WO2016161594A1 - Procédé et appareil de transmission de données - Google Patents

Procédé et appareil de transmission de données Download PDF

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Publication number
WO2016161594A1
WO2016161594A1 PCT/CN2015/076150 CN2015076150W WO2016161594A1 WO 2016161594 A1 WO2016161594 A1 WO 2016161594A1 CN 2015076150 W CN2015076150 W CN 2015076150W WO 2016161594 A1 WO2016161594 A1 WO 2016161594A1
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WO
WIPO (PCT)
Prior art keywords
data packet
wlan access
access device
lost
receiving
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
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PCT/CN2015/076150
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English (en)
Chinese (zh)
Inventor
罗海燕
彭文杰
邓天乐
张宏卓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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.)
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2015/076150 priority Critical patent/WO2016161594A1/fr
Priority to CN201580028631.7A priority patent/CN106416112B/zh
Publication of WO2016161594A1 publication Critical patent/WO2016161594A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for data transmission.
  • WLAN Wireless Local Area Networks
  • a feasible method is to integrate wireless cellular technology and WLAN technology, and use WLAN to offload data traffic of wireless cellular communication systems to improve user experience and achieve efficient and low-cost communication.
  • the technology of the wireless communication between the base station and the terminal and the wireless local area network communication between the WLAN and the terminal is called MSA (Multi Stream Aggregation), wherein the base station and the WLAN AC (Wireless Local Area) There is a logical interface between Networks Access control, Wireless Local Area Networks (Access Point) and WLAN AP (Wireless Local Area Networks Access Point).
  • the WLAN is based on the contention mechanism for data transmission.
  • the WLAN resources are limited, which may reduce the channel quality between the WLAN and the UE that is transmitting data, resulting in data loss.
  • the WLAN access device is configured with a retransmission mechanism, and the retransmission mechanism has a maximum number of retransmissions. When the number of retransmissions of a data packet reaches the maximum number of retransmissions, the data packet is discarded because the WLAN access device cannot access the data packet. For parsing, only the data packet can be forwarded, so when the data packet is discarded, the data packet is permanently lost.
  • the base station and the WLAN access device perform data packet transmission
  • the data packet when the data packet is lost on the logical interface between the two, the data packet cannot be retransmitted, so the permanent loss of the data packet is also caused.
  • the data packet that may be manufactured by the retransmission machine based on the WLAN access device described above is permanently lost, and the data packet may be permanently lost when the base station and the WLAN access device perform data packet transmission. Therefore, in the prior art, The packet loss rate caused by data transmission through the WLAN side is high, resulting in low transmission performance of the entire network.
  • embodiments of the present invention provide a data transmission method and apparatus for improving network transmission performance.
  • a first aspect of the embodiments of the present invention provides a data transmission method, including:
  • the sending device receives a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a wireless local area network The serial number that the WLAN access device can recognize;
  • the sending device determines the lost data packet according to the number of the lost data packets and the first identifier of the lost data packet;
  • the transmitting device retransmits the lost data packet.
  • the sending device receiving the status report includes: the sending device receiving the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the WLAN access device sorting and confirming the first sequence number of the received data packet.
  • a sequence number of the data packet wherein the first sequence number includes a sequence number that the sending device adds to the data packet and that is identifiable by the sending device and the WLAN access device; the lost data packet a data packet lost when the sending device sends a data packet to the WLAN access device;
  • the transmitting device resending the lost data packet includes:
  • the transmitting device transmits the determined lost data packet to the receiving device over the cellular communication link.
  • the sending device receiving the status report includes: the sending device receiving the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship, the first mapping The relationship includes the first serial number and the data packet that the WLAN access device parses and saves the data packet that is received by the sending device and includes the first serial number.
  • the lost data packet includes a data packet that the WLAN access device sends the parsed data packet to the receiving device and does not receive the acknowledgement message after the preset number of retransmissions; wherein the first serial number includes the a sequence number that the sending device adds to the data packet and the WLAN access device can identify the serial number; wherein the lost data packet is that the WLAN access device sends a data packet to the receiving device The lost data packet;
  • the transmitting device resending the lost data packet includes:
  • the serial number of the lost data packet further includes a second serial number of the lost data packet, and the sending device determines the second serial number of the lost data packet according to the second mapping relationship between the preset first serial number and the second serial number.
  • the second serial number includes a sequence number that can be recognized by both the sending device and the receiving device, and the sending device sends the lost data packet including the second serial number to the receiving device by using a cellular communication link.
  • the sending device receiving the status report includes: the sending device receiving the status report by using a receiving device;
  • the serial number of the lost data packet includes a second serial number of the lost data packet, and the second serial number of the lost data packet includes a sequence number that the receiving device sorts and confirms the second serial number of the received data packet to be lost;
  • the second sequence number includes a sequence number that can be identified by the sending device and the receiving device, where the lost data packet is a data packet that is lost when the sending device sends a data packet to the receiving device, or Decoding a data packet that is lost when the WLAN access device sends a data packet to the receiving device;
  • the transmitting device resending the lost data packet includes:
  • the serial number of the lost data packet further includes a first serial number of the lost data packet, and the sending device determines the first serial number of the lost data packet according to the second mapping relationship between the first serial number and the second serial number, where
  • the first sequence number includes a sequence number that can be identified by the sending device and the WLAN access device, and the sending device sends the lost data packet that includes the first sequence number to the WLAN access device.
  • the sending, by the sending device, the status report includes: the sending device receiving the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a second sequence number of the lost data packet, and the second sequence number of the lost data packet includes the WLAN access device sorting and confirming the second sequence number of the received data packet to be lost.
  • the sequence number of the second serial number includes the serial number that can be identified by the sending device, the receiving device, and the WLAN access device; wherein the lost data packet is the sending device to the WLAN access The data packet lost when the device sends the data packet;
  • the transmitting device resending the lost data packet includes:
  • the transmitting device transmits the determined lost data packet including the second sequence number to the receiving device over the cellular communication link.
  • the status report further includes a second identifier, where the second identifier is used to indicate that the receiving device receives The serial number of the largest packet;
  • the method further includes:
  • the transmitting device sends a new data packet to the WLAN access device according to the determined quantity.
  • the sending device receiving the status report includes: the sending device accessing the device through the WLAN Receiving the status report; the second identifier includes a data size requested by the WLAN access device and a sequence number of a data packet that the WLAN access device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device for the receiving device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access The data size requested by the device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the data requested by the WLAN access device for the corresponding access type of the receiving device. The size, and the minimum data size requested by the WLAN access device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device.
  • the sending device receiving the status report includes: the sending device receiving the receiving device by using the receiving device
  • the second identifier includes a maximum second serial number of the data packet received by the receiving device, where the second serial number includes a serial number that can be recognized by both the sending device and the receiving device;
  • Determining, by the sending device, the data size sent to the WLAN access device according to the second identifier includes:
  • the sending device is configured to: according to the first serial number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending device has been
  • the size of the WLAN access device transmitting the data packet calculates a rate at which the WLAN access device sends the data packet to the receiving device;
  • the sending device determines, according to a rate at which the WLAN access device sends data to the receiving device, a data size that is sent to the WLAN access device.
  • a second aspect of the embodiments of the present invention provides a data transmission method, including:
  • the WLAN access device Sending, by the WLAN access device, a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the lost data.
  • the number of packets and the first identity of the lost data packet determine a lost data packet and cause the transmitting device to resend the lost data packet.
  • the serial number of the lost data packet includes a first serial number of the lost data packet, where the lost data packet is a serial number includes a serial number of the WLAN access device that sorts and confirms the first serial number of the received data packet; wherein the first serial number includes the sending device added by the sending device to the data packet a sequence number that can be identified by the WLAN access device; the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the method further includes:
  • the sending device retransmitting a lost data packet that includes the first sequence number
  • the WLAN access device sends the lost data packet to the receiving device.
  • the serial number of the lost data packet includes a first serial number of the lost data packet, where the lost data packet is The sequence number includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the data packet that the WLAN access device receives from the sending device and includes the first sequence number.
  • the lost data packet includes the WLAN access device sending the parsed data packet to the receiving device and failing to receive the acknowledgement after exceeding the preset number of retransmissions a data packet of the message; wherein the first sequence number includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; wherein the lost data packet is the WLAN a data packet lost when the access device sends the data packet to the receiving device;
  • the method further includes:
  • the sending device retransmitting a lost data packet that includes the first sequence number
  • the WLAN access device sends the lost data packet to the receiving device.
  • the status report further includes a second identifier, where the second identifier is used to indicate a data size requested by the WLAN access device, and a maximum sequence number of the data packet that the WLAN access device receives the acknowledgement message sent by the receiving device. ;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection a minimum data size requested by the ingress device for the receiving device and a data size requested by the WLAN access device for the corresponding bearer of the receiving device;
  • the WLAN access device sends the new data packet to the receiving device.
  • a third aspect of the embodiments of the present invention provides a data transmission method, including:
  • the receiving device receives, by the receiving device, a first identifier of the lost data packet, the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the second receiving, by the receiving device, the received data packet Sorting the serial number to confirm the missing serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is the data packet lost when the transmitting device sends the data packet to the receiving device Or a data packet that is lost when the WLAN access device sends the data packet to the receiving device;
  • the sending device Sending, by the receiving device, a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data packet.
  • the first identifier and the number of the lost data packets determine a lost data packet and retransmit the lost data packet.
  • the method further includes:
  • the sending device retransmitting a lost data packet that includes the second serial number through a cellular communication link;
  • the receiving device receives a lost data packet that is retransmitted by the WLAN access device and includes the second serial number.
  • the third aspect of the embodiment of the present invention or the first implementation manner of the third aspect is implemented in the present invention.
  • the receiving device sends a status report to the sending device according to a preset period;
  • the status report further includes a second identifier, where the second identifier includes a maximum second sequence number of the data packet received by the receiving device, so that the sending device determines to the WLAN access device according to the second identifier. The number of packets sent.
  • a fourth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the sending device receives a status report, where the status report includes a data packet identifier, where the data packet identifier is used to indicate a sequence number of the largest data packet received by the receiving device;
  • the transmitting device sends a new data packet to the WLAN access device according to the determined quantity.
  • the sending device receiving the status report includes: the sending device receiving the status report by using a WLAN access device;
  • the data packet identifier includes a data size requested by the WLAN access device and a maximum sequence number of a data packet that the WLAN access device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection The minimum data size requested by the ingress device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device.
  • the sending device receiving the status report includes: the sending device receiving the status report by using a receiving device;
  • the packet identifier includes a maximum second sequence of data packets received by the receiving device No. wherein the second serial number includes a serial number that can be recognized by the sending device and the receiving device;
  • Determining, by the sending device, that the data packet size is sent to the WLAN access device according to the data packet identifier includes:
  • the sending device is configured to: according to the first serial number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending device has been
  • the size of the WLAN access device transmitting the data packet calculates a rate at which the WLAN access device sends data to the receiving device;
  • the sending device determines a data size that can be sent to the WLAN access device according to a rate at which the WLAN access device sends data to the receiving device.
  • a fifth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the WLAN access device sends a status report to the sending device, where the status report includes a data packet identifier, where the data packet identifier is used to indicate the data size requested by the WLAN access device and the WLAN access device receives the acknowledgement sent by the receiving device.
  • the maximum serial number of the packet of the message includes a data packet identifier, where the data packet identifier is used to indicate the data size requested by the WLAN access device and the WLAN access device receives the acknowledgement sent by the receiving device.
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection The minimum data size requested by the ingress device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device; so that the sending device determines to connect to the WLAN according to the data packet identifier. Transmitting, by the device, the number of data packets, and causing the sending device to send a new data packet to the WLAN access device according to the determined quantity;
  • the WLAN access device sends the new data packet to the receiving device.
  • a sixth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the receiving device sends a status report to the sending device according to a preset period, where the status report includes a data packet identifier, where the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device, and the second sequence The number includes a serial number that can be identified by both the sending device and the receiving device, so that the sending device determines the number of data packets to be sent to the WLAN access device according to the data packet identifier.
  • a seventh aspect of the embodiments of the present invention provides a sending device, including:
  • a receiving unit configured to receive a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet, the serial number Including a serial number that the wireless local area network WLAN access device can recognize;
  • a first determining unit configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, the lost data packet
  • a retransmission unit configured to resend the lost data packet.
  • the receiving unit includes: a first receiving subunit, configured to receive the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the WLAN access device sorting and confirming the first sequence number of the received data packet.
  • a sequence number of the data packet wherein the first sequence number includes a sequence number that the sending device adds to the data packet and that is identifiable by the sending device and the WLAN access device; the lost data packet a data packet lost when the sending device sends a data packet to the WLAN access device;
  • the retransmission unit includes:
  • a first retransmission subunit configured to retransmit the determined lost data packet that includes the first sequence number to the WLAN access device
  • the determined lost data packet is transmitted to the receiving device over the cellular communication link.
  • the receiving unit includes: a second receiving subunit, configured to receive the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes an order determined by the WLAN access device according to the first mapping relationship.
  • the lost data packet includes a data packet that the WLAN access device sends the parsed data packet to the receiving device and does not receive the acknowledgement message after the preset number of retransmissions; wherein the first sequence number includes the sending device a sequence number that can be identified by both the sending device and the WLAN access device added by the data packet; wherein the lost data packet is lost when the WLAN access device sends a data packet to the receiving device data pack;
  • the retransmission unit includes:
  • a second retransmission subunit configured to retransmit the lost data packet that includes the first sequence number to the WLAN access device
  • the sending device Transmitting, by the cellular communication link, a lost data packet including the second serial number to the receiving device, where the serial number of the lost data packet further includes a second serial number of the lost data packet, the sending device according to the preset
  • the second mapping relationship between the first sequence number and the second sequence number determines a second sequence number of the lost data packet, and the second sequence number includes a sequence number that can be recognized by both the sending device and the receiving device.
  • the receiving unit includes: a third receiving subunit, configured to receive the status report by using a receiving device;
  • the serial number of the lost data packet includes a second serial number of the lost data packet, and the second serial number of the lost data packet includes a sequence number that the receiving device sorts and confirms the second serial number of the received data packet to be lost;
  • the second sequence number includes a sequence number that can be identified by the sending device and the receiving device, where the lost data packet is a data packet that is lost when the sending device sends a data packet to the receiving device, or Decoding a data packet that is lost when the WLAN access device sends a data packet to the receiving device;
  • the retransmission unit includes:
  • a third retransmission subunit configured to retransmit the lost data packet including the second serial number to the receiving device by using a cellular communication link;
  • the second mapping relationship between the number and the second sequence number determines a first sequence number of the lost data packet, wherein the first sequence number includes a sequence number that can be recognized by both the sending device and the WLAN access device.
  • the receiving unit includes: a fourth receiving subunit, configured to receive the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a second sequence number of the lost data packet, and the second sequence number of the lost data packet includes the WLAN access device sorting and confirming the second sequence number of the received data packet to be lost.
  • the sequence number of the second serial number includes the serial number that can be identified by the sending device, the receiving device, and the WLAN access device; wherein the lost data packet is the sending device to the WLAN access The data packet lost when the device sends the data packet;
  • the retransmission unit includes:
  • a fourth retransmission subunit configured to retransmit the determined lost data packet including the second serial number to the WLAN access device
  • the determined lost data packet containing the second sequence number is transmitted to the receiving device over the cellular communication link.
  • the status report further includes a second identifier, where the second identifier is used to indicate that the receiving device receives The serial number of the largest packet;
  • the sending device further includes:
  • a second determining unit configured to determine, according to the second identifier, a data size that is sent to the WLAN access device, and determine, according to the data size, a quantity of the data packet sent by the sending device to the WLAN access device;
  • a sending unit configured to send a new data packet to the WLAN access device according to the determined quantity.
  • the receiving unit includes: a fifth receiving sub-unit, configured to access the device by using a WLAN Receiving the status report; the second identifier includes a data size requested by the WLAN access device and a sequence number of a data packet that the WLAN access device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device for the receiving device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access The data size requested by the device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the data requested by the WLAN access device for the corresponding access type of the receiving device. The size, and the minimum data size requested by the WLAN access device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device.
  • the receiving unit includes: a sixth receiving subunit, configured to receive by the receiving device
  • the second identifier includes a maximum second serial number of the data packet received by the receiving device, where the second serial number includes a serial number that can be recognized by both the sending device and the receiving device;
  • the second determining unit includes:
  • a first determining subunit configured to determine, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet; where the first sequence number includes the sending a serial number that can be recognized by both the device and the WLAN access device;
  • a second determining subunit configured to: receive, according to the first sequence number that the WLAN access device successfully sends to the receiving device data packet, a period in which the sending device receives the status report by using the receiving device, and the sending device Calculating, by the size of the data packet sent by the WLAN access device, a rate at which the WLAN access device sends a data packet to the receiving device;
  • a third determining subunit configured to determine, according to a rate at which the WLAN access device sends data to the receiving device, a data size that is sent to the WLAN access device.
  • An eighth aspect of the embodiments of the present invention provides a WLAN access device, including:
  • a determining unit configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a sequence number that the WLAN access device can identify;
  • a first sending unit configured to send a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is according to the lost
  • the number of data packets and the first identity of the lost data packet determine a lost data packet and cause the transmitting device to resend the lost data packet.
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the WLAN access device sorting the first serial number of the received data packet Determining the missing serial number; wherein the first serial number includes a serial number that the transmitting device adds to the data packet and the WLAN access device can identify; the lost data packet is the sending device a data packet lost when the data packet is sent to the WLAN access device;
  • the WLAN access device further includes:
  • a first receiving unit configured to receive, by the sending device, retransmit the lost data packet that includes the first serial number
  • a second sending unit configured to send the lost data packet to the receiving device.
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet
  • the first data packet of the lost data packet The sequence number includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the data packet that the WLAN access device receives from the sending device and includes the first sequence number.
  • the lost data packet includes the WLAN access device sending the parsed data packet to the receiving device and failing to receive the acknowledgement after exceeding the preset number of retransmissions a data packet of the message; wherein the first sequence number includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; wherein the lost data packet is the WLAN a data packet lost when the access device sends the data packet to the receiving device;
  • the WLAN access device further includes:
  • a second receiving unit configured to receive, by the sending device, retransmit the lost data packet that includes the first serial number
  • a third sending unit configured to send the lost data packet to the receiving device.
  • the status report is further The second identifier is used to indicate a data size requested by the WLAN access device and a sequence number of the data packet that the WLAN access device receives the acknowledgement message sent by the receiving device.
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection a minimum data size requested by the ingress device for the receiving device and a data size requested by the WLAN access device for the corresponding bearer of the receiving device;
  • the WLAN access device further includes:
  • a third receiving unit configured to receive a new data packet that is sent by the sending device to the WLAN access device according to the second identifier
  • a fourth sending unit configured to send the new data packet to the receiving device.
  • a ninth aspect of the embodiments of the present invention provides a receiving device, including:
  • a determining unit configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data packet by the receiving device
  • the second serial number is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is lost when the transmitting device sends the data packet to the receiving device Data packet, or a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • a sending unit configured to send a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data packet
  • the first identifier and the number of the lost data packets determine the lost data packet and retransmit the lost data packet.
  • the receiving device further includes:
  • a receiving unit configured to receive, by the sending device, retransmit the lost data packet that includes the second serial number by using a cellular communication link;
  • the sending unit includes: a sending subunit, configured to Sending a status report to the sending device by a preset period; the status report further includes a second identifier, where the second identifier includes a maximum second sequence number of the data packet received by the receiving device, so that the sending The device determines, according to the second identifier, the number of data packets sent to the WLAN access device.
  • a tenth aspect of the embodiments of the present invention provides a sending device, including:
  • a receiving unit configured to receive a status report, where the status report includes a data packet identifier, where the data packet identifier is used to indicate a sequence number of a maximum data packet received by the receiving device;
  • a determining unit configured to determine, according to the data packet identifier, a data size that is sent to the WLAN access device, and determine, according to the size, a quantity of the data packet sent by the sending device to the WLAN access device;
  • a sending unit configured to send a new data packet to the WLAN access device according to the determined quantity.
  • the receiving unit includes: a first receiving subunit, configured to receive the status report by using a WLAN access device;
  • the data packet identifier includes a data size requested by the WLAN access device and a maximum sequence number of a data packet that the WLAN access device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection The minimum data size requested by the ingress device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device.
  • the receiving unit includes: a second receiving subunit, configured to receive the status report by using a receiving device;
  • the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device, where the second sequence number includes a sequence number that can be recognized by both the sending device and the receiving device;
  • the determining unit includes:
  • a first determining subunit configured to determine, according to a maximum second sequence number of the data packet The maximum first sequence number that the WLAN access device successfully sends to the receiving device data packet; wherein the first serial number includes a serial number that can be recognized by the sending device and the WLAN access device;
  • a second determining subunit configured to: receive, according to the first sequence number that the WLAN access device successfully sends to the receiving device data packet, a period in which the sending device receives the status report by using the receiving device, and the sending device Calculating, by the size of the data packet sent by the WLAN access device, a rate at which the WLAN access device sends data to the receiving device;
  • a third determining subunit configured to determine, according to a rate at which the WLAN access device sends data to the receiving device, a data size that is sent to the WLAN access device.
  • An eleventh embodiment of the present invention provides a WLAN access device, including:
  • a first sending unit configured to send a status report to the sending device, where the status report includes a data packet identifier, where the data packet identifier is used to indicate a data size requested by the WLAN access device, and the WLAN access device receives the receiving device The maximum serial number of the packet of the acknowledgment message sent;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection The minimum data size requested by the ingress device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device; so that the sending device determines to connect to the WLAN according to the data packet identifier. Transmitting, by the device, the number of data packets, and causing the sending device to send a new data packet to the WLAN access device according to the determined quantity;
  • a receiving unit configured to receive, by the WLAN access device, a new data packet that is sent by the sending device to the WLAN access device according to the data packet identifier
  • a second sending unit configured to send the new data packet to the receiving device.
  • a twelfth aspect of the embodiments of the present invention provides a receiving device, including:
  • a sending unit configured to send a status report to the sending device according to a preset period, where the status report includes a data packet identifier, where the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device,
  • the second serial number includes a serial number that can be recognized by both the sending device and the receiving device. So that the sending device determines the number of data packets to be sent to the WLAN access device according to the data packet identifier.
  • a thirteenth aspect of the embodiments of the present invention provides a communication system, including:
  • a transmitting device according to any of the above-mentioned seventh aspects, any one of the WLAN access devices of the eighth aspect, and any one of the receiving devices according to the ninth aspect.
  • a fourteenth aspect of the embodiments of the present invention provides a communication system, including:
  • a transmitting device according to any of the tenth aspects, the WLAN access device according to the eleventh aspect, and the receiving device according to the twelfth aspect.
  • the present invention includes a data transmission method for improving network transmission performance, including: a transmitting device receiving a status report, the status report including a first identifier of a lost data packet and a number of lost data packets; the lost data The first identifier of the packet includes a sequence number of the lost data packet, and the serial number includes a sequence number that the wireless local area network WLAN access device can identify; the sending device is configured according to the number of the lost data packet and the first of the lost data packet The identification determines a lost data packet; the transmitting device retransmits the lost data packet.
  • the sequence number of the data packet is a sequence number that the WLAN access device can identify, so that after receiving the data packet sent by the sending device, the WLAN access device can parse the sequence number of the received data packet, thereby being able to determine The serial number of the lost data packet between the transmitting device and the WLAN access device and the number of lost data packets; the WLAN access device feeds back the serial number of the lost data packet and the number of lost data packets to the transmitting device.
  • the sending device receives the sequence number including the lost data packet and the number of lost data packets, it determines the corresponding lost data packet, and then retransmits the lost data packet, thereby reducing the packet loss rate of the data packet and improving the network. Transmission performance.
  • FIG. 1 is a schematic diagram of a multi-stream aggregation MSA network architecture in which a wireless cellular communication link and a wireless local area network communication link are fused in the background art;
  • FIG. 2 is a schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 3 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 4 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 5 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 6 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 7 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 8 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 9 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 10 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 11 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 12 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 13 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 14 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 15 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • 16 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 17 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 18 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 19 is another schematic diagram of a data transmission method according to an embodiment of the present invention.
  • FIG. 20 is a schematic diagram of a sending device according to an embodiment of the present invention.
  • 21 is another schematic diagram of a transmitting device according to an embodiment of the present invention.
  • FIG. 22 is another schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 23 is another schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 24 is a schematic diagram of a WLAN access device according to an embodiment of the present invention.
  • 25 is another schematic diagram of a WLAN access device according to an embodiment of the present invention.
  • 26 is another schematic diagram of a WLAN access device according to an embodiment of the present invention.
  • FIG. 27 is a schematic diagram of a receiving device according to an embodiment of the present invention.
  • FIG. 28 is another schematic diagram of a receiving device according to an embodiment of the present invention.
  • FIG. 29 is another schematic diagram of a receiving device according to an embodiment of the present invention.
  • FIG. 30 is another schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 31 is another schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 32 is another schematic diagram of a WLAN access device according to an embodiment of the present invention.
  • FIG. 33 is another schematic diagram of a sending device according to an embodiment of the present invention.
  • FIG. 34 is another schematic diagram of a WLAN access device according to an embodiment of the present invention.
  • FIG. 35 is another schematic diagram of a receiving device according to an embodiment of the present invention.
  • FIG. 36 is a schematic diagram of a specific application scenario of a data transmission method according to an embodiment of the present invention.
  • the downlink data may include the first part of the downlink data and the second part of the downlink. data.
  • the eNB offloads the first part of the downlink data to the WLAN AC or the AP, and then sends the data to the UE through the WLAN AP.
  • the second part of the downlink data is directly sent by the eNB to the UE through the wireless cellular network, so that the transmission capability of the wireless cellular network and the WLAN network can be utilized at the same time. To achieve higher UE downlink peak transmission rate.
  • the uplink data may include a first part of uplink data and a second part of uplink data.
  • the UE offloads the first part of the uplink data to the WLAN AP, and then sends the data to the eNB via the WLAN AC or the AP.
  • the second part of the uplink data is directly sent by the UE to the eNB through the wireless cellular network, so that the transmission capability of the wireless cellular network and the WLAN network can be utilized at the same time. To achieve higher UE uplink peak transmission rate.
  • the eNB can split the data in the Packet Data Convergence Protocol (PDCP) layer, that is, the first part of the PDCP PDU (Packet Data Convergence Protocol Protocol Data Unit)
  • PDCP Packet Data Convergence Protocol
  • the protocol data unit is distributed to the WLAN AP and sent to the UE through the WLAN network.
  • the eNB transmits the second part of the PDCP PDU to the lower layer RLC layer and sends it to the UE through the LTE (Long Term Evolution) network.
  • LTE Long Term Evolution
  • the WLAN AP After the first part of the PDCP PDU arrives at the WLAN AP, the WLAN AP sends the first part of the PDCP PDU to the UE through the WLAN, according to the corresponding indication, to reach the WLAN module in the UE, and finally uploads to the PDCP layer of the UE;
  • the PDU reaches the UE's LTE module through the cellular network and is aggregated with the first part of the PDCP PDU at the PDCP layer.
  • Two parts of the PDCP PDU to The PDCP layer of the UE is sorted and finally uploaded to the upper application in sequence.
  • the UE may perform data distribution on the PDCP layer, distribute the first part of the PDCP PDU to the WLAN module in the UE, and send the first part of the PDCP PDU to the WLAN AP through the WLAN communication mode, and the WLAN AP receives the first After a part of the PDCP PDU, the first part of the PDCP PDU is delivered to the eNB according to the corresponding indication; the second part of the PDCP PDU is delivered to the lower layer RLC, and sent to the eNB through the LTE network.
  • the first part of the PDCP PDU is transmitted to the PDCP layer of the eNB through the logical interface between the WLAN AP and the eNB, the second part of the PDCP PDU reaches the PDCP layer of the eNB through the LTE network, and the two parts of the PDCP PDU are aggregated at the PDCP layer, and the PDCP layer pairs the PDCP PDU.
  • the PDCP PDUs are sequentially uploaded to the upper layer.
  • the embodiment of the invention discloses a data transmission method and device.
  • an embodiment of the data transmission method provided by the present invention is described in detail with reference to FIG. 2 .
  • the data transmission method includes:
  • the sending device receives a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet; the lost data packet The first identifier includes a serial number of the lost data packet, and the serial number includes a serial number that the wireless local area network WLAN access device can recognize;
  • the identifier of the data packet is identifiable between the sending device and the receiving device in the LTE network, if the sending device directly sends the data packet to the WLAN access device, the WLAN access device only The data packet can be received or sent, but the data packet cannot be identified or parsed. At the same time, the identifier of the data packet sent by the sending device to the WLAN access device is not necessarily continuous or has rules. Therefore, even if the WLAN access device can read the identifier of the data packet, the WLAN access device cannot determine whether a packet loss occurs according to the identifier.
  • the sequence number is a sequence number that the WLAN access device can identify, so that when the WLAN access device receives the data packet sent by the sending device, the data packet can be identified, and Processing the sequence number of the data packet to determine the sequence number of the lost data packet, and transmitting the number of the lost data packet and the sequence number of the lost data packet to the transmitting device.
  • the sending device and the WLAN access device newly create a signaling link for the WLAN access device to report the status report.
  • the status report includes the serial number of the lost data packet, so that the sending device loses the receiving. After the serial number of the packet, the lost packet is determined and the lost packet is retransmitted.
  • the sending device determines, according to the number of the lost data packets and the first identifier of the lost data packet, a lost data packet.
  • the sending device After receiving the first identifier of the lost data packet, that is, the sequence number of the lost data packet, the sending device can determine the lost data packet corresponding to the sequence number of the lost data packet.
  • the sending device retransmits the lost data packet.
  • the transmitting device retransmits the lost data packet after determining the lost data packet, thereby reducing the packet loss rate of the data packet.
  • the sequence number of the data packet is a sequence number that the WLAN access device can identify, so that the WLAN access device can parse the serial number of the received data packet after receiving the data packet sent by the sending device.
  • the sequence number of the lost data packet between the transmitting device and the WLAN access device can be determined; the WLAN access device feeds back the serial number of the lost data packet to the transmitting device.
  • the receiving device receives the serial number including the lost data packet, it determines the corresponding lost data packet, and then retransmits the lost data packet, thereby reducing the packet loss rate of the data packet and improving the transmission performance of the network.
  • the foregoing embodiment describes a status report that the sending device receives the first identifier that includes the lost data packet by using the WLAN access device.
  • the sending device receives the first packet of the lost data packet by using the WLAN access device.
  • the identifier includes two cases, the first is that the sending device loses the data packet when sending the data packet to the WLAN access device; the second is that the WLAN access device forwards the data packet to the receiving Packet loss occurred while the device was in use.
  • the first case is specifically described below.
  • another embodiment of the data transmission method in the embodiment of the present invention includes:
  • the sending device receives, by the WLAN access device, the number of lost data packets and the first sequence number of the lost data packet, where the first sequence number of the lost data packet includes the received data by the WLAN access device.
  • the first serial number of the packet is sorted to confirm the lost serial number; wherein the first serial number includes a serial number that can be recognized by the sending device and the WLAN access device added by the sending device to the data packet;
  • the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the WLAN access device may not be able to parse the data packet, though However, the current situation does not affect the WLAN access device forwarding the data packet to the sending device, but the WLAN terminal cannot feed back the transmission status of the received data packet to the sending device.
  • the sending device sets the first serial number that the WLAN access device can recognize to the data packet, and the first serial number may be implemented by relying on the GTP-U protocol, or may depend on protocols such as CAPWAP, 802.3, and IP. achieve.
  • GTP-U takes GTP-U as an example:
  • the sending device in the downlink direction, includes an eNB, the receiving device includes a UE, and the WLAN access device includes a WLAN AP, or a WLAN AC, or an adaptation layer between the WLAN side and the LTE side, or the WLAN side and the LTE side.
  • the transmitting device encapsulates the PDCP PDU (Packet Data Convergence Protocol Protocol Data Unit) to be sent into a data packet, and allocates a continuous independent first sequence number to the data packet.
  • PDCP PDU Packet Data Convergence Protocol Protocol Data Unit
  • the following line direction is taken as an example, where the WLAN access device includes a WLAN AP, and the first sequence number may be written in a GTP-U extension header, and after the WLAN AP receives the data packet, The first sequence number of the data packet can be read out, and the payload of the data packet, that is, the PDCP PDU, can be solved, and the PDCP PDU is sent to the WLAN module of the UE through the WLAN transmission mode.
  • the packet loss of the sending device and the WLAN access device may be determined by using the first sequence number.
  • the sending device sends a Packet Data Convergence Protocol Sequence Number (LPTP) in the LTE network system.
  • LPTP Packet Data Convergence Protocol Sequence Number
  • the PDUs of the 3, 4, 7, and 8 are encapsulated and sent to the WLAN access device.
  • the specific encapsulation mode is not limited.
  • Each PDCP PDU may be encapsulated into one data packet, or multiple PDCP PDUs may be encapsulated into one data.
  • a packet can also be a PDCP PDU encapsulated into multiple packets. In this embodiment, each PDCP PDU is encapsulated into one data packet.
  • the WLAN access device receives the data packet with the first sequence number of 1, 2, and 4, and when receiving the data packet with the first serial number of 4, it is found that the previously received 2 is not continuous, and then the WLAN access device can determine The first sequence number 3 packet is lost.
  • the sort timer may also be started, and the timer is not received after the timer expires. The first sequence number is 3, and the packet with the first sequence number 3 is determined to be lost.
  • the WLAN access device confirms that the first serial number is 3 After the packet is lost, the sending device is notified in the next status report to request retransmission of the first sequence number 3 packet. It should be noted that, in the network transmission, when a data packet is transmitted, a start flag is added in the first data packet, and an end flag is added in the last data packet. Therefore, in the embodiment of the present invention, if the lost data packet is The first or last one, the WLAN access device can also recognize.
  • the status report should also include the number of lost data packets, so that when the sending device receives the status report, it can accurately parse the first serial number of all lost data packets, and thus the lost data.
  • the package is retransmitted.
  • the manner in which the first serial number can be implemented by using a protocol such as CAPWAP, 802.3, and IP is similar to the foregoing manner, and details are not described herein.
  • the sending device when the sending device sends a data packet to the WLAN access device, the data may be encapsulated into an IP packet, and the IP address and the related domain are matched with the receiving device, and the bearer mapping is performed. Wait.
  • the header identifier field of the IP packet uniquely identifies each packet sent by the host, and its value is incremented by one for each message sent.
  • the WLAN access device After receiving the IP packet after the IP header is added to the PDCP PDU, the WLAN access device reads the identifier field in the IP header, and uses the identifier field as a basis for interaction between the WLAN access device and the sending device, as described above.
  • the first serial number described in the example. It is similar to the method described in the foregoing embodiment, and is not described here.
  • the PDCP PDU is generally not directly transmitted, but in some form, that is, the transmitting device and the WLAN access.
  • the interface between the devices is implemented by a certain protocol. This can be the GTP-U protocol.
  • the PDCP PDU is transmitted in the form of adding a GTP-U header to the PDCP PDU.
  • the IP protocol can transmit the PDCP.
  • the PDU is in the form of adding an IP header to the PDCP PDU. It can also be GTP-U+IP.
  • the PDCP PDU is transmitted in the form of adding a GTP-U header and an IP header to the PDCP PDU.
  • the sending device determines, according to the number of the lost data packets and the first sequence number of the lost data packet, a lost data packet.
  • the transmitting device Since the transmitting device retains the mapping relationship between the data packet and the first identifier, the transmitting device can determine the lost data packet according to the first sequence number of the lost data packet.
  • the sending device retransmits the lost data packet that includes the first sequence number to the WLAN access.
  • the device; or the transmitting device sends the determined lost data packet to the receiving device through the cellular communication link;
  • the WLAN access device may retransmit the lost data packet including the first sequence number, and then the WLAN access device forwards the lost data packet to the receiving device;
  • the link transmits the determined lost data packet to the receiving device. Which retransmission mode is specifically selected may be determined by the transmitting device according to the transmission status and stability of the actual link.
  • the WLAN access device when a packet loss occurs between the sending device and the WLAN access device, sorts the first sequence number of the received data packet, and determines the lost data packet, and then determines the lost data packet. Returning the first sequence number of the lost data packet to the sending device, if the sending device retransmits the lost data packet including the first serial number to the WLAN access device, because the WLAN network has a transmission speed compared to the LTE network
  • the fast feature in this way, improves the transmission efficiency of the network and improves the utilization of the WLAN network; if the transmitting device transmits the determined lost data packet to the receiving device through the LTE link, since the LTE network is compared to the WLAN network In other words, it has the characteristics of strong stability, which improves the stability of network transmission and improves the quality of network transmission.
  • Another embodiment of the method for data transmission in the embodiment of the present invention includes:
  • the sending device receives a first sequence number of the lost data packet by using the WLAN access device, where the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first The mapping relationship includes a mapping relationship between the first sequence number and the data packet that the WLAN access device parses and stores the data packet that includes the first sequence number received from the sending device, where the lost data packet includes the After the WLAN access device sends the parsed data packet to the receiving device and exceeds the preset number of retransmissions, the data packet that fails to receive the acknowledgment message is received; wherein the first sequence number includes the data packet set by the sending device to be sent.
  • the packet loss on the air interface between the WLAN access device and the receiving device can be determined by the mechanism of the WLAN.
  • the sending device sequentially allocates data packets with SNs of 3, 4, 7, and 8 in the LTE network.
  • the first sequence number 1, 2, 3, 4 (where the data packet is a PDCP PDU and the SN is a second serial number) is sent to the WLAN access device.
  • the WLAN access device stores the data packet in the cache, parses the data packet, and then follows the 802.11.
  • the protocol stipulates that the parsed data packet is sent to the receiving device, that is, the data packet containing only the second serial number.
  • the data packet with the second sequence number of 7 is lost during the sending process, that is, the data packet corresponding to the first serial number of 3 is corresponding to the data packet payload.
  • a data packet after the number of retransmissions of the data packet of the second sequence number 7 reaches the maximum number of retransmissions, and the acknowledgment message ACK (Acknowledgement) sent by the receiving device is still not received, The WLAN access device discards the second sequence number 7 packet.
  • the first mapping relationship includes the first sequence number that the WLAN access device parses and saves the data packet that is received by the sending device and includes the first sequence number.
  • a mapping relationship with the data packet that is, the WLAN access device can know that the data packet with the second sequence number of 7 corresponds to the data packet with the first sequence number of 3, so the WLAN access device is in the second serial number.
  • the transmitting device may be notified to request the transmitting device to retransmit the data packet of the first sequence number 3.
  • the sending device determines, according to the number of the lost data packets and the first serial number of the lost data packet, the lost data packet.
  • the sending device retransmits the lost data packet that includes the first sequence number to the WLAN access device, and then sends the WLAN access device to the receiving device.
  • the serial number of the lost data packet further includes the lost data. a second sequence number of the packet, where the sending device determines a second sequence number of the lost data packet according to a mapping relationship between the preset first sequence number and the second sequence number, where the second sequence number includes the sending device and the receiving a sequence number that can be identified by the device, and the sending device sends the lost data packet including the second serial number to the receiving device by using a cellular communication link;
  • the retransmission of the lost data packet includes two options. One is to directly re-deliver the lost data packet containing the first serial number to the WLAN access device through the WLAN link; According to the mapping relationship between the first serial number and the second serial number, the second serial number of the lost data packet is determined, and the data packet including the second serial number is sent and sent through the cellular communication link. Receive equipment.
  • the WLAN access device determines the lost data packet, and then the number of lost data packets and the first sequence of the lost data packet. The number is fed back to the transmitting device, which retransmits the lost data packet containing the first sequence number to the WLAN access device or retransmits the lost data packet containing the second sequence number to the receiving device.
  • the transmitting device can judge the two transmission links according to actual conditions, and then select a high-quality transmission link to retransmit the lost data packet, thereby improving the transmission efficiency of the network.
  • the sending device receives, by using the WLAN access device, a status report that includes the number of lost data packets and the first identifier of the lost data packet.
  • the sending device may also receive, by using the receiving device, the lost data packet.
  • a status report of the number and the first identifier of the lost data packet is described in detail below.
  • the sending device receives, by the receiving device, a status report that includes the number of lost data packets and the first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second The serial number includes a serial number of the receiving device that sorts and confirms the second serial number of the received data packet, wherein the second serial number includes a serial number that can be recognized by both the sending device and the receiving device.
  • the second sequence number is a data packet sequence number that can be identified by both the sending device and the receiving device in the LTE network, and the receiving device determines that the lost data packet includes: for example, the data packet is a PDCP PDU, and the second serial number is an SN, and the sending device needs Transmitting a PDCP PDU with SNs of 3, 4, 5, 6, 7, and 8 to the receiving device, and distributing the data packets of the SNs 3, 4, 7, and 8 to the WLAN access device, where the WLAN access device receives the above After the PDCP PDU, the PDCP PDU with the SNs of 3, 4, 7, and 8 is sent to the receiving device; the transmitting device sends the PDCP PDUs with the SNs of 5 and 6 to the receiving device through the LTE network.
  • the receiving device sorts the SNs of the PDCP PDUs after receiving the PDCP PDUs through the two links. If an out-of-order condition is found, for example, after receiving the PDCP PDUs with the SN of 6, the PDCP PDUs with the SN of 8 are received. The timer is started for the PDCP PDU with the SN of 7. If the PDCP PDU with the SN of 7 is not received after the timer expires, the loss is confirmed. At this time, the receiving device can feed back to the sending device and request to retransmit the PDCP PDU with the SN of 7.
  • the data packet with the second serial number 7 in the above process may be in the WLAN. If the interface between the access device and the receiving device is lost, it may be lost on the air interface between the WLAN access device and the sending device. If two packets are found lost on the receiving device, it may be The interface between the WLAN access device and the receiving device is lost, and the other is lost on the air interface between the WLAN access device and the sending device. In either case, the method provided by the embodiment of the present invention can be used for retransmission. .
  • the sending device determines, according to the number of the lost data packets and the first sequence number of the lost data packet, a lost data packet.
  • the sending device retransmits the lost data packet that includes the second serial number to the receiving device by using a cellular communication link; or the sequence number of the lost data packet further includes a first serial number of the lost data packet. Determining, by the transmitting device, a first sequence number of the lost data packet according to a mapping relationship between the preset first sequence number and the second sequence number, where the first sequence number includes the sending device and the WLAN access device can identify a sequence number; the sending device sends a lost data packet including the first sequence number to the WLAN access device;
  • retransmitting the lost data packet includes two options, one is to directly re-deliver the lost data packet containing the second serial number to the receiving device through the cellular communication link; According to the mapping relationship between the first serial number and the second serial number, the first serial number of the lost data packet is determined, and the data packet containing the first serial number is sent to the WLAN access device through the WLAN link, and then The WLAN access device sends the WLAN access device to the receiving device.
  • the receiving device sorts the second serial number of the received data packet to determine the lost data packet, and the sending device receives the status report including the first identifier of the lost data packet by the receiving device, and the sending device determines the lost data. Packet and retransmit the lost packet. In this way, the receiving device sorts the second serial number of the received data packet to determine the lost data packet, which reduces the overhead of the system and improves the efficiency of network transmission.
  • the sequence number of the data packet is identifiable by both the sending device and the receiving device, and the WLAN access device cannot identify, that is, the second sequence described in the embodiment of the present invention. Therefore, the present invention adds a first sequence number that the WLAN access device and the transmitting device can receive to the data packet, so that the WLAN access device can identify the data packet and perform corresponding operations. However, the present invention also protects the ability to perform enhancements to WLAN access devices, The WLAN access device can identify the second sequence number of the data packet, so that the WLAN access device performs the operations of parsing and sorting the data packet that only includes the second sequence number.
  • the specific implementation is similar to the foregoing embodiment, and details are not described herein.
  • the sending device when the sending device distributes the data packet to the WLAN access device, the buffer space of the WLAN access device and the sending capability and rate of the WLAN access device need to be fully considered.
  • the data transmission rate is slow due to fierce competition. If the sending device incorrectly estimates the transmission rate and buffer space of the WLAN access device, the WLAN access device is connected to the WLAN access device.
  • FIG. 6 another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the sending device receives a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet; the status report is further a second identifier, where the second identifier is used to indicate a sequence number of a maximum data packet received by the receiving device;
  • the status report further includes a second identifier, where the second identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and after the sending device obtains the serial number of the largest data packet received by the receiving device, the sending device can learn the sending device. The case that the sent data packet is received by the receiving device, so that the sending device can intelligently transmit the data packet that needs to be sent subsequently.
  • the sending device determines, according to the number of the lost data packets and the first identifier of the lost data packet, a lost data packet.
  • the sending device retransmits the lost data packet.
  • the sending device determines, according to the second identifier, a data size that is sent to the WLAN access device, and determines, according to the size, the number of data packets sent by the sending device to the WLAN access device.
  • the sending device can send more data packets through the WLAN network, and after the sending device knows the maximum packet sequence number received by the receiving device, Determine the number of packets that can also be sent to the WLAN access device.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • the sending device determines the number of data packets to be sent to the WLAN access device, the corresponding number of new data packets may be sent to the WLAN access device; when the sending device determines the data packet that can be sent to the WLAN access device When the number is 0, the transmitting device does not send a new data packet to the WLAN access device, or the transmitting device waits for the WLAN access device to receive a new data packet and then sends the data packet.
  • the status report further includes a second identifier, where the second identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and the sending device determines, according to the second identifier, that the information can be sent to the WLAN access device.
  • the sending device sends a new data packet to the WLAN access device according to the determined data size, so that the sending device sends the WLAN access device the number of data packets that the WLAN access device can receive, Improve system reliability.
  • the second identifier is used to indicate the sequence number of the largest data packet received by the receiving device.
  • the second identifier is used.
  • the data sequence size of the WLAN access device and the first sequence number of the data packet that the WLAN access device receives the acknowledgment message sent by the eNB which is described in detail below.
  • the sending device receives a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet; The report further includes a second identifier, where the second identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and the second identifier includes a data size requested by the WLAN access device and a WLAN access device.
  • the data size requested by the WLAN access device includes any one of the following five types: a minimum data size requested by the WLAN access device for the receiving device, and the WLAN access device is the receiving The data size requested by the corresponding access type of the device, the data size requested by the WLAN access device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the WLAN a data size requested by the access device for the corresponding access type of the receiving device, and a minimum data size requested by the WLAN access device for the receiving device, and the WLAN access device is a corresponding bearer of the receiving device The requested data size;
  • the eNB is the eNB and the receiving device is the UE.
  • each UE can establish up to eight data bearers at the same time, corresponding to eight QoS (Quality of Service) requirements.
  • QoS Quality of Service
  • On the WLAN side only Four QoS levels, corresponding to four access types AC (Access Category), including BK (Background), BE (Best Effort, Best Effort), VI (Video, Video), VO (Voice, Voice), so the bearer needs to be mapped to the access type.
  • a buffer space is opened for each UE, and a buffer space corresponding to each UE is logically divided into four parts, corresponding to four types of access types.
  • the WLAN module inside the UE correspondingly divides the buffer space into four parts, corresponding to four types of access types.
  • the WLAN access device feeds back the minimum data size requested by the WLAN access device for the receiving device to the sending device, so that the sending device must send the access device not less than the minimum request.
  • the data of the data size is given to the WLAN access device, so that when the WLAN access device is idle, no new data arrives, and the WLAN resource is wasted; the WLAN access device uses the WLAN access device as the corresponding device.
  • the data size of the access type request is fed back to the sending device, so that the sending device can determine to send the data of the corresponding size to the WLAN access device according to the data size of the access type request of the receiving device, and the sending device is prevented from being sent.
  • the WLAN access device feeds back the data size of the corresponding bearer request of the WLAN access device to the sending device, so that the sending device can request the bearer for the receiving device.
  • the data size sends the corresponding size data to the WLAN access device to avoid packet overflow.
  • the WLAN access device determines the data type of the corresponding access type or the corresponding bearer of the receiving device, the WLAN access device should be smaller than the WLAN access device for the receiving device.
  • the type or the size of the buffer space allocated by the bearer when the sending device receives the data type of the access type or the bearer request, the data size may be considered as the access type or the bearer can receive
  • the maximum data size that is, the size of the data sent by the sending device according to the request should be less than or equal to the requested data size, thereby achieving the purpose of avoiding buffer overflow.
  • the receiving device as the UE as an example, since each UE can have up to 8 data bearers and only 4 access types, multiple bearers may be mapped to the same access type.
  • the WLAN access device feeds back the data size requested by the corresponding access type of the receiving device, the sending device can know the data bearer and the access type.
  • the mapping relationship so after the sending device receives the data size of the corresponding type request of the receiving device, the data size of the corresponding data type can be sent to the two data bearers respectively, and the sum of the corresponding data sizes sent by the two data bearers should be
  • the data size of the access type is smaller than the data size of each type of bearer determined by the sending device; if the WLAN access device feeds back the data size of the corresponding bearer request of the receiving device, the WLAN access device Knowing the cache information of each type of access type, and the mapping relationship between the bearer and the access type, the WLAN access device can define the size of the buffer space of the two data bearers, and determine the two as the two
  • the data bearer separately requests the size of the received data, that is, the data size of each type of bearer request is determined by the WLAN access device at this
  • the sending device determines, according to the number of the lost data packets and the first identifier of the lost data packet, a lost data packet.
  • the sending device determines, according to the number of the lost data packets and the first sequence number of the lost data packet, the lost data packet;
  • the sending device retransmits the lost data packet.
  • the sending device retransmits the lost data packet that includes the first sequence number to the WLAN access device; or the sending device sends the determined information by using a cellular communication link. Losing data packets to the receiving device;
  • the sending device retransmits the first serial number Losing the data packet to the WLAN access device, and then sending the WLAN access device to the receiving device; or the serial number of the lost data packet further includes a second serial number of the lost data packet, the sending device according to the preset a mapping relationship between the serial number and the second serial number determines a second serial number of the lost data packet, the second serial number includes a serial number that can be identified by the sending device and the receiving device, and the transmitting device passes the cellular communication chain Transmitting, by the path, the lost data packet containing the second serial number to the receiving device;
  • the sending device determines, according to the second identifier, a data size that is sent to the WLAN access device, and determines, according to the size, the number of data packets sent by the sending device to the WLAN access device.
  • the sending device may also be smaller than the maximum first sequence that is cached before the deletion.
  • Determining the number of data packets sent to the WLAN access device includes: calculating, by the sending device, the data size that has been distributed to the WLAN access device but has not received the acknowledgement, and then using the received data size of the WLAN access device. Subtracting the data size, it is concluded that the sending device can newly distribute the data size to the WLAN access device. Since the size of the encapsulated data packet has been determined, the size of the data that can be newly sent can be converted. The number of packets that can be sent.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • the second identifier includes a data size requested by the WLAN access device and a sequence number of a data packet that the WLAN access device receives the acknowledgement message sent by the receiving device, where the sending device is configured according to the The second identifier determines the number of data packets that can be sent to the WLAN access device, so that when the sending device distributes the data packet to the WLAN access device, the number of distributed data packets does not occur, and the WLAN access device buffer overflows. At the same time, it can ensure that the wireless resources on the WLAN side are fully utilized.
  • the second identifier when the sending device receives the status report by using a WLAN access device, the second identifier includes a data size requested by the WLAN access device and a WLAN connection. The maximum number of the data packet of the acknowledgment message sent by the device to the receiving device is received.
  • the second identifier when the sending device receives the status report by using the receiving device, the second identifier includes the receiving device receiving the The maximum second serial number of the data packet is described in detail below.
  • another embodiment of the data transmission method in the embodiment of the present invention includes:
  • the sending device receives the status report according to a preset period by using a receiving device, where the status report includes a first identifier of a lost data packet, and the status report further includes a second identifier, where the second identifier includes the Receiving a maximum second serial number of the data packet received by the device, where the second serial number includes a serial number that can be recognized by the sending device and the receiving device;
  • each data packet will contain a second serial number, that is, a serial number that both the transmitting device and the receiving device can recognize, and the maximum second serial number of the data packet received by the receiving device is that the receiving device receives one or more data packets. Then, when the feedback status report is required, the largest second serial number in the second serial number of the received data packet is selected as the feedback information. Since the sending device sends the data packet to the receiving device when the transmitting device and the WLAN access device send the data packet to the receiving device, the sending device receives the maximum second serial number of the data packet fed back by the receiving device. At this time, you can know the status of the receiving device receiving the data packet at this time.
  • the receiving device feeds back a status report to the sending device according to a preset period.
  • the second sequence number is a sequence number that can be identified by both the sending device and the receiving device in the LTE network, for example, the PDCP SN, and the largest second sequence number of the data packet received by the receiving device may be accessed from the WLAN through the WLAN network. Received by the device, it may also be received from the sending device through the LTE network.
  • the sending device determines, according to the number of the lost data packets and the first identifier of the lost data packet, a lost data packet.
  • the sending device determines, according to the number of the lost data packets and the first sequence number of the lost data packet, the lost data packet;
  • the sending device retransmits the lost data packet.
  • the sending device retransmits the lost data packet that includes the second serial number to the receiving device by using a cellular communication link; or the serial number of the lost data packet is further The first sequence number of the lost data packet is determined by the sending device, and the sending device determines the first serial number of the lost data packet according to the mapping relationship between the preset first serial number and the second serial number, where the first serial number includes the sending a serial number that can be identified by the device and the WLAN access device; the sending device sends the lost data packet that includes the first serial number to the WLAN access device;
  • the sending device determines, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet, where the first serial number is the sending device and the WLAN.
  • the serial number that can be recognized by the device;
  • the transmitting device prestores the correspondence between the first sequence number and the second sequence number, so that the largest first sequence number corresponding to the largest second sequence number can be obtained. If the data packet of the maximum second sequence number is sent by using the LTE network in the cellular communication, the sending device searches for the maximum second sequence number that is only the largest second sequence number and is sent by the WLAN network, thereby obtaining the maximum The largest first serial number corresponding to the second serial number.
  • the sending device is configured to: according to the first sequence number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending device has been sent Calculating, by the WLAN access device, a data packet size, a rate at which the WLAN access device sends a data packet to the receiving device;
  • the sending device can calculate the rate at which the WLAN access device sends the data packet to the receiving device, and the specific calculation manner is: the size of the data packet sent by the sending device to the WLAN access device minus The size of the data packet between the maximum first sequence number successfully transmitted by the WLAN access device and the first sequence number sent by the sending device to the WLAN access device at the time, that is, the WLAN access is obtained.
  • the size of the data packet that has been successfully sent by the device to the receiving device in the feedback period, and the size of the data packet that has been successfully sent to the receiving device is divided by the feedback period, and then the WLAN access device sends the data packet to the WLAN access device.
  • the rate of the receiving device is divided by the feedback period, and then the WLAN access device sends the data packet to the WLAN access device.
  • the sending device determines, according to a rate at which the WLAN access device sends a data packet to the receiving device, the number of data packets sent to the WLAN access device.
  • the sending device may determine the number of data packets distributed to the WLAN access device according to the rate at which the WLAN access device transmits the data packet and the size of the data packet that the transmitting device needs to subsequently transmit.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • the second identifier includes a maximum second sequence number of the data packet received by the receiving device, and the sending device calculates a rate at which the WLAN access device sends the data packet, and further determines to send the data packet to the WLAN access device.
  • the transmitting device can estimate the rate of transmitting the data packet on the WLAN side, accurately determine the number of data packets that can be distributed to the WLAN access device, and can avoid the buffer overflow of the WLAN access device, and also fully utilize the WLAN side. Wireless resources.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the sequence number includes a sequence number that the WLAN access device can identify;
  • the WLAN access device sends a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, and cause the sending device to resend the lost data packet;
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, and the sequence number of the lost data packet includes a first sequence number of the lost data packet.
  • the first sequence number of the lost data packet includes a sequence number that the WLAN access device sorts and confirms the first sequence number of the received data packet, wherein the first sequence number includes the sending device to the data packet. a sequence number that can be identified by the sending device and the WLAN access device; the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the WLAN access device sends a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, and cause the sending device to resend the lost data packet;
  • the WLAN access device receives, by the sending device, retransmission of a lost data packet that includes the first sequence number.
  • the WLAN access device sends the lost data packet to the receiving device.
  • the lost data packet may be sent to the receiving device to avoid data packet loss.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, and the sequence number of the lost data packet includes a first sequence number of the lost data packet,
  • the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the WLAN access device receiving the received from the sending device
  • the data packet of the first sequence number is parsed and saved, and the mapping relationship between the first sequence number and the data packet is saved
  • the lost data packet includes the WLAN access device sending the parsed data packet to the receiving device and exceeding a preset retransmission a data packet whose number of times still fails to receive the acknowledgment message;
  • the first sequence number includes a sequence number that can be recognized by the sending device and the WLAN access device added by the sending device to the data packet;
  • the lost data packet is a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the WLAN access device sends a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, and cause the sending device to resend the lost data packet;
  • the WLAN access device receives, by the sending device, retransmitting a lost data packet that includes the first sequence number.
  • the WLAN access device sends the lost data packet to the receiving device.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the sequence number includes a sequence number that the WLAN access device can identify;
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet; a sequence number of the lost data packet And including a first sequence number of the lost data packet, where the first sequence number of the lost data packet includes a sequence number that the WLAN access device sorts and confirms the first sequence number of the received data packet to be lost; wherein The first sequence number includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; the lost data packet is that the sending device sends a data packet to the WLAN access device.
  • the lost data packet includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; the lost data packet is that the sending device sends a data packet to the WLAN access device.
  • the WLAN access device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet; a sequence number of the lost data packet And including a first sequence number of the lost data packet, where the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the WLAN access device a mapping relationship between the first sequence number and the data packet that is parsed and saved by the data packet including the first sequence number received from the sending device; the lost data packet includes the WLAN access device transmitting and parsing to the receiving device And the data packet that exceeds the preset number of retransmissions and still fails to receive the acknowledgement message; wherein the first sequence number includes the sending device and the WLAN access device added by the sending device to the data packet The identifiable serial number; wherein the lost data packet is a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the WLAN access device sends a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet; the status report further includes a second identifier.
  • the second identifier is used to indicate a data size requested by the WLAN access device and a sequence number of a data packet that the WLAN access device receives an acknowledgement message sent by the receiving device; wherein the WLAN access device
  • the requested data size includes any one of the following five types: a minimum data size requested by the WLAN access device for the receiving device, and a data size requested by the WLAN access device for a corresponding access type of the receiving device.
  • the data size of the WLAN access device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the corresponding WLAN access device for the receiving device a data size of the access type request, and a minimum data size requested by the WLAN access device for the receiving device, and the WLAN access device is the receiving device
  • the WLAN access device receives, by the sending device, retransmission of a lost data packet that includes the first sequence number.
  • the WLAN access device sends the lost data packet to the receiving device.
  • the WLAN access device receives a new data packet that is sent by the sending device to the WLAN access device according to the second identifier.
  • the WLAN access device sends the new data packet to a receiving device.
  • the new data packet may be forwarded to the receiving device.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the receiving device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data packet of the receiving device
  • the second serial number is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is the transmitting device to the receiving device a data packet lost when the data packet is sent, or a data packet lost when the WLAN access device sends the data packet to the receiving device;
  • the receiving device sends a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data.
  • the first identifier of the packet and the number of the lost data packets determine a lost data packet, and retransmit the lost data packet;
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the receiving device determines a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data packet of the receiving device.
  • the second serial number is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is lost when the transmitting device sends the data packet to the receiving device a data packet, or a data packet lost when the WLAN access device sends the data packet to the receiving device;
  • the receiving device sends a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data.
  • the first identifier of the packet and the number of the lost data packets determine a lost data packet, and retransmit the lost data packet;
  • the status report further includes a second identifier, where the second identifier includes the received by the receiving device a maximum second sequence number of the data packet, so that the sending device determines, according to the second identifier, the number of data packets sent to the WLAN access device;
  • the receiving device receives, by the sending device, a retransmission packet that includes the second sequence number by using a cellular communication link, or the receiving device receives a second sequence that is retransmitted by the WLAN access device. Number of lost packets;
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the sending device receives a status report, where the status report includes a data packet identifier, and the data The packet identifier is used to indicate the serial number of the largest data packet received by the receiving device;
  • the status report includes a data packet identifier, where the data packet identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and after the sending device obtains the serial number of the largest data packet received by the receiving device, the sending device can learn the sending device. The case that the sent data packet is received by the receiving device, so that the sending device can intelligently send the data packet that needs to be sent later.
  • the sending device determines, according to the data packet identifier, a data size that is sent to the WLAN access device, and determines, according to the size, the number of data packets sent by the sending device to the WLAN access device.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • the status report includes a data packet identifier, where the data packet identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and the sending device determines, according to the data identifier, data that can be sent to the WLAN access device.
  • the size the sending device sends a new data packet to the WLAN access device according to the determined data size, so that the sending device sends the WLAN access device the number of data packets that the WLAN access device can receive, and the system is improved. Reliability.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the sending device receives the status report by using a WLAN access device, where the data packet identifier includes a data size requested by the WLAN access device and a maximum data packet that the WLAN access device receives an acknowledgement message sent by the receiving device.
  • the serial number of the WLAN access device wherein the data size requested by the WLAN access device includes any one of the following five types: the minimum data size requested by the WLAN access device for the receiving device, and the WLAN access device is The data size of the corresponding access type request of the receiving device, the data size of the WLAN access device requesting the corresponding bearer of the receiving device, and the minimum data size and location requested by the WLAN access device for the receiving device a data size requested by the WLAN access device for the corresponding access type of the receiving device, and a minimum data size requested by the WLAN access device for the receiving device, and the WLAN access device is the receiving device The size of the data corresponding to the request;
  • the sending device determines, according to the data packet identifier, a data size that is sent to the WLAN access device, and determines, according to the size, the number of data packets sent by the sending device to the WLAN access device.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the sending device receives the status report by using a receiving device, where the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device, where the second serial number includes the sending device and receiving The serial number that the device can recognize;
  • the sending device determines, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet, where the first sequence number includes the sending device and a serial number that can be identified by the WLAN access device;
  • the sending device is configured to: according to the first sequence number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending device has been sent Calculating, by the WLAN access device, a data packet size, a rate at which the WLAN access device sends data to the receiving device;
  • the sending device determines, according to a rate at which the WLAN access device sends data to the receiving device, a quantity of data packets that can be sent to the WLAN access device.
  • the sending device sends a new data packet to the WLAN access device according to the determined quantity.
  • another embodiment of the method for data transmission in the embodiment of the present invention includes:
  • the WLAN access device sends a status report to the sending device, where the status report includes the number.
  • the data packet identifier is used to indicate the data size requested by the WLAN access device and the maximum sequence number of the data packet that the WLAN access device receives the acknowledgement message sent by the receiving device; wherein the WLAN access
  • the data size requested by the device includes any one of the following five types: the minimum data size requested by the WLAN access device for the receiving device, and the data requested by the WLAN access device for the corresponding access type of the receiving device.
  • the data size of the corresponding access type request, and the minimum data size requested by the WLAN access device for the receiving device and the data size requested by the WLAN access device for the corresponding bearer of the receiving device Determining, by the sending device, the number of data packets sent to the WLAN access device according to the data packet identifier, and causing the sending device to determine the number according to the determined number Transmitting a new data packet to the WLAN access device;
  • the WLAN access device receives, by the WLAN access device, a new data packet that is sent by the sending device to the WLAN access device according to the identifier of the data packet;
  • the WLAN access device sends the new data packet to a receiving device.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the receiving device sends a status report to the sending device according to a preset period, where the status report includes a data packet identifier, where the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device, where The second sequence number includes a sequence number that can be identified by the sending device and the receiving device, so that the sending device determines, according to the data packet identifier, the number of data packets sent to the WLAN access device.
  • the receiving device receives a new data packet sent by the sending device, or the sending device receives a new data packet forwarded by the WLAN access device.
  • an embodiment of a sending device in an embodiment of the present invention includes:
  • the receiving unit 2001 is configured to receive a status report, where the status report includes a packet loss An identifier and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet, and the serial number includes a serial number that the wireless local area network WLAN access device can recognize;
  • the first determining unit 2002 is configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, the lost data packet;
  • a retransmission unit 2003 configured to resend the lost data packet
  • another embodiment of the sending device in the embodiment of the present invention includes:
  • the receiving unit 2101 includes: a first receiving subunit 21011, configured to receive the status report by using a WLAN access device; the sequence number of the lost data packet includes a first serial number of the lost data packet, and the lost The first sequence number of the data packet includes a sequence number of the data packet that the WLAN access device sorts to confirm the first sequence number of the received data packet, wherein the first sequence number includes the sending device a sequence number that can be identified by both the sending device and the WLAN access device added by the data packet; the lost data packet is a data packet lost when the sending device sends a data packet to the WLAN access device ;
  • the first determining unit 2102 is configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, the lost data packet;
  • the retransmission unit 2103 includes:
  • a first retransmission subunit 21031 configured to retransmit the determined lost data packet including the first sequence number to the WLAN access device, or send the determined lost data packet to the receiving device by using a cellular communication link ;
  • the receiving unit 2101 includes: a second receiving subunit 21012, where the sending device receives the status report by using a WLAN access device; the sequence number of the lost data packet includes a first serial number of the lost data packet.
  • the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the WLAN connection a mapping relationship between a first sequence number and a data packet that is parsed and saved by the device that is received by the sending device and includes the data packet of the first serial number; the lost data packet includes the WLAN access device to the receiving device Sending the parsed data packet and exceeding a preset retransmission number that has not received the acknowledgment message; wherein the first sequence number includes the sending device and the WLAN added by the sending device to the data packet a serial number that can be identified by the access device; wherein the lost data packet is a data packet that is lost when the WLAN access device sends a data packet to the receiving device;
  • the retransmission unit 2103 includes:
  • a second retransmission subunit 21032 configured to retransmit the lost data packet that includes the first sequence number to the WLAN access device, or send the lost data packet that includes the second serial number to the cellular communication link a receiving device, wherein the serial number of the lost data packet further includes a second serial number of the lost data packet, and the sending device determines the lost data packet according to the second mapping relationship between the preset first serial number and the second serial number.
  • a second serial number the second serial number including a serial number that can be recognized by the sending device and the receiving device;
  • the receiving unit 2101 includes: a third receiving subunit 21013, configured to receive the status report by using a receiving device; the sequence number of the lost data packet includes a second serial number of the lost data packet, where the loss The second sequence number of the data packet includes a sequence number that the receiving device sorts and confirms the loss of the second sequence number of the received data packet; wherein the second sequence number includes both the sending device and the receiving device a serial number, the lost data packet is a data packet lost when the sending device sends a data packet to the receiving device, or a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the retransmission unit 2103 includes:
  • a third retransmission subunit 21033 configured to retransmit the lost data packet including the second serial number to the receiving device by using a cellular communication link, or send the lost data packet including the first serial number to the a WLAN access device, wherein the sequence number of the lost data packet further includes a first sequence number of the lost data packet, and the sending device determines the lost data packet according to the second mapping relationship between the first sequence number and the second sequence number.
  • a first serial number wherein the first serial number includes the transmitting device and the The serial number that the WLAN access device can recognize;
  • the receiving unit 2101 includes: a fourth receiving subunit 21014, configured to receive the status report by using a WLAN access device; and the sequence number of the lost data packet includes a second serial number of the lost data packet, where The second sequence number of the lost data packet includes a sequence number that the WLAN access device sorts and confirms the second sequence number of the received data packet, wherein the second sequence number includes the sending device, and the receiving a serial number that can be identified by the device and the WLAN access device; wherein the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the sequence number of the data packet is identifiable by both the sending device and the receiving device, and the WLAN access device cannot identify, that is, the second sequence described in the embodiment of the present invention. Therefore, the present invention adds a first sequence number that the WLAN access device and the transmitting device can receive to the data packet, so that the WLAN access device can identify the data packet and perform corresponding operations. However, the present invention also protects the capability of the WLAN access device to enable the WLAN access device to identify the second sequence number of the data packet, thereby enabling the WLAN access device to receive the data packet containing only the second serial number. Perform operations such as parsing and sorting.
  • the specific implementation is similar to the foregoing embodiment, and details are not described herein.
  • the retransmission unit 2103 includes:
  • a fourth retransmission subunit 21034 configured to retransmit the determined lost data packet including the second serial number to the WLAN access device, or send the determined second sequence included by using a cellular communication link The missing packet of the number is sent to the receiving device.
  • another embodiment of the sending device in the embodiment of the present invention includes:
  • the receiving unit 2201 is configured to receive a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet, the sequence The number includes a serial number that the WLAN access device can identify; the status report further includes a second identifier, where the second identifier is used to indicate a sequence number of the largest data packet received by the receiving device;
  • the first determining unit 2202 is configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, the lost data packet;
  • a retransmission unit 2203 configured to resend the lost data packet
  • the sending device further includes:
  • the second determining unit 2204 is configured to determine, according to the second identifier, a data size that is sent to the WLAN access device, and determine, according to the data size, the number of data packets sent by the sending device to the WLAN access device. ;
  • the sending unit 2205 is configured to send a new data packet to the WLAN access device according to the determined quantity
  • another embodiment of the sending device in the embodiment of the present invention includes:
  • the receiving unit 2301 includes: a fifth receiving subunit 23015, configured to receive the status report by using a WLAN access device;
  • the second identifier includes a data size requested by the WLAN access device, and a WLAN connection The maximum sequence number of the data packet that the ingress device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection a minimum data size requested by the ingress device for the receiving device and a data size requested by the WLAN access device for the corresponding bearer of the receiving device;
  • the receiving unit 2301 includes: a sixth receiving subunit 23016, configured to receive the status report by using a receiving device, where the second identifier includes a data packet received by the receiving device a second serial number; wherein the second serial number includes a serial number that can be recognized by both the sending device and the receiving device;
  • the first determining unit 2302 is configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, a lost data packet;
  • a retransmission unit 2303 configured to resend the lost data packet
  • the second determining unit 2304 includes:
  • a first determining subunit 23041 configured to determine, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet, where the first sequence number includes the a serial number that can be recognized by both the sending device and the WLAN access device;
  • a second determining subunit 23042 configured to: according to the first serial number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending Calculating, by the device, the size of the data packet sent by the WLAN access device, and calculating a rate at which the WLAN access device sends the data packet to the receiving device;
  • a third determining sub-unit 23043 configured to determine, according to a rate at which the WLAN access device sends data to the receiving device, a data size that is sent to the WLAN access device;
  • an embodiment of a WLAN access device in an embodiment of the present invention includes:
  • a determining unit 2401 configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a sequence number that the WLAN access device can identify;
  • the first sending unit 2402 is configured to send a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, And causing the sending device to resend the lost data packet;
  • another embodiment of a WLAN access device in an embodiment of the present invention includes:
  • a determining unit 2501 configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a serial number that the WLAN access device can identify;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the WLAN access device sorting and confirming the first sequence number of the received data packet to be lost.
  • a sequence number wherein the first sequence number includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; the lost data packet is the sending device The data packet lost by the WLAN access device when sending the data packet;
  • a first sending unit 2502 configured to send a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, and cause the sending device to resend the lost data packet;
  • the WLAN access device further includes:
  • the first receiving unit 2503 is configured to receive, by the sending device, resend the lost data packet that includes the first serial number;
  • a second sending unit 2504 configured to send the lost data packet to the receiving device
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet
  • the first sequence number of the lost data packet includes a sequence number determined by the WLAN access device according to the first mapping relationship.
  • the first mapping relationship includes a mapping relationship between the first sequence number and the data packet that the WLAN access device parses and saves the data packet that is received by the sending device and includes the first sequence number; the lost data packet And the data packet that the WLAN access device sends the parsed data packet to the receiving device and fails to receive the acknowledgement message after the preset number of retransmissions; wherein the first serial number is a sequence number that is identifiable by both the sending device and the WLAN access device added by the sending device to the data packet; wherein the lost data packet is when the WLAN access device sends the data packet to the receiving device Lost data packet;
  • the WLAN access device further includes:
  • the second receiving unit 2505 is configured to receive, by the sending device, resend the lost data packet that includes the first serial number
  • a third sending unit 2506, configured to send the lost data packet to the receiving device
  • another embodiment of the WLAN access device in the embodiment of the present invention includes:
  • a determining unit 2601 configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a serial number that the WLAN access device can identify;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the WLAN access device sorting and confirming the first sequence number of the received data packet to be lost.
  • a sequence number wherein the first sequence number includes a sequence number that the sending device adds to the data packet and the WLAN access device can identify; the lost data packet is the sending device The data packet lost by the WLAN access device when sending the data packet;
  • the first sending unit 2602 is configured to send a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the The number of lost data packets and the first identifier of the lost data packet determine a lost data packet, and causes the sending device to resend the lost data packet; the status report further includes a second identifier, the second identifier a sequence number for indicating a data size requested by the WLAN access device and a maximum number of data packets that the WLAN access device receives the acknowledgement message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device for the receiving device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access The data size requested by the device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the data requested by the WLAN access device for the corresponding access type of the receiving device a size, and a minimum data size requested by the WLAN access device for the receiving device and a data size requested by the WLAN access device for the corresponding bearer of the receiving device;
  • the WLAN access device further includes:
  • the third receiving unit 2603 is configured to receive a new data packet that is sent by the sending device to the WLAN access device according to the second identifier.
  • a fourth sending unit 2604 configured to send the new data packet to a receiving device
  • an embodiment of a receiving device in an embodiment of the present invention includes:
  • a determining unit 2701 configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data by the receiving device
  • the second serial number of the packet is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is when the transmitting device sends the data packet to the receiving device a lost data packet, or a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the sending unit 2702 is configured to send a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data.
  • the first identifier of the packet and the number of the lost data packets determine a lost data packet, and retransmit the lost data packet;
  • another embodiment of the receiving device in the embodiment of the present invention includes:
  • the determining unit 2801 is configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data by the receiving device
  • the second serial number of the packet is sorted to confirm the missing serial number; wherein the second serial number packet
  • Both the transmitting device and the receiving device can identify the serial number; the lost data packet is a data packet lost when the transmitting device sends the data packet to the receiving device, or the WLAN access device loses when sending the data packet to the receiving device Data packet
  • the sending unit 2802 is configured to send a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data.
  • the first identifier of the packet and the number of the lost data packets determine a lost data packet, and retransmit the lost data packet;
  • the receiving device further includes:
  • the receiving unit 2803 is configured to receive, by the sending device, retransmit the lost data packet that includes the second serial number by using a cellular communication link; or
  • another embodiment of the receiving device in the embodiment of the present invention includes:
  • the determining unit 2901 is configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data by the receiving device
  • the second serial number of the packet is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is when the transmitting device sends the data packet to the receiving device a lost data packet, or a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the sending unit 2902 includes: a sending subunit 29021, configured to send a status report to the sending device according to a preset period; the status report further includes a second identifier, where the second identifier includes the receiving device receiving a maximum second sequence number of the data packet, so that the sending device determines, according to the second identifier, the number of data packets sent to the WLAN access device;
  • any one of the transmitting devices described in the above embodiments, any of the above embodiments A WLAN access device, and any of the receiving devices described above.
  • an embodiment of a sending device in an embodiment of the present invention includes:
  • the receiving unit 3001 is configured to receive a status report, where the status report includes a data packet identifier, where the data packet identifier is used to indicate a sequence number of the largest data packet received by the receiving device;
  • a determining unit 3002 configured to determine, according to the data packet identifier, a data size that is sent to the WLAN access device, and determine, according to the size, a quantity of the data packet sent by the sending device to the WLAN access device;
  • the sending unit 3003 is configured to send a new data packet to the WLAN access device according to the determined quantity
  • another embodiment of the receiving device in the embodiment of the present invention includes:
  • the receiving unit 3101 includes: a first receiving subunit 31011, configured to receive the status report by using a WLAN access device; the data packet identifier includes a data size requested by the WLAN access device, and a WLAN access device The largest serial number of the data packet that received the acknowledgment message sent by the receiving device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access device being the receiving device
  • the data size of the corresponding bearer request, the minimum data size requested by the WLAN access device for the receiving device, and the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN connection a minimum data size requested by the ingress device for the receiving device and a data size requested by the WLAN access device for the corresponding bearer of the receiving device;
  • the receiving unit 3101 includes: a second receiving subunit 31012, configured to receive the status report by using a receiving device, where the data packet identifier includes a maximum second serial number of the data packet received by the receiving device.
  • the second serial number includes a serial number that can be recognized by the sending device and the receiving device;
  • the determining unit 3102 includes:
  • a first determining sub-unit 31021 configured to determine, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet, where the first sequence number includes the a serial number that can be recognized by both the sending device and the WLAN access device;
  • a second determining subunit 31022 configured to: according to the first sequence number that the WLAN access device successfully sends to the receiving device data packet, the period in which the sending device receives the status report by using the receiving device, and the sending Calculating, by the device, the size of the data packet sent by the WLAN access device, and calculating a rate at which the WLAN access device sends data to the receiving device;
  • the third determining subunit 31023 is configured to determine, according to a rate at which the WLAN access device sends data to the receiving device, a quantity of data packets sent to the WLAN access device.
  • the sending unit 3103 is configured to send a new data packet to the WLAN access device according to the determined quantity.
  • an embodiment of a WLAN access device in an embodiment of the present invention includes:
  • the first sending unit 3201 is configured to send a status report to the sending device, where the status report includes a data packet identifier, where the data packet identifier is used to indicate a data size requested by the WLAN access device, and the WLAN access device receives the receiving The maximum sequence number of the packet of the acknowledgment message sent by the device;
  • the data size requested by the WLAN access device includes any one of the following five types:
  • the minimum data size requested by the WLAN access device for the receiving device, the data size requested by the WLAN access device for the corresponding access type of the receiving device, and the WLAN access The data size requested by the device for the corresponding bearer of the receiving device, the minimum data size requested by the WLAN access device for the receiving device, and the data requested by the WLAN access device for the corresponding access type of the receiving device a size, and a minimum data size requested by the WLAN access device for the receiving device and a data size requested by the WLAN access device for a corresponding bearer of the receiving device; so that the sending device is configured according to the data packet Identifying, by the identifier, the number of data packets sent to the WLAN access device, and causing the sending device to send a new data packet to the WLAN access device according to the determined quantity;
  • the receiving unit 3202 is configured to receive, by the WLAN access device, a new data packet that is sent by the sending device to the WLAN access device according to the data packet identifier.
  • a second sending unit 3203 configured to send the new data packet to a receiving device
  • a sending unit configured to send a status report to the sending device according to a preset period, where the status report includes a data packet identifier, where the data packet identifier includes a maximum second sequence number of the data packet received by the receiving device,
  • the second sequence number includes a sequence number that can be identified by both the sending device and the receiving device, so that the sending device determines the number of data packets to be sent to the WLAN access device according to the data packet identifier.
  • the WLAN access device may be a WLAN module of the WLAN AC and the terminal, or a WLAN AP, and the WLAN access device may be a WLAN module and a terminal (such as a UE).
  • the WLAN module of the terminal; the receiving device may be a terminal (such as a UE) or a base station (such as an eNB).
  • the sending device is a base station
  • the receiving device is a terminal
  • the WLAN access device is a WLAN AC and a WLAN module of the terminal, or the WLAN access device is a WLAN AP and a WLAN module of the terminal
  • the receiving device is a base station
  • the WLAN access device is a WLAN AC and a WLAN module of the terminal
  • the WLAN access device is a WLAN AP and a WLAN module of the terminal.
  • the transmitting device includes a transmitter 3301, a receiver 3302, a processor 3303, and a memory 3304.
  • the transmitter 3301, the receiver 3302, the processor 3303, and the memory 3304 may also be connected by a bus, or may be connected by other direct or indirect connection manners, which is not specifically limited in this embodiment of the present invention.
  • the sending device in the embodiment of the present invention may be a terminal device or a base station. Both the transmitter and the receiver involved in the embodiments of the present invention can implement air interface transmission and logical link transmission.
  • the transmitting device according to an embodiment of the present invention may have more or less components than those shown in FIG. 33, may combine two or more components, or may have different component configurations or settings, and each component may include Hardware, software, or a combination of hardware and software implementations of one or more signal processing and/or application specific integrated circuits.
  • the receiver 3302 is configured to receive a status report, where the status report includes a first identifier of the lost data packet and a number of lost data packets; the first identifier of the lost data packet includes a sequence number of the lost data packet, where The serial number includes a serial number that the wireless local area network WLAN access device can recognize;
  • the processor 3303 is configured to determine, according to the number of the lost data packets and the first identifier of the lost data packet, the lost data packet;
  • the transmitter 3301 is configured to resend the lost data packet.
  • the receiver 3302 is further configured to receive the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the lost data packet
  • the first sequence number includes a sequence number of the data packet that the WLAN access device sorts to confirm the first sequence number of the received data packet, wherein the first sequence number includes the sending device to the a sequence number that can be identified by both the sending device and the WLAN access device added by the data packet;
  • the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the transmitter 3301 is further configured to retransmit the determined lost data packet including the first sequence number to the WLAN access device, or send the determined lost data packet to the receiving device by using a cellular communication link.
  • the receiver 3302 is further configured to receive the status report by using a WLAN access device; the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the lost data packet
  • the first sequence number includes a sequence number determined by the WLAN access device according to the first mapping relationship, where the first mapping relationship includes the WLAN access device receiving the first sequence number received from the sending device.
  • the lost data packet includes the WLAN access device sending the parsed data packet to the receiving device and failing to receive the acknowledgement after exceeding the preset retransmission times a data packet of the message; wherein the first sequence number includes a sequence number that the sending device adds to the data packet and that is identifiable by the sending device and the WLAN access device; wherein the lost data packet a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the transmitter 3301 is further configured to retransmit the lost data packet that includes the first serial number to the WLAN access device, or send the lost data packet that includes the second serial number to the receiving by using a cellular communication link.
  • the device wherein the sequence number of the lost data packet further includes a second sequence number of the lost data packet, and the sending device determines the lost data packet according to the second mapping relationship between the preset first sequence number and the second sequence number.
  • the second serial number includes a serial number that can be recognized by both the transmitting device and the receiving device.
  • the receiver 3302 is further configured to receive the status report by using a WLAN access device;
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the lost data packet
  • the first sequence number includes a sequence number of the data packet that the WLAN access device sorts to confirm the first sequence number of the received data packet, wherein the first sequence number includes the sending device to the a sequence number that can be identified by both the sending device and the WLAN access device added by the data packet;
  • the lost data packet is a data packet that is lost when the sending device sends a data packet to the WLAN access device;
  • the transmitter 3301 is further configured to retransmit the determined lost data packet including the first sequence number to the WLAN access device, or send the determined lost data packet to the receiving device by using a cellular communication link.
  • the receiver 3302 is further configured to receive the status report by using a WLAN access device; the sequence number of the lost data packet includes a second sequence number of the lost data packet, the lost data packet The second serial number includes the second of the received data packets by the WLAN access device The serial number is sorted to confirm the lost serial number; wherein the second serial number includes a serial number that can be recognized by the sending device, the receiving device, and the WLAN access device; wherein the lost data packet is the sending device a data packet lost when the data packet is sent to the WLAN access device;
  • the transmitter 3301 is further configured to retransmit the determined lost data packet including the second serial number to the WLAN access device, or send the determined second serial number by using a cellular communication link Lost packets to the receiving device.
  • the status report further includes a second identifier, where the second identifier is used to indicate a sequence number of the largest data packet received by the receiving device, and the processor 3303 is further configured to Determining, by the second identifier, a size of data sent to the WLAN access device, and determining, according to the data size, a quantity of data packets sent by the sending device to the WLAN access device;
  • the transmitter 3301 is further configured to send a new data packet to the WLAN access device according to the determined quantity.
  • the receiver 3302 is further configured to receive the status report by using a WLAN access device, where the second identifier includes a data size requested by the WLAN access device and received by the WLAN access device. The largest serial number of the data packet of the acknowledgement message sent by the receiving device;
  • the receiver 3302 is further configured to receive the status report by using a receiving device, where the second identifier includes a maximum second sequence number of the data packet received by the receiving device;
  • the second serial number includes a serial number that can be recognized by both the sending device and the receiving device;
  • the processor 3303 is further configured to determine, according to a maximum second sequence number of the data packet, a maximum first sequence number that is successfully sent by the WLAN access device to the receiving device data packet, where the first sequence number includes the sending a serial number that can be recognized by both the device and the WLAN access device;
  • the size of the sent data packet calculates a rate at which the WLAN access device sends a data packet to the receiving device
  • FIG. 24 to FIG. 26 illustrates the specific structure of the WLAN access device from the perspective of the function module.
  • the following describes the WLAN access device from the hardware perspective in conjunction with the embodiment shown in FIG. The specific structure is explained:
  • the WLAN access device includes a transmitter 3401, a receiver 3402, a processor 3403, and a memory 3404.
  • the transmitter 3401, the receiver 3402, the processor 3403, and the memory 3404 may also be connected by a bus, or may be connected by other direct or indirect connection manners, which is not specifically limited in this embodiment of the present invention.
  • the WLAN access device may have more or less components than those shown in FIG. 34, may combine two or more components, or may have different component configurations or settings, and each component may Hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
  • the processor 3403 is configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a sequence number of the lost data packet, where the serial number includes a sequence number that the WLAN access device can identify;
  • a transmitter 3401 configured to send a status report to the sending device, where the status report includes the number of the lost data packets and the first identifier of the lost data packet, so that the sending device is configured according to the lost data.
  • the number of packets and the first identity of the lost data packet determine a lost data packet and cause the transmitting device to resend the lost data packet.
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet, and the first sequence number of the lost data packet includes the first packet number of the received data packet by the WLAN access device. Sorting the serial number to confirm the missing serial number; wherein the first serial number includes a serial number that the transmitting device adds to the data packet and both the WLAN access device and the WLAN access device; the lost data packet a data packet lost when the sending device sends a data packet to the WLAN access device;
  • a receiver 3402 configured to receive, by the sending device, retransmit the lost data packet that includes the first sequence number
  • the transmitter 3401 is further configured to send the lost data packet to the receiving device.
  • the sequence number of the lost data packet includes a first sequence number of the lost data packet
  • the first sequence number of the lost data packet includes a sequence determined by the WLAN access device according to the first mapping relationship.
  • the first mapping relationship includes the WLAN access device pair sending from the a mapping relationship between the first sequence number and the data packet that is parsed and saved by the data packet that is received by the device and that is saved by the device;
  • the lost data packet includes the parsed data packet sent by the WLAN access device to the receiving device and exceeds The preset number of retransmissions still fails to receive the data packet of the acknowledgment message;
  • the first sequence number includes a sequence number that the sending device adds to the data packet and both the sending device and the WLAN access device can identify
  • the lost data packet is a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • the receiver 3402 is further configured to receive, by the sending device, retransmit the lost data packet that includes the first serial number;
  • the transmitter 3401 is further configured to send the lost data packet to the receiving device.
  • the status report further includes a second identifier, where the second identifier is used to indicate a data size requested by the WLAN access device, and the WLAN access device receives an acknowledgement message sent by the receiving device.
  • the maximum serial number of the packet is used to indicate a data size requested by the WLAN access device, and the WLAN access device receives an acknowledgement message sent by the receiving device. The maximum serial number of the packet;
  • the receiver 3402 is further configured to receive a new data packet that is sent by the sending device to the WLAN access device according to the second identifier.
  • the transmitter 3401 is further configured to send the new data packet to a receiving device.
  • FIG. 27 to FIG. 29 illustrates the specific structure of the receiving device from the perspective of the functional module.
  • the specific structure of the receiving device will be described from the hardware point of view below with reference to the embodiment shown in FIG. 35:
  • the receiving device includes a transmitter 3501, a receiver 3502, a processor 3503, and a memory 3504.
  • the transmitter 3501, the receiver 3502, the processor 3503, and the memory 3504 may be connected by a bus, or may be connected by other direct or indirect connection methods, which is not specifically limited in the embodiment of the present invention.
  • the receiving device in the embodiment of the present invention may be a terminal or a base station, and both the transmitter and the receiver in the embodiments of the present invention can implement air interface transmission and logical link transmission.
  • the receiving device according to an embodiment of the present invention has more or less components than those shown in FIG. 35, two or more components may be combined, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.
  • the processor 3503 is configured to determine a first identifier of the lost data packet, where the first identifier of the lost data packet includes a second serial number of the lost data packet, and the second serial number includes the received data by the receiving device
  • the second serial number of the packet is sorted to confirm the lost serial number; wherein the second serial number includes both the transmitting device and the receiving device capable of identifying the serial number; and the lost data packet is when the transmitting device sends the data packet to the receiving device a lost data packet, or a data packet lost when the WLAN access device sends a data packet to the receiving device;
  • a transmitter 3501 configured to send a status report to the sending device, where the status report includes a first identifier of the lost data packet and a number of the lost data packet, so that the sending device is configured according to the lost data.
  • the first identifier of the packet and the number of the lost data packets determine the lost data packet and retransmit the lost data packet.
  • the receiver 3502 is configured to receive, by the sending device, retransmit the lost data packet that includes the second serial number by using a cellular communication link, or receive the WLAN access device retransmission, including the The missing serial number of the second serial number.
  • the transmitter 3501 is further configured to send a status report to the sending device according to a preset period; the status report further includes a second identifier, where the second identifier includes the receiving device The maximum second sequence number of the received data packet, so that the sending device determines the number of data packets to be sent to the WLAN access device according to the second identifier.
  • the sending device is the eNB
  • the receiving device is the UE
  • the WLAN access device is the WLAN module of the WLAN AP and the UE
  • the data packet is the PDCP PDU
  • the first serial number For example, the Xw-U SN (Xw User plane sequence number) and the second sequence number are PDCP SN.
  • the PDCP layer of the eNB encapsulates the upper layer data into PDCP PDUs, and divides all PDCP PDUs into two parts according to indicators such as network load, delay, and channel environment.
  • the first part of the PDCP PDU is sent to the lower layer RLC, and is sent to the LTE module of the UE via the LTE network; the second part of the PDCP PDU is sent to the WLAN AP and sent to the WLAN module of the UE via the WLAN network.
  • the eNB allocates a consecutive unique sequence number for each or a plurality of PDCP PDUs and a sequence number Xw-U SN that can be recognized between the WLAN AP and the eNB.
  • the eNB sends PDCP PDUs with PDCP SNs of 1, 2, 3, 4, 5, 6, 7, 8 to the UE, where the eNB sets the PDCP SN to 1, 2, 5, and 6.
  • the PDCP PDUs are directly sent to the UE through the LTE link; the eNB allocates Xw-U SNs 1, 2, 3, and 4 to the PDCP PDUs with the PDCP SNs of 3, 4, 7, and 8, and sends them to the AP.
  • the AP After the Xw-U packet reaches the AP, it is stored in the AP's cache.
  • the AP takes an Xw-U packet from the cache, resolves the PDCP PDU, and then sends the PDCP PDU to the UE according to the 802.11 protocol.
  • the PDCP PDU7 In the process of the AP transmitting the PDCP PDU to the UE, the PDCP PDU7 is lost in the sending process, that is, after the number of retransmissions of the AP for the PDCP PDU7 reaches the maximum number of retransmissions, and the acknowledgment ACK sent by the UE is still not received, the AP will use the PDCP. PDU7 is discarded.
  • the AP Since the AP retains the parsed mapping relationship between the PDCP PDU and the Xw-U packet, that is, the AP can know that the PDCP PDU 7 corresponds to the Xw-U packet whose Xw-U SN is 3, so the AP can discard the PDCP PDU 7 at the same time/after
  • the eNB is informed to request the eNB to retransmit the Xw-U packet whose Xw-U SN is 3.
  • the AP may preferentially consider transmitting the PDCP PDU corresponding to the Xw-U packet.
  • the AP may also feed back corresponding indications to the eNB, and the indications of the feedback include D (Desrred, Request) and SNmax (Sequence Number max).
  • D Desrred, Request
  • SNmax Sequence Number max
  • SNmax indicates that the AP confirms the maximum Xw-U SN successfully transmitted to the UE
  • D indicates the data size requested by the AP
  • the eNB receives the indication and first performs some actions according to the SNmax. This action may be to delete the previously cached Xw-U packet, or to clear the mapping relationship between the corresponding PDCP PDU and the saved Xw-U and the PDCP SN. Then, according to D, it is decided how many PDCP PDUs are distributed to the AP.
  • the eNB can know the data size that has been distributed to the AP but has not received the acknowledgment.
  • the eNB determines that the eNB needs to be newly distributed to the AP according to the data size requested by the AP and the data size that the eNB has sent to the AP but has not received the acknowledgment yet.
  • the data size is then determined according to the data size that needs to be newly distributed to the AP, and the determined number of PDCP PDUs are distributed to the AP.
  • the transmitter and the receiver according to the embodiments of the present invention may be two independent devices, or may be a device having a function of a transmitter and a receiver, such as a transceiver.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division.
  • there may be another division manner for example, multiple modules or components may be combined or Can be integrated into another device, or some features can be ignored or not executed.
  • each functional module in each embodiment of the present invention may be integrated into one processing module, and each module may exist physically separately, or two or more modules may be integrated into one module.

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

Abstract

L'invention concerne un procédé de transmission de données pour l'amélioration de la performance de transmission en réseau, consistant : en ce qu'un dispositif d'envoi reçoit un rapport d'état, le rapport d'état comprenant de premiers identifiants de paquets de données perdus et le nombre des paquets de données perdus, les premiers identifiants des paquets de données perdus comprenant des numéros de séquence des paquets de données perdus, et le numéro de séquence comprenant des numéros de séquence qui peuvent être reconnus par un dispositif d'accès au réseau local sans fil (WLAN) ; en ce que le dispositif d'envoi détermine les paquets de données perdus en fonction du nombre des paquets de données perdus et des premiers identifiants des paquets de données perdus ; et en ce que le dispositif d'envoi retransmet les paquets de données perdus. De cette manière, un dispositif d'accès WLAN peut analyser un numéro de séquence d'un paquet de données reçu, de sorte qu'un numéro de séquence d'un paquet de données perdu entre un dispositif d'envoi et le dispositif d'accès WLAN puisse être déterminé ; le dispositif d'accès WLAN renvoie le numéro de séquence du paquet de données perdu au dispositif d'envoi ; et lors de la réception du numéro de séquence du paquet de données perdu, le dispositif d'envoi retransmet le paquet de données perdu, réduisant ainsi le taux de perte de paquets d'un paquet de données et améliorant la performance de transmission en réseau.
PCT/CN2015/076150 2015-04-09 2015-04-09 Procédé et appareil de transmission de données Ceased WO2016161594A1 (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792265A (zh) * 2017-01-11 2017-05-31 广州偕作信息科技有限公司 一种网络实时流媒体传输方法和系统
CN109039549A (zh) * 2018-07-13 2018-12-18 新华三技术有限公司 一种报文重传方法及装置
CN113992607A (zh) * 2021-09-09 2022-01-28 新华三信息安全技术有限公司 报文处理方法及装置
CN115913467A (zh) * 2022-12-06 2023-04-04 北京鹰瞳科技发展股份有限公司 异步重试方法、电子设备及存储介质
WO2025119025A1 (fr) * 2023-12-06 2025-06-12 中国移动通信有限公司研究院 Procédé d'envoi de données, procédé de réception de données, appareil, dispositifs associés et support de stockage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019097705A1 (fr) * 2017-11-17 2019-05-23 株式会社Ｎｔｔドコモ Dispositif et procédé de communication
CN108288996A (zh) * 2018-04-18 2018-07-17 惠州学院 基于无人机拍摄视频高保真远程传送方法、装置、存储介质及电子设备
CN109120385B (zh) * 2018-08-15 2021-08-17 锐捷网络股份有限公司 一种基于数据传输系统的数据传输方法、装置及系统
CN119788247A (zh) * 2024-12-31 2025-04-08 中国电信股份有限公司技术创新中心 基于ip层的数据传输的方法、计算机可读介质及电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2262155A2 (fr) * 2009-05-15 2010-12-15 Novatel Wireless, Inc Amélioration du flux de données TCP pour clients WLAN sur un routeur LAN sans fil
CN103001751A (zh) * 2012-12-18 2013-03-27 华中科技大学 一种lte-wlan异构无线网络系统中的跨层arq方法
CN103200622A (zh) * 2012-01-09 2013-07-10 株式会社Ntt都科摩 一种通信处理方法、装置及网关设备
WO2015048569A2 (fr) * 2013-09-26 2015-04-02 Coherent Logix, Incorporated Système et procédé de diffusion de prochaine génération

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1917639A (zh) * 2006-09-01 2007-02-21 北京天地互连信息技术有限公司 使用丢包重传的视频信号增强方法
CN101179362B (zh) * 2006-11-07 2012-07-11 中兴通讯股份有限公司 适宜移动流媒体应用的自动重传请求机制
CN103945282A (zh) * 2014-05-16 2014-07-23 成都凯智科技有限公司 文件读取方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2262155A2 (fr) * 2009-05-15 2010-12-15 Novatel Wireless, Inc Amélioration du flux de données TCP pour clients WLAN sur un routeur LAN sans fil
CN103200622A (zh) * 2012-01-09 2013-07-10 株式会社Ntt都科摩 一种通信处理方法、装置及网关设备
CN103001751A (zh) * 2012-12-18 2013-03-27 华中科技大学 一种lte-wlan异构无线网络系统中的跨层arq方法
WO2015048569A2 (fr) * 2013-09-26 2015-04-02 Coherent Logix, Incorporated Système et procédé de diffusion de prochaine génération

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792265A (zh) * 2017-01-11 2017-05-31 广州偕作信息科技有限公司 一种网络实时流媒体传输方法和系统
CN106792265B (zh) * 2017-01-11 2020-03-24 广州偕作信息科技有限公司 一种网络实时流媒体传输方法和系统
CN109039549A (zh) * 2018-07-13 2018-12-18 新华三技术有限公司 一种报文重传方法及装置
CN113992607A (zh) * 2021-09-09 2022-01-28 新华三信息安全技术有限公司 报文处理方法及装置
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
CN115913467A (zh) * 2022-12-06 2023-04-04 北京鹰瞳科技发展股份有限公司 异步重试方法、电子设备及存储介质
WO2025119025A1 (fr) * 2023-12-06 2025-06-12 中国移动通信有限公司研究院 Procédé d'envoi de données, procédé de réception de données, appareil, dispositifs associés et support de stockage

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