CN102025615B - 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 optical communication field, more particularly, is method and the device of a kind of paths of small-granularity services in optical communication network planning.
Background technology
In optical communication network system, the path of business is determined jointly by the route of business in topology and the Wavelength Assignment situation in each jumping route; Namely, when distribution service path, namely to choose topology and choose wavelength again.The selection of this route is referred to as Wavelength routing.When optical network plan designs, network node and internodal optical fiber constitute network topology jointly.
A usual optical communication network can with specific speed (as 10Gbit/s, 40Gbit/s etc.) transmission data, and due to the business demand amount of client various, therefore the speed of practical business can be divided into a lot of grade, speed as GE business is 1GBit/s, STM(synchronous transfer mode) speed of 16 business be about the speed of 2.5GBit/s, STM64 business is about 10GBit/s etc.If the transmission rate of the speed ratio optical-fiber network setting of institute's transport service is little, be referred to as small grain size business here.For small grain size business, can not dispatch at photosphere at present in network transmission process, after needing to carry out opto-electronic conversion, dispatch in electric layer, be referred to as electricity and intersect.
For the small grain size business having identical traffic starting point, they are gathered together, form the business that granularity is larger, be referred to as business-binding.Such as 4 from A point to the business of the 2.5Gbit/s of Z point, the formation 1 that can gather together is from A point to the business of the 10Gbit/s of Z point; Such as 6 from A point to the business of the 2.5Gbit/s of Z point again, formation 2 can be gathered together from A point to the business of the 10Gbit/s of Z point, wherein there is the business of 4 articles of 2.5Gbit/s in the 1st article of service channel, be fully loaded with, article 2, in, have the business of 2 articles of 2.5Gbit/s, the 2nd article of service channel also less than.
Recurrent network, loop network, multi-ring networks is developed into gradually until meshed network from simple point-to-point transmission transmission at optical communication network.The scale of network topology becomes increasingly complex, and traffic carrying capacity is also in increasing situation, and the route of business and wavelength planning just need depended software to carry out.During usual software plan business, the distribution of service path can be carried out (comprising idle optical fiber and wavelength) according to channel idle situation.But when the mode of intersecting to the electricity consumption of small grain size business carries out programming dispatching, if although small grain size number of services there will be the problem needing to expend too much hardware cost when business can plan that successfully reality carries out hardware configuration by programme more at most.
Topological diagram as shown in Figure 1, suppose the business having 2 2.5Gbit/s between A point to Z point, if wherein 1 path transmission along A point, B point, Z point, another is along the path transmission of A point, C point, Z point, then, when A point configure hardware equipment, can need outfit 2 pieces of line side veneers, correspond respectively to 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 small grain size business is more, needs the hardware cost of at substantial.
Summary of the invention
The technical problem to be solved in the present invention is to provide method and the device of the planning of a kind of paths of small-granularity services in optical communication network, with the configuration quantity of the final hardware single board reduced.
In order to solve the problems of the technologies described above, the invention provides a kind of method of paths of small-granularity services in optical communication network path planning, comprising:
Be one or more virtual service by the small grain size business-binding of identical traffic start-stop node, the transmission rate of described virtual service is no more than the transmission rate of link;
Find out many alternative paths that each virtual service is corresponding;
According to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively;
Select the high alternative path of priority as the route of respective virtual business.
Further, said method also has feature below: 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 start-stop node along this alternative path direction of corresponding alternative path respectively.
Further, said method also has feature below: 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 feature below: the described start-stop node calculating corresponding alternative path respectively comprises along the step of the direction weight in this alternative path direction:
If judge, respective nodes is along business existing on first link in 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.
Further, said method also has feature below: the step of the priority of the corresponding alternative path of described calculating comprises:
The start-stop node calculating corresponding alternative path along this alternative path direction direction weight and the ratio of path weight value with corresponding alternative path, using the priority of this ratio as corresponding alternative path.
In order to solve the problem, present invention also offers a kind of device of paths of small-granularity services in optical communication network path planning, comprising:
Binding module, for being one or more virtual service by the small grain size business-binding of identical traffic start node, the transmission rate of described virtual service is no more than the transmission rate of link;
Search module, for finding out many alternative paths corresponding to each virtual service;
Computing module, for according to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively;
Select module, for the alternative path of the selecting priority high route as respective virtual business.
Further, said apparatus also has feature below:
Described computing module, also for calculating the path weight value of corresponding alternative path, calculates the direction weight of start-stop node along this alternative path direction of corresponding alternative path respectively.
Further, said apparatus also has feature below:
Described computing module, specifically for according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process, calculates the path weight value of corresponding alternative path.
Further, said apparatus also has feature below:
Described computing module, if specifically for judging that respective nodes is along business existing on first link in 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.
Further, said apparatus also has feature below:
Described computing module, specifically for the start-stop node that calculates corresponding alternative path along this alternative path direction direction weight and the ratio of path weight value with corresponding alternative path, using the priority of this ratio as corresponding alternative path.
The invention provides method and the device of the planning of a kind of paths of small-granularity services in optical communication network, compared with prior art, owing to taking small grain size business-binding and considering the method for node direction weight, make when final hardware configuration, the usage quantity of line side veneer can be reduced, thus reduce the cost of whole networking.
Accompanying drawing explanation
Fig. 1 is optical communication network topology schematic diagram;
Fig. 2 is the schematic diagram of the device of paths of small-granularity services in optical communication network path planning of the present invention;
Fig. 3 is the flow chart of the method for paths of small-granularity services in optical communication network path planning of the present invention;
Fig. 4 is the flow chart of the method for the paths of small-granularity services in optical communication network path planning of the embodiment of the present invention.
Embodiment
In order to understand the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is further described.
Fig. 2 is the schematic diagram of the device of paths of small-granularity services in optical communication network path planning 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, for being one or more virtual service by the small grain size business-binding of identical traffic start node;
Search module, for finding out many alternative paths corresponding to each virtual service;
Computing module, for according to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively,
Select module, for the alternative path of the selecting priority high route as respective virtual business.
Described computing module, also for calculating the path weight value of corresponding alternative path, calculates the direction weight of start-stop node along this alternative path direction of corresponding alternative path respectively.Particularly, for according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process, the path weight value of corresponding alternative path is calculated.If judge, respective nodes is along business existing on first link in 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, namely weight value in direction is that preset initial value adds a unit value, otherwise direction weight value is preset initial value.
Particularly, described computing module for the start-stop node that calculates corresponding alternative path along this alternative path direction direction weight and the ratio of path weight value with corresponding alternative path, using the priority of this ratio as corresponding alternative path.
Fig. 3 is the flow chart of the method for paths of small-granularity services in optical communication network path planning of the present invention, and as shown in Figure 3, this method comprises step below:
S10, be one or more virtual service by the small grain size business-binding of identical traffic start node;
S20, find out many alternative paths corresponding to each virtual service;
S30, according to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively;
S40, select the high alternative path of priority as the route of respective virtual business.
With a specific embodiment, the method that small grain size service path of the present invention is planned is described in detail below.
Such as, be that in the optical communication network system of 10Gbit/s, have 4 nodes, nodename is respectively: A, B, C, Z a transmission rate; Connection in network topology is: A-B, A-C, B-Z, C-Z, as shown in Figure 1; Need the business of planning to have the 3 groups: 1st group to be that A point has the business of 2 articles of 2.5Gbit/s to C point, the 2nd group is that C point has the business of 2 articles of 2.5Gbit/s to Z point, and the 3rd group is that A point has the business of 2 articles of 2.5Gbit/s to Z point.Fig. 4 is the flow chart of the method for the paths of small-granularity services in optical communication network path planning of the embodiment of the present invention, and as shown in Figure 4, detailed process is as follows:
3 groups of business are bound by step 100 respectively;
The business-binding of 2 articles of 2.5Gbit/s wherein in the 1st group of business is 1 speed is the virtual service of 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.
Step 200, the directive weight setting all nodes is 1; (under initial condition, supposing that all directions all do not have business)
Such as node A have B to C to, respectively setting direction weight DW
aB=1, DW
aC=1.
Step 300, travels through T1, T2 and T3, finds route successively, specific as follows:
Step 301, plan T1, find out the alternative path of T1, searching out A point has two alternative path: A-C and A-B-Z-C to C point, represents respectively with Path [A-C] and Path [A-B-Z-C].
Step 302, calculates the path weight value of every bar alternative path in T1;
The jumping figure in path is adopted to be that standard is to arrange path weight value PW in the present embodiment, Path [A-C] is only through 1 link (being referred to as 1 jumping), path weight value is expressed as PW [A-C]=1, and Path [A-B-Z-C] have passed through 3 links (3 jump), its path weight value is expressed as PW [A-B-Z-C]=3.
Step 303, calculates the weight along path direction of the start-stop node of every bar alternative path in T1;
Be initial value 1 for these two alternative path Path [A-C] of T1 and the starting point A of Path [A-B-Z-C]: Path [A-C] along the direction weight of path direction (namely A is to C direction), use DW
aCrepresent, the terminal C of Path [A-C] is initial value 1 along the direction weight of path direction (namely C is to A direction), uses DW
cArepresent; The starting point A of Path [A-B-Z-C] is initial value 1 along the direction weight of path direction (namely A is to B direction), uses DW
aBrepresent, the terminal C of Path [A-B-Z-C] is initial value 1 along the direction weight of path direction (namely C is to Z-direction), uses DW
cZrepresent.
Step 304, for T1, considers the direction weight of path weight value and start-stop node, calculates the priority of every bar alternative path, selects the high alternative path of priority as the route of business T1;
Use in the present embodiment below formula to calculate alternative path priority:
Path priority=(the direction weight of the direction weight+path termination of path starting point)/path weight value.
If the path priority of Path [A-C] and Path [A-B-Z-C] is expressed as W [A-C], W [A-B-C-Z], above-mentioned formula is utilized to obtain:
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。
Finally select alternative path Path [A-C] as the route of business T1.
Step 305, in like manner plans T2, and the alternative path finding out T2 is Path [C-Z] and Path [C-A-B-Z].
Step 306, the path weight value calculating the alternative path of T2 is respectively PW [C-Z]=1, PW [C-A-B-Z]=3.
Step 307, calculates the weight along path direction of the start-stop node of every bar alternative path in T2;
Be initial value 1 for these two alternative path Path [C-Z] of T2 and the starting point C of Path [C-A-B-Z]: Path [C-Z] along the direction weight of path direction (namely C is to Z-direction), use DW
cZrepresent, the terminal Z of Path [C-Z] is initial value 1 along the direction weight of path direction (i.e. Z-direction C direction), uses DW
zCrepresent; The starting point C of Path [C-A-B-Z] is initial value 1 along the direction weight of path direction (namely C is to A direction), but T1 passes by the direction in which before, and the remaining capacity in this direction is 5GBit/s, is not less than the service rate of T2, therefore the weight in this direction increases, DW
cAthe terminal Z of=2, Path [C-A-B-Z] is initial value 1 along the direction weight of path direction (i.e. Z-direction B direction), uses DW
cZrepresent.
Step 308, calculates the priority of T2 every bar alternative path, selects alternative path that priority is high as the route of business T2;
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。The relatively priority of alternative path, last selecting paths Path [C-Z] is as the route of business T2.
Step 309, finally plans T3, and the alternative path finding out T3 is: Path [A-B-Z] and Path [A-C-Z].
Step 310, the path weight value calculating the alternative path of T3 is respectively: PW [A-B-Z]=2, PW [A-C-Z]=2.
Step 311, calculates the weight along path direction of the start-stop node of every bar alternative path in T3;
Be initial value 1 for the alternative path Path [A-B-Z] of T3 and the starting point A of Path [A-C-Z]: Path [A-B-Z] along the direction weight of path direction (namely A is to B direction), use DW
aBrepresent, the terminal Z of Path [A-B-Z] is initial value 1 along the direction weight of path direction (i.e. Z-direction B direction), uses DW
zBrepresent; The starting point A of Path [A-C-Z] is initial value 1 along the direction weight of path direction (namely A is to C direction), but T1 passes by the direction in which before, and the remaining capacity in this direction is 5GBit/s, is not less than the service rate of T3, therefore the weight in this direction increases, DW
aCthe terminal Z of=2, Path [A-C-Z] is initial value 1 along the direction weight of path direction (i.e. Z-direction C direction), but T2 passes by the direction in which before, and the remaining capacity in this direction is 5GBit/s, be not less than the service rate of T3, therefore the weight in this direction increases, DW
zC=2.
Step 312, calculates the priority of T3 every bar alternative path, selects alternative path that priority is high as the route of business T2.
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。
The relatively priority of alternative path, last selecting paths Path [A-C-Z] is as the route of business T3.
Step 400, after 3 plans of operation complete, carries out node device configuration.Because node A has two business (T1 and T3) in C direction, on node A and node C, 1 piece of hardware single board can be respectively set along on the direction of the path P ath [A-C] selected; Node Z also has two business (T2 and T3) in C direction, on node Z and node C, 1 piece of hardware single board can be respectively set along on the direction at the path P ath [A-C-Z] selected, after such whole system has configured, 1 piece of hardware single board can be saved respectively at node A and node Z.
When more complicated network topology and traffic carrying capacity larger, use method described in the invention can reduce the configuration quantity of veneer in a large number, thus reduce the construction cost of whole network.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
These are only the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a method for paths of small-granularity services in optical communication network path planning, comprising:
Be one or more virtual service by the small grain size business-binding of identical traffic start-stop node, the transmission rate of described virtual service is no more than the transmission rate of link;
Find out many alternative paths that each virtual service is corresponding;
According to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively;
Select the high alternative path of priority as the route of respective virtual business;
Wherein, the step of the priority of the corresponding alternative path of described calculating comprises:
The start-stop node calculating corresponding alternative path along this alternative path direction direction weight and the ratio of path weight value with corresponding alternative path, using the priority of this ratio as corresponding alternative path.
2. method as claimed in 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 start-stop node along this alternative path direction of corresponding alternative path respectively.
3. method as claimed in claim 2, 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. method as claimed in claim 2, is characterized in that: the described start-stop node calculating corresponding alternative path respectively comprises along the step of the direction weight in this alternative path direction:
If judge, respective nodes is along business existing on first link in 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.
5. a device for paths of small-granularity services in optical communication network path planning, comprising:
Binding module, for being one or more virtual service by the small grain size business-binding of identical traffic start node, the transmission rate of described virtual service is no more than the transmission rate of link;
Search module, for finding out many alternative paths corresponding to each virtual service;
Computing module, for according to the path weight value of corresponding alternative path and the start-stop node of corresponding alternative path along the direction weight in this alternative path direction, calculate the priority of corresponding alternative path successively;
Wherein, described computing module, for the start-stop node that calculates corresponding alternative path along this alternative path direction direction weight and the ratio of path weight value with corresponding alternative path, using the priority of this ratio as corresponding alternative path;
Select module, for the alternative path of the selecting priority high route as respective virtual business.
6. device as claimed in claim 5, is characterized in that:
Described computing module, also for calculating the path weight value of corresponding alternative path, calculates the direction weight of start-stop node along this alternative path direction of corresponding alternative path respectively.
7. device as claimed in claim 6, is characterized in that:
Described computing module, specifically for according to the link number of corresponding alternative path process or the linkage length of corresponding alternative path process, calculates the path weight value of corresponding alternative path.
8. device as claimed in claim 6, is characterized in that:
Described computing module, if specifically for judging that respective nodes is along business existing on first link in 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.
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