WO2017097201A1 - Procédé de transmission de données, dispositif de transmission et dispositif de réception - Google Patents

Procédé de transmission de données, dispositif de transmission et dispositif de réception Download PDF

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Publication number
WO2017097201A1
WO2017097201A1 PCT/CN2016/108902 CN2016108902W WO2017097201A1 WO 2017097201 A1 WO2017097201 A1 WO 2017097201A1 CN 2016108902 W CN2016108902 W CN 2016108902W WO 2017097201 A1 WO2017097201 A1 WO 2017097201A1
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Prior art keywords
packet
identifier
packets
data stream
receiving end
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PCT/CN2016/108902
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English (en)
Chinese (zh)
Inventor
林俊如
何健飞
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华为技术有限公司
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Publication of WO2017097201A1 publication Critical patent/WO2017097201A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/19—Flow control; Congestion control at layers above the network layer
    • H04L47/193—Flow control; Congestion control at layers above the network layer at the transport layer, e.g. TCP related
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/23—Bit dropping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2466—Traffic characterised by specific attributes, e.g. priority or QoS using signalling traffic

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, a transmitting device, and a receiving device.
  • the Transmission Control Protocol is a connection-oriented, reliable, byte stream-based transport layer communication protocol.
  • TCP Transmission Control Protocol
  • the subsequent packet transmission can trigger fast retransmission, so that the sender can retransmit the lost packet in time.
  • RTO Retransmission Timeout
  • the embodiment of the invention provides a data transmission method, a sending device and a receiving device, which help to reduce the delay caused by timeout retransmission and the completion time of the task.
  • a first aspect of the embodiments of the present invention provides a data transmission method, including:
  • the sending end obtains the first packet in the data stream, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify that the second packet is N.
  • the N packets are N packets before the data stream is transmitted, and N is greater than 0 and smaller than the number of packets of the data stream; the sending end sends the first packet to the receiving end.
  • the first packet is obtained by adding the first identifier to the second packet, and the first identifier is used to identify the first packet.
  • the N packets before the transmission are completed for the data stream, and the first packet is sent to the receiving end. Therefore, when the data stream is sent, the transmitting end can identify the N packets before the data stream is transmitted.
  • the obtaining, by the sending end, the first packet in the data stream includes:
  • the sending end determines, according to the second identifier carried in the second packet, that the second packet belongs to the N packets, and the second identifier is used to identify the second packet in the data. a location in the stream; the sender adds the first identifier to the second packet, and obtains the first packet.
  • the first identifier is carried in the DCP of the first packet. a field; or the first identifier is carried in an option number field of the first packet.
  • the first identifier may be an identifier on the 5th bit of the DSCP field.
  • the first identifier may be a predetermined number in an option number field.
  • a second aspect of the embodiments of the present invention provides a data transmission method, including:
  • the receiving end receives the first packet from the sending end, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify that the second packet is N
  • the message in the message, the N packets are N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the number of packets in the data stream;
  • the first packet is processed according to the packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • the receiving end after receiving the first packet with the first identifier from the sending end, processes the first packet according to the processing manner adopted by the first packet in the packet transmission policy. Process it. It can be seen that the receiving end processes the processing mode of the packet carrying the first identifier, and does not carry The processing of the packet with the first identifier is different. Therefore, the processing mode is more flexible, and the requirement for reducing the packet loss rate of the N packets before the data stream is completed is reduced, thereby reducing the transmission of the data stream. The timeout retransmission caused by the loss of the first N packets shortens the task completion time.
  • the receiving by the receiving end, processing the first packet according to a packet transmission policy
  • the receiving end preferentially discards the received packet that does not carry the first identifier after the received packet queue corresponding to the data stream exceeds the first threshold.
  • the packet queue corresponding to the received data stream exceeds the first threshold, for example, when the network device needs to discard the packet due to congestion or traffic restriction, the device does not carry the packet.
  • the packet of the first identifier is used to reduce the packet loss rate of the N packets before the data stream carrying the first identifier is completed.
  • the receiving end preferentially discarding the received packet that does not carry the first identifier includes:
  • the receiving end obtains a first parameter according to the first identifier and the corresponding relationship, where the corresponding relationship includes the first identifier and the first parameter, where the first parameter includes a second threshold and a discarding probability, where The drop probability is used to indicate the percentage of the operation of discarding the message; the receiving end receives the carried port according to the discard probability after the received message queue corresponding to the data stream exceeds the second threshold.
  • the packet with the first identifier is discarded.
  • the first packet carrying the first identifier has a higher second threshold and a lower discarding probability than the packet that does not carry the first identifier, thereby reducing the first packet. Packet loss rate.
  • the receiving, by the receiving end, processing the first packet according to the packet transmission policy includes:
  • the receiving end copies the first packet, and obtains the M first packets, where the M is an integer greater than or equal to 2; the receiving end sends the M first packets Send to the wireless terminal.
  • the M packets are sent to the wireless terminal, the packet loss rate of the first packet is reduced, and the packet transmitted before the first packet in the data stream is used. If the M message is successfully transmitted, the receiving end receives the confirmation message returned by the wireless terminal. After that, the receiving end can trigger the retransmission of the lost packet by fast retransmission to avoid the occurrence of timeout retransmission.
  • the M is a value determined according to a default value of the number of copies of the message; or the M is The number of accesses is the number of wireless terminals that have accessed the receiving end according to the number of accesses and/or the value determined by the link quality between the receiving end and the wireless terminal.
  • the N is greater than 1, the method further includes:
  • the receiving end receives the third packet from the sending end, where the third packet is a packet with a first identifier added to the fourth packet, where the first identifier is used to identify the fourth packet.
  • the message is a message in the N packets, where the N packets are N packets before the data stream to which the second packet belongs, and the receiving end sends the message to the wireless terminal.
  • Three messages In the embodiment of the present invention, after receiving the first received packet carrying the first identifier, the receiving end does not copy the subsequently received packet carrying the first identifier, thereby reducing the receiving end and the wireless terminal. The link between the burden.
  • the first identifier is carried in the a differentiated service code point DSCP field of the first packet; or the first identifier is carried in an option number field of the first packet.
  • the first identifier may be an identifier on the 5th bit of the DSCP field.
  • the first identifier may be a predetermined number in an option number field.
  • a third aspect of the embodiments of the present invention provides a sending apparatus, including:
  • An obtaining unit configured to obtain a first packet in the data stream, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify the second packet
  • the message is a message in the N packets, where the N packets are N packets before the data stream is transmitted, and N is greater than 0 and less than The number of packets of the data stream;
  • a sending unit configured to send the first packet to the receiving device.
  • the obtaining unit is specifically configured to:
  • a fourth aspect of the embodiments of the present invention provides a receiving apparatus, including:
  • a first receiving unit configured to receive a first packet from the sending end, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify the second packet
  • the message is a packet of the N packets, and the N packets are N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the packet of the data stream.
  • the processing unit is configured to process the first packet according to a packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • the processing unit is specifically configured to:
  • the received packet queue corresponding to the data flow exceeds the first threshold, the received packet that does not carry the first identifier is preferentially discarded.
  • the processing unit is specifically configured to:
  • the discard probability Indicates the percentage of operations that perform packet discarding
  • the received packet queue corresponding to the data stream exceeds the second threshold, the received packet that does not carry the first identifier is discarded according to the discarding probability.
  • the processing unit is specifically configured to:
  • the M is a value determined according to a default value of the number of copies of the message.
  • the M is a value determined according to the number of accesses and/or the quality of the link between the receiving end and the wireless terminal, and the number of accesses is the number of wireless terminals that have accessed the receiving end.
  • the device is greater than 1, the device further includes:
  • a second receiving unit configured to receive a third packet from the sending end, where the third packet is a packet that adds a first identifier to the fourth packet, where the first identifier is used to identify the
  • the fourth packet is a packet of the N packets, and the N packets are N packets before the data stream to which the second packet belongs.
  • a sending unit configured to send the third packet to the wireless terminal.
  • a fifth aspect of the embodiments of the present invention provides a transmitting end, including: a processor, a transmitter, and a communication bus; wherein the processor and the transmitter complete communication with each other through the communication bus;
  • the processor is used to:
  • the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify that the second packet is N packets.
  • the N packets are N packets before the data stream is transmitted, and N is greater than 0 and smaller than the number of packets in the data stream;
  • the transmitter is used to:
  • the processor is specifically configured to:
  • the second identifier is used to identify a location of the second packet in the data stream
  • a sixth aspect of the embodiments of the present invention provides a receiving end, including: a processor, a receiver, a transmitter, and a communication bus; wherein the receiver, the transmitter, and the processor are completed by using the communication bus Communication with each other;
  • the receiver is used to:
  • the N packets are N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the number of packets in the data stream; :
  • the first packet is processed according to a packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • the processor is specifically configured to:
  • the received packet queue corresponding to the data flow exceeds the first threshold, the received packet that does not carry the first identifier is preferentially discarded.
  • the processor is specifically configured to:
  • the discard probability Indicates the percentage of operations that perform packet discarding
  • the received packet queue corresponding to the data stream exceeds the second threshold, the received packet that does not carry the first identifier is discarded according to the discarding probability.
  • the processor is specifically configured to:
  • the transmitter is used to:
  • the M is a value determined according to a default value of the number of copies of the message.
  • the M is a value determined according to the number of accesses and/or the quality of the link between the receiving end and the wireless terminal, and the number of accesses is the number of wireless terminals that have accessed the receiving end.
  • the receiver is specifically configured to:
  • the third packet is configured to receive the third packet from the sending end, where the third packet is a packet that is added with the first identifier in the fourth packet, where the first identifier is used to identify that the fourth packet is a message in the N packets, where the N packets are N packets before the data stream to which the second packet belongs;
  • the transmitter is specifically configured to:
  • the sending end obtains the first packet in the data stream, and the first packet is the first packet, and the first packet is sent to the receiving end.
  • the first packet is one of the N packets before the data stream is transmitted.
  • the receiving end processes the first packet according to the packet transmission policy. Processing the first packet to make the processing mode more flexible, and satisfying the requirement that the receiving end reduces the packet loss rate of the N packets before the data stream is completed, thereby reducing the data stream before the transmission is completed.
  • the loss of N packets that is, the timeout retransmission caused by the loss of the last packet of the data stream, shortens the task completion time.
  • Figure 1 is a schematic diagram of a data center
  • FIG. 2 is a schematic diagram of a metropolitan area network
  • FIG. 3 is a flowchart of a method for transmitting data by a transmitting device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of timeout retransmission due to packet loss in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a first implementation manner of setting a first identifier according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a second implementation manner of setting a first identifier according to an embodiment of the present disclosure
  • FIG. 7 is a flowchart of a method for transmitting data by a receiving device according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a transmission process of a packet carrying a first identifier in a data center according to an embodiment of the present disclosure
  • FIG. 9 is a flowchart of a method for a receiving device to perform a second processing manner on a packet carrying a first identifier according to an embodiment of the present disclosure
  • FIG. 10 is a schematic diagram of a transmission process of a packet carrying a first identifier in a metropolitan area network according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of functional modules of a sending apparatus according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of hardware of a transmitting end according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of functional modules of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of hardware of a receiving end according to an embodiment of the present invention.
  • the embodiment of the present invention provides a data transmission method, a sending device, and a receiving device, which are used to solve the problem in the prior art.
  • a lost packet occurs at the end of the TCP stream, a timeout retransmission may occur, which may result in Technical issues with extended mission completion time.
  • FIG. 1 is a schematic diagram of a data center.
  • the data center includes multiple servers, top of Rack (Tor) switches.
  • the data center also includes core switches and aggregation switches.
  • the Tor switch causes TCP incast due to many-to-one communication. problem.
  • the TCP incast problem refers to the data center network.
  • packet loss occurs at the Tor switch, and the policy used for packet loss is random discard. That is, N packets before the data stream is transmitted may be discarded by the Tor switch, resulting in timeout retransmission. .
  • the core ports of the data center, the uplink ports of the aggregation switch and the Tor switch, such as the ports that the Tor switch communicates with the aggregation switch, do not cause congestion. If the congestion occurs, the solution provided in the embodiment of the present invention may also be used.
  • FIG. 2 is a schematic diagram of a metropolitan area network.
  • some network devices limit traffic according to users, resulting in packet loss, such as Broadband Network Gateway (BNG).
  • BNG Broadband Network Gateway
  • the BNG will limit traffic according to the user, if the rate of receiving packets is far greater than the available bandwidth of the user, packet loss will occur at the BNG, and the policy used for packet loss is random discard, that is, the data stream is completed. N packets before transmission may be discarded by the BNG, resulting in timeout retransmission.
  • WIFI AP Wireless Fidelity Access Point
  • HGW home gateway
  • ONT optical network terminal
  • CM cable modem
  • the destination of the WIFI AP is the wireless terminal that accesses the network through the WIFI.
  • the radio link feature may also cause more packet loss, which may result in the loss of N packets before the data stream is transmitted.
  • the generation of the biography The data transmission method provided by the embodiment of the present invention is described in detail below.
  • the transmitting end may be the server 1 in FIG. 1; the receiving end may be the Tor switch in FIG. 1 or the BNG in FIG. 2 .
  • the method includes the following:
  • the sending end obtains the first packet in the data stream, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify the second packet.
  • the N packets are N packets before the data stream is transmitted, and N is greater than 0 and smaller than the number of packets in the data stream.
  • the sending end sends the first packet to a receiving end.
  • the sending end may determine, according to the second identifier carried in the second packet, that the second packet belongs to the N packets, and the second identifier is used to identify the second packet.
  • the sender can determine, according to the value of the field number carried in the packet in the data stream, that the second packet belongs to the N packets before the data stream is transmitted. Then, the sending end adds a first identifier to the second packet to obtain the first packet.
  • the sending end inserts the received second packet into the queue to which it belongs according to the sequence of the received packets, and determines that the second packet belongs to the N according to the ranking of the queue. Messages. In this way, the transmitting end does not need to identify the second identifier of each received message and determine whether it is N packets, which helps to further reduce overhead and save time.
  • the specific value of N may be a preset value, and the value of N may be set to be any value greater than 0 and smaller than the number of packets of the data stream.
  • the specific value of N is set according to the number of triggering timeout retransmission confirmation characters (Acknowledgement, ack). For example, as shown in FIG.
  • the following describes how the sender adds the first identifier to the second packet.
  • a possible implementation manner is: carrying the first identifier in a Differentiated Services Code Point (DSCP) field of the packet.
  • DSCP Differentiated Services Code Point
  • IPv4 Internet Protocol version 4
  • the sender will be in the DSCP field. If the fifth bit is set to the identifier 1, the fifth bit of the DSCP field of the packet is the identifier 1, indicating that the packet is one of the N packets before the data stream is transmitted.
  • the fifth bit of the Assured Forwarding (AF) hop-by-hop behavior (PHB) packet and the Expedited Forwarding (EF) PHB packet are all 0, as the code recommended by AF is shown in Table 1.
  • Table 1 shows the three drop priorities for each class in the AF, along with the recommended DSCP associated with each priority.
  • Each DSCP is represented by its AF value, decimal value, and binary value, respectively.
  • the fifth bit in the DSCP field sets the identifier 1 to indicate that the packet is one of the N packets before the data stream is completed.
  • Another possible implementation manner is: carrying the first identifier in an option number field of the first packet.
  • the sender can set the option number field in the option of the packet header of the packet to a predetermined number. If the number of the message in the option number field is a predetermined number, it indicates that the message data stream completes one of the N messages before the transmission.
  • the IPV4Options field is represented by one byte and contains three fields: a 1-bit copied flag, a 2-bit option class, and a 5-bit option number. .
  • a 1-bit copied flag In order to identify the first message, one of the possible extensions is shown in FIG. 6.
  • the predetermined number of the option number field is expressed as 27 in decimal notation and 11011 in binary.
  • the predetermined number used as the first identifier should be different from other currently defined numbers.
  • the number 27 is a number that is not defined, and the predetermined number can be defined as 27.
  • the method includes:
  • the receiving end receives the first packet from the sending end, where the first packet is a packet that adds the first identifier to the second packet, where the first identifier is used to identify that the second packet is A packet of the N packets, the N packets being N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the number of packets of the data stream.
  • the transmitting end sends the first packet with the first identifier added to the data stream to the receiving end by performing the method shown in FIG. Therefore, the receiving end can receive the first packet in the data stream sent by the sending end.
  • the receiving end processes the first packet according to a packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • the packet transmission policy includes a processing manner adopted by the first packet.
  • the receiving end In the first processing mode, the receiving end generates congestion or limits the flow of the user.
  • the packet needs to be discarded the first identifier in the packet is identified, and the packet carrying the first identifier is preferentially discarded.
  • the first packet carrying the first identifier is copied and the plurality of the first packet is sent by identifying the first identifier in the WIFI AP in the home network.
  • the receiving end may be the Tor switch in FIG. 1 or the BNG in FIG. 2.
  • the method includes: after receiving the received packet queue of the data stream, the receiving end preferentially discards the received packet that does not carry the first identifier.
  • the first threshold is the number of packets in the packet queue before the receiver is ready to discard the packet.
  • the first threshold may be a length of a preset message queue.
  • a possible implementation manner is as follows: the receiving end determines whether the packet is a packet to be discarded according to the discarding probability; wherein the discarding probability is a percentage of the operation of discarding the packet.
  • the size of the discard probability is proportional to the length of the packet queue; if the packet to be discarded is the first packet carrying the first identifier, the first packet is not discarded; If the packet to be discarded is not If the first identifier is carried, the packet is discarded.
  • the random early drop (RED) algorithm can be used to determine whether the packet is a packet to be discarded, or other algorithms can be used.
  • the RED algorithm is used as an example.
  • the packet discarding probability is randomly determined by the discarding probability. As the queue length increases, the probability of packet discarding increases. .
  • the packet is determined to be a packet to be discarded by the RED algorithm, if the packet to be discarded does not carry the first identifier, the packet is discarded; if the packet to be discarded carries the first identifier, the packet is not discarded. The message.
  • the receiving end obtains a first parameter according to the first identifier and the corresponding relationship, where the corresponding relationship includes the first identifier and the first parameter, and the first parameter
  • the second threshold and the discarding probability are used, and the discarding probability is used to indicate the percentage of the operation of discarding the message; the receiving end, after the received packet queue corresponding to the data stream exceeds the second threshold, according to the The discarding probability discards the received packet carrying the first identifier.
  • the second threshold is a length of a preset queue, such as a minimum threshold of a queue length.
  • the second threshold may be the same as the first threshold or may be different from the first threshold.
  • the first identifier is an identifier of a DSCP field that is set in the first packet
  • the first parameter is a packet discarding parameter corresponding to the first identifier, where the first parameter includes a second threshold and a discard probability, and the second threshold The number of packets in the packet queue before the packet is discarded.
  • the discarding probability is used to indicate the percentage of the packet discarding operation.
  • the weighted random early detection (WRED) algorithm can be used to discard the packet carrying the first identifier.
  • the WRED algorithm is used according to the quality of service (Quality of Service, QoS) priority classifies messages into corresponding categories.
  • Each category corresponds to a discarding policy.
  • Each discarding policy has its own packet discarding parameters, including: a second threshold and a discarding probability.
  • the receiving end discards the packets of the class according to the packet discarding parameters corresponding to each category.
  • the DSCP field may be mapped to the QoS priority of the first packet by setting the identifier 1 in the fifth bit of the DSCP field of the first packet.
  • the QoS priority of the packet carrying the first identifier is lower than that of the non-portable packet.
  • the QoS priority of an identified message is one level higher. For example, in a data stream, the DSCP field of the packet carrying the first identifier is "001100", and the DSCP field of the packet carrying the first identifier is "001101", and the packet carrying the first identifier is carried.
  • the QoS priority is one level higher than the QoS priority of the message that does not carry the first identifier. Moreover, the packet with a higher priority corresponds to a higher second threshold and a lower discarding probability than the packet with a lower priority. Therefore, it is possible to preferentially discard packets that do not carry the first identifier.
  • the server 1 sets a first identifier in the N packets before the data stream sent to the Tor switch completes the transmission, and sends the N packets to the Tor switch.
  • the Tor switch After receiving the packet in the data stream, the Tor switch identifies the packet carrying the first identifier, and discards the packet that does not carry the first identifier when the packet is discarded by the Tor switch.
  • the Tor switch sends the packet carrying the first identifier to the server 2.
  • the second processing method includes:
  • the receiving end copies the first packet, and obtains the M first packets, where the M is an integer greater than or equal to 2.
  • the receiving end sends the M first messages to a wireless terminal.
  • the receiving end is a WIFI AP, such as the home gateway HGW in FIG. 2, the optical network terminal ONT, and the cable modem CM.
  • the receiving end may also be another network device with a built-in WIFI AP.
  • the packet loss rate of the first packet is reduced in the transmission of the WIF interface. Rate, after the WIFI AP identifies the first packet carrying the first identifier, the first packet is copied, and the first packet is lost by sending the M first packet. rate.
  • a possible implementation manner is: if a data stream includes multiple packets carrying the first identifier, the receiving end may copy each packet carrying the first identifier to reduce Packet loss rate.
  • the M may be a value determined according to a default value of the number of copies of the message.
  • the M may also be a value determined according to the number of accesses and/or the quality of the link between the receiving end and the wireless terminal, where the number of accesses is the number of wireless terminals that have accessed the receiving end.
  • the M value may be inversely proportional to the link quality, and is proportional to the number of wireless terminals, that is, the better the link quality, the smaller the M value, the larger the number of wireless terminals, and the larger the M value.
  • the M value may also be other functional relationships related to multiple factors such as link quality and number of wireless terminals.
  • the receiving end can copy the first packet carrying the first identifier in the received one of the data streams, and carries the carried in the subsequently received data stream.
  • the first identified packet is not copied to reduce the number of packets that need to be sent by the receiving end, thereby reducing the link load between the receiving end and the wireless terminal.
  • the method further includes: receiving, by the receiving end, a third packet from the sending end, where the third packet is a packet that adds a first identifier to the fourth packet, where the An identifier is used to identify that the fourth packet is a packet of the N packets, and the N packets are N packets before the data stream to which the second packet belongs, and the receiving is performed; Sending, by the terminal, the third packet to the wireless terminal. That is, after the receiving end copies the first packet carrying the first identifier, the receiving end does not copy the subsequently received third packet carrying the first identifier.
  • the receiving end when the receiving end receives three acks sent by the wireless terminal, the receiving end will trigger the receiving end to resend the lost message by fast retransmission. If there is a lost packet before the first packet, the M is successfully sent the first packet and the M first packet obtained by the replication to the M.
  • the wireless terminal receives the ack corresponding to the first packet and the M acks corresponding to the M first messages, and triggers the receiving end to resend the lost packet by fast retransmission, thereby avoiding The generation of timeout retransmissions, at the same time, reduces the link load between the receiving end and the wireless terminal.
  • the receiving end WIFI AP when receiving the first message, may send the copied M first message after sending the first message, or may pass the timing according to a certain algorithm.
  • the device delays transmitting the M first messages in a certain time.
  • the destination of the packet sent by the WIFI AP in the embodiment of the present invention is The wireless terminal transmitted through the WIF interface can improve the transmission reliability of the first packet, reduce the packet loss rate, and not consume the bandwidth of other network devices by transmitting the M first packets.
  • the following is an example to illustrate the transmission process of a packet carrying the first identifier in the metropolitan area network. Please refer to FIG. 10, including the following contents:
  • the server 1 sets a first identifier in each of the N packets before the data stream sent to the wireless terminal completes transmission, and sends the N packets to the BNG.
  • the BNG After receiving the packet in the data stream, the BNG identifies the packet carrying the first identifier. When the BNG needs to discard the packet, the BNG preferentially discards the packet that does not carry the first identifier.
  • the BNG sends the packet carrying the first identifier to the WIFI AP.
  • the WIFI AP After receiving the packet in the data stream, the WIFI AP identifies the packet carrying the first identifier and copies the packet carrying the first identifier.
  • the WIFI AP sends the packet and the copy message of the packet to the wireless terminal.
  • an embodiment of the present invention further provides a sending apparatus, as shown in FIG.
  • the obtaining unit 111 is configured to obtain a first packet in the data stream, where the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify the second packet.
  • the message is a packet of the N packets, where the N packets are N packets before the data stream is transmitted, and N is greater than 0 and smaller than the number of packets of the data stream;
  • the sending unit 112 is configured to send the first packet to the receiving device.
  • the obtaining unit 111 is specifically configured to:
  • an embodiment of the present invention further provides a receiving end, as shown in FIG. 12, including: a processor 602, a transmitter 601, and a communication bus 600; wherein the processor 602 and the transmitter 601 pass The communication bus 600 completes communication with each other;
  • the processor 602 is configured to:
  • the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify that the second packet is N packets.
  • the N packets are N packets before the data stream is transmitted, and N is greater than 0 and smaller than the number of packets in the data stream;
  • the transmitter 601 is configured to:
  • the processor 602 is specifically configured to:
  • communication bus 600 can include any number of interconnected buses and bridges, and communication bus 600 connects various circuits including one or more processors represented by processor 602 and memory represented by memory 604. together. Communication bus 600 may also couple various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • Bus interface 605 provides an interface between communication bus 600 and transmitter 601.
  • Transmitter 601 can be a transceiver that provides means for communicating with various other devices on a transmission medium.
  • Processor 602 is responsible for managing communication bus 600 and general processing, while memory 604 can be used to store data used by processor 602 in performing operations.
  • an embodiment of the present invention further provides a receiving device, as shown in FIG. 13, including:
  • the first receiving unit 131 is configured to receive a first packet from the sending end, where the first packet is a packet that adds a first identifier to the second packet, where the first identifier is used to identify the first packet.
  • the second packet is a packet of the N packets, and the N packets are N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the data stream. Number of texts;
  • the processing unit 132 is configured to process the first packet according to a packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • processing unit 132 is specifically configured to:
  • the received packet queue corresponding to the data flow exceeds the first threshold, the received packet that does not carry the first identifier is preferentially discarded.
  • processing unit 132 is specifically configured to:
  • the discard probability Indicates the percentage of operations that perform packet discarding
  • the received packet queue corresponding to the data stream exceeds the second threshold, the received packet that does not carry the first identifier is discarded according to the discarding probability.
  • processing unit 132 is specifically configured to:
  • the M is a value determined according to a default value of the number of copies of the message.
  • the M is a value determined according to the number of accesses and/or the quality of the link between the receiving end and the wireless terminal, and the number of accesses is the number of wireless terminals that have accessed the receiving end.
  • the N is greater than 1, and the device further includes:
  • a second receiving unit configured to receive a third packet from the sending end, where the third packet is a packet that adds a first identifier to the fourth packet, where the first identifier is used to identify the Fourth message
  • the N packets are N packets before the data stream to which the second packet belongs.
  • a sending unit configured to send the third packet to the wireless terminal.
  • an embodiment of the present invention further provides a receiving end, as shown in FIG. 14, comprising: a processor 702, a receiver 701, a transmitter 703, and a communication bus 700; wherein the receiver 701, the The transmitter 703 and the processor 702 complete communication with each other through the communication bus 700;
  • the receiver 701 is configured to:
  • the first packet is a packet with a first identifier added to the second packet, and the first identifier is used to identify that the second packet is N packets.
  • the N packets are N packets before the data stream to which the second packet belongs, and N is greater than 0 and smaller than the number of packets in the data stream;
  • the processor 702 is configured to:
  • the first packet is processed according to a packet transmission policy, where the packet transmission policy includes a processing manner adopted by the first packet.
  • processor 702 is specifically configured to:
  • the received packet queue corresponding to the data flow exceeds the first threshold, the received packet that does not carry the first identifier is preferentially discarded.
  • processor 702 is specifically configured to:
  • the discard probability Indicates the percentage of operations that perform packet discarding
  • the discarding probability discards the received packet that does not carry the first identifier.
  • processor 702 is specifically configured to:
  • the transmitter 703 is configured to:
  • the M is a value determined according to a default value of the number of copies of the message.
  • the M is a value determined according to the number of accesses and/or the quality of the link between the receiving end and the wireless terminal, and the number of accesses is the number of wireless terminals that have accessed the receiving end.
  • the N is greater than 1, and the receiver 701 is specifically configured to:
  • the third packet is configured to receive the third packet from the sending end, where the third packet is a packet that is added with the first identifier in the fourth packet, where the first identifier is used to identify that the fourth packet is a message in the N packets, where the N packets are N packets before the data stream to which the second packet belongs;
  • the transmitter 703 is specifically configured to:
  • communication bus 700 can include any number of interconnected buses and bridges, and communication bus 700 connects various circuits including one or more processors represented by processor 702 and memory represented by memory 704. together. Communication bus 700 may also couple various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • Bus interface 705 provides an interface between communication bus 700 and transmitter 703. Receiver 701 and transmitter 703 may be the same component, i.e., a transceiver, providing means for communicating with various other devices on a transmission medium.
  • Processor 702 is responsible for managing communication bus 700 and general processing, while memory 704 can be used to store data used by processor 702 in performing operations.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de transmission de données, un dispositif de transmission et un dispositif de réception, facilitant la réduction d'un retard provoqué par une retransmission de temporisation et une durée d'achèvement de tâche. Le procédé comprend les opérations suivantes : une extrémité de transmission acquiert un premier paquet dans un flux de données, le premier paquet étant un paquet dans lequel un premier identificateur est ajouté à un second paquet, le premier identificateur étant utilisé pour identifier le second paquet comme l'un parmi N paquets avant l'achèvement de la transmission du flux de données, et N étant supérieur à 0 et inférieur à un nombre de paquets du flux de données ; et l'extrémité de transmission transmet le premier paquet à une extrémité de réception. L'extrémité de réception reçoit le premier paquet à partir de l'extrémité de transmission et traite le premier paquet selon une politique de transmission de paquet, et la politique de transmission de paquet comprend un procédé de traitement à réaliser sur le premier paquet.
PCT/CN2016/108902 2015-12-09 2016-12-07 Procédé de transmission de données, dispositif de transmission et dispositif de réception WO2017097201A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114826974A (zh) * 2022-04-29 2022-07-29 东风电驱动系统有限公司 Can报文超时计算方法、装置、设备及可读存储介质
CN114978986A (zh) * 2022-05-13 2022-08-30 中国联合网络通信集团有限公司 一种数据传输方法、装置及存储介质

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110535567B (zh) * 2019-09-20 2022-06-10 浙江科睿微电子技术有限公司 一种wlan系统聚合重传的方法及系统
CN112003816B (zh) * 2020-06-22 2023-04-18 武汉光迅科技股份有限公司 数据传输方法、装置、设备及存储介质
CN112865931B (zh) * 2020-12-30 2022-12-06 京信网络系统股份有限公司 数据重传处理方法、装置、设备和可读存储介质
CN113992607B (zh) * 2021-09-09 2023-11-03 新华三信息安全技术有限公司 报文处理方法及装置
CN116633911A (zh) * 2022-02-08 2023-08-22 华为技术有限公司 数据处理方法、设备及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101132352A (zh) * 2006-08-21 2008-02-27 中兴通讯股份有限公司 一种高速上行分组接入特性的实现方法及系统
EP2068486A1 (fr) * 2006-08-23 2009-06-10 Alcatel Lucent Procédé de gestion de retransmission de données dans un réseau sans fil à la dernière retransmission
CN101816154A (zh) * 2007-10-01 2010-08-25 摩托罗拉公司 无线通信系统中的状态报告触发
CN103986548A (zh) * 2013-02-07 2014-08-13 华为技术有限公司 一种确定丢包原因的方法和终端
US8964543B1 (en) * 2010-02-16 2015-02-24 Google Inc. System and method of reducing latency by transmitting duplicate packets over a network

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1996821B (zh) * 2006-01-05 2010-12-08 上海原动力通信科技有限公司 一种基于数据重传机制的数据传输方法
CN102377650B (zh) * 2010-08-12 2015-01-07 华为技术有限公司 数据发送处理方法、装置和系统
US8885496B2 (en) * 2010-10-08 2014-11-11 Sharp Kabushiki Kaisha Uplink control information transmission on backward compatible PUCCH formats with carrier aggregation
CN102638879A (zh) * 2011-02-12 2012-08-15 北京三星通信技术研究有限公司 一种分配ack/nack信道资源的方法
CN102217258B (zh) * 2011-04-12 2015-08-19 华为技术有限公司 探测处理方法、数据发送端、数据接收端以及通信系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101132352A (zh) * 2006-08-21 2008-02-27 中兴通讯股份有限公司 一种高速上行分组接入特性的实现方法及系统
EP2068486A1 (fr) * 2006-08-23 2009-06-10 Alcatel Lucent Procédé de gestion de retransmission de données dans un réseau sans fil à la dernière retransmission
CN101816154A (zh) * 2007-10-01 2010-08-25 摩托罗拉公司 无线通信系统中的状态报告触发
US8964543B1 (en) * 2010-02-16 2015-02-24 Google Inc. System and method of reducing latency by transmitting duplicate packets over a network
CN103986548A (zh) * 2013-02-07 2014-08-13 华为技术有限公司 一种确定丢包原因的方法和终端

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114826974A (zh) * 2022-04-29 2022-07-29 东风电驱动系统有限公司 Can报文超时计算方法、装置、设备及可读存储介质
CN114978986A (zh) * 2022-05-13 2022-08-30 中国联合网络通信集团有限公司 一种数据传输方法、装置及存储介质
CN114978986B (zh) * 2022-05-13 2024-05-14 中国联合网络通信集团有限公司 一种数据传输方法、装置及存储介质

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