CN102025615A - Method and device for planning paths of small-granularity services in optical communication network - Google Patents
Method and device for planning paths of small-granularity services in optical communication network Download PDFInfo
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Abstract
The invention provides a method and a device for planning paths of small-granularity services in an optical communication network. The method comprises the following steps of: binding the small-granularity services with identical transmission starting and stopping nodes into one or more virtual services with the transmission rate of not higher than that of a link; finding a plurality of alternative paths corresponding to each virtual service; sequentially calculating the priorities of the corresponding alternative paths according to path weights of the corresponding alternative paths and directional weights of the starting and stopping nodes of the corresponding alternative paths along the directions of the corresponding alternative paths; and selecting the alternative paths with the highest priorities as the routes of the corresponding virtual services. The planning for the small-granularity services in the method and the device can reduce the number of used circuit side single plates to further reduce the construction cost of the whole network in final hardware configuration.
Description
Technical field
The present invention relates to the optical communication field, more particularly, is the method and the device of the medium and small granularity service planning of a kind of optical communication network.
Background technology
In the optical communication network system, professional path is determined jointly by the Wavelength Assignment situation in the route of business on topology and each the jumping route; Promptly when the distribution service path, promptly to choose topological route and choose wavelength again.The selection of this route is referred to as the wavelength route.When optical network plan designed, network node and internodal optical fiber had been formed network topology jointly.
A common optical communication network can be with particular rate (as 10Gbit/s, 40Gbit/s etc.) transmission data, and because client's business demand amount is various, therefore the speed of practical business can be divided into a lot of grades, speed as the GE business is 1GBit/s, the STM(synchronous transfer mode) speed of 16 business is 2.5GBit/s approximately, and the speed of STM64 business is 10GBit/s or the like approximately.If the transmission rate that the speed ratio optical-fiber network of institute's transport service is set is little, be referred to as the small grain size business here.For the small grain size business, in network transmission process, can not dispatch at photosphere at present, need carry out opto-electronic conversion after, dispatch at electricity layer, be referred to as electricity and intersect.
Small grain size business for the identical traffic starting point is arranged gathers together them, forms the bigger business of granularity, is referred to as business-binding.The business of 4 2.5Gbit/s of ordering for example from the A point to Z, can gather together forms the business of 1 10Gbit/s of ordering from the A point to Z; The business of 6 2.5Gbit/s of ordering for example again from the A point to Z, can gather together and form the business of 2 10Gbit/s of ordering from the A point to Z, the business that 4 2.5Gbit/s are wherein arranged in the 1st service channel, fully loaded, article 2, the business that 2 2.5Gbit/s are arranged in, the 2nd service channel also less than.
The optical communication network from the transmission of simple point-to-point transmission develop into recurrent network, loop network, multi-ring networks gradually, until the grid-shaped network.The scale of network topology becomes increasingly complex, and under the also increasing situation of traffic carrying capacity, professional route and wavelength planning just need depended software to carry out.When software plan is professional usually, can carry out the distribution of service path according to channel idle situation (comprising idle optical fiber and wavelength).But carry out under the situation of programming dispatching in the mode that the professional electricity consumption to small grain size intersects, if can plan that success reality need expend the problem of too much hardware cost when carrying out hardware configuration by programme though business can appear in small grain size number of services more at most.
Topological diagram as shown in Figure 1, suppose that the A point is to the business that 2 2.5Gbit/s are arranged between the Z point, if wherein 1 along the transmission of path that A point, B point, Z are ordered, another then when A point configure hardware equipment, can need to be equipped with 2 line side veneers along the path transmission that A point, C point, Z are ordered, correspond respectively to the A point toward B direction and the past C direction of A point, and when carrying out plan of operation with software, this situation is can be recurrent when the small grain size business is more, need expend a large amount of hardware costs.
Summary of the invention
The technical problem to be solved in the present invention provides the method and the device of the medium and small granularity service of a kind of optical communication network planning, with the configuration quantity of the final hardware single board that reduces.
In order to solve the problems of the technologies described above, the invention provides the method for the medium and small granularity service path planning of a kind of optical communication network, comprising:
With the small grain size business-binding of identical traffic start-stop node is one or more virtual services, and the transmission rate of described virtual service is no more than the transmission rate of link;
Find out many alternative paths of each virtual service correspondence;
According to the start-stop node of the path weight value of corresponding alternative path and corresponding alternative path direction weight, calculate the priority of corresponding alternative path successively along this alternative path direction;
Select the route of the high alternative path of priority as the respective virtual business.
Further, said method also has following characteristics: before the step of the priority of the corresponding alternative path of described calculating, also comprise:
Calculate the path weight value of corresponding alternative path;
Calculate the direction weight of the start-stop node of corresponding alternative path respectively along this alternative path direction.
Further, said method also has following characteristics: the step of the path weight value of the corresponding alternative path of described calculating is specially:
According to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process, calculate the path weight value of corresponding alternative path.
Further, said method also has following characteristics: the described start-stop node that calculates corresponding alternative path respectively comprises along the step of the direction weight of this alternative path direction:
If judge respective nodes along existing professional on first link of this alternative path direction, and the residual capacity on described first link then increases the direction weight of respective nodes along this alternative path direction more than or equal to the capacity of corresponding virtual service.
Further, said method also has following characteristics: the step of the priority of the corresponding alternative path of described calculating comprises:
The start-stop node that calculates corresponding alternative path along the direction weight of this alternative path direction and with the ratio of the path weight value of corresponding alternative path, with the priority of this ratio as corresponding alternative path.
In order to address the above problem, the present invention also provides the device of the medium and small granularity service path planning of a kind of optical communication network, comprising:
Binding module, the small grain size business-binding that is used for the identical traffic start node is one or more virtual services, the transmission rate of described virtual service is no more than the transmission rate of link;
Search module, be used to find out many alternative paths of each virtual service correspondence;
Computing module is used for calculating the priority of corresponding alternative path successively according to the start-stop node of the path weight value of corresponding alternative path and the corresponding alternative path direction weight along this alternative path direction;
Select module, be used to select the route of the high alternative path of priority as the respective virtual business.
Further, said apparatus also has following characteristics:
Described computing module also is used to calculate the path weight value of corresponding alternative path, calculates the direction weight of the start-stop node of corresponding alternative path along this alternative path direction respectively.
Further, said apparatus also has following characteristics:
Described computing module specifically is used for calculating the path weight value of corresponding alternative path according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process.
Further, said apparatus also has following characteristics:
Described computing module, specifically be used for if judge that respective nodes is along existing professional on first link of this alternative path direction, and the residual capacity on described first link then increases the direction weight of respective nodes along this alternative path direction more than or equal to the capacity of corresponding virtual service.
Further, said apparatus also has following characteristics:
Described computing module, the start-stop node that specifically is used to calculate corresponding alternative path along the direction weight of this alternative path direction and with the ratio of the path weight value of corresponding alternative path, with the priority of this ratio as corresponding alternative path.
The invention provides the method and the device of the medium and small granularity service planning of a kind of optical communication network, compared with prior art, owing to taked the small grain size business-binding and considered the method for node direction weight, make when final hardware configuration, can reduce the usage quantity of line side veneer, thereby reduce the cost of whole networking.
Description of drawings
Fig. 1 is an optical communication network topology schematic diagram;
Fig. 2 is the schematic representation of apparatus of the medium and small granularity service path planning of optical communication network of the present invention;
Fig. 3 is the flow chart of the method for the medium and small granularity service path planning of optical communication network of the present invention;
Fig. 4 is the flow chart of method of the medium and small granularity service path planning of optical communication network of the embodiment of the invention.
Embodiment
In order to understand the present invention better, the present invention is done to describe further below in conjunction with the drawings and specific embodiments.
Fig. 2 is the schematic representation of apparatus of the medium and small granularity service path planning of optical communication network of the present invention, as shown in Figure 2, the inventive system comprises: binding module, search module, computing module and selection module, wherein,
Binding module, the small grain size business-binding that is used for the identical traffic start node is one or more virtual services;
Search module, be used to find out many alternative paths of each virtual service correspondence;
Computing module is used for calculating the priority of corresponding alternative path successively according to the start-stop node of the path weight value of corresponding alternative path and the corresponding alternative path direction weight along this alternative path direction,
Select module, be used to select the route of the high alternative path of priority as the respective virtual business.
Described computing module also is used to calculate the path weight value of corresponding alternative path, calculates the direction weight of the start-stop node of corresponding alternative path along this alternative path direction respectively.Particularly, be used for calculating the path weight value of corresponding alternative path according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process.If judge that respective nodes is along existing professional on first link of this alternative path direction, and the residual capacity on described first link is more than or equal to the capacity of corresponding virtual service, then increase the direction weight of respective nodes along this alternative path direction, be that direction weight value is that preset initial value adds a unit value, otherwise direction weight value is a preset initial value.
Particularly, the start-stop node that described computing module is used to calculate corresponding alternative path along the direction weight of this alternative path direction and with the ratio of the path weight value of corresponding alternative path, with the priority of this ratio as corresponding alternative path.
Fig. 3 is the flow chart of the method for the medium and small granularity service path planning of optical communication network of the present invention, and as shown in Figure 3, this method comprises following step:
S10, be one or more virtual services with the small grain size business-binding of identical traffic start node;
S20, find out many alternative paths of each virtual service correspondence;
S30, according to the start-stop node of the path weight value of corresponding alternative path and corresponding alternative path direction weight along this alternative path direction, calculate the priority of corresponding alternative path successively;
S40, select the route of the high alternative path of priority as the respective virtual business.
Be elaborated with the method for a specific embodiment below to small grain size service path planning of the present invention.
For example, in the optical communication network system that a transmission rate is 10Gbit/s, have 4 nodes, nodename is respectively: A, B, C, Z; Connection situation in the network topology is: A-B, A-C, B-Z, C-Z, as shown in Figure 1; Need the business of planning to have 3 groups: the 1st group to be the A point have the business of 2 2.5Gbit/s to the C point, and the 2nd group to be the C point have the business of 2 2.5Gbit/s to the Z point, and the 3rd group is the A point has 2 2.5Gbit/s to the Z point business.Fig. 4 is the flow chart of method of the medium and small granularity service path planning of optical communication network of the embodiment of the invention, and as shown in Figure 4, detailed process is as follows:
Wherein the business-binding of 2 2.5Gbit/s in the 1st group of business is 1 virtual service that speed is 5Gbit/s, is called T1; Equally, the 2nd group of business-binding is virtual service T2, and the 3rd group of business-binding is virtual service T3.
Such as node A have B to C to, direction weight DW is set respectively
AB=1, DW
AC=1.
Adopting the jumping figure in path in the present embodiment is that standard is provided with path weight value PW, Path[A-C] only through 1 link (being referred to as 1 jumps), path weight value is expressed as PW[A-C]=1, and Path[A-B-Z-C] passed through 3 links (3 jump), its path weight value is expressed as PW[A-B-Z-C]=3.
These two alternative path Path[A-C for T1] and Path[A-B-Z-C]: Path[A-C] starting point A be initial value 1 along the direction weight of path direction (being that A is to the C direction), use DW
ACRepresent Path[A-C] terminal point C be initial value 1 along the direction weight of path direction (being that C is to the A direction), use DW
CARepresent; Path[A-B-Z-C] starting point A be initial value 1 along the direction weight of path direction (being that A is to the B direction), use DW
ABRepresent Path[A-B-Z-C] terminal point C be initial value 1 along the direction weight of path direction (being that C is to the Z direction), use DW
CZRepresent.
Step 304 for T1, is taken all factors into consideration the direction weight of path weight value and start-stop node, calculates the priority of every alternative path, selects the route of the high alternative path of priority as professional T1;
Formula calculates alternative path priority below using in the present embodiment:
Path priority=(the direction weight of the direction weight+path termination of path starting point)/path weight value.
If Path[A-C] and Path[A-B-Z-C] path priority be expressed as W[A-C respectively], W[A-B-C-Z], utilize above-mentioned formula to get:
W[A-C]=?(DW
AC?+DW
CA?)/PW[A-C]=(1+1)/1=2，
W[A-B-Z-C]=(?DW
AB?+DW
CZ?)/PW[A-B-Z-C]=2/3。
Select alternative path Path[A-C at last] as the route of professional T1.
Step 305 is in like manner planned T2, and the alternative path of finding out T2 is Path[C-Z] and Path[C-A-B-Z].
These two alternative path Path[C-Z for T2] and Path[C-A-B-Z]: Path[C-Z] starting point C be initial value 1 along the direction weight of path direction (being that C is to the Z direction), use DW
CZRepresent Path[C-Z] terminal point Z be initial value 1 along the direction weight of path direction (being that Z is to the C direction), use DW
ZCRepresent; Path[C-A-B-Z] starting point C be initial value 1 along the direction weight of path direction (being that C is to the A direction), but T1 passes by on this direction before, and the remaining capacity of this direction is 5GBit/s, is not less than the service rate of T2, therefore the weight of this direction increases, DW
CA=2, Path[C-A-B-Z] terminal point Z be initial value 1 along the direction weight of path direction (being that Z is to the B direction), use DW
CZRepresent.
W[C-Z]=?(DW
CZ?+DW
ZC?)/PW[C-Z]＝(1+1)/1=2；W[C-A-B-Z]=?(DW
CA?+DW
ZB?)/PW[C-A-B-Z]=(2+1)/3=1。Relatively the priority of alternative path is selected path P ath[C-Z at last] as the route of professional T2.
Step 309 is planned T3 at last, and the alternative path of finding out T3 is: Path[A-B-Z] and Path[A-C-Z].
Alternative path Path[A-B-Z for T3] and Path[A-C-Z]: Path[A-B-Z] starting point A be initial value 1 along the direction weight of path direction (being that A is to the B direction), use DW
ABRepresent Path[A-B-Z] terminal point Z be initial value 1 along the direction weight of path direction (being that Z is to the B direction), use DW
ZBRepresent; Path[A-C-Z] starting point A be initial value 1 along the direction weight of path direction (being that A is to the C direction), but T1 passes by on this direction before, and the remaining capacity of this direction is 5GBit/s, be not less than the service rate of T3, so the weight of this direction increases DW
AC=2, Path[A-C-Z] terminal point Z be initial value 1 along the direction weight of path direction (being that Z is to the C direction), but T2 passes by on this direction before, and the remaining capacity of this direction is 5GBit/s, be not less than the service rate of T3, so the weight of this direction increases DW
ZC=2.
W[A-B-Z]=?(DWAB?+DWZB?)/PW[A-B-Z]＝(1+1)/2=1；
W[A-C-Z]=?(DWAC?+DWZC?)/PW[A-C-Z]=(2+2)/2=2。
Relatively the priority of alternative path is selected path P ath[A-C-Z at last] as the route of professional T3.
Step 400 after 3 plans of operation are finished, is carried out the node device configuration.Because node A has two business (T1 and T3) in the C direction, the path P ath[A-C that can select in node A and node C upper edge] direction on 1 hardware single board respectively be set get final product; Node Z also has two business (T2 and T3) in the C direction, the path P ath[A-C-Z that can select in node Z and node C upper edge] direction on 1 hardware single board respectively be set get final product, after the whole system configuration is finished like this, can save 1 hardware single board respectively at node A and node Z.
Under the bigger situation of more complicated network topology and traffic carrying capacity, use method described in the invention can reduce the configuration quantity of veneer in a large number, thereby reduce the construction cost of whole network.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Below only be the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the method for the medium and small granularity service path planning of optical communication network comprises:
With the small grain size business-binding of identical traffic start-stop node is one or more virtual services, and the transmission rate of described virtual service is no more than the transmission rate of link;
Find out many alternative paths of each virtual service correspondence;
According to the start-stop node of the path weight value of corresponding alternative path and corresponding alternative path direction weight, calculate the priority of corresponding alternative path successively along this alternative path direction;
Select the route of the high alternative path of priority as the respective virtual business.
2. method according to claim 1 is characterized in that: before the step of the priority of the corresponding alternative path of described calculating, also comprise:
Calculate the path weight value of corresponding alternative path;
Calculate the direction weight of the start-stop node of corresponding alternative path respectively along this alternative path direction.
3. as method as described in the claim 2, it is characterized in that: the step of the path weight value of the corresponding alternative path of described calculating is specially:
According to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process, calculate the path weight value of corresponding alternative path.
4. as method as described in the claim 2, it is characterized in that: the described start-stop node that calculates corresponding alternative path respectively comprises along the step of the direction weight of this alternative path direction:
If judge respective nodes along existing professional on first link of this alternative path direction, and the residual capacity on described first link then increases the direction weight of respective nodes along this alternative path direction more than or equal to the capacity of corresponding virtual service.
5. as claim 1-4 method as described in each, it is characterized in that: the step of the priority of the corresponding alternative path of described calculating comprises:
The start-stop node that calculates corresponding alternative path along the direction weight of this alternative path direction and with the ratio of the path weight value of corresponding alternative path, with the priority of this ratio as corresponding alternative path.
6. the device of the medium and small granularity service path planning of optical communication network comprises:
Binding module, the small grain size business-binding that is used for the identical traffic start node is one or more virtual services, the transmission rate of described virtual service is no more than the transmission rate of link;
Search module, be used to find out many alternative paths of each virtual service correspondence;
Computing module is used for calculating the priority of corresponding alternative path successively according to the start-stop node of the path weight value of corresponding alternative path and the corresponding alternative path direction weight along this alternative path direction;
Select module, be used to select the route of the high alternative path of priority as the respective virtual business.
7. as device as described in the claim 6, it is characterized in that:
Described computing module also is used to calculate the path weight value of corresponding alternative path, calculates the direction weight of the start-stop node of corresponding alternative path along this alternative path direction respectively.
8. as device as described in the claim 7, it is characterized in that:
Described computing module specifically is used for calculating the path weight value of corresponding alternative path according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process.
9. as device as described in the claim 7, it is characterized in that:
Described computing module, specifically be used for if judge that respective nodes is along existing professional on first link of this alternative path direction, and the residual capacity on described first link then increases the direction weight of respective nodes along this alternative path direction more than or equal to the capacity of corresponding virtual service.
10. as claim 6-9 device as described in each, it is characterized in that:
Described computing module, the start-stop node that specifically is used to calculate corresponding alternative path along the direction weight of this alternative path direction and with the ratio of the path weight value of corresponding alternative path, with the priority of this ratio as corresponding alternative path.
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| CN102025615B (en) | 2015-06-10 |
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