CN108462535B - Network element level optical layer cross capacity management method and device - Google Patents
Network element level optical layer cross capacity management method and device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0075—Wavelength grouping or hierarchical aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
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Abstract
The invention discloses a method and a device for managing the cross capacity of a network element level optical layer, belonging to the technical field of communication, wherein the method comprises the following steps: forming an optical layer link according to the changed configuration information; acquiring wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information; the optical layer crossing capacity is stored, the wavelength information of all possible links of the optical layer in the network element is calculated, and the information is stored as a network element level optical layer crossing capacity object, so that the problems of difficult optical layer service management and low system processing efficiency are solved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for managing cross capacity of a network element level optical layer.
Background
Creating an Optical Channel (OCh) path requires obtaining information about the connectivity of the OCh on each network element, i.e., network element level OCh cross capacity information, indicating that an OCh path can pass through from the network element if there is cross capacity at the network element with a specified wavelength and a sufficient spectral width.
Because the network element level OCh crossing capacity is related to the fiber connection configuration in the network element, the network element level OCh crossing capacity is not completely crossed in most scenes, that is, any wavelength of any port can be crossed to any wavelength of any port, so that a completely crossed scheme cannot be used.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for cross capacity management of a network element level optical layer, so as to solve the problems of difficulty in optical layer service management and low system processing efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
according to an aspect of the present invention, there is provided a network element level optical layer cross capacity management method, including:
forming an optical layer link according to the changed configuration information;
acquiring wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information;
preserving the optical layer crossing capability.
Optionally, the forming an optical layer link according to the changed configuration information includes:
and acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board.
Optionally, the source-destination port of the optical layer link is an optical layer end point, an optical multiplexing section end point, or an edge point; the intermediate ports of the optical layer links are all used for transparent transmission of optical layer signals.
Optionally, the obtaining wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information includes:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelengths of each port as the available central wavelength of optical layer intersection capacity; the intersection of the wavelength ranges of each port is taken as the wavelength range of the optical layer intersection capacity.
Optionally, the expression format of the wavelength range is:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be positive integer times of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, and the center wavelength-spectrum width 1/2 can not be less than A;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be greater than B.
According to another aspect of the present invention, there is provided an apparatus for network element level optical layer cross capacity management, comprising:
the optical layer link generation module is used for forming an optical layer link according to the changed configuration information;
the cross capacity calculation module is used for acquiring the wavelength information of each optical layer link and generating optical layer cross capacity according to the wavelength information;
and the cross capacity storage module is used for storing the optical layer cross capacity.
Optionally, the optical layer link generation module includes:
and acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board.
Optionally, the source-destination port of the optical layer link is an optical layer end point, an optical multiplexing section end point, or an edge point; the intermediate ports of the optical layer links are all used for transparent transmission of optical layer signals.
Optionally, the cross capacity calculation module includes:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelength of each port as the available central wavelength of optical layer intersection capacity; the intersection of the wavelength ranges of each port is taken as the wavelength range of the optical layer intersection capacity.
Optionally, the expression format of the wavelength range is:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be a positive integer multiple of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, and the center wavelength-spectrum width 1/2 can not be less than A;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be larger than B.
The embodiment of the invention provides a method and a device for cross capacity management of a network element level optical layer, wherein the method comprises the following steps: forming an optical layer link according to the changed configuration information; acquiring wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information; the optical layer crossing capacity is stored, the wavelength information of all possible links of the optical layer in the network element is calculated, and the information is stored as a network element level optical layer crossing capacity object, so that the problems of difficult optical layer service management and low system processing efficiency are solved.
Drawings
Fig. 1 is a flowchart of a method for cross capacity management of a network element level optical layer according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for managing cross capacity of an optical layer at network element level according to an embodiment of the present invention;
fig. 3 is a block diagram illustrating an exemplary structure of a device for cross capacity management at a network element level optical layer according to a second embodiment of the present invention;
fig. 4 is a block diagram illustrating an exemplary structure of another network element level optical layer cross capacity management apparatus according to a second embodiment of the present 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
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 1, a method for network element level optical layer cross capacity management includes:
s10, forming an optical layer link according to the changed configuration information;
s20, obtaining the wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information;
and S30, storing the optical layer crossing capacity.
In this embodiment, the problems of difficulty in optical layer service management and low system processing efficiency are solved by calculating wavelength information of all possible links in an optical layer in a network element and storing the information as a network element level optical layer cross capacity object.
In this embodiment, the step S10 includes:
and acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer OCh resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board.
In this embodiment, the optical fiber connection configuration includes add-delete optical fiber connections, and for the deleted optical fiber connections, delete their related OCh links and their corresponding cross capacities; and calculating a new OCh link aiming at the newly added optical fiber connection.
In this embodiment, the source and destination ports of the optical layer link are optical layer termination points, optical multiplexing section oms (optical Multiplex section) termination points, or edge points; the intermediate ports of the optical layer links are all used for transmitting optical layer signals transparently, and the finally formed OCh link must be a linear physical port linked list which is arranged from source to sink.
In this embodiment, the definition of the edge point is for a physical port and not for a logical level.
In this embodiment, the configuration information further includes a Wavelength assignment change of a single board of a Wavelength Selective Switch (WSS), where such a change does not affect the OCh link but affects the Wavelength information of the OCh cross capacity, because the OCh link is generated completely according to the relationship between the optical fiber connection and the intra-board cross, and a change in the optical fiber connection necessarily affects the OCh link.
In this embodiment, the step S20 includes:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelengths of each port as the available central wavelength of optical layer intersection capacity; the intersection of the wavelength ranges of each port is taken as the wavelength range of the optical layer intersection capacity.
In this embodiment, the present invention supports management of information of a spectral width (wavelength range), and compared with the current method without management of a spectral width, the present invention supports wavelength management of a flexible grid, that is, supports wavelength multiplexing and demultiplexing management of wavelengths with different spectral widths, and can be used to create an OCh service of a flexible grid.
In this embodiment, the optical layer crossing capability includes:
and link: namely, the ordered physical port list in the network element through which the cross capacity passes;
available wavelength information of the source: consisting of one or more wavelength ranges, each separated by a "number;
available wavelength information of the sink: the expression format is the same as the source end;
whether wavelength variation is allowed: indicating whether the source wavelength and the sink wavelength can be different when passing through the capacity;
other additional information: such as whether it can be used to create protection crossovers, delay information, etc. cross capacity and traffic creation related information.
In this embodiment, the expression format of the wavelength range is:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be a positive integer multiple of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, and the center wavelength-spectrum width 1/2 can not be less than A;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be larger than B.
[]: the parameters within this tag may be absent, and in the absence, the lower limit of the available wavelength range is X-Y1/2; the upper limit of the usable wavelength range is X + Y (n-1/2).
Taking a network element with two ports as an example, the port 1 is of a fixed wavelength, the frequency corresponding to the current available wavelength is 192.1-0.1-3, that is, 3 frequencies with an interval of 0.1 are started from 192.1, and the frequency range is 192.05-193.35 according to the algorithm calculation of the technical scheme; the port 2 is flexible in time slot, the interval is very small, the frequency corresponding to the current available wavelength is 192.100-0.0125-60, namely the interval from 192.100 to 60 frequencies of 0.0125, the frequency range is 192.09375-192.85625 through calculation, the intersection of the two frequencies is 192.1-0.1-3, the intersection of the frequency range is 192.09375-192.85625, the lower limit is the lower limit of the port 2, and the upper limit is the upper limit of the port 1. The usable wavelength and range of the OCh crossover capacity at this time are: 92.1-0.1-3-192.09375-192.85625; in this case, if there are other ports, calculation may be performed by referring to the above algorithm, and the finally calculated wavelength information may be used as the wavelength information of the OCh crossover capacity.
In this embodiment, the wavelength information of the present invention is expressed in a compressed manner, which greatly reduces the data amount and improves the processing efficiency of the system compared with a manner of representing the OCh intersection capacity by a single wave. For example: if a network element has 4 directions, each direction supports 80 waves, if any direction can be communicated with any direction, and the wavelength change is not allowed in the middle, the existing single-wave cross capacity representation mode is used, because links exist between every two directions, 4 × 3/2 ═ 6 links, and 80 × 6 ═ 480 links are provided, and each link has 80 wavelengths; and with the scheme, only 6 capacities are needed because only 6 physical links exist in the network element. If it is assumed that the wavelength is allowed to change in the middle, each existing capacity of the single-wave expression mode needs to be multiplied by 80, then 480 × 80 is 3840 capacities, while the scheme still has 6 capacities, and only the mark needs to be that the wavelength can be changed; therefore, when calculating the available route of the service, the user can judge whether the specified wavelength can pass through a certain network element, without paying attention to the specific fiber connection details in the network element, and directly see whether the cross capacity of the relevant wavelength exists on the network element, if so, the user can pass through the network element, and if not, the user cannot pass through the network element.
As shown in fig. 2, the step S30 is followed by:
and S40, triggering the automatic refreshing of the OCh cross capacity of the network element level aiming at all the configurations influencing the cross capacity in the network element.
Wherein the configuration affecting cross capacity comprises: optical fiber connection configuration, wavelength assignment configuration of a WSS single board, wavelength tuning configuration of a tunable port and the like.
Example two
As shown in fig. 3, in this embodiment, an apparatus for network element level optical layer cross capacity management includes:
an optical layer link generating module 10, configured to form an optical layer link according to the changed configuration information;
a cross capacity calculation module 20, configured to obtain wavelength information of each optical layer link, and generate optical layer cross capacity according to the wavelength information;
and a crossing capacity storage module 30 for storing the optical layer crossing capacity.
In this embodiment, the problems of difficulty in optical layer service management and low system processing efficiency are solved by calculating wavelength information of all possible links in an optical layer in a network element and storing the information as a network element level optical layer cross capacity object.
In this embodiment, the optical layer link generating module includes:
and acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board.
In this embodiment, the optical fiber connection configuration includes add-delete optical fiber connections, and for the deleted optical fiber connections, delete their related OCh links and their corresponding cross capacities; and calculating a new OCh link aiming at the newly added optical fiber connection.
In this embodiment, the source and destination ports of the optical layer link are optical layer termination points, optical multiplexing section oms (optical Multiplex section) termination points, or edge points; the intermediate ports of the optical layer links are all used for transmitting optical layer signals transparently, and the finally formed OCh link must be a linear physical port linked list which is arranged from source to sink.
In this embodiment, the configuration information further includes a Wavelength assignment change of a single Wavelength Selective Switch (WSS) board, where such a change does not affect the OCh link but may affect the OCh cross capacity, because the OCh link is generated completely according to the optical fiber connection and the intra-board cross relationship, and the change of the optical fiber connection necessarily affects the OCh link.
In this embodiment, the crossover capacity calculation module includes:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelengths of each port as the available central wavelength of optical layer intersection capacity; the intersection of the wavelength ranges of each port is taken as the wavelength range of the optical layer intersection capacity.
In this embodiment, the present invention supports management of information of a spectral width (wavelength range), and compared to the current method without management of a spectral width, the present invention supports wavelength management of a flexible grid, that is, supports wavelength multiplexing/demultiplexing management of wavelengths with different spectral widths, and can be used to create an OCh service of a flexible grid.
In this embodiment, the optical layer crossing capability includes:
and link: namely, the ordered physical port list in the network element through which the cross capacity passes;
available wavelength information of the source: consisting of one or more wavelength ranges, each separated by a "number;
available wavelength information of the sink: the expression format is the same as the source end;
whether wavelength variation is allowed: indicating whether the source wavelength and the sink wavelength can be different when passing through the capacity;
other additional information: such as whether it is available to create protection crossovers, delay information, etc. cross capacity and traffic creation related information.
In this embodiment, the expression format of the wavelength range is:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be a positive integer multiple of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, and the center wavelength-spectrum width 1/2 can not be less than A;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be greater than B.
[]: the parameters within this tag may be absent, and in the absence, the lower limit of the available wavelength range is X-Y1/2; the upper limit of the usable wavelength range is X + Y (n-1/2).
Taking a network element with two ports as an example, the port 1 is of a fixed wavelength, the frequency corresponding to the current available wavelength is 192.1-0.1-3, that is, 3 frequencies with an interval of 0.1 are started from 192.1, and the frequency range is 192.05-193.35 according to the algorithm calculation of the technical scheme; the port 2 is flexible in time slot, the interval is very small, the frequency corresponding to the current available wavelength is 192.100-0.0125-60, namely the interval from 192.100 to 60 frequencies of 0.0125, the frequency range is 192.09375-192.85625 through calculation, the intersection of the two frequencies is 192.1-0.1-3, the intersection of the frequency range is 192.09375-192.85625, the lower limit is the lower limit of the port 2, and the upper limit is the upper limit of the port 1. The usable wavelength and range of the OCh crossover capacity at this time are: 92.1-0.1-3-192.09375-192.85625; in this case, if there are other ports, calculation may be performed by referring to the above algorithm, and the finally calculated wavelength information may be used as the wavelength information of the OCh crossover capacity.
In this embodiment, the wavelength information of the present invention is expressed in a compressed manner, which greatly reduces the data amount and improves the processing efficiency of the system compared with a manner of representing the OCh intersection capacity by a single wave. For example: if a network element has 4 directions, each direction supports 80 waves, if any direction can be communicated with any direction, and the wavelength change is not allowed in the middle, the existing single-wave cross capacity representation mode is used, because links exist between every two directions, 4 × 3/2 ═ 6 links, and 80 × 6 ═ 480 links are provided, and each link has 80 wavelengths; and with the scheme, only 6 capacities are needed because only 6 physical links exist in the network element. If it is assumed that the wavelength is allowed to change in the middle, each existing capacity of the single-wave expression mode needs to be multiplied by 80, then 480 × 80 is 3840 capacities, while the scheme still has 6 capacities, and only the mark needs to be that the wavelength can be changed; therefore, when calculating the available route of the service, the user can judge whether the specified wavelength can pass through a certain network element, without paying attention to the specific fiber connection details in the network element, and directly see whether the cross capacity of the relevant wavelength exists on the network element, if so, the user can pass through the network element, and if not, the user cannot pass through the network element.
As shown in fig. 4, the network element level optical layer crossing capacity management apparatus further includes:
and the cross capacity automatic updating control module 40 is used for receiving all configuration changes influencing the OCh cross capacity and automatically triggering related updating calculation.
Wherein the configuration to affect cross capacity comprises: optical fiber connection configuration, wavelength assignment configuration of a WSS single board, wavelength tuning configuration of a tunable port and the like.
It should be noted that the device embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are described in the method embodiment in detail, and technical features in the method embodiment are correspondingly applicable in the device embodiment, which is not described herein again.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. 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 preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.
Claims (6)
1. A network element level optical layer cross capacity management method, comprising:
forming an optical layer link according to the changed configuration information;
acquiring wavelength information of each optical layer link, and generating optical layer cross capacity according to the wavelength information;
preserving the optical layer crossing capability;
the forming an optical layer link according to the changed configuration information includes:
acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board;
the obtaining wavelength information of each optical layer link and generating optical layer cross capacity according to the wavelength information includes:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelength of each port as the available central wavelength of optical layer intersection capacity; the intersection of the wavelength ranges of each port is taken as the wavelength range of the optical layer intersection capacity.
2. The method of claim 1, wherein the source and destination ports of the optical layer link are optical layer end points, optical multiplexing section end points or edge points; the intermediate ports of the optical layer links are all used for transparent transmission of optical layer signals.
3. A method as claimed in claim 2, wherein the wavelength range is expressed in the format of:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be a positive integer multiple of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, the central wavelength-spectral width 1/2 cannot be less than a;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be larger than B.
4. A network element level optical layer cross-capacity management apparatus, comprising:
the optical layer link generation module is used for forming an optical layer link according to the changed configuration information;
the cross capacity calculation module is used for acquiring wavelength information of each optical layer link and generating optical layer cross capacity according to the wavelength information;
the cross capacity storage module is used for storing the optical layer cross capacity;
the optical layer link generation module is configured to:
acquiring all optical layer links in the network element according to the optical fiber connection configuration in the network element, the optical layer resource information on the ports at two ends of the optical fiber connection and the cross connection relationship in the single board;
the cross capacity calculation module is configured to:
acquiring wavelength information of each port on an optical layer link, and taking the intersection of the available central wavelength of each port as the available central wavelength of optical layer intersection capacity; taking the intersection of the wavelength ranges of each port as the wavelength range of the optical layer intersection capacity
5. The apparatus of claim 4, wherein the source and destination ports of the optical layer link are optical layer end points, optical multiplexing section end points or edge points; the intermediate ports of the optical layer links are all used for transparent transmission of optical layer signals.
6. The apparatus of claim 5, wherein the wavelength range is expressed in a format of:
X-Y-n-[A-B]
wherein the content of the first and second substances,
x is the starting center wavelength;
y is the wavelength interval, and the spectral width of the wavelength must be a positive integer multiple of the wavelength interval;
n is the number of wavelengths;
a is the lower limit of the wavelength range, and the center wavelength-spectrum width 1/2 can not be less than A;
b is the upper limit of the wavelength range, and the center wavelength + spectral width 1/2 cannot be larger than B.
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