CN1283071C - Method for assigning route in network - Google Patents
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Abstract
The present invention discloses a route specifying method in a network. The method comprises the steps that a bearer control entity in a network assigns a path to a user service in a service bearing network, and edge nodes serving the user service in the bearing network are informed of all the label stacks which the path passes through in the service bearing network, wherein the label stacks mark exchange paths; edge nodes at the starting terminal of a service flow press the label stacks into emitted service flow data packets so as to form multi-protocol label exchange packets of a service flow; and nodes in the bearing network forward the multi-protocol label exchange packets of a service flow according to labels configured by the label stacks. The method has the advantages of favorable expandability, network investment protection to the greatest extent, less implementation difficulty, etc.
Description
Technical field
The present invention relates to the route technology in the network, specify the method for route in particularly a kind of network.
Background technology
Along with the continuous increase of Internet scale, various network services are fallen over each other to emerge in large numbers, and advanced multimedia system emerges in an endless stream.Because real time business is comparatively responsive to characteristics such as network transfer delay, delay jitters, when sudden high FTP being arranged on the network or contain the business such as HTTP of image file, real time business will be subjected to very big influence; On the other hand, multimedia service a large amount of bandwidth that accounted for, like this, the key business that existing network will guarantee just is difficult to be transmitted reliably.So miscellaneous service service quality (hereinafter to be referred as QoS) technology is arisen at the historic moment.IETF has advised 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 model (Int-Serv) at the access and the edge of network, uses differentiated service model (Diff-serv) at server.Differentiated service model (Diff-serv) ensures that the QoS measure has the high characteristics of line efficiency though only set priority level, and concrete effect is difficult to prediction.Therefore, industry begins to introduce an independently bearer control layer for backbone network differentiated service Diff-Serv, set up the special Diff-Serv qos signaling mechanism of a cover, as in order to promote the application of Diff-Serv, on the common QBone try net that promotes of IETF and some manufacturers and research institution, utilized bandwidth proxy server (Bandwidth Broker) model is realized Internet resources and Topology Management, has some other manufacturer to propose similar QoS server/explorer technology and manages topological resource and coordinate the QoS ability in each differentiated service Diff-Serv zone.These methods all are to set up a resource management layer specially for Differentiated Services Diff-Serv network, the topological resource of supervising the network, being referred to as this resource management Differentiated Services Diff-Serv mode is the Diff-Serv model that independent bearing control layer is arranged, with reference to shown in Figure 1.
In the Differentiated Services of bearer control layer (Diff-Serv) model is arranged independently, bearer network Control Server (comprising bandwidth broker device (Bandwidth Broker) or QoS server/explorer) has disposed rule and network topology, is client's service bandwidth application Resources allocation.The bearer network Control Server of each management domain transmits client's service bandwidth application request and result each other by signaling, and load network resource manager is the routing information of professional application distribution etc.
When the service bandwidth application of bearer control layer process user, will determine the path of customer service.Load network resource manager CM can notify edge router E to transmit Business Stream according to the path of appointment.
How bearer network realizes that according to the definite path of bearer control layer user traffic flow is by specifying routing forwarding, the existing technology of industry mainly is to utilize multiprotocol label switching (hereinafter to be referred as MPLS) technology at present, use the resource reservation mode to set up label switched path (hereinafter to be referred as LSP), use the demonstration routing mechanism of RSVP-TE or CR-LDP to set up label switched path end to end along the service flow path of bearer control layer appointment.
Present a solution is:
After bearer control layer has distributed bearer path according to user's service bandwidth request,, carry routing informations such as the intermediate router of this Business Stream process and interface by control signaling edge router.Edge router will for current customer service application bandwidth reserved, be set up label switched path end to end by demonstration route (RSVP-TE/CR-LDP) signaling of MPLS.
Consult shown in Figure 2ly, the main process of setting up bearer path end to end by the demonstration route technology of MPLS is as follows:
1, bearer control layer for certain from edge router E1-the path of the customer service flow distribution of E2 is E1-A-B-C-D-E2.
2, this user service flow path of bearer control layer notice edge router E is E1-A-〉B-C-〉D-〉E2, E will and set up a label switched path for this user traffic flow bandwidth reserved: by in RSVP-TE or CR-LDP solicitation message, specify the path A-B-C-of process〉D, can be for the user reserves the bandwidth of application and sets up label switching path LSP end to end, for user traffic flow is distributed the label switched path label.
3, user service flow is stamped the label switched path label into its foundation after entering edge router E1, transmits along the label switched path of setting up according to the path of bearer control layer appointment.
Above-mentioned prior art scheme is representative with the Rich QoS scheme of NEC Corporation.
Though, bearer network adopts MPLS to show that route technology is application establishment of customer service bandwidth or update mark switching path, Business Stream is transmitted in this label switched path when transmitting, and can realize that the Business Stream of bearer network is transmitted according to the path of bearer control layer appointment.But the shortcoming of this method is also apparent in view, can only be applied to the less situation of network size exactly, for the bigger public network of network size, this mode autgmentability is poor, router disposal ability in the middle of the network is required height, and the router in the middle of needing is done upgrading or replacing.This method has obviously brought network cost to raise greatly, and it is big to implement difficulty.
Summary of the invention
The object of the present invention is to provide the method for specifying route in a kind of network, to reduce network cost and to implement difficulty.
The present invention includes step:
Carrying controlled entity in A, the network is customer service specified path in bearer network, and in the notice bearer network this path of fringe node of this customer service initiating terminal of service in bearer network the label stack of all label switched paths (LSP) of process;
The fringe node of B, Business Stream initiating terminal is pressed into described label stack and forms Business Stream multiprotocol label switching bag in the traffic data bag that sends; And
Node in C, the bearer network is according to this Business Stream multiprotocol label switching bag of label forwarding of label stack configuration, and described Business Stream multiprotocol label switching bag is every through a transit node, and the path label of Business Stream reduces one deck.
According to said method:
Described bearer network is the service bearer logical network that planning disposes out on basic network in advance, and this network is connected to form by the label switched path between fringe node, intermediate transit node and the node.
Described intermediate transit point is the part core router in the network resource management zone.
Described label adopts overall label or/and the local label of interface.
When handling the label switched path (LSP) that uses overall label, directly the overall label of this label switched path is put into label stack successively.
Transit node at bearer network sets in advance the label cross connect function, make the Business Stream multi-protocols exchange packets of coming in from interface can by multiprotocol label switching standard repeating process be forwarded to next section appointment use the label switched path (LSP) of the local label of interface or overall label.Can realize the label cross connect function by label interconnection item is set.
The carrying controlled entity is in the label stack process of determining to use according to service flow path, when handling the label switched path (LSP) that adopts the local label of interface in the path, label switched path initiating terminal transit router tag number to the label interconnection item of this label switched path of configuration on this service path inlet is put into label stack.
Among the step C, Business Stream multiprotocol label switching bag is every through a transit node, just process label switched path terminates, the label of this label switched path of expression ejects at this transit node or at the hop router second from the bottom of this label switched path in the Business Stream label stack, and transit node continues to transmit according to the stack top label of next bar label switched path of indication.
The present invention is that user traffic flow is behind specified path on the bearer network at bearer control layer, notice edge router this path in the service bearer network the label stack of all label switched paths of process, in Business Stream initiating terminal (edge router position), once the label stack of the specified Business Stream label switched path correspondence of bearer control layer is pressed in the service flow packet; Transit router for the centre, only need to support the label switched path function of static configuration and common MPLS forwarding capability, Business Stream MPLS bag is every through a transit router, just process label switched path terminates, the label of this label switched path of expression ejects at this transit node hop router second from the bottom of this label switched path (or) in the Business Stream label stack, and transit node continues to transmit according to the stack top label of next bar label switched path of indication.The Business Stream of bearer network just can be transmitted according to the path of bearer control layer appointment like this.
The multistage label stack mode of MPLS of the present invention is for the network equipment of centre, only needs to support the basic forwarding capability of MPLS, need not upgrading or changes, thereby have favorable expandability, to greatest extent protecting network investment and implement advantages such as difficulty is little.
Description of drawings
Fig. 1 is key-course network model schematic diagram independently;
Fig. 2 shows road realization specified path forwarding schematic diagram for adopting MPLS;
Fig. 3 is the service bearer logic net schematic diagram that adopts the MPLS label switched path to set up in the embodiment of the invention;
Fig. 4 is that the bearer control layer in the embodiment of the invention is the schematic diagram of traffic flow assignment route in service bearer logic net;
The schematic diagram that Fig. 5, Fig. 6 use the multistage label stack of overall label to transmit for the present invention;
Fig. 7 uses the label interconnection item schematic diagram of the label switched path of local label in other interface configuration;
The schematic diagram that multistage label stack was transmitted when Fig. 8 used local label for LSP of the present invention;
The schematic diagram that Fig. 9 multistage label stack that local label and LSP the last two jump are ejected for the present invention uses is transmitted;
Figure 10 is a flow chart of the present invention.
Embodiment
Present embodiment is that the service bearer logic net that adopts the MPLS technology to set up the label switched path composition is that the present invention is described in detail for example with the service carrying network.
Consult flow chart shown in Figure 10, carrying controlled entity in the network is customer service specified path in service bearer logic net, and in the notice corresponding service carrying logic net this path of fringe node of this customer service of service in the service bearer network the label stack of all label switched paths (LSP) of process; The fringe node of Business Stream initiating terminal is pressed into described label stack and forms Business Stream multiprotocol label switching bag in the traffic data bag that sends; Node in the service bearer logic net is according to this Business Stream multiprotocol label switching bag of label forwarding of label stack configuration, and described Business Stream multiprotocol label switching bag is every through a transit node, and the path label of Business Stream reduces one deck.
Service bearer logic net is to use the MPLS technology to set up label switched path on basic network to form, and can mark off a plurality of to the requirement of QoS according to different business.Bearer control layer is that user traffic flow is after the online dispense path of this service bearer logic, notice edge router this path in this service bearer network the label stack of all label switched paths of process, in Business Stream initiating terminal (edge router position), once the label stack of the specified Business Stream label switched path correspondence of bearer control layer is pressed in the traffic data bag; Transit router for the centre, only need to support the label switched path function of static configuration and common MPLS forwarding capability, Business Stream MPLS bag is every through a transit router, just process label switched path terminates, the label of this label switched path of expression ejects at this transit node or at the hop router second from the bottom of this label switched path in the Business Stream label stack, and transit node continues to transmit according to the stack top label of next bar label switched path of indication.The Business Stream of bearer network just can be transmitted according to the path of bearer control layer appointment like this.
Consult Fig. 3, service bearer logic net is in order to satisfy real time business to the requirement of service quality and the service bearer network in logic that planning configures on basic network, this service bearer logical network is connected to form by the logic between fringe node, intermediate transit node and the node: wherein edge router E is exactly the fringe node of service carrying network, and some core router RH that can choose in each IP network resource management region are as the intermediate transit node; The label switched path LSP that uses the MPLS technology to set up in advance between node and the node is connected.As using signalings such as RSVP-TE or CR-LSP, in conjunction with the MPLS traffic engineering, the good label switched path of static configuration, and reserve bandwidth and other QoS attributes that good this label switched path designs.These fringe nodes/intermediate transit node and label switched path thereof connect the logical bearers net that has just constituted Business Stream.Dispose a static relatively MPLS logical bearers net and simplified network design, help simplifying the complexity of bearer control layer Resources allocation, help the stable and property easy to maintenance of network, and can with Internet Business Stream separated maintenance and design.
Also can use the label switched path technology of stratification on the net in the MPLS logical bearers, that is to say that the internodal label switched path of fringe node/intermediate transit connects except can also passing through the label switched path of some low logical levels through the physical link of certain router.But the label switched path of these low logical levels is just handled as a kind of tunnel interface on bearer network, do not appear on the service logic bearer network, bearer control layer only need be handled the internodal label switched path of fringe node/intermediate transit and connect, and need not to handle than these label switched paths label switched path of low level more.
Bearer control layer is after of user needs the business application of quality assurance to reserve the path, service conversation flows to into fringe node (edge router), fringe node enters the service logic bearer network by this Business Stream, send from the starting point fringe node, through behind some intermediate transit node routers, the fringe node router of reaching home.Such service conversation stream can be determined by the label switched path of its process is unique, and bearer control layer is responsible on this logical network of being made up of the MPLS label switched path between fringe node/transit node and the node, for service flow path is end to end selected in user's business application.
Bearer control layer is for after the customer service application selected bearer path, the forward-path of certain Business Stream of edge router equipment of notice bearer network adopts the multistage label stack mode of MPLS technology to realize that on bearer network the path mode that Business Stream is formulated according to bearer control layer transmits.Edge router is stamped corresponding business stream IP bag according to the bearer control layer order the multistage label stack of respective path, in Business Stream initiating terminal (edge router position), once the label stack of the specified Business Stream label switched path correspondence of bearer control layer is pressed in the service flow packet; For the transit router of centre, only need to support the label switched path function of static configuration and common MPLS forwarding capability, finish pre-configured label forwarding.Business Stream MPLS bag is every through a transit router, just process label switched path terminates, the label of this label switched path of expression ejects at this transit node or at the hop router second from the bottom of this label switched path in the Business Stream label stack, and transit node continues to transmit according to the stack top label of next bar label switched path of indication.The router of switching is that some label switched paths stop and initial convergence point in the service bearer network, can only need to support the disposal ability of two-stage label stack.The label cross connect function can dispose on the transit node of logical bearers net, with the forwarding that realizes that Business Stream enters next segment mark switching path from a segment mark switching path.
Consult Fig. 4, between two edge router E1 of logical bearers network and the E2 some core routers are arranged.It is Business Stream from edge router E1 to E2 that a customer service is arranged.Bearer control layer for the bearer path of this traffic flow assignment is: edge router E1-LSPa-〉transit router RA-LSPb-〉transit router RB-LSPc-〉transit router RC-LSPd-〉edge router E2.
If at each node, the label that these label switched paths (LSP) are corresponding all is overall label, as: label switching path LSP a is La at the overall label of edge router E1, label switching path LSP b is Lb at the overall label of transit router RA, label switching path LSP c is Lc at the overall label of transit router RB, label switching path LSP d is Ld at the overall label of RC, bearer control layer is determined LSPa-by path so〉LSPb-〉LSPc-〉the MPLS label stack transmitted of LSPd is exactly La/Lb/Lc/Ld, and wherein La is a stack top.
If the router of this path process does not dispose the last two jump ejection function, user traffic flow is carried out the label condition of MPLS forwarding and is consulted Fig. 5 on bearer network: at first, service flow packet arrives edge router E1, edge router E1 carries the order of key-course according to layer, this Business Stream is stamped label La/Lb/Lc/Ld, and wherein La is a stack top.Edge router E1 sends the MPLS of this Business Stream bag along label switching path LSP a.Can be in the middle of the label switching path LSP a through certain router, these routers are only transmitted according to the label of top layer, may carry out the label exchange to top-level tab.
The MPLS bag of Business Stream arrives transit router RA along label switching path LSP a, transit router RA is when making top-level tab and handle, because label switching path LSP a ends at transit router RA, transit router RA will eject the superiors' label, transmit according to second layer label Lb.Like this, Business Stream MPLS wraps in transit router RA and will transmit along label switching path LSP b again, and label stack has reduced one deck;
Equally, the MPLS of Business Stream bag continues to transmit along label switching path LSP b.Can be in the middle of the label switching path LSP b through certain router, these routers are only transmitted according to the label of top layer, may carry out the label exchange to top-level tab.After router RB receives bag, when making top-level tab and handle, because label switching path LSP b ends at transit router RB, transit router RB will eject the superiors' label, transmit according to second layer label Lc.Like this, Business Stream MPLS wraps in transit router RB and will transmit along label switching path LSP c again, and label stack reduces one deck again;
After arriving router RC, when making top-level tab and handle, because label switching path LSP c ends at RC, RC will eject the superiors' label, transmits according to second layer label Ld.Like this, Business Stream MPLS wraps in RC and will transmit along label switching path LSP d again, and the only remaining last one deck of label stack this moment;
May pass through certain router in the middle of the label switching path LSP d, these routers may carry out the label exchange.Business Stream can arrive destination edge router E1 along label switching path LSP d like this.After edge router E2 receives bag,, will eject label, recover the IP bag of Business Stream because label switching path LSP d ends at edge router E2.
In service flow path the last two jump configuration of routers of some label switched paths of process the last two jump At time of eject, the previous router that label switched path stops has just ejected the label of the superiors.Consult shown in Figure 6, the last two jump configuration of routers of label switching path LSP a, LSPb, LSPc the last two jump ejection.
If some label switched path distributed labels is confined to router interface in the path, under the situation as Fig. 4: label switching path LSP b is issued on certain interface X2 at transit router RA, its interface label distribution is Lb, label switching path LSP c is issued on certain interface X3 at transit router RB, its interface label distribution is Lc, label switching path LSP d is issued on certain interface X4 at RC, and its interface label distribution is Ld.In this case, because the label of some label switched paths is defined in interface, bearer control layer can not be simply the local label notice of the interface of each segment mark switching path edge router.
The label cross connect function can dispose on the transit node of logical bearers net, with the forwarding that realizes that Business Stream enters next segment mark switching path from a segment mark switching path.Describe the realization of label cross connect function below with a kind of possible implementation,, also can realize the label cross connect function by other forms according to the actual conditions of each equipment.
There is the transit router of local label need set in advance the input marking mapping table (ILM) of each interface, concrete grammar is as follows: for each uses the label switched path of the local label of interface, in the input marking mapping table (ILM) of other each possible professional incoming interface, increase by one (distribute a new label at this incoming interface, the input marking mapping table of this label point to next jump that label switched path list item that mark forwarding entry table (NHLFE) item just is to use the local label of its interface).This input marking mapping item that we are weighed into interface is a label switched path label interconnection item, realized the MPLS bag of coming in from other interfaces can by MPLS standard repeating process be forwarded to next section appointment use the label switched path of the local label of interface.
Consult Fig. 7, be that setting explains example to label interconnection item with a transit router: this transit router is the initiating terminal of label switching path LSP b, and label switching path LSP b is at port P2, use be the local label Lb of port; What jump that the Np item of mark forwarding entry table NHLFE deposits in next of router is the forwarding information of label switching path LSP b.For being transferred to the label switching path LSP b, goes by the MPLS bag that enters from interface P1, need be in the input marking mapping ILM of interface P1 list item, increase and distribute one, distributed labels is Lb1, and it is Np (forwarding information of LSPb) that next of sensing jumped mark forwarding entry list item; And the like, for being transferred to the label switching path LSP b, goes by the MPLS bag that enters from interface Pm and Pn, need respectively in the input marking mapping ILM of interface Pm and Pn list item, increase and distribute one, distributed labels is respectively Lbm and Lbn, and next of sensing jumped mark forwarding entry list item and be Np (forwarding information of label switching path LSP b).
Bearer network needs to configure label interconnection item for the initiating terminal transit router of those local label switching paths in advance.Bearer control layer is being determined along service flow path in the process of forwarding label stack like this, when handle using the label switching path LSP of local label, will put into the tag number that label switched path initiating terminal transit router disposes successively on this service path incoming interface the bottom of label stack to the label interconnection item of this label switched path.When handling the label switched path that uses overall label, can directly the overall label of this label switched path be put into successively the bottom of label stack.
Is under the local label condition at edge router E1 to the label switching path LSP distributed labels of the service flow path process between the E2: label switching path LSP b is issued on certain interface X2 at transit router RA, its interface label distribution is Lb, label switching path LSP c is issued on certain interface X3 at transit router RB, its interface label distribution is Lc, label switching path LSP d is issued on certain interface X4 at RC, and its interface label distribution is Ld.
Bearer network uses the label switched path configuration interconnection item of local label in advance for these: transit router RA is Lb1 as the interface label to the interconnection item of label switching path LSP b that label switching path LSP a incoming interface distributes, transit router RB is that the interface label to the interconnection item of label switching path LSP c that label switching path LSP b incoming interface distributes is Lc1, and transit router RC is that the interface label to the interconnection item of label switching path LSP d of label switching path LSP c incoming interface distribution is Ld1.
Bearer control layer calculates principle according to label stack, and user traffic flow is LSPa-by path〉LSPb-〉LSPc-〉the MPLS label stack transmitted of LSPd is exactly La/Lb1/Lc1/Ld1, and wherein La is a stack top.Like this, when the label switched path that uses the local label of interface exists, if network does not dispose the last two jump ejection function, user traffic flow shown in Figure 4 is carried out the label condition of MPLS forwarding and is consulted Fig. 8 on bearer network: at first, service flow packet arrives edge router E1, edge router E1 carries the order of key-course according to layer, this Business Stream is stamped label La/Lb1/Lc1/Ld1, wherein La is a stack top, and edge router E1 sends the MPLS of this Business Stream bag along label switching path LSP a.Can be in the middle of the label switching path LSP a through certain router, these routers are only transmitted according to the label of top layer, may carry out the label exchange to top-level tab.
The MPLS bag of Business Stream arrives transit router RA along label switching path LSP a, transit router RA is when making top-level tab and handle, because label switching path LSP a ends at transit router RA, transit router RA will eject the superiors' label, transmit according to second layer label Lb1.Because label Lb1 is a label interconnection item that disposes on this incoming interface for label switching path LSP b, like this, Business Stream MPLS wraps in transit router RA and will transmit along label switching path LSP b again, and top label becomes label Lb, and has reduced one deck;
Equally, the MPLS of Business Stream bag continues to transmit along label switching path LSP b.Can be in the middle of the label switching path LSP b through certain router, these routers are only transmitted according to the label of top layer, may carry out the label exchange to top-level tab.After router RB receives bag, when making top-level tab and handle, because label switching path LSP b ends at transit router RB, transit router RB will eject the superiors' label, transmit according to second layer label Lc1.Equally, because label Lc1 is a label interconnection item that disposes on this incoming interface for label switching path LSP c, like this, Business Stream MPLS wraps in router RB and will transmit along label switching path LSP c again, and top label becomes Lc, and label stack reduces one deck again;
After arriving router RC, when making top-level tab and handle, because label switching path LSP c ends at router RC, router RC will eject the superiors' label, transmits according to second layer label Ld1.Like this, Business Stream MPLS wraps in router RC and will transmit along label switching path LSP d again, and the only remaining last one deck of label stack this moment;
May pass through certain router in the middle of the label switching path LSP d, these routers may carry out the label exchange.Business Stream can arrive destination edge router E2 along label switching path LSP d like this.After edge router E2 receives bag,, will eject label, recover the IP bag of Business Stream because label switching path LSP d ends at edge router E2.
More than be the repeating process of network when not disposing the last two jump ejection function.Label switched path uses repeating process that the last two jump ejects as shown in Figure 9, exactly in the middle of the previous router that stops of every section label switching path LSP just the label of the superiors has been ejected.In the actual logic bearer network, the label that has some label switched paths is the local label of interface, it is overall labels of router that some label switched paths are arranged, label switched path for the local label of interface need dispose corresponding label interconnection item for them on each the possible incoming interface on its initiating terminal transit router.Bearer control layer after routing, need by in the path the label switched path of the local label of use interface of process, select the specified label of transit router incoming interface label interconnection item according to routing information.
For maintaining easily, the label switched path of logical bearers net should use overall label as far as possible.Simultaneously, in order to guarantee service quality, recommend not use the last two jump to eject.
Service carrying network of the present invention is not limited to the service bearer logical network in the present embodiment, for example also can use in the bearer network in the Rich of NEC Corporation QoS scheme.
Claims (8)
1, specify the method for route in a kind of network, it is characterized in that the method comprising the steps of:
Carrying controlled entity in A, the network is customer service specified path in bearer network, and in the notice bearer network this path of fringe node of this customer service initiating terminal of service in bearer network the label stack of all label switched paths (LSP) of process;
The fringe node of B, Business Stream initiating terminal is pressed into described label stack and forms Business Stream multiprotocol label switching bag in the traffic data bag that sends; And
Node in C, the bearer network is according to this Business Stream multiprotocol label switching bag of label forwarding of label stack configuration, and described Business Stream multiprotocol label switching bag is every through a transit node, and the path label of Business Stream reduces one deck.
2, the method for claim 1, it is characterized in that: described bearer network is the service bearer logical network that planning disposes out on basic network in advance, and this network is connected to form by the label switched path between fringe node, intermediate transit node and the node.
3, method as claimed in claim 2 is characterized in that: described intermediate transit point is the part core router in the network resource management zone.
4, the method for claim 1 is characterized in that: described label adopts overall label or/and the local label of interface.
5, method as claimed in claim 4, it is characterized in that: the carrying controlled entity is in the label stack process of determining to use according to service flow path, when handling the label switched path (LSP) that uses overall label, directly the overall label of this label switched path is put into label stack successively.
6, as claim 1 or 4 described methods, it is characterized in that: the transit node at bearer network sets in advance the label cross connect function, make the Business Stream multi-protocols exchange packets of coming in from interface can by multiprotocol label switching standard repeating process be forwarded to next section appointment use the label switched path (LSP) of the local label of interface or overall label.
7, method as claimed in claim 6, it is characterized in that: the carrying controlled entity is in the label stack process of determining to use according to service flow path, when handling the label switched path (LSP) that adopts the local label of interface in the path, label switched path initiating terminal transit router tag number to the label interconnection item of this label switched path of configuration on this service path inlet is put into label stack, and this label interconnection item is the control table entry of realization label cross connect function.
8, the method for claim 1, it is characterized in that among the step C, Business Stream multiprotocol label switching bag is every through a transit node, just process label switched path terminates, the label of this label switched path of expression ejects at this transit node or at the hop router second from the bottom of this label switched path in the Business Stream label stack, and transit node continues to transmit according to the stack top label of next bar label switched path of indication.
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| US10419333B2 (en) | 2014-09-05 | 2019-09-17 | Huawei Technologies Co., Ltd. | Method and apparatus for compressing label stack, and method and apparatus for decompressing label stack |
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|---|---|---|---|---|
| CN100450077C (en) | 2004-09-15 | 2009-01-07 | 华为技术有限公司 | Route repeating method in network |
| CN100365992C (en) * | 2005-01-19 | 2008-01-30 | 华为技术有限公司 | Method of resource consistency management between telecommunication devices |
| CN101990247B (en) * | 2009-08-07 | 2013-08-28 | 华为技术有限公司 | Data transmission method and device and communication system |
| CN105450528B (en) * | 2014-08-29 | 2018-06-08 | 国际商业机器公司 | The method of routing forwarding and corresponding equipment are carried out to data packet |
| CN107241236B (en) * | 2016-03-29 | 2020-11-03 | 华为技术有限公司 | Forwarding information base table item detection method, detection equipment and network equipment |
| WO2018000262A1 (en) * | 2016-06-29 | 2018-01-04 | 广东欧珀移动通信有限公司 | D2d communication method and d2d device |
| CN107872388A (en) * | 2016-09-26 | 2018-04-03 | 中国电信股份有限公司 | For realizing the methods, devices and systems of message forwarding |
| CN109922011B (en) * | 2017-12-13 | 2020-12-04 | 大唐移动通信设备有限公司 | Data processing method and device based on mixed-mode base station |
| CN109962850B (en) * | 2017-12-14 | 2021-10-22 | 中国电信股份有限公司 | Method and controller for implementing segment routing and computer readable storage medium |
| CN109039919B (en) * | 2018-10-11 | 2021-09-21 | 平安科技（深圳）有限公司 | Forwarding path determining method, device, system, computer equipment and storage medium |
-
2003
- 2003-02-20 CN CN 03104066 patent/CN1283071C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10419333B2 (en) | 2014-09-05 | 2019-09-17 | Huawei Technologies Co., Ltd. | Method and apparatus for compressing label stack, and method and apparatus for decompressing label stack |
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| CN1523819A (en) | 2004-08-25 |
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