Method and equipment for measuring and monitoring network performance under optical transport network

Abstract

The invention discloses a method and equipment for measuring and monitoring network performance under an optical transport network (OTN), which can realize visualization of the quality condition of the OTN, so that network management personnel can comprehensively and truly master the transmission quality condition of the OTN. Secondly, the OTN network fault can be timely and accurately found, operation and maintenance personnel are helped to quickly remove the fault, the maintenance efficiency is improved, and the service quality and the user satisfaction degree are further improved; moreover, the TWAMP can measure and evaluate the OTN service quality in a long-term, real-time and high-precision manner, thereby facilitating the long-term quality analysis and detection of the OTN network quality. In addition, the OTN network quality conditions such as time delay, jitter, packet loss, disorder and the like can be objectively and accurately evaluated, so that the actual quality condition when the OTN service passes through the OTN network can be reflected more truly.

Description

Technical Field

[0001] The present invention relates to the field of network communication technology, and in particular to a method and device for measuring and monitoring network performance under an optical transmission network. Background Art

[0002] In modern communication networks, fiber optic technology has become the mainstream, providing high-speed, high-bandwidth data transmission capabilities. Optical Transport Network (OTN) is a transmission network based on fiber optic technology, used to achieve reliable and efficient fiber optic communication. It uses optical transmission technology to transmit data in the form of optical signals, providing high-capacity, low-latency and reliable data transmission. OTN can realize the transmission, multiplexing and monitoring of service signals in the optical domain, and ensure its performance requirements and survivability. It is the main transmission technology used in modern communication networks. OTN can support a variety of upper-layer services or protocols, such as SONET / SDH, ATM, Ethernet, IP, PDH, FibreChannel, GFP, MPLS, OTN virtual concatenation, ODU multiplexing, etc.

[0003] The number of services carried in the network is increasing, and services such as voice, video, and games have higher and higher requirements for network packet loss and latency. The importance of network performance has become increasingly prominent, and network managers need a measurement tool to timely understand the packet loss and latency of the network, so as to adjust and optimize the network according to the test results to meet business needs. In order to more effectively measure and monitor network performance, TWAMP (Two-Way Active Measurement Protocol) came into being. TWAMP (Two-Way Active Measurement Protocol) is used to measure performance parameters such as two-way latency, latency jitter, and packet loss rate of messages between any two devices in the network, providing a basis for network quality analysis. The TWAMP protocol defines two architectures: standard framework and lightweight architecture. TWAMP Light is a lightweight architecture of the TWAMP protocol, which simplifies the control protocol for establishing performance measurement sessions and improves test performance. More and more manufacturers favor and support TWAMP Light technology. Although the Internet Control Message Protocol (ICMP) Echo request / response (also known as the common Ping) seems feasible, there are too many errors and uncertainties to ensure reliability. In contrast, TWAMP can count key performance indicators such as latency, jitter, and packet loss rate. Latency is generated by the timestamp carried by the probe, and the latency can be obtained by the difference in timestamps; jitter is calculated by the absolute value of latency data in adjacent cycles; and packet loss rate is calculated by the number of sent and received packets. With the continuous development of network technology and the increasing richness of application scenarios, the role and value of TWAMP Light will become more and more prominent.

[0004] In today's OTN network, the means to understand the performance of the OTN network are quite limited, and traditional detection methods have their own shortcomings and deficiencies. Normally, the OTN network can be detected through alarms, but only the connectivity of the OTN network can be known; CFM can be used to detect packet loss rate, delay and connectivity, but it is applicable to very few scenarios and only applies to ordinary Layer 2 services; of course, the OTN network performance can also be understood by sending flows through a tester, but the cost of the tester is relatively high. Therefore, if you want to quickly, effectively, accurately and in real time understand the quality of the OTN network, there is no way. Summary of the invention

[0005] The present invention provides a method, device and storage medium for measuring and monitoring network performance under an optical transport network, which can at least solve one of the technical problems in the background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A method for measuring and monitoring network performance under an optical transmission network comprises the following steps: S1. Networking: Equipment access to the OTN network; S2, the control plane issues OTN services; S3. The control plane sends TWAMP Light related configurations, including the size of the sent message, the sending time, the source and destination IP addresses, and the source and destination UDP port numbers. S4. Enable TWAMP Light detection. The forwarding plane is responsible for forwarding the message content, so that the message constructed by TWAMP Light is transmitted in the OTN network. S5. Stop TWAMP Light detection, view the results of enabling TWAMP Light detection, and measure and monitor the connectivity and performance parameters of the OTN network.

[0007] Furthermore, in step S2, OTN can support mapping of multiple client signals, such as SDH, ATM, Ethernet, ODU multiplexed signals, and custom rate data streams, so that OTN can transmit these signal formats, or higher-level client signals using these signals as carriers, such as Ethernet, MPLS, Fibre Channel, HDLC / PPP, PRP, IP, video signals, etc.

[0008] Furthermore, in step S3, the TWAMP Light configuration includes the client (test source) and the server (test destination). Only the client needs to generate and maintain performance measurement data, and the server does not need to generate and maintain performance measurement data, which facilitates the device to quickly obtain measurement data. The sent message size refers to the length of the filling data packet transmitted on the optical transport network, the sending time refers to the duration of sending the message, and the source and destination IP and source and destination UDP port numbers are the forwarding content constructed by simulating the client-side signal.

[0009] Furthermore, in step S4, TWAMP Light defines two roles on the test source device: Client and Sender. The Client is responsible for configuring the TWAMP-light test session, and the Sender is responsible for starting and stopping the TWAMP-light test session. TWAMP Light defines a Responder on the test destination device. The Responder is the destination device of the TWAMP-light test and is responsible for reflecting the session test message back. The TWAMP Light configured on the control plane is associated with the OTN service. The source generates a probe message to be exchanged between two network devices. The forwarding plane forwards the corresponding probe data packet. The OTN side maps the probe data packet to OPUk for transmission. The remote OTN decapsulates and extracts the probe data packet. After receiving the probe message, the Responder constructs a reflection message (Test-response), fills in information such as timestamp and TTL, reflects the message back to the Sender, and then reflects the session test data packet back through the Responder.

[0010] Furthermore, in step S5, the source end calculates the loss rate, round-trip delay and delay jitter of the Test-request message according to the number of Test-request messages received and the time when the Test-request is received, so as to judge the quality of the OTN network from the source end to the destination end and from the destination end to the source end.

[0011] On the other hand, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0012] On the other hand, the present invention further discloses a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0013] Compared with the prior art, the method for measuring and monitoring network performance under the optical transmission network provided by the present invention has many significant advantages: first, the present invention can realize visualization of the quality status of the OTN network, so that network management personnel can fully and truly grasp the transmission quality status of the OTN network; second, the present invention can timely and accurately discover OTN network faults, help operation and maintenance personnel to quickly troubleshoot faults, improve maintenance efficiency, and thus improve service quality and user satisfaction; third, TWAMP can measure and evaluate the quality of OTN services in a long-term, real-time and high-precision manner, which is conducive to long-term quality analysis and detection of OTN network quality; in addition, the present invention can also objectively and accurately evaluate the quality status of OTN networks such as delay, jitter, packet loss, disorder, etc., so as to more truly reflect the actual quality status of the current OTN services when passing through the OTN network. This makes OTN network planning and OTN network construction more reasonable, reduces unnecessary investment, saves maintenance costs, reduces the labor intensity of maintenance personnel, and improves the utilization rate of human resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a network diagram of a device accessing an OTN according to an embodiment of the present invention; Figure 2 This is the OTUk frame structure of an embodiment of the present invention; Figure 3 is a flow chart of TWAMP Light measurement according to an embodiment of the present invention; Figure 4 It is a test flow chart in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0016] The method for measuring and monitoring network performance under an optical transport network described in this embodiment is as follows: Figure 4 , using the following steps: (1) Networking: Equipment access to the OTN network; The primary task of the OTN network is to process WDM wavelength signals, so optical add / drop multiplexing equipment and optical cross-connect equipment are the main node equipment of the optical transport network. OTN network equipment needs to provide the rigid pipeline of traditional OTN to carry various customer services, and provide flexible elastic pipelines to meet the needs of different customer-side service rates and flexible shared bandwidth.

[0017] (2) The control plane delivers OTN services; OTN can support the mapping of multiple customer signals, such as SDH, ATM, Ethernet, ODU multiplexed signals, and custom rate data streams, so that OTN can transmit these signal formats, or higher-level customer signals with these signals as carriers, such as Ethernet, MPLS, Fiber Channel, HDLC / PPP, PRP, IP, video signals, etc. According to customer services with different characteristics, different mapping, encapsulation, multiplexing and scheduling methods are used to deliver OTN services with different rates.

[0018] (3) The control plane sends TWAMP Light related configurations, including the size of the sent message, the sending time, the source and destination IP addresses, and the source and destination UDP port numbers; TWAMP Light configuration includes the client (test source) and the server (test destination). Only the client needs to generate and maintain performance measurement data, and the server does not need to generate and maintain performance measurement data, which makes it easy for the device to quickly obtain measurement data. The size of the message sent refers to the length of the filling data packet transmitted on the optical transmission network, and the sending time refers to the duration of sending the message. The source and destination IP and source and destination UDP port numbers are the forwarding content constructed by simulating the client-side signal.

[0019] (4) Enable TWAMP Light detection. The forwarding plane is responsible for forwarding the message content, so that the message constructed by TWAMP Light is transmitted in the OTN network. TWAMP Light defines two roles on the test source device: Client and Sender. The Client is responsible for configuring the TWAMP-light test session, and the Sender is responsible for starting and stopping the TWAMP-light test session. TWAMP Light defines the Responder on the test destination device. The Responder is the destination device of the TWAMP-light test and is responsible for reflecting the session test message back. The TWAMP Light configured on the control plane is associated with the OTN service. The source generates the probe message to be exchanged between the two network devices. The forwarding plane forwards the corresponding probe data packet. The OTN side maps the probe data packet to OPUk for transmission. The remote OTN decapsulates and extracts the probe data packet. After receiving the probe message, the Responder constructs a reflection message (Test-response), fills in information such as timestamp and TTL, reflects the message back to the Sender, and then reflects the session test data packet back through the Responder.

[0020] (5) Stop TWAMP Light detection, view the results of enabling TWAMP Light detection, and measure and monitor the connectivity and performance parameters of the OTN network.

[0021] The source end calculates the loss rate, round-trip delay, and delay jitter of the Test-request message based on the number of Test-response messages received and the time it takes to receive the Test-response, thereby determining the quality of the OTN network from the source end to the destination end and from the destination end to the source end.

[0022] The following is a detailed description with reference to the accompanying drawings: First, Figure 1 As shown in the figure, the client-side equipment is normally connected to the OTN network. The equipment can support the mapping of multiple client signals, such as SDH, ATM, Ethernet, ODU multiplexed signals, and custom rate data streams, so that the OTN network can transmit these signal formats. The control plane sends down the corresponding OTN services and TWAMP Light related configurations. The source end uses the pre-set IP address, UDP port number and other parameters to construct a test message (Test-request), and performs a test at regular intervals. Each test sends a Test-request message to the Responder. The forwarding plane forwards the test message constructed by TWAMP Light, and the OTN side maps the detection data packet to Figure 2 The OTUk frame structure shown in the figure is transmitted in OPUk. When it reaches the remote OTN side, the detection data packet is extracted through decapsulation. After receiving the detection message, the Responder constructs a reflection message (Test-response), fills in information such as timestamp and TTL, reflects the message back to the Sender, and then reflects the session test data packet back through the Responder. The reflection path is similar. The forwarding plane forwards the reflection message, and the OTN maps the reflection message to OPUk and transmits it to the source end. The specific measurement process is as follows Figure 3 The source end calculates the loss rate, round-trip delay, and delay jitter of the Test-request message based on the number of Test-response messages received and the time it takes to receive the Test-response.

[0023] Taking the GE Ethernet signal, which is widely used in practice, as an example, the source control plane first constructs a common client-side GE detection packet based on the IP address, UDP port number and other parameters of the TWAMP Light. The source forwarding plane forwards the corresponding GE detection packet based on the constructed GE detection packet, and then the GE detection packet enters the OTN mapping and is mapped to OPU0 (L). Adding the OPU0 (L) overhead, it constitutes a complete OPU0 (L). OPU0 (L) plus the ODU0 (L) overhead constitutes ODU0 (L). ODU0 (L) is mapped to any one of the two time slots of OPU1 (H) through ODTU01, and then the OPU1 (H) overhead, ODU (H) overhead, and OTU1 (H) overhead are added to form the OTU1 signal. The OTU1 signal is then transmitted to the remote reflector through the optical layer. The remote reflector performs the opposite action to decode the client-side GE detection packet. After receiving the GE data packet, the Responder constructs a GE reflection data packet, fills in information such as timestamp and TTL, reflects the message back to the Sender, and then reflects the session test data packet back through the Responder. The reflection path is similar. The forwarding plane forwards the reflection message, and the OTN maps the reflection message to the OPUk and transmits it to the source end. The source end calculates the loss rate, round-trip delay, and delay jitter of the Test-request message based on the number of Test-response messages received and the time when the Test-response is received. Use TWAMPLight to view the corresponding packet loss rate, jitter, and delay to determine the quality of the OTN network from the source end to the destination end and from the destination end to the source end. This ends here.

[0024] On the other hand, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0025] On the other hand, the present invention further discloses a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0026] In another embodiment provided in the present application, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to execute any of the methods for measuring and monitoring network performance under an optical transport network in the above embodiments.

[0027] It is understandable that the system, device and storage medium provided in the embodiments of the present invention correspond to the method provided in the embodiments of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts in the above methods.

[0028] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring and monitoring network performance under an optical transport network, characterized in that: The following steps are included: S1. Networking: Equipment access to the OTN network; S2, the control plane issues OTN services; S3. The control plane sends TWAMP Light related configurations, including the size of the sent message, the sending time, the source and destination IP addresses, and the source and destination UDP port numbers. S4. Enable TWAMP Light detection. The forwarding plane is responsible for forwarding the message content, so that the message constructed by TWAMP Light is transmitted in the OTN network. S5. Stop TWAMP Light detection, view the results of enabling TWAMP Light detection, and measure and monitor the connectivity and performance parameters of the OTN network.

2. The method for measuring and monitoring network performance under an optical transport network according to claim 1, characterized in that: In step S2, OTN can support the mapping of multiple client signals, including SDH, ATM, Ethernet, ODU multiplexed signals, and custom rate data streams, so that OTN can transmit these signal formats, or higher-level client signals using these signals as carriers, including Ethernet, MPLS, Fibre Channel, HDLC / PPP, PRP, IP, and video signals.

3. The method for measuring and monitoring network performance under an optical transport network according to claim 1, characterized in that: In step S3, the TWAMP Light configuration includes a client (i.e., the test source) and a server (i.e., the test destination). Only the client needs to generate and maintain performance measurement data, and the server does not need to generate and maintain performance measurement data, which facilitates the device to quickly obtain measurement data.

4. The method for measuring and monitoring network performance under an optical transport network according to claim 3, characterized in that: The message size sent in step S3 refers to the length of the filling data packet transmitted on the optical transport network, the sending time refers to the duration of sending the message, the source and destination IP and source and destination UDP port numbers are the forwarding content constructed by simulating the client-side signal.

5. The method for measuring and monitoring network performance under an optical transport network according to claim 1, characterized in that: In step S4, TWAMP Light defines two roles on the test source device: Client and Sender. The Client is responsible for configuring the TWAMP-light test session, and the Sender is responsible for starting and stopping the TWAMP-light test session. TWAMP Light defines a Responder on the test destination device. The Responder is the destination device of the TWAMP-light test and is responsible for reflecting the session test packets back. The TWAMP Light configured on the control plane is associated with the OTN service. The source side generates the detection packets to be exchanged between the two network devices. The forwarding plane forwards the corresponding detection packets. The OTN side maps the detection packets to OPUk for transmission. The remote OTN decapsulates and extracts the detection data packet. After receiving the detection message, the Responder constructs a reflection message Test-response, fills in the timestamp and TTL information, reflects the message back to the Sender, and then reflects the session test data packet back through the Responder.

6. The method for measuring and monitoring network performance under an optical transport network according to claim 1, characterized in that: Step S5 specifically includes: The source end calculates the loss rate, round-trip delay, and delay jitter of the Test-request message based on the number of Test-request messages received and the time when the Test-request is received, thereby judging the quality of the OTN network from the source end to the destination end and from the destination end to the source end.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the computer program is executed by the processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 6.

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