WO2016045062A1 - Dispositif, système et procédé de transmission de paquet de données - Google Patents

Dispositif, système et procédé de transmission de paquet de données Download PDF

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Publication number
WO2016045062A1
WO2016045062A1 PCT/CN2014/087452 CN2014087452W WO2016045062A1 WO 2016045062 A1 WO2016045062 A1 WO 2016045062A1 CN 2014087452 W CN2014087452 W CN 2014087452W WO 2016045062 A1 WO2016045062 A1 WO 2016045062A1
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Prior art keywords
data packets
group
data packet
data
packets
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PCT/CN2014/087452
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English (en)
Chinese (zh)
Inventor
王娟
朱松
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 CN201480026717.1A priority Critical patent/CN105684383A/zh
Priority to PCT/CN2014/087452 priority patent/WO2016045062A1/fr
Publication of WO2016045062A1 publication Critical patent/WO2016045062A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a device, system, and method for data packet transmission.
  • the Machine to Machine (M2M) system is a concept and a general term for all technologies that enhance the communication and networking capabilities of machine equipment. Many people communicate with each other through machines, such as communication between machines, such as mobile phones, telephones, computers, and fax machines. Another type of technology is designed to establish communication between machines and machines. For example, many intelligent instruments and meters have an interface for M2M communication, which enhances the communication between the instrument and the instrument and between the instrument and the computer. With the development of science and technology, more and more devices have the ability to communicate and connect, and everything on the network has gradually become a reality. Among them, the narrowband M2M system has a low data transmission rate and is sensitive to the terminal cost. Therefore, the terminal adopts a half-duplex frequency division duplex (FDD) method to meet the requirements.
  • FDD frequency division duplex
  • the terminal based on the half-duplex FDD mode also needs to adopt a certain retransmission mechanism to ensure the stability of data transmission.
  • the data packet transmission mechanism of the Hybrid Automatic Repeat Request (HARQ) is widely used in the prior art, and each process is independent of each other.
  • the requesting sender sends a retransmission.
  • the running time of the system when there are multiple (or several) processes on which the data packets are retransmitted multiple times, the transmission progress of the data packets on each process is inconsistent. Therefore, the receiving end cannot assemble the packets in time. Set a larger buffer space for storing packets without successful packet; in addition, in order to be able to group packets at the receiving end, the packets must carry their respective identifiers. Therefore, the complexity and cost of the solution implementation are greatly improved.
  • the present invention provides an apparatus, system and method for data packet transmission for reducing implementation complexity and cost.
  • a first aspect of the present invention provides an apparatus for data packet transmission, the apparatus being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • a sending module configured to send a set of data packets to the peer end, where the set of data packets includes n data packets; and is further configured to send the next group to the peer end when the set of data packets is successfully sent data pack;
  • a processing module configured to sequentially correspond to the n data packets to n processes, where n is a positive integer greater than or equal to two, and the n ⁇ maximum number of processes.
  • the method further includes:
  • a receiving module configured to receive a receiving response message sent by the peer end, where the receiving response message carries a receiving failure information of the data packet, and/or a receiving success information of the data packet;
  • the sending module is further configured to retransmit the data packet corresponding to the receiving failure information of the data packet if the receiving response message includes the receiving failure information of the data packet.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate re Transmitting m data packets, the m being a positive integer greater than zero, and m ⁇ n;
  • the sending module is specifically configured to retransmit the m data packets on the m processes according to the data packet retransmission indication; specifically, the m data packets are successfully sent, and then Sending the next set of data packets to the peer.
  • the processing module is further configured to: if the retransmission times of the at least one of the data packets exceed the preset maximum data packet size The number of retransmissions stops retransmission of at least one of the data packets.
  • the processing module is further configured to determine whether the number of retransmissions of the group of data packets exceeds a maximum number of retransmissions of the group ;
  • the sending module is further configured to retransmit the group of data packets if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group; or
  • the processing module is further configured to discard the set of data packets if the number of retransmissions of the set of data packets exceeds a maximum number of retransmissions of the group;
  • the sending module is further configured to send the next group of data packets to the peer end.
  • the receiving failure information of the data packet is a group retransmission indication, where the group retransmission indication is used to indicate that the a set of data packets for retransmission;
  • the processing module is further configured to determine whether the number of retransmissions of the group of data packets exceeds a maximum number of retransmissions of the group;
  • the sending module is further configured to: if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group, retransmit the group of data packets according to the group retransmission indication; or
  • the processing module is further configured to discard the set of data packets if the number of retransmissions of the set of data packets exceeds a maximum number of retransmissions of the group;
  • the sending module is further configured to send the next set of data packets to the opposite end; and is further configured to send the next set of data packets to the opposite end until the n data packets are successfully sent.
  • the data packet is an unsplit original data packet, and/or the The data packet is a sub-data packet obtained by splitting the original data packet;
  • the header of at least one of the sub-packets includes group package indication information
  • the group package indication information is used by the opposite end to receive at least two After the sub-data packet, grouping at least two of the sub-data packets according to the group packet indication information
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries an identifier, The identifier is used by the peer to identify the original data packet.
  • a second aspect of the present invention provides an apparatus for data packet transmission, the method being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • a receiving module configured to receive a set of data packets sent by the peer end, where the set of data packets includes n data packets, where the n data packets respectively correspond to n processes in sequence, and the n is greater than or equal to two a positive integer, and the n ⁇ maximum number of processes;
  • a processing module configured to: when the group of data packets is successfully received, instruct the receiving module to receive the next group of data packets sent by the peer end.
  • the method further includes:
  • a sending module configured to send a receiving response message to the peer end, where the receiving response message carries a receiving failure information of the data packet, and/or a receiving success information of the data packet;
  • the receiving module is further configured to: if the receiving response message includes a receiving failure information of the data packet, And receiving a data packet corresponding to the receiving failure information of the data packet retransmitted by the peer end.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate The opposite end retransmits m data packets, where m is a positive integer greater than zero, and m ⁇ n;
  • the receiving module is specifically configured to receive, by the m processes, the m data packets that are retransmitted by the peer end, and specifically, to receive the data packets until the m data packets are successfully received, and then receive the pair. The next set of packets sent by the end.
  • the method further includes:
  • the receiving failure information of the data packet is a group retransmission indication, and the group retransmission indication is used to instruct the peer to retransmit the group of data packets.
  • the data packet is an unsplit original data packet, and/or the The data packet is a sub-data packet obtained by splitting the original data packet;
  • the processing module is further configured to: Two of the sub-packets are grouped; or,
  • the processing module is further configured to identify the original data packet according to the identifier.
  • a third aspect of the present invention provides an apparatus for data packet transmission, the apparatus being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • a transmitter configured to send a set of data packets to the peer end, where the set of data packets includes n data packets; and is further configured to send the next group to the peer end when the set of data packets is successfully sent data pack;
  • a processor configured to sequentially correspond to the n data packets to n processes, where n is a positive integer greater than or equal to two, and the n ⁇ maximum number of processes.
  • the method further includes:
  • a receiver configured to receive a receiving response message sent by the peer end, where the receiving response message carries a receiving failure information of the data packet, and/or a receiving success information of the data packet;
  • the transmitter is further configured to: if the receiving response message includes a receiving failure information of the data packet, Then, the data packet corresponding to the reception failure information of the data packet is retransmitted.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate re Transmitting m data packets, the m being a positive integer greater than zero, and m ⁇ n;
  • the transmitter is specifically configured to retransmit the m data packets on the m processes according to the data packet retransmission indication; specifically, the m data packets are successfully sent, and then Sending the next set of data packets to the peer.
  • the processor is further configured to: if the retransmission times of the at least one of the data packets exceed the preset maximum data packet size The number of retransmissions stops retransmission of at least one of the data packets.
  • the processor is further configured to determine whether the number of retransmissions of the group of data packets exceeds a maximum number of retransmissions of the group ;
  • the transmitter is further configured to retransmit the group of data packets if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group; or
  • the processor is further configured to discard the set of data packets if the number of retransmissions of the set of data packets exceeds a maximum number of retransmissions of the group;
  • the transmitter is further configured to send the next group of data packets to the peer end.
  • the receiving failure information of the data packet is a group retransmission indication, where the group retransmission indication is used to indicate that the a set of data packets for retransmission;
  • the processor is further configured to determine whether the number of retransmissions of the group of data packets exceeds a maximum number of retransmissions of the group;
  • the transmitter is further configured to: if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group, retransmit the group of data packets according to the group retransmission indication; or
  • the processor is further configured to discard the set of data packets if the number of retransmissions of the set of data packets exceeds a maximum number of retransmissions of the group;
  • the transmitter is further configured to send the next set of data packets to the opposite end; and is further configured to send the next set of data packets to the opposite end until the n data packets are successfully sent.
  • the data packet is an unsplit original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet;
  • the header of at least one of the sub-packets includes group package indication information
  • the group package indication information is used by the opposite end to receive at least two After the sub-data packet, grouping at least two of the sub-data packets according to the group packet indication information
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries an identifier, The identifier is used by the peer to identify the original data packet.
  • a fourth aspect of the present invention provides an apparatus for data packet transmission, the method being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • a receiver configured to receive a set of data packets sent by the peer end, where the set of data packets includes n data packets, where the n data packets respectively correspond to n processes in sequence, and the n is greater than or equal to two a positive integer, and the n ⁇ maximum number of processes;
  • a processor configured to: when the group of data packets is successfully received, instruct the receiver to receive the next group of data packets sent by the peer end.
  • the method further includes:
  • a transmitter configured to send a receiving response message to the peer end, where the receiving response message carries a receiving failure information of the data packet, and/or a receiving success information of the data packet;
  • the receiver is further configured to: if the receiving response message includes the receiving failure information of the data packet, receive the data packet corresponding to the receiving failure information of the data packet retransmitted by the opposite end.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate The opposite end retransmits m data packets, where m is a positive integer greater than zero, and m ⁇ n;
  • the receiver is specifically configured to receive, by the m processes, the m data packets that are retransmitted by the peer end, and specifically, to receive the data packets until the m data packets are successfully received, and then receive the pair. The next set of packets sent by the end.
  • the method further includes:
  • the receiving failure information of the data packet is a group retransmission.
  • the group retransmission indication is used to instruct the peer to retransmit the set of data packets.
  • the data packet is an unsplit original data packet, and/or the The data packet is a sub-data packet obtained by splitting the original data packet;
  • the processor is further configured to receive, by the peer, at least two After the sub-data packet, grouping at least two of the sub-data packets according to the group packet indication information;
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries an identifier
  • the processor is further configured to identify the original data packet according to the identifier.
  • a fifth aspect of the present invention provides a packet transmission system, comprising: at least one apparatus of the packet transmission and at least one second of any one of the foregoing possible implementation manners of the first aspect or the first aspect
  • the apparatus of the data packet transmission of any one of the foregoing possible implementations of the second aspect, or the data of any one of the foregoing possible implementation manners of the third aspect or the third aspect Apparatus for packet transmission and apparatus for data packet transmission according to at least one of the fourth aspect or any one of the above possible implementations of the fourth aspect.
  • a sixth aspect of the present invention provides a method of data packet transmission, the method being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • the method before the sending of the next set of data packets to the opposite end, when the sending of the set of data packets is successful, the method further includes:
  • the method further includes:
  • the receiving response message includes the receiving failure information of the data packet, retransmitting the data packet corresponding to the receiving failure information of the data packet.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate re Transmitting m data packets, the m being a positive integer greater than zero, and m ⁇ n;
  • sending the next set of data packets to the peer end including:
  • the m data packets are respectively performed on m processes according to the data packet retransmission indication Before retransmission, it also includes:
  • the method further includes:
  • the set of data packets is discarded, and the next set of data packets is sent to the opposite end.
  • the receiving failure information of the data packet is a group retransmission indication, where the group retransmission indication is used to indicate that the a set of data packets for retransmission;
  • sending the next set of data packets to the peer end including:
  • the data packet is an unsplit original data packet, and/or The data packet is a sub-data packet obtained by splitting the original data packet;
  • the header of at least one of the sub-packets includes group package indication information
  • the group package indication information is used by the opposite end to receive at least two After the sub-data packet, grouping at least two of the sub-data packets according to the group packet indication information
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries an identifier, The identifier is used by the peer to identify the original data packet.
  • a seventh aspect of the present invention provides a method of data packet transmission, the method being applied to a half-duplex frequency division duplex machine-to-machine system, comprising:
  • the set of data packets includes n data packets, where the n data packets are respectively corresponding to n processes in sequence, and the n is a positive integer greater than or equal to two, and The n ⁇ the maximum number of processes;
  • the method before receiving the next set of data packets sent by the peer end, when the receiving of the set of data packets is successful, the method further includes:
  • the receiving response message carries the receiving failure information of the data packet, and/or the receiving success information of the data packet;
  • the method further includes:
  • the receiving response message includes the receiving failure information of the data packet, receiving the data packet corresponding to the receiving failure information of the data packet retransmitted by the opposite end.
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate The opposite end retransmits m data packets, where m is a positive integer greater than zero, and m ⁇ n;
  • Receiving, by the peer, the data packet corresponding to the reception failure information of the data packet retransmitted by the peer end include:
  • the method further includes:
  • the receiving failure information of the data packet is a group retransmission indication, and the group retransmission indication is used to instruct the peer to retransmit the group of data packets.
  • the data packet is an unsplit original data packet, and/or the The data packet is a sub-data packet obtained by splitting the original data packet;
  • the header of at least one of the sub-packets includes packet indication information, and after receiving at least two of the sub-packets, according to the group of packets Instructing to group at least two of the sub-packets; or
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries an identifier, Identifying the original data packet based on the identification.
  • a device for transmitting a data packet transmits a set of data packets to a peer end, where the set of data packets includes n data packets, and the n data packets are sent.
  • the time corresponds to n processes in sequence, the n is a positive integer greater than or equal to two, and the n is the maximum number of processes, and further, when the set of data packets is successfully transmitted, the device for transmitting the data packet The next set of data packets is sent to the opposite end.
  • a multi-process data transmission scheme is adopted, data packets are respectively transmitted on a corresponding process, and multiple processes are interleaved with each other, that is, when one process is waiting for the receiving end to return a receiving response message, the other The process is still able to transfer packets.
  • the system needs to have a complex sorting function. In order to be able to assemble and identify at the receiving end, the system needs a complex unpacking package.
  • the sender needs to maintain a large cache to store packets that have not been sent successfully or need to be retransmitted, and the receiver needs to maintain a large cache to store unsuccessful success, not grouped. A successful packet of packets.
  • the prior art adopts a multi-process approach, which increases the cost and complexity of system implementation.
  • the embodiment of the present invention ensures that only after a group of data packets is successfully transmitted, the next group of data packets is transmitted, so that the sender only needs to cache a group of data packets at most.
  • the receiving end only needs to cache a maximum of one group of data packets or packets that are not successfully packaged (when a group packet is required), thereby saving resources.
  • the next group of data packets is transmitted. In this way, the transmission progress of each data packet is different due to the continuous transmission of the data packet, and the complex identification, grouping, and retransmission mechanism needs to be set. Therefore, the method for transmitting the data packet provided by the embodiment of the present invention is reduced. The cost and complexity of the solution implementation when the half-duplex FDD is transmitted.
  • FIG. 1 is a schematic structural diagram of an apparatus for transmitting a data packet according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another apparatus for data packet transmission according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another apparatus for data packet transmission according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of another apparatus for data packet transmission according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another apparatus for transmitting data in a wireless network according to an embodiment of the present invention.
  • FIG. 6 is a block diagram showing a part of a structure of a mobile phone related to a device for transmitting data in a wireless network according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for data packet transmission according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart of another method for data packet transmission according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a method for retransmitting a data packet according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another method for retransmitting a data packet according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart diagram of another method for data packet transmission according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic flowchart diagram of another method for data packet transmission according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of interaction of another method for data packet transmission according to an embodiment of the present invention.
  • the terminal of the M2M system adopts the half-duplex FDD transmission mode
  • the prior art adopts a multi-process transmission data scheme
  • the data packets are respectively transmitted on a corresponding process, and the multiple processes are independent and interleaved. That is, when a certain process is waiting for the receiving end to return a receiving response message, the other processes can still transmit the data packet.
  • the transmission progress of each data packet is different.
  • the system needs to have the function of reordering, and the complexity of the grouping mechanism is high.
  • the receiver also needs to maintain a large cache to store packets that are not successfully packaged or are waiting to be retransmitted.
  • adopting a multi-process approach will increase the cost and complexity of system implementation.
  • the prior art also provides a single-process transmission mode, that is, the transmitting end waits for the receiving end to receive a response message after transmitting a data packet, and when the data packet is correctly decoded at the receiving end, the returned receiving response message includes the confirmation information.
  • ACK indicating that the data packet is successfully received by the transmitting end; otherwise, the returned receiving response message includes non-acknowledgement information (NACK), indicating that the data packet is not received by the transmitting end, and the transmitting end receives the non-acknowledgment information, then the data is received.
  • the package is retransmitted. And the transmitting end cannot send other data packets while the transmitting end waits for the receiving end to confirm.
  • the single-process transmission mode if the single-process transmission mode is used, if a packet is sent out as a whole, when the reception fails, the entire large data packet needs to be retransmitted, thereby causing waste of resources and reducing efficiency.
  • the embodiments of the present invention provide a device, a method, and a system for data packet transmission, which can reduce the cost of implementing the solution while ensuring transmission efficiency and system throughput. the complexity.
  • the apparatus is applied to a half-duplex FDD machine-to-machine system, and the apparatus is used as a transmitting end of a data packet.
  • the apparatus may be Base station, machine, water meter with electricity function, meter reading, mobile phone, communication device supporting various communication systems (2G/3G/4G/5G/wifi/Bluetooth, etc.), M2M terminal, refer to FIG.
  • the processing module 100 includes a processing module 100.
  • the sending module 101 is configured to send a set of data packets to the peer end, where the set of data packets includes n data packets, and is further configured to send the next data to the opposite end when the set of data packets is successfully sent.
  • Group data packet
  • the processing module 100 is configured to sequentially sequence the n data packets corresponding to n processes, where n is a positive integer greater than or equal to two, and the n ⁇ maximum number of processes.
  • the device for transmitting a data packet provided by the embodiment of the present invention sends a set of data packets to the opposite end by the sending module, where the set of data packets includes n data packets, and the processing module sequentially sends the n data packets when transmitting.
  • the n is a positive integer greater than or equal to two, and the n ⁇ the maximum number of processes.
  • the sending module sends the next set of data packets to the opposite end when the set of data packets is successfully sent.
  • the embodiment of the present invention ensures that only after a group of data packets is successfully transmitted, the next group of data packets is transmitted, and the transmitting end only needs to cache a group of data packets at the receiving end. It is also only necessary to cache a maximum of one group of packets or a packet that is not successfully packaged (when a package is required), thereby saving resources, and further, a method of transmitting a next set of data packets after a successful transmission of a set of data packets is performed.
  • the transmission progress of each data packet is different due to the continuous transmission of data packets, so that a complex identification, grouping, and retransmission mechanism needs to be set.
  • the device for transmitting data packets provided by the embodiments of the present invention ensures transmission efficiency and system throughput. At the same time, it can reduce the cost and complexity of the solution implementation.
  • the embodiment of the present invention can send a group of data packets each time, can quickly send data packets, save terminal power consumption, and improve throughput of data packet transmission.
  • the device for transmitting the data packet cancels the Radio Link Control (RLC) layer and media access.
  • the Medium Access Control (MAC) layer supports simple unpacking and grouping functions. The MAC layer will need to be removed according to the real-time situation of the channel.
  • the divided data packets are split into data packets of appropriate size, and the data packets of the MAC layer may be original data packets or sub-data packets. In a group of data packets, the data packet is an unpacked original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet.
  • a group of data packets including the type of the data packet may have the following possibilities: 1. A group of data packets only includes multiple sub-data packets obtained by splitting the original data packet; 2. A group of data packets includes all of the data packets. Split original data packet; Third, a group of data packets contains multiple sub-packets obtained by splitting the original data packet and unpacked original data packets.
  • the processing module 100 may tear down the original data packet.
  • the method is divided into a plurality of sub-packets.
  • the size of the threshold is not limited in this embodiment.
  • the threshold may be set according to system requirements in different scenarios.
  • the header of at least one of the sub-packets includes group package indication information, where the group package indication information is used by the peer end After receiving at least two of the sub-data packets, grouping at least two of the sub-data packets according to the group package indication information;
  • a group of data packets includes multiple sub-data packets obtained by splitting the original data packet
  • the sub-packet is grouped.
  • a possible implementation manner is that the last sub-packet belonging to the original data packet should include an indication that the sub-packet is the last data packet.
  • each group of data packets may not carry the above-mentioned indication information.
  • each group of data packets transmitted by the preset transmitting end and the receiving end only includes a plurality of sub-data packets obtained by splitting one original data packet, and after receiving the data packet, the receiving end groups the data packet. Just fine.
  • each type of the data packet corresponds to a transmission mode
  • each group of data packets only includes one by splitting the original
  • the plurality of sub-packets obtained by the data packet adopt a specific transmission mode
  • the transmitting end notifies the receiving end
  • each group of data packets transmitted thereafter only includes a plurality of sub-packets obtained by splitting one original data packet, and then the group data is The packet does not need to carry the indication information, and after receiving the group of data packets, the receiving end can group the group of data packets.
  • the header of at least one of the sub-data packets includes the group package indication information, and each of the original The data packet carries an identifier for the peer to identify the original data packet.
  • each sub-packet carries a 1 bit (0/1) indication, 1 indicates the last sub-packet or the unsplit original data packet, and 0 indicates the non-last sub-packet; for example, sending The end splits an original data packet into five sub-packets, which also include two other unsplit original data packets, for a total of seven data packets.
  • the packet indication information carried by the first to fourth sub-packets is “0”, and the packet indication information carried by the last sub-packet is “1”.
  • the packet indication information carried by the packet is "1".
  • the packet indication information carried by the packet is "1".
  • FIG. 2 is a schematic structural diagram of another apparatus for data packet transmission according to an embodiment of the present invention.
  • the apparatus further includes: a receiving module 102.
  • the receiving module 102 is configured to receive the receiving response message sent by the opposite end, where the receiving response message carries the receiving failure information of the data packet, and/ Or the success message of receiving the data packet;
  • the sending module 101 is further configured to: if the receiving response message includes receiving failure information of the data packet, retransmitting the data packet corresponding to the receiving failure information of the data packet.
  • the apparatus for transmitting a data packet provided by the embodiment of the present invention
  • a retransmission mechanism needs to be introduced to ensure the reliability of the data packet transmission.
  • the packet retransmission mechanism of the apparatus for data packet transmission according to the embodiment of the present invention is described below by using a specific embodiment. It should be noted that the following embodiments of the present invention are only implemented by using several possible implementation manners as an example. It is to be understood that it does not limit the scope of protection of the present invention. Based on the method for data packet transmission provided by the embodiments of the present invention, other possible data packet retransmission mechanisms should also fall within the protection scope of the present invention.
  • the receiving end sends the receiving failure information of the data packet to the receiving module 102 of the sending end, and the function is to notify the sending end which data packet transmission fails, and further, the data packet
  • the receive failure information can be used to indicate a group of packet transmission failures, and can also be used to indicate that one or more packets in a group of packets failed to transmit. The following two possible scenarios are illustrated by specific embodiments:
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate retransmission of the m data packets, where m is a positive integer greater than zero, and m ⁇ n;
  • the sending module 101 is specifically configured to retransmit the m data packets on the m processes according to the data packet retransmission indication; specifically, the m data packets are successfully sent until the m packets are successfully sent. And sending the next set of data packets to the opposite end.
  • processing module 100 is further configured to stop retransmission of at least one of the data packets if the number of retransmissions of the at least one data packet exceeds a preset maximum number of retransmissions of the data packet.
  • the processing module 100 is further configured to determine the group. Whether the number of retransmissions of the packet exceeds the maximum number of retransmissions of the group;
  • the sending module 101 is further configured to retransmit the group of data packets if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group; or
  • the processing module 100 is further configured to discard the set of data packets if the number of retransmissions of the set of data packets exceeds the maximum number of retransmissions of the group;
  • the sending module 101 is further configured to send the next group of data packets to the peer end.
  • Case 2 the receiving failure information of the data packet is a group retransmission indication, and the group retransmission indication is used to indicate that the group of data packets is retransmitted;
  • the processing module 100 is further configured to determine whether the number of retransmissions of the group of data packets exceeds a maximum number of retransmissions of the group;
  • the sending module 101 is further configured to: if the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group, retransmit the group of data packets according to the group retransmission indication; or
  • the processing module 100 is further configured to: if the number of retransmissions of the set of data packets exceeds the maximum of the group If the number of retransmissions is large, the set of data packets is discarded;
  • the sending module 101 is further configured to send the next set of data packets to the opposite end; and is further configured to send the next set of data packets to the opposite end until the n data packets are successfully sent.
  • the receiving failure information of the data packet also indicates that one or more data packet retransmission failures of the m retransmitted data packets fails, and the sending module 101 of the transmitting end performs retransmission according to the receiving failure information of the data packet.
  • the processing module 100 or the receiving end of the sending end may set the maximum number of retransmissions of the data packet and the maximum number of retransmissions of the group, and maintain the number of retransmissions of each data packet and the number of retransmissions of each group of data packets, when one Before the data packet is retransmitted, the number of retransmissions of the current data packet is compared with the maximum number of retransmissions of the data packet. If the maximum number of retransmissions of the data packet is not exceeded, the sending module 101 is allowed to retransmit the data packet, and After the retransmission, the processing module 100 adds "1" to the number of retransmissions of the data packet.
  • the processing module 100 abandons retransmission of the data packet; 2.
  • the processing module 100 further determines the current data of a group of data packets to which the data packet belongs. Whether the number of group retransmissions exceeds the maximum number of retransmissions in the group. For the second processing mode, if the maximum number of retransmissions of the group is not exceeded, the sending module 101 of the transmitting end retransmits the group of data packets; or, if the maximum number of retransmissions of the group is exceeded, the processing module 100 discards the group of data packets. And instructing the sending module 101 to send the next set of data packets.
  • the processing module 100 or the receiving end of the sending end maintains a timer for each data packet, and maintains a timer for each group of data packets.
  • the sending end when the sending module 101 sends a set of data packets, For each data packet in the group of data packets, the processing module 100 at the transmitting end respectively maintains a timer, and the timer functions to time the transmission time of each data packet, and each data packet in the transmission time.
  • the number of retransmissions is not limited. When the transmission time of the data packet exceeds the upper limit of the transmission time preset by the corresponding timer, the transmission of the data packet is abandoned.
  • the processing module 100 of the transmitting end can also maintain a timer for a group of data packets, and the timer is used to time the transmission time of a group of data packets, and the retransmission of the group of data packets during the transmission time.
  • the timer is used to time the transmission time of a group of data packets, and the retransmission of the group of data packets during the transmission time.
  • it is not limited.
  • the transmission time of the group of data packets exceeds the upper limit of the transmission time preset by the corresponding timer, the transmission of the group of data packets is abandoned, and the transmission of the next group of data packets is performed.
  • the receiver can maintain a similar timer, for each packet and the transmission time of each group of packets. Row timing, which abandons transmission after a packet or group of packets exceeds a predetermined transmission time.
  • the receiving end performs the transmission time counting by the timer, when a data packet or a group of data packets is discarded, the receiving response message fed back to the transmitting end does not carry the receiving failure information of the data packet, so that The sender does not retransmit the corresponding data packet or a group of data packets.
  • the data packet retransmission mechanism ensures that when one or several data packets in a group of data packets fail to be received, by setting a data packet retransmission and a group of data packets to retransmit two retransmission mechanisms.
  • the processing module 100 of the sending end instructs the sending module 101 to retransmit one or several data packets that failed to be transmitted according to the receiving response message fed back by the receiving end; or, retransmit a group of data packets.
  • a group of data packets may include several sub-packets obtained by splitting one original data packet, and when the sub-data packet fails to be received, the transmitting end only retransmits and transmits.
  • the packet retransmission mechanism provided by the embodiment of the present invention saves the resources occupied by the transmission and improves the transmission efficiency, compared with the prior art that uses the single-process transmission.
  • FIG. 3 is a schematic structural diagram of another apparatus for transmitting a data packet according to an embodiment of the present disclosure.
  • the apparatus is applied to a half-duplex FDD machine-to-machine system, and the apparatus is used as a receiving end of a data packet.
  • the apparatus may be For base station, machine, water meter, electric meter with communication function, mobile phone, communication device supporting various communication systems (2G/3G/4G/5G/wifi/Bluetooth, etc.), M2M terminal, refer to Figure 1,
  • the device includes: a receiving module 202 and a processing module 200.
  • the receiving module 202 is configured to receive a set of data packets sent by the peer end, where the set of data packets includes n data packets, where the n data packets are respectively corresponding to n processes in sequence, and the n is greater than or equal to a positive integer of two, and the n ⁇ maximum number of processes;
  • the processing module 200 is configured to, when the group of data packets is successfully received, instruct the receiving module 202 to receive the next group of data packets sent by the peer end.
  • the apparatus for transmitting data packets receives a set of data packets sent by the opposite end by the receiving module, where the set of data packets includes n data packets, and the n data packets are respectively corresponding to n in sequence.
  • the n is a positive integer greater than or equal to two, and the n ⁇ the maximum number of processes, the processing module, when the group of data packets is successfully received, instructing the receiving module to receive the next A set of data packets.
  • the embodiment of the present invention ensures that only after a group of data packets is successfully transmitted, the next group of data packets is received, so that the device only needs to cache the most before receiving successfully.
  • the packet transmission device reduces the cost and complexity of the solution implementation when using a half-duplex FDD transmission mode.
  • the embodiment of the present invention can receive a group of data packets each time, can quickly receive data packets, save terminal power consumption, and improve throughput of data packet transmission.
  • the data packet received by the receiving module 202 in this embodiment may be an unsplit original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet.
  • the splitting of data packets and the composition of a set of data packets the above has been described in detail, and will not be described here.
  • FIG. 4 is a schematic structural diagram of another apparatus for transmitting a data packet according to an embodiment of the present invention.
  • the apparatus further includes: sending Module 201.
  • the sending module 201 is configured to send a receiving response message to the peer end, where the receiving response message carries the receiving failure information of the data packet, and/or the receiving success information of the data packet;
  • the receiving module 202 is further configured to: if the receiving response message includes the receiving failure information of the data packet, receive the data packet corresponding to the receiving failure information of the data packet retransmitted by the opposite end.
  • the sending module 201 of the receiving end sends the receiving failure information of the data packet to the sending end, so as to inform the transmitting end which data packet transmission fails, and further, the data packet
  • the receive failure information can be used to indicate a group of packet transmission failures, and can also be used to indicate that one or more packets in a group of packets failed to transmit. The following two possible scenarios are illustrated by specific embodiments:
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to instruct the peer end to retransmit the m data packets, where m is a positive integer greater than zero And m ⁇ n;
  • the receiving module 202 is specifically configured to receive, by using m processes, the m data packets that are retransmitted by the peer end, and specifically, for receiving, by the m, the data packets are successfully received, and then receiving the The next set of data packets sent by the peer.
  • the receiving failure information of the data packet is a group retransmission indication
  • the group retransmission indication is used to instruct the peer to retransmit the set of data packets.
  • the function is: when the group of data packets fails to receive, or the group packet fails, the group retransmission indication is used to cause the sender to retransmit the group of data packets.
  • the processing module 200 as a device at the receiving end can set a timer, maintain a timer for each data packet, and maintain a timer for each group of data packets, thereby realizing the transmission time for each data packet and each group of data packets. Timing is performed to abandon the transmission after a packet or group of packets exceeds the predetermined transmission time.
  • the receiving end performs the transmission time counting by the timer, when a data packet or a group of data packets is discarded, the receiving response message fed back by the sending module 201 to the transmitting end does not carry the receiving failure information of the data packet. So that the sender does not retransmit the corresponding data packet or a group of data packets.
  • the data packet retransmission mechanism ensures that when one or several data packets in a group of data packets fail to be received, by setting a data packet retransmission and a group of data packets to retransmit two retransmission mechanisms.
  • the sending module 201 at the receiving end feeds back the receiving response message to the transmitting end, so that the transmitting end retransmits one or several data packets that failed to be transmitted; or, retransmits a group of data packets.
  • a group of data packets may include several sub-packets obtained by splitting one original data packet, and when the sub-data packet fails to be received, the transmitting end only retransmits and transmits.
  • the packet retransmission mechanism provided by the embodiment of the present invention saves the resources occupied by the transmission and improves the transmission efficiency, compared with the prior art that uses the single-process transmission.
  • the data packet is an unsplit original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet;
  • the packet header of the at least one of the sub-packets includes packet indication information, where the packet indication information is used by the peer end, if the group of data packets transmitted by the source device includes at least two sub-packets.
  • the processing module 200 is further configured to group at least two of the sub-data packets according to the group package indication information;
  • each group of data packets may not carry the above-mentioned indication information.
  • each group of data packets transmitted by the preset transmitting end and the receiving end only includes a plurality of sub-data packets obtained by splitting one original data packet, and the processing module 200 at the receiving end receives the group data packet and then sets the data.
  • Package group Pack it.
  • each type of the data packet corresponds to a transmission mode
  • each group of data packets only includes one by splitting the original
  • the plurality of sub-packets obtained by the data packet adopt a specific transmission mode
  • the transmitting end notifies the receiving end
  • each group of data packets transmitted thereafter only includes a plurality of sub-packets obtained by splitting one original data packet, and then the group data is
  • the packet does not need to carry the indication information
  • the receiving end processing module 200 can group the group of data packets after receiving the group of data packets.
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original The data packet carries the identifier, and the processing module 200 is further configured to identify the original data packet according to the identifier.
  • FIG. 5 is a device for transmitting data in another wireless network according to an embodiment of the present invention.
  • the device may be used as a device for transmitting data packets at a transmitting end, or as a device for transmitting data packets at a receiving end, where the device includes : processor 300, transmitter 301, receiver 302;
  • the processor 300 corresponds to the processing module 100 in FIG. 1 or FIG. 2, and can perform corresponding functions of the processing module 100 in FIG. 1 or FIG. 2 to implement Corresponding technical effects;
  • the transmitter 301 corresponds to the transmitting module 101 in FIG. 1 or FIG. 2, and can perform the corresponding functions of the transmitting module 101 in FIG. 1 or FIG. 2 to implement corresponding technical effects;
  • the receiving module 102 corresponds to the corresponding function of the receiving module 102 in FIG. 4, and implements corresponding technical effects;
  • the processor 300 corresponds to the processing module 200 in FIG. 3 or FIG. 4, and can perform corresponding functions of the processing module 200 in FIG. 3 or FIG. 4 to implement a corresponding technology.
  • the receiver 302 corresponds to the receiving module 202 in FIG. 3 or FIG. 4, and can perform the corresponding functions of the receiving module 202 in FIG. 3 or FIG. 4 to implement the corresponding technical effects; the transmitter 301 and the sending in FIG.
  • the module 201 corresponds to and can perform the corresponding functions of the sending module 201 in FIG. 4 to achieve the corresponding technical effects.
  • the apparatus for transmitting a packet as a transmitting end as described above, or the apparatus for transmitting a packet at the receiving end will be described below by way of a specific example.
  • the terminal may be a terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, and the terminal is a mobile phone as an example, and FIG. 6 is an implementation of the present invention.
  • Example of a device for transmitting data in a wireless network A block diagram of the partial structure of the phone.
  • the mobile phone 500 includes a radio frequency (RF) circuit 510, a memory 520, an input unit 530, a display unit 540, a sensor 550, an audio circuit 560, a WiFi (wireless fidelity) module 570, and a processor. 580, and power supply 590 and other components.
  • RF radio frequency
  • FIG. 6 is only an example of implementation, and does not constitute a limitation on the mobile phone, and may include more or less components than those illustrated, or combine some components, or Different parts are arranged.
  • the components of the mobile phone 500 will be specifically described below with reference to FIG. 6:
  • the RF circuit 510 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, it is processed by the processor 580. In addition, the uplink data is designed to be sent to the base station.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, an LNA (Low Noise Amplifier), a duplexer, and the like.
  • RF circuitry 510 can also communicate with the network and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access). , Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), e-mail, SMS (Short Messaging Service), and the like.
  • the memory 520 can be used to store software programs and modules, and the processor 580 executes various functional applications and data processing of the mobile phone 500 by running software programs and modules stored in the memory 520.
  • the memory 520 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to The data created by the use of the mobile phone 500 (such as audio data, phone book, etc.) and the like.
  • memory 520 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 530 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the handset 500.
  • the input unit 530 may include a touch panel 531 and other input devices 532.
  • the touch panel 531 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using any suitable object such as a finger, a stylus, etc.) Or the operation of the accessory on or near the touch panel 531, and driving the corresponding connecting device according to a preset program.
  • the touch panel 531 can include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 580 is provided and can receive commands from the processor 580 and execute them.
  • the touch panel 531 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 530 may also include other input devices 532. Specifically, other input devices 532 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 540 can be used to display information input by the user or information provided to the user and various menus of the mobile phone 500.
  • the display unit 540 can include a display panel 541.
  • the display panel 541 can be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like.
  • the touch panel 531 can cover the display panel 541. When the touch panel 531 detects a touch operation on or near it, the touch panel 531 transmits to the processor 580 to determine the type of the touch event, and then the processor 580 according to the touch event. The type provides a corresponding visual output on display panel 541.
  • touch panel 531 and the display panel 541 are used as two independent components to implement the input and input functions of the mobile phone 500 in FIG. 6, in some embodiments, the touch panel 531 can be integrated with the display panel 541. The input and output functions of the mobile phone 500 are implemented.
  • the handset 500 can also include at least one type of sensor 550, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 541 according to the brightness of the ambient light, and the proximity sensor may close the display panel 541 when the mobile phone 500 moves to the ear. / or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.
  • the mobile phone 500 can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, here Let me repeat.
  • the audio circuit 560, the speaker 561, and the microphone 562 can provide a sound between the user and the mobile phone 500. Frequency interface.
  • the audio circuit 560 can transmit the converted electrical data of the received audio data to the speaker 561, and convert it into a sound signal output by the speaker 561.
  • the microphone 562 converts the collected sound signal into an electrical signal, and the audio circuit 560 is used by the audio circuit 560. After receiving, it is converted into audio data, and then processed by the audio data output processor 580, sent to the other mobile phone via the RF circuit 510, or outputted to the memory 520 for further processing.
  • WiFi is a short-range wireless transmission technology
  • the mobile phone 500 can help users to send and receive emails, browse web pages, and access streaming media through the WiFi module 570, which provides wireless broadband Internet access for users.
  • FIG. 6 shows the WiFi module 570, it can be understood that it does not belong to the essential configuration of the mobile phone 500, and may be omitted as needed within the scope of not changing the essence of the invention.
  • Processor 580 is the control center of handset 500, which connects various portions of the entire handset using various interfaces and lines, by running or executing software programs and/or modules stored in memory 520, and recalling data stored in memory 520, The various functions and processing data of the mobile phone 500 are performed to perform overall monitoring of the mobile phone.
  • the processor 580 may include one or more processing units; preferably, the processor 580 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 580.
  • the handset 500 also includes a power source 590 (such as a battery) that supplies power to the various components.
  • a power source 590 such as a battery
  • the power source can be logically coupled to the processor 580 via a power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the mobile phone 500 may further include a camera, a Bluetooth module, and the like, and details are not described herein again.
  • the processor included in the terminal when the terminal transmits the data packet as the transmitting end, the processor included in the terminal has the corresponding function of the processing module 100 shown in FIG. 1 or FIG. 2 above, and the RF circuit has the above FIG. Or the corresponding functions of the sending module 101 and the receiving module 102 shown in FIG. 2, and can achieve the corresponding technical effects; or, the processor has the corresponding function of the processor shown in FIG. 5 above, and the RF circuit has the above FIG.
  • the corresponding functions of the transmitter and receiver are shown, and the corresponding technical effects can be achieved;
  • the processor included in the terminal has the corresponding function of the processing module 200 shown in FIG. 3 or FIG. 4 above, and the RF circuit has the sending module shown in FIG. 3 or FIG. 4 above. 201 and the corresponding function of the receiving module 202, and can achieve the corresponding technical effects;
  • the processor has the corresponding function of the processor shown in FIG. 5 above, and the RF circuit has the corresponding functions of the transmitter and the receiver shown in FIG. 5 above, and can achieve corresponding technical effects.
  • the device for data packet transmission can also be an IoT device such as a smart meter or a smart water meter.
  • a smart meter a possible implementation manner is: a power system data collected by a cluster smart meter through a GPRS network system. Real-time delivery to centralized monitoring centers at all levels to achieve unified monitoring and distributed management of power detection equipment.
  • the smart meter has a power information collecting function and a data transmission function.
  • the smart meter has a processor capable of collecting power information, and a network interface for transmitting power information, the smart meter can adopt the above FIG. 1 and FIG.
  • the structure shown in FIG. 5, and the corresponding steps are performed to achieve the corresponding technical effects.
  • the collection device of the centralized control center can be used as the receiving end of the data, adopting the structure shown in FIG. 3, FIG. 4, and FIG. 5 above, and performing corresponding steps to achieve the corresponding technical effects.
  • an embodiment of the present invention provides a data packet transmission system, which includes a device as a transmitting end and a device as a receiving end to implement data packet transmission.
  • the device as the transmitting end may be the device shown in FIG. 1, FIG. 2, FIG. 5 or FIG. 6 , which can implement the technical effects of the corresponding embodiment of FIG. 1 , FIG. 2 , FIG. 5 or FIG. 6 ;
  • the device as the receiving end may be the device shown in FIG. 3, FIG. 4, FIG. 5 or FIG. 6 above, which can achieve the technical effects of the corresponding embodiment of FIG. 3, FIG. 4, FIG. 5 or FIG.
  • the system may also include other necessary devices, such as an access device, a network management system, a server, etc., which are not limited herein.
  • FIG. 7 is a schematic flowchart of a method for data packet transmission according to an embodiment of the present invention.
  • the method is applied to a half-duplex FDD machine-to-machine system, and the execution body thereof is the data packet shown in FIG. 1, FIG. 5 or FIG.
  • the transmitting device which is the transmitting end of the data packet, specifically, the device can be a base station, a machine, a water meter with a communication function, an electric meter, etc., a mobile phone, and supports various communication systems (2G/3G/4G/5G)
  • the communication device of the /wifi/Bluetooth, etc., the terminal of the M2M referring to FIG. 7, the method includes the following steps:
  • Step 100 Send a set of data packets to the peer end, where the set of data packets includes n data packets, where the n data packets are sent in sequence corresponding to n processes, and the n is greater than or equal to two.
  • Step 101 When the group of data packets is successfully sent, send the next group of data packets to the peer end.
  • the method for transmitting a data packet provided by the embodiment of the present invention sends a set of data packets to a peer end by means of a data packet transmission, where the set of data packets includes n data packets, and the n data packets are sent in sequence according to the sequence Corresponding to n processes, the n is a positive integer greater than or equal to two, and the n ⁇ the maximum number of processes, further, when the set of data packets is successfully sent, the device for transmitting the data packet further refers to the The peer sends the next set of data packets.
  • the embodiment of the present invention ensures that only after a group of data packets is successfully transmitted, the next group of data packets is transmitted, and the transmitting end only needs to cache a group of data packets at the receiving end. It is also only necessary to cache a maximum of one group of packets or a packet that is not successfully packaged (when a package is required), thereby saving resources, and further, a method of transmitting a next set of data packets after a successful transmission of a set of data packets is performed.
  • the method for transmitting data packets in the embodiment of the present invention ensures transmission efficiency and system throughput by avoiding the difference in the transmission progress of each data packet due to the continuous transmission of data packets, and thus the complex identification, grouping, and retransmission mechanisms are required. At the same time, it can reduce the cost and complexity of the solution implementation.
  • the embodiment of the present invention can send a group of data packets each time, can quickly send data packets, save terminal power consumption, and improve throughput of data packet transmission.
  • the RLC layer is cancelled, and the MAC layer supports simple unpacking and grouping functions.
  • the MAC layer splits the data packets that need to be split into packets of appropriate size according to the real-time situation of the channel, and the data packets of the MAC layer may be original data packets or sub-data packets.
  • the data packet is an unpacked original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet.
  • a group of data packets including the type of the data packet may have the following possibilities: 1. A group of data packets only includes multiple sub-data packets obtained by splitting the original data packet; 2. A group of data packets includes all of the data packets. Split original data packet; Third, a group of data packets contains multiple sub-packets obtained by splitting the original data packet and unpacked original data packets.
  • the sender can split the original data packet.
  • the size of the threshold is not limited, and the threshold may be set according to system requirements in different scenarios.
  • the group of data packets includes at least two sub-packets
  • the packet header of the at least one of the sub-packets includes group packet indication information, where the group packet indication information is used by the peer end to receive at least two of the sub-data packets, and at least two according to the group packet indication information.
  • the sub-packets are grouped;
  • a group of data packets includes multiple sub-data packets obtained by splitting the original data packet
  • the sub-packet is grouped.
  • a possible implementation manner is that the last sub-packet belonging to the original data packet should include an indication that the sub-packet is the last data packet.
  • each group of data packets may not carry the above-mentioned indication information.
  • each group of data packets transmitted by the preset transmitting end and the receiving end only includes a plurality of sub-data packets obtained by splitting one original data packet, and after receiving the data packet, the receiving end groups the data packet. Just fine.
  • each type of the data packet corresponds to a transmission mode
  • each group of data packets only includes one by splitting the original
  • the plurality of sub-packets obtained by the data packet adopt a specific transmission mode
  • the transmitting end notifies the receiving end
  • each group of data packets transmitted thereafter only includes a plurality of sub-packets obtained by splitting one original data packet, and then the group data is The packet does not need to carry the indication information, and after receiving the group of data packets, the receiving end can group the group of data packets.
  • the header of at least one of the sub-data packets includes the group package indication information, and each of the original The data packet carries an identifier for the peer to identify the original data packet.
  • each sub-packet carries a 1 bit (0/1) indication, 1 indicates the last sub-packet or the unsplit original data packet, and 0 indicates the non-last sub-packet; for example, sending The end splits an original data packet into five sub-packets, which also include two other unsplit original data packets, for a total of seven data packets.
  • the packet indication information carried by the first to fourth sub-packets is “0”, and the packet indication information carried by the last sub-packet is “1”.
  • the packet indication information carried by the last sub-packet is “1”.
  • the packet indication information carried by the packet is "1".
  • FIG. 8 is a schematic flowchart of another method for data packet transmission according to an embodiment of the present invention, where the execution body is the data packet transmission shown in FIG. 2, FIG. 5 or FIG.
  • the device referring to FIG. 8, before step 101, further includes the following steps:
  • Step 102 Receive a receiving response message sent by the peer end, where the receiving response message carries a receiving failure information of the data packet, and/or a receiving success information of the data packet;
  • the receiving response message includes the receiving failure information of the data packet, retransmitting the data packet corresponding to the receiving failure information of the data packet.
  • the data packet retransmission mechanism of the method for data packet transmission according to the embodiment of the present invention is described below by using a specific embodiment. It should be noted that the following embodiments of the present invention are only implemented by using several possible implementation manners as examples. It is to be understood that the scope of protection of the present invention is not limited. It is obvious that other possible packet retransmission mechanisms should also fall within the protection scope of the present invention based on the method for data packet transmission provided by the embodiments of the present invention.
  • the receiving end sends the receiving failure information of the data packet to the sending end, and the function is to notify the sending end which data packet transmission fails, and further, the data packet fails to be received.
  • Information can be used to indicate a group of packet transmission failures, and can also be used to indicate that one or more packets in a group of packets failed to transmit. The following two possible scenarios are illustrated by specific embodiments:
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to indicate retransmission of the m data packets, where m is a positive integer greater than zero, and m ⁇ n;
  • sending the next set of data packets to the peer end including:
  • FIG. 9 is a schematic diagram of a data packet retransmission method according to an embodiment of the present invention, where the execution body is the device for transmitting the data packet shown in FIG. 1, FIG. 2, FIG. 5 or FIG.
  • the method before the retransmission of the m data packets on the m processes according to the data packet retransmission indication, the method further includes:
  • Step 200 Determine if the number of retransmissions of at least one of the data packets exceeds a maximum number of retransmissions of the preset data packet.
  • Step 201 If the number of retransmissions of the at least one data packet exceeds a preset maximum number of retransmissions of the data packet, retransmission of the at least one of the data packets is stopped.
  • Step 202 Retransmit at least one of the data packets if the number of retransmissions of the at least one data packet does not exceed a maximum number of retransmissions of the preset data packet.
  • step 203 to step 205 may also be added, specifically:
  • Step 203 Determine whether the number of retransmissions of the group of data packets exceeds the maximum number of retransmissions of the group.
  • Step 204 If the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group, the group of data packets is retransmitted.
  • Step 205 If the number of retransmissions of the group of data packets exceeds the maximum number of retransmissions of the group, discard the group of data packets, and send the next group of data packets to the peer end.
  • FIG. 10 is a schematic diagram of another method for retransmitting a data packet according to an embodiment of the present invention, where the execution subject is the apparatus for transmitting data packets shown in FIG. 1, FIG. 2, FIG. 5 or FIG. 6, the data.
  • the receiving failure information of the packet is a group retransmission indication, and the group retransmission indication is used to indicate that the group of data packets is retransmitted.
  • the method includes the following steps:
  • Step 300 Determine whether the number of retransmissions of the group of data packets exceeds the maximum number of retransmissions of the group;
  • Step 301 If the number of retransmissions of the group of data packets exceeds the maximum number of retransmissions of the group, discarding the group of data packets, and sending the next group of data packets to the peer end;
  • Step 302 If the number of retransmissions of the group of data packets does not exceed the maximum number of retransmissions of the group, retransmit the group of data packets according to the group retransmission indication.
  • step 303 is performed.
  • step 101 in FIG. 10 is as follows:
  • Step 303 After the n data packets are successfully sent, send the next group of data packets to the peer end.
  • the transmitting end retransmits according to the receiving failure information of the data packet.
  • the sending end or the receiving end may set the maximum number of retransmissions of the data packet and the maximum number of retransmissions of the group, and maintain the weight of each data packet.
  • the number of transmissions and the number of retransmissions of each group of data packets Before a data packet is retransmitted, the number of retransmissions of the current data packet is compared with the maximum number of retransmissions of the data packet, if the maximum weight of the data packet is not exceeded.
  • the number of transmissions allows the packet to be retransmitted, and after retransmission, adds "1" to the number of retransmissions of the packet.
  • the transmitting end retransmits the group of data packets; or, if the maximum number of retransmissions of the group is exceeded, the group of data packets is discarded, and the next group of data packets is performed. Send.
  • the sender or the receiver maintains a timer for each data packet, and maintains a timer for each group of data packets, for example, the sender side, when sending a group of data packets, for the group of data packets
  • Each data packet the sender end correspondingly maintains a timer, the timer is used to time the transmission time of each data packet, and the number of retransmissions of each data packet is not limited during the transmission time.
  • the sender can also maintain a timer for a group of data packets. The purpose of the timer is to time the transmission time of a group of data packets.
  • the retransmission of the group of data packets is not here.
  • the transmission time of the group of data packets exceeds the upper limit of the transmission time preset by the corresponding timer, the transmission of the group of data packets is abandoned, and the transmission of the next group of data packets is performed.
  • the receiving end can also maintain a similar timer to time the transmission time of each data packet and each group of data packets, thereby abandoning the transmission after a data packet or a group of data packets exceeds a predetermined transmission time. It should be noted that, in the scheme that the receiving end performs the transmission time counting by the timer, when a data packet or a group of data packets is discarded, the feedback response message fed back to the transmitting end is reported. The receiving failure information of the data packet is not carried, so that the transmitting end does not retransmit the corresponding data packet or a group of data packets.
  • the data packet retransmission mechanism provided by the embodiment of the present invention ensures that when one or several data packets in a group of data packets fail to be received, by setting a data packet retransmission and a group of data packets to retransmit two retransmission mechanisms.
  • the transmitting end retransmits one or several data packets that failed to be transmitted according to the receiving response message fed back by the receiving end; or, retransmits a group of data packets.
  • a group of data packets may include several sub-packets obtained by splitting one original data packet, and when the sub-data packet fails to be received, the transmitting end only retransmits and transmits.
  • the packet retransmission mechanism provided by the embodiment of the present invention saves the resources occupied by the transmission and improves the transmission efficiency, compared with the prior art that uses the single-process transmission.
  • FIG. 11 is a schematic flowchart diagram of another method for data packet transmission according to an embodiment of the present invention.
  • the method is applied to a half-duplex FDD machine-to-machine system, and an execution subject is an execution subject thereof as shown in FIG. 3, FIG. 5 or FIG. 6 shows the device for transmitting data packets.
  • the device can be used for base station, machine, water meter with electric function, electric meter, meter reading, mobile phone, and various communication systems (2G/3G/4G/5G/wifi/Bluetooth)
  • the communication device and the M2M terminal include the following steps:
  • Step 400 Receive a set of data packets sent by the peer end, where the set of data packets includes n data packets, where the n data packets respectively correspond to n processes in sequence, and the n is greater than or equal to two. An integer, and the n ⁇ maximum number of processes;
  • Step 401 When the group of data packets is successfully received, receive the next group of data packets sent by the peer end.
  • the method for transmitting a data packet receives a set of data packets sent by a peer end by using a device for transmitting a data packet as a receiving end, where the set of data packets includes n data packets, and the n data packets are pressed.
  • the sequence corresponds to n processes, respectively, wherein n is a positive integer greater than or equal to two, and the n ⁇ maximum number of processes, when the group of data packets is successfully received, the device receives the sent by the peer end.
  • the next set of packets corresponds to n processes, respectively, wherein n is a positive integer greater than or equal to two, and the n ⁇ maximum number of processes, when the group of data packets is successfully received.
  • the embodiment of the present invention ensures that only after a group of data packets is successfully transmitted, the next group of data packets is received, so that the device only needs to cache the most before receiving successfully. A set of data packets or packets that are not successfully packaged (when a packet is required), thereby saving cache resources. Further, the manner in which a set of data packets is successfully received after receiving the next set of data packets is avoided. Transfer packets resulting in each number According to the different transmission progress of the packet, it is necessary to set a complex identification, grouping, and retransmission mechanism.
  • the method for transmitting a data packet provided by the embodiment of the present invention reduces the cost of implementing the scheme when using the half-duplex FDD transmission mode. the complexity.
  • the embodiment of the present invention can receive a group of data packets each time, can quickly receive data packets, save terminal power consumption, and improve throughput of data packet transmission.
  • the data packet received by the device as the execution subject in this embodiment may be an unsplit original data packet, and/or the data packet is a sub-data packet obtained by splitting the original data packet.
  • the data packet is a sub-data packet obtained by splitting the original data packet.
  • the header of at least one of the sub-data packets includes the group packet indication information
  • the receiving end device After receiving at least two of the sub-data packets, grouping at least two of the sub-data packets according to the grouping packet indication information; or, when the transmitting end device uses only one of each group of data packets, by splitting When multiple sub-packets are obtained by the original data packet, each group of data packets may not carry the above indication information.
  • each group of data packets transmitted by the preset transmitting end and the receiving end only includes a plurality of sub-data packets obtained by splitting one original data packet, and after receiving the data packet, the receiving end groups the data packet.
  • each type of the data packet corresponds to a transmission mode
  • each group of data packets only includes one by splitting the original
  • the plurality of sub-packets obtained by the data packet adopt a specific transmission mode
  • the transmitting end notifies the receiving end
  • each group of data packets transmitted thereafter only includes a plurality of sub-packets obtained by splitting one original data packet, and then the group data is The packet does not need to carry the indication information, and after receiving the group of data packets, the receiving end can group the group of data packets.
  • the packet header of at least one of the sub-data packets includes the group packet indication information, and each of the original data packets carries And identifying, the receiving end device identifies the original data packet according to the identifier.
  • FIG. 12 is a schematic flowchart of another method for data packet transmission according to an embodiment of the present invention.
  • the execution subject is an execution subject of the foregoing FIG. 3, FIG. 4, and FIG. 5 or the apparatus for data packet transmission shown in FIG. 6, referring to FIG. 12, before step 401, the method further includes the following steps:
  • Step 402 Send a receiving response message to the peer end, where the receiving response message carries data Receive failure information of the packet, and/or success information of the reception of the data packet;
  • the receiving response message after the receiving the response message sent to the opposite end, if the receiving response message includes the receiving failure information of the data packet, receiving the receiving failure information corresponding to the data packet retransmitted by the opposite end data pack.
  • the receiving end sends the receiving failure information of the data packet to the sending end, and the function is to notify the sending end which data packet transmission fails, and further, the data packet fails to be received.
  • Information can be used to indicate a group of packet transmission failures, and can also be used to indicate that one or more packets in a group of packets failed to transmit. The following two possible scenarios are illustrated by specific embodiments:
  • the receiving failure information of the data packet is a data packet retransmission indication, where the data packet retransmission indication is used to instruct the peer end to retransmit the m data packets, where m is a positive integer greater than zero And m ⁇ n;
  • the receiving failure information of the data packet is a group retransmission indication, and the group retransmission indication is used to indicate that the peer retransmission is performed.
  • a set of data packets is used to indicate that the peer retransmission is performed.
  • the retransmission mechanism for each data packet and/or a group of data packets has been described in detail above, and will not be described here. It should be noted that the retransmission scheme for maintaining the transmission time by using a timer is described.
  • the device as the receiving end can set a timer, maintain a timer for each data packet, and maintain a timer for each group of data packets, so as to time the transmission time of each data packet and each group of data packets, A packet or a group of packets is discarded after a predetermined transmission time has elapsed.
  • the receiving end performs the transmission time counting by the timer, when a data packet or a group of data packets is discarded, the receiving response message fed back to the transmitting end does not carry the receiving failure information of the data packet, so that The sender does not retransmit the corresponding data packet or a group of data packets.
  • the data packet retransmission mechanism provided by the embodiment of the present invention, by setting data packet retransmission and a set of data The packet retransmits two retransmission mechanisms to ensure that when one or several packets in a group of packets fail to receive, the receiving end feeds back the response message to the sender, so that the sender retransmits the failed one or Several packets; or, retransmit a group of packets.
  • a group of data packets may include several sub-packets obtained by splitting one original data packet, and when the sub-data packet fails to be received, the transmitting end only retransmits and transmits.
  • the packet retransmission mechanism provided by the embodiment of the present invention saves the resources occupied by the transmission and improves the transmission efficiency, compared with the prior art that uses the single-process transmission.
  • FIG. 13 is a schematic diagram of interaction of another method for transmitting a data packet according to an embodiment of the present invention. Referring to FIG. 13, an interaction process between a device as a transmitting end and a device as a receiving end in the foregoing embodiment is specifically described. The interaction process includes the following steps:
  • Step 501 The sending end sends the n data packets to the receiving end on the n processes.
  • n data packets are a group of data packets, and a type of data packet including the type of the data packet may have the following possibilities: 1.
  • a group of data packets only includes multiple sub-data packets obtained by splitting the original data packet;
  • a set of data packets contains all the original data packets that are not split.
  • a set of data packets contains multiple sub-data packets obtained by splitting the original data packet and original data packets that are not split.
  • the method may further include:
  • Step 500 The sender shovels the original data packet to obtain s sub-data packets, where s is less than or equal to n.
  • Step 502 The sending end receives the receiving response message sent by the peer end.
  • the receiving end sends a receiving response message at a specific time, for example, after receiving m data packets, sending a receiving response message to the transmitting end, where the receiving response message includes the receiving situation of the m data packets.
  • the receiving end wants the sending end to send a receiving response message after receiving a set of data packets.
  • the receiving response message carries the receiving failure information of the data packet, and/or the receiving success information of the data packet.
  • the receiving response message carries the receiving failure information of the data packet, referring to the foregoing embodiment, the receiving failure information of the data packet is used to indicate that one or several data packets in the group of data packets are retransmitted.
  • step 501 It can be used to indicate that a group of data packets is retransmitted, and the transmitting end repeats step 501.
  • the data packet sent by the specific sending end indicates that the data packet receiving failure information indicates that the data packet needs to be retransmitted. If the receiving response message only carries the receiving success information of the data packet, step 503 is performed.
  • the sender and the receiver respectively maintain a send buffer for the process and
  • the receive buffer is used to store the data packets sent by the current process for retransmission in case of an error, and the receive buffer stores the data packets received on the current process.
  • Step 503 The sending end sends the next set of n data packets to the receiving end on the n processes.
  • the sending end performs the triggering condition for sending the next group of n data packets, which may be that the last group of data packets is successfully sent; or the transmission is abandoned because the number of retransmissions of the previous group of data exceeds a predetermined maximum value; or, a group
  • the transmission time of the data packet exceeds the upper limit of the transmission time; or, for the user or the system, for example, according to the user's needs, the control network element in the system sends a discard transmission command to the sender, instructing the sender to abandon the previous group of data packets.
  • the sender may determine whether to stop the transmission of the last group of data packets, for example, the data packet contains status information of a certain service, when the previous group The data packet has not been transmitted yet, and the new set of data packets contains the latest status information of the service.
  • the receiving end does not need the state information contained in the previous set of data packets. Therefore, the transmitting end can The service characteristics of the group data packet, abandoning the transmission of the previous group of data packets, and directly transmitting the next group of data packets.
  • the receiving end since the receiving end collectively feeds back a group of data packets, that is, the receiving end does not need to continuously switch between sending and receiving states, thereby reducing the handover delay. .
  • the transmission rate itself is low, and the time for each transmission is long, so the time interval between two retransmissions is large, the device for transmitting the above data packet can be an M2M terminal, and because of the M2M terminal Generally, it does not move, or the mobility is low, and the channel changes slowly in time. Therefore, the retransmission time interval of this scheme is large, and the time diversity gain is relatively easy to obtain.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif, un système et un procédé de transmission de paquet de données, le procédé consistant : à transmettre un groupe de paquets de données à un terminal opposé, un groupe de paquets de données comprenant n paquets de données, n paquets de données correspondant séquentiellement et respectivement à n processus durant la transmission, n étant un nombre entier positif supérieur ou égal à 2, et n ≤ un nombre maximal de processus ; et à transmettre un groupe suivant de paquets de données au terminal opposé lorsque le groupe précédent de paquets de données est transmis avec succès. Par comparaison avec l'état de la technique qui utilise une transmission à multiples processus, la présente invention garantit de transmettre le groupe suivant de paquets de données uniquement après que le groupe précédent de paquets de données a été transmis avec succès, de telle sorte qu'un terminal de transmission a uniquement besoin de mettre en cache un groupe de paquets de données au plus, et un terminal de réception a également uniquement besoin de mettre en cache un groupe de paquets de données ou des paquets de données non condensés avec succès au plus, permettant ainsi d'économiser des ressources ; en outre, la présente invention utilise un procédé pour transmettre le groupe suivant de paquets de données après que le groupe précédent de paquets de données a été transmis avec succès, permettant ainsi de réduire le coût et la complexité pour réaliser une solution, tout en garantissant une efficacité de transmission et un débit du système.
PCT/CN2014/087452 2014-09-25 2014-09-25 Dispositif, système et procédé de transmission de paquet de données WO2016045062A1 (fr)

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