CN104243306A - Optical network service restoration method and system based on resource convergence graph - Google Patents
Optical network service restoration method and system based on resource convergence graph Download PDFInfo
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Abstract
The invention discloses an optical network service restoration method and system based on a resource convergence graph. The method includes the steps that failure nodes in an optical network are regularly detected, and the failure nodes are distinguished as intermediate nodes or convergence nodes; if the failure nodes are the convergence nodes, the convergence nodes are reselected, and synergetic first topological information of the optical network and a packet-based network is acquired; weight values of multiple paths are calculated through weight values of multiple network links in the first topological information, and the path with the minimal weight value is selected as the finally-selected path. According to the method, in order to solve the problem that service restoration is difficult after failure occurs in the packet-based network borne by the optical network, the path with the minimal weight value from a source node to a host node calculated through the resource convergence graph is used for service restoration, network services can be quickly restored after network nodes fail, overall cost is reduced, and the utilization rate of network resources is increased.
Description
Technical field
The present invention relates to network optimization field, be specifically related to the optical network service restoration methods based on resource convergence figure and system.
Background technology
Current due to the fast development of the large bandwidth such as video request program, cloud computing business, data center services has attracted paying close attention to of service provider and Virtual network operator.In order to provide data center traffic, flexible optical network bearing packet network becomes one of interconnected important technology of data center.This network can pass through the router of bypass high energy consumption, with the IP of granularity unloading comparatively flexibly flow in flexible optical-fiber network.Meanwhile, the data center traffic of a large amount of delay sensitive needs high-grade end-to-end quality of service to ensure.If there is node failure in interconnected based on the data center of flexible optical network bearing packet network, due to the heterogeneity of resource diversity and technology, the network recovery guaranteed service quality has been difficult under independently operation scenario.
Summary of the invention
For defect of the prior art, the invention provides the optical network service restoration methods based on resource convergence figure and system, solve the problem of business recovery difficulty after breaking down in optical network bearing packet network.
First aspect, the invention provides a kind of optical network service restoration methods based on resource convergence figure, comprising:
Malfunctioning node in periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
If described malfunctioning node is aggregation node, then reselect aggregation node, and obtain the first collaborative topology information of optical-fiber network and packet network;
Utilize the weighted value of many network links in described first topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
Optionally, described method also comprises,
If described malfunctioning node is intermediate node, then reselect link, and obtain the second topology information of optical-fiber network and packet network respectively;
Utilize the weighted value of many network links in described second topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
Optionally, the weighted value of many network links in described first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network; The weighted value of many network links in described second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
Optionally, the weighted value of described calculating mulitpath, comprising:
To the ascending sequence of weighted value of many network links in described first topology information or the second topology information;
According to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
Optionally, the weighted value of described many network links utilized in described first topology information calculates the weighted value of mulitpath, and chooses the minimum path of described weighted value as the final path selected, and comprising:
Set up resource convergence figure according to many network link weighted values, the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
Second aspect, the invention provides a kind of optical network service recovery system based on resource convergence figure, comprising:
Detection module, for the malfunctioning node in periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
Acquisition module, for when described malfunctioning node is aggregation node, then reselects aggregation node, and obtains the first collaborative topology information of optical-fiber network and packet network;
Choose module, for the weighted value utilizing the weighted value of many network links in described first topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
Optionally, described acquisition module, also for when described malfunctioning node is intermediate node, then reselects link, and obtains the second topology information of optical-fiber network and packet network respectively;
Describedly choose module, the weighted value also for utilizing the weighted value of many network links in described second topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
Optionally, the weighted value of many network links in described first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network; The weighted value of many network links in described second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
Optionally, described in choose module, specifically for,
To the ascending sequence of weighted value of many network links in described first topology information or the second topology;
According to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
Optionally, described in choose module, specifically for,
Set up resource convergence figure according to many network link weighted values, the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
As shown from the above technical solution, the invention provides a kind of optical network service restoration methods based on resource convergence figure and system, the method overcome optical-fiber network of the prior art and packet network is independently runed, the shortcoming of complete independently business recovery, for the problem of business recovery difficulty after breaking down in optical network bearing packet network, the minimum path of the weighted value of resource convergence figure calculating from source node to destination node is utilized to carry out business recovery, the method can ensure that the restoring force of rear enhancing business occurs fault, complete packet network, the complex optimum of optical-fiber network and data center resource.
Accompanying drawing explanation
The control device structure chart of the optical network bearing packet network that Fig. 1 provides for one embodiment of the invention;
The flow chart of the optical network service restoration methods based on resource convergence figure that Fig. 2 provides for another embodiment of the present invention;
The resource convergence figure that Fig. 3 another embodiment of the present invention provides;
The structural representation of the optical network service recovery system based on resource convergence figure that Fig. 4 provides for another embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
First be described in detail the control device of optical network bearing packet network below, the service restoration method based on resource convergence figure of the present invention and system are implemented under this control device.
Fig. 1 shows the control device structure chart of the optical network bearing packet network that the embodiment of the present invention provides, as shown in Figure 1, above-mentioned control device consists of the following components, and forms as comprised optical-fiber network controller, packet network controller, ip router and optical switch node.Specifically describe as follows:
Above-mentioned IP router and optical switch node include protocol proxy module, for by protocol proxy module, realize the controlling functions of controller to node.
Above-mentioned packet network controller comprises fault recovery control module and business Detection and estimation module;
Wherein, above-mentioned business Detection and estimation module, is responsible for carrying out detecting in real time to Business Stream information in packet network and Convection states is estimated, and by fault recovery control interface by Detection and estimation information reporting fault recovery control module.
Fault recovery control module, is responsible for Request Control and the driving of packet network and the fault recovery of optical-fiber network cross-layer, fault recovery request is sent to packet network controller.
Optical-fiber network controller comprises recovery agent module, path calculation module and fault detection module;
Recovery agent module, is responsible for control and the agent functionality of Packet Based Network and the fault recovery of optical-fiber network cross-layer, receives the activation bit of cross-layer fault recovery control module, and the former destination node of fault recovery is passed to optical-fiber network controller.
Path calculation module, is responsible for the path computing containing constraints in optical-fiber network, comprises the network parameter constraints etc. such as damage perception.
Fault detection module, is responsible for detecting the node failure in optical-fiber network.
Interface name and the annexation of above-mentioned intermodule are as follows.
Fault recovery control interface 1: comprise packet network and optical-fiber network cross-layer fault recovery request and return return information, and the successful routing information of fault recovery and network abstraction resource information.
Business detects interface 2: the Detection Information comprising packet network service.
Recovery agent interface 3: the relevant information comprising business check processing.
Path computing interface 4: comprise optical network fault and survey and control information.
Fault recovery control interface 5: comprise photosphere network path result of calculation information, as path node order information, link information etc.
Fault detect interface 6: comprise network node failure information etc.
Based on above-mentioned control device, Fig. 2 shows the flow chart of the service restoration method based on resource convergence figure that the embodiment of the present invention provides, and as shown in Figure 2, said method comprises the steps:
Malfunctioning node in S201, periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
Concrete, the malfunctioning node in optical-fiber network controller periodic detection optical-fiber network, distinguishes malfunctioning node intermediate node or upper and lower road aggregation node.
If the described malfunctioning node of S202 is aggregation node, then reselect aggregation node, and obtain the first collaborative topology information of optical-fiber network and packet network;
For example, when breaking down for upper and lower road aggregation node, by the aggregation node of road up and down that the way selection of optical controller and network controller cooperation interaction is new.
The weighted value of many network links in above-mentioned first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network;
What the weighted value of many network links in above-mentioned first topology information was Internet resources utilizes information.
S203, utilize the weighted value of many network links in described first topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
Above-mentioned steps S203 also comprises unshowned sub-step in Fig. 2:
S2031, the ascending sequence of weighted value to many network links in described topology information;
S2032, according to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
Concrete, above-mentioned steps S2032 comprises: set up resource convergence figure according to many network link weighted values, and the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
Said method also comprises not shown step:
If the described malfunctioning node of S204 is intermediate node, then reselect link, and obtain the second topology information of optical-fiber network and packet network respectively;
For example, the weighted value of many network links in above-mentioned second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
S205, utilize the weighted value of many network links in described second topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
Said method is after choosing the final path selected, and business recovery is carried out in the path controlling to choose by packet network controller.
Said method overcomes optical-fiber network of the prior art and packet network is independently runed, the shortcoming of complete independently business recovery, for the problem of business recovery difficulty after breaking down in optical network bearing packet network, the minimum path of the weighted value of resource convergence figure calculating from source node to destination node is utilized to carry out business recovery, the method can ensure that the restoring force of rear enhancing business occurs fault, complete packet network, the complex optimum of optical-fiber network and data center resource, after the method makes network node break down, Network can quick-recovery soon, this method save holistic cost, improve the utilance of Internet resources.
Example is established as below with concrete resource convergence figure, illustrate the service restoration method that the present invention is based on resource convergence figure, Fig. 3 shows resource convergence figure, as shown in Figure 3, resource convergence figure is for realizing the recovery of multilayer resource, this figure contains two network layers, i.e. Packet Based Network network layers and optical-fiber network layer.In two-tier network, comprise three kinds of undirected edges, the edge that namely divides into groups, transceiver edge and frequency spectrum edge.Wherein divide into groups edge by adding up the service condition of router a period of time, and as throughput, cpu busy percentage etc., that estimates average router takies situation.Transceiver edge then reflects the cost that light/electricity is changed with electrical/optical.And frequency spectrum edge can the producing level of estimated spectral resource, mainly comprise two parameters, a parameter considers the continuity degree of each frequency spectrum and adjacent usable spectrum; Another parameter considers the frequency spectrum fragment degree on link.The embodiment of the present invention only with these two parameter citings, but is not limited to only use these two kinds of parameters to solve the producing level of the application's intermediate frequency spectrum margin estimation frequency spectrum resource.
Converge in above-mentioned resource on the basis of figure, illustrate and dividing into groups and utilizing resource convergence figure to realize the example of business recovery in optical-fiber network layer.A in figure
i, B
i, C
i, D
ifor the network node of packet network, A
o, B
o, C
o, D
ofor the network node of optical-fiber network.The malfunctioning node of optical network bearing packet network is A
0, have impact on from A
ito D
ioriginal operating path A
i-A
o-B
o-C
o-D
o-D
i.Now set up resource convergence figure, calculate the edge that divides into groups accordingly, transceiver edge and frequency spectrum edge weights in the drawings.According to different weight, calculate the path of the minimum path of weight as utilization of resources optimum, i.e. A
i-B
i-C
i-C
o-D
o-D
i, its weight is 4+1+1+1+1=8.
Fig. 4 shows the structural representation of the optical network service recovery system based on resource convergence figure that the embodiment of the present invention provides, and as shown in Figure 4, this system comprises:
Detection module 41, for the malfunctioning node in periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
Acquisition module 42, for when described malfunctioning node is aggregation node, then reselects aggregation node, and obtains the first collaborative topology information of optical-fiber network and packet network;
For example, the weighted value of many network links in above-mentioned first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network;
Choose module 43, for the weighted value utilizing the weighted value of many network links in described first topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
Described acquisition module 42, also for when described malfunctioning node is intermediate node, then reselects link, and obtains the second topology information of optical-fiber network and packet network respectively;
For example, the weighted value of many network links in above-mentioned second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
Describedly choose module 43, the weighted value also for utilizing the weighted value of many network links in described second topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
Describedly choose module, specifically for,
To the ascending sequence of weighted value of many network links in described topology information;
According to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
Describedly choose module, also for,
Set up resource convergence figure according to many network link weighted values, the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
The above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. converge an optical network service restoration methods of figure based on resource, it is characterized in that, comprising:
Malfunctioning node in periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
If described malfunctioning node is aggregation node, then reselect aggregation node, and obtain the first collaborative topology information of optical-fiber network and packet network;
Utilize the weighted value of many network links in described first topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
2. method according to claim 1, is characterized in that, described method also comprises,
If described malfunctioning node is intermediate node, then reselect link, and obtain the second topology information of optical-fiber network and packet network respectively;
Utilize the weighted value of many network links in described second topology information to calculate the weighted value of mulitpath, and choose the minimum path of described weighted value as the final path selected.
3. method according to claim 2, it is characterized in that, the weighted value of many network links in described first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network; The weighted value of many network links in described second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
4. method according to claim 3, is characterized in that, the weighted value of described calculating mulitpath, comprising:
To the ascending sequence of weighted value of many network links in described first topology information or the second topology information;
According to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
5. method according to claim 4, is characterized in that, the weighted value of described many network links utilized in described first topology information calculates the weighted value of mulitpath, and chooses the minimum path of described weighted value as the final path selected, and comprising:
Set up resource convergence figure according to many network link weighted values, the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
6. converge an optical network service recovery system of figure based on resource, it is characterized in that, comprising:
Detection module, for the malfunctioning node in periodic detection optical-fiber network, and to distinguish described malfunctioning node be intermediate node or aggregation node;
Acquisition module, for when described malfunctioning node is aggregation node, then reselects aggregation node, and obtains the first collaborative topology information of optical-fiber network and packet network;
Choose module, for the weighted value utilizing the weighted value of many network links in described first topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
7. system according to claim 6, is characterized in that,
Described acquisition module, also for when described malfunctioning node is intermediate node, then reselects link, and obtains the second topology information of optical-fiber network and packet network respectively;
Describedly choose module, the weighted value also for utilizing the weighted value of many network links in described second topology information to calculate mulitpath, and choose the minimum path of described weighted value as the final path selected.
8. system according to claim 7, it is characterized in that, the weighted value of many network links in described first topology information comprises: described optical-fiber network and packet network remove the weighted value of many network links in the weighted value of many network links in the weighted value of many network links of cooperation interaction again after malfunctioning node, described optical-fiber network and described packet network; The weighted value of many network links in described second topology information comprises: the weighted value removing many network links in the weighted value of many network links after malfunctioning node and described packet network in the weighted value of many network links of described optical-fiber network and packet network cooperation interaction, described optical-fiber network.
9. system according to claim 8, is characterized in that, described in choose module, specifically for,
To the ascending sequence of weighted value of many network links in described first topology information or the second topology information;
According to sequence, calculate the weighted value of mulitpath;
Wherein, the weighted value of described mulitpath is minimum for choosing network link weighted value according to sequence, and carries out the weighted value of the mulitpath combined for link that described weighted value is minimum.
10. system according to claim 9, is characterized in that, described in choose module, specifically for,
Set up resource convergence figure according to many network link weighted values, the path utilizing the weighted value of resource convergence figure calculating from source node to destination node minimum is as the final path selected;
Wherein, described path is the path of node of fixing a breakdown.
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