WO2020238285A1 - 一种数据重传方法以及装置 - Google Patents

一种数据重传方法以及装置 Download PDF

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Publication number
WO2020238285A1
WO2020238285A1 PCT/CN2020/075249 CN2020075249W WO2020238285A1 WO 2020238285 A1 WO2020238285 A1 WO 2020238285A1 CN 2020075249 W CN2020075249 W CN 2020075249W WO 2020238285 A1 WO2020238285 A1 WO 2020238285A1
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WIPO (PCT)
Prior art keywords
ack
information
base station
terminal
data packet
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PCT/CN2020/075249
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English (en)
French (fr)
Inventor
耿瑞全
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20814688.6A priority Critical patent/EP3961947B1/en
Publication of WO2020238285A1 publication Critical patent/WO2020238285A1/zh
Priority to US17/534,609 priority patent/US20220085917A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1642—Formats specially adapted for sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1628—List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1635—Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling

Definitions

  • This application relates to the field of communications, and in particular to a data retransmission method and device.
  • the basic architecture of the Internet of Things includes three levels: perception and recognition layer, network layer, and application layer.
  • the perception and recognition layer is actually the underlying technology, which is the beginning of everything in the Internet of Things. It is mainly used by various sensors to obtain data and send the data to the application layer through the network layer.
  • the application layer processes the data and displays the results of the processing. .
  • the RLC cannot retransmit in time according to the RLC status report, and finally the RLC reaches the maximum number of retransmissions, which causes the user to drop.
  • an embodiment of the present application provides a retransmission method, including: a base station receives first ACK-SN information sent by a terminal, where the first ACK-SN information is included in an RLC status report, and the first ACK-SN -The SN information carries the sequence number of the first data packet; then the base station is recording the first ACK-SN information and the number of times the first ACK-SN information is received; if the number of times the first ACK-SN information is received reaches the preset number If the value is set, the base station retransmits the first data packet to the terminal, where the preset value does not exceed the maximum number of retransmissions of the base station and is greater than 1.
  • the ACK-SN information is used to indicate that the terminal receives a data packet. For example, if the terminal receives a data packet with a sequence number of 1, the ACK-SN information sent to the base station is "ACK-SN2( Used to indicate that the terminal receives the data packet before the sequence number 2)”; if the terminal does not receive the data packet with the sequence number 2 at the next moment (that is, the data packet with the sequence number 2 is lost), it will send to the base station The ACK-SN information is still "ACK-SN2"; at the next moment the terminal receives a data packet with sequence number 3, and the ACK-SN information sent to the base station is still "ACK-SN2". From the above situation, the ACK-SN information can be used to indicate the sequence number of the lost data packet, so that the base station can effectively retransmit the lost data packet.
  • the base station introduces a duplicate ACK-SN under the condition that the transmission resources of the status report are limited, so as to retransmit the lost data packets in time to prevent the user from dropping.
  • the base station may also allocate a target transmission resource for the status report, wherein the target transmission resource satisfies the status report carrying the ACK-SN Information and NACK-SN information; then the base station receives the first ACK-SN information and NACK-SN information sent by the terminal; finally, the base station retransmits to the terminal according to the first ACK-SN information and the NACK-SN information The first data packet.
  • the status report carries ACK-SN information and NACK-SN information
  • the specific situation is as follows: if the terminal receives a data packet with a sequence number of 1, the status report that the terminal replies to the base station is " ACK-SN2"; at the next moment, if the terminal does not receive a data packet with sequence number 2, the status report that the terminal replies to the base station is "ACK-SN2, NACK-SN2 (used to indicate that the terminal has received the sequence The data packet before the number 2 is not received the data packet with the sequence number 2)"; at the next moment, the terminal receives the data packet with the sequence number 3, and the status report that the terminal replies to the base station is "ACK- SN4, NACK-SN2 (used to indicate that the terminal received the data before the sequence number 4, but did not receive the data with the sequence number 2)".
  • This can effectively indicate the sequence number of the lost data packet, thereby effectively realizing the retransmission of the lost data packet.
  • the base station when the base station receives the ACK-SN information returned by the terminal, if the number of times the first ACK-SN information is received has not reached the preset value and the base station receives the second ACK-SN information, wherein, the second ACK-SN information carries the sequence number of the second data packet, and the base station updates the first ACK-SN information to the second ACK-SN information, and records the information of the second ACK-SN information The number of receptions; then when the base station has received the second ACK-SN information cumulatively to the preset value, the base station retransmits the second data packet according to the second ACK-SN information.
  • the second ACK-SN information has the same function as the first ACK-SN information (both are used to indicate that the terminal receives a data packet), but the sequence carried in the second ACK-SN information The number is different from the sequence number carried in the first ACK-SN information.
  • the data packet corresponding to the sequence number carried in the first ACK-SN information is not lost, so the base station can delete the first ACK-SN information in time, effectively using storage resources.
  • the base station receives the third ACK-SN information sent by the terminal, and the third ACK-SN information will be It will carry a new sequence number, which is used to indicate the status of the terminal receiving data packets. This can inform the base station of the data packet reception in time.
  • an embodiment of the present application provides a data retransmission device, which has the function of implementing the behavior of the base station in the first aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the device includes units or modules for performing each step of the first aspect above.
  • the device includes: a receiving module for receiving first ACK-SN information sent by a terminal, where the first ACK-SN information is included in a status report; a processing module for recording the first ACK-SN information and The number of times the first ACK-SN information is received; a retransmission module, configured to send the first ACK-SN information to the terminal when the cumulative number of times the first ACK-SN information has been received reaches a preset value Retransmit the first data packet, and the preset value does not exceed the maximum number of retransmissions.
  • it also includes a storage module for storing necessary program instructions and data for the base station.
  • the device includes a processor and a transceiver, and the processor is configured to support the base station to perform corresponding functions in the method provided in the first aspect.
  • the transceiver is used to instruct the communication between the base station and the terminal, and send the information or instructions involved in the above method to the terminal.
  • this device may further include a memory, which is used for coupling with the processor and stores necessary program instructions and data for the base station.
  • the chip when the device is a chip in a base station, the chip includes: a processing module and a transceiver module.
  • the processing module may be a processor, for example, and the processor is used to record the first ACK- SN information and the number of times of receiving the first ACK-SN information
  • the transceiver module may be, for example, an input/output interface, pin or circuit on the chip, and transmits the first data packet (data packet to be retransmitted) To other chips or modules coupled with this chip.
  • the processing module can execute computer-executable instructions stored in the storage unit to support the base station to execute the method provided in the first aspect.
  • the storage unit may be a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip, such as a read-only memory (read-only memory, Referred to as ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM for short), etc.
  • ROM read-only memory
  • RAM random access memory
  • the device includes a processor, a baseband circuit, a radio frequency circuit, and an antenna.
  • the processor is used to control the functions of each circuit part, and the baseband circuit is used to generate data packets to be retransmitted, which are processed by the radio frequency circuit for analog conversion, filtering, amplification and up-conversion, and then sent to the terminal via the antenna.
  • the device further includes a memory, which stores program instructions and data necessary for the base station.
  • the processor mentioned in any of the above can be a general-purpose central processing unit (Central Processing Unit, CPU for short), microprocessor, application-specific integrated circuit (ASIC for short), or one or A plurality of integrated circuits used to control the program execution of the method for coordinated allocation of channel resources in the above aspects.
  • CPU Central Processing Unit
  • ASIC application-specific integrated circuit
  • an embodiment of the present application provides a computer-readable storage medium, where the computer storage medium stores computer instructions, and the computer instructions are used to execute the method described in any possible implementation manner in the first aspect.
  • embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in any possible implementation manner in the first aspect.
  • an embodiment of the present application provides a communication system, which includes the base station and terminal described in the foregoing aspect.
  • the base station introduces a repeated ACK-SN under the condition that the transmission resources of the status report are limited, so as to retransmit the lost data packets in time to prevent users from dropping.
  • Figure 1 is a system architecture diagram of the Internet of Things in an embodiment of the application
  • FIG. 3 is a schematic diagram of another embodiment of a data retransmission method in an embodiment of this application.
  • FIG. 4 is a schematic diagram of an embodiment of a data retransmission device in an embodiment of the application.
  • FIG. 5 is a schematic diagram of another embodiment of a data retransmission device in an embodiment of this application.
  • Fig. 6 is a schematic diagram of an embodiment of a communication system in an embodiment of the application.
  • the embodiments of the present application provide a data retransmission method and device, which are used to retransmit lost data packets in time to prevent users from being disconnected.
  • the Internet of Things includes three levels: perception and recognition layer, network layer, and application layer.
  • the perception and recognition layer is actually the underlying technology, which is the beginning of everything in the Internet of Things. It is mainly used by various sensors to obtain data and send the data to the application layer through the network layer.
  • the application layer processes the data and displays the results of the processing. .
  • the perceptual recognition layer may include various types.
  • the system has a maximum number of retransmissions.
  • the base station In order to prevent the loss of data packets from causing users to be disconnected, the base station needs to retransmit the lost data to the terminal before the maximum number of retransmissions. Therefore, the preset value needs to be less than the maximum number of retransmissions. Passing times.
  • the base station receives the third ACK-SN information sent by the terminal, and the third ACK-SN information will be It will carry a new sequence number, which is used to indicate the status of the terminal receiving data packets. This can inform the base station of the data packet reception in time.
  • the base station introduces a duplicate ACK-SN under the condition that the transmission resources of the status report are limited, so as to retransmit the lost data packets in time to prevent the user from dropping.
  • the foregoing embodiment is described from the perspective of a single ACK-SN information.
  • the following describes the embodiment of the present application from the perspective of multiple ACK-SN information.
  • the retransmission method in the embodiment of the present application Another embodiment includes:
  • the base station receives first ACK-SN information sent by a terminal, where the first ACK-SN information is included in a status report, and the first ACK-SN information carries a sequence number of a first data packet;
  • the terminal will feed back an acknowledgement message to the base station.
  • the first ACK-SN information received by the base station is used for description. It is understandable that the ACK-SN information is used to indicate that the terminal receives a data packet.
  • the ACK-SN information sent to the base station is "ACK-SN2( Used to indicate that the terminal receives the data packet before the sequence number 2)"; if the terminal does not receive the data packet with the sequence number 2 at the next moment (that is, the data packet with the sequence number 2 is lost), it will send to the base station
  • the ACK-SN information is still "ACK-SN2"; at the next moment the terminal receives a data packet with sequence number 3, and the ACK-SN information sent to the base station is still "ACK-SN2". It can be seen from the above situation that the ACK-SN information can be used to indicate the sequence number of the lost data packet, so that the base station can effectively retransmit the lost data packet.
  • the base station records the first ACK-SN information and the number of times the first ACK-SN information is received.
  • the base station records the first ACK-SN information after receiving the first ACK-SN information, and counts the number of times of receiving the first ACK-SN information.
  • the base station will continuously receive ACK-SN information. At this time, the base station can judge every ACK-SN information received. If the ACK-SN information received at the previous moment is the same, the number of receptions is cumulatively increased by 1, and the cycle is repeated. For example, if the first ACK-SN information received by the base station at the first time is "ACK-SN2", the base station records the "ACK-SN2" and counts it as 1. At the second time, the base station receives The received ACK-SN information is "ACK-SN2", then the base station updates the count of "ACK-SN2" to 2. If at the second moment, the ACK-SN information received by the base station is "ACK-SN3", the base station deletes the record of "ACK-SN2" and updates it to "ACK-SN3", which is calculated as 1.
  • the base station judges whether the number of times of receiving the first ACK-SN information reaches a preset value, if yes, execute step 304, if not, execute step 305, wherein the preset value is greater than 1 and does not exceed the maximum retransmission frequency.
  • the base station retransmits the first data packet to the terminal.
  • the base station Since the number of times of receiving the first ACK-SN information reaches the preset value, the base station determines that the first data packet corresponding to the sequence number carried in the first ACK-SN information is lost, and the base station retransmits the first data packet to the terminal. data pack.
  • the system has a maximum number of retransmissions.
  • the base station In order to prevent the loss of data packets from causing users to be disconnected, the base station needs to retransmit the lost data to the terminal before the maximum number of retransmissions. Therefore, the preset value needs to be less than the maximum number of retransmissions. Passing times.
  • the status report carries ACK-SN information and NACK-SN information
  • the specific situation is as follows: if the terminal receives a data packet with a sequence number of 1, the status report that the terminal replies to the base station is " ACK-SN2"; at the next moment, if the terminal does not receive a data packet with sequence number 2, the status report that the terminal replies to the base station is "ACK-SN2, NACK-SN2 (used to indicate that the terminal has received the sequence The data packet before the number 2 is not received the data packet with the sequence number 2)"; at the next moment, the terminal receives the data packet with the sequence number 3, and the status report that the terminal replies to the base station is "ACK- SN4, NACK-SN2 (used to indicate that the terminal received the data before the sequence number 4, but did not receive the data with the sequence number 2)".
  • This can effectively indicate the sequence number of the lost data packet, thereby effectively realizing the retransmission of the lost data packet.
  • the base station receives the third ACK-SN information sent by the terminal, and the third ACK-SN information will be It will carry a new sequence number, which is used to indicate the status of the terminal receiving data packets. This can inform the base station of the data packet reception in time.
  • the base station receives the second ACK-SN information sent by the terminal.
  • the base station determines whether the second ACK-SN information is the same as the first ACK-SN information, if they are different, perform step 307, and if they are the same, perform step 302;
  • the base station determines whether the data packet sequence number carried in the second ACK-SN information is the same as the data packet sequence number carried in the first ACK-SN information, and if they are the same, the second ACK-SN information is the same as the first ACK-SN information.
  • the ACK-SN information is the same. If they are different, the second ACK-SN information is different from the first ACK-SN information. If they are not the same, the base station executes step 307, and if they are the same, the base station repeats step 302.
  • the base station updates the first ACK-SN information to the second ACK-SN information, and records the number of times the second ACK-SN information is received.
  • the base station After the base station determines that the second ACK-SN information is different from the first ACK-SN information, the base station determines that the data packet corresponding to the sequence number carried in the first ACK-SN information has been received by the terminal. The base station updates the first ACK-SN information to the second ACK-SN information, and recounts the number of times the second ACK-SN information is received.
  • the base station may retransmit the second data packet corresponding to the sequence number carried in the second ACK-SN information. It can be seen from the foregoing embodiment that the base station can cyclically perform step 301 to step 306 on the ACK-SN information.
  • the data retransmission device 400 includes: a receiving module 401, a processing module 402, and a retransmission module 403.
  • the apparatus 400 may be the base station in the foregoing method embodiment, or may be one or more chips in the base station.
  • the apparatus 400 may be used to perform part or all of the functions of the base station in the foregoing method embodiment.
  • the receiving module 401 may be used to perform step 201 in the above method embodiment, or to perform steps 301 and 305 in the above method embodiment; the processing module 402 may be used to perform the steps in the above method embodiment 202, or used to perform step 302, step 303, step 305, and step 306 in the foregoing method embodiment; the retransmission module 403 may be used to perform step 203 in the foregoing method embodiment or used to perform the foregoing method embodiment ⁇ 304 ⁇
  • the receiving module 401 is configured to receive the first ACK-SN information sent by the terminal, and the first ACK-SN information is included in the status report; the processing module 402 is configured to record the first ACK-SN information and the The number of times the first ACK-SN information is received; the retransmission module 403 is configured to retransmit to the terminal according to the first ACK-SN information when the cumulative number of times the first ACK-SN information is received reaches a preset value When transmitting the first data packet, the preset value does not exceed
  • the processing module 402 is configured to allocate a target transmission resource for the status report when the cumulative number of receptions of the ACK-SN information reaches the preset value, and the target transmission resource satisfies the status
  • the report carries ACK-SN information and NACK-SN information;
  • the receiving module 401 is further configured to receive the first ACK-SN information and NACK-SN information sent by the terminal;
  • the retransmission module 403 is configured to retransmit the first data packet to the terminal according to the first ACK-SN information and the NACK-SN information.
  • the device 400 further includes a storage module, which is coupled to the processing module, so that the processing module can execute the computer-executable instructions stored in the storage module to implement the functions of the base station in the foregoing method embodiment.
  • the storage module optionally included in the device 400 may be a storage unit in the chip, such as a register, a cache, etc., and the storage module may also be a storage unit located outside the chip, such as a read-only memory (read-only memory). Only memory (ROM for short) or other types of static storage devices that can store static information and instructions, random access memory (RAM for short), etc.
  • FIG. 5 shows a schematic diagram of a possible structure of a data retransmission apparatus 500 in the foregoing embodiment, and the apparatus 500 may be configured as the aforementioned base station.
  • the apparatus 500 may include a processor 502, a computer-readable storage medium/memory 503, a transceiver 504, an input device 505 and an output device 506, and a bus 501.
  • the processor, transceiver, computer-readable storage medium, etc. are connected by a bus.
  • the embodiments of the present application do not limit the specific connection medium between the foregoing components.
  • the transceiver 504 is configured to receive the first ACK-SN information sent by the terminal, the first ACK-SN information is included in the status report, and the first ACK-SN information carries the sequence number of the first data packet ;
  • the processor 502 is configured to record the first ACK-SN information and the number of times the first ACK-SN information is received;
  • the processor 502 may include a baseband circuit.
  • the data may be encapsulated and encoded according to the protocol to generate a data packet.
  • the transceiver 504 may include a radio frequency circuit to perform processing such as modulation and amplification on the data packet before sending it to the terminal.
  • the processor 502 may run an operating system to control functions between various devices and devices.
  • the transceiver 504 may include a baseband circuit and a radio frequency circuit.
  • the data packet may be processed by the baseband circuit and the radio frequency circuit and sent to the terminal.
  • the transceiver 504 and the processor 502 can implement the corresponding steps in any of the above-mentioned embodiments in FIG. 2 to FIG. 3, and details are not described here.
  • Figure 5 only shows the simplified design of the base station.
  • the base station can include any number of transceivers, processors, memories, etc., and all base stations that can implement this application are listed in this application. Within the scope of protection.
  • the processor 502 involved in the above device 500 may be a general-purpose processor, such as a general-purpose central processing unit (CPU), a network processor (NP), a microprocessor, etc., or may be an application-specific integrated circuit (application-specific integrated circuit). integrated circBIt, ASIC), or one or more integrated circuits used to control the execution of the program of this application. It may also be a digital signal processor (digital signal processor, DSP), a field-programmable gate array (field-programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • FPGA field-programmable gate array

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

本申请实施例公开了一种数据重传方法以及装置，用于及时对丢失的数据包进行重传，防止用户掉线。本申请实施例方法包括：该重传装置接收到终端发送的ACK-SN信息，并记录该ACK-SN信息和该ACK-SN信息的接收次数，在接收到相同的ACK-SN信息的次数达到预设值时，该重传装置根据该ACK-SN信息向该终端发送该ACK-SN指示的丢失数据包。

Description

一种数据重传方法以及装置
本申请要求于2019年05月28日提交中国专利局、申请号为201910452640.9、发明名称为“一种数据重传方法以及装置”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
本申请涉及通信领域，尤其涉及一种数据重传方法以及装置。
背景技术
随着互联网技术的快速发展，物联网也应运而生。目前物联网已由智能家居延伸到智能社区、智能交通、智能物流等等领域。物联网的基本架构包括三个层面：感知识别层，网络层，应用层。感知识别层实际上就是底层技术，是物联网一切的开始，主要由各类传感器获取数据，并将数据通过网络层发送给应用层；而应用层对该数据进行处理并将处理的结果进行展示。
而在数据传输过程中，超远点物联网用户下行数据在媒体接入控制(medium access cntrol，MAC)层发送失败后，需要通过无线链路控制(radio link control，RLC)层进行重传。但是在RLC层发送RLC状态报告时，受到上行调度资源的限制，导致RLC状态报告无法携带否定应答(Negative Acknowledgement，NACK_SN)信息，只能带确认应答(Acknowledgement，ACK_SN)信息。
而由于NACK_SN信息的丢失，从而导致RLC无法根据RLC状态报告及时进行重传，最终使得RLC达到最大重传次数，从而导致用户掉线。
发明内容
本申请实施例提供了一种数据重传方法以及装置，用于及时对丢失的数据包进行重传，防止用户掉线。
第一方面，本申请实施例提供一种重传方法，包括：基站接收终端发送的第一ACK-SN信息，其中，该第一ACK-SN信息包含于RLC状态报告中，所述第一ACK-SN信息携带第一数据包的序列号；然后该基站在记录该第一ACK-SN信息以及接收该第一ACK-SN信息的接收次数；若该第一ACK-SN信息的接收次数达到预设值，则该基站向该终端重传该第一数据包，其中，该预设值不超过该基站的最大重传次数且大于1。
本实施例中，该ACK-SN信息用于指示该终端接收数据包的情况，比如该终端接收到了序列号为1的数据包，则向该基站发送的ACK-SN信息为“ACK-SN2(用于指示该终端收到序列号2之前的数据包)”；若下一时刻该终端未收到序列号为2的数据包(即序列号为2的数据包丢失)，则向该基站发送的ACK-SN信息仍为“ACK-SN2”；在下一时刻该终端收到了序列号为3的数据包，则向该基站发送的ACK-SN信息仍为“ACK-SN2”。由上述情况可知，该ACK-SN信息可以用于指示丢失数据包的序列号，从而使得基站可以有效的重传丢失数据包。
本实施例中，该基站在状态报告的传输资源有限的情况下引入重复ACK-SN从而及时对丢失的数据包进行重传，防止用户掉线。
可选的，该基站在该第一ACK-SN信息的接收次数达到该预设值之后，也可以为该状态 报告分配目标传输资源，其中，该目标传输资源满足该状态报告携带该ACK-SN信息和NACK-SN信息；然后该基站接收该终端发送的该第一ACK-SN信息和NACK-SN信息；最后该基站根据该第一ACK-SN信息和该NACK-SN信息向该终端重传该第一数据包。
可以理解的是，若该状态报告中携带ACK-SN信息和NACK-SN信息的具体情况如下：如果该终端收到序列号为1的数据包，则该终端向该基站回复的状态报告为“ACK-SN2”；在下一时刻，该终端未收到序列号为2的数据包，则该终端向该基站回复的状态报告为“ACK-SN2，NACK-SN2(用于指示该终端收到了序列号为2之前的数据包，未收序列号为2的数据包)”；在下一时刻，该终端接收到序列号为3的数据包，则该终端向该基站回复的状态报告为“ACK-SN4，NACK-SN2(用于指示该终端收到了序列号为4之前的数据，但未收到序列号为2的数据)”。这样可以有效的指示丢失数据包的序列号，从而有效实现丢失数据包的重传。
可选的，在该基站接收该终端回复的ACK-SN信息的过程中，若该第一ACK-SN信息的接收次数未达到该预设值，且该基站接收到了第二ACK-SN信息，其中，所述第二ACK-SN信息携带第二数据包的序列号，则该基站将该第一ACK-SN信息更新为该第二ACK-SN信息，并记录该第二ACK-SN信息的接收次数；然后该基站在该第二ACK-SN信息的接收次数累计达到该预设值时，该基站根据该第二ACK-SN信息重传该第二数据包。
可以理解的是，该第二ACK-SN信息与该第一ACK-SN信息具有相同的功能(均用于指示终端接收到数据包的情况)，但是该第二ACK-SN信息中携带的序列号与该第一ACK-SN信息中携带的序列号不相同。在此实施例中，该第一ACK-SN信息携带的序列号对应的数据包没有丢失，因此该基站可以及时的将该第一ACK-SN信息删除，有效利用存储资源。
可选的，在该第一数据包重传成功之后(即该终端成功接收到丢失数据包)，该基站接收该终端发送的第三ACK-SN信息，此时该第三ACK-SN信息将会携带新的序列号，用于指示该终端接收数据包的情况。这样可以及时的通知基站数据包接收情况。
第二方面，本申请实施例提供一种数据重传装置，该装置具有实现上述第一方面中基站行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的实现方式中，该装置包括用于执行以上第一方面各个步骤的单元或模块。例如，该装置包括：接收模块，用于接收终端发送的第一ACK-SN信息，所述第一ACK-SN信息包含于状态报告；处理模块，用于记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数；重传模块，用于在所述第一ACK-SN信息的接收次数累计达到预设值时，根据所述第一ACK-SN信息向所述终端重传所述第一数据包，所述预设值不超过最大重传次数。
可选的，还包括存储模块，用于保存基站必要的程序指令和数据。
在一种可能的实现方式中，该装置包括：处理器和收发器，所述处理器被配置为支持基站执行上述第一方面提供的方法中相应的功能。收发器用于指示基站与终端之间的通信，向终端发送上述方法中所涉及的信息或指令。可选的，此装置还可以包括存储器，所述存储器用于与处理器耦合，其保存基站必要的程序指令和数据。
在一种可能的实现方式中，当该装置为基站内的芯片时，该芯片包括：处理模块和收发模块，所述处理模块例如可以是处理器，此处理器用于记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数，所述收发模块例如可以是该芯片上的输入/输出接口、管脚或电路等，将第一数据包(待重传数据包)传送给与此芯片耦合的其他芯片或模块中。该处理模块可执行存储单元存储的计算机执行指令，以支持基站执行上述第一方面提供的方法。可选地，所述存储单元可以为所述芯片内的存储单元，如寄存器、缓存等，所述存储单元还可以是位于所述芯片外部的存储单元，如只读存储器(read-only memory，简称ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，简称RAM)等。
在一种可能的实现方式中，该装置包括：处理器，基带电路，射频电路和天线。其中处理器用于实现对各个电路部分功能的控制，基带电路用于生成待重传数据包，经由射频电路进行模拟转换、滤波、放大和上变频等处理后，再经由天线发送给终端。可选的，该装置还包括存储器，其保存基站必要的程序指令和数据。
其中，上述任一处提到的处理器，可以是一个通用中央处理器(Central Processing Unit，简称CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，简称ASIC)，或一个或多个用于控制上述各方面信道资源协调分配的方法的程序执行的集成电路。
第三方面，本申请实施例提供一种计算机可读存储介质，所述计算机存储介质存储有计算机指令，所述计算机指令用于执行上述第一方面中任意可能的实施方式所述的方法。
第四方面，本申请实施例提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面中任意可能的实施方式所述的方法。
第五方面，本申请实施例提供一种通信系统，该系统包括上述方面所述的基站和终端。
从以上技术方案可以看出，本申请实施例具有以下优点：该基站在状态报告的传输资源有限的情况下引入重复ACK-SN从而及时对丢失的数据包进行重传，防止用户掉线。
附图说明
图1为本申请实施例中物联网的系统架构图；
图2为本申请实施例中数据重传方法的一个实施例示意图；
图3为本申请实施例中数据重传方法的另一个实施例示意图；
图4为本申请实施例中数据重传装置的一个实施例示意图；
图5为本申请实施例中数据重传装置的另一个实施例示意图；
图6为本申请实施例中通信系统的一个实施例示意图。
具体实施方式
本申请实施例提供了一种数据重传方法以及装置，用于及时对丢失的数据包进行重传，防止用户掉线。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这 里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
随着互联网技术的快速发展，物联网也应运而生。目前物联网已由智能家居延伸到智能社区、智能交通、智能物流等等领域。物联网的基本架构如图1所示，物联网包括三个层面：感知识别层，网络层，应用层。感知识别层实际上就是底层技术，是物联网一切的开始，主要由各类传感器获取数据，并将数据通过网络层发送给应用层；而应用层对该数据进行处理并将处理的结果进行展示。其中，该感知识别层可以包括各类而在数据传输过程中，超远点物联网用户下行数据在MAC层发送失败后，需要通过RLC层进行重传。但是在RLC层发送RLC状态报告时，受到上行调度资源的限制，导致RLC状态报告无法携带NACK_SN信息，只能带ACK_SN信息。而由于NACK_SN信息的丢失，从而导致RLC无法根据RLC状态报告及时进行重传，最终使得RLC达到最大重传次数，从而导致用户掉线。
为了解决这一问题，本申请实施例提供如下技术方案：基站接收终端发送的第一ACK-SN信息，其中，该第一ACK-SN信息包含于RLC状态报告中；然后该基站在记录该第一ACK-SN信息以及接收该第一ACK-SN信息的接收次数；若该第一ACK-SN信息的接收次数达到预设值，则该基站向该终端重传该第一数据包，其中，该预设值不超过该基站的最大重传次数且大于1。
具体情况请参阅图2所示，本申请实施例中重传方法的一个实施例，包括：
201、该基站接收终端发送的第一ACK-SN信息，该第一ACK-SN信息包含于状态报告，该第一ACK-SN信息携带第一数据包的序列号；
在数据传输过程中，该基站在向该终端发送下行数据包之后，该终端会向该基站反馈一个确认消息。在本申请实施例中以该基站接收到的第一ACK-SN信息进行说明。可以理解的是，该ACK-SN信息用于指示该终端接收数据包的情况，比如该终端接收到了序列号为1的数据包，则向该基站发送的ACK-SN信息为“ACK-SN2(用于指示该终端收到序列号2之前的数据包)”；若下一时刻该终端未收到序列号为2的数据包(即序列号为2的数据包丢失)，则向该基站发送的ACK-SN信息仍为“ACK-SN2”；在下一时刻该终端收到了序列号为3的数据包，则向该基站发送的ACK-SN信息仍为“ACK-SN2”。由上述情况可知，该ACK-SN信息可以用于指示丢失数据包的序列号，从而使得基站可以有效的重传丢失数据包。
202、该基站记录该第一ACK-SN信息以及该第一ACK-SN信息的接收次数；
该基站在接收到该第一ACK-SN信息之后记录该第一ACK-SN信息，并统计该第一ACK-SN信息的接收次数。
可以理解的是，该基站在接收终端发送的ACK-SN信息的过程中，会连续不断的接收ACK-SN信息，这时该基站可以对接收到的每一个ACK-SN信息进行判断，如果与前一时刻接收到ACK-SN信息相同，则对于接收次数累计加1，依次循环。比如，该基站在第一时刻接收到的第一ACK-SN信息为“ACK-SN2”，则该基站将该“ACK-SN2”记录，并计数为1；在第二时刻时，该基站接收到的ACK-SN信息为“ACK-SN2”，则该基站将“ACK-SN2”的计 数更新为2。若在第二时刻，该基站接收到的ACK-SN信息为“ACK-SN3”，则该基站将“ACK-SN2”的记录删除，更新为“ACK-SN3”，其计算为1。
203、在该第一ACK-SN信息的接收次数达到预设值时，该基站向该终端重传该第一数据包，其中，该预设值大于1且不超过最大重传次数。
若该第一ACK-SN信息的接收次数达到了预设值，则该基站向该终端重传该第一数据包，其中，该预设值设置为大于1且不超过该数据传输系统的最大重传次数。比如该预设值可以设置为3。
在数据传输系统中，系统存在最大重传次数，为了防止数据包丢失导致用户掉线，基站需要在最大重传次数之前向该终端重传丢失的数据，因此该预设值需要小于该最大重传次数。
可选的，该基站在该第一ACK-SN信息的接收次数达到该预设值之后，也可以为该状态报告分配目标传输资源，其中，该目标传输资源满足该状态报告携带该ACK-SN信息和NACK-SN信息；然后该基站接收该终端发送的该第一ACK-SN信息和NACK-SN信息；最后该基站根据该第一ACK-SN信息和该NACK-SN信息向该终端重传该第一数据包。
可以理解的是，若该状态报告中携带ACK-SN信息和NACK-SN信息的具体情况如下：如果该终端收到序列号为1的数据包，则该终端向该基站回复的状态报告为“ACK-SN2”；在下一时刻，该终端未收到序列号为2的数据包，则该终端向该基站回复的状态报告为“ACK-SN2，NACK-SN2(用于指示该终端收到了序列号为2之前的数据包，未收序列号为2的数据包)”；在下一时刻，该终端接收到序列号为3的数据包，则该终端向该基站回复的状态报告为“ACK-SN4，NACK-SN2(用于指示该终端收到了序列号为4之前的数据，但未收到序列号为2的数据)”。这样可以有效的指示丢失数据包的序列号，从而有效实现丢失数据包的重传。
可选的，在该第一数据包重传成功之后(即该终端成功接收到丢失数据包)，该基站接收该终端发送的第三ACK-SN信息，此时该第三ACK-SN信息将会携带新的序列号，用于指示该终端接收数据包的情况。这样可以及时的通知基站数据包接收情况。
本实施例中，该基站在状态报告的传输资源有限的情况下引入重复ACK-SN从而及时对丢失的数据包进行重传，防止用户掉线。
上述实施例是以单一ACK-SN信息的角度进行描述，下面以多个ACK-SN信息的角度对本申请实施例进行描述，具体情况请参阅图3所示，本申请实施例中重传方法的另一个实施例，包括：
301、该基站接收终端发送的第一ACK-SN信息，该第一ACK-SN信息包含于状态报告，该第一ACK-SN信息携带第一数据包的序列号；
在数据传输过程中，该基站在向该终端发送下行数据包之后，该终端会向该基站反馈一个确认消息。在本申请实施例中以该基站接收到的第一ACK-SN信息进行说明。可以理解的是，该ACK-SN信息用于指示该终端接收数据包的情况，比如该终端接收到了序列号为1的数据包，则向该基站发送的ACK-SN信息为“ACK-SN2(用于指示该终端收到序列号2之前的数据包)”；若下一时刻该终端未收到序列号为2的数据包(即序列号为2的数据包丢 失)，则向该基站发送的ACK-SN信息仍为“ACK-SN2”；在下一时刻该终端收到了序列号为3的数据包，则向该基站发送的ACK-SN信息仍为“ACK-SN2”。由上述情况可知，该ACK-SN信息可以用于指示丢失数据包的序列号，从而使得基站可以有效的重传丢失数据包。
302、该基站记录该第一ACK-SN信息以及该第一ACK-SN信息的接收次数；
该基站在接收到该第一ACK-SN信息之后记录该第一ACK-SN信息，并统计该第一ACK-SN信息的接收次数。
可以理解的是，该基站在接收终端发送的ACK-SN信息的过程中，会连续不断的接收ACK-SN信息，这时该基站可以对接收到的每一个ACK-SN信息进行判断，如果与前一时刻接收到ACK-SN信息相同，则对于接收次数累计加1，依次循环。比如，该基站在第一时刻接收到的第一ACK-SN信息为“ACK-SN2”，则该基站将该“ACK-SN2”记录，并计数为1；在第二时刻时，该基站接收到的ACK-SN信息为“ACK-SN2”，则该基站将“ACK-SN2”的计数更新为2。若在第二时刻，该基站接收到的ACK-SN信息为“ACK-SN3”，则该基站将“ACK-SN2”的记录删除，更新为“ACK-SN3”，其计算为1。
303、该基站判断该第一ACK-SN信息的接收次数是否达到预设值，若是，则执行步骤304，若否，则执行步骤305，其中，该预设值大于1且不超过最大重传次数。
304、该基站向该终端重传该第一数据包。
由于该第一ACK-SN信息的接收次数达到该预设值，该基站确定该第一ACK-SN信息携带的序列号对应的该第一数据包丢失，该基站向该终端重传该第一数据包。
在数据传输系统中，系统存在最大重传次数，为了防止数据包丢失导致用户掉线，基站需要在最大重传次数之前向该终端重传丢失的数据，因此该预设值需要小于该最大重传次数。
可选的，该基站在该第一ACK-SN信息的接收次数达到该预设值之后，也可以为该状态报告分配目标传输资源，其中，该目标传输资源满足该状态报告携带该ACK-SN信息和NACK-SN信息；然后该基站接收该终端发送的该第一ACK-SN信息和NACK-SN信息；最后该基站根据该第一ACK-SN信息和该NACK-SN信息向该终端重传该第一数据包。
可以理解的是，若该状态报告中携带ACK-SN信息和NACK-SN信息的具体情况如下：如果该终端收到序列号为1的数据包，则该终端向该基站回复的状态报告为“ACK-SN2”；在下一时刻，该终端未收到序列号为2的数据包，则该终端向该基站回复的状态报告为“ACK-SN2，NACK-SN2(用于指示该终端收到了序列号为2之前的数据包，未收序列号为2的数据包)”；在下一时刻，该终端接收到序列号为3的数据包，则该终端向该基站回复的状态报告为“ACK-SN4，NACK-SN2(用于指示该终端收到了序列号为4之前的数据，但未收到序列号为2的数据)”。这样可以有效的指示丢失数据包的序列号，从而有效实现丢失数据包的重传。
可选的，在该第一数据包重传成功之后(即该终端成功接收到丢失数据包)，该基站接收该终端发送的第三ACK-SN信息，此时该第三ACK-SN信息将会携带新的序列号，用于指示该终端接收数据包的情况。这样可以及时的通知基站数据包接收情况。
305、该基站接收终端发送的第二ACK-SN信息。
该基站接收到终端在下一时刻发送的第二ACK-SN信息，其中该第二ACK-SN信息同样携带数据包的序列号，且包含于状态报告中。
306、该基站确定该第二ACK-SN信息与该第一ACK-SN信息是否相同，若不同，则执行步骤307，若相同，则执行步骤302；
该基站判断该第二ACK-SN信息中携带的数据包序列号与该第一ACK-SN信息中携带的数据包序列号是否相同，若相同，则该第二ACK-SN信息与该第一ACK-SN信息相同，若不同，则该第二ACK-SN信息与该第一ACK-SN信息不相同。在不相同的情况下，该基站执行步骤307，若相同的情况下，该基站重复执行步骤302。
307、该基站将该第一ACK-SN信息更新为该第二ACK-SN信息，并记录该第二ACK-SN信息的接收次数。
该基站在确定该第二ACK-SN信息与该第一ACK-SN信息不相同之后，该基站确定该第一ACK-SN信息携带的序列号对应的数据包已经被该终端接收，这时该基站将该第一ACK-SN信息更新为该第二ACK-SN信息，并重新计数该第二ACK-SN信息的接收次数。
可以理解的是，该基站在该第二ACK-SN信息的接收次数达到预设值时，该基站可以重传该第二ACK-SN信息携带的序列号对应的第二数据包。由上述实施例可知，该基站可以对ACK-SN信息循环执行步骤301至步骤306。
本实施例中，该基站在状态报告的传输资源有限的情况下引入重复ACK-SN从而及时对丢失的数据包进行重传，防止用户掉线。
上面描述了本申请实施例中的数据重传方法，下面对本申请实施例中的重传装置进行描述。
本申请实施例中该数据重传装置400包括：接收模块401、处理模块402和重传模块403。装置400可以是上述方法实施例中的基站，也可以是基站内的一个或多个芯片。装置400可以用于执行上述方法实施例中的基站的部分或全部功能。
例如，该接收模块401可以用于执行上述方法实施例中的步骤201、或者用于执行上述方法实施例中的步骤301和步骤305；该处理模块402可以用于执行上述方法实施例中的步骤202，或者用于执行前述方法实施例中的步骤302和步骤303和步骤305和步骤306；该重传模块403可以用于执行上述方法实施例中的步骤203或者用于执行上述方法实施例中的步骤304。例如，接收模块401，用于接收终端发送的第一ACK-SN信息，所述第一ACK-SN信息包含于状态报告；处理模块402，用于记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数；重传模块403，用于在所述第一ACK-SN信息的接收次数累计达到预设值时，根据所述第一ACK-SN信息向所述终端重传所述第一数据包，所述预设值不超过最大重传次数。
可选的，所述处理模块402，用于在所述ACK-SN信息的接收次数累计达到所述预设值时，为所述状态报告分配目标传输资源，所述目标传输资源满足所述状态报告携带ACK-SN信息和NACK-SN信息；
所述接收模块401，还用于接收所述终端发送的所述第一ACK-SN信息和NACK-SN信息；
所述重传模块403，用于根据所述第一ACK-SN信息和所述NACK-SN信息向所述终端重 传所述第一数据包。
可选的，装置400还包括存储模块，此存储模块于处理模块耦合，使得处理模块可执行存储模块中存储的计算机执行指令以实现上述方法实施例中基站的功能。在一个示例中，装置400中可选的包括的存储模块可以为芯片内的存储单元，如寄存器、缓存等，所述存储模块还可以是位于芯片外部的存储单元，如只读存储器(read-only memory，简称ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，简称RAM)等。
应理解，上述图4对应实施例中数据重传装置的各模块之间所执行的流程与前述图2至图3中对应方法实施例中的基站执行的流程类似，具体此处不再赘述。
图5示出了上述实施例中一种数据重传装置500可能的结构示意图，该装置500可以配置成是前述基站。该装置500可以包括：处理器502、计算机可读存储介质/存储器503、收发器504、输入设备505和输出设备506，以及总线501。其中，处理器，收发器，计算机可读存储介质等通过总线连接。本申请实施例不限定上述部件之间的具体连接介质。
一个示例中，收发器504，用于接收终端发送的第一ACK-SN信息，所述第一ACK-SN信息包含于状态报告，所述第一ACK-SN信息携带第一数据包的序列号；
该处理器502，用于记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数；
收发器504，用于在所述第一ACK-SN信息的接收次数累计达到预设值时，根据所述第一ACK-SN信息向所述终端重传所述第一数据包，所述预设值不超过最大重传次数。
一个示例中，处理器502可以包括基带电路，例如，可以对数据按照协议进行数据封装，编码等以生成数据包。收发器504可以包括射频电路，以对数据包进行调制放大等处理后发送给终端。
又一个示例中，处理器502可以运行操作系统，控制各个设备和器件之间的功能。收发器504可以包括基带电路和射频电路，例如，可以对数据包经由基带电路，射频电路进行处理后发送给终端。
该收发器504与该处理器502可以实现上述图2至图3中任一实施例中相应的步骤，具体此处不做赘述。
可以理解的是，图5仅仅示出了基站的简化设计，在实际应用中，基站可以包含任意数量的收发器，处理器，存储器等，而所有的可以实现本申请的基站都在本申请的保护范围之内。
上述装置500中涉及的处理器502可以是通用处理器，例如通用中央处理器(CPU)、网络处理器(network processor，NP)、微处理器等，也可以是特定应用集成电路(application-specific integrated circBIt，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。还可以是数字信号处理器(digital signal processor，DSP)、现场可编程门阵列(field-programmable gate array，FPGA)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。控制器/处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。处理器通常是基于存储器内存储的程序指令来执行逻辑和算术运算。
上述涉及的总线501可以是外设部件互连标准(peripheral component interconnect，简称PCI)总线或扩展工业标准结构(extended industry standard architecture，简称EISA)总线等。该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5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。
上述涉及的计算机可读存储介质/存储器503还可以保存有操作系统和其他应用程序。具体地，程序可以包括程序代码，程序代码包括计算机操作指令。更具体的，上述存储器可以是只读存储器(read-only memory，ROM)、可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)、可存储信息和指令的其他类型的动态存储设备、磁盘存储器等等。存储器503可以是上述存储类型的组合。并且上述计算机可读存储介质/存储器可以在处理器中，还可以在处理器的外部，或在包括处理器或处理电路的多个实体上分布。上述计算机可读存储介质/存储器可以具体体现在计算机程序产品中。举例而言，计算机程序产品可以包括封装材料中的计算机可读介质。
可以替换的，本申请实施例还提供一种通用处理系统，例如通称为芯片，该通用处理系统包括:提供处理器功能的一个或多个微处理器；以及提供存储介质的至少一部分的外部存储器，所有这些都通过外部总线体系结构与其它支持电路连接在一起。当存储器存储的指令被处理器执行时，使得处理器执行基站在图2至图3所述实施例中的数据重传方法中的部分或全部步骤，和/或用于本申请所描述的技术的其它过程。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于用户设备中。当然，处理器和存储介质也可以作为分立组件存在于用户设备中。
具体请参阅图6，本申请实施例中通信系统的一个实施例包括：
数据重传装置601和终端602；
其中，该数据重传装置601与该终端602通过网络系统实现数据传输；
该数据重传装置601具备图2至图3中基站的全部功能，该终端602具备图2至图3中终端的全部功能。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间 接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (12)

  1. 一种数据重传方法，其特征在于，包括：
    基站接收终端发送的第一ACK-SN信息，所述第一ACK-SN信息包含于状态报告，所述第一ACK-SN信息携带第一数据包的序列号；
    所述基站记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数；
    在所述第一ACK-SN信息的接收次数累计达到预设值时，所述基站根据所述第一ACK-SN信息向所述终端重传所述第一数据包，所述预设值不超过最大重传次数。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述ACK-SN信息的接收次数累计达到所述预设值时，所述基站为所述状态报告分配目标传输资源，所述目标传输资源满足所述状态报告携带ACK-SN信息和NACK-SN信息；
    所述基站接收所述终端发送的所述第一ACK-SN信息和NACK-SN信息；
    所述基站根据所述第一ACK-SN信息和所述NACK-SN信息向所述终端重传所述第一数据包。
  3. 根据权利要求1或2所述的方法，其特征在于，若在所述第一ACK-SN信息的接收次数累计未达到所述预设值时，所述基站接收所述终端发送的第二ACK-SN信息，所述第二ACK-SN信息携带第二数据包的序列号，则所述方法还包括：
    所述基站将所述第一ACK-SN信息更新为所述第二ACK-SN信息，并记录所述第二ACK-SN信息的接收次数；
    在所述第二ACK-SN信息的接收次数累计达到所述预设值时，所述基站根据所述第二ACK-SN信息向所述终端重传所述第二数据包。
  4. 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：
    在所述第一数据包重传成功之后，所述基站接收所述终端发送的第三ACK-SN信息。
  5. 一种数据重传装置，其特征在于，包括：
    接收模块，用于接收终端发送的第一ACK-SN信息，所述第一ACK-SN信息包含于状态报告，所述第一ACK-SN信息携带第一数据包的序列号；
    处理模块，用于记录所述第一ACK-SN信息以及所述第一ACK-SN信息的接收次数；
    重传模块，用于在所述第一ACK-SN信息的接收次数累计达到预设值时，根据所述第一ACK-SN信息向所述终端重传所述第一数据包，所述预设值不超过最大重传次数。
  6. 根据权利要求5所述的装置，其特征在于，所述处理模块，用于在所述ACK-SN信息的接收次数累计达到所述预设值时，为所述状态报告分配目标传输资源，所述目标传输资源满足所述状态报告携带ACK-SN信息和NACK-SN信息；
    所述接收模块，还用于接收所述终端发送的所述第一ACK-SN信息和NACK-SN信息；
    所述重传模块，用于根据所述第一ACK-SN信息和所述NACK-SN信息向所述终端重传所述第一数据包。
  7. 根据权利要求5或6所述的装置，其特征在于，若在所述第一ACK-SN信息的接收次数累计未达到所述预设值时，所述接收模块接收所述终端发送的第二ACK-SN信息，所述第二ACK-SN信息携带第二数据包的序列号，则所述处理模块，还用于将所述第一ACK-SN 信息更新为所述第二ACK-SN信息，并记录所述第二ACK-SN信息的接收次数；
    所述重传模块，还用于在所述第二ACK-SN信息的接收次数累计达到所述预设值时，根据所述第二ACK-SN信息向所述终端重传所述第二数据包。
  8. 根据权利要求5或6所述的装置，其特征在于，所述接收模块，还用于在所述第一数据包重传成功之后，所述基站接收所述终端发送的第三ACK-SN信息。
  9. 一种数据重传装置，其特征在于，包括至少一个处理器和至少一个存储器，其中，所述存储器中存有计算机可读程序，所述处理器通过运行所述存储器中的程序，以用于完成权利要求1至4中任一项所述的方法。
  10. 一种计算机可读存储介质，其特征在于，所述计算机存储介质存储有计算机指令，所述计算机指令用于执行权利要求1至4中任一项所述的方法。
  11. 一种包含指令的计算机程序产品，其特征在于，当所述计算机程序产品在计算机上运行时，使得计算机执行权利要求1至4中任一项所述的方法。
  12. 一种通信系统，其特征在于，包括：终端，以及如权利要求5至8中任一项所述的数据重传装置。
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