WO2020125647A1 - Procédé, dispositif et système de retransmission de données - Google Patents

Procédé, dispositif et système de retransmission de données Download PDF

Info

Publication number
WO2020125647A1
WO2020125647A1 PCT/CN2019/126073 CN2019126073W WO2020125647A1 WO 2020125647 A1 WO2020125647 A1 WO 2020125647A1 CN 2019126073 W CN2019126073 W CN 2019126073W WO 2020125647 A1 WO2020125647 A1 WO 2020125647A1
Authority
WO
WIPO (PCT)
Prior art keywords
duration
retransmission
rtt
threshold
data storage
Prior art date
Application number
PCT/CN2019/126073
Other languages
English (en)
Chinese (zh)
Inventor
张龙
黄凡夫
王兴鹤
Original Assignee
杭州海康威视数字技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杭州海康威视数字技术股份有限公司 filed Critical 杭州海康威视数字技术股份有限公司
Publication of WO2020125647A1 publication Critical patent/WO2020125647A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H04L1/1678—Details of the supervisory signal the supervisory signal being transmitted together with control information where the control information is for timing, e.g. time stamps
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems

Definitions

  • the present disclosure relates to the field of data transmission technology, and in particular, to a method, device, and system for retransmitting data.
  • the sequence number of the lost data packet can be determined based on the sequence number of the received data packet.
  • the receiving end may send a retransmission request to the sending end, and the retransmission request carries the sequence number of the lost data packet.
  • the sending end can find whether there is a missing data packet in the cache based on the sequence number of the missing data packet, if there is a missing data packet in the cache, then obtain the missing data packet and send the missing data packet to the receiving end .
  • RTT Red-Trip Time
  • the RTT duration is calculated by the receiving end according to the current network condition and a preset estimation algorithm according to a preset period.
  • the value of the RTT duration indicates the expected duration of the retransmission request from the receiving end to the sending end and the sending end to return a lost packet one round trip. In the case of poor network conditions, the RTT duration is longer, in the case of better network conditions , RTT duration is shorter.
  • NPQ Network Protocol Quality, network protocol quality library
  • the receiving end will repeat the process described above until it receives a lost data packet or the value of the retransmission parameter corresponding to the same retransmission request exceeds the corresponding preset retransmission parameter threshold.
  • the retransmission parameters include the total retransmission time and the number of retransmissions.
  • the preset retransmission parameter threshold corresponding to the total retransmission time is the total retransmission time threshold, and the preset retransmission corresponds to the number of retransmissions.
  • the parameter threshold is the threshold of retransmission times.
  • the threshold for the total retransmission time duration can be a fixed value, or it can be the maximum length of time that you can wait for a lost packet when the network conditions are poor.
  • the threshold of the number of times of retransmission may also be a fixed value such as 10 times.
  • the threshold of the number of times of retransmission may also be a fixed value such as 10 times.
  • the RTT time is long and it is easy to lose packets.
  • the receiving end often requires a long total retransmission time to receive the lost packet returned, even in some cases, after the retransmission timeout , Still cannot receive the lost packet returned. Therefore, in the application scenarios of real-time data transmission, such as video conference application scenarios, using the above retransmission mechanism in the case of poor network conditions will cause a longer time to wait for the lost data packets, and the flexibility of data transmission is more difference.
  • a method for retransmitting data includes:
  • the RTT duration is updated, and the process of determining the retransmission parameter threshold based on the RTT duration is performed;
  • the retransmission parameters include the total retransmission time and/or the number of retransmissions
  • the threshold of the retransmission parameter corresponding to the total retransmission time is the threshold of the total retransmission time and the number of retransmissions
  • the corresponding threshold of the retransmission parameter is the threshold of the number of retransmissions.
  • the threshold value of the retransmission parameter is a threshold value of the total consumption time of the retransmission.
  • the acquiring the RTT duration and determining the threshold of the retransmission parameter based on the RTT duration includes:
  • the sum of the product and the preset reserved duration is determined as a total consumption duration threshold for retransmission.
  • the method further includes:
  • the threshold of the retransmission parameter is a threshold of the number of retransmissions
  • the acquiring the RTT duration, and determining the threshold of the retransmission parameter based on the RTT duration includes:
  • the RTT duration and determine the second reference retransmission number corresponding to the RTT duration range to which the acquired RTT duration belongs based on the correspondence relationship between the preset RTT duration range and the reference retransmission times, wherein, in the correspondence, the RTT duration range The larger the value, the fewer the retransmission times;
  • the threshold value of the retransmission times is determined.
  • the determining the threshold of the number of retransmissions based on the comparison result of the second reference number of retransmissions and the third reference number of retransmissions determined when the retransmission request was sent last time includes:
  • the second reference retransmission number is greater than or equal to the previously determined third reference retransmission number, determine the second reference retransmission number as the retransmission number threshold;
  • the retransmission number is determined as a threshold of retransmission times
  • the second reference retransmission count is determined as the retransmission count threshold.
  • the acquiring the RTT duration, based on the correspondence between the preset RTT duration range and the reference retransmission times, determining the second reference retransmission count corresponding to the RTT duration range to which the acquired RTT duration belongs includes:
  • the type of the data packet is in the preset type set, then based on the first correspondence between the preset RTT duration range and the reference retransmission times, determine the second reference weight corresponding to the RTT duration range to which the acquired RTT duration belongs Transmission times
  • the second corresponding to the RTT duration range to which the acquired RTT duration belongs Reference number of retransmissions where the number of reference retransmissions corresponding to the same RTT duration range in the first correspondence is greater than or equal to the number of reference retransmissions corresponding to the second correspondence.
  • a method for retransmitting data includes:
  • the RTT duration is obtained, and based on the RTT duration, the first data storage reference duration is determined;
  • the determining the data storage duration threshold based on the first data storage reference duration and the second data storage reference duration determined when the previous data packet was stored in the cache includes:
  • the data storage duration threshold is determined based on the first data storage reference duration, the second data storage reference duration determined when the previous data packet was stored in the cache, and the pre-acquired reservation duration.
  • the determining the data storage duration threshold based on the first data storage reference duration, the second data storage reference duration determined when the previous data packet was stored in the cache, and the pre-acquired reservation duration includes: :
  • the second data storage reference duration is obtained in advance
  • the sum of the reserved time is determined as the data storage time threshold
  • first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference is greater than or equal to the second data storage reference duration, it is determined that the first data storage reference duration is equal to A duration difference between the second data storage reference durations, determining a product between the duration difference and a preset scale factor, and determining a sum between the product and the first data storage reference duration , The sum of the sum value and the reserved duration is determined as the data storage duration threshold;
  • the sum of the first data storage reference duration and the reserved duration is determined as a data storage duration threshold.
  • the method further includes:
  • the reserved duration is determined based on the frame rate of the video frame to which the data packet belongs.
  • an apparatus for retransmitting data includes:
  • the sending module is used to send a retransmission request for the lost data packet to the sending end when a packet loss event is detected;
  • the determining module is used to obtain the RTT duration, and determine the retransmission parameter threshold based on the RTT duration;
  • the update module is used to update the RTT duration when the data packet is not received when the retransmission request is reached after the retransmission request is sent, and go to the process of determining the retransmission parameter threshold based on the RTT duration;
  • the stopping module is configured to stop sending the retransmission request of the data packet if the value of the retransmission parameter reaches the corresponding threshold value of the retransmission parameter, if the data packet is not received.
  • the retransmission parameters include the total retransmission time and/or the number of retransmissions
  • the threshold of the retransmission parameter corresponding to the total retransmission time is the threshold of the total retransmission time and the number of retransmissions
  • the corresponding threshold of the retransmission parameter is the threshold of the number of retransmissions.
  • the threshold of the retransmission parameter is a threshold of the total retransmission duration
  • the determining module is configured to:
  • the sum of the product and the preset reserved duration is determined as a total consumption duration threshold for retransmission.
  • the determination module is also used to:
  • the threshold of the retransmission parameter is a threshold of the number of retransmissions
  • the determination module is configured to:
  • the RTT duration and determine the second reference retransmission number corresponding to the RTT duration range to which the acquired RTT duration belongs based on the correspondence relationship between the preset RTT duration range and the reference retransmission times, wherein, in the correspondence, the RTT duration range The larger the value, the fewer the retransmission times;
  • the threshold value of the retransmission times is determined.
  • the determination module is configured to:
  • the second reference retransmission number is greater than or equal to the previously determined third reference retransmission number, determine the second reference retransmission number as the retransmission number threshold;
  • the retransmission times are determined as a threshold of retransmission times
  • the second reference retransmission count is determined as the retransmission count threshold.
  • the determination module is configured to:
  • the type of the data packet is in the preset type set, then based on the first correspondence between the preset RTT duration range and the reference retransmission times, determine the second reference weight corresponding to the RTT duration range to which the acquired RTT duration belongs Transmission times
  • the second corresponding to the RTT duration range to which the acquired RTT duration belongs Reference number of retransmissions where the number of reference retransmissions corresponding to the same RTT duration range in the first correspondence is greater than or equal to the number of reference retransmissions corresponding to the second correspondence.
  • an apparatus for retransmitting data includes:
  • the determining module is used to obtain the RTT duration when it is detected that the data packet has been sent and stored in the cache, and determine the first data storage reference duration based on the RTT duration; based on the first data storage reference duration and the previous data packet storage The second data storage reference duration determined when entering the cache, to determine the data storage duration threshold;
  • a deletion module configured to delete a data packet that has been stored in the cache for more than the data storage duration threshold
  • the update module is used to update the RTT duration and go to the process of acquiring the RTT duration when it is detected that the data packet is sent and stored in the buffer.
  • the determination module is configured to:
  • the data storage duration threshold is determined based on the first data storage reference duration, the second data storage reference duration determined when the previous data packet was stored in the cache, and the pre-acquired reservation duration.
  • the determination module is configured to:
  • the second data storage reference duration is obtained in advance
  • the sum of the reserved time is determined as the data storage time threshold
  • first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference is greater than or equal to the second data storage reference duration, it is determined that the first data storage reference duration is equal to A duration difference between the second data storage reference durations, determining a product between the duration difference and a preset scale factor, and determining a sum between the product and the first data storage reference duration , The sum of the sum value and the reserved duration is determined as the data storage duration threshold;
  • the sum of the first data storage reference duration and the reserved duration is determined as a data storage duration threshold.
  • the determination module is also used to:
  • the reserved duration is determined based on the frame rate of the video frame to which the data packet belongs.
  • a system for retransmitting data includes a sending end and a receiving end, where:
  • the receiving end is used to send a retransmission request of the lost data packet to the sending end when a packet loss event is detected; obtain the RTT duration, determine the retransmission parameter threshold based on the RTT duration; During the transmission time, if the data packet is not received, the RTT time is updated, and the process of determining the retransmission parameter threshold based on the RTT time is performed; when the value of the retransmission parameter reaches the corresponding retransmission parameter threshold, if If the data packet is not received, stop sending the retransmission request of the data packet;
  • the sending end is used to obtain the RTT duration when it is detected that the data packet has been sent and stored in the cache, and determine the first data storage reference duration based on the RTT duration; based on the first data storage reference duration and the previous data
  • the second data storage reference duration determined when the packet is stored in the cache to determine the data storage duration threshold; deleting the data packets that have been stored in the cache for longer than the data storage duration threshold; updating the RTT duration , Go to the process of acquiring the RTT duration when it is detected that the data packet has been sent and stored in the buffer.
  • a receiving end includes a processor, a communication interface, a memory, and a communication bus, wherein:
  • the processor, the communication interface, and the memory complete communication with each other through the communication bus;
  • the memory is used to store computer programs
  • the processor is configured to execute the program stored on the memory to implement the method provided in the first aspect.
  • a computer-readable storage medium in which a computer program is stored.
  • the computer program is executed by a processor, the method provided in the first aspect described above is implemented.
  • a sending end includes a processor, a communication interface, a memory, and a communication bus, wherein:
  • the processor, the communication interface, and the memory complete communication with each other through the communication bus;
  • the memory is used to store computer programs
  • the processor is configured to execute the program stored on the memory to implement the method provided in the second aspect.
  • a computer-readable storage medium in which a computer program is stored, and when the computer program is executed by a processor, the method provided in the second aspect described above is implemented.
  • the threshold value of the retransmission parameter is adjusted in real time according to the correlation between the RTT duration and the network status. Due to the high correlation between the RTT duration and the network status, the RTT duration is longer under poor network conditions, and the RTT duration is shorter under better network conditions. Therefore, the RTT duration reflects the network status and then passes
  • the method of adjusting the retransmission parameter threshold according to the RTT duration can achieve the purpose of adjusting the retransmission parameter threshold in real time according to the network conditions.
  • the retransmission parameter reaches the retransmission parameter threshold, it stops sending the retransmission request to the initiator in time. In this way, the total retransmission time can be adjusted in real time according to the network conditions. In the case of poor network conditions, it is easier to shorten the total retransmission time by using the method provided in this embodiment, and avoid using a longer time to wait for lost packets. The flexibility of data transmission is better.
  • Fig. 1 is a schematic flowchart of a method for retransmitting data according to an exemplary embodiment
  • FIG. 2 is a schematic flowchart of a method for retransmitting data according to an exemplary embodiment
  • Fig. 3 is a schematic structural diagram of an apparatus for retransmitting data according to an exemplary embodiment
  • Fig. 4 is a schematic structural diagram of an apparatus for retransmitting data according to an exemplary embodiment
  • Fig. 5 is a schematic structural diagram of a computer device according to an exemplary embodiment.
  • An exemplary embodiment of the present disclosure provides a method for retransmitting data. As shown in FIG. 1, the processing flow of the method may include the following steps:
  • Step S110 When the receiving end detects a packet loss event, it sends a retransmission request for the lost data packet to the sending end.
  • the receiving end may determine the sequence number of the lost data packet based on the sequence number of the received data packet.
  • the receiving end stores the received data packets in the cache, and sorts the received data packets in the cache.
  • the receiving end Whenever the receiving end receives a data packet, it can obtain the sequence number N1 of the data packet. If the sequence number N1 is equal to the sequence number N2 of the expected data packet, the data packet with the sequence number N1 can be directly output to the subsequent data packet processing module for subsequent Processing, such as decoding processing.
  • the data packet with the sequence number N1 is a late data packet and can be directly discarded.
  • sequence number N1 is greater than the sequence number N2 of the expected data packet, and the sequence number N1 is less than or equal to the maximum sequence number N3 of the data packets stored in the cache, it can be determined whether there is a data packet with the sequence number N1 in the cache, if it does not exist, the sequence number is The data packets of N1 are inserted into the corresponding positions in the cache in sequence. At the same time, the data packets with the sequence number N1 are retransmission data packets or out-of-sequence data packets. Pass the data packet with sequence number N1.
  • sequence number N1 is greater than the sequence number N2 of the expected data packet, and the sequence number N1 is equal to the maximum sequence number N3+1 of the data packets stored in the cache, it is determined whether there is a data packet with the sequence number N1 in the cache, if it does not exist, the sequence number is N1
  • the data packets are inserted into the corresponding locations in the cache in order.
  • sequence number N1 is greater than the sequence number N2 of the expected data packet, and the sequence number N1 is greater than the maximum sequence number N3+1 of the data packets stored in the cache, it is determined whether there is a data packet with the sequence number N1 in the cache, if it does not exist, the sequence number is N1
  • the data packets are inserted into the corresponding positions in the cache in order.
  • the data packets with the sequence numbers N3+1 to N1-1 are lost data packets.
  • the heavy packets with the sequence numbers N3+1 to N1-1 can be constructed. Pass the request. After constructing the retransmission request for the lost data packet at the receiving end, you can wait 10 ms to eliminate the out-of-order data packets. After waiting for 10 ms, you can send the retransmission request for the missing data packet to the sending end.
  • step S120 the receiving end obtains the RTT duration, and determines the threshold of the retransmission parameter based on the RTT duration.
  • the receiving end may calculate the RTT duration according to the current network condition and a preset estimation algorithm according to a preset period such as 1s.
  • the value of the RTT duration indicates the expected time required for the retransmission request to return from the receiving end to the sending end and the sending end one round trip. In the case of poor network conditions, the RTT duration is longer, and in the case of better network conditions The RTT duration is shorter, and the specific method for calculating the RTT duration is specified in NPQ. You can use 500ms as the dividing line. If the RTT duration is greater than 500ms, you can consider the network condition to be extremely poor.
  • the receiving end may calculate the RTT duration according to a preset period, and determine the retransmission parameter threshold based on the RTT duration. Due to the high correlation between the RTT duration and the network status, the RTT duration is longer under poor network conditions, and the RTT duration is shorter under better network conditions. Therefore, the current RTT duration can be used to determine The current network condition determines the retransmission parameter threshold according to the current network condition. In this way, the threshold value of the retransmission parameter can be adjusted according to the current network condition, and the real-time performance is better, avoiding the use of a fixed threshold value of the retransmission parameter, and improving the flexibility of the data transmission process.
  • the threshold of the retransmission parameter may include a threshold of total retransmission consumption duration and a threshold of the number of retransmissions.
  • Step S130 when the retransmission time is reached after the retransmission request is sent, if the receiving end does not receive the data packet, the retransmission request for the data packet is sent to the sending end, the RTT duration is updated, and the execution is determined based on the RTT duration. Handling of parameter thresholds.
  • the retransmission duration is determined based on the RTT duration.
  • the retransmission duration may be the RTT duration plus a preset error duration such as 10ms.
  • the error duration is used to eliminate errors caused by factors such as thread start-up time and non-corresponding system time.
  • the receiving end After the receiving end sends the retransmission request to the sending end, it can be timed. If the retransmission time exceeds the receiving end and the data packet returned by the sending end has not been received, the retransmission request may not be able to arrive smoothly due to network reasons. The sending end, or the data packets sent by the sending end cannot reach the receiving end smoothly. At this time, the retransmission request can be sent again.
  • steps S120-S130 can be repeatedly performed to update the RTT duration and re-determine the retransmission parameter threshold until a certain value is met. Conditions so far.
  • Step S140 When the value of the retransmission parameter reaches the corresponding threshold of the retransmission parameter, if the receiving end does not receive the data packet, it stops sending the retransmission request of the data packet.
  • the retransmission parameters may include the total retransmission time or the number of retransmissions, or the retransmission parameters may include the total retransmission time and the number of retransmissions.
  • the threshold of the retransmission parameter corresponding to the total retransmission time is the threshold of the total retransmission time
  • the threshold of the retransmission parameter corresponding to the number of retransmissions is the threshold of the number of retransmissions.
  • the receiving end may stop repeating steps S120-S130. Or, when the number of retransmissions reaches the threshold of the number of retransmissions, if the receiving end does not receive the data packet, it may stop repeating steps S120-S130. At this time, it can be considered that the retransmission process has failed. Since the real-time data transmission requires high real-time performance of the data transmission, if any lost data packet cannot successfully reach the receiving end within a short time, it will no longer continue to wait for the lost data Packets, directly handle other data packets.
  • the threshold of the retransmission parameter is the threshold of the total retransmission time.
  • the method for determining whether the retransmission timed out may include: obtaining the RTT duration, and determining the product of the retransmission duration and the first reference number of retransmissions; The sum of the product and the preset reserved duration is the threshold of the total retransmission consumption duration.
  • the first reference retransmission number may be a preset fixed reference retransmission number, such as 10 times, or may be a reference retransmission number determined based on a correspondence between a preset RTT duration range and a reference retransmission number.
  • the receiving end Under the current network conditions, it is expected that if the receiving end never receives the data packet, it needs to send a retransmission request of the first reference retransmission number to the sending end. After each retransmission request, it needs to wait for the length of the retransmission before receiving
  • the total time the terminal needs to wait is the product of the retransmission time and the first reference retransmission times. Due to the possibility of out-of-order data packets, 10ms can be reserved as the length of time to wait for out-of-order data packets. In addition, considering other circumstances, different time lengths can also be reserved, and all the reserved time lengths are added together as the default Reserve time.
  • the sum of the total duration of the product that the receiving end needs to wait and the preset reserved duration can be determined and used as the threshold of the total retransmission consumption duration. If the lost data packet is the expected data packet, and the receiving end has not received the data packet after exceeding the threshold of the total retransmission time after sending the retransmission request of the lost data packet for the first time, it can be judged that the retransmission timed out, indicating Retransmission processing failed.
  • the threshold of the total retransmission time duration determined through steps S120-S130 also changes, but no matter how the threshold of the total retransmission time duration changes, as long as the retransmission is checked for timeout, the receiving end is determined After the first retransmission request for the lost data packet is sent and the data packet is not received when the current total retransmission time threshold is exceeded, it can be judged that the retransmission timed out and the retransmission processing failed.
  • the judgment conditions for judging whether the retransmission timed out can be adjusted in real time according to the network conditions, to avoid poor network conditions and to wait for a long time for lost packets, and improve the flexibility of data transmission .
  • the receiving end can check whether a retransmission times out every time a data packet is stored in the cache. In order to save processing overhead, it is not necessary to set a timer for the retransmission request separately to count down.
  • the length of the packet with the smallest sequence number in the cache stays in the cache to help determine whether the retransmission timed out, because the packet with the lowest sequence number in the cache is in The length of time spent in the cache is approximately equal to the total time spent on retransmissions.
  • the receiving end may not request the sending end to retransmit any lost data packets, because even if the sending end retransmits the lost data packets, the success rate is low and time-consuming Longer, real-time data transmission is extremely poor. Therefore, it can be determined whether the RTT duration is greater than the preset duration threshold, such as 500ms.
  • the total retransmission consumption duration threshold is directly set to the preset duration, such as 10ms, because the total retransmission consumption duration threshold is shorter . Within the shorter total retransmission duration threshold, all the lost packets cannot be successfully retransmitted, that is, the retransmission of all lost packets will time out, and it can reach the automatic retransmission request to stop sending all the lost packets Effect. If the RTT duration is less than or equal to 500 ms, the product of the RTT duration and the first reference retransmission number is determined, and the sum of the product and the preset reserved duration is determined as the total consumption duration threshold for retransmission.
  • the minimum sequence number of the data packet in the cache may be determined as the sequence number of the expected data packet. After the minimum sequence number of the data packet in the cache is determined as the sequence number of the expected data packet, if a data packet smaller than the sequence number of the expected data packet can be received, the received data packet is a late data packet, and it is directly discarded. can.
  • the method provided by the embodiment of the present disclosure may further include: determining the RTT to which the acquired RTT duration belongs based on the correspondence between the preset RTT duration range and the reference retransmission times The number of first reference retransmissions corresponding to the duration range.
  • the correspondence between the preset RTT duration range and the reference retransmission times may be a reference retransmission times mapping table, as shown in Table 1:
  • the first reference retransmission times corresponding to the RTT duration range to which the acquired RTT duration belongs can be determined by looking up Table 1. For example, if the current RTT duration is 80 ms, the first reference retransmission times are 4 times. If the receiving end sends 4 retransmission requests to the sending end, the total waiting time is 320 ms.
  • the main consideration is that, first, the larger the value of the RTT duration range, the fewer the number of retransmissions. In this way, when the network is in poor condition, fewer retransmission requests are sent to the sender. retrieve lost packets by means of retransmission. Secondly, the larger the value of the RTT duration range, the greater the threshold of the total retransmission consumption duration. Lastly, the sum of the total retransmission consumption duration thresholds corresponding to any two RTT duration ranges is less than or equal to the RTT update period, such as 1s.
  • the retransmission request of the data packet should also be stopped when the number of retransmissions reaches the threshold of the number of retransmissions.
  • the threshold of the retransmission parameter is a threshold of the number of retransmissions
  • a method for determining whether the number of times of retransmissions reaches the threshold of the number of retransmissions may include: acquiring an RTT duration, and retransmitting based on a preset RTT duration range and reference Correspondence of times, determine the second reference retransmission times corresponding to the RTT duration range to which the acquired RTT duration belongs; based on the comparison result of the second reference retransmission times and the third reference retransmission times determined when the retransmission request was sent last time To determine the threshold of retransmission times.
  • the threshold value of the number of retransmission times may be determined based on the comparison result of the second reference retransmission number and the third reference retransmission number determined when the retransmission request was previously sent.
  • the correlation between the size of the reference retransmission times and the network status is also high, so the current network status can also be reflected by the size of the retransmission times. The greater the number of retransmissions, the better the network condition. Conversely, the fewer the retransmissions, the worse the network condition.
  • the second reference retransmission number is determined as the retransmission number threshold.
  • the second reference retransmission times are the currently determined reference retransmission times. If the second reference retransmission times are equal to the previously determined third reference retransmission times, it means that the current network condition remains unchanged and the second reference retransmission times can be changed. Determined as the threshold for the number of retransmissions. If the second reference retransmission number is greater than the previously determined third reference retransmission number, it indicates that the current network condition is getting better, and the second reference retransmission number can be determined as the threshold of the retransmission number.
  • the duration that the receiving end can wait for the data packet can be updated to: retransmission consumed time + (current RTT duration + error duration) ⁇ ( The second reference number of retransmissions-the current number of retransmissions).
  • the retransmitted count is determined as the retransmission count threshold.
  • the second reference retransmission count is less than the third reference retransmission count, indicating that the current network condition has deteriorated, and the current retransmission count is greater than or equal to the second reference retransmission count, indicating that the current retransmission request has been retransmitted many times.
  • the threshold for the number of retransmissions can be set to the number of retransmissions, and the length of time that the receiving end can wait for a data packet is set to the length of time spent for retransmission. Since the current number of retransmissions has definitely reached the threshold of the number of retransmissions, the receiving end can automatically stop sending the retransmission request of the data packet to the sending end.
  • the second reference retransmission count is determined as the retransmission count threshold.
  • the second reference retransmission count is less than the third reference retransmission count, indicating that the current network condition has deteriorated, and the current retransmission count is less than the second reference retransmission count, indicating that the current retransmission count is insufficient.
  • the terminal retransmits several retransmission requests, and the threshold of the number of retransmissions may be set as the second reference number of retransmissions.
  • the duration that the receiving end can wait for the data packet can be updated to: retransmission consumed time + (current RTT duration + error duration) ⁇ ( The second reference number of retransmissions-the current number of retransmissions).
  • the number of reference retransmissions in Table 1 may be increased or Keep the same, so that if important data packets are lost, you can transmit several more important data packet retransmission requests to ensure the reliability of data transmission.
  • the RTT duration can be obtained.
  • the second corresponding to the RTT duration range to which the acquired RTT duration belongs is determined based on the first correspondence between the preset RTT duration range and the reference retransmission times Refer to the number of retransmissions; if the type of the data packet is not within the preset type set, then based on the second correspondence between the preset RTT duration range and the reference retransmission times, determine the number corresponding to the RTT duration range to which the acquired RTT duration belongs 2. Refer to the number of retransmissions.
  • the set of preset types may include encoding information data packet types, I frame data packet types, frame start data packet types, and the like.
  • the number of reference retransmissions corresponding to the same RTT duration in the first correspondence is greater than or equal to the number of reference retransmissions in the second correspondence.
  • the lost data packet is not an important data packet, you can refer to Table 1 to query the reference retransmission times corresponding to the RTT duration range to which the current RTT duration belongs. If the lost data packet is an important data packet, you can refer to Table 2 To query the number of reference retransmissions corresponding to the RTT duration range to which the current RTT duration belongs.
  • the threshold value of the retransmission parameter is adjusted in real time according to the correlation between the RTT duration and the network status. Due to the high correlation between the RTT duration and the network status, the RTT duration is longer under poor network conditions, and the RTT duration is shorter under better network conditions. Therefore, the RTT duration reflects the network status and then passes
  • the method of adjusting the retransmission parameter threshold according to the RTT duration can achieve the purpose of adjusting the retransmission parameter threshold in real time according to the network conditions.
  • the retransmission parameter reaches the retransmission parameter threshold, it stops sending the retransmission request to the initiator in time. In this way, the total retransmission time can be adjusted in real time according to the network conditions. In the case of poor network conditions, it is easier to shorten the total retransmission time by using the method provided in this embodiment, and avoid using a longer time to wait for lost packets. The flexibility of data transmission is better.
  • An exemplary embodiment of the present disclosure provides a method for retransmitting data. As shown in FIG. 2, the processing flow of the method may include the following steps:
  • Step S210 when the sending end detects that the data packet has been sent and stored in the buffer, the RTT duration is obtained, and based on the RTT duration, the first data storage reference duration is determined.
  • the sending end When the sending end detects that the data packet has been sent, it can store the data packet in the cache, in case the data packet is lost during transmission, and the data packet needs to be retransmitted.
  • the sent data packets need to be cleaned according to certain conditions, but they need to be kept as much as possible and may need to be retransmitted.
  • Data packets to improve the hit rate of retransmission requests Specifically, the storage duration of the data packet can be adjusted according to the network condition and the mechanism of the retransmission request sent by the receiving end.
  • the RTT duration can be obtained, and the product of the RTT duration and the target reference retransmission times can be determined as the first data storage reference duration.
  • the target number of reference retransmissions may be a preset fixed number of reference retransmissions, such as 10 times, or a reference retransmission number determined based on a correspondence between a preset RTT duration range and a reference retransmission number.
  • the sending end may determine the target reference retransmission corresponding to the RTT duration range to which the acquired RTT duration belongs based on the correspondence between the preset RTT duration range and the number of reference retransmissions frequency.
  • the correspondence between the preset RTT duration range and the reference retransmission times may be a reference retransmission times mapping table, as shown in Table 3:
  • the target reference retransmission times corresponding to the RTT duration range to which the acquired RTT duration belongs can be determined by looking up Table 3. For example, if the current RTT duration is 80 ms, the target reference retransmission times are 4 times, and the first data storage reference duration is 320 ms.
  • the main consideration is that, first, the larger the value of the RTT duration range, the fewer the number of retransmissions. In this way, when the network condition is not good, fewer retransmission requests are sent to the sender. retrieve lost packets by means of retransmission. Secondly, the larger the value of the RTT duration range, the greater the threshold of the total retransmission consumption duration. Lastly, the sum of the total retransmission consumption duration thresholds corresponding to any two RTT duration ranges is less than or equal to the RTT update period, such as 1s.
  • Step S220 The sending end determines the data storage duration threshold based on the first data storage reference duration and the second data storage reference duration determined when the previous data packet was stored in the cache.
  • the sending end can obtain the current RTT duration, determine the first data storage reference duration based on the current RTT duration, and determine the first data storage reference duration based on the first data storage reference duration and the second data storage reference duration determined when the previous data packet was stored in the cache, determine Data storage duration threshold.
  • step S220 may include determining the data storage duration based on the first data storage reference duration, the second data storage reference duration determined when the previous packet was stored in the cache, and the pre-acquired reservation duration Threshold.
  • the reserved duration can be set according to the situation.
  • the reserved duration can include the out-of-order data packet waiting duration such as 10 ms, and can also include the frame interval duration.
  • the frame interval duration may be determined according to the code rate corresponding to the video frame to which the current data packet belongs. For example, the bit rate corresponding to the video frame to which the current data packet belongs is 25 frames per second, then 25 video frames need to be transmitted in one second, and the frame interval between each video frame is 40 ms. For packets belonging to video frames with a low frame rate, if the frame interval duration is taken into consideration within the data storage duration threshold, the hit rate of the retransmission request can be improved.
  • the step of determining the data storage duration threshold based on the first data storage reference duration, the second data storage reference duration determined when the previous data packet was stored in the cache, and the pre-acquired reservation duration may be Including: calculating the time difference between the time point when the current data packet is stored in the cache and the time point when the previous data packet is stored in the cache; if the first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference If the value is less than the second data storage reference duration, the sum of the second data storage reference duration and the pre-obtained reserved duration is determined as the data storage duration threshold; if the first data storage reference duration is less than or equal to the second data storage reference duration , And the time difference is greater than or equal to the second data storage reference duration, determine the duration difference between the first data storage reference duration and the second data storage reference duration, and determine the difference between the duration difference and the preset scale factor Product, determine the sum of the product and the first data storage reference duration, and determine the sum of the sum and the
  • the first data storage reference duration is the data storage reference duration determined when the current data packet is stored in the cache
  • the second data storage reference duration is the data storage duration threshold determined when the previous data packet is stored in the cache. If the first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference is less than the second data storage reference duration, that is, the data storage reference duration is unchanged or shortened, and the previous data packet is stored in the cache If the determined data storage duration is not exhausted, you can still use the data storage duration threshold determined when the previous packet was stored in the cache, and the data storage duration threshold can be maintained as the second data storage reference duration and the pre-acquired reservation The sum of time.
  • the shortened data storage reference duration may not be temporarily selected as the data storage duration threshold, so that as many data packets in the cache as possible can be retained as much as possible, which can improve retransmission The requested hit rate.
  • the first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference is greater than or equal to the second data storage reference duration, that is, the data storage reference duration is unchanged or shortened, and the previous data packet is stored in the cache
  • the data storage duration determined when the previous packet is stored in the cache needs to be slowly reduced to the first data storage reference duration, and the first data storage reference duration and the second data can be determined
  • Store the duration difference between the reference durations determine the product of the duration difference and the preset scale factor, determine the sum of the product and the first data storage reference duration, and sum the sum with the reserved duration, Determined as the data storage duration threshold.
  • the first data storage reference duration is greater than the second data storage reference duration, that is, the data storage reference duration becomes longer, you can directly set the data storage duration threshold to the maximum data storage reference duration. You can set the first data storage reference duration to The sum of the reserved duration is determined as the threshold of the data storage duration.
  • Step S230 The sending end deletes the data packets that have been stored in the buffer for a time period that exceeds the data storage duration threshold.
  • the sending end can determine the current system time, subtract the data storage duration threshold from the current system time to obtain the data expiration time point, and delete all the data packets in the cache before the data expiration time point.
  • step S240 the sending end updates the RTT duration, and then proceeds to execute the process of acquiring the RTT duration when it is detected that the data packet has been sent and stored in the buffer.
  • the RTT duration is updated according to the period, so the RTT duration is not a fixed value, and the RTT duration can be updated each time a data packet is stored in the cache. You can obtain the current RTT duration to determine whether the current RTT duration is equal to the previous RTT duration. If the network status changes, the current RTT duration is not equal to the previous RTT duration. If the network status remains unchanged, the current RTT duration is equal to the previous RTT duration. After the RTT duration is updated, if the RTT duration changes, the first data storage reference duration also changes accordingly, so steps S210-S240 need to be repeated.
  • the storage duration of the data packet is adjusted according to the network condition and the mechanism of the retransmission request sent by the receiving end. In this way, the storage space of the cache can be appropriately saved, and at the same time, the hit rate of the retransmission request can be improved.
  • the apparatus includes:
  • the sending module 310 is configured to send a retransmission request for the lost data packet to the sending end when a packet loss event is detected;
  • the determining module 320 is used to obtain the RTT duration, and determine the threshold of the retransmission parameter based on the RTT duration;
  • the update module 330 is configured to send a retransmission request of the data packet to the sending end to update the RTT duration when the retransmission duration reaches the retransmission duration after the retransmission request is sent. To execute the process of determining the retransmission parameter threshold based on the RTT duration;
  • the stopping module 340 is configured to stop sending the retransmission request of the data packet if the value of the retransmission parameter reaches the corresponding threshold value of the retransmission parameter, if the data packet is not received.
  • the retransmission parameters include the total retransmission time and/or the number of retransmissions
  • the threshold of the retransmission parameter corresponding to the total retransmission time is the threshold of the total retransmission time and the number of retransmissions
  • the corresponding threshold of the retransmission parameter is the threshold of the number of retransmissions.
  • the threshold of the retransmission parameter is a threshold of total retransmission consumption duration
  • the determination module 320 is configured to:
  • the sum of the product and the preset reserved duration is determined as a total consumption duration threshold for retransmission.
  • the determination module 320 is also used to:
  • the threshold of the retransmission parameter is a threshold of the number of retransmissions
  • the determination module 320 is configured to:
  • the RTT duration and determine the second reference retransmission number corresponding to the RTT duration range to which the acquired RTT duration belongs based on the correspondence relationship between the preset RTT duration range and the reference retransmission times, wherein, in the correspondence, the RTT duration range The larger the value, the fewer the retransmission times;
  • the threshold value of the retransmission times is determined.
  • the determination module 320 is configured to:
  • the second reference retransmission number is greater than or equal to the previously determined third reference retransmission number, determine the second reference retransmission number as the retransmission number threshold;
  • the retransmission times are determined as a threshold of retransmission times
  • the second reference retransmission count is determined as the retransmission count threshold.
  • the determination module 320 is configured to:
  • the type of the data packet is in the preset type set, then based on the first correspondence between the preset RTT duration range and the reference retransmission times, determine the second reference weight corresponding to the RTT duration range to which the acquired RTT duration belongs Transmission times
  • the second corresponding to the RTT duration range to which the acquired RTT duration belongs Reference number of retransmissions where the number of reference retransmissions corresponding to the same RTT duration range in the first correspondence is greater than or equal to the number of reference retransmissions corresponding to the second correspondence.
  • the apparatus includes:
  • the determining module 410 is configured to obtain the RTT duration when it is detected that the data packet has been sent and stored in the cache, and determine the first data storage reference duration based on the RTT duration; based on the first data storage reference duration and the previous data packet The second data storage reference duration determined when stored in the cache, to determine the data storage duration threshold;
  • the deleting module 420 is configured to delete a data packet that has been stored in the cache for a duration that exceeds the data storage duration threshold;
  • the update module 430 is used to update the RTT duration and go to the process of acquiring the RTT duration when it is detected that the data packet has been sent and stored in the buffer.
  • the determination module 410 is configured to:
  • the data storage duration threshold is determined based on the first data storage reference duration, the second data storage reference duration determined when the previous data packet was stored in the cache, and the pre-acquired reservation duration.
  • the determination module 410 is configured to:
  • the second data storage reference duration is obtained in advance
  • the sum of the reserved time is determined as the data storage time threshold
  • first data storage reference duration is less than or equal to the second data storage reference duration, and the time difference is greater than or equal to the second data storage reference duration, it is determined that the first data storage reference duration is equal to A duration difference between the second data storage reference durations, determining a product between the duration difference and a preset scale factor, and determining a sum between the product and the first data storage reference duration , The sum of the sum value and the reserved duration is determined as the data storage duration threshold;
  • the sum of the first data storage reference duration and the reserved duration is determined as a data storage duration threshold.
  • the determination module 410 is also used to:
  • the reserved duration is determined based on the frame rate of the video frame to which the data packet belongs.
  • the threshold of the retransmission parameter is adjusted in real time according to the correlation between the RTT duration and the network status. Due to the high correlation between the RTT duration and the network status, the RTT duration is longer under poor network conditions, and the RTT duration is shorter under better network conditions. Therefore, the RTT duration reflects the network status and then passes
  • the method of adjusting the retransmission parameter threshold according to the RTT duration can achieve the purpose of adjusting the retransmission parameter threshold in real time according to the network conditions.
  • the retransmission parameter reaches the retransmission parameter threshold, it stops sending the retransmission request to the initiator in time. In this way, the total retransmission time can be adjusted in real time according to the network conditions. In the case of poor network conditions, it is easier to shorten the total retransmission time by using the device provided in this embodiment, avoiding the use of a longer time to wait for lost data packets. The flexibility of data transmission is better.
  • the device for retransmitting data provided in the above embodiments only uses the division of the above functional modules as an example for retransmission of data.
  • the above functions can be allocated by different functional modules as needed Completion means dividing the internal structure of the sending end and the receiving end into different functional modules to complete all or part of the functions described above.
  • the device for retransmitting data provided in the above embodiments and the method embodiment for retransmitting data belong to the same concept. For the specific implementation process, see the method embodiment, and details are not described here.
  • Yet another exemplary embodiment of the present disclosure provides a system for retransmitting data.
  • the system includes a sending end and a receiving end, where:
  • the receiving end is used to send a retransmission request of the lost data packet to the sending end when a packet loss event is detected; obtain the RTT duration, determine the retransmission parameter threshold based on the RTT duration; During the transmission time, if the data packet is not received, send a retransmission request of the data packet to the sending end, update the RTT duration, and proceed to perform the process of determining the retransmission parameter threshold based on the RTT duration; When the value of the retransmission parameter reaches the corresponding threshold of the retransmission parameter, if the data packet is not received, stop sending the retransmission request of the data packet;
  • the sending end is used to obtain the RTT duration when it is detected that the data packet has been sent and stored in the cache, and determine the first data storage reference duration based on the RTT duration; based on the first data storage reference duration and the previous data
  • the second data storage reference duration determined when the packet is stored in the cache to determine the data storage duration threshold; deleting the data packets that have been stored in the cache for longer than the data storage duration threshold; updating the RTT duration , Go to the process of acquiring the RTT duration when it is detected that the data packet has been sent and stored in the buffer.
  • FIG. 5 shows a schematic structural diagram of a computer device 1900 provided by an exemplary embodiment of the present disclosure.
  • the computer device 1900 may be a sending end or a receiving end in the foregoing embodiments, and may have a relatively large difference due to different configurations or performances, and may include one or more processors (central processing units 1910) and one or more The above memory 1920.
  • processors central processing units 1910
  • the above memory 1920 may include one or more processors (central processing units 1910) and one or more The above memory 1920.
  • processors central processing units 1910
  • the above memory 1920 wherein, at least one instruction is stored in the memory 1920, and the at least one instruction is loaded and executed by the processor 1910 to implement the method for retransmitting data described in the foregoing embodiment.

Landscapes

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

Abstract

La présente invention concerne un procédé, un dispositif et un système de retransmission de données, appartenant au domaine de la technologie de transmission de données. Ledit procédé consiste : lors de la détection d'un événement de perte de paquet, à envoyer, à une extrémité d'envoi, une requête de retransmission d'un paquet de données perdu ; à acquérir un RTT, et à déterminer, sur la base du RTT, un seuil de paramètre de retransmission ; et lorsqu'une durée de retransmission s'est écoulée depuis que la requête de retransmission a été envoyée, si aucun paquet de données n'est reçu, à envoyer, à l'extrémité d'envoi, une requête de retransmission du paquet de données, à mettre à jour le RTT, et à procéder au processus de détermination du seuil de paramètre de retransmission sur la base du RTT ; et lorsque la valeur numérique du paramètre de retransmission atteint le seuil de paramètre de retransmission correspondant, si aucun paquet de données n'est reçu, à arrêter l'envoi d'une requête de retransmission du paquet de données. La présente invention peut facilement raccourcir le temps total utilisé par retransmission, éviter une longue période d'attente d'un paquet de données perdu, et améliorer la flexibilité de transmission de données.
PCT/CN2019/126073 2018-12-17 2019-12-17 Procédé, dispositif et système de retransmission de données WO2020125647A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811544881.8A CN111327402B (zh) 2018-12-17 2018-12-17 重传数据的方法、装置和系统
CN201811544881.8 2018-12-17

Publications (1)

Publication Number Publication Date
WO2020125647A1 true WO2020125647A1 (fr) 2020-06-25

Family

ID=71102554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/126073 WO2020125647A1 (fr) 2018-12-17 2019-12-17 Procédé, dispositif et système de retransmission de données

Country Status (2)

Country Link
CN (1) CN111327402B (fr)
WO (1) WO2020125647A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112769526A (zh) * 2020-12-11 2021-05-07 邦彦技术股份有限公司 数据包重传方法、系统和存储介质
CN113014547A (zh) * 2021-01-29 2021-06-22 深圳市风云实业有限公司 一种基于排序映射的直通数据传输系统及方法
CN113392667A (zh) * 2021-08-17 2021-09-14 深圳市成为信息技术有限公司 一种读写器的数据传输方法、数据接收器及存储介质
CN113422923A (zh) * 2021-06-22 2021-09-21 苏州市科远软件技术开发有限公司 重传次数的确定方法、装置、电子设备及存储介质
CN113839830A (zh) * 2021-07-15 2021-12-24 腾讯科技（深圳）有限公司 数据包多发参数的预测方法、装置与存储介质
CN114531210A (zh) * 2022-02-03 2022-05-24 百果园技术(新加坡)有限公司 数据重传方法、装置、电子设备及存储介质
CN115276916A (zh) * 2022-07-22 2022-11-01 上海百家云科技有限公司 一种丢弃数据的确定方法、装置、电子设备及存储介质
CN116137560A (zh) * 2023-04-14 2023-05-19 海马云（天津）信息技术有限公司 处理重传请求的方法及装置、数据发送端设备和存储介质
WO2024125098A1 (fr) * 2022-12-13 2024-06-20 华为技术有限公司 Procédé et appareil de transmission de données, et dispositif et support de stockage lisible par ordinateur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114095796A (zh) * 2020-07-30 2022-02-25 中国移动通信集团终端有限公司 无效重传包减少方法、装置、设备及计算机存储介质
CN112887063B (zh) * 2021-01-19 2023-04-07 网易（杭州）网络有限公司 数据包传输方法和装置、存储介质、电子设备
CN117318898B (zh) * 2023-11-24 2024-02-09 合肥奎芯集成电路设计有限公司 高速串行接口中重复数据包的处理方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101146341A (zh) * 2006-09-12 2008-03-19 华为技术有限公司 一种媒体无关切换中避免重复执行事务的方法及装置
CN101222311A (zh) * 2008-01-29 2008-07-16 杭州华三通信技术有限公司 实时报文丢包恢复方法、系统及接收端单元
WO2016115916A1 (fr) * 2015-01-23 2016-07-28 中兴通讯股份有限公司 Procédé et appareil de retransmission de paquets de données

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101321116A (zh) * 2007-06-05 2008-12-10 华为技术有限公司 终端设备及根据授权传输调度数据的方法
CN101252425B (zh) * 2008-04-09 2010-10-27 杭州华三通信技术有限公司 一种自动适应网络的丢包纠错方法和系统
US20160094462A1 (en) * 2014-09-26 2016-03-31 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for dynamically adjusting retransmission timing in a transport layer
CN106130693B (zh) * 2016-07-08 2019-04-23 浙江工业大学 一种基于udp的可靠传输方法
CN108540273B (zh) * 2017-03-01 2021-08-13 杭州海康威视数字技术股份有限公司 一种数据包重传的方法和装置
CN107147481A (zh) * 2017-07-19 2017-09-08 北京数码视讯科技股份有限公司 丢包重传方法、装置及电子设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101146341A (zh) * 2006-09-12 2008-03-19 华为技术有限公司 一种媒体无关切换中避免重复执行事务的方法及装置
CN101222311A (zh) * 2008-01-29 2008-07-16 杭州华三通信技术有限公司 实时报文丢包恢复方法、系统及接收端单元
WO2016115916A1 (fr) * 2015-01-23 2016-07-28 中兴通讯股份有限公司 Procédé et appareil de retransmission de paquets de données

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112769526A (zh) * 2020-12-11 2021-05-07 邦彦技术股份有限公司 数据包重传方法、系统和存储介质
CN113014547A (zh) * 2021-01-29 2021-06-22 深圳市风云实业有限公司 一种基于排序映射的直通数据传输系统及方法
CN113014547B (zh) * 2021-01-29 2022-11-01 深圳市风云实业有限公司 一种基于排序映射的直通数据传输系统及方法
CN113422923A (zh) * 2021-06-22 2021-09-21 苏州市科远软件技术开发有限公司 重传次数的确定方法、装置、电子设备及存储介质
CN113839830B (zh) * 2021-07-15 2023-10-24 腾讯科技（深圳）有限公司 数据包多发参数的预测方法、装置与存储介质
CN113839830A (zh) * 2021-07-15 2021-12-24 腾讯科技（深圳）有限公司 数据包多发参数的预测方法、装置与存储介质
CN113392667A (zh) * 2021-08-17 2021-09-14 深圳市成为信息技术有限公司 一种读写器的数据传输方法、数据接收器及存储介质
CN113392667B (zh) * 2021-08-17 2021-11-30 深圳市成为信息技术有限公司 一种读写器的数据传输方法、数据接收器及存储介质
CN114531210A (zh) * 2022-02-03 2022-05-24 百果园技术(新加坡)有限公司 数据重传方法、装置、电子设备及存储介质
CN114531210B (zh) * 2022-02-03 2024-01-26 百果园技术(新加坡)有限公司 数据重传方法、装置、电子设备及存储介质
CN115276916A (zh) * 2022-07-22 2022-11-01 上海百家云科技有限公司 一种丢弃数据的确定方法、装置、电子设备及存储介质
WO2024125098A1 (fr) * 2022-12-13 2024-06-20 华为技术有限公司 Procédé et appareil de transmission de données, et dispositif et support de stockage lisible par ordinateur
CN116137560A (zh) * 2023-04-14 2023-05-19 海马云（天津）信息技术有限公司 处理重传请求的方法及装置、数据发送端设备和存储介质
CN116137560B (zh) * 2023-04-14 2023-06-30 海马云（天津）信息技术有限公司 处理重传请求的方法及装置、数据发送端设备和存储介质

Also Published As

Publication number Publication date
CN111327402B (zh) 2021-12-31
CN111327402A (zh) 2020-06-23

Similar Documents

Publication Publication Date Title
WO2020125647A1 (fr) Procédé, dispositif et système de retransmission de données
CN109936510B (zh) 多路径rdma传输
KR102109021B1 (ko) 데이터 전송 방법, 전송 노드, 수신 노드 및 데이터 전송 시스템
CN111786748B (zh) 数据重传方法和系统、网卡、装置、服务器和存储介质
US11251911B2 (en) Data transmission method and related device
JP4932008B2 (ja) 輻輳を低減させる高信頼性パケット送信のための方法、システム、およびコンピュータ・プログラム・コード（輻輳を低減させる高信頼性転送パケ
CN108234087B (zh) 数据传输方法及发送端
CN103957169A (zh) 一种基于反向请求的可靠udp的实现方法
US20140108878A1 (en) Method, Apparatus, and System for Retransmitting Data Packet in Quick Path Interconnect System
CN110247736B (zh) 一种数据传输方法及装置
WO2023147772A1 (fr) Procédé et appareil de retransmission de données, dispositif, et support de stockage
CN112261142B (zh) 一种rdma网络的数据重传方法、装置及fpga
CN113014505A (zh) 一种高动态拓扑卫星网络中时延区分的传输控制方法
CN113852445B (zh) 一种提高数据传输可靠性的方法、系统、设备和存储介质
CN114390054A (zh) 一种核心网网络加速方法、电子设备及计算机存储介质
CN109586931B (zh) 组播方法及终端设备
EP3749043A1 (fr) Procédé et appareil de détection de perte de paquet de liaison, support de stockage et processeur
CN111314961A (zh) Tcp传输方法、装置和系统
CN116318545A (zh) 视频数据传输方法、装置、设备及存储介质
US9172654B2 (en) Transfer device and transfer method
CN111385069A (zh) 数据传输方法及计算机设备
US11424864B2 (en) Data packet retransmission method and apparatus
CN115001632A (zh) 一种信息传输方法、装置、电子设备及可读存储介质
CN117938980B (zh) 应用于内容分发网络的数据传输方法、装置、设备及介质
JP3732671B2 (ja) 送信装置、送信方法、及び送信用ソフトウェアを記録した記録媒体

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19900353

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19900353

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 04.01.2022)

122 Ep: pct application non-entry in european phase

Ref document number: 19900353

Country of ref document: EP

Kind code of ref document: A1