TWI691182B - System and method for provisioning flexible restoration path in network - Google Patents

Abstract

This invention provides a system and a method for provisioning a flexible restoration path in a network comprising a flexible backup module which reads the performance parameters of a service circuit and flexibly adjusts performance parameters of the service circuit when the network cannot provide the backup path that is the same as the original performance parameter of the service circuit, a route calculation module which calculates a new route based on the performance parameter of the service phone flexibly adjusted by the flexible backup module, and a circuit-providing module which provides a new backup path based on the new route calculated by the route calculation module for the service circuit so as to provide a more complete backup mechanism, so that the network backup path can be flexibly installed to improve system service reliability.

Description

System and method for flexible supply network backup path

The invention relates to a network service circuit supplying technology. More specifically, it relates to a system and method for a flexible backup network backup path.

Packet Transport Network (PTN) and Optical Transport Network (OTN) are currently the main transmission networks for telecom operators. Traditionally, maintenance of circuit services can maintain circuit service quality through protection mechanisms and backup mechanisms. However, the use of protection circuits requires resources and their benefits are not high. At present, most of them are based on backup mechanisms or mixed with backup mechanisms.

When both the working path and the protection path are unavailable, the backup mechanism is activated to calculate the new route. Today's backup mechanism calculates routes based on the original route performance parameters and finds whether there are eligible routes. The route performance parameters include endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, Weight requirements, total circuit length requirements, bit error rate requirements, packet loss rate requirements or risk group requirements, etc. When a route that meets the conditions cannot be found, you must wait for the route to be restored or find the conditions that are met before the new route can continue to provide services. Any service. This situation is particularly serious in OTN networks. Generally, the transmission distance of the backup path is longer than the original route. It is relatively difficult to find the backup path under the same transmission quality requirements. This problem is more pronounced when the ultra-high speed optical network above 200Gbps is transmitted. The maximum transmission distance of the high-speed interface is inversely proportional to its rate. The backup path often cannot meet the original routing performance parameters. Therefore, if the backup route is not found, the service interruption problem occurs. Therefore, the present invention provides a solution to this problem. To improve its shortcomings.

The purpose of the present invention is to provide a flexible backup mechanism for the backup path, which is provided by appropriately adjusting the circuit when the working path of a service circuit in the network fails and the backup path of the same performance cannot be found. As a compromise solution, Jiazhi Circuit maintains the continuous operation of the original service circuit, thereby improving the reliability of the circuit service reliability of the network.

In order to solve the problems disclosed above, the present invention provides a system for a flexible backup network backup path. The system includes: a flexible backup module for reading performance parameters of a service circuit and flexibly adjusting the service circuit Performance parameters, where the flexible backup module reads and flexibly adjusts the performance parameters of the service circuit when the network cannot provide a backup path with the same original performance parameters as the service circuit; the route calculation module , Which is connected to the elastic backup module to calculate a new route based on the performance parameter of the service circuit flexibly adjusted by the elastic backup module; and a circuit supply module, which is connected to the route calculation module to Based on the new route calculated by the route calculation module, a new backup path for installing the service circuit is provided.

The invention also provides a method for a flexible backup network backup path The method includes: confirming that the network cannot provide a backup path with the same original performance parameters as the service circuit; reading the performance parameters of the service circuit through the flexible backup module; and flexibly adjusting the service through the flexible backup module Circuit performance parameters; based on the elastically adjusted performance parameters of the service circuit, calculate a new route through the route calculation module; and based on the new route calculated by the route calculation module, install the service circuit through the circuit supply module New backup path.

In the aforementioned system and method, if the route calculation module cannot calculate the new route, the flexible backup module is readjusted to the performance parameter of the service circuit, so that the route calculation module is based on the readjusted The performance parameters of the service circuit are recalculated for the new route.

In the aforementioned system and method, the flexible backup module actively reads the performance parameters of the service circuit of the network management system or network equipment to collect network transmission performance data.

In the aforementioned system and method, the performance parameters of the service circuit include endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, weight requirements, total circuit length requirements, and bit error rate requirements , Packet loss rate requirements, or risk group requirements.

In the foregoing system and method, the flexible backup module is based on pre-selecting at least one performance parameter of the service circuit that allows or does not allow compromise, and the performance parameters that the network management system or network equipment can provide Option to flexibly adjust the performance parameters of the service circuit.

In the aforementioned system and method, the system is installed in an SDN controller, SDN orchestrator, or network management system.

In the aforementioned system and method, after the circuit supply module provides a new backup path for the service circuit, the flexible backup module is sent a notification message to other adjacent network management systems, SDN controllers, Or SDN orchestrator to update the performance parameters of the service circuit that have been flexibly adjusted.

1‧‧‧System

11‧‧‧Elastic spare module

12‧‧‧Route calculation module

13‧‧‧ circuit supply module

2‧‧‧Internet

S01~S08‧‧‧Step

Please refer to the detailed description of the present invention and its accompanying drawings for further understanding of the technical content of the present invention and its purpose and effect; FIG. 1 is a system implementation architecture diagram of the system for a flexible backup network backup path of the present invention.

FIG. 2 is a flow chart of the method for the redundant backup network backup path of the present invention.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following specific examples are given in conjunction with the accompanying drawings for detailed description as follows: Please refer to FIG. 1 for the elastic supply net of the present invention The system implementation architecture diagram of the road backup path. The system 1 of the present invention is applied to the Internet 2. The system 1 includes a flexible backup module 11, a route calculation module 12 connected to the flexible backup module 11, and The circuit supply module 13 connected to the route calculation module 12, the flexible backup module 11, the route calculation module 12 and the circuit supply module 13 of the system 1 can be realized in the SDN (Internet) 2 Software Defined Network) controller, network management system, or SDN orchestrator to provide flexible backup path for installation.

The flexible backup module 11 reads the service circuit when the Internet 2 can no longer provide a backup path with the same original performance parameters as the original service circuit The original performance parameters, and flexibly adjust the original performance parameters of the service circuit to obtain the elastic performance parameters of the service circuit (the elastically adjusted performance parameters of the service circuit), wherein the performance parameters of the service circuit, whether it is the original performance parameters or the elasticity Performance parameters, including endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, weight requirements, total circuit length requirements, bit error rate requirements, packet loss rate requirements, or Risk group requirements.

The performance parameters of the service circuit can be a combination of one or more requirements. Examples of the flexible adjustment of the performance parameters are as follows: the original performance parameter of the original service circuit is 200 Gbps. When the original performance parameter routing cannot be installed, the flexible backup of the system 1 When the module 11 receives the message that the circuit fails to install, adjust the performance parameters according to the content of the circuit service provided, the real-time status of the network, and the nature of customer service or usage requirements, such as adjusting the bandwidth requirement to 100Gbps, 50Gbps, 40Gbps or 10Gbps circuits , And then calculate the new route through the route calculation module 12; when the performance parameter is a combination of multiple requirements, adjust one or more performance parameter conditions according to the content of the circuit service provided, the real-time status of the network, and the nature of customer service or usage needs. When providing streaming audio and video services, performance parameters such as bandwidth requirements, delay requirements, and number of nodes can be adjusted; if the customer provides financial services, the delay requirements are performance parameters that do not allow compromise. When adjusting the demand factor, the delay requirements are targeted. Other parameters can be adjusted; therefore, the customer can choose one or more performance parameters of the service circuit that allow or do not allow compromise in advance according to their own needs.

The system of the present invention flexibly adjusts the original performance parameters of the service circuit into elastic performance parameters according to the performance parameter options that the network management system or network equipment of the network can provide; for example, the ultra-high speed interface of the network equipment can At the same time, it supports three rates such as 200Gbps, 100Gbps, and 50Gbps, and supports three forward error correction encoding methods. According to the encoding method used, it can provide circuits with bit error rate quality of 10 ^-6 , 10 ^-9 , 10 ^-12, etc. When the bandwidth requirements and bit error rate requirements are compromised, assuming that the original performance parameters are [bandwidth requirement = 200Gbps, bit error rate requirement = 10 ^-12 ], the elastic performance parameter can be set to [bandwidth requirement = 100Gbps, Bit error rate requirement = 10 ^-12 ], [Bandwidth requirement = 100 Gbps, bit error rate requirement = 10 ^-9 ], [Bandwidth requirement = 50 Gbps, bit error rate requirement = 10 ^-6 ], etc.

When the flexible backup module 11 reads the original performance parameters of the service circuit, it can actively collect the original performance parameters of the service circuit from the network management system or network equipment of the Internet 2 to obtain network transmission performance data; The route calculation module 12 calculates a new route based on the elastic performance parameters of the service circuit provided by the elastic backup module 11; after calculation by the route calculation module 12, if the new route cannot be obtained, the elastic backup module 11 is adjusted again The original performance parameter of the service circuit obtains another elastic performance parameter of the service circuit, and again causes the route calculation module 12 to calculate another new route; the circuit supply module 13 serves the new route calculated by the route calculation module 12 The backup path of the circuit is provided.

After the circuit supply module 13 completes the backup path for installing the service circuit according to the new route calculated by the route calculation module 12, the flexible backup module 11 sends a notification message to other SDN controllers adjacent to the Internet 2 , Network management system, or SDN orchestrator, to inform the elastic performance parameters of the service circuit, for other SDN controllers, network management systems, Or SDN orchestrator update information to further enable contingency measures accordingly, such as sending alarm notifications to customers who will be affected by changes in the network service circuit, or cooperating with the elastic performance parameters of the service circuit to perform relevant response mechanisms, such as adjusting the bandwidth , Perform flow load balancing, etc.

Please refer to FIG. 2, which is a flowchart of the steps of the method of the flexible backup network backup path of the present invention. The method of the present invention is applied to the flexible backup module 11, the routing calculation module 12, and the circuit The Internet 2 of the module 13 is installed under the condition that the Internet 2 can no longer provide the same backup path as the original performance parameters of the original service circuit. The method of the present invention is applied. The method includes the following steps: Step S01 : When it is confirmed that Internet 2 cannot provide a backup path that is the same as the original performance parameter of the service circuit, enter the start procedure; Step S02: the flexible backup module 11 reads the original performance parameter of the service circuit, where, read The original performance parameter method of the service circuit can actively collect the original performance parameter of the service circuit from the network management system or network equipment of the Internet 2 to obtain network transmission performance data; Step S03: Flexible adjustment of the service circuit Original performance parameters to obtain the elastic performance parameters of the service circuit, where the adjustable performance parameters of the service circuit include endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, weight requirements, circuits Total length requirements, bit error rate requirements, packet loss rate requirements, or risk group requirements, etc.; Step S04: after adjusting the parameters, determine whether the performance parameters are adjusted and changed, if there are no changes, then end to step S07; if the performance parameters are adjusted and changed then Step S05 is executed, and the route calculation module 12 calculates a new route based on the elastic performance parameters of the service circuit. The calculation result will be judged by the step S06 whether there is a route that meets the conditions. Step S03 is executed, and the elastic backup module 11 adjusts the original performance parameter of the service circuit again to obtain another elastic performance parameter of the service circuit, and then the route calculation module 12 calculates another new route; if there is a new route, it proceeds to step S07, the circuit supply module 13 performs the backup path of the service circuit according to the new route for installation, and after installation, proceeds to step S08: send a notification message to other SDN controllers, network management systems, Or SDN orchestrator, to inform the elastic performance parameters of the service circuit for other SDN controllers, network management systems, or SDN orchestrators adjacent to Internet 2 to update information to further enable contingency measures, such as sending alarms Notify customers who will be affected by changes in the network service circuit, or cooperate with the elastic performance parameters of the service circuit to perform relevant response mechanisms, such as frequency bandwidth reduction, traffic load balancing, etc.

The system and method for providing a flexible backup network backup path provided by the present invention, when compared with other conventional technologies, have the following advantages: provide a more flexible backup mechanism and maintain as much as possible under acceptable quality conditions The service is not interrupted to achieve the effect of improving service reliability.

To provide more diversified backup solutions, users of the network can select performance parameters that allow compromise based on the service circuit performance that they value, and the Internet can then use it to calculate and install backup routes.

The above detailed description is a specific description of a feasible embodiment of the present invention, but this embodiment is not intended to limit the patent scope of the present invention. Equivalent implementations or changes without departing from the technical spirit of the present invention should be included in the patent scope of this case.

To sum up, this case is not only innovative in terms of technical ideas, but also possesses the above-mentioned multiple functions that traditional methods do not match, which has fully met the requirements of novelty and progressive legal invention patents. Approve this application for a patent for invention to encourage invention and achieve good results.

1‧‧‧System

11‧‧‧Elastic spare module

12‧‧‧Route calculation module

13‧‧‧ circuit supply module

2‧‧‧Internet

Claims (12)

A system for a flexible backup network backup path, the system includes: a flexible backup module for reading performance parameters of a service circuit and flexibly adjusting performance parameters of the service circuit, wherein the flexible backup module The group is to read the performance parameters of the service circuit when the Internet cannot provide a backup path that is the same as the original performance parameter of the service circuit, and the flexible backup module allows the compromise or At least one performance parameter that does not allow compromise and the performance parameter options provided by the network management system or network equipment to flexibly adjust the performance parameters of the service circuit; the routing calculation module, which is connected to the elastic backup module, to Calculating a new route based on the performance parameter of the service circuit flexibly adjusted by the elastic backup module; and a circuit supply module connected to the route calculation module to supply the new route based on the new route calculated by the route calculation module Install the new backup path for the service circuit. The system as described in item 1 of the patent application scope, wherein if the route calculation module cannot calculate the new route, the flexible backup module is caused to readjust the performance parameters of the service circuit to enable the route calculation The module recalculates the new route based on the readjusted performance parameters of the service circuit. The system as described in item 1 of the patent application scope, wherein the flexible backup module actively reads the performance parameters of the service circuit of the network management system or network equipment to collect network transmission performance data. The system as described in item 1 of the patent application scope, wherein the performance parameters of the service circuit include endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, weight requirements, and total circuit length Requirements, bit error rate requirements, packet loss rate requirements, or risk group requirements. The system as described in item 1 of the patent application scope, wherein the system is installed in an SDN controller, SDN orchestrator, or network management system. The system as described in item 1 of the patent application scope, in which, after the circuit supply module installs the new backup path of the service circuit, the flexible backup module is sent a notification message to other adjacent network management The system, SDN controller, or SDN orchestrator to update the performance parameters of the service circuit that are flexibly adjusted. A method for a flexible backup network backup path. The method includes: confirming that the Internet cannot provide a backup path with the same original performance parameters as the service circuit; reading the service circuit through the flexible backup module Performance parameters; through the flexible backup module, according to the pre-selected at least one performance parameter of the service circuit that allows or does not allow compromise and the performance parameter options provided by the network management system or network equipment to flexibly adjust the service circuit Performance parameters; based on the elastically adjusted performance parameters of the service circuit, calculate a new route through the route calculation module; and based on the new route calculated by the route calculation module, supply the new service circuit through the circuit supply module Backup path. The method as described in item 7 of the patent application scope, wherein the calculation of the new route through the route calculation module further includes: if the route calculation module cannot calculate the new route, the flexible backup module readjusts the The performance parameter of the service circuit, so that the route calculation module recalculates a new route based on the readjusted performance parameter of the service circuit. The method according to item 7 of the patent application scope, wherein the performance parameter reading of the service circuit through the flexible backup module includes actively reading the network management system or network device through the flexible backup module The performance parameters of the service circuit are used to collect network transmission performance data. The method as described in item 7 of the patent application scope, wherein the performance parameters of the service circuit include endpoint requirements, bandwidth requirements, delay requirements, delay jitter requirements, span number requirements, node number requirements, weight requirements, and total circuit length Requirements, bit error rate requirements, packet loss rate requirements, or risk group requirements. The method as described in item 7 of the patent application scope, wherein the flexible backup module, the routing calculation module, the system, and the circuit supply module are installed on an SDN controller, SDN orchestrator, or network Road management system. The system as described in item 7 of the patent application scope, wherein the new backup path for installing the service circuit through the circuit supply module further includes: a new backup path for installing the service circuit in the circuit supply module After that, the flexible backup module is sent a notification message to other adjacent network management systems, SDN controllers, or SDN orchestrators to update the performance parameters of the service circuit that have been flexibly adjusted.

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