CN101990138B - Wavelength scheduling method and device - Google Patents
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Abstract
The embodiment of the invention discloses a wavelength scheduling method and a wavelength scheduling device, and relates to network communication technology, which can improve the efficiency of wavelength scheduling between stations. The wavelength scheduling method comprises the following steps of: acquiring a route channel corresponding to at least one wavelength according to wavelength resource information between the stations; checking whether each acquired route channel can establish an optical channel path; outputting standby route channels according to a checked result; and establishing the optical channel path for the route channel selected from the standby route channels by a user. The method and the device are suitable for wavelength scheduling in the network communication.
Description
Technical Field
The present invention relates to network communication technologies, and in particular, to a method and an apparatus for wavelength scheduling.
Background
With the development of the communication industry, wavelength division optical communication transmission as a backbone network plays a very important role in the current information industry, and the characteristics of rapidness and large capacity become the main modes of intercontinental, international and provincial information and data transmission. In order to meet the dynamic scheduling of Optical layer services by operators, a wavelength-dynamically-configured wavelength-division multiplexing Optical device (ROADM) has been proposed, which is divided into an Optical layer scheduling multiplexing WSSM and an Optical layer scheduling splitting WSSD. Up to now, 9 × 48 and 9 × 96 wave scheduling capabilities can be realized according to the band WSSM/WSSD.
Fig. 1 is a schematic diagram of a typical end-to-end wavelength scheduling abstraction model in a transport network. NE1, NE2 and NE3 in the figure represent 3 sites respectively. Wherein, the elements in each station represent various single boards, and the various single boards are respectively: the Optical Fiber system comprises a wavelength conversion Unit (Optical Transmission Unit, OTU), a wave combination Unit (M0x), a wave division Unit (D0x), an Optical Fiber access Unit (Fiber Interface Unit, FIU), an Optical layer scheduling wave division Unit WSSD, an Optical layer scheduling wave combination Unit WSSM and an Optical channel monitoring Unit (Optical supervisory channel, OSC). The OTU single board is a starting point of wavelength service, the M0x single board, the D0x single board and the FIU single board do not support service scheduling, and the WSSM single board and the WSSD single board support service scheduling.
The OTU single board is externally connected with a non-optical layer service, such as a Synchronous Digital Hierarchy (SDH) device, and internally connected with an optical fiber, which may be connected to a wavelength combining unit or a wavelength division unit. The outer side of the OTU board is referred to herein as the client side and the inner side is referred to as the line side. The wavelength end-to-end scheduling or Optical Channel (OCh) path creation is actually to implement automatic and fast Optical cross configuration from the line side port of the OTU board of one site to the line side port of the OTU of another site, where the two sites may also be the same site.
In the transmission network management systems in the industry, some network management systems do not support optical layer service scheduling, and some optical layer service scheduling can only realize scheduling of one wavelength at most. The routing is calculated and then the optical cross is established every time the scheduling is realized, and the efficiency of the whole process is low. Compared with the existing wavelength division network which gradually becomes the backbone of communication and data transmission, the networking is more and more complex and more huge, the scheduling is more and more frequent, and the scheduling efficiency of the network management is not obviously improved.
Disclosure of Invention
Embodiments of the present invention provide a wavelength scheduling method and apparatus, which can improve efficiency of wavelength scheduling between sites.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
a method of wavelength scheduling, comprising:
acquiring at least one routing channel corresponding to a wavelength according to the wavelength resource information among the sites;
checking whether the obtained routing channels can create optical channel paths or not;
outputting alternative routing channels according to the checked result;
and creating an optical channel path for the routing channel selected by the user from the alternative routing channels.
A wavelength scheduling apparatus, comprising:
the channel acquiring unit is used for acquiring at least one routing channel corresponding to the wavelength according to the wavelength resource information among the sites;
a checking unit, configured to check whether each routing channel acquired by the channel acquisition unit can create an optical channel path;
the output unit is used for outputting the alternative routing wave channel according to the result verified by the verification unit;
and the creating unit is used for creating an optical channel path for the routing channel selected by the user from the alternative routing channels.
The wavelength scheduling method and the device provided by the embodiment of the invention have the following beneficial effects: the method can obtain alternative routing channels with more than one wavelength, can create corresponding OCh paths according to user requirements, solves the technical problems that in the prior art, at most one wavelength can be scheduled at one time, and the OCh paths can be created for the wavelength, improves the efficiency of wavelength scheduling among sites, and reduces the complexity of scheduling a plurality of wavelengths.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an abstract model of typical end-to-end wavelength scheduling in a transmission network;
fig. 2 is a flowchart illustrating a wavelength scheduling method according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wavelength scheduling apparatus according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a three-site networking system according to a second embodiment of the present invention;
FIG. 5 is a flowchart illustrating checking a routing channel according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram of an alternative routing channel output in the second embodiment of the present invention;
FIG. 7 is a flowchart illustrating a second wavelength scheduling method according to an embodiment of the present invention;
FIG. 8 is a schematic flow chart illustrating batch creation of Och paths according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a wavelength scheduling apparatus according to a second embodiment of the present invention.
Detailed Description
The following describes in detail a wavelength scheduling method and apparatus according to an embodiment of the present invention with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
An embodiment of the present invention provides a wavelength scheduling method, and as shown in fig. 2, the method according to the embodiment of the present invention includes:
s201, obtaining a routing channel corresponding to at least one wavelength according to the wavelength resource information among the sites.
S202, checking whether the acquired routing channels can create optical channel paths.
And S203, outputting the alternative routing wave channel according to the checked result.
S204, creating an optical channel path for the routing channel selected by the user from the alternative routing channels.
To facilitate the deployment of the foregoing method, the present embodiment continues to provide a wavelength scheduling apparatus, as shown in fig. 3, the apparatus includes: an acquisition unit 21, a verification unit 22, an output unit 23, a creation unit 24.
An obtaining unit 21, configured to obtain, according to the wavelength resource information between the sites, at least one routing channel corresponding to a wavelength; a checking unit 22, configured to check whether each routing channel acquired by the acquiring unit 21 can create an optical channel path; an output unit 23, configured to output the alternative routing channels according to the result verified by the verification unit 22; the creating unit 24 is configured to create an optical channel path for a routing channel selected by a user from the alternative routing channels output by the output unit 23.
The wavelength scheduling method and the wavelength scheduling device can obtain multiple optional routing channels with wavelengths, create OCh paths corresponding to the multiple wavelengths according to the needs of users, and improve the efficiency of wavelength scheduling among sites.
Example two
Fig. 7 is a flowchart illustrating a wavelength scheduling method according to a preferred embodiment of the invention. This embodiment may include the steps of:
s301, the server obtains at least one routing channel corresponding to the wavelength according to the wavelength resource statistical information among the sites. The information at least comprises the shortest routing channel and the selectable routing channel of each wavelength between the source site and the destination site.
In the present embodiment, S301 is described below with reference to fig. 4, table 1, and table 2.
For example, for the networking shown in fig. 4, the OBU is a certain optical amplification unit, M is a certain multiplexing unit, D is a certain demultiplexing unit, NE1, NE2, and NE3 are certain sites, and OTU1, OTU2, and OTU3 are OTU boards.
The following assumptions were made:
(1) the wave combining unit M can pass through 48 wavelengths from lambda 1 to lambda 48 in a certain wave band.
(2) The wavelength division unit D can also pass through 48 wavelengths from lambda 1 to lambda 48 in the same wave band.
(3) The optical layer scheduling wave-combining unit WSSM and the optical layer scheduling wave-splitting unit WSSD can pass through 9 multiplied by 48 wavelengths in the same wave band, namely can pass through 9 groups, and each group can pass through the same 48 wavelengths from lambda 1 to lambda 48.
(4) The OTU1 of NE1 and the OTU1 of NE3 pass through at a wavelength λ 1 in a certain band.
(5) The OTU2 of NE1 and the OTU2 of NE3 pass through at a wavelength λ 2 in a certain band.
(6) The OTU3 of NE1 and the OTU3 of NE3 pass through a wavelength λ 3 in a certain wavelength band.
For the networking shown in fig. 4, the following data may be generated according to the wavelength resource statistics information between the sites:
(1) and an optical fiber path between network elements: f1- > f 2;
(2) transport layer fiber paths and transport layer fiber path groups as shown in table 1.
TABLE 1 transport layer optical fiber paths and transport layer optical fiber path groups
(4) Wavelength selection shortest route and optional route: since the three transmission layer optical fiber paths belong to the same group and each transmission layer optical fiber path can pass through 48 wavelengths, the shortest routes selected from λ 1 to λ 48 are all transmission layer optical fiber paths 3; the alternative routes selected from λ 1 to λ 48 are Path 1 and Path 2.
And generating an optional route wave channel according to the optional route, and generating a shortest route wave channel according to the shortest route.
(5) The source optical channel fiber paths available from FIG. 4 are as follows:
①、f3
②、f4
③、f5
the host optical channel fiber paths are as follows:
①、f21
②、f22
③、f23
taking the shortest route channel as an example, the shortest route channel shown in table 2 can be generated according to the above information.
TABLE 2 shortest routing channels generated by networking
The remaining 45 channels, except for λ 1, λ 2 and λ 3, have the same source and sink ends as the shortest-routed transport layer fiber path because there is no source and sink optical channel fiber paths.
S302, the server checks the obtained routing channels so as to determine whether the routing channels can create an OCh path. And the acquired routing channels comprise shortest routing channels and selectable routing channels.
The purpose of the check is to check whether each routing channel can create an OCh path. Since the purpose of end-to-end wavelength service scheduling is to automatically configure dynamic optical cross to form a passable service, if all transmission layer optical fiber paths passed by a certain routing channel are static cross, it is described that the routing channel has no necessity of creating an OCh path.
It should be noted here that, in the networking process, the server already knows the parameters of each board in the network, so the server can directly determine the type of a certain board according to the parameters of the board. Therefore, the type of the single board is judged in the checking process.
Specifically, the verification method is as shown in fig. 5, and may be divided into the following steps:
s3021, for any obtained routing channel, judging whether a source port on the routing channel is connected to an OTU single board, and if so, executing S3022; otherwise, S3035 is executed.
Or S3021 is: for any one obtained routing channel, judging that the routing channel contains a path termination Point (OCh TTP), and if the judgment is yes, executing S3023; otherwise, S3025 is performed.
S3022, judging whether the OTU single board is connected to the host port on the routing channel, and if so, executing S3023; otherwise, S3035 is executed.
S3023, judging whether a ROADM single board exists on the routing channel, and if so, executing S3024; otherwise, S3025 is performed.
S3024, the routing channel may create an OCh path for the corresponding wavelength, and may output the routing channel as an alternative routing channel for the corresponding wavelength.
And S3025, the routing channel cannot create an OCh path for the corresponding wavelength, and the routing channel is excluded.
Specifically, in combination with the networking in fig. 4, taking the shortest route channel obtained by the verification as an example, three shortest route channels that can create an OCh path after the verification are provided, and the wavelengths are λ 1, λ 2, and λ 3, respectively. It can be easily understood from table 2 that, according to the condition during verification, the shortest route source port and the shortest route sink port of λ 1, λ 2, λ 3 of λ 1 to λ 48 wavelengths are both connected to the OTU board, and the remaining λ 4 to λ 48 wavelengths are not, and it can also be seen from fig. 4 that there are a WSSM board and a WSSD board on the three shortest route channels (the two boards belong to the type of ROADM board), so that the shortest route channels after verification are three in total and correspond to λ 1, λ 2, λ 3 respectively. The checking process of the selectable routing wavelength is the same, and is not redundantly described here.
And S303, outputting each alternative routing channel capable of creating the OCh path according to the result verified by the S302 by the corresponding wavelength of the server.
After checking each routing channel acquired in S301, corresponding to each wavelength allowed to pass by the OTU board in the networking, alternative routing channels that can create an OCh path for the wavelength will be output respectively. And, the alternative routing channels corresponding to the output for each wavelength may include the shortest routing channel and the alternative routing channel.
Specifically, taking the networking shown in fig. 4 as an example, the alternative routing channels of λ 1 are respectively output, where the alternative routing channels include the shortest routing channel and the optional routing channel of λ 1; respectively outputting alternative routing channels of the lambda 2, wherein the alternative routing channels comprise shortest routing channels and selectable routing channels of the lambda 2; and respectively outputting alternative routing channels of the lambda 3, wherein the alternative routing channels comprise the shortest routing channel of the lambda 3 and the optional routing channel.
S304, the user selects the required routing channel from the output alternative routing channels corresponding to the wavelengths according to the output alternative routing channels corresponding to the wavelengths, and the server receives the indication of the routing channel selected by the user.
As shown in fig. 6, after the shortest route channel is checked, if there is an alternative route channel of the OCh path that can be created, it needs to be displayed on the client side by a graphical interface, and the server will default to select the shortest route channel of each wavelength. Due to the planning of the network, the user may not select the shortest route channel to create the OCh path, so the optional route channels existing in each wavelength also need to be displayed together for the user to select. In the networking of fig. 4, three shortest route channels exist, and each shortest route channel has two alternative routes. The interface for routing and creation as in fig. 6 will be seen at the final client graphical interface. The shortest routing channel and the alternative routing channel for each of λ 1, λ 2, and λ 3 are shown in FIG. 6 (where the alternative routing channel for λ 3 is also present and is not shown in FIG. 6 by space).
S305, the server correspondingly creates an OCh path of each routing wave channel according to the instruction received in S304.
When the user selects the corresponding routing channels of a plurality of wavelengths on the graphical interface for selecting the routing, the server can create the OCh paths in batches.
Specifically, the process of creating OCh paths in bulk as shown in fig. 8 includes:
s3051, the server records the indication of the routing channel selected by the user for each wavelength.
S3052, the server calculates single-station optical cross of all paths to be created, and sends the calculated single-station optical cross result to the network element equipment for creation.
S3053, the network element equipment creates optical cross according to the calculation result.
After the optical cross is successfully created, the user is also required to set basic attributes of the path, such as a path name, creation time, and the like, for the optical cross, so that an OCh path is created. The attributes such as the path name and the creation time are information in the specific creation, and are not described in detail in this embodiment.
According to the wavelength scheduling method provided by the embodiment of the invention, information such as the shortest route, the optional route channel or the shortest route channel can be obtained from the result obtained by wavelength resource statistics, so that the aim of creating OCh paths in batches can be achieved. The embodiment of the invention can improve the route calculation efficiency when a user configures the wavelength service between two sites, and improve the efficiency and convenience of scheduling optical layer service by an operator to a great extent. The method and the device automatically and quickly calculate the route and select the shortest route reduce the error probability of manual operation, provide alternative routes for users, enable the users to have more choices and further optimize networking. These advantages combine to save labor and maintenance costs for the operator.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
An embodiment of the present invention further provides a wavelength scheduling apparatus, as shown in fig. 9, where the wavelength scheduling apparatus may specifically be a server, and the wavelength scheduling apparatus includes: an acquisition unit 91, a verification unit 92, an output unit 93, and a creation unit 94.
An obtaining unit 91, configured to obtain, according to the inter-site wavelength resource information, at least one routing channel corresponding to a wavelength; a checking unit 92, configured to check whether each routing channel acquired by the acquiring unit 91 can create an optical channel path; an output unit 93, configured to output the alternative routing channel according to the result verified by the verification unit 92; the creating unit 94 is configured to create an optical channel path for a routing channel selected by a user from the alternative routing channels output by the output unit 93.
The obtaining unit 91 obtains the routing channel corresponding to the at least one wavelength at least according to the shortest routing channel and the selectable routing channel of each wavelength between the source site and the destination site. In addition, the alternative routing channels output by the output unit 93 include: the shortest routing channel, and/or the routable channel.
Further, the verification unit 92 in the present embodiment includes: a first determination module 921, and/or a second determination module 922.
A first determining module 921, configured to determine, for any one of the routing channels acquired by the acquiring unit 91, that the routing channel may create an optical channel path for a corresponding wavelength when both a source port and a sink port of the routing channel are connected to a wavelength conversion unit board and a dynamic optical add/drop multiplexer board exists on the routing channel; the second determining module 922 is configured to determine, for any one routing channel acquired by the acquiring unit 91, that the routing channel may create an optical channel path for a corresponding wavelength when the routing channel includes an optical channel path termination point and a dynamic optical add/drop multiplexer board exists on the routing channel.
The output unit 93 specifically includes: the routing channels for which optical channel paths can be created are output as alternative routing channels for each wavelength.
The creating unit 94 in the present embodiment includes: a receiving module 941 and a creating module 942.
A receiving module 941, configured to receive an instruction to create at least one routing channel, where the instruction is selected by the user from alternative routing channels output by the output unit 93; a creating module 942 configured to create a corresponding optical channel path according to the indication received by the receiving module 941.
The wavelength scheduling device of the embodiment of the invention can realize the rapid unified scheduling of the wavelength by referring to the wavelength scheduling method.
Therefore, the alternative route channel, the shortest route or the alternative route can be directly obtained from the wavelength resource statistical result, and whether the shortest route channel can create the OCh path or not can be quickly known through the verification unit. The embodiment of the invention can improve the route calculation efficiency when a user configures the wavelength service between two sites, and improve the efficiency and convenience of scheduling optical layer service by an operator to a great extent. The method and the device automatically and quickly calculate the route and select the shortest route reduce the error probability of manual operation, provide alternative routes for users, enable the users to have more choices and further optimize networking. These advantages combine to save labor and maintenance costs for the operator.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for wavelength scheduling, comprising:
acquiring at least one routing channel corresponding to a wavelength according to the wavelength resource information among the sites;
checking whether the obtained routing channels can create optical channel paths or not;
outputting alternative routing channels according to the checked result;
creating optical channel paths for a plurality of routing channels selected by a user from the alternative routing channels in batch;
the creating optical channel paths for the multiple routing channels selected by the user from the alternative routing channels in batch comprises:
receiving an indication that a user selects from the alternative routing channels to create at least one routing channel;
creating a corresponding optical channel path according to the indication;
said creating a corresponding optical channel path according to said indication further comprises:
recording the indication of the routing channel selected by the user for each wavelength;
calculating single-station optical intersections of all paths to be created;
and sending the calculated single-station optical cross result to network element equipment for creation.
2. The method of claim 1, wherein the inter-site wavelength resource information at least comprises: the shortest routing channel and the selectable routing channel of each wavelength between the source site and the destination site.
3. The method of claim 1, wherein said verifying whether each of said obtained routing channels can create an optical channel path comprises: for any one of the acquired routing channels,
if the source port and the sink port of the routing channel are both connected with a wavelength conversion unit single board and a dynamic optical add-drop multiplexer single board exists on the routing channel, the routing channel can create an optical channel path for the corresponding wavelength; or,
if the routing channel contains an optical channel path termination point and a dynamic optical add-drop multiplexer single board exists on the routing channel, the routing channel can establish an optical channel path for the corresponding wavelength;
the outputting the alternative routing channels according to the checked result includes:
the routing channels for which optical channel paths can be created are output as alternative routing channels for each wavelength.
4. The method of any of claims 1-3, wherein the alternative routing channels comprise: the shortest routing channel, and/or the routable channel.
5. A wavelength scheduling apparatus, comprising:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring at least one routing channel corresponding to a wavelength according to wavelength resource information among sites;
a checking unit, configured to check whether each routing channel acquired by the acquiring unit can create an optical channel path;
the output unit is used for outputting the alternative routing wave channel according to the result verified by the verification unit;
a creating unit, configured to create optical channel paths in batch for multiple routing channels selected by a user from the alternative routing channels;
the creating unit includes:
a receiving module, configured to receive an indication to create at least one routing channel, where the indication is selected by the user from alternative routing channels output by the output unit;
a creating module, configured to create a corresponding optical channel path according to the instruction received by the receiving module;
the device is also used for recording the indication of the routing channel selected by the user for each wavelength, calculating the single-station optical cross of all the paths to be created, and sending the calculated single-station optical cross result to the network element equipment for creation.
6. The apparatus of claim 5, wherein the obtaining unit obtains the routing channel corresponding to the at least one wavelength according to at least a shortest routing channel and an optional routing channel of each wavelength between the source site and the sink site.
7. The apparatus of claim 5, wherein the verification unit comprises:
a first determining module, configured to determine, for any one of the routing channels acquired by the acquiring unit, that the routing channel may create an optical channel path for a corresponding wavelength when a source port and a sink port of the routing channel are both connected to a wavelength conversion unit board and a dynamic optical add/drop multiplexer board exists on the routing channel; and/or the presence of a gas in the gas,
a second determining module, configured to determine, for any one of the routing channels obtained by the obtaining unit, that the routing channel may create an optical channel path for a corresponding wavelength when the routing channel includes an optical channel path termination point and a dynamic optical add/drop multiplexer board exists on the routing channel;
the output unit outputs, as alternative routing channels, routing channels for which optical channel paths can be created, for the respective wavelengths.
8. The apparatus according to any one of claims 5 to 7, wherein the alternative routing channels output by the output unit comprise: the shortest routing channel, and/or the routable channel.
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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 |
| CN106464537B (en) * | 2015-03-19 | 2019-12-13 | 华为技术有限公司 | method and device for allocating channels |
| CN106936534A (en) * | 2015-12-31 | 2017-07-07 | 中兴通讯股份有限公司 | The collocation method and device of wavelength division multiplexer |
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| CN1510851A (en) * | 2002-12-24 | 2004-07-07 | ض� | Method and device for controlling and dispatching data in WDM light switching network |
| CN1929690A (en) * | 2006-09-27 | 2007-03-14 | 华为技术有限公司 | Optical passage establishing method, wavelength-division apparatus and system |
| CN101459468A (en) * | 2007-12-10 | 2009-06-17 | 华为技术有限公司 | Optical layer wavelength end-to-end scheduling method and apparatus |
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| CN1510851A (en) * | 2002-12-24 | 2004-07-07 | ض� | Method and device for controlling and dispatching data in WDM light switching network |
| CN1929690A (en) * | 2006-09-27 | 2007-03-14 | 华为技术有限公司 | Optical passage establishing method, wavelength-division apparatus and system |
| CN101459468A (en) * | 2007-12-10 | 2009-06-17 | 华为技术有限公司 | Optical layer wavelength end-to-end scheduling method and apparatus |
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