WO2020177642A1 - Ethernet message transmission method, apparatus, and system - Google Patents

Abstract

Embodiments of the present application provide an Ethernet message transmission method, apparatus, and system. The method comprises: a control device generating a first Ethernet message according to a first maximum transmission unit (MTU) length, wherein a length of a data field in the first Ethernet message is greater than a default MTU length of the control device but is not greater than the first MTU length; and the control device transmitting the first Ethernet message to a network device. The method can reduce IP packet header overhead and Ethernet frame header overhead.

Description

Method, device and system for transmitting Ethernet message

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910155606.5, and the application name is "A method, device and system for transmitting Ethernet messages" on March 1, 2019. The entire content of the application is approved The reference is incorporated in this application.

Technical field

This application relates to the field of wireless communication technology, and in particular to a method, device and system for transmitting Ethernet packets.

Background technique

With the development of mobile communication technology, mobile communication systems are gradually applied to data transmission on Ethernet. For example, in an industrial private network, the control device can use the mobile communication system to transmit Ethernet packets, and then realize data transmission.

Generally, an Ethernet message includes a data field and an Ethernet frame header. Among them, the data field includes an IP data packet encapsulated by an internet protocol (IP) header. In order to ensure that Ethernet packets can be transmitted in the Ethernet, the devices in the Ethernet are all configured with a default maximum transmission unit (MTU) length. Generally, the default MTU length is 1500 bytes (Bytes). When sending an Ethernet packet, an Ethernet device can send the Ethernet packet according to the default MTU length. For example, the length of the data field in the Ethernet packet cannot be greater than 1500 bytes.

It can be understood that the longer the data field in the Ethernet message, the less the Ethernet message needed to transmit the data to be transmitted, and the less the overhead of the IP header and the Ethernet frame header. In the existing Ethernet, the default MTU length limits the length of the data field in the Ethernet packet, so that any device in the Ethernet needs to send multiple Ethernet packets when sending data that exceeds the default MTU length. The text can complete the data transmission, which increases the overhead of the IP packet header and the Ethernet frame header.

Summary of the invention

The present application provides a method, device and system for transmitting Ethernet packets, which are used to reduce the overhead of IP packet headers and Ethernet frame headers.

In a first aspect, an embodiment of the present application provides an Ethernet packet transmission method, including: a control device generates a first Ethernet packet according to a first maximum transmission unit MTU length, and the length of the data field in the first Ethernet packet It is greater than the default MTU length of the control device and not greater than the first MTU length; further, the control device sends the aforementioned first Ethernet packet to the network device.

The length of the data field in the first Ethernet message sent by the control device is no longer limited to the default MTU length, and the first Ethernet message with the data field length greater than the default MTU length can be sent according to the first MTU length, so that as a whole Reduce the number of Ethernet packets, thereby reducing the overhead of IP packet headers and Ethernet frame headers.

In a possible implementation manner, before generating the first Ethernet packet according to the first MTU length, the control device may also receive the first information sent by the network device, and obtain the first MTU length according to the first information.

With the above method, the network device instructs the first MTU for the control device, so that the method for the control device to obtain the first MTU is more flexible and can be adjusted adaptively according to different terminal devices.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.

Since the first Ethernet packet sent by the control device needs to be transmitted to the terminal device via the network device, the first MTU can be determined by the above method so that the length of the data field in the first Ethernet packet sent by the control device does not exceed the terminal device The maximum data field length supported by the device and the network device helps to improve the success rate of the first Ethernet packet transmission.

In a possible implementation manner, after the control device obtains the first MTU length according to the first information, the method further includes: if the control device determines to support receiving an Ethernet packet with a data field length of the first MTU length, sending to the network device Second information, the second information is used to instruct the terminal device to send a second Ethernet packet according to the first MTU length; the control device receives the second Ethernet packet sent by the network device, and the second Ethernet packet is a network device The Ethernet packet received from the terminal device and sent by the terminal device according to the foregoing second information.

If the control device determines that it can receive an Ethernet packet whose data field size is the first MTU length, it can send second information to the terminal device so that the terminal device can also send a second Ethernet packet with a data field length greater than the default MTU. It is beneficial to reduce the IP header overhead and Ethernet frame header overhead at the terminal equipment.

In a possible implementation manner, before the control device sends the first Ethernet packet to the network device, it may also merge multiple segmented Ethernet packets into the first Ethernet packet.

In time-sensitive Ethernet, low-priority Ethernet packets may be divided into multiple segmented Ethernet packets to be sent separately, thus reducing wireless resource utilization and possibly increasing the overhead of the Ethernet frame header . Using the above method, the control device combines multiple segmented Ethernet messages into one Ethernet message before sending it, which is beneficial to improve the utilization rate of wireless resources and also helps to reduce the overhead of the Ethernet frame header.

In a second aspect, an embodiment of the present application provides an Ethernet packet transmission method, including: a terminal device receives a first Ethernet packet sent by a network device, and the first Ethernet packet is sent by a control device to the network device, An Ethernet packet whose data field length is greater than the default MTU length of the control device and not greater than the first MTU length; further, the terminal device processes the first Ethernet packet.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.

In a possible implementation, the terminal device may also receive the second information sent by the network device; obtain the first MTU length according to the second information; the terminal device may send the second Ethernet packet to the network device according to the first MTU length , The length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than the first MTU length.

In a possible implementation manner, before the terminal device sends the Ethernet packet to the network device according to the first MTU length, it may also merge multiple segmented Ethernet packets into a second Ethernet packet.

In a third aspect, an embodiment of the present application provides an Ethernet packet transmission method, including: a network device receives a first Ethernet packet sent by a control device, and the length of the data field in the first Ethernet packet is greater than that of the control device The default maximum transmission unit MTU length is not greater than the first MTU length; the network device then sends the first Ethernet packet to the terminal device.

In a possible implementation manner, before receiving the first Ethernet packet sent by the control device, the network device may also obtain the first MTU length, and send first information to the control device, where the first information is used to indicate the first Ethernet packet sent by the control device. One MTU length.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.

In a possible implementation manner, the network device may also receive the second information sent by the control device, and forward the second information to the terminal device. The second information is used to instruct the terminal device to send the second Ethernet according to the first MTU length. Network message; the network device receives the second Ethernet message sent by the terminal device, and the length of the data field in the second Ethernet message is greater than the default MTU length of the terminal device and not greater than the first MTU length.

In a possible implementation manner, before the network device sends the first Ethernet packet to the terminal device, it may also combine multiple segmented Ethernet packets into the foregoing first Ethernet packet.

In a fourth aspect, an embodiment of the present application provides an apparatus including: a processing unit and a communication unit; wherein the processing unit is configured to generate a first Ethernet packet according to the first maximum transmission unit MTU length, and the first Ethernet packet The length of the data field in the text is greater than the default MTU length of the device and not greater than the first MTU length; the communication unit is used to send the first Ethernet message to the network device.

In a possible implementation manner, the communication unit is further configured to: receive the first information sent by the network device; the processing unit is further configured to: obtain the first MTU length according to the first information.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.

In a possible implementation manner, the processing unit is further configured to: if it is determined to support receiving an Ethernet packet with a data field length of the first MTU length, control the communication unit to send second information to the network device, and the second information is used for Instruct the terminal device to send a second Ethernet packet according to the first MTU length; the communication unit is further configured to: receive a second Ethernet packet sent by the network device, the second Ethernet packet is received by the network device from the terminal device, The Ethernet packet sent by the terminal device according to the second information.

In a possible implementation manner, the processing unit is further configured to merge multiple segmented Ethernet packets into the first Ethernet packet.

In a fifth aspect, an embodiment of the present application provides an apparatus including: a processing unit and a communication unit; wherein the communication unit is configured to receive a first Ethernet packet sent by a network device, and the first Ethernet packet is a control device An Ethernet packet with a data field length greater than the default MTU length of the control device and not greater than the first MTU length sent to the network device; the processing unit is used to process the first Ethernet packet.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the apparatus and the maximum data field length supported by the network device.

In a possible implementation manner, the communication unit is further configured to receive second information sent by the network device; the processing unit is further configured to: obtain the first MTU length according to the second information; and control the communication unit to send to the network according to the first MTU length The device sends a second Ethernet packet, and the length of the data field in the second Ethernet packet is greater than the default MTU length of the device and not greater than the first MTU length.

In a possible implementation manner, the processing unit is further used for: merging multiple segmented Ethernet packets into Ethernet packets.

In a sixth aspect, an embodiment of the present application provides an apparatus including: a processing unit and a communication unit; wherein the communication unit is configured to receive a first Ethernet packet sent by a control device, and the data field in the first Ethernet packet The length of is greater than the default maximum transmission unit MTU length of the control device and not greater than the first MTU length; the processing unit is configured to control the communication unit to send the first Ethernet packet to the terminal device.

In a possible implementation manner, the processing unit is further configured to: obtain the first MTU length, and send first information to the control device, where the first information is used to indicate the first MTU length.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the device.

In a possible implementation manner, the communication unit is further configured to: receive the second information sent by the control device;

The processing unit is further used to: control the communication unit to forward the second information to the terminal device, the second information is used to instruct the terminal device to send a second Ethernet packet according to the first MTU length; the communication unit is also used to: receive the terminal device sent In the second Ethernet packet, the length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than the first MTU length.

In a possible implementation manner, the processing unit is further configured to merge multiple segmented Ethernet packets into the first Ethernet packet.

In a seventh aspect, an embodiment of the present application provides a device, including a processor and a transceiver; wherein the processor is used to run program instructions and cooperate with the transceiver to enable the device to implement the same as provided in any one of the first aspect , Or any of the methods provided in the second aspect, or any of the methods provided in the third aspect.

In an eighth aspect, embodiments of the present application also provide a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods provided in the foregoing aspects.

In a ninth aspect, an embodiment of the present application also provides a communication system, which includes a control device in any design of the first aspect, a terminal device in any design of the second aspect, and the third Any kind of network equipment in the design.

In a tenth aspect, the embodiments of the present application also provide a computer program product including instructions, which when run on a computer, cause the computer to execute the methods provided in the foregoing aspects.

These and other aspects of the application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a possible communication system to which the embodiments of this application are applicable;

2 is a schematic diagram of a protocol stack structure of a control device provided by an embodiment of the application;

Figure 3 is a schematic diagram of an IP header format;

4 is a schematic flowchart of an Ethernet packet transmission method provided by an embodiment of the application;

FIG. 5 is a schematic flowchart of a method for indicating a first MTU length for a control device according to an embodiment of this application;

Figure 6 is a schematic diagram of an Ethernet message segmentation;

FIG. 7 is a schematic diagram of a protocol stack structure of a control device provided by an embodiment of the application;

FIG. 8 is a schematic diagram of a device provided by an embodiment of this application;

FIG. 9 is a schematic diagram of an apparatus provided by an embodiment of the application.

detailed description

The application will be further described in detail below in conjunction with the accompanying drawings. The specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment. It should be noted that in the description of this application, "at least one" refers to one or more, and multiple refers to two or more. In view of this, in the embodiments of the present application, “a plurality of” may also be understood as “at least two”. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship. In addition, it should be understood that in the description of this application, words such as “first” and “second” are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating Or imply the order.

FIG. 1 is a schematic diagram of the architecture of a possible communication system to which an embodiment of this application is applicable. The communication system shown in Figure 1 includes control equipment, network equipment and terminal equipment. It should be understood that FIG. 1 is only a schematic diagram of the architecture of the communication system. In the embodiment of this application, the number of network devices and the number of terminal devices in the communication system are not limited, and the communication system to which the embodiment of this application applies except includes network devices. In addition to terminal devices, other devices may also be included, such as gateway devices, core network devices, wireless relay devices, and wireless backhaul devices, which are not limited in this embodiment of the present application. And, the network device and the control device in the embodiment of the present application may integrate all the functions in one independent physical device, or may distribute the functions on multiple independent physical devices, which is not limited in the embodiment of the present application.

In addition, the terminal device in the embodiments of the present application may be connected to the network device in a wireless manner, and the control device may be directly or indirectly connected to the network device in a wired or wireless manner. As shown in Fig. 1, the control device may directly establish a communication link with the network device, or may establish a communication link with the network device through a gateway device, and so on, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the network device may be a device that can communicate with terminal devices. The network device can be any device with a wireless transceiver function. Including but not limited to: base station (for example, base station NodeB, evolved base station eNodeB, base station gNodeB in 5G communication system, base station or network equipment in future communication system, access node in WiFi system, wireless relay node, wireless back Transmission node) and so on. The network device may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device may also be a small station, a transmission reference point (TRP), etc. The network device may also be NodeX, which is used to forward wireless signals. In the embodiment of the present application, the wireless signals may carry Ethernet packets. Of course, the application is not limited to this.

A terminal device is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes, Balloons and satellites are classy). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, an industrial control ( Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, and transportation safety Wireless terminal, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiment of this application does not limit the application scenario. Terminal equipment can sometimes be called user equipment (UE), access terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, terminal equipment, Wireless communication equipment, UE agent or UE device, etc.

Control equipment is used to control terminal equipment or provide services for terminal equipment. For example, the control device may be a content server, and for another example, the control device may be a control center in an industrial private network. In the case that the control device is used as the control center of the industrial private network, the control device can be integrated with the gateway device in the same physical device, that is, the gateway device executes the Ethernet packet transmission method provided in the embodiments of this application, and the control device executes A step of.

The communication systems to which the above system architecture is applicable include but are not limited to: Time Division Duplexing-Long Term Evolution (TDD LTE), Frequency Division Duplexing-Long Term Evolution (Frequency Division Duplexing-Long Term Evolution, FDD LTE) , Long Term Evolution-Advanced (LTE-A), and various wireless communication systems that will evolve in the future, such as 5G NR communication systems.

With the development of mobile communication technology, the communication system shown in Figure 1 is widely used for data transmission in Ethernet. For example, in an industrial private network, the control device can transfer Ethernet packets between the mobile communication system and the terminal device to realize data transmission.

Taking the control device in the 5G NR communication system as an example, FIG. 2 is a schematic diagram of the protocol stack structure of a control device provided by an embodiment of this application. Based on the protocol stack shown in FIG. 2, the control device can produce and send Ethernet packets . As shown in Figure 2, the protocol stack of the control device includes at least an application layer, an IP layer, an Ethernet layer, and a 5G network layer (it can also be other wireless network layers such as 4G network layer, 3G network layer, etc., which will not be repeated here).

Specifically, the control device can generate and send an Ethernet packet through the following process:

Step 1: Generate the data to be transmitted through the application layer.

Step 2: The control device can divide the data to be transmitted into multiple data segments through the IP layer, and add an IP header to each data segment to obtain multiple IP data packets. Figure 3 is a schematic diagram of an IP header format. As shown in FIG. 3, the IP header includes multiple indication information such as version, header length, service type, total length, protocol, etc., where the total length is used to indicate the length of the data segment in the IP header. In the IP packet header shown in FIG. 3, the total length can occupy 16 bits. Therefore, theoretically, the length of the data segment in the IP data packet can be up to 65536 (2 ¹⁶ ) Bytes.

Step 3: Encapsulate IP data packets through the Ethernet layer and add an Ethernet frame header to each IP data packet to obtain multiple Ethernet packets. The Ethernet message includes an Ethernet frame header and a data field. The data field includes the above-mentioned IP data packet. In some scenarios, it may also include an indicator bit at the end of the Ethernet message.

Step 4: Send the Ethernet message through the 5G network layer so that the Ethernet message can adapt to the 5G communication protocol, and then the Ethernet message can be transmitted through the 5G network.

Generally, in order to ensure that Ethernet packets can be transmitted in the Ethernet, the devices in the Ethernet are configured with a default maximum transmission unit (MTU) length, so that the Ethernet packets will not exceed the maximum packet supported by each device in the Ethernet. Text length. Generally, the default MTU length is 1500 Bytes. When sending an Ethernet packet, an Ethernet device can send an Ethernet packet according to the default MTU length, that is, the length of the data field in an Ethernet packet cannot be greater than 1500 Bytes. Based on this, even if the length of the data segment in the IP data packet can reach up to 65536 Bytes, it is still necessary to control the length of the IP data packet to not exceed 1500 Bytes.

It can be understood that the longer the data field in the Ethernet message, the less the Ethernet message needed to transmit the data to be transmitted, and the less the overhead of the IP header and the Ethernet frame header. With the development of wireless communication technology, Ethernet based on mobile communication networks can already support the transmission of larger lengths of Ethernet packets. For example, 5G networks can support the transmission of 9000Bytes Ethernet packets, and this length will still be available in the future. It is possible to improve further. However, in the existing Ethernet, the default MTU length limits the length of the data field in the Ethernet message, so that the Ethernet cannot make full use of the transmission performance of the mobile communication network. Moreover, because the length of the data field in the Ethernet message is relatively short, the number of Ethernet messages required for data transmission is increased, thereby increasing the overhead of the IP packet header and the Ethernet frame header.

In order to reduce the overhead of the IP header and the Ethernet frame header, and enable the Ethernet to make full use of the transmission performance of the mobile communication network, an embodiment of the present application provides an Ethernet packet transmission method. The following uses Embodiment 1, Embodiment 2 and Embodiment 3 to further illustrate the methods provided in the embodiments of the present application.

Example one

Fig. 4 exemplarily shows a schematic flow chart of an Ethernet packet transmission method. As shown in Fig. 4, it mainly includes the following steps:

S401: The control device generates a first Ethernet packet according to the first MTU length. In the embodiment of this application, the value of the first MTU length in the control device is greater than the default MTU length. The first MTU length can be manually configured by the background or can be instructed by the network device as the control device. No restrictions.

For the specific process of the control device generating the first Ethernet packet according to the first MTU length, reference may be made to the detailed process provided in the above steps 1 to 3, which will not be repeated here. It should be pointed out that, in this embodiment of the application, the length of the data field in the first Ethernet packet generated by the control device according to the first MTU length may be greater than the default MTU length, but may not exceed the first MTU length. For example, assuming that the default MTU length is 1500 Bytes and the first MTU length is 9000 Bytes, the length of the data field in the first Ethernet packet generated by the control device can be 800 Bytes or 2000 Bytes, but cannot exceed 9000 Bytes.

S402: The control device sends the first Ethernet packet to the network device.

S403: The network device receives the first Ethernet packet sent by the control device, and forwards the received first Ethernet packet to the terminal device.

S404: The terminal device receives the first Ethernet packet forwarded by the network device, and processes the received first Ethernet packet.

Through the process shown in FIG. 4, the network device transmits the first Ethernet message to the terminal device. Moreover, since the length of the data field in the first Ethernet packet sent by the control device is no longer limited to the default MTU length, the control device can send the first Ethernet packet whose data field length exceeds the default MTU length according to the first MTU length , Thereby reducing the number of Ethernet packets as a whole, thereby helping to reduce the overhead of IP packet headers and Ethernet frame headers.

In the process of transmitting the first Ethernet packet to the terminal device, the first Ethernet packet sent by the control device needs to be transmitted to the terminal device via the network device. In order to improve the transmission success rate of the first Ethernet packet between the terminal device and the network device, in a possible implementation manner, the first MTU length is not greater than the maximum data field length supported by the terminal device and the maximum data field length supported by the network device. The minimum value in the length of the data field. Specifically, the maximum data field length supported by the terminal device can be determined according to the version number of the communication protocol supported by the terminal device (or the maximum frame length of the Ethernet packet supported by the terminal device can be determined first according to the version number of the communication protocol. The maximum data field length supported by the terminal device is then determined, and the same is true in the following, and will not be repeated), that is, under the current communication protocol version, the maximum data field length in the Ethernet packet that the terminal device can transmit. Similarly, the maximum data field length supported by the network device can be determined according to the version number of the communication protocol supported by the network device, that is, under the current communication protocol version, the maximum data in the Ethernet packet that the network device can transmit The length of the field.

With the above method, since the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device, the first Ethernet packet generated by the network device according to the first MTU length is generally The maximum frame length of the Ethernet message supported by the network device and the terminal device will not be exceeded, thereby helping to improve the success rate of the first Ethernet message being transmitted between the network device and the terminal device.

Example two

As described above, the first MTU length in the embodiment of the present application may be indicated by the network device for the control device. FIG. 5 exemplarily shows a schematic flowchart of a method for a network device to indicate a first MTU length for a control device, and this process may be performed before the process shown in FIG. 4. As shown in Figure 5, it mainly includes the following steps:

S501: The network device obtains the first MTU length. In a mobile communication system, the network device can determine the version number of the communication protocol supported by the terminal device when establishing a connection with the terminal device. Based on this, the network device can determine the first MTU length. For specific implementation, please refer to the description of the first MTU in Embodiment 1, which will not be repeated.

Based on this, the network device indicates the first MTU length for the control device, which can make the control device obtain the first MTU length more flexible, and can be adjusted adaptively according to different terminal devices. For example, assuming that the maximum data field length supported by the network device is 6000 Bytes, and the maximum data field length supported by the terminal device 1 is 5000 Bytes, the network device obtains the first MTU length of 5000 Bytes, that is, the transmission between the control device and the terminal device 1 The maximum length of the data field in an Ethernet message is 5000 Bytes. If the maximum data field length supported by the terminal device 2 is 3000 Bytes, the network device acquires the first MTU length of 3000 Bytes, that is, the maximum length of the data field in the Ethernet packet transmitted between the control device and the terminal device 2 is 3000 Bytes.

S502: The network device sends first information to the control device, where the first information is used to indicate the first MTU length.

S503: The control device receives the first information sent by the network device, and obtains the first MTU length according to the first information.

So far, the control device can generate the first Ethernet packet according to the acquired first MTU length, and send the generated first Ethernet packet to the terminal device through the network device. In a possible implementation, the control device can also indicate the first MTU length for the terminal device, so that the terminal device can also generate a second Ethernet packet according to the first MTU length, thereby reducing the IP header and The overhead of the Ethernet frame header.

For example, as shown in FIG. 5, after acquiring the first MTU length, the control device may also perform S504: the control device determines whether it supports receiving an Ethernet packet with a data field length of the first MTU length. Specifically, the control device can judge according to the transmission condition of the communication link with the network device, or judge according to the size of the data field in the Ethernet packet that has been received from the network device and sent by other terminal devices, for example, If the control device has ever received an Ethernet packet with a data field length not less than the first MTU length from a network device, it can be determined that it can support receiving an Ethernet packet with a data field length of the first MTU length, etc., this application The embodiment does not limit this.

If the control device determines that it supports receiving an Ethernet packet with a data field length of the first MTU length, it can execute S505 to send the second information to the network device, otherwise, it can execute S510 to end the process of indicating the first MTU length for the terminal device .

S506: The network device receives the second information sent by the control device, and forwards the second information to the terminal device.

S507: The terminal device receives the second information sent by the network device, and obtains the first MTU length according to the second information.

S508: In the subsequent communication process, the terminal device may generate a second Ethernet packet according to the first MTU length, and send the second Ethernet packet to the network device. In the second Ethernet packet generated by the terminal device, the length of the data field may be greater than the default MTU length of the terminal device and not greater than the first MTU length, thereby helping to reduce the overhead of the IP header and the Ethernet frame header at the terminal device.

S509: The network device receives the second Ethernet packet sent by the terminal device, and forwards the received second Ethernet packet to the control device. After the control device receives the second Ethernet packet forwarded by the network device, it completes the transmission of the second Ethernet packet from the terminal device to the control device.

Example three

When the Ethernet is a time-sensitive network (TSN), the control device (same as the terminal device) may segment the low-priority IP data packet when it generates the first Ethernet packet through the Ethernet layer . Taking the control device as an example, the Ethernet layer of the control device includes a message generating module and a message sending module, wherein the message generating module is used to generate the first Ethernet message, and the message sending module is used to transfer the first Ethernet message Send to the next layer of the ether layer.

Taking Fig. 6 as an example, suppose that the message generating module generates an Ethernet message A, and the message sending module sends the Ethernet message A to the 5G network layer, and the 5G network layer sends the Ethernet message A through the wireless air interface. However, when the message sending module sends Ethernet message A to the 5G network layer, the message generation module generates an Ethernet message B with a higher priority. At this time, the message sending module can Message A is segmented, which can also be understood as that the message sending module stops sending Ethernet message A and instead sends Ethernet message B. Therefore, Ethernet message A is divided into two segmented Ethernet messages—Sent The segmented Ethernet message A1 for the 5G network layer and the unsent segmented Ethernet message A2. For the segmented Ethernet message A2, the message generation module can add the Ethernet frame header to the segmented Ethernet message A2, and the message sending module will continue to send the segment with the added Ethernet frame header after sending the Ethernet message B. For Ethernet message A2, the message generation module may not add an Ethernet frame header to the segmented Ethernet message A2, and the message sending module continues to send the segmented Ethernet message A2 after sending the Ethernet message B.

Based on this, the control device will sequentially send segmented Ethernet messages A1, Ethernet messages B, and segmented Ethernet messages A2 to the network devices. Among them, the segmented Ethernet messages A1 and the segmented Ethernet messages A2 are actually an Ethernet Net message—Ethernet message A.

It can be seen from the above process that the low-priority Ethernet packet A is divided into two segmented Ethernet packets and sent. In the case of transmission between the control device and the network device based on the wireless air interface, the Ethernet packet A is segmented Sending increases the number of packets that need to be transmitted, which is not conducive to improving wireless resource utilization. Moreover, when the Ethernet frame header is also added to the segmented Ethernet message A2, more Ethernet frame headers need to be occupied, which increases the overhead of the Ethernet frame header.

Based on this, in a possible implementation manner, before the control device sends the first Ethernet packet to the network device, it may also merge multiple segmented Ethernet packets of the first Ethernet packet into a complete first Ethernet packet. Ethernet packets, thereby reducing the number of packets transmitted on the wireless air interface and improving the utilization of wireless resources.

For example, the control device may use the protocol stack shown in FIG. 7, and an adaptation layer is added between the Ethernet layer and the 5G network layer. Based on the protocol stack shown in FIG. 7, the control device can buffer the segmented Ethernet message A1 and the segmented Ethernet message A2 of the Ethernet message A through the adaptation layer. Specifically, the message sending module in the Ethernet layer sends the Ethernet message A to the adaptation layer after the message generation module generates the Ethernet message A. Since in the process of sending the Ethernet message A, the message generating module generates the Ethernet message B, and the message sending module sends the Ethernet message B instead. In this case, the adaptation layer receives and buffers the segmented Ethernet message A1, and then receives the Ethernet message B. Furthermore, the adaptation layer sends the Ethernet packet B to the 5G network layer, and the 5G network layer sends the Ethernet packet B through the wireless air interface. After sending the Ethernet message B to the adaptation layer, the message generation module continues to send the segmented Ethernet message A2. After the adaptation layer receives the segmented Ethernet message A2, it combines the segmented Ethernet message A1 and the segmented Ethernet message A2 into an Ethernet message A, and sends it to the 5G network layer.

Among them, the adaptation layer can determine whether the first Ethernet packet can be sent through the identification information at the end of the segmented Ethernet packet. For example, the message sending module of the Ethernet layer can add first identification information to the end of the segmented Ethernet message A2 to indicate that the Ethernet message A has been sent. In a possible implementation, it can also be The second identification information is added to the end flag of the segmented Ethernet message A1, indicating that the Ethernet message has not yet been sent. Similarly, the first identification information can also be added to the identification bit at the end of the Ethernet message B to indicate that the Ethernet message B has been sent.

Based on this, the adaptation layer can mainly perform the following steps in the process of the control device sending Ethernet packet A and Ethernet packet B:

S1: After receiving the segmented Ethernet message A1, the adaptation layer determines that the Ethernet message A corresponding to the segmented Ethernet message A1 has not been sent yet according to the second identification information at the end of the segmented Ethernet message A1. Cache segmented Ethernet message A1. Or, because the end identification bit of the segmented Ethernet message A1 is not added with the first identification information, it is determined that the Ethernet message A corresponding to the segmented Ethernet message A1 has not been sent yet.

S2: After receiving the Ethernet message B, the adaptation layer determines that the Ethernet message B has been sent according to the first identification information of the identification bit at the end of the Ethernet message B. Moreover, because the segmented Ethernet message A1 is a segmented Ethernet message of the lower priority Ethernet message, it can be determined that the Ethernet message B is a complete Ethernet message with a higher priority, and then It is determined that there is no need to merge the segmented Ethernet message A1 and the Ethernet message B. The adaptation layer sends the Ethernet packet B to the 5G network layer, and the 5G network layer sends the Ethernet packet B through the wireless air interface.

S3: After receiving the segmented Ethernet message A2, the adaptation layer determines that the Ethernet message A corresponding to the segmented Ethernet message A2 has been sent according to the second identification information at the end of the segmented Ethernet message A2. In this case, the adaptation layer combines the segmented Ethernet message A1 and the segmented Ethernet message A2 into the Ethernet message A, and then sends it to the 5G network layer, and the 5G network layer sends the Ethernet message through the wireless air interface A.

It can be understood that the foregoing process can also be implemented by the control device through an improved Ethernet layer or an improved 5G network layer, which will not be repeated here.

Similar to the control device, before the terminal device sends the second Ethernet packet to the network device, it can also merge multiple segmented Ethernet packets of the second Ethernet packet into a complete second Ethernet packet, and then Send the second Ethernet message. For specific implementation, please refer to the above description of the control device, which will not be repeated here.

Similar to the control device, before the network device forwards the first Ethernet packet to the terminal device, it can also merge multiple segmented Ethernet packets of the first Ethernet packet into a complete first Ethernet packet, and then Send the first Ethernet message. The network device forwards the second Ethernet packet to the control device in the same way. Next, take the network device forwarding the first Ethernet packet to the terminal device as an example for description, which mainly includes the following two situations:

Situation 1:

Based on wired Ethernet transmission between the control device and the network device, the control device can send a segmented Ethernet message A1 and a segmented Ethernet message A2 to the network device. In this case, the network device can also use the protocol stack shown in FIG. 7. Specifically, the network device forwarding the Ethernet packet A and the Ethernet packet B to the terminal device mainly includes the following steps:

Step 1: After receiving the segmented Ethernet message A1, according to the first identification information at the end of the segmented Ethernet message A1, it can be determined that the Ethernet message to which the segmented Ethernet message A1 belongs has not yet been sent. In this case, the network device can buffer the segmented Ethernet message A1 in the adaptation layer.

Step 2: Ethernet message B is received, because the Ethernet message B includes a complete frame header, the end identifier includes the second identification information, and the message received before the Ethernet message B is a segmented Ethernet message Therefore, the network device can determine that the Ethernet message B is a complete Ethernet message with a higher priority. Then, the network device can forward the Ethernet packet B to the terminal device through the 5G network layer.

Step 3: After receiving the segmented Ethernet message A2, according to the second identification information at the end of the segmented Ethernet message A2, the Ethernet message A corresponding to the segmented Ethernet message A1 and the segmented Ethernet message A2 can be determined It has been sent. In this case, the network device merges the segmented Ethernet message A1 and the segmented Ethernet message A2 through the adaptation layer to obtain a complete Ethernet message A, and forwards the obtained Ethernet message A to the terminal device.

Optionally, the 5G network layer shown in FIG. 7 may also be a 4G network layer or other network layers, which is not limited in this application.

Situation 2:

The network device receives the Ethernet message C first, and the message sending module in the Ethernet layer of the network device needs to send the Ethernet message C to the next layer of the Ethernet layer, such as the adaptation layer in Figure 7. If the message sending module sends the Ethernet message C to the next layer of the Ethernet layer, and the network device receives the higher priority Ethernet message D, the message sending module stops sending to the adaptation layer For Ethernet message C, send the Ethernet message D instead, and then continue to send the remaining segmented Ethernet messages of the Ethernet message C after sending the Ethernet message D. The adaptation layer can first buffer the segmented Ethernet message of the received Ethernet message C. After receiving the Ethernet message D and sending the Ethernet message D to the 5G network layer, the remaining Ethernet message C is received And merge the segmented Ethernet message corresponding to Ethernet message C into Ethernet message C. After that, the Ethernet message C is sent to the 5G network layer. For specific implementation methods, please refer to the Ethernet message A and Ethernet message B sent by the control device, which will not be repeated here.

It is understandable that the network equipment can also implement the above functions through the improved Ethernet layer or the improved 5G network layer, which will not be repeated here.

The foregoing mainly introduces the solution provided in this application from the perspective of interaction between control equipment, network equipment, and terminal equipment. It can be understood that, in order to implement the above-mentioned functions, the control device, network device or terminal device may include hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware 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.

In the case of using an integrated unit, FIG. 8 shows a possible exemplary block diagram of a device involved in an embodiment of the present application, and the device 800 may exist in the form of software. The apparatus 800 may include: a processing unit 802 and a communication unit 803. The processing unit 802 is used to control and manage the actions of the device 800. The communication unit 803 is used to support communication between the device 800 and other network entities. The device 800 may further include a storage unit 801 for storing program codes and data of the device 800.

The processing unit 802 may be a processor or a controller, for example, a general-purpose central processing unit (central processing unit, CPU), a general-purpose processor, a digital signal processing (digital signal processing, DSP), and an application specific integrated circuit (application specific integrated circuit). circuits, ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 803 may be a communication interface, a transceiver, or a transceiving circuit, etc., where the communication interface is a general term. In a specific implementation, the communication interface may include multiple interfaces. The storage unit 801 may be a memory.

The apparatus 800 may be the control device in any of the above embodiments, or may also be a semiconductor chip provided in the control device. The processing unit 802 may support the apparatus 800 to perform the actions of controlling the device in the foregoing method examples, and the communication unit 803 may support the communication between the apparatus 800 and the network device.

Specifically, in one embodiment, the processing unit 802 is configured to generate a first Ethernet packet according to the first maximum transmission unit MTU length, and the length of the data field in the first Ethernet packet is greater than the default MTU length of the device 800 And not greater than the first MTU length;

The communication unit 803 is configured to send the first Ethernet packet to the network device.

In a possible implementation manner, the communication unit 803 is further configured to: receive the first information sent by the network device;

The processing unit 802 is further configured to obtain the first MTU length according to the first information.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.

In a possible implementation manner, the processing unit 802 is further configured to: if it is determined to support receiving an Ethernet packet with a data field length of the first MTU length, control the communication unit 803 to send the second information to the network device. Used to instruct the terminal device to send the second Ethernet packet according to the first MTU length;

The communication unit 803 is further configured to receive a second Ethernet packet sent by the network device, where the second Ethernet packet is a second Ethernet packet received by the network device from the terminal device and sent by the terminal device according to the second information.

In a possible implementation manner, the processing unit 802 is further configured to merge multiple segmented Ethernet packets into a first Ethernet packet.

The apparatus 800 may also be the terminal device in any of the above embodiments, or may also be a semiconductor chip provided in the terminal device. The processing unit 802 may support the apparatus 800 to perform the actions of the terminal device in the foregoing method examples, and the communication unit 803 may support the communication between the apparatus 800 and the network device.

Specifically, in one embodiment, the communication unit 803 is configured to receive a first Ethernet packet sent by the network device, where the first Ethernet packet is sent by the control device to the network device and the data field length is greater than that of the control device. Ethernet packets with the default MTU length and not greater than the first MTU length;

The processing unit 802 is configured to process the first Ethernet packet.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the apparatus and the maximum data field length supported by the network device.

In a possible implementation manner, the communication unit 803 is further configured to receive the second information sent by the network device;

The processing unit 802 is further configured to obtain the first MTU length according to the second information, and control the communication unit 803 according to the first MTU length to send a second Ethernet packet to the network device, and the length of the data field in the second Ethernet packet is greater than The default MTU length of the device 800 is not greater than the first MTU length.

In a possible implementation manner, the processing unit 802 is further configured to merge multiple segmented Ethernet packets into a second Ethernet packet.

The apparatus 800 may also be the network equipment in any of the above embodiments, or may also be a semiconductor chip provided in the network equipment. The processing unit 802 may support the apparatus 800 to perform the actions of the network equipment in the above method examples, and the communication unit 803 may support the communication between the apparatus 800 and the terminal equipment and the control equipment.

Specifically, in one embodiment, the communication unit 803 is configured to receive the first Ethernet packet sent by the control device, and the length of the data field in the first Ethernet packet is greater than the default maximum transmission unit MTU length of the control device and Not greater than the first MTU length;

The processing unit 802 is configured to control the communication unit 803 to send the first Ethernet packet to the terminal device.

In a possible implementation manner, the processing unit 802 is further configured to: obtain the first MTU length, and send first information to the control device, where the first information is used to indicate the first MTU length.

In a possible implementation manner, the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the device.

In a possible implementation manner, the communication unit 803 is further configured to: receive the second information sent by the control device;

The processing unit 802 is further configured to: control the communication unit 803 to forward second information to the terminal device, and the second information is used to instruct the terminal device to send a second Ethernet packet according to the first MTU length;

The communication unit 803 is further configured to receive a second Ethernet packet sent by the terminal device, where the length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than the first MTU length.

In a possible implementation manner, the processing unit 802 is further configured to merge multiple segmented Ethernet packets into a first Ethernet packet.

Refer to FIG. 9, which is a schematic diagram of an apparatus provided in this application. The apparatus may be a control device, a terminal device, or a network device in the foregoing embodiment. The device 900 includes a processor 902, a communication interface 903, and a memory 901. Optionally, the apparatus 900 may further include a bus 904. Among them, the communication interface 903, the processor 902, and the memory 901 may be connected to each other through a bus 904; the bus 904 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (extended industry standard architecture) EISA) bus, etc. The bus 904 can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The processor 902 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used to control the execution of the program of the present application.

The communication interface 903 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), wired access networks, etc.

The memory 901 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (electrically programmable read-only memory, EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital universal disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer, but not limited to this. The memory may exist independently and is connected to the processor through the bus 904. The memory can also be integrated with the processor.

The memory 901 is used to store computer-executable instructions for executing the solution of the present application, and the processor 902 controls the execution. The processor 902 is configured to execute the computer-executable instructions stored in the memory 901, so as to implement the Ethernet packet transmission method provided in the foregoing embodiment of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.

In the above embodiments, it 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 program 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 may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). 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, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

The various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other storage medium in the art. Exemplarily, the storage medium may be connected to the processor, so that the processor can read information from the storage medium, and can store and write information to the storage medium. Optionally, the storage medium may also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device. Optionally, the processor and the storage medium may also be arranged in different components in the terminal device.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the application has been described in combination with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, this specification and drawings are merely exemplary descriptions of the application defined by the appended claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims (31)

1. An Ethernet packet transmission method is characterized in that it includes:

   The control device generates the first Ethernet packet according to the first maximum transmission unit MTU length, and the length of the data field in the first Ethernet packet is greater than the default MTU length of the control device and not greater than the first MTU length;

   The control device sends the first Ethernet packet to the network device.
2. The method according to claim 1, wherein before the control device generates the first Ethernet packet according to the first MTU length, the method further comprises:

   The control device receives the first information sent by the network device, and obtains the first MTU length according to the first information.
3. The method according to claim 1, wherein the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.
4. The method according to claim 2, wherein after the control device obtains the first MTU length according to the first information, the method further comprises:

   If the control device determines that it supports receiving an Ethernet packet with a data field length of the first MTU length, it sends second information to the network device, where the second information is used to instruct the terminal device according to the Sending a second Ethernet packet with the first MTU length;

   The control device receives a second Ethernet packet sent by the network device, where the second Ethernet packet is received by the network device from the terminal device and sent by the terminal device according to the second information Ethernet message.
5. The method according to any one of claims 1 to 4, wherein before the control device sends the first Ethernet packet to the network device, the method further comprises:

   The control device merges a plurality of segmented Ethernet messages into the first Ethernet message.
6. An Ethernet packet transmission method is characterized in that it includes:

   The terminal device receives the first Ethernet packet sent by the network device, where the first Ethernet packet is sent by the control device to the network device and the data field length is greater than the default MTU length of the control device and not greater than the first Ethernet packet. Ethernet packets with MTU length;

   The terminal device processes the first Ethernet packet.
7. 8. The method according to claim 6, wherein the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.
8. The method of claim 6, further comprising:

   The terminal device receives the second information sent by the network device, and obtains the first MTU length according to the second information;

   The terminal device sends a second Ethernet packet to the network device according to the first MTU length, and the length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than all The first MTU length.
9. The method according to claim 8, wherein before the terminal device sends a second Ethernet packet to the network device according to the first MTU length, the method further comprises:

   The terminal device merges a plurality of segmented Ethernet packets into the second Ethernet packet.
10. An Ethernet packet transmission method is characterized in that it includes:

    Receiving, by the network device, a first Ethernet packet sent by a control device, where the length of the data field in the first Ethernet packet is greater than the default maximum transmission unit MTU length of the control device and not greater than the first MTU length;

    The network device sends the first Ethernet packet to a terminal device.
11. The method according to claim 10, wherein before the network device receives the first Ethernet packet sent by the control device, the method further comprises:

    The network device obtains the first MTU length, and sends first information to the control device, where the first information is used to indicate the first MTU length.
12. The method according to claim 10, wherein the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.
13. The method of claim 10, further comprising:

    The network device receives the second information sent by the control device, and forwards the second information to the terminal device, where the second information is used to instruct the terminal device to send the second information according to the first MTU length Two Ethernet messages;

    The network device receives a second Ethernet packet sent by the terminal device, and the length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than the first MTU length.
14. The method according to claim 10, wherein before the network device sends the first Ethernet packet to the terminal device, the method further comprises:

    The network device merges multiple segmented Ethernet messages into the first Ethernet message.
15. A device, characterized by comprising: a processing unit and a communication unit;

    The processing unit is configured to generate a first Ethernet packet according to the first maximum transmission unit MTU length, and the length of the data field in the first Ethernet packet is greater than the default MTU length of the device and not greater than the first Ethernet packet. One MTU length;

    The communication unit is configured to send the first Ethernet packet to a network device.
16. The apparatus according to claim 15, wherein the communication unit is further configured to: receive the first information sent by the network device;

    The processing unit is further configured to obtain the first MTU length according to the first information.
17. The apparatus according to claim 15, wherein the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the network device.
18. The apparatus according to claim 16, wherein the processing unit is further configured to: if it is determined to support receiving an Ethernet packet with a data field length of the first MTU length, control the communication unit to send the The network device sends second information, where the second information is used to instruct the terminal device to send a second Ethernet packet according to the first MTU length;

    The communication unit is further configured to: receive a second Ethernet packet sent by the network device, where the second Ethernet packet is received by the network device from the terminal device, and the terminal device according to the The Ethernet packet sent by the second information.
19. The apparatus according to any one of claims 15 to 18, wherein the processing unit is further configured to merge multiple segmented Ethernet packets into the first Ethernet packet.
20. A device, characterized by comprising: a processing unit and a communication unit;

    The communication unit is configured to receive a first Ethernet packet sent by a network device, where the first Ethernet packet is sent by the control device to the network device and has a data field length greater than the default MTU length of the control device An Ethernet packet with a length not greater than the first MTU;

    The processing unit is configured to process the first Ethernet packet.
21. The apparatus according to claim 20, wherein the first MTU length is not greater than the minimum of the maximum data field length supported by the apparatus and the maximum data field length supported by the network device.
22. The apparatus according to claim 20, wherein the communication unit is further configured to receive second information sent by the network device;

    The processing unit is further configured to obtain a first MTU length according to the second information, and control the communication unit to send a second Ethernet packet to the network device according to the first MTU length, and the second Ethernet The length of the data field in the network message is greater than the default MTU length of the device and not greater than the first MTU length.
23. The device according to claim 22, wherein the processing unit is further configured to merge a plurality of segmented Ethernet packets into the second Ethernet packet.
24. A device, characterized by comprising: a processing unit and a communication unit;

    The communication unit is configured to receive a first Ethernet packet sent by a control device, where the length of the data field in the first Ethernet packet is greater than the default maximum transmission unit MTU length of the control device and not greater than the first MTU length;

    The processing unit is configured to control the communication unit to send the first Ethernet packet to a terminal device.
25. The apparatus according to claim 24, wherein the processing unit is further configured to: obtain the first MTU length, and send first information to the control device, the first information being used to indicate the first MTU length MTU length.
26. The apparatus according to claim 24, wherein the first MTU length is not greater than the minimum value of the maximum data field length supported by the terminal device and the maximum data field length supported by the apparatus.
27. The device according to claim 24, wherein the communication unit is further configured to: receive second information sent by the control device;

    The processing unit is further configured to: control the communication unit to forward the second information to the terminal device, where the second information is used to instruct the terminal device to send a second Ethernet according to the first MTU length Message

    The communication unit is further configured to: receive a second Ethernet packet sent by the terminal device, where the length of the data field in the second Ethernet packet is greater than the default MTU length of the terminal device and not greater than the first One MTU length.
28. The apparatus according to claim 24, wherein the processing unit is further configured to merge multiple segmented Ethernet packets into the first Ethernet packet.
29. A device, characterized in that it comprises a processor and a transceiver;

    The processor is configured to run program instructions and cooperate with the transceiver to enable the device to implement the method according to any one of claims 1 to 14.
30. A computer-readable storage medium, characterized by comprising program instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1 to 14.
31. A system, characterized by comprising the device according to claim 29.

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