CN102664700A - Synchronous planning method of node clock in mesh network - Google Patents
Synchronous planning method of node clock in mesh network Download PDFInfo
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- CN102664700A CN102664700A CN2012101070905A CN201210107090A CN102664700A CN 102664700 A CN102664700 A CN 102664700A CN 2012101070905 A CN2012101070905 A CN 2012101070905A CN 201210107090 A CN201210107090 A CN 201210107090A CN 102664700 A CN102664700 A CN 102664700A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0679—Clock or time synchronisation in a network by determining clock distribution path in a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
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Abstract
The invention discloses a synchronous planning method of a node clock in a mesh network, which relates to the field of photo-communication. The method comprises the following steps: building network data, dividing a network into domains, providing two usable clock sources in each domain, setting priority levels of network nodes and links; traversing the nodes in the domain, detecting the clock state of each node, calculating the nodes without primary and/or spare clock sources by taking the domain as a unit; calculating primary and/or spare clock paths of the nodes by adopting the shortest path first (SPF) algorithm, configuring primary and/or spare clock links of the nodes according to the calculated primary and/or spare clock paths, and obtaining the primary and/or spare clock source for each node. The synchronous planning method disclosed by the invention can achieve automatic planning of a clock synchronous network in the complicated mesh network, can be applied to network management or control plane algorithm of the node, automatically searches the usable clock sources after achieving clock interrupt and overcomes the problems such as complexity, inaccuracy and the like of manual planning.
Description
Technical field
The present invention relates to optical communication field, particularly relate to the synchronous planing method of nodal clock in a kind of mesh network.
Background technology
The message transmission of optical network device need keep clock synchronization, at present the planning of clock synchronous network is generally planned by manual work.In ring network or chain net, each nodal clock is originated synchronously, be easy to carry out clock planning according to standard.But become increasingly complex when network, when forming mesh network, nodal clock is planned synchronously, adopt just suitable difficulty of artificial planning, and be not easy to judge whether clock can become ring under the various situation, whether the active and standby source of clock can interrupt etc. simultaneously.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology; Provide the nodal clock in a kind of mesh network synchronous planing method; Can realize the automatic planning of clock synchronous network in the complex web mesh network, can use on the webmaster or the control plane algorithm of node in, realize having no progeny in the clock; Automatically seek available clock source, overcome the problems such as complexity and inaccuracy of manual planning.
The synchronous planing method of nodal clock in the mesh network provided by the invention may further comprise the steps: A, set up network data, network is carried out the branch territory, make to have two available clock sources in each territory, and the priority level of network node and link is set; Node in B, the traversal territory; The clock status of inspection node; To there not being node main and/or clock source fully is that unit calculates with the territory: adopt SPF SPF algorithm, the active/standby clock path of computing node is according to the active/standby clock path that calculates; The active/standby clock chain circuit of configuration node is for each node obtains the active/standby clock of clock source.
In technique scheme, if had a clock path in the territory, when another clock path of computing node, the link and the node of the clock path process that has existed are set to low priority resources among the step B.
In technique scheme, for the node that does not have the clock source, calculate the active clock path from the active clock source to the node earlier among the step B, according to the active clock path of calculating, the active clock link of configuration node; The link of active clock path process and node are set to low priority resources again, the standby clock path of computing node, and according to the standby clock path of calculating, the standby clock link of configuration node.
In technique scheme, when the clock path of computing node, the link dedicated bandwidth mode of this clock path process is carried out mark among the step B, and calculate the load of link, carry out equilibrium.
In technique scheme, further comprising the steps of among the step B: for the node that obtains active/standby clock source, the active clock source and the standby clock source of identification nodes respectively.
In technique scheme,, then from adjacent territory, quote a clock source and come, as second clock source in this territory if having only an available clock source in the steps A in certain territory.
In technique scheme, when setting up network data in the steps A,, obtain network data from webmaster through mutual with webmaster, perhaps, manually set up network data through graphical interfaces.
In technique scheme, carry out alternately through expandable mark language XML formatted file and webmaster, perhaps directly mutual with webmaster through common object request broker interface, from webmaster acquisition network data.
In technique scheme; In the steps A for two available clock sources in each territory; Artificial specify a master clock source and one to be equipped with the clock source, the master clock information of all nodes all obtains from master clock source in the territory in, all nodes be equipped with clock information all from being equipped with the acquisition of clock source.
In technique scheme, for two available clock sources in each territory, each node obtains active and standby clock information from two clock sources respectively according to the distance of node to two clock sources itself in the territory in the steps A.
Compared with prior art, advantage of the present invention is following:
The present invention can realize the automatic planning of clock synchronous network in the complex web mesh network; In ASON (Automatically Switched Optical Network, ASON) net, automatically seek available clock source, difficulty and the program results that has solved clock synchronous network artificial planning in the complicated mesh network be optimum problem not; Can avoid the mistake of artificial planning; Can use on the webmaster or the control plane algorithm of node in, realize having no progeny in the clock, seek available clock source automatically.
Description of drawings
Fig. 1 is the sketch map of network node clock synchronization planning instance one in the embodiment of the invention.
Fig. 2 is the sketch map of network node clock synchronization planning instance two in the embodiment of the invention.
Fig. 3 is the sketch map of network node clock synchronization planning instance three in the embodiment of the invention.
Fig. 4 is the sketch map of network node clock synchronization planning instance four in the embodiment of the invention.
Fig. 5 is the sketch map of an instance mesh network making up in the embodiment of the invention.
Fig. 6 is the clock synchronous network program results that mesh network adopts embodiment of the invention method to realize among Fig. 5.
Among the figure: circle is represented the clock source, the box indicating network node, and no arrow number line is represented link between node, and band arrow number line is represented the master clock source trend, and band arrow straight dashed line is represented clock source trend fully.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
The synchronous planing method of nodal clock in the mesh network that the embodiment of the invention provides may further comprise the steps:
S1, set up network data, two kinds of approach arranged:
A, obtain network data: through the special interface file from webmaster; XML (Extensible Markup Language for example; Extend markup language) formatted file, but be not limited to the XML formatted file, obtain data alternately with webmaster; Perhaps directly mutual through corba interface (common object request broker interface) and webmaster, obtain network data.
B, through graphical interfaces, manually set up network data.
S2, network is in the light of actual conditions carried out the branch territory, the standard in branch territory: make and be up to two available clock sources in each territory, all nodal clocks of other in the territory will obtain from these two clock sources.Referring to shown in Figure 1, node 1 is the node in clock source 1, and node 3 is the node in clock source 2, and the clock of other node will be obtained by these two node transmission.If have only an available clock source in certain territory, then can quote a clock source and come, as second clock source in this territory from adjacent area.
S3, the priority level of network element is set, some node or optical link in the network are less stables; Thereby in design clock net; Hope to try not to draw the clock source, or some point is more stable, in design clock net, hopes preferentially to select these points from these points; Thereby node in the network or link be provided with priority level, to distinguish.
If the part of nodes in the S4 network has had clock and has obtained the path; Only need be newly-built design of node clock net; Then need the clock path of having built be identified; Referring to shown in Figure 1, sign is taked following method: be clock input source 1 (master clock source) of node identification node, the clock input source 2 (being equipped with the clock source) of node;
S5, calculate,, adopt following method for each node obtains the active/standby source of clock:
(1) be that unit calculates with the territory, if be regardless of territory, the same default domain of then whole network apparent.
(2) node in the traversal territory, the clock status of inspection node.
The clock status of node has following several kinds:
1. node has the master clock source, but does not have the clock of being equipped with source;
2. node has clock source fully, but does not have the master clock source;
3. the active and standby clock of node source is complete;
4. node does not have the clock source.
(3) be equipped with the node that clock is originated to the master clock source is arranged, adopt following method to carry out the configuration of clock source:
Extract master clock path (list of link) from the clock source node to destination node; Utilize SPF (Shortest Path First; SPF) algorithm calculates the standby clock link, during calculating from the second clock source to destination node; The link and the node of active clock path process are made as low priority resources, to reach the purpose that active and standby clock path repels mutually; According to the clock path that is equipped with that calculates, begin configuration from destination node and be equipped with clock chain circuit, when node on the path is existing when being equipped with clock chain circuit, stop configuration.Referring to shown in Figure 2, the master clock of node 5 will pass over from node 4, being equipped with clock and will passing over from node 2 of node 5, be defined as clock chain circuit from the transmission of 4-5.From 1-4,4-5 is defined as the master clock path of node 5, and 3-2,2-5 are defined as the clock path that is equipped with of node 5.
(4) to the node that is equipped with the clock source and does not have the master clock source is arranged, adopt following method to carry out the configuration of clock source:
Extract clock path fully, utilize the SPF algorithm, calculate the active clock path from the first clock source to destination node, during calculating, classify the link and the node of standby clock path process as low priority resources; Master clock path according to calculating begins to dispose the master clock link from destination node, when node on the path has the master clock link, stops configuration.
(5), adopt following method to carry out the configuration of clock source to there not being the node in clock source:
Calculate the active clock path earlier: to destination node, adopt the SPF algorithm from the first clock source, calculate an active clock path, according to the active clock path of calculating, the active clock link of configuration node; Calculate the standby clock path of destination node again, during calculating, the node and the link of the active clock path process of node is made as low priority resources; According to the standby clock path of calculating, begin configuration from destination node and be equipped with clock chain circuit, when the node on the path is existing when being equipped with clock chain circuit, stop configuration.
(6) if the clock source node is arranged in the territory; Be not equipped with the clock source; But the second clock source is arranged, then calculate a clock path, according to the clock path that calculates from the second clock source to the clock source node; Begin to be provided with clock chain circuit from the clock source node, the existing clock chain circuit that is equipped with of the node on the path.
(7) when calculating clock path, the link dedicated bandwidth mode of path process is carried out mark, when calculating, calculate the load of link, carry out equilibrium, avoid clock chain circuit too concentrated, with the bottleneck that causes clock to transmit.Referring to shown in Figure 3, the active clock path of node 5 is 1-2,2-5; The standby clock path is 3-2,2-5, configurable clock generator path like this; Cause the active and standby clock path of node 5 to intersect, increased the loss of clock risk, in this method at node 2; Consider the separation of active and standby clock path when calculating active and standby clock path, reduced this risk.
(8) transmit jumping figure according to node to the clock between the clock source node, according to planning mode B/C adjustment master/backup clock path; Wherein the B mode refers to have in the territory one main one to be equipped with two clock sources, and the master clock information of all nodes all obtains from master clock source in the territory, and all are equipped with clock information and all obtain from being equipped with the clock source.The C mode refers to have in the territory two clock sources, and the territory interior nodes obtains active and standby clock information from two clock sources respectively according to the distance in node self and clock source.Referring to shown in Figure 4, clock source 1 and 2 is a master clock source all, presses the distance of node from the clock source, and which paths the adjustment node should use be the master clock path, and which bar is for being equipped with clock path.Be said C mode in the clock standard, and be the B mode shown in Fig. 2.
Through in " clock synchronous network planning analog simulation software ", realizing, verify the feasibility of embodiment of the invention method below.This software is one and has GUI (the Graphical User Interface that topology editor, attributes edit, timing parameter such as are provided with at module; Graphic user interface) application program; The topological structure of simulated clock simulation clock Synchronization Network visually; The clock source is set, sets the constraints of clock planning, and can plan clock path according to the algorithm of foregoing description.Can be following in concrete mode:
(1) referring to shown in Figure 5, made up an instance MESH network among Fig. 5, no arrow straight line representes to exist between 2 nodes optical fiber link to connect.Increase by 12 nodes in the topology editor district, node is distributed as matrix type.Connect through straight line between the connected node, but between the expression node link of transmit clock signal is arranged.
(2) selecting " NODE1 " is clock source 1, and selecting " NODE12 " is clock source 2;
(3) the related constraint condition of clock path is set, as comprises and the resource of repelling, for example: node.
(4) select the clock path transfer mode that to adopt.Transfer mode has three kinds of A, B, C.These three kinds of modes can be referring to " People's Republic of China's communication industry standard requires based on the simultaneous techniques that SDH transmits net " YD/T 1267-2003.Use the B mode to plan in this example;
(5) carry out clock synchronous network planning.This step is carried out the algorithm in the said method clock chain circuit planning of the whole network as a function items;
(6) behind the execution planning algorithm, software adds the master clock path automatically and is equipped with clock path between each node, and referring to shown in Figure 6, Fig. 6 has demonstrated and adopted the clock synchronous network program results of realizing behind the said method.Treat that the arrow number line representes the master clock path of Synchronization Network, band arrow straight dashed line is represented the clock path that is equipped with of Synchronization Network.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (10)
1. the synchronous planing method of nodal clock in the mesh network is characterized in that may further comprise the steps:
A, set up network data, network is carried out the branch territory, make to have two available clock sources in each territory, and the priority level of network node and link is set;
Node in B, the traversal territory; The clock status of inspection node; To there not being node main and/or clock source fully is that unit calculates with the territory: adopt SPF SPF algorithm, the active/standby clock path of computing node is according to the active/standby clock path that calculates; The active/standby clock chain circuit of configuration node is for each node obtains the active/standby clock of clock source.
2. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1; It is characterized in that: had a clock path as if in the territory among the step B; When another clock path of computing node, the link and the node of the clock path process that has existed are set to low priority resources.
3. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1; It is characterized in that: among the step B for the node that does not have clock source; Calculate the active clock path from the active clock source to the node earlier; According to the active clock path of calculating, the active clock link of configuration node; The link of active clock path process and node are set to low priority resources again, the standby clock path of computing node, and according to the standby clock path of calculating, the standby clock link of configuration node.
4. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1; It is characterized in that: among the step B when the clock path of computing node; Link dedicated bandwidth mode to this clock path process is carried out mark, and calculates the load of link, carries out equilibrium.
5. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1 is characterized in that: further comprising the steps of among the step B: for the node that obtains active/standby clock source, the active clock source and the standby clock source of identification nodes respectively.
6. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1 is characterized in that: if having only an available clock source in the steps A in certain territory, then from adjacent territory, quote a clock source and come, as second clock source in this territory.
7. the synchronous planing method of nodal clock in the mesh network as claimed in claim 1 is characterized in that: when setting up network data in the steps A, through mutual with webmaster, obtain network data from webmaster, perhaps through graphical interfaces, manually set up network data.
8. the synchronous planing method of nodal clock in the mesh network as claimed in claim 7; It is characterized in that: carry out alternately through expandable mark language XML formatted file and webmaster; Perhaps directly mutual with webmaster through common object request broker interface, from webmaster acquisition network data.
9. like the synchronous planing method of nodal clock in each described mesh network in the claim 1 to 8; It is characterized in that: in the steps A for two available clock sources in each territory; Artificial specify a master clock source and one to be equipped with the clock source; The master clock information of all nodes all obtains from master clock source in the territory, and the clock information that is equipped with of all nodes all obtains from being equipped with the clock source.
10. like the synchronous planing method of nodal clock in each described mesh network in the claim 1 to 8; It is characterized in that: in the steps A for two available clock sources in each territory; Each node obtains active and standby clock information from two clock sources respectively according to the distance of node to two clock sources itself in the territory.
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| CN201210107090.5A CN102664700B (en) | 2012-04-13 | 2012-04-13 | Nodal clock synchronous planning method in mesh network |
| PCT/CN2012/079886 WO2013152569A1 (en) | 2012-04-13 | 2012-08-09 | Planning method for node clock synchronization in mesh network |
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| CN105634714A (en) * | 2014-10-28 | 2016-06-01 | 中兴通讯股份有限公司 | Cross-domain clock synchronization method, device thereof and cross-domain clock synchronization system |
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| CN103576542B (en) * | 2013-11-12 | 2016-02-03 | 成都泰富通信有限公司 | The high precision time dissemination system of the ground Big Dipper is used for based on ground fiber optic network |
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| CN103986791A (en) * | 2014-06-06 | 2014-08-13 | 浪潮电子信息产业股份有限公司 | Rapid internal cluster node time synchronization method |
| CN105634714A (en) * | 2014-10-28 | 2016-06-01 | 中兴通讯股份有限公司 | Cross-domain clock synchronization method, device thereof and cross-domain clock synchronization system |
| CN106357501A (en) * | 2015-07-16 | 2017-01-25 | 中国移动通信集团公司 | Intelligent clock planning configuration method, device and integrated controller |
| CN106936610B (en) * | 2015-12-30 | 2020-01-24 | 中国移动通信集团公司 | Network synchronization control method and device |
| CN106936610A (en) * | 2015-12-30 | 2017-07-07 | 中国移动通信集团公司 | A kind of network synchronous control method and device |
| CN106130682B (en) * | 2016-06-14 | 2018-05-08 | 河海大学 | The clock chain circuit planing method of plesiochronous network |
| CN105871496B (en) * | 2016-06-14 | 2017-12-08 | 河海大学 | A kind of synchronous optical network clock chain circuit planing method |
| CN106130682A (en) * | 2016-06-14 | 2016-11-16 | 河海大学 | The clock chain circuit planing method of plesiochronous network |
| CN105871496A (en) * | 2016-06-14 | 2016-08-17 | 河海大学 | Optical synchronous network clock link planning method |
| CN106549799A (en) * | 2016-10-19 | 2017-03-29 | 浙江工业大学 | A kind of synchronous implementation method of community network |
| CN106549799B (en) * | 2016-10-19 | 2019-04-23 | 浙江工业大学 | A kind of implementation method that community network is synchronous |
| CN112039694A (en) * | 2020-08-18 | 2020-12-04 | 烽火通信科技股份有限公司 | Clock configuration management method and device for communication network equipment |
| CN112039694B (en) * | 2020-08-18 | 2023-03-24 | 烽火通信科技股份有限公司 | Clock configuration management method and device for communication network equipment |
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| Publication number | Publication date |
|---|---|
| WO2013152569A1 (en) | 2013-10-17 |
| CN102664700B (en) | 2015-08-19 |
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