CN113365165B - Method and equipment for dynamically switching transport network rerouting service - Google Patents
Method and equipment for dynamically switching transport network rerouting service Download PDFInfo
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- CN113365165B CN113365165B CN202110692461.XA CN202110692461A CN113365165B CN 113365165 B CN113365165 B CN 113365165B CN 202110692461 A CN202110692461 A CN 202110692461A CN 113365165 B CN113365165 B CN 113365165B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0037—Operation
- H04Q2011/0043—Fault tolerance
Abstract
The invention discloses a method and a device for dynamically switching a transport network rerouting service, wherein the method comprises the following steps: the network management analyzes the received equipment alarm command, judges an alarm point network element and analyzes a path searching starting point and a path searching ending point of the service fault; the network management initiates a rerouting command, and performs routing calculation between the routing starting point and the routing ending point to obtain a normal path; for the normal path obtained by calculation, deleting the original fault path configuration on the equipment, and activating and downloading the configuration of the normal path to the equipment; and after the configuration downloading is successful, replacing the fault path to recover the service communication, and completing the service switching after the rerouting replacing connection is successful. The normal path segment and the normal network element of the original path are multiplexed in the path searching process, and when the path searching is carried out at the path searching starting point and the path searching ending point, the number of the network elements needing to be searched for the path searching can be reduced, thereby being beneficial to improving the path searching efficiency.
Description
Technical Field
The invention belongs to the field of service rerouting in telecommunication network management, and particularly relates to a method and equipment for dynamically switching rerouting services of a transmission network.
Background
In an optical network, especially an Intelligent Optical Network (ION), as the operation time of the network increases, the number of times of establishing and deleting connections in the network increases, and the use of resources is likely to be unreasonable, which affects the operation performance of the network. In addition, during the operation of the network, network maintenance work may be performed to adjust the resources of the network, for example: when a node or a link is added, some connections may be affected during the resource adjustment process, and for this reason, the affected connections need to be adjusted in route to avoid the area maintained by the network. The operation in the above case is an operation within the network, and the influence on the connection is required to be within the range permitted by the client.
Rerouting is a technique for establishing another alternative connection for a currently existing connection. The rerouting is classified into soft rerouting and hard rerouting. The hard rerouting is to release the current connection before establishing an alternative connection for the current connection, and then to establish the alternative connection, that is: the construction is carried out after disassembly. Otherwise, the soft rerouting establishes an alternative connection first, and releases the current connection after switching the service to the alternative connection.
Compared with hard rerouting, soft rerouting has the characteristics of short service interruption time and reliability, and is therefore mostly used for network optimization and network maintenance in practical applications.
The existing rerouting methods mainly include the following methods:
1. the establishment and deployment of the service connection are completed manually, and after the assignment in the network completes the alternative connection, a service switching command is issued from the network management to switch the service from the current connection to the alternative connection. This approach requires a large number of manual intervention actions, which is very inefficient today when the network topology is increasingly complex and the network size is increasing.
2. After determining the nodes and links through which the rerouting takes place, an alternative connection is established and then the traffic is switched using the idle overhead or a specific sequence in the traffic signal. Such methods have specific requirements on the topology of the network or the traffic signals.
In a data network, a conventional soft rerouting method also establishes an alternative connection first, and then removes a current connection, and there is no explicit service switching action in the two processes, which is feasible in the data network because the data network is a packet-switched network, and after the alternative connection is successfully established, a data packet can be forwarded on a data plane according to a forwarding table, but in an optical network, time-division switching, wavelength-division switching, or space-division switching is currently adopted to switch a service to the alternative connection, which requires a hardware action of a device, and therefore, in order to ensure the reliability of the switching, explicit signaling is required to coordinate the switching process.
With the gradual intelligence of optical network management and control, the rerouting technology has further development, but is limited to the aspect of hard rerouting, and soft rerouting has no corresponding development. At present, although the signaling standard protocol related to the intelligent optical network defines the signaling procedures and messages related to connection establishment and deletion, these procedures and messages cannot completely meet the requirement of performing soft rerouting on a section of a connection.
At present, for a method for implementing fast rerouting, in some technologies, service switching is triggered by fault information, but service damage is caused under the condition of switching failure, and the method is not suitable for an application scenario of network maintenance. Some technologies use idle overhead in service flow signals to implement, for example, in a control plane, rerouting related control plane signaling or configuration of a management plane is responsible for routing a new path and establishing a transmission channel connection for the new path, and only a source end is switched and configured in a signaling/configuration process, but not a mapping relationship in a circuit layer processing module of a sink segment; on the level of data framing, the general framing procedure for realizing encapsulation framing and adaptation is expanded and supplemented, and an MRI domain, namely a mapping relation indication domain is redefined by using the idle overhead which is not defined in ITU-T7041, is used for transmitting the mapping indication information required during rerouting, and the configuration operation of mapping relation switching is realized through GFP frame overhead bytes. One of the disadvantages of this approach is that it requires the traffic data to be encapsulated using a specific encapsulation method, i.e., a generic framing procedure.
In the existing telecommunication network management, the end-to-end service may cause interruption of the running service due to the failure of the line/single disk, and at this time, the device at the failure point will send an alarm notification, and after receiving the alarm, the network management needs to select a new path to replace the failed service path, thereby ensuring the normal communication of the line.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a method and equipment for dynamically switching the transport network rerouting service, thereby solving the technical problem that an optimal replacement path is selected by a path selection scheme of the network management rerouting new service.
To achieve the above object, according to an aspect of the present invention, there is provided a method for dynamically switching a rerouting service of a transport network, the method comprising:
the network management analyzes the received equipment alarm command, judges an alarm point network element and analyzes a path searching starting point and a path searching ending point of the service fault;
the network management initiates a rerouting command, and performs routing calculation between the routing starting point and the routing ending point to obtain a normal path;
for the normal path obtained by calculation, deleting the original fault path configuration on the equipment, and activating and downloading the configuration of the normal path to the equipment;
and after the configuration downloading is successful, the fault path is replaced to restore the service communication, the rerouting replacement connection is successful, and the service switching is completed.
Preferably, the network management system analyzes the received device alarm command, determines to obtain an alarm point network element, and analyzes to obtain a route searching start point and a route searching end point of the service fault, and the specific method includes:
the alarm point network element is divided into a starting alarm point network element 1 and an ending alarm point network element 2, wherein:
the network element which is close to the source network element and fails in receiving the direction signal is the initial alarm point network element 1, and the network element which is close to the host network element and fails in receiving the direction signal is the ending alarm point network element 2;
the path searching starting point is a source port of a first network element 3 which sends a transmission signal to a starting alarm point network element 1;
the route searching end point is a host port of the network element 2 at the end warning point;
and the normal path segment combination of the original path between the initial alarm point network element 1 and the second network element 4 sending signals to the end alarm point network element 2 is stored in a cache.
Preferably, the network manager initiates a rerouting command to perform a route searching calculation on the route searching start point and the route searching end point to obtain a normal path, and the specific method includes:
if at least two normal connecting fibers exist between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, and when one of the normal connecting fibers in the original path fails, the rerouting switching uses other normal connecting fibers;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the initial alarm point network element 1, the end alarm point network element 2, the first network element 3 and the second network element 4, and changing the service configuration of the multiplexing network element;
the first network element 3 transmits a signal to the initial alarm point network element 1, and the second network element 4 transmits a signal to the end alarm point network element 2;
the reroute forms a first new path W1.
Preferably, the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method includes:
if a normal fiber connection exists between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the first network element 3 and the alarm ending point network element 2;
finding a first new network element 51 between the first network element 3 and the path of the end alarm point network element 2 in the routing process, wherein the first network element 3 transmits a signal to the end alarm point network element 2 through the first new network element 51;
the reroute forms a second new path W2.
Preferably, the network manager initiates a rerouting command to perform a route searching calculation on the route searching start point and the route searching end point to obtain a normal path, and the specific method includes:
if a normal fiber connection exists between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing a normal path segment of an original path, and simultaneously multiplexing the initial alarm point network element 1, the end alarm point network element 2, the first network element 3 and the second network element 4;
finding a second new network element 52 between the first network element 3 and the initial alarm point network element 1 path in the routing process, wherein the first network element 3 transmits a signal to the initial alarm point network element 1 through the second new network element 52;
finding a third new network element 53 between the second network element 4 and the path of the alarm ending point network element 2 in the routing process, wherein the second network element 4 transmits a signal to the alarm ending point network element 2 through the third new network element 53;
the reroute forms a third new path W3.
Preferably, the network manager initiates a rerouting command to perform a route searching calculation on the route searching start point and the route searching end point to obtain a normal path, and the specific method includes:
performing alternate rollback network element routing calculation on the routing starting point and the routing end point;
multiplexing the first network element 3 or the end alarm point network element 2;
the first network element 3 backs to the source network element direction, one network element backs each time, a normal path between the first fallback network element 31 and the first network element 3 is stored in a cache, the alarm ending point network element 2 backs to the sink network element direction, one network element backs each time, and a normal path between the second fallback network element 21 and the alarm ending point network element 2 is stored in a cache;
searching for a fourth new network element 54 between the first network element 3 and the second fallback network element 21 path or between the end alarm point network element 2 and the first fallback network element 31, where the first fallback network element 31 transmits a signal to the second fallback network element 21 through the fourth new network element 54;
the reroute forms a fourth new path W4.
Preferably, the network manager initiates a rerouting command to perform a route searching calculation on the route searching start point and the route searching end point to obtain a normal path, and the specific method includes:
after the path-finding starting point and the path-finding end point respectively perform a round of alternate fallback network element path finding, if the path-finding between the first fallback network element 31 and the end alarm point network element 2 and between the first network element 3 and the second fallback network element 21 fails;
finding a fifth new network element 55 between the paths of the first fallback network element 31 and the second fallback network element 21;
the first fallback network element 31 transmits a signal to the second fallback network element 21 through the fifth new network element 55;
the reroute forms a fifth new path W5.
Preferably, the network manager initiates a rerouting command to perform a route searching calculation on the route searching start point and the route searching end point to obtain a normal path, and the specific method includes:
if one direction is returned to the source network element or the sink network element, stopping alternate returning, and continuing returning and routing to the direction which is not returned to the source network element or the sink network element;
if the continuous rollback routing fails, the routing start point backs to the source network element, the routing end point backs to the sink network element, and a sixth new network element 56 between the paths of the source network element and the sink network element is searched;
the source network element transmits a signal to the sink network element through the sixth new network element 56;
the reroute forms a sixth new path W6.
Preferably, for the calculated normal path, deleting an original configuration of the failed path on the device, and activating and downloading the configuration of the normal path to the device, the specific method includes:
for a network element in the multiplexed original path, wherein:
the destination port basic configuration of the initial alarm point network element 1 is unchanged, the original service configuration is deleted, and the source port basic configuration and the service configuration of the initial alarm point network element 1 are downloaded again;
the destination port basic configuration of the alarm ending point network element 2 is unchanged, the original service configuration is deleted, and the source port basic configuration and the service configuration of the alarm ending point network element 2 are downloaded again;
the basic configuration of the source port of the first network element 3 is unchanged, the original service configuration is deleted, and the basic configuration of the sink port and the service configuration of the first network element 3 are downloaded again;
the source port basic configuration of the second network element 4 is unchanged, the original service configuration is deleted, and the sink port basic configuration and the service configuration of the second network element 4 are downloaded again;
for a new network element 5 in a rerouted new path, the sink port and source port traffic configuration and the base configuration of the new network element 5 are activated and downloaded to the device.
According to another aspect of the present invention, there is provided an apparatus for dynamically switching transport network rerouting traffic, the apparatus comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being configured by the processor to perform the method of dynamic switching of transport network rerouting traffic according to the first aspect.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the normal path segment and the normal network element of the original path are multiplexed in the path searching process, and when the path searching is carried out at the path searching starting point and the path searching ending point, the number of the network elements needing to be searched for path searching can be reduced, thereby being beneficial to improving the path searching efficiency;
normal path segments in the original path are reused in the path finding process, the path finding time is reduced, and the path finding efficiency is accelerated;
the normal network elements of the original path are multiplexed in the routing process, so that the number of the network elements needing interaction for downloading configuration can be reduced;
the normal net element port of the original path is reused in the route searching process, so that the number of configuration items needing to be downloaded can be reduced.
Drawings
Fig. 1 is a schematic flowchart of a dynamic switching method for rerouting services in a transport network according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of the rerouting first new path W1 in the first embodiment;
fig. 3 is a schematic diagram of the rerouting second new path W2 in the first embodiment;
fig. 4 is a schematic diagram of the rerouted third new path W3 in the first embodiment;
fig. 5 is a schematic diagram of a fourth new path W4 for rerouting in the first embodiment;
fig. 6 is a schematic diagram of a fourth new path W4 for rerouting in the first embodiment;
fig. 7 is a schematic diagram of a fourth new path W4 for rerouting when there are 1 alarm signals in the first embodiment;
fig. 8 is a schematic diagram of a fifth new rerouting path W5 in the first embodiment;
fig. 9 is a schematic diagram of a sixth new rerouting path W6 in the first embodiment;
fig. 10 is a schematic diagram of a path finding of an intermediate network element, which is a path finding start network element or a path finding end network element in the first embodiment;
fig. 11 is a schematic diagram of a routing using a routing start network element as a source network element in the first embodiment;
fig. 12 is a schematic device diagram of a dynamic switching method for rerouting traffic based on a transport network in the second embodiment.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-initial alarm point network element; 2-ending the alarm point network element; 21-a second fallback network element; 3-a first network element; 31-a first fallback network element; 4-a second network element; 5-a new network element; 51-a first new network element; 52-a second new network element; 53-a third new network element; 54-a fourth new network element; 55-a fifth new network element; 56-sixth new network element.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The first embodiment is as follows:
this embodiment provides a method for dynamically switching a rerouting service in a transport network, as shown in fig. 1: the method comprises the following steps:
s101: the network management analyzes the received equipment alarm command, judges the alarm point network element and analyzes the path searching starting point and the path searching ending point of the service fault.
In the existing telecommunication network management, an end-to-end service may cause service interruption in operation due to faults such as fiber connection/single disk, and at this time, a fault point device may send an alarm notification, and after receiving the alarm information, the network management can analyze that specific fault information is caused by fiber connection or single disk, and the network management needs to reselect a new path between a route searching start point and a route searching end point to replace a fault service path, thereby ensuring normal communication of the line.
S102: and the network manager initiates a rerouting command, and performs routing calculation between the routing starting point and the routing ending point to obtain a normal path.
In the first embodiment, multiple routing paths are included, a normal path segment in the multiplexed original path is preferred, then a normal network element in the multiplexed original path is selected, and a way of sequentially backing up network elements is adopted to route backwards, so that the routing efficiency is improved, and the network element configuration process is reduced.
S103: and deleting the original fault path configuration on the equipment for the calculated normal path, and activating and downloading the configuration of the normal path to the equipment.
In this embodiment, if there is a normal network element multiplexing a failure area in an original path, the source or sink port basic configuration and the original service configuration are deleted.
S104: and after the configuration downloading is successful, the fault path is replaced to restore the service communication, the rerouting replacement connection is successful, and the service switching is completed.
The method in the first embodiment can multiplex the normal path segment of the original path and use the intermediate network element as the path-finding starting point and the path-finding ending point to perform path finding, can reduce the number of network elements to be found for path finding, and is beneficial to improving the path-finding efficiency;
the normal path segment in the original path is directly used, so that the path searching time is reduced, and the path searching efficiency is accelerated;
the network elements of the original path are multiplexed, so that the number of the network elements needing interaction for downloading can be reduced;
and the network element port of the original path is multiplexed, so that the number of configuration items needing to be downloaded can be reduced.
In order to multiplex the normal path segment in the original path in the routing process, the original normal path segment needs to be stored in a cache first, and after receiving an alarm signal, a network manager analyzes a fault point to obtain a routing start point and a routing end point of a service fault, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, as shown in fig. 2, the network manager analyzes a received device alarm command, judges to obtain a network element of an alarm point, and analyzes to obtain the routing start point and the routing end point of the service fault, and the specific method includes:
the alarm point network element is divided into a starting alarm point network element 1 and an ending alarm point network element 2, wherein:
the network element which is close to the source network element and fails in receiving the direction signal is the initial alarm point network element 1, and the network element which is close to the host network element and fails in receiving the direction signal is the ending alarm point network element 2;
the path searching starting point is a source port of a first network element 3 which sends a transmission signal to a starting alarm point network element 1;
the route searching end point is a host port of the network element 2 at the end warning point;
and the normal path segment combination of the original path between the initial alarm point network element 1 and the second network element 4 sending signals to the end alarm point network element 2 is stored in a cache.
In the first embodiment, when analyzing the failure point, the network manager may analyze a path searching start point and a path searching end point of the service failure and a type of the service failure, and perform path searching calculation on the path searching start point and the path searching end point.
If the network manager analyzes that the received equipment alarm command is one, the first network element 3 fails to send a transmission signal to the alarm point network element, the alarm point network element fails to send a transmission signal to the second network element 4, the initial alarm point network element 1 and the end alarm point network element 2 are the same network element, the path-finding starting point is the source port of the first network element 3, the path-finding end point is the sink port of the alarm point network element to the second network element 4, and a normal path segment does not exist between the source port of the first network element 3 and the sink port of the second network element 4 in the original path, so that path-finding calculation is directly performed.
If the original path has a fault, and if the original path has a replaceable fiber connection path, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method includes:
if one of the at least two normal fiber connection original paths between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path has a fault, rerouting and switching to use other normal fiber connection paths;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the initial alarm point network element 1, the end alarm point network element 2, the first network element 3 and the second network element 4, and changing the service configuration of the multiplexing network element;
the first network element 3 transmits a signal to the initial alarm point network element 1, and the second network element 4 transmits a signal to the end alarm point network element 2;
the reroute forms a first new path W1.
In the first embodiment, as shown in fig. 2, replaceable fiber connection paths exist between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, after the original fiber connection fails, the network manager performs rerouting and routing, when routing, other normal fiber connection paths can be used to create a replacement service, the network manager can directly switch to other normal fiber connection paths to reduce routing time, and simultaneously multiplex the normal path segment of the original path and each network element in the original path, thereby avoiding the time for searching the network element. The path W1 is indicated by a bold solid line in fig. 2.
If the original path has a failure and an irreplaceable fiber connection path exists in the original path, in order to save the path finding time, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, as shown in fig. 3, the network manager initiates a rerouting command, performs path finding calculation on the path finding start point and the path finding end point, and obtains a normal path, and the specific method includes:
if a normal fiber connection path exists between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the first network element 3 and the alarm ending point network element 2;
finding a first new network element 51 between the first network element 3 and the path of the end alarm point network element 2 in the routing process, wherein the first network element 3 transmits a signal to the end alarm point network element 2 through the first new network element 51;
the reroute forms a second new path W2.
In this embodiment, as shown in fig. 3, an irreplaceable fiber connection path does not exist between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, after a fiber connection failure occurs, the network manager searches for the first new network element 51 between the first network element 3 and the end alarm point network element 2 path in the path finding process, the number of the first new network elements 51 is greater than or equal to 1, and the second new path W2 is formed by rerouting, where the normal path segment of the original path and each network element in the original path are multiplexed. The path W2 is indicated by a bold solid line in fig. 3.
The rerouting of the second new path W2 takes longer than the rerouting of the first new path W1 due to the need to find the first new network element 51.
In order to save the routing time, if there is no replaceable fiber connection path in the original path, a preferred implementation scheme is also provided in combination with the embodiment of the present invention, specifically, as shown in fig. 4, the network manager initiates a rerouting command to perform routing calculation on the routing start point and the routing end point to obtain a normal path, where the specific method includes:
if a normal fiber connection path exists between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing a normal path segment of an original path, and simultaneously multiplexing the initial alarm point network element 1, the end alarm point network element 2, the first network element 3 and the second network element 4;
finding a second new network element 52 between the first network element 3 and the initial alarm point network element 1 path in the routing process, wherein the first network element 3 transmits a signal to the initial alarm point network element 1 through the second new network element 52;
finding a third new network element 53 between the second network element 4 and the path of the alarm ending point network element 2 in the routing process, wherein the second network element 4 transmits a signal to the alarm ending point network element 2 through the third new network element 53;
the reroute forms a third new path W3.
In this embodiment, as shown in fig. 4, in the original path, there is no replaceable fiber connection path between the first network element 3 and the initial alarm point network element 1, and between the second network element 4 and the end alarm point network element 2, after the fiber connection fails, the network manager searches for the second new network element 52 between the first network element 3 and the initial alarm point network element 1 path, the third new network element 53 between the second network element 4 and the end alarm point network element 2 path, and the number of the second new network element 52 and the number of the third new network element 53 are respectively greater than or equal to 1, and reroutes to form the normal path segment multiplexing the original path and each network element in the original path in the third new path W3. The path W3 is indicated by a bold solid line in fig. 4.
The time to reroute the third new path W3 may be longer than the time to reroute the second new path W2 due to the need to find the second new network element 52 and the third new network element 53.
In order to save the routing time, if there is no replaceable fiber connection path in the original path, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, as shown in fig. 5 and 6, the network manager initiates a rerouting command, and performs routing calculation on the routing start point and the routing end point to obtain a normal path, where the specific method includes:
performing alternate rollback network element routing calculation on the routing starting point and the routing end point;
multiplexing the first network element 3 or the end alarm point network element 2;
the first network element 3 backs to the source network element direction, one network element backs each time, a normal path between the first fallback network element 31 and the first network element 3 is stored in a cache, the alarm ending point network element 2 backs to the sink network element direction, one network element backs each time, and a normal path between the second fallback network element 21 and the alarm ending point network element 2 is stored in a cache;
searching for a fourth new network element 54 between the first network element 3 and the second fallback network element 21 path or between the end alarm point network element 2 and the first fallback network element 31, where the first fallback network element 31 transmits a signal to the second fallback network element 21 through the fourth new network element 54;
the reroute forms a fourth new path W4.
In this embodiment, as shown in fig. 5, there is no replaceable fiber connection path between the first network element 3 and the initial alarm point network element 1 and between the second network element 4 and the end alarm point network element 2 in the original path, and after a failure occurs, as shown in fig. 5, first, after the first network element 3 backs off a network element toward the source network element, the starting point of routing becomes the first fallback network element 31, the end point of routing is the end alarm point network element 2, the normal path between the first fallback network element 31 and the first network element 3 is stored in the cache, and simultaneously whether there is an available path between the first fallback network element 31 and the end alarm point network element 2 is searched, if there is no available path, the end alarm point network element 2 backs off a network element toward the sink network element, the end point of routing is the second fallback network element 21, the normal path between the end alarm point network element 2 and the second fallback network element 21 is stored in the cache, and the first fallback network element 31 and the second network element 21 are routed, firstly, the cache path segment between the first fallback network element 31 and the first network element 3 is prioritized, and simultaneously, an available path between the first network element 3 and the second fallback network element 21 is searched, if a fourth new network element 54 exists, the number of the fourth new network elements 54 is respectively greater than or equal to 1, the normal path between the first fallback network element 31 and the first network element 3 in the original path are multiplexed in the fourth new path W4 formed by rerouting, the routing calculation between the first fallback network element 31 → the first network element 3 → the fourth new network element 54 → the second fallback network element 21 is completed, and the fourth new path W4 formed by rerouting is obtained to avoid the fault. The path W4 is indicated by a bold solid line in fig. 5.
As shown in fig. 6, if the preferential path finding according to fig. 5 fails, the path finding is performed on the first fallback network element 31 and the second fallback network element 21, then the normal path segments of the end alarm point network element 2 and the second fallback network element 21 are preferred, and the path between the first fallback network element 31 and the end alarm point network element 2 is simultaneously found, if the fourth new network element 54 exists, the number of the fourth new network element 54 is respectively greater than or equal to 1, the normal path between the end alarm point network element 2 and the second fallback network element 21 and the end alarm point network element 2 are multiplexed in the fourth new path W4 formed by rerouting, so that the path finding calculation between the first fallback network element 31 → the fourth new network element 54 → the end alarm point network element 2 → the second fallback network element 21 is completed, and the fourth new path W4 formed by rerouting is obtained to avoid the fault. The path W4 is indicated by a bold solid line in fig. 6.
Fig. 5 and fig. 6 only represent possible paths for routing between the first fallback network element 31 and the second fallback network element 21, in the first embodiment, the path in fig. 5 is preferentially selected, and the path in fig. 6 can also be implemented by changing the direction of the preferential fallback.
If there is only one alarm signal, as shown in fig. 7, the first network element 3 returns one network element to the source network element direction, or the alarm point ending network element 2 returns one network element to the sink network element direction, after returning, the route searching start point and the route searching ending point change, and the reroute forming fourth new path W4 also changes according to the specific situation.
In order to save the routing time, if there is a failure in the original path and if there is an irreplaceable fiber connection path in the original path, in combination with the embodiment of the present invention, specifically, as shown in fig. 8, the network manager initiates a rerouting command to perform routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method includes:
after the path-finding starting point and the path-finding ending point respectively perform a round of alternate fallback network element path finding, if there is a fault in the path between the first fallback network element 31 and the first network element 3, and between the second fallback network element 21 and the end alarm point network element 2;
finding a fifth new network element 55 between the paths of the first fallback network element 31 and the second fallback network element 21;
the first fallback network element 31 transmits a signal to the second fallback network element 21 through the fifth new network element 55;
the reroute forms a fifth new path W5.
In the first embodiment, as shown in fig. 8, if there is a failure in the paths between the first fallback network element 31 and the first network element 3, and the second fallback network element 21 and the end alarm point network element 2, and it is preferable that the path segments stored in the cache cannot be successfully found, the fifth new network element 55 between the paths of the first fallback network element 31 and the second fallback network element 21 is searched, so as to complete the routing calculation between the first fallback network element 31 → the fifth new network element 55 → the second fallback network element 21, and obtain a reroute to form the fifth new path W5 to avoid the failure.
Since the rerouting to form the fifth new path W5 does not have the normal path segment in the multiplexed original path and the normal network element in the multiplexed original path, the fifth new network element 55 needs to be found, and the time for rerouting to form the fifth new path W5 is longer than the time for rerouting to form the fourth new path W4. The path W5 is indicated by a bold solid line in fig. 7.
If all the above methods fail to find a path, in order to save the path finding time, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, as shown in fig. 9, the network manager initiates a rerouting command to perform path finding calculation on the path finding start point and the path finding end point to obtain a normal path, and the specific method includes:
if one direction is returned to the source network element or the sink network element, stopping alternate returning, and continuing returning and routing to the direction which is not returned to the source network element or the sink network element;
if the alternate returning network element routing calculation between the routing start point and the routing end point fails, returning the routing start point to the source network element, returning the routing end point to the sink network element, and searching for a sixth new network element 56 between the paths of the source network element and the sink network element;
the source network element transmits a signal to the sink network element through the sixth new network element 56;
the reroute forms a sixth new path W6.
In this embodiment, if the network element at one end has taken the lead to back to the source network element or the sink network element, whether the alternate back-off network element routing calculation is performed according to the routing start point and the routing end point or the routing failure is performed, the routing start point has backed to the source network element, and the routing end point has backed to the sink network element, at this time, the sixth new network element 56 between the paths of the source network element and the sink network element is searched, the routing calculation between the source network element and the sink network element is completed, and the obtained reroute forms the sixth new network element 56 to avoid the fault. The path W6 is indicated by a bold solid line in fig. 8.
If the final path finding of the source network element and the destination network element fails, manual intervention is needed at the moment, new equipment or connecting fibers are laid, then the soft rerouting is manually operated, and the dynamic path finding downloading switching operation is triggered.
In order to reduce the time for basic configuration and service configuration, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, for a calculated normal path, deleting an original failed path configuration on a device, and activating and downloading a configuration of the normal path to the device, where the specific method includes:
for a network element in the multiplexed original path, wherein:
the source port basic configuration of the initial alarm point network element 1 is unchanged, the original service configuration is deleted, and the sink port basic configuration and the service configuration of the initial alarm point network element 1 are unchanged;
the destination port basic configuration of the alarm ending point network element 2 is unchanged, the original service configuration is deleted, and the source port basic configuration and the service configuration of the alarm ending point network element 2 are downloaded again;
the basic configuration of the source port of the first network element 3 is unchanged, the original service configuration is deleted, and the basic configuration of the sink port and the service configuration of the first network element 3 are downloaded again;
the source port basic configuration of the second network element 4 is unchanged, the original service configuration is deleted, and the sink port basic configuration and the service configuration of the second network element 4 are downloaded again;
for a new network element 5 in a rerouted new path, the sink port and source port traffic configuration and the base configuration of the new network element 5 are activated and downloaded to the device.
In this embodiment, a network element in a multiplexing original path can improve a routing rate, the configuration on a network element port in the original path is divided into basic configuration and service configuration, if a new path is formed by rerouting, a network element that sends a signal to a network element in the original path changes, the basic configuration of a network element source port in the original path is unchanged, the original service configuration is deleted, and if the network element in the original path starts sending a signal to the new network element, the basic configuration of a network element sink port in the original path is unchanged, and the original service configuration is deleted.
For example, in a scenario one, as shown in fig. 10, a path finding start network element or a path finding end network element is an intermediate network element, and may be applied to a case where there is no protection path:
a, deactivating W paths (where > may exist in the middle of paths) between a network element A and a network element B, deactivating W path configurations inside the network element A and the network element B, and modifying the state of the W paths to be inactive;
b, activating the W1 path and the service layer path (there may be > 0 network elements in the middle of the path) of the network element a and the network element B, activating the W1 path configuration inside the network element a and the network element B, and modifying the activation state of the W1 path to be activated.
In this case, it is not necessary to download all the configurations of the path segments of the network element S and the network element a again, and it is not necessary to download all the configurations of the path segments of the network element B and the network element D.
In this case, only the intermediate routing segment of the working path is rerouted, which has no influence on the protection group service and does not deactivate or activate the protection group service.
In a second scenario, as shown in fig. 11, the path finding start network element is a source network element or the path finding end network element is a sink network element, and the scenario may be applied to a case where there is no protection path:
the crossing on the source and destination network elements in the scenario is protection group crossing, if the source and destination network elements are POTN network element devices, multicast configuration exists, the crossing and the multicast configuration of the protection group service are both accompanied with Client service downloading, and if the ODUk is rerouted, the modification of the crossing and the multicast of the protection group service is involved. The cross and multicast of protection group traffic only exists on the source and sink network elements.
a, if the ODUk protection group service has a Client layer service, acquiring the crossing or multicast configuration of the protection group from the Client layer, and deactivating the crossing or multicast configuration.
Deactivating the configuration of the W path in the source network element S and the network element a, deactivating the W path between the source network element S and the network element a (there may be > 0 network elements in the middle of the path), and modifying the state of the W path to be inactive;
c, activating the path configuration of the W1 in the source network element S and the network element A, activating a W1 path and a service layer path between the source network element S and the network element A (the path may exist in the middle of the path) = 0 network elements), and modifying the state of the W1 path to be activated;
and d, activating the configuration of the protection group service on the source network element S, if a Client layer exists and the state is an activated or partially activated state, activating the Client layer service of the network element S, and associating and activating the cross and multicast configuration of the protection group service through the Client service. If the Client service is not activated, the Client service does not need to be activated, because the Client is not activated, the user can manually activate the Client service by himself, and at the moment, the cross and the multicast of the downloading protection group service can be automatically associated and activated.
e, all the old configurations between network element a and network element D of the scenario do not need to be downloaded again.
The second embodiment:
an apparatus for dynamically switching transport network rerouting traffic, the apparatus comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions programmed to perform a method for dynamic switching of transport network rerouting traffic as provided by an embodiment.
Fig. 12 is a schematic diagram of a device for dynamically switching rerouting traffic based on a transport network according to an embodiment of the present invention. The apparatus for dynamic switching of transport network rerouting traffic based on the present embodiment comprises one or more processors 21 and a memory 22. In fig. 12, one processor 21 is taken as an example.
The processor 21 and the memory 22 may be connected by a bus or other means, such as the bus connection in fig. 4.
The memory 22, as a non-volatile computer-readable storage medium, can be used to store a non-volatile software program and a non-volatile computer-executable program, such as the method for comparing database data based on the database B-tree in the first embodiment. The processor 21 executes the log resolution based database delete column synchronization method by executing non-volatile software programs and instructions stored in the memory 22.
The memory 22 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 22 may optionally include memory located remotely from the processor 21, which may be connected to the processor 21 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 22, and when executed by the one or more processors 21, perform the method for comparing database data based on the database B-tree in the first to third embodiments, for example, perform the steps shown in fig. 1 to 3 described above.
It should be noted that, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for dynamically switching transport network rerouting service is characterized in that the method comprises the following steps:
the network management analyzes the received equipment alarm command, judges an alarm point network element and analyzes a path searching starting point and a path searching ending point of the service fault;
the alarm point network element is divided into a starting alarm point network element (1) and an ending alarm point network element (2), wherein:
the network element which is close to the source network element and fails in receiving the direction signal is the initial alarm point network element (1), and the network element which is close to the host network element and fails in receiving the direction signal is the ending alarm point network element (2);
the path searching starting point is a source port of a first network element (3) which sends a transmission signal to the initial alarm point network element (1);
the route searching end point is a host port of the network element (2) of the end warning point;
the normal path segment combination of the original path between the initial alarm point network element (1) and the second network element (4) which sends signals to the ending alarm point network element (2) is stored in a cache;
the network management initiates a rerouting command, and performs routing calculation between the routing starting point and the routing ending point to obtain a normal path;
for the normal path obtained by calculation, deleting the original fault path configuration on the equipment, and activating and downloading the configuration of the normal path to the equipment;
and after the configuration downloading is successful, replacing the fault path to recover the service communication, and completing the service switching after the rerouting replacing connection is successful.
2. The method according to claim 1, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
if at least two normal connecting fibers exist between the first network element (3) and the initial alarm point network element (1) and between the second network element (4) and the end alarm point network element (2) in the original path, and when one of the normal connecting fibers in the original path fails, the rerouting switching uses other normal connecting fibers;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the initial alarm point network element (1), the ending alarm point network element (2), the first network element (3) and the second network element (4), and changing the service configuration of the multiplexing network element;
the first network element (3) transmits a signal to the initial alarm point network element (1), and the second network element (4) transmits a signal to the ending alarm point network element (2);
the reroute forms a first new path W1.
3. The method according to claim 1, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
if a normal fiber connection exists between the first network element (3) and the initial alarm point network element (1) and between the second network element (4) and the end alarm point network element (2) in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing the normal path segment of the original path, and simultaneously multiplexing the first network element (3) and the alarm ending point network element (2);
finding a first new network element (51) between the first network element (3) and the path of the alarm ending point network element (2) in the routing process, wherein the first network element (3) transmits a signal to the alarm ending point network element (2) through the first new network element (51);
the reroute forms a second new path W2.
4. The method according to claim 1, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
if a normal fiber connection exists between the first network element (3) and the initial alarm point network element (1) and between the second network element (4) and the end alarm point network element (2) in the original path, rerouting and searching other paths after the normal fiber connection fails;
multiplexing a normal path segment of an original path, and simultaneously multiplexing the initial alarm point network element (1), the ending alarm point network element (2), the first network element (3) and the second network element (4);
finding a second new network element (52) between the first network element (3) and the initial alarm point network element (1) path in the routing process, wherein the first network element (3) transmits a signal to the initial alarm point network element (1) through the second new network element (52);
finding a third new network element (53) between the second network element (4) and the path of the alarm ending point network element (2) in the routing process, wherein the second network element (4) transmits a signal to the alarm ending point network element (2) through the third new network element (53);
the reroute forms a third new path W3.
5. The method according to claim 1, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
performing alternate rollback network element routing calculation on the routing starting point and the routing end point;
multiplexing the first network element (3) or the end alarm point network element (2);
the first network element (3) backs to the direction of a source network element, one network element backs each time, a normal path between a first fallback network element (31) and the first network element (3) is stored in a cache, the network element (2) at the end of the alarm point backs to the direction of a sink network element, one network element backs each time, and a normal path between a second fallback network element (21) and the network element (2) at the end of the alarm point is stored in a cache;
searching for a fourth new network element (54) between the first network element (3) and the second fallback network element (21) path or the end alarm point network element (2) and the first fallback network element (31), wherein the first fallback network element (31) transmits a signal to the second fallback network element (21) through the fourth new network element (54);
the reroute forms a fourth new path W4.
6. The method according to claim 5, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
after the path-finding starting point and the path-finding end point respectively perform a round of alternate fallback network element path finding, if the path finding between the first fallback network element (31) and the end alarm point network element (2) and between the first network element (3) and the second fallback network element (21) fails;
finding a fifth new network element (55) between the first fallback network element (31) and the second fallback network element (21) path;
-the first fallback network element (31) transmits a signal to the second fallback network element (21) through the fifth new network element (55);
the reroute forms a fifth new path W5.
7. The method according to claim 1, wherein the network manager initiates a rerouting command to perform a routing calculation on the routing start point and the routing end point to obtain a normal path, and the specific method comprises:
if one direction is returned to the source network element or the sink network element, stopping alternate returning, and continuing returning and routing to the direction which is not returned to the source network element or the sink network element;
if the continuous returning and routing fails, the routing starting point returns to the source network element, the routing end point returns to the sink network element, and a sixth new network element (56) between the paths of the source network element and the sink network element is searched;
the source network element transmitting a signal to the sink network element through the sixth new network element (56);
the reroute forms a sixth new path W6.
8. The method according to claim 1, wherein for the calculated normal path, deleting an original configuration of a failed path on the device, and activating and downloading the configuration of the normal path to the device, the specific method includes:
for a network element in the multiplexed original path, wherein:
the basic configuration of the destination port of the initial alarm point network element (1) is unchanged, the original service configuration is deleted, and the basic configuration and the service configuration of the source port of the initial alarm point network element (1) are downloaded again;
the basic configuration of the destination port of the alarm ending point network element (2) is unchanged, the original service configuration is deleted, and the basic configuration of the source port and the service configuration of the alarm ending point network element (2) are downloaded again;
the basic configuration of the source port of the first network element (3) is unchanged, the original service configuration is deleted, and the basic configuration of the sink port and the service configuration of the first network element (3) are downloaded again;
the basic configuration of the source port of the second network element (4) is unchanged, the original service configuration is deleted, and the basic configuration of the sink port and the service configuration of the second network element (4) are downloaded again;
for a new network element (5) in a rerouted new path, the sink port and source port traffic configuration and the base configuration of the new network element (5) are activated and downloaded onto a device.
9. An apparatus for dynamically switching transport network rerouting traffic, the apparatus comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being configured by the processor to perform the method of dynamic switching of transport network rerouting traffic according to any of claims 1 to 8.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859156A (en) * | 2005-07-15 | 2006-11-08 | 华为技术有限公司 | Restoring method for link fault |
| CN1885789A (en) * | 2005-06-23 | 2006-12-27 | 华为技术有限公司 | Channel failure handling method in ASON |
| CN101223722A (en) * | 2005-12-23 | 2008-07-16 | 中兴通讯股份有限公司 | Method for soft re-routing in optical network |
| CN101248630A (en) * | 2005-12-09 | 2008-08-20 | 中兴通讯股份有限公司 | Method for implementing automatic exchange optical network fast heavy route |
| CN101286892A (en) * | 2007-04-12 | 2008-10-15 | 华为技术有限公司 | Device and method for service recovery |
| CN101924697A (en) * | 2010-06-30 | 2010-12-22 | 北京科技大学 | Two-way startup recovery method based on link back backtracking strategy |
| CN105978741A (en) * | 2016-07-15 | 2016-09-28 | 清华大学深圳研究生院 | Network fault handling method and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8243586B2 (en) * | 2009-11-24 | 2012-08-14 | At&T Intellectual Property I, L.P. | Cross-layer reconfiguration method for surviving multiple-link network failures |
| WO2016165061A1 (en) * | 2015-04-14 | 2016-10-20 | 华为技术有限公司 | Service protecting method and device |
-
2021
- 2021-06-22 CN CN202110692461.XA patent/CN113365165B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885789A (en) * | 2005-06-23 | 2006-12-27 | 华为技术有限公司 | Channel failure handling method in ASON |
| CN1859156A (en) * | 2005-07-15 | 2006-11-08 | 华为技术有限公司 | Restoring method for link fault |
| CN101248630A (en) * | 2005-12-09 | 2008-08-20 | 中兴通讯股份有限公司 | Method for implementing automatic exchange optical network fast heavy route |
| CN101223722A (en) * | 2005-12-23 | 2008-07-16 | 中兴通讯股份有限公司 | Method for soft re-routing in optical network |
| CN101286892A (en) * | 2007-04-12 | 2008-10-15 | 华为技术有限公司 | Device and method for service recovery |
| CN101924697A (en) * | 2010-06-30 | 2010-12-22 | 北京科技大学 | Two-way startup recovery method based on link back backtracking strategy |
| CN105978741A (en) * | 2016-07-15 | 2016-09-28 | 清华大学深圳研究生院 | Network fault handling method and system |
Non-Patent Citations (1)
| Title |
|---|
| 光网络中的分布式故障管理;郑滟雷等;《光通信研究》;20080210(第01期);全文 * |
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