WO2021104335A1

WO2021104335A1 - Data transmission method and apparatus therefor

Info

Publication number: WO2021104335A1
Application number: PCT/CN2020/131579
Authority: WO
Inventors: 周军平; 屈琴; 郝文杰
Original assignee: 华为技术有限公司
Priority date: 2019-11-26
Filing date: 2020-11-25
Publication date: 2021-06-03
Also published as: CN112953843A; CN112953843B

Abstract

Disclosed are a data transmission method and an apparatus therefor. The method can be applied to a scenario in which local breakout is supported. The method comprises: receiving an uplink data packet from a terminal device, and determining session information corresponding to the uplink data packet; and when the session information corresponding to the uplink data packet meets an edge forwarding condition, sending the uplink data packet to an edge gateway. The implementation of the embodiments of the present application facilitates reducing data traffic processed by an edge gateway.

Description

Data transmission method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 26, 2019, the application number is 201911180038.0, and the application name is "a data transmission method and device", the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of Internet technology, and in particular to a data transmission method and device.

Background technique

The current network is a convergent network. Under the current network, when the terminal accesses data, it passes through the centralized deployment gateway. With the development of virtualization technology and distributed cloud technology, in the future mobile networks will deploy 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.

Taking the network architecture diagram shown in Figure 1a as an example, when the cell site gateway (CSG)/access gateway (ASG) receives the data sent by the base station, it will take all the data from the base station All are sent to the MEC gateway. 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.

Summary of the invention

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.

In the first aspect, 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.

In this technical solution, when the session information corresponding to the uplink data packet meets the edge forwarding condition, 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.

In an implementation manner, 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 .

In this technical solution, it is beneficial to reduce the data traffic processed by the edge gateway and reduce the load of the edge gateway.

In an implementation manner, the session information may include the identifier and session type of the access network device corresponding to the terminal device; the edge forwarding condition may include one or more edge forwarding device identifiers and one or more edge forwarding session types; session information Satisfying the edge forwarding condition may include: the identifier of the access network device is the same as the edge forwarding device identifier, and the session type corresponding to the uplink data packet is the same as the edge forwarding session type.

In an implementation manner, 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.

In this technical solution, by modifying the destination address information of the uplink data packet to the address information of the edge gateway, 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.

In an implementation manner, the address information of the edge gateway may include the IPV6 address of Internet Protocol version 6.

In an implementation manner, 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.

In this technical solution, when the session information corresponding to the uplink data packet does not meet the edge forwarding condition, 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.

In the second aspect, 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.

In this technical solution, when the tunnel information changes, the downlink data packet corresponding to the changed tunnel information is sent 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.

In an implementation manner, the method may further include: generating a downlink data packet.

In this technical solution, by self-generating downlink data packets, it is possible to avoid the situation that there is no downlink data packet from the Internet, which causes 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. Success rate.

In an implementation manner, the method may further include: receiving a downlink data packet from a core network element.

In an implementation manner, the downlink data packet may be the first n downlink data packets in the downlink data stream; where n may be a positive integer.

In this technical solution, it is helpful 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.

In an implementation manner, 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.

In this technical solution, by modifying the destination address information of the downlink data packet to the address information of the edge gateway, 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.

In an implementation manner, 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.

In this technical solution, when the session information corresponding to the tunnel information meets the edge forwarding condition, the downlink data packet corresponding to the tunnel information is sent to the edge gateway. On the one hand, it is beneficial to the correct downlink data packet returned from the local network. Return to the terminal device; on the other hand, 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.

In a third aspect, 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.

In a fourth aspect, 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.

In a fifth aspect, 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.

In a sixth 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.

In a seventh 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.

In an eighth 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.

In a ninth 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 fourth aspect, which includes instructions for executing the method of the second aspect. program.

In a tenth aspect, an embodiment of the present application provides a computer program product. The program product includes a program. When the program is executed by a data transmission device, the device implements the method described in the first aspect.

In an eleventh aspect, an embodiment of the present application provides a computer program product. The program product includes a program. When the program is executed by a data transmission device, the device implements the method described in the second aspect.

Description of the drawings

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;

4 is a schematic flowchart of another data transmission method 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.

Detailed ways

In order to better understand a data transmission method disclosed in the embodiment of the present application, the following first describes the communication system to which the embodiment of the present application is applicable.

Please refer to FIG. 1b, which is a schematic diagram of the architecture of a communication system disclosed in an embodiment of the present application. As shown in Figure 1b, 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. In the embodiment of the present application, 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. For example, the first network device may be an access network device (such as a base station). In an implementation manner, the first network device may also be a device located behind the base station (not shown in FIG. 1b) in the uplink direction. For example, 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. Specifically, 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.

It is understandable that the communication system described in the embodiments of the present application is to illustrate the technical solutions of the embodiments of the present application more clearly, and does not constitute a limitation to the technical solutions provided in the embodiments of the present application. Those skilled in the art will know that as the system With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The data transmission method and data transmission device provided by the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 2, which 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. Among them, the execution subject of step S201 to step S203 is the first network device, or the chip in the first network device, and the execution subject of step S204 is the edge gateway or the chip in the edge gateway. Hereinafter, the first network device, The edge gateway is the execution subject of the data transmission method as an example for description. As shown in Figure 2, 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.

Specifically, 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. 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. Specifically, the terminal equipment may be user equipment (UE), remote terminal, mobile terminal, wireless communication equipment, user equipment, and so on. Among them, 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.

Specifically, 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.

In an implementation manner, the first information may be the source Internet Protocol (IP) address carried in the uplink data packet. 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.

In an implementation manner, 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). 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. 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. Wherein, the number of the first base station may be one or more.

It should be noted that 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. Specifically, 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. The embodiment of the application does not limit this.

Step S203: the first network device sends the uplink data packet to the edge gateway when the session information meets the edge forwarding condition.

In an implementation manner, the session information may include a session type, sessions with different session types may be used to transmit different types of data, and sessions with the same session type may be used to transmit the same type of data. For example, when a terminal requests video application data and instant messaging application 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. In other words, the type of service requested by the uplink data packet can be determined by the session type corresponding to the uplink data packet.

In an implementation manner, 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.

In an implementation manner, for signaling plane data packets that do not need to be locally offloaded, the session type is not the edge forwarding session type. For long-term evolution voice bearer (voice over long-term evolution, VoLTE) services or data packets of other timely communication services that do not require local offloading, 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.

In the embodiment of the present application, if 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. Compared with sending the uplink data packet to the core network to obtain the data requested by the uplink data packet, by sending the uplink data packet to the local network to obtain the data requested by the uplink data packet, 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.

In an implementation manner, 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. Wherein, the access network device corresponding to the terminal device may be the base station where the terminal device currently resides.

In actual situations, 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.

In one implementation, 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. In an implementation manner, 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.

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.

In this way, when the ID of the access network device corresponding to the terminal device is not the edge forwarding device ID, that is, when the access network device is located outside the service area of the edge gateway, 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.

In an implementation manner, the first network device may set the edge forwarding condition by default, or set and change the edge forwarding condition according to user operations.

In an implementation manner, in the case that the session information corresponding to the uplink data packet does not meet the edge forwarding condition, 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.

Specifically, after the edge gateway receives the uplink data packet, it 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. In order to obtain the data requested by the uplink data packet from the local server (ie, the local network).

In the embodiment of the present application, when the session information corresponding to the uplink data packet meets the edge forwarding condition, 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.

Please refer to Figure 3a, which 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. Among them, 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. Hereinafter, 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 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.

It should be noted that, for the execution process of 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.

Specifically, in the case that the session information corresponding to the uplink data packet satisfies 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.

In an implementation manner, 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.

Among them, 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. Correspondingly, the address information in the embodiment of the present application may include an IPv4 address or an IPv6 address.

In an implementation manner, when the uplink data packet is an IPv6 data packet, the header of the uplink data packet may include an IPv6 standard header and a segment routing header (segment routing header, SRH). On the way to the destination address of the IPv6 data packet, the address of the intermediate node that must pass through can be specified through the SRH extension header.

Take the schematic diagram of the SRH extension header in the IPv6 packet header shown in FIG. 3b as an example. In Figure 3b, 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. Tag: Identifies the same group of data packets. 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 process of specifying the address of the intermediate node that must pass through the SRH extension header is as follows: For example, if an IPv6 packet is sent from the source address E1::1 to the destination address A3::1, when specifying that the address must pass through the A2::1 address in the middle, if this When the data packet is sent from the source address, the destination address of the data packet is A2::1, and the data packet carries an extension header. If SL[0]=A3::1, SL[1]=A2::1, SegmentsLeft=1 in the extension header, then after the packet reaches A2::1, the intermediate routing device can update the destination address to A3::1, and update SegmentsLeft in the extension header to 0. Then continue to query the route and send it to the destination address A3::1.

In the embodiment of the present application, when the uplink data packet is an IPv6 data packet and the header of the uplink data packet includes the SRH extension header, the first network device may modify the destination address of the uplink data packet to the IPv6 address of the edge gateway. Optionally, 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.

Specifically, 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.

It should be noted that, for the execution process of step S306, refer to the specific description of step S204 in FIG. 2, which will not be repeated here.

In the embodiment of the present application, by modifying the destination address information of the uplink data packet to the address information of the edge gateway, 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.

Please refer to FIG. 4, which 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. Wherein, 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, and the tunnel corresponding to TEIDC can be used to transmit control plane data.

In one implementation, the core network can store tunnel information of all GTPU tunnels. When any tunnel information changes, 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. In an implementation manner, both the core network and the second network device may store tunnel information of all GTPU tunnels. When any tunnel information changes, 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.

In the embodiment of the present application, 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.

Specifically, when the tunnel information changes, the second network device may send the downlink data packet corresponding to the changed tunnel information to the edge gateway. After receiving the downlink data packet, 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.

In the embodiment of the application, 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.

In an implementation manner, when the tunnel information changes, 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.

Since 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. Correspondingly, 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. At this time, 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.

In the embodiment of the present application, 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.

In one implementation, after the second network device determines that the tunnel information has changed, if the downlink data packet corresponding to the tunnel information is not received, 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. The downlink data packet created in this way carries address information that can be correctly returned to the terminal.

In an implementation manner, before sending the downlink data packet corresponding to the tunnel information to the edge gateway, 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.

Specifically, 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). In this case, 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. It should be noted that 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.

In an implementation manner, if all the uplink data packets from the first terminal device are sent to the core network, but not sent to the local network. Then there will be no downlink data packet corresponding to the uplink data packet returned from the local network. Since the data packet returned from the core network can be correctly returned to the first terminal device without being forwarded to the edge gateway, in this case, the downlink data packet may not be sent to the edge gateway.

When the session information corresponding to the tunnel information satisfies the edge forwarding condition, the downlink data packet corresponding to the tunnel information is sent to the edge gateway. On the one hand, it is helpful for the downlink data packet returned from the local network to correctly return to the terminal device; on the other hand, On the one hand, 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 condition, which is beneficial to reduce the data traffic processed by the edge gateway.

By implementing the embodiments of the present application, it is beneficial to improve the success rate of the downlink data packets from the local server returning to the terminal device.

Please refer to FIG. 5. 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. Wherein, 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.

It should be noted that, for the execution process of 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.

In an implementation manner, 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.

In an implementation manner, the downlink data packet corresponding to the changed tunnel information may be the first n downlink data packets in the downlink data stream. In other words, when it is determined that the tunnel information corresponding to the received downlink data packet has changed, 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. Among them, n can be greater than or equal to 1. In an implementation manner, 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. In an implementation manner, the second network device may send the first n downlink data packets received first to the edge gateway according to the order of reception. Alternatively, 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. Among them, 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.

In an implementation manner, 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.

It should be noted that the execution process of the second network device modifying the destination address information of the downlink data packet according to the address information of the edge gateway is the same as the execution process of the first network device modifying the destination address information of the uplink data packet according to the address information of the edge gateway . That is, for the execution process of 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.

In the embodiment of the present application, 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) The network architecture of the core network, 5G core network (5G core network, 5GC) or other networks. The core network of LTE is an evolved packet core network (EPC) or EPC+. The EPC+ network can support both 4G and 5G non-standalone (NSA). Among them, 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 (or 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). 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). Under the separated network architecture of CU, 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).

The following exemplarily describes the case where the foregoing data transmission methods are respectively applied to the network architectures shown in FIG. 6a, FIG. 6b, and FIG. 6c.

In the network architecture with separated CUs shown in FIG. 6a, 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, and data packet 2 and data packet 3 are both downlink data packets.

1) In the uplink direction: As shown in Figure 6a, terminal a can send data packet 1 to base station a. After receiving data packet 1, 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.

Specifically, 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. In the network architecture shown in FIG. 6a, the IPv6 address of the edge gateway can be sent by the MME to the base station a. In one implementation, when terminal a is activated in base station a (such as powering on), or when terminal a moves from outside the coverage area of base station a to the coverage area of 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. In other words, when terminal a is activated in the service area of the edge gateway, or when terminal a moves from outside the service area of the edge gateway to the service area of the edge gateway, SGW-C can send information carrying the IPv6 address of the edge gateway to the MME .

2) In the downlink direction: 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. When the 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. 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. Wherein, 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). 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).

It should be noted that 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.

In the CU-in-one network architecture shown in Figure 6b, except that the IPv6 address of the edge gateway is sent to the MME by the SGW, the current tunnel information is determined by the SGW itself, and the SGW is configured to perform the second method described in Figure 4 to Figure 5. Except for the corresponding functions of the network equipment, the functions of the other network elements are consistent with those of Fig. 6a. I won't repeat them here.

In the 5G standalone (SA) network architecture shown in FIG. 6c, 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.

The foregoing details the method disclosed in the embodiment of the present application, and the device of the embodiment of the present application will be provided below.

Please refer to FIG. 7, which 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.

In an implementation manner, 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.

In an implementation manner, 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.

It should be noted that the content not mentioned in the embodiment corresponding to FIG. 7 and the specific implementation manner of the execution steps of each module can be referred to the embodiment shown in FIG. 2-FIG. 3a and the foregoing content, which will not be repeated here.

In an implementation manner, the related functions implemented by each module in FIG. 7 can be implemented in combination with a processor and a communication interface. Referring to FIG. 8, 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. In the embodiment of the present application, 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. For example, the processor 802 may be one or more central processing units (CPU), network processors (network processors, NPs), hardware chips, or any of them. combination. In the case where 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. It should be noted that 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:

Receiving an uplink data packet from a terminal device, and determining the session information corresponding to the uplink data packet;

When the session information corresponding to the uplink data packet meets the edge forwarding condition, the uplink data packet is sent to the edge gateway.

In one implementation, before sending the uplink data packet to the edge gateway, 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.

In an implementation manner, 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.

Further, 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. For details, please refer to the description in the method embodiment , I won’t repeat it here.

Please refer to FIG. 9, which 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.

In an implementation manner, the processing module 901 may also be used to generate a downlink data packet.

In an implementation manner, the communication module 902 may also be used to receive a downlink data packet from a core network element.

In an implementation manner, 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.

In an implementation manner, 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 .

It should be noted that the content not mentioned in the embodiment corresponding to FIG. 9 and the specific implementation manners of the execution steps of each module can be referred to the embodiment shown in FIG. 4 to FIG. 5 and the foregoing content, which will not be repeated here.

In an implementation manner, the related functions implemented by each module in FIG. 9 can be implemented in combination with a processor and a communication interface. Referring to FIG. 10, 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. For example, the processor 1002 may be one or more central processing units (CPUs), network processors (NPs), hardware chips, or any of them. combination. In the case where 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. It should be noted that 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:

Determine 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.

In an implementation manner, 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.

In an implementation manner, 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.

In an implementation manner, before 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 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.

In an implementation manner, 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.

Further, 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. For details, please refer to the description in the method embodiment , I won’t repeat it here.

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 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. 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. 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.

In the embodiment of the present application, there is also provided 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.

Those skilled in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed in the present application can be implemented in a manner of electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The foregoing embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. 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. 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)).

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. All should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A data transmission method, characterized in that the method includes:

Receiving an uplink data packet from a terminal device, and determining session information corresponding to the uplink data packet;

When the session information meets the edge forwarding condition, the uplink data packet is sent to the edge gateway.
The method according to claim 1, wherein the session information includes a session type, the edge forwarding condition includes one or more edge forwarding session types; and the session information that satisfies the edge forwarding condition includes the session type and The edge forwarding session types are the same.
The method according to claim 1, wherein the session information includes the identifier and the session type of the access network device corresponding to the terminal device; the edge forwarding condition includes one or more edge forwarding device identifiers and one Or multiple edge forwarding session types; the session information meeting the edge forwarding condition includes that the identifier of the access network device is the same as the edge forwarding device identifier, and the session type is the same as the edge forwarding session type.
The method according to any one of claims 1 to 3, wherein before the sending the uplink data packet to the edge gateway, the method further comprises:

Acquiring address information of the edge gateway;

Modify the destination address information of the uplink data packet to the address information of the edge gateway;

The sending the uplink data packet to the edge gateway includes:

Send the uplink data packet to the edge gateway according to the modified destination address information of the uplink data packet.
The method according to claim 4, wherein the address information of the edge gateway includes an IPV6 address of Internet Protocol version 6.
The method according to any one of claims 1 to 5, wherein the method further comprises:

In a case where the session information does not satisfy the edge forwarding condition, the uplink data packet is sent to the core network element.
A data transmission method, characterized in that the method includes:

Determining 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;

Send the downlink data packet corresponding to the tunnel information to the edge gateway.
The method according to claim 7, wherein the method further comprises:

Generating the downlink data packet.
The method according to claim 7, wherein the method further comprises:

Receiving the downlink data packet from the core network element.
The method according to claim 9, wherein the downlink data packet is the first n downlink data packets in the downlink data stream; wherein, n is a positive integer.
The method according to any one of claims 7 to 10, wherein before the sending the downlink data packet corresponding to the tunnel information to the edge gateway, the method further comprises:

Acquiring address information of the edge gateway;

Modify the destination address information of the downlink data packet to the address information of the edge gateway;

The sending the downlink data packet corresponding to the tunnel information to the edge gateway includes:

Send the downlink data packet to the edge gateway according to the modified destination address information of the downlink data packet.
The method according to claim 11, wherein the address information of the edge gateway includes an IPV6 address of Internet Protocol version 6.
The method according to any one of claims 7-12, wherein the method further comprises:

Determine the session information corresponding to the tunnel information;

When the session information meets the edge forwarding condition, trigger execution of the step of sending the downlink data packet corresponding to the tunnel information to the edge gateway.
A data transmission device, characterized by comprising a unit for executing the method according to any one of claims 1 to 6.
A data transmission device, characterized by comprising a unit for executing the method according to any one of claims 7-13.
A data transmission device, characterized in that it comprises a processor and a memory, the memory is stored with program instructions, and the processor calls the program instructions stored in the memory to make the data transmission device execute as claimed in claim 1. The method of any one of ~6.
A data transmission device, characterized by comprising a processor and a memory, and program instructions are stored in the memory, and the processor calls the program instructions stored in the memory to make the data transmission device execute as claimed in claim 7. The method of any one of ~13.
A data transmission system, characterized in that it comprises the data transmission device according to claim 14 and the data transmission device according to claim 15, or comprises the data transmission device according to claim 16 and the data transmission device according to claim 16. 17 said data transmission device.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the The method described in any one of 1 to 6.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the The method of any one of 7-13.