CN1599328A - Selecting method of path in resource supervisor - Google Patents

Selecting method of path in resource supervisor Download PDF

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Publication number
CN1599328A
CN1599328A CN 03157329 CN03157329A CN1599328A CN 1599328 A CN1599328 A CN 1599328A CN 03157329 CN03157329 CN 03157329 CN 03157329 A CN03157329 A CN 03157329A CN 1599328 A CN1599328 A CN 1599328A
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China
Prior art keywords
resource manager
network resource
load network
territory
manager
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CN 03157329
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Chinese (zh)
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CN100391154C (en
Inventor
陈悦鹏
范灵源
吴登超
许波
隋少帅
徐波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB031573290A priority Critical patent/CN100391154C/en
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to ES04762150T priority patent/ES2344263T3/en
Priority to AT04762150T priority patent/ATE469478T1/en
Priority to JP2006525027A priority patent/JP4476292B2/en
Priority to PCT/CN2004/001015 priority patent/WO2005022824A1/en
Priority to US10/570,477 priority patent/US7818450B2/en
Priority to AU2004302573A priority patent/AU2004302573B2/en
Priority to EP20040762150 priority patent/EP1659729B1/en
Priority to DE200460027390 priority patent/DE602004027390D1/en
Publication of CN1599328A publication Critical patent/CN1599328A/en
Application granted granted Critical
Publication of CN100391154C publication Critical patent/CN100391154C/en
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Abstract

This invention discloses a route selection method in a resource manager: A determining the inter-domain label exchange path with the next hop carrying net resource manager sequently from the source manager and registering the inter-domain label exchange path, starting a service route connecting resource request to the next hop manager and judging if it's the destination manager, if so, step B is carried out, otherwise, this step is carried on. B Beginning from the destination carrying net resource manager, every hop in-domain label exchange path is determined and the inter-domain paths registered by the manager and the in-domain paths are sent to the last manager by a service route resource determine response till to the source one, C, The source one sets up in-domain paths and sends the total paths from the source to the destination to the end office or junction center by flow image order.

Description

The route selecting method of route in a kind of explorer
Technical field
The present invention relates to network communications technology field, the bearer network in internet (internet) is realized route selection technology, the route selecting method of route in particularly a kind of explorer.
Background technology
Along with the continuous expansion of internet (Internet) scale, various network services are fallen over each other to emerge in large numbers, and advanced multimedia system also emerges in an endless stream.Because real time business is comparatively responsive to characteristics such as network transfer delay, delay jitters, when sudden high file transfer (FTP) being arranged on the network or contain the business such as hypertext transmission (HTTP) of image file, real time business will be subjected to very big influence; In addition, because multimedia service will take a large amount of bandwidth, so also will make and need guaranteed key business to be difficult to be transmitted reliably in the existing network.So, to be transmitted reliably for guaranteeing key business, various service quality (QoS, Quality of Service) technology is just arisen at the historic moment.The Internet engineering duty group (IETF, Internet Engineering Task Force) has proposed a lot of service models and mechanism, to satisfy the demand of QoS.What industry was relatively approved at present is to use integrated service (Int-Serv, Integrated Service) model at the access or the edge of network, uses differentiated service (Diff-serv, Differentiated Service) model at server.
The Diff-Serv model only ensures QoS by the measure of setting priority level, though this model has the high characteristics of line efficiency, but concrete effect is difficult to prediction, therefore, industry is that the Diff-Serv model of backbone network has been introduced an independently bearer control layer, set up the special Diff-Serv qos signaling mechanism of a cover, thereby set up a resource management layer specially, with the topological resource of supervising the network for the Diff-Serv network.This resource management Diff-Serv mode is called as the Diff-Serv of independent bearing control layer model.In this model, the bearer network Control Server is responsible for configuration management rule and network topology, is client's service bandwidth application Resources allocation.Transmit client's service bandwidth application request and result between the bearer network Control Server of each management domain by signaling, and load network resource manager is the routing information of professional application distribution etc.
Introduce the method for determining routing iinformation in the prior art below.
Prior art one:
Mode with static routing (Static Routing) is determined in the load network resource manager territory and the service path between the load network resource manager territory.This kind mode is to determine in the method for service path a kind ofly, and static routing is meant in case node has been determined its routing table, and the route of this node will no longer change.
But, this method exists shortcoming: owing to the communication flows of every link in the network always along with the variation of time changes, network node also might break down, variation along with network state, original excellent route may become very bad route, therefore, determine in the load network resource manager territory and professional route between the load network resource manager territory has not only limited the increase of network with static routing, and the destination redundant path can occur arriving.
Prior art two:
The Diff-Serv model scheme of independent bearing control layer shown in Figure 1 is the bandwidth broker device model of the key experimental network of service (QBone).Fig. 1 is the schematic diagram of this model, and wherein, this model comprises service server, belongs to service control layer, can realize functions such as soft switch; The bandwidth broker device belongs to bearer control layer; Office router or tandem exchange's router (ER, Edge Router) and core router, ER and core router all belong to bearer network.Internet has defined the corresponding bandwidth proxy server for each Diff-Serv management domain specially, be that the dedicated bandwidth proxy server has substituted load network resource manager, the bandwidth broker device is responsible for handling from subscriber's main station, perhaps service server, perhaps network maintenance staff's bandwidth application request, the bandwidth broker device is according to the resource reservation situation of current network and configured strategy and the business (SLA) signed with the user, determine whether to allow user's bandwidth application, and give the traffic flow configuration LSP of this user's transmitting-receiving.
Referring to shown in Figure 2, Fig. 2 is the cut-away view of bandwidth broker device in the Diff-Serv model of independent bearing control layer, and it comprises: the territory interface, and the bandwidth broker device of this territory interface and other bearer control layer communicates; User traffic interfaces, this user traffic interfaces and service server, main frame/user and network operation device communicate; Policy interface, this policy interface carries out policy control; Network management interface; Routing iinformation, the routing iinformation in this routing iinformation record bandwidth proxy server territory; Database; Territory inner joint and simple strategy service module, wherein the bandwidth broker device is worked in coordination by its inner module, record the topology information of all kinds of SLA configuration informations, physical network, the configuration information and the policy information of router at it, a large amount of static and dynamic information such as user authentication information, current resource obligate information, network seizure condition information, simultaneously, the bandwidth broker device also needs to write down routing iinformation, to establish in user's load network resource manager territory and service flow path that user's load network resource manager is overseas and cross-domain downstream bandwidth proxy server position.
In the bandwidth broker device model of Fig. 2, the bandwidth broker device is directly managed the resource and the configuration information of the all-router in the load network resource manager zone, exists topological sum to manage too complicated problems; Simultaneously, the bandwidth broker device needs the interregional dynamic routing information of recording carrying net explorer, has the frequent problem of routing table update, causes the instability of network reservation; The professional route that the bandwidth broker device is determined according to the dynamic routing information in this load network resource manager zone also is difficult to consistent with the forwarding route of Business Stream reality.
In the prior art, also have multiple other scheme that comprises the Rich Qos scheme that Japanese NEC Corporation provides, these schemes exist mostly determines routing mode complexity in the load network resource manager territory, is difficult to adapt to the defectives such as needs of large scale network.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for route selection in a kind of explorer, and this method can improve the success rate of route selection.
According to above-mentioned purpose, concrete technical scheme of the present invention is achieved in that
The route selecting method of route in a kind of explorer, this method comprises:
A, from the source load network resource manager, determine between the territory with next jumping load network resource manager label switched path successively and write down label switched path between this territory, jump load network resource manager to next and initiate the request of professional route connection resource, judge simultaneously whether next jumping load network resource manager is the purpose load network resource manager, if, execution in step B, otherwise, continue to carry out this step;
B, from the purpose load network resource manager, determine the territory interior label switching path of each jumping load network resource manager, label switched path between the territory that load network resource manager write down and territory interior label switching path are confirmed that by professional route resource response sends to last one load network resource manager of jumping, up to the source load network resource manager;
C, source load network resource manager are set up load network resource manager territory, source interior label switching path, and will send to office router/tandem exchange's router by the stream mapping directive by the whole label switched path of source load network resource manager arrival purpose load network resource manager.
This method also comprises: Call Agent is initiated the request of professional route connection resource and is given the source load network resource manager.
Comprise in the request of described professional route connection resource: user's internet protocol address, source or domain name, user's purpose internet protocol address or domain name, this type of service, this QoS parameter, routing iinformation and current network conditions.
Described steps A further comprises:
Find the ingress router of corresponding source load network resource manager according to the internet protocol address, source of the user in the request of professional route connection resource, according to routing iinformation and this type of service in the request of professional route connection resource, this QoS parameter, user's purpose internet protocol address or the egress router that domain name is determined the source load network resource manager of source load network resource manager.
Described steps A further comprises:
Select the label switched path between the load network resource manager territory according to the purpose internet protocol address of user in the request of professional route connection resource or domain name, routing iinformation, type of service, QoS parameter, current network conditions, determine that next jumps load network resource manager;
Routing iinformation and this type of service in the request of professional route connection resource, this QoS parameter, user's purpose internet protocol address or the ingress router that domain name is determined next jumping load network resource manager according to load network resource manager.
Described current network conditions is resource operating position and service traffics.
Steps A is described to be determined between territory with next jumping load network resource manager label switched path and writes down that the label switched path process is between this territory:
According to Call Agent initiate professional type of service, resource can use the routing policy of situation, priority and local configuration determine and the territory of next jumping load network resource manager between label switched path, and be recorded in this load network resource manager.
Step B is described to determine that each territory interior label switching path process of jumping load network resource manager is:
Initiating type of service, the resource of business can determine the territory interior label switching path of each jumping load network resource manager with the routing policy of situation, priority and local configuration, and be recorded in this jumping load network resource manager according to Call Agent.
Step B is described to determine that each process of jumping the territory interior label switching path of load network resource manager is: the territory interior label switching path of determining each jumping load network resource manager with the routed path method load network resource manager territory in calculated in advance;
Perhaps determine the territory interior label switching path of each jumping load network resource manager with routed path method in the hop-by-hop calculating load network resource manager territory;
Perhaps determine the territory interior label switching path of each jumping load network resource manager with routing algorithm in the matrix form territory.
Because the network topology structure between the load network resource manager territory is fairly simple, optionally routed path is less, and the network topology structure more complicated in the load network resource manager territory, optionally routed path is more.Therefore, the present invention selects the method for route in the load network resource manager territory again by determining the load network resource manager inter-domain routing earlier, has not only realized route selection in explorer, and has improved the success rate of route selection.
Description of drawings
Fig. 1 is the Diff-Serv structure of models figure of independent bearing control layer.
Fig. 2 is the cut-away view of load network resource manager in the Diff-Serv model of independent bearing control layer.
Fig. 3 carries out the flow chart of route selection in load network resource manager for the present invention.
Fig. 4 carries out the schematic diagram of route selection embodiment in load network resource manager for the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
The present invention adopts above-mentioned Diff-serv model to realize transfer of data on network, and the route of this model bearer control layer comprises signalling route between the load network resource manager and the professional route between the connected node (CN).Determine that the route in the explorer comprises two aspects: be to determine route between each load network resource manager on the one hand, and determine the load network resource manager of next jumping, set up the signalling route path thus; Be that each load network resource manager is that bearing bed is determined the routed path that each is professional on the other hand, set up professional routed path thus.
As shown in Figure 3, Fig. 3 carries out the flow chart of route selection for the present invention in load network resource manager, and its concrete steps are:
Step 300, CA initiate the request of professional route connection resource and give the source load network resource manager, carry this user's purpose Internet protocol (IP) address or domain name in this business route connection resource request;
Step 301, learn that according to this IP address or domain name the business that this CA initiates is inserted by the office router in which load network resource manager/tandem exchange's router, and definite this business is at the egress router of source load network resource manager, the i.e. border router of this source load network resource manager (BR), BR can be according to the type of service of the professional route connection resource request of CA, routing iinformations in service parameter and the source load network resource manager etc. are determined, routing iinformation in this source load network resource manager can be for setting in advance and be stored in the load network resource manager of source, also can report the source load network resource manager, and the source load network resource manager is set to current load network management device by the CN in the load network resource manager of source;
Routing between step 302, current load network resource manager and next jumping load network resource manager territory, when this CA initiates to select route between professional current load network resource manager and next jumping load network resource manager territory, can can determine an available label switched path (LSP) with situation, priority, the routing policy that is disposed and QOS demand according to this professional type of service, resource, in current load network resource manager, be this application bandwidth reserved on this LSP.Current load network resource manager is initiated the request of professional route connection resource and is jumped load network resource manager to next, carries the purpose IP address of jumping ingress router, this professional quality of service (QOS) parameter, type of service and next jumping load network resource manager in load network resource manager inter-domain routing path with next in this request;
Step 303, determine that according to the purpose IP address of the load network resource manager of carrying in this request next jumps load network resource manager ingress router;
Step 304, determine that next jumps the egress router of load network resource manager, this egress router can be determined according to the type of service in the professional route connection resource request of a last jumping load network resource manager, service parameter and the routing iinformation that should jump in the load network resource manager, judge whether this load network resource manager is the purpose load network resource manager, it is office router/tandem exchange's router, if, then change step 306 over to, otherwise, change step 305 over to;
Step 305, with this load network resource manager as current load network resource manager, change step 302 over to;
Step 306, finish between the load network resource manager territory after the LSP routing, jump ingress router and territory inner outlet router in the territory of load network resource manager according to each and determine LSP in its load network resource manager territory, the bandwidth application resource also writes down these LSP resource informations, then self load network resource manager and next are jumped LSP resource that load network resource manager write down and confirm that by professional route connection resource response issues last one and jump load network resource manager together, until responding arrival source load network resource manager;
Step 307, source load network resource manager select in this load network resource manager territory LSP as routed path in the territory, and the source load network resource manager starts the stream mapping directive, issue session id, stream information, QOS parameter, flow descriptor and should business arrive the whole LSP path collection of purpose load network resource manager to ER, thereby realize the load network resource manager route selection that this is professional by former load network resource manager.
The present invention is in carrying out the load network resource manager territory during LSP routing, can adopt different routing algorithms, for example, carry out the routing path calculation method in advance: set up a load network resource manager territory internal routing table in advance, table look-up according to the BR in this load network resource manager territory and ER and determine LSP; The hop-by-hop routing algorithm: with certain CN in the territory is starting point, chooses the LSP of other CN, repeats this process, is certain BR of this management domain up to the egress router of LSP; The Dijakstra algorithm; Bellman-ford algorithm or static configuration algorithm; Matrix form routing algorithm: set up a load network resource manager territory internal routing table in advance, table look-up according to the BR in this load network resource manager territory and select LSP.
The present invention is when carrying out between the load network resource manager territory routing, also can adopt different routing algorithms, for example: the hop-by-hop routing algorithm: with certain BR between the territory is starting point, chooses the LSP of other CN, repeating this process, is the BR of certain load network resource manager up to the egress router of LSP.
Though route selection and load network resource manager inter-domain routing routing are separate in the load network resource manager territory, but inseparable again, promptly a load network resource manager receive that the LSP that should determine after the resource request in this load network resource manager management domain also will determine and the load network resource manager territory of next jumping between LSP.
Lift a specific embodiment explanation the present invention.As shown in Figure 4, Fig. 4 carries out the schematic diagram of route selection embodiment in load network resource manager for the present invention:
Load network resource manager comprises ER1, ER2, BR1 and BR2 in 1 territory, load network resource manager comprises BR3, BR4, ER3 and ER4 in 2 territories, also comprise other CN (not expressing among the figure) in load network resource manager 1 territory He in load network resource manager 2 territories, and the LSP between them (not expressing among the figure).Route between load network resource manager 1 and the load network resource manager 2 comprises LSP11, LSP12, LSP13 and LSP14.
When load network resource manager 1 receive from the IP address be the CA of 10.1.0.0/16 send professional route connection resource request the time, determine that according to the IP address of this request ingress router is ER1, determine that then egress router is BR1, definite foundation can be destination address, type of service and the service parameter of this business route connection resource request.This service parameter can comprise bandwidth requirement and priority requirement etc.Load network resource manager 1 finds that LSP11 and LSP12 can arrive load network resource manager 2, then initiate professional type of service, resource and can determine an available label switched path (LSP) and record with situation, priority, the routing policy that is disposed and QOS demand according to this CA, as to select a LSP11 be the inter-domain routing path of BR1 to BR3, thereby determine that load network resource manager 2 ingress routers are BR3.Load network resource manager 1 is initiated the request of professional route connection resource to load network resource manager 2, and load network resource manager 2 learns that according to the routing iinformation of load network resource manager 2 load network resource manager 2 egress routers are ER4.Then, load network resource manager 1 is selected a LSP and record according to ER1 and BR1, and load network resource manager 2 is according to routed path and record in the territory of a LSP of destination address ER4 selection professional in BR3 and this request.At last, load network resource manager 2 is returned resource request and is responded to load network resource manager 1, comprised the LSP in load network resource manager 2 territories in this response, thereby load network resource manager 1, be the professional routed path that source load network resource manager 1 obtains this CA, realize the load network resource manager route selection of this CA.
Method provided by the invention is applicable to complicated network configuration, route selection can adopt different routing algorithms respectively as the case may be with load network resource manager inter-domain routing routing in the load network resource manager territory, promptly can guarantee carrying out smoothly of professional transmission, can reasonably use the load network resource manager Internet resources again by the signalling route between the load network resource manager territory.This method realizes simple, and is easy to maintenance.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1, the route selecting method of route in a kind of explorer is characterized in that this method comprises:
A, from the source load network resource manager, determine between the territory with next jumping load network resource manager label switched path successively and write down label switched path between this territory, jump load network resource manager to next and initiate the request of professional route connection resource, judge simultaneously whether next jumping load network resource manager is the purpose load network resource manager, if, execution in step B, otherwise, continue to carry out this step;
B, from the purpose load network resource manager, determine the territory interior label switching path of each jumping load network resource manager, label switched path between the territory that load network resource manager write down and territory interior label switching path are confirmed that by professional route resource response sends to last one load network resource manager of jumping, up to the source load network resource manager;
C, source load network resource manager are set up load network resource manager territory, source interior label switching path, and will send to office router/tandem exchange's router by the whole label switched path of source load network resource manager arrival purpose load network resource manager.
2, the method for claim 1 is characterized in that, before described steps A, this method also comprises: Call Agent is initiated the request of professional route connection resource and is given the source load network resource manager.
3, the method for claim 1, it is characterized in that, comprise in the request of described professional route connection resource: user's internet protocol address, source or domain name, user's purpose internet protocol address or domain name, this type of service, this QoS parameter, routing iinformation and current network conditions.
4, method as claimed in claim 3 is characterized in that, described steps A further comprises:
Find the ingress router of corresponding source load network resource manager according to the internet protocol address, source of the user in the request of professional route connection resource, according to routing iinformation and this type of service in the request of professional route connection resource, this QoS parameter, user's purpose internet protocol address or the egress router that domain name is determined the source load network resource manager of source load network resource manager.
5, method as claimed in claim 3 is characterized in that, described steps A further comprises:
Select the label switched path between the load network resource manager territory according to the purpose internet protocol address of user in the request of professional route connection resource or domain name, routing iinformation, type of service, QoS parameter, current network conditions, determine that next jumps load network resource manager;
Routing iinformation and this type of service in the request of professional route connection resource, this QoS parameter, user's purpose internet protocol address or the ingress router that domain name is determined next jumping load network resource manager according to load network resource manager.
6, method as claimed in claim 5 is characterized in that, described current network conditions is resource operating position and service traffics.
7, the method for claim 1 is characterized in that, steps A is described to be determined between territory with next jumping load network resource manager label switched path and write down that the label switched path process is between this territory:
According to Call Agent initiate professional type of service, resource can use the routing policy of situation, priority and local configuration determine and the territory of next jumping load network resource manager between label switched path, and be recorded in this load network resource manager.
8, the method for claim 1 is characterized in that, step B is described to determine that each territory interior label switching path process of jumping load network resource manager is:
Initiating type of service, the resource of business can determine the territory interior label switching path of each jumping load network resource manager with the routing policy of situation, priority and local configuration, and be recorded in this jumping load network resource manager according to Call Agent.
9, the method for claim 1, it is characterized in that step B is described to determine that each process of jumping the territory interior label switching path of load network resource manager is: the territory interior label switching path of determining each jumping load network resource manager with the routed path method load network resource manager territory in calculated in advance;
Perhaps determine the territory interior label switching path of each jumping load network resource manager with routed path method in the hop-by-hop calculating load network resource manager territory;
Perhaps determine the territory interior label switching path of each jumping load network resource manager with routing algorithm in the matrix form territory.
CNB031573290A 2003-09-02 2003-09-18 Selecting method of path in resource supervisor Expired - Fee Related CN100391154C (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CNB031573290A CN100391154C (en) 2003-09-18 2003-09-18 Selecting method of path in resource supervisor
AT04762150T ATE469478T1 (en) 2003-09-02 2004-09-02 METHOD FOR SELECTING A TRANSMISSION PATH FOR REAL-TIME TRAFFIC DATA
JP2006525027A JP4476292B2 (en) 2003-09-02 2004-09-02 Real-time service data transmission line selection method
PCT/CN2004/001015 WO2005022824A1 (en) 2003-09-02 2004-09-02 A method for choosing the transmission path of the real-time traffic data
ES04762150T ES2344263T3 (en) 2003-09-02 2004-09-02 METHOD FOR SELECTING A ROAD OF TRANSMISSION OF SERVICE DATA IN REAL TIME.
US10/570,477 US7818450B2 (en) 2003-09-02 2004-09-02 Method for selecting real-time service data transmission path
AU2004302573A AU2004302573B2 (en) 2003-09-02 2004-09-02 A method for choosing the transmission path of the real-time traffic data
EP20040762150 EP1659729B1 (en) 2003-09-02 2004-09-02 A method for choosing the transmission path of the real-time traffic data
DE200460027390 DE602004027390D1 (en) 2003-09-02 2004-09-02 METHOD FOR SELECTION OF A TRANSMISSION PATH FOR REAL-TIME TRAFFIC DATA

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CNB031573290A CN100391154C (en) 2003-09-18 2003-09-18 Selecting method of path in resource supervisor

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100454830C (en) * 2005-05-20 2009-01-21 华为技术有限公司 Method for realizing path computation in network domain
CN100466613C (en) * 2005-11-21 2009-03-04 华为技术有限公司 Method for processing service
CN100466615C (en) * 2005-12-23 2009-03-04 华为技术有限公司 Method and apparatus for processing direct connected network route

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1758316B1 (en) 2004-06-14 2014-12-24 Huawei Technologies Co., Ltd. Method for ensuring reliability in a network including a separate bearer control layer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3617406B2 (en) * 2000-03-30 2005-02-02 日本電気株式会社 Quality assurance type communication service providing method and service providing method corresponding to multi-domain and service mediating apparatus
DE60102367T2 (en) * 2000-04-13 2005-02-17 Operax Ab NETWORK OPTIMIZATION METHOD
US20030026271A1 (en) * 2001-07-03 2003-02-06 Erb Guy C. L2/L3 network with LSP-enabled virtual routing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100454830C (en) * 2005-05-20 2009-01-21 华为技术有限公司 Method for realizing path computation in network domain
US7978622B2 (en) 2005-05-20 2011-07-12 Huawei Technologies Co., Ltd. Method and apparatus for computing a path in a network domain
CN100466613C (en) * 2005-11-21 2009-03-04 华为技术有限公司 Method for processing service
CN100466615C (en) * 2005-12-23 2009-03-04 华为技术有限公司 Method and apparatus for processing direct connected network route

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