CN101908969B - Optimization method, maintenance node and network system of end-to-end restoration path - Google Patents
Optimization method, maintenance node and network system of end-to-end restoration path Download PDFInfo
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Abstract
The embodiment of the invention discloses an optimization method, a maintenance node and a network system of an end-to-end restoration path, and relates to the technical field of communication to establish a reliable end-to-end restoration path. The end-to-end restoration path comprises a normal section of an end-to-end original path and at least one section restoration path. The optimization method comprises the following steps of: acquiring information of the section restoration path, wherein the information comprises the attribute of each node of the section restoration path; judging whether the performance of the section restoration path meets preset performance indexes according to the attribute of each node; and if the performance of the section restoration path does not meet the preset performance indexes, indicating a head node of the section restoration path to establish a new section restoration path.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of optimization method, Maintenance Point and network system of end-to-end restoration path.
Background technology
In the implementation procedure of business, need set up this professional source end and the transmission path between the Su Duan, this path is called end-to-end original path.Break down and work as this end-to-end original path, the new available path that also needs to set up between this source end and this Su Duan transmits this business with continuation, and this path is called end-to-end restoration path.
The existing method of setting up end-to-end restoration path is as described below:
A, when end-to-end original path breaks down, the node that detects fault is communicated to fault message the first node that recovers section under the fault point.
Wherein, before this step, divide to have on the end-to-end original path and independently recover section, and specify each to recover head, the end-node of section.
B, the first node that recovers section are set up the section restoration path, set up this section restoration path after, with this switching services to this section restoration path.The normal reach of this section restoration path and end-to-end original path is formed end-to-end restoration path.
Yet there are the following problems at least for the end-to-end restoration path that said method is set up:
This end-to-end restoration path by the end-to-end original path of part and one or more independently the section restoration path be spliced, cause the poor reliability of this end-to-end restoration path.
Summary of the invention
The embodiment of the invention provides a kind of optimization method, source end, first node and communication system of end-to-end restoration path, to set up reliable end-to-end restoration path.
For achieving the above object, the embodiment of the invention adopts following technical scheme:
On the one hand, provide a kind of optimization method of end-to-end restoration path, described end-to-end restoration path comprises normal reach and at least one section restoration path of end-to-end original path, and described method comprises:
Obtain the information of section restoration path, described section restoration path information comprises the attribute of each node of described section restoration path;
Whether the performance according to the described section restoration path of the determined property of described each node satisfies the performance index that set in advance;
If the performance of described section restoration path does not satisfy the performance index that set in advance, indicate the first node of described section restoration path to set up a new section restoration path.
On the one hand, provide a kind of Maintenance Point, comprising:
Acquisition module, for the information of obtaining the section restoration path, described section restoration path information comprises the attribute of each node of described section restoration path;
Judge module, whether the performance that is used for the described section restoration path of determined property of each node of obtaining according to described acquisition module satisfies the performance index that set in advance;
Processing module is used for judging the performance of described section restoration path when described judge module and does not satisfy the performance index that set in advance, and indicates the first node of described section restoration path to set up a new section restoration path.
On the one hand, provide a kind of network system, described network system comprises at least safeguards that node and at least one end-to-end restoration path, described end-to-end restoration path comprise normal reach and at least one section restoration path of end-to-end original path;
Described Maintenance Point, for the information of obtaining the section restoration path, described section restoration path information comprises the attribute of each node of described section restoration path; Whether the performance according to the described section restoration path of the determined property of described each node satisfies the performance index that set in advance; If the performance of described section restoration path does not satisfy the performance index that set in advance, indicate the first node of described section restoration path to set up a new section restoration path.
The optimization method of the end-to-end restoration path that the embodiment of the invention provides, Maintenance Point and network system, Maintenance Point carries out unified management according to the information of each section restoration path to end-to-end restoration path, when the performance of arbitrary section restoration path does not satisfy the performance index that arrange, this end-to-end restoration path is optimized processing, namely indicate the first node of this section restoration path to set up a new section restoration path, this new section restoration path has improved the reliability of this end-to-end restoration path.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structure chart of the Maintenance Point that Fig. 1 provides for the embodiment of the invention;
The optimization method flow chart of the end-to-end restoration path that Fig. 2 provides for the embodiment of the invention;
A kind of network system that Fig. 3 provides for the embodiment of the invention;
The method flow diagram that the end-to-end restoration path in the network system shown in Figure 3 that Fig. 4 provides for the embodiment of the invention is optimized.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Optimization method, Maintenance Point and the network system of the end-to-end restoration path that the embodiment of the invention is provided below in conjunction with accompanying drawing are described in detail.
The embodiment of the invention at first provides a kind of network system and Maintenance Point, this network system comprises this Maintenance Point and at least one end-to-end restoration path, and this end-to-end restoration path comprises normal reach and at least one section restoration path of end-to-end original path.Wherein, this Maintenance Point can be the source end of this end-to-end restoration path, also can be webmaster or other node of this end-to-end restoration path of monitoring.
This Maintenance Point is used for obtaining the information of section restoration path, and this information comprises the attribute of each node of this section restoration path, and this attribute comprises any one or the combination in any in the flow of the title of described each address of node, each node and each node; Whether the performance according to this section restoration path of determined property of each node satisfies the performance index that set in advance; If the performance of this section restoration path does not satisfy the performance index that set in advance, indicate the first node of this section restoration path to set up a new section restoration path.
The structure of this Maintenance Point comprises acquisition module 1, judge module 3 and processing module 5 as shown in Figure 1.
Acquisition module, for the information of obtaining the section restoration path, this information comprises the attribute of each node of this section restoration path.
Judge module, whether the performance that is used for this section restoration path of determined property of each node of obtaining according to acquisition module satisfies the performance index that set in advance.
This judge module comprises that one arranges unit 31, and this arranges the unit and is provided with the performance index that each section restoration path need satisfy, and the performance index of each section restoration path can be identical, also can be the different corresponding different performance index of section restoration path.
Wherein, these performance index can be the flow indicators that the summation of each node of corresponding section restoration path and/or each node need satisfy.Each node that these performance index can also further limit in arbitrary section restoration path must be the normal reach of end-to-end original path and the node outside other section restoration path.This restriction can be avoided the path loopback in the end-to-end restoration path, and present embodiment is called this restriction avoids producing path loopback index.
What deserves to be explained is: these performance index that arrange that the unit sets in advance can be above-mentioned flow indicators and avoid producing any one or combination in the loopback index of path, also can be other performance index, for example, the load indexs that each node need satisfy in the section restoration path etc., namely the peak load of each node needs the maximum stream flow more than or equal to the business of transmission.
As shown in Figure 1, this Maintenance Point also comprises processing module.This processing module is used for judging the performance of this section restoration path when judge module and does not satisfy the performance index that set in advance, and indicates the first node of this section restoration path to set up a new section restoration path.
For example, corresponding with the flow indicator that judge module arranges, after judge module judges that the performance of this section restoration path does not satisfy flow indicator, this processing module is to the first node sending flow rate control strategy of this section restoration path, this flow control strategy be Maintenance Point according to the information (comprising the information that this end-to-end restoration path is current) of network system definite be used for the strategy that first node is set up a section restoration path new and that meet flow indicator.
In like manner, when performance that this judge module is judged this section restoration path do not satisfy avoid producing path loopback index after, this processing module issues path loopback control strategy to the first node of this section restoration path, this path loopback control strategy be Maintenance Point according to the information (comprising the information that this end-to-end restoration path is current) of network system definite be used for first node set up one new and meet the strategy of the new section restoration path of avoiding producing path loopback index.For example, this path loopback control strategy comprises in the network system information such as the title of the node that can not be used for new section restoration path to be set up or address.
Corresponding with the instruction content of Maintenance Point, the first node of section restoration path can be set up new section restoration path with following dual mode:
Mode one, when the indication that receives comprises flow control strategy and/or path loopback control strategy, this head node is set up new section restoration path according to this flow control strategy and/or path loopback control strategy.The performance of new section restoration path meet the demands certainly (performance index that namely set in advance).
Mode two, when flow control strategy and/or path loopback control strategy are not carried in the indication that receives, this head node is set up new section restoration path information according to the strategy of self.The performance of the section restoration path that this is new not necessarily meets the demands, therefore should the head node need will this new section restoration path information send to Maintenance Point, this Maintenance Point judges again then whether the performance of the section restoration path that this is new satisfies the performance index that set in advance, if satisfy, stop to indicate this head node to set up the section restoration path that upgrades; If do not satisfy, indicate this head node to set up the section restoration path that upgrades, meet the demands until the performance of the section restoration path of setting up.
The network system that the embodiment of the invention provides and Maintenance Point, this Maintenance Point carries out unified management according to the information of each section restoration path to end-to-end restoration path, when the performance of arbitrary section restoration path does not satisfy the performance index that arrange, this end-to-end restoration path is optimized processing, namely indicate the first node of this section restoration path to set up a new section restoration path, this new section restoration path has improved the reliability of this end-to-end restoration path.
The embodiment of the invention also provides a kind of optimization method of end-to-end restoration path, as shown in Figure 2, comprising:
S201 obtains the information of section restoration path, and this information comprises the attribute of each node of this section restoration path.This attribute comprises any one or the combination in any in the flow of the title of described each address of node, each node and each node.
In this step, the information that Maintenance Point obtains the section restoration path has initiatively and passive dual mode.Under the active mode: the first node of place, fault point section is set up after the section restoration path, and Maintenance Point initiatively sends request to this head node, after this head node receives this request, the information of section restoration path is sent to this Maintenance Point.Under the passive mode, the first node of place, fault point section is set up after the section restoration path, initiatively sends the information of section restoration path to this Maintenance Point.
Whether S202 satisfies the performance index that set in advance according to the performance of this section restoration path of determined property of each node, if satisfy, continues to utilize this section restoration path to come transport service; Otherwise, change S203.Wherein, these performance index can be flow indicators, also can be to avoid producing path loopback index or other performance index.
If the title of each node and address all are unique in the network system, whether the performance of section restoration path satisfied and avoids producing path loopback index under then Maintenance Point can be judged according to each address of node or each nodename.Judgment principle is as follows:
If there is not common factor in the address of node (or title) of the normal reach of all addresss of node (or title) in a certain section restoration path and end-to-end original path and other section restoration path, the performance of then judging this section restoration path satisfies avoids producing path loopback index; Otherwise the performance of judging this section restoration path does not satisfy avoids producing path loopback index.
S203 if the performance of section restoration path does not satisfy the performance index that set in advance, indicates the first node of this section restoration path to set up a new section restoration path.
In this step, Maintenance Point can issue a simple indication to first node, after first node receives this indication, sets up a new section restoration path by the strategy of self.Maintenance Point also can be to first node sending flow rate control strategy and/or path loopback control strategy, so that first node is once namely set up satisfactory new section restoration path according to this flow control strategy and/or path loopback control strategy.
The optimization method of the end-to-end restoration path that the embodiment of the invention provides, Maintenance Point carries out unified management according to the information of each section restoration path to end-to-end restoration path, when the performance of arbitrary section restoration path does not satisfy the performance index that arrange, this end-to-end restoration path is optimized processing, namely indicate the first node of this section restoration path to set up a new section restoration path, this new section restoration path has improved the reliability of this end-to-end restoration path, and the end-to-end restoration path after optimizing is a complete end-to-end path, can realize restarting recovery, unusual deletion back reconstruction waits operation.
Below in conjunction with concrete scene, the technical scheme that the embodiment of the invention is provided is described in detail.
Fig. 3 provides a kind of network system.This network system comprises professional source end A and professional place end Z, and in the present embodiment, the Maintenance Point in this network system is source end A.Fig. 4 provides a kind of method that end-to-end restoration path among Fig. 3 is optimized.As shown in Figure 4, this method comprises:
S401 divides section at end-to-end original path.
This step can have been divided section by the source end when setting up end-to-end original path, and specifies first node and the end-node of each section.Also can be by webmaster or manually finish section division.Wherein, a last section can exist with next section and intersect, for example, can in a last section, select an intermediate node as the first node of next section, thereby after the first node of next section breaks down or sets up the failure of section restoration path, set up the section restoration path again by the first node of a last section.
Behind the subregion, the first node of each section is responsible for the route maintenance work of this section, makes the performance of the end-to-end path under the big net environment can reach the performance requirement under the little net environment.
In network system shown in Figure 3, the end-to-end original path of this business is A-B-C-D-E-F-G-Z, and this end-to-end original path is divided into 5 sections of aftermentioned: A-B section, B-C-D section, D-E section, E-F-G section and G-Z section.
S402, the arbitrary node on end-to-end original path breaks down, and the first node of place, fault point section is set up a section restoration path according to fault message, and switches the business on the section restoration path.
At this moment, end-to-end restoration path is made up of normal reach and the section restoration path of end-to-end original path, and each section restoration path independently of one another, does not need source end A (being Maintenance Point) to intervene.
Optionally, this head node also can report a fault message to the source end, so that the source end can determine that end-to-end original path breaks down according to this fault message, and a timer is set to wait for the information that receives the section restoration path.When this source end did not receive the information of section restoration path yet behind this timer expiry, this source end stopped carrying out S404 and step afterwards thereof, and from the beginning set up an end-to-end restoration path to continue transport service.
S403, the first node of place, fault point section is section restoration path information announcement source end.This section restoration path information is the attribute information of each node of the successful section restoration path of foundation.
Optionally, when the first node of place, fault point section is set up the failure of section restoration path, Xiang Yuanduan sends section and recovers failed message, so that from the beginning the source end sets up an end-to-end restoration path, this end-to-end restoration path is initiated and can not comprised the normal reach of end-to-end original path by source end A.
What deserves to be explained is: because the end-to-end restoration path under the big net environment is very long, therefore, it is also very long that from the beginning source end A sets up time of end-to-end restoration path.And it is corresponding with the partitioned mode among the S401, when if the last section in the network system is disposed by the mode of intersecting with next section, after then next node is set up the failure of section restoration path, can set up the section restoration path again by a last node, thereby avoid this source end from the beginning to set up an end-to-end restoration path.
Corresponding with network system shown in Figure 3, when C breaks down, the first Node B of section is set up section restoration path B-H-D under the C, then with this switching services to this section restoration path, and send the information of this section restoration path to source end A.This information comprises any one or the combination in any in address, title and the flow of Node B, any one in the address of node H, title and the flow or combination in any, and any one or combination in any in the address of node D, title and the flow.
When F breaks down, the first node E of section sets up section restoration path E-H-G under the F, then with this switching services to this section restoration path, and send the information of this section restoration path to source end A.This information comprises address, title and the flow of node E, the address of node H, title and flow, and the address of node G, title and flow.
S404, the source end obtains the information of section restoration path, and this information comprises the attribute of each node of section restoration path.
S405, whether the source end satisfies the performance index that set in advance according to the performance of section restoration path under the determined property of each node.If do not satisfy, change S406; If satisfy, continue to utilize this section restoration path to transmit this business.
Corresponding with network system shown in Figure 3, when C is in fault case separately, current end-to-end restoration path is A-B-H-D-E-F-G-Z, wherein, this end-to-end restoration path includes only a section restoration path B-H-D, and this B-H-D can not produce the path loopback, satisfies and avoids producing path loopback index.When the performance index of source end setting include only when avoiding producing path loopback index, source end A can continue to utilize this section restoration path B-H-D to come transport service.When the performance index of source end A setting also comprised flow indicator, then end A in source also needed further judge whether this section restoration path B-H-D satisfies this flow indicator.
In like manner, when F was in fault case separately, current end-to-end restoration path was A-B-C-D-E-H-G-Z, wherein, this end-to-end restoration path includes only a section restoration path E-H-G, and this E-H-G can not produce the path loopback, satisfies and avoids producing path loopback index.When the performance index of source end setting include only when avoiding producing path loopback index, source end A can continue to utilize this section restoration path E-H-G to come transport service.When the performance index of source end A setting also comprised flow indicator, then end A in source also needed further judge whether this section restoration path E-H-G satisfies this flow indicator.
Yet, when C and F are in fault case simultaneously, the information of the B-H-D that source end A can send according to Node B and the information of the E-H-G that node E sends judge that these two section restoration paths have shared node H, do not avoid producing path loopback index thereby do not satisfy, and change following S406.
S406, the first node of source end indication section restoration path is set up a new section restoration path.
When C and F were in fault case simultaneously, source end A can continue to utilize B-H-D to continue to transmit this business, and instructs node E sets up the new section restoration path between E, the G.Optionally, source end A can also issue path loopback control strategy to node E, and this path loopback control strategy comprises Node B, H, C, D and the strategy of F eliminating outside new section restoration path.Corresponding with Fig. 3, node E rebulids a new section restoration path E-I-G according to the indication of source end A.Thereby when C and F were in fault case simultaneously, the path that end-to-end restoration path is optimized after the processing was A-B-H-D-E-I-G-Z, and there is not the path loopback in this path, has improved reliability; And this path has utilized the existing resource of A-B-H-D-E and G-Z section, do not need A-B-H-D-E and G-Z section are carried out any processing, realize simple, high efficiency, thus really make the performance of the end-to-end path under the big net environment can reach the performance requirement under the little net environment.
What deserves to be explained is: source end A also can continue to utilize E-H-G to continue to transmit this business, and instructs node B is set up the new section restoration path between a B and the D; Perhaps set up a new section restoration path by source end A while instructs node B and node E.For example, the performance index that arrange as source end A also comprise flow indicator, and then when C and F were in fault case simultaneously, the section restoration path that source end A can select a flow more to meet flow indicator from B-H-D and E-H-G continued to transmit this business; When B-H-D and E-H-G did not satisfy flow indicator, source end A instructs node B and node E simultaneously set up a new section restoration path.
S407, first node switch to new section restoration path with business after setting up new satisfactory section restoration path, and delete old section restoration path.
Optionally, when the fault of the C among Fig. 3 and F was got rid of, source end A can also switch the business on the end-to-end original path A-B-C-D-E-F-G-Z, and deletion section restoration path.
In the present embodiment, the source end carries out unified management according to the information of the section restoration path that first node provides to end-to-end restoration path, when the performance of arbitrary section restoration path does not satisfy the performance index that arrange, this end-to-end restoration path is optimized processing, namely indicate the first node of this section restoration path to set up a new section restoration path, this new section restoration path has improved the reliability of this end-to-end restoration path, and the end-to-end restoration path after optimizing is a complete end-to-end path, can realize restarting recovery, unusual deletion back reconstruction waits operation.Can be widely used in the communication systems such as ASON (Automatic Switched Optical Network, ASON) network.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. the optimization method of an end-to-end restoration path is characterized in that, described method comprises:
Maintenance Point has been divided section when setting up end-to-end original path, and specify first node and the end-node of each section, thereby make when the arbitrary node on the end-to-end original path breaks down, the first node of place, fault point section is set up a section restoration path according to fault message, and reports described fault message to described Maintenance Point;
Described Maintenance Point determines that according to described fault message end-to-end original path breaks down, and a timer is set to wait for the information that receives described section restoration path;
When described Maintenance Point does not receive the information of section restoration path yet behind described timer expiry, perhaps receive section when recovering failed message, from the beginning described Maintenance Point sets up an end-to-end restoration path;
When described Maintenance Point receives the information of described section restoration path, whether the performance according to the described section restoration path of the determined property of described each node satisfies the performance index that set in advance, and described information comprises the attribute of each node of described section restoration path; If the performance of described section restoration path does not satisfy the performance index that set in advance, indicate the first node of described section restoration path to set up a new section restoration path.
2. the optimization method of end-to-end restoration path according to claim 1 is characterized in that, the attribute of described each node of section restoration path comprises any one or the combination in any in the flow of the title of described each address of node, each node and each node.
3. the optimization method of end-to-end restoration path according to claim 2 is characterized in that,
The described performance index that set in advance comprise flow indicator and avoid producing any one or combination in the loopback index of path.
4. the optimization method of end-to-end restoration path according to claim 3 is characterized in that, the first node of the described section restoration path of described indication is set up a new section restoration path and comprised following any one or combination:
Do not satisfy flow indicator if judge the performance of described section restoration path according to the flow of described each node, to the first node sending flow rate control strategy of described section restoration path; And/or
Avoid producing path loopback index if the performance of judging described section restoration path according to the title of described each address of node or each node does not satisfy, issue path loopback control strategy to the first node of described section restoration path.
5. Maintenance Point, it is characterized in that, described Maintenance Point, be used for when setting up end-to-end original path, having divided section, and specify first node and the end-node of each section, thereby make that the first node of place, fault point section is set up a section restoration path according to fault message, and reports described fault message to described Maintenance Point when the arbitrary node on the end-to-end original path breaks down;
Described Maintenance Point also is used for determining that according to described fault message end-to-end original path breaks down, and a timer is set to wait for the information that receives described section restoration path; When described Maintenance Point does not receive the information of section restoration path yet behind described timer expiry, perhaps receive section when recovering failed message, from the beginning described Maintenance Point sets up an end-to-end restoration path;
Described Maintenance Point comprises:
Acquisition module, for the information that receives described section restoration path, described information comprises the attribute of each node of described section restoration path;
Judge module, whether the performance that is used for the described section restoration path of determined property of each node of receiving according to described acquisition module satisfies the performance index that set in advance;
Processing module is used for judging the performance of described section restoration path when described judge module and does not satisfy the performance index that set in advance, and indicates the first node of described section restoration path to set up a new section restoration path.
6. Maintenance Point according to claim 5 is characterized in that, described judge module is provided with the unit is set, and the described unit that arranges is provided with the flow indicator of section restoration path and avoids producing any one or combination in the loopback index of path.
7. according to claim 5 or 6 described Maintenance Points, it is characterized in that,
Described processing module also is used for judging that according to the flow of described each node the performance of described section restoration path does not satisfy flow indicator when described judge module, to the first node sending flow rate control strategy of described section restoration path.
8. according to claim 5 or 6 described Maintenance Points, it is characterized in that,
Described processing module, also be used for judging according to the title of described each address of node or each node that the performance of described section restoration path does not satisfy when described judge module and avoid producing path loopback index, issue path loopback control strategy to the first node of described section restoration path.
9. a network system is characterized in that, described network system comprises at least safeguards node and at least one end-to-end restoration path;
Described Maintenance Point, be used for when setting up end-to-end original path, having divided section, and specify first node and the end-node of each section, thereby make when the arbitrary node on the end-to-end original path breaks down, the first node of place, fault point section is set up a section restoration path according to fault message, and reports described fault message to described Maintenance Point;
Described Maintenance Point also is used for determining that according to described fault message end-to-end original path breaks down, and a timer is set to wait for the information that receives described section restoration path; When described Maintenance Point does not receive the information of section restoration path yet behind described timer expiry, perhaps receive section when recovering failed message, from the beginning described Maintenance Point sets up an end-to-end restoration path;
Described Maintenance Point also is used for receiving the information of described section restoration path, and described information comprises the attribute of each node of described section restoration path; Whether the performance according to the described section restoration path of the determined property of described each node satisfies the performance index that set in advance; If the performance of described section restoration path does not satisfy the performance index that set in advance, indicate the first node of described section restoration path to set up a new section restoration path.
10. network system according to claim 9 is characterized in that,
Described Maintenance Point is the source end of described end-to-end restoration path or the webmaster of monitoring described end-to-end restoration path.
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