WO2017193305A1 - 数据传输方法、设备及系统 - Google Patents

数据传输方法、设备及系统 Download PDF

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Publication number
WO2017193305A1
WO2017193305A1 PCT/CN2016/081706 CN2016081706W WO2017193305A1 WO 2017193305 A1 WO2017193305 A1 WO 2017193305A1 CN 2016081706 W CN2016081706 W CN 2016081706W WO 2017193305 A1 WO2017193305 A1 WO 2017193305A1
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Prior art keywords
communication device
data
data packet
communications device
pdu
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PCT/CN2016/081706
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English (en)
French (fr)
Inventor
韩立锋
曾清海
黄曲芳
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680085542.0A priority Critical patent/CN109075899B/zh
Priority to EP16901260.6A priority patent/EP3447943B1/en
Priority to PCT/CN2016/081706 priority patent/WO2017193305A1/zh
Publication of WO2017193305A1 publication Critical patent/WO2017193305A1/zh
Priority to US16/185,946 priority patent/US10812229B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method, device and system.
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • WIFI Wireless-Fidelity
  • LTE Long Term Evolution
  • ARQ Automatic Repeat Request
  • HARQ Hybrid Automatic Repeat Request
  • RLC Radio Link Control Protocol
  • PDCP Packet Data Convergence Protocol
  • the basic principle is as follows: in the data transmission process, taking the data transmission between the first communication device and the second communication device as an example, when the second communication device correctly receives the data packet, it sends an affirmative response to the first communication device. (English: Acknowledgement, abbreviation: ACK) information; when the second communication device cannot correctly receive the data packet, it sends a negative acknowledgement (Negative Acknowledgment, NACK) message to the first communication device, indicating that the data packet needs to be re-requested. send.
  • NACK Negative Acknowledgment
  • the first communication device encodes the data packet, and then divides into multiple protocol data units (English: Protocol Data Unit, PDU for short) for transmission, and the PDU is a unit for data transmission.
  • the second communication device feeds back each received PDU to ensure that the second communication device receives all the PDUs and then decodes and acquires the data packets.
  • the second communication device feeds back each received PDU, and the ACK information or the NACK information occupies excessive network resources. Especially when there are many users, this retransmission mechanism will seriously affect the efficiency of system data transmission.
  • the present invention provides a data transmission method, device and system.
  • the technical solution is as follows:
  • the present invention provides a data transmission method, the method comprising:
  • the first communication device acquires the i-th data packet in the S data packets, where S is a positive integer, and the value of i is any positive integer from 1 to S;
  • the first communication device divides the i-th data packet into N i data blocks, and encodes the N i data blocks into a fountain code to generate K i fountain code code words, where N i is an integer greater than 1, and K i is greater than An integer of 1;
  • a first communications device generates a K i protocol data unit (PDU) The K i fountain code codeword, and transmits the second communication device K i th PDU;
  • PDU protocol data unit
  • the first communication device When the first communication device receives the first acknowledgment message sent by the second communication device, the first communication device stops PDU to be transmitted to the second communication device transmits a K i PDU according to the first acknowledgment information, the first sure The response message is used to indicate that the second communication device has correctly received the ith data packet.
  • K i fountain code codeword fountain m-th code with K i th codeword in the m-th PDU PDU correspond to each other, m is the interval [1, K i] is an integer.
  • the first acknowledgment information is transmitted to the second communication device after receiving a PDU, T i, T i of [1, K i] is an integer, T i K i of the second communication device PDU is received PDU Number.
  • first communication device to the second communication device transmits K i PDU is a first communication device starts performing actions K i PDU is transmitted to the second communication apparatus, it does not represent a first to a second communication device The complete process of the communication device from the start of sending K i PDUs to the K i PDU transmission completion.
  • the first communication device is a base station eNB
  • the second communication device is a user equipment UE
  • the first communication device is a UE
  • the second communication device is an eNB.
  • the i-th data packet is a radio link control RLC layer data packet; or, the i-th data packet is a packet data convergence protocol PDCP layer data packet.
  • the first communications device generates a K i fountain code codeword, K i PDU is generated, the process of sending a K i of the PDU, stepwise can also be carried out simultaneously.
  • K i fountain code code words may be generated in sequence, then K i PDUs are sequentially generated according to the generated K i fountain code code words, and then the generated K i PDUs are sequentially sent to the second communication device. send.
  • K i fountain code code words may be sequentially generated, and K i PDUs are sequentially generated.
  • the first PDU is generated according to the first fountain code code word.
  • the i-th data packet may be a large data packet formed by cascading multiple data packets.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet in the S data packets.
  • the first communication device divides the i+1th data packet in the S data packets into N i+1 data blocks, and encodes the N i+1 data blocks into the fountain code to generate K i+1 fountain code codes.
  • a word N i+1 is an integer greater than 1
  • K i+1 is an integer greater than 1
  • the first communication device generates K i+1 PDUs according to K i+1 fountain codewords, and transmits to the second communication device Send K i+1 PDUs.
  • the method further includes:
  • the first communication device adjusts the data packet indicated by the preset window to the second data packet to the S+1th data packet.
  • the method further includes:
  • K i PDU When PDU length exceeds a first predetermined duration K i PDU is the first communication device to the second communication apparatus has transmitted PDU occupied by, or a K i PDU, the first communications device has transmitted to the second communication device When the number exceeds the preset number, the first communication device discards the i th data packet;
  • the first communication device adjusts the data packet indicated by the preset window to the second data packet to the S+1th data packet.
  • the method further includes:
  • the first communication device receives the second status information that is sent by the second communication device, where the second status information is used to indicate that the second communication device correctly receives the number of PDUs of the (i+1)th data packet in the S data packets;
  • the first communication device adjusts at least one of the number of transmissions of the PDU transmitting the (i+1)th packet and the transmission rate according to the second status information.
  • the first communications device receives the second state information sent by the second communications device, including:
  • the first communications device receives the second state information sent by the second communications device.
  • the method further includes:
  • the first communication device sends the handover information to the third communication device, where the handover information is used to instruct the third communication device to send the ith data packet to the second communication device;
  • the handover information includes the sequence number of the ith data packet, and the coding code of the fountain code , at least one, comprises a fountain code encoding laws i-th data packet length encoding context, the number N i, N i-coding matrix data blocks in at least one encoding matrix is used to indicate data block a mapping relationship between the fountain code code words, the coding context is used to indicate at least one of the number of codes generated, the state of the coding matrix, and the like;
  • the first communication device sends the ith to be transmitted in the i-th data packet or the K i PDUs to the third communication device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • the method further includes:
  • the first communication device sends the stop transmission information to the fourth communication device, and the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the method further includes:
  • the first communication device receives the link state information sent by the second communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link or the data receiving situation in the preset time period;
  • the first communication device adjusts the offload policy according to the link state information.
  • the method further includes:
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the mth PDU of the K i PDUs includes at least one of the sequence number m of the mth fountain code codeword and the length of the last data block of the mth PDU, where m is 1 to Any positive integer in K i .
  • the present invention provides a data transmission method, the method comprising:
  • the second communication device receives K i protocol data unit PDUs sent by the first communication device, and K i is an integer greater than 1;
  • the second communication device acquires T i PDU is a PDU K i T i of received code codeword fountain, T i is [1, K i] within an arbitrary integer;
  • the second communication device decodes the fountain code of the T i fountain code codes
  • the second communication device When the second communication device decodes the fountain code of the T i fountain code codes to obtain the ith data packet of the S data packets, the second communication device sends the first acknowledgement information to the first communication device, the first affirmative The response information is used to indicate that the second communication device has correctly received the i-th data packet, S is a positive integer, and the value of i is any positive integer from 1 to S.
  • K i PDUs are generated by K i fountain code code words
  • K i fountain code code words are obtained by fountain code encoding by N data blocks
  • N i data blocks form an i-th data packet
  • K i The mth fountain code code word in the fountain code code word corresponds to the mth PDU in the K i PDUs
  • m is an integer in the interval [1, K i ].
  • the first acknowledgment information is transmitted to the second communication device after receiving a PDU, T i, T i of [1, K i] is an integer, T i K i of the second communication device PDU is received PDU Number.
  • the second communication device receives only a continuous operation, not all of the K i PDU is received.
  • the first communication device is a base station eNB
  • the second communication device is a user equipment UE
  • the first communication device is a UE
  • the second communication device is an eNB.
  • the i-th data packet is a radio link control RLC layer data packet; or, the i-th data packet is a packet data convergence protocol PDCP layer data packet.
  • the i-th data packet may be a large data packet formed by cascading multiple data packets.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet in the S data packets.
  • the method further includes:
  • the second communication device receives K i+1 PDUs sent by the first communication device, K i+1 PDUs are generated by K i+1 fountain code code words, and K i+1 fountain code code words are N i+1 Data blocks are generated, N i+1 data blocks constitute the i+1th data packet in S data packets, N i+1 is an integer greater than 1, and K i+1 is an integer greater than 1;
  • the second communication device acquires T i+1 fountain code code words according to the T i+1 PDUs received in the K i+1 PDUs, and T i+1 is an integer in [1, K i+1 ];
  • the second communication device decodes the fountain code of the T i+1 fountain code code words.
  • the method further includes:
  • the second communication device sends the second status information to the first communication device, where the second status information is used to indicate that the second communication device correctly receives the number of PDUs of the (i+1)th data packet in the S data packets, so that the first communication is performed.
  • the device adjusts at least one of the number of transmissions of the PDU transmitting the (i+1)th packet and the transmission rate according to the second status information.
  • the second communications device sends the second state information to the first communications device, including:
  • the second communication device When the duration occupied by the PDU that the second communication device has received exceeds the second preset duration, the second communication device sends the second status information to the first communication device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • the method further includes:
  • the second communication device sends the stop transmission information to the fourth communication device, and the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the method further includes:
  • the second communication device sends link state information to the first communication device, where the link state information is used to indicate the number of PDUs received by the second communication device on the at least one link or the data reception situation in the preset time period.
  • the method further includes:
  • the second communication device receives configuration information of the first communication device that is sent by the first communication device, where the configuration information of the first communication device includes at least one of capability information of the first communication device and a coding rule of the fountain code;
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the mth PDU of the K i PDUs includes at least one of the sequence number m of the mth fountain code codeword and the length of the last data block of the mth PDU, where m is 1 to Any positive integer in K i .
  • the present invention provides a first communications device, including:
  • An obtaining unit configured to obtain an i-th data packet in the S data packets, where S is a positive integer, and the value of i is any positive integer from 1 to S;
  • a coding unit configured to divide the i-th data packet into N i data blocks, and encode the N i data blocks into a fountain code to generate K i fountain code code words, where N i is an integer greater than 1, and K i is An integer greater than one;
  • a data processing unit configured to generate K i protocol data unit PDUs according to K i fountain code code words, and send K i PDUs to the second communication device;
  • a sending unit configured to send K i PDUs to the second communications device
  • the first communication device further includes a receiving unit,
  • the transmission unit is further configured to, when the receiving unit receives the first acknowledgment information, the acknowledgment information according to the first PDU to be sent to stop the second communication device transmits the K i PDU is first transmitted from the second communication device certainly
  • the response message is used to indicate that the second communication device has correctly received the ith data packet.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet in the S data packets.
  • the coding unit is further configured to divide the i+1th data packet in the S data packets into N i+1 data blocks, and encode the N i+1 data blocks into a fountain code to generate K i+1 fountains.
  • a codeword word N i+1 is an integer greater than 1, and K i+1 is an integer greater than one;
  • a data processing unit configured to generate K i+1 PDUs according to K i+1 fountain codewords
  • the sending unit is further configured to send K i+1 PDUs to the second communications device.
  • the data processing unit is further configured to: after the receiving unit receives the first positive response information sent by the second communication device, when the value of i is 1, the data indicated by the preset window is The packet is adjusted to the second data packet to the S+1th data packet.
  • the first communication device when the length K i PDU is the first communication device to the second communication device PDU that has been transmitted exceeds a first predetermined occupied length, or a K i PDU, the first communication device When the number of PDUs that the second communication device has transmitted exceeds a preset number,
  • the obtaining unit is further configured to discard the i-th data packet
  • the data processing unit is further configured to adjust the data packet indicated by the preset window to the second data packet to the S+1th data packet when the value of i is 1.
  • the receiving unit is further configured to receive second state information that is sent by the second communications device, where the second state information is used to instruct the second communications device to correctly receive the (i+1)th data in the S data packets.
  • the number of PDUs in the packet is further configured to receive second state information that is sent by the second communications device, where the second state information is used to instruct the second communications device to correctly receive the (i+1)th data in the S data packets. The number of PDUs in the packet;
  • the sending unit is further configured to adjust, according to the second state information, at least one of a transmission quantity and a transmission rate of the PDU that sends the (i+1)th data packet.
  • the receiving unit is further configured to receive the second state information sent by the second communications device when the duration occupied by the PDU that the second communications device has received exceeds the second preset duration.
  • the sending unit is further configured to send, to the third communications device, the switching information, where the switching information is used to instruct the third communications device to send the ith data packet to the second communications device;
  • the switching information includes the ith packet sequence number, code encoding laws fountain, at least one coding context, the coding rule fountain codes comprise i-th length of the packet, at least a number N i, N i-coding matrix in the data blocks
  • the coding matrix is used to indicate a mapping relationship between the data block and the fountain code code word
  • the coding context is used to indicate at least one of the number of codes generated, the state of the coding matrix, and the like;
  • the sending unit is further configured to send the PDU to be sent in the i th data packet or the k i PDUs to the third communications device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • the sending unit is further configured to send the stop transmission information to the fourth communication device, where the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the receiving unit is further configured to receive link state information sent by the second communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link or Data reception within a preset time period;
  • the sending unit is further configured to adjust the offload policy according to the link state information received by the receiving unit.
  • the sending unit is further configured to send configuration information of the first communications device to the second communications device, where the configuration information of the first communications device includes the capability information of the first communications device and the encoding code of the fountain code. At least one item;
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the mth PDU of the K i PDUs includes at least one of the sequence number m of the mth fountain code codeword and the length of the last data block of the mth PDU, where m is 1 to Any positive integer in K i .
  • the present invention provides a second communications device, including:
  • a receiving unit configured to receive K i protocol data unit PDUs sent by the first communications device, where K i is an integer greater than 1;
  • a data processing unit for acquiring T i fountain code codeword according PDU K i T i th PDU is received in, T i is [1, K i] within an arbitrary integer;
  • a decoding unit configured to decode the fountain code of the T i fountain codewords
  • a sending unit configured to: when the decoding unit decodes the fountain code codes of the T i fountain codes to obtain the ith data packet of the S data packets, send the first acknowledgement information to the first communications device, the first affirmative
  • the response information is used to indicate that the second communication device has correctly received the i-th data packet, S is a positive integer, and the value of i is any positive integer from 1 to S.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet in the S data packets.
  • the receiving unit is further configured to receive K i+1 PDUs sent by the first communications device, K i+1 PDUs are generated by K i+1 fountain codewords, and K i+1 fountain codewords are generated by N i +1 data block generation, N i+1 data blocks constitute the i+1th data packet in S data packets, N i+1 is an integer greater than 1, and K i+1 is an integer greater than 1;
  • the data processing unit is further configured to obtain T i+1 fountain code code words according to the T i+1 PDUs received in the K i+1 PDUs, where T i+1 is [1, K i+1 ] Integer
  • the decoding unit is further configured to perform the fountain code decoding of the T i+1 fountain code code words.
  • the sending unit is further configured to send the second status information to the first communications device, where the second status information is used to indicate that the second communications device correctly receives the i+1th data packet in the S data packets.
  • the number of PDUs so that the first communication device adjusts at least one of the number of transmissions of the PDU transmitting the (i+1)th packet and the transmission rate according to the second status information.
  • the sending unit is further configured to: when the duration of time occupied by the PDU that the second communications device has received exceeds the second preset duration, send the second state information to the first communications device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • the sending unit is further configured to send the stop transmission information to the fourth communication device, where the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the sending unit is further configured to send link state information to the first communications device, where the link state information is used to indicate that the second communications device receives the PDU on the at least one link. The number of data or the reception of data within the preset time period.
  • the receiving unit is further configured to receive configuration information of the first communications device sent by the first communications device, where the configuration information of the first communications device includes the capability information of the first communications device and the coding code of the fountain code At least one of them;
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the mth PDU of the K i PDUs includes at least one of the sequence number m of the mth fountain code codeword and the length of the last data block of the mth PDU, where m is 1 to Any positive integer in K i .
  • the present invention provides a data transmission system, including: a first communication device and a second communication device;
  • the first communication device is the first communication device described in the third aspect or any one of the possible implementation manners of the third aspect, where the second communication device is in any one possible implementation manner of the fourth aspect or the fourth aspect The second communication device described.
  • the first communication device acquires the i-th data packet in the S data packets; divides the i-th data packet into N i data blocks, and sets N i data blocks Performing fountain code encoding to generate K i fountain code code words; generating K i protocol data unit PDUs according to K i fountain code code words, and transmitting K i PDUs to the second communication device; when receiving the second communication device the first acknowledgment information, the first communication device stops the communication device transmits a second PDU K i to be transmitted in one PDU, the first acknowledgment information indicating the second communication device according to the first acknowledgment information has been received correctly The ith packet.
  • the second communication device After the second communication device correctly receives the ith data packet, it sends a feedback message to the first communication device, and does not need to feed back the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving the prior art.
  • ACK information or NACK information occupies excessive network resources, which affects the problem of system data transmission efficiency.
  • the first communication device can simultaneously transmit multiple data packets to the second communication device by using the fountain code, realize multi-process data transmission, improve data transmission efficiency of the wireless network communication system, and solve the wireless network communication system in the prior art. The problem of low data transmission efficiency.
  • FIG. 1 is a schematic structural diagram of a wireless network communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a fountain code encoding principle according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of another data transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a preset window migration effect according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of another data transmission method according to another embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a handover scenario of a communication device according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a multi-link scenario according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a first communications device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a second communication device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another first communication device according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another second communication device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention.
  • the data transmission method and device provided by the embodiments of the present invention can be applied to a wireless network communication system, such as a Universal Mobile Telecommunications System (UMTS), code division multiple access (English: Code Division Multiple Access, Abbreviation: CDMA) system, global mobile communication system (English: Global System for Mobile Communications, Abbreviation: GSM), Wireless Fidelity (WIFI) system and Long Term Evolution (LTE) system.
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • WIFI Wireless Fidelity
  • LTE Long Term Evolution
  • the LTE system is taken as an example to provide a wireless network communication system.
  • the wireless network communication system 10 includes: a first evolved Node B (English: Evolved Node B, eNB for short) 101.
  • the data transmission method provided by the present invention can be applied to data transmission between each communication device in the wireless network communication system 10, for example, between an MME and an eNB, between an eNB and a UE, and between eNBs.
  • the MME may also be a serving gateway (English: Serving GateWay, S-GW for short).
  • the wireless network communication system 10 may also include other communication devices.
  • the network device is described.
  • the data transmission method provided by the embodiment of the present invention is also applicable to other communication systems.
  • the data transmission method provided by the embodiment of the present invention can be used for the core.
  • Network English: Core Net, referred to as CN
  • Radio Network Controller English: Radio Network Controller, RNC for short
  • data transmission between UEs
  • second generation mobile communication English: 2Generation, referred to as 2G
  • the data transmission method provided by the embodiment of the present invention can be used for data transmission between a CN, a base transceiver station (Broad Transceiver Station, BTS for short), and a UE.
  • BTS Broad Transceiver Station
  • the embodiment of the present invention provides The data transmission method can be used for data transmission between an access point (English: Access Point, abbreviated as: AP) and a station (Station).
  • AP Access Point
  • Station station
  • An embodiment of the present invention provides a data transmission method, where the data transmission method is applied to a first communication device, where the first communication device is a transmission side device in data transmission.
  • the first communication device may be any one of an MME, an eNB, or a UE.
  • the data transmission method provided in this embodiment includes the following steps:
  • the first communications device acquires an ith data packet in the S data packets.
  • the ith data packet may include one or more data packets, one or more data packets, one or more data frames, and one or more data segments, where the data packet is in different transmission scenarios. The form is different, and the present invention does not limit this.
  • the i-th data packet may be a large data packet formed by cascading multiple data packets.
  • the data transmission method provided in this embodiment may be applied to a radio link control (English: Radio Link Control Protocol, RLC) layer or a Packet Data Convergence Protocol (PDCP) layer. data transmission.
  • RLC Radio Link Control Protocol
  • PDCP Packet Data Convergence Protocol
  • the first communications device divides the i-th data packet into N i data blocks, and encodes the N i data blocks into a fountain code to generate K i fountain code code words.
  • N i is an integer greater than 1
  • K i is an integer greater than 1.
  • the principle of the fountain code is as shown in FIG. 3.
  • the i-th data packet is divided into N i data blocks, and in the N i data blocks, Arbitrarily selecting a plurality of data blocks in the N i data blocks to generate a fountain code code word, so that the code is continuously encoded, and a continuous code word is generated for transmission, and the second communication device (in this embodiment After receiving the codeword, the second communication device performs decoding to obtain the original data block.
  • the N i data blocks can be completely acquired to obtain the original data packet (in this embodiment, i packets). Because the encoding is performed by arbitrarily selecting multiple encodings in the N i data blocks, even if several codewords are lost during the transmission, since the new codewords can continue to be received subsequently, the overall In the decoding process, this transmission mode has a high fault tolerance.
  • N i 10 as an example.
  • the process of coding and decoding the fountain is as follows:
  • the first communication device receives a data packet and divides it into 10 equal-sized blocks, each of which is numbered 1, 2, ... 10; and performs fountain code encoding on 10 data blocks, for example, for the first and second data.
  • the block is XORed to obtain the fountain code code word 1; the third, fifth and tenth data blocks are XORed to obtain the fountain code code word 2.
  • the information for selecting multiple data blocks for exclusive OR operation is called an encoding matrix, and can be represented by a random sequence.
  • the inverse operation of the coding matrix of the fountain code code word can restore the data block.
  • the data block 1 and the fountain code code word 1 can be XORed to decode, and the data block 2 can be obtained.
  • the decoding operation can be performed. Get all 10 data blocks.
  • the first communications device generates a protocol data unit number K i K i
  • the fountain code codeword (English: Protocol Data Unit, abbreviated: PDU).
  • K i fountain code codeword fountain m-th code with K i th codeword in the m-th PDU PDU correspond to each other, m is the interval [1, K i] is an integer.
  • the data format of the PDU is different according to different transmission scenarios.
  • the PDU of the physical layer is a data bit
  • the PDU of the data link layer is a data frame
  • the PDU of the network layer is a data packet. (packet)
  • the PDU of the transport layer is the data segment (segment)
  • other higher-level PDUs It is a message (message) and so on.
  • the way to generate PDUs is different.
  • the PDCP layer the need for a fountain code K i code words PDCP layer are encrypted, integrity protection, plus top process, optionally, a K i of the m-th PDU PDU contains the m-th fountain amble At least one of the sequence number m of the word and the length of the last data block of the mth PDU.
  • the sequence number m of the mth fountain code code word and the last data block of the mth PDU may be The length is placed in the head of the mth PDU; in addition, optionally, the coding rule of the fountain code may be carried in the head of the mth PDU, and the coding code of the fountain code may include the encoded data length (this embodiment) The length of the i-th data packet, the number of divided blocks (the number of N i data blocks in this embodiment), and at least one of the coding matrix, wherein the coding matrix refers to the source code to the target
  • the mapping relationship of the codewords is, in this embodiment, the mapping relationship between the data blocks and the fountain codewords.
  • the first communications device sends K i PDUs to the second communications device.
  • the first communication device in generating the K i fountain code codeword, K i generates a PDU
  • the PDU is transmitted in K i
  • stepwise K may be generated sequentially fountain code codeword, and sequentially generates K I
  • K good PDU is generated according to a fountain code codeword I
  • K I then generate good PDU is sequentially transmitted to the second communication device .
  • K i fountain code code words may be sequentially generated, and K i PDUs are sequentially generated. After the first fountain code code word has been generated, the first PDU is generated according to the first fountain code code word.
  • the first communications device may further receive link state information sent by the second communications device, where the link state information is used to indicate the second The number of PDUs received by the communication device on the at least one link or the data reception status in the preset time period, and the first communication device may adjust the offload policy according to the link state information.
  • the first acknowledgement information is sent by the second communications device after receiving the T i PDUs, and is used to indicate that the second communications device has correctly received the i th data packet, where T i is [1, K i ] The integer, T i is the number of PDUs received by the second communication device in the K i PDUs.
  • the bonding step 204 only said first communication device to the second communication device transmits K i PDU is a first communication device to begin operation of the second communication device transmits a K i of the PDU, the first communications device do not represent the The complete process of the second communication device from the start of sending K i PDUs to the K i PDU transmission completion.
  • step 205 is a case where the second communication device correctly receives the i-th data packet.
  • an abnormal situation may occur, and at this time, the transmission of the i-th data packet is also stopped. For example, when the length of time occupied by the first communication device of the K i PDUs to the second communication device exceeds the first preset duration, or the K i PDUs, the first communication device has sent to the second communication device.
  • the first communication device stops sending K i th PDU in the PDU to be transmitted to the second communication device; in one application scenario, if the first communication device receives the second communication device transmitting the NACK information may continue to transmit PDU, duration until the K i PDU is the first communication device to the second communication apparatus has transmitted PDU occupied by more than a first predetermined length, or a K i PDU, the first communication device If the number of PDUs that have been transmitted to the second communication device exceeds a preset number, the transmission is terminated.
  • the second communication device when the second communication device receives a plurality of PDUs, it can decode to obtain the complete i-th data packet, and at this time, stop transmitting the K- th PDU to the second communication device.
  • the number of PDUs to be sent by the second communication device is not fixed because the coding of the fountain code is randomly selected in the N i data blocks for encoding. In this way, the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to generate the ith data packet to generate multiple PDUs as in the prior art. Feedback on the reception of each PDU greatly reduces feedback information and saves network resources.
  • the first communications device may send configuration information of the first communications device to the second communications device, where the configuration information of the first communications device includes at least one of capability information of the first communications device and a coding rule of the fountain code. item.
  • the first communication device may send the configuration information of the first communication device to the second communication device by means of a broadcast.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the first communication device acquires the i-th data packet in the S data packets, divides the i-th data packet into N i data blocks, and performs N i data blocks into the fountain code. Encoding generates K i fountain code code words; generates K i protocol data unit PDUs according to K i fountain code code words, and transmits K i PDUs to the second communication device, when receiving the first transmission by the second communication device When the acknowledgement information is affirmative, the PDU to be transmitted in the K i PDUs is stopped from being transmitted to the second communication device according to the first acknowledgement information.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the embodiment of the present invention provides another data transmission method, which is applied to the first side communication device of the data transmission method in the embodiment corresponding to FIG.
  • the data transmission method provided in this embodiment can implement multi-process data transmission when the data transmission method described in the embodiment corresponding to FIG. 1 is executed.
  • the transmission of the data packet is taken as an example for description.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet to the S data in the S data packets. package.
  • the length of the preset window can be adjusted by itself.
  • the length of the preset window is taken as an example of the length of the S packets.
  • each data packet in the S data packets may be a fixed length data packet obtained by cascading a plurality of data units, and the same fountain code encoding rule may be used. Referring to FIG. 4, after the first communication device divides the i data packets into Ni data blocks, the data transmission method provided in this embodiment includes the following steps:
  • the first communications device divides the i+1th data packet in the S data packets into N i+1 data blocks, and encodes the N i+1 data blocks into a fountain code to generate K i+1 fountains. Code code word.
  • step 401 is performed after the first communication device divides the i+1th data packet in the S data packets into N i+1 data blocks, where N i+1 is an integer greater than 1.
  • K i+1 is an integer greater than one.
  • the first communications device generates N i+1 PDUs according to the N i+1 fountain codewords.
  • the first communications device sends N1 +1 PDUs to the second communications device.
  • the first communications device sequentially performs operations of steps 401-403 on each of the S data packets, and the processing procedure of each data packet is independent of each other. After the previous packet is divided into multiple data blocks, the next data packet can be placed. This allows multiple packets to be transmitted simultaneously in the length of the preset window.
  • the first communications device adjusts the data packet indicated by the preset window to the second Packets to the S+1th packet.
  • the first communication device discards the i-th data packet; when the value of i is 1, the first communication device adjusts the data packet indicated by the preset window to the first 2 packets to the S+1th packet.
  • the preset window indicates that the data packet sent by the first communication device is the first data packet to the Sth data packet of the S data packets.
  • the transmission of the first data packet is stopped, and the preset window is moved to the right to become the second data packet.
  • each data packet can have a serial number to determine the range of the preset window.
  • the data transmission method provided in this embodiment may further include: the first communication device receives the second state information sent by the second communication device, where the second state information is used to indicate that the second communication device correctly receives the S packets.
  • the first communications device receives the second state information sent by the second communications device.
  • the second state information may be carried in the acknowledgement information or the negative acknowledgement information to the first communication device.
  • the description herein is merely illustrative and does not represent that the present invention is limited thereto.
  • the feedback information may include state information of at least one other data packet to indicate the reception of other data packets, so that The first communication device can adjust at least one of the number of transmissions of the PDUs transmitting the respective data packets and the transmission rate according to the status information of the respective data packets.
  • the number of transmissions and the transmission rate of each data packet can be separately adjusted, the transmission redundancy of each data packet PDU is reduced, the transmission resources can be fully utilized, and the transmission efficiency of the network communication system is improved.
  • the first communication device divides the i+1th data packet in the S data packets into N i+1 data blocks, and performs the fountain code encoding on the N i+1 data blocks.
  • the first communication device can simultaneously transmit multiple data packets to the second communication device by using the fountain code, realize multi-process data transmission, improve data transmission efficiency of the wireless network communication system, and solve the data of the wireless network communication system in the prior art. The problem of low transmission efficiency.
  • another embodiment of the present invention provides a data transmission method, and a method for receiving a data transmission method corresponding to the embodiment corresponding to FIG. 2 is applied to a second communication device, preferably
  • the second communication device may be any one of an MME, an eNB, or a UE.
  • the data transmission method provided in this embodiment includes the following steps:
  • the second communications device receives the K i protocol data unit PDUs sent by the first communications device.
  • K i is an integer greater than 1
  • K i PDU is generated by the K i fountain code codeword
  • K i fountain code codeword m-th fountain code codeword and K i PDU is the m-th PDU to each other correspondence
  • m is the interval [1, K i] integers
  • the mth PDU includes at least one of a sequence number m of the mth fountain code codeword and a length of a last data block of the mth PDU.
  • the second communication device receives only a continuous operation, not all of the K i PDU is received, the embodiment described in conjunction with FIG. 2 corresponding to the second communication device sequentially receives PDU, when the second After the PDU received by the communication device is decoded to obtain the i-th data packet, the PDU generated by the i-th data packet can be stopped.
  • the second communication apparatus T i acquires fountain code codeword according PDU K i T i th PDU is received in.
  • T i is an integer within [1, K i ].
  • the PDU generation method is different in different transmission scenarios.
  • the PDCP layer, the need for a fountain code K i code words PDCP layer are encrypted, integrity protection, plus class processing, and therefore, correspondingly, the second communication apparatus after receiving the PDUs, to be the first to complete sexual verification, decryption, etc.
  • the mth PDU includes at least one of a sequence number m of the mth fountain code codeword and a length of a last data block of the mth PDU.
  • the mth fountain codeword word may be used.
  • the sequence number m and the length of the last data block in the mth PDU are placed at the head of the mth PDU; in addition, optionally, the code of the fountain code may be carried in the head of the mth PDU, the fountain
  • the coding algorithm of the code may include the encoded data length (the length of the i-th data packet in this embodiment), the number of divided blocks (the number of N i data blocks in this embodiment), and at least the coding matrix.
  • the coding matrix refers to a mapping relationship from a source code word to a target code word. In this embodiment, the mapping relationship between the data block and the fountain code code word is used.
  • the second communications device may further send link state information to the first communications device, where the link state information is used to indicate the second communications The number of PDUs received by the device on the at least one link or the data reception status in the preset time period, so that the first communication device adjusts the offload policy according to the link state information.
  • the second communications device decodes the fountain code of the T i fountain codewords.
  • the second communications device When the second communications device performs the fountain code decoding of the T i fountain codewords to obtain the i-th data packet, the second communications device sends the first acknowledgement information to the first communications device.
  • the first positive response message is used to indicate that the second communication device has correctly received the ith data packet.
  • step 604 is a case where the second communication device correctly receives the i-th data packet.
  • the second communication device may transmit NACK information to the first communication device when the data packet is transmitted.
  • the second communications device may further receive configuration information of the first communications device sent by the first communications device, where the configuration information of the first communications device includes the capability information of the first communications device and the coding rule of the fountain code. At least one.
  • the first communication device may send the configuration information of the first communication device to the second communication device by means of a broadcast.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the second communication device receives the K i protocol data unit PDUs sent by the first communication device, and acquires T i fountain code code words according to the T i PDUs received in the K i PDUs.
  • the fountain codes T i fountain code decoding code words when the second communication apparatus T will be the i-th code decoding fountain fountain code codeword obtained data packet in S i-th data packet transmitted to the first communication device The first positive response message.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • another embodiment of the present invention provides another data transmission method, which is applied to the data transmission method receiving side body-second communication device in the embodiment corresponding to FIG. .
  • the data transmission method provided in this embodiment can implement multi-process data transmission when performing the data transmission method described in the embodiment corresponding to FIG. 6.
  • the transmission of the data packet is taken as an example for description.
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet to the S data packet of the S data packets.
  • the length of the preset window can be adjusted by itself.
  • the length of the preset window is taken as an example of the length of the S packets.
  • the second communications device receives K1 +1 PDUs sent by the first communications device.
  • K i+1 PDUs are generated by K i+1 fountain code code words
  • K i+1 fountain code code words are generated by N i+1 data blocks
  • N i+1 data blocks are composed of S data packets.
  • N i+1 is an integer greater than 1
  • K i+1 is an integer greater than 1.
  • the K i + 1 PDU is received in the PDU is T i + 1 T i + 1 acquires fountain code codeword.
  • T i+1 is an integer within [1, K i+1 ].
  • the second communications device decodes the fountain code of the T i+1 fountain codewords.
  • the second communication device sequentially performs operations of steps 701-703 on each of the S data packets, and the processing process of each data packet is independent of each other.
  • the PDU generated by the S data packets is received, and the received PDU is decoded by the fountain code, so that multiple data packets can be received simultaneously in the length of the preset window.
  • the second communications device may further send second state information to the first communications device, where the second state information is used to indicate that the second communications device correctly receives the PDU of the (i+1)th packet in the S data packets.
  • the number is such that the first communication device adjusts at least one of the number of transmissions of the PDU transmitting the (i+1)th packet and the transmission rate according to the second status information.
  • the second communications device sends the first communications to the first communications.
  • the device sends the second status information.
  • the second communication device receives the K i+1 PDUs sent by the first communication device, and acquires T i+1 according to the T i+1 PDUs received in the K i+1 PDUs.
  • the fountain code code word decodes the fountain code of the T i+1 fountain code code word.
  • the data transmission method provided by the present invention is described in the embodiment of the present invention.
  • the first embodiment of the present invention may be combined with the embodiment corresponding to FIG. 4 and FIG.
  • the communication device transmits data to the second communication device, and switches to the third communication device to transmit data to the second communication device.
  • the first communication device may be the first eNB 101.
  • the third communication device may be the second eNB 102.
  • the second communication device is the first MME 107.
  • the second communication device is the first UE 104.
  • FIG. 8 illustrates an example in which downlink data transmission is performed by an eNB and a UE.
  • the communication device handover scenario shown in FIG. 8 includes a source eNB 801, a target eNB 802, a UE 803, and an S-GW 804.
  • the first communication device is the source eNB 801
  • the second communication device is the UE 803
  • the third communication device is the target eNB 802.
  • the first communications device sends the switching information to the third communications device, where the switching information is used to instruct the third communications device to send the ith data packet to the second communications device;
  • the switching information includes the sequence number of the ith data packet, encoding rule fountain codes, at least one coding context, the coding rule fountain codes comprise i-th length of the packet, the at least one encoding matrix with the number N i, N i-coding matrix in the data blocks
  • the mapping context is used to indicate at least one of the number of codes generated, the state of the coding matrix, and the like, in a mapping relationship between the data block and the fountain codeword.
  • the first communication device sends the ith to be transmitted in the i-th data packet or the K i PDUs to the third communication device.
  • the first communication device may only send the i-th data packet to the third device, and the third communication device may divide the i-th data packet into N i data blocks according to the handover information.
  • the first communication device may only transmit in K i th PDU PDU to be transmitted to a third device, in conjunction with the principles of fountain codes, by the first communication device Generating a PDU, transmitting the PDU to a third communication device, and transmitting the PDU to the second communication device; or the first communication device may send the ith data packet together with the PDU to be sent in the K i PDUs To the third communication device.
  • the description herein is merely illustrative and does not mean that the invention is limited thereto.
  • the first communication device sends the PDU that has been sent but has not received the confirmation by the second communication device to the third communication device; the first communication device transmits the new data sent by the S-GW 804 to the third communication device. .
  • the embodiment corresponding to FIG. 4 and FIG. 7 may be combined.
  • the embodiment of the present invention describes the data transmission method provided by the present invention in a multi-link scenario.
  • the first communication device directly transmits data to the second communication device; in the second link, the first communication device forwards the data through the fourth communication device, and transmits data to the second communication device, preferably, refer to FIG.
  • the first communication device may be the first eNB 101
  • the third communication device may be the second eNB 102.
  • the second communication device is the first MME 107, and the downlink data is transmitted.
  • the second communication device is the first UE 104.
  • the description herein is merely illustrative and does not mean that the invention is limited thereto.
  • FIG. 9 illustrates an example in which downlink data transmission is performed by an eNB and a UE.
  • the multi-link scenario shown in FIG. 9 includes a macro eNB 901, a micro eNB 902, a UE 903, and an S-GW 904.
  • the first communication device is the macro eNB 901
  • the second communication device is the UE 903
  • the third communication device is the micro eNB 902.
  • the macro eNB 901 receives the i th data packet from the S data packets of the S-GW 904. After the fountain code encoding process, the generated PDU is transmitted to the micro eNB 902 and the UE 903, and the micro eNB 902 transmits the PDU transmitted by the macro eNB 901. Then forward to UE 903.
  • the second communication device (the second communication device, the UE 903) does not need to sort the PDUs received on multiple links, and only needs to perform combined decoding, thereby improving the efficiency of data receiving and decoding. And make full use of the resources of the network communication system, improve the efficiency of the network communication system to transmit data.
  • the first communication device After the first communication device (eNB 901) receives the first acknowledgement information sent by the second communication device (UE 903), the first communication device sends the stop transmission information to the fourth communication device (micro eNB 902), and stops transmitting the information for indication.
  • the fourth communication device discards the PDUs already stored in the K i PDUs. Alternatively, the stop transmission information is transmitted by the second communication device to the fourth communication device.
  • the second communications device may further send link state information to the first communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link or within a preset time period.
  • the first communication device adjusts the offload policy according to the link state information sent by the second communication device. Specifically, if the link status information indicates that the link status forwarded to the second communication device by the fourth communication device is good, the first communication device may transmit more PDUs to the fourth communication device, thereby reducing direct transmission.
  • the number of PDUs to the second communication device is, of course, merely illustrative and does not represent that the invention is limited thereto.
  • the embodiment of the present invention provides a first communication device for performing the data transmission method described in the foregoing embodiment corresponding to FIG. 2, in conjunction with the embodiment corresponding to FIG. 2 above.
  • the first communications device provided in this embodiment may also perform the data transmission method described in the embodiments corresponding to FIG. 4, FIG. 8, and FIG.
  • the first communication device provided in this embodiment is applied to data transmission of the RLC layer or the PDCP layer.
  • the first communication device 100 includes: an obtaining unit 1001, an encoding unit 1002, a data processing unit 1003, a transmitting unit 1004, and a receiving unit 1005.
  • the obtaining unit 1001 is configured to obtain an i-th data packet in the S data packets, where S is a positive integer, and the value of i is any positive integer from 1 to S.
  • the coding unit 1002 is configured to divide the i-th data packet into N i data blocks, and encode the N i data blocks into a fountain code to generate K i fountain code code words, where N i is an integer greater than 1, and K i Is an integer greater than 1.
  • the K i fountain code codeword, and the second communication device transmits K i th PDU.
  • the sending unit 1004 is configured to send K i PDUs to the second communications device.
  • the first communication device 100 further includes a receiving unit 1005,
  • a transmitting unit 1004, receiving unit 1005 is also configured to, when receiving a first acknowledgment message to the second communication device stops transmitting PDU K i PDU is to be transmitted in accordance with the first acknowledgment information transmitted from the second communication device, the first An affirmative response message is used to indicate that the second communication device has correctly received the i th data packet, and the first acknowledgement message may be sent by the second communications device after receiving the T i PDUs, where T i is [1, K i integer] in, T i K i for the received PDU is a second communication device PDU number.
  • a K i of the m-th PDU PDU contains a sequence number m of the m-th code codeword fountain, at least one of a length of the last data block in the m-th PDU, m is 1 to K i Any positive integer in .
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet to the S data packet of the S data packets.
  • the coding unit 1002 is further configured to divide the i+1th data packet in the S data packets into N i+1 data blocks, and encode the N i+1 data blocks into the fountain code to generate K i+1 data blocks.
  • Fountain code code word, N i+1 is an integer greater than 1
  • K i+1 is an integer greater than 1.
  • the data processing unit 1003 is further configured to generate K i+1 PDUs according to the K i+1 fountain code codewords.
  • the sending unit 1004 is further configured to send K i+1 PDUs to the second communications device.
  • the data processing unit 1003 is further configured to: after the receiving unit 1005 receives the feedback information sent by the second communication device, when the value of i is 1, adjust the data packet indicated by the preset window to be the first 2 packets to the S+1th packet.
  • the obtaining unit 1001 is further configured to discard the i th data packet.
  • the data processing unit 1003 is further configured to adjust the data packet indicated by the preset window to the second data packet to the S+1th data packet when the value of i is 1.
  • the receiving unit 1005 is further configured to receive second state information that is sent by the second communications device, where the second state information is used to indicate that the second communications device correctly receives the i+1th data packet of the S data packets.
  • the number of PDUs is further configured to receive second state information that is sent by the second communications device, where the second state information is used to indicate that the second communications device correctly receives the i+1th data packet of the S data packets. The number of PDUs.
  • the sending unit 1004 is further configured to adjust, according to the second state information, at least one of a transmission quantity and a transmission rate of the PDU that sends the (i+1)th data packet.
  • the receiving unit 1005 is further configured to receive the second state information sent by the second communications device when the duration occupied by the PDU that the second communications device has received exceeds the second preset duration.
  • the sending unit 1004 is further configured to send, to the third communications device, the switching information, where the switching information is used to instruct the third communications device to send the ith data packet to the second communications device; the switching information includes the sequence number of the ith data packet, and the fountain code coding rule, at least one coding context, the coding rule fountain codes comprise i-th length of the packet, the at least one encoding matrix for indicating the number N i, N i-coding matrix in the data blocks A mapping relationship between the data block and the fountain code code word, the coding context is used to indicate at least one of the number of codes generated, the state of the coding matrix, and the like.
  • the sending unit 1004 is further configured to send, to the third communications device, the PDU to be sent in the i th data packet or the k i PDUs.
  • the first communication device and the second communication device forward the data transmission through the fourth communication device.
  • the sending unit 1004 is further configured to send the stop transmission information to the fourth communication device, where the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the receiving unit 1005 is further configured to receive link state information sent by the second communications device, where the link state information is used to indicate the number of preset PDUs or preset times of the second communications device on the at least one link. Data reception within the segment.
  • the sending unit 1004 is further configured to adjust the offload policy according to the link state information received by the receiving unit 1005.
  • the sending unit 1004 is further configured to send configuration information of the first communications device to the second communications device, where the configuration information of the first communications device includes at least one of capability information of the first communications device and a coding rule of the fountain code. item.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the first communication device acquires the i-th data packet in the S data packets, divides the i-th data packet into N i data blocks, and encodes the N i data blocks into a fountain code to generate K. i fountain code code words; generate K i protocol data unit PDUs according to K i fountain code code words, and send K i PDUs to the second communication device, when receiving the first positive response message sent by the second communication device And stopping, according to the first acknowledgement information, transmitting, to the second communication device, the PDU to be sent in the K i PDUs.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the embodiment of the present invention provides a second communication device, which is used to perform the data transmission method described in the foregoing embodiment corresponding to FIG. 6.
  • the second communication device provided in this embodiment may also perform the data transmission method described in the embodiments corresponding to FIG. 7, FIG. 8, and FIG.
  • the second communication device provided in this embodiment is applied to data transmission of the RLC layer or the PDCP layer.
  • the second communication device 110 provided in this embodiment includes: a receiving unit 1101, a data processing unit 1102, a decoding unit 1103, and a sending unit 1104.
  • the receiving unit 1101 is configured to receive K i protocol data unit PDUs sent by the first communications device, where K i is an integer greater than 1, and K i PDUs are generated by K i fountain codewords, where K i
  • K i The mth fountain code code word in the fountain code code word corresponds to the mth PDU in the K i PDUs, m is an integer in the interval [1, K i ], and K i fountain code code words are N i data
  • the block is encoded by the fountain code, and the N i data blocks constitute the i-th data packet, and N i is an integer greater than 1.
  • the data processing unit 1102 is configured to obtain T i fountain code code words according to the T i PDUs received in the K i PDUs, where T i is any integer within [1, K i ].
  • the decoding unit 1103 is configured to perform the fountain code decoding on the T i fountain code code words.
  • the sending unit 1104 is configured to: when the decoding unit 1103 performs the fountain code decoding of the T i fountain code code words to obtain the i th data packet in the S data packets, send the first acknowledgement information to the first communications device, where An affirmative response message is used to indicate that the second communication device has correctly received the i-th data packet, S is a positive integer, and the value of i is any positive integer from 1 to S.
  • a K i of the m-th PDU PDU contains a sequence number m of the m-th code codeword fountain, at least one of a length of the last data block in the m-th PDU, m is 1 to K i Any positive integer in .
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet to the Sth data of the S data packets. data pack.
  • the receiving unit 1101 is further configured to receive K i+1 PDUs sent by the first communications device, and the K i+1 PDUs are generated by K i+1 fountain codewords, and the K i+1 fountain codewords are N. i+1 data blocks are generated, N i+1 data blocks constitute the i+1th data packet in S data packets, N i+1 is an integer greater than 1, and K i+1 is an integer greater than 1;
  • the data processing unit 1102 is further configured to obtain T i+1 fountain code code words according to the T i+1 PDUs received in the K i+1 PDUs, where T i+1 is [1, K i+1 ] Integer
  • the decoding unit 1103 is further configured to perform the fountain code decoding on the T i+1 fountain code code words acquired by the data processing unit 1102.
  • the sending unit 1104 is further configured to send the second status information to the first communications device, where the second status information is used to indicate that the second communications device correctly receives the PDU of the (i+1)th data packet in the S data packets.
  • the number is such that the first communication device adjusts at least one of the number of transmissions of the PDU transmitting the (i+1)th packet and the transmission rate according to the second status information.
  • the sending unit 1104 is further configured to: when the duration occupied by the PDU that the second communication device has received exceeds the second preset duration, send the second state information to the first communications device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • the sending unit 1104 is further configured to send the stop transmission information to the fourth communication device, where the stop transmission information is used to instruct the fourth communication device to discard the PDUs already stored in the K i PDUs.
  • the sending unit 1104 is further configured to send link state information to the first communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link, or a preset time period.
  • the receiving unit 1101 is further configured to receive configuration information of the first communications device sent by the first communications device, where the configuration information of the first communications device includes at least the capability information of the first communications device and the encoding code of the fountain code.
  • the configuration information of the first communications device includes at least the capability information of the first communications device and the encoding code of the fountain code.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the second communication device receives the K i protocol data unit PDUs sent by the first communication device, and acquires T i fountain code code words according to the T i PDUs received in the K i PDUs, and the T i
  • the fountain code code word is used to decode the fountain code.
  • the second communication device decodes the fountain code code of the T i fountain code codes to obtain the i-th data packet in the S data packets, the first affirmation is sent to the first communication device. Answer the message.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the embodiment of the present invention provides another first communication device for performing the data transmission method described in the foregoing embodiment corresponding to FIG. 2.
  • the first communications device provided in this embodiment may also perform the data transmission method described in the embodiments corresponding to FIG. 4, FIG. 8, and FIG.
  • the first communication device provided in this embodiment is applied to data transmission of the RLC layer or the PDCP layer.
  • the first communication device 120 includes: a processor 1201, a memory 1202, a transmitter 1203, a receiver 1204, and a bus 1205.
  • the bus 1205 is configured to connect to the processor 1201, the memory 1202, and the transmitter. 1203 and a receiver 1204, the processor 1201 is configured to execute a program stored in the memory 1202.
  • the transmitter 1203 and the receiver 1204 may be controlled by separate programs.
  • the transmitter 1203 and the receiver 1204 may have separate chips, or the transmitter 1203 and the receiver 1204 simply perform transmission.
  • processing of receiving data, further processing is completed by the processor 1201 calling the program, and the invention is not limited thereto.
  • the processor 1201 is configured to obtain an i-th data packet in the S data packets, where S is a positive integer, and the value of i is any positive integer from 1 to S; the i-th data packet is divided into N i Data blocks, and N i data blocks are coded by fountain code to generate K i fountain code code words, N i is an integer greater than 1, and K i is an integer greater than 1; K is generated according to K i fountain code code words i protocol data unit PDU.
  • the transmitter 1203 is configured to send K i PDUs to the second communications device.
  • Transmitter 1203, receiver 1204 is also configured to, when receiving the first acknowledgment information transmitted from the second communication device is stopped when the second PDU to be transmitted to the communications device transmits K i th PDU according to the first acknowledgment information, the first An affirmative response message is used to indicate that the second communication device has correctly received the i th data packet, and the first acknowledgement message may be sent by the second communications device after receiving the T i PDUs, where T i is [1, K i integer] in, T i K is the number of PDU in the PDU is received by the second communication device.
  • a K i of the m-th PDU PDU contains a sequence number m of the m-th code codeword fountain, at least one of a length of the last data block in the m-th PDU, m is 1 to K i Any positive integer in .
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate the
  • the data packet sent by a communication device is the first data packet to the S data packet of the S data packets.
  • the processor 1201 is further configured to divide the i+1th data packet in the S data packets into N i+1 data blocks, and encode the N i+1 data blocks into a fountain code to generate K i+1 data blocks.
  • Fountain codeword, N i+1 is an integer greater than 1, and K i+1 is an integer greater than 1; the first communication device generates K i+1 PDUs according to K i+1 fountain codewords.
  • the transmitter 1203 is further configured to send K i+1 PDUs to the second communications device.
  • the processor 1201 is further configured to: after the receiver 1204 receives the feedback information sent by the second communication device, when the value of i is 1, adjust the data packet indicated by the preset window to be the second Packets to the S+1th packet.
  • the processor 1201 is further configured to discard the i-th data packet when the number of PDUs that have been sent exceeds a preset number.
  • the value of i is 1, the data packet indicated by the preset window is adjusted to the second data packet to the S+1th data packet.
  • the receiver 1204 is further configured to receive second state information that is sent by the second communications device, where the second state information is used to indicate that the second communications device correctly receives the i+1th data packet of the S data packets.
  • the number of PDUs is further configured to receive second state information that is sent by the second communications device, where the second state information is used to indicate that the second communications device correctly receives the i+1th data packet of the S data packets. The number of PDUs.
  • the receiver 1204 is further configured to receive the second state information sent by the second communications device when the duration occupied by the PDU that the second communications device has received exceeds the second preset duration.
  • the transmitter 1203 is further configured to adjust, according to the second state information received by the receiver 1204, at least one of a transmission quantity and a transmission rate of the PDU that sends the (i+1)th data packet.
  • the transmitter 1203 is further configured to send, to the third communications device, the switching information, where the switching information is used to instruct the third communications device to send the ith data packet to the second communications device; the switching information includes the sequence number of the ith data packet, and the fountain code coding rule, at least one coding context, the coding rule fountain codes comprise i-th length of the packet, the at least one encoding matrix for indicating the number N i, N i-coding matrix in the data blocks A mapping relationship between the data block and the fountain code code word, the coding context is used to indicate at least one of the number of codes generated, the state of the coding matrix, and the like.
  • the transmitter 1203 is further configured to send, to the third communications device, the PDU to be sent in the i th data packet or the k i PDUs.
  • the first communication device and the second communication device forward the data transmission through the fourth communication device.
  • Transmitter 1203 is also configured to send a fourth communication device stops transmitting information to stop transmission of information indicating the fourth communication device discards K PDU i PDU is already stored.
  • the receiver 1204 is further configured to receive link state information sent by the second communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link, or a preset time. Data reception within the segment.
  • the transmitter 1203 is further configured to adjust the offload policy according to the link state information received by the receiver 1204.
  • the transmitter 1203 is further configured to send configuration information of the first communications device to the second communications device, where the configuration information of the first communications device includes at least one of capability information of the first communications device and a coding rule of the fountain code. item.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the first communication device acquires the i-th data packet in the S data packets, divides the i-th data packet into N i data blocks, and encodes the N i data blocks into a fountain code to generate K. i fountain code code words; generate K i protocol data unit PDUs according to K i fountain code code words, and send K i PDUs to the second communication device, when receiving the first positive response message sent by the second communication device And stopping, according to the first acknowledgement information, transmitting, to the second communication device, the PDU to be sent in the K i PDUs.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the embodiment of the present invention provides another second communication device for performing the data transmission method described in the foregoing embodiment corresponding to FIG. 6.
  • the second communication device provided in this embodiment may also perform the data transmission method described in the embodiments corresponding to FIG. 7, FIG. 8, and FIG.
  • the second communication device provided in this embodiment is applied to data transmission of the RLC layer or the PDCP layer.
  • the second communication device 130 includes: a processor 1301, a memory 1302, a transmitter 1303, a receiver 1304, and a bus 1305; a bus 1305 is used to connect the processor 1301, the memory 1302, the transmitter 1303, and the receiver 1304, and the processor 1301 is configured to execute a program stored in the memory 1302.
  • the transmitter 1303 and the receiver 1304 may be controlled by separate programs.
  • the transmitter 1303 and the receiver 1304 may have separate chips, or the transmitter 1303 and the receiver 1304 simply perform transmission.
  • the processing of receiving the data, the further processing is completed by the processor 1301 calling the program, and the invention is not limited thereto.
  • the receiver 1304 is configured to receive K i protocol data unit PDUs sent by the first communications device, where K i is an integer greater than 1, and K i PDUs are generated by K i fountain codewords, where K i
  • K i The mth fountain code code word in the fountain code code word corresponds to the mth PDU in the K i PDUs, m is an integer in the interval [1, K i ], and K i fountain code code words are N i data
  • the block is encoded by the fountain code, and the N i data blocks constitute the i-th data packet, and N i is an integer greater than 1.
  • the processor 1301, configured to acquire T i PDU is a PDU K i T i of received code codeword fountain, T i is [1, K i] within an arbitrary integer.
  • a processor 1301 configured to, when T i fountain fountain codes for code codeword decoded data packet S i-th data packet to the first communication device transmits a first acknowledgment information, the first The acknowledgement information is used to indicate that the second communication device has correctly received the i-th data packet, S is a positive integer, and the value of i is any positive integer from 1 to S.
  • a K i of the m-th PDU PDU contains a sequence number m of the m-th code codeword fountain, at least one of a length of the last data block in the m-th PDU, m is 1 to K i Any positive integer in .
  • the sum of the lengths of the S data packets is less than or equal to the length of the preset window, and the preset window is used to indicate that the data packet sent by the first communications device is the first data packet to the Sth data of the S data packets. data pack.
  • the receiver 1304 is further configured to receive K i+1 PDUs sent by the first communications device, the K i+1 PDUs are generated by K i+1 fountain codewords, and the K i+1 fountain codewords are N. i+1 data blocks are generated, N i+1 data blocks constitute the i+1th data packet in S data packets, N i+1 is an integer greater than 1, and K i+1 is an integer greater than 1.
  • the processor 1301 is further configured to obtain T i+1 fountain code code words according to the T i+1 PDUs received in the K i+1 PDUs, where T i+1 is [1, K i+1 ] Integer.
  • the transmitter 1303 is further configured to send the second state information to the first communications device, where the second state The state information is used to indicate that the second communication device correctly receives the number of PDUs of the (i+1)th data packet in the S data packets, so that the first communications device adjusts the PDU that sends the (i+1)th data packet according to the second state information. At least one of the number of transmissions and the transmission rate.
  • the transmitter 1303 is further configured to: when the duration of time occupied by the PDU that the second communication device has received exceeds the second preset duration, send the second state information to the first communications device.
  • the first communication device and the second communication device are forwarded by the fourth communication device for data transmission;
  • Transmitter 1303 is also configured to send a fourth communication device stops transmitting information to stop transmission of information indicating the fourth communication device discards K PDU i PDU is already stored.
  • the transmitter 1303 is further configured to send link state information to the first communications device, where the link state information is used to indicate the number of PDUs received by the second communications device on the at least one link or a preset time period.
  • the receiver 1304 is further configured to receive configuration information of the first communications device that is sent by the first communications device, where the configuration information of the first communications device includes at least the capability information of the first communications device and the encoding code of the fountain code.
  • the configuration information of the first communications device includes at least the capability information of the first communications device and the encoding code of the fountain code.
  • the capability information of the first communication device is used to indicate that the first communication device supports at least one of a fountain code, a fountain code type supported by the first communication device, and a maximum coding length of the first communication device;
  • the coding code of the fountain code includes the length of the i-th data packet number N i, N i-coding matrix data blocks of at least one of, for coding matrix mapping data indicating a relationship between the block and the fountain code codeword.
  • the second communication device receives the K i protocol data unit PDUs sent by the first communication device, and acquires T i fountain code code words according to the T i PDUs received in the K i PDUs, and the T i
  • the fountain code code word is used to decode the fountain code.
  • the second communication device decodes the fountain code code of the T i fountain code codes to obtain the i-th data packet in the S data packets, the first affirmation is sent to the first communication device. Answer the message.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the embodiment of the present invention provides a data transmission system for performing the data transmission method described in the embodiments corresponding to FIG. 2 and FIG. 6 above.
  • the data transmission system provided in the embodiment may also perform the data transmission method described in the embodiment corresponding to FIG. 4, FIG. 7, FIG. 8, and FIG. 9.
  • the data transmission system provided in this embodiment may be corresponding to FIG.
  • the data transmission system provided in this embodiment can be applied to data transmission of the RLC layer or the PDCP layer.
  • the data transmission system 140 provided by this embodiment includes: a first communication device 1401 and a second communication device 1402.
  • the first communication device 1401 is the first communication device described in the embodiment corresponding to FIG. 10, and the second communication device 1402 is the second communication device described in the embodiment corresponding to FIG. 11;
  • the first communication device 1401 is the first communication device described in the embodiment corresponding to FIG. 12, and the second communication device 1402 is the second communication device described in the embodiment corresponding to FIG.
  • the data transmission system includes: a first communication device and a second communication device, wherein the first communication device acquires an i-th data packet in the S data packets, and divides the i-th data packet into N i Data blocks, and encoding the N i data blocks into a fountain code to generate K i fountain code code words; generating K i protocol data unit PDUs according to the K i fountain code code words, and transmitting K i to the second communication device
  • the PDUs when receiving the first acknowledgement information sent by the second communication device, stop transmitting the PDUs to be sent in the K i PDUs to the second communication device according to the first acknowledgement information.
  • the second communication device only needs to send a feedback message to the first communication device after obtaining the complete i-th data packet, and does not need to feedback the reception status of each PDU, thereby greatly reducing the feedback information, saving network resources, and solving
  • ACK information or NACK information occupies excessive network resources, which affects the efficiency of system data transmission.
  • the first communication device can simultaneously transmit multiple data packets to the second communication device by using the fountain code, realize multi-process data transmission, improve data transmission efficiency of the wireless network communication system, and solve the wireless network communication system in the prior art. The problem of low data transmission efficiency.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明公开了数据传输方法、设备及系统，涉及通信领域，能够解决现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。具体方案为：第一通信设备获取第i个数据包，将第i个数据包分为N个数据块，并将N个数据块进行喷泉码编码生成K个喷泉码码字；根据K个喷泉码码字生成K个协议数据单元PDU并向第二通信设备发送K个PDU，当第一通信设备接收到第二通信设备发送的第一肯定应答信息时，第一通信设备根据第一肯定应答信息停止向第二通信设备发送K个PDU中待发送的PDU。本发明用于数据传输。

Description

数据传输方法、设备及系统 技术领域
本发明涉及通信领域，特别涉及数据传输方法、设备及系统。
背景技术
在无线网络通信系统中，例如通用移动通信系统(英文：Universal Mobile Telecommunications System，简称：UMTS)、码分多址(英文：Code Division Multiple Access，简称：CDMA)系统、全球移动通信系统(英文：Global System for Mobile Communications，简称：GSM)、无线保真(英文：Wireless-Fidelity，简称：WIFI)系统等，优选的，可以是在长期演进(英文：Long Term Evolution，简称：LTE)系统中，为保证数据传输的可靠性，通常会采用自动重传请求(英文：Automatic Repeat Request，简称：ARQ)机制或混合自动重传请求(英文：HybridAutomatic Repeat Request，简称：HARQ)机制进行数据重传。例如在通信协议的无线链路控制协议(英文：Radio Link Control Protocol，简称：RLC)层和分组数据汇聚协议(英文：Packet Data Convergence Protocol，简称：PDCP)层都使用这两种重传机制进行数据传输。其基本原理是：在数据传输过程中，以第一通信设备和第二通信设备之间的数据传输为例，当第二通信设备正确接收到数据包时，会向第一通信设备发送肯定应答(英文：Acknowledgement，简称：ACK)信息；当第二通信设备不能正确接收数据包时，会向第一通信设备发送否定应答(英文：Negative Acknowledgment，简称：NACK)信息，表明该数据包需要重新发送。
具体的，以发送一个数据包为例，第一通信设备将数据包进行编码，然后分为多个协议数据单元(英文：Protocol Data Unit，简称：PDU)进行传输，PDU为数据传输的单位，第二通信设备对每一个接收到的PDU都要进行反馈，以确保第二通信设备接收到所有PDU，然后解码获取该数据包。
在实现上述方案的过程中，在无线通信网络中采用ARQ和HARQ机制传输数据时，第二通信设备对每一个接收到的PDU都要进行反馈，ACK信息或NACK信息占用了过多网络资源，尤其是当用户较多时，这种重传机制会严重影响系统数据传输的效率。
发明内容
为了解决在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题，本发明提供了数据传输方法、设备及系统。所述技术方案如下：
第一方面，本发明提供一种数据传输方法，该方法包括：
第一通信设备获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数；
第一通信设备将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数；
第一通信设备根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU；
当第一通信设备接收到第二通信设备发送的第一肯定应答信息时，第一通信设备根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包。
示例性的，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数。第一肯定应答信息为第二通信设备在接收到Ti个PDU之后发送的，Ti为[1，Ki]内的整数，Ti为Ki个PDU中第二通信设备接收到的PDU个数。
需要说明的是，第一通信设备向第二通信设备发送Ki个PDU只表示第一通信设备开始执行向第二通信设备发送Ki个PDU的动作，并不代表第一通信设备向第二通信设备从开始发送Ki个PDU到Ki个PDU发送完成的完整过程。
示例性的，第一通信设备为基站eNB，第二通信设备为用户设备UE；或者，第一通信设备为UE，第二通信设备为eNB。第i个数据包为无线链路控制RLC层数据包；或者，第i个数据包为分组数据汇聚协议PDCP层数据包。
在一种可能的实现中，第一通信设备在生成Ki个喷泉码码字、生成Ki个PDU、发送Ki个PDU的过程中，可以分步进行，也可以同步进行。分步进行时，可以依次生成Ki个喷泉码码字，然后根据生成好的Ki个喷泉码码字依次生成Ki个PDU，再将生成好的Ki个PDU依次向第二通信设备发送。同步进行时，可以依次生成Ki个喷泉码码字，依次生成Ki个PDU，在已经生成第1个喷泉码码字后，根据第1个喷泉码码字生成第1个PDU的同时，生成第2 个喷泉码码字，在发送第1个PDU的同时，根据第2个喷泉码码字生成第2个PDU，即生成喷泉码码字、生成PDU，发送PDU这三个操作同时进行。
可选的，以数据包为例，第i个数据包可以是多个数据包通过级联的方式形成的一个大的数据包。
在一种可能的实现中，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包，第一通信设备将i个数据包分为Ni个数据块之后，该方法还包括：
第一通信设备将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；第一通信设备根据Ki+1个喷泉码码字生成Ki+1个PDU，并向第二通信设备发送Ki+1个PDU。
在一种可能的实现中，当第一通信设备接收到第二通信设备发送的第一肯定应答信息之后，该方法还包括：
当i的取值为1时，第一通信设备将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
在一种可能的实现中，该方法还包括：
当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，第一通信设备丢弃第i个数据包；
当i的取值为1时，第一通信设备将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
在一种可能的实现中，该方法还包括：
第一通信设备接收第二通信设备发送的第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数；
第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
在一种可能的实现中，第一通信设备接收第二通信设备发送的第二状态信息，包括：
当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，第一通信设备接收第二通信设备发送的第二状态信息。
在一种可能的实现中，该方法还包括：
第一通信设备向第三通信设备发送切换信息，切换信息用于指示第三通信设备向第二通信设备发送第i个数据包；切换信息包含第i个数据包的序号、喷泉码的编码法则、编码上下文中的至少一项，喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系，编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项；
第一通信设备将第i个数据包或Ki个PDU中待发送的PDU发送至第三通信设备。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
当第一通信设备接收到第二通信设备发送的第一肯定应答信息之后，该方法还包括：
第一通信设备向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
在一种可能的实现中，该方法还包括：
第一通信设备接收第二通信设备发送的链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况；
第一通信设备根据链路状态信息调整分流策略。
在一种可能的实现中，该方法还包括：
第一通信设备向第二通信设备发送第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项；
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
在一种可能的实现中，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
第二方面，本发明提供一种数据传输方法，该方法包括：
第二通信设备接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数；
第二通信设备根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数；
第二通信设备将Ti个喷泉码码字进行喷泉码解码；
当第二通信设备将Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，第二通信设备向第一通信设备发送第一肯定应答信息，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
示例性的，Ki个PDU由Ki个喷泉码码字生成，Ki个喷泉码码字由N个数据块进行喷泉码编码得到，Ni个数据块组成第i个数据包，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数。第一肯定应答信息为第二通信设备在接收到Ti个PDU之后发送的，Ti为[1，Ki]内的整数，Ti为Ki个PDU中第二通信设备接收到的PDU个数。
需要说明的时，此处第二通信设备接收只是一个持续动作，并不是将Ki个PDU全部接收到。
示例性的，第一通信设备为基站eNB，第二通信设备为用户设备UE；或者，第一通信设备为UE，第二通信设备为eNB。第i个数据包为无线链路控制RLC层数据包；或者，第i个数据包为分组数据汇聚协议PDCP层数据包。
可选的，以数据包为例，第i个数据包可以是多个数据包通过级联的方式形成的一个大的数据包。
在一种可能的实现中，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包，该方法还包括：
第二通信设备接收第一通信设备发送的Ki+1个PDU，Ki+1个PDU由Ki+1个喷泉码码字生成，Ki+1个喷泉码码字由Ni+1个数据块生成，Ni+1个数据块组成S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数；
第二通信设备根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数；
第二通信设备将Ti+1个喷泉码码字进行喷泉码解码。
在一种可能的实现中，该方法还包括：
第二通信设备向第一通信设备发送第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数，以便第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
在一种可能的实现中，第二通信设备向第一通信设备发送第二状态信息，包括：
当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，第二通信设备向第一通信设备发送第二状态信息。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
第二通信设备向第一通信设备发送第一肯定应答信息之后，该方法还包括：
第二通信设备向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
在一种可能的实现中，该方法还包括：
第二通信设备向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
在一种可能的实现中，该方法还包括：
第二通信设备接收第一通信设备发送的第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项；
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
在一种可能的实现中，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
第三方面，本发明提供一种第一通信设备，包括：
获取单元，用于获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数；
编码单元，用于将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数；
数据处理单元，用于根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU；
发送单元，用于向第二通信设备发送Ki个PDU；
第一通信设备还包括接收单元，
发送单元，还用于当接收单元接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包。
在一种可能的实现中，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包；
编码单元，还用于将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；
数据处理单元，还用于根据Ki+1个喷泉码码字生成Ki+1个PDU；
发送单元，还用于向第二通信设备发送Ki+1个PDU。
在一种可能的实现中，数据处理单元，还用于在接收单元接收到第二通信设备发送的第一肯定应答信息之后，当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
在一种可能的实现中，当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，
获取单元，还用于丢弃第i个数据包；
数据处理单元，还用于当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
在一种可能的实现中，接收单元，还用于接收第二通信设备发送的第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数；
发送单元，还用于根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
在一种可能的实现中，接收单元，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，接收第二通信设备发送的第二状态信息。
在一种可能的实现中，发送单元，还用于向第三通信设备发送切换信息，切换信息用于指示第三通信设备向第二通信设备发送第i个数据包；切换信息包含第i个数据包的序号、喷泉码的编码法则、编码上下文中的至少一项，喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系，编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项；
发送单元，还用于将第i个数据包或Ki个PDU中待发送的PDU发送至第三通信设备。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
发送单元，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
在一种可能的实现中，接收单元，还用于接收第二通信设备发送的链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况；
发送单元，还用于根据接收单元接收到的链路状态信息调整分流策略。
在一种可能的实现中，发送单元，还用于向第二通信设备发送第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项；
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
在一种可能的实现中，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
第四方面，本发明提供一种第二通信设备，包括：
接收单元，用于接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数；
数据处理单元，用于根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数；
解码单元，用于将Ti个个喷泉码码字进行喷泉码解码；
发送单元，用于当解码单元将Ti个个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
在一种可能的实现中，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包；
接收单元，还用于接收第一通信设备发送的Ki+1个PDU，Ki+1个PDU由Ki+1个喷泉码码字生成，Ki+1个喷泉码码字由Ni+1个数据块生成，Ni+1个数据块组成S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数；
数据处理单元，还用于根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数；
解码单元，还用于将Ti+1个喷泉码码字进行喷泉码解码。
在一种可能的实现中，发送单元，还用于向第一通信设备发送第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数，以便第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
在一种可能的实现中，发送单元，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，向第一通信设备发送第二状态信息。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
发送单元，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
在一种可能的实现中，发送单元，还用于向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的 数量或者预设时间段内的数据接收情况。
在一种可能的实现中，接收单元，还用于接收第一通信设备发送的第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项；
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
在一种可能的实现中，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
第七方面，本发明提供一种数据传输系统，包括：第一通信设备和第二通信设备；
第一通信设备为第三方面或第三方面的任意一种可能的实现方式中所描述的第一通信设备，第二通信设备为第四方面或第四方面的任意一种可能的实现方式中所描述的第二通信设备。
本发明提供的数据传输方法、设备及系统，第一通信设备获取S个数据包中的第i个数据包；将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字；根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU；当接收到第二通信设备发送的第一肯定应答信息时，第一通信设备根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包。这样，第二通信设备正确接收第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。进一步的，第一通信设备可以利用喷泉码同时向第二通信设备发送多个数据包，实现多进程数据传输，提高了无线网络通信系统的数据传输效率，解决了现有技术中无线网络通信系统数据传输效率低的问题。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本发明。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种无线网络通信系统结构示意图；
图2是本发明实施例提供的一种数据传输方法流程示意图；
图3是本发明实施例提供的一种喷泉码编码原理示意图；
图4是本发明实施例提供的另一种数据传输方法流程示意图；
图5是本发明实施例提供的一种预设窗口迁移效果示意图；
图6是本发明另一实施例提供的一种数据传输方法流程示意图；
图7是本发明另一实施例提供的另一种数据传输方法流程示意图；
图8是本发明实施例提供的一种通信设备切换场景示意图；
图9是本发明实施例提供的一种多链路场景示意图；
图10是本发明实施例提供的一种第一通信设备结构示意图；
图11是本发明实施例提供的一种第二通信设备结构示意图；
图12是本发明实施例提供的另一种第一通信设备结构示意图；
图13是本发明实施例提供的另一种第二通信设备结构示意图；
图14是本发明实施例提供的一种数据传输系统结构示意图。
通过上述附图，已示出本发明明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本发明构思的范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
本发明实施例提供的数据传输方法及设备可以应用在无线网络通信系统中，例如通用移动通信系统(英文：Universal Mobile Telecommunications System，简称：UMTS)、码分多址(英文：Code Division Multiple Access，简称：CDMA)系统、全球移动通信系统(英文：Global System for Mobile Communications， 简称：GSM)、无线保真(英文：Wireless-Fidelity，简称：WIFI)系统和以长期演进(英文：Long Term Evolution，简称：LTE)系统等。本发明实施例以LTE系统为例，提供一种无线网络通信系统，如图1所示，该无线网络通信系统10包括：第一演进节点B(英文：Evolved Node B，简称：eNB)101、第二eNB102、第三eNB103、第一UE(User Equipment，用户设备)104、第二UE105、第三UE106、第一移动管理实体(英文：Mobility Management Entity，简称：MME)107、第二MME108。本发明提供的数据传输方法可以应用于该无线网络通信系统10中各个通信设备之间的数据传输，例如MME与eNB之间，eNB与UE之间，eNB相互之间，当然，此处只是举例说明，并不代表本发明局限于此，MME也可以是服务网关(英文：Serving GateWay，简称：S-GW)，该无线网络通信系统10也可以包含其他通信设备，此处只是列举几个常见的网络设备进行说明。本发明实施例提供的数据传输方法也同样适用于其他通信系统，例如在第三代移动通信(英文：3rd Generation，简称：3G)系统中，本发明实施例提供的数据传输方法可以用于核心网(英文：Core Net，简称：CN)、无线网络控制器(英文：Radio Network Controller，简称：RNC)、UE之间的数据传输；在第二代移动通信(英文：2Generation，简称：2G)系统中，本发明实施例提供的数据传输方法可以用于CN、基站收发信台(英文：Base Transceiver Station，简称：BTS)、UE之间的数据传输；在WIFI系统中，本发明实施例提供的数据传输方法可以用于接入点(英文：Access Point，简称：AP)和站点(Station)之间的数据传输。
本发明实施例提供一种数据传输方法，该数据传输方法应用于第一通信设备，该第一通信设备为数据传输中的发送侧设备。优选的，在图1所示的无线网络通信系统10中，该第一通信设备可以是MME、eNB或UE中的任意一个。参照图2所示，本实施例提供的数据传输方法包括以下步骤：
201、第一通信设备获取S个数据包中的第i个数据包。
S为正整数，i的取值为1到S中任意一个正整数。可选的，该第i个数据包可以包括一个或多个数据包、一个或多个报文、一个或多个数据帧、一个或多个数据段，在不同的传输场景中，该数据包的形式是不同的，本发明对此不做限制。可选的，以数据包为例，第i个数据包可以是多个数据包通过级联的方式形成的一个大的数据包。
优选的，本实施例提供的数据传输方法可以应用于无线链路控制(英文：Radio Link Control Protocol，简称：RLC)层或分组数据汇聚协议(英文：Packet Data Convergence Protocol，简称：PDCP)层的数据传输。
202、第一通信设备将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字。
其中，Ni为大于1的整数，Ki为大于1的整数。具体的，喷泉码的原理如图3所示，图3中以第i个数据包是一个数据包为例，将第i个数据包分为Ni个数据块，在Ni个数据块，在Ni个数据块中任意选取多个数据块进行编码生成一个喷泉码码字，这样不断进行编码，就会产生源源不断的码字用以发送，而第二通信设备(本实施例中为第二通信设备)接收到码字之后进行解码得到原始的数据块，当接收到一定量的码字之后，就可以完全获取Ni个数据块从而得到原始的数据包(本实施例中即第i个数据包)。因为编码的时候是在Ni个数据块中任意选取多个进行编码，这样，即便在传输过程中丢失了若干个码字，因为后续还可以继续接收新的码字，就不会影响整体的解码过程，这种传输方式容错率较高。
可选的，以Ni取值是10为例进行说明，喷泉码编、解码过程如下：
第一通信设备接收一个数据包，分成大小相等的10块，每个数据块编号分别为1，2……10；对10个数据块进行喷泉码编码，例如，对第1和第2个数据块进行异或运算得到喷泉码码字1；对第3、第5和第10个数据块进行异或运算得到喷泉码码字2。其中，选择多个数据块进行异或等运算的信息即称其为编码矩阵，可用一个随机序列来表示。在第二通信设备侧，对喷泉码码字进行编码矩阵的逆操作，可还原出数据块。例如，得到了数据块1，则可以将数据块1和喷泉码码字1进行异或操作来译码，可得到数据块2，只要得到足够数量的喷泉码码字，就可通过译码操作得到全部的10个数据块。
203、第一通信设备根据Ki个喷泉码码字生成Ki个协议数据单元(英文：Protocol Data Unit，简称：PDU)。
其中，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数。
可选的，依照传输场景的不同，PDU的数据形式也不同，例如，物理层的PDU是数据位(bit)，数据链路层的PDU是数据帧(frame)，网络层的PDU是数据包(packet)，传输层的PDU是数据段(segment)，其他更高层次的PDU 是报文(message)等。
在不同的传输场景中，生成PDU的方式也不尽相同。例如，在PDCP层，需要对Ki个喷泉码码字分别进行PDCP层的加密、完整性保护、加头等处理，可选的，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，具体可选的，可以将第m个喷泉码码字的序号m和第m个PDU中最后一个数据块的长度置于第m个PDU的头部；另外，可选的，也可以在第m个PDU的头部携带喷泉码的编码法则，该喷泉码的编码法则可以包含编码的数据长度(本实施例中为第i个数据包的长度)、分割的块数(本实施例中为Ni个数据块的个数)、编码矩阵中的至少一项，其中，编码矩阵是指从源码字到目标码字的映射关系，在本实施例中，即为数据块与喷泉码码字之间的映射关系。
204、第一通信设备向第二通信设备发送Ki个PDU。
可选的，第一通信设备在生成Ki个喷泉码码字、生成Ki个PDU、发送Ki个PDU的过程中，可以分步进行，也可以同步进行。分步进行时，可以依次生成K个喷泉码码字，然后根据生成好的Ki个喷泉码码字依次生成Ki个PDU，再将生成好的Ki个PDU依次向第二通信设备发送。同步进行时，可以依次生成Ki个喷泉码码字，依次生成Ki个PDU，在已经生成第1个喷泉码码字后，根据第1个喷泉码码字生成第1个PDU的同时，生成第2个喷泉码码字，在发送第1个PDU的同时，根据第2个喷泉码码字生成第2个PDU，即生成喷泉码码字、生成PDU，发送PDU这三个操作同时进行。当然，此处只是举例说明，并不代表本发明局限于此。
可选的，当第一通信设备通过多条链路向第二通信设备传输数据时，第一通信设备还可以接收第二通信设备发送的链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况，第一通信设备可以根据链路状态信息调整分流策略。
205、当第一通信设备接收到第二通信设备发送的第一肯定应答信息时，第一通信设备根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU。
优选的，第一肯定应答信息为第二通信设备在接收到Ti个PDU之后发送的，用于指示第二通信设备已经正确接收第i个数据包，Ti为[1，Ki]内的整数，Ti为Ki个PDU中第二通信设备接收到的PDU个数。
优选的，结合步骤204，第一通信设备向第二通信设备发送Ki个PDU只表示第一通信设备开始执行向第二通信设备发送Ki个PDU的动作，并不代表第一通信设备向第二通信设备从开始发送Ki个PDU到Ki个PDU发送完成的完整过程。
需要说明的是，步骤205是第二通信设备正确接收第i个数据包的情况，在实际实现的过程中，有可能会出现异常情况，此时，也会停止第i个数据包的传输。例如，当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，第一通信设备停止向第二通信设备发送Ki个PDU中待发送的PDU；在一种应用场景中，如果第一通信设备收到第二通信设备发送的NACK信息，可以继续发送PDU，直到Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量，则终止发送。
结合图3所示意的喷泉码原理，当第二通信设备接收若干个PDU后，就可以经过解码得到完整的第i个数据包，此时即可停止向第二通信设备发送第Ki个PDU中待发送的PDU，第二通信设备接收的PDU个数并不固定，因为喷泉码的编码是在Ni个数据块中随机选择多个进行编码。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要像现有技术中一样，将第i个数据包生成多个PDU发送后，反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源。
另外，可选的，第一通信设备可以向第二通信设备发送第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。优选的，第一通信设备可以通过广播的方式向第二通信设备发送第一通信设备的配置信息。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的数据传输方法，第一通信设备获取S个数据包中的第i个数据包，将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码 生成Ki个喷泉码码字；根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU，当接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
基于上述图1对应的实施例所描述的数据传输方法，本发明实施例提供另一种数据传输方法，应用于图1对应的实施例中数据传输方法发送侧主体——第一通信设备。本实施例提供的数据传输方法，在执行图1对应的实施例中所描述的数据传输方法时，可以实现多进程数据传输，本实施例中以数据包的传输为例进行说明。
具体的，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。可选的，该预设窗口的长度可以自行调节，本实施例以预设窗口的长度为S个数据包的长度为例进行说明。进一步的，S个数据包中每个数据包，可以是多个数据单位级联得到的固定长度的数据包，可以采用相同的喷泉码编码法则。参照图4，第一通信设备将i个数据包分为Ni个数据块之后，本实施例提供的数据传输方法包括以下步骤：
401、第一通信设备将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字。
需要说明的时，步骤401在第一通信设备将S个数据包中的第i+1个数据包分为Ni+1个数据块之后执行，其中，Ni+1为大于1的整数，Ki+1为大于1的整数。
402、第一通信设备根据Ni+1个喷泉码码字生成Ni+1个PDU。
403、第一通信设备向第二通信设备发送Ni+1个PDU。
需要说明的是，在执行步骤401-403的过程中，第一通信设备对S个数据包中的每一个数据包依次执行步骤401-403的操作，每个数据包的处理过程互相独立，在前一个数据包分割为多个数据块之后，即可对下一个数据包进行处 理，这样就可以实现在预设窗口的长度中同时传输多个数据包。
在数据传输的过程中，预设窗口会发生右移，本实施例列举三种可能的实现方式：
可选的，在第一通信设备接收到第二通信设备发送的第一肯定应答信息之后，当i的取值为1时，第一通信设备将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
或者，可选的，当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，第一通信设备丢弃第i个数据包；当i的取值为1时，第一通信设备将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
参照图5所示，预设窗口指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。在上述三种可能的实现方式中，当第1个数据包正确接收、或者接收超时，都会停止对第1个数据包的传输，预设窗口进行右移，变成了从第2个数据包到第S+1个数据包，在实际实现的过程中，每一个数据包可以有一个序号，以此确定预设窗口的范围。
优选的，本实施例提供的数据传输方法还可以包括：第一通信设备接收第二通信设备发送的第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数；第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。可选的，可以是当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，第一通信设备接收第二通信设备发送的第二状态信息。需要说明的是，第二状态信息可以携带在肯定应答信息或否定应答信息中发送至第一通信设备，当然，此处只是举例说明，并不代表本发明局限于此。
在多进程数据传输的场景中，当第二通信设备向第一通信设备发送反馈信息时，反馈信息中可以包含至少一个其他数据包的状态信息，用以指示其他数据包的接收情况，这样，第一通信设备就可以根据各个数据包的状态信息调整发送各个数据包的PDU的发送数量和发送速率中的至少一项。根据各个数据包的状态信息，可以分别对各个数据包的发送数量和发送速率进行调整，减少了各个数据包PDU的发送冗余，能够充分利用传输资源，提高网络通信系统的传输效率。
本实施例提供的数据传输方法，第一通信设备将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；第一通信设备根据Ki+1个喷泉码码字生成Ki+1个PDU，并向第二通信设备发送Ki+1个PDU。这样，第一通信设备可以利用喷泉码同时向第二通信设备发送多个数据包，实现多进程数据传输，提高了无线网络通信系统的数据传输效率，解决了现有技术中无线网络通信系统数据传输效率低的问题。
结合上述图2对应的实施例，本发明另一实施例提供一种数据传输方法，对应图2对应的实施例中所描述的数据传输方法的接收侧方法，应用于第二通信设备，优选的，在图1所示的无线网络通信系统10中，该第二通信设备可以是MME、eNB或UE中的任意一个。参照图6所示，本实施例提供的数据传输方法包括以下步骤：
601、第二通信设备接收第一通信设备发送的Ki个协议数据单元PDU。
Ki为大于1的整数，Ki个PDU由Ki个喷泉码码字生成，其中，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数，Ki个喷泉码码字由Ni个数据块进行喷泉码编码得到，Ni个数据块组成第i个数据包，Ni为大于1的整数。可选的，第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项。
需要说明的时，此处第二通信设备接收只是一个持续动作，并不是将Ki个PDU全部接收到，结合图2对应的实施例中的描述，第二通信设备依次接收PDU，当第二通信设备所接收的PDU经过解码能够得到第i个数据包后，即可停止接收第i个数据包所产生的PDU。
602、第二通信设备根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字。
其中，Ti为[1，Ki]内的整数。
需要说明的时，在不同的传输场景中，PDU生成的方式也不尽相同。例如，在PDCP层，需要对Ki个喷泉码码字分别进行PDCP层的加密、完整性保护、加头等处理，因此，相应的，第二通信设备接收到PDU后，要进行去头、完整性验证、解密等处理。可选的，第m个PDU包含第m个喷泉码码字的序号 m、第m个PDU中最后一个数据块的长度中的至少一项，可选的，可以将第m个喷泉码码字的序号m和第m个PDU中最后一个数据块的长度置于第m个PDU的头部；另外，可选的，也可以在第m个PDU的头部携带喷泉码的编码法则，该喷泉码的编码法则可以包含编码的数据长度(本实施例中为第i个数据包的长度)、分割的块数(本实施例中为Ni个数据块的个数)、编码矩阵中的至少一项，其中，编码矩阵是指从源码字到目标码字的映射关系，在本实施例中，即为数据块与喷泉码码字之间的映射关系。
可选的，当第一通信设备通过多条链路向第二通信设备传输数据时，第二通信设备还可以向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况，以便第一通信设备根据链路状态信息调整分流策略。
603、第二通信设备将Ti个喷泉码码字进行喷泉码解码。
604、当第二通信设备将Ti个喷泉码码字进行喷泉码解码得到第i个数据包时，第二通信设备向第一通信设备发送第一肯定应答信息。
第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包。
需要说明的是，步骤604是第二通信设备正确接收第i个数据包的情况，在实际实现的过程中，有可能会出现异常情况，当第二通信设备在一定时间内无法正确接收第i个数据包时，第二通信设备可以向第一通信设备发送NACK信息。另外，可选的，第二通信设备还可以接收第一通信设备发送的第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。优选的，第一通信设备可以通过广播的方式向第二通信设备发送第一通信设备的配置信息。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的数据传输方法，第二通信设备接收第一通信设备发送的Ki个协议数据单元PDU，根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，将Ti个喷泉码码字进行喷泉码解码，当第二通信设备将Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息。这样，第二通信设备只需要在获得完整的第i个数据包 之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
基于上述图6对应的实施例所描述的数据传输方法，本发明另一实施例提供另一种数据传输方法，应用于图6对应的实施例中数据传输方法接收侧主体——第二通信设备。本实施例提供的数据传输方法，在执行图6对应的实施例中所描述的数据传输方法时，可以实现多进程数据传输，本实施例中以数据包的传输为例进行说明。
S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包，。可选的，该预设窗口的长度可以自行调节，本实施例以预设窗口的长度为S个数据包的长度为例进行说明。参照图7，本实施例提供的数据传输方法包括以下步骤：
701、第二通信设备接收第一通信设备发送的Ki+1个PDU。
Ki+1个PDU由Ki+1个喷泉码码字生成，Ki+1个喷泉码码字由Ni+1个数据块生成，Ni+1个数据块组成S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数。
702、根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字。
其中，Ti+1为[1，Ki+1]内的整数。
703、第二通信设备将Ti+1个喷泉码码字进行喷泉码解码。
需要说明的是，在执行步骤701-703的过程中，第二通信设备对S个数据包中的每一个数据包依次执行步骤701-703的操作，每个数据包的处理过程互相独立，同时接收S个数据包所产生的PDU，并对接收到的PDU进行喷泉码解码，这样就可以实现在预设窗口的长度中同时接收多个数据包。
另外，可选的，第二通信设备还可以向第一通信设备发送第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数，以便第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。可选的，可以是当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，第二通信设备向第一通信 设备发送第二状态信息。
本实施例提供的数据传输方法，第二通信设备接收第一通信设备发送的Ki+1个PDU，根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，将Ti+1个喷泉码码字进行喷泉码解码。这样，第二通信设备可以利用喷泉码同时接收第一通信设备发送的多个数据包，实现多进程数据传输，提高了无线网络通信系统的数据传输效率，解决了现有技术中无线网络通信系统数据传输效率低的问题。
基于上述图2和图6对应的实施例，优选的，可以结合图4和图7对应的实施例，本发明实施例在通信设备切换的场景中对本发明提供的数据传输方法进行说明，第一通信设备向第二通信设备传输数据，要切换至第三通信设备向第二通信设备传输数据，优选的，参照图1所示的无线网络通信系统10，第一通信设备可以是第一eNB101，第三通信设备可以是第二eNB102，在上行数据传输的过程中，第二通信设备为第一MME107，在下行数据传输的过程中，第二通信设备为第一UE104。当然，此处只是举例说明，并不代表本发明局限于此。参照图8所示，图8中以eNB和UE进行下行数据传输为例进行说明。
图8所示的通信设备切换场景包含源eNB801、目标eNB802，UE803以及S-GW804。具体的，在本实施例中，第一通信设备为源eNB801，第二通信设备为UE803，第三通信设备为目标eNB802。
当发生切换时，第一通信设备向第三通信设备发送切换信息，切换信息用于指示第三通信设备向第二通信设备发送第i个数据包；切换信息包含第i个数据包的序号、喷泉码的编码法则、编码上下文中的至少一项，喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系，编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项。
并且，第一通信设备将第i个数据包或Ki个PDU中待发送的PDU发送至第三通信设备。此处，需要说明的时，第一通信设备可以只将第i个数据包发送至第三设备，第三通信设备就可以根据切换信息，将第i个数据包分割为Ni个数据块，生成喷泉码码字，并生成PDU向第二通信设备发送；或者，第一通信设备可以只向第三设备发送Ki个PDU中待发送的PDU，结合喷泉码的原理，由第一通信设备生成PDU，将PDU发送至第三通信设备，第三通信设备 将PDU发送至第二通信设备；或者，第一通信设备可以将第i个数据包和Ki个PDU中待发送的PDU一起发送至第三通信设备。当然，此处只是举例说明，并不代表本发明局限于此。
可选的，第一通信设备将已经发送，但尚未收到第二通信设备确认接收的PDU发送至第三通信设备；第一通信设备将S-GW804发送的新的数据传输至第三通信设备。
这样，在第一通信设备与第三通信设备的切换过程中保证了数据传输的连续性。
基于上述图2和图6对应的实施例，优选的，可以结合图4和图7对应的实施例，本发明实施例在多链路场景中对本发明提供的数据传输方法进行说明，在第一条链路中，第一通信设备直接向第二通信设备传输数据；第二条链路中，第一通信设备通过第四通信设备转发，向第二通信设备传输数据，优选的，参照图1所示的无线网络通信系统10，第一通信设备可以是第一eNB101，第三通信设备可以是第二eNB102，在上行数据传输的过程中，第二通信设备为第一MME107，在下行数据传输的过程中，第二通信设备为第一UE104。当然，此处只是举例说明，并不代表本发明局限于此。参照图9所示，图9中以eNB和UE进行下行数据传输为例进行说明。
图9所示的多链路场景包含宏eNB901、微eNB902，UE903以及S-GW904。具体的，在本实施例中，第一通信设备为宏eNB901，第二通信设备为UE903，第三通信设备为微eNB902。
如图9所示，宏eNB901接收来自S-GW904的S个数据包中的第i个数据包，经过喷泉码编码处理后，生成PDU向微eNB902和UE903发送，微eNB902将宏eNB901发送的PDU再转发至UE903。
在多条链路传输的场景下，第二通信设备(第二通信设备、UE903)无需对多条链路上接收到的PDU进行排序，只需要进行合并解码，提升了数据接收解码的效率，并且充分利用了网络通信系统的资源，提高了网络通信系统传输数据的效率。
当第一通信设备(eNB901)接收到第二通信设备(UE903)发送的第一肯定应答信息之后，第一通信设备向第四通信设备(微eNB902)发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。 或者，由第二通信设备向第四通信设备发送停止传输信息。
可选的，第二通信设备还可以向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况，第一通信设备根据第二通信设备发送的链路状态信息调整分流策略。具体可选的，如果链路状态信息指示经第四通信设备转发至第二通信设备的链路状况较好，第一通信设备就可以将更多的PDU传输至第四通信设备，减少直接传输至第二通信设备的PDU数量，当然，此处只是举例说明，并不代表本发明局限于此。
结合上述图2对应的实施例，本发明实施例提供一种第一通信设备，用于执行上述图2对应的实施例中所描述的数据传输方法。可选的，本实施例提供的第一通信设备也可以执行图4、图8、图9对应的实施例中所描述的数据传输方法。
优选的，本实施例提供的第一通信设备应用于RLC层或PDCP层的数据传输。
参照图10所示，本实施例提供的第一通信设备100包括：获取单元1001、编码单元1002、数据处理单元1003、发送单元1004、接收单元1005。
其中，获取单元1001，用于获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
编码单元1002，用于将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数。
数据处理单元1003，用于根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU。
发送单元1004，用于向第二通信设备发送Ki个PDU。
第一通信设备100还包括接收单元1005，
发送单元1004，还用于当接收单元1005接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，第一肯定应答信息可以是第二通信设备在接收到Ti个PDU之后发送的，Ti为[1，Ki]内的整数，Ti为Ki个PDU中第二通信设备接收到的PDU个 数。
其中，可选的，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
可选的，在第一种应用场景中，
S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。
编码单元1002，还用于将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数。
数据处理单元1003，还用于根据Ki+1个喷泉码码字生成Ki+1个PDU。
发送单元1004，还用于向第二通信设备发送Ki+1个PDU。
进一步可选的，数据处理单元1003，还用于在接收单元1005接收到第二通信设备发送的反馈信息之后，当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
或者，可选的，当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，
获取单元1001，还用于丢弃第i个数据包。
数据处理单元1003，还用于当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
另外可选的，接收单元1005，还用于接收第二通信设备发送的第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数。
发送单元1004，还用于根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
进一步的，接收单元1005，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，接收第二通信设备发送的第二状态信息。
可选的，在第二种应用场景中，
发送单元1004，还用于向第三通信设备发送切换信息，切换信息用于指示第三通信设备向第二通信设备发送第i个数据包；切换信息包含第i个数据包 的序号、喷泉码的编码法则、编码上下文中的至少一项，喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系，编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项。
发送单元1004，还用于将第i个数据包或Ki个PDU中待发送的PDU发送至第三通信设备。
可选的，在第三种应用场景中，
第一通信设备与第二通信设备通过第四通信设备转发进行数据传输。
发送单元1004，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
可选的，接收单元1005，还用于接收第二通信设备发送的链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
发送单元1004，还用于根据接收单元1005接收到的链路状态信息调整分流策略。
可选的，发送单元1004，还用于向第二通信设备发送第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的第一通信设备，获取S个数据包中的第i个数据包，将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字；根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU，当接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
结合上述图6对应的实施例，本发明实施例提供一种第二通信设备，用于执行上述图6对应的实施例中所描述的数据传输方法。可选的，本实施例提供的第二通信设备也可以执行图7、图8、图9对应的实施例中所描述的数据传输方法。
优选的，本实施例提供的第二通信设备应用于RLC层或PDCP层的数据传输。
参照图11所示，本实施例提供的第二通信设备110包括：接收单元1101、数据处理单元1102、解码单元1103、发送单元1104。
其中，接收单元1101，用于接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数，Ki个PDU由Ki个喷泉码码字生成，其中，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数，Ki个喷泉码码字由Ni个数据块进行喷泉码编码得到，Ni个数据块组成第i个数据包，Ni为大于1的整数。
数据处理单元1102，用于根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数。
解码单元1103，用于将Ti个个喷泉码码字进行喷泉码解码。
发送单元1104，用于当解码单元1103将Ti个个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
其中，可选的，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
可选的，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。
接收单元1101，还用于接收第一通信设备发送的Ki+1个PDU，Ki+1个PDU由Ki+1个喷泉码码字生成，Ki+1个喷泉码码字由Ni+1个数据块生成，Ni+1个数据块组成S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数；
数据处理单元1102，还用于根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数；
解码单元1103，还用于将数据处理单元1102获取的Ti+1个喷泉码码字进行喷泉码解码。
可选的，发送单元1104，还用于向第一通信设备发送第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数，以便第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
进一步的，发送单元1104，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，向第一通信设备发送第二状态信息。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
发送单元1104，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
可选的，发送单元1104，还用于向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
可选的，接收单元1101，还用于接收第一通信设备发送的第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的第二通信设备，接收第一通信设备发送的Ki个协议数据单元PDU，根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，将Ti个喷泉码码字进行喷泉码解码，当第二通信设备将Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输 时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
结合上述图2对应的实施例，本发明实施例提供另一种第一通信设备，用于执行上述图2对应的实施例中所描述的数据传输方法。可选的，本实施例提供的第一通信设备也可以执行图4、图8、图9对应的实施例中所描述的数据传输方法。
优选的，本实施例提供的第一通信设备应用于RLC层或PDCP层的数据传输。
参照图12所示，本实施例提供的第一通信设备120包括：处理器1201，存储器1202、发送器1203、接收器1204和总线1205；总线1205用于连接处理器1201、存储器1202、发送器1203和接收器1204，处理器1201用于执行存储器1202中存储的程序。需要说明的是，发送器1203和接收器1204可以有各自独立的程序进行控制，例如，发送器1203和接收器1204可以有单独的芯片，或者，发送器1203和接收器1204只是单纯地完成发送和接收数据的处理，进一步的处理过程由处理器1201调用程序完成，对此本发明不做限制。
其中，处理器1201，用于获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数；将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数；根据Ki个喷泉码码字生成Ki个协议数据单元PDU。
发送器1203，用于向第二通信设备发送Ki个PDU。
发送器1203，还用于当接收器1204接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，第一肯定应答信息可以是第二通信设备在接收到Ti个PDU之后发送的，Ti为[1，Ki]内的整数，Ti为K个PDU中第二通信设备接收到的PDU个数。
其中，可选的，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
可选的，在第一种应用场景中，
S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第 一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。
处理器1201，还用于将S个数据包中的第i+1个数据包分为Ni+1个数据块，并将Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；第一通信设备根据Ki+1个喷泉码码字生成Ki+1个PDU。
发送器1203，还用于向第二通信设备发送Ki+1个PDU。
进一步可选的，处理器1201，还用于在接收器1204接收到第二通信设备发送的反馈信息之后，当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
可选的，当Ki个PDU中第一通信设备向第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者Ki个PDU中，第一通信设备向第二通信设备已经发送的PDU个数超过预设数量时，处理器1201，还用于丢弃第i个数据包。当i的取值为1时，将预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
另外可选的，接收器1204，还用于接收第二通信设备发送的第二状态信息，第二状态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数。
进一步的，接收器1204，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，接收第二通信设备发送的第二状态信息。
发送器1203，还用于根据接收器1204接收的第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
可选的，在第二种应用场景中，
发送器1203，还用于向第三通信设备发送切换信息，切换信息用于指示第三通信设备向第二通信设备发送第i个数据包；切换信息包含第i个数据包的序号、喷泉码的编码法则、编码上下文中的至少一项，喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系，编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项。
发送器1203，还用于将第i个数据包或Ki个PDU中待发送的PDU发送至第三通信设备。
可选的，在第三种应用场景中，
第一通信设备与第二通信设备通过第四通信设备转发进行数据传输。
发送器1203，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
可选的，接收器1204，还用于接收第二通信设备发送的链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
发送器1203，还用于根据接收器1204接收到的链路状态信息调整分流策略。
可选的，发送器1203，还用于向第二通信设备发送第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的第一通信设备，获取S个数据包中的第i个数据包，将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字；根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU，当接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
结合上述图6对应的实施例，本发明实施例提供另一种第二通信设备，用于执行上述图6对应的实施例中所描述的数据传输方法。可选的，本实施例提供的第二通信设备也可以执行图7、图8、图9对应的实施例中所描述的数据传输方法。
优选的，本实施例提供的第二通信设备应用于RLC层或PDCP层的数据传输。
参照图13所示，本实施例提供的第二通信设备130包括：包括：处理器 1301，存储器1302、发送器1303、接收器1304和总线1305；总线1305用于连接处理器1301、存储器1302、发送器1303和接收器1304，处理器1301用于执行存储器1302中存储的程序。需要说明的是，发送器1303和接收器1304可以有各自独立的程序进行控制，例如，发送器1303和接收器1304可以有单独的芯片，或者，发送器1303和接收器1304只是单纯地完成发送和接收数据的处理，进一步的处理过程由处理器1301调用程序完成，对此本发明不做限制。
其中，接收器1304，用于接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数，Ki个PDU由Ki个喷泉码码字生成，其中，Ki个喷泉码码字中第m个喷泉码码字与Ki个PDU中第m个PDU相互对应，m为区间[1，Ki]中的整数，Ki个喷泉码码字由Ni个数据块进行喷泉码编码得到，Ni个数据块组成第i个数据包，Ni为大于1的整数。
处理器1301，用于根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数。
发送器1303，用于当处理器1301将Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息，第一肯定应答信息用于指示第二通信设备已经正确接收第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
其中，可选的，Ki个PDU中第m个PDU包含第m个喷泉码码字的序号m、第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
可选的，S个数据包的长度总和小于或等于预设窗口的长度，预设窗口用于指示第一通信设备发送的数据包为S个数据包中的第1个数据包至第S个数据包。
接收器1304，还用于接收第一通信设备发送的Ki+1个PDU，Ki+1个PDU由Ki+1个喷泉码码字生成，Ki+1个喷泉码码字由Ni+1个数据块生成，Ni+1个数据块组成S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数。
处理器1301，还用于根据Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数。
可选的，发送器1303，还用于向第一通信设备发送第二状态信息，第二状 态信息用于指示第二通信设备正确接收S个数据包中第i+1个数据包的PDU的个数，以便第一通信设备根据第二状态信息调整发送第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
进一步的，发送器1303，还用于当第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，向第一通信设备发送第二状态信息。
在一种可能的实现中，第一通信设备与第二通信设备通过第四通信设备转发进行数据传输；
发送器1303，还用于向第四通信设备发送停止传输信息，停止传输信息用于指示第四通信设备丢弃Ki个PDU中已经存储的PDU。
可选的，发送器1303，还用于向第一通信设备发送链路状态信息，链路状态信息用于指示第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
可选的，接收器1304，还用于接收第一通信设备发送的第一通信设备的配置信息，第一通信设备的配置信息包含第一通信设备的能力信息和喷泉码的编码法则中的至少一项。
其中，第一通信设备的能力信息用于指示第一通信设备支持喷泉码、第一通信设备支持的喷泉码类型、第一通信设备的最大编码长度中的至少一项；喷泉码的编码法则包含第i个数据包的长度、Ni个数据块的个数Ni、编码矩阵中的至少一项，编码矩阵用于指示数据块与喷泉码码字之间的映射关系。
本实施例提供的第二通信设备，接收第一通信设备发送的Ki个协议数据单元PDU，根据Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，将Ti个喷泉码码字进行喷泉码解码，当第二通信设备将Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向第一通信设备发送第一肯定应答信息。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。
结合上述图2和图6对应的实施例，本发明实施例提供一种数据传输系统，用于执行上述图2和图6对应的实施例中所描述的数据传输方法。可选的，本 实施例提供的数据传输系统也可以执行图4、图7、图8、图9对应的实施例中所描述的数据传输方法，优选的，本实施例提供的数据传输系统可以是图1对应的实施例中所描述的无线网络通信系统10。
优选的，本实施例提供的数据传输系统可以应用于RLC层或PDCP层的数据传输。
参照图14所示，本实施例提供的数据传输系统140包括：第一通信设备1401和第二通信设备1402。
其中，第一通信设备1401为图10对应的实施例中所描述的第一通信设备，第二通信设备1402为图11对应的实施例中所描述的第二通信设备；
或者，第一通信设备1401为图12对应的实施例中所描述的第一通信设备，第二通信设备1402为图13对应的实施例中所描述的第二通信设备。
本实施例提供的数据传输系统，包括：第一通信设备和第二通信设备，其中，第一通信设备获取S个数据包中的第i个数据包，将第i个数据包分为Ni个数据块，并将Ni个数据块进行喷泉码编码生成Ki个喷泉码码字；根据Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送Ki个PDU，当接收到第二通信设备发送的第一肯定应答信息时，根据第一肯定应答信息停止向第二通信设备发送Ki个PDU中待发送的PDU。这样，第二通信设备只需要在获得完整的第i个数据包之后向第一通信设备发送一个反馈信息，不需要反馈每一个PDU的接收情况，大大减少了反馈信息，节省了网络资源，解决了现有技术中在无线通信网络中进行数据传输时，ACK信息或NACK信息占用过多网络资源，影响系统数据传输效率的问题。进一步的，第一通信设备可以利用喷泉码同时向第二通信设备发送多个数据包，实现多进程数据传输，提高了无线网络通信系统的数据传输效率，解决了现有技术中无线网络通信系统数据传输效率低的问题。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (41)

  1. 一种数据传输方法，其特征在于，所述方法包括：
    第一通信设备获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数；
    所述第一通信设备将所述第i个数据包分为Ni个数据块，并将所述Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数；
    所述第一通信设备根据所述Ki个喷泉码码字生成Ki个协议数据单元PDU，并向第二通信设备发送所述Ki个PDU；
    当所述第一通信设备接收到所述第二通信设备发送的第一肯定应答信息时，所述第一通信设备根据所述第一肯定应答信息停止向所述第二通信设备发送所述Ki个PDU中待发送的PDU，所述第一肯定应答信息用于指示所述第二通信设备已经正确接收所述第i个数据包。
  2. 根据权利要求1所述的方法，其特征在于，所述S个数据包的长度总和小于或等于预设窗口的长度，所述预设窗口用于指示所述第一通信设备发送的数据包为所述S个数据包中的第1个数据包至第S个数据包，所述第一通信设备将所述i个数据包分为Ni个数据块之后，所述方法还包括：
    所述第一通信设备将所述S个数据包中的第i+1个数据包分为Ni+1个数据块，并将所述Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；所述第一通信设备根据所述Ki+1个喷泉码码字生成Ki+1个PDU，并向所述第二通信设备发送所述Ki+1个PDU。
  3. 根据权利要求2所述的方法，其特征在于，当所述第一通信设备接收到所述第二通信设备发送的第一肯定应答信息之后，所述方法还包括：
    当i的取值为1时，所述第一通信设备将所述预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
  4. 根据权利要求2或3所述的方法，其特征在于，所述方法还包括：
    当所述Ki个PDU中所述第一通信设备向所述第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者所述Ki个PDU中，所述所述第一通信设备向所述第二通信设备已经发送的PDU个数超过预设数量时，所述第一通信设备丢弃所述第i个数据包；
    当i的取值为1时，所述第一通信设备将所述预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
  5. 根据权利要求2-4任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备接收所述第二通信设备发送的第二状态信息，所述第二状态信息用于指示所述第二通信设备正确接收所述S个数据包中第i+1个数据包的PDU的个数；
    所述第一通信设备根据所述第二状态信息调整发送所述第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
  6. 根据权利要求5所述的方法，其特征在于，所述第一通信设备接收所述第二通信设备发送的第二状态信息，包括：
    当所述第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，所述第一通信设备接收所述第二通信设备发送的所述第二状态信息。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备向第三通信设备发送切换信息，所述切换信息用于指示所述第三通信设备向所述第二通信设备发送所述第i个数据包；所述切换信息包含所述第i个数据包的序号、所述喷泉码的编码法则、编码上下文中的至少一项，所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系，所述编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项；
    所述第一通信设备将所述第i个数据包或所述Ki个PDU中待发送的PDU发送至所述第三通信设备。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述第一通信设备与所述第二通信设备通过第四通信设备转发进行数据传输；
    当所述第一通信设备接收到所述第二通信设备发送的第一肯定应答信息之后，所述方法还包括：
    所述第一通信设备向所述第四通信设备发送停止传输信息，所述停止传输信息用于指示所述第四通信设备丢弃所述Ki个PDU中已经存储的PDU。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备接收所述第二通信设备发送的链路状态信息，所述链路状态信息用于指示所述第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况；
    所述第一通信设备根据所述链路状态信息调整分流策略。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备向所述第二通信设备发送所述第一通信设备的配置信息，所述第一通信设备的配置信息包含所述第一通信设备的能力信息和所述喷泉码的编码法则中的至少一项；
    其中，所述第一通信设备的能力信息用于指示所述第一通信设备支持喷泉码、所述第一通信设备支持的喷泉码类型、所述第一通信设备的最大编码长度中的至少一项；所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系。
  11. 根据权利要求1-10任一项所述的方法，其特征在于，
    所述Ki个PDU中第m个PDU包含所述第m个喷泉码码字的序号m、所述第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
  12. 一种数据传输方法，其特征在于，所述方法包括：
    第二通信设备接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数；
    所述第二通信设备根据所述Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数；
    所述第二通信设备将所述Ti个喷泉码码字进行喷泉码解码；
    当所述第二通信设备将所述Ti个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，所述第二通信设备向所述第一通信设备发送第一肯定应答信息，所述第一肯定应答信息用于指示所述第二通信设备已经正确接收所述 第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
  13. 根据权利要求12所述的方法，其特征在于，所述S个数据包的长度总和小于或等于预设窗口的长度，所述预设窗口用于指示所述第一通信设备发送的数据包为所述S个数据包中的第1个数据包至第S个数据包，所述方法还包括：
    所述第二通信设备接收所述第一通信设备发送的Ki+1个PDU，所述Ki+1个PDU由Ki+1个喷泉码码字生成，所述Ki+1个喷泉码码字由Ni+1个数据块生成，所述Ni+1个数据块组成所述S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数；
    所述第二通信设备根据所述Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数；
    所述第二通信设备将所述Ti+1个喷泉码码字进行喷泉码解码。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    所述第二通信设备向所述第一通信设备发送第二状态信息，所述第二状态信息用于指示所述第二通信设备正确接收所述S个数据包中第i+1个数据包的PDU的个数，以便所述第一通信设备根据所述第二状态信息调整发送所述第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
  15. 根据权利要求14所述的方法，其特征在于，所述第二通信设备向所述第一通信设备发送第二状态信息，包括：
    当所述第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，所述第二通信设备向所述第一通信设备发送所述第二状态信息。
  16. 根据权利要求12-15任一项所述的方法，其特征在于，所述第一通信设备与所述第二通信设备通过第四通信设备转发进行数据传输；
    所述第二通信设备向所述第一通信设备发送第一肯定应答信息之后，所述方法还包括：
    所述第二通信设备向所述第四通信设备发送停止传输信息，所述停止传输信息用于指示所述第四通信设备丢弃所述Ki个PDU中已经存储的PDU。
  17. 根据权利要求12-16任一项所述的方法，其特征在于，所述方法还包括：
    所述第二通信设备向所述第一通信设备发送链路状态信息，所述链路状态信息用于指示所述第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
  18. 根据权利要求12-17任一项所述的方法，其特征在于，所述方法还包括：
    所述第二通信设备接收所述第一通信设备发送的所述第一通信设备的配置信息，所述第一通信设备的配置信息包含所述第一通信设备的能力信息和所述喷泉码的编码法则中的至少一项；
    其中，所述第一通信设备的能力信息用于指示所述第一通信设备支持喷泉码、所述第一通信设备支持的喷泉码类型、所述第一通信设备的最大编码长度中的至少一项；所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系。
  19. 根据权利要求12-18任一项所述的方法，其特征在于，
    所述Ki个PDU中第m个PDU包含所述第m个喷泉码码字的序号m、所述第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
  20. 一种第一通信设备，其特征在于，包括：
    获取单元，用于获取S个数据包中的第i个数据包，S为正整数，i的取值为1到S中任意一个正整数；
    编码单元，用于将所述第i个数据包分为Ni个数据块，并将所述Ni个数据块进行喷泉码编码生成Ki个喷泉码码字，Ni为大于1的整数，Ki为大于1的整数；
    数据处理单元，用于根据所述Ki个喷泉码码字生成Ki个协议数据单元PDU，
    发送单元，用于向第二通信设备发送所述Ki个PDU；
    所述第一通信设备还包括接收单元，
    所述发送单元，还用于当所述接收单元接收到所述第二通信设备发送的第一肯定应答信息时，根据所述第一肯定应答信息停止向所述第二通信设备发送 所述Ki个PDU中待发送的PDU，所述第一肯定应答信息用于指示所述第二通信设备已经正确接收所述第i个数据包。
  21. 根据权利要求20所述的设备，其特征在于，所述S个数据包的长度总和小于或等于预设窗口的长度，所述预设窗口用于指示所述第一通信设备发送的数据包为所述S个数据包中的第1个数据包至第S个数据包，；
    所述编码单元，还用于将所述S个数据包中的第i+1个数据包分为Ni+1个数据块，并将所述Ni+1个数据块进行喷泉码编码生成Ki+1个喷泉码码字，Ni+1为大于1的整数，Ki+1为大于1的整数；
    所述数据处理单元，还用于根据所述Ki+1个喷泉码码字生成Ki+1个PDU；
    所述发送单元，还用于向所述第二通信设备发送所述Ki+1个PDU。
  22. 根据权利要求21所述的设备，其特征在于，
    所述数据处理单元，还用于在所述接收单元接收到所述第二通信设备发送的第一肯定应答信息之后，当i的取值为1时，将所述预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
  23. 根据权利要求21或22所述的设备，其特征在于，
    当所述Ki个PDU中所述第一通信设备向所述第二通信设备已经发送的PDU所占用的时长超过第一预设时长，或者所述Ki个PDU中，所述所述第一通信设备向所述第二通信设备已经发送的PDU个数超过预设数量时，
    所述获取单元，还用于丢弃所述第i个数据包；
    所述数据处理单元，还用于当i的取值为1时，将所述预设窗口所指示的数据包调整为第2个数据包至第S+1个数据包。
  24. 根据权利要求21-23任一项所述的设备，其特征在于，
    所述接收单元，还用于接收所述第二通信设备发送的第二状态信息，所述第二状态信息用于指示所述第二通信设备正确接收所述S个数据包中第i+1个数据包的PDU的个数；
    所述发送单元，还用于根据所述第二状态信息调整发送所述第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
  25. 根据权利要求24所述的设备，其特征在于，
    所述接收单元，还用于当所述第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，接收所述第二通信设备发送的所述第二状态信息。
  26. 根据权利要求20-25任一项所述的设备，其特征在于，
    所述发送单元，还用于向第三通信设备发送切换信息，所述切换信息用于指示所述第三通信设备向所述第二通信设备发送所述第i个数据包；所述切换信息包含所述第i个数据包的序号、所述喷泉码的编码法则、编码上下文中的至少一项，所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系，所述编码上下文用于指示已产生的编码数量、编码矩阵的状态等信息中的至少一项；
    所述发送单元，还用于将所述第i个数据包或所述Ki个PDU中待发送的PDU发送至所述第三通信设备。
  27. 根据权利要求20-26任一项所述的设备，其特征在于，所述第一通信设备与所述第二通信设备通过第四通信设备转发进行数据传输；
    所述发送单元，还用于向所述第四通信设备发送停止传输信息，所述停止传输信息用于指示所述第四通信设备丢弃所述Ki个PDU中已经存储的PDU。
  28. 根据权利要求20-27任一项所述的设备，其特征在于，
    所述接收单元，还用于接收所述第二通信设备发送的链路状态信息，所述链路状态信息用于指示所述第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况；
    所述发送单元，还用于根据所述接收单元接收到的所述链路状态信息调整分流策略。
  29. 根据权利要求20-28任一项所述的设备，其特征在于，
    所述发送单元，还用于向所述第二通信设备发送所述第一通信设备的配置信息，所述第一通信设备的配置信息包含所述第一通信设备的能力信息和所述 喷泉码的编码法则中的至少一项；
    其中，所述第一通信设备的能力信息用于指示所述第一通信设备支持喷泉码、所述第一通信设备支持的喷泉码类型、所述第一通信设备的最大编码长度中的至少一项；所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系。
  30. 根据权利要求20-29任一项所述的设备，其特征在于，
    所述Ki个PDU中第m个PDU包含所述第m个喷泉码码字的序号m、所述第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
  31. 一种第二通信设备，其特征在于，包括：
    接收单元，用于接收第一通信设备发送的Ki个协议数据单元PDU，Ki为大于1的整数；
    数据处理单元，用于根据所述Ki个PDU中接收到的Ti个PDU获取Ti个喷泉码码字，Ti为[1，Ki]内的任意一个整数；
    解码单元，用于将所述Ti个个喷泉码码字进行喷泉码解码；
    发送单元，用于当所述解码单元将所述Ti个个喷泉码码字进行喷泉码解码得到S个数据包中的第i个数据包时，向所述第一通信设备发送第一肯定应答信息，所述第一肯定应答信息用于指示所述第二通信设备已经正确接收所述第i个数据包，S为正整数，i的取值为1到S中任意一个正整数。
  32. 根据权利要求31所述的设备，其特征在于，
    所述S个数据包的长度总和小于或等于预设窗口的长度，所述预设窗口用于指示所述第一通信设备发送的数据包为所述S个数据包中的第1个数据包至第S个数据包；
    所述接收单元，还用于接收所述第一通信设备发送的Ki+1个PDU，所述Ki+1个PDU由Ki+1个喷泉码码字生成，所述Ki+1个喷泉码码字由Ni+1个数据块生成，所述Ni+1个数据块组成所述S个数据包中第i+1个数据包，Ni+1为大于1的整数，Ki+1为大于1的整数；
    所述数据处理单元，还用于根据所述Ki+1个PDU中接收到的Ti+1个PDU获取Ti+1个喷泉码码字，Ti+1为[1，Ki+1]内的整数；
    所述解码单元，还用于将所述Ti+1个喷泉码码字进行喷泉码解码。
  33. 根据权利要求32所述的设备，其特征在于，
    所述发送单元，还用于向所述第一通信设备发送第二状态信息，所述第二状态信息用于指示所述第二通信设备正确接收所述S个数据包中第i+1个数据包的PDU的个数，以便所述第一通信设备根据所述第二状态信息调整发送所述第i+1个数据包的PDU的发送数量和发送速率中的至少一项。
  34. 根据权利要求33所述的设备，其特征在于，
    所述发送单元，还用于当所述第二通信设备已经接收的PDU所占用的时长超过第二预设时长时，向所述第一通信设备发送所述第二状态信息。
  35. 根据权利要求31-34任一项所述的设备，其特征在于，所述第一通信设备与所述第二通信设备通过第四通信设备转发进行数据传输；
    所述发送单元，还用于向所述第四通信设备发送停止传输信息，所述停止传输信息用于指示所述第四通信设备丢弃所述Ki个PDU中已经存储的PDU。
  36. 根据权利要求31-35任一项所述的设备，其特征在于，
    所述发送单元，还用于向所述第一通信设备发送链路状态信息，所述链路状态信息用于指示所述第二通信设备在至少一个链路上接收到的PDU的数量或者预设时间段内的数据接收情况。
  37. 根据权利要求31-36任一项所述的设备，其特征在于，
    所述接收单元，还用于接收所述第一通信设备发送的所述第一通信设备的配置信息，所述第一通信设备的配置信息包含所述第一通信设备的能力信息和所述喷泉码的编码法则中的至少一项；
    其中，所述第一通信设备的能力信息用于指示所述第一通信设备支持喷泉码、所述第一通信设备支持的喷泉码类型、所述第一通信设备的最大编码长度中的至少一项；所述喷泉码的编码法则包含所述第i个数据包的长度、所述Ni 个数据块的个数Ni、编码矩阵中的至少一项，所述编码矩阵用于指示所述数据块与所述喷泉码码字之间的映射关系。
  38. 根据权利要求31-37任一项所述的设备，其特征在于，
    所述Ki个PDU中第m个PDU包含所述第m个喷泉码码字的序号m、所述第m个PDU中最后一个数据块的长度中的至少一项，m为1到Ki中任意一个正整数。
  39. 一种第一通信设备，其特征在于，所述第一通信设备包括：处理器、存储器、总线、发送器及接收器，所述处理器、所述存储器、所述发送器及所述接收器通过所述总线相互连接，所述存储器用于存储程序和数据，所述处理器用于调用所述存储器存储的程序执行如权利要求1-11中任一项所述方法。
  40. 一种第二通信设备，其特征在于，所述第一通信设备包括：处理器、存储器、总线、发送器及接收器，所述处理器、所述存储器、所述发送器及所述接收器通过所述总线相互连接，所述存储器用于存储程序和数据，所述处理器用于调用所述存储器存储的程序执行如权利要求12-19中任一项所述方法。
  41. 一种数据传输系统，其特征在于，包括：第一通信设备和第二通信设备；
    所述第一通信设备为权利要求20-30任一项所述的第一通信设备，所述第二通信设备为权利要求31-38任一项所述的第二通信设备；
    或者，所述第一通信设备为权利要求39所述的第一通信设备，所述第二通信设备为权利要求40所述的第二通信设备。
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