CN101677294B - Multilayer network resource optimization method, system and direct optical path server - Google Patents
Multilayer network resource optimization method, system and direct optical path server Download PDFInfo
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Abstract
The embodiment of the invention discloses a multilayer network resource optimization method, system and direct optical path server. The multilayer network resource optimization method includes: the direct optical path server receiving the attribute information of the label switched path of the upper layer in the multilayer network; counting the network flow between the of the upper layer in the multilayer network according to the attribute information; the direct optical path server selecting the target node pairs from the node pairs on the basis of the network flow and the preconfigured strategy information; and the direct optical path server driving the adjustment of the direct optical path between the target node pairs. The direct optical path server includes a receiving modular, a counting modular, a selecting modular and a optimizing modular. The multilayer network resource optimization system includes multilayer of network and a direct optical path server. The embodiment of the invention resolves the accurate statistical problem of network flow between two points, and solves the dynamic configuration problem of multilayer network resource from overall situation point.
Description
Technical field
The present invention relates to communication network technology, relate in particular to a kind of multilayer network resource optimization method, system and direct optical path server.
Background technology
The structure of communication network adopts the layering form usually; At present modal be with Internet Protocol (Internet Protocol, IP) layer or multi protocol label exchange (Multi-Protocol LabelSwitching, MPLS) layer is as the upper strata; SDH (Synchronous DigitalHierarchy; SDH) layer or optical channel data cell (Optical Channel Data Unit, ODU) layer is as lower floor, orlop adopts the wavelength channel layer.The difference in functionality that the network configuration of this layer-stepping utilizes different layers to provide has improved the overall efficacy of communication network; But when the traffic engineering of link is provided; The path of total optimization then can not be provided from the angle calculation optimal path of individual layer; Therefore, (Multi-layer Traffic Engineering's multilayer traffic engineering MTE) arises at the historic moment.The multilayer traffic engineering is intended to optimize multitiered network, and the optimal path of multitiered network is provided, and setting up direct optical path (Bypass) is a kind of technology in the multilayer traffic engineering, and the flow that can solve between multitiered network is dredged problem.Yet, because the no connection performance of IP network layer is difficult to the network traffics of any point-to-point transmission of statistics, and can not can not solves the dynamic-configuration problem of multilayer network resource from overall angle from the optimum consideration of the angle direct optical path point of the whole network.
There are two technical schemes that solve the problems of the technologies described above in the prior art.One of them scheme is to adopt virtual topology manager (Virtual Network Topology Manager; VNTM); Establishment and issue to lower floor's light path or virtual link drive, and the configuration control strategy etc., influence upper layer network through issuing down etale topology.But VNTM lacks the effective means of control upper strata change in topology, and, because foundation, the deletion of link cause reaction speed very slow.Another scheme is to adopt IP optical-fiber network traffic engineering server (IP OPTICAL TE SERVER) to come unified management and control IP network layer and optical-fiber network layer; This method is monitoring traffic in network accurately, and the shortest path pass-through mode of IP network causes behind newly-increased direct optical path, can attracting other flows.In addition; Because IP OPTICAL TE SERVER has multiple functions such as multitiered network planning, path-calculating element, path status maintenance, the network optimization, network management; Complexity is high, and maintenance state is many, in case IP OPTICAL TE SERVER breaks down; Then will produce catastrophic effect, so the reliability of network is very low to whole network.
Summary of the invention
The embodiment of the invention is to provide a kind of multilayer network resource optimization method, system and direct optical path server, in global scope, realizes the dynamic-configuration of multilayer network resource.
To achieve these goals, the embodiment of the invention provides a kind of multilayer network resource optimization method, comprising:
Direct optical path server receives the attribute information of the label switched path of the upper layer network in the multitiered network;
Said direct optical path server is according to said attribute information, add up node in the label switched path of said upper layer network between network traffics;
Said direct optical path server is right at said node centering select target node according to said network traffics and pre-configured policy information;
The said destination node of said direct optical path server driving between the adjustment of direct optical path;
Said direct optical path server according to said network traffics and pre-configured policy information at said node centering select target node to comprising:
When comprising under the preset network traffics, said pre-configured policy information prescribes a time limit; Said direct optical path server judge adjacent node between network traffics whether less than preset network traffics lower limit; If, then confirm said adjacent node to for the both candidate nodes of waiting to delete direct optical path right; Said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
When comprising on the preset network traffics, said pre-configured policy information prescribes a time limit; Said direct optical path server judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit; If, then confirm said nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right; Said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Said direct optical path server is right at said both candidate nodes centering select target node.
The embodiment of the invention also provides a kind of direct optical path server, comprising:
Receiver module is used for receiving the attribute information of label switched path of the upper layer network of multitiered network;
Statistical module is used for the said attribute information that receives according to said receiver module, add up node in the label switched path of said upper layer network between network traffics;
Select module, said network traffics that are used for obtaining according to said statistical module counts and pre-configured policy information are right at said node centering select target node;
Optimal module, be used to drive said destination node between the adjustment of direct optical path;
Wherein, said selection module comprises:
First judging unit, be used to judge adjacent node between network traffics whether less than preset network traffics lower limit, said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
Second judging unit, be used to judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit, said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Confirm the unit, be used for confirming that according to the judged result of said first judging unit or second judging unit both candidate nodes of direct optical path to be adjusted is right;
Selected cell, it is right to be used at said both candidate nodes centering select target node.
The present invention also provides a kind of multilayer network resource optimization system; Comprise multitiered network and direct optical path server; Said direct optical path server is used for receiving the attribute information of label switched path of the upper layer network of multitiered network; According to said attribute information; Add up node in the label switched path of said upper layer network between network traffics, right according to said network traffics and pre-configured policy information at said node centering select target node, and drive said destination node between the adjustment of direct optical path;
Wherein, said according to said network traffics and pre-configured policy information at said node centering select target node to comprising:
When said pre-configured policy information comprises under the preset network traffics in limited time, judge adjacent node between network traffics whether less than preset network traffics lower limit, if confirm that then said adjacent node is to being that to wait to delete the both candidate nodes of direct optical path right; Said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
When comprising on the preset network traffics, said pre-configured policy information prescribes a time limit; Judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit; If, then confirm said nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right; Said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Right at said both candidate nodes centering select target node.
A kind of multilayer network resource optimization method provided by the invention, system and direct optical path server; Through setting up direct optical path server; By direct optical path server the right network traffics of node in each label switched path of upper layer network are added up; And according to the statistics network traffics and pre-configured strategy carry out the foundation or the deletion of direct optical path, solved the precise statistics problem of point-to-point transmission network traffics, solved the dynamic-configuration problem of multilayer network resource from overall angle.
Description of drawings
Fig. 1 is the flow chart of multilayer network resource optimization method embodiment one of the present invention;
Fig. 2 is the schematic network structure among the multilayer network resource optimization method embodiment one of the present invention;
Fig. 3 is the flow chart of multilayer network resource optimization method embodiment two of the present invention;
Fig. 4 is the schematic network structure among the multilayer network resource optimization method embodiment two of the present invention;
Fig. 5 is the flow chart of multilayer network resource optimization method embodiment three of the present invention;
Fig. 6 is the schematic network structure among the multilayer network resource optimization method embodiment three of the present invention;
Fig. 7 is the structural diagrams intention of direct optical path server embodiment of the present invention;
Fig. 8 is the structural diagrams intention of multilayer network resource optimization system embodiment of the present invention.
Embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Fig. 1 is the flow chart of multilayer network resource optimization method embodiment one of the present invention, and as shown in Figure 1, the multilayer network resource optimization method that the embodiment of the invention provides can comprise the steps:
Step 101, direct optical path server receive the multitiered network attribute information of the label switched path of network at the middle and upper levels.
Particularly, direct optical path server receives multitiered network each label switched path of network (Label Switching Path, attribute information LSP) at the middle and upper levels.The embodiment of the invention is when being optimized multitiered network; Introduced centralized direct optical path server (Bypass Server); Direct optical path server is the whole decision package that transmits in the network, can it be arranged within any one deck in the multitiered network, also can it be arranged on separately outside each layer network; Direct optical path server is the simple function unit, in conventional network layer, increases this device just and will do change slightly at chain of command and get final product.In the present embodiment; Upper layer network in the multitiered network is the MPLS network layer; Lower floor's network is the optical-fiber network layer, only switches to example with the path between these two networks and comes the method that the embodiment of the invention provides is described, and the multilayer network resource optimization method that the embodiment of the invention provides not is to be confined to MPLS network layer and optical-fiber network layer; Upper layer network can also be the optical channel data cell network layer, and lower floor's network can also be the wavelength channel network layer.
Direct optical path server receives the attribute information of each LSP of upper layer network, and this attribute information can comprise routing information, topology information and the real-time network flow information of each LSP.When each node in the upper layer network obtains the address of direct optical path server, can obtain through dynamic discovery and two kinds of methods of static configuration.It is to be noted; Node in the indication upper layer network can be specially the router node in the upper layer network here; Node in lower floor's network can be specially optical node, and the node that relates in the remainder in the embodiment of the invention all similarly repeats no more.Direct optical path server is through the attribute information of each LSP of reception upper layer network, and realization is understood the operating position of the current various resources of upper layer network to the collection of routing information, topology information and the real-time network flow information of each LSP of upper layer network.
Further; The direct optical path server reception multitiered network attribute information of the label switched path of network at the middle and upper levels can be specially: direct optical path server receives the report message that the first node of LSP sends in the said upper layer network, comprises the attribute information of the LSP of said upper layer network in the said report message.The report message that to be direct optical path server sent through the first node of LSP in the upper layer network obtains the correlation attribute information such as routing information, topology information and real-time network flow information of each LSP in the upper layer network; Direct optical path server is through collecting the attribute information of all LSP in the upper layer network, with the operating position of the various resources of obtaining upper layer network.
Particularly; The address that the first node of each LSP can obtain direct optical path server through the method for dynamic discovery in the upper layer network; Detailed process can adopt Interior Gateway Protocol (Interior Gateway Protocol for: direct optical path server; IGP) its address is flooded in the network; Be that direct optical path server comes the address of inundation self through periodically sending inundation message, the first node of each LSP in the network just can be found the existence of direct optical path server, and through resolving the address that this IGP agreement is obtained direct optical path server.Perhaps; The address that the first node of each LSP can also obtain direct optical path server through the method for static configuration in the upper layer network; Detailed process can for: the direct address of static configuration direct optical path server on the first node of each LSP in upper layer network makes the first node of each LSP find direct optical path server.
Step 102, direct optical path server be according to attribute information, among the LSP of statistics upper layer network node between network traffics.
Direct optical path server gets access to the various resource operating positions of upper layer network according to routing information, topology information and the real-time network flow information of each LSP of the upper layer network of collecting.Direct optical path server carries out statistical computation to these attribute informations, just can obtain node among each LSP of upper layer network between network traffics.Particularly; Direct optical path server can be earlier according to the attribute information that receives; Know the network traffic information of each LSP; Then according to the network traffic information of each LSP to each node between network traffics add up, be about to network traffics addition through all right LSP of this node, just obtain this node between network traffics.Therefore, the method that provides through the embodiment of the invention can precise statistics LSP in the network traffics of point-to-point transmission arbitrarily.
Be illustrated in figure 2 as the schematic network structure among the multilayer network resource optimization method embodiment one of the present invention, whole network is divided into three parts, i.e. router network layer (CE among the figure), MPLS-TE network layer (P among the figure and PE) and optical-fiber network layer (N among the figure).Wherein MPLS-TE network layer and optical-fiber network layer are that the integral body that the embodiment of the invention is optimized transmits network, the backbone network part that corresponding current network is formed.The whole network that transmits is used to connect the router network of zones of different and transport service is provided; MPLS-TE and optical transport network are hierarchical relationals in the whole transmission net; MPLS-TE network (being upper layer network) is carried by optical transport network (being lower floor's network), and optical transport network provides physical connection for the MPLS-TE network and can change the syntople and the network topology of MPLS-TE node layer through the interconnection of reprovision node.The metropolitan area network or the local network of the corresponding current network of router network, it is the IP/MPLS network.The MPLS-TE network is planned the MPLS-TE LSP Tunnel of netted full connection (full-mesh) between PE.Behind the data arrives PE of router network, on PE, provide the IP/MPLS data, add corresponding label, pass through with the MPLS encapsulation and wholely transmit network to the mapping of MPLS-TE, and at opposite side PE place peeling label, the IP data are consigned to the router network of opposite end.Transmit in the network in integral body, carry out the foundation or the deletion of direct optical path at MPLS network and optical transport network two interlayers, so direct optical path does not change the topology of router network.Therefore, the method that provides of present embodiment can eliminate since path change to the influence of route flapping in the IP network.
Because the MPLS-TE network is connection-oriented network; So specific link sequences forwarding of message process between two nodes among the LSP; Collect routing information, topology information and the real-time network flow information of MPLS network when direct optical path server after; Can make things convenient for and add up accurately arbitrary node between network traffics, be about to through this node right simple addition of all LSP flows just can obtain this node between network traffics.The embodiment of the invention adopts the advantage of MPLS-TE framework to be; This network has connection-oriented characteristic; Make network traffics accurately to add up, and hardware is realized easily, secondly the increase of MPLS-TE layer has shielded the foundation of direct optical path or has deleted the influence to the router topology; Because the MPLS network is not based on the shortest path pass-through mode, therefore can prevent of the attraction of newly-increased path simultaneously to other destination flow.
Step 103, the direct optical path service is right at node centering select target node according to network traffics and pre-configured policy information.
Each node of accomplishing LSP between after the statistical work of network traffics, network traffics that direct optical path server obtains according to statistics and pre-configured policy information, to destination node to selecting.Wherein, pre-configured policy information can be specially: the preset network traffics lower limit and/or the preset network traffics upper limit.Direct optical path server can through judge adjacent node between network traffics whether less than the network traffics lower limit of presetting; Also can through judge nonneighbor node between network traffics whether greater than the network traffics upper limit of presetting, come the select target node right.Also can adopt other policy information select target node right; For example the protection attribute according to some node in the network comes the select target node right; The protection attribute here can be specially: certain node in the network is protected, and does not allow unnecessary LSP through this node.
Particularly, direct optical path server according to network traffics and pre-configured policy information at node centering select target node to comprising following process:
At first, the direct optical path server both candidate nodes of confirming to wait to set up or delete direct optical path according to network traffics and pre-configured policy information is right.This step can specifically comprise: when said pre-configured policy information comprises under the preset network traffics in limited time, direct optical path server judge adjacent node between network traffics whether less than the network traffics lower limit of presetting.Wherein, preset network traffics lower limit specifically is to transmit the network of network ability to bear and predefined according to integral body, and adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right, adjacent node between have direct optical path.If certain adjacent node between network traffics less than preset network traffics lower limit, then direct optical path server confirm this adjacent node to for the both candidate nodes of waiting to delete direct optical path right.When said pre-configured policy information comprises on the preset network traffics in limited time, direct optical path server judge nonneighbor node between network traffics whether greater than the network traffics upper limit of presetting.Wherein, The preset network traffics upper limit specifically is to transmit the network of network ability to bear and predefined according to integral body; Nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right, nonneighbor node between do not have direct optical path.If certain nonneighbor node between network traffics greater than the preset network traffics upper limit, then direct optical path server confirm this nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right.
Secondly, direct optical path server is right at above-mentioned both candidate nodes centering select target node.Through behind the above-mentioned determining step; The both candidate nodes that direct optical path was set up or deleted to waiting of confirming is to for a plurality of; Direct optical path server selects one or several destination nodes right a plurality of both candidate nodes centerings, set up afterwards or delete this destination node between direct optical path.Said direct optical path server at said both candidate nodes centering select target node to being specially: said direct optical path server is right according to the path number select target node between the distance between two nodes of said both candidate nodes centering or two nodes.For example; When setting up direct optical path; Can be right to being destination node in both candidate nodes centering chosen distance both candidate nodes farthest, the both candidate nodes that perhaps direct optical path server is maximum in the path that both candidate nodes centering is selected to comprise between two nodes to for destination node right.In deletion during direct optical path, can be right to be destination node in the nearest both candidate nodes of both candidate nodes centering chosen distance, perhaps minimum both candidate nodes is right to being destination node in the path that both candidate nodes centering is selected to comprise between two nodes for direct optical path server.
Direct optical path server through the less adjacent node of releasing network flow between direct optical path, adopt a plurality of router polymerization traffics, can reduce cost, also improved the utilance of light path simultaneously.Simultaneously, direct optical path server through the bigger nonneighbor node of network traffics between set up direct optical path, bear current network traffics by the direct optical path router, reduce the processing consumption of intermediate router, make transmission cost reduce equally.
Step 104, direct optical path service driving destination node between the adjustment of direct optical path.
Particularly, the destination node of selecting to wait to adjust direct optical path from node centering to after, this destination node of direct optical path server driving between the adjustment of direct optical path.To destination node between direct optical path adjustment can for: set up destination node between direct optical path, perhaps delete destination node between direct optical path.
Particularly, the said destination node of direct optical path server driving between the adjustment of direct optical path can be the first node of direct optical path server driving destination node centering, set up or the deletion destination node between direct optical path.Wherein, The first node of destination node centering is the upstream node of this destination node centering, and promptly first node is the upstream node of this destination node centering with respect to another node, destination node centering; First node is a upstream node, and another node is a downstream node.Particularly, this node to the place a LSP transmitting data time, first node is received data earlier with respect to the downstream node of this destination node centering, by first node data is passed on this downstream node more then.It is pointed out that just to describe just for ease here first node is done such definition.First node is received after the driving of direct optical path server, sets up or delete its direct optical path to this downstream node.
Particularly; The first node of direct optical path server driving destination node centering; Set up destination node between the process of direct optical path can adopt following method: direct optical path server sends notice message to this first node, drives first node by this notice message and carries out the foundation of direct optical path.In this notice message, carry the light path information of direct optical path to be set up, wherein, light path information is used to indicate the path sequence of upright direct optical path yet to be built.After first node is received notice message; Send direct optical path according to the Section Point that is used to carry this first node in the downward layer network of light path information and set up request message, the Section Point in the request lower floor network is set up the direct optical path of the node that self is used to carry destination node centering downstream node in lower floor's network.
For example, in Fig. 2, because lower floor's network is the network that is used to carry upper layer network in the multitiered network, when between node PE1 and PE2, transmitting data, the physical pathway of data process is not < PE1, PE2 >, but < PE1, N1, N2, PE2 >.And for example, suppose that certain LSP in the upper layer network is < PE1, PE2, P2, PE3 >; The physical pathway of this LSP is < PE1, N1, N2, PE2, N2; N4, P2, N4, N6; PE3 >, can know that with the corresponding relation of the physical pathway of carrying this LSP the corresponding node of node PE2 in the physical pathway of this carrying LSP among the LSP is N2 by LSP, the node that then is used for carrying the node PE2 of upper layer network in lower floor's network is N2.Therefore; When the direct optical path set up between node PE2 and the PE3; Node PE2 (corresponding to first node) in the upper layer network sends direct optical path through the node N2 (corresponding to Section Point) that carries node PE2 in the downward layer network and sets up request message and accomplish direct optical path and set up request process, in request message, carries the light path information of direct optical path to be set up.Node N2 in lower floor's network sets up the direct optical path that the light path information of carrying in the request message is set up the node N6 that self is used to carry node PE3 in lower floor's network according to direct optical path; Wherein, After direct optical path is set up; Direct optical path server advertizing node PE2 and this direct optical path of its downstream node PE3 configuration are specially the link parameter and the protocol parameter that dispose this direct optical path.Wherein, link parameter can be IP addresses of nodes, and two nodes setting up behind the direct optical path must be arranged in same IP network section, therefore, need be configured its IP address.After direct optical path is set up, need in network, announce this direct optical path, generally adopt the method for advertising of route, therefore, protocol parameter can be the advertising of route protocol parameter.
Perhaps; The first node of direct optical path server driving destination node centering; Set up destination node between the process of direct optical path also can adopt following method: the Section Point that direct optical path server directly is used to carry first node downwards in the layer network sends notice message; In said notice message, carry the light path information of waiting to set up direct optical path, light path information is used to indicate the path sequence parameter of this direct optical path.Section Point is set up the direct optical path of the node that self is used to carry the corresponding downstream node of first node in lower floor's network according to said light path information.Afterwards, the first node of this destination node centering of direct optical path server announcement and downstream node configuration this direct optical path corresponding with first node are specially the link parameter and the protocol parameter that dispose this direct optical path.Wherein, link parameter can be IP addresses of nodes, and two nodes setting up behind the direct optical path must be arranged in same IP network section, therefore, need be configured its IP address.After direct optical path is set up, need in network, announce this direct optical path, generally adopt the method for advertising of route, therefore, protocol parameter can be the advertising of route protocol parameter.
Further, the said destination node of direct optical path server driving between the adjustment of direct optical path after, can also comprise the steps:
At first, direct optical path server sends a notification message to the first node of the LSP at said direct optical path place, comprises the identification information of the LSP at this direct optical path place of indication in the said notification message.After the foundation of accomplishing direct optical path or deletion; Direct optical path server sends a notification message to the first node of the LSP at this direct optical path newly-built or to be deleted place; Promptly send a notification message to the first node of relevant LSP; In notification message, carry the identification information of the LSP at this direct optical path place, this identification information shows the path sequence through the LSP of the direct optical path of newly-built or deletion, for example the LSP at this direct optical path place the node or the link sequences of process.
Next, the first node of the label switched path at said direct optical path place carries out the switching of network traffics according to said identification information.When newly-built direct optical path; Network traffics are switched to the LSP at newly-built direct optical path place; Identification information according to the LSP at the direct optical path that carries in notification message place switches to network traffics on the LSP at this direct optical path place, and identification information is used to indicate the LSP at this direct optical path place.When the deletion direct optical path, network traffics are switched on the other paths.Particularly, (Resource ReSerVation Protocol, RSVP) heavy route method is realized the above-mentioned handoff procedure of network traffics can to adopt newly-built light path method or RSVP.Wherein, newly-built light path method is to substitute original LSP through a newly-built LSP, and the forwarding priority of newly-built LSP is set to be higher than former LSP, can realize the switching of flow.The RSVP heavy route method then is to rebulid connection through RSVP signaling announcement subsequent node according to the path sequence of new LSP, and the original LSP of deletion can realize the switching of flow after the successful connection.
Present embodiment can be set up the node of direct optical path or deletion direct optical path from global optimum's viewpoint realization multilayer traffic engineering and decision-making through increasing the direct optical path server of centralized intelligence unit.The flow information and each layer link circuit resource of direct optical path server through collecting the overall situation; And decision is set up or the node of deletion direct optical path; Change the network topology of upper layer network with this; Can shield unreasonable request and ask, and coordinate the path switching of the LSP in the upper layer network with same class from different nodes.Eliminated that different nodes require to set up direct optical path simultaneously from self in the distributed network, eliminated the frequent variations phenomenon of resource contention phenomenon and network topology.On centralized direct optical path server, add the global coherency that strategy also can guarantee strategy.When newly-built or deletion direct optical path; Because which LSP direct optical path server can directly specify switch on the target LSP; Reduced the resource race to control with other no artis that recomputates of network node, the carrying out in order of collaborative MPLS-TE node layer photoreactive layer node.And direct optical path server is the simple function unit, do not have sophisticated functionss such as path computing, virtual topology management, and it is through collecting topology; Routing information; Flow comes the dynamic optimization network, even thereby direct optical path server break down, also just lose the dynamic optimization function of multitiered network; Can not influence the network route, the normal operation of signaling and institute's loaded service thereof.
The embodiment of the invention provides a kind of multilayer network resource optimization method; Set up direct optical path server through transmitting in the net in integral body; Realized solving the dynamic-configuration problem of multilayer network resource from overall angle; Solved the precise statistics problem of point-to-point transmission network traffics, eliminated because path change to the influence of route flapping in the IP network, can prevent the attraction of newly-increased path to other destination flow simultaneously.
Fig. 3 is the flow chart of multilayer network resource optimization method embodiment two of the present invention; As shown in Figure 3; Present embodiment provides a kind of multilayer network resource optimization method; Present embodiment is that example is explained the technical scheme of the embodiment of the invention further with newly-increased direct optical path, and particularly, present embodiment can comprise the steps:
Be illustrated in figure 4 as the schematic network structure among the multilayer network resource optimization method embodiment two of the present invention, in the MLSP network layer of upper strata, R1 and R5 are respectively the first node of two LSP, comprise four LSP among the figure altogether, suppose that LSP1 is < R1, R2, R3, R4 >, and LSP2 is < R1, R2, R4 >; LSP3 is < R5, R2, R3, R4 >, and LSP4 is < R5, R2, R4 >, and its corresponding physical link is respectively: < R1, N1, N2; R2, N2, N3, R3, N3, N4, R4 >, < R1, N1, N2; R2, N2, N4, R4 >, < R5, N5, N2, R2, N2, N3; R3, N3, N4, R4>and < R5, N5, N2, R2, N2, N4, R4 >.
Direct optical path server is promptly found in the address that the whole node that transmits in the net obtains direct optical path server through static configuration method or protocol dynamic method.The former promptly carries out static configuration to the address of direct optical path server on the node in upper layer network, and the latter then is the address that obtains direct optical path server through protocol dynamic.When adopting the protocol dynamic method to obtain the address of direct optical path server; Direct optical path server uses the IGP agreement, and for example OSPF or ISIS are flooded to self address in the network; Node in the upper layer network is through resolving the data of this agreement, the address that just can obtain direct optical path server.
Node in upper layer network obtains the address of direct optical path server; After promptly finding direct optical path server, if this node finds it self is the first node of certain LSP, then this node reports the attribute information of this LSP to direct optical path server; Comprising path sequence; Flow information, Internet resources etc., the wherein up-to-date flow information of flow information for periodically reporting to direct optical path server.As shown in Figure 4, first node R 1 node of LSP1 will report the path sequence of LSP1, i.e. < R1, R2, R3; R4 >, and the present flow rate T1 of LSP1, first node R 5 nodes of LSP3 report the path sequence of LSP2, i.e. < R5, R2; R3, R4 >, and the present flow rate T2 of LSP3, wherein; Present flow rate refer to each node among this LSP between flow, for example the present flow rate of LSP1 is T1, then R1 is T1 to the flow of R3 among the LSP1, the flow of R2 to R3 and R1 to R4 is T1 among the LSP1.
After direct optical path server is received the attribute information of this LSP that the first node of LSP reports; According to each node among the path sequence of each LSP and internodal each LSP of network traffic information statistical computation MPLS network layer to network traffics; For example; R1 has only the LSP1 process to this section of R3 light path, and then to obtain R1 be T1 to the total flow of R3 in statistical computation; LSP1 and LSP3 all through R2 to this section of R4 light path, then to obtain R2 be T1+T2 to the total flow of R4 in statistical computation.
The both candidate nodes that direct optical path server confirms to wait to set up direct optical path according to network traffics and pre-configured policy information is right, and direct optical path server is right at above-mentioned both candidate nodes centering select target node.When comprising on the preset network traffics, said pre-configured policy information prescribes a time limit; Direct optical path server judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit; If, then direct optical path server confirm this nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right.Direct optical path server selects one or several destination nodes right a plurality of both candidate nodes centerings, can come the select target node right according to the path number that comprises between the distance between two nodes of both candidate nodes centering or two nodes.Chosen distance both candidate nodes farthest is right to being destination node to the maximum both candidate nodes in the path of perhaps selecting to comprise between two nodes.For example, through judging, the flow of discovery from R2 to R4 is greater than prescribing a time limit on the network traffics that pre-set, and then new direct optical path is set up in the direct optical path server decision between R2 and R4.
The destination node of confirming to wait to set up direct optical path at direct optical path server to after, the first node that drives this destination node centering carries out the foundation of direct optical path, first node can be the upstream node of this node centering.For example in LSP1, two nodes waiting to set up the node centering of direct optical path are R2 and R4, and then the upstream node of this node centering is R2, and downstream node is R4, and promptly R2 is a first node, and this process can realize through following two kinds of methods.First method can be specially: at the node of having confirmed to wait to set up direct optical path to after for R2 and R4; Direct optical path server sends notice message to first node R2; In notice message, carry light path information, light path information is used to indicate the path sequence parameter of said direct optical path.The Section Point N2 that is used to carry R2 in the downward layer network of first node R2 sends light path and sets up request message; This message can be specially User Network Interface (User to Network Interface; UNI) request message; In this User Network Interface request message, carry configuration parameter, set up the direct optical path of the node that self is used to carry the corresponding downstream node of first node in lower floor's network through the Section Point in the transmission request lower floor network of this request message.After Section Point N2 in lower floor's network receives that this light path is set up request message, drive and set up self direct optical path to N4.Wherein, N4 is the node that is used to carry the downstream node R4 that waits to set up direct optical path in lower floor's network.Section Point N2 accomplishes after the foundation of N2 direct optical path between N4, and the N4 R4 in upper layer network automatically also sends a UNI request message, accomplishes the foundation of direct optical path between R2 and the R4.At last, this direct optical path of downstream node R4 configuration of direct optical path server announcement first node R2 and destination node centering promptly carries out the configuration of link parameter and protocol parameter.Wherein, link parameter can be IP addresses of nodes, and protocol parameter can be the advertising of route protocol parameter.Second method is: direct optical path server is directly announced the light path that N2 sets up through N4; Direct optical path server was announced R2 and R4 configuration link parameter and protocol parameter more respectively after light path was set up.
After the foundation of accomplishing direct optical path; Direct optical path server sends a notification message to the first node of the LSP at this direct optical path place; The first node of the relevant LSP of direct optical path server notice; Like R1 among Fig. 4 and R5, flow is switched on the LSP at this direct optical path place, show the node or the link sequences of the LSP process at this direct optical path place in the notification message.Wherein, first node R 1 can be through the switching of two kinds of methods realization flows with R5, and first method is: a newly-built LSP3 < R1; R2, R4>and LSP4 < R5, R2; R4>substitute original LSP1 and LSP2; Because LSP3 and LSP4 be through newly-built light path, the forwarding priority through LSP3 and LSP4 is set to be higher than LSP1 and LSP2, can realize that promptly network traffics switch on the LSP that newly-built light path belongs to.Second method is: adopt RSVP heavy-route technology, and first node R 1 application of RS VP signaling, the announcement subsequent node rebulids connection according to new path sequence; Bifurcation R2 directly connects R4 through newly-built light path; The R2 deletion makes flow switch on the LSP at newly-built direct optical path place originally through the connection of R3 after the successful connection, and at this moment the path sequence of LSP1 becomes < R1; R2, R4 >.The difference of above-mentioned two kinds of methods is that can there be two LSP in first method simultaneously when carrying out the network traffics switching, and one is original LSP, and another is to be switched target LSP, promptly can exist simultaneously like LSP1 among Fig. 4 and LSP3 two paths.And then only there is a LSP in second method when realizing the switching of network traffics, with original LSP deletion, sets up to be switched target LSP more earlier, promptly only has LSP1 or LSP3.
The embodiment of the invention provides a kind of multilayer network resource optimization method; Set up direct optical path server through transmitting in the net in integral body; Through direct optical path server the internodal network traffics of LSP are added up; And, realized solving the dynamic-configuration problem of multilayer network resource from overall angle according to the foundation of pre-configured policy-driven direct optical path, solved the precise statistics problem of point-to-point transmission network traffics; Eliminated because path change to the influence of route flapping in the IP network, can prevent the attraction of newly-increased path to other destination flow simultaneously.
Fig. 5 is the flow chart of multilayer network resource optimization method embodiment three of the present invention; As shown in Figure 5; Present embodiment provides a kind of multilayer network resource optimization method; Present embodiment is that example is explained the technical scheme of the embodiment of the invention further with the deletion direct optical path, and particularly, present embodiment can comprise the steps:
Be illustrated in figure 6 as the schematic network structure among the multilayer network resource optimization method embodiment three of the present invention, comprise two LSP among the figure, suppose that LSP1 is < R1, R2, R4 >, LSP2 is < R5, R2, R4 >.Direct optical path server is found in the address that the whole node that transmits in the net obtains direct optical path server through static configuration method or protocol dynamic method.
After the node in the upper layer network is found direct optical path server; If it self is the first node of certain LSP that this node is found; Then this node reports the attribute information of this LSP to direct optical path server, and wherein attribute information comprises path sequence, flow information; Internet resources etc., the wherein up-to-date flow information of flow information for periodically reporting to direct optical path server.
After direct optical path server is received the attribute information of this LSP that the first node of LSP reports, according to each node among each LSP in the path sequence in each path and the internodal network traffic information statistical computation MPLS network layer to network traffics.
The both candidate nodes that direct optical path server confirms to wait to delete direct optical path according to network traffics and pre-configured policy information is right, and direct optical path server is right at above-mentioned both candidate nodes centering select target node.When comprising under the preset network traffics, said pre-configured policy information prescribes a time limit; Direct optical path server judge adjacent node between network traffics whether less than preset network traffics lower limit; If, then confirm this adjacent node to for the both candidate nodes of waiting to delete direct optical path right.Direct optical path server selects one or several destination node right a plurality of both candidate nodes centerings; Can come the select target node right according to the path number that comprises between the distance between two nodes of both candidate nodes centering or two nodes; For example can the chosen distance during direct optical path nearest both candidate nodes of deletion to or the minimum both candidate nodes in the path selecting to comprise between two nodes to for destination node right, can chosen distance both candidate nodes farthest when newly-built direct optical path to or the maximum both candidate nodes in the path selecting to comprise between two nodes to for destination node right.For example, the flow of discovery from R2 to R4 is less than prescribing a time limit under the network traffics that pre-set, and then the direct optical path of direct optical path server decision deletion between R2 and R4 realized making full use of of route resource.
After the direct optical path server light path is confirmed to wait to delete the destination node of direct optical path; The first node that drives this destination node centering is according to this direct optical path of light path information deletion; And the node of announcing this direct optical path carries out the configuration of link parameter and protocol parameter, i.e. configuration link parameter and protocol parameter.Wherein, first node can be the upstream node of this node centering, and light path information is used to indicate the path sequence of upright direct optical path yet to be built, and link parameter can be IP addresses of nodes, and protocol parameter can be the advertising of route protocol parameter.
After direct optical path was deleted, the service disconnection that causes for the deletion that prevents direct optical path among the LSP need switch to the network traffics on this direct optical path on the other LSP.Wherein, can adopt two kinds of methods to realize the switching of network traffics, first method is for adopting the RSVP heavy route method, and for example the path with LSP1 becomes R1, R2, R3, R4.Second method substitutes the switching that route is accomplished network traffics through searching whether to exist, and whether inspection exists the LSP of backup with R5 to R4 from R1 to R4, if exist, then directly delete LSP1 and LSP2, and deletion back flow will automatically switch on the backup LSP.After flow switched completion, direct optical path server notice N2 deletion light path can directly be notified N2, also can send UNI through R2 and notify the node N2 that is used to carry R2 in lower floor's network.
The embodiment of the invention provides a kind of multilayer network resource optimization method; Set up direct optical path server through transmitting in the net in integral body; Through direct optical path server the internodal network traffics of LSP are added up; And, realized solving the dynamic-configuration problem of multilayer network resource from overall angle according to the deletion of pre-configured policy-driven direct optical path, solved the precise statistics problem of point-to-point transmission network traffics; Eliminated because path change to the route flapping that IP network produces, has prevented to attract behind the newly-increased path phenomenon of network traffics in other destination simultaneously.
Fig. 7 is the structural representation of direct optical path server embodiment of the present invention, and as shown in Figure 7, the direct optical path server that present embodiment provides comprises: receiver module 701, statistical module 702, selection module 703 and optimal module 704.Wherein, receiver module 701 receives the multitiered network attribute information of the label switched path of network at the middle and upper levels, and said attribute information comprises routing information, topology information and real-time network flow information.Receiver module 701 receives the report message that the first node of LSP sends in the upper layer network, in report message, comprises the attribute information of the LSP of upper layer network.Statistical module 702 is according to the said attribute information that receiver module 701 receives, add up node in the label switched path of said upper layer network between network traffics.Be statistical module 702 obtains each LSP in the upper layer network through attribute information correlation attribute information such as routing information, topology information and real-time network flow information; Through collecting the attribute information of each LSP in the upper layer network, with the operating position of obtaining the various resources of upper layer network and each node of upper layer network between network traffics.Select network traffics that module 703 obtains according to statistical module 701 statistics and pre-configured policy information right at node centering select target node.Optimal module 704 drive destination nodes between the adjustment of direct optical path, this destination node to for the destination node of selecting module 703 to select right.Particularly, to destination node between direct optical path adjustment can for: set up destination node between direct optical path, perhaps delete destination node between direct optical path.
Particularly, select module 703 to comprise first judging unit 713, second judging unit 723, confirm unit 733 and selected cell 743.Wherein, first judging unit 713 judge adjacent node between network traffics whether less than preset network traffics lower limit, adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right.Second judging unit 723 judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit, nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right.Confirm that unit 733 confirms that according to the judged result of first judging unit 713 or second judging unit 723 both candidate nodes of direct optical path to be adjusted is right.Selected cell 743 is right at both candidate nodes centering select target node.Wherein, Selected cell 743 can specifically be used in said both candidate nodes centering chosen distance both candidate nodes farthest right for destination node, perhaps be used for the both candidate nodes maximum in the path that said both candidate nodes centering is selected to comprise between two nodes to for destination node right.
Further; The direct optical path server that present embodiment provides also comprises: the notification message sending module; Wherein, The notification message sending module sends a notification message to the first node of the label switched path at said direct optical path place, in notification message, comprises the identification information of the label switched path at this direct optical path place of indication, and the first node of the label switched path at said direct optical path place carries out the switching of network traffics.Wherein, identification information is used to indicate the label switched path at said direct optical path place.After the foundation of accomplishing direct optical path or deletion; The notification message sending module sends a notification message to the first node of the LSP at this direct optical path newly-built or to be deleted place; In notification message, carry the identification information of the LSP at this direct optical path place, this identification information shows the path sequence through the LSP of the direct optical path of newly-built or deletion.
The embodiment of the invention provides a kind of direct optical path server; Realized solving the dynamic-configuration problem of multilayer network resource from overall angle; Solved the precise statistics problem of point-to-point transmission network traffics; Eliminated because path change to the influence of route flapping in the IP network, can prevent the attraction of newly-increased path to other destination flow simultaneously.
Fig. 8 is the structural representation of multilayer network resource optimization system embodiment of the present invention; As shown in Figure 8; The multilayer network resource optimization system that present embodiment provides comprises: multitiered network 801 and direct optical path server 802; Direct optical path server 802 receives the multitiered network attribute information of the label switched path of network at the middle and upper levels; Said attribute information comprises routing information, topology information and real-time network flow information, according to said attribute information, add up node in the label switched path of said upper layer network between network traffics; Said network traffics that obtain according to statistics and pre-configured policy information are right at said node centering select target node, and drive said destination node between the foundation or the deletion of direct optical path.
Further, direct optical path server 802 is to be provided with separately, perhaps is arranged in the multitiered network 801.Be direct optical path server 802 can be used as one independently server be arranged on separately outside the multitiered network 801; Also can be arranged among the multitiered network 801, even can be set together with the upper layer network of multitiered network 801 or certain node in lower floor's network.
The embodiment of the invention provides a kind of multilayer network resource optimization system; Through direct optical path server is set; Realized solving the dynamic-configuration problem of multilayer network resource from overall angle; Solved the precise statistics problem of point-to-point transmission network traffics, eliminated because path change to the influence of route flapping in the IP network, can prevent the attraction of newly-increased path to other destination flow simultaneously.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging embodiment of the invention technical scheme of relevant art scheme.
Claims (12)
1. a multilayer network resource optimization method is characterized in that, comprising:
Direct optical path server receives the attribute information of the label switched path of the upper layer network in the multitiered network;
Said direct optical path server is according to said attribute information, add up node in the label switched path of said upper layer network between network traffics;
Said direct optical path server is right at said node centering select target node according to said network traffics and pre-configured policy information;
The said destination node of said direct optical path server driving between the adjustment of direct optical path;
Said direct optical path server according to said network traffics and pre-configured policy information at said node centering select target node to comprising:
When comprising under the preset network traffics, said pre-configured policy information prescribes a time limit; Said direct optical path server judge adjacent node between network traffics whether less than preset network traffics lower limit; If, then confirm said adjacent node to for the both candidate nodes of waiting to delete direct optical path right; Said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
When comprising on the preset network traffics, said pre-configured policy information prescribes a time limit; Said direct optical path server judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit; If, then confirm said nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right; Said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Said direct optical path server is right at said both candidate nodes centering select target node.
2. multilayer network resource optimization method according to claim 1 is characterized in that, the adjustment of said direct optical path is specially: the foundation of direct optical path or deletion.
3. multilayer network resource optimization method according to claim 2 is characterized in that, the said direct optical path server reception multitiered network attribute information of the label switched path of network at the middle and upper levels is specially:
Said direct optical path server receives the report message of the first node transmission of label switched path described in the said upper layer network; The attribute information that comprises said label switched path in the said report message, said attribute information comprise routing information, topology information and real-time traffic information.
4. multilayer network resource optimization method according to claim 1; It is characterized in that, said direct optical path server at said both candidate nodes centering select target node to being specially: said direct optical path server is right according to the path number select target node between the distance between two nodes of said both candidate nodes centering or two nodes.
5. multilayer network resource optimization method according to claim 2 is characterized in that, the said destination node of direct optical path server driving between the foundation of said direct optical path be specially:
Said direct optical path server sends notice message, the light path information of in said notice message, carrying direct optical path to be set up to the first node of said destination node centering; Said first node is the upstream node of said destination node centering, and said light path information is used to indicate the path sequence of said direct optical path;
Said first node sends direct optical path according to the Section Point that is used to carry said first node in the downward layer network of said light path information and sets up request message, asks said Section Point to set up said direct optical path;
The downstream node that said direct optical path server is announced said first node and said destination node centering disposes the link parameter and the protocol parameter of said direct optical path.
6. multilayer network resource optimization method according to claim 2 is characterized in that, the said destination node of direct optical path server driving between the foundation of said direct optical path be specially:
The Section Point that carries said first node in the downward layer network of said direct optical path server sends notice message, the light path information of in said notice message, carrying direct optical path to be set up; Said first node is the upstream node of said destination node centering, and said light path information is used to indicate the path sequence parameter of said direct optical path;
Said Section Point is set up said direct optical path according to said light path information;
The downstream node that said direct optical path server is announced said first node and said destination node centering disposes the link parameter and the protocol parameter of said direct optical path.
7. according to claim 5 or 6 described multilayer network resource optimization methods, it is characterized in that said link parameter is the IP address of the downstream node of said first node and said destination node centering, said protocol parameter is the advertising of route protocol parameter.
8. multilayer network resource optimization method according to claim 2 is characterized in that, the said destination node of said direct optical path server driving between the adjustment of direct optical path after, also comprise:
Said direct optical path server sends a notification message to the first node of the label switched path at said direct optical path place, comprises the identification information of the label switched path at the said direct optical path of indication place in the said notification message;
The first node of the label switched path at said direct optical path place carries out the switching of network traffics according to said identification information.
9. multilayer network resource optimization method according to claim 8; It is characterized in that; The first node of the label switched path at said direct optical path place is specially according to the switching that said identification information carries out network traffics: the first node of the label switched path at said direct optical path place is according to said identification information; Through newly-built light path method or RSVP heavy route method, carry out the switching of network traffics.
10. a direct optical path server is characterized in that, comprising:
Receiver module is used for receiving the attribute information of label switched path of the upper layer network of multitiered network;
Statistical module is used for the said attribute information that receives according to said receiver module, add up node in the label switched path of said upper layer network between network traffics;
Select module, said network traffics that are used for obtaining according to said statistical module counts and pre-configured policy information are right at said node centering select target node;
Optimal module, be used to drive said destination node between the adjustment of direct optical path; Wherein, said selection module comprises:
First judging unit, be used to judge adjacent node between network traffics whether less than preset network traffics lower limit, said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
Second judging unit, be used to judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit, said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Confirm the unit, be used for confirming that according to the judged result of said first judging unit or second judging unit both candidate nodes of direct optical path to be adjusted is right;
Selected cell, it is right to be used at said both candidate nodes centering select target node.
11. direct optical path server according to claim 10 is characterized in that, also comprises:
The notification message sending module; Be used for sending a notification message to the first node of the label switched path at said direct optical path place; Comprise the identification information of the label switched path at the said direct optical path of indication place in the said notification message, the first node of the label switched path at said direct optical path place carries out the switching of network traffics according to said identification information.
12. multilayer network resource optimization system; It is characterized in that; Comprise multitiered network and direct optical path server; Said direct optical path server is used for receiving the attribute information of label switched path of the upper layer network of multitiered network, according to said attribute information, add up node in the label switched path of said upper layer network between network traffics; Right according to said network traffics and pre-configured policy information at said node centering select target node, and drive said destination node between the adjustment of direct optical path;
Wherein, said according to said network traffics and pre-configured policy information at said node centering select target node to comprising:
When said pre-configured policy information comprises under the preset network traffics in limited time, judge adjacent node between network traffics whether less than preset network traffics lower limit, if confirm that then said adjacent node is to being that to wait to delete the both candidate nodes of direct optical path right; Said adjacent node is to being that the node be made up of two adjacent nodes in the label switched path is right;
When comprising on the preset network traffics, said pre-configured policy information prescribes a time limit; Judge nonneighbor node between network traffics whether greater than the preset network traffics upper limit; If, then confirm said nonneighbor node to for the both candidate nodes of waiting to set up direct optical path right; Said nonneighbor node is to being that the node be made up of two non-conterminous nodes in the label switched path is right;
Right at said both candidate nodes centering select target node.
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