WO2017107668A1 - Procédé et dispositif de transmission inverse de données - Google Patents

Procédé et dispositif de transmission inverse de données Download PDF

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Publication number
WO2017107668A1
WO2017107668A1 PCT/CN2016/103997 CN2016103997W WO2017107668A1 WO 2017107668 A1 WO2017107668 A1 WO 2017107668A1 CN 2016103997 W CN2016103997 W CN 2016103997W WO 2017107668 A1 WO2017107668 A1 WO 2017107668A1
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WIPO (PCT)
Prior art keywords
side cell
data
gtp
source
packet
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PCT/CN2016/103997
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English (en)
Chinese (zh)
Inventor
赵海鹏
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中兴通讯股份有限公司
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Publication of WO2017107668A1 publication Critical patent/WO2017107668A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1809—Selective-repeat protocols

Definitions

  • the present disclosure relates to the field of wireless communications, for example, to a data back propagation method and apparatus.
  • the UE In the process of the inter-station or the inter-board handover, the UE needs to forward the data packet of the source-side cell to the target-side cell.
  • the data packet of the source side cell may be back-transmitted to the target side cell, but the target side cell does not feed back information to the source side cell, but passively receives the data packet of the source side cell back-transmission, so
  • the whole process of back-transmission data is unreliable transmission, that is, if packet loss occurs on the transmission link, the reliability of the data cannot be guaranteed.
  • the TCP Transmission Control Protocol
  • the TCP Transmission Control Protocol
  • the present disclosure provides a data back-transmission method and device, which can ensure the reliability of data back-transmission and avoid packet loss, thereby enhancing the user experience.
  • an embodiment of the present disclosure provides a data back propagation method, which is applied to a target side cell in data back propagation, where the method includes:
  • GPRS General Packet Radio Service
  • GTP GPRS Tunnelling Protocol
  • the first time point of receiving the first discontinuous GTP packet is recorded, and the time interval between the discontinuous GTP packet received and the first time point is exceeded.
  • the threshold is set, a back-propagation status report is sent to the source-side cell, where the back-propagation status report includes the lost GTP message information.
  • the method before the back-transmitting data sent by the receiving source-side cell, the method further includes:
  • the switch response is returned to the source side cell, and packet loss detection is enabled.
  • the method further includes:
  • the packet loss detection is stopped.
  • the back-end status report is sent to the source-side cell, where the back-propagation status report includes There is missing GTP message information.
  • the preset threshold ranges from 2 to 5 ms.
  • the embodiment of the present disclosure further provides a data back-transmission device, which is applied to a target side cell in data back-transmission, and the device includes:
  • a receiving module configured to receive back-transmission data sent by the source-side cell
  • the detecting module is configured to detect whether the received GTP message of the GRPS tunneling protocol user plane is continuous;
  • the processing module is configured to: if the GTP packet is not consecutive, record the first time point of receiving the first discontinuous GTP packet, and the discontinuous GTP packet received thereafter and the first time point When the time interval exceeds the preset threshold, the back-end status report is sent to the source-side cell, where the back-propagation status report includes the lost GTP message information.
  • the receiving module is further configured to receive a handover request sent by the source side cell;
  • the processing module is further configured to return a handover response to the source side cell, and enable packet loss detection.
  • the receiving module is further configured to receive a data transmission end message sent by the source side cell;
  • the detecting module is further configured to detect whether the GTP packet received at the current time point is continuous.
  • the processing module is further configured to stop the packet loss detection when the GTP packet received at the current time point is continuous; and send the back propagation status report to the source cell when the GTP packet received at the current time point is not continuous.
  • the backhaul status report includes missing GTP message information.
  • the embodiment of the present disclosure further provides a data back propagation method, which is applied to a source side cell in data back propagation, and the method includes:
  • the back-propagation status report includes the lost GRPS tunneling protocol user plane GTP message information
  • the device detects whether the corresponding terminal information is deleted. If the corresponding terminal information is not deleted, the lost GTP packet is retransmitted according to the lost GTP packet information.
  • the method before the sending the back-transmission data to the target-side cell, the method further includes:
  • the method further includes:
  • the transmission of the backhaul data is stopped, and the data transmission end message is sent to the target side cell.
  • the embodiment of the present disclosure further provides a data back-transmission device, which is applied to a source-side cell in data back-transmission, and the device includes:
  • a sending module configured to send back data to the target side cell
  • a receiving module configured to receive a back-propagation status report returned by the target-side cell, where the back-propagation status report includes a lost GRPS tunneling protocol user plane GTP message information;
  • the processing module is configured to detect whether the corresponding terminal information is deleted. If not, the lost GTP packet is resent according to the lost GTP packet information.
  • the receiving module is further configured to receive a measurement report sent by the terminal;
  • the sending module is further configured to send a handover request to the target side cell
  • the receiving module is further configured to receive a handover response returned by the target side cell.
  • the receiving module is further configured to receive a reconfiguration complete message reported by the terminal;
  • the sending module is further configured to stop sending back data and send a data transmission end message to the target side cell.
  • the present disclosure also provides a non-transitory storage medium storing computer executable instructions arranged to perform the data backpropagation method described above.
  • the present disclosure also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, The computer is caused to perform the above-described data back propagation method.
  • the present disclosure also provides an electronic device comprising at least one processor and a memory communicatively coupled to the at least one processor, the memory for storing instructions executable by the at least one processor, the instructions being The at least one processor, when executed, causes the at least one processor to perform the data backpropagation method described above.
  • the data back-propagation method and apparatus of the present disclosure can ensure the reliability of data back-transmission, avoid packet loss, and thereby enhance the user experience.
  • FIG. 1 is a schematic flow chart of a data back propagation method according to an embodiment of the present disclosure
  • FIG. 2 is a structural block diagram of a data back-transmission apparatus according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a data back-propagation method according to an embodiment of the present disclosure
  • FIG. 4 is a structural block diagram of a data back-transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a format of a GTP packet according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a format of a back-propagation status report according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of interaction of a data back propagation method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of interaction of a data back propagation method according to another embodiment of the present disclosure.
  • FIG. 9 is a structural block diagram of an electronic device according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a data back-transmission method and apparatus, which can ensure the reliability of data back-transmission, avoid packet loss, and thereby enhance user experience.
  • This embodiment provides a data back-transmission method, which is applied to a target-side cell in data back-transmission. As shown in FIG. 1 , the method in this embodiment includes: Step 101 to Step 103.
  • Step 101 Receive back-transmission data sent by the source-side cell.
  • Step 102 Detect whether the user plane packet of the received GTP (GRPS Tunneling Protocol) is continuous.
  • Step 103 If the GTP packet is not consecutive, record the first time point of receiving the first discontinuous GTP packet, and the discontinuous GTP packet received later and the time of the first time point. Room When the preset threshold is exceeded, the back-end status report is sent to the source-side cell, where the back-propagation status report includes the lost GTP message information.
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell detects whether the received GTP message is continuous. If the GTP message is not continuous, the record receives the first discontinuous GTP message. The first time point, when the time interval between the discontinuous GTP packet received and the first time point exceeds a preset threshold, the target side cell sends a back propagation status report to the source side cell, and the backhaul status report includes The lost GTP packet information, the source-side cell can re-send the lost GTP packet according to the lost GTP packet information.
  • the above technical solution can ensure the reliability of data back-transmission and avoid packet loss, thereby enhancing the user experience.
  • the method before the back-transmitting data sent by the receiving source-side cell, the method further includes:
  • the switch response is returned to the source side cell, and packet loss detection is enabled.
  • the method further includes:
  • the packet loss detection is stopped.
  • the back-end status report is sent to the source-side cell, where the back-propagation status report includes There is missing GTP message information.
  • the preset threshold ranges from 2 to 5 ms.
  • the present embodiment provides a data back-transmission device, which is applied to a target-side cell in data back-transmission.
  • the device includes: a receiving module 201, a detecting module 202, and a processing module 203.
  • the receiving module 201 is configured to receive the backhaul data sent by the source side cell.
  • the detecting module 202 is configured to detect whether the received GTP message is continuous.
  • the processing module 203 is configured to: if the GTP packet is not consecutive, record the first time point of receiving the first discontinuous GTP packet, and the discontinuous GTP packet received thereafter and the first time When the time interval of the point exceeds the preset threshold, the back-end status report is sent to the source-side cell, where the back-propagation status report includes the lost GTP message information.
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell detects whether the received GTP message is continuous. If the GTP message is not continuous, the record receives the first discontinuous GTP message. The first time point, when the time interval between the discontinuous GTP packet received and the first time point exceeds a preset threshold, the target side cell sends a back propagation status report to the source side cell, and the backhaul status report includes The lost GTP packet information, the source-side cell can re-send the lost GTP packet according to the lost GTP packet information.
  • the above technical solution can ensure the reliability of data back-transmission and avoid packet loss, thereby enhancing the user experience.
  • the receiving module is further configured to receive a handover request sent by the source side cell;
  • the processing module is further configured to return a handover response to the source side cell, and enable packet loss detection.
  • the receiving module is further configured to receive a data transmission end message sent by the source side cell;
  • the detecting module is further configured to detect whether the GTP packet received at the current time point is continuous.
  • the processing module is further configured to stop the packet loss detection when the GTP packet received at the current time point is continuous; and send the back propagation status report to the source cell when the GTP packet received at the current time point is not continuous.
  • the backhaul status report includes missing GTP message information.
  • This embodiment provides a data back-transmission method, which is applied to a source-side cell in data back-transmission. As shown in FIG. 3, this embodiment includes: Step 301 to Step 303.
  • Step 301 Send back-transmission data to the target side cell.
  • Step 302 Receive a back-propagation status report returned by the target-side cell, where the back-propagation status report includes the lost GTP message information.
  • Step 303 Detect whether the corresponding terminal information is deleted. If not, delete the lost GTP packet according to the lost GTP packet information.
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell sends a back-propagation status report to the source-side cell.
  • the back-propagation status report includes the lost GTP message information, and the source-side cell is based on the lost The GTP packet information re-sends the lost GTP packet.
  • the method before the sending the back-transmission data to the target-side cell, the method further includes:
  • the method further includes:
  • the transmission of the backhaul data is stopped, and the data transmission end message is sent to the target side cell.
  • the present embodiment provides a data back-transmission device, which is applied to a source-side cell in data back-transmission.
  • the device includes: a sending module 401, a receiving module 402, and a processing module 403.
  • the sending module 401 is configured to send back-transmission data to the target side cell.
  • the receiving module 402 is configured to receive a back-propagation status report returned by the target-side cell, where the back-propagation status report includes the lost GRPS tunneling protocol user plane GTP message information.
  • the processing module 403 is configured to detect whether the corresponding terminal information is deleted. If not, the lost GTP packet is retransmitted according to the lost GTP packet information.
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell sends a back-propagation status report to the source-side cell.
  • the back-propagation status report includes the lost GTP message information, and the source-side cell is based on the lost The GTP packet information re-sends the lost GTP packet.
  • the receiving module is further configured to receive a measurement report sent by the terminal;
  • the sending module is further configured to send a handover request to the target side cell
  • the receiving module is further configured to receive a handover response returned by the target side cell.
  • the receiving module is further configured to receive a reconfiguration complete message reported by the terminal;
  • the sending module is further configured to stop sending back data and send a data transmission end message to the target side cell.
  • the data is transmitted in the GTP packet format.
  • the specific format is shown in Figure 5.
  • the target-side cell determines whether it exists according to the GTP SN (serial number) of the packet. Packet loss phenomenon, if there is a packet loss, the target-side cell will report the back-transmission status report to the source-side cell.
  • the specific format is shown in Figure 6, so that the source-side cell reports retransmission of the lost packet according to the back-transmission status, thereby ensuring The reliability of switching transmissions.
  • the data back propagation method of this embodiment includes the following steps:
  • the UE sends a measurement report (Measure report) to the source side cell, and the source side cell receives the measurement report and starts to prepare for handover;
  • the source side cell sends a handover request (Handover Request) to the core network MME (Mobility Management Entity), and the MME transmits the handover request to the target side cell;
  • Handover Request a handover request
  • MME Mobility Management Entity
  • the target side cell After receiving the handover request, the target side cell establishes the UE instance and starts the handover backhaul packet loss detection, and responds the handover request (Handover Request ack) to the core network MME, and the MME transparently transmits the handover. Should be given to the source side cell;
  • the source side cell sends a connection reconfiguration message (RrcConnextion RrcConfiguration) to the UE, and simultaneously transmits a Packet Data Convergence Protocol (PDCP) SN (Serial Number) and a HFN (Hyper Frame Number).
  • PDCP Packet Data Convergence Protocol
  • HFN Heyper Frame Number
  • the target side cell receives the backhaul data of the source side cell and is still in the switching state to detect whether the GTP SN is continuous, if it is consecutively stored in the receiving queue or transmits the data of the source side back to the UE, if not, continue the step. (6);
  • the target-side cell After receiving the first GTP SN discontinuous packet, the target-side cell records the timestamp, and sends the reverse to the source-side cell after the interval between the subsequent discontinuous packet and the first discontinuous packet exceeds 2 ms.
  • the status report, the format of the back-propagation status report is as shown in Figure 6. Fill in the missing pieces of the message and the GTP SN information of the start and end.
  • a back-propagation status report can contain up to four sets of discontinuous packet loss intervals. If a message is lost, the start sequence number is the same as the end sequence number;
  • the source side cell After receiving the backhaul status report, the source side cell detects whether the source side UE information is deleted. If the source side UE information is not deleted, the lost GTP SN retransmits the lost message if the source is detected. If the side UE information is deleted, the processing ends.
  • the target side cell After receiving the Endmarker, the target side cell stops the packet loss detection if there is no packet loss, and directly sends a status report to the source side cell if there is a packet loss;
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell detects whether the received GTP message is continuous. If the GTP message is not continuous, the record receives the first discontinuous GTP message. The first time point, when the time interval between the discontinuous GTP message received and the first time point exceeds 2 ms, the target side cell sends a back propagation status report to the source side cell, and the backhaul status report includes the lost GTP packet information, the source-side cell re-transmits the lost GTP packet according to the lost GTP packet information.
  • the above technical solution can ensure the reliability of data back-transmission and avoid packet loss, thereby enhancing the user experience.
  • the data is transmitted in the GTP packet format.
  • the specific format is shown in Figure 5.
  • the target-side cell determines whether it exists according to the GTP SN (serial number) of the packet. Packet loss phenomenon, if there is a packet loss, the target-side cell will report the back-transmission status report to the source-side cell.
  • the specific format is shown in Figure 6, so that the source-side cell reports retransmission of the lost packet according to the back-transmission status, thereby ensuring The reliability of switching transmissions.
  • the data back propagation method of this embodiment includes the following steps:
  • the UE sends a measurement report (Measure report) to the source side cell, and the source side cell receives the measurement report and starts to prepare for handover;
  • the source side cell sends a handover request (Handover Request) to the target side cell;
  • the target side cell After receiving the handover request, the target side cell establishes the UE instance and starts the handover backhaul packet loss detection, and returns a handover request (Handover Request ack) to the source side cell;
  • the source side cell sends a connection reconfiguration message (RrcConnextion RrcConfiguration) to the UE, and simultaneously transmits PDCP (Packet Data Convergence Protocol) SN (serial number) and HFN (super frame number) information to the target side cell;
  • PDCP Packet Data Convergence Protocol
  • SN Serial number
  • HFN super frame number
  • the target side cell receives the backhaul data of the source side cell and is still in the switching state to detect whether the GTP SN is continuous, if it is consecutively stored in the receiving queue or transmits the data of the source side back to the UE, if not, continue the step. (6);
  • the target side cell After receiving the first GTP SN discontinuous packet, the target side cell starts a 5ms timer, and sends a backhaul status report to the source side cell after the 5ms timer expires.
  • the format of the backhaul status report is as shown in Figure 6. In the description, fill in the missing pieces of the message and the GTP SN information of the start and end.
  • a back-propagation status report can contain up to four sets of discontinuous packet loss intervals. If only one message is lost, the start sequence number and the end sequence number are the same;
  • the source side cell After receiving the backhaul status report, the source side cell detects whether the source side UE information is deleted. If not, the source side UE retransmits the lost message according to the indicated lost GTP SN, otherwise the processing ends;
  • the target side cell After receiving the Endmarker, the target side cell stops the packet loss detection if there is no packet loss, and directly sends a status report to the source side cell if there is a packet loss;
  • the source side cell After receiving the message (Ue Context Release msg) of the core network release UE, the source side cell stops the retransmission retransmission process.
  • the target side cell receives the back-transmission data sent by the source-side cell, and the target-side cell detects whether the received GTP message is continuous. If the GTP message is not continuous, the record receives the first discontinuous GTP message. The first time point, when the time interval between the discontinuous GTP packet received and the first time point exceeds 5 ms, the target side cell sends a back propagation status report to the source side cell, and the backhaul status report includes the lost GTP packet information, the source side cell retransmits the lost according to the lost GTP packet information.
  • the GTP packet can ensure the reliability of data back-transmission and avoid packet loss, thereby enhancing the user experience. This embodiment can also reduce the load of the service server and the core network.
  • the present disclosure also provides a non-transitory storage medium storing computer executable instructions arranged to perform the data backpropagation method of the above embodiments.
  • the present disclosure also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, The computer is caused to execute the data back propagation method of the above embodiment.
  • FIG. 9 is a structural block diagram of an electronic device according to an embodiment of the present disclosure.
  • the electronic device may include a processor 91 and a memory 93, and may further include a communication interface 92 and a bus 94.
  • the processor 91, the communication interface 92, and the memory 93 can complete communication with each other through the bus 94.
  • Communication interface 92 can be used for information transfer.
  • the processor 91 can call the logic instructions in the memory 93 to perform the data back propagation method of the above embodiment.
  • the logic instructions in the memory 93 described above may be implemented in the form of a software functional unit and sold or used as a stand-alone product, and may be stored in a computer readable storage medium.
  • the technical solution of the present disclosure may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network) The device or the like) performs all or part of the steps of the method described in various embodiments of the present disclosure.
  • the foregoing storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. a medium that can store program code, or It is a transient storage medium.
  • modules may be implemented in software for execution by various types of processors.
  • an identified executable code module can comprise one or more physical or logical blocks of computer instructions, which can be constructed, for example, as an object, procedure, or function. Nevertheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different physicalities. When these instructions are logically combined, they constitute a module and achieve the specified purpose of the module. .
  • the executable code module can be a single instruction or a plurality of instructions, and can even be distributed across multiple different code segments, distributed among different programs, and distributed across multiple memory devices.
  • operational data may be identified within the modules and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed at different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.
  • the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software, and the technician can construct a corresponding hardware circuit to implement the corresponding function without considering the cost.
  • the hardware circuitry includes conventional Very Large Scale Integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI Very Large Scale Integration
  • the modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.
  • the data back-propagation method and apparatus of the present disclosure can ensure the reliability of data back-transmission, avoid packet loss, and thereby enhance the user experience.

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Abstract

L'invention porte sur un procédé et un dispositif de transmission inverse de données, qui appartiennent au domaine des communications sans fil. Le procédé de transmission inverse de données consiste : à recevoir des données de transmission inverse envoyées par une cellule latérale source; à détecter si un paquet GTP reçu d'un plan utilisateur GTP est continu; et si le paquet GTP est discontinu, à enregistrer un premier instant de réception du premier paquet GTP discontinu, et lorsqu'un intervalle de temps entre un paquet GTP discontinu ultérieurement reçu et le premier instant dépasse une valeur seuil prédéfinie, à envoyer un rapport d'état de transmission inverse à la cellule latérale source, le rapport d'état de transmission inverse comprenant des informations de paquet GTP perdues.
PCT/CN2016/103997 2015-12-21 2016-10-31 Procédé et dispositif de transmission inverse de données WO2017107668A1 (fr)

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