信息。
在上述技术方案中,终端装置在接收多个数据包后,可以根据与该多个数据包对应的多个反馈信息的优先级,确定发送该多个反馈信息中的一个或多个反馈信息,提供了一种终端装置可以对多个数据包进行HARQ反馈的方案。且,根据优先级发送反馈信息可以降低优先级高的业务的传输时延,可以提高侧行链路的资源利用率。
另外,在上述实施例中,以反馈信息为HARQ信息为例对本申请实施例中的方案进行了介绍,在其他的实施例中,也可以采用其他类型的信息作为反馈信息,在此不对反馈信息进行限制。当使用其他类型的信息作为反馈信息时,可以将上述方案中的HARQ信息替换为该其他类型的信息。
进一步,在PSFCH中也可以发送除反馈信息外的信息,例如,可以在PSFCH中发送信道状态信息(channel state information,CSI)等,在这种情况下,在发送多个CSI时,也可以采用上述思想,根据多个CSI的优先级来确定发送至少一个CSI,具体过程可参考上述方案,在此不再赘述。
上述本申请提供的实施例中,分别从第一终端装置、第二终端装置以及网络装置之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能,第一终端装置和第二终端装置(例如,第一个终端装置和第二个终端装置)可以包括硬件结构和/或软件模块,以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行,取决于技术方案的特定应用和设计约束条件。
图7示出了一种终端装置700的结构示意图。其中,终端装置700可以是第一终端装置,能够实现本申请实施例提供的方法中第一终端装置的功能;终端装置700也可以是能够支持第一终端装置实现本申请实施例提供的方法中对应的功能的装置。终端装置700可以是硬件结构、软件模块、或硬件结构加软件模块。终端装置700可以由芯片系统实现。本申请实施例中,芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
终端装置700可以包括处理单元701和收发单元702。
处理单元701可以用于执行图5所示的实施例中的步骤S504,和/或用于支持本文所描述的技术的其它过程。
收发单元702用于终端装置700和其它模块进行通信,其可以是电路、器件、接口、总线、软件模块、收发器或者其它任意可以实现通信的装置。
收发单元702可以用于执行图5所示的实施例中的步骤S501~步骤S503以及步骤S505~步骤S506,和/或用于支持本文所描述的技术的其它过程。
其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
图8示出了一种终端装置800的结构示意图。其中,终端装置800可以是第二终端装置,例如可以是图5所示的第一个第二终端装置或第二个第二终端装置,能够实现本申请实施例提供的方法中第二终端装置的功能;终端装置800也可以是能够支持第二终端装置实现本申请实施例提供的方法中第二终端装置的功能的装置。终端装置800可以是硬件结构、软件模块、或硬件结构加软件模块。终端装置800可以由芯片系统实现。本申请实施例中,芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
终端装置800可以包括处理单元801和收发单元802。
收发单元802用于终端装置800和其它模块进行通信,其可以是电路、器件、接口、总线、软件模块、收发器或者其它任意可以实现通信的装置。
收发单元802可以用于执行图5所示的实施例中的步骤S501~步骤S503以及步骤S505~步骤S507,和/或用于支持本文所描述的技术的其它过程。
处理单元801可以用于控制收发单元802执行图5所示的实施例中由收发单元802所执行的步骤,和/或用于支持本文所描述的技术的其它过程。
其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
如图9所示为本申请实施例提供的终端装置900,其中,终端装置900可以是第一终端装置,能够实现本申请实施例提供的方法中第一终端装置的功能;终端装置900也可以是能够支持第一终端装置实现本申请实施例提供的方法中对应的功能的装置。其中,该终端装置900可以为芯片系统。本申请实施例中,芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
在硬件实现上,上述收发单元702可以为收发器,收发器集成在终端装置900中构成通信接口910。
终端装置900包括至少一个处理器920,用于实现或用于支持终端装置900实现本申请实施例提供的方法中第一用户面功能网元的功能。示例性地,处理器920可以生成与至少两个数据包对应的反馈信息,具体参见方法示例中的详细描述,此处不做赘述。
终端装置900还可以包括至少一个存储器930,用于存储程序指令和/或数据。存储器930和处理器920耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接,可以是电性,机械或其它的形式,用于装置、单元或模块之间的信息交互。处理器920可能和存储器930协同操作。处理器920可能执行存储器930中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
终端装置900还可以包括通信接口910,用于通过传输介质和其它设备进行通信,从而用于装置900中的装置可以和其它设备进行通信。示例性地,该其它设备可以是第二终端装置。处理器920可以利用通信接口910收发数据。通信接口910具体可以是收发器。
本申请实施例中不限定上述通信接口910、处理器920以及存储器930之间的具体连接介质。本申请实施例在图9中以存储器930、处理器920以及通信接口910之间通过总线940连接,总线在图9中以粗线表示,其它部件之间的连接方式,仅是进行示意性说明,并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图9中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中,处理器920可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中,存储器930可以是非易失性存储器,比如硬盘(hard disk drive,HDD)或固态硬盘(solid-state drive,SSD)等,还可以是易失性存储器(volatile memory),例如随机存取存储器(random-access memory,RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置,用于存储程序指令和/或数据。
如图10所示为本申请实施例提供的终端装置1000,其中,终端装置1000可以是第二终端装置,能够实现本申请实施例提供的方法中第二终端装置的功能;终端装置1000也可以是能够支持第二终端装置实现本申请实施例提供的方法中第二终端装置的功能的装置。其中,该终端装置1000可以为芯片系统。本申请实施例中,芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
在硬件实现上,上述收发单元802可以为收发器,收发器集成在终端装置1000中构成通信接口1010。
终端装置1000包括至少一个处理器1020,用于实现或用于支持终端装置1000实现本申请实施例提供的方法中会话管理功能网元的功能。示例性地,处理器1020可以控制收发器发送至少两个数据包,具体参见方法示例中的详细描述,此处不做赘述。
终端装置1000还可以包括至少一个存储器1030,用于存储程序指令和/或数据。存储器1030和处理器1020耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接,可以是电性,机械或其它的形式,用于装置、单元或模块之间的信息交互。处理器1020可能和存储器1030协同操作。处理器1020可能执行存储器1030中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
终端装置1000还可以包括通信接口1010,用于通过传输介质和其它设备进行通信,从而用于装置1000中的装置可以和其它设备进行通信。示例性地,该其它设备可以是终端。处理器1020可以利用通信接口1010收发数据。通信接口1010具体可以是收发器。
本申请实施例中不限定上述通信接口1010、处理器1020以及存储器1030之间的具体连接介质。本申请实施例在图10中以存储器1030、处理器1020以及通信接口1010之间通过总线1040连接,总线在图10中以粗线表示,其它部件之间的连接方式,仅是进行示 意性说明,并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图10中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中,处理器1020可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中,存储器1030可以是非易失性存储器,比如硬盘(hard disk drive,HDD)或固态硬盘(solid-state drive,SSD)等,还可以是易失性存储器(volatile memory),例如随机存取存储器(random-access memory,RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置,用于存储程序指令和/或数据。
需要说明的是,上述实施例中的终端装置可以是终端也可以是电路,也可以是应用于终端中的芯片或者其他具有上述终端功能的组合器件、部件等。当装置是终端时收发单元可以是收发器,可以包括天线和射频电路等,处理模块可以是处理器,例如:中央处理单元(central processing unit,CPU)。当装置是具有上述终端功能的部件时,收发单元可以是射频单元,处理模块可以是处理器。当装置是芯片系统时,收发单元可以是芯片系统的输入输出接口、处理模块可以是芯片系统的处理器。
图11示出了一种简化的终端装置的结构示意图。便于理解和图示方便,图11中,终端装置以手机作为例子。如图11所示,终端装置包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理,以及对终端装置进行控制,执行软件程序,处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是,有些种类的终端装置可以不具有输入输出装置。
当需要发送数据时,处理器对待发送的数据进行基带处理后,输出基带信号至射频电路,射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端装置时,射频电路通过天线接收到射频信号,将射频信号转换为基带信号,并将基带信号输出至处理器,处理器将基带信号转换为数据并对该数据进行处理。为便于说明,图11中仅示出了一个存储器和处理器。在实际的终端装置产品中,可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置,也可以是与处理器集成在一起,本申请实施例对此不做限制。
在本申请实施例中,可以将具有收发功能的天线和射频电路视为终端装置的收发单元,将具有处理功能的处理器视为终端装置的处理单元。如图11所示,终端装置包括收发单元1110和处理单元1120。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器,处理单板,处理模块、处理装置等。可选的,可以将收发单元1110中用于 实现接收功能的器件视为接收单元,将收发单元1110中用于实现发送功能的器件视为发送单元,即收发单元1110包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解,收发单元1110用于执行上述方法实施例中终端装置侧的发送操作和接收操作,处理单元1120用于执行上述方法实施例中终端装置上除了收发操作之外的其他操作。
例如,在一种实现方式中,收发单元1110可以用于执行图5所示的实施例中的步骤S501~步骤S503以及步骤S505~步骤S506,和/或用于支持本文所描述的技术的其它过程。处理单元1120,用于执行图5所示的实施例中的步骤S504,和/或用于支持本文所描述的技术的其它过程。
例如,在另一种实现方式中,收发单元1110可以用于执行图5所示的实施例中的步骤S501~步骤S503以及步骤S505~步骤S507,和/或用于支持本文所描述的技术的其它过程。处理单元1120,可以用于控制收发单元802执行图5所示的实施例中由收发单元802所执行的步骤,和/或用于支持本文所描述的技术的其它过程。
当该终端装置为芯片时,该芯片包括收发单元和处理单元。其中,收发单元可以是输入输出电路、通信接口;处理单元为该芯片上集成的处理器或者微处理器或者集成电路。
本实施例中,可以参照图12所示的设备。作为一个例子,该设备可以完成类似于图11中处理单元1120的功能。在图12中,该设备包括处理器1210,发送数据处理器1220,接收数据处理器1230。上述实施例中的处理单元701或处理单元801可以是图12中的该处理器1210,并完成相应的功能。上述实施例中的收发单元702或收发单元802可以是图12中的发送数据处理器1220,和/或接收数据处理器1230。虽然图12中示出了信道编码器、信道解码器,但是可以理解这些模块并不对本实施例构成限制性说明,仅是示意性的。
图13示出本实施例的另一种形式。终端装置1300中包括调制子系统、中央处理子系统、周边子系统等模块。本实施例中的终端装置可以作为其中的调制子系统。具体的,该调制子系统可以包括处理器1303,接口1304。其中处理器1303完成上述处理单元701或处理单元801的功能,接口1304完成上述收发单元702或收发单元802的功能。作为另一种变形,该调制子系统包括存储器1306、处理器1303及存储在存储器1306上并可在处理器上运行的程序,该处理器1303执行该程序时实现上述方法实施例中第一终端装置或第二终端装置的方法。需要注意的是,所述存储器1306可以是非易失性的,也可以是易失性的,其位置可以位于调制子系统内部,也可以位于处理装置1300中,只要该存储器1306可以连接到所述处理器1303即可。
本申请实施例提供的一种通信系统的结构示意图可参见图14,具体的,通信系统1400包括第一终端装置和第二终端装置,可选的,还包括网络装置,或者还可以包括更多个第一终端装置和第二终端装置,在图14中以一个第一终端装置和一个第二终端装置为例。
所述第一终端装置和第二终端装置分别用于实现上述图5相关装置的功能。具体请参考上述方法实施例中的相关描述,这里不再赘述。
本申请实施例中还提供一种计算机可读存储介质,包括指令,当其在计算机上运行时,使得计算机执行图5中第一终端装置或第二终端装置执行的方法。
本申请实施例中还提供一种计算机程序产品,包括指令,当其在计算机上运行时,使 得计算机执行图5中第一终端装置或第二终端装置执行的方法。
本申请实施例提供了一种芯片系统,该芯片系统包括处理器,还可以包括存储器,用于实现前述方法中第一终端装置或第二终端装置的功能。该芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
本申请实施例提供的方法中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,简称DSL)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,数字视频光盘(digital video disc,简称DVD))、或者半导体介质(例如,SSD)等。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (29)

  1. 一种反馈信息的传输方法,其特征在于,包括:
    第一终端装置在侧行链路上接收至少两个数据包;
    所述第一终端装置根据至少两个反馈信息的优先级,发送至少一个反馈信息,所述至少一个反馈信息属于所述至少两个反馈信息,所述至少两个反馈信息为针对所述至少两个数据包的反馈信息。
  2. 根据权利要求1所述的方法,其特征在于,所述第一终端装置根据至少两个反馈信息的优先级,发送至少一个反馈信息,包括:
    所述第一终端装置在一个时域单位上发送所述至少两个反馈信息中优先级最高的反馈信息;或,
    所述第一终端装置在所述时域单位上发送所述至少两个反馈信息中的K个反馈信息,所述K个反馈信息为所述至少两个反馈信息按照优先级从高到低的顺序的前K个反馈信息,K为大于1的整数。
  3. 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:
    所述第一终端装置接收与所述至少两个数据包对应的至少一个控制信息,所述至少一个控制信息中每个控制信息包括第一指示信息,所述第一指示信息与至少一个数据包对应,所述第一指示信息用于指示与所述至少一个数据包对应的至少一个反馈信息的优先级。
  4. 根据权利要求1-3中任一项所述的方法,其特征在于,所述至少两个反馈信息中的第一部分反馈信息的优先级高于第二部分反馈信息的优先级;
    其中,所述第一部分反馈信息为针对第一部分数据包的至少一个反馈信息,所述第二部分反馈信息为针对第二部分数据包的至少一个反馈信息,所述至少两个数据包包括第一部分数据包和第二部分数据包,所述第一部分数据包包括成功译码的数据包,所述第二部分数据包包括未成功译码的数据包。
  5. 根据权利要求1-4中任一项所述的方法,其特征在于,所述至少两个反馈信息中的第三部分反馈信息的优先级高于第四部分反馈信息的优先级;
    其中,所述第三部分反馈信息为针对第三部分数据包的至少一个反馈信息,所述第四部分反馈信息为针对第四部分数据包的至少一个反馈信息,所述至少两个数据包包括第三部分数据包和第四部分数据包,所述第三部分数据包包括非最后一次重传的数据包,所述第四部分数据包包括最后一次重传的数据包。
  6. 根据权利要求1-5中任一项所述的方法,其特征在于,所述至少两个反馈信息中的第五部分反馈信息的优先级高于第六部分反馈信息的优先级;
    其中,所述第五部分反馈信息为针对第五部分数据包的至少一个反馈信息,所述第六部分反馈信息为针对第六部分数据包的至少一个反馈信息,所述第五部分数据包是来自第一类终端装置的,所述第六部分数据包是来自第二类终端装置的,所述第一类终端装置中的每个终端装置未接收到所述第一终端装置发送的反馈信息的次数大于或等于第一门限,所述第二类终端装置中的每个终端装置未接收到所述第一终端装置发送的反馈信息的次数小于所述第一门限。
  7. 根据权利要求1-6中任一项所述的方法,其特征在于,所述第一终端装置根据至少两个反馈信息的优先级,发送至少一个反馈信息,包括:
    所述第一终端装置确定所述至少一个反馈信息中每个反馈信息的发射功率,为最大发射功率及与对应反馈信息对应的分配比例的乘积,所述分配比例是根据所述对应反馈信息的优先级确定的,所述最大发射功率是预配置的或由网络装置配置的或根据下行链路的路损确定的;
    所述第一终端装置根据所述每个反馈信息的发射功率,发送所述对应反馈信息。
  8. 根据权利要求1-7中任一项所述的方法,其特征在于,在所述第一终端装置在侧行链路上接收至少两个数据包之后,所述方法还包括:
    所述第一终端装置从所述至少两个数据包中确定第一数据包,所述第一数据包为重传的数据包,且所述第一数据包携带的进程号与第二数据包相同,所述第二数据包是在所述第一数据包之前接收且成功译码的数据包;
    所述第一终端装置丢弃所述第一数据包。
  9. 根据权利要求1-7中任一项所述的方法,其特征在于,在发送至少一个反馈信息之前,所述方法还包括:
    所述第一终端装置将获取的最大发射功率平均分配给所述至少一个反馈信息,所述获取的最大发射功率是所述第一终端装置用于发送所述至少一个反馈信息所能使用的最大发射功率。
  10. 根据权利要求1-7中任一项所述的方法,其特征在于,所述第一终端装置用于发送所述至少一个反馈信息的功率之和小于或等于所述第一终端装置获取的最大发射功率,所述获取的最大发射功率是所述第一终端装置用于发送所述至少一个反馈信息所能使用的最大发射功率。
  11. 根据权利要求9所述的方法,其特征在于,所述第一终端装置用于发送所述至少一个反馈信息中的每个反馈信息的发射功率小于或等于所述最大发射功率与所述至少一个反馈信息的数量的比值。
  12. 一种反馈信息的传输方法,其特征在于,包括:
    第二终端装置在侧行链路上发送至少两个数据包;
    所述第二终端装置接收至少一个反馈信息,所述至少一个反馈信息为针对所述至少两个数据包中的至少一个数据包的反馈信息。
  13. 根据权利要求12所述的方法,其特征在于,所述方法还包括:
    所述第二终端装置发送与所述至少两个数据包对应的至少一个控制信息,所述至少一个控制信息中的每个控制信息包括第一指示信息,所述第一指示信息与至少一个数据包对应,所述第一指示信息用于指示与所述至少一个数据包对应的至少一个反馈信息的优先级。
  14. 一种终端装置,其特征在于,包括收发单元和处理单元,其中:
    所述收发单元,用于在侧行链路上接收至少两个数据包;
    所述处理单元,用于根据至少两个反馈信息的优先级,控制所述收发单元发送至少一个反馈信息,所述至少一个反馈信息属于所述至少两个反馈信息,所述至少两个反馈信息为针对所述至少两个数据包的反馈信息。
  15. 根据权利要求14所述的装置,其特征在于,所述处理单元根据至少两个反馈信息中每个反馈信息的优先级,控制所述收发单元发送至少一个反馈信息时,具体用于:
    所述处理单元控制所述收发单元在一个时域单位上发送所述至少两个反馈信息中优先级最高的反馈信息;或,
    所述处理单元控制所述收发单元在所述时域单位上发送所述至少两个反馈信息中的K个反馈信息,所述K个反馈信息为将所述至少两个反馈信息按照优先级从高到低的顺序的前K个反馈信息,K为大于1的整数。
  16. 根据权利要求14或15所述的装置,其特征在于,所述收发单元还用于:
    接收与所述至少两个数据包对应的至少一个控制信息,所述至少一个控制信息中每个控制信息包括第一指示信息,所述第一指示信息与至少一个数据包对应,所述第一指示信息用于指示与所述至少一个数据包对应的至少一个反馈信息的优先级。
  17. 根据权利要求14-16中任一项所述的装置,其特征在于,所述至少两个反馈信息中的第一部分反馈信息的优先级高于第二部分反馈信息的优先级;
    其中,所述第一部分反馈信息为针对第一部分数据包的至少一个反馈信息,所述第二部分反馈信息为针对第二部分数据包的至少一个反馈信息,所述至少两个数据包包括第一部分数据包和第二部分数据包,所述第一部分数据包包括成功译码的数据包,所述第二部分数据包包括未成功译码的数据包。
  18. 根据权利要求14-17中任一项所述的装置,其特征在于,所述至少两个反馈信息中的第三部分反馈信息的优先级高于第四部分反馈信息的优先级;
    其中,所述第三部分反馈信息为针对第三部分数据包的至少一个反馈信息,所述第四部分反馈信息为针对第四部分数据包的至少一个反馈信息,所述至少两个数据包包括第三部分数据包和第四部分数据包,所述第三部分数据包包括非最后一次重传的数据包,所述第四部分数据包包括最后一次重传的数据包。
  19. 根据权利要求17-18中任一项所述的装置,其特征在于,所述至少两个反馈信息中的第五部分反馈信息的优先级高于第六部分反馈信息的优先级;
    其中,所述第五部分反馈信息为针对第五部分数据包的至少一个反馈信息,所述第六部分反馈信息为针对第六部分数据包的至少一个反馈信息,所述第五部分数据包是来自第一类终端装置的,所述第六部分数据包是来自第二类终端装置的,所述第一类终端装置中的每个终端装置未接收到所述第一终端装置发送的反馈信息的次数大于或等于第一门限,所述第一类终端装置中每个终端装置未收到所述第一终端装置发送的反馈信息的次数小于所述第一门限。
  20. 根据权利要求14-19中任一项所述的装置,其特征在于,所述处理单元根据至少两个反馈信息的优先级,控制所述收发单元发送至少一个反馈信息,具体用于:
    确定所述至少一个反馈信息中每个反馈信息的发射功率,为最大发射功率及与对应反馈信息对应的分配比例的乘积,所述分配比例是根据所述对应反馈信息的优先级确定的,所述最大发射功率是预配置的或由网络装置配置的或根据下行链路的路损确定的;
    控制所述收发单元根据所述每个反馈信息的发射功率,发送所述对应反馈信息。
  21. 根据权利要求14-20中任一项所述的装置,其特征在于,所述处理单元还用于:
    从所述至少两个数据包中确定第一数据包,所述第一数据包为重传的数据包,且所述第一数据包携带的进程号与第二数据包相同,所述第二数据包是在所述第一数据包之前接收且成功译码的数据包;
    丢弃所述第一数据包。
  22. 根据权利要求14-20中任一项所述的装置,其特征在于,所述处理单元还用于:
    将获取的最大发射功率平均分配给所述至少一个反馈信息,所述获取的最大发射功率 是所述第一终端装置用于发送所述至少一个反馈信息所能使用的最大发射功率。
  23. 根据权利要求14-20中任一项所述的装置,其特征在于,所述收发单元用于发送所述至少一个反馈信息的功率之和小于或等于所述第一终端装置获取的最大发射功率,所述获取的最大发射功率是所述第一终端装置用于发送所述至少一个反馈信息所能使用的最大发射功率。
  24. 根据权利要求22所述的装置,其特征在于,所述收发单元用于发送所述至少一个反馈信息中的每个反馈信息的发射功率小于或等于所述最大发射功率与所述至少一个反馈信息的数量的比值。
  25. 一种终端装置,其特征在于,包括收发单元和处理单元,其中:
    所述收发单元,用于在所述处理单元的控制下,在侧行链路上发送至少两个数据包;以及,
    用于在所述处理单元的控制下,接收至少一个反馈信息,所述至少一个反馈信息为针对所述至少两个数据包中的至少一个数据包的反馈信息。
  26. 根据权利要求25所述的装置,其特征在于,所述收发单元还用于:
    发送与所述至少两个数据包对应的至少一个控制信息,所述至少一个控制信息中的每个控制信息包括第一指示信息,所述第一指示信息与至少一个数据包对应,所述第一指示信息用于指示与所述至少一个数据包对应的至少一个反馈信息的优先级。
  27. 一种终端装置,其特征在于,所述终端装置包括处理器和存储器,所述处理器用于执行存储在所述存储器上的指令,当所述指令被运行时,使得所述装置执行如权利要求1~11或12~13中任一项所述的方法。
  28. 一种计算机可读存储介质,其特征在于,包括指令,当所述指令被执行时,实现如权利要求1~11或12~13中任一项所述的方法。
  29. 一种计算机程序产品,其特征在于,当其在计算机上运行时,使得计算机执行如权利要求1~11或12~13中任一项所述的方法。
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