CN102098596A - Route establishing method and device in optical network - Google Patents
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Abstract
The invention provides a route establishing method and a route establishing device in an optical network. The method comprises the following steps that: a source node selects a destination path to a destination node according to resource information of the optical network and physical parameters corresponding to nodes in the optical network; and the source node transmits a route establishing signaling message to perform a signaling route establishing process on a control plane according to the destination path. The device comprises a selection module and a route establishing module, wherein the selection module is used for selecting the destination path to the destination node according to the resource information of the optical network and the physical parameters corresponding to the nodes in the optical network; and the route establishing module is used for transmitting the route establishing signaling message to perform the signaling route establishing process on the control plane according to the destination path. The technical scheme can improve the success rate of establishing a light path to the destination node according to the acquired destination path so as to improve the efficiency of establishing the light path to the destination node.
Description
Technical field
The present invention relates to the optical communication network technology, relate in particular to method for routing foundation and device in a kind of optical-fiber network.
Background technology
Optical transport network of future generation is to be the ASON of principal character with service-oriented, user oriented, mainly is made up of three planes: management plane, transmission plane and control plane.ASON has the intelligent feature that a series of traditional communication nets can't be realized, for example fastext assignment, protection recovery automatically, efficient resource distribution etc., and these functions depend on a powerful control plane.Some International Standards Organization are studied the control plane correlation technique at present, wherein, and ASON (Automatically Switched Optical Network; Abbreviate as: ASON) G.8080 framework has defined the main functional modules in the control plane, general multiple protocols label exchange (Generalized MultiProtocol Label Switching; Abbreviate as: GMPLS) system provides foundation for the specific implementation of control plane.
Wherein, management plane manages the overall optical network, and principal character is the distribution and the intellectuality of management function.Control plane is responsible for finishing functions such as business is set up end to end, business is removed, protection is switched by each node on it, and its main feature is the function that former cause centralized network tube apparatus is finished to be changed into by distributed node finish.Transmit the plane and form, be used to the information transfer channel end to end that provides unidirectional or two-way by a series of transmission entity; Transmit the plane and possess hierarchy, can support Technology of Multi-Granularity Optical Switching.
In the prior art, the professional flow process of setting up comprises: the source node on the control plane then, sends signaling message along the path hop-by-hop that calculates according to stored resource information calculations one paths; Intermediate node judges whether the resource of this node is sufficient after receiving signaling message; If the resource abundance is transmitted to next-hop node with signaling message behind the reserved resource; Behind control plane checking resource abundance and reserved resource, transmit the plane and set up light path along corresponding path.Wherein, because transmitting the plane is the actual physical network, can successfully set up business thereon, depend on not only whether resource is sufficient, therefore, in actual application, behind the sufficient also reserved resource of control plane checking resource, transmitting the plane often can't be successful when setting up light path, need return control plane and reselect a paths, and this success rate and efficient that makes light path set up is all lower.Prior art is reserved at the distributed resource of the control plane of ASON and has been proposed some technical schemes, but mainly is that it does not relate to the improvement project of setting up light path at the scheduling of resource (for example time slot or wavelength).
Summary of the invention
The invention provides method for routing foundation and device in a kind of optical-fiber network, set up the low and low problem of success rate of the efficient that exists in the process in order to solve the prior art light path, the efficient of light path and the success rate that light path is set up are set up in raising.
The invention provides method for routing foundation in a kind of optical-fiber network, comprising:
Source node is selected a destination path to destination node according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network;
Described source node sends the road construction signaling message to carry out signaling road construction process on control plane according to described destination path.
The invention provides route apparatus for establishing in a kind of optical-fiber network, comprising:
Select module, be used for resource information and each node corresponding physical parameter of described optical-fiber network, select a destination path to destination node according to optical-fiber network;
The road construction module is used for according to described destination path, sends the road construction signaling message to carry out signaling road construction process on control plane.
Method for routing foundation and device in the optical-fiber network provided by the invention, while is in conjunction with resource information and each node corresponding physical parameter of optical-fiber network, choose the destination path of destination node, send the road construction signaling message to carry out signaling road construction process according to destination path.Technical solution of the present invention is because when getting access to the destination path of destination node, considered each node corresponding physical parameter, improved according to the destination path that obtains and be established to the success rate of the light path of destination node, and then improved the efficient of the light path that is established to destination node.
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 one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below 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 flow chart of method for routing foundation in the optical-fiber network that Fig. 1 provides for the embodiment of the invention one;
The flow chart of method for routing foundation in the optical-fiber network that Fig. 2 provides for the embodiment of the invention two;
The structural representation that Fig. 3 A provides for the embodiment of the invention three based on the optical-fiber network of Optical Signal To Noise Ratio;
The flow chart of method for routing foundation in the optical-fiber network that Fig. 3 B provides for the embodiment of the invention three;
The structural representation of route apparatus for establishing in the optical-fiber network that Fig. 4 provides for the embodiment of the invention four;
The structural representation of route apparatus for establishing in the optical-fiber network that Fig. 5 provides for the embodiment of the invention five.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment 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 is obtained under the creative work prerequisite.
Set up in the process at light path, can successfully set up light path on the transmission plane and depend on not only whether resource is enough, also depend on various relevant physical parameters, have only after resource and relevant physical parameter all meet the demands, light path can really be set up success, and prior art has only been considered resource problem, do not consider the influence that relevant physical parameter is set up light path, therefore, it is lower to exist light path to be created as power, the problem that efficient is lower, based on this, following examples of the present invention provide a kind of and consider that simultaneously resource and relevant physical parameter carry out the technical scheme that light path is set up.
The flow chart of method for routing foundation in the optical-fiber network that Fig. 1 provides for the embodiment of the invention one.As shown in Figure 1, the method for present embodiment comprises:
Wherein, the resource information of having preserved current optical-fiber network in each node of optical-fiber network, the form with LSD on each node is stored.In addition, each node also can be stored each node corresponding physical parameter in the current optical-fiber network, and wherein, each node corresponding physical parameter can be the physical parameter of each node itself, also can be the physical parameter of the link that is connected with node.Wherein, each node corresponding physical parameter can be wherein any one or its combination such as Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion, decay or input and output power.Wherein, physical parameter is not limited to above-mentioned listed enumerating, and can be any physical parameter of light path being set up influential transmission plane.
In the present embodiment, set in advance judgment condition on each node in the optical-fiber network, this judgment condition is used for judging in signaling road construction process whether physical parameter is qualified for node.Concrete, source node (belonging in above-mentioned each node) calculates a destination path to destination node according to resource information, each node corresponding physical parameter and the pre-configured judgment condition of preserving.Each node corresponding physical parameter on this destination path satisfies pre-configured judgment condition, and for example Optical Signal To Noise Ratio is greater than default snr threshold, and dispersion values is less than default chromatic dispersion threshold value etc.
Concrete, signaling road construction process comprises: source node is to the decision operation of destination node: source node is after calculating the destination path of destination node, according to the destination path that calculates each node hop-by-hop transmission road construction signaling message on this destination path; For the arbitrary node on this destination path, when receiving the road construction signaling message, judge mainly whether the resource of this node is sufficient, and under the situation of resource abundance, transmit the road construction signaling message to next node.
Destination node is to the operation of the resource reservation of source node: when destination node receives the road construction signaling message, and send RSVP message along destination path to source node when resource is sufficient, so that the node on the destination path carries out resource reservation; For the arbitrary node on this destination path, carry out resource reservation according to the RSVP message that receives, and give next node on this direction the RSVP forwards; When source node receives RSVP message, illustrate and on control plane, set up the light path of source node to destination node.
Wherein, in decision operation, when node is judged inadequate resource, perhaps in the resource reservation operation, node judges that can't reserved resource the time, node can be according to the signaling mechanism of turning back to source node return node thrashing message, so that source node is reselected destination path.
Method for routing foundation in the optical-fiber network of present embodiment, while is in conjunction with resource information and each node corresponding physical parameter of optical-fiber network, choose the destination path of destination node, on control plane, carry out signaling road construction process according to selected destination path, for the light path that is established to destination node on the transmission plane is done the basis.Present embodiment is because when getting access to the destination path of destination node, considered each node corresponding physical parameter, in the signaling road construction process of control plane, the physical parameter that transmits the plane is considered, improved after control plane carries out signaling road construction success, be established to the success rate of the light path of destination node on the transmission plane, and then improved the efficient of the light path that is established to destination node.
The flow chart of method for routing foundation in the optical-fiber network that Fig. 2 provides for the embodiment of the invention two.Present embodiment realizes that based on embodiment one something in common of present embodiment and embodiment one repeats no more, and as shown in Figure 2, the method for present embodiment comprises:
Concrete, this step 20 comprises: step 201, each node obtain this node corresponding physical parameter at control plane, for example: Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion, attenuation or input and output power etc.In the present embodiment, each node can be considered as being made of the node two parts on the node of control plane and transmission plane, and the node on the node of control plane and transmission plane is integrated on the equipment usually, but is not limited to this.Each node is specifically collected relevant physical parameter by the node of its control plane according to the physical parameter information that the node that transmits the plane reports, and also can collect relevant physical parameter by the transducer that is arranged on the node that transmits the plane by the node of its control plane.
Step 202, each node flood physical parameter in the optical-fiber network of place;
Each node floods physical parameter after collecting relevant physical parameter in the optical-fiber network of place.Wherein, the principle that floods is: if the message that floods that node receives is the content that node does not upgrade, the message that then will flood after this content of node updates is transmitted to all of the port; If the message that floods that node receives is the content that this node has upgraded, then node is no longer transmitted this updating message.In the present embodiment, this node corresponding physical parameter that message is meant that each node is collected that floods.By flooding, each node can be preserved the relevant physical parameter of each node in the overall optical network in the optical-fiber network.
In the present embodiment, flooding of physical parameter can be by ospf (the Open Shortest Path First-Traffic Engineering of band traffic engineering; Abbreviate as: OSPF-TE) Routing Protocol carries out.Though these physical parameters are not definition in the OSPF-TE consensus standard, but because the OSPF-TE agreement is an extendible agreement, and this OSPF-TE agreement regulation: can new parameter be flooded by Sub-TLV (Type/Length/Value) structure of expansion.Sub-TLV is the minor structure form of a standard of OSPF-TE agreement, is mainly used to store the new data that flood, and Sub-TLV can level be associated in the OSPF-TE agreement.In the present embodiment, can set different type (type) values, the value of physical parameter is filled out in value (Value) field, form newly-increased TLV for dissimilar physical parameters; Then newly-increased TLV level is associated in the OSPF-TE protocol package and floods.The expansion content of relevant more Sub-TLV can see (the Generalized Multi-Protocol Label Switching of general multiple protocols sign exchange agreement among the IETF RFC4203 for details; Abbreviate as: description GMPLS) is not described in detail at this.
Wherein, sex-limited when each node corresponding physical parameter has in optical-fiber network, therefore, each node can periodically obtain pairing physical parameter in the present embodiment, and periodically floods; Cycle or the frequency of wherein obtaining physical parameter can preestablish, and this present embodiment is not done qualification.In addition, except periodically obtaining the relevant physical parameter, can also before execution in step 21, obtain up-to-date, real-time physical parameter by the special operation of obtaining.Be that step 20 specifically is periodically to obtain physical parameter or obtain physical parameter by the special operation of obtaining, present embodiment is not done qualification.
Step 203, source node receive the physical parameter that each node sends in the mode of flooding.
Wherein, source node receives the physical parameter that other nodes send by the OSPF-TE agreement.
In the present embodiment, step 21 can adopt but be not limited to following execution mode and realize that this execution mode comprises:
Step 210, source node obtain first path according to optical network resource information;
Wherein, in optical-fiber network, certain bar link changes in network, also can notify nodes all in the optical-fiber network with change information by flooding mechanism, and this change information mainly comprises the resource information of each node that relates to.Based on this, preserved the resource information in the current optical-fiber network on the source node, for example wavelength resource, time interval resource etc.
Concrete, source node calculates a path to destination node according to the network resource information of preserving, and is called first path in the present embodiment, comprises one or more intermediate nodes that lead to destination node on this first path.
Step 211, source node judge whether the node corresponding physical parameter on first path satisfies default judgment condition; If judged result is for being execution in step 212; Otherwise, execution in step 210.
Set up in the process of light path in order to make in the transmission aspect, the physical parameter of the inbound port of each node and outbound port can satisfy the needs that light path is set up on the path, the source node of present embodiment is after calculating first path, each node corresponding physical parameter and predefined judgment condition on first path are compared, on the control plane physical parameter that transmits on the plane is being judged.Wherein, judgment condition can be the threshold value of respective physical parameter in national standard, the industry standard, also can be the empirical value of respective physical parameter sanctified by usage.In addition, the grade of service difference of different business, therefore, judgment condition also can be the decision threshold according to the parameter of respective physical end to end of certain grade of service setting.In the present embodiment, physical parameter is judged the judgment condition of usefulness can be made an appointment, also can be carried real-time Transmission by the signaling of expansion.Each node of finger the whole network of making an appointment is made an appointment and all by certain judgment condition physical parameter is adjudicated when receiving the road construction signaling fortunately, and the road construction signaling of receiving is not done differentiation.Carrying real-time Transmission by expanded signalling is meant, for each bar business, comprised judgment condition in the road construction signaling message that source node sends when carrying out the signaling road construction, this judgment condition passes to downstream node (being each node on the destination path) with road construction signaling message hop-by-hop, for downstream node to its corresponding physical parameter being judged according to this judgment condition, this mode helps business dissimilar, different priorities is used different judgment condition, and flexibility is stronger.
Wherein, when each node corresponding physical parameter satisfies default judgment condition, with this first path as to the destination path of destination node, when follow-up according to this destination path signaling road construction when success on control plane, influence in the time of can reducing physical parameter to the road construction of transmission plane has improved the success rate that transmits the plane road construction; Otherwise, change and go step 210, promptly calculate first a new path according to the resource information of preserving again, and continue to carry out subsequent operation.
Step 212, source node determine that first path is the destination path to destination node;
Be about to first path as path to destination node.When the control plane road construction is successful, reducing physical parameter to the influence when transmitting the plane road construction, improve the success rate when transmitting the plane road construction like this based on this destination path.
In the present embodiment, step 22 can adopt but be not limited to following execution mode, and this execution mode comprises:
Step 221, the source node first node on destination path sends the road construction signaling message;
Wherein, first node is meant present node, and it can be any one node (except that source node) to the destination path of destination node.Wherein, when first node was first node on the destination path, source node sent road construction signaling message at control plane to this first node, to carry out signaling road construction process; When first node was other nodes except that first node, this first node received by road construction signaling message from source node that node is transmitted on it.Comprise node on the address information, resource information, destination path of source node, destination node and binding information of port (for example inbound port, outbound port) etc. in this road construction signaling message.Wherein, when in the overall optical network of having made an appointment during employed physical parameter, this road construction signaling message can adopt road construction signaling message of the prior art, and each node carries out respective handling to whole physical parameters of making an appointment.In addition, if do not make an appointment during the employed physical parameter of optical-fiber network, the source node of present embodiment can carry the physics parameter information by some fields in this road construction signaling message, informing that each node is used for selecting the employed physical parameter of destination path on the destination path, and each node is handled to the respective physical parameter.
Step 222, first node judge according to the road construction signaling message whether the resource of this node is sufficient; If judged result is for being that then execution in step 223; Otherwise, execution in step 225;
Wherein, if the resource abundance of this node illustrates that professional required resource is enough; Otherwise, illustrate that professional required resource is inadequate, the signaling road construction failure of control plane.
Step 223, first node judge whether this node corresponding physical parameter satisfies default judgment condition; If judged result is for being, promptly the physical parameter of this node satisfies and presets judgment condition, and then execution in step 224; Otherwise, execution in step 21.
Wherein, when judged result when being, explanation is set up in the process this business, this node satisfies the needs that the light path of this business correspondence is set up in the physical parameter of the physical parameter of the inbound port that transmits the plane and outbound port, satisfy national standard, industry standard or empirical value sanctified by usage, also illustrate on a last jumping link and not only on control plane, can set up path, on the transmission plane, also can successfully set up light path for this business for this business.When judged result for not the time, illustrate that professional required resource is enough, can on control plane, set up path for this business, but it transmits physical parameter relevant on the plane, for example Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion attenuation or input and output power etc., or other physical parameter can't satisfy this business in the demand of setting up that transmits on the plane.Because the foundation of light path is actually in the foundation that transmits on the plane, therefore in this case, light path is set up and is failed, and needs control plane to adopt the signaling mechanism of turning back to recomputate a new path by source node, to carry out signaling road construction process again.
Step 224, first node are transmitted the next node that is given on the destination path with the road construction signaling message, so that next node carries out and the first node identical operations according to the road construction signaling message, and till destination node, and execution in step 226;
Concrete, when first node is judged this node and satisfied the resource requirement that transmitting when setting up light path on the plane and physical parameter demand simultaneously, the road construction signaling message is transmitted to next node.Wherein, the operation of next node is identical with the operation of first node, till signaling is forwarded to destination node, and execution in step 226.
Step 225, to source node return node thrashing message, and trigger source node execution in step 21;
In step 225, can be first node return node thrashing message, also can be other nodes to the destination path return.
Step 226, destination node are returned RSVP message along destination path to source node, and carry out resource reservation, to finish the signaling road construction process on control plane.
Wherein, in this step 226, each node on the destination path carries out resource reservation according to RSVP message, and transmits the next node that RSVP message is given this direction.On control plane,, promptly on resource database, respective resources is labeled as reservation state with resource reservation.In addition, when node correctly during reserved resource, also can be according to the signaling mechanism of turning back to source node return node thrashing message.
When RSVP message arrives source node, mean and on control plane, set up a virtual link, each node on the control plane has been reserved resource for virtual link, i.e. and the signaling road construction at control plane finishes.At this moment, source node will send the resource reservation acknowledge message to destination node along destination path, receive that the node control of the control plane of this message transmits the node on plane accordingly, take reserved resource, set up the light path that transmits the plane, promptly from physically being established to the light path of destination node.
Wherein, adopt flooding mechanism that physical parameter is carried out the synchronous of overall optical network in the present embodiment, but may mistake appear because of link failure etc. in the process that floods, also may the physical parameter of corresponding physical parameter when flooding when receiving the road construction signaling message be no longer consistent because the timing mechanism that floods makes each node, therefore, present embodiment is judged the physical parameter that transmits on the plane by each node on the direction of destination node at source node, can prevent to occur the situation that physical parameter wrong or that the timing mechanism that floods causes changes in the process of flooding, further improve the success rate that transmits the plane road construction.
In this explanation, in the above-described embodiments, node on the destination path is to judge that whether sufficient resource judge physical parameter in, the decision operation that is equivalent to physical parameter is to carry out along the direction from the source node to the destination node, this execution mode is a kind of optimal way, but is not limited to this.For example: the node on the destination path can also judge to physical parameter when carrying out resource reservation that the decision operation that is equivalent to physical parameter is to carry out along the direction from the destination node to the source node.Wherein, on the destination path that those skilled in the art provide in conjunction with present embodiment each node on from source node to the destination node direction to the decision operation of physical parameter, be appreciated that and can implement each node from destination node to the source node direction on to the decision operation of physical parameter, so be not described in detail in this.
Method for routing foundation in the optical-fiber network of present embodiment, each node by control plane is collected relevant physical parameter, the physical parameter of collecting floods in the whole network, and in the signaling road construction, the physical parameter of collecting is adjudicated, realized in the road construction process of control plane, the physical parameter that transmits the plane being judged, thereby when having guaranteed that resource is enough set up business on control plane, guarantee on the transmission plane, also can set up professional corresponding light path, thereby avoided professional in road construction success on the control plane but transmitting the unsuccessful situation of road construction on the plane, improved professional success rate, and then improved professional in the efficient that transmits the plane road construction in transmission plane road construction.
The structural representation that Fig. 3 A provides for the embodiment of the invention three based on the optical-fiber network of Optical Signal To Noise Ratio.The flow chart of method for routing foundation in the optical-fiber network that Fig. 3 B provides for the embodiment of the invention three.In the topology shown in present embodiment Fig. 3 A, suppose that professional reserved resource is the 1st wavelength, on the 1st wavelength, each node go into the Optical Signal To Noise Ratio difference.In node 2 uplink＜1,2〉on the Optical Signal To Noise Ratio of going into of the 1st wavelength be 22dB; In node 3 uplink＜2,3〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 20dB; In node 5 uplink＜3,5〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 18dB; In node 4 uplink＜1,4〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 21dB; In node 5 uplink＜4,5〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 17dB; In node 3 uplink＜1,3〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 17dB; In node 4 uplink＜2,4〉the Optical Signal To Noise Ratio of going into of the 1st wavelength be 16dB.And hypothesis will be from node 1 to node 5 be set up a light path in the present embodiment.
If only consider whether resource is enough, do not consider whether the Optical Signal To Noise Ratio that transmits the plane meets the demands, and then source node can calculate four light pathes according to occupation condition: the having of double bounce: node 1-node 4-node 5 and node 1-node 3-node 5; Having of three jumpings: node 1-node 2-node 3-node 5 and node 1-node 2-node 4-node 5.Whether do not meet the demands if do not consider the Optical Signal To Noise Ratio that transmits the plane, acquiescence, suppose to select the path of double bounce: node 1-node 4-node 5 if selecting the path of minimum hop count.When on control plane, setting up the path, reserved the resource of the 1st wavelength by signaling.The path of setting up according to control plane on the transmission plane takies wavelength resource on the 1st wavelength of node 1-node 4-node 5 afterwards, and the transmission data are set up light path.Yet, according to national standard or industry standard, transmit and internodally on the plane to go into Optical Signal To Noise Ratio and be correlated with, satisfy certain condition go into that Optical Signal To Noise Ratio is professional could be actual open-minded.In the present embodiment, suppose that judgment condition is to be not less than 18dB into Optical Signal To Noise Ratio.If control plane does not consider to transmit the physical parameter judgment condition on plane, though on control plane, set up the path be: node 1-node 4-node 5, wavelength is the connection of the 1st wavelength, when transmitting the plane road construction, because in node 5 uplink＜4, the Optical Signal To Noise Ratio of going into of the 1st wavelength 5〉is 17dB, the Optical Signal To Noise Ratio of going into that does not satisfy more than or equal to 18dB limits, then can't set up at the 1st wavelength that transmits node 4-node 5 on the plane, the light path of the 1st wavelength of the node 1-node of having set up 4 also will be dismantled again, carries out road construction again.
If consider not only whether resource is enough, also considered to transmit the correlation circumstance of the physical parameter Optical Signal To Noise Ratio on plane, then have only a node 1-node 2-node 3-node 5 can satisfy the requirement of physical parameter Optical Signal To Noise Ratio in four light pathes.Based on this, the method for routing foundation of present embodiment comprises shown in Fig. 3 B:
Each node of step 31, control plane is collected into Optical Signal To Noise Ratio, and the Optical Signal To Noise Ratio of collecting of going into floods in the whole network.
In the present embodiment, 5 nodes of control plane are collected the relevant physical parameter that transmits planes, and promptly each each wavelength of node goes into Optical Signal To Noise Ratio.Going into Optical Signal To Noise Ratio can be reported by the node that transmits the plane, also can generate data by transducer.Going into Optical Signal To Noise Ratio is a variable, the renewal of can periodically collecting and flood.
Step 32, node 1 calculating path, and after calculating the path, send the road construction signaling message according to the node of path on the path; Node 1 considers that simultaneously the path that the Optical Signal To Noise Ratio on resource information and transmission plane calculates is: node 1-node 2-node 3-node 5 in the present embodiment.
Step 33, in signaling road construction process, node is judging that whether enough resource adjudicate going into Optical Signal To Noise Ratio at default judgment condition in.Though node 1 when calculating path the Optical Signal To Noise Ratio to the whole network adjudicate, but since node 1 when being used for the Optical Signal To Noise Ratio of calculating path and signaling road construction process the Optical Signal To Noise Ratio life period of each node poor, in order to prevent to cause road construction unsuccessful because of the Optical Signal To Noise Ratio of some node changes factor such as very fast, present embodiment is by in signaling road construction process, adjudicate going into Optical Signal To Noise Ratio by each node on the path, set up the success rate of light path with further raising.Wherein, when resource satisfies, and go into the Optical Signal To Noise Ratio judgement and pass through execution in step 34; If resource satisfies, do not pass through and go into the Optical Signal To Noise Ratio judgement, when perhaps resource does not satisfy, execution in step 35.
Step 34, signaling continue to the next-hop node transmission, and execution in step 33;
Step 32 is returned in step 35, road construction failure, promptly triggers node 1 and recomputates the path.
In the present embodiment, judgment condition is set to be not less than 18dB into Optical Signal To Noise Ratio.
Present embodiment is collected into Optical Signal To Noise Ratio information by each node of control plane, and in the signaling road construction, go into Optical Signal To Noise Ratio and whether adjudicate more than or equal to 18dB to what collect, realized in control plane signaling road construction process, judging to going into Optical Signal To Noise Ratio, when guaranteeing that resource is enough set up business on control plane, guarantee on the transmission plane, also can set up professional corresponding light path, avoided professional in road construction success on the control plane but transmitting the unsuccessful situation of road construction on the plane, improve the success rate of professional road construction, and then improved the efficient of professional road construction.
The structural representation of route apparatus for establishing in the optical-fiber network that Fig. 4 provides for the embodiment of the invention four.As shown in Figure 4, the device of present embodiment comprises: select module 41 and road construction module 42.
Above-mentioned each functional module can be used for carrying out the flow process of method for routing foundation in the optical-fiber network that said method embodiment provides, and its operation principle sees the description of method embodiment for details, does not repeat them here.
Route apparatus for establishing in the optical-fiber network of present embodiment, while is in conjunction with resource information and each node corresponding physical parameter of optical-fiber network, choose the destination path of destination node, on control plane, carry out signaling road construction process according to selected destination path, for the light path that is established to destination node on the transmission plane is done the basis.The device of present embodiment is when obtaining destination path, considered each node corresponding physical parameter, in the signaling road construction process of control plane, the physical parameter that transmits the plane is considered, improved after control plane carries out signaling road construction success, be established to the success rate of the light path of destination node on the transmission plane, and then improved the efficient of the light path that is established to destination node.
The structural representation of route apparatus for establishing in the optical-fiber network that Fig. 5 provides for the embodiment of the invention five.Present embodiment realizes that based on the foregoing description as shown in Figure 5, the device of present embodiment also comprises: acquisition module 51.
Acquisition module 51 is connected with selecting module 41, is used for obtaining the physical parameter of each node before selecting module selection destination path.Concrete, in optical-fiber network, each node obtains this node corresponding physical parameter, then physical parameter is flooded in the overall optical network, and then this acquisition module 51 specifically is used to receive physical parameter that each node obtains and that send in the mode of flooding.
Wherein, acquisition module can be used for carrying out the corresponding flow process of obtaining physical parameter among the said method embodiment, and its operation principle sees the description of method embodiment for details, does not repeat them here.
Route apparatus for establishing in the optical-fiber network of present embodiment can obtain each node corresponding physical parameter by acquisition module, selects destination path to lay the foundation for selecting module according to physical parameter.
Further, a kind of implementation structure of the selection module 41 of present embodiment comprises: acquiring unit 411, judging unit 412, determining unit 413 and trigger element 414.
Concrete, acquiring unit 411 is used for the resource information according to optical-fiber network, obtains first path; Judging unit 412 is connected with acquiring unit 411, is used to judge whether the node corresponding physical parameter on first path satisfies default judgment condition; Determining unit 413 is connected with judging unit 412, is used in the judged result of judging unit 412 determining that first path is a destination path when being; Trigger element 414 is connected with judging unit 412, is used in the judged result of judging unit 412 triggering the resource information that acquiring unit 411 is carried out according to optical-fiber network for not the time, obtains the operation in first path.
Above-mentioned each functional unit can be used for carrying out the detailed process that obtains destination path among the said method embodiment, and its operation principle sees the description of method embodiment for details, does not repeat them here.
Further, a kind of implementation structure of the road construction module 42 of present embodiment comprises: transmitting element 421 and receiving element 422.
Concrete, transmitting element 421, respectively with optical-fiber network in each node (not shown) be connected with determining unit 413, be used for sending the road construction signaling message along the first node of destination path on destination path that determining unit 413 is determined, judge that according to the road construction signaling message resource of this node is whether sufficient and judge whether corresponding physical parameter satisfies default judgment condition for first node, and in resource return node thrashing message when inadequate or physical parameter does not satisfy default judgment condition, or when resource abundance and physical parameter satisfy default judgment condition, will state the road construction signaling message and be transmitted to next node on the destination path; Receiving element 422, be connected with selection module 41 with each the node (not shown) in the optical-fiber network, be used for the receiving node thrashing message, re-execute according to each node corresponding physical parameter in the resource information of optical-fiber network and the optical-fiber network with triggering selection module 41, select a operation to the destination path of destination node.
A kind of implementation of the road construction module that above-mentioned each functional unit is a present embodiment but be not limited to this, above-mentioned each functional unit can be used for carrying out the detailed process of signaling road construction process among the said method embodiment, its operation principle sees the description of method embodiment for details, does not repeat them here.
Further, in the various embodiments described above, each node corresponding physical parameter can be wherein any one or its combination such as Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion, attenuation or input and output power, in addition, the physical parameter of other any influences transmission plane road construction processes all is applicable to the various embodiments described above.
In sum, route apparatus for establishing in the optical-fiber network of present embodiment, each node by control plane is collected relevant physical parameter, the physical parameter of collecting floods in the whole network, and in the signaling road construction, the physical parameter of collecting is adjudicated, realized in the road construction process of control plane, the physical parameter that transmits the plane being judged, thereby when having guaranteed that resource is enough set up business on control plane, guarantee on the transmission plane, also can set up professional corresponding light path, thereby avoided professional in road construction success on the control plane but transmitting the unsuccessful situation of road construction on the plane, improved professional success rate, and then improved professional in the efficient that transmits the plane road construction in transmission plane road construction.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. method for routing foundation in the optical-fiber network is characterized in that, comprising:
Source node is selected a destination path to destination node according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network;
Described source node sends the road construction signaling message to carry out signaling road construction process on control plane according to described destination path.
2. method for routing foundation in the optical-fiber network according to claim 1, it is characterized in that, described source node according to the resource information of optical-fiber network and described optical-fiber network in each node corresponding physical parameter, select one before the destination path of destination node, also to comprise:
Described source node obtains described each node corresponding physical parameter.
3. method for routing foundation in the optical-fiber network according to claim 2 is characterized in that, described source node obtains described each node corresponding physical parameter and comprises:
Described each node obtains this node corresponding physical parameter, and described physical parameter is flooded in described optical-fiber network;
Described source node receives the physical parameter that described each node sends in the mode of flooding.
4. according to method for routing foundation in claim 1 or the 2 or 3 described optical-fiber networks, it is characterized in that, described source node selects the destination path to destination node to comprise according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network:
Described source node obtains first path according to the resource information of described optical-fiber network;
Described source node judges whether the node corresponding physical parameter on described first path satisfies default judgment condition;
If judged result is for being that described source node determines that described first path is described destination path;
If judged result is that described source node does not return the resource information of execution according to described optical-fiber network, obtains the operation in first path.
5. according to method for routing foundation in claim 1 or the 2 or 3 described optical-fiber networks, it is characterized in that described source node sends the road construction signaling message and comprises to carry out signaling road construction process on control plane according to described destination path:
Described source node sends described road construction signaling message along the first node of described destination path on described destination path;
Described first node judges according to described road construction signaling message whether the resource of this node is sufficient;
If judged result is that resource is inadequate, described first node is to described source node return node thrashing message, so that described source node re-executes according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network, select a operation to the destination path of destination node;
If judged result is the resource abundance, described first node judges whether this node corresponding physical parameter satisfies default judgment condition;
If judged result is not for satisfying default judgment condition, described first node is to described source node return node thrashing message, so that described source node re-executes according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network, select a operation to the destination path of destination node;
If judged result is for satisfying default judgment condition, described first node is transmitted to next node on the described destination path with described road construction signaling message, so that described next node is according to described road construction signaling message execution and described first node identical operations, till described destination node.
6. according to method for routing foundation in claim 1 or the 2 or 3 described optical-fiber networks, it is characterized in that described each node corresponding physical parameter comprises following any one or its combination: Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion, attenuation or input and output power.
7. route apparatus for establishing in the optical-fiber network is characterized in that, comprising:
Select module, be used for resource information and each node corresponding physical parameter of described optical-fiber network, select a destination path to destination node according to optical-fiber network;
The road construction module is used for according to described destination path, sends the road construction signaling message to carry out signaling road construction process on control plane.
8. route apparatus for establishing in the optical-fiber network according to claim 7 is characterized in that, also comprises:
Acquisition module was used for before described selection module is selected described destination path, obtained described each node corresponding physical parameter.
9. route apparatus for establishing in the smooth networking according to claim 8 is characterized in that, described acquisition module specifically is used to receive physical parameter that described each node obtains and that send in the mode of flooding.
10. according to route apparatus for establishing in claim 7 or the 8 or 9 described optical-fiber networks, it is characterized in that described selection module comprises:
Acquiring unit is used for the resource information according to described optical-fiber network, obtains first path;
Judging unit is used to judge whether the node corresponding physical parameter on described first path satisfies default judgment condition;
Determining unit is used in the judged result of described judging unit determining that described first path is described destination path when being;
Trigger element is used in the judged result of described judging unit for not the time, triggers described acquiring unit and carries out resource information according to described optical-fiber network, obtains the operation in first path.
11., it is characterized in that described road construction module comprises according to route apparatus for establishing in claim 7 or the 8 or 9 described optical-fiber networks:
Transmitting element, be used for sending described road construction signaling message along the first node of described destination path on described destination path, judge that according to described road construction signaling message the resource of this node is whether sufficient and judge whether corresponding physical parameter satisfies default judgment condition for described first node, and when the inadequate or described physical parameter of resource does not satisfy default judgment condition the return node thrashing message, or described road construction signaling message is transmitted to when sufficient and described physical parameter satisfies default judgment condition next node on the described destination path in resource;
Receiving element is used to receive described node failure message, re-executes according to each node corresponding physical parameter in the resource information of optical-fiber network and the described optical-fiber network to trigger described selection module, selects an operation to the destination path of destination node.
12. according to route apparatus for establishing in claim 7 or the 8 or 9 described optical-fiber networks, it is characterized in that described each node corresponding physical parameter comprises following any one or its combination: Optical Signal To Noise Ratio, the error rate, chromatic dispersion, polarization mode dispersion, attenuation or input and output power.
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| CN107948766A (en) * | 2017-11-16 | 2018-04-20 | 北京邮电大学 | Routing optimization method and apparatus |
| CN110912821A (en) * | 2019-11-01 | 2020-03-24 | 中国联合网络通信集团有限公司 | Route distribution method and device |
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