CN109743112B - OTN networking method, device, equipment and computer readable storage medium - Google Patents
OTN networking method, device, equipment and computer readable storage medium Download PDFInfo
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- CN109743112B CN109743112B CN201811617294.7A CN201811617294A CN109743112B CN 109743112 B CN109743112 B CN 109743112B CN 201811617294 A CN201811617294 A CN 201811617294A CN 109743112 B CN109743112 B CN 109743112B
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Abstract
The invention discloses an OTN networking method, a device, equipment and a computer readable storage medium, wherein the method comprises the following steps: after a networking instruction for OTN networking is received, setting at least two core sites in the same city according to the networking instruction, and setting at least one convergence site for each core site; two OTN planes which are mutually main and standby channels are deployed between any two sites and are respectively marked as a first plane and a second plane; and if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel, switching the optical signal to the protection channel of the second plane. The invention reduces the cost of the networking scheme of the distributed multi-active data center and improves the stability of the link of the networking scheme of the distributed multi-active data center.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an OTN networking method, apparatus, device, and computer-readable storage medium.
Background
In the era of full-service operation, telecom operators are transformed into ICT integrated service providers. The richness of the service brings higher requirements for bandwidth, which is directly reflected as requirements for the capability and performance of the transport network. An Optical Transport Network (OTN) technology can meet various new service requirements, and gradually moves from the back of a screen to the front of a platform, thereby becoming a main direction of development of a Transport Network. The advantage of the operator is to have a telecom license plate, have a wide coverage of fiber resources including data centers, buildings and public facilities in metropolitan areas. The metropolitan area transmission network of the internet company is an optical fiber resource of a renting operator, has complex metropolitan area OTN networking, covers a same city data center, office buildings and the like, and provides internet service for the public.
In combination with the wide-range natural disasters appearing in China in recent years, a disaster recovery mode of 'two places and three centers' of a double-center and a remote disaster recovery center in the same city is also appeared, and the scheme has high availability and disaster recovery capability. The two places and the three centers are a commercial disaster recovery backup solution of double centers in the same city and remote disaster recovery, the two places are in the same city and remote places, and the three centers are a production center, a disaster recovery center in the same city and a remote disaster recovery center (the production center, the disaster recovery center in the same city and the remote disaster recovery center). In a "two-place-three-center" architecture, it is common to have point-to-point OTN networking between two data centers. However, the metropolitan OTN architecture of the operator and the internet has low requirement on reliability, the coverage and the network bandwidth are expanded within the cost range, and the operator promises that the failure recovery time is not equal to 30 minutes to 4 hours according to the service level of the line, which cannot meet the networking requirement of the distributed multi-active data center.
The networking scheme of the current distributed multi-active data center is that optical fibers are directly connected with data communication equipment, namely the optical fibers are directly connected with a switch or a router, or the optical fibers are directly connected with digital communication equipment of a special line of an operator. However, because the optical fiber resources that users can rent are limited, the networking scheme of the existing distributed multi-active data center has high cost, large-bandwidth networking is difficult to realize, and the link stability depends on the optical fiber quality, so that the link stability of the networking scheme of the existing distributed multi-active data center is poor.
Disclosure of Invention
The invention mainly aims to provide an OTN networking method, an OTN networking device, OTN networking equipment and a computer readable storage medium, and aims to solve the technical problems of high cost and poor link stability of the existing networking scheme of a distributed multi-active data center.
In order to achieve the above object, the present invention provides an OTN networking method, which includes the steps of:
after a networking instruction for OTN networking is received, setting at least two core sites in the same city according to the networking instruction, and setting at least one convergence site for each core site;
two OTN planes which are mutually main and standby channels are deployed between any two sites and are respectively marked as a first plane and a second plane;
and if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel, switching the optical signal to the protection channel of the second plane.
Preferably, the step of deploying two OTN planes serving as primary and secondary channels between any two sites, which are respectively marked as a first plane and a second plane, includes:
two OTN planes are arranged between any two stations and are respectively marked as a first plane and a second plane;
deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane;
and deploying service channels of even waves on the second plane, and deploying protection channels of the even waves on the first plane to obtain the first plane and the second plane of mutually primary and backup channels.
Preferably, if at least two links are established between any two sites, before the step of switching the optical signal to the protection channel of the second plane if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, the method further includes:
distributing half of links between any two sites to the first plane, and distributing the other half of links to the second plane to obtain links distributed by any two sites;
and performing link aggregation on the links distributed by any two sites to obtain an aggregated link.
Preferably, after the step of deploying two OTN planes as the primary and secondary channels between any two sites, which are respectively marked as the first plane and the second plane, the method further includes:
when the optical signal enters a channel corresponding to the first plane from a tail fiber of the first plane, converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer;
and when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the Ethernet optical signal.
Preferably, before the step of switching the optical signal to the protection channel of the second plane if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, the method further includes:
determining the maximum flow required by the first plane and the second plane network element, and correspondingly selecting the OTN bandwidth corresponding to the optical signal transmitted by the first plane and the second plane according to the maximum flow.
Preferably, if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, the step of switching the optical signal to the protection channel of the second plane includes:
if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the first plane service channel, whether a buffering time delay is set at a port at the client side is detected;
and if the client side port is provided with buffering delay, not interrupting the service request corresponding to the optical signal in the first plane within the time length corresponding to the buffering delay, and switching the optical signal to a link corresponding to the second plane protection channel.
In addition, to achieve the above object, the present invention further provides an OTN networking device, where the OTN networking device includes:
the device comprises a setting module, a configuration module and a configuration module, wherein the setting module is used for setting at least two core sites in the same city according to a networking instruction after receiving the networking instruction for OTN networking, and setting at least one convergence site for each core site;
the deployment module is used for deploying two OTN planes which are mutually a main channel and a standby channel between any two sites and respectively marked as a first plane and a second plane;
and the switching module is used for switching the optical signal to the protection channel of the second plane if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel.
In addition, in order to achieve the above object, the present invention further provides an OTN networking device, where the OTN networking device includes a memory, a processor, and an OTN networking program stored on the memory and capable of running on the processor, and when the OTN networking program is executed by the processor, the steps of the OTN networking method are implemented.
In addition, in order to achieve the above object, the present invention further provides a computer-readable storage medium, where an OTN networking program is stored on the computer-readable storage medium, and when the OTN networking program is executed by a processor, the steps of the OTN networking method are implemented.
The method comprises the steps that at least two core sites are arranged in the same city, and at least one convergence site is arranged for each core site; two planes which are mutually main and standby channels are arranged between any two stations and are respectively marked as a first plane and a second plane; if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel, switching the optical signal into a protection channel of the second plane, converging one or more data centers with closer geographic positions through a convergence station, wherein the convergence station is used as a data center outlet to be communicated with other data centers with farther geographic positions through a core station (if a certain station is farther from the core station but is closer to the convergence station, the data centers can be connected into the convergence station and connected with the core station through the convergence station without being connected into the core station), so that the problem that too many optical fibers are used due to too far distance between the data centers with farther geographic positions and the core station is avoided, and the cost of a networking scheme of the distributed multi-active data center is reduced, and the stability of the distributed multi-active data center networking scheme link is improved by deploying mutually-active OTN planes between any two sites.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flow chart of a preferred embodiment of the OTN networking method of the present invention;
fig. 3 is a schematic diagram of a connection between a core site and a sink site in an embodiment of the present invention;
FIG. 4 is a schematic diagram of two planes established between any two sites in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first plane of traffic channels and a first plane of guard channels in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second plane of traffic channels and guard channels in an embodiment of the present invention;
fig. 7 is a schematic diagram of link aggregation in an embodiment of the invention;
fig. 8 is a schematic diagram of a cross-site link in an embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 1 is a schematic structural diagram of a hardware operating environment of an OTN networking device. The OTN networking device in the embodiment of the invention can be a transmission device for processing signals.
As shown in fig. 1, the OTN networking device may include: a processor 1001, such as a CPU, a network interface 1004, a memory 1005, and a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the OTN networking device architecture shown in fig. 1 does not constitute a limitation of OTN networking devices and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include an operating system, a network communication module, and an OTN networking program therein. The operating system is a program for managing and controlling hardware and software resources of the OTN networking equipment, and supports the operation of the OTN networking program and other software or programs.
In the OTN networking device shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; and the processor 1001 may be configured to call the OTN networking program stored in the memory 1005, and perform the following operations:
after a networking instruction for OTN networking is received, setting at least two core sites in the same city according to the networking instruction, and setting at least one convergence site for each core site;
two OTN planes which are mutually main and standby channels are deployed between any two sites and are respectively marked as a first plane and a second plane;
and if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel, switching the optical signal to the protection channel of the second plane.
Further, the step of deploying two OTN planes, which are mutually primary and secondary channels, between any two sites and are respectively marked as a first plane and a second plane includes:
two OTN planes are arranged between any two stations and are respectively marked as a first plane and a second plane;
deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane;
and deploying service channels of even waves on the second plane, and deploying protection channels of the even waves on the first plane to obtain the first plane and the second plane of mutually primary and backup channels.
Further, if at least two links are established between any two sites, before the step of switching the optical signal to the protection channel of the second plane if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, the processor 1001 may be further configured to call an OTN networking program based on a block chain stored in the memory 1005, and execute the following steps:
distributing half of links between any two sites to the first plane, and distributing the other half of links to the second plane to obtain links distributed by any two sites;
and performing link aggregation on the links distributed by any two sites to obtain an aggregated link.
Further, after the step of deploying two OTN planes as primary and standby channels each other between any two sites and recording the two OTN planes as a first plane and a second plane, respectively, the processor 1001 may be further configured to call an OTN networking program based on a block chain stored in the memory 1005, and execute the following steps:
when the optical signal enters a channel corresponding to the first plane from a tail fiber of the first plane, converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer;
and when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the Ethernet optical signal.
Further, if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, before the step of switching the optical signal to the protection channel of the second plane, the processor 1001 may be further configured to call an OTN networking program based on a block chain stored in the memory 1005, and execute the following steps:
determining the maximum flow required by the first plane and the second plane network element, and correspondingly selecting the OTN bandwidth corresponding to the optical signal transmitted by the first plane and the second plane according to the maximum flow.
Further, if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, the step of switching the optical signal to the protection channel of the second plane includes:
if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the first plane service channel, whether a buffering time delay is set at a port at the client side is detected;
and if the client side port is provided with buffering delay, not interrupting the service request corresponding to the optical signal in the first plane within the time length corresponding to the buffering delay, and switching the optical signal to a link corresponding to the second plane protection channel.
Based on the above structure, various embodiments of the OTN networking method are proposed.
Referring to fig. 2, fig. 2 is a flow chart of a preferred embodiment of the OTN networking method of the present invention.
Embodiments of the present invention provide an OTN networking method, and it should be noted that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that shown or described here.
The OTN networking method is applied to OTN networking equipment. In the various embodiments of the OTN networking method, for convenience of description, the execution subject is omitted to illustrate the various embodiments. The OTN networking method comprises the following steps:
step S10, after a networking instruction for OTN networking is received, at least two core sites are set in the same city according to the networking instruction, and at least one convergence site is set for each core site.
The optical fiber is a physical channel for optical communication between OTN network elements, and single-fiber bidirectional communication and double-fiber bidirectional communication can be selected in an OTN system. The two-fiber bidirectional communication mode is usually an OTN device in which a pair of optical fibers are used to dock two end sites, and the mode has more stable communication quality and can provide larger communication bandwidth. In the embodiment of the invention, multiple pairs of optical fibers are connected between any two stations, and the different optical fibers adopt mutually independent availability ratios, namely different routes, different pipelines or different optical cables are adopted between the different optical fibers, so that when the optical cable where the optical fiber is positioned fails, only one pair of optical fibers is influenced, and other optical fibers between the corresponding two stations are not influenced. It will be appreciated that if pairs of optical fibres physically belong to the same cable, the same conduit or the same route, the risk of site outages is increased. The pipelines include, but are not limited to, municipal pipelines, incoming wells, building weak wells and wiring troughs in a machine room.
After a networking instruction for OTN networking is received, at least two core sites are set in the same city according to the networking instruction, and at least one convergence site is set for each core site. Wherein, the core site is a data exchange point of the convergence layer transmission equipment. The networking instruction can be triggered by a user according to specific needs, or automatically triggered by a preset timing task in a server or a terminal. It should be noted that, in the embodiment of the present invention, the same-city distributed data center is divided into at least two core sites, so as to implement the OTN networking requirement of the data center in the distributed multi-activity architecture. Each core site and all the aggregation sites are directly connected through optical fibers, and the aggregation sites are also directly connected through the optical fibers. In specific application, a core site should select a data center with a stable physical environment, sufficient cabinets and power resources, sufficient optical fiber resources and no significant construction projects around the data center, and the position of the core site should consider the distance from other data centers, that is, the position of the core site should consider the distance from other core sites and a convergence site, so as to avoid high optical fiber construction cost caused by too long distance between any two sites. In particular, a schematic diagram of the connection between the core site and the aggregation site can be seen in fig. 3.
Further, in the embodiment of the present invention, the core sites are in the same city, the number of the core sites in the same city is at least two, the core sites in the same city may also be set to be multiple, but the two core sites are not required to be fully interconnected and networked, so that the fiber cost between any two core sites is increased, the complexity of OTN networking is improved, and the complexity of upper layer routing protocol link selection is improved, therefore, in this embodiment, the number of the core sites is preferably set to be two.
Step S20, two OTN planes that are primary and secondary channels of each other are deployed between any two sites, and are respectively recorded as a first plane and a second plane.
After the core site and the aggregation site are set, two OTN planes which are mutually main channels and standby channels are deployed between any two sites, the two planes are respectively marked as a first plane and a second plane, and each plane adopts double-fiber bidirectional communication. It can be understood that two mutually active and standby OTN planes are deployed between any two sites, that is, two mutually active and standby OTN planes may be set between a core site and a convergence site, or two mutually active and standby OTN planes may be set between a core site and a core site, or two mutually active and standby OTN planes may be set between a convergence site and a convergence site.
It should be noted that, in each plane, there are at least two network elements, and one network element may correspond to one device or may correspond to multiple devices. Specifically, referring to fig. 4, in fig. 4, an OTN plane a and an OTN plane B are established between a station X and a station Y, and a network element a of the station X is connected to a network element a of the station Y through an optical fiber, and a network element B of the station X is connected to a network element B of the station Y through an optical fiber.
Further, in order to improve stability and effectiveness of OTN networking, after step S20, the OTN networking method further includes:
step a, determining the maximum flow required by the first plane and the second plane network element, and correspondingly selecting the OTN bandwidth corresponding to the optical signal transmitted by the first plane and the second plane according to the maximum flow.
After the first plane and the second plane are set, determining the maximum flow required by the first plane network element, selecting the OTN bandwidth corresponding to the optical signal transmitted by the first plane according to the maximum flow, determining the maximum flow required by the second plane network element, and selecting the OTN bandwidth corresponding to the optical signal transmitted by the second plane according to the maximum flow required by the second plane network element. Specifically, the OTN bandwidth of a single wave 10G (gigabyte), 40G, 100G, 200G, or 400G may be selected according to the maximum traffic. If the maximum flow rate is 9G, the OTN bandwidth of single wave 10G can be selected.
Further, the wavelengths corresponding to the first plane and the second plane can adopt an OTN system of 40 waves or 80 waves according to actual needs.
Further, step S20 includes:
b, setting two OTN planes between any two stations, and respectively recording the OTN planes as a first plane and a second plane;
and c, deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane.
And d, deploying the service channels of the even waves on the second plane, and deploying the protection channels of the even waves on the first plane to obtain the first plane and the second plane which are mutually main channels and standby channels.
Specifically, two OTN planes are set between any two sites and are respectively marked as a first plane and a second plane, service channels of odd waves are deployed on the first plane, protection channels of odd waves are deployed on the second plane, service channels of even waves are deployed on the second plane, and protection channels of even waves are deployed on the first plane, so that the first plane and the second plane which are main channels and standby channels of each other are obtained. Specifically, when the first plane and the second plane employ a 40-wave OTN system, the first plane and the second plane OTN system are as shown in fig. 5 and 6. In fig. 5, in the first plane (plane a), odd waves shown in bold are the traffic channels of plane a, and even waves shown in bold are the guard channels of plane B (second plane); in the second plane of fig. 6, even channels shown in bold are traffic channels of the second plane, and odd channels not shown in bold are guard channels of the first plane. In the embodiment of the invention, the wave channel is taken as the minimum protection granularity.
It will be appreciated that for a first plane, the first plane is the primary plane and the second plane is the backup plane; for the second plane, the first plane is the standby plane and the second plane is the main plane.
Further, after step b, step S20 may further include:
and deploying service channels of odd waves on the second plane, and deploying protection channels of the odd waves on the first plane.
And deploying service channels of even waves on the first plane, and deploying protection channels of the even waves on the second plane to obtain the first plane and the second plane of the mutually primary and backup channels.
Step S30, if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the first plane service channel, switching the optical signal to the protection channel of the second plane.
When a first plane and a second plane which are mutually a master plane and a standby plane are set, whether preset alarm information is output by an optical signal at a wavelength division side in a corresponding link of a first plane service channel is monitored. A link is a channel for transmitting data between two switches or routers. The preset Alarm information is preset, and includes, but is not limited to, AIS (Alarm Indication Signal), OCI (Open Connection Indicator), LCK (Locked Alarm), and SSF (service Signal Failure Alarm), for example. And if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the first plane service channel, switching the optical signal from the first plane service channel to a second plane protection channel. It can be understood that, as long as any set alarm information is output in the link corresponding to the first plane service channel, the optical signal of the first plane is switched from the service channel of the first plane to the protection channel of the second plane. If the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the service channel of the second plane, the optical signal can be directly switched from the service channel of the second plane to the protection channel of the first plane.
Further, the preset alarm information may be output when the power of the optical signal is smaller than a preset threshold, that is, if it is detected that the power of the optical signal in the link corresponding to the first plane service report is smaller than the preset threshold, the alarm information with low power is output to switch the optical signal to the protection channel of the second plane, where the preset threshold may be set according to specific needs, and the preset threshold is not specifically limited in this embodiment.
Further, if it is not monitored that the optical signal at the wavelength division side outputs the preset alarm information in the link corresponding to the first plane service channel, it is continuously monitored whether the optical signal at the wavelength division side outputs the preset alarm information in the link corresponding to the first plane service channel.
If 4 links are required for a certain communication service, λ 1, λ 2, λ 3, and λ 4 are assigned as links for the communication service. The service channels of the lambda 1 and the lambda 3 are on a first plane, and the protection channels are on a second plane; the service channels of lambda 2 and lambda 4 are in the second plane and the guard channels are in the first plane. If the main optical fiber corresponding to the first plane is interrupted, the service channels of the lambda 1 and the lambda 3 can be switched to the corresponding protection channels of the second plane. In this process, the λ 1 and λ 3 links are interrupted for a certain time, but since the channel quality of the λ 2 and λ 4 links is not affected, the user cannot perceive the impact of the interruption of the λ 1 and λ 3 links on the communication service. In this embodiment, the interruption duration may be determined according to specific situations, for example, the interruption duration may be 50ms (milliseconds), or 40 ms. Therefore, by setting two mutually-active OTN planes, the influence of channel switching on services is reduced, and like the situation that if a plurality of links are opened for the services and are evenly distributed on a first plane and a second plane, if an optical fiber of the first plane fails, a channel is switched to the second plane within 50ms, a client-side port may interrupt the services, but in the process, the channel originally distributed on the second plane is not influenced.
In the embodiment, at least two core sites are arranged in the same city, and at least one aggregation site is arranged for each core site; two planes which are mutually main and standby channels are arranged between any two stations and are respectively marked as a first plane and a second plane; if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel, switching the optical signal into a protection channel of the second plane, converging one or more data centers with closer geographic positions through a convergence station, wherein the convergence station is used as a data center outlet to be communicated with other data centers with farther geographic positions through a core station (if a certain station is farther from the core station but is closer to the convergence station, the data centers can be connected into the convergence station and connected with the core station through the convergence station without being connected into the core station), so that the problem that too many optical fibers are used due to too far distance between the data centers with farther geographic positions and the core station is avoided, and the cost of a networking scheme of the distributed multi-active data center is reduced, and the stability of the distributed multi-active data center networking scheme link is improved by deploying mutually-active OTN planes between any two sites.
Further, a second embodiment of the OTN networking method of the present invention is provided.
The second embodiment of the OTN networking method is different from the first embodiment of the OTN networking method in that the OTN networking method further includes:
and e, distributing half of the links between any two sites to the first plane, and distributing the other half of the links to the second plane to obtain the links distributed by any two sites.
And f, carrying out link aggregation on the links distributed by any two sites to obtain an aggregated link.
In the embodiment of the present invention, the devices corresponding to any two sites may establish multiple links through the OTN. Wherein the device may be a switch or a router, etc. After any two sites establish a plurality of links through the OTN, allocating half of the links between any two sites to a first plane, wherein the corresponding channels of a second plane are taken as protection channels, namely for the half of the links allocated to the first plane, the first plane is taken as a service plane, and the second plane is taken as a protection plane; and distributing the other half of the remaining links to a second plane, wherein for the remaining half of the links distributed to the second plane, the first plane is a protection plane, and the second plane is a service plane, so as to obtain the links distributed by any two sites.
And after the links distributed by any two sites are obtained, performing link aggregation on the links distributed by any two sites to obtain an aggregated link. Specifically, when link aggregation is performed, interfaces corresponding to a plurality of links are configured into a group, the group corresponds to one interface, and the interface corresponding to the group is a link aggregation interface. In the process of performing link aggregation, it is required that both ends of the OTN plane are aggregated simultaneously. Specifically, link aggregation can be seen in fig. 7, where in fig. 7, a switch is set to aggregate multiple ethernet links between site 1 and site 2.
At this time, if the main optical signal in the aggregated link is jittered, at most half of the links under the aggregated link interface are jittered, the other half of the links will keep working normally, and the link aggregated interface will keep connected, that is, the link aggregated interface will keep an UP (connected) state and will not be in a DOWN (disconnected) state, and the convergence of the upper layer routing protocol will not be caused.
It should be noted that a cross-site link configures a routing Protocol such as BGP (Border Gateway Protocol) or OSPF (Open Shortest Path First). If there are no mutually active OTN planes, if there is no member port under the link aggregation interface, that is, the device port corresponding to the link aggregation interface is disconnected, the link aggregation interface may be in a closed state, that is, the link aggregation interface is in a DOWN state, at this time, a routing Protocol neighbor may be caused to be in the DOWN state, a data packet may be lost in a routing Protocol convergence process, and a TCP (Transmission Control Protocol) retransmission may be caused, so that a message bus queue is increased, a service query is overtime, and the like. In this embodiment, half of the links in the aggregated links are allocated to the first plane and the other half of the links are allocated to the second plane by deploying the mutually active and standby OTN planes, so as to avoid that the routing protocol neighbor is in the DOWN state due to the fact that the link aggregated interface is in the DOWN state, thereby improving the reliability of the links.
Further, a third embodiment of the OTN networking method of the present invention is provided.
The third embodiment of the OTN networking method is different from the first or second embodiment of the OTN networking method in that the OTN networking method further includes:
and g, when the optical signal enters the channel corresponding to the first plane from the tail fiber of the first plane, converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer.
And h, when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the ethernet optical signal.
In one link, there are at least two stations. When three or more sites exist for a link, the link is referred to as a cross-site link. Specifically, referring to fig. 8, in fig. 8, a direct link is established between a site 1 and a site 3 through a site 2, and OTN planes which are mutually active and standby are established between the site 1 and the site 2 and between the site 2 and the site 3, so as to reduce the probability of interruption of a cross-site link.
Specifically, when detecting that an optical signal enters a channel corresponding to a first plane from a tail fiber of the first plane, converting the optical signal from an ethernet optical signal into an optical signal transmitted by an optical layer; and when the optical signal is detected to enter the tail fiber from the wave channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into an Ethernet optical signal. The tail fiber is also called a tail wire, only one end of the tail fiber is provided with a connector, the other end of the tail fiber is a broken end of a fiber core of an optical cable, the broken end is connected with fiber cores of other optical cables through fusion splicing, and the broken end is often arranged in an optical fiber terminal box and used for connecting the optical cable and an optical fiber transceiver (a coupler, a jumper wire and the like are also used between the optical cable and the optical fiber transceiver).
As can be seen from fig. 8, in the client side corresponding to the pigtail, the ethernet optical signal is transmitted, and in the wavelength division side corresponding to the OTN plane, the transmitted signal is an optical signal transmitted by the optical layer. In the process of converting the optical signal transmitted by the optical layer into the ethernet optical signal, the signal frame format is converted. It is understood that in the embodiment of the present invention, both the optical signal input into the OTN plane and the optical signal output from the OTN plane are ethernet signals.
It should be noted that the operation process of the optical signal in the second plane is the same as that in the first plane, and details are not described here.
In the cross-site link, the number of sites passed by the link can be infinitely increased, and each time the link passes through one site, the optical layer transmission signal at the wavelength division side is converted into an electric layer Ethernet signal and then transmitted to the next section of channel. The traditional optical layer punch-through mode can reduce the signal-to-noise ratio in the cross-site transmission process, influence the signal transmission distance, and the intermediate site can not monitor the quality of a link, thereby increasing the maintenance difficulty. In the transmission process of the cross-site link in the embodiment of the invention, signals are regenerated (signal conversion) at the intermediate site, the loss of signal-to-noise ratio is avoided, the link is more stable, the intermediate site can monitor the signal quality, and the maintenance and fault judgment are simpler. The conventional optical layer feedthrough method is to amplify an optical signal at a wavelength division side at any station and then directly transmit the amplified optical signal to the next station.
Further, a fourth embodiment of the OTN networking method of the present invention is provided.
The difference between the fourth embodiment of the OTN networking method and the first, second or third embodiment of the OTN networking method is that step S30 further includes:
step i, if the optical signal of the wavelength division side is monitored to output preset alarm information in a link corresponding to the first plane service wave channel, whether a buffering time delay is set on a port on the client side is detected.
And if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the first plane service channel, detecting whether a buffering time delay is set at a port at the client side. The duration corresponding to the buffering delay may be set according to specific needs, but in order to ensure that the optical signal is not interrupted and the service request corresponds to the service request in the first plane, the duration corresponding to the buffering delay may be set to be greater than or equal to the interruption duration.
Step j, if the client-side port is provided with a buffering delay, the service request corresponding to the optical signal in the first plane is not interrupted within a time duration corresponding to the buffering delay, and the optical signal is switched to a link corresponding to the second plane protection channel.
And if the fact that the client side port is provided with the buffering time delay is detected, the service request corresponding to the optical signal in the first plane is not interrupted in the time length corresponding to the buffering time delay, and the optical signal is switched to a link corresponding to the second plane protection channel. Further, if it is detected that the client-side port does not set the buffering delay, in the process of switching the optical signal to the link corresponding to the second plane protection channel, the service request originally in the first plane is interrupted for a short time, but since only a part of the link of the service request is deployed in the service channel of the first plane and a part of the link is deployed in the service channel of the second plane, the user does not perceive the interruption of the service request.
In this embodiment, a buffering delay is set at the client-side port, so that it is ensured that the service request corresponding to the first plane service channel is not interrupted during the service channel switching process.
In addition, an embodiment of the present invention further provides an OTN networking device, where the OTN networking device includes:
the device comprises a setting module, a configuration module and a configuration module, wherein the setting module is used for setting at least two core sites in the same city according to a networking instruction after receiving the networking instruction for OTN networking, and setting at least one convergence site for each core site;
the deployment module is used for deploying two OTN planes which are mutually a main channel and a standby channel between any two sites and respectively marked as a first plane and a second plane;
and the switching module is used for switching the optical signal to the protection channel of the second plane if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the first plane service channel.
Further, the deployment module includes:
the system comprises a setting unit, a processing unit and a processing unit, wherein the setting unit is used for setting two OTN planes between any two stations, and the two OTN planes are respectively marked as a first plane and a second plane;
the deployment unit is used for deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane; and deploying service channels of even waves on the second plane, and deploying protection channels of the even waves on the first plane to obtain the first plane and the second plane of mutually primary and backup channels.
Further, if at least two links are established between any two sites, the OTN networking device further includes:
the distribution module is used for distributing half of links between any two sites to the first plane, and distributing the other half of the links to the second plane to obtain the links distributed by any two sites;
and the aggregation module is used for carrying out link aggregation on the links distributed by any two sites to obtain an aggregated link.
Further, the OTN networking device further includes:
the conversion module is used for converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer when the optical signal enters a channel corresponding to the first plane from a tail fiber of the first plane; and when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the Ethernet optical signal.
Further, the OTN networking device further includes:
a determining module, configured to determine a maximum traffic required by the first plane and the second plane network element;
and the selection module is used for correspondingly selecting the OTN bandwidths corresponding to the optical signals transmitted by the first plane and the second plane according to the maximum flow.
Further, the switching module includes:
the detection unit is used for detecting whether a buffering time delay is set at a port on the client side if the optical signal on the wavelength division side is monitored to output preset alarm information in a link corresponding to a first plane service channel;
a switching unit, configured to, if the client-side port is provided with a buffering delay, not interrupt the service request corresponding to the optical signal in the first plane within a time duration corresponding to the buffering delay, and switch the optical signal to a link corresponding to the second plane protection channel.
The specific implementation of the OTN networking device of the present invention is substantially the same as the embodiments of the OTN networking method described above, and will not be described herein again.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where an OTN networking program is stored on the computer-readable storage medium, and when the OTN networking program is executed by a processor, the steps of the OTN networking method are implemented.
The specific implementation manner of the computer-readable storage medium of the present invention is substantially the same as that of each embodiment of the OTN networking method, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An OTN networking method for an optical transport network, the OTN networking method comprising the steps of:
after a networking instruction for OTN networking is received, setting at least two core sites in the same city according to the networking instruction, and setting at least one convergence site for each core site;
two OTN planes which are mutually main and standby channels are deployed between any two sites and are respectively marked as a first plane and a second plane;
if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the service channel of the first plane, switching the optical signal to a protection channel of the second plane;
the step of deploying two OTN planes between any two sites, which are mutually primary and secondary channels, and respectively marked as a first plane and a second plane, includes:
two OTN planes are arranged between any two stations and are respectively marked as a first plane and a second plane;
deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane;
and deploying service channels of even waves on the second plane, and deploying protection channels of the even waves on the first plane to obtain the first plane and the second plane of mutually primary and backup channels.
2. The OTN networking method according to claim 1, wherein if at least two links are established between any two sites, before the step of switching the optical signal to the protection channel of the second plane if it is monitored that the optical signal at the wavelength division side outputs preset alarm information in the link corresponding to the service channel of the first plane, the method further comprises:
distributing half of links between any two sites to the first plane, and distributing the other half of links to the second plane to obtain links distributed by any two sites;
and performing link aggregation on the links distributed by any two sites to obtain an aggregated link.
3. The OTN networking method according to claim 1, wherein after the step of deploying two OTN planes serving as primary and secondary channels between any two sites, which are respectively denoted as a first plane and a second plane, the method further comprises:
when the optical signal enters a channel corresponding to the first plane from a tail fiber of the first plane, converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer;
and when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the Ethernet optical signal.
4. The OTN networking method according to claim 1, wherein if it is monitored that the optical signal on the wavelength division side outputs preset alarm information in the link corresponding to the service channel of the first plane, before the step of switching the optical signal to the protection channel of the second plane, the method further comprises:
determining the maximum flow required by the network elements of the first plane and the second plane, and correspondingly selecting the OTN bandwidth corresponding to the optical signals transmitted by the first plane and the second plane according to the maximum flow.
5. The OTN networking method according to any one of claims 1 to 4, wherein if it is monitored that the optical signal at the wavelength division side outputs the preset alarm information in the link corresponding to the service channel of the first plane, the step of switching the optical signal to the protection channel of the second plane comprises:
if the optical signal at the wavelength division side is monitored to output preset alarm information in a link corresponding to the service channel of the first plane, whether a buffering time delay is set at a port at the client side is detected;
and if the client side port is provided with buffering delay, not interrupting the service request corresponding to the optical signal in the first plane within the time length corresponding to the buffering delay, and switching the optical signal to a link corresponding to a protection channel of the second plane.
6. An OTN networking apparatus of an optical transport network, the OTN networking apparatus comprising:
the device comprises a setting module, a configuration module and a configuration module, wherein the setting module is used for setting at least two core sites in the same city according to a networking instruction after receiving the networking instruction for OTN networking, and setting at least one convergence site for each core site;
the deployment module is used for deploying two OTN planes which are mutually a main channel and a standby channel between any two sites and respectively marked as a first plane and a second plane;
the switching module is used for switching the optical signal to the protection channel of the second plane if the optical signal at the wavelength division side is monitored to output preset alarm information in the link corresponding to the service channel of the first plane;
the deployment module includes:
the system comprises a setting unit, a processing unit and a processing unit, wherein the setting unit is used for setting two OTN planes between any two stations, and the two OTN planes are respectively marked as a first plane and a second plane;
the deployment unit is used for deploying service channels of odd waves on the first plane, and deploying protection channels of the odd waves on the second plane; and deploying service channels of even waves on the second plane, and deploying protection channels of the even waves on the first plane to obtain the first plane and the second plane of mutually primary and backup channels.
7. The OTN networking device according to claim 6, wherein if at least two links are established between any two sites, the OTN networking device further comprises:
the distribution module is used for distributing half of links between any two sites to the first plane, and distributing the other half of the links to the second plane to obtain the links distributed by any two sites;
and the aggregation module is used for carrying out link aggregation on the links distributed by any two sites to obtain an aggregated link.
8. The OTN networking device according to claim 6, wherein the OTN networking device further comprises:
the conversion module is used for converting the optical signal from an Ethernet optical signal into an optical signal transmitted by an optical layer when the optical signal enters a channel corresponding to the first plane from a tail fiber of the first plane; and when the optical signal enters the pigtail from the channel corresponding to the first plane, converting the optical signal transmitted by the optical layer into the Ethernet optical signal.
9. An OTN networking device of an optical transport network, the OTN networking device comprising a memory, a processor and an OTN networking program stored on the memory and operable on the processor, the OTN networking program, when executed by the processor, implementing the steps of the OTN networking method according to any one of claims 1 to 5.
10. A computer-readable storage medium, on which an optical transport network, OTN, networking program is stored, which when executed by a processor implements the steps of the OTN networking method according to any one of claims 1 to 5.
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| CN105207859B (en) * | 2014-06-16 | 2019-02-26 | 国家电网公司 | OTN network planning setting method in a kind of powerline network |
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