CN101147348B - Automatic exchange optical network layered route calculation and connection establishing method - Google Patents
Automatic exchange optical network layered route calculation and connection establishing method Download PDFInfo
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- CN101147348B CN101147348B CN2005800493120A CN200580049312A CN101147348B CN 101147348 B CN101147348 B CN 101147348B CN 2005800493120 A CN2005800493120 A CN 2005800493120A CN 200580049312 A CN200580049312 A CN 200580049312A CN 101147348 B CN101147348 B CN 101147348B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0088—Signalling aspects
Abstract
A method for automatically switched optical network hierarchy routing calculating and connection establishing, comprises the steps: a), configures each routing area of the optical network and its speaker, forms hierarchy topological relation that can calculate routing by the interaction between the various hierarchies and broadcasting within the routing areas; b) after the entrance network element receives the connection establishing request, sends it to the entrance connection controller CC1 of the routing area RA1;c) each routing area which receives the connection request searches the routing in the routing area by the entrance connection controller, and originates connection establishing, if it is bottom hierarchy routing area, completes the establishment of the optical mark channel in the routing area, proceeds step e), or else, proceeds step d);d) each node connection controller on the routing in the area sends sub network connection establishing request to the corresponding connection controller of the next hierarchy routing area speaker, returns to step c); e) each routing area returns the connection establishing result hierarchy and hierarchy to the entrance network element. The method of the invention makes the signaling interaction process of the routing calculating and the connection establishing hierarchically and consecutively, and is beneficial to complete the connection establishing rapidly.
Description
Technical field
The present invention relates to ASON (ASON:Automatically Switched OpticalNetwork) field, particularly the method for foundation is calculated and is connected to route in the hierarchical structure optical-fiber network.
Background technology
In recent years, communication services such as speech, data, video further develop towards the synthesization direction, and the Internet total business volume increases on explosion type ground with the speed of being doubled every year, becomes the main force of engulfing backbone bandwidth.According to statistics, the annual growth of voice service amount only is 10% in the world wide, and the annual growth of data service reaches 40%, then surpasses 400% in the annual growth of China's data service, develops very swift and violent.The continuous growth of traffic carrying capacity, add features such as professional sudden, self-similarity that self exists of Internet and lack of uniformity, mean at present towards the speech design, transmit dictyosome system based on Circuit-switched SDH/SONET and need carry out whole upgrading and renewal to data-centered optical-fiber network of new generation.
In order to adapt to the rapid emergence of data service, people recognize that the thinking of development of optical-fiber network can not only be confined to improve the transmission capacity aspect, the more important thing is and how to give full play to because the networking flexibility that is brought behind route and the exchange shift-in photosphere.By giving optical-fiber network intelligence in the protocol means that increases control automatically, this network is with the efficient of IP, the capacity of DWDM, the robustness of SDH/SONET, combine with advanced Control Software, make optical-fiber network obtain unprecedented flexibility and upgradability.ASON is exactly wherein a kind of good solution.
After the ASON network technology occurs, distributed connection is set up and has been replaced the centralized connection foundation in the conventional optical network in the ASON network, each node all has link road by calculating and selective power, so just requires to use Routing Protocol to come the communication network topology information.After solving network size expansion, the network topological information of propagating in the routed domain (RA:Routing Area) sharply increases and has a strong impact on the problem of network performance, the scheme of hierarchy type route has been proposed, just network is divided into the routed domain of different levels, restricted passage " floods " and carries out the scope of Routing Information Exchange, G.7715, the relation that has G.8080 provided routed domain level and sub-network point pool (SNPP) that ITU-T drafts has been set forth the routing infrastructure demand of ASON.
At present, light interconnection forum (OIF) has proposed a level route draft that uses OSPF (Open Shortest Path First) protocol extension, and this draft is illustrated with regard to the basic framework of level route.But, automatic exchange optical network layered route is calculated and is connected foundation, need be in layer calculate and be connected that to set up demand signalling mutual with the distributed route of carrying out of interlayer, this all stipulate corresponding interactive method in standard recommendation and agreement, do not have existing method to utilize yet.
Summary of the invention
The technical problem to be solved in the present invention provides the method that foundation was calculated and be connected to a kind of automatic exchange optical network layered route, for the optical-fiber network with hierarchical structure calculates route in the mode of level route, sets up the signal passage.
For explain clear accurately, earlier in conjunction with ASON level route standard recommendation and embody the characteristics of the inventive method, define following notion:
Node: control point with control plane path control deivce (RC), connection controller functions such as (CC).
Ingress node: refer to that being used to receive the connection that sends from other nodes in user, other routed domain or the territory in the territory sets up request, finishes the node that route is calculated in the territory.Ingress node is set up request corresponding to concrete connection, different business, and Ingress node may be different.
Represent point (Speaker): appointment special joint that is used for the upper layer node communication in routed domain, represent a little path control deivce (RC) except with finish the conventional Routing Protocol task with other node is the same, also be responsible for communicating by letter with corresponding path control deivce on the last route level, simultaneously, the responsible upper strata connection request of representing a little that receives of connection controller (CC) is set up the result with returning to be connected, if represent when a little not being the Ingress node of this connection request, the connection request in the territory, upper strata that need receive sends to the Ingress node of this territory correspondence.
In order to solve the problems of the technologies described above, the invention provides the method that foundation was calculated and be connected to a kind of automatic exchange optical network layered route, the optical-fiber network that is applied to have hierarchical structure may further comprise the steps:
(a) configuration in the described optical-fiber network each routed domain and represent a little, by representing a little in mutual routing iinformation of interlayer and the broadcasting of carrying out route in the territory, the hierarchical topology that forms complete carried out route calculating concerns;
(b) after entrance network element receives that request is set up in user's connection, send to the connection controller CC1 that routed domain RA1 goes up corresponding Ingress node, territory RA1 comprises the routed domain at this service source network element and purpose network element place simultaneously;
(c) each routed domain of receiving connection request obtains route in the territory by the connection controller inquiry path control deivce of its Ingress node, in the territory, initiate to connect the process of setting up, if this territory is the bottom territory, finish the foundation of signal passage in the territory, execution in step (e), if the lower floor territory that this territory comprises in addition, execution in step (d);
(d) in this territory on the route connection controller of each node set up request to the connection that a little connection controller sends subnet of representing in following one deck territory of its correspondence again, return step (c);
(e) each routed domain of receiving connection request will connect and set up the result and represent the connection controller CC1 that a little connection controller upwards successively turns back to routed domain RA1 by it, turn back to initial initiation again and connect the described entrance network element of setting up.
Further, said method also can have following characteristics: in the described step (a), the interlayer routing iinformation be alternately by represent in each territory a little path control deivce and the path control deivce of its territory, upper strata corresponding node carry out, this layer of path control deivce then is to understand network topology in the territory by the process that " floods " in the territory, makes the path control deivce of each node in the routed domain all have the routing iinformation of all lower floor's routed domain that this territory and this territory comprise.
Further, said method also can have following characteristics: in the described step (b), described entrance network element is to determine routed domain RA1's that connection request should send to according to the territory inclusion relation that obtains from LIST SERVER.
Further, said method also can have following characteristics: in the described step (a), each is represented a little, dispose the path control deivce of a correspondence thereon in one deck territory for it.
Further, said method also can have following characteristics: the connection of described step (c) in routed domain set up in the process, the connection controller of certain node is received after message is set up in connection and is consulted the distribute links connection on the route, the connection controller of next node sends connection and sets up message in this territory again, if the path control deivce of this node is that subnet connects the routed domain that is covered corresponding to following one deck territory and this time one deck territory, then the connection controller of this node also will send subnet connection foundation request to the connection controller that this time one deck territory is represented a little.
Further, said method also can have following characteristics: the connection in the described routed domain is set up process and is adopted the RSVP signaling procedure.
Further, said method also can have following characteristics: each node connects the representing a little of following one deck territory of controller correspondence in the described step (d), is meant path control deivce the representing a little of pairing time one deck territory when configuration that is connected the same node of controller with this.
Further, said method also can have following characteristics: in the described step (d), after representing a little connection controller and receiving that subnet connects the request of foundation, a little not the Ingress node of this connection request, then need this subnet connected and set up the Ingress node that ask send to this territory correspondence if this is represented.
Further, said method also can have following characteristics: in the described step (e), in each territory on the route connection controller of each node receiving that the connection that next node is returned on the route sets up the result, corresponding to down one deck territory and this time one deck territory be the subnet connection covered routed domain the time, after will receiving that also this territory is represented a connection that the connection controller returns and set up the result, return to connect to its last node again and set up the result, set up equal whens success of result in the connection of receiving, return to connect and set up successful result, otherwise, return the result of failure, and resource releasing processing is carried out in the connection of having set up.
Further, said method also can have following characteristics: in this method, not having the signalling interactive process between the different routed domain of inclusion relation is parallel procedure.
As from the foregoing, use automatic exchange optical network layered route of the present invention to calculate and be connected the method for foundation, can make route calculating and be connected reciprocal process stratification, the methodization of setting up signaling, while level route connects sets up parallel carrying out, and sets up for quick connection to provide the foundation.
Summary of drawings
Fig. 1 is the structural representation of embodiment of the invention lamina optical network.
Fig. 2 is the corresponding relation figure of embodiment of the invention path control deivce and lower floor's network domains.
Fig. 3 is that the embodiment of the invention connects the Signalling exchange schematic diagram of setting up.
Preferred forms of the present invention
Following elder generation illustrates the lamina optical network structure of present embodiment in conjunction with Fig. 1.
As shown in Figure 1, this network is formed by four layers, and each layer is made up of the routed domain that quantity does not wait.Each routed domain is made up of control plane assembly and transmission plane resource, the network element that comprises control plane logical process plate with some is associated physically, each control plane logical process plate comprises connection controller (CC), path control deivce (RC), Link Resource Manager control plane processing capacities such as (LRM), from in logic, the control point that will have control plane path control deivce (RC), connects controller functions such as (CC) is called node.The path control deivce of mentioning same numbering below be connected controller is meant same node on physical layer different control functions module, as path control deivce N123 be connected the different control functions that controller N123 is meant same node.Only show the part of nodes in the territory among the figure.
The bottom of Fig. 1 lamina optical network structure comprises seven routed domain: L1RA1, L1RA2, L1RA3, L1RA4, L3RA2, L2RA3, L2RA4, the bottom here is meant the layer on the most close transmission plane, though L3RA2 and L2RA3, L2RA4 are in logic three layers and two layers, belong to bottom.Network element node N111, N112, N121, N122, N131, N132, N141, N142, N321, N322, N231, N232, N241, N242 are the transport layer network elements that physically exists light to connect, routed domain L1RA1 realizes that by network element N111, N112 and control plane logical process function other bottom routed domain and routed domain L1RA1 are similar.
Routed domain L2RA1, L2RA2, L2RA3, L2RA4 constitute the second layer in logic, and routed domain L3RA1, L3RA2, L3RA3 constitute in logic the 3rd layer, and routed domain L4RA constitutes in logic the 4th layer.
Routed domain L4RA and routed domain L3RA1, L3RA2, relation between the L3RA3, routed domain L3RA1 and routed domain L2RA1, relation between the L2RA2, routed domain L3RA3 and routed domain L2RA3, relation between the L2RA4, routed domain L2RA1 and routed domain L1RA1, relation between the L1RA2 and routed domain L2RA2 and routed domain L1RA3, relation between the L1RA4 satisfies the strategy that comprises of ITU-TG.8080 suggestion, hereinafter with routed domain L3RA1, L3RA2, L3RA3 is called following one deck territory that routed domain L4RA comprises, following one deck territory L2RA1 that territory L3RA1 is comprised, L2RA2 is called the routed domain that its last layer territory L4RA comprises, and other is analogized therewith.
The user disposes representing a little of optical network layered structure and territory by management plane earlier.The filling network element node of black is by the representing a little of management plane appointment among Fig. 1, and each is represented a little, is the path control deivce of a correspondence of its configuration thereon in one deck routed domain.
Among Fig. 1, node N111, N121, N131, N141 are respectively representing a little of routed domain L1RA1, L1RA2, L1RA3, L1RA4, and node N211, N212, N221, N222 are respectively the nodes of representing a N111, N121, N131, N141 corresponding path control deivce place on the second layer.Node N212, N221 are respectively representing a little of routed domain L2RA1, L2RA2, and node N311, N312 are respectively the nodes of representing a N212, N221 corresponding path control deivce place on the 3rd layer.Node N311 is representing a little of routed domain L3RA1, and node N411 is a node of representing a N311 corresponding path control deivce place on the 4th layer.Node N321 is representing a little of routed domain L3RA2, and node N412 is a node of representing a N321 corresponding path control deivce place on the 4th layer.Node N231, N241 are respectively representing a little of routed domain L2RA3, L2RA4, and node N331, N332 are respectively the nodes of representing a N231, N241 corresponding path control deivce place on the 3rd layer.Node N331 is representing a little of routed domain L3RA3, and node N413 is a node of representing a N331 corresponding path control deivce place on the 4th layer.The L4RA territory is the top layer routing control field, does not represent a little.
This layer of path control deivce is by the network topology in the process understanding territory that " floods " in the territory, some path control deivces in this layer of territory also are responsible for a communication of representing of the lower floor routed domain corresponding with it, understand the routing iinformation of its corresponding lower floor's routed domain and in the distribution that " floods " of this routed domain, formed the hierarchical topology relation that stable carried out route is calculated, the path control deivce of each node all has the routing iinformation of all lower floor's routed domain that this routed domain and this routed domain comprise in each routed domain, each node all can respond routing inquiry request, route in the computational fields.Fig. 2 shows the corresponding relation of the routing control field of path control deivce and lower floor's network.Corresponding to routing control field L1RA1, the path control deivce of node N212 is corresponding to routing control field L1RA2 as the path control deivce of node N211, or the like.
The flow process of the embodiment of the invention is described below in conjunction with Fig. 1, Fig. 2 and Fig. 3.Fig. 3 is the Signalling exchange schematic diagram that present embodiment layering route connect to be set up, and the straight line that the figure acceptance of the bid is marked with the S+ numeral is represented the repeating process of signaling, and hundred of numeral and tens were represented program number, and units is represented the different disposal example in the process.The units of signaling procedure is represented the order of signaling procedure in same territory, disregards to connect the processing time of setting up signaling.Be noted that the signalling interactive process between same area writes in the step though incite somebody to action not in the following flow process, just simple in order to explain, the signalling interactive process between same area is not a parallel procedure, does not have orbution.
As shown in Figure 2, suppose that the user sets up a connection from network element N111 to network element N242 to the optical-fiber network request, the user has specified the mark that goes out of going into mark (Label) and network element N242 of network element N111, here " mark " refers to professional up and down point, the corresponding physical notion can be certain port on the equipment.This process is shown in the process among Fig. 3 11.
Step 1, entrance network element N111 receives user's connection request, and according to the territory inclusion relation, definite will the connection set up the inlet connection controller N411 that asks directly to send to correspondence in the 4th layer of routed domain L4RA, and this process illustrates with process S11 in Fig. 3;
Here, if professional territory, source and destination place need be striden layer and could be solved, just need the routed domain that the request of foundation sends to the upper strata will be connected, which floor specifically needs to cross over, can determine that this territory, upper strata need comprise the territory at this network element place, business two ends simultaneously according to the territory inclusion relation that several different methods such as " LIST SERVERs " obtains.
Step 2, connect the path control deivce that controller N411 inquires about this node, the route results that path control deivce N411 calculates in the L4RA of territory be N411＜-N412＜-N413, connect controller N411 then to connecting controller N412, connection controller N412 initiates successively to connect to connection controller N413 again and sets up process, and this process illustrates with process S21 and process S22 in Fig. 3;
The concrete grammar the present invention who calculates for route in the territory does not limit.Process is set up in connection in the territory can adopt the RSVP signaling procedure, the connection controller of node N412 is consulted the distribute links connection after receiving Path message, the connection controller of next node N413 sends Path message in this territory, if the path control deivce of this node (or other path control deivce corresponding with it) is corresponding to the following one deck territory that comprises, then it connects controller also needs to send subnet connection foundation request to the connection controller that this time one deck territory is represented a little.
Step 3, connection controller N411 in the L4RA of territory, after N412 and N413 receive and are connected the request of foundation, judge that based on the inclusion relation of routed domain subnet connects the gateway network element of the following one deck routed domain that is covered, the subnet request of connect setting up is sent to the N311 that represents with the pairing lower floor of the path control deivce network of same node (also can specify specially), N321 and N331, this process in Fig. 3 with process S31, S32 and S33 illustrate, if on the route path control deivce of node do not have corresponding following one deck routed domain maybe this time one deck territory be not that subnet connects the routed domain that is covered, just do not need to send subnet and connect to set up and ask;
Step 4, the N311 that represents of territory L3RA1 and L3RA3 also is this Ingress node that is connected with N331 simultaneously, after receiving that subnet connects the request of foundation, route in the difference computational fields in territory L3RA1 and L3RA3, represent route results that a N311 calculates be in the L3RA1 of territory N311＜-N312, represent route results that a N331 calculates be in the L3RA3 of territory N331＜-N332, represent a N311 and represent a N331 according to route result of calculation, initiate to be connected the process of foundation to N312 and N332 respectively, this process illustrates with process S41 and process S42 in Fig. 3;
Step 5, connection controller N311 in the L3RA1 of territory and N312 be according to the inclusion relation of routed domain, with subnet connect the request of foundation send to same node path control deivce correspondence lower floor's network represent a N212 and N221; Equally, the connection controller N331 in the L3RA3 of territory and N332 with subnet is connected set up lower floor's network of asking to send to same node path control deivce correspondence represent a N231 and N241.This process illustrates with process S51, S52, S53 and S54 in Fig. 3;
Step 6, after the representing a N212 and N221 and receive that subnet is connected the request of foundation of territory L2RA1 and L2RA2, in the L2RA1 of territory, representing a N212 is not the Ingress node that subnet connects, subnet need be connected the Ingress node N211 that the request of foundation sends to this territory, this process illustrates with process S55 in Fig. 3; Point (also the being Ingress node) N221 that represents in territory L2RA1 interior nodes N211 and the territory L2RA2 distinguishes route in the computational fields, the route results that node N211 calculates in the L2RA1 of territory be N211＜-N212, represent route results that a N221 calculates be in the L2RA2 of territory N221＜-N222, node N211 and represent a N221 according to route result of calculation initiates to be connected the process of foundation to N212 with N222 respectively.This process illustrates with process S61 and process S62 in Fig. 3;
Step 7, according to the inclusion relation of routed domain, the connection controller N211 in the L2RA1 of territory and N212 with subnet is connected set up lower floor's network of asking to send to same node path control deivce correspondence represent a N111 and N121; Equally, the connection controller N221 in the L2RA2 of territory and N222 with subnet is connected set up lower floor's network of asking to send to same node path control deivce correspondence represent a N131 and N141, this process illustrates with process S71, S72, S73, S74 in Fig. 3;
Step 8, bottom routed domain L1RA1, L1RA2, L1RA3, L1RA4, L3RA2, L2RA3, the connection controller N111 that represents point (also being Ingress node) of L2RA4, N121, N131, N141, N321, N231, N241 receives the route of calculating behind the subnet connection request in the territory separately, result of calculation is respectively: N111＜-N112, N121＜-N122, N131＜-N132, N141＜-N142, N321＜-N322, N231＜-232, N241＜-N242, process is set up in the connection of carrying out in each territory shown in Fig. 3 dotted line, carries out the foundation of signal path (data transmission channel) in the territory.What carried out in the bottom territory is that actual data path is set up process, success is all set up in each bottom territory, whole piece is professional just to be created successfully, and data flow will be from network element N112, N121, N122, N131, N132, N141, N142, N321, N322, N231, N232, the N241 arrival outlet network element N242 of entrance network element N111 through each bottom territory.
The connection controller of each territory interior nodes will connect to be set up the result and returns to the connection controller represented in the territory a little (if represent a little non-Ingress node, then each node will connect earlier and set up the connection controller that the result turns back to Ingress node, send to this territory by it again and represent a little connection controller), will connect by the connection controller of representing a N111, N121, N131, N141, N321, N231, N241 and to set up the connection controller that the result returns to last layer routed domain node N211 to its transmission request of connecting, N212, N221, N222, N412, N331, N332.This process illustrates with process S81, S82, S83, S84, S85, S86, S87 in Fig. 3;
Step 9, receive down among territory L2RA1, the L2RA2 that connection that one deck territory is returned sets up result's connection controller N212, N222 the connection controller that the result returns to this realm entry node N211, N221 is respectively set up in this connection, this process is shown in the process S88 among Fig. 3, S92.Because N211 represents a little, also this connection will be set up the result and re-send to the connection controller that a N212 is represented in this territory, this process is shown in the process S91 among Fig. 3;
Step 10, the connection controller of representing a N212, N221 of territory L2RA1, L2RA2 will connect to be set up the result and returns to last layer routed domain node N311, the connection controller of N312 to its transmission request of connecting.This process is shown in the process S101 among Fig. 3, S102;
Step 11, receiving down among territory L3RA1, the L3RA3 that one deck territory is returned connects connection controller N311, the N312 set up the result connection controller that the result returns to this realm entry node N311, N331 is respectively set up in this connection, shown in the process S111 among Fig. 3, S112;
Step 12, the connection controller of representing a N311, N331 of territory L3RA1, L3RA3 will connect to be set up the result and returns to last layer routed domain node N411, the connection controller of N413 to its transmission request of connecting.Shown in the process S121 among Fig. 3, S122;
Step 13, receiving down among the L4RA of territory that one deck territory is returned connects the connection controller N413 set up the result and connects and set up the connection controller that the result returns to N412, the connection controller of N412 will connect again sets up the connection controller that the result returns to this realm entry node N411, shown in the process S131 among Fig. 3, S132;
Step 14, the connection controller of node N411 are received in the territory with after being connected of interlayer set up the result, the result are returned to initial initiation connect the node N111 that sets up.Shown in the process N141 among Fig. 3.
Among the embodiment, the request of connect setting up of interlayer subnet all is to send to down one deck territory to represent a little connection controller, if representing a little is not the Ingress node that subnet connects, also this subnet to be connected the connection controller that the request of foundation is transmitted to this realm entry node, carrying out route by it calculates, and initiate to connect and set up process, being calculated by Ingress node is the mode of a kind of " source routing ", can simplify signalling interactive process.
In the described territory on the route connection controller of each node receiving that the connection that next node is returned on the route sets up the result, corresponding to following one deck territory the time, after will receiving that also this territory is represented a connection that the connection controller returns and set up the result, return to connect to its last node again and set up the result, set up equal whens success of result in the connection of receiving, return and connect to set up successful result, otherwise, the result of failure returned.Like this,, think that then whole connection sets up failure, return failure information to described entrance network element, and resource releasing processing is carried out in the connection of having set up as long as receiving that the route of arbitrary routed domain of the request of connect setting up is calculated or connected sets up failure.
In sum, the reciprocal process of the layering routing inquiry information that the present invention adopts under the bigger situation of network size, provides clearly route calculating querying method of a kind of well arranged orderliness.
Industrial applicibility
Automatic exchange optical network layered route of the present invention is calculated with the method that is connected foundation can be applied to ASON, make route calculating and be connected reciprocal process stratification, the methodization of setting up signaling, parallel carrying out set up in simultaneously level route connection, provides the foundation for connecting fast foundation.
Claims (9)
1. the method for foundation is calculated and is connected to an automatic exchange optical network layered route, and the optical-fiber network that is applied to have hierarchical structure may further comprise the steps:
(a) configuration in the described optical-fiber network each routed domain and represent a little, by representing a little in mutual routing iinformation of interlayer and the broadcasting of carrying out route in the territory, the hierarchical topology that forms complete carried out route calculating concerns;
(b) after entrance network element receives that request is set up in user's connection, send to the connection controller CC1 that routed domain RA1 goes up corresponding Ingress node, territory RA1 comprises the routed domain at this service source network element and purpose network element place simultaneously; Wherein, described entrance network element is to determine routed domain RA1's that connection request should send to according to the territory inclusion relation that obtains from LIST SERVER;
(c) each routed domain of receiving connection request obtains route in the territory by the connection controller inquiry path control deivce of its Ingress node, in the territory, initiate to connect the process of setting up, if this territory is the bottom territory, finish the foundation of signal passage in the territory, execution in step (e), if the lower floor territory that this territory comprises in addition, execution in step (d);
(d) in this territory on the route connection controller of each node set up request to the connection that a little connection controller sends subnet of representing in following one deck territory of its correspondence again, return step (c);
(e) each routed domain of receiving connection request will connect and set up the result and represent the connection controller CC1 that a little connection controller upwards successively turns back to routed domain RA1 by it, turn back to initial initiation again and connect the described entrance network element of setting up.
2. the method for claim 1, it is characterized in that, in the described step (a), the interlayer routing iinformation be alternately by represent in each territory a little path control deivce and the path control deivce of its territory, upper strata corresponding node carry out, this layer of path control deivce then is to understand network topology in the territory by the process that " floods " in the territory, makes the path control deivce of each node in the routed domain all have the routing iinformation of all lower floor's routed domain that this territory and this territory comprise.
3. the method for claim 1 is characterized in that, in the described step (a), each is represented a little, disposes the path control deivce of a correspondence thereon in one deck territory for it.
4. method as claimed in claim 3, it is characterized in that, the connection of described step (c) in routed domain set up in the process, the connection controller of certain node is received after message is set up in connection and is consulted the distribute links connection on the route, the connection controller of next node sends connection and sets up message in this territory again, if the path control deivce of this node is that subnet connects the routed domain that is covered corresponding to following one deck territory and this time one deck territory, then the connection controller of this node also will send subnet connection foundation request to the connection controller that this time one deck territory is represented a little.
5. method as claimed in claim 4 is characterized in that, the connection in the described routed domain is set up process and adopted the RSVP signaling procedure.
6. method as claimed in claim 3, it is characterized in that, each node connects the representing a little of following one deck territory of controller correspondence in the described step (d), is meant path control deivce the representing a little of pairing time one deck territory when configuration that is connected the same node of controller with this.
7. the method for claim 1, it is characterized in that, in the described step (d), after representing a little connection controller and receiving that subnet connects the request of foundation, if this is represented a little is not the Ingress node of this connection request, then need this subnet is connected the Ingress node that the request of foundation sends to this territory correspondence.
8. method as claimed in claim 3, it is characterized in that, in the described step (e), in each territory on the route connection controller of each node receiving that the connection that next node is returned on the route sets up the result, corresponding to down one deck territory and this time one deck territory be the subnet connection covered routed domain the time, after will receiving that also this territory is represented a connection that the connection controller returns and set up the result, return to connect to its last node again and set up the result, set up equal whens success of result in the connection of receiving, return to connect and set up successful result, otherwise, return the result of failure, and resource releasing processing carried out in the connection of having set up.
9. the method for claim 1 is characterized in that, in this method, not having the signalling interactive process between the different routed domain of inclusion relation is parallel procedure.
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| PCT/CN2005/001140 WO2007012223A1 (en) | 2005-07-28 | 2005-07-28 | A method for automatically switched optical network hierarchy routing calculating and connection establishing |
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| WO2007012223A1 (en) | 2007-02-01 |
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