WO2022247463A1

WO2022247463A1 - Delay measurement method and apparatus, and digital twin network

Info

Publication number: WO2022247463A1
Application number: PCT/CN2022/084888
Authority: WO
Inventors: 杨红伟; 王丹
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2021-05-28
Filing date: 2022-04-01
Publication date: 2022-12-01
Also published as: CN115412463B; CN115412463A

Abstract

The embodiments of the present application provide a delay measurement method and apparatus, and a digital twin network. The digital twin network comprises: a physical network and a twin network, each physical network element of the physical network being provided with a corresponding twin network element in the twin network. The method comprises: by means of a delay deterministic network between a physical network element and a twin network element, the twin network element receives first traffic information transmitted by the physical network element, time synchronization of each twin network element of the twin network being achieved; and the twin network element determines, on the basis of arrival times of the first traffic information as recorded by at least two twin network elements, the transmission delay of the first traffic information between physical network elements.

Description

Delay measurement method, device and digital twin network

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110589929.2 and a filing date of May 28, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated into this application by reference.

technical field

The present application relates to the field of communication technology, and in particular to a delay measurement method, device and digital twin network.

Background technique

As shown in Figure 1, the definition of digital twin network is: a network system with physical network entities and virtual twins, and the two can be interactively mapped in real time. In this system, various network management and applications can efficiently analyze, diagnose, simulate and control the physical network using the digital twin network. Among them, the digital twin network includes: physical network layer and twin network layer. The twin network layer completes the virtual mapping of the physical network layer, that is, each physical network element in the physical network layer has a corresponding twin network element in the twin network layer. Information such as network element connection relationships, traffic data, and network element status data in the physical network layer will have a virtual mapping on the twin network layer. The physical network and the twin network are mapped to each other, and data is exchanged in real time.

The digital twin network can realize functions such as network low-cost trial and error, network intelligent operation and maintenance, and network lifecycle management. It is an important technical direction for future networks.

Traditional network delay measurement methods include the following three methods:

1) Active measurement: Send measurement protocol messages to the network to realize the measurement of the loopback delay or one-way delay between the sending end and the receiving end. The advantage of active measurement is that it is flexible in application. The disadvantage is that it only measures the measurement protocol messages and cannot To measure the delay of real services, and to measure the one-way delay, the physical network elements of the sending end and the receiving end need to support the time synchronization protocol;

2) Passive measurement: Calculate the network delay by collecting actual business traffic. The advantage of passive measurement is that it can measure real business delay indicators. The disadvantage is that it can only measure protocols with round-trip messages, such as TCP (Transmission Control Protocol, Transmission Control Protocol) , for one-way transmission, there is no protocol for round-trip confirmation messages, such as UDP (User Datagram Protocol, User Datagram Protocol), passive measurement cannot measure delay.

3) Hybrid measurement: Hybrid measurement is a combination of active and passive measurements, that is, inserting some fields or flags in the service message to realize the delay measurement of the actual service. The disadvantage is that the format of the actual service message is changed, which will affect the service. The forwarding behavior causes the observer effect, and requires physical network elements to be able to identify and forward modified service packets.

In summary, the above three delay measurement methods have the following disadvantages:

1) Injecting measurement packets into the actual network will increase the network burden and occupy network resources;

2) It is impossible to measure the delay of all protocol types, and there are requirements for the protocol types;

3) After changing the format of the business message, the physical network needs to be upgraded, which is difficult to implement;

4) Measuring the one-way delay requires the physical network element to support the time synchronization protocol.

Contents of the invention

The purpose of the embodiments of the present application is to provide a delay measurement method, device and digital twin network.

An embodiment of the present application provides a delay measurement method, which is applied to a digital twin network. The digital twin network includes: a physical network and a twin network, and each physical network element of the physical network is provided with a corresponding a twin network element; the method includes:

Through the delay deterministic network between the physical network element and the twin network element, the twin network element receives the first flow information transmitted by the physical network element; wherein, each twin network element of the twin network Realize time synchronization between;

The twin network element determines a transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.

In some optional embodiments of the present application, the method also includes:

The twin network element, according to the local time of the twin network element when the first traffic information arrives at the twin network element, the transmission delay between the physical network element and the twin network element, and a reference delay, Determine the arrival time of the first traffic information recorded by the twin network element.

In some optional embodiments of the present application, the twin network element is configured according to the local time of the twin network element when the first traffic information arrives at the twin network element, the physical network element and the twin network element Determining the arrival time of the first traffic information recorded by the twin network element, including:

According to a first formula, determine the arrival time of the first traffic information recorded by the twin network element; wherein, the first formula is:

T=tn+Tmax-Tn;

Wherein, T is the arrival time of the first traffic information recorded by the twin network element, tn is the local time of the twin network element when the first traffic information arrives at the twin network element, and Tmax is the reference Delay, Tn is the transmission delay between the physical network element and the twin network element.

The twin network element determines the transmission delay between each physical network element and the twin network element corresponding to the physical network element;

The maximum transmission delay is selected as the reference delay.

In some optional embodiments of the present application, if multiple twin network elements are distributed in different physical entities, the method further includes:

Between the physical entities, the precision time protocol (PTP) or the network time protocol (NTP) is used to realize the time synchronization between each twin network element.

In some optional embodiments of the present application, the twin network element determines that the first traffic information is between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements transmission delay, including:

According to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element, determine that the first traffic information is between the first physical network element and the second network element. Transmission delay between two physical network elements; wherein, the first physical network element corresponds to the first twin network element, and the second physical network element corresponds to the second twin network element.

In some optional embodiments of the present application, the determination is made according to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element The transmission delay of the first flow information between the first physical network element and the second physical network element includes:

Determining the transmission delay of the first traffic information between the first physical network element and the second physical network element is: the arrival time of the first traffic information recorded by the second twin network element is different from that recorded by the first twin network element The difference between the arrival times of the first traffic information.

The embodiment of the present application also provides a delay measurement device, which is applied to a digital twin network. The digital twin network includes: a physical network and a twin network, and each physical network element of the physical network is provided with a corresponding twin network element; the device includes:

The receiving module is configured to receive the first traffic information transmitted by the physical network element through the delay deterministic network between the physical network element and the twin network element; wherein, each twin network element of the twin network Realize time synchronization between;

The determination module is configured to determine the transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.

The embodiment of the present application also provides a digital twin network, the digital twin network includes: a physical network and a twin network, each physical network element of the physical network is provided with a corresponding twin network element in the twin network; the The twin network element includes a processor and a transceiver, the transceiver receives and sends data under the control of the processor, and the processor is used to perform the following operations:

Receive the first traffic information transmitted by the physical network element through the delay deterministic network between the physical network element and the twin network element; wherein, time synchronization is realized between each twin network element of the twin network ;

The transmission delay of the first traffic information between the physical network elements is determined according to the arrival time of the first traffic information recorded by at least two twin network elements.

In some optional embodiments of the present application, the processor is further configured to perform the following operations:

Determine the twin network according to the local time of the twin network element when the first traffic information arrives at the twin network element, the transmission delay between the physical network element and the twin network element, and the reference delay The arrival time of the first traffic information in the meta record.

T=tn+Tmax-Tn;

Determine the transmission delay between each physical network element and the twin network element corresponding to the physical network element;

The maximum transmission delay is selected as the reference delay.

If multiple twin network elements are distributed in different physical entities, the physical entities use a precision time protocol (PTP) or a network time protocol (NTP) to implement time synchronization between each twin network element.

The embodiment of the present application also provides a digital twin network, including a memory, a processor, and a program stored on the memory and operable on the processor. When the processor executes the program, the above-mentioned Latency measurement method.

An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps in the delay measurement method as described above are implemented.

The above technical solution of the present application has at least the following beneficial effects:

In the delay measurement method, device, and digital twin network of the embodiments of the present application, the transmission delay of the traffic information between physical network elements is obtained according to the arrival time of the traffic information recorded by the twin network elements; in the delay measurement method, the physical The network does not need to send measurement packets, does not change the physical network, does not change service packets, does not require physical network elements to support time synchronization protocols, and can test all types of services with high delay measurement accuracy.

Description of drawings

Figure 1 shows a schematic diagram of the structure of the digital twin network;

FIG. 2 shows a flowchart of the steps of the delay measurement method provided in the embodiment of the present application;

FIG. 3 shows one of the schematic diagrams of the digital twin network corresponding to the delay measurement method provided in the embodiment of the present application;

FIG. 4 shows the second schematic diagram of the digital twin network corresponding to the delay measurement method provided by the embodiment of the present application;

FIG. 5 shows an example diagram of a delay measurement method provided in an embodiment of the present application;

FIG. 6 shows a schematic structural diagram of a delay measuring device provided in an embodiment of the present application;

Fig. 7 shows a schematic structural diagram of the digital twin network provided by the embodiment of the present application.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved in this application clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Figure 2, the embodiment of the present application provides a delay measurement method, which is applied to a digital twin network. The digital twin network includes: a physical network and a twin network, and each physical network element of the physical network is in the twin The network is provided with corresponding twin network elements; the method includes:

Step 201, through the delay deterministic network between the physical network element and the twin network element, the twin network element receives the first flow information transmitted by the physical network element; wherein, each of the twin network elements Realize time synchronization between twin network elements;

Step 202, the twin network element determines the transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.

In the embodiment of the present application, the traffic information transmission network between the physical network and the twin network uses a delay deterministic network, so that the traffic information transmission delay between each physical network element and its corresponding twin network element is constant. As shown in Figure 3, the transmission delay between physical network element 1 and twin network element 1 is T1, the transmission delay between physical network element 2 and twin network element 2 is T2, and the transmission delay between physical network element 3 and twin network element The transmission delay between NE 4 and twin NE 5 is T3, the transmission delay between physical NE 4 and twin NE 5 is T4, the transmission delay between physical NE n and twin NE n is Tn, and any of T1 to Tn The two transmission delays may be equal or not, but the respective values of T1-Tn are fixed. The twin network can calculate and determine the transmission delay T1~Tn of traffic information in advance.

It should be noted that, in this embodiment of the present application, the "arrival time of the first traffic information recorded by the twin network element" and "the local time of the twin network element when the first traffic information arrives at the twin network element" may be the same, or Can be different.

In at least one embodiment of the present application, the method further includes: when the twin network element arrives at the twin network element according to the first traffic information, the local time of the twin network element, the physical network element and The transmission delay and the reference delay between the twin network elements determine the arrival time of the first traffic information recorded by the twin network elements.

In some optional embodiments, the twin network element is configured according to the local time of the twin network element when the first traffic information arrives at the twin network element, the distance between the physical network element and the twin network element The transmission delay and the reference delay determine the arrival time of the first flow information recorded by the twin network element, including:

T=tn+Tmax-Tn;

For example, as shown in Figure 3, when physical network element 1 transmits the first traffic information to twin network element 1, the local time of twin network element 1 is t1, and the transmission delay is T1, then twin network element 1 records The arrival time of the first traffic information is: t1+Tmax-T1 (instead of the local time t1 at this time, that is, the local time t1 is delayed by Tmax-T1); similarly, the arrival time of the first traffic information recorded by other twin network elements is tn+Tmax-Tn. Finally, the twin network elements calculate the transmission delay of the first flow information between physical network elements according to the recorded arrival time of the first flow information.

As at least one optional embodiment of the present application, the method further includes: the twin network element determining the transmission delay between each physical network element and the twin network element corresponding to the physical network element; selecting the largest transmission delay as the reference delay.

For example, the twin network calculates the traffic information transmission delays T1~Tn in advance, and selects the maximum delay Tmax as the reference delay, as shown in Figure 3, T3 is the maximum delay Tmax.

As another optional embodiment, time synchronization is implemented between the twin network elements in the twin network. If different twin network elements are carried in the same physical entity, such as deployed in the same server, they share a local clock. The network elements are time-synchronized; and if multiple twin network elements are distributed in different physical entities, the method also includes: using the Precise Time Protocol (Precise Time Protocol, PTP) or Network Time Protocol (Network Time Protocol) between the physical entities , NTP) to realize the time synchronization between each twin network element.

As an optional embodiment, step 202 includes: determining the first traffic information according to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element. A transmission delay of traffic information between the first physical network element and the second physical network element; wherein, the first physical network element corresponds to the first twin network element, and the second physical network element corresponds to the first twin network element Corresponding to the second twin network element described above.

Optionally, according to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element, the first traffic information is determined at The transmission delay between a physical network element and the second physical network element includes: determining that the transmission delay of the first traffic information between the first physical network element and the second physical network element is: the second twin network The difference between the arrival time of the first traffic information recorded by the element and the arrival time of the first traffic information recorded by the first twin network element.

For example, as shown in FIG. 3 and FIG. 4, when a data packet of the first traffic information arrives at physical network element 1, physical network element 1 transmits the first traffic information to twin network element 1, and the transmission delay is T1, At this time, the local time of twin network element 1 is t1, and the arrival time of the first traffic information recorded by twin network element 1 is: t1+Tmax-T1;

As shown in Figure 3 and Figure 4, after the physical network element 2 detects the arrival of the same data packet (that is, the first traffic information), it reaches the twin network element 2 after a delay of T2, and the local time of the twin network element 2 is t2 , the arrival time of the first traffic information recorded by twin network element 2 is: t2+Tmax-T2, then (t2+Tmax-T2)-(t1+Tmax-T1) is the first traffic information between twin network element 1 and twin The one-way transmission delay between network elements 2 is also the one-way delay of the first flow information from physical network element 1 to physical network element 2 .

Similarly, as shown in Figure 3 and Figure 4, the data packet passes through the physical network element n, and the first traffic information of the physical network element n reaches the twin network element n after a delay Tn, and the local time of the twin network element n is tn, then The arrival time of the first traffic information recorded by the twin network element n is: tn+Tmax-Tn, then (tn+Tmax-Tn)-(t1+Tmax-T1) is the distance from physical network element 1 to physical network element in the physical network The one-way transmission delay of n.

So far, through the arrival time of the traffic information recorded by the twin network elements, the transmission delay of the traffic information in the physical network elements is obtained. During the measurement process, only the time synchronization of the twin network elements is required, and the time synchronization of the physical network elements is not required. The delay measurement accuracy depends on the time synchronization accuracy of twin network elements. If the PTP synchronization protocol is used, the delay measurement accuracy can reach the nanosecond level.

As shown in Figure 5, the delay measurement method includes:

1: Modeling based on the physical network to build a digital twin network;

2: Realize time synchronization between twin network elements in the twin network;

If different twin NEs are hosted in the same physical entity, such as deployed in the same server, they share a local clock, and the time between twin NEs is synchronized;

If different twin network elements are distributed in different physical entities, use PTP or NTP to realize time synchronization between physical entities, so as to realize time synchronization of all twin network elements;

3: The traffic information transmission network from the physical network to the twin network uses a delay deterministic network to ensure that the traffic information transmission delay between each physical network element and the twin network element is fixed;

4: The twin network calculates the traffic information transmission delays T1~Tn in advance, and selects the maximum delay Tmax as a benchmark, as shown in Figure 3, T3 is the maximum delay Tmax. When the physical network element 1 transmits the traffic information to the twin network element 1, the local time of the twin network element 1 is t1, and the transmission delay is T1, then the arrival time of the traffic information recorded by the twin network element is t1+Tmax-T1, and It is not the local time t1 at this time, that is, it is delayed by Tmax-T1; similarly, the arrival time of traffic information recorded by other twin network elements is tn+Tmax-Tn. Finally, the twin network elements calculate the transmission delay of traffic between physical network elements based on the arrival time of the traffic information.

In summary, the embodiment of the present application obtains the transmission delay of the traffic information between physical network elements according to the arrival time of the traffic information recorded by the twin network elements; in this delay measurement method, the physical network does not need to send measurement messages and does not change The physical network does not change service packets, does not require physical network elements to support time synchronization protocols, and can test all types of services, with high delay measurement accuracy.

As shown in Figure 6, the embodiment of the present application also provides a delay measurement device, which is applied to a digital twin network, and the digital twin network includes: a physical network and a twin network, and each physical network element of the physical network is in the Twin networks are provided with corresponding twin network elements; the device includes:

The receiving module 601 is configured to receive the first traffic information transmitted by the physical network element through the delay deterministic network between the physical network element and the twin network element; wherein, each twin network of the twin network Realize time synchronization between elements;

The determining module 602 is configured to determine a transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.

As an optional embodiment, the device further includes: a time determination module configured to, according to the local time of the twin network element when the first traffic information arrives at the twin network element, the physical network element and the The transmission delay and the reference delay between twin network elements determine the arrival time of the first flow information recorded by the twin network elements.

As an optional embodiment, the time determination module includes: a time determination submodule configured to determine the arrival time of the first traffic information recorded by the twin network element according to a first formula; wherein, the first The formula is:

T=tn+Tmax-Tn;

As an optional embodiment, the device further includes: a first delay determination module configured to determine a transmission delay between each physical network element and a twin network element corresponding to the physical network element;

The second delay determination module is configured to select the largest transmission delay as the reference delay.

As an optional embodiment, if multiple twin network elements are distributed in different physical entities, the device further includes: a time synchronization module configured to use PTP or NTP between physical entities to implement time synchronization between twin network elements.

As an optional embodiment, the determining module includes: a first determining submodule configured to, according to the arrival time of the first traffic information recorded by the first twin network element and the first flow information recorded by the second twin network element The arrival time of the traffic information, determining the transmission delay of the first traffic information between the first physical network element and the second physical network element; wherein, the first physical network element corresponds to the first twin network element , the second physical network element corresponds to the second twin network element.

As an optional embodiment, the first determining submodule includes: a determining unit configured to determine that the transmission delay of the first traffic information between the first physical network element and the second physical network element is: the second The difference between the arrival time of the first traffic information recorded by the twin network element and the arrival time of the first traffic information recorded by the first twin network element.

In the embodiment of the present application, the transmission delay of the traffic information between the physical network elements is obtained according to the arrival time of the traffic information recorded by the twin network elements; in the delay measurement method, the physical network does not need to send measurement messages, does not change the physical network, It does not change service packets, does not require physical network elements to support time synchronization protocols, and can test all types of services, with high delay measurement accuracy.

It should be noted that the delay measurement device provided in the embodiment of the present application is a device capable of performing the above delay measurement method, and all embodiments of the above delay measurement method are applicable to the device, and can achieve the same or similar Beneficial effect.

As shown in Figure 7, the embodiment of the present application also provides a digital twin network, the digital twin network includes: a physical network and a twin network, and each physical network element of the physical network is provided with a corresponding Twin network element; the twin network element includes a processor 700 and a transceiver 710, the transceiver 710 receives and sends data under the control of the processor 700, and the processor 700 is used to perform the following operations: through the physical The delay deterministic network between the network element and the twin network element receives the first traffic information transmitted by the physical network element; wherein, time synchronization is implemented between each twin network element of the twin network; according to at least two The arrival time of the first traffic information recorded by two twin network elements, and determine the transmission delay of the first traffic information between the physical network elements.

As an optional embodiment, the processor 700 is further configured to perform the following operations: according to the local time of the twin network element when the first traffic information arrives at the twin network element, the physical network element and the The transmission delay and the reference delay between twin network elements determine the arrival time of the first flow information recorded by the twin network elements.

As an optional embodiment, the processor 700 is further configured to perform the following operation: according to a first formula, determine the arrival time of the first traffic information recorded by the twin network element; wherein, the first formula is :

T=tn+Tmax-Tn;

As an optional embodiment, the processor 700 is further configured to perform the following operations: determine the transmission delay between each physical network element and the twin network element corresponding to the physical network element; select the maximum transmission delay as the Baseline delay.

As an optional embodiment, the processor 700 is further configured to perform the following operations: if multiple twin network elements are distributed in different physical entities, the physical entities use PTP or NTP to implement time synchronization between twin network elements.

As an optional embodiment, the processor 700 is further configured to perform the following operations: according to the arrival time of the first traffic information recorded by the first twin network element and the first traffic information recorded by the second twin network element The arrival time of the first traffic information is determined between the first physical network element and the second physical network element; wherein, the first physical network element corresponds to the first twin network element, and the The second physical network element corresponds to the second twin network element.

As an optional embodiment, the processor 700 is further configured to perform the following operation: determine that the transmission delay of the first traffic information between the first physical network element and the second physical network element is: the second twin network The difference between the arrival time of the first traffic information recorded by the element and the arrival time of the first traffic information recorded by the first twin network element.

It should be noted that the digital twin network provided by the embodiment of the present application is a digital twin network capable of performing the above delay measurement method, and all embodiments of the above delay measurement method are applicable to the digital twin network, and can achieve the same or similar beneficial effects.

The embodiment of the present application also provides a digital twin network, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the program, the above-mentioned Each process in the embodiment of the time delay measurement method can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, each process in the above-mentioned embodiment of the delay measurement method can be achieved, and the same technology can be achieved. Effect, in order to avoid repetition, will not repeat them here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems or computer program products. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a means for realizing the functions specified in one or more procedures and/or one or more blocks of the flowchart.

These computer program instructions may also be stored in a computer-readable storage medium capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable storage medium produce a paper product comprising instruction means, The instruction means implements the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device Steps are provided for realizing the functions specified in the flow chart or flow charts and/or block diagram block or blocks.

The above description is a preferred embodiment of the present application, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principles described in the application. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims

A delay measurement method applied to a digital twin network, the digital twin network comprising: a physical network and a twin network, each physical network element of the physical network is provided with a corresponding twin network element in the twin network; The methods described include:

Through the delay deterministic network between the physical network element and the twin network element, the twin network element receives the first flow information transmitted by the physical network element; wherein, each twin network element of the twin network Realize time synchronization between;

The twin network element determines a transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.
The method according to claim 1, wherein the method further comprises:

The twin network element, according to the local time of the twin network element when the first traffic information arrives at the twin network element, the transmission delay between the physical network element and the twin network element, and a reference delay, Determine the arrival time of the first traffic information recorded by the twin network element.
The method according to claim 2, wherein the twin network element is based on the local time of the twin network element when the first traffic information arrives at the twin network element, the physical network element and the twin network element Determining the arrival time of the first traffic information recorded by the twin network element, including:

According to a first formula, determine the arrival time of the first traffic information recorded by the twin network element; wherein, the first formula is:

T=tn+Tmax-Tn;

Wherein, T is the arrival time of the first traffic information recorded by the twin network element, tn is the local time of the twin network element when the first traffic information arrives at the twin network element, and Tmax is the reference Delay, Tn is the transmission delay between the physical network element and the twin network element.
The method according to claim 2 or 3, wherein the method further comprises:

The twin network element determines the transmission delay between each physical network element and the twin network element corresponding to the physical network element;

The maximum transmission delay is selected as the reference delay.
The method according to claim 1, wherein, if multiple twin network elements are distributed in different physical entities, the method further comprises:

The precise time protocol PTP or network time protocol NTP is used between physical entities to realize time synchronization between twin network elements.
The method according to claim 1, wherein the twin network element determines that the first traffic information is between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements transmission delay, including:

According to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element, determine that the first traffic information is between the first physical network element and the second network element. Transmission delay between two physical network elements; wherein, the first physical network element corresponds to the first twin network element, and the second physical network element corresponds to the second twin network element.
The method according to claim 6, wherein the determination is made according to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element. The transmission delay of the first flow information between the first physical network element and the second physical network element includes:

Determining the transmission delay of the first traffic information between the first physical network element and the second physical network element is: the arrival time of the first traffic information recorded by the second twin network element is different from that recorded by the first twin network element The difference between the arrival times of the first traffic information.
A delay measurement device, applied to a digital twin network, the digital twin network comprising: a physical network and a twin network, each physical network element of the physical network is provided with a corresponding twin network element in the twin network; Said devices include:

The receiving module is configured to receive the first traffic information transmitted by the physical network element through the delay deterministic network between the physical network element and the twin network element; wherein, each twin network element of the twin network Realize time synchronization between;

The determination module is configured to determine the transmission delay of the first traffic information between the physical network elements according to the arrival time of the first traffic information recorded by at least two twin network elements.
A digital twin network, the digital twin network includes: a physical network and a twin network, each physical network element of the physical network is provided with a corresponding twin network element in the twin network; the twin network element includes a processor and a transceiver that receives and transmits data under the control of a processor configured to:

Receive the first traffic information transmitted by the physical network element through the delay deterministic network between the physical network element and the twin network element; wherein, time synchronization is realized between each twin network element of the twin network ;

The transmission delay of the first traffic information between the physical network elements is determined according to the arrival time of the first traffic information recorded by at least two twin network elements.
The digital twin network according to claim 9, wherein the processor is further configured to perform the following operations: according to the local time of the twin network element when the first traffic information arrives at the twin network element, the physical The transmission delay and the reference delay between the network element and the twin network element determine the arrival time of the first flow information recorded by the twin network element.
The digital twin network according to claim 10, wherein the processor is further configured to perform the following operations: according to a first formula, determine the arrival time of the first traffic information recorded by the twin network element; wherein, the The first formula is:

T=tn+Tmax-Tn;

Wherein, T is the arrival time of the first traffic information recorded by the twin network element, tn is the local time of the twin network element when the first traffic information arrives at the twin network element, and Tmax is the reference Delay, Tn is the transmission delay between the physical network element and the twin network element.
The digital twin network according to claim 10 or 11, wherein the processor is further configured to perform the following operations: determine the transmission delay between each physical network element and the twin network element corresponding to the physical network element; select the maximum The transmission delay of is used as the reference delay.
The digital twin network according to claim 9, wherein the processor is further configured to perform the following operations: if multiple twin network elements are distributed in different physical entities, the precision time protocol PTP or network time protocol NTP is used between the physical entities Realize time synchronization between twin network elements.
The digital twin network according to claim 9, wherein the processor is further configured to perform the following operations: according to the arrival time of the first traffic information recorded by the first twin network element and the arrival time of the first traffic information recorded by the second twin network element The arrival time of the first traffic information, and determine the transmission delay of the first traffic information between the first physical network element and the second physical network element; wherein, the first physical network element is the first twin The network element corresponds, and the second physical network element corresponds to the second twin network element.
The digital twin network according to claim 14, wherein the processor is further configured to perform the following operations: determine that the transmission delay of the first traffic information between the first physical network element and the second physical network element is : the difference between the arrival time of the first traffic information recorded by the second twin network element and the arrival time of the first traffic information recorded by the first twin network element.
A digital twin network, comprising a memory, a processor, and a program stored on the memory and operable on the processor; when the processor executes the program, it realizes any one of claims 1-7 The delay measurement method described above.
A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps in the delay measurement method according to any one of claims 1-7 are implemented.