WO2021104335A1 - Procédé de transmission de données, et appareil pour cela - Google Patents

Procédé de transmission de données, et appareil pour cela Download PDF

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Publication number
WO2021104335A1
WO2021104335A1 PCT/CN2020/131579 CN2020131579W WO2021104335A1 WO 2021104335 A1 WO2021104335 A1 WO 2021104335A1 CN 2020131579 W CN2020131579 W CN 2020131579W WO 2021104335 A1 WO2021104335 A1 WO 2021104335A1
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WIPO (PCT)
Prior art keywords
data packet
edge
edge gateway
information
session
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PCT/CN2020/131579
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English (en)
Chinese (zh)
Inventor
周军平
屈琴
郝文杰
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华为技术有限公司
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Publication of WO2021104335A1 publication Critical patent/WO2021104335A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/122—Avoiding congestion; Recovering from congestion by diverting traffic away from congested entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/825—Involving tunnels, e.g. MPLS

Definitions

  • This application relates to the field of Internet technology, and in particular to a data transmission method and device.
  • the current network is a convergent network. Under the current network, when the terminal accesses data, it passes through the centralized deployment gateway.
  • micro-cloud platforms at the network edge (for example, close to the base station), that is, multi-access edge computing/multi-access edge cloud (multi-access edge cloud). computing/cloud, MEC) platform.
  • the MEC gateway determines whether the data needs to be locally distributed based on the distribution rules. If the data needs to be distributed locally, the data is sent to the local network. If the data does not need to be distributed locally, the MEC gateway sends the data to the CSG/ASG, and the CSG/ASG sends the data to the core network for processing. However, this will result in a large amount of data traffic that the MEC gateway needs to process.
  • the embodiments of the present application provide a data transmission method and device, which are beneficial to reduce the data traffic processed by the edge gateway.
  • an embodiment of the present application provides a data transmission method.
  • the method includes: receiving an uplink data packet from a terminal device, and determining session information corresponding to the uplink data packet; and the session information corresponding to the uplink data packet satisfies edge forwarding In the case of conditions, the uplink data packet is sent to the edge gateway.
  • the uplink data packet is sent to the edge gateway, which is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.
  • the session information may include the session type, and the edge forwarding condition may include one or more edge forwarding session types; the session information meeting the edge forwarding condition may include that the session type corresponding to the uplink data packet is the same as the edge forwarding session type .
  • the session information may include the identifier and session type of the access network device corresponding to the terminal device;
  • the method before sending the uplink data packet to the edge gateway, the method may further include: obtaining the address information of the edge gateway, modifying the destination address information of the uplink data packet to the address information of the edge gateway;
  • the specific implementation manner of sending to the edge gateway may be: sending the uplink data packet to the edge gateway according to the destination address information of the modified uplink data packet.
  • the uplink data packet can be sent to the edge gateway according to the modified destination address information of the uplink data packet. This helps to reduce the data traffic processed by the edge gateway.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the method may further include: when the session information corresponding to the uplink data packet does not meet the edge forwarding condition, sending the uplink data packet to the core network element.
  • the uplink data packet is sent to the core network element, and the data requested by the uplink data packet can be obtained from the core network. Avoid the failure of the upstream data packet to get a response.
  • the embodiments of the present application provide another data transmission method, the method includes: determining that the current tunnel information is different from the historical tunnel information; the tunnel information is the tunnel information between the core network element and the access network device ; Send the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the edge gateway can determine the current tunnel information according to the information carried in the downlink data packet, and encapsulate and send the downlink data packet from the local server according to the current tunnel information.
  • the method may further include: generating a downlink data packet.
  • the method may further include: receiving a downlink data packet from a core network element.
  • the downlink data packet may be the first n downlink data packets in the downlink data stream; where n may be a positive integer.
  • the edge gateway can learn the current tunnel information according to the received n downlink data packets, thereby helping to improve the success rate of the downlink data packets from the local server returning to the terminal device.
  • the method before sending the downlink data packet corresponding to the tunnel information to the edge gateway, the method may further include: obtaining address information of the edge gateway; and modifying the destination address information of the downlink data packet to the address information of the edge gateway
  • the specific implementation manner of sending the downlink data packet corresponding to the tunnel information to the edge gateway may be: sending the downlink data packet to the edge gateway according to the destination address information of the modified downlink data packet.
  • the downlink data packet can be sent to the edge gateway according to the modified destination address information of the downlink data packet. This is beneficial to improve the success rate of the downlink data packet from the local server returning to the terminal device.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the method may further include: determining the session information corresponding to the tunnel information; when the session information satisfies the edge forwarding condition, triggering the execution of the step of sending the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the downlink data packet corresponding to the tunnel information is sent to the edge gateway.
  • it is beneficial to the correct downlink data packet returned from the local network.
  • it can avoid sending the downlink data packet corresponding to the tunnel information to the edge gateway when the session information corresponding to the tunnel information does not meet the edge forwarding conditions, which is beneficial to reduce the data processed by the edge gateway flow.
  • an embodiment of the present application provides a data transmission device, which is a first network device or a device (such as a chip) having the function of the first network device.
  • the device has the function of realizing the data transmission method provided in the first aspect, and the function is realized by hardware or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • an embodiment of the present application provides another data transmission device, which is a second network device or a device (such as a chip) with the function of the second network device.
  • the device has the function of realizing the data transmission method provided by the second aspect, and the function is realized by hardware or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • an embodiment of the present application provides yet another data transmission device, which is a first network device or a device (such as a chip) having the function of the first network device.
  • the device includes a processor and a storage medium.
  • the storage medium stores instructions. When the instructions are executed by the processor, the device realizes the data transmission method provided in the first aspect.
  • the embodiments of the present application provide yet another data transmission device.
  • the device is a second network device or a device (such as a chip) with the function of the second network device.
  • the device includes a processor and a storage medium, and the storage medium stores There is an instruction, and when the instruction is executed by the processor, the device realizes the data transmission method provided in the second aspect.
  • an embodiment of the present application provides a data transmission system that includes the data transmission device described in the third aspect and the data transmission device described in the fourth aspect, or the data transmission system includes the fifth aspect The data transmission device and the data transmission device described in the sixth aspect.
  • an embodiment of the present application provides a computer-readable storage medium for storing computer program instructions used by the data transmission device described in the third aspect, which includes instructions for executing the method of the first aspect. program.
  • an embodiment of the present application provides a computer-readable storage medium for storing computer program instructions used by the data transmission device described in the fourth aspect, which includes instructions for executing the method of the second aspect. program.
  • an embodiment of the present application provides a computer program product.
  • the program product includes a program.
  • the program When the program is executed by a data transmission device, the device implements the method described in the first aspect.
  • an embodiment of the present application provides a computer program product.
  • the program product includes a program.
  • the program When the program is executed by a data transmission device, the device implements the method described in the second aspect.
  • Figure 1a is an existing network architecture diagram
  • FIG. 1b is a schematic diagram of the architecture of a communication system disclosed in an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a data transmission method disclosed in an embodiment of the present application
  • Fig. 3a is a schematic flowchart of another data transmission method disclosed in an embodiment of the present application.
  • Fig. 3b is a schematic diagram of an SRH extension header in an IPv6 data packet header disclosed in an embodiment of the present application
  • FIG. 5 is a schematic flowchart of yet another data transmission method disclosed in an embodiment of the present application.
  • FIG. 6a is a schematic diagram of a network architecture in which the control plane and the forwarding plane are separated according to an embodiment of the present application
  • FIG. 6b is a schematic diagram of a network architecture in which a control plane and a forwarding plane are integrated according to an embodiment of the present application;
  • FIG. 6c is a schematic diagram of a network architecture of a 5G independent networking disclosed in an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a data transmission device disclosed in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another data transmission device disclosed in an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another data transmission device disclosed in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another data transmission device disclosed in an embodiment of the present application.
  • FIG. 1b is a schematic diagram of the architecture of a communication system disclosed in an embodiment of the present application.
  • the communication system includes: a first network device and an edge gateway.
  • the first network device may receive the uplink data packet from the terminal device, determine the session information corresponding to the uplink data packet, and if the session information meets the edge forwarding condition, send the uplink data packet to the edge gateway. In this way, it is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.
  • that the session information corresponding to the uplink data packet satisfies the edge forwarding condition may indicate that the uplink data packet is used to access local services.
  • the edge gateway can receive the uplink data packet and send the uplink data packet to the local network.
  • the relevant data of the local business can be stored in the local network. Sending the uplink data packet used to access the local business to the local network is beneficial to improve the success rate of the user in accessing the local business.
  • the first network device may be an entity on the network side for transmitting or receiving signals.
  • the first network device may be an access network device (such as a base station).
  • the first network device may also be a device located behind the base station (not shown in FIG. 1b) in the uplink direction.
  • the first network device may be located between the base station and the edge gateway, and the first network device has the following function: receiving the uplink data packet sent by the base station (the uplink data packet comes from the terminal device), and determining the session corresponding to the uplink data packet Information, and when the session information meets the edge forwarding condition, the uplink data packet is sent to the edge gateway.
  • the edge gateway can send the received uplink data packet to the local network.
  • the edge gateway may be a multi-access edge computing/cloud (MEC) gateway, or other network elements that have the aforementioned functions of the edge gateway.
  • MEC multi-access edge computing/cloud
  • FIG. 2 is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • This method describes in detail how to reduce the data traffic processed by the edge gateway in the upstream direction.
  • the execution subject of step S201 to step S203 is the first network device, or the chip in the first network device
  • the execution subject of step S204 is the edge gateway or the chip in the edge gateway.
  • the first network device The edge gateway is the execution subject of the data transmission method as an example for description.
  • the method may include but is not limited to the following steps:
  • Step S201 The first network device receives an uplink data packet from a terminal device.
  • the first network device when the first network device is a base station, after the terminal device generates an uplink data packet, it may send the uplink data packet to the first network device.
  • the terminal device When the first network device is a device located behind the base station in the uplink direction, the terminal device can send the uplink data packet to the base station where the terminal device currently resides, and then the base station where the terminal device currently resides transmits the uplink data. The packet is sent to the first network device.
  • the terminal device may be an entity on the user side for receiving or transmitting signals.
  • the terminal equipment may be user equipment (UE), remote terminal, mobile terminal, wireless communication equipment, user equipment, and so on.
  • the user equipment may be a mobile phone, a desktop computer, a notebook computer, or other wearable devices.
  • Step S202 The first network device determines the session information corresponding to the uplink data packet.
  • the first network device may determine the session information corresponding to the uplink data packet according to the first information carried in the uplink data packet. It is further judged whether the session information meets the edge forwarding condition, and if the session information meets the edge forwarding condition, the uplink data packet is sent to the edge gateway.
  • the first information may be the source Internet Protocol (IP) address carried in the uplink data packet.
  • IP Internet Protocol
  • the source IP address can be used to determine the session to which the uplink data packet belongs.
  • the first network device may determine the session identifier corresponding to the source IP address carried in the uplink data packet as the session identifier corresponding to the uplink data packet according to the pre-stored correspondence between the source IP address and the session identifier.
  • the session indicated by the session identifier corresponding to the uplink data packet is the session to which the uplink data packet belongs. Further, the first network device may determine the session information of the session to which the uplink data packet belongs.
  • the first network device when the first network device is a base station, the first network device may store session information corresponding to a terminal residing under the first network device (that is, the base station).
  • the first network device When the first network device is a device located behind the first base station in the uplink direction, the first network device may store session information corresponding to the terminal camped under the first base station. Or, the session information corresponding to the terminal camped under the first base station is stored in the first base station.
  • the first base station After determining the session information corresponding to the foregoing uplink data packet, the first base station may send the uplink data packet and the corresponding session information to the first network device. So that the first network device sends the uplink data packet to the edge gateway when the session information meets the edge forwarding condition.
  • the number of the first base station may be one or more.
  • each terminal can correspond to one or more sessions, and each terminal can correspond to one or more source IP addresses.
  • the source IP addresses of data packets belonging to different sessions are different, and the source IP addresses of data packets belonging to the same session are different.
  • the address is the same.
  • the session mentioned in the embodiment of this application may be a protocol data unit (PDU) session in the fifth-generation mobile communication technology (fifth-generation, 5G), or a session in a next-generation network.
  • PDU protocol data unit
  • 5G fifth-generation mobile communication technology
  • 5G fifth-generation network
  • Step S203 the first network device sends the uplink data packet to the edge gateway when the session information meets the edge forwarding condition.
  • the session information may include a session type
  • sessions with different session types may be used to transmit different types of data
  • sessions with the same session type may be used to transmit the same type of data.
  • the network can allocate session resources for transmitting video application data and session resources for transmitting instant messaging application data to the terminal respectively.
  • the type of service requested by the uplink data packet can be determined by the session type corresponding to the uplink data packet.
  • the edge forwarding condition may include one or more edge forwarding session types. If the session type corresponding to the aforementioned uplink data packet is the same as any one of the one or more edge forwarding session types, it is determined that the session information corresponding to the uplink data packet meets the edge forwarding condition, and the uplink data packet is sent to Edge gateway. In this way, it is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.
  • the session type is not the edge forwarding session type.
  • the session type is not the edge forwarding session type.
  • VoIP voice over long-term evolution
  • the session type is not the edge forwarding session type. In this way, it is possible to avoid sending service streams that do not require local offloading to the edge gateway for processing, thereby helping to reduce the data traffic processed by the edge gateway.
  • the session type corresponding to the uplink data packet is the edge forwarding session type, it may indicate that the service data requested by the uplink data packet is stored in the local network.
  • the transmission of the uplink data packet in the latter The path is shorter. Therefore, compared with the core network, by sending the uplink data packet to the local network to obtain the data requested by the uplink data packet, it is beneficial to improve the efficiency of obtaining the data requested by the uplink data packet, and it is also beneficial to reduce the flow through the core network. Data traffic.
  • the session information may include the session type and the identification of the access network device (such as a base station) corresponding to the aforementioned terminal device.
  • the edge forwarding condition may include one or more edge forwarding device identifiers and one or more edge forwarding session types. If the identifier of the access network device is the same as any one of the one or more edge forwarding device identifiers, and the session type corresponding to the aforementioned uplink data packet is the same as any one of the above one or more edge forwarding session types, Then the first network device may determine that the session information corresponding to the uplink data packet satisfies the edge forwarding condition.
  • the access network device corresponding to the terminal device may be the base station where the terminal device currently resides.
  • operators can determine whether to deploy a local network based on the location of the base station, the number of users that the base station accesses, and other reasons. And the number of base stations that can be served by a local network is limited. In other words, not any base station can send the uplink data packet to the edge gateway after receiving the uplink data packet, and then obtain the data requested by the uplink data packet from the local network corresponding to the edge gateway.
  • the user can configure the service area of the edge gateway on the first network device, or the user can configure the service area of the edge gateway on a preset network device, and then the preset network device sends the service area of the edge gateway to the first network.
  • the device sends an indication message to indicate the service area of the edge gateway.
  • the service area of the edge gateway may be indicated by the edge forwarding device identifier, and the edge forwarding device identifier may be an access network device identifier (such as a base station identifier).
  • the coverage area of the base station indicated by the edge forwarding device identifier may characterize the service area of the edge gateway. Only when the base station identifier is the edge forwarding device identifier, the uplink data packet received by the base station can be sent to the edge gateway, and the data requested by the uplink data packet can be obtained from the local network corresponding to the edge gateway.
  • the first network device When the first network device receives the uplink data packet from the terminal device, and the identifier of the access network device corresponding to the terminal device is the edge forwarding device identifier, it may indicate that the access network device is located in the service area of the edge gateway. Correspondingly, the first network device can determine whether the session type corresponding to the uplink data packet is an edge forwarding session type, and if the session type is an edge forwarding session type, send the uplink data packet to the edge gateway. When the first network device receives the uplink data packet from the terminal device, and the identifier of the access network device corresponding to the terminal device is not the edge forwarding device identifier, it may indicate that the access network device is located outside the service area of the edge gateway. Correspondingly, the first network device may send the uplink data packet to the core network element.
  • the uplink data packet from the terminal device can be avoided Sent to the edge gateway. Since the access network device is located outside the service area of the edge gateway, even if the uplink data packet from the terminal device is sent to the edge gateway, the data requested by the uplink data packet cannot be obtained from the local network corresponding to the edge gateway. . This helps to prevent the uplink data packet from the terminal device from failing to receive a response.
  • the first network device may set the edge forwarding condition by default, or set and change the edge forwarding condition according to user operations.
  • the first network device may send the uplink data packet to the core network element. In this way, the data requested by the uplink data packet can be obtained from the core network, avoiding the failure of the uplink data packet to receive a response.
  • Step S204 The edge gateway sends the uplink data packet to the local server.
  • the edge gateway can strip off the general packet radio service tunneling protocol-user plane (GTPU) header, and then send the stripped uplink data packet To the local server.
  • GTPU general packet radio service tunneling protocol-user plane
  • the uplink data packet is sent to the edge gateway, which is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.
  • FIG. 3a is a schematic flowchart of another data transmission method provided by an embodiment of the present application.
  • the method describes in detail how the first network device modifies the address information of the uplink data packet so that the uplink data packet can pass through the edge.
  • Gateway the execution subject of step S301 to step S305 is the first network device, or the chip in the first network device, and the execution subject of step S306 is the edge gateway or the chip in the edge gateway.
  • the edge gateway is the execution subject of the data transmission method as an example for description.
  • the method may include but is not limited to the following steps:
  • Step S301 The first network device receives an uplink data packet from a terminal device.
  • Step S302 The first network device determines the session information corresponding to the uplink data packet.
  • step S301 to step S302 please refer to the specific description of step S201 to step S202 in FIG. 2 respectively, which will not be repeated here.
  • Step S303 The first network device obtains the address information of the edge gateway when the session information meets the edge forwarding condition.
  • the first network device may obtain the address information of the edge gateway and the address information of the uplink data packet, and then the uplink data according to the address information of the edge gateway The address information of the packet is modified so that the uplink data packet can pass through the edge gateway.
  • Step S304 The first network device modifies the destination address information of the uplink data packet to the address information of the edge gateway.
  • the address information of the uplink data packet may include destination address information. If the destination address information of the uplink data packet is the same as the address information of the edge gateway, it indicates that the uplink data packet originally has to pass through the edge gateway. At this time, the first network device may not change the address information of the uplink data packet. If the destination address information of the uplink data packet is different from the address information of the edge gateway, the first network device may modify the destination address information of the uplink data packet to the address information of the edge gateway.
  • the uplink data packet may be a version 4 Internet Protocol (Internet Protocol Version 4, IPv4) data packet or a version 6 Internet Protocol (Internet Protocol Version 6, IPv6) data packet.
  • the address information in the embodiment of the present application may include an IPv4 address or an IPv6 address.
  • the header of the uplink data packet may include an IPv6 standard header and a segment routing header (segment routing header, SRH).
  • segment routing header Segment routing header, SRH
  • the address of the intermediate node that must pass through can be specified through the SRH extension header.
  • SRH extension header Take the schematic diagram of the SRH extension header in the IPv6 packet header shown in FIG. 3b as an example.
  • the meaning of each field in the SRH extension header is as follows: Next Header: used to identify the type of the header immediately following the SRH.
  • Hdr Ext Len the length of the SRH extension header, Hdr Ext Len mainly refers to the length occupied from Segment List[0] to Segment List[n].
  • Routing Type Identifies the routing header type. Segments Left: The number of intermediate nodes that should still be visited before reaching the destination node.
  • Last Entry Include the index of the last element of the segment list in the segment list.
  • Flags Some flags of the data packet.
  • Segment List[n] A list of tag segments. The segment list is coded from the last segment of the path. The Segment List is in the form of an IPv6 address. Segment List[n] can be expressed as SL[n].
  • the first network device may modify the destination address of the uplink data packet to the IPv6 address of the edge gateway.
  • the Segments Left in the SRH extension header can also be updated to 0.
  • Step S305 The first network device sends the uplink data packet to the edge gateway according to the destination address information of the modified uplink data packet.
  • the first network device may query the routing table according to the modified destination address information of the uplink data packet, so as to send the uplink data packet to the edge gateway.
  • Step S306 The edge gateway sends the uplink data packet to the local server.
  • step S306 refers to the specific description of step S204 in FIG. 2, which will not be repeated here.
  • the uplink data packet can be sent to the edge gateway according to the modified destination address information of the uplink data packet. This helps to reduce the data traffic processed by the edge gateway.
  • FIG. 4 is a schematic flowchart of another data transmission method provided by an embodiment of the present application.
  • the method describes in detail how to reduce the data traffic processed by the edge gateway in the downstream direction.
  • the execution subject of step S401 to step S402 is the second network device, or the chip in the second network device, and the following takes the second network device as the execution subject of the data transmission method as an example for description.
  • the method may include but is not limited to the following steps:
  • Step S401 The second network device determines that the current tunnel information is different from the historical tunnel information; the tunnel information is tunnel information between the core network element and the access network device.
  • the second network device may be a core network element, a core network gateway, or a device before the edge gateway in the downlink direction. Downlink data packets can be smoothly returned to the terminal device through the tunnel information.
  • the tunnel in the embodiment of this application may refer to a GTPU tunnel or other network tunnels.
  • the tunnel information of the GTPU tunnel may include, but is not limited to: the identifier of the access network device and the tunnel endpoint identifier (TEID). Therefore, when the access network equipment accessed by the terminal equipment changes, and/or the TEID changes, the tunnel information will change.
  • the TEID may include the TEID of the user plane (TEIDU for short) and the TEID of the control plane (TEIDC for short).
  • the tunnel corresponding to TEIDU can be used to transmit user plane data
  • the tunnel corresponding to TEIDC can be used to transmit control plane data.
  • the core network can store tunnel information of all GTPU tunnels.
  • the core network can send a first message to the second network device, and the first message can indicate The current tunnel information is different from the historical tunnel information.
  • both the core network and the second network device may store tunnel information of all GTPU tunnels.
  • the core network may send a second message to the second network device.
  • the second message may carry current tunnel information. After receiving the second message, the second network device can determine that the tunnel information has changed by comparing the historical tunnel information with the current tunnel information.
  • Step S402 The second network device sends the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the edge gateway when the tunnel information changes, the edge gateway cannot learn the changed tunnel information (that is, the current tunnel information). Therefore, when the edge gateway receives the downlink data packet from the local server, it still follows the history The downlink data packet is sent with the tunnel information of, which will cause the downlink data packet to fail to be returned to the correct terminal device.
  • the second network device may send the downlink data packet corresponding to the changed tunnel information to the edge gateway.
  • the edge gateway can determine the current tunnel information according to the information carried in the downlink data packet, and then encapsulate the downlink data packet from the local server according to the current tunnel information, and send the encapsulated downlink data packet. In this way, it is beneficial to improve the success rate of the downlink data packet from the local server returning to the terminal device.
  • the downlink data packet corresponding to the tunnel information is sent to the edge gateway only when the tunnel information changes, which can avoid sending the downlink data packet from the core network to the edge gateway when the tunnel information does not change.
  • Edge gateway In this way, it is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.
  • the downlink data packet corresponding to the tunnel information sent to the edge gateway by the second network device may come from a core network element, or the downlink data packet may be sent by the second network device. Create it yourself.
  • the edge gateway cannot know the changed tunnel information (that is, the current tunnel information) when the tunnel information changes, if the downlink data packet corresponding to the changed tunnel information does not come from the core network (or the Internet), then the first Second, the network device cannot send downlink data packets from the core network (or the Internet) to the edge gateway.
  • the edge gateway cannot learn the current tunnel information, which will cause the downlink data packet from the local server (that is, the local network) to fail to return to the terminal device correctly.
  • the second network device can create downlink data packets by itself, which can avoid the situation that there is no downlink data packet from the Internet, causing the edge gateway to be unable to determine the current tunnel information, which is beneficial to improve the return of downlink data packets from the local server to the terminal device.
  • the success rate can be used to create downlink data packets by itself, which can avoid the situation that there is no downlink data packet from the Internet, causing the edge gateway to be unable to determine the current tunnel information, which is beneficial to improve the return of downlink data packets from the local server to the terminal device.
  • the second network device after determining that the tunnel information has changed, the second network device generates a downlink data packet corresponding to the tunnel information, and sends the downlink data packet to the edge gateway.
  • the edge gateway can determine the current tunnel information according to the information carried in the downlink data packet. In this way, when the edge gateway receives the downlink data packet from the local server, it can encapsulate and send the downlink data packet from the local server in a more timely manner according to the current tunnel information.
  • the second network device can obtain the current tunnel information and create it based on the current tunnel information.
  • the downlink data packet corresponding to the tunnel information carries address information that can be correctly returned to the terminal.
  • the second network device may also determine the session information corresponding to the tunnel information; when the session information meets the edge forwarding condition, trigger Perform the step of sending the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the edge gateway when the session information corresponding to the tunnel information meets the edge forwarding conditions, there is a high probability that the downlink data packet corresponding to the tunnel information that has changed will be returned from the local network, or the edge gateway will receive the change.
  • the downlink data packet corresponding to the tunnel information (from the local network).
  • the downlink data packet (from the core network or the Internet) corresponding to the changed tunnel information is sent to the edge gateway, which is helpful for the edge gateway to determine the current tunnel information, so that the downlink data packet returned from the local network can be Return the terminal device correctly.
  • the session information and edge forwarding conditions can be referred to the descriptions in the embodiments of Figures 2 to 3a, and will not be repeated here.
  • the downlink data packet may not be sent to the edge gateway.
  • the downlink data packet corresponding to the tunnel information is sent to the edge gateway.
  • FIG. 5 is a schematic flowchart of another data transmission method provided by an embodiment of the present application.
  • the method describes in detail how the second network device modifies the address information of a downlink data packet so that the downlink data packet can pass through the edge. Gateway.
  • the execution subject of step S501 to step S505 is the second network device, or the chip in the second network device, and the following description will be made by taking the second network device as the execution subject of the data transmission method as an example.
  • the method may include but is not limited to the following steps:
  • Step S501 The second network device receives a downlink data packet from a core network element.
  • Step S502 The second network device determines that the current tunnel information is different from the historical tunnel information; the tunnel information is tunnel information between the core network element and the access network device.
  • step S501 to step S502 refer to the specific description of step S401 to step S402 in FIG. 4, which will not be repeated here.
  • Step S503 The second network device obtains the address information of the edge gateway.
  • Step S504 The second network device modifies the destination address information of the downlink data packet to the address information of the edge gateway.
  • the address information of the edge gateway may be an IPV4 address or an IPV6 address.
  • Step S505 The second network device sends the downlink data packet to the edge gateway according to the destination address information of the modified downlink data packet.
  • the downlink data packet corresponding to the changed tunnel information may be the first n downlink data packets in the downlink data stream.
  • the second network device may send the first n received downlink data packets to the edge gateway. This helps to ensure that the edge gateway can learn the current tunnel information according to the received n downlink data packets, thereby helping to improve the success rate of the downlink data packets from the local server returning to the terminal device.
  • n can be greater than or equal to 1.
  • the larger n is, it can better ensure that the edge gateway can learn the current tunnel information according to the received n downlink data packets.
  • the second network device may send the first n downlink data packets received first to the edge gateway according to the order of reception.
  • the second network device may send the first n downlink data packets with a smaller transmission control protocol (TCP) sequence number in the downlink data stream to the edge gateway.
  • TCP transmission control protocol
  • the TCP sequence number is the sequence number in the TCP header, and the sequence number is used to identify the position of the downlink data packet in the downlink data stream to which it belongs.
  • the second network device after determining that the tunnel information corresponding to the received downlink data packet has changed, the second network device sends the first n downlink data packets to the edge gateway, and then responds to the subsequent received downlink data packets. , Can return to the terminal device according to the address information carried in the downlink data packet itself. This can avoid continuing to send downlink data packets to the edge gateway when the edge gateway has successfully learned the current tunnel information. It can also reduce the data traffic processed by the edge gateway. On the other hand, returning to the terminal device according to the address information carried by the downlink data packet itself can avoid extending the path that the downlink data packet travels before returning to the terminal device.
  • step S503 to step S505 please refer to the specific description of step S303 to step S305 in FIG. 3a, which will not be repeated here.
  • the destination address information of the downlink data packet is modified to the address information of the edge gateway, so that the downlink data packet can be sent to the edge gateway according to the destination address information of the modified downlink data packet. It is beneficial to improve the success rate of the downlink data packet from the local server returning to the terminal device.
  • the data transmission method described in the foregoing Figure 2- Figure 5 embodiments can be applied to different network architectures, for example, the 4th generation mobile communication technology (4G) long term evolution (LTE)
  • 4G long term evolution
  • LTE long term evolution
  • the core network of LTE is an evolved packet core network (EPC) or EPC+.
  • EPC+ network can support both 4G and 5G non-standalone (NSA).
  • the EPC network (or EPC+ network) may be a network architecture in which a control plane and a forwarding plane (control plane and user plane, CU) are separated or a CU integrated network architecture.
  • the EPC network may include, but is not limited to, the following network elements: mobility management entity (MME), serving gateway (serving gateway, SGW), and packet data network gateway (packet data network gateway, PGW).
  • MME mobility management entity
  • SGW serving gateway
  • PGW packet data network gateway
  • PGW packet data network gateway
  • the 5GC network may include, but is not limited to, the following network elements: user plane function (UPF), service management function (SMF), and access management function (AMF).
  • UPF user plane function
  • SMF service management function
  • AMF access management function
  • SGW can be divided into user plane service gateway (serving gateway for user plane, SGW-U) and control plane service gateway (serving gateway for control plane, SGW-C)
  • PGW can be divided into user plane Packet data network gateway (packet data network gateway for user plane, PGW-U) and control plane packet data network gateway (packet data network gateway for control plane, PGW-C).
  • base station a and base station b are configured to perform the corresponding functions of the first network device in the methods described in FIGS. 2 to 3a.
  • the SGW-U is configured to perform the corresponding functions of the second network device in the methods described in FIGS. 4 to 5.
  • Both base station a and base station b are in the service area of the edge gateway, that is, the edge forwarding device identifier includes at least the identifier of base station a and the identifier of base station b.
  • Data packet 1 is an uplink data packet
  • data packet 2 and data packet 3 are both downlink data packets.
  • terminal a can send data packet 1 to base station a.
  • the base station can determine the session information corresponding to data packet 1 (such as session type and terminal a corresponding Base station (i.e., the identity of base station a)). Since the edge forwarding device identifier includes the identifier of base station a, if the session type of the data packet 1 is the edge forwarding session type, it can be determined that the session information corresponding to the data packet 1 meets the edge forwarding condition. Further, the base station a may send the data packet 1 to the edge gateway. After receiving the data packet 1, the edge gateway can strip the GTPU header of the data packet 1, and send the data packet 1 with the GTPU header stripped to the local network.
  • the base station a may send the data packet 1 to the edge gateway by modifying the destination address of the data packet 1 to the IPv6 address of the edge gateway.
  • the IPv6 address of the edge gateway can be sent by the MME to the base station a.
  • SGW-C can extend the information element to Send the information carrying the IPv6 address of the edge gateway to the MME.
  • SGW-C can send information carrying the IPv6 address of the edge gateway to the MME .
  • Figure 6a shows that when terminal a moves from the coverage area of base station a to the coverage area of base station b, SGW-C can send current tunnel information to SGW-U.
  • SGW-U receives the current tunnel information, it can determine that the tunnel information has changed. Then, the SGW-U can generate data packet 2 according to the current tunnel information, and send the data packet 2 to the edge gateway.
  • the edge gateway After receiving the data packet 2, the edge gateway can extract the address information carried in the data packet 2 to learn the current tunnel information.
  • the tunnel corresponding to the tunnel information can be used to transmit the downlink data packet corresponding to data packet 1 (that is, data packet 3 in FIG. 6a).
  • the edge gateway When the edge gateway receives the data packet 3 from the local network, it can correctly send the data packet 3 to the base station b according to the current tunnel information learned, so that the terminal a can successfully obtain the downlink data packet corresponding to the data packet 1 ( That is data packet 3).
  • the SGW-U can generate n data packets 3 and send all n data packets 3 to the edge gateway to ensure that the edge gateway can successfully learn the current tunnel information. It should also be noted that FIG. 6a takes the absence of a data packet from the Internet as an example for description, and does not constitute a limitation to the embodiment of the present application. If there are data packets from the Internet, the SGW-U can send the first n data packets from the Internet to the edge gateway. It should be noted that data packets from the Internet can reach SGW-U through PGW-U. Among them, PGW is the border gateway of the EPC network, PGW-U can be used to process user plane data, and PGW-C can be used to process control plane data.
  • the functions of the network elements in FIG. 6c are basically the same as those in FIG. 6a. The differences are as follows: First, the UPF or SGW-U is configured to perform the corresponding function of the second network device in the methods described in FIGS. 4 to 5. Second, the IPv6 address of the edge gateway is sent to the AMF by the SMF, and then the AMF sends the IPv6 address of the edge gateway to the base station a. Alternatively, the IPv6 address of the edge gateway may be sent by the MME to the base station a. Third, the current tunnel information is notified to the UPF by the SMF, or the current tunnel information is sent by the SGW-C to the SGW-U.
  • SA 5G standalone
  • FIG. 7 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application.
  • the device may be a first network device or a device (such as a chip) with the function of the first network device.
  • the data transmission device 70 is used for In performing the steps performed by the first network device in the method embodiment corresponding to FIG. 2 to FIG. 3a, the data transmission device 70 includes:
  • the communication module 701 is configured to receive an uplink data packet from a terminal device
  • the processing module 702 is configured to determine the session information corresponding to the uplink data packet
  • the communication module 701 is further configured to send the uplink data packet to the edge gateway when the session information corresponding to the uplink data packet meets the edge forwarding condition.
  • the session information may include the session type, and the edge forwarding condition may include one or more edge forwarding session types; the session information meeting the edge forwarding condition may include that the session type corresponding to the uplink data packet is the same as the edge forwarding session type .
  • the session information may include the identifier and session type of the access network device corresponding to the terminal device;
  • the communication module 701 can also be used to obtain the address information of the edge gateway; the processing module 702 can also be used to modify the destination address information of the uplink data packet to the address information of the edge gateway; the communication module 701 is used to When the uplink data packet is sent to the edge gateway, it can be specifically used to send the uplink data packet to the edge gateway according to the destination address information of the modified uplink data packet.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the communication module 701 may also be used to send the uplink data packet to the core network element when the session information corresponding to the uplink data packet does not meet the edge forwarding condition.
  • FIG. 8 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.
  • the device may be a first network device or a device (such as a chip) with the function of the first network device.
  • the data transmission device 80 It may include a communication interface 801, a processor 802, and a memory 803.
  • the communication interface 801, the processor 802, and the memory 803 may be connected to each other through one or more communication buses, or may be connected in other ways.
  • the related functions implemented by the communication module 701 and the processing module 702 shown in FIG. 7 may be implemented by the same processor 802, or may be implemented by multiple different processors 802.
  • the communication interface 801 may be used to send data and/or signaling, and receive data and/or signaling.
  • the communication interface 801 may be used to receive uplink data packets from a terminal device, and the communication interface 801 may be a transceiver.
  • the processor 802 is configured to perform corresponding functions of the first network device in the methods described in FIGS. 2 to 3a.
  • the processor 802 may include one or more processors.
  • the processor 802 may be one or more central processing units (CPU), network processors (network processors, NPs), hardware chips, or any of them. combination.
  • the processor 802 is a CPU
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the memory 803 is used to store program codes and the like.
  • the memory 803 may include a volatile memory (volatile memory), such as a random access memory (random access memory, RAM); the memory 803 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read-only memory). Only memory (ROM), flash memory (flash memory), hard disk drive (HDD), or solid-state drive (SSD); the memory 803 may also include a combination of the foregoing types of memories.
  • the data transmission device 80 includes the memory 803 for example only, and does not constitute a limitation to the embodiment of the present application. In an implementation manner, the memory 803 can be replaced by other storage media with storage functions.
  • the processor 802 may call the program code stored in the memory 803 to cause the data transmission device 80 to perform the following operations:
  • the uplink data packet is sent to the edge gateway.
  • the session information may include the session type, and the edge forwarding condition may include one or more edge forwarding session types; the session information meeting the edge forwarding condition may include that the session type corresponding to the uplink data packet is the same as the edge forwarding session type .
  • the session information may include the identifier and session type of the access network device corresponding to the terminal device;
  • the processor 802 may also call the program code stored in the memory 803 to make the data transmission device 80 perform the following operations: obtain the address information of the edge gateway, and transfer the uplink data The destination address information of the packet is modified to the address information of the edge gateway; when the processor 802 calls the program code stored in the memory 803 to make the data transmission device 80 execute and send the uplink data packet to the edge gateway, it can specifically make the data transmission device 80 execute the following Operation: Send the uplink data packet to the edge gateway according to the destination address information of the modified uplink data packet.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the processor 802 may also call the program code stored in the memory 803 to cause the data transmission device 80 to perform the following operations: in the case that the session information corresponding to the uplink data packet does not meet the edge forwarding condition, the uplink The data packet is sent to the core network element.
  • the processor 802 may also call the program code stored in the memory 803 to make the data transmission device 80 execute the operation corresponding to the first network device in the embodiment shown in FIG. 2 to FIG. 3a.
  • the processor 802 may also call the program code stored in the memory 803 to make the data transmission device 80 execute the operation corresponding to the first network device in the embodiment shown in FIG. 2 to FIG. 3a.
  • FIG. 9 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.
  • the device may be a second network device or a device (such as a chip) with the function of a second network device.
  • the data transmission device 90 For performing the steps performed by the second network device in the method embodiment corresponding to FIG. 4 to FIG. 5, the data transmission device 90 may include:
  • the processing module 901 is configured to determine that the current tunnel information is different from the historical tunnel information; the tunnel information is tunnel information between the core network element and the access network device;
  • the communication module 902 is configured to send the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the processing module 901 may also be used to generate a downlink data packet.
  • the communication module 902 may also be used to receive a downlink data packet from a core network element.
  • the downlink data packet may be the first n downlink data packets in the downlink data stream; where n may be a positive integer.
  • the communication module 902 can also be used to obtain the address information of the edge gateway; the processing module 901 can also be used to modify the destination address information of the downlink data packet to the address information of the edge gateway; the communication module 902 is used to When sending the downlink data packet corresponding to the tunnel information to the edge gateway, it can be specifically used to send the downlink data packet to the edge gateway according to the destination address information of the modified downlink data packet.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the processing module 901 may also be used to determine the session information corresponding to the tunnel information; when the session information meets the edge forwarding condition, trigger the execution of the step of sending the downlink data packet corresponding to the tunnel information to the edge gateway .
  • FIG. 10 is a schematic structural diagram of another data transmission device provided by an embodiment of the present application.
  • the device may be a second network device or a device (such as a chip) with the function of a second network device.
  • the data transmission device 100 It may include a communication interface 1001, a processor 1002, and a memory 1003.
  • the communication interface 1001, the processor 1002, and the memory 1003 may be connected to each other through one or more communication buses, or may be connected in other ways.
  • the related functions implemented by the processing module 901 and the communication module 902 shown in FIG. 9 may be implemented by the same processor 1002, or may be implemented by multiple different processors 1002.
  • the communication interface 1001 may be used to send data and/or signaling, and receive data and/or signaling. In the embodiment of the present application, the communication interface 1001 may be used to send the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the communication interface 1001 may be a transceiver.
  • the processor 1002 is configured to perform corresponding functions of the second network device in the methods described in FIGS. 4 to 5.
  • the processor 1002 may include one or more processors.
  • the processor 1002 may be one or more central processing units (CPUs), network processors (NPs), hardware chips, or any of them. combination.
  • the processor 1002 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the memory 1003 is used to store program codes and the like.
  • the memory 1003 may include a volatile memory (volatile memory), such as a random access memory (random access memory, RAM); the memory 1003 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read-only memory). Only memory (ROM), flash memory (flash memory), hard disk drive (HDD), or solid-state drive (SSD); the memory 1003 may also include a combination of the foregoing types of memories.
  • ROM read-only memory
  • flash memory flash memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 1003 may also include a combination of the foregoing types of memories.
  • the data transmission device 100 including the memory 1003 is only used as an example, and does not constitute a limitation to the embodiment of the present application. In an implementation manner, the memory 1003 can be replaced by other storage media with storage functions.
  • the processor 1002 may call the program code stored in the memory 1003 to make the data transmission apparatus 100 perform the following operations:
  • the tunnel information is the tunnel information between the core network element and the access network device;
  • the processor 1002 may also call the program code stored in the memory 1003 to cause the data transmission device 100 to perform the following operations: generate a downlink data packet.
  • the processor 1002 may also call the program code stored in the memory 1003 to cause the data transmission apparatus 100 to perform the following operations: receiving a downlink data packet from a core network element.
  • the downlink data packet may be the first n downlink data packets in the downlink data stream; where n may be a positive integer.
  • the processor 1002 may also call the program code stored in the memory 1003 to make the data transmission apparatus 100 perform the following operations: obtain address information of the edge gateway Modify the destination address information of the downlink data packet to the address information of the edge gateway; when the processor 1002 calls the program code stored in the memory 1003 to make the data transmission device 100 execute the downlink data packet corresponding to the tunnel information to the edge gateway, Specifically, the data transmission apparatus 100 may perform the following operations: according to the modified destination address information of the downlink data packet, the downlink data packet is sent to the edge gateway.
  • the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.
  • the processor 1002 may also call the program code stored in the memory 1003 to cause the data transmission device 100 to perform the following operations: determine the session information corresponding to the tunnel information; in the case that the session information meets the edge forwarding condition, Trigger the execution of the step of sending the downlink data packet corresponding to the tunnel information to the edge gateway.
  • the processor 1002 may also call the program code stored in the memory 1003 to make the data transmission apparatus 100 execute the operation corresponding to the second network device in the embodiment shown in FIG. 4 to FIG. 5.
  • the processor 1002 may also call the program code stored in the memory 1003 to make the data transmission apparatus 100 execute the operation corresponding to the second network device in the embodiment shown in FIG. 4 to FIG. 5.
  • An embodiment of the present application also provides a data transmission system, which includes the aforementioned data transmission device as shown in FIG. 7, the aforementioned data transmission device and edge gateway as shown in FIG. 8, or the data transmission system includes the aforementioned The data transmission device shown in FIG. 9 and the aforementioned data transmission device and edge gateway shown in FIG. 10.
  • the embodiment of the present application also provides a computer-readable storage medium, which can be used to store the computer software instructions used by the data transmission device in the embodiment shown in FIG. program of.
  • the embodiment of the present application also provides a computer-readable storage medium, which can be used to store the computer software instructions used by the data transmission device in the embodiment shown in FIG. program of.
  • the above-mentioned computer-readable storage medium includes, but is not limited to, flash memory, hard disk, and solid-state hard disk.
  • the embodiment of the present application also provides a computer program product.
  • the computer product When the computer product is run by a computing device, it can execute the method designed for the first network device in the above-mentioned embodiments of FIG. 2 to FIG. 3a.
  • the embodiments of the present application also provide a computer program product.
  • the computer product When the computer product is run by a computing device, it can execute the method designed for the second network device in the above-mentioned embodiments of FIG. 4 to FIG. 5.
  • a chip including a processor and a memory.
  • the memory includes a processor and a memory.
  • the memory is used to store a computer program.
  • the processor is used to call and run the computer program from the memory.
  • the computer program is used to implement the method in the above method embodiment.
  • the foregoing embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer instructions When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the above-mentioned computer instructions may be stored in a computer-readable storage medium or transmitted through a computer-readable storage medium.
  • the above computer instructions can be sent from one website site, computer, server, or data center to another website site, through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) Computer, server or data center for transmission.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

L'invention concerne un procédé de transmission de données et un appareil pour cela. Le procédé peut être appliqué à un scénario dans lequel une dérivation locale est prise en charge. Le procédé comprend les étapes suivantes : recevoir un paquet de données de liaison montante en provenance d'un dispositif terminal, et déterminer des informations de session correspondant au paquet de données de liaison montante ; et lorsque les informations de session correspondant au paquet de données de liaison montante respectent une condition de réacheminement vers la périphérie, envoyer le paquet de données de liaison montante à une passerelle de périphérie. La mise en œuvre des modes de réalisation de la présente invention facilite la réduction du trafic de données traité par une passerelle de périphérie.
PCT/CN2020/131579 2019-11-26 2020-11-25 Procédé de transmission de données, et appareil pour cela WO2021104335A1 (fr)

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