CN101325542B - Method for acquiring PCE capability information between fields, PCE and capability-acquiring apparatus - Google Patents
Method for acquiring PCE capability information between fields, PCE and capability-acquiring apparatus Download PDFInfo
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Abstract
The invention discloses a method for acquiring inter-domain PCE capability information, PCE and capability acquiring device. The method for acquiring inter-domain PCE capability information includes that a local domain PCE transmits a capability information request to a neighborhood PCE; the local domain PCE receives the capability information returned from the neighborhood PCE; and the local domain PCE stores the capability information of the neighborhood PCE. The invention can alleviate network and PCE burden during acquiring capability information of other domains, and can keep secret of the inter-domain PCE capability information.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of acquisition methods, PCE and ability deriving means of PCE capability information between fields.
Background technology
(Traffic Engineering, TE) network has favorable service quality (Quality ofservice, QoS) security mechanism, and be each strip label switching path (Label Switch Path, LSP) special reserving network resources to traffic engineering.Wherein, a kind of route computing technique of TE network using is called centralized route.
Centralized route technology mainly is that the route computing function of network element node is independent, this paper claims this independent route computing function to be: PCE (Path Computation Element, based on network node, application program or the module in constraints and network topology computing network path, as router, route calculation server).Along with the continuous expansion of network size, general in the deployment of reality, adopt different PCE to manage TE information in the territory separately respectively, can also dispose a plurality of PCE in the same territory.And calculate needs in order to satisfy route, the topological sum TE information of network is injected PCE, and unify to bear the route calculation task by it.
At PCC (Path Computation Client, initiate the clients entities of path computing request to PCE, such as common network element) need carry out in the territory route when calculating, only need tell PCE by message with the first and last node in path and the constraints that needs to satisfy, this PCE then can call suitable algorithm and go out a route that satisfies business need according to the TE information calculations, and with explicit route object (Explicit RouteObject, ERO) information returns to node.Node just can drive signaling foundation connection end to end after receiving routing information.
When carrying out cross-domain route calculating, pass through path-calculating element communication protocol (PathComputation Element Communication Protocol between the PCE, PCECP) mechanism communicates, and coordination calculates an end-to-end complete route mutually.The role that PCE had both played the part of PCE in this process is also playing the part of the role of PCC, he also needs the PCE in other territory to send the road request of calculating (calculating the road request between the territory) when calculating the route task for node bearing, and receives other territory PCE route result of calculation and it is combined into end-to-end complete routing iinformation finally feeds back to PCC.
Calculate in order to allow PCC select PCE to carry out route efficiently, PCC need know the position of PCE in its territory, and some other with select the relevant PCE ability information of PCE, such as the disposal ability of PCE, calculate specification, support to retrain etc.Carrying out cross-domain route when calculating, the PCE in this territory need know the correlation energy force information of PCE in other territory.
In order to carry out in the territory efficiently or inter-domain routing calculating, need a kind of effective PCE ability securing mechanism satisfy this demand.PCE ability in the territory is obtained can be by expansion Open Shortest Path First (Open Shortest Path First, OSPF) agreement, the relevant ability information of the PCE inundation mechanism by OSPF is spread at the whole network, realize that PCC in the territory learns the function of PCE ability information.PCE ability between the territory is obtained can (Border Gateway Protocol, BGP) agreement be encapsulated into the PCE ability information in the extended attribute of BGP and realize spreading between the territory by transforming Border Gateway Protocol.
In carrying out the invention process, the inventor finds that above-mentioned existing PCE ability is obtained and has following problem in the technology at least:
By the operation burden of bgp protocol, and give uncorrelated node the PCE leakage of information in irrelevant territory easily, the privacy of network is impacted PCE ability information the whole network diffusion emphasis network.
Summary of the invention
The technical problem that embodiment of the present invention will solve provides PCE ability acquisition methods and PCE between a kind of territory, can reduce information conveying capacity in the network, alleviate network delivery burden.
The acquisition methods of network node PCE ability information between a kind of territory is provided, comprises: this territory PCE is to neighborhood PCE transmitting capacity information request; Described this territory PCE receives the ability information that described neighborhood PCE returns; The ability information that described this territory PCE preserves described neighborhood PCE.
A kind of network node PCE is provided, comprises: the capability requests unit is used for to neighborhood PCE transmitting capacity information request; The ability receiving element is used to receive the neighborhood PCE ability information of described capability requests unit requests; Memory cell is used to store the neighborhood PCE ability information that described ability receiving element receives.
A kind of ability deriving means is provided, comprises: the capability requests unit is used for to neighborhood PCE transmitting capacity information request; The ability receiving element is used to receive the PCE ability information of described capability requests unit requests.
A kind of PCE is provided, comprises: the address transmitting element is used to send local address to the PCE of foreign lands; The first request receiving element is used to receive the ability information request of the described PCE of foreign lands; The ability transmitting element is used for sending local ability information to the described PCE of foreign lands after the described first request receiving element receives described ability information request.
Above technical scheme because the ability information that PCE initiatively optionally inquires about neighborhood PCE is not asked other incoherent PCE ability information, realizes obtaining as required as can be seen.Adopt the method for information inundation to carry out the ability diffusion compared to existing technology and may cause the technical problem of network blockage, embodiment of the present invention can reduce the information conveying capacity in the network with point-to-point form acquisition capability, therefore reduces network delivery burden; Because local PCE can optionally inquire about adjacent domains PCE ability information, reduce the maintenance of information amount of local PCE again, reduce the complexity that PCE selects; Again and, because point-to-point acquisition capability information, do not carry out the ability diffusion by agreement, can realize that PCE capability information between fields maintains secrecy.
Description of drawings
Fig. 1 is the flow chart of the acquisition methods of network node PCE ability information between territory of the present invention;
Fig. 2 is the method flow diagram that obtains neighborhood PCE address among Fig. 1;
Fig. 3 is the theory diagram of first, second execution mode of PCE of the present invention;
Fig. 4 is the theory diagram of PCE the 3rd, the 4th execution mode of the present invention;
Fig. 5 is the theory diagram of ability deriving means first execution mode of the present invention.
Embodiment
The present invention at first provides the acquisition methods basic embodiment of network node PCE ability information between the territory, comprises step:
A, this territory PCE are to described neighborhood PCE transmitting capacity information request;
B, described this territory PCE receive the ability information of the described neighborhood PCE that returns;
The ability information that C, described this territory PCE preserve described neighborhood PCE.
Above execution mode because the ability information that PCE initiatively optionally inquires about neighborhood PCE is not asked other incoherent PCE ability information, is realized obtaining as required as can be seen.Adopt the method for information inundation to carry out the ability diffusion compared to existing technology and may cause the technical problem of network blockage, embodiment of the present invention can reduce the information conveying capacity in the network with point-to-point form acquisition capability, therefore reduces network delivery burden; Because local PCE can optionally inquire about adjacent domains PCE ability information, reduce the maintenance of information amount of local PCE again, reduce the complexity that PCE selects; Again and, because point-to-point acquisition capability information, do not carry out the ability diffusion by agreement, can realize that PCE capability information between fields maintains secrecy.
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing execution mode that develops simultaneously, the present invention is described in more detail.
Consulting Fig. 1, is the flow chart of acquisition methods second execution mode of network node PCE ability information between territory of the present invention.Described method can be applied to the TE network, comprises step:
Step 101: the PCECP that is established to described adjacent PCE according to neighborhood PCE address connects;
When system initialization, this territory (the first net territory) PCE can obtain neighborhood (the second net territory) PCE address; In these PCE addresses, select a suitable PCE address to connect again with the PCECP that is established to this second net territory PCE.
Described neighborhood PCE address can by manual configuration or by Interior Gateway Protocol (InternalGateway Protocol, IGP)/bgp protocol spreads and obtain.Described operation of spreading is to adopt the automatic discovery of PCE between the territory to operate the capability learning that starts PCE between the territory, to obtain to comprise the various neighborhood PCE information of neighborhood PCE address.In addition, the method that the present invention obtains neighborhood PCE address is not limited to said method, can obtain neighborhood PCE address by any possible approach.
Present embodiment can (Network Management System NMS) spreads by the IGP/BGP agreement and obtains described neighborhood PCE address by network management system.Consult Fig. 2, the described method that obtains described neighborhood PCE address that spreads comprises step:
1) NMS only spreads PCE address and affiliated territory id information thereof by NMPs such as IGP/BGP;
Select PCE the time, discerning the sign that PCE is the most basic is the PCE address information, the address information of having known PCE just can send message and connects to it.Because for a certain specific PCE, its calculation road ability is basic just definite when disposing, can be not frequent during the network operation change, so in the present embodiment PCE for self-ability information only spread address information between the territory and with it under territory ID, the equal indiffusion of other ability information;
The address of PCE and the issue of affiliated territory id information can dynamically be spread by IGP or bgp protocol, also can dispose by network management system.Can only between adjacent domains, issue or dispose in the present embodiment, only need connect with adjacent PCE and consult when calculating the road because PCE cooperates.So local PCE just can know which PCE of existence in the adjacent domains, and what the address is.Be convenient in the subsequent step optionally to establish a communications link by the PCECP agreement, and obtain its ability information, each PCE be may learn need in the adjacent domains PCE ability information of knowing with the PCE that is kept in the local address tabulation based on local policy.
2) after described this territory PCE receives the address information and affiliated domain identifier thereof of described neighborhood PCE, according to the domain identifier under the described neighborhood PCE judge described neighborhood PCE whether with this territory PCE neighborhood relationships each other;
When this territory PCE does not know whether the address information that receives is neighborhood PCE relevant information, can adopt this step whether to be and this territory PCE neighborhood PCE of neighborhood relationships each other with the pairing PCE of address information that confirms to receive; Certainly, when this territory PCE had known whether the address information that receives is neighborhood PCE relevant information, this step and following affirmation received the step of the address information of described neighborhood PCE and can omit.
3) judging that described neighborhood PCE and this territory PCE each other during neighborhood relationships, confirm the address information of the described neighborhood PCE of reception.
In other embodiments, except that PCE address and affiliated territory id information thereof, automatically the neighborhood PCE information of finding can comprise PCE address fully, it is responsible for address range calculated PCE, disposal ability (as the performance of CPU, the capacity of internal memory), calculate still cross-domain calculating in the support region, the path computing ability of being supported (the wide constraint of tenaculum as whether, maximum cost, maximum jumping figures, whether support decouples computation, load is shared equally, whether support two-way approach), the interface exchange granularity of being supported, type of coding, whether support priority, the largest request message-length of being supported, the maximum request numbers that can carry in the single message or the like.
When local PCE itself had neighborhood (the second net territory) PCE address, above-mentioned steps 101 also can be omitted.
After local PCE obtains or preserves a plurality of neighborhood PCE address, in these PCE addresses, select a suitable PCE address, the PCECP that is established to this second net territory PCE connects.
Certainly, set up at the first net territory PCE under the situation of PCECP connection of arriving this second net territory PCE, can omit this step 101.
Step 102: described this territory PCE by described neighborhood PCE address to described neighborhood PCE transmitting capacity information request;
Be connected when having set up PCECP between local PCE and the described neighborhood PCE, can obtain the various ability information of described neighborhood (the second net territory) PCE by this connection.In application of the present invention, between local PCE request domain, during path computing, can compare and select suitable PCE to send the inter-domain path computation requests according to these PCE ability information that get access to it.Local in this case PCE is also playing the part of the role of path calculating client simultaneously, therefore need know the correlation energy force information of PCE in other territory.Certainly, the application of acquisition capability information of the present invention can have multiple, is not limited to the application that inter-domain path calculates.
In the present embodiment, the method for obtaining neighborhood PCE ability information comprises: adopt the good PCECP of described foundation to connect and send PCCapReq message to described neighborhood PCE, the ability information of acquisition request neighborhood PCE;
In order to realize the capability learning between the PCE, can do certain expansion to existing P CECP agreement, by in the PCECP protocol message of expansion, carrying the mode of the capability requests of described neighborhood PCE, to described neighborhood PCE transmitting capacity information request; Can also return the ability information of described neighborhood PCE by the mode of in the PCECP protocol message of expansion, carrying the ability information of described neighborhood PCE.
Such as increasing PCE capability query and response message newly: PCE Capability RequestMessage (PCCapReq) and PCE Capability Response Message (PCCapRsp) message.
The PCCapReq message format is as follows:
<PCCapReq?Message>∷＝<Common?Header>
<Capability>
[<pce-list>]
The PCCapRsp message format is as follows:
<PCMonRep?Message>∷＝<Common?Header>
<Capability>
[<metric-pce-list>]
Wherein Capability is newly-increased object, is used for describing the ability information of PCE, and its format description is as follows:
Table one: the Capability object in the PCCapRep message of expansion
In the table one, the IPv4 address is the IP address of neighborhood PCE, and this IPv4 address is the neighborhood PCE address that needs query capability information, might not be the PCE address, opposite end that connects;
The Cap type is the PCE capability class, as administration territory scope, processor ability, institute's support path computing capability, the interface exchange granularity of being supported, type of coding, support priority, support maximum message length, support maximum message number or the like;
The Cap value is the specific descriptions for certain type of capability.
Should be appreciated that, the method of initiatively obtaining the ability information of neighborhood PCE can have a variety of, be not limited to by in the PCECP protocol message of expansion, carrying the mode of capability requests/response of described neighborhood PCE, such as in other agreements, carrying described request or response, perhaps in existing message, carry, or in newly-increased message, carry or the like.
Step 103: the ability information that receives the described neighborhood PCE that returns;
After neighborhood PCE receives the ability information request, carry out following operation:
1) judges whether described ability information query requests can be accepted;
2) in the time can accepting, return described neighborhood PCE ability information by above-mentioned newly-increased response message.
Neighborhood PCE checks the parameter in the request message after receiving query requests, be confirmed to be the request that legal PCE sends, receive and inquire about the relevant ability information of this side according to the requirement in the request, and the ability information that inquiry obtains is filled among the above-mentioned newly-increased response message PCCapRsp, then described response message is returned to the PCE in the first net territory.
If described neighborhood PCE preserves other PCE ability information in same net territory (the second net territory), part or all of PCE ability information wherein can be returned to the PCE in the first net territory by response message.Such as, if the IPv4 address field is set to 0 in last table one, indicate to inquire about all PCE ability information in same net territory so.
In addition, local PCE can send Close message and closes this PCECP and connect to setting up neighborhood PCE that PCECP is connected with it, finishes the PCE capability query.
Local PCE extracts PCE ability information wherein after receiving the response message of described neighborhood PCE transmission, can be kept in the local data base.
Be to guarantee the correctness of neighborhood PCE ability information, can periodic refreshing, also promptly regularly carry out step 102～103, also can be by the change situation proactive notification of neighborhood PCE according to local ability information.
Arrive this, finish the flow process of acquisition methods second execution mode of PCE capability information between fields of the present invention.
Below can briefly introduce the concrete application of the PCE ability information that above-mentioned execution mode obtains, such as, utilize described PCE ability information to carry out the path computing cooperation, comprise step:
Step 104: selective power information satisfies the neighborhood PCE that path computing requires;
Local PCE analyzes the ability information of each PCE according to the inter-domain path computation requests of source node, and the satisfactory neighborhood PCE of selective power therein; If can not obtain satisfactory neighborhood PCE, then process ends.
Step 105: send the neighborhood PCE that described path computing request obtains to described selection;
After selecting to obtain the satisfactory neighborhood PCE of ability, send the neighborhood PCE that described inter-domain path computation requests obtains to described selection.
Step 106: and described neighborhood PCE carries out path computing together and returns result of calculation.
After described inter-domain path computation requests sent to the neighborhood PCE that described selection obtains, the path of the neighborhood PCE computation bound node that described selection obtains destination node in the Home Network territory returned to described local PCE, carries out the collaborative operation of calculating with local PCE.
This step can be with reference to existing inter-domain path computational methods, and this paper repeats no more.
In the above-described embodiment, only carrying out issue or the configuration of PCE address and affiliated territory ID thereof between adjacent domains, is only need to communicate with adjacent PCE and consult when calculating the road because PCE cooperates.Local PCE can know which PCE of existence in the adjacent domains, and what the address is.Optionally establish a communications link by the PCECP agreement based on local policy then with the neighborhood PCE that is kept in the local address tabulation, and obtain its ability information, so just may learn, each PCE needs the PCE ability information known in the adjacent domains, improve utilization rate of network resource, the unnecessary network burden of avoiding diffusion way such as inundation to cause.
One of ordinary skill in the art will appreciate that all or part of step in the acquisition methods execution mode of realizing above-mentioned PCE capability information between fields is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program can comprise the content of each execution mode of acquisition methods of aforementioned PCE capability information between fields of the present invention when carrying out.Here the alleged storage medium that gets, as: ROM/RAM, magnetic disc, CD etc.
Consult Fig. 3, the present invention also provides network node PCE first execution mode, shown in this territory network node PCE among Fig. 3.Described PCE comprises capability requests unit 310, ability receiving element 320 and memory cell 330.
Described capability requests unit 310 is used for to neighborhood PCE transmitting capacity information request, concrete on, can be by neighborhood PCE address to described neighborhood PCE transmitting capacity information request.Described neighborhood PCE address can be provided by the address transmitting element 410 of neighborhood PCE, and described ability information request can be received by the first request receiving element 420 of neighborhood PCE.Be connected when having set up PCECP between this PCE and the described neighborhood PCE, can connect to described neighborhood PCE transmitting capacity information request by this.When not set up the PCECP connection, can set up a PCECP and connect to described neighborhood PCE.In order to realize the capability learning between the PCE, can be by in the PCECP protocol message of expansion, carrying the mode of the capability requests of described neighborhood PCE, to described neighborhood PCE transmitting capacity information request.
Described ability receiving element 320 is used to receive the neighborhood PCE ability information of described capability requests unit 310 requests, in the drawings, is to receive the ability information that the ability transmitting element 430 of neighborhood PCE returns.Be connected when having set up PCECP between this PCE and the described neighborhood PCE, the ability transmitting element 430 of neighborhood PCE can connect ability receiving element 320 resettability information to this PCE by this.Can return the ability information of described neighborhood PCE by the mode of in the PCECP protocol message of expansion, carrying the ability information of described neighborhood PCE.And, the ability information of whole PCE of neighborhood can be returned, also can only return the wherein ability information of a part of PCE.
Described memory cell 330 is used to store the neighborhood PCE ability information that described ability receiving element 320 receives.
Above PCE of the present invention first execution mode as can be seen, because the ability information that adopts capability requests unit 310 initiatively optionally to inquire about neighborhood PCE, employing ability receiving element 320 receives the PCE ability information of being asked, realize accurately obtaining, the network blockage that the information inundation of avoiding may cause, reduce the information conveying capacity in the network, therefore reduce network delivery burden; Owing to adopt capability requests unit 310 and ability receiving element 320 optionally to obtain adjacent domains PCE ability information, adopt memory cell 330 to store then again, reduce the maintenance of information amount of local PCE, reduce the complexity that PCE selects; Again and, because point-to-point acquisition capability information, do not carry out the ability diffusion by agreement, can realize that PCE capability information between fields maintains secrecy.
Present embodiment PCE is based on the network node in constraints and network topology computing network path, comprises it can being application program or module, as router, route calculation server etc.Different PCE manages the TE information in the territory separately respectively in can disposing in the TE network.Can also dispose a plurality of PCE in the same territory.Can calculate in response to route needs, and the topological sum TE information of network is injected PCE, and unifies to bear the route calculation task by it.
Also consult Fig. 3, the present invention also provides PCE second execution mode, shown in the proximity network node PCE among Fig. 3.Described PCE comprises address transmitting element 410, first request receiving element 420 and the ability transmitting element 430.
Described address transmitting element 410 is used to send local address to the PCE of foreign lands.Specifically be used for local address only being diffused into the net territory at described foreign lands PCE place, and allow the described PCE of foreign lands obtain described local PCE address by the IGP/BGP agreement.In the drawings, be to send local address to address acquisition unit.
The described first request receiving element 420 is used to receive the ability information request of the described PCE of foreign lands.When the ability transmitting element 430 transmitting capacity information request of the PCE of foreign lands arrived this PCE, the described first request receiving element 420 received the ability information request of the described PCE of foreign lands.
Described ability transmitting element 430 is used for sending local ability information to the described PCE of foreign lands after the described first request receiving element 420 receives described ability information request.In the present embodiment, can return described PCE ability information by the mode of in the PCECP protocol message of expansion, carrying the ability information of the described PCE of foreign lands.In the drawings, be to return described PCE ability information to ability receiving element 320.
Present embodiment can cooperate the ability information request of the PCE of foreign lands, sends local ability information to the described PCE of foreign lands, realizes that the ability of point-to-point is obtained, and alleviates network burden.
Consult this territory network node PCE of Fig. 4, in other embodiments, PCE of the present invention can further include:
Address acquisition unit 340 is used for obtaining described neighborhood PCE address by manual configuration, or obtains the described neighborhood PCE address of spreading by the IGP/BGP agreement, such as the neighborhood PCE address of address transmitting element 410 transmissions of obtaining neighborhood PCE.
In other embodiments, PCE of the present invention can further include:
Unit 350 is set up in first connection, the neighborhood PCE address that is used for obtaining according to described address acquisition unit 340 is asked receiving element 440 to send connection to second of described neighborhood PCE and is set up request, is connected with second of neighborhood PCE then to set up the PCECP connection that unit 450 is established to described neighborhood PCE together.When no PCECP between this PCE and the neighborhood PCE was connected, described first connected and sets up unit 350 and can connect, and is used to carry the ability information request of described capability requests unit 310 outputs.
In other embodiments, PCE of the present invention can further include:
PCE selected cell 360 is used for by analyzing the neighborhood PCE ability information of described memory cell 330, and selective power information satisfies the neighborhood PCE that path computing requires, and realizing route calculates.
Consult the proximity network node PCE of Fig. 4, in other embodiments, described PCE can further include:
The second request receiving element 440 is used to receive the connection foundation request of the described PCE of foreign lands.In the drawings, be to receive first to connect the connection foundation request that unit 350 sends of setting up.
Unit 450 is set up in second connection, be used for after the described second request receiving element 440 receives that request is set up in described connection, be established to the connection of the described PCE of foreign lands, be used for described first request receiving element 420 and ability transmitting element 430 and receive request and transmitting capacity information respectively.In the drawings, described second connects and to set up unit 450 and first and connect and set up unit 350 and set up two connections between the PCE together.
In the present embodiment, described address transmitting element 410 can send local address to neighborhood PCE, also can send the foreign lands PCE of local address to non-neighborhood.
Consult Fig. 5, the present invention also provides a kind of ability deriving means, and described ability deriving means comprises capability requests unit 310 and ability receiving element 320.
Described capability requests unit 310 is used for to described neighborhood PCE transmitting capacity information request; Described ability receiving element 320 is used to receive the PCE ability information of described capability requests unit 310 requests.Described ability deriving means can be arranged among the PCE of TE network, realizes the point-to-point PCE ability information of obtaining, and reduces network burden.
In other embodiments, described ability deriving means can further include:
Unit 350 is set up in first connection, is used for being established to according to neighborhood PCE address the PCECP connection of described neighborhood PCE, and described connection is used to carry the ability information request of described capability requests unit 310 outputs.
In other embodiments, described ability deriving means can further include:
PCE determining unit 370, be used for according to local policy and with the interaction demand of PCE, in a plurality of PCE address, determine the described PCE address that connects used, and be input to described first and connect and set up unit 350.
What deserves to be explained is that the capability requests unit 310 in aforementioned network node PCE first execution mode of the present invention, ability receiving element 320, memory cell 330, first connection are set up unit 350, address acquisition unit 340 and PCE selected cell 360 and can be integrated in the processing module; In like manner, each unit in aforementioned network node PCE second execution mode of the present invention, the ability deriving means also can be integrated in the processing module; Perhaps, any two or more in each unit of aforementioned each execution mode can be integrated in the processing module.
What deserves to be explained is that also in actual applications, network node PCE first execution mode of the present invention and second execution mode can be integrated among the PCE, use as the scene of this territory PCE and neighborhood/PCE of foreign lands respectively.
What deserves to be explained is that also each unit in PCE of the present invention and the ability deriving means execution mode both can adopt the form of hardware to realize, but the part that software is realized can adopt also the form of software function module to realize.Correspondingly, PCE of the present invention and each execution mode of ability deriving means both can be used as independently production marketing or use, sold in the computer read/write memory medium or used but the part that software is realized also can be stored in.
To sum up, the present invention can produce following technique effect at least:
1, improves the network service efficiency, alleviate network burden;
2, alleviate the maintenance of information burden of PCE this locality, reduce the complexity that PCE selects;
3, realize that PCE capability information between fields is secret.
More than acquisition methods, PCE and the ability deriving means of network node PCE ability information between a kind of territory provided by the present invention is described in detail by specific embodiment, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. the acquisition methods of network node PCE ability information between a territory is characterized in that, comprising:
This territory PCE is to neighborhood PCE transmitting capacity information request;
Described this territory PCE receives the ability information that described neighborhood PCE returns;
The ability information that described this territory PCE preserves described neighborhood PCE;
Wherein, described this territory PCE passes through neighborhood PCE address to described neighborhood PCE transmitting capacity information request, described neighborhood PCE address is spread by manual configuration or by the IGP/BGP agreement and is obtained, and described this territory PCE spreads the step that obtains neighborhood PCE address by the IGP/BGP agreement and comprises:
Described neighborhood PCE only spreads self address information and affiliated domain identifier thereof by the IGP/BGP agreement;
After described this territory PCE receives the address information and affiliated domain identifier thereof of described neighborhood PCE, according to the domain identifier under the described neighborhood PCE judge described neighborhood PCE whether with this territory PCE neighborhood relationships each other;
Judging that described neighborhood PCE and this territory PCE each other during neighborhood relationships, confirm the address information of the described neighborhood PCE of reception.
2. method according to claim 1 is characterized in that, before the step of described neighborhood PCE transmitting capacity information request, further comprises: the PCECP that is established to described neighborhood PCE according to described neighborhood PCE address connects.
3. method according to claim 1 is characterized in that, is comprising after the step of described neighborhood PCE transmitting capacity information request:
Judge whether described ability information request can be accepted;
In the time can accepting, carry out the step of the ability information that the described neighborhood PCE of described reception returns.
4. a network node PCE is characterized in that, comprising:
The capability requests unit is used for to neighborhood PCE transmitting capacity information request;
The ability receiving element is used to receive the neighborhood PCE ability information of described capability requests unit requests;
Memory cell is used to store the neighborhood PCE ability information that described ability receiving element receives;
The unit is set up in first connection, is used for being established to according to neighborhood PCE address the PCECP connection of described neighborhood PCE, and described connection is used to carry the ability information request of described capability requests unit output;
Address acquisition unit, be used for obtaining described neighborhood PCE address by manual configuration, or obtain the described neighborhood PCE address of spreading by the IGP/BGP agreement, and offer described first and connect and to set up the unit, wherein, the described described neighborhood PCE address of spreading by the IGP/BGP agreement that obtains can be realized by following steps:
Described neighborhood PCE only spreads self address information and affiliated domain identifier thereof by the IGP/BGP agreement;
After this territory PCE receives the address information and affiliated domain identifier thereof of described neighborhood PCE, according to the domain identifier under the described neighborhood PCE judge described neighborhood PCE whether with this territory PCE neighborhood relationships each other;
Judging that described neighborhood PCE and this territory PCE each other during neighborhood relationships, confirm the address information of the described neighborhood PCE of reception.
5. PCE according to claim 4 is characterized in that, further comprises:
The PCE selected cell is used for by analyzing the neighborhood PCE ability information of described memory cell, and selective power information satisfies the neighborhood PCE that path computing requires.
6. a network node PCE is characterized in that, comprising:
The address transmitting element is used to send local address to neighborhood PCE;
The first request receiving element is used to receive the ability information request of described neighborhood PCE;
The ability transmitting element is used for sending local ability information to described neighborhood PCE after the described first request receiving element receives described ability information request;
Wherein, described address transmitting element specifically is used for by the IGP/BGP agreement local address only being diffused into the net territory at described neighborhood PCE place, so that described neighborhood PCE obtains PCE address, this territory, wherein, describedly local address only is diffused into the net territory at described neighborhood PCE place so that described neighborhood PCE obtains PCE address, this territory can realize by following steps by the IGP/BGP agreement:
This territory PCE only spreads self address information and affiliated domain identifier thereof by the IGP/BGP agreement;
After described neighborhood PCE receives the address information and affiliated domain identifier thereof of described this territory PCE, according to the domain identifier under described this territory PCE judge described this territory PCE whether with neighborhood PCE neighborhood relationships each other;
Judging that described this territory PCE and neighborhood PCE each other during neighborhood relationships, confirm the address information of described this territory PCE of reception.
7. PCE according to claim 6 is characterized in that, further comprises:
The second request receiving element is used to receive the connection foundation request of described neighborhood PCE;
Second connects and to set up the unit, is used for being established to the connection of described neighborhood PCE after the described second request receiving element receives that request is set up in described connection, is used for described first request receiving element and ability transmitting element and receives request and transmitting capacity information respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101270173A CN101325542B (en) | 2007-06-15 | 2007-06-15 | Method for acquiring PCE capability information between fields, PCE and capability-acquiring apparatus |
| PCT/CN2008/071300 WO2008154848A1 (en) | 2007-06-15 | 2008-06-13 | Method for acquiring ability information of net node between domains, net node and communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101270173A CN101325542B (en) | 2007-06-15 | 2007-06-15 | Method for acquiring PCE capability information between fields, PCE and capability-acquiring apparatus |
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| CN101945033B (en) * | 2009-07-08 | 2014-08-13 | 中兴通讯股份有限公司 | Method, device and system for merging/dividing traffic engineering domain |
| CN102036129B (en) * | 2009-09-29 | 2013-06-05 | 中兴通讯股份有限公司 | Method and system for protecting path based on PCE (Patch Computation Element) |
| CN102480406B (en) * | 2010-11-23 | 2014-08-13 | 中兴通讯股份有限公司 | Method and system for building cross-domain end-to-end two-way label switching path |
| CN105704024B (en) * | 2014-11-28 | 2019-10-25 | 南京中兴新软件有限责任公司 | Cross-domain connection method for building up and device |
| CN106572050B (en) * | 2015-10-09 | 2020-03-17 | 中兴通讯股份有限公司 | Capability negotiation method and device |
| FR3081645A1 (en) * | 2018-06-28 | 2019-11-29 | Orange | COMMUNICATION METHOD IMPLEMENTED BY A FIRST ROUTER OF AN AUTONOMOUS SYSTEM USING AN INTERNAL ROUTING PROTOCOL |
| CN111200514A (en) * | 2018-11-20 | 2020-05-26 | 中国移动通信集团有限公司 | Network element information processing method and device, network platform and storage medium |
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| CN1798051A (en) * | 2004-12-24 | 2006-07-05 | 中兴通讯股份有限公司 | Method of network fault recovery crossing over connections in multiple domains |
| CN1870570A (en) * | 2005-05-24 | 2006-11-29 | 华为技术有限公司 | Method for solving resource conflict in distribution route counting |
| CN1949744A (en) * | 2005-10-14 | 2007-04-18 | 华为技术有限公司 | Method for implementing PCE discovery protocol |
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| CN100417117C (en) * | 2005-06-15 | 2008-09-03 | 华为技术有限公司 | Method for recognizing node accessibility in automatically switched optical network |
| US7599302B2 (en) * | 2005-07-19 | 2009-10-06 | Cisco Technology, Inc. | Dynamic enforcement of MPLS-TE inter-domain policy and QoS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1798051A (en) * | 2004-12-24 | 2006-07-05 | 中兴通讯股份有限公司 | Method of network fault recovery crossing over connections in multiple domains |
| CN1870570A (en) * | 2005-05-24 | 2006-11-29 | 华为技术有限公司 | Method for solving resource conflict in distribution route counting |
| CN1949744A (en) * | 2005-10-14 | 2007-04-18 | 华为技术有限公司 | Method for implementing PCE discovery protocol |
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| WO2008154848A1 (en) | 2008-12-24 |
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