CN101106483A - A method and system for discovering path computing part and the server in this system - Google Patents
A method and system for discovering path computing part and the server in this system Download PDFInfo
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- CN101106483A CN101106483A CNA2006100985884A CN200610098588A CN101106483A CN 101106483 A CN101106483 A CN 101106483A CN A2006100985884 A CNA2006100985884 A CN A2006100985884A CN 200610098588 A CN200610098588 A CN 200610098588A CN 101106483 A CN101106483 A CN 101106483A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/04—Interdomain routing, e.g. hierarchical routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/42—Centralised routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/645—Splitting route computation layer and forwarding layer, e.g. routing according to path computational element [PCE] or based on OpenFlow functionality
Abstract
The invention discloses a discover route computing element (PCE) system and the server in the system, which collects and stores PCE information by the special server. When the server receives PCE inquiry request from the client, the server will return PCE information to the client and realize PCE dynamic discovery. The invention also discloses a method of discovery route computing element and guarantees only the client with route computing request can participate into the course of finding PCE, simply realizes PCE dynamic discovery, greatly saves bandwidth and resources, realizes PCE discovery mechanism in intra-area/inter-area and improves PCE expansibility and is much easier for network configuration. In addition, the invention realizes PCE dynamic discovery of other area by the interactive of server in different areas. The invention also improves the safety of PCE discovery mechanism by authentication mode.
Description
Technical field
The present invention relates to traffic engineering (TE, Traffic Engineering) technology, refer to the service end in method, system and this system of a kind of discovery path computation element (PCE, Path Computation Element) especially.
Background technology
The main purpose of introducing traffic engineering in network is: optimize the utilization of Internet resources, alleviate the congested of network to greatest extent, the network service of high-quality is provided, thereby promote the profitability of operator.Therefore, how better, more effectively in network disposing flux engineering just become the main direction of present flow rate engineering research.Particularly along with the fusion of diverse network, in same network, may there be multiple network equipment, such as: Internet Protocol/multiprotocol label switching router (IP/MPLS Router), time division multiplexing switch (TDM, Time Division Multiplex and Multiplexer), Synchronous Optical Network/synchronous digital level (SDH/SONET), optical cross-connect (OCX, opticalcross-connects) etc., also may appear at not demand of disposing flux engineering etc. between same area, these are all promoting the traffic engineering development of technologies, make universal tag exchange (GMPLS, GeneralizedMultiple Protocol Label Switched), technology such as PCE are arisen at the historic moment.
The key technology of traffic engineering is exactly according to various constraintss, calculates the forward-path that satisfies the demands.Existing traffic engineered path computations model requires all routers that need set up flux engineering route all will participate in calculating, in fact be exactly to require all routers all to want to carry out the calculating in path, these requirements and actual conditions have limited the extensibility and the flexibility of traffic engineering greatly, have brought very big difficulty for the large scale deployment of traffic engineering.The calculating in path generally is to adopt based on shortest path (CSPF) algorithm of constraint to realize.
At present, a kind of traffic engineered path computations model commonly used is based on PCE, and the calculating that is about to the path is separated, finished the calculating in path specially by PCE.In traffic engineered path computations model based on PCE, all need set up the node of flux engineering route as path computing user (PCC, PathComputation Client), calculating to the PCE request path, after PCE finishes path computing, corresponding results is sent to the PCC node, and the PCC node is set up corresponding label switched path (LSP, Label Switch Path) according to result of calculation.
In relevant draft, LSP computation model based on PCE has proposed five kinds of typical application, Fig. 1 is the structural representation that existing LSP computation model typical case based on PCE one of uses, as shown in Figure 1, during using, this adopt a plurality of PCE to participate in the common LSP of calculating path, different PCE is responsible for different calculation tasks, perhaps finishes the calculating in path by the mode cooperation of load balancing in order to improve a plurality of PCE of computing capability.Head-tail node (Head-End) and intermediate node (Intermediate Node) are as PCC, respectively to the PCE path computation request, PCE returns to Head-end and Intermediate Node with the path computing result, Head-end and Intermediate Node set up the LSP path according to the path computing result by relevant signaling such as RSVP (RSVP-TE).
From Fig. 1 as seen, how PCC selects suitable PCE to carry out path computing, is based on the key of the traffic engineered path computations of PCE model.
At present, PCE working group has proposed a kind of based on routing protocol (IS-IS) expansion of Interior Gateway Protocol (IGP) as OSPF (OSPF) or Intermediate System-to-Intermediate System, finds the mechanism of PCE.In an IGP territory, PCE equipment is with self relevant information such as position, computing capability, state and computer capacity etc., (Flood) mechanism that floods by IGP is announced the all-router of giving in the entire domain, each router is preserved the PCE information that receives, so that in the time will carrying out path computing, according to the PCE information of preserving, initiate path computing request to the PCE that sees fit.
OSPF has expanded two types/length/value tlv triple (TLV): PCE and has found message (PCED) TLV and PCE status message (PCES) TLV, and carry PCED and PCES by opaque LSA (opaqueLSA), wherein the type of opaque (type) is 4, indications (ID) is 0, and each TLV has defined a series of sub-TLV (Sub-TLV) again and carried concrete PCE information.
Wherein, PCED mainly comprises: the PCE positional information; The scope that PCE can calculate is as between the different routed domain in the autonomous system between (Inter-area), the different autonomous system between (Inter-domain), the heterogeneous networks level (Inter-layer) etc.; The set that the visible and computable domain information of PCE is a series of territories, just PCE can finish the calculating in the path in these territories; The purpose domain information of PCE is the calculating that PCE may be completed to the path in this purpose territory; The PCE tenability is that PCEP supports which function etc.Here said PCE tenability be meant PCE can only computational fields in the path, maybe can only calculate inter-domain path, or simultaneously in the computational fields and inter-domain path etc.PCES mainly comprises: the information of the current disposal ability of PCE, and as whether reaching capacity, whether can also handling subsequent request etc.
IS-IS also is by expanding two kinds of TLV, and promptly PCED TLV and PCES TLV carry PCED and PCES.
From existing PCE discovery mechanism based on the IGP expansion, this mechanism needs all router supports in IGP the territory in, participates in and find PCE, also will participate in even without the router of any LSP computation requests, like this, has consumed a large amount of bandwidth and resource undoubtedly; And, therefore can only find the PCE in the IGP territory because the IGP extend information can only be transmitted in the IGP territory, and can not find the PCE in other IGP territory, like this, can not realize the foundation of inter-domain flux engineering LSP.
In addition, if dispose new PCE, need the whole network upgrading.And existing PCE discovery mechanism based on the IGP expansion is not considered safety issue.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system that finds path computation element, conserve bandwidth and resource greatly.
Another object of the present invention is to provide the service end in a kind of system that finds path computation element, can collect, store and manage concentratedly PCE information specially.
Another purpose of the present invention is to provide a kind of method of finding path computation element, conserve bandwidth and resource greatly.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of system that finds path computation element PCE, this system comprises:
Service end is used for collecting and storage PCE information, receives the request from client, and PCE information is sent to client;
Client to service end request PCE information, receives the PCE information from server end, selects suitable PCE and initiates path computing request; Reception is from the path computing result of PCE;
PCE is used to carry out path computing; Send the PCE information of self to service end; Reception is from the path computing request of client, and the path computing result is returned client.
Described service end is one or more;
When described service end is one when above, work in the back-up job mode between each service end.
The client that described service end also is used for subtend self request PCE information authenticates.
Described service end also is used for authenticating to the PCE of self transmission PCE information.
This system also comprises: be positioned at the not service end of same area with described service end;
When service end is collected PCE information, with its not the service end of same area will PCE information separately send to the service end of this collection PCE information;
Perhaps when described client-requested PCE information, the service end in this territory, client place is initiated query requests to the service end of described not same area, and the PCE information that obtains is sent to this client.
Described service end is that PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter;
Described client is path computing user PCC.
Service end in a kind of system that finds PCE, this service end is used for collecting and storage PCE information, receives the request from client, and PCE information is sent to client.
The client that described service end also is used for subtend self request PCE information authenticates.
Described service end also is used for authenticating to the PCE of self transmission PCE information.
Described service end is: PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter.
A kind of method of finding path computation element PCE is provided for collecting and storing the service end of PCE information, and this method comprises:
When service end receives PCE query requests from client, PCE information is returned to this client.
The method that described service end is collected PCE information is: in advance in all PCE information in this territory, service end place of described server-side configuration;
Perhaps PCE is by the mode to service end registration, self PCE information is registered in the described service end, and real-time update.
This method also comprises: described client is according to the PCE information that obtains, and the rule that sets in advance according to self is selected suitable PCE, and to the PCE path computation request of choosing, and obtain the path computing result.
At described server-side configuration control strategy and authentication information; This method also comprises:
Described service end is according to described control strategy and authentication information, and the client of subtend self request PCE information authenticates, and after this client of authentication is legal, provides PCE information to this client;
Described service end is according to described control strategy and authentication information, and the PCE that subtend self sends PCE information authenticates, and after this PCE of authentication is legal, collects or upgrade the PCE information of this PCE.
This method also comprises:
When described service end is collected PCE information, with its not the service end of same area will PCE information separately send to the service end of this collection PCE information;
Perhaps when described client-requested PCE information, the service end in this territory, client place to this service end or not of same area initiate query requests, and the PCE information that obtains is sent to this client.
Described service end is one or more; If described service end is more than one, then form the back-up job mode between each service end.
Described service end is that PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter;
Described client is path computing user PCC.
As seen from the above technical solution, the present invention is this to collect and stores PCE information by special service end, and when service end received PCE query requests from client, service end returned to this client with PCE information, realizes the dynamic discovery of PCE.The present invention finds the scheme of PCE, there is the client of path computing request just can participate in the process of finding PCE, realized the dynamic discovery of PCE simply, bandwidth and resource have been saved greatly, and in the territory/realized the PCE discovery mechanism between the territory, improve the autgmentability of PCE, be easier to network design.
In addition, the present invention at mutual between the same area not, has realized comprising the dynamic discovery to the PCE in other territory by service end; The present invention also passes through authentication mode, the fail safe that has improved the PCE discovery mechanism.
Description of drawings
Fig. 1 is the structural representation that existing LSP computation model typical case based on PCE one of uses;
Fig. 2 is the system schematic that the present invention finds the embodiment of PCE.
Embodiment
Core concept of the present invention is: service end is set, and in service end storage PCE information, when service end receives PCE query requests from client, PCE information is returned to this client, realize the dynamic discovery of PCE.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
The present invention finds that the system of PCE comprises PCE, service end and client, wherein,
(1) service end is used for collecting and storage PCE information such as PCED and PCES information, and offers the client of request PCE information.Service end can be special server-PCE find automatically server (PDS), also can be certain PCE, can also be based on the expansion of present widely used remote customer dialing authentication system (Radius), " diameter " Verification System (Diameter).
Need to prove, the collected PCE information of service end is the PCE information in all " as seen " scopes of service end, what is called as seen, be exactly that service end can be according to the IP address of client, only send the operable PCE information of this IP address clients corresponding, such as store ten PCE information in service end, control strategy such as IP address can be on service end, disposed and be the client of 1.1.1.1 and the first five PCE can only be used, like this, when this IP address clients corresponding request PCE information, service end only needs that the first five PCE information is sent to this client and gets final product.The present invention is this according to pre-configured control strategy, only sends the PCE information that satisfies control strategy to client, has controlled the visible range of PCE so well, has improved fail safe.
Service end is collected PCE information can realize that wherein, the manual configuration mode is by the mode of manual configuration and the mode of PCE dynamic registration: in advance in all PCE information in this territory, service end place of server-side configuration; PCE dynamic registration mode is: PCE is by the mode to the service end registration, be registered to the relevant information of self in the service end dynamically, and can be according to the actual conditions real-time update, when changing such as the PCEP tenability, can be by the re-registration notification service end, at this moment service end can send to the information after this renewal to the client of self asking PCE information by the mode of broadcasting, perhaps all the client broadcasting in this territory.
Further, in the territory a plurality of service ends can be set, make service end be in the back-up job mode, guarantee the service quality of service end.The back-up job mode belongs to technology as well known to those skilled in the art, as 1+1 backup, redundancy backup etc., repeats no more here, and what emphasize is to find in the system of PCE that in the present invention service end can adopt the back-up job mode, to guarantee the service quality of service end.
(2) client is used for the information to service end request PCE, according to the PCE information that obtains, selects suitable PCE in conjunction with the rule of self, and initiates path computing request to the PCE that chooses, thereby obtain the path computing result.Client can be PCC.
So-called rule in conjunction with self selects the method for suitable PCE to be: carry out the selection of PCE such as PCC according to the disposal ability of all PCE that find, the information such as weight that PCC arrives the route of PCE, need to prove, how PCC selects PCE not belong to category of the present invention, no longer describes in detail here.
Further, can dispose relevant control strategy and authentication information in service end, like this, when client during to service end request PCE information, service end is according to pre-configured relevant control strategy and authentication information, this client is authenticated, and after this client of authentication is legal, provide PCE information to this client.In addition, PCE by the dynamic registration mode when service end provides the relevant information of self, service end at first can authenticate this PCE according to pre-configured relevant control strategy and authentication information, and after this PCE of authentication is legal, collect or upgrade the PCE information of this PCE.Need to prove that the method for authentication belongs to prior art, what emphasize here is that the present invention finds that the system of PCE provides authentication function, has guaranteed the fail safe of PCE discovery mechanism.
Further, client need obtain the PCE information in other territory as the client that is in the border, can initiate query requests to the service end in other territory by the service end in self territory, place, and service end obtains to send to this client after the PCE information.In addition, utilize PCE separately to come calculating path if not consulted between the operator of same area to be correlated with, so, when service end is collected PCE information, the service end between same area can not send to the other side with PCE information separately, do not stored the PCE information in self and other territory like this in the service end of same area, if be in the PCE information that the client on border need obtain other territory, the PCE information acquisition of storing in can service end by self territory, place.The present invention by service end at mutual between the same area not, the PCE in other territory that made client terminal to discover, and can select the PCE in other territory to carry out path computing.
Adopt the system and method for discovery PCE of the present invention, there is the client of path computing request just can participate in the process of finding PCE, realized the dynamic discovery of PCE simply, bandwidth and resource have been saved greatly, and in the territory/realized the PCE discovery mechanism between the territory, improve the autgmentability of PCE, be easier to network design.
In addition, the present invention at mutual between the same area not, has realized comprising the dynamic discovery to the PCE in other territory by service end; The present invention also passes through authentication mode, the fail safe that has improved the PCE discovery mechanism.
Fig. 2 is the system schematic that the present invention finds the embodiment of PCE, and as shown in Figure 2, it is autonomous system 1 (AS1) and AS2 that two different territories are arranged, and in AS1, is provided with main PDS1, is equipped with PDS1, PCE1, PCE2, PCC1～PCC6; In AS2, be provided with main PDS2, be equipped with PDS2, PCE3, PCC7～PCC9; Under the normal condition, main PDS work.
Suppose at main PDS1 and be equipped with the relevant information that has all stored PCE1 and PCE2 among the PDS1, at main PDS2 be equipped with the relevant information that has all stored PCE3 among the PDS2; Suppose that PCC1 need carry out path computing, so,
PCC1 sends the PCE query requests to main PDS1, carries the sign that whether needs the PCE in other territory information in this query requests, to obtain relevant PCE information; Main PDS1 returns to PCC1 with relevant PCED and PCES information; After PCC1 obtains these PCED and PCES information, according to the rule of self, select suitable PCE such as PCE1, and initiate path computing request to PCE1, PCE1 returns to PCC1 with the path computing result after finishing path computing.Here need to prove that method of the present invention is to find PCE, in case PCC has obtained PCE information, just think that PCC has found PCE, the PCE that follow-up selection is suitable and calculate to the PCE request path and to be prior art, implementation method can no longer describe in detail here referring to related protocol or draft.
PCE also can initiate the PCE query requests to service end, to obtain other PCE information, like this, helps PCE and finishes path computing better.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a system that finds path computation element PCE is characterized in that, this system comprises:
Service end is used for collecting and storage PCE information, receives the request from client, and PCE information is sent to client;
Client to service end request PCE information, receives the PCE information from server end, selects suitable PCE and initiates path computing request; Reception is from the path computing result of PCE;
PCE is used to carry out path computing; Send the PCE information of self to service end; Reception is from the path computing request of client, and the path computing result is returned client.
2. system according to claim 1 is characterized in that, described service end is one or more; When described service end is one when above, work in the back-up job mode between each service end.
3. system according to claim 1 is characterized in that, the client that described service end also is used for subtend self request PCE information authenticates.
4. according to claim 1 or 3 described systems, it is characterized in that described service end also is used for authenticating to the PCE of self transmission PCE information.
5. system according to claim 1 is characterized in that, this system also comprises: be positioned at the not service end of same area with described service end;
When service end is collected PCE information, with its not the service end of same area will PCE information separately send to the service end of this collection PCE information;
Perhaps when described client-requested PCE information, the service end in this territory, client place is initiated query requests to the service end of described not same area, and the PCE information that obtains is sent to this client.
6. system according to claim 1 is characterized in that,
Described service end is that PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter;
Described client is path computing user PCC.
7. the service end in the system that finds PCE is characterized in that this service end is used for collecting and storage PCE information, receives the request from client, and PCE information is sent to client.
8. service end according to claim 7 is characterized in that, the client that described service end also is used for subtend self request PCE information authenticates.
9. according to claim 7 or 8 described service ends, it is characterized in that described service end also is used for authenticating to the PCE of self transmission PCE information.
10. service end according to claim 7 is characterized in that, described service end is: PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter.
11. a method of finding path computation element PCE is characterized in that, is provided for collecting and storing the service end of PCE information, this method comprises:
When service end receives PCE query requests from client, PCE information is returned to this client.
12. method according to claim 11 is characterized in that, the method that described service end is collected PCE information is: in advance in all PCE information in this territory, service end place of described server-side configuration;
Perhaps PCE is by the mode to service end registration, self PCE information is registered in the described service end, and real-time update.
13. method according to claim 11, it is characterized in that this method also comprises: described client is according to the PCE information that obtains, and the rule that sets in advance according to self is selected suitable PCE, and to the PCE path computation request of choosing, and obtain the path computing result.
14. method according to claim 11 is characterized in that, at described server-side configuration control strategy and authentication information; This method also comprises:
Described service end is according to described control strategy and authentication information, and the client of subtend self request PCE information authenticates, and after this client of authentication is legal, provides PCE information to this client;
Described service end is according to described control strategy and authentication information, and the PCE that subtend self sends PCE information authenticates, and after this PCE of authentication is legal, collects or upgrade the PCE information of this PCE.
15. method according to claim 11 is characterized in that, this method also comprises:
When described service end is collected PCE information, with its not the service end of same area will PCE information separately send to the service end of this collection PCE information;
Perhaps when described client-requested PCE information, the service end in this territory, client place to this service end or not of same area initiate query requests, and the PCE information that obtains is sent to this client.
16. method according to claim 11 is characterized in that, described service end is one or more; If described service end is more than one, then form the back-up job mode between each service end.
17. method according to claim 11 is characterized in that,
Described service end is that PCE finds server PDS automatically; The perhaps expansion of PCE; Perhaps based on the expansion of the Radius of remote customer dialing authentication system, diameter Verification System Diameter;
Described client is path computing user PCC.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100985884A CN100546259C (en) | 2006-07-12 | 2006-07-12 | Service end in a kind of method, system and this system that finds path computation element |
| PCT/CN2007/000322 WO2008009185A1 (en) | 2006-07-12 | 2007-01-29 | A method, system and the server side of the system for discovering the path computation element |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100985884A CN100546259C (en) | 2006-07-12 | 2006-07-12 | Service end in a kind of method, system and this system that finds path computation element |
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| CN101106483A true CN101106483A (en) | 2008-01-16 |
| CN100546259C CN100546259C (en) | 2009-09-30 |
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| CNB2006100985884A Expired - Fee Related CN100546259C (en) | 2006-07-12 | 2006-07-12 | Service end in a kind of method, system and this system that finds path computation element |
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| CN (1) | CN100546259C (en) |
| WO (1) | WO2008009185A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394768A (en) * | 2011-10-11 | 2012-03-28 | 中兴通讯股份有限公司 | Method and device for re-optimizing tunnel path |
| WO2013023508A1 (en) * | 2011-08-16 | 2013-02-21 | Huawei Technologies Co., Ltd. | Method of communicating in path computation element communication protocol and network apparatus |
| CN103188150A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Path determination method and path determination device |
| CN103188087A (en) * | 2011-12-27 | 2013-07-03 | 中兴通讯股份有限公司 | Upgrade processing method and upgrade processing device |
| CN103532849A (en) * | 2012-07-06 | 2014-01-22 | 中兴通讯股份有限公司 | Method for calculating frequency-spectrum time-sequence channel, path calculating unit and nodes |
| CN103856488A (en) * | 2008-05-13 | 2014-06-11 | 华为技术有限公司 | Device ability interacting method and system, and devices |
| WO2014187283A1 (en) | 2013-10-25 | 2014-11-27 | 中兴通讯股份有限公司 | Method, apparatus and system for discovering path computation element |
| CN105763447A (en) * | 2014-12-16 | 2016-07-13 | 中兴通讯股份有限公司 | Label switching path state acquisition method and apparatus thereof |
| CN108075939A (en) * | 2016-11-17 | 2018-05-25 | 中国电信股份有限公司 | Network quality detecting system and method |
| CN110546986A (en) * | 2017-03-28 | 2019-12-06 | 甲骨文国际公司 | methods, systems, and computer readable media for message flooding mitigation during access node-gateway (AN-GW) unavailability and after AN-GW recovery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301220A (en) * | 2013-07-18 | 2015-01-21 | 中兴通讯股份有限公司 | Path computation elements, path computation client-terminal and load sharing method and system |
| CN108881368A (en) * | 2018-04-22 | 2018-11-23 | 平安科技（深圳）有限公司 | High concurrent service request processing method, device, computer equipment and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317566A (en) * | 1993-08-18 | 1994-05-31 | Ascom Timeplex Trading Ag | Least cost route selection in distributed digital communication networks |
| JP2000250878A (en) * | 1999-02-25 | 2000-09-14 | Nec Corp | Load distribution system |
| US8131873B2 (en) * | 2004-11-05 | 2012-03-06 | Cisco Technology, Inc. | Technique for selecting a path computation element |
| US7558276B2 (en) * | 2004-11-05 | 2009-07-07 | Cisco Technology, Inc. | System and method for retrieving computed paths from a path computation element using a path key |
-
2006
- 2006-07-12 CN CNB2006100985884A patent/CN100546259C/en not_active Expired - Fee Related
-
2007
- 2007-01-29 WO PCT/CN2007/000322 patent/WO2008009185A1/en active Application Filing
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|---|---|---|---|---|
| CN103856488A (en) * | 2008-05-13 | 2014-06-11 | 华为技术有限公司 | Device ability interacting method and system, and devices |
| CN103856488B (en) * | 2008-05-13 | 2017-02-22 | 华为技术有限公司 | Device ability interacting method and system, and devices |
| CN103650453B (en) * | 2011-08-16 | 2016-08-17 | 华为技术有限公司 | The method communicated in path computation element communication protocol and network equipment |
| WO2013023508A1 (en) * | 2011-08-16 | 2013-02-21 | Huawei Technologies Co., Ltd. | Method of communicating in path computation element communication protocol and network apparatus |
| CN103650453A (en) * | 2011-08-16 | 2014-03-19 | 华为技术有限公司 | Method of communicating in path computation element communication protocol and network apparatus |
| CN102394768A (en) * | 2011-10-11 | 2012-03-28 | 中兴通讯股份有限公司 | Method and device for re-optimizing tunnel path |
| CN103188087A (en) * | 2011-12-27 | 2013-07-03 | 中兴通讯股份有限公司 | Upgrade processing method and upgrade processing device |
| CN103188150A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Path determination method and path determination device |
| CN103532849A (en) * | 2012-07-06 | 2014-01-22 | 中兴通讯股份有限公司 | Method for calculating frequency-spectrum time-sequence channel, path calculating unit and nodes |
| CN103532849B (en) * | 2012-07-06 | 2018-10-23 | 中兴通讯股份有限公司 | A kind of method, path-calculating element and node calculating frequency slot channel |
| CN104579947A (en) * | 2013-10-25 | 2015-04-29 | 中兴通讯股份有限公司 | Method and device for finding path computation element as well as system |
| EP3062472A4 (en) * | 2013-10-25 | 2016-09-21 | Zte Corp | Method, apparatus and system for discovering path computation element |
| WO2014187283A1 (en) | 2013-10-25 | 2014-11-27 | 中兴通讯股份有限公司 | Method, apparatus and system for discovering path computation element |
| CN105763447A (en) * | 2014-12-16 | 2016-07-13 | 中兴通讯股份有限公司 | Label switching path state acquisition method and apparatus thereof |
| CN108075939A (en) * | 2016-11-17 | 2018-05-25 | 中国电信股份有限公司 | Network quality detecting system and method |
| CN108075939B (en) * | 2016-11-17 | 2020-06-09 | 中国电信股份有限公司 | Network quality detection system and method |
| CN110546986A (en) * | 2017-03-28 | 2019-12-06 | 甲骨文国际公司 | methods, systems, and computer readable media for message flooding mitigation during access node-gateway (AN-GW) unavailability and after AN-GW recovery |
| CN110546986B (en) * | 2017-03-28 | 2022-10-28 | 甲骨文国际公司 | Methods, systems, and computer readable media for message flooding mitigation during access node-gateway (AN-GW) unavailability and after AN-GW recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008009185A1 (en) | 2008-01-24 |
| CN100546259C (en) | 2009-09-30 |
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