WO2020078271A1 - 传输方法、装置、系统及计算机可读存储介质 - Google Patents

传输方法、装置、系统及计算机可读存储介质 Download PDF

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Publication number
WO2020078271A1
WO2020078271A1 PCT/CN2019/110574 CN2019110574W WO2020078271A1 WO 2020078271 A1 WO2020078271 A1 WO 2020078271A1 CN 2019110574 W CN2019110574 W CN 2019110574W WO 2020078271 A1 WO2020078271 A1 WO 2020078271A1
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Prior art keywords
data packet
automatic retransmission
request process
retransmission request
lifetime
Prior art date
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PCT/CN2019/110574
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English (en)
French (fr)
Inventor
杨丹
位宁
孙波
李楠
韩志强
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP19873171.3A priority Critical patent/EP3869718A4/en
Priority to US17/286,394 priority patent/US11671211B2/en
Publication of WO2020078271A1 publication Critical patent/WO2020078271A1/zh
Priority to US18/306,563 priority patent/US11979242B2/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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1806—Go-back-N protocols
    • 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
    • H04L1/188—Time-out mechanisms
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • 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
    • 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
    • H04L1/1835—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
    • 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
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

Definitions

  • Embodiments of the present invention relate to a transmission method, device, system, and computer-readable storage medium.
  • LBT listen before talk
  • a wireless local area network working in an unlicensed frequency band as an example.
  • common devices are an access point (AP, Access Point) station (STA, Station) and a non-AP site (non-AP STA).
  • the AP establishes a basic service set (BSS, Basic Service Set), and the non-AP STA associates with the AP through the scan authentication association process, and communicates with the AP or communicates with other STAs through the AP.
  • BSS Basic Service Set
  • IBSS Independent BSS
  • IBSS independent BSS
  • the packet confirmation mechanism currently used in the wireless local area network generally includes: the sender sends a data packet, and the data packet carries a response strategy, and the response strategy is used to indicate whether the receiver needs to reply with a correct confirmation frame.
  • the receiver receives the data packet when it is indicated that the receiver needs to reply the correct confirmation frame, and does not reply any response when it is judged that the reception is incorrect, and discards the data packet; Since the discarded data packet still contains valid information, in order to use the valid information, the wireless LAN introduces an automatic retransmission request mechanism, that is, when the receiver judges that the received data packet is incorrect, it will cache the data packet and use it for merge processing.
  • the sender will retransmit the data packet or different redundant versions of the data packet.
  • the sender needs to monitor the channel first each time it retransmits the data packet or a different redundant version of the data packet, which is subject to the access time point Uncertainty and other factors will cause the automatic retransmission request process where the packet is located to take too long to occupy the corresponding management and storage resources, and due to the limitations of the device capacity, the maximum automatic retransmission request supported by the device at the same time The number of processes is limited. If the resources cannot be released in time, new automatic retransmission request processes cannot be created, thereby reducing transmission efficiency.
  • Embodiments of the present invention provide a transmission method, device, system, and computer-readable storage.
  • an embodiment of the present invention provides a transmission method, including:
  • an embodiment of the present invention provides a transmission method, including:
  • the lifetime of the first automatic retransmission cache block corresponding to the data packet is maintained.
  • an embodiment of the present invention provides a transmission device, including:
  • a creation module is used to create an automatic retransmission request process of the first data packet; set the life period of the automatic retransmission request process; and send the first data packet.
  • an embodiment of the present invention provides a transmission device, including:
  • the first receiving module is used to receive the data packet
  • the first maintenance module is configured to maintain the lifetime of the automatic retransmission request process corresponding to the first predetermined number when it is determined that the data packet is received incorrectly and the first predetermined number carried in the data packet is obtained.
  • an embodiment of the present invention provides a transmission device, including:
  • the second receiving module is used to receive the data packet
  • the second maintenance module is used to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet when it is determined that the data packet is received incorrectly.
  • an embodiment of the present invention provides a transmission device, including a processor and a computer-readable storage medium, where the computer-readable storage medium stores instructions, which are implemented when the instructions are executed by the processor Any one of the above transmission methods.
  • an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the foregoing transmission methods are implemented.
  • an embodiment of the present invention provides a transmission system, including:
  • the first sender is used to create an automatic retransmission request process of the first data packet; set the life period of the automatic retransmission request process; send the first data packet;
  • the first receiver is used to receive the data packet; when it is determined that the data packet is received incorrectly, and the first predetermined number carried in the data packet is obtained, the life of the automatic retransmission request process corresponding to the first predetermined number is maintained period.
  • an embodiment of the present invention provides a transmission system, including:
  • the second sender is used to create an automatic retransmission request process of the first data packet; set the life period of the automatic retransmission request process; send the first data packet;
  • the second receiver is used to receive the data packet; when it is determined that the data packet is received incorrectly, the lifetime of the first automatic retransmission cache block corresponding to the data packet is maintained.
  • FIG. 1 is a flowchart of a transmission method proposed by an embodiment of the present invention.
  • FIG. 2 is a flowchart of a transmission method proposed by another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an automatic retransmission buffer area according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a transmission method proposed by another embodiment of the present invention.
  • FIG. 5 is a schematic diagram 1 of frame interaction according to an embodiment of the present invention.
  • FIG. 6 is a second schematic diagram of frame interaction according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a transmission device according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a transmission device according to another embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a transmission device according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a transmission system according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a transmission system according to another embodiment of the present invention.
  • an embodiment of the present invention provides a transmission method, including the following step 100.
  • Step 100 Create an automatic retransmission request process of the first data packet; set a life period of the automatic retransmission request process; send the first data packet.
  • an automatic retransmission request process of the first data packet may be created before sending the first data packet, or an automatic retransmission request process of the first data packet may be created when the first data packet is sent, or After the first data packet, an automatic retransmission request process of the first data packet is created. That is to say, the absolute value of the difference between the time when the first data packet is sent and the time when the automatic retransmission request process for creating the first data packet is within a predetermined time threshold.
  • the first data packet may be a newly transmitted data packet or a retransmitted data packet, which is not limited in this embodiment of the present invention.
  • step 101 it further includes the following step 101.
  • Step 101 Start maintaining the lifetime of the automatic retransmission request process.
  • a timer or a counter may be used to maintain the lifetime of the automatic retransmission request process.
  • the lifetime includes at least one of the following: length of time, end time of the lifetime, and number of times.
  • the length of time includes any one of the following: the effective time length and the remaining time length.
  • the number of times includes any one of the following: new transmission data packets, and the total number of retransmissions of data packets carrying the same first predetermined number as the new transmission data packets, new transmission data packets, and retransmission carrying The total number of remaining times of the data packet of the first predetermined number that is the same as the newly transmitted data packet, the total number of times of retransmitting the data packet, and the remaining number of times of retransmitting the data packet.
  • the effective time length refers to: the time interval from when the automatic retransmission request process is created, or from the start of configuration to the automatic retransmission request process is removed.
  • the remaining length of time refers to the time interval between the current time and the automatic retransmission request process being removed.
  • the end time of the lifetime refers to the time when the automatic retransmission request process is removed.
  • the lifetime of the automatic retransmission request process may be maintained by a timer, which may be specifically counted or counted down.
  • the lifetime of the automatic retransmission request process can be maintained by a counter, which can be counted or counted down.
  • the embodiment of the present invention does not limit the time to start maintaining the lifetime of the automatic retransmission request process.
  • the lifetime of the automatic retransmission request process may be started when the lifetime of the automatic retransmission request process is set.
  • the lifetime is obtained in any of the following ways.
  • the first way obtain according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number of the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the third way according to the life of the notification.
  • the fourth way according to the negotiated lifetime.
  • the fifth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the method further includes the following step 102.
  • Step 102 When the preset retransmission condition is met during the life of the automatic retransmission request process, retransmit the second data packet; the first data packet and the second data packet carry the same first predetermined number.
  • the life of the automatic retransmission request process is maintained during the process of determining whether the preset retransmission conditions are met during the life of the automatic retransmission request process and the process of retransmitting the second data packet.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the preset retransmission condition includes at least one of the following preset retransmission conditions.
  • the time to compete for the channel through the contention access mechanism is within the lifetime of the automatic retransmission request process.
  • the confirmation frame includes receiving a correct confirmation frame or receiving an incorrect confirmation frame.
  • any one of the following methods may be used to retransmit the second data packet.
  • the first method Retransmit the second data packet after receiving the first predetermined time interval (for example, Short Frame InterFrame Space (SIFS)) after receiving the incorrect confirmation frame received by the receiver.
  • the first predetermined time interval for example, Short Frame InterFrame Space (SIFS)
  • the second method after receiving the incorrect reception confirmation frame returned by the receiver, retransmit the second data packet during the lifetime during the contention according to the contention access mechanism.
  • the third method when all the moments within the first predetermined time interval after receiving the incorrect acknowledgement frame received by the receiver are within the lifetime of the automatic retransmission request process, upon receiving the response received by the receiver
  • the second data packet is retransmitted after the first predetermined time interval after the incorrect confirmation frame; when a part or all of the time within the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver is received in the automatic
  • the life of the retransmission request process is outside, extend the life of the automatic retransmission request process to a third predetermined time interval after the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver; wherein
  • the third predetermined time interval is at least the time required to retransmit the second data packet; the second data packet is retransmitted after the first predetermined time interval after receiving the incorrect acknowledge frame received by the receiver.
  • Fourth method When all the moments within the first predetermined time interval after receiving the incorrect acknowledgement frame received by the receiver are within the lifetime of the automatic retransmission request process, when the received response from the receiver is not received The second data packet is retransmitted after the first predetermined time interval after the frame is correctly confirmed; when receiving an incorrect acknowledge frame received by the receiver, part or all of the time within the first predetermined time interval after the frame is automatically retransmitted.
  • the lifetime of the transmission request process is outside, when the lifetime of the automatic retransmission request process expires, the automatic retransmission request process is removed, that is, the first time after receiving the incorrect confirmation frame received by the receiver. After the predetermined time interval, the second data packet is not retransmitted.
  • the first data packet or the second data packet also carries at least one of a lifetime, an end time of the lifetime, a remaining length of time, and a remaining number of times.
  • the second data packet is the same as the first data packet, or the redundancy version of the second data packet and the first data packet is different.
  • the method further includes the following step 103.
  • Step 103 When the life time of the automatic retransmission request process expires, or when a correct confirmation frame received by the receiver is received, the automatic retransmission request process is removed or ended.
  • the life span expiration refers to the length of time indicated by the timer reaching the life span.
  • the life span expiration means that the timer reaches the end time.
  • the life span expiration refers to the number of times the counter reaches the life span.
  • the life span expiration refers to any one of the following conditions: the timer reaches the length of time indicated by the life span; the counter count reaches the life span. The indicated number of times.
  • the life cycle expiration means that any of the following conditions are met: the timer reaches the end time of the life cycle; the counter count reaches the life cycle indication frequency.
  • the life cycle expires means the timer counts to 0.
  • the expiry of the lifetime means that the counter counts to zero.
  • the expiration of the lifetime means that any of the following conditions are met: the timer counts to 0; the counter counts to 0.
  • removing or ending the automatic retransmission request process includes at least one of the following states.
  • the first state stop sending the first data packet or retransmit the second data packet.
  • Second state stop sending data packets carrying the first predetermined number.
  • the third state stop using the automatic retransmission request mechanism to send the first data packet or retransmit the second data packet.
  • the embodiment of the present invention removes or ends the automatic retransmission request process corresponding to the first data packet or the second data packet when the life span of the automatic retransmission request process expires, or when a correct confirmation frame received by the receiver is received. In this way, the automatic retransmission request process is removed in time. Under the premise that the number of automatic retransmission request processes supported at the same time is limited, a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • another embodiment of the present invention provides a transmission method, including the following steps 200-201.
  • Step 200 Receive a data packet.
  • Step 201 When it is judged that the data packet is received incorrectly, and the first predetermined number carried in the data packet is obtained, the lifetime of the automatic retransmission request process corresponding to the first predetermined number is maintained.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the lifetime of the automatic retransmission request process corresponding to the maintenance of the first predetermined number includes at least one of the following.
  • the first type when the received data packet meets the first predetermined condition, start to maintain the life cycle of the automatic retransmission request process corresponding to the first predetermined number; specifically, when a timer is used to maintain the automatic retransmission request process During the lifetime, the timer can be started or counted down; when the counter is used to maintain the lifetime of the automatic retransmission request process, the counter can be started or counted down.
  • the first predetermined condition includes: the received data packet is a newly transmitted data packet; or the first predetermined number of the received data packet corresponds to the currently maintained automatic retransmission request process. One reservation number is different.
  • the second predetermined condition includes: the received data packet is a retransmission data packet; or there is a corresponding first predetermined number and the data packet in the automatic retransmission request process currently maintained The automatic retransmission request process with the same first predetermined number.
  • determining whether the received data packet is a newly transmitted data packet or a retransmitted data packet includes any of the following.
  • the first type judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet; in one embodiment, when the new transmission instruction information indicates When it is a newly transmitted data packet, it is determined that the received data packet is a newly transmitted data packet; when the new transmission instruction information indicates a retransmitted data packet, it is determined that the received data packet is a retransmitted data packet.
  • the second type determine whether the process number carried in the data packet is the same as the process number corresponding to the created or configured automatic retransmission request process; in some embodiments, when the process number carried in the data packet is the same as the created or configured When the process numbers corresponding to the automatic retransmission request process are not the same, it is determined that the received data packet is a new transmission data packet; when the created or configured automatic retransmission request process has a process number that is the same as the process number carried in the data packet During the automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • the third type determine whether the packet sequence number carried in the data packet is the same as the packet sequence number corresponding to the created or configured automatic retransmission request process; in some embodiments, when the packet sequence number carried in the data packet is the same as the created or configured When the packet sequence numbers corresponding to the automatic retransmission request process are not the same, the received data packet is determined to be a new transmission data packet; when the created or configured automatic retransmission request process exists, the packet sequence number is the same as the packet sequence number carried in the data packet During the automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • a timer or counter may be used to maintain the lifetime of the automatic retransmission request process.
  • the life span includes at least one of the following: the length of time, the end time of the life span, and the number of times.
  • the length of time includes any one of the following: effective time length and remaining time length.
  • the number of times includes any one of the following: the total number of newly transmitted data packets and retransmitted data packets carrying the same first predetermined number as the new transmitted data packets, newly transmitted data packets and retransmitted carry There are the total remaining number of data packets of the first predetermined number same as the newly transmitted data packet, the total number of retransmitting data packets, and the remaining number of retransmitting data packets.
  • the effective time length refers to the time interval from when the automatic retransmission request process is created or configured to when the automatic retransmission request process is removed.
  • the remaining time length refers to the time interval from the current moment to the time when the automatic retransmission request process is removed.
  • the end time of the lifetime refers to the time when the automatic retransmission request process is removed.
  • the timer when the lifetime is long or the remaining time is long, can be used to maintain the lifetime of the automatic retransmission request process. Specifically, it can be timed or counted down, that is, received After the packet is created or the automatic retransmission request process is configured, a timer is started to start or count down.
  • the lifetime of the automatic retransmission request process can be maintained by a counter, which can be counted or counted down, that is, after the automatic retransmission request process is created or configured for the received data packet, the counter is started to start counting or counting down.
  • the lifetime is obtained in any of the following ways.
  • the first way Obtained according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the third way obtained according to the lifetime carried in the data packet.
  • the fourth way according to the life of the notification.
  • the fifth way according to the negotiated life cycle.
  • the sixth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the data packet when it is determined that the data packet is received incorrectly, and the received data packet is a newly transmitted data packet, and the first predetermined number carried in the data packet cannot be obtained; or, the data is determined When the packet is received incorrectly, and the received data packet is a retransmission data packet, and the first predetermined number carried by the data packet cannot be obtained, the data packet is discarded.
  • the method further includes the following step 202.
  • Step 202 When the lifetime of the automatic retransmission request process expires, remove or end the automatic retransmission request process.
  • the life span expiration refers to the length of time indicated by the timer reaching the life span.
  • the life span expiration means that the timer reaches the end time.
  • the life span expiration refers to the number of times the counter reaches the life span.
  • the life span expiration refers to any one of the following conditions: the timer reaches the length of time indicated by the life span; the counter count reaches the life span. The indicated number of times.
  • the life cycle expiration means that any of the following conditions are met: the timer reaches the end time of the life cycle; the counter count reaches the life cycle indication frequency.
  • the life cycle expires means the timer counts to 0.
  • the expiry of the lifetime means that the counter counts to zero.
  • the expiration of the lifetime means that any of the following conditions are met: the timer counts to 0; the counter counts to 0.
  • the automatic retransmission request process corresponding to the first data packet or the second data packet is removed or ended, so that the automatic retransmission request process is removed in time,
  • a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • another embodiment of the present invention provides a transmission method, including the following steps 400-401.
  • Step 400 Receive a data packet.
  • Step 401 When it is determined that the data packet is received incorrectly, maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet.
  • the received data packet may also be cached in the first automatic retransmission buffer block, or the received data packet and the buffered data packet in the first automatic retransmission buffer block Perform merge processing, and cache the merged data packet into the first automatic retransmission cache block.
  • the lifetime of the first automatic retransmission cache block corresponding to the maintenance data packet includes at least one of the following.
  • the method further includes: configuring a lifetime of the first automatic retransmission cache block for the data packet.
  • the third predetermined condition includes any one of the following.
  • the new transmission instruction information carried in the data packet indicates a new transmission data packet
  • the third predetermined number carried in the data packet is not the same as the third predetermined number carried in the data packet cached in all the automatic retransmission cache blocks in the automatic retransmission buffer area.
  • the third predetermined number carried in the data packet is different from the third predetermined number carried in the data packet cached in the automatic retransmission cache block in the automatic retransmission buffer area.
  • the received data packet is a newly transmitted data packet.
  • the received data packet is a retransmission data packet, but the lifetime of the automatic retransmission cache block previously maintained by the data packet has ended, that is, the automatic retransmission cache block has been emptied or overwritten.
  • the fourth predetermined condition includes any one of the following.
  • the new transmission instruction information carried in the data packet indicates a retransmission data packet.
  • the third predetermined number carried by the data packet buffered by the second automatic retransmission buffer block is the same as the third predetermined number carried by the received data packet.
  • the third predetermined number includes any one of the following: a packet sequence number, and a site identifier that sends the data packet.
  • the site identifier includes any one of the following: an association identifier, a partial association identifier, and a Media Access Control (MAC) address.
  • an association identifier e.g., an association identifier, a partial association identifier, and a Media Access Control (MAC) address.
  • MAC Media Access Control
  • part of the association identifier may be a part of the association identifier, or calculated according to the association identifier.
  • the lifetime of the automatic retransmission cache block may be maintained in a timing or countdown manner.
  • any of the following methods may be used to determine whether the received data packet is a newly transmitted data packet or a retransmitted data packet.
  • the first way judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet.
  • the new transmission instruction information indicates a new transmission data packet
  • the received data packet is determined Retransmit the data packet.
  • the second method determine whether the third predetermined number carried in the data packet is the same as the third predetermined number carried in the data packet buffered in the automatic retransmission buffer block. In some embodiments, when the third predetermined number carried by the data packet is not the same as the third predetermined number carried by the data packet cached in the automatic retransmission buffer block, it is determined that the received data packet is a newly transmitted data packet; When the second automatic retransmission buffer block exists in the automatic retransmission buffer area, it is determined that the received data packet is a retransmission data packet.
  • the method further includes the following step 402.
  • Step 402 When the lifetime of the first automatic retransmission cache block corresponding to the data packet expires, empty or re-cover the first automatic retransmission cache block corresponding to the data packet.
  • the automatic retransmission cache block when the lifetime of the automatic retransmission cache block expires, the automatic retransmission cache block is emptied or re-covered, so that the automatic retransmission cache block is released in time. Under the premise that the number of automatic retransmission cache blocks is limited, the Cache new data packets in time, thereby improving transmission efficiency.
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • the lifetime may be a valid time length T, that is, the time interval from the time when the automatic retransmission request process is created or configured to the time when the automatic retransmission request process is removed, T It may be a value notified by the access point site, or a value negotiated between the non-access site and the access point site, or a value determined by the non-access site itself, or a value predefined by the system.
  • the site can take the time or countdown method during the maintenance life.
  • the transmission method includes the following steps.
  • STA1 When the sender STA1 sends a newly transmitted data packet 1, STA1 creates or configures an automatic retransmission request process for the data packet 1, and the timer t2 corresponding to the automatic retransmission request process starts timing.
  • the first method is to retransmit the data packet 1 or retransmit the data packet 2 different from the redundant version of the data packet 1 when the channel is competed through the contention access mechanism.
  • the first predetermined time interval all times within the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver that received the data packet 1 are within the lifetime of the automatic retransmission request process by default. Therefore, the first predetermined After the time interval, the lifetime does not expire, and the data packet 1 or the data packet 2 different from the redundant version of the data packet 1 may be retransmitted after the first predetermined time interval.
  • the received response received by the receiver is incorrect Retransmit data packet 1 or data packet 2 that is different from the redundant version of data packet 1 after the first predetermined time interval after the confirmation frame; the first predetermined time after receiving the incorrect response confirmation frame from the receiver
  • the life of the automatic retransmission request process is extended to the first reservation after receiving the incorrect reception confirmation frame returned by the receiver
  • a third predetermined time interval after the time interval wherein, the third predetermined time interval is at least the time required to retransmit the data packet 1 or the data packet 2 that is different from the redundant version of the data packet 1;
  • the reception of the reply incorrectly confirms the retransmission of data packet 1 or data packet 2 different from the redundant version of data packet 1 after the first predetermined time interval after the frame.
  • the data is retransmitted after the first predetermined time interval Packet 1 or data packet 2 that is different from the redundant version of data packet 1; part or all of the time within the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver at the automatic retransmission
  • the lifetime of the request process is outside, when the lifetime of the automatic retransmission request process expires, the automatic retransmission request process is removed, that is, the first reservation after receiving the incorrect reception confirmation frame returned by the receiver After the time interval, data packet 1 or data packet 2 that is different from the redundant version of data packet 1 is not retransmitted.
  • the redundancy version of each retransmitted data packet may be the same or different.
  • STA1 stops retransmitting data packet 1 or data packet 2 that is different from the redundant version of data packet 1.
  • STA1 maintains a lifetime of 100 ms for each automatic retransmission request process, STA1 transmits a new data packet 1 to STA2, STA1 configures automatic retransmission request process 1 for data packet 1, and corresponding to automatic retransmission request process 1
  • the redundancy version 2 of the data packet 1 is transmitted, so that until one of the following situations occurs, the transmission of the data packet 1 or the data packet 2 different from the redundancy version of the data packet 1 is stopped.
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • the lifetime may be a valid time length T, and T may be a value notified by the access point site, or a value negotiated by the non-access site and the access point site, or may be determined by the non-connected site. The value determined by the site itself, or a value predefined by the system.
  • the site can take the time or countdown method during the maintenance life.
  • the transmission method includes the following steps.
  • STA1 When the sender STA1 sends a newly transmitted data packet 1, STA1 creates or configures an automatic retransmission request process for the data packet 1, and the timer t2 corresponding to the automatic retransmission request process starts timing.
  • STA1 does not receive the correct acknowledgement frame received from the receiver of data packet 1 within the second predetermined time interval, retransmits data packet 1 or retransmits the redundancy of data packet 1 Data packet 2 with a different version; if T has not yet been counted, and the correct confirmation frame of the receiver is not received within the second predetermined time interval, retransmit the data packet 1 or retransmit the data packet 1 Packets 2 with different redundancy versions, and repeat the above process before time T arrives.
  • the schematic diagram of frame interaction is shown in Figure 6.
  • STA1 stops retransmitting the data packet 1 and the data packet 2 different from the redundancy version of the data packet 1 in the following cases.
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • the lifetime may be a valid time length T, and T may be a value notified by the access point site, or a value negotiated by the non-access site and the access point site, or by the non-access The value determined by the site itself, or a value predefined by the system.
  • the site can take the time or countdown method during the maintenance life.
  • the transmission method includes the following steps.
  • the receiver STA2 receives the data packet, judges that the data packet is received incorrectly, and the data packet is a newly transmitted data packet. STA2 also obtains the first predetermined number carried by the data packet, and starts the automatic re-sending corresponding to the first predetermined number. The timer t3 of the transmission request process. When t3 reaches T, STA2 removes or ends the automatic retransmission request process.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • STA2 determines whether the data packet is a newly transmitted data packet, including but not limited to one of the following.
  • the process number carried in the data packet is the same as the process number corresponding to the automatic retransmission request process that has been created or configured or is being maintained, it is determined whether it is a newly transmitted data packet; specifically, when the process number and When the process number corresponding to the automatic retransmission request process that has been created or configured or being maintained is the same, the data packet is judged to be a retransmission data packet; when the process number carried in the data packet is the same as the automatic retransmission that has been created or configured or is being maintained When the process numbers corresponding to the requesting processes are different, it is determined that the data packet is a newly transmitted data packet.
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • mapping relationship between the lifetime and the second predetermined number includes any one of the following.
  • the life period of the automatic retransmission request process is identified by the effective time length or the remaining time length, and the remaining time length of the life period or the effective time length of the life period of the automatic retransmission request process forms a mapping relationship with the second predetermined number b )
  • the identifier of the number of times of use of the lifetime of the automatic retransmission request process, and the total number of times or the remaining times of the lifetime form a mapping relationship with the second predetermined number.
  • the receiving party STA2 receives the data packet, and STA2 obtains the second predetermined number of the data packet.
  • STA2 obtains the second predetermined number of the data packet.
  • the mapping relationship between the end time of the period can be obtained from the second predetermined number of the data packet to obtain the remaining time length of the life cycle of the automatic retransmission request process or the end time point of the life cycle, when the remaining time length ends or reaches life
  • STA2 removes or ends the automatic retransmission request process.
  • the receiving party STA2 receives the data packet, STA2 obtains the second predetermined number of the data packet, and STA2 according to the predefined second predetermined number and the remaining number of lifetimes of the automatic retransmission request process Mapping relationship, the remaining number of lifetimes of the automatic retransmission request process can be obtained from the second predetermined number of the data packet.
  • STA2 removes or ends the automatic retransmission request process.
  • the mapping relationship between the second predetermined number and the lifetime of the automatic retransmission request process is shown in Table 1.
  • STA2 receives a data packet
  • STA2 obtains the redundancy version number of the data packet as n2, and STA2 according to the predefined
  • the mapping relationship between the second predetermined number and the life time of the automatic retransmission request process, the life time of the automatic retransmission request process is V2.
  • STA2 receives the data packet from The time starts from 0, and when the time reaches V2, the automatic retransmission request process corresponding to the data packet is removed or ended.
  • Table 1 Mapping relationship between the second reservation number and the lifetime of the automatic retransmission request process
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • the lifetime may be an effective time length T.
  • the sender or receiver maintains a timer for each automatic retransmission request process.
  • the transmission method includes the following steps.
  • the above process includes but is not limited to: during the execution of the above automatic retransmission request process, STA1 will retransmit the data packet 1 or the redundancy version different from the data packet 1 when the data packet 1 is not correctly received ⁇ ⁇ 2 ⁇ The data packet 2.
  • Sending a data packet 2 that is different from the redundancy version of data packet 1 and the data packet 1 have the same sequence number, and have the same valid information but different redundant information, where the valid information is information bits to be transmitted before encoding .
  • STA1 sends data packet 1 or data packet 2 that is different from the redundant version of data packet 1 in the foregoing automatic retransmission request process and also carries time-length information, which is used to indicate the current data packet 1 or data
  • time-length information which is used to indicate the current data packet 1 or data
  • the remaining length of the lifetime of the automatic retransmission request process corresponding to the data packet 2 with a different redundancy version of the packet 1, or the data packet 2 used to indicate the current data packet 1 or the redundancy version different from the data packet 1 The end point of the lifetime of the corresponding automatic retransmission request process.
  • the receiver STA2 can obtain the remaining time length when receiving the above data packet from STA1 or a data packet different from the redundancy version of the data packet, and when the remaining time length is zero, remove or end the automatic Retransmission request process.
  • STA2 can obtain the end time of the life cycle of the automatic retransmission request process when it receives the above data packet 1 from STA1 or the data packet 2 different from the redundant version of the data packet 1, and arrives at the end time Time, remove or end the automatic retransmission request process.
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a life period for each automatic retransmission request process, and the life period of different automatic retransmission request processes may be the same or different.
  • the lifetime may be the total number of newly transmitted data packets and retransmitted data packets.
  • the retransmission packet of the data packet has the same packet sequence number, and carries the same valid information as the data packet, the same or different redundant information, wherein the valid information is to be transmitted before encoding Information bits.
  • STA1 as the receiver maintains N times for each automatic retransmission request process, that is, the total number of times STA1 receives a data packet and retransmits the data packet for the data packet is N times.
  • STA1 receives a data packet, and determines whether the data packet is a newly transmitted data packet.
  • STA1 starts counting the counter corresponding to the automatic retransmission request process corresponding to the first predetermined number of the data packet.
  • STA1 judges whether the data packet is the same as the process number or packet sequence number corresponding to a current automatic retransmission request process. When the process number or packet sequence number is the same, the corresponding counter is incremented; when the process number or packet sequence number corresponding to the current automatic retransmission request process is different for each data packet, STA1 automatically retransmits the first predetermined number of the data packet The counter corresponding to the request process starts counting.
  • STA1 removes the corresponding automatic retransmission request process.
  • the method for STA1 to determine whether the data packet is a newly transmitted data packet includes but is not limited to one of the following:
  • the stations in the BSS can simultaneously support one or more automatic retransmission request processes.
  • the station maintains a lifetime for each automatic retransmission request process.
  • the life span of different automatic retransmission request processes may be the same or different.
  • the lifetime may be the data packet and the remaining transmission times of the retransmitted data packet of the data packet.
  • the retransmission packet of the data packet carries the same valid information as the data packet, and the same or different redundant information.
  • the valid information is information bits to be transmitted before encoding.
  • the sender STA1 carries a lifetime in the transmitted data packet, and the lifetime indicates the current data packet and the remaining number of retransmissions of the data packet.
  • STA1 carries the lifetime indication in the newly transmitted data packet as the remaining number of times is N, and carries the lifetime indication in the second transmission of the data packet with the same packet sequence number or the retransmission data packet The remaining transmission times are N-1, and so on.
  • STA2 may carry the lifetime in all or part of the data packets or retransmission packets of the same packet sequence number sent.
  • the receiver STA2 receives one or more of the above data packets, that is, it can obtain the lifetime of the automatic retransmission request process where the current data packet is located.
  • STAs stations that form a basic service set (BSS, Basic Service Set).
  • BSS Basic Service Set
  • the station When the station is the receiver, its total cache area contains the automatic retransmission request cache area, and the automatic retransmission request cache area is divided into one or more automatic retransmission cache blocks.
  • the station maintains a timer for each automatic retransmission cache block.
  • the schematic diagram of the automatic retransmission request buffer area is shown in Figure 3.
  • the station stores the data packets with the same packet sequence number in the same automatic retransmission cache block, and starts counting from the first data packet containing a certain packet sequence number in a certain automatic retransmission cache block.
  • the station supports caching the same packet sequence number
  • the maximum duration of the data packet is T, where T is the life cycle of the data packet corresponding to the sequence number of a packet cached by the automatic retransmission cache block.
  • STA1 receives a data packet, judges that the data packet is received incorrectly, and obtains that the packet sequence number of the data packet is M.
  • the automatic retransmission buffer block is denoted as B1, and the timer t1 corresponding to B1 starts timing.
  • the data packet is cached in the automatic retransmission buffer block (here referred to as B2) corresponding to the data packet with the same packet sequence number M; or
  • B2 the automatic retransmission buffer block
  • the data packet is merged with the data packet cached in B2, and the merged data packet is cached in B2, and B2 corresponds to a timer t2.
  • STA1 may, but not limited to, determine whether the current data packet is based on whether there is an automatic retransmission cache block in the automatic retransmission request buffer area that caches a data packet having the same packet sequence number as the current data packet New retransmission packet: When there is no automatic retransmission cache block in the automatic retransmission request cache area for the data packet with the packet number M, the current transmission is a new transmission packet; when there is a cache in the automatic retransmission request cache area When the automatic retransmission cache block of the data packet whose packet number is M, the current transmission is a non-new transmission data packet.
  • STA1 When the timer counts to T, STA1 clears the corresponding automatic retransmission buffer block in the automatic retransmission request buffer area, and resets the timer. In the above example, when t1 counts to T, STA1 clears B1 and resets t1; when t2 counts to T, STA1 clears B2 and resets t2.
  • STA1 When STA1 receives the data packet incorrectly, if the packet sequence number of the data packet is not acquired, STA1 discards the data packet.
  • STA1 receives the data packet correctly and obtains the packet sequence number of the data packet as N.
  • the site in the BSS When the site in the BSS is the receiver, its total cache area contains the automatic retransmission request cache area, in which the automatic retransmission request cache area is divided into one or more automatic retransmission cache blocks, and the site provides each automatic retransmission cache block. Maintain a timer.
  • the site puts the data packets from the same sender in the same cache block, where the sender is identified by the association identifier carried in the data packet, or part of the association identifier or Media Access Control (MAC, Media Access Control) address, etc.
  • the unit is called the station identifier (SID, STA Identifier).
  • the station starts counting from the first data packet that contains a certain SID in a certain cache block.
  • the maximum duration of the station supporting the buffering of the same SID is T, where T is the automatic retransmission cache block to cache the data corresponding to a SID
  • T is the automatic retransmission cache block to cache the data corresponding to a SID
  • STA1 receives multiple data packets from multiple sites at the same time, and the SIDs of these multiple sites are k1, k2, ... kn; STA1 determines whether each data packet is received correctly. To cache the data packet in the automatic retransmission cache block corresponding to the SID of the site that sent the data packet.
  • STA1 receives a data packet from a site with a site identification of k1, and determines that the reception is incorrect.
  • STA1 clears or rewrites the corresponding automatic retransmission cache block in the automatic retransmission request buffer area, and resets the timer.
  • the station maintains a lifetime for each automatic retransmission request process.
  • the life span of different automatic retransmission request processes may be the same or different.
  • the life period is jointly indicated by the duration information and the number of transmissions. That is, when one of the following conditions is met, the automatic retransmission request process is removed or ended.
  • the sender sends a data packet or sends different redundant versions of the data packet carrying lifetime information, which includes the remaining time T of the current automatic retransmission request process and the remaining number of transmissions N of the current automatic retransmission request process .
  • the receiver receives the above data packets, obtains T and N, and counts and counts respectively.
  • the automatic retransmission request process is removed. For example, when the countdown reaches 0 and the countdown has not reached 0, the automatic retransmission request process is removed; or when the countdown reaches 0 and the countdown has not reached 0, the automatic retransmission request process is removed.
  • another embodiment of the present invention provides a transmission device, including a creation module 701.
  • the creation module 701 is used to create an automatic retransmission request process of the first data packet; set the life period of the automatic retransmission request process; and send the first data packet.
  • the creation module 701 may create an automatic retransmission request process of the first data packet before sending the first data packet, or create an automatic retransmission request of the first data packet when sending the first data packet Process, or create an automatic retransmission request process for the first data packet after sending the first data packet. That is to say, the absolute value of the difference between the time when the first data packet is sent and the time when the automatic retransmission request process for creating the first data packet is within a predetermined time threshold.
  • the first data packet may be a newly transmitted data packet or a retransmitted data packet, which is not limited in this embodiment of the present invention.
  • the creation module 701 is further configured to: start maintaining the lifetime of the automatic retransmission request process.
  • the creation module 701 may maintain the lifetime of the automatic retransmission request process through a timer or counter.
  • the lifetime includes at least one of the following: length of time, end time of the lifetime, and number of times.
  • the length of time includes any one of the following: the effective time length and the remaining time length.
  • the number of times includes any one of the following: the total number of newly transmitted data packets and retransmitted data packets carrying the same first predetermined number as the new transmitted data packets, the number of newly transmitted data packets and retransmitted and The total number of remaining times of the data packet of the first predetermined number with the same newly transmitted data packet, the total number of times of retransmitting the data packet, and the remaining number of times of retransmitting the data packet.
  • the effective time length refers to the time interval from when the automatic retransmission request process is created or configured to when the automatic retransmission request process is removed.
  • the remaining time length refers to the time interval from the current moment to the time when the automatic retransmission request process is removed.
  • the end time of the lifetime refers to the time when the automatic retransmission request process is removed.
  • the lifetime of the automatic retransmission request process may be maintained by a timer, which may be specifically counted or counted down.
  • the lifetime of the automatic retransmission request process can be maintained by a counter, which can be counted or counted down.
  • the embodiment of the present invention does not limit the time when the creation module 701 starts to maintain the life of the automatic retransmission request process.
  • the life of the automatic retransmission request process can be started when the life of the automatic retransmission request process is set.
  • a retransmission module 702 is also included.
  • the retransmission module 702 is configured to retransmit the second data packet when the preset retransmission conditions are met during the lifetime of the automatic retransmission request process; the first data packet and the second data packet carry the same first Reservation number.
  • the creation module 701 determines whether the preset retransmission conditions are met during the lifetime of the automatic retransmission request process in the retransmission module 702, and continues to maintain the automatic retransmission request process during the process of retransmitting the second data packet Of life.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the creation module 701, the retransmission module 702, and the first removal module 703 may obtain the life period in any of the following ways.
  • the first way obtain according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number of the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number of the data packet.
  • the third way according to the life of the notification.
  • the fourth way according to the negotiated lifetime.
  • the fifth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the preset retransmission condition includes at least one of the following.
  • the time to compete for the channel through the contention access mechanism is within the lifetime of the automatic retransmission request process.
  • the confirmation frame includes receiving a correct confirmation frame or receiving an incorrect confirmation frame.
  • the retransmission module 702 may use any of the following methods to retransmit the second data packet.
  • the second data packet is retransmitted after the first predetermined time interval (for example, Short Frame InterFrame Space (SIFS)) after receiving the incorrect confirmation frame received by the receiver.
  • the first predetermined time interval for example, Short Frame InterFrame Space (SIFS)
  • the second data packet is retransmitted when the channel is competed according to the contention access mechanism.
  • the received response received by the receiver is incorrect
  • the second data packet is retransmitted after the first predetermined time interval after the acknowledgment frame; part or all of the time within the first predetermined time interval after receiving the incorrect acknowledge frame received by the receiver is automatically retransmitted at the time
  • the request process is out of life, extend the life of the automatic retransmission request process to a third predetermined time interval after the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver;
  • the third predetermined time interval is at least the time required to retransmit the second data packet; and the second data packet is retransmitted after the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver.
  • the reception of the receiver's response is incorrect
  • the second data packet is retransmitted after the first predetermined time interval after the acknowledgment frame; part or all of the time within the first predetermined time interval after receiving the incorrect acknowledge frame received by the receiver is automatically retransmitted at the time
  • the lifetime of the request process is outside, when the lifetime of the automatic retransmission request process expires, the automatic retransmission request process is removed, that is, the first reservation after receiving the incorrect reception confirmation frame returned by the receiver After the time interval, the second data packet is not retransmitted.
  • the first data packet or the second data packet also carries at least one of a lifetime, an end time of the lifetime, a remaining length of time, and a remaining number of times.
  • the second data packet is the same as the first data packet, or the redundancy version of the second data packet and the first data packet is different.
  • it further includes: a first removing module 703.
  • the first removal module 703 is used to remove or end the automatic retransmission request process when the life span of the automatic retransmission request process expires, or when a correct confirmation frame received by the receiver is received.
  • the life span expiration refers to the length of time indicated by the timer reaching the life span.
  • the life span expiration means that the timer reaches the end time.
  • the life span expiration refers to the number of times the counter reaches the life span.
  • the life span expiration refers to any one of the following conditions: the timer reaches the length of time indicated by the life span; the counter count reaches the life span. The indicated number of times.
  • the life cycle expiration means that any of the following conditions are met: the timer reaches the end time of the life cycle; the counter count reaches the life cycle indication frequency.
  • the expiration of the lifetime means that the timer counts to 0;
  • the expiry of the lifetime means that the counter counts to 0;
  • the expiration of the lifetime means that any of the following conditions are met: the timer counts to 0; the counter counts to 0.
  • the first removal module 703 is specifically configured to implement at least one of the following ways to remove or end the automatic retransmission request process.
  • the embodiment of the present invention removes or ends the automatic retransmission request process corresponding to the first data packet or the second data packet when the life span of the automatic retransmission request process expires, or when a correct confirmation frame received by the receiver is received. In this way, the automatic retransmission request process is removed in time. Under the premise that the number of automatic retransmission request processes supported at the same time is limited, a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • another embodiment of the present invention provides a transmission device, including: a first receiving module 801 and a first maintenance module 802.
  • the first receiving module 801 is used to receive a data packet
  • the first maintenance module 802 is configured to maintain the lifetime of the automatic retransmission request process corresponding to the first predetermined number when it is determined that the data packet is received incorrectly and the first predetermined number carried in the data packet is obtained.
  • the transmission device further includes: a second removal module 803.
  • the second removal module 803 is used to remove or end the automatic retransmission request process when the life of the automatic retransmission request process expires.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the first maintenance module 802 is specifically configured to implement maintenance of the life period of the automatic retransmission request process corresponding to the first predetermined number in at least one of the following ways.
  • the first way when the received data packet meets the first predetermined condition, start to maintain the lifetime of the automatic retransmission request process corresponding to the first predetermined number.
  • the timer when a timer is used to maintain the lifetime of the automatic retransmission request process, the timer can be started or counted down; when a counter is used to maintain the lifetime of the automatic retransmission request process, the counter can be started to count or Count down.
  • the timer when a timer is used to maintain the lifetime of the automatic retransmission request process, the timer can be continued or counted down, or based on the regained lifetime; when a counter is used to maintain the automatic retransmission request process During the lifetime, the counter can continue to count or count down, or count or count down according to the regained lifetime.
  • the first predetermined condition includes that the received data packet is a newly transmitted data packet; or, the first predetermined number of the received data packet corresponds to the currently maintained automatic retransmission request process. One reservation number is different.
  • the second predetermined condition includes that the received data packet is a retransmission data packet.
  • the first maintenance module 802 is specifically configured to implement any one of the following methods to determine whether the received data packet is a newly transmitted data packet or a retransmitted data packet.
  • the first type judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet.
  • the new transmission instruction information indicates a newly transmitted data packet
  • the new transmission instruction information indicates a retransmitted data packet
  • the received data packet is determined
  • the data packet is a retransmission data packet.
  • the second method is to determine whether the process number carried in the data packet is the same as the process number corresponding to the created or configured automatic retransmission request process. In some embodiments, when the process number carried in the data packet and the process number corresponding to the created or configured automatic retransmission request process are not the same, it is determined that the received data packet is a newly transmitted data packet; when the created or When there is an automatic retransmission request process with the same process number as the process number carried in the data packet in the configured automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • the third method is to determine whether the packet sequence number carried in the data packet is the same as the packet sequence number corresponding to the created or configured automatic retransmission request process. In some embodiments, when the packet sequence number carried in the data packet is different from the packet sequence number corresponding to the created or configured automatic retransmission request process, it is determined that the received data packet is a newly transmitted data packet; when the created or When there is an automatic retransmission request process with the same packet sequence number as the packet sequence number carried in the data packet in the configured automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • the first maintenance module 802 may maintain the lifetime of the automatic retransmission request process through a timer or counter.
  • the life span includes at least one of the following: length of time, end time of the life span, and number of times.
  • the length of time includes any one of the following: the effective time length and the remaining time length.
  • the number of times includes any one of the following: the total number of newly transmitted data packets and retransmissions of data packets carrying the same first predetermined number as the new transmitted data packets, newly transmitted data packets, and retransmissions The total remaining number of times of the data packet carrying the same first predetermined number as the newly transmitted data packet, the total number of times of retransmitting the data packet, and the remaining number of times of retransmitting the data packet.
  • the effective time length refers to the time interval from when the automatic retransmission request process is created or configured to when the automatic retransmission request process is removed.
  • the remaining time length refers to the time interval from the current moment to the time when the automatic retransmission request process is removed.
  • the end time of the lifetime refers to the time when the automatic retransmission request process is removed.
  • the lifetime of the automatic retransmission request process can be maintained by a timer. Specifically, it can be timed or counted down, that is, to receive After the received packet is created or the automatic retransmission request process is configured, a timer is started to start counting or counting down.
  • the lifetime of the automatic retransmission request process can be maintained by a counter, which can be counted or counted down, that is, after the automatic retransmission request process is created or configured for the received data packet, the counter is started to start counting or counting down.
  • the first maintenance module 802 and the second removal module 803 can obtain the lifetime in any of the following ways.
  • the first way Obtained according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the third way obtained according to the lifetime carried in the data packet.
  • the fourth way according to the life of the notification.
  • the fifth way according to the negotiated life cycle.
  • the sixth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the life span expiration refers to the length of time indicated by the timer reaching the life span.
  • the life span expiration means that the timer reaches the end time.
  • the life span expiration refers to the number of times indicated by the counter reaching the life span
  • the life span expiration refers to any one of the following conditions: the timer reaches the length of time indicated by the life span; the counter count reaches the life span. The indicated number of times.
  • the life cycle expiration means that any of the following conditions are met: the timer reaches the end time of the life cycle; the counter count reaches the life cycle indication frequency.
  • the life cycle expires means the timer counts to 0.
  • the expiry of the lifetime means that the counter counts to zero.
  • the expiration of the lifetime means that any of the following conditions are met: the timer counts to 0; the counter counts to 0.
  • the first maintenance module 802 is further configured to: when it is determined that the data packet is received incorrectly, and the received data packet is a newly transmitted data packet, and the first data carried in the data packet cannot be obtained A predetermined number; or, if it is determined that the data packet is received incorrectly, and the received data packet is a retransmission data packet, and the first predetermined number carried in the data packet cannot be obtained, the data packet is discarded.
  • the automatic retransmission request process corresponding to the first data packet or the second data packet is removed or ended, so that the automatic retransmission request process is removed in time,
  • a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • another embodiment of the present invention provides a transmission device, including: a second receiving module 901 and a second maintenance module 902.
  • the second receiving module 901 is used to receive a data packet.
  • the second maintenance module 902 is configured to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet when it is determined that the data packet is received incorrectly.
  • the second maintenance module 902 is further configured to: cache the received data packet in the first automatic retransmission buffer block, or, the received data packet and the first automatic retransmission The cached data packets in the cache block are merged, and the merged data packets are cached in the first automatic retransmission cache block.
  • the second maintenance module 902 is specifically configured to implement the maintenance period of the first automatic retransmission cache block corresponding to the maintenance data packet in at least one of the following ways.
  • the first way when the data packet meets the third predetermined condition, start to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet.
  • the second way when the data packet meets the fourth predetermined condition, continue to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet.
  • the method further includes: configuring the life cycle of the first automatic retransmission cache block for the data packet.
  • the third predetermined condition includes that the new transmission indication information carried in the data packet indicates a new transmission data packet; or, the third predetermined number carried in the data packet and all automatic retransmissions in the automatic retransmission buffer area
  • the third predetermined numbers carried in the data packets buffered in the transmission buffer block are different.
  • the third predetermined number carried in the data packet is different from the third predetermined number carried in the data packet cached in the automatic retransmission cache block in the automatic retransmission buffer area.
  • the received data packet is a newly transmitted data packet.
  • the received data packet is a retransmission data packet, but the lifetime of the automatic retransmission cache block previously maintained by the data packet has ended, that is, the automatic retransmission cache block has been emptied or overwritten.
  • the fourth predetermined condition includes any of the following.
  • the new transmission instruction information carried in the data packet indicates a retransmission data packet.
  • the third predetermined number carried by the data packet buffered by the second automatic retransmission buffer block is the same as the third predetermined number carried by the received data packet.
  • the packet number of the third predetermined number packet or the identifier of the site that sent the data packet is not limited to the packet number of the third predetermined number packet or the identifier of the site that sent the data packet.
  • the site identifier includes any one of an association identifier, a partial association identifier, and a media access control (MAC, Media Access Control) address.
  • MAC Media Access Control
  • the second maintenance module 902 is specifically configured to determine whether the received data packet is a newly transmitted data packet or a retransmitted data packet in any of the following ways.
  • the first way judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet.
  • the new transmission instruction information indicates a new transmission data packet
  • the received data packet is determined Retransmit the data packet.
  • the second method determine whether the third predetermined number carried in the data packet is the same as the third predetermined number carried in the data packet buffered in the automatic retransmission buffer block. In some embodiments, when the third predetermined number carried by the data packet is not the same as the third predetermined number carried by the data packet cached in the automatic retransmission buffer block, it is determined that the received data packet is a newly transmitted data packet; When the second automatic retransmission buffer block exists in the automatic retransmission buffer area, it is determined that the received data packet is a retransmission data packet.
  • the second maintenance module 902 may maintain the life time of the automatic retransmission cache block in a timing or countdown manner.
  • the emptying module 903 is configured to empty or re-cover the first automatic retransmission cache block corresponding to the data packet when the lifetime of the first automatic retransmission cache block corresponding to the data packet expires.
  • the automatic retransmission cache block when the lifetime of the automatic retransmission cache block expires, the automatic retransmission cache block is emptied or re-covered, so that the automatic retransmission cache block is released in time. Under the premise that the number of automatic retransmission cache blocks is limited, the Cache new data packets in time, thereby improving transmission efficiency.
  • Another embodiment of the present invention provides a transmission device, including a processor and a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions are executed by the processor, the A transmission method.
  • Another embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above-mentioned transmission methods are implemented.
  • another embodiment of the present invention provides a transmission system, including: a first sender 1001 and a first receiver 1002.
  • the first sender 1001 is used to create an automatic retransmission request process of the first data packet; set a life period of the automatic retransmission request process; and send the first data packet.
  • the first receiver 1002 is used to receive the data packet; when it is determined that the data packet is received incorrectly and the first predetermined number carried in the data packet is obtained, the automatic retransmission request process corresponding to the first predetermined number is maintained Lifetime.
  • the first sender 1001 may create an automatic retransmission request process of the first data packet before sending the first data packet, or create an automatic retransmission request of the first data packet when sending the first data packet Process, or create an automatic retransmission request process for the first data packet after sending the first data packet.
  • the absolute value of the difference between the time when the first sender 1001 sends the first data packet and the time for creating the automatic retransmission request process of the first data packet is within a predetermined time threshold.
  • the first data packet may be a newly transmitted data packet or a retransmitted data packet, which is not limited in this embodiment of the present invention.
  • the first sender 1001 is also used to: start maintaining the lifetime of the automatic retransmission request process.
  • the first sender 1001 and the first receiver 1002 may maintain the lifetime of the automatic retransmission request process through a timer or counter.
  • the lifetime includes at least one of the following: length of time, end time of the lifetime, and number of times.
  • the length of time includes any one of the following: effective time length and remaining time length;
  • the number of times includes any one of the following: the total number of newly transmitted data packets and retransmitted data packets carrying the same first predetermined number as the new transmitted data packets, new transmitted data packets, and retransmitted carrying and new The total number of remaining times of the data packet of the first predetermined number with the same data packet, the total number of times of retransmitting the data packet, and the remaining number of times of retransmitting the data packet.
  • the effective time length refers to the time interval from when the automatic retransmission request process is created or configured to when the automatic retransmission request process is removed.
  • the remaining time length refers to the time interval from the current moment to the time when the automatic retransmission request process is removed.
  • the end time of the lifetime refers to the time when the automatic retransmission request process is removed.
  • the lifetime of the automatic retransmission request process may be maintained by a timer, which may be specifically counted or counted down.
  • the lifetime of the automatic retransmission request process can be maintained by a counter, which can be counted or counted down.
  • the embodiment of the present invention does not limit the time to start maintaining the lifetime of the automatic retransmission request process.
  • the lifetime of the automatic retransmission request process may be started when the lifetime of the automatic retransmission request process is set.
  • the first sender 1001 may obtain the lifetime in any of the following ways:
  • the first way obtain according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number of the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number of the data packet.
  • the third way according to the life of the notification.
  • the fourth way according to the negotiated lifetime.
  • the fifth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the first sender 1001 is further configured to: when the preset retransmission conditions are met during the lifetime of the automatic retransmission request process, retransmit the second data packet; the first data packet and The second data packet carries the same first predetermined number.
  • the first sender 1001 continues to maintain the life of the automatic retransmission request process during the process of determining whether the preset retransmission conditions are met during the lifetime of the automatic retransmission request process, and retransmitting the second data packet period.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the preset retransmission condition includes at least one of the following.
  • the time to compete for the channel through the contention access mechanism is within the lifetime of the automatic retransmission request process.
  • a confirmation frame returned by the receiver is not received within the second predetermined time interval, and the confirmation frame includes receiving a correct confirmation frame or receiving an incorrect confirmation frame.
  • the first sender 1001 when receiving the incorrect reception confirmation frame returned by the receiver, may use any of the following methods to retransmit the second data packet.
  • the second data packet is retransmitted after the first predetermined time interval (for example, Short Frame InterFrame Space (SIFS)) after receiving the incorrect confirmation frame received by the receiver.
  • the first predetermined time interval for example, Short Frame InterFrame Space (SIFS)
  • the second data packet is retransmitted when the channel is competed according to the contention access mechanism.
  • the received response received by the receiver is incorrect
  • the second data packet is retransmitted after the first predetermined time interval after the acknowledgment frame; part or all of the time within the first predetermined time interval after receiving the incorrect acknowledge frame received by the receiver is automatically retransmitted at the time
  • the request process is out of life, extend the life of the automatic retransmission request process to a third predetermined time interval after the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver;
  • the third predetermined time interval is at least the time required to retransmit the second data packet; and the second data packet is retransmitted after the first predetermined time interval after receiving the incorrect confirmation frame received by the receiver.
  • the reception of the receiver's response is incorrect
  • the second data packet is retransmitted after the first predetermined time interval after the acknowledgment frame; part or all of the time within the first predetermined time interval after receiving the incorrect acknowledge frame received by the receiver is automatically retransmitted at the time
  • the lifetime of the request process is outside, when the lifetime of the automatic retransmission request process expires, the automatic retransmission request process is removed, that is, the first reservation after receiving the incorrect reception confirmation frame returned by the receiver After the time interval, the second data packet is not retransmitted.
  • the first data packet or the second data packet also carries
  • the second data packet is the same as the first data packet, or the redundancy version of the second data packet and the first data packet is different.
  • the first sender 1001 is further configured to: when the life of the automatic retransmission request process expires, or when receiving a correct confirmation frame received by the receiver, remove or end the automatic Retransmission request process.
  • the life span expiration refers to the length of time indicated by the timer reaching the life span.
  • the life span expiration means that the timer reaches the end time.
  • the life span expiration refers to the number of times the counter reaches the life span.
  • the life span expiration refers to any one of the following conditions: the timer reaches the length of time indicated by the life span; the counter count reaches the life span. The indicated number of times.
  • the life cycle expiration means that any of the following conditions are met: the timer reaches the end time of the life cycle; the counter count reaches the life cycle indication frequency.
  • the life cycle expires means the timer counts to 0.
  • the expiry of the lifetime means that the counter counts to zero.
  • the expiration of the lifetime means that any of the following conditions are met: the timer counts to 0; the counter counts to 0.
  • the first sender 1001 is specifically configured to implement at least one of the following ways to remove or end the automatic retransmission request process.
  • the first way stop sending the first data packet or retransmit the second data packet.
  • the second way stop sending the data packet carrying the first predetermined number.
  • the third way stop using the automatic retransmission request mechanism to send the first data packet or retransmit the second data packet.
  • the embodiment of the present invention removes or ends the automatic retransmission request process corresponding to the first data packet or the second data packet when the life span of the automatic retransmission request process expires, or when a correct confirmation frame received by the receiver is received. In this way, the automatic retransmission request process is removed in time. Under the premise that the number of automatic retransmission request processes supported at the same time is limited, a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • the first predetermined number includes at least one of the following: a process number and a packet sequence number.
  • the first receiver 1002 when the first receiver 1002 determines that the data packet is received incorrectly, it can reply to receive the incorrect confirmation frame; or do not reply any information; when it is determined that the data packet is received correctly, reply to receive the correct confirmation frame .
  • the first receiver 1002 is specifically configured to implement the maintenance of the life cycle of the automatic retransmission request process corresponding to the first predetermined number in at least one of the following ways.
  • the first way when the received data packet meets the first predetermined condition, start to maintain the lifetime of the automatic retransmission request process corresponding to the first predetermined number.
  • the timer when a timer is used to maintain the lifetime of the automatic retransmission request process, the timer can be started or counted down; when a counter is used to maintain the lifetime of the automatic retransmission request process, the counter can be started to count or Count down.
  • the timer when a timer is used to maintain the lifetime of the automatic retransmission request process, the timer can be continued or counted down, or based on the regained lifetime; when a counter is used to maintain the automatic retransmission request process During the lifetime, the counter can continue to count or count down, or count or count down according to the regained lifetime.
  • the first predetermined condition includes: the received data packet is a newly transmitted data packet; or, the first predetermined number of the received data packet corresponds to the currently maintained automatic retransmission request process The first booking number is different.
  • the second predetermined condition includes: the received data packet is a retransmission data packet; or, there is a corresponding first predetermined number and the data packet in the currently maintained automatic retransmission request process The automatic retransmission request process with the same first predetermined number.
  • the first receiver 1002 may use any one of the following methods to determine whether the received data packet is a newly transmitted data packet or a retransmitted data packet.
  • the first way judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet.
  • the new transmission instruction information indicates a new transmission data packet
  • the received data packet is determined Retransmit the data packet.
  • the second method determine whether the process number carried in the data packet is the same as the process number corresponding to the created or configured automatic retransmission request process. In some embodiments, when the process number carried in the data packet and the process number corresponding to the created or configured automatic retransmission request process are not the same, it is determined that the received data packet is a newly transmitted data packet; when the created or When there is an automatic retransmission request process with the same process number as the process number carried in the data packet in the configured automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • the third method determine whether the packet sequence number carried in the data packet is the same as the packet sequence number corresponding to the created or configured automatic retransmission request process. In some embodiments, when the packet sequence number carried in the data packet is different from the packet sequence number corresponding to the created or configured automatic retransmission request process, it is determined that the received data packet is a newly transmitted data packet; when the created or When there is an automatic retransmission request process with the same packet sequence number as the packet sequence number carried in the data packet in the configured automatic retransmission request process, it is determined that the received data packet is a retransmission data packet.
  • the first receiver 1002 may obtain the lifetime in any of the following ways.
  • the first way Obtained according to the mapping relationship between the lifetime and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the second way Obtained according to the mapping relationship between the end time or the remaining time length or the remaining times of the life cycle and the second predetermined number of the data packet and the second predetermined number carried in the data packet.
  • the third way obtained according to the lifetime carried in the data packet.
  • the fourth way according to the life of the notification.
  • the fifth way according to the negotiated life cycle.
  • the sixth way according to the preset life period.
  • the second predetermined number may be a redundant version number.
  • the data packet when it is determined that the data packet is received incorrectly, and the received data packet is a newly transmitted data packet, and the first predetermined number carried in the data packet cannot be obtained; or, the data is determined When the packet is received incorrectly, and the received data packet is a retransmission data packet, and the first predetermined number carried by the data packet cannot be obtained, the data packet is discarded.
  • the first receiver 1002 is further configured to: when the life of the automatic retransmission request process expires, remove or end the automatic retransmission request process.
  • the automatic retransmission request process corresponding to the first data packet or the second data packet is removed or ended, so that the automatic retransmission request process is removed in time,
  • a new automatic retransmission request process can be created in time for new transmission data packets, thereby improving transmission efficiency.
  • another embodiment of the present invention provides a transmission system, including: a second sender 1101 and a second receiver 1102.
  • the second sender 1101 is used to create an automatic retransmission request process for the first data packet; set the life period of the automatic retransmission request process; and send the first data packet.
  • the second receiver 1102 is used to receive the data packet; when it is determined that the data packet is received incorrectly, the lifetime of the first automatic retransmission cache block corresponding to the data packet is maintained.
  • the specific implementation process of the second sender 1101 is the same as the specific implementation process of the first sender 1001 in the foregoing embodiment, and details are not described herein again.
  • the second recipient 1102 is further configured to: cache the received data packet in the first automatic retransmission buffer block, or, cache the received data packet and the first automatic retransmission buffer The buffered data packets in the block are merged, and the merged data packets are cached in the first automatic retransmission cache block.
  • the second receiver 1102 when it is judged that the data packet is received incorrectly, can reply to receive the incorrect confirmation frame; or do not reply any information; when it is judged that the data packet is received correctly, reply to receive the correct confirmation frame .
  • the second recipient 1102 is specifically configured to implement the maintenance period of the first automatic retransmission cache block corresponding to the data packet in at least one of the following ways.
  • the first way when the data packet meets the third predetermined condition, start to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet.
  • the second way when the data packet meets the fourth predetermined condition, continue to maintain the lifetime of the first automatic retransmission cache block corresponding to the data packet.
  • the method further includes: configuring the life cycle of the first automatic retransmission cache block for the data packet.
  • the third predetermined condition includes: the new transmission indication information carried in the data packet indicates a new transmission data packet; or, the third predetermined number carried in the data packet and all the automatic retransmission buffer areas The third predetermined number carried by the data packet buffered in the retransmission buffer block is different.
  • the third predetermined number carried in the data packet is different from the third predetermined number carried in the data packet cached in the automatic retransmission cache block in the automatic retransmission buffer area.
  • the received data packet is a newly transmitted data packet.
  • the received data packet is a retransmission data packet, but the lifetime of the automatic retransmission cache block previously maintained by the data packet has ended, that is, the automatic retransmission cache block has been emptied or overwritten.
  • the fourth predetermined condition includes: the new transmission indication information carried in the data packet indicates that the data packet is retransmitted; or there is a second automatic retransmission cache block in the automatic retransmission buffer area.
  • the third predetermined number carried by the data packet buffered by the second automatic retransmission buffer block is the same as the third predetermined number carried by the received data packet.
  • the third predetermined number includes: a packet sequence number or a site identifier that sends the data packet.
  • the station identification includes any one of an association identification, a partial association identification, and a media access control (MAC, Media Access Control) address.
  • MAC Media Access Control
  • part of the association identifier may be a part of the association identifier, or calculated according to the association identifier.
  • the lifetime of the automatic retransmission cache block may be maintained in a timing or countdown manner.
  • the second recipient 1102 may use any of the following methods to determine whether the received data packet is a newly transmitted data packet or a retransmitted data packet.
  • the first way judging whether the received data packet is a newly transmitted data packet or a retransmitted data packet according to the new transmission instruction information carried in the received data packet.
  • the new transmission instruction information indicates a new transmission data packet
  • the received data packet is determined Retransmit the data packet.
  • the second method determine whether the third predetermined number carried in the data packet is the same as the third predetermined number carried in the data packet buffered in the automatic retransmission buffer block. In some embodiments, when the third predetermined number carried by the data packet is not the same as the third predetermined number carried by the data packet cached in the automatic retransmission buffer block, it is determined that the received data packet is a newly transmitted data packet; When the second automatic retransmission buffer block exists in the automatic retransmission buffer area, it is determined that the received data packet is a retransmission data packet.
  • the second recipient 1102 is further configured to: when the lifetime of the first automatic retransmission cache block corresponding to the data packet expires, empty or re-override the first corresponding to the data packet One automatically retransmits the cache block.
  • the automatic retransmission cache block when the lifetime of the automatic retransmission cache block expires, the automatic retransmission cache block is emptied or re-covered, so that the automatic retransmission cache block is released in time. Under the premise that the number of automatic retransmission cache blocks is limited, the Cache new data packets in time, thereby improving transmission efficiency.
  • the term computer storage medium includes both volatile and nonvolatile implemented in any method or technology for storing information such as computer readable instructions, data structures, program modules, or other data Sex, removable and non-removable media.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium for storing desired information and accessible by a computer.
  • the communication medium generally contains computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium .

Abstract

本发明实施例公开了一种传输方法、装置、系统及计算机可读存储介质，所述传输方法包括：创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。本发明实施例通过设置自动重传请求进程的生命期，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。

Description

传输方法、装置、系统及计算机可读存储介质 技术领域
本发明实施例涉及一种传输方法、装置、系统及计算机可读存储介质。
背景技术
随着无线网络的技术的发展，在不断的提高网络性能的同时，对传输的可靠性的要求也在不断提高，并支持边缘用户。
对于工作在免授权频段的无线网络，需要遵循先听后说(LBT，listen before talk)的原则，即设备在接入前需要先监听信道，如果监听到当前有其他设备正在传输，则需要延迟接入传播媒介。
以工作在免授权频段的无线局域网为例，无线局域网中，常见设备为接入点(AP，Access Point)站点(STA，Station)以及非接入站点(non-AP STA)。AP建立一个基本服务集(BSS，Basic Service Set)，non-AP STA通过扫描认证关联过程与AP关联，并与AP通信或通过AP与其他STA通信。在另一种无线局域网中，例如独立BSS(IBSS，Independent BSS)中，不存在类似AP的接入点站点，所有站点可以直接和彼此进行通信。无论是哪一种无线局域网，站点都需要通过竞争信道的方式接入传播媒介。此外，目前无线局域网中采用的包确认机制大致包括：发送方发送数据包，数据包中携带有响应策略，响应策略用于指示是否需要接收方回复正确确认帧。当指示为需要回复正确确认帧时，在指示为需要接收方回复正确确认帧的情况下，接收方接收到所述数据包，当判断接收不正确时不回复任何响应，并丢弃该数据包；由于被丢弃的数据包中仍然包含有效信息，为了利用这些有效信息，无线局域网引入了自动重传请求机制，即接收方在判断接收数据包不正确时，会缓存该数据包并用于合并处理，而发送方则会重传该数据包或该数据包的不同冗余版本。
对于工作在免授权频段的无线网络，在执行自动重传请求机制的过程 中，发送方每次重传数据包或该数据包的不同冗余版本时都需要先监听信道，受接入时间点的不确定性等多种因素的影响，会导致该数据包所在的自动重传请求进程时间过长的占据相应的管理和存储资源，又由于设备能力限制，设备同时支持的最大自动重传请求进程数目有限，如果资源得不到及时的释放，将会导致新的自动重传请求进程无法创建，从而降低传输效率。
发明内容
本发明实施例提供了一种传输方法、装置、系统及计算机可读存储。
第一方面，本发明实施例提供了一种传输方法，包括：
创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
第二方面，本发明实施例提出了一种传输方法，包括：
接收到数据包；
当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
第三方面，本发明实施例提出了一种传输装置，包括：
创建模块，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
第四方面，本发明实施例提出了一种传输装置，包括：
第一接收模块，用于接收到数据包；
第一维护模块，用于当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
第五方面，本发明实施例提出了一种传输装置，包括：
第二接收模块，用于接收到数据包；
第二维护模块，用于当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
第六方面，本发明实施例提出了一种传输装置，包括处理器和计算机可 读存储介质，所述计算机可读存储介质中存储有指令，当所述指令被所述处理器执行时，实现上述任一种传输方法。
第七方面，本发明实施例提出了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述任一种传输方法的步骤。
第八方面，本发明实施例提出了一种传输系统，包括：
第一发送方，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包；
第一接收方，用于接收到数据包；当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
第九方面，本发明实施例提出了一种传输系统，包括：
第二发送方，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包；
第二接收方，用于接收到数据包；当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
附图说明
附图用来提供对本发明实施例技术方案的进一步理解，并且构成说明书的一部分，与本发明实施例的实施例一起用于解释本发明实施例的技术方案，并不构成对本发明实施例技术方案的限制。
图1为本发明一个实施例提出的传输方法的流程图。
图2为本发明另一个实施例提出的传输方法的流程图。
图3为本发明实施例自动重传缓存区的示意图。
图4为本发明另一个实施例提出的传输方法的流程图。
图5为本发明实施例帧交互示意图一。
图6为本发明实施例帧交互示意图二。
图7为本发明另一个实施例提出的传输装置的结构组成示意图。
图8为本发明另一个实施例提出的传输装置的结构组成示意图。
图9为本发明另一个实施例提出的传输装置的结构组成示意图。
图10为本发明另一个实施例提出的传输系统的结构组成示意图。
图11为本发明另一个实施例提出的传输系统的结构组成示意图。
具体实施方式
下文中将结合附图对本发明实施例进行详细说明。需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互任意组合。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
参见图1，本发明一个实施例提出了一种传输方法，包括如下步骤100。
步骤100、创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
在本发明实施例中，可以在发送第一数据包前创建第一数据包的自动重传请求进程，或者在发送第一数据包时创建第一数据包的自动重传请求进程，或者在发送第一数据包后创建第一数据包的自动重传请求进程。也就是说，发送第一数据包的时间和创建第一数据包的自动重传请求进程的时间之差的绝对值在预定时间阈值内即可。
在本发明实施例中，第一数据包可以是新传数据包，也可以是重传数据包，本发明实施例对此不作限定。
在本发明另一个实施例中，还包括如下步骤101。
步骤101、开始维护所述自动重传请求进程的生命期。
在本发明实施例中，可以通过计时器或计数器维护自动重传请求进程的生命期。
在本发明的一些实施例中，生命期包括以下至少之一：时间长度、生命期的终点时刻、次数。
在本发明的一些实施例中，时间长度包括以下任意一个：有效时间长度、剩余时间长度。
在本发明的一些实施例中，次数包括以下任意一个：新传数据包，以及重传携带与新传数据包相同的第一预定号的数据包的总次数、新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
其中，有效时间长度是指：从自动重传请求进程被创建，或配置开始到自动重传请求进程被移除之间的时间间隔。
剩余时间长度是指：从当前时刻到自动重传请求进程被移除之间的时间间隔。
生命期的终点时刻是指自动重传请求进程被移除的时刻。
在本发明的一些实施例中，当生命期为有效时间长、或剩余时间长度时，可以通过计时器维护自动重传请求进程的生命期，具体可以采用计时或倒计时的方式。
当生命期为新传数据包以及重传数据包的总次数、或新传数据包以及重传数据包的剩余次数、或重传数据包的总次数、或重传数据包的剩余次数时，可以通过计数器维护自动重传请求进程的生命期，具体可以采用计数或倒计数的方式。
本发明实施例对开始维护自动重传请求进程的生命期的时刻不作限定，例如，可以在设置自动重传请求进程的生命期时开始维护自动重传请求进程的生命期。
在发明的一些实施例中，生命期采用以下任一种方式获得。
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预 定号获得。
第三种方式：根据通知的生命期获得。
第四种方式：根据协商的生命期获得。
第五种方式：根据预先设置的生命期获得。
在本发明的一些实施例中，第二预定号可以是冗余版本号。
在本发明另一个实施例中，该方法还包括如下步骤102。
步骤102、在自动重传请求进程的生命期内满足预设重传条件时，重传第二数据包；所述第一数据包和所述第二数据包携带有相同的第一预定号。
在本发明的一些实施例中，在判断自动重传请求进程的生命期内是否满足预设重传条件，以及重传第二数据包的过程中继续维护自动重传请求进程的生命期。
在本发明的一些实施例中，所述第一预定号包括以下至少之一：进程号、包序号。
在本发明实施例中，预设重传条件包括以下至少之一种预设重传条件。
1、接收到接收方回复的接收不正确确认帧。
2、通过竞争接入机制竞争到信道的时刻在所述自动重传请求进程的生命期内。
3、接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内。
4、第二预定时间间隔内未接收到接收方回复的确认帧，所述确认帧包括接收正确确认帧或接收不正确确认帧。
其中，当接收到接收方回复的接收不正确确认帧时，可以采用以下任一种方法重传第二数据包。
第一种方法：在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔(例如短帧帧间间隔(SIFS，Short InterFrame Space))后重传第二数据包。
该方法中，默认在接收到接收方回复的接收不正确确认帧后的第一预定 时间间隔内的所有时刻均在自动重传请求进程的生命期内，因此，认为第一预定时间间隔后生命期没有到期，可以在第一预定时间间隔后重传第二数据包。
第二种方法：在接收到接收方回复的接收不正确确认帧后，在生命期内，按照竞争接入机制竞争到信道时重传第二数据包。
第三种方法：当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻，均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，将自动重传请求进程的生命期延长到接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔后的第三预定时间间隔；其中，所述第三预定时间间隔至少为重传第二数据包所需要的时间；在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包。
第四种方法：当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，在自动重传请求进程的生命期到期时，移除自动重传请求进程，也就是说，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后不再重传第二数据包。
在本发明的一些实施例中，第一数据包或第二数据包中还携带生命期、生命期的终点时刻、剩余时间长度、剩余次数中的至少一者。
在本发明的一些实施例中，所述第二数据包与所述第一数据包相同，或所述第二数据包与所述第一数据包的冗余版本不同。
在本发明另一个实施例中，该方法还包括如下步骤103.
步骤103、在所述自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束自动重传请求进程。
在本发明另一个实施例中，当生命期为时间长度，且采用计时方式维护生命期时，生命期到期是指计时器计时达到生命期所指示的时间长度。
当生命期为终点时刻，且采用计时方式维护生命期时，生命期到期是指计时器计时达到终点时刻。
当生命期为次数，且采用计数方式维护生命期时，生命期到期是指计数器计数达到生命期所指示的次数。
当生命期为时间长度和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期所指示的时间长度；计数器计数达到生命期所指示的次数。
当生命期为终点时刻和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期的终点时刻；计数器计数达到生命期所指示的次数。
当采用倒计时方式维护生命期时，生命期到期是指计时器计时为0。
当采用倒计数方式维护生命期时，生命期到期是指计数器计数为0。
当采用倒计时和倒计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时为0；计数器计数为0。
在本发明的一些实施例中，移除或结束自动重传请求进程包括以下至少之一状态。
第一种状态：停止发送所述第一数据包或重传第二数据包。
第二种状态：停止发送携带有所述第一预定号的数据包。
第三种状态：停止使用自动重传请求机制发送第一数据包或重传第二数据包。
本发明实施例在自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
参见图2，本发明另一个实施例提出了一种传输方法，包括如下步骤200-步骤201。
步骤200、接收到数据包。
步骤201、当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
在本发明一些实施例中，第一预定号包括以下至少之一：进程号、包序号。
在本发明一些实施例中，当判断出数据包接收不正确时，可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明一些实施例中，维护第一预定号对应的自动重传请求进程的生命期包括以下至少一种。
第一种：当接收到的数据包满足第一预定条件时，开始维护所述第一预定号对应的自动重传请求进程的生命期；具体的，当采用计时器维护自动重传请求进程的生命期时，可以使计时器开始计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器开始计数或倒计数。
第二种：当接收到的数据包满足第二预定条件时，继续维护与所述数据包的第一预定号相同的自动重传请求进程的生命期。具体的，当采用计时器维护自动重传请求进程的生命期时，可以使计时器继续计时或倒计时，或根据重新获得的生命期计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器继续计数或倒计数，或根据重新获得的生命期计数或倒计数。
在本发明的一些实施例中，第一预定条件包括：接收到的数据包为新传的数据包；或接收到的数据包的第一预定号与当前维护的自动重传请求进程对应的第一预定号均不相同。
在本发明的一些实施例找那个，第二预定条件包括：接收到的数据包为重传数据包；或当前维护的自动重传请求进程中存在对应的第一预定号与所述数据包的第一预定号相同的自动重传请求进程。
在发明的一写实施例中，判断接收到的数据包为新传的数据包还是重传的数据包包括以下任意一种。第一种：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传数据包还是重传数据包；在一实施例中，当新传指示信息指示为新传数据包时，确定接收到的数据包为新传数据包；当新传指示信息指示为重传数据包时，确定接收到的数据包为重传数据包。
第二种：判断数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号是否相同；在一些实施例中，当数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在进程号与数据包中携带的进程号相同的自动重传请求进程时，确定接收到的数据包为重传数据包。
第三种：判断数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号是否相同；在一些实施例中，当数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在包序号与数据包中携带的包序号相同的自动重传请求进程时，确定接收到的数据包为重传数据包。
在本发明一些实施例中，可以通过计时器或计数器维护自动重传请求进程的生命期。
在本发明一些实施例中，生命期包括以下至少之一：时间长度、生命期的终点时刻、次数。
在本发明一些实施例中，所述时间长度包括以下任意一个：有效时间长度、剩余时间长度。
在本发明一些实施例中，次数包括以下任意一个：新传数据包以及重传携带有与新传数据包相同的第一预定号的数据包的总次数、新传的数据包以及重传携带有与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
其中，有效时间长度是指从自动重传请求进程被创建或配置开始到自动 重传请求进程被移除之间的时间间隔。
剩余时间长度是指从当前时刻到自动重传请求进程被移除之间的时间间隔。
生命期的终点时刻是指自动重传请求进程被移除的时刻。
在本发明一些实施例中，当生命期为有效时间长、或剩余时间长度时，可以通过计时器维护自动重传请求进程的生命期，具体可以采用计时或倒计时的方式，即为为接收到的数据包创建或配置自动重传请求进程后启动计时器开始计时或倒计时。
当生命期为新传数据包以及重传数据包的总次数、或新传数据包以及重传数据包的剩余次数、或重传数据包的总次数、或重传数据包的剩余次数时，可以通过计数器维护自动重传请求进程的生命期，具体可以采用计数或倒计数的方式，即为接收到的数据包创建或配置自动重传请求进程后启动计数器开始计数或倒计数。
在本发明实施例中，生命期采用以下任一种方式获得。
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第三种方式：根据所述数据包中携带的生命期获得。
第四种方式：根据通知的生命期获得。
第五种方式：根据协商的生命期获得。
第六种方式：根据预先设置的生命期获得。
在本发明一些实施例中，第二预定号可以是冗余版本号。
在本发明另一个实施例中，当判断出数据包接收不正确，且接收到的数据包为新传数据包，且无法获得所述数据包所携带的第一预定号；或者，判断出数据包接收不正确，且接收到的数据包为重传数据包，且无法获得所述 数据包所携带的第一预定号时，丢弃该数据包。
在本发明另一个实施例中，该方法还包括如下步骤202。
步骤202、在自动重传请求进程的生命期到期时，移除或结束自动重传请求进程。
在本发明另一个实施例中，当生命期为时间长度，且采用计时方式维护生命期时，生命期到期是指计时器计时达到生命期所指示的时间长度。
当生命期为终点时刻，且采用计时方式维护生命期时，生命期到期是指计时器计时达到终点时刻。
当生命期为次数，且采用计数方式维护生命期时，生命期到期是指计数器计数达到生命期所指示的次数。
当生命期为时间长度和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期所指示的时间长度；计数器计数达到生命期所指示的次数。
当生命期为终点时刻和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期的终点时刻；计数器计数达到生命期所指示的次数。
当采用倒计时方式维护生命期时，生命期到期是指计时器计时为0。
当采用倒计数方式维护生命期时，生命期到期是指计数器计数为0。
当采用倒计时和倒计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时为0；计数器计数为0。
本发明实施例在自动重传请求进程的生命期到期时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
参见图4，本发明另一个实施例提出了一种传输方法，包括如下步骤400-步骤401。
步骤400、接收到数据包。
步骤401、当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
在本发明另一个实施例中，还可以将接收到的数据包缓存到第一自动重传缓存块中，或者，将接收到的数据包和第一自动重传缓存块中已缓存的数据包进行合并处理，将合并处理后的数据包缓存到第一自动重传缓存块中。
在本发明一些实施例中，当判断出数据包接收不正确时，可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明一些实施例中，维护数据包对应的第一自动重传缓存块的生命期包括以下至少之一。
在所述数据包满足第三预定条件时，开始维护所述数据包对应的第一自动重传缓存块的生命期。
在所述数据包满足第四预定条件时，继续维护所述数据包对应的第一自动重传缓存块的生命期。
在所述数据包满足所述第三预设条件时，该方法还包括：为所述数据包配置第一自动重传缓存块的生命期。
在本发明一些实施例中，第三预定条件包括以下任一个。
一、数据包中携带的新传指示信息指示为新传数据包；
二、数据包所携带的第三预定号，与自动重传缓存区中的所有自动重传缓存块中缓存的数据包携带的第三预定号均不相同。
在本发明实施例中，数据包所携带的第三预定号与自动重传缓存区中的自动重传缓存块中缓存的数据包携带的第三预定号均不相同有以下两种可能的情况。
一、接收到的数据包为新传数据包。
二、接收到的数据包为重传数据包，但是该数据包之前维护的自动重传缓存块的生命期已经结束，即自动重传缓存块已被清空或重新覆盖。
在本发明一些实施例中，第四预定条件包括以下任一个。
一、数据包中携带的新传指示信息指示为重传数据包。
二、自动重传缓存区中存在第二自动重传缓存块。
在本发明的一些实施例，第二自动重传缓存块缓存的数据包携带的第三预定号与接收到的数据包携带的第三预定号相同。
在本发明的一些实施例中，所述第三预定号包括以下任意一个：包序号、发送所述数据包的站点标识。
在本发明的一些实施例中，站点标识包括以下任意一个：关联标识、部分的关联标识、媒体访问控制(MAC，Media Access Control)地址。
在本发明的一些实施例中，部分的关联标识可以是关联标识的一部分，或者根据关联标识计算得到的。
在本发明的一些实施例中，可以采用计时或倒计时的方式维护自动重传缓存块的生命期。
在本发明的一些实施例中，可以采用以下任一种方式判断接收到的数据包为新传数据包还是重传数据包。
第一种方式：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传数据包还是重传数据包。在一些实施例中，当新传指示信息指示为新传数据包时，确定接收到的数据包为新传数据包；当新传指示信息指示为重传数据包时，确定接收到的数据包为重传数据包。
第二种方式：判断数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号是否相同。在一些实施例中，当数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号均不相同时，确定接收到的数据包为新传数据包；当自动重传缓存区中存在第二自动重传缓存块时，确定接收到的数据包为重传数据包。
在本发明另一个实施例中，该方法还包括如下步骤402。
步骤402、在所述数据包对应的第一自动重传缓存块的生命期到期时，清空或重新覆盖所述数据包对应的第一自动重传缓存块。
本发明实施例在自动重传缓存块的生命期到期时，清空或重新覆盖自动重传缓存块，使得自动重传缓存块得到及时释放，在自动重传缓存块数量有限的前提下，可以及时缓存新的数据包，从而提高了传输效率。
实施例1
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，，生命期可以是有效时间长度T，即从自动重传请求进程被创建或配置的时间到自动重传请求进程被移除的时间之间的时间间隔，T可以是由接入点站点通知的值，或是非接入站点与接入点站点协商的值，或者是由非接入站点自己决定的值，或者是系统预定义的值。
站点在维护生命期时可以采取计时或倒计时的方式。
在本实施例中，以站点采取计时的方式为例，该传输方法包括如下步骤。
发送方STA1发送新传数据包1时，STA1为该数据包1创建或配置一个自动重传请求进程，该自动重传请求进程对应的计时器t2开始计时。
在t2计时到T之前，STA1在收到来自数据包1的接收方所回复的接收不正确确认帧时，采用以下任一种方式重传数据包1或重传与数据包1的冗余版本不同的数据包2。
第一种、通过竞争接入机制竞争到信道时重传该数据包1或者重传与数据包1的冗余版本不同的数据包2。
第二种、在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传该数据包1或者重传与数据包1的冗余版本不同的数据包2。
该方法中，默认在接收到数据包1的接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内，因此，认为第一预定时间间隔后生命期没有到期，可以在第一预定时间间隔后重传数据包1或重传与数据包1的冗余版本不同的数据包2。
第三种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复 的接收不正确确认帧后的第一预定时间间隔后重传数据包1或与数据包1的冗余版本不同的数据包2；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，将自动重传请求进程的生命期延长到接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔后的第三预定时间间隔；其中，所述第三预定时间间隔至少为重传数据包1或与数据包1的冗余版本不同的数据包2所需要的时间；在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传数据包1或与数据包1的冗余版本不同的数据包2。
上述第二种和第三种方法中，帧交互过程示意图如图5所示。
第四种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在第一预定时间间隔后重传数据包1或与数据包1的冗余版本不同的数据包2；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，在自动重传请求进程的生命期到期时，移除自动重传请求进程，也就是说，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后不再重传数据包1或与数据包1的冗余版本不同的数据包2。
上述方法中，每一次重传的数据包的冗余版本可以相同，也可以不同。
STA1在以下情况之一下，停止重传数据包1或与数据包1的冗余版本不同的数据包2。
a.在t2计时到T时。
b.接收到接收方回复的接收正确确认帧时。
例如，STA1为每个自动重传请求进程维护的生命期为100ms，STA1向STA2新传输一个数据包1，STA1为数据包1配置自动重传请求进程1，同时自动重传请求进程1对应的计时器t2开始计时t2＝0，STA1接收到来自STA2的接收不正确确认帧时，SIFS间隔后传输数据包1的冗余版本1，在再次接收到STA2的接收不正确确认帧的SIFS间隔后传输数据包1的冗余版本2，如此，直到发生以下情况之一时，停止发送数据包1或与数据包1的冗余版本不同的数据包2。
a.t2计时达到100ms。
b.接收到接收方回复的接收正确确认帧。
实施例2
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，，生命期可以是有效时间长度T，T可以是由接入点站点通知的值，或是非接入站点与接入点站点协商的值，或者是由非接入站点自己决定的值，或者是系统预定义的值。
站点在维护生命期时可以采取计时或倒计时的方式。
在本实施例中，以站点采取计时的方式为例，该传输方法包括如下步骤。
发送方STA1有发送新传数据包1时，STA1为该数据包1创建或配置一个自动重传请求进程，该自动重传请求进程对应的计时器t2开始计时。
在t2计时到T之前，STA1在第二预定时间间隔内没收到来自数据包1的接收方所回复的接收正确确认帧时，重传该数据包1或者是重传与数据包1的冗余版本不同的数据包2；如果仍未计时到T，在第二预定时间间隔内没接收到所述接收方的接收正确确认帧时，重传该数据包1或者是重传与数据包1的冗余版本不同的数据包2，并在T时刻到达之前重复上述过程。帧交互示意图如图6所示。
STA1在以下情况下，停止重传所述数据包1以及与数据包1的冗余版本不同的数据包2。
c.在t2计时到T时。
d.接收到接收方回复的接收正确确认帧时。
实施例3
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，生命期可以是有效时间长度T，T可以是由接入点站点通知的值，或是非接入站点与接入点站点协商的值，或者是由非接入站点自己决定的值，或者是系统预定义的值。
站点在维护生命期时可以采取计时或倒计时的方式。
在本实施例中，以站点采取计时的方式为例，该传输方法包括如下步骤。
接收方STA2接收到数据包，判断该数据包接收不正确，且该数据包为新传数据包，STA2还获得该数据包所携带的第一预定号，启动该第一预定号所对应自动重传请求进程的计时器t3，当t3计时到T时，STA2移除或结束该自动重传请求进程。其中，第一预定号包括以下至少之一：进程号、包序号。
其中，STA2判断数据包是否为新传数据包方法包括但不限于以下之一。
1)通过数据包中携带有的新传指示信息判断是否为新传数据包；具体的，当数据包中携带有的新传指示信息指示数据包为新传数据包时，判断出数据包为新传数据包；当数据包中携带有的新传指示信息指示数据包为重传数据包时，判断出数据包为重传数据包；
2)根据数据包中携带的进程号与已创建或配置或正在维护的自动重传请求进程对应的进程号是否相同判断是否为新传数据包；具体的，当数据包中携带的进程号与已创建或配置或正在维护的自动重传请求进程对应的进程号相同时，判断出数据包为重传数据包；当数据包中携带的进程号与已创建或配置或正在维护的自动重传请求进程对应的进程号均不同时，判断出数据包为新传数据包。
3)根据数据包中携带的包序号与已创建或配置或正在维护的自动重传请求进程对应的包序号是否相同判断是否为新传数据包；具体的，当数据包中携带的包序号与已创建或配置或正在维护的自动重传请求进程对应的包序号相同时，判断出数据包为重传数据包；当数据包中携带的包序号与已创建或配置或正在维护的自动重传请求进程对应的包序号均不同时，判断出数据包为新传数据包。
实施例4
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，生命期与第二预定号成映射关系包括以下任意一种。
a)自动重传请求进程的生命期使用有效时间长度或剩余时间长度标识，所述生命期的剩余时间长度或自动重传请求进程的生命期的有效时间长度与第二预定号构成映射关系b)自动重传请求进程的生命期使用次数标识，所述生命期的总次数或剩余次数与第二预定号构成映射关系。
在一些示例中，接收方STA2接收到数据包，STA2获得了所述数据包的第二预定号，STA2根据预定义的第二预定号与自动重传请求进程的生命期的剩余时间长度或生命期的终点时刻之间的映射关系，可以由数据包的第二预定号获得自动重传请求进程的生命期的剩余时间长度或生命期的终点时刻，当所述剩余时间长度结束或者是到达生命期的终点时刻时，STA2移除或结束该自动重传请求进程。
在另一些示例中，接收方STA2接收到数据包，STA2获得了所述数据包的第二预定号，STA2根据预定义的第二预定号与自动重传请求进程的生命期的剩余次数之间的映射关系，可以由数据包的第二预定号获得自动重传请求进程的生命期的剩余次数，当所接收到的该数据包或与该数据包的冗余版本不同的数据包总次数达到所述剩余次数时，STA2移除或结束该自动重传请求进程。
例如，第二预定号与自动重传请求进程的生命期的映射关系如表1所示，STA2接收到一个数据包，STA2获得所述数据包的冗余版本号为n2，STA2根据预定义的第二预定号与自动重传请求进程的生命期的映射关系，获得自动重传请求进程的生命期的为V2，以所述生命期指示为剩余时长为例，则STA2从接收到该数据包时开始从0计时，在计时到V2时移除或结束该数据包对应的自动重传请求进程。
第二预定号 生命期
n1 V1
n2 V2
n3 V3
... ...
nk V4
表1：第二预定号与自动重传请求进程的生命期的映射关系表
实施例5
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，生命期可以是一个有效时间长度T。
在BSS内，发送方或接收方分别为每个自动重传请求进程维护一个计时器。
该传输方法包括如下步骤。
当STA1新传输一个数据包1时，为该数据包1创建或配置一个自动重传请求进程，并启动该自动重传请求进程对应的计时器t1，当t1计时到T时，移除所述数据包1对应的自动重传请求进程。
上述过程包括但不限于：在上述自动重传请求进程执行过程中，STA1在所述数据包1没有被正确接收时，会重传所述数据包1或者是与数据包1的冗余版本不同的数据包2。发送与数据包1的冗余版本不同的数据包2与所述数据包1的包序号相同，且带有相同的有效信息但冗余信息不同，其中，有效信息为编码前待传输的信息比特。
STA1在上述的自动重传请求进程中所发送数据包1或者是与数据包1的冗余版本不同的数据包2中还携带有时长信息，该时长信息用于指示当前数据包1或者与数据包1的冗余版本不同的数据包2对应的自动重传请求进程的生命期的剩余时间长度，或者是用于指示当前数据包1或者与数据包1的冗余版本不同的数据包2所对应的自动重传请求进程的生命期的终点时 刻。
接收方STA2在收到来自STA1上述数据包或者与数据包的冗余版本不同的数据包时即可以获取到所述剩余时间长度，在该剩余时间长度为零时，移除或结束所述自动重传请求进程。
或者是STA2在收到来自STA1上述数据包1或者与数据包1的冗余版本不同的数据包2时即可获取到所述自动重传请求进程的生命期的终点时刻，在该终点时刻到来时，移除或结束所述自动重传请求进程。
实施例6
BSS内站点可以同时支持一个或一个以上自动重传请求进程。
站点为每个自动重传请求进程维护一个生命期，不同自动重传请求进程的生命期可以相同或者不同。
在本发明的一些实施例中，生命期可以为新传数据包以及重传数据包的总次数。
在本发明的一些实施例中，所述数据包的重传包的包序号相同，且携带与所述数据包相同的有效信息，相同或不同的冗余信息，其中有效信息为编码前待传输的信息比特。
例如，STA1作为接收方为每个自动重传请求进程维护的生命期为N次，即STA1接收某数据包以及该数据包的重传数据包的总次数为N次。
STA1接收到一数据包，判断所述数据包是否为新传数据包。
a)当判断为新传数据包时，STA1将数据包的第一预定号对应的自动重传请求进程对应的计数器开始计数。
b)当判断为非新传数据包时，STA1判断该数据包是否与当前某自动重传请求进程对应的进程号或包序号是否相同，当该数据包与当前某自动重传请求进程对应的进程号或包序号相同时，相应计数器加1；当该数据包与当前所有自动重传请求进程对应的进程号或包序号均不同时，STA1将数据包的第一预定号对应的自动重传请求进程对应的计数器开始计数。
在上述计数器计时到N时，STA1移除相应的自动重传请求进程。
其中，STA1判断数据包是否为新传数据包的方法包括但不限于以下之一：
1)通过数据包中携带有的新传指示信息判断是否为新传数据包；具体的，当新传指示信息指示为新传数据包时，确定数据包为新传数据包；当新传指示信息指示为重传数据包时，确定数据包为重传数据包。
2)判断数据包中携带的进程号或包序号与当前维护的自动重传请求进程对应的进程号或包序号是否相同。具体的，当数据包中携带的进程号(或包序号)与当前维护的自动重传请求进程对应的进程号(或包序号)均不相同时，确定数据包为新传数据包；当数据包中携带的进程号(或包序号)与当前维护的某个自动重传请求进程对应的进程号(或包序号)相同时，确定数据包为重传数据包。
实施例7
BSS内站点可以同时支持一个或一个以上自动重传请求进程。站点为每个自动重传请求进程维护一个生命期。不同自动重传请求进程的生命期可以相同或者不同。
生命期可以为数据包以及该数据包的重传数据包的剩余传输次数。
在本发明的一些实施例中，所述数据包的重传包携带与所述数据包相同的有效信息，相同或不同的冗余信息。其中有效信息为编码前待传输的信息比特。
例如，发送方STA1在发送的数据包中携带有生命期，所述生命期指示当前数据包以及该数据包的重传数据包的剩余次数。具体的，STA1在新传输的数据包中携带有生命期指示所述剩余次数为N，在第二次传输相同包序号的数据包或者数据包的重传数据包中携带有生命期指示所述剩余传输次数为N-1，如此类推，STA2可以在所发送的相同包序号的全部或部分数据包或者数据包的重传包中携带有生命期。
接收方STA2接收到上述数据包中的一个或一个以上，即可以获取当前数据包所在自动重传请求进程的生命期。
实施例8
在无线网络中，有多个站点(STA)，组成一个基础服务集(BSS，Basic Service Set)。
站点作为接收方时，其总缓存区中包含自动重传请求缓存区，其中自动重传请求缓存区又划分为一个或一个以上自动重传缓存块。站点为每个自动重传缓存块维护一个计时器。自动重传请求缓存区示意图如图3所示。
站点将相同包序号的数据包存放在同一个自动重传缓存块中，并从放入某一个自动重传缓存块中包含某包序号的第一个数据包开始计时，站点支持缓存相同包序号的数据包的最长持续时长为T，其中T为所述自动重传缓存块缓存某包序号对应数据包的生命周期。当T结束时，站点清空或重新覆盖该自动重传缓存块，并重置该自动重传缓存块对应的计时器。
例如，STA1接收数据包，在判断该数据包接收不正确，并获取到该数据包的包序号为M。
a.当判断当前数据包为新传数据包时，为缓存该数据包配置某自动重传缓存块，该自动重传缓存块记为B1，B1所对应的的计时器t1开始计时。
b.当判断当前数据包为非新传数据包时，将该数据包缓存至具有相同包序号M的数据包所对应的自动重传缓存块(此处记为B2)中；或者是将该数据包与B2中缓存的数据包进行合并处理，并将合并处理后的数据包缓存至B2中，B2对应有计时器t2。
在本发明的一些实施例中，STA1可以但不限于根据自动重传请求缓存区中是否存在缓存与当前数据包具有相同包序号的数据包的自动重传缓存块来判断是当前数据包是否为新传数据包：当自动重传请求缓存区中没有缓存包序号为M的数据包的自动重传缓存块时，则当前传输为新传数据包；当自动重传请求缓存区中存在缓存有包序号为M的数据包的自动重传缓存块时，则当前传输为非新传数据包。
当计时器计时到T时，STA1清空自动重传请求缓存区中相应的自动重传缓存块，并重置计时器。在上述示例中，当t1计时到T时，STA1清空B1，并重置t1；当t2计时到T时，STA1清空B2，并重置t2。
STA1在接收数据包不正确时，如果未获取到该数据包的包序号为M， 则STA1丢弃该数据包。
实施例9
STA1在数据包接收正确，并获取到该数据包的包序号为N时。
a)当判断该数据包为新传数据包时，即自动重传请求缓存区中没有缓存包序号为N的数据包时，对STA1的自动重传请求缓存区不做任何操作。
b)当判断该数据包为非新传数据包时，即自动重传请求缓存区中缓存有包序号为N的数据包时，此处将自动重传请求缓存区中缓存有包序号为N的数据包的自动重传缓存块标记为B3，则STA1清空B3，并重置B3所对应的计时器。
实施例10
BSS内站点作为接收方时，其总缓存区中包含自动重传请求缓存区，其中自动重传请求缓存区又划分为一个或多个自动重传缓存块，站点为每个自动重传缓存块维护一个计时器。
站点将来自相同发送方的数据包放在同一缓存块中，其中发送方由携带在数据包中的关联标识、或部分的关联标识或媒体访问控制(MAC，Media Access Control)地址等标识，此处统一称为站点标识(SID，STA Identifier)。
站点从放入某一个缓存块中包含某SID的第一个数据包开始计时，站点支持缓存相同SID的数据包的最长持续时长为T，其中T为自动重传缓存块缓存某SID对应数据包的生命周期。当T结束时，站点清空或重新覆盖该自动重传缓存块，并重置该自动重传缓存块对应的计时器。
例如：STA1同时接收到来自多个站点的多个数据包，这多个站点的SID分别为k1，k2，...kn；STA1分别判断各个数据包是否接收正确，对于接收不正确的数据包，将数据包缓存到发送数据包的站点的SID对应的自动重传缓存块中。
例如，STA1接收到来自站点标识为k1的站点的数据包，并判断接收不正确。
a)如果当前自动重传请求缓存区中没有缓存任何来自站点标识为k1的站点的数据包，则STA1将当前接收到的数据包缓存至某自动重传缓存块Bi 中，且Bi对应的计时器t1开始计时。
b)如果当前自动重传请求缓存区中某自动重传缓存块Bk中已经缓存有站点标识为k1的站点的数据包，且Bk对应的计时器t2没有计时到T，则STA1将当前所接收到的数据包缓存在Bk中。
当上述计时器计时到T时，STA1清空或重新覆盖自动重传请求缓存区中相应的自动重传缓存块，并重置计时器。
例如，当上述t1计时到T时，STA1清空Bi，并重置t1。
实施例11
站点为每个自动重传请求进程维护一个生命期。不同自动重传请求进程的生命期可以相同或者不同。
所述生命期由时长信息和传输次数联合指示。即在满足以下条件之一时，移除或结束所述自动重传请求进程。
1、在计时达到时长信息所指示或计算得到的生命期终点时刻处。
2、在计数达到传输次数所指示或计算得到的生命期终止时刻处；
例如，发送方发送数据包或发送该数据包不同的冗余版本中携带有生命期信息，该信息包括当前自动重传请求进程的剩余时长T，以及当前自动重传请求进程的剩余传输次数N。
接收方接收到上述数据包，获得T和N，并分别计数和计时，当计数或计时任意一个到期时，移除所述自动重传请求进程。例如，当倒数计数到0而倒数计时未到0时，移除所述自动重传请求进程；或者是当倒数计时到0而倒数计数未到0时，移除所述自动重传请求进程。
参见图7，本发明另一个实施例提出了一种传输装置，包括创建模块701。
创建模块701用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
在本发明的一些实施例中，创建模块701可以在发送第一数据包前创建第一数据包的自动重传请求进程，或者在发送第一数据包时创建第一数据包的自动重传请求进程，或者在发送第一数据包后创建第一数据包的自动重传 请求进程。也就是说，发送第一数据包的时间和创建第一数据包的自动重传请求进程的时间之差的绝对值在预定时间阈值内即可。
在本发明的一些实施例中，第一数据包可以是新传数据包，也可以是重传数据包，本发明实施例对此不作限定。
在本发明的一些实施例中，创建模块701还用于：开始维护所述自动重传请求进程的生命期。
在本发明的一些实施例中，创建模块701可以通过计时器或计数器维护自动重传请求进程的生命期。
在本发明的一些实施例中，生命期包括以下至少之一：时间长度、生命期的终点时刻、次数。
在本发明的一些实施例中，时间长度包括以下任意一个：有效时间长度、剩余时间长度。
在本发明的一些实施例中，次数包括以下任意一个：新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的总次数、新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
其中，有效时间长度是指从自动重传请求进程被创建或配置开始到自动重传请求进程被移除之间的时间间隔。
剩余时间长度是指从当前时刻到自动重传请求进程被移除之间的时间间隔。
生命期的终点时刻是指自动重传请求进程被移除的时刻。
在本发明的一些实施例中，当生命期为有效时间长、或剩余时间长度时，可以通过计时器维护自动重传请求进程的生命期，具体可以采用计时或倒计时的方式。
当生命期为新传数据包以及重传数据包的总次数、或新传数据包以及重传数据包的剩余次数、或重传数据包的总次数、或重传数据包的剩余次数时，可以通过计数器维护自动重传请求进程的生命期，具体可以采用计数或倒计数的方式。
本发明实施例对创建模块701开始维护自动重传请求进程的生命期的时刻不作限定，例如，可以在设置自动重传请求进程的生命期时开始维护自动重传请求进程的生命期。
在本发明另一个实施例中，还包括重传模块702。
重传模块702用于在自动重传请求进程的生命期内满足预设重传条件时，重传第二数据包；所述第一数据包和所述第二数据包携带有相同的第一预定号。
在本发明实施例中，创建模块701在重传模块702判断自动重传请求进程的生命期内是否满足预设重传条件，以及重传第二数据包的过程中继续维护自动重传请求进程的生命期。
在本发明的一些实施例中，所述第一预定号包括以下至少之一：进程号、包序号。
在本发明实施例中，创建模块701、重传模块702和第一移除模块703可以采用以下任一种方式获得生命期。
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包的第二预定号获得。
第三种方式：根据通知的生命期获得。
第四种方式：根据协商的生命期获得。
第五种方式：根据预先设置的生命期获得。
在本发明的是一些实施例中，第二预定号可以是冗余版本号。
在本发明实施例中，预设重传条件包括以下至少之一。
1、接收到接收方回复的接收不正确确认帧。
2、通过竞争接入机制竞争到信道的时刻在所述自动重传请求进程的生命期内。
3、接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内。
4、第二预定时间间隔内未接收到接收方回复的确认帧，所述确认帧包括接收正确确认帧或接收不正确确认帧。
在本发明的一些实施例中，当接收到接收方回复的接收不正确确认帧时，重传模块702可以采用以下任一种方法重传第二数据包。
第一种、在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔(例如短帧帧间间隔(SIFS，Short InterFrame Space))后重传第二数据包。
该方法中，默认在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内，因此，认为第一预定时间间隔后生命期没有到期，可以在第一预定时间间隔后重传第二数据包。
第二种、在接收到接收方回复的接收不正确确认帧后，在生命期内，按照竞争接入机制竞争到信道时重传第二数据包。
第三种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，将自动重传请求进程的生命期延长到接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔后的第三预定时间间隔；其中，所述第三预定时间间隔至少为重传第二数据包所需要的时间；在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包。
第四种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，在自动重传请求进程的生命期到期时，移除自动重传请求进程，也就是说，在接收到接收方回复的接收不 正确确认帧后的第一预定时间间隔后不再重传第二数据包。
在本发明的一些实施例中，第一数据包或第二数据包中还携带生命期、生命期的终点时刻、剩余时间长度、剩余次数中的至少一者。
在本发明的一些实施例中，所述第二数据包与所述第一数据包相同，或所述第二数据包与所述第一数据包的冗余版本不同。
在本发明另一个实施例中，还包括：第一移除模块703。
第一移除模块703用于在所述自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束自动重传请求进程。
在本发明另一个实施例中，当生命期为时间长度，且采用计时方式维护生命期时，生命期到期是指计时器计时达到生命期所指示的时间长度。
当生命期为终点时刻，且采用计时方式维护生命期时，生命期到期是指计时器计时达到终点时刻。
当生命期为次数，且采用计数方式维护生命期时，生命期到期是指计数器计数达到生命期所指示的次数。
当生命期为时间长度和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期所指示的时间长度；计数器计数达到生命期所指示的次数。
当生命期为终点时刻和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期的终点时刻；计数器计数达到生命期所指示的次数。
当采用倒计时方式维护生命期时，生命期到期是指计时器计时为0；
当采用倒计数方式维护生命期时，生命期到期是指计数器计数为0；
当采用倒计时和倒计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时为0；计数器计数为0。
在本发明实施例中，第一移除模块703具体用于采用以下至少之一方式实现移除或结束所述自动重传请求进程。
1、停止发送所述第一数据包或重传第二数据包。
2、停止发送携带有所述第一预定号的数据包。
3、停止使用自动重传请求机制发送第一数据包或重传第二数据包。
本发明实施例在自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
参见图8，本发明另一个实施例提出了一种传输装置，包括：第一接收模块801和第一维护模块802。
第一接收模块801用于接收到数据包；
第一维护模块802用于当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
在本发明另一个实施例中，传输装置还包括：第二移除模块803。
第二移除模块803用于在自动重传请求进程的生命期到期时，移除或结束自动重传请求进程。
在本发明的一些实施例中，第一预定号包括以下至少之一：进程号、包序号。
在本发明的一些实施例中，当判断出数据包接收不正确时，可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明实施例中，第一维护模块802具体用于采用以下至少之一方式实现维护第一预定号对应的自动重传请求进程的生命期。
第一种方式：当接收到的数据包满足第一预定条件时，开始维护所述第一预定号对应的自动重传请求进程的生命期。在一些实施例中，当采用计时器维护自动重传请求进程的生命期时，可以使计时器开始计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器开始计数或倒计数。
第二种方式：当接收到的数据包满足第二预定条件时，继续维护与所述数据包的第一预定号相同的自动重传请求进程的生命期。在一些实施例中，当采用计时器维护自动重传请求进程的生命期时，可以使计时器继续计时或倒计时，或根据重新获得的生命期计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器继续计数或倒计数，或根据重新获得的生命期计数或倒计数。
在本发明的一些实施例中，第一预定条件包括接收到的数据包为新传的数据包；或者，接收到的数据包的第一预定号与当前维护的自动重传请求进程对应的第一预定号均不相同。
其中，第二预定条件包括接收到的数据包为重传数据包。
或者，当前维护的自动重传请求进程中存在对应的第一预定号与所述数据包的第一预定号相同的自动重传请求进程。
在本发明实施例中，第一维护模块802具体用于采用以下任意一个方法实现判断接收到的数据包为新传的数据包还是重传的数据包。
第一种：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传的数据包还是重传数据包。在一些实施例中，当新传指示信息指示为新传的数据包时，确定接收到的数据包为新传数据包；当新传指示信息指示为重传的数据包时，确定接收到的数据包为重传数据包。
第二种：判断数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号是否相同。在一些实施例中，当数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在进程号与数据包中携带的进程号相同的自动重传请求进程时，确定接收到的数据包为重传数据包。
第三种：判断数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号是否相同。在一些实施例中，当数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在包序号与数据包中携带的包序号相同的自动重传请求进程时，确定接收到的数据包为重 传数据包。
在本发明的一些实施例中，第一维护模块802可以通过计时器或计数器维护自动重传请求进程的生命期。
其中，生命期包括以下至少之一：时间长度、生命期的终点时刻、次数。
在本发明的一些实施例中，时间长度包括以下任意一个：有效时间长度、剩余时间长度。
在本发明的一些实施例中，次数包括以下任意一个：新传数据包以及重传携带有与新传数据包相同的第一预定号的数据包的总次数、新传的数据包以及重传携带有与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
其中，有效时间长度是指从自动重传请求进程被创建或配置开始到自动重传请求进程被移除之间的时间间隔。
剩余时间长度是指从当前时刻到自动重传请求进程被移除之间的时间间隔。
生命期的终点时刻是指自动重传请求进程被移除的时刻。
在本发明的一些实施例中，当生命期为有效时间长、或剩余时间长度时，可以通过计时器维护自动重传请求进程的生命期，具体可以采用计时或倒计时的方式，即为为接收到的数据包创建或配置自动重传请求进程后启动计时器开始计时或倒计时。
当生命期为新传数据包以及重传数据包的总次数、或新传数据包以及重传数据包的剩余次数、或重传数据包的总次数、或重传数据包的剩余次数时，可以通过计数器维护自动重传请求进程的生命期，具体可以采用计数或倒计数的方式，即为接收到的数据包创建或配置自动重传请求进程后启动计数器开始计数或倒计数。
在本发明的一些实施例中，第一维护模块802和第二移除模块803可以采用以下任一种方式获得生命期。
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第三种方式：根据所述数据包中携带的生命期获得。
第四种方式：根据通知的生命期获得。
第五种方式：根据协商的生命期获得。
第六种方式：根据预先设置的生命期获得。
在本发明的一些实施例中，第二预定号可以是冗余版本号。
在本发明另一个实施例中，当生命期为时间长度，且采用计时方式维护生命期时，生命期到期是指计时器计时达到生命期所指示的时间长度。
当生命期为终点时刻，且采用计时方式维护生命期时，生命期到期是指计时器计时达到终点时刻。
当生命期为次数，且采用计数方式维护生命期时，生命期到期是指计数器计数达到生命期所指示的次数；
当生命期为时间长度和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期所指示的时间长度；计数器计数达到生命期所指示的次数。
当生命期为终点时刻和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期的终点时刻；计数器计数达到生命期所指示的次数。
当采用倒计时方式维护生命期时，生命期到期是指计时器计时为0。
当采用倒计数方式维护生命期时，生命期到期是指计数器计数为0。
当采用倒计时和倒计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时为0；计数器计数为0。
在本发明另一个实施例中，第一维护模块802还用于：当判断出数据包接收不正确，且接收到的数据包为新传数据包，且无法获得所述数据包所携带的第一预定号；或者，判断出数据包接收不正确，且接收到的数据包为重 传数据包，且无法获得所述数据包所携带的第一预定号时，丢弃该数据包。
本发明实施例在自动重传请求进程的生命期到期时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
参见图9，本发明另一个实施例提出了一种传输装置，包括：第二接收模块901和第二维护模块902。
第二接收模块901，用于接收到数据包。
第二维护模块902，用于当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
在本发明为另一个实施例中，第二维护模块902还用于：将接收到的数据包缓存到第一自动重传缓存块中，或者，将接收到的数据包和第一自动重传缓存块中已缓存的数据包进行合并处理，将合并处理后的数据包缓存到第一自动重传缓存块中。
在本发明实施例中，当判断出数据包接收不正确时，可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明实施例中，第二维护模块902具体用于采用以下至少之一方式实现维护数据包对应的第一自动重传缓存块的生命期。
第一种方式：在所述数据包满足第三预定条件时，开始维护所述数据包对应的第一自动重传缓存块的生命期。
第二种方式：在所述数据包满足第四预定条件时，继续维护所述数据包对应的第一自动重传缓存块的生命期。
第三种方式：在所述数据包满足所述第三预设条件时，该方法还包括：为所述数据包配置第一自动重传缓存块的生命期。
在本发明实施例中，第三预定条件包括数据包中携带的新传指示信息指示为新传数据包；或者，数据包所携带的第三预定号与自动重传缓存区中的所有自动重传缓存块中缓存的数据包携带的第三预定号均不相同。
在本发明实施例中，数据包所携带的第三预定号与自动重传缓存区中的自动重传缓存块中缓存的数据包所携带的第三预定号均不相同有以下两种可能的情况：
一、接收到的数据包为新传数据包。
二、接收到的数据包为重传数据包，但是该数据包之前维护的自动重传缓存块的生命期已经结束，即自动重传缓存块已被清空或重新覆盖。
在本发明实施例中，第四预定条件包括以下任一个。
1、数据包中携带的新传指示信息指示为重传数据包。
2、自动重传缓存区中存在第二自动重传缓存块。
在本发明的一些实施例中，第二自动重传缓存块缓存的数据包携带的第三预定号与接收到的数据包携带的第三预定号相同。
在本发明的一些实施例中，所述第三预定号包包序号或者发送所述数据包的站点标识。
在本发明的一些实施例中，站点标识包括关联标识、部分关联标识、媒体访问控制(MAC，Media Access Control)地址中的任意一个。
在本发明实施例中，第二维护模块902具体用于采用以下任一种方式判断接收到的数据包为新传数据包还是重传数据包。
第一种方式：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传数据包还是重传数据包。在一些实施例中，当新传指示信息指示为新传数据包时，确定接收到的数据包为新传数据包；当新传指示信息指示为重传数据包时，确定接收到的数据包为重传数据包。
第二种方式：判断数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号是否相同。在一些实施例中，当数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号均不相同时，确定接收到的数据包为新传数据包；当自动重传缓存区中存在第二自动重传缓存块时，确定接收到的数据包为重传数据包。
在本发明实施例中，第二维护模块902可以采用计时或倒计时的方式维护自动重传缓存块的生命期。
在本发明实施例中，还包括：清空模块903。
清空模块903，用于在所述数据包对应的第一自动重传缓存块的生命期到期时，清空或重新覆盖所述数据包对应的第一自动重传缓存块。
本发明实施例在自动重传缓存块的生命期到期时，清空或重新覆盖自动重传缓存块，使得自动重传缓存块得到及时释放，在自动重传缓存块数量有限的前提下，可以及时缓存新的数据包，从而提高了传输效率。
本发明另一个实施例提出了一种传输装置，包括处理器和计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令被所述处理器执行时，实现上述任一种传输方法。
本发明另一个实施例提出了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述任一种传输方法的步骤。
参见图10，本发明另一个实施例提出了一种传输系统，包括：第一发送方1001和第一接收方1002。
第一发送方1001，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
第一接收方1002，用于接收到数据包；当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
在本发明实施例中，第一发送方1001可以在发送第一数据包前创建第一数据包的自动重传请求进程，或者在发送第一数据包时创建第一数据包的自动重传请求进程，或者在发送第一数据包后创建第一数据包的自动重传请求进程。也就是说，第一发送方1001发送第一数据包的时间和创建第一数据包的自动重传请求进程的时间之差的绝对值在预定时间阈值内即可。
在本发明实施例中，第一数据包可以是新传数据包，也可以是重传数据包，本发明实施例对此不作限定。
在本发明另一个实施例中，第一发送方1001还用于：开始维护所述自动重传请求进程的生命期。
在本发明实施例中，第一发送方1001和第一接收方1002可以通过计时 器或计数器维护自动重传请求进程的生命期。
在本发明的一些实施例中，生命期包括以下至少之一：时间长度、生命期的终点时刻、次数。
在本发明的一些实施例中，所述时间长度包括以下任意一个：有效时间长度、剩余时间长度；
在本发明的一些实施例中次数包括以下任意一个：新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的总次数、新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
其中，有效时间长度是指从自动重传请求进程被创建或配置开始到自动重传请求进程被移除之间的时间间隔。
剩余时间长度是指从当前时刻到自动重传请求进程被移除之间的时间间隔。
生命期的终点时刻是指自动重传请求进程被移除的时刻。
在本发明的一些实施例中，当生命期为有效时间长、或剩余时间长度时，可以通过计时器维护自动重传请求进程的生命期，具体可以采用计时或倒计时的方式。
当生命期为新传数据包以及重传数据包的总次数、或新传数据包以及重传数据包的剩余次数、或重传数据包的总次数、或重传数据包的剩余次数时，可以通过计数器维护自动重传请求进程的生命期，具体可以采用计数或倒计数的方式。
本发明实施例对开始维护自动重传请求进程的生命期的时刻不作限定，例如，可以在设置自动重传请求进程的生命期时开始维护自动重传请求进程的生命期。
在本发明实施例中，第一发送方1001可以采用以下任一种方式获得生命期：
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包的第二预定号获得。
第三种方式：根据通知的生命期获得。
第四种方式：根据协商的生命期获得。
第五种方式：根据预先设置的生命期获得。
在本发明的一些实施例中，第二预定号可以是冗余版本号。
在本发明另一个实施例中，第一发送方1001还用于：在自动重传请求进程的生命期内满足预设重传条件时，重传第二数据包；所述第一数据包和所述第二数据包携带有相同的第一预定号。
在本发明实施例中，第一发送方1001在判断自动重传请求进程的生命期内是否满足预设重传条件，以及重传第二数据包的过程中继续维护自动重传请求进程的生命期。
在本发明实施例中，所述第一预定号包括以下至少之一：进程号、包序号。
在本发明实施例中，预设重传条件包括以下至少之一。
1、接收到接收方回复的接收不正确确认帧。
2、通过竞争接入机制竞争到信道的时刻在所述自动重传请求进程的生命期内。
3、接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内。
第二预定时间间隔内未接收到接收方回复的确认帧，所述确认帧包括接收正确确认帧或接收不正确确认帧。
在本发明的一些实施例中，当接收到接收方回复的接收不正确确认帧时，第一发送方1001可以采用以下任一种方法重传第二数据包。
第一种、在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔(例如短帧帧间间隔(SIFS，Short InterFrame Space))后重传第二数据包。
该方法中，默认在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内，因此，认为第一预定时间间隔后生命期没有到期，可以在第一预定时间间隔后重传第二数据包。
第二种、在接收到接收方回复的接收不正确确认帧后，在生命期内，按照竞争接入机制竞争到信道时重传第二数据包。
第三种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，将自动重传请求进程的生命期延长到接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔后的第三预定时间间隔；其中，所述第三预定时间间隔至少为重传第二数据包所需要的时间；在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包。
第四种、当接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内时，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后重传第二数据包；当接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔内的部分或全部时刻在所述自动重传请求进程的生命期外时，在自动重传请求进程的生命期到期时，移除自动重传请求进程，也就是说，在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后不再重传第二数据包。
在本发明实施例中，第一数据包或第二数据包中还携带
生命期、生命期的终点时刻、剩余时间长度、剩余次数中的至少一者。
在本发明的一些实施例中，所述第二数据包与所述第一数据包相同，或所述第二数据包与所述第一数据包的冗余版本不同。
在本发明另一个实施例中，第一发送方1001还用于：在所述自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束自动重传请求进程。
在本发明另一个实施例中，当生命期为时间长度，且采用计时方式维护生命期时，生命期到期是指计时器计时达到生命期所指示的时间长度。
当生命期为终点时刻，且采用计时方式维护生命期时，生命期到期是指计时器计时达到终点时刻。
当生命期为次数，且采用计数方式维护生命期时，生命期到期是指计数器计数达到生命期所指示的次数。
当生命期为时间长度和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期所指示的时间长度；计数器计数达到生命期所指示的次数。
当生命期为终点时刻和次数，且采用计时和计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时达到生命期的终点时刻；计数器计数达到生命期所指示的次数。
当采用倒计时方式维护生命期时，生命期到期是指计时器计时为0。
当采用倒计数方式维护生命期时，生命期到期是指计数器计数为0。
当采用倒计时和倒计数方式维护生命期时，生命期到期是指以下任意一个条件满足：计时器计时为0；计数器计数为0。
在本发明实施例中，第一发送方1001具体用于采用以下至少之一方式实现移除或结束所述自动重传请求进程。
第一种方式：停止发送所述第一数据包或重传第二数据包。
第二种方式：停止发送携带有所述第一预定号的数据包。
第三种方式：停止使用自动重传请求机制发送第一数据包或重传第二数据包。
本发明实施例在自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
在本发明实施例中，第一预定号包括以下至少之一：进程号、包序号。
在本发明实施例中，当第一接收方1002判断出数据包接收不正确时，可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明实施例中，第一接收方1002具体用于采用以下至少之一方式实现维护第一预定号对应的自动重传请求进程的生命期。
第一种方式：当接收到的数据包满足第一预定条件时，开始维护所述第一预定号对应的自动重传请求进程的生命期。在一些实施例中，当采用计时器维护自动重传请求进程的生命期时，可以使计时器开始计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器开始计数或倒计数。
第二种方式：当接收到的数据包满足第二预定条件时，继续维护与所述数据包的第一预定号相同的自动重传请求进程的生命期。在一些实施例中，当采用计时器维护自动重传请求进程的生命期时，可以使计时器继续计时或倒计时，或根据重新获得的生命期计时或倒计时；当采用计数器维护自动重传请求进程的生命期时，可以使计数器继续计数或倒计数，或根据重新获得的生命期计数或倒计数。
在本发明的一些实施例中，第一预定条件包括：接收到的数据包为新传的数据包；或者，接收到的数据包的第一预定号与当前维护的自动重传请求进程对应的第一预定号均不相同。
在本发明的一些实施例中，第二预定条件包括：接收到的数据包为重传数据包；或者，当前维护的自动重传请求进程中存在对应的第一预定号与所述数据包的第一预定号相同的自动重传请求进程。
在本发明实施例中，第一接收方1002可以采用以下任意一个方法判断接收到的数据包为新传数据包还是重传数据包。
第一种方式：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传数据包还是重传数据包。在一些实施例中，当新传指示信息指示为新传数据包时，确定接收到的数据包为新传数据包；当新传指 示信息指示为重传数据包时，确定接收到的数据包为重传数据包。
第二种方式：判断数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号是否相同。在一些实施例中，当数据包中携带的进程号与已创建或配置的自动重传请求进程对应的进程号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在进程号与数据包中携带的进程号相同的自动重传请求进程时，确定接收到的数据包为重传数据包。
第三种方式：判断数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号是否相同。在一些实施例中，当数据包中携带的包序号与已创建或配置的自动重传请求进程对应的包序号均不相同时，确定接收到的数据包为新传数据包；当已创建或配置的自动重传请求进程中存在包序号与数据包中携带的包序号相同的自动重传请求进程时，确定接收到的数据包为重传数据包。
在本发明实施例中，第一接收方1002可以采用以下任一种方式获得生命期。
第一种方式：根据所述生命期和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第二种方式：根据所述生命期的终点时刻或剩余时间长度或剩余次数和所述数据包的第二预定号之间的映射关系以及所述数据包中携带的第二预定号获得。
第三种方式：根据所述数据包中携带的生命期获得。
第四种方式：根据通知的生命期获得。
第五种方式：根据协商的生命期获得。
第六种方式：根据预先设置的生命期获得。
在本发明的一些实施例中，第二预定号可以是冗余版本号。
在本发明另一个实施例中，当判断出数据包接收不正确，且接收到的数据包为新传数据包，且无法获得所述数据包所携带的第一预定号；或者，判断出数据包接收不正确，且接收到的数据包为重传数据包，且无法获得所述 数据包所携带的第一预定号时，丢弃该数据包。
在本发明实施例中，第一接收方1002还用于：当自动重传请求进程的生命期到期时，移除或结束自动重传请求进程。
本发明实施例在自动重传请求进程的生命期到期时，移除或结束第一数据包或第二数据包所对应的自动重传请求进程，使得自动重传请求进程得到及时移除，在同时支持的自动重传请求进程数量有限的前提下，可以及时为新传数据包创建新的自动重传请求进程，从而提高了传输效率。
参见图11，本发明另一个实施例提出了一种传输系统，包括：第二发送方1101和第二接收方1102。
第二发送方1101用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
第二接收方1102用于接收到数据包；当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
在本发明实施例中，第二发送方1101的具体实现过程与前述实施例第一发送方1001的具体实现过程相同，这里不再赘述。
在本发明另一个实施例中，第二接收方1102还用于：将接收到的数据包缓存到第一自动重传缓存块中，或者，将接收到的数据包和第一自动重传缓存块中已缓存的数据包进行合并处理，将合并处理后的数据包缓存到第一自动重传缓存块中。
在本发明实施例中，当判断出数据包接收不正确时，第二接收方1102可以回复接收不正确确认帧；或者不回复任何信息；当判断出数据包接收正确时，回复接收正确确认帧。
在本发明实施例中，第二接收方1102具体用于采用以下至少之一方式实现维护数据包对应的第一自动重传缓存块的生命期。
第一种方式：在所述数据包满足第三预定条件时，开始维护所述数据包对应的第一自动重传缓存块的生命期。
第二种方式：在所述数据包满足第四预定条件时，继续维护所述数据包对应的第一自动重传缓存块的生命期。
第三种方式：在所述数据包满足所述第三预设条件时，该方法还包括：为所述数据包配置第一自动重传缓存块的生命期。
在本发明实施例中，第三预定条件包括：数据包中携带的新传指示信息指示为新传数据包；或者，数据包所携带的第三预定号与自动重传缓存区中的所有自动重传缓存块中缓存的数据包携带的第三预定号均不相同。
在本发明实施例中，数据包所携带的第三预定号与自动重传缓存区中的自动重传缓存块中缓存的数据包携带的第三预定号均不相同有以下两种可能的情况：
一、接收到的数据包为新传数据包。
二、接收到的数据包为重传数据包，但是该数据包之前维护的自动重传缓存块的生命期已经结束，即自动重传缓存块已被清空或重新覆盖。
在本发明实施例中，第四预定条件包括：数据包中携带的新传指示信息指示为重传数据包；或者自动重传缓存区中存在第二自动重传缓存块。
在本发明的一些实施例中，第二自动重传缓存块缓存的数据包携带的第三预定号与接收到的数据包携带的第三预定号相同。
在本发明实施例中，所述第三预定号包括：包序号或发送所述数据包的站点标识。
在本发明的一些实施例中，站点标识包括：关联标识、部分的关联标识、媒体访问控制(MAC，Media Access Control)地址中任意一个。
在本发明的一些实施例中，部分的关联标识可以是关联标识的一部分，或者根据关联标识计算得到。
在本发明的一些实施例中，可以采用计时或倒计时的方式维护自动重传缓存块的生命期。
在本发明实施例中，第二接收方1102可以采用以下任一种方式判断接收到的数据包为新传数据包还是重传数据包。
第一种方式：根据所述接收到的数据包中携带的新传指示信息判断所述接收到的数据包为新传数据包还是重传数据包。在一些实施例中，当新传指示信息指示为新传数据包时，确定接收到的数据包为新传数据包；当新传指 示信息指示为重传数据包时，确定接收到的数据包为重传数据包。
第二种方式：判断数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号是否相同。在一些实施例中，当数据包携带的第三预定号与自动重传缓存块中缓存的数据包携带的第三预定号均不相同时，确定接收到的数据包为新传数据包；当自动重传缓存区中存在第二自动重传缓存块时，确定接收到的数据包为重传数据包。
在本发明另一个实施例中，第二接收方1102还用于：在所述数据包对应的第一自动重传缓存块的生命期到期时，清空或重新覆盖所述数据包对应的第一自动重传缓存块。
本发明实施例在自动重传缓存块的生命期到期时，清空或重新覆盖自动重传缓存块，使得自动重传缓存块得到及时释放，在自动重传缓存块数量有限的前提下，可以及时缓存新的数据包，从而提高了传输效率。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些组件或所有组件可以被实施为由处理器，如数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递 送介质。
虽然本发明实施例所揭露的实施方式如上，但所述的内容仅为便于理解本发明实施例而采用的实施方式，并非用以限定本发明实施例。任何本发明实施例所属领域内的技术人员，在不脱离本发明实施例所揭露的精神和范围的前提下，可以在实施的形式及细节上进行任何的修改与变化，但本发明实施例的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (37)

  1. 一种传输方法，包括：
    创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
  2. 根据权利要求1所述的传输方法，其中，所述生命期包括以下至少之一：时间长度、生命期的终点时刻、次数；
    其中，所述时间长度包括以下任意一个：有效时间长度、剩余时间长度；
    所述次数包括以下任意一个：新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的总次数、新传数据包以及重传携带与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
  3. 根据权利要求1所述的传输方法，其中，该方法还包括：
    开始维护所述自动重传请求进程的生命期。
  4. 根据权利要求3所述的传输方法，其中，该方法还包括：
    在所述自动重传请求进程的生命期内满足预设重传条件时，重传第二数据包；所述第一数据包和所述第二数据包携带有相同的第一预定号。
  5. 根据权利要求4所述的传输方法，其中，所述第一预定号包括以下至少之一：进程号、包序号。
  6. 根据权利要求4所述的传输方法，其中，其中，所述预设重传条件包括以下至少之一：
    接收到接收方回复的接收不正确确认帧；
    通过竞争接入机制竞争到信道的时刻在所述自动重传请求进程的生命期内；
    接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻均在自动重传请求进程的生命期内；
    第二预定时间间隔内未接收到接收方回复的确认帧。
  7. 根据权利要求6所述的传输方法，其中，当接收到所述接收方回复 的接收不正确确认帧后的第一预定时间间隔内的至少部分时刻，在所述自动重传请求进程的生命期外时，该方法还包括：
    将所述自动重传请求进程的生命期，延长到接收到所述接收方回复的接收不正确确认帧后的第一预定时间间隔后的第三预定时间间隔；其中，所述第三预定时间间隔至少为重传第二数据包所需要的时间；
    所述重传第二数据包包括：
    在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后，重传所述第二数据包。
  8. 根据权利要求4所述的传输方法，其中，当所述预设重传条件为接收到接收方回复的接收不正确确认帧；或接收到接收方回复的接收不正确确认帧后的第一预定时间间隔内的所有时刻，均在自动重传请求进程的生命期内时，所述重传第二数据包包括：
    在接收到接收方回复的接收不正确确认帧后的第一预定时间间隔后，重传所述第二数据包。
  9. 根据权利要求1所述的传输方法，其中，所述生命期采用以下任一种方式获得：
    根据所述生命期和所述数据包的第二预定号之间的映射关系，以及所述数据包的第二预定号获得；
    根据所述生命期的终点时刻、剩余时间长度、剩余次数中的任意一者，与所述数据包的第二预定号之间的映射关系，以及所述数据包的第二预定号获得；
    根据通知的生命期获得；
    根据协商的生命期获得；
    根据预先设置的生命期获得。
  10. 根据权利要求9所述的传输方法，其中，所述第二预定号为冗余版本号。
  11. 根据权利要求1或4所述的传输方法，其中，所述第一数据包或第二数据包中还携带以下至少之一：
    生命期、生命期的终点时刻、剩余时间长度、剩余次数。
  12. 根据权利要求1或4所述的传输方法，其中，所述第二数据包与所述第一数据包相同，或所述第二数据包与所述第一数据包的冗余版本不同。
  13. 根据所述权利要求1或4所述的方法，其中，该方法还包括：
    在所述自动重传请求进程的生命期到期，或接收到接收方回复的接收正确确认帧时，移除或结束所述自动重传请求进程。
  14. 根据权利要求13所述的传输方法，其中，所述移除或结束所述自动重传请求进程包括以下至少之一：
    停止发送所述第一数据包或重传第二数据包；
    停止发送携带有所述第一预定号的数据包；
    停止使用自动重传请求机制发送第一数据包或重传第二数据包。
  15. 一种传输方法，包括：
    接收到数据包；
    当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护所述第一预定号对应的自动重传请求进程的生命期。
  16. 根据权利要求15所述的传输方法，其中，该方法还包括：
    在所述自动重传请求进程的生命期到期时，移除或结束所述自动重传请求进程。
  17. 根据权利要求15或16所述的传输方法，其中，
    所述第一预定号包括以下至少之一：进程号、包序号。
  18. 根据权利要求15或16所述的传输方法，其中，所述维护第一预定号对应的自动重传请求进程的生命期，包括以下至少之一：
    当接收到的数据包满足第一预定条件时，开始维护所述第一预定号对应的自动重传请求进程的生命期；
    当接收到的数据包满足第二预定条件时，继续维护与所述数据包的第一预定号相同的自动重传请求进程的生命期。
  19. 根据权利要求18所述的传输方法，其中，所述第一预定条件包括以下任意一个：
    接收到的数据包为新传数据包；
    接收到的数据包的第一预定号与当前维护的自动重传请求进程对应的第一预定号均不相同。
  20. 根据权利要求18所述的传输条件，其特征在于，所述第二预定条件包括以下任意一个：
    接收到的数据包为重传数据包；
    当前维护的自动重传请求进程中存在对应的第一预定号与所述数据包的第一预定号相同的自动重传请求进程。
  21. 根据权利要求19或20所述的传输方法，其中，所述判断接收到的数据包为新传数据包还是重传数据包，包括以下任意一个：
    根据所述接收到的数据包中携带的新传指示信息，判断所述接收到的数据包为新传数据包还是重传数据包；
    判断数据包中携带的第一预定号，与已创建或配置或当前维护的自动重传请求进程对应的第一预定号是否相同。
  22. 根据权利要求15或16所述的传输方法，其中，所述生命期包括以下至少之一：时间长度、生命期的终点时刻、次数；
    其中，所述时间长度包括以下任意一个：有效时间长度、剩余时间长度；
    次数包括以下任意一个：新传数据包以及重传携带有与新传数据包相同的第一预定号的数据包的总次数、新传的数据包以及重传携带有与新传数据包相同的第一预定号的数据包的剩余总次数、重传数据包的总次数、重传数据包的剩余次数。
  23. 根据权利要求15或16所述的传输方法，其中，所述生命期采用以下任一种方式获得：
    根据所述生命期和所述数据包的第二预定号之间的映射关系，以及所述数据包中携带的第二预定号获得；
    根据所述数据包中携带的生命期获得；
    根据通知的生命期获得；
    根据协商的生命期获得；
    根据预先设置的生命期获得。
  24. 根据权利要求23所述的传输方法，其中，所述第二预定号为冗余版本号。
  25. 一种传输方法，包括：
    接收到数据包；
    当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
  26. 根据权利要求25所述的传输方法，其中，该方法还包括：
    在所述数据包对应的第一自动重传缓存块的生命期到期时，清空或重新覆盖所述数据包对应的第一自动重传缓存块。
  27. 根据权利要求25或26所述的传输方法，其中，所述维护数据包对应的第一自动重传缓存块的生命期包括以下至少之一：
    在所述数据包满足第三预定条件时，开始维护所述数据包对应的第一自动重传缓存块的生命期；
    在所述数据包满足第四预定条件时，继续维护所述数据包对应的第一自动重传缓存块的生命期；
    在所述数据包满足所述第三预设条件时，该方法还包括：为所述数据包配置第一自动重传缓存块的生命期。
  28. 根据权利要求27所述的传输方法，其中，第三预定条件包括以下任一个：
    所述数据包中携带的新传指示信息指示为新传数据包；
    所述数据包所携带的第三预定号，与自动重传缓存区中的所有自动重传缓存块中缓存的数据包携带的第三预定号均不相同。
  29. 根据权利要求27所述的传输方法，其中，所述第四预定条件包括以下任一个：
    所述数据包中携带的新传指示信息指示为重传数据包；
    所述自动重传缓存区中存在第二自动重传缓存块；
    其中，所述第二自动重传缓存块缓存的数据包携带的第三预定号，与接 收到的数据包携带的第三预定号相同。
  30. 根据权利要求28或29所述的传输方法，其中，所述第三预定号包括以下任意一个：
    包序号、发送所述数据包的站点标识；
    其中，站点标识包括以下任意一个：
    关联标识、部分的关联标识、媒体访问控制MAC地址。
  31. 一种传输装置，包括：
    创建模块，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包。
  32. 一种传输装置，包括：
    第一接收模块，用于接收到数据包；
    第一维护模块，用于当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进程的生命期。
  33. 一种传输装置，包括：
    第二接收模块，用于接收到数据包；
    第二维护模块，用于当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
  34. 一种传输装置，包括处理器和计算机可读存储介质，所述计算机可读存储介质中存储有指令，其特征在于，当所述指令被所述处理器执行时，实现如权利要求1～30任一项所述的传输方法。
  35. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现如权利要求1～30任一项所述的传输方法的步骤。
  36. 一种传输系统，包括：
    第一发送方，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包；
    第一接收方，用于接收到数据包；当判断出数据包接收不正确，且获得所述数据包所携带的第一预定号时，维护第一预定号对应的自动重传请求进 程的生命期。
  37. 一种传输系统，包括：
    第二发送方，用于创建第一数据包的自动重传请求进程；设置所述自动重传请求进程的生命期；发送第一数据包；
    第二接收方，用于接收到数据包；当判断出数据包接收不正确时，维护数据包对应的第一自动重传缓存块的生命期。
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