WO2020259112A1

WO2020259112A1 - Method for measuring transmission time delay and related device

Info

Publication number: WO2020259112A1
Application number: PCT/CN2020/090075
Authority: WO
Inventors: 任惠琴
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-06-24
Filing date: 2020-05-13
Publication date: 2020-12-30
Also published as: CN112134747A

Abstract

Disclosed are a method for measuring a transmission time delay and a related device. One of the methods comprises: a destination end routing device receiving a first IP data message sent by a source end routing device, wherein the first IP data message carries a first timestamp of the source end routing device sending the first IP data message; and calculating, according to the first timestamp and a second timestamp of the destination end routing device receiving the first IP data message, a unidirectional time delay from the source end routing device to the destination end routing device.

Description

Method for detecting transmission time delay and related equipment

Cross references to related applications

This application is filed based on a Chinese patent application with an application number of 201910550657.8 and an application date of June 24, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by way of introduction.

Technical field

The embodiments of the present application relate to but not limited to Ethernet technology, and more specifically relate to a method and related equipment for detecting transmission delay.

Background technique

The current Ethernet technology has been widely used in transmission systems due to its good economy, interoperability and ease of use. With the rapid development of carrier-grade Ethernet technology and standards, Ethernet gradually extends to metropolitan area networks and wide area networks, and then provides multi-service bearer as a carrier-grade transmission technology. The complexity of Ethernet technology in network operations continues to increase, and the functions continue to increase. The core data exchange technology has developed from simple circuit switching to layer two switching, and gradually developed from layer two switching to today's more mature layer three switching. The Ethernet network level puts forward different requirements on the security and manageability of the system. In order to provide users of different network layers of Ethernet with easy operation and powerful fault management and performance detection capabilities, the OAM (Operation Administration and Management, operation, management, and maintenance) functions of each layer are the focus of current research. Among them, the network delay is the time taken for the message to be transmitted in the transmission medium, that is, the time from when the message starts to enter the network to when it leaves the network, in milliseconds (ms) or microseconds (us). The delay measurement is related to the following parameters: port rate, interface type, transmission distance, forwarding mode and buffering mode. Nowadays, many applications, especially 5G commercial applications, have become very sensitive to delay performance. Therefore, it is necessary to know how much delay performance the actual Ethernet network can provide.

Currently, there are two main delay detection methods used in Ethernet Layer 3 OAM:

1. Ping (Packet Internet Grope, Internet packet explorer) mode: only supports two-way delay measurement. Ping operation uses the ICMP (Internet Control Message Protocol) protocol provided by the TCP (Transmission Control Protocol)/IP (Internet Protocol) protocol, and you can get two pieces of information immediately. The first is Whether the destination host is still operating normally, the second is the time of the data packet back and forth, that is, the network delay. The working principle of ping: After sending an Echo Request (response request) message to the target host, it listens and waits for the Echo Reply (response response) response of the target host. If the target host does not respond after a specified time, It is considered that the destination host is "Time out".

2. DMM (Delay Measurement Message Delay Measurement Message)/DMR (Delay Measurement Reply, Delay Measurement Reply) message mode in CFM ((Connectivity Fault Management) (Connectivity Fault Management): supports one-way and two-way delay measurement 。DMM/DMR messages are sent with local time stamps. Working principle: The source periodically sends DMM messages to the destination. After receiving the DMM messages, the destination directly calculates the single-ended delay through the time stamp information. , Or return a DMR message to the source, and the source calculates the two-way delay.

However, both of the above methods have drawbacks:

1. For Ping mode, ping the IP address configured on the network device on the host, because generally higher-end network devices will be protected by the CPU (Central Processing Unit) of the control layer, and the response processing of this ping packet is prioritized The level is very low, so this delay test value will generally be high and even packet loss will occur, but this does not actually reflect the real network performance, and on many network devices, IP packets with option fields need to be sent. CPU processing will also cause high latency in the test;

2. For the DMM/DMR message mode, DMM/DMR control messages and data service messages share the transmission channel. When traffic is congested or overloaded, it is easy to be subject to QoS (Quality of Service, quality of service) adjustment speed limit or even discarded. This affects the accuracy of delay statistics.

Summary of the invention

In view of this, an embodiment of the present application provides a method for detecting transmission delay, including: a destination routing device receives a first IP data packet sent by a source routing device, and the first IP data packet carries the The source-end routing device sends the first time stamp of the first IP data message; according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message, calculate the slave The one-way transmission delay from the source-end routing device to the destination-end routing device; or, sending a second IP data packet to the source-end routing device, the second IP data packet carrying the first time stamp, The destination routing device receives the second time stamp of the first IP data packet and the destination routing device sends the third time stamp of the second IP data packet, so that the source routing device can follow The first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data packet are used to calculate a two-way transmission delay.

An embodiment of the present application also provides a method for detecting transmission delay, including: a source-end routing device sends a first IP data packet to a destination-end routing device, where the first IP data packet carries the source-end routing device Sending the first time stamp of the first IP data message, so that the destination routing device calculates according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message The one-way transmission delay from the source-end routing device to the destination-end routing device.

An embodiment of the present application also provides a method for detecting transmission delay, including: a source-end routing device sends a first IP data packet to a destination-end routing device, where the first IP data packet carries the source-end routing device Sending the first time stamp of the first IP data message; receiving a second IP data message sent by the destination routing device, the second IP data message carrying the first time stamp and the destination The end routing device receives the second time stamp of the first IP data message and the third time stamp of the destination routing device sending the second IP data message; according to the first time stamp and the first time stamp The second time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data message to calculate a two-way transmission delay.

An embodiment of the present application also provides a destination routing device, including: a receiving unit, a computing unit, or a sending unit; the receiving unit is configured to receive a first IP data packet sent by the source routing device, and the first The IP data message carries the first time stamp of the first IP data message sent by the source-end routing device; the calculation unit is configured to receive the first time stamp according to the first time stamp and the destination-end routing device The second time stamp of the first IP data packet is used to calculate the one-way transmission delay from the source-end routing device to the destination-end routing device; the sending unit is configured to send the second IP datagram to the source-end routing device The second IP data packet carries the first time stamp, the second time stamp at which the destination routing device receives the first IP data packet, and the destination routing device sends the second time stamp. The third time stamp of the IP data packet, so that the source routing device receives the second time stamp according to the first time stamp, the second time stamp, the third time stamp, and the source routing device The fourth time stamp of the IP data message calculates the two-way transmission delay.

An embodiment of the present application also provides a source-end routing device, including: a sending unit, configured to send a first IP data packet to a destination-end routing device, where the first IP data packet carries the source-end routing device to send The first time stamp of the first IP data message, so that the destination routing device calculates all the data based on the first time stamp and the second time stamp of the destination routing device receiving the first IP data message The one-way transmission delay from the source-end routing device to the destination-end routing device.

An embodiment of the present application also provides a source-end routing device, including: a sending unit, configured to send a first IP data packet to a destination-end routing device, where the first IP data packet carries the source-end routing device to send The first time stamp of the first IP data message; a receiving unit, configured to receive a second IP data message sent by the destination routing device, the second IP data message carrying the first time stamp , The destination routing device receives the second time stamp of the first IP data message and the destination routing device sends the third time stamp of the second IP data message; the calculation unit is configured to The first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data packet are used to calculate a two-way transmission delay.

An embodiment of the present application also provides a destination routing device, including: a second port for receiving a first IP data packet sent by a source routing device and recording that the destination routing device receives the first IP data The second time stamp of the message, the first IP data message carries the first time stamp of the first IP data message sent by the source routing device; the second processing unit is configured to The time stamp and the second time stamp are used to calculate the one-way transmission delay from the source-end routing device to the destination-end routing device; or, to combine the first time stamp, the second time stamp, and the second time stamp. The third time stamp of the IP data message is loaded into the unused field of the second IP data message, and the header length, total packet length, and header checksum of the IP header of the second IP data message are updated, After that, MAC (media access control, media access control) layer encapsulation is performed, and the second IP data packet is sent to the source routing device through the second port, so that the source routing device according to the first A timestamp, the second timestamp, the third timestamp, and the fourth timestamp of the source-end routing device receiving the second IP data packet to calculate a two-way transmission delay.

An embodiment of the present application also provides a source-end routing device, including: a first port and a first processing unit; the first processing unit is configured to send the source-end routing device to the first IP data packet A timestamp is loaded into the unused field of the first IP data message, and the header length, total packet length, and header checksum of the IP header of the first IP data message are updated, and then the MAC layer Encapsulation, and then send the first IP data message to the destination routing device through the first port, so that the destination routing device receives the first IP data according to the first time stamp and the destination routing device The second time stamp of the message calculates the one-way transmission delay from the source-end routing device to the destination-end routing device.

An embodiment of the present application also provides a source-side routing device, including: a first port and a first processing unit; the first processing unit is configured to load the first time stamp into the first IP datagram In the unused field of the message, update the header length, total packet length, and header checksum of the IP header of the first IP data message, then perform MAC layer encapsulation, and then send it to the destination through the first port The routing device sends a first IP data packet; the first port is also used to receive a second IP data packet sent by the destination routing device, and record that the source routing device receives the second IP data The fourth time stamp of the message; the second IP data message carries the first time stamp, the second time stamp, and the third time when the destination routing device sends the second IP data message Stamp; the first processing unit is also used to de-MAC encapsulate and parse the second IP data message to obtain the first time stamp, the second time stamp, and the third time stamp, according to the The first time stamp, the second time stamp, the third time stamp, and the fourth time stamp are used to calculate the two-way transmission delay.

The embodiment of the present application also provides a destination routing device, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The method for detecting the transmission delay executed by the routing device at the destination end is realized.

An embodiment of the present application also provides a source-side routing device, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The method for detecting transmission delay executed by the source-end routing device is implemented.

The embodiment of the present application also provides a computer-readable storage medium having an information processing program stored on the computer-readable storage medium, and when the information processing program is executed by a processor, the detection of the transmission delay described in any one of the above is implemented Steps of the method.

Other features and advantages of the present application will be described in the following description, and partly become obvious from the description, or understood by implementing the present application. The purpose and other advantages of the application can be realized and obtained through the structures specifically pointed out in the description, claims and drawings.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

FIG. 1 is a schematic flowchart of a method for detecting transmission delay according to an embodiment of the application;

2 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application;

3 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of the application;

4 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application;

FIG. 5 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application;

FIG. 6(a) is a schematic diagram of the IP header structure of an IPv4 packet in an embodiment of the application;

Figure 6(b) is a schematic diagram of the message structure of an IPv6 message in an embodiment of the application;

FIG. 7 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application;

FIG. 8 is a schematic structural diagram of a system for detecting transmission delay according to an embodiment of the application;

9 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application;

FIG. 10 is a schematic structural diagram of a destination routing device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of a source routing device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of a source routing device provided by another embodiment of this application;

FIG. 13 is a schematic structural diagram of a destination routing device provided by another embodiment of this application;

FIG. 14 is a schematic structural diagram of a source-end routing device provided by another embodiment of this application;

FIG. 15 is a schematic structural diagram of a source routing device provided by another embodiment of this application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

The steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer-executable instructions. And, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than here.

FIG. 1 is a schematic flowchart of a method for detecting transmission delay according to an embodiment of the application. As shown in FIG. 1, the method includes:

Step 101: The destination-end routing device receives a first IP data packet sent by the source-end routing device, where the first IP data packet carries a first time stamp of the first IP data packet sent by the source-end routing device ；

Step 102: Calculate a one-way transmission delay from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp of the destination-end routing device receiving the first IP data packet;

Alternatively, in step 103, a second IP data packet is sent to the source-end routing device, where the second IP data packet carries the first timestamp, and the destination-end routing device receives the first IP datagram The second timestamp of the message and the third timestamp of the second IP data message sent by the destination-end routing device, so that the source-end routing device according to the first time stamp, the second time stamp, The third time stamp and the fourth time stamp of the source-end routing device receiving the second IP data packet are used to calculate a two-way transmission delay.

Wherein, the first time stamp, the second time stamp or the third time stamp is carried in an unused field of the IP packet.

FIG. 2 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of the application. As shown in FIG. 2, the method includes:

Step 201: The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries the first timestamp of the first IP data packet sent by the source-end routing device. So that the destination routing device calculates the order from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data packet. To the transmission delay.

Wherein, the first time stamp is carried in the unused field of the IP packet.

FIG. 3 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of the application. As shown in FIG. 3, the method includes:

Step 301: The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries a first time stamp of the first IP data packet sent by the source-end routing device;

Step 302: Receive a second IP data packet sent by the destination routing device, where the second IP data packet carries the first time stamp, and the destination routing device receives the first IP data packet And the third time stamp of the second IP data packet sent by the destination routing device;

Step 303: According to the first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data packet, calculate the two-way transmission time Extension.

FIG. 4 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application.

The application scenario in this embodiment is one-way transmission delay detection.

As shown in Figure 4, the method includes:

Step 401: The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries a first time stamp of the first IP data packet sent by the source-end routing device;

Wherein, the first timestamp may be carried in an unused field of the first IP data message. For example, when the first IP data message is an IPv4 message, the first timestamp may be carried in IPv4 The option field reserved in the packet header or the unused part of the IP packet data segment. When the first IP data message is an IPv6 message, the first time stamp is carried in an IPv6 extension header or an unused part of the IP message data segment.

Specifically, the processing unit of the source-end routing device can extract the local time information, load the timestamp information into the unused field of the IP packet before forwarding the packet to the port of the source-end routing device, and then send it to the unused field through the source-end port. The destination port is forwarded out.

Step 402: The destination routing device receives the first IP data message, and calculates the slave according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message The one-way transmission delay from the source-end routing device to the destination-end routing device.

Specifically, after the port of the destination routing device receives the first IP data packet, it records the second timestamp of the destination routing device receiving the first IP data packet. Then, the processing unit of the destination routing device parses the first IP data message to obtain the first time stamp, and compares it with the local receiving time stamp, that is, the second time stamp, thereby calculating the route from the source routing device to the destination The one-way transmission delay value of the device, that is, the one-way transmission delay value=the second time stamp-the first time stamp.

FIG. 5 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application.

The application scenario in this embodiment is two-way transmission delay detection.

As shown in Figure 5, the method includes:

Step 501: The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries the first timestamp of the first IP data packet sent by the source-end routing device;

Specifically, the processing unit of the source-end routing device can extract the local time information, and load the time stamp information into the unused field of the IP packet header before forwarding the packet to the port of the source-end routing device, and then pass it through the source port Forward to the destination port, that is, send to the destination routing device.

Step 502: The destination routing device receives the first IP data packet, and records a second timestamp when the destination routing device receives the first IP data packet;

Specifically, after the port of the destination routing device receives the first IP data packet, it records the second timestamp of the destination routing device receiving the first IP data packet.

Step 503: The destination routing device sends a second IP data packet to the source routing device, where the second IP data packet carries the first time stamp, the second time stamp, and the destination The third timestamp of the end routing device sending the second IP data packet;

Specifically, the processing unit of the destination routing device may load the first timestamp, the second timestamp, and the local sending time of the second IP data packet, that is, the third timestamp to the second IP In the unused field of the data message; then forwarded through the port of the destination routing device, that is, sent to the source routing device.

Wherein, the timestamp may be carried in an unused field of the IP data message. For example, when the second IP data message is an IPv4 message, the timestamp is carried in an option field reserved in the IPv4 header or the IP message. The unused part of the text data segment. When the second IP data message is an IPv6 message, the timestamp is carried in an IPv6 extension header or an unused part of the IP message data segment.

Step 504: The source-end routing device receives the second IP data packet, and receives the second IP data message according to the first time stamp, the second time stamp, the third time stamp, and the source-end routing device The fourth time stamp of the second IP data message calculates the two-way transmission delay.

Specifically, after the port of the source-end routing device receives the second IP data packet, it records the fourth time stamp of the source-end routing device receiving the second IP data packet. Then, the processing unit of the source-end routing device parses the second IP data packet to obtain the first time stamp, the second time stamp, and the third time stamp, and the local reception time stamp, that is, the fourth time stamp. Time stamps are compared, and the two-way transmission delay is calculated, that is, the two-way transmission delay value = (fourth time stamp-first time stamp)-(third time stamp-second time stamp).

In another embodiment of the present application, when the transmitted IP data message is an IPv4 message, the IP header structure is shown in Figure 6(a), and the option option reserved for the data service IP header can be used The field stores timestamp information. When the transmitted IP data message is an IPv6 message, the data structure of the IP message is shown in Figure 6(b). The extended header of the IP message or the unused part of the data part can be used to store the time stamp information.

For example, when only one-way time delay needs to be calculated, in the option field of the IP header or the unused part of the data segment, 1-2 8-byte spaces are required to store the one-way time of the routing devices at both ends stamp:

Uint64 TxTimef, //The source routing device sends the time stamp

Uint64 RxTimef,//The destination routing device receives the timestamp

When you need to calculate the two-way time delay, in the option field of the IP header or the unused part of the data segment, 3-4 8-byte spaces are required to store the two-way time stamps of the routing devices at both ends:

Uint64 TxTimef, //The source routing device sends the time stamp

Uint64 RxTimef,//The destination routing device receives the timestamp

Uint64 TxTimeb, //The destination routing device sends the timestamp

Uint64 RxTimeb, //The source routing device receives the time stamp

FIG. 7 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of the application.

The application scenario in this embodiment is one-way transmission delay detection. This embodiment is applied to the system architecture shown in FIG. 8. As shown in FIG. 8, the source routing device 1 includes a processing unit 101 and a port 102. The destination routing device includes a processing unit 201 and a port 202, and the ports 102 and 202 communicate with each other to transmit data.

As shown in Figure 7, the method includes:

In step 701, when the source-end routing device forwards the first IP packet to the destination-end routing device, the processing unit 101 of the source-end routing device 1 extracts local real-time time information TxTimef, and loads this time stamp TxTimef into the unused IP packet Field

For example, when the first IP data packet is an IPv4 packet, the timestamp TxTimef is carried in an option field reserved in the IPv4 packet header or an unused part of the IP packet data segment. When the first IP data message is an IPv6 message, the timestamp TxTimef is carried in an IPv6 extension header or an unused part of the IP message data segment.

Step 702: The processing unit 101 updates the header length/total packet length/header checksum of the IP header, then performs MAC layer encapsulation, and forwards the first IP message to port 202 of the destination routing device through port 102;

Step 703: After the port 202 of the destination routing device receives the first IP message, it records the message reception timestamp RxTimef, and the processing unit 201 of the destination routing device de-MAC encapsulates, parses the IP message, and obtains the message header The source timestamp TxTimef in here;

Step 704: The processing unit 201 calculates a one-way delay value by using RxTimef-TxTimef according to the received message timestamp RxTimef and the source sending timestamp TxTimef.

Among them, the one-way delay value = RxTimef-TxTimef.

Among them, the one-way delay measurement requires strict synchronization of the source and destination clocks.

FIG. 9 is a schematic flowchart of a method for detecting transmission delay according to another embodiment of this application.

The application scenario in this embodiment is two-way transmission delay detection. This embodiment is applied to the system architecture shown in FIG. 8. As shown in FIG. 8, the source routing device 1 includes a processing unit 101 and a port 102. The destination routing device includes a processing unit 201 and a port 202, and the ports 102 and 202 communicate with each other to transmit data.

As shown in Figure 9, the method includes:

Step 901: When the source-end routing device forwards the first IP packet to the destination-end routing device, the processing unit 101 of the source-end routing device 1 extracts local real-time time information TxTimef, and loads this time stamp TxTimef into the unused IP packet Field

Step 902, the processing unit 101 updates the header length/total packet length/header checksum of the IP header, then performs MAC layer encapsulation, and forwards the first IP message to port 202 of the destination routing device through port 102;

Step 903: After the port 202 of the destination routing device receives the first IP message, it records the message receiving timestamp RxTimef, and the processing unit 201 of the destination routing device de-MAC encapsulates, parses the IP message, and obtains the message header The source timestamp TxTimef in here;

Step 904: The processing unit 201 loads the source time stamp TxTimef, the receiving time stamp RxTimef, and the local sending time stamp TxTimeb together into the unused field of the second IP data message;

Step 905: The processing unit 201 updates the header length/total packet length/header checksum of the IP header of the second IP data packet, and then performs MAC layer encapsulation; and forwards the IP to the source-end routing device 102 port through port 202 Message out

Step 906: After the port 102 of the source-side routing device receives the second IP message, it records the message source receiving timestamp RxTimeb, and the processing unit 101 de-MAC encapsulates, parses the IP message, and obtains the message header The source sends a time stamp TxTimef, the destination receives a time stamp RxTimef, and the destination sends a time stamp TxTimeb;

In step 907, the processing unit 101 calculates a two-way delay value according to the source sending TxTimef/receiving time RxTimeb and the destination sending TxTimeb/receiving time RxTimef.

Among them, the two-way delay value=(RxTimeb-TxTimef)-(TxTimeb-RxTimef).

In another embodiment of the present application, the foregoing method for detecting transmission delay can be implemented using interrupt trigger software or in a hardware module. For example, the

processing unit

101 or 201 can be implemented using a dedicated chip or a hardware logic processor.

In another embodiment of the present application, in order to ensure the correctness of the delay detection during the double-ended delay test, the source router should store the sending timestamp and check the message when it receives the return message from the destination. Whether the TxTimef in here belongs to the previously stored transmission timestamp, if so, calculate the two-way delay value. Otherwise, the message will be considered invalid and discarded.

In the technical solution provided by the foregoing embodiment of the present application, the delay detection is performed based on the data message, so the internal test requires the data flow to run normally for the delay. If it is a two-way delay test, the data traffic is required to run normally in both directions. And in the delay detection process, the local real-time time needs to be collected and quickly loaded into the message and forwarded; when the message is received, the local reception real-time time needs to be recorded quickly, and the delay value at both ends needs to be calculated. Any delay processing in the middle will affect the accuracy of delay detection. Therefore, the collection and processing of time information is best implemented by dedicated hardware logic or chips.

The technical solution provided by the embodiment of the application adopts the method of storing the time stamp in the unused field reserved in the data service IP message to realize the one-way or two-way delay measurement, which is similar to the prior art Ping mode and DMM/DMR mode. Compared with, the service channel is not occupied by the special delay detection packet, which saves the resources of the Ethernet data service transmission channel and improves the efficiency of the service channel. Moreover, this field is a part of the IP header and has priority in the digital service processor The level is higher, and the source route and destination route respond in a timely manner, which greatly improves the accuracy of delay measurement.

FIG. 10 is a schematic structural diagram of a destination routing device according to an embodiment of the application. As shown in FIG. 10, the destination routing device includes a receiving unit, and also includes a calculation unit and/or a sending unit;

The receiving unit is configured to receive a first IP data message sent by a source-end routing device, where the first IP data message carries a first time stamp of the first IP data message sent by the source-end routing device ；

The calculation unit is configured to calculate the one-way from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp of the destination-end routing device receiving the first IP data packet Transmission delay

The sending unit is configured to send a second IP data packet to the source-end routing device, where the second IP data packet carries the first time stamp, and the destination-end routing device receives the first IP The second time stamp of the data message and the third time stamp of the second IP data message sent by the destination-end routing device, so that the source-end routing device can use the first time stamp and the second time The third time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data packet are used to calculate a two-way transmission delay.

FIG. 11 is a schematic structural diagram of a source-end routing device provided by an embodiment of this application. As shown in FIG. 11, the source-end routing device includes:

The sending unit is configured to send a first IP data packet to the destination routing device, the first IP data packet carrying the first time stamp of the source routing device sending the first IP data packet, so that The destination routing device calculates the one-way transmission from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message Time delay.

Wherein, the first time stamp is carried in the unused field of the IP packet.

FIG. 12 is a schematic structural diagram of a source-end routing device provided by another embodiment of this application. As shown in FIG. 12, the source-end routing device includes:

A sending unit, configured to send a first IP data packet to a destination-end routing device, where the first IP data packet carries a first timestamp at which the source-end routing device sends the first IP data packet;

The receiving unit is configured to receive a second IP data packet sent by the destination routing device, where the second IP data packet carries the first time stamp, and the destination routing device receives the first IP data The second time stamp of the message and the third time stamp of the second IP data message sent by the destination routing device;

The calculation unit is configured to calculate a bidirectional time stamp based on the first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source routing device receiving the second IP data packet Transmission delay.

FIG. 13 is a schematic structural diagram of a destination routing device according to another embodiment of this application. As shown in FIG. 13, the destination routing device includes:

The second port is used to receive the first IP data packet sent by the source-end routing device and record the second timestamp of the first IP data packet received by the destination-end routing device, the first IP data packet Carrying the first timestamp of the first IP data packet sent by the source-end routing device;

The second processing unit is configured to calculate the one-way transmission delay from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp;

Alternatively, it is used to load the first time stamp, the second time stamp, and the third time stamp for sending the second IP data message into the unused field of the second IP data message, and update the second The header length, total packet length, and header checksum of the IP header of the IP data message are then encapsulated at the MAC layer, and the second IP datagram is sent to the source routing device through the second port So that the source-end routing device receives the second IP data packet according to the first time stamp, the second time stamp, the third time stamp, and the fourth time when the source-end routing device receives the second IP data packet Stamp, calculate the two-way transmission delay.

Wherein, the second processing unit is a dedicated chip or a hardware logic processor.

Wherein, the first timestamp, the second timestamp or the third timestamp is carried in an unused field of the IP packet.

FIG. 14 is a schematic structural diagram of a source-end routing device provided by another embodiment of this application. As shown in FIG. 14, the source-end routing device includes:

Including: a first port and a first processing unit;

The first processing unit is configured to load the first time stamp of the first IP data packet sent by the source-end routing device into the unused field of the first IP data packet, and update the first IP The header length, total packet length, and header checksum of the IP header of the data message are then encapsulated at the MAC layer, and then the first IP data message is sent to the destination routing device through the first port for The destination routing device calculates the one-way from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data packet Transmission delay.

Wherein, the first processing unit is a dedicated chip or a hardware logic processor.

FIG. 15 is a schematic structural diagram of a source-end routing device according to another embodiment of this application. As shown in FIG. 15, the source-end routing device includes:

Including: a first port and a first processing unit;

The first processing unit is configured to load the first time stamp into an unused field of the first IP data message, update the length of the header of the IP header of the first IP data message, The total length of the packet and the header checksum are then encapsulated at the MAC layer, and then the first IP data packet is sent to the destination routing device through the first port;

The first port is also used to receive the second IP data packet sent by the destination routing device, and record the fourth time stamp of the source routing device receiving the second IP data packet; The second IP data packet carries the first time stamp, the second time stamp, and the third time stamp of the destination routing device sending the second IP data packet;

The first processing unit is further configured to de-MAC encapsulate and parse the second IP data message to obtain the first time stamp, the second time stamp, and the third time stamp, according to the first The time stamp, the second time stamp, the third time stamp, and the fourth time stamp are used to calculate a two-way transmission delay.

The embodiment of the present application also provides a destination routing device, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The method for detecting the transmission delay executed by any one of the foregoing destination routing devices is implemented.

An embodiment of the present application also provides a source-side routing device, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the computer program is executed by the processor, The method for detecting transmission delay executed by any one of the foregoing source-end routing devices is implemented.

A person of ordinary skill in the art can understand that all or some of the steps, functional modules/units in the system, and apparatus in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. The components are executed cooperatively. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media. Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage device, or Any other medium used to store desired information and that can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media .

Claims

A method for detecting transmission delay includes:

A destination-end routing device receives a first IP data packet sent by a source-end routing device, where the first IP data packet carries a first time stamp of the first IP data packet sent by the source-end routing device;

Calculating the one-way transmission delay from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp of the destination-end routing device receiving the first IP data message;

Or, send a second IP data packet to the source-end routing device, where the second IP data packet carries the first time stamp, and the first IP data packet received by the destination-end routing device The second time stamp and the third time stamp of the second IP data message sent by the destination routing device, so that the source routing device according to the first time stamp, the second time stamp, and the first time stamp The three timestamps and the fourth timestamp of the source-end routing device receiving the second IP data packet calculate the two-way transmission delay.
The method of claim 1, wherein:

The first timestamp, the second timestamp or the third timestamp is carried in an unused field of the IP packet.
A method for detecting transmission delay includes:

The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries the first time stamp of the first IP data packet sent by the source-end routing device so that the The destination routing device calculates the one-way transmission time from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message Extension.
The method of claim 3, wherein:

The first time stamp is carried in an unused field of the IP packet.
A method for detecting transmission delay includes:

The source-end routing device sends a first IP data packet to the destination-end routing device, where the first IP data packet carries the first timestamp of the first IP data packet sent by the source-end routing device;

Receiving a second IP data packet sent by the destination routing device, where the second IP data packet carries the first time stamp, and the destination routing device receives the second IP data packet of the first IP data packet A timestamp and the third timestamp of the second IP data packet sent by the destination routing device;

Calculate the two-way transmission delay according to the first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source routing device receiving the second IP data packet.
The method of claim 5, wherein:

The first timestamp, the second timestamp or the third timestamp is carried in an unused field of the IP packet.
A destination routing device, which includes: a receiving unit, and further includes: a calculation unit or a sending unit;

The receiving unit is configured to receive a first IP data message sent by a source-end routing device, where the first IP data message carries a first time stamp of the first IP data message sent by the source-end routing device ；

The calculation unit is configured to calculate the one-way from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp of the destination-end routing device receiving the first IP data packet Transmission delay

The sending unit is configured to send a second IP data packet to the source-end routing device, where the second IP data packet carries the first time stamp, and the destination-end routing device receives the first IP The second time stamp of the data message and the third time stamp of the second IP data message sent by the destination-end routing device, so that the source-end routing device can use the first time stamp and the second time The third time stamp, the third time stamp, and the fourth time stamp of the source-end routing device receiving the second IP data packet are used to calculate a two-way transmission delay.
A source routing device, which includes:

The sending unit is configured to send a first IP data packet to the destination routing device, the first IP data packet carrying the first time stamp of the source routing device sending the first IP data packet, so that The destination routing device calculates the one-way transmission from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data message Time delay.
A source-side routing device, including:

A sending unit, configured to send a first IP data packet to a destination-end routing device, where the first IP data packet carries a first timestamp at which the source-end routing device sends the first IP data packet;

The receiving unit is configured to receive a second IP data packet sent by the destination routing device, where the second IP data packet carries the first time stamp, and the destination routing device receives the first IP data The second time stamp of the message and the third time stamp of the second IP data message sent by the destination routing device;

The calculation unit is configured to calculate a bidirectional time stamp based on the first time stamp, the second time stamp, the third time stamp, and the fourth time stamp of the source routing device receiving the second IP data packet Transmission delay.
A destination routing device, including:

The second port is used to receive the first IP data packet sent by the source-end routing device and record the second timestamp of the first IP data packet received by the destination-end routing device, the first IP data packet Carrying the first timestamp of the first IP data packet sent by the source-end routing device;

The second processing unit is configured to calculate the one-way transmission delay from the source-end routing device to the destination-end routing device according to the first time stamp and the second time stamp;

Alternatively, it is used to load the first time stamp, the second time stamp, and the third time stamp for sending the second IP data message into the unused field of the second IP data message, and update the second The header length, total packet length, and header checksum of the IP header of the IP data message are then encapsulated at the MAC layer, and the second IP datagram is sent to the source routing device through the second port So that the source-end routing device receives the second IP data packet according to the first time stamp, the second time stamp, the third time stamp, and the fourth time when the source-end routing device receives the second IP data packet Stamp, calculate the two-way transmission delay.
A source routing device, including: a first port and a first processing unit;

The first processing unit is configured to load the first time stamp of the first IP data packet sent by the source-end routing device into the unused field of the first IP data packet, and update the first IP The header length, total packet length, and header checksum of the IP header of the data message are then encapsulated at the MAC layer, and then the first IP data message is sent to the destination routing device through the first port for The destination routing device calculates the one-way from the source routing device to the destination routing device according to the first time stamp and the second time stamp of the destination routing device receiving the first IP data packet Transmission delay.
A source routing device, including: a first port and a first processing unit;

The first processing unit is configured to load the first time stamp into an unused field of the first IP data message, update the length of the header of the IP header of the first IP data message, The total length of the packet and the header checksum are then encapsulated at the MAC layer, and then the first IP data packet is sent to the destination routing device through the first port;

The first port is also used to receive the second IP data packet sent by the destination routing device, and record the fourth time stamp of the source routing device receiving the second IP data packet; The second IP data packet carries the first time stamp, the second time stamp, and the third time stamp of the destination routing device sending the second IP data packet;

The first processing unit is further configured to de-MAC encapsulate and parse the second IP data message to obtain the first time stamp, the second time stamp, and the third time stamp, according to the first The time stamp, the second time stamp, the third time stamp, and the fourth time stamp are used to calculate a two-way transmission delay.
A destination-side routing device, comprising a memory, a processor, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor implements claims 1 to 2 Any one of the methods for detecting transmission delay.
A source-side routing device, comprising a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and the computer program is executed by the processor to implement the following claims 3 to 6 Any one of the methods for detecting transmission delay.
A computer-readable storage medium, wherein an information processing program is stored on the computer-readable storage medium, and when the information processing program is executed by a processor, the detection transmission time according to any one of claims 1 to 6 is realized. Extension of the method steps.