CN104796217B - A kind of Wavelength allocation method and equipment of optical transport network - Google Patents
A kind of Wavelength allocation method and equipment of optical transport network Download PDFInfo
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Abstract
The embodiment of the present invention provides the Wavelength allocation method and equipment of a kind of optical transport network, it is related to optical transport network transmission field, while distributing wavelength for network service, it can be that network service distributes wavelength according to the requirement of the network service of different priorities, can satisfy requirement of the Very Important Person to business service quality.The specific scheme is that obtaining the transmission path of pending network service first, then the business number that the link that bearer service is most in transmission path is carried is obtained, business number number of wavelengths threshold value corresponding with the priority of pending network service is compared again, if business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, wavelength available is then searched in the link of transmission path, and the wavelength available found is distributed into pending network service.The present invention is used for the Wavelength Assignment of optical transport network.
Description
Technical field
The present invention relates to optical transport network transmission field more particularly to a kind of Wavelength allocation method of optical transport network and set
It is standby.
Background technique
It in optical transfer network (Optical Transport Network, OTN), is transmitted using different wave length as data
Channel, network pass through establishes between a source node and a destination node optical channel realize data transmission, according to Internet resources
Configuring condition is that optical channel calculates path and distributes wavelength.
In existing optical transport network, the method for wavelength resource distribution is largely using static allocation method, i.e. institute
Connection request between node pair is previously given and do not change over time, i.e. the connection relationship of source node and destination node
It gives constant.After all connections establish, connection will be remained unchanged, and network will not establish new connection, will not tear open
Except the connection built up.When there is service request, according to certain algorithm be one wavelength available of the traffic assignments, then according to
Given path (connection relationship given between source node and destination node) transmission data.But the wavelength of the prior art provides
Source distribution method cannot need to distribute wavelength for it according to the business of different priorities, be not able to satisfy Very Important Person and take to business
The requirement for quality of being engaged in.
Summary of the invention
The embodiment of the present invention provides the Wavelength allocation method and equipment of a kind of optical transport network, distributes wave for network service
While long, it can be that network service distributes wavelength according to the requirement of the network service of different priorities, can satisfy important visitor
Requirement of the family to business service quality.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, providing a kind of Wavelength allocation method of optical transport network, which comprises
Obtain the transmission path of pending network service；Wherein, the transmission path is used for transmission the pending network
Business；
Obtain the business number that the link that bearer service is most in the transmission path is carried；
Business number number of wavelengths threshold value corresponding with the priority of the pending network service is compared；
If the business number is less than the corresponding number of wavelengths threshold value of priority of the pending network service, described
Wavelength available is searched in the link of transmission path, and the wavelength available found is distributed into the pending network service.
Second aspect also provides a kind of Wavelength allocation method of optical transport network, which comprises
The wavelength of optical link is divided into multiple wavelength groups according to the priority of network service；Wherein, different priorities are corresponding
Different wave length group；
Wavelength available is searched in corresponding wavelength group according to the priority of pending network service, and can by what is found
The pending network service is given with Wavelength Assignment, the pending network service is any one net in the network service
Network business.
The third aspect, provides a kind of Wavelength Assignment equipment, and the equipment includes:
Path unit, for obtaining the transmission path of pending network service；Wherein, the transmission path is used for transmission institute
State pending network service；
Acquiring unit, the business number carried for obtaining the link that bearer service is most in the transmission path；
Comparing unit, for by business number number of wavelengths thresholding corresponding with the priority of the pending network service
Value is compared；
Allocation unit, if being less than the corresponding number of wavelengths door of priority of the pending network service for the business number
Limit value, then search wavelength available in the link of the transmission path, and the wavelength available found is distributed to described wait hold
Row network service.
Fourth aspect, also provides a kind of Wavelength Assignment equipment, and the equipment includes:
Grouped element, for the wavelength of optical link to be divided into multiple wavelength groups according to the priority of network service；Wherein, no
Same priority corresponds to different wave length group；
Allocation unit, for searching wavelength available in corresponding wavelength group according to the priority of pending network service,
And the wavelength available found is distributed into the pending network service, the pending network service is the network service
In any one network service.
The embodiment of the present invention provides the Wavelength allocation method and equipment of a kind of optical transport network, obtains pending net first
The transmission path of network business, wherein the transmission path is used for transmission the pending network service, then obtains the transmission
The business number that the most link of bearer service is carried on path, then by the excellent of the business number and the pending network service
The corresponding number of wavelengths threshold value of first grade is compared, if the priority that the business number is less than the pending network service is corresponding
Number of wavelengths threshold value, then search wavelength available in the link of the transmission path, and the wavelength available found is distributed
To the pending network service；Alternatively, the wavelength of optical link is divided into multiple wavelength according to the priority of network service first
Group, wherein different priorities correspond to different wave length group, then according to the priority of pending network service in corresponding wavelength group
Middle lookup wavelength available, and the wavelength available found is distributed into the pending network service, the pending network industry
Business is any one network service in the network service.In this way, while distributing wavelength for network service, it can be according to not
The requirement of the network service of same priority is that network service distributes wavelength, can satisfy Very Important Person and wants to business service quality
It asks.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram one of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 2 is a kind of flow diagram two of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 3 is a kind of flow diagram three of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 4 is a kind of flow diagram four of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 5 is a kind of analogous diagram one of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 6 is a kind of analogous diagram two of the Wavelength allocation method for optical transport network that the embodiment of the present invention provides；
Fig. 7 is a kind of structural schematic diagram for Wavelength Assignment equipment that the embodiment of the present invention provides；
Fig. 8 is the structural schematic diagram one for another Wavelength Assignment equipment that the embodiment of the present invention provides；
Fig. 9 is the structural schematic diagram two for another Wavelength Assignment equipment that the embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The Wavelength allocation method for a kind of optical transport network that the embodiment of the present invention provides, as shown in Figure 1, this method packet
It includes:
101, the transmission path of pending network service is obtained.
Wherein, which is used for transmission pending network service.
102, the business number that the link that bearer service is most in transmission path is carried is obtained.
103, business number number of wavelengths threshold value corresponding with the priority of pending network service is compared.
If 104, business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, in transmission path
Link in search wavelength available, and the wavelength available found is distributed into pending network service.
The embodiment of the present invention also provides a kind of Wavelength allocation method of optical transport network, as shown in Fig. 2, this method packet
It includes:
201, the wavelength of optical link is divided by multiple wavelength groups according to the priority of network service.
Wherein, different priorities correspond to different wave length group, include at least one wavelength in wavelength group.
202, wavelength available is searched in corresponding wavelength group according to the priority of pending network service, and will found
Wavelength available distribute to pending network service, pending network service is any one network service in network service.
The embodiment of the present invention provides a kind of Wavelength allocation method of optical transport network, obtains pending network service first
Transmission path, wherein transmission path is used for transmission pending network service, then obtain transmission path on bearer service it is most
The business number that is carried of link, then business number number of wavelengths threshold value corresponding with the priority of pending network service is carried out
Compare, if business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, in the link of transmission path
Middle lookup wavelength available, and the wavelength available found is distributed into pending network service；Alternatively, first according to network service
Priority the wavelength of optical link is divided into multiple wavelength groups, wherein different priorities correspond to different wave length group, then according to
The priority for executing network service searches wavelength available in corresponding wavelength group, and by the wavelength available found distribute to
Network service is executed, pending network service is any one network service in network service.In this way, being distributed for network service
While wavelength, it can be that network service distributes wavelength according to the requirement of the network service of different priorities, can satisfy important
Requirement of the client to business service quality.
In order to enable those skilled in the art to be more clearly understood that technical solution provided in an embodiment of the present invention, lead to below
Specific embodiment is crossed, the Wavelength allocation method for the first optical transport network that the embodiment of the present invention provides is carried out specifically
It is bright, as shown in figure 3, this method comprises:
301, the transmission path of pending network service is obtained.
Specifically, obtaining the source node and destination node of pending network service；
The shortest path between source node and destination node is obtained according to Dijkstra's algorithm, using shortest path as biography
Defeated path.
Illustratively, it is assumed that the source node of pending network service is A, destination node E, according to Dijkstra's algorithm
The shortest path calculated between source node A and destination node E is A-B-C-D-E, wherein B, C, D are intermediate node, A-B, B-
C, C-D, D-E are the link for forming the path.
302, the business number that the link that bearer service is most in transmission path is carried is obtained.
Illustratively, the business number in optical transport network by being carried in Link Resource Manager module record each of the links
Amount, after determining transmission path, the Link Resource Manager module for inquiring all links in the transmission path obtains holds in each of the links
The business number of load, to obtain the business number that the link that bearer service is most in the transmission path is carried.
303, business number number of wavelengths threshold value corresponding with the priority of pending network service is compared.
Illustratively, different priority is divided to network service, can be divided according to the significance level of client traffic,
Such as the priority of government services is the first priority, the priority of large enterprise's business is the second priority, small business's industry
The priority of business is third priority, and the priority of personal business is the 4th priority etc., can also there is other division mode,
It only illustrates herein.Different number of wavelengths threshold values is arranged in the different priorities of corresponding network business, can be excellent according to business
Its higher corresponding number of wavelengths threshold value of first grade bigger principle is arranged, and number of wavelengths threshold value is less than or equal to optical link
Number of wavelengths.For example, a total of 30 wavelength in optical link, the corresponding number of wavelengths threshold value of the first priority is set as 30,
The corresponding number of wavelengths threshold value of two priority is set as 25, and the corresponding number of wavelengths threshold value of third priority is set as the 20, the 4th
The corresponding number of wavelengths threshold value of priority is set as 15 etc..
304, the corresponding number of wavelengths threshold value of priority whether the business number is less than pending network service judged.
If 305, the business number is greater than the corresponding number of wavelengths threshold value of priority of pending network service, block wait hold
Row network service.
Illustratively, it is assumed that the business for the chain road carrying that bearer service is most in the transmission path of pending network service
Number is 19, and the corresponding number of wavelengths threshold value of the priority of pending network service is 15, then just blocking pending task.
It should be noted that the corresponding number of wavelengths threshold value restriction of the priority of pending network service is pending net
The number of each link bearer traffic of the transmission path of network business, the corresponding business of an actually wavelength, each of the links
The business number that can at most carry is equal with wavelength sum, but this programme provided according to the present invention, if pending
The business number for the chain road carrying that bearer service is most in each link of the transmission path of network service is greater than pending network
When the corresponding number of wavelengths threshold value of the priority of business, just wavelength available is not searched for pending network service, directly blocks this
Task.
If 306, business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, in transmission path
Link in search wavelength available.
Illustratively, it is assumed that the business for the chain road carrying that bearer service is most in the transmission path of pending network service
Number is 20, and the corresponding number of wavelengths threshold value of the priority of pending network service is 25, then looks into the link of the transmission path
Whether look for has wavelength available.
307, judge available wavelength whether is found in the link of the transmission path.
If 308, not finding available wavelength in the link of the transmission path, block pending network service.
Illustratively, available wavelength is searched in each of the links on the transmit path, if wherein a link carrying
Business number be equal to link number of wavelengths, then the link does not have wavelength available, then can not for pending network service distribution can
Then block the business with wavelength.
If 309, finding available wavelength in the link of the transmission path, wavelength is distributed for pending network service.
Illustratively, available wavelength is searched in each of the links on the transmit path, it can if had in each of the links
With wavelength, according to initial hit FF(First Fit) algorithm is that pending network service distributes a wavelength available.
310, pending network service is passed through into the transmission path.
Below by specific embodiment, to the Wavelength Assignment for second of optical transport network that the embodiment of the present invention provides
Method is described in detail, as shown in figure 4, this method comprises:
401, the wavelength of optical link is divided by multiple wavelength groups according to the priority of network service.
Illustratively,
Different priority is divided to network service, can be divided according to the significance level of client traffic, such as government
The priority of business is the first priority, and the priority of large enterprise's business is the second priority, small business's business it is preferential
Grade is third priority, and the priority of personal business is the 4th priority etc., can also have other division mode, only show herein
Example explanation.
Whole wavelength of optical link are divided into multiple wavelength groups according to the priority of network service, it can be using continuous grouping
Or the mode of discrete packets is grouped whole wavelength, wherein continuous grouping refers to: numbering to whole wavelength, in order
It all include a wavelength number upper limit and wavelength in each wavelength group by different Wavelength Assignments into different wavelength groups
Number lower limit；Discrete packets refer to: several wavelength of random selection are divided into one group.
The different priorities of network service correspond to different wavelength groups, the wavelength in the corresponding wavelength group of different priority
Number can according to need setting.For example, in the optical transport network of an a large amount of carrying low priority traffices, it should improve low excellent
The number of wavelengths that the corresponding wavelength group of first grade includes.
402, wavelength available is searched in corresponding wavelength group according to the priority of pending network service.
Illustratively, it is assumed that the service priority of pending network is the second priority, the corresponding wavelength of the second priority
10 different wavelength in group then search the wavelength that can be used in 10 wavelength.
403, judge whether to find wavelength available.
If 404, not finding wavelength available, block pending network service.
Illustratively, if all wavelengths in the corresponding wavelength group of the priority of pending network service have been assigned
Other network services are given, no wavelength available can distribute to pending network service and then block pending network service.
If 405, finding wavelength available, wavelength is distributed for pending network service.
Illustratively, if having wavelength available in the corresponding wavelength group of priority of pending network service, according to head
Secondary hit FF(First Fit) algorithm be pending network service distribute a wavelength available.
406, the transmission path of pending network service is obtained.
Specifically, obtaining the source node and destination node of pending network service；
The shortest path between source node and destination node is obtained according to Dijkstra's algorithm, using shortest path as biography
Defeated path.
Illustratively, it is assumed that the source node of pending network service is A, destination node E, according to Dijkstra's algorithm
The shortest path calculated between source node A and destination node E is A-B-C-D-E, wherein B, C, D are intermediate node, A-B, B-
C, C-D, D-E are the link for forming the path.
407, pending network service is passed through into the transmission path.
It is being discussed in detail to the Wavelength allocation method of two kinds of optical transport networks provided in an embodiment of the present invention above.From upper
Two schemes in face can be seen that in the Wavelength allocation method of second of optical transport network, and the business of each priority is only
Fixed some wavelength resources can be used the business lower than oneself priority can not to be used to be used even if priority is very high
Wavelength resource.In the Wavelength allocation method of the first optical-fiber network, the number of wavelengths that the business of high priority can be used is more than
The number of wavelengths that low priority can be used, the business for thus well ensuring high priority are not easy to be blocked, but simultaneously, by
It is not sufficiently ensured in the business of low priority, the blocking rate that will lead to whole network is relatively high.In real network,
Different methods can be used according to different situations.
In the following, to the embodiment of the present invention provide two kinds of optical transport networks Wavelength allocation method in 14 nodes
NSFNET(National Science Foundation establish a core network be used for network simulation) on emulated, assume in emulation
Poisson distribution is obeyed in the arrival of business, and the duration of business obeys quantum condition entropy, it is assumed that network is a single fiber network, often
Contain 80 wavelength on optical fiber.It is assumed that there are the network services of three priority in network.For simplicity, by the first
The Wavelength allocation method of optical transport network is referred to as first method, referred to as by the Wavelength allocation method of second of optical transport network
For second method.
In this emulation, defining network profit loss is
Wherein, l represents the number of service priority, and Vi represents priority as the value of the business of i, Pi represent priority as
The number that the business of i is blocked, Ni represent priority as total number of the business of i.It can see in from the equations above, net
A possibility that loss in revenue of network is smaller, and the higher business of priority is assigned resource is bigger.
(1) influence that business proportion different in two methods loses network profit is compared.
In this emulation, the value ratio of three service priority is set as 1:5:10, traffic intensity is 180 Ai Er
It is blue.
It can be seen that, in the second approach, need to set difference from the introduction in specific embodiment to two methods
Number of wavelengths corresponding to service priority needs to set wavelength corresponding to different business priority in the first method
Number threshold value.It is obvious that influence of the different business proportions to the loss in revenue of last network is different, therefore, Fig. 5 is exactly
It is lost and the relationship of different business proportions by largely emulating the network profit that data obtain.
In fig. 5 it may be seen that for second method, when the business proportion of highest priority is about 56.25%
When, the loss in revenue of network is minimum.And for first method, when the threshold value of highest priority is set as wavelength sum
When 90%, the loss in revenue of network is minimum, and therefore, parameter corresponding to loss in revenue minimum value is different in two methods, because
This can use different methods in practice for different situations.
(2) influence that value ratio different in two methods loses network profit is compared.
In this emulation, it is assumed that the value of lowest priority business is 1, and the value of highest priority traffic is 10, in
Between the value of priority service be β (1 < β < 10), the value ratios of three kinds of service priority is 1: β: 10, and traffic intensity is 180 love
You are blue.
Other than business proportion different in two methods has an impact to network profit loss, different business priority institute
Corresponding value ratio also has bigger influence to the loss in revenue of network, and definition is corresponding when network profit loss is minimum
That service with different priority levels value ratio be value at best ratio.Fig. 6 is the value ratio and net for setting different business priority
The relationship of network loss in revenue.
It will be seen from figure 6 that in the second approach, with the increase of β value, the loss in revenue of network also becomes more next
It is bigger, and in the first method, the loss in revenue of network but becomes smaller and smaller, it can be seen that, works as net from this emulation
When low priority traffice present in network is more, the economic performance of network can be improved using second method, and if net
It, can be more preferable using the effect of first method when high-priority service is more in network.
By emulation above it is known that in practice, can be used second when the business of low priority is more
The Wavelength allocation method of optical transport network.When the business of middle high priority is more, the wave of the first optical transport network is used
Long distribution method.
The Wavelength allocation method for the first optical transport network that the embodiment of the present invention provides, obtains pending network first
The transmission path of business, wherein transmission path is used for transmission pending network service, then obtains bearer service in transmission path
The business number that most links is carried, then by business number number of wavelengths threshold value corresponding with the priority of pending network service
It is compared, if business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, in transmission path
Wavelength available is searched in link, and the wavelength available found is distributed into pending network service.The embodiment of the present invention is also
The Wavelength allocation method of second of optical transport network is provided, is first divided into the wavelength of optical link according to the priority of network service
Multiple wavelength groups, wherein different priorities correspond to different wave length group, then according to the priority of pending network service in correspondence
Wavelength group in search wavelength available, and the wavelength available found is distributed into pending network service, pending network industry
Business is any one network service in network service.In this way, while distributing wavelength for network service, it can be in low priority
Business it is more when, use the Wavelength allocation method of second of optical transport network；When the business of middle high priority is more,
Use the Wavelength allocation method of the first optical transport network；It can be network industry according to the requirement of the network service of different priorities
Business distribution wavelength, can satisfy requirement of the Very Important Person to business service quality.
The embodiment of the present invention provides a kind of Wavelength Assignment equipment 70, as shown in fig. 7, the equipment 70 includes:
Path unit 71, for obtaining the transmission path of pending network service；
Wherein, transmission path is used for transmission pending network service；
Acquiring unit 72, the business number carried for obtaining the most link of bearer service in transmission path；
Comparing unit 73, for carrying out business number number of wavelengths threshold value corresponding with the priority of pending network service
Compare；
Specifically, the corresponding number of wavelengths threshold value of the priority of network service is set previously according to the priority of network service
It sets；Wherein, different priorities correspond to different number of wavelengths threshold values, and number of wavelengths threshold value is less than or equal to the wavelength of optical link
Number, pending network service are any one network service in network service.
Allocation unit 74, if being less than the corresponding number of wavelengths threshold value of priority of pending network service for business number,
Wavelength available is then searched in the link of transmission path, and the wavelength available found is distributed into pending network service.
Optionally, path unit 71 is specifically used for:
Obtain the source node and destination node of pending network service；
The shortest path between source node and destination node is obtained according to Dijkstra's algorithm, using shortest path as biography
Defeated path.
The embodiment of the present invention provides a kind of Wavelength Assignment equipment, obtains the transmission path of pending network service first,
Wherein, transmission path is used for transmission pending network service, then obtains the link that bearer service is most in transmission path and is held
The business number of load, then business number number of wavelengths threshold value corresponding with the priority of pending network service is compared, if industry
Business number is less than the corresponding number of wavelengths threshold value of priority of pending network service, then searches in the link of transmission path available
Wavelength, and the wavelength available found is distributed into pending network service.In this way, while distributing wavelength for network service,
It can be that network service distributes wavelength according to the requirement of the network service of different priorities, can satisfy Very Important Person and business is taken
The requirement for quality of being engaged in.
The embodiment of the present invention also provides a kind of Wavelength Assignment equipment 80, as shown in figure 8, the equipment 80 includes:
Grouped element 81, for the wavelength of optical link to be divided into multiple wavelength groups according to the priority of network service；Wherein,
Different priorities correspond to different wave length group；
Allocation unit 82, wave can be used by searching in corresponding wavelength group for the priority according to pending network service
It is long, and the wavelength available found is distributed into pending network service, pending network service is any in network service
One network service.
Optionally, as shown in figure 9, the equipment 80 further include:
Path unit 83, for obtaining the transmission path of pending network service；
Wherein, transmission path is used for transmission pending network service.
Optionally, path unit 83 is specifically used for:
Obtain the source node and destination node of pending network service；
The shortest path between source node and destination node is obtained according to Dijkstra's algorithm, using shortest path as biography
Defeated path.
The embodiment of the present invention provides a kind of Wavelength Assignment equipment, first according to the priority of network service by optical link
Wavelength is divided into multiple wavelength groups, wherein different priorities correspond to different wave length group, then according to the preferential of pending network service
Grade searches wavelength available in corresponding wavelength group, and the wavelength available found is distributed to pending network service, wait hold
Row network service is any one network service in network service.In this way, while distributing wavelength for network service, Neng Gougen
Requirement according to the network service of different priorities is that network service distributes wavelength, can satisfy Very Important Person to business service quality
Requirement.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that the independent physics of each unit includes, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the portion of each embodiment the method for the present invention
Step by step.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic or disk etc. are various can store
The medium of program code.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of Wavelength allocation method of optical transport network characterized by comprising
Obtain the transmission path of pending network service；Wherein, the transmission path is used for transmission the pending network service；
Obtain the business number that the link that bearer service is most in the transmission path is carried；
Business number number of wavelengths threshold value corresponding with the priority of the pending network service is compared；
If the business number is less than the corresponding number of wavelengths threshold value of priority of the pending network service, in the transmission
Wavelength available is searched in the link in path, and the wavelength available found is distributed into the pending network service；
If the business number is greater than the corresponding number of wavelengths threshold value of priority of the pending network service, obstruction it is described to
Execute network service.
2. the method according to claim 1, wherein the corresponding number of wavelengths threshold value of the priority of network service is
It is arranged previously according to the priority of the network service；Wherein, different priorities correspond to different number of wavelengths threshold values, described
Number of wavelengths threshold value is less than or equal to the number of wavelengths of optical link, and the pending network service is any in the network service
One network service.
3. according to the method described in claim 2, it is characterized in that, the transmission path packet for obtaining pending network service
It includes:
Obtain the source node and destination node of the pending network service；
The shortest path between the source node and the destination node is obtained according to Dijkstra's algorithm, by the shortest path
Diameter is as the transmission path.
4. a kind of Wavelength Assignment equipment characterized by comprising
Path unit, for obtaining the transmission path of pending network service；Wherein, the transmission path be used for transmission it is described to
Execute network service；
Acquiring unit, the business number carried for obtaining the link that bearer service is most in the transmission path；
Comparing unit, for by business number number of wavelengths threshold value corresponding with the priority of the pending network service into
Row compares；
Allocation unit, if being less than the corresponding number of wavelengths thresholding of priority of the pending network service for the business number
Value, then search wavelength available in the link of the transmission path, and the wavelength available found is distributed to described pending
Network service.
5. equipment according to claim 4, which is characterized in that the corresponding number of wavelengths threshold value of the priority of network service is
It is arranged previously according to the priority of the network service；Wherein, different priorities correspond to different number of wavelengths threshold values, described
Number of wavelengths threshold value is less than or equal to the number of wavelengths of optical link, and the pending network service is any in the network service
One network service.
6. equipment according to claim 4, which is characterized in that the path unit is specifically used for:
Obtain the source node and destination node of the pending network service；
The shortest path between the source node and the destination node is obtained according to Dijkstra's algorithm, by the shortest path
Diameter is as the transmission path.
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| CN101056475A (en) * | 2007-06-01 | 2007-10-17 | 清华大学 | A wave length buffer method capable of effectively reducing the blockage rate of the wave-length routing optical network |
| CN102638404A (en) * | 2012-04-09 | 2012-08-15 | 南京邮电大学 | Optical network protection resource allocation method based on service differentiation |
| CN102710362A (en) * | 2012-06-19 | 2012-10-03 | 南京邮电大学 | Allocation method for downlink wavelength in shared multi-wavelength WDM-PON |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101056475A (en) * | 2007-06-01 | 2007-10-17 | 清华大学 | A wave length buffer method capable of effectively reducing the blockage rate of the wave-length routing optical network |
| CN102638404A (en) * | 2012-04-09 | 2012-08-15 | 南京邮电大学 | Optical network protection resource allocation method based on service differentiation |
| CN102710362A (en) * | 2012-06-19 | 2012-10-03 | 南京邮电大学 | Allocation method for downlink wavelength in shared multi-wavelength WDM-PON |
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