CN101588288B

CN101588288B - Configuration method, communication equipment and communication system of link attribute information

Info

Publication number: CN101588288B
Application number: CN2008100932890A
Authority: CN
Inventors: 资小兵; 郭大勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-05-19
Filing date: 2008-05-19
Publication date: 2012-02-22
Anticipated expiration: 2028-05-19
Also published as: WO2009140873A1; CN101588288A

Abstract

The embodiment of the invention discloses a configuration method, communication equipment and a communication system of link attribute information, wherein the configuration method comprises the following steps: a node of a second network generates the link attribute information of a transmitted adjacent label switched path according to network topology information of the second network and the transmitted adjacent label switched path; and the node of the second network transmits the link attribute information to a first node and/or a second node of a first network so as to ensure that the first node and the second node in the first network are linked through the transmitted adjacent label switched path. The embodiment of the invention can realize the automatic configuration of the link attribute information without manually inquiring the link attribute information from the second network and configuring the link attribute information onto the nodes of the first network, thereby improving the configuration speed and the efficiency of the link attribute information and avoiding mistakes caused by manually configuring the FA-LSP link attribute information.

Description

The collocation method of link attribute information, communication equipment and communication system

Technical field

The present invention relates to the communication technology, especially a kind of collocation method of link attribute information, communication equipment and communication system.

Background technology

Multiprotocol label switching (Multi-Protocol Label Switching Traffic Engineering in the band traffic engineering; Hereinafter to be referred as: MPLS-TE) in the network; Can pass through signaling protocol; For example: the RSVP of band traffic engineering (Resource Reservation Protocol with TE, hereinafter to be referred as: RSVP-TE), come to set up automatically label switched path (Label Switch Path; Hereinafter to be referred as: LSP), user service data is sent to another node from a node.Different user service datas to the LSP parameter require inequality.For example: for voice call (Voice over Internet Protocol, hereinafter to be referred as: VoIP), real time business data such as video, require the time delay of LSP can not be oversize; And, need to guarantee data transmission quality for important business data, then possibly set up two paths shared risk link group (Shared Risk Link Group; Hereinafter to be referred as: the LSP that SRLG) separates; For same business provides data transport service, because the probability that the LSP of two separation breaks down simultaneously is less, through SRLG; Can, the network somewhere effectively ensure the safe transmission of user service data when breaking down.

SRLG is meant the link of sharing some physical resource in the optical-fiber network, and for example: share physical resources such as physical node, optical cable, in case this sharing means that shared resource breaks down, these links are with breaking down simultaneously.For example: have K bar optical fiber link all to pass through same seat bridge, K is the integer greater than 1, and then this K bar optical fiber link is affected at the bridge Shi Douhui that broken.

In multilayer or multiple-domain network, the client side network can ask the serve side network that the connection of serve side network is provided, and can between client side network two-end-point, form adjacency through this connection.The client side network endpoint use general MPLS RSVP-TE (Generalized RSVP-TE, hereinafter to be referred as: GMPLS RSVP-TE) the request connection of setting up be called forwarding adjacency LSP (Forwarding Adiacency LSP, hereinafter to be referred as: FA-LSP).

After FA-LSP sets up and accomplishes; When in the client side network, setting up LSP; Can this FA-LSP be used as a link between two adjacent nodes in the client side network, calculate a LSP who satisfies certain constraints according to link attribute informations such as the time delay of this link, SRLG.But because FA-LSP is the connection that the serve side network provides, the client side network does not have the serve side network topological information, therefore can't know the link attribute informations such as time delay, SRLG of this FA-LSP.

In the prior art; After FA-LSP sets up completion; By link attribute informations such as the time delay of keeper this FA-LSP of artificial enquiry from the serve side network, SRLG; And human configuration on the first node in two adjacent nodes, is published to this FA-LSP in the client side network as a link of end-node in first node to two adjacent node by this head node in the client side network.If this FA-LSP is two-way; Then also need the link attribute information such as time delay, SRLG of human configuration FA-LSP on the end-node of keeper in the client side network, end-node also can be published to this FA-LSP in the client side network as the link of end-node to first node.Owing to need the link attribute information such as time delay, SRLG of keeper's artificial enquiry FA-LSP and be configured on the node in the client side network, efficient is lower, and speed is slower, and easily the people for makeing mistakes.

Summary of the invention

Embodiment of the invention technical problem to be solved is: in multilayer or multiple-domain network; After FA-LSP in one of them network sets up and accomplishes; Can send the link attribute information of this FA-LSP from the node in other network of trend; Thereby improve the configuration speed and the efficient of link attribute information, and avoid artificially disposing the mistake that the link attribute information of FA-LSP causes.

An aspect of the embodiment of the invention, the collocation method of a kind of link attribute information that provides comprises:

Node in second network generates the link attribute information of said forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;

Node in said second network sends to first node and/or Section Point in first network with said link attribute information, makes first node and Section Point in said first network carry out adjacency through said forwarding adjacency label switched path.

Another aspect of the embodiment of the invention, a kind of communication equipment that provides is positioned at first network, comprising:

Receiver module is used for receiving the link attribute information of the forwarding adjacency label switched path that the node of second network sends, and according to said link attribute information, another communication equipment foundation in said communication equipment and said first network is in abutting connection with switching path;

Sending module is used for the basis link information of storage in advance, and the node in said second network sends the path request message or the path of carrying the request of obtaining and replys message, the said link attribute information of asking to be used to obtain the forwarding adjacency label switched path that obtains.

Another aspect of the embodiment of the invention, the another kind of communication equipment that provides is positioned at second network, comprising:

Information generating module is used for generating the link attribute information of said forwarding adjacency label switched path according to forwarding adjacency label switched path and the said second network of network topology information of storing in advance;

Information sending module, the link attribute information that is used for sending to the first node of first network and/or Section Point the forwarding adjacency label switched path that said information generating module generates makes first node and Section Point in said first network carry out adjacency through said forwarding adjacency label switched path.

Another aspect of the embodiment of the invention, a kind of communication system that provides comprises first communication equipment and the second communication equipment in the third communication equipment and second network in first network;

Said second communication equipment generates the link attribute information of said forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;

Said second communication equipment sends to said first communication equipment or said third communication equipment with said link attribute information; According to said link attribute information, said first communication equipment and said third communication equipment are through said forwarding adjacency label switched path adjacency;

Said second communication equipment comprises:

Information sending module is used for sending to said first communication equipment or the third communication equipment link attribute information of the forwarding adjacency label switched path that said information generating module generates;

Information receiving module is used to receive path request message or the path that the sending module of said first communication equipment sends and replys message, and replys the message from said path request message or path and to parse the request of obtaining;

According to said link attribute information, said first communication equipment and third communication equipment are through said forwarding adjacency label switched path adjacency;

Said first communication equipment comprises:

Receiver module is used to receive the link attribute information of the forwarding adjacency label switched path that said information sending module sends;

Sending module; Be used for the basis link information of storage in advance; Send the path request message or the path of carrying the request of obtaining to said second communication equipment and reply message, the said request of obtaining is used for obtaining to said second communication equipment the link attribute information of forwarding adjacency label switched path.

In the embodiment of the invention; Node in second network is after FA-LSP sets up completion; Can generate the link attribute information of FA-LSP, and initiatively send to first node or the Section Point in first network according to this second network of network topology information and FA-LSP information; Realized the automatic configuration of link attribute information; Do not need artificial from second network inquiry link attribute information and being configured on the node in first network, thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.

Through accompanying drawing and embodiment, the technical scheme of the embodiment of the invention is done further detailed description below.

Description of drawings

Fig. 1 is the flow chart of an embodiment of collocation method of link attribute information of the present invention.

Fig. 2 is the flow chart of another embodiment of collocation method of link attribute information of the present invention.

Fig. 3 is a kind of application scenarios networking structure sketch map of the embodiment of the invention.

Fig. 4 is the flow chart of an application implementation example of the collocation method of link attribute information of the present invention.

Fig. 5 is the flow chart of the Another application embodiment of the collocation method of link attribute information of the present invention.

Fig. 6 is the another kind of application scenarios networking structure sketch map of the embodiment of the invention.

Fig. 7 is the structural representation of communication equipment embodiment one of the present invention.

Fig. 8 is the structural representation of communication equipment embodiment two of the present invention.

Fig. 9 is the structural representation of communication equipment embodiment three of the present invention.

Figure 10 is the structural representation of communication equipment embodiment four of the present invention.

Embodiment

In the embodiment of the invention; Node in second network is after FA-LSP sets up completion; According to this second network of network topology information and FA-LSP information; Generate the link attribute information of FA-LSP, and initiatively the link attribute information of this FA-LSP is sent to first node or Section Point in first network.Make first node and Section Point in first network carry out adjacency through this FA-LSP.

Wherein, first node is also referred to as first node, and Section Point is also referred to as end-node.First network and second network are two heterogeneous networks in multilayer or the multiple-domain network.When two nodes in first network directly do not have direct link to link to each other; The connection that provides through second network links to each other; Second network can provide connection for any two nodes in first network, and two nodes in first network can form adjacency through this connection between two nodes of this first network.First network such as client side network, second network is like service survey grid network.The link attribute information of FA-LSP specifically can comprise one or more in the information of all expression link attributes such as the time delay, SRLG information of link.

Node in second network is after FA-LSP sets up completion; Can be according to this second network of network topology information and FA-LSP; Generate the link attribute information of FA-LSP; And initiatively send to first node or the Section Point in first network, realized the automatic configuration of link attribute information, do not need artificial from second network inquiry link attribute information and being configured on the node in first network; Thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.

As shown in Figure 1, be the flow chart of the embodiment of collocation method of link attribute information of the present invention, it may further comprise the steps:

Step 101, the first node in first network ingress in second network sends the request of obtaining, and this request of obtaining is used to obtain the link attribute information of FA-LSP, and first node in first network and end-node are through the FA-LSP adjacency.

Particularly, the first node in first network can be carried on the request of obtaining in path request (Path) message and send to the ingress in second network.

Step 102, first node receive the link attribute information of the FA-LSP that ingress or egress in second network return.

Particularly; The ingress that first node can receive in second network is replied (Reservation through notice (notify) message or path; Hereinafter to be referred as the Resv) link attribute information of the FA-LSP of message bearing, from notify message or Resv message, parse the link attribute information of FA-LSP, perhaps; The egress that receives in second network passes through the link attribute information of the FA-LSP of notify message bearing, and parses the link attribute information of FA-LSP in the notify message.

For two-way FA-LSP, the end-node in the first network also egress in second network is sent the request of obtaining of the link attribute information be used to obtain FA-LSP, and receives the link attribute information of the FA-LSP that ingress or egress in second network return.Particularly; End-node in first network can be sent the request of obtaining through the egress of Resv message in second network; And receive ingress in second network through notify message, or the link attribute information of the FA-LSP that returns through notify message or Resv message of egress.In following examples of the present invention, the link attribute information that the request of obtaining that also will be used to obtain the link attribute information of FA-LSP is called FA-LSP obtains request.

As shown in Figure 2, be the flow chart of another embodiment of collocation method of link attribute information of the present invention, it may further comprise the steps:

Step 201, the ingress in second network receive the request of obtaining that the first node in first network sends, and this request of obtaining is used to obtain the link attribute information of FA-LSP, and first node in first network and end-node are through the FA-LSP adjacency.

Particularly, the ingress in second network can receive the Path message that the first node in first network sends, and the link attribute information that from this Path message, parses FA-LSP obtains request.

Step 202, ingress generate the link attribute information of FA-LSP, and send to the first node in first network according to second network of network topology information and the FA-LSP, make first node and end-node in first network carry out adjacency through FA-LSP.

Particularly, ingress can be according to second network of network topology information and the FA-LSP, generates notify message or Resv message, and the link attribute information of FA-LSP is carried on this notify message or Resv message sends to first node.

Accordingly, for two-way FA-LSP, the link attribute information that the egress in second network also receives the FA-LSP of the end-node transmission in first network obtains request, and the end-node in first network is sent the link attribute information of FA-LSP.Particularly; The link attribute information of end-node through the FA-LSP of Resv message bearing that egress in second network can receive in first network obtains request; From Resv message, parse this and obtain request, and the link attribute information of the FA-LSP that generates is carried on notify message or Resv message sends to the end-node in first network.

As shown in Figure 3, be a kind of application scenarios networking structure sketch map of the embodiment of the invention, this embodiment comprises client side network 1 and serve side network 2.Wherein, client side network 1 can be used as first network of the embodiment of the invention, and serve side network 2 can be used as second network of the embodiment of the invention.Client side network 1 is made up of with client side the 3rd node 13 client side first node 11, client side Section Point 12.Serve side network 2 is made up of with serve side the 3rd node 23 serve side first node 21, serve side Section Point 22.All be provided with interface on each node, the interface on the client side first node 11 is K and A, and the interface on the client side Section Point 12 is B and N, and the interface on client side the 3rd node 13 is L and M; Interface on the serve side first node 21 is C, G and E; Interface on the serve side Section Point 22 is F, J and D, and the interface on serve side the 3rd node 23 is H and I.Can the interface between two nodes be coupled together through link.In one embodiment of the invention; In the client side network 1; Client side first node 11 and client side the 3rd node 13; And between client side Section Point 12 and client side the 3rd node 13, all there is direct link to link to each other the FA-LSP adjacency that provides through serve side network 2 between client side first node 11 and the client side Section Point 12.

Each network can move Routing Protocol, for example: the ospf of band traffic engineering (Open the Shortest Path First with TE, hereinafter to be referred as: OSPF-TE) agreement, come publisher node and link information.In this way, each node in the network can obtain the link information of all nodes in each automatic network.For example: client side first node 11 can be through link information of Routing Protocol issue to client side Section Point 12, and this end interface of link is K, and remote interface is L, and information such as total bandwidth, remaining bandwidth; Serve side first node 21 can be through link information of Routing Protocol issue to serve side Section Point 22, and this end interface of link is E, and remote interface is F, and length is n rice, and SRLG information is (1,2).

Client side first node 11 can be through continuous signaling pattern or nested/splicing signaling mode foundation with the FA-LSP between the client side Section Point 12.FA-LSP can be calculated by the serve side ingress in the path of serve side; For example: calculate by serve side first node 21; Also can calculate, suppose that the serve side path that calculates is serve side first node 21 → serve side the 3rd node 23 → serve side Section Point 22 by path computation service device centralized in the serve side ingress request network.If adopt the continuous signaling pattern, then only there is a LSP between client side first node 11 and the client side Section Point 12, promptly above-mentioned FA-LSP, the path is A → C → G → H → I → J → D → B.If adopt nested/splicing signaling mode, the tunnel that then can set up serve side first node 21 → serve side Section Point 22 earlier carries FA-LSP, after completion is set up in the tunnel, continues to set up FA-LSP again.At this moment, have two LSP between client side first node 11 and the client side Section Point 12: one is FA-LSP, and the path is A → C → tunnel → D → B, and another is the tunnel LSP that belongs to serve side network 2 fully, and the path is G → H → I → J.Ingress in the serve side network obtains after the path of serve side, just just can set up being connected between client side first node 11 and the client side Section Point 12 according to this path.

Respectively with client side first node 11 and client side Section Point 12 as first, end-node, with serve side first node 21 and serve side Section Point 22 as go into, egress.Suppose that FA-LSP is serve side first node 21 (G) → serve side the 3rd node 23 (H) → serve side the 3rd node 23 (I) → serve side Section Point 22 (J) in the path of serve side.To set up two-way FA-LSP through the continuous signaling pattern is example, and the flow chart of an application implementation example of the collocation method of link attribute information of the present invention is as shown in Figure 4, and it may further comprise the steps:

Step 301; Client side first node 11 sends Path message to serve side first node 21; Request is established to the connection of client side Section Point 12, this Path message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.

Particularly; RSVP (Resource Reservation Protocol with TE that can the expansion bands traffic engineering; Hereinafter to be referred as the notice request RSVP-TE) (Notify Request) object, be used in reference to and be shown in indication in the signaling message (for example: Path message, Resv message, Notify message) and return link attribute informations such as the time delay of FA-LSP, SRLG.Can be respectively at Internet protocol (Internet Protocol; Hereinafter to be referred as: IP) the 4th edition (hereinafter to be referred as: IPv4) with sixth version (hereinafter to be referred as: increase an attribute field in Notify Request object IPv6); SRLG information is returned in S flag bit setting through in the attribute field, through the T flag bit in the attribute field return time delay information is set, in addition; Can also be provided with other flag bit in the attribute field, be used to return other link attribute information.Further, can also in attribute field, be provided for carrying out the F flag bit of fault notification.Can be provided with in advance, be 1 o'clock at flag bit, need return the node that relevant parameter information is given the address field appointment in the Notify Request object.

With shown in the table 2, be respectively a concrete form instance of the Notify Request object after the expansion among the IPv4 like following table 1.

The form of table 1 IPv4Notify Request object

The form of table 2 IPv6Notify Request object

Step 302; After serve side first node 21 receives Path message; The link attribute information that from Path message, parses FA-LSP obtains request, the serve side path of calculating according to serve side first node 21 or path computation service device fill in route display object (Explicit Route Object, hereinafter to be referred as: ERO): { serve side first node 21; Serve side the 3rd node 23; Serve side Section Point 22}, and the filling records routing object (Record Route Object, hereinafter to be referred as: RRO); The link index of serve side first node 21 (G) is write RRO, this ERO and RRO are write send to serve side the 3rd node 23 in the Path message then.Path message will transmit to downstream node along the route of appointment until outlet client side Section Point 22.In this step, serve side first node 21 can remove Notify Request object.

Step 303 after serve side the 3rd node 23 receives Path message, connects according to ERO, and the link index of serve side the 3rd node 23 (I) is write RRO, then treated Path message is sent to serve side Section Point 22.

Step 304; After serve side Section Point 22 receives Path message, from RRO, obtain the routing information of the FA-LSP of record, also promptly: FA-LSP; The process of the routing information of the FA-LSP of record also promptly generates the process of FA-LSP; Because the routing information in the heterogeneous networks needs to maintain secrecy each other, from Path message, remove the serve side routing information among the RRO, then Path message is sent to client side Section Point 12.

Step 305 after client side Section Point 12 receives Path message, is returned Resv message to serve side Section Point 22, this Resv message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.

Step 306, serve side Section Point 22 is filled in RRO after receiving Resv message, and this RRO write sends to serve side the 3rd node 23 in the Resv message; In addition,, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client side Section Point 12 in the Notify message according to the FA-LSP of record and the network topological information of serve side network 2 of storage in advance.Client side Section Point 12 can be stored this link attribute information, uses in order to follow-up selection LSP.Serve side first node 21 can remove Notify Request object in this step.

Particularly; Can increase a forwarding adjacency parameter (Forwarding Adjacency Parameter; Hereinafter to be referred as: object FA Parameter) is used for indication and passes through link attribute informations such as the time delay of signaling message (for example: Path message, Resv message, Notify message) carrying FA-LSP, SRLG.With shown in the table 4, be respectively a concrete form instance of time delay FA Parameter object and SRLGFA Parameter object like following table 3.

The form of table 3 time delay FA Parameter object

The form of table 4 SRLG FA Parameter object

Step 307 after serve side the 3rd node 23 receives Resv message, is filled in RRO, and this RRO write sends to serve side first node 21 in the Resv message.

Step 308 after serve side first node 21 receives Resv message, because the routing information in the heterogeneous networks needs to maintain secrecy each other, is removed the serve side routing information among the RRO from Resv message, then Resv message is sent to client side first node 11; In addition; Serve side first node 21 is also according to the network topological information of the FA-LSP of record with the serve side network of storing in advance 2; Generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client side first node 11 in the Notify message.Client side first node 11 can parse this link attribute information and storage from Notify message, use in order to follow-up selection LSP.

In addition; Serve side first node 21 also can be with according to the FA-LSP of record and the network topological information of serve side network 2 of storage in advance; Generate the link attribute information such as time delay, SRLG of FA-LSP and be carried in the Resv message of removing behind the RRO; Through Resv message link attribute informations such as the time delay of FA-LSP, SRLG are sent to client side first node 11; From Resv message, parse the link attribute informations such as time delay, SRLG of FA-LSP by client side first node 11, and waiting link attribute information and sending to client side first node 11 through Notify message bearing FA-LSP separately not.

In step 306 and the step 308; Serve side first node 21 and serve side Section Point 22 can adopt following method specifically to generate the link attribute informations such as time delay, SRLG of FA-LSP: if each node comprises the length or the link attribute informations such as time delay, SRLG of respective link in the serve side network 2 in the link information of issue; The link attribute information that comprises in the link information that then network topological information of serve side first node 21 and serve side Section Point 22 serve side networks 2 and each node are issued comes the link attribute informations such as time delay, SRLG of calculation services side path; If each node does not comprise the link attribute information of respective link in the serve side network 2 when the issue link information; Then serve side first node 21 can use signaling to collect the link attribute information of every link in the serve side path with serve side Section Point 22; For example: when using RRO record serve side node interface information; To also be recorded among the RRO with length or the link attribute informations such as time delay, SRLG of this interface, so just can obtain the link attribute information such as time delay, SRLG in serve side whole piece path as the index respective links.

If serve side network 2 breaks down; For example: the link between serve side the 3rd node 23 and the serve side Section Point 22 has broken, and then serve side the 3rd node 23 or serve side Section Point 22 can use first node client side first node 11 these FA-LSP faults of signaling FA-LSP.Client side first node 11 is initiated signaling procedures to serve side first node 21 again, that is: execution in step 301, and this FA-LSP of heavy-route can use the resource of original FA-LSP as far as possible in the process of heavy-route.Serve side first node 21 recomputates the serve side path after receiving this Path message, according to this FA-LSP of serve side new route heavy-route that recalculates, and uses RRO object record new route information.After heavy-route is accomplished, utilize the Notify message informing again as the client side first node 11 of FA-LSP two end nodes and the link attribute information of client side Section Point 12 these new FA-LSP.After client side first node 11 receives the link attribute information of this new FA-LSP with client side Section Point 12, can delete the link attribute information of the FA-LSP that link failure occurs.

In the embodiment shown in fig. 4; Serve side first node 21 by as serve side network 2 ingress is notified the link attribute information as client side first node 11 these FA-LSP of the first node of FA-LSP, by the link attribute information of notifying as client side Section Point 12 these FA-LSP of FA-LSP end-node as the serve side Section Point 22 of serve side network 2 egress.In addition; Also can be by other the arbitrary node in the serve side network 2; For example: serve side first node 21; The address that obtains client side first node 11 in the NotifyRequest object from the Path message that receives, the address that obtains client side Section Point 12 in the NotifyRequest object from the Resv message of receiving is by head, the link attribute information of this FA-LSP of end-node or the new link attribute information of this other arbitrary node notice FA-LSP.Perhaps; By other the arbitrary node in the network 2; For example: serve side Section Point 22; The address that obtains client side first node 11 in the Notify Request object from the Path message that receives, the address that obtains client side Section Point 12 in the Notify Request object from the Resv message of receiving is by head, the link attribute information of this FA-LSP of end-node or the new link attribute information of this other arbitrary node notice FA-LSP.

Setting up two-way FA-LSP with nested/splicing signaling mode is example, and the flow chart of the Another application embodiment of the collocation method of link attribute information of the present invention is as shown in Figure 5, and it may further comprise the steps:

Step 401; Client side first node 11 sends Path message to serve side first node 21; Request is established to the connection of client side Section Point 12, this Path message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.

Step 402; After serve side first node 21 received Path message, the link attribute information that from Path message, parses FA-LSP obtained request, filled in ERO:{ serve side first node 21 according to the serve side path that serve side first node 21 or path computation service device calculate; Serve side the 3rd node 23; Serve side Section Point 22}, and use RRO record tunnel path information writes RRO with the link index of serve side first node 21 (G); Then this ERO and RRO are write and send to serve side the 3rd node 23 in the Path message, the serve side tunnel is set up in request.Path message will transmit to downstream node along the route of appointment until outlet client side Section Point 22.

Step 403 after serve side the 3rd node 23 receives Path message, connects according to ERO, and the link index of serve side the 3rd node 23 (I) is write RRO, then treated Path message is sent to serve side Section Point 22.

Step 404 after serve side Section Point 22 receives Path message, writes RRO with the link index of serve side Section Point 22 (J), returns to serve side the 3rd node 23 after RRO is write Resv message.

Step 405 after serve side the 3rd node 23 receives Resv message, is used RRO record tunnel path information, sends to serve side first node 21 in the Resv message then.

Step 406; After serve side first node 21 receives Resv message; Set up the tunnel of serve side first node 21 according to the tunnel path information of record; Send Path message to serve side Section Point 22, service example first node 21 → serve side Section Point 22 tunnels of consulting service recorder with serve side Section Point 22 carry FA-LSP.

Step 407 after serve side Section Point 22 receives Path message, is transmitted Path message to client side Section Point 12, and sets up the FA-LSP of client side first node 11 to client side Section Point 12.

Step 408 after client side Section Point 12 receives Path message, is returned Resv message to serve side Section Point 22, this Resv message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.

Step 409; After serve side Section Point 22 receives Resv message; The link attribute information that from Resv message, parses FA-LSP obtains request; According to the routing information in tunnel and the network topological information of serve side network 2, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client side Section Point 12 in the Notify message.Client side Section Point 12 can be stored this link attribute information, uses in order to follow-up selection LSP; In addition, serve side Section Point 22 sends Resv message to serve side the 3rd node 23, consults to use serve side Section Point 22 → serve side first node 21 tunnels to carry FA-LSP with serve side first node 21.

Step 410 after serve side first node 21 receives Resv message, is given client side first node 11 with this Resv forwards; In addition; Serve side first node 21 is also according to the routing information in tunnel and the network topological information of serve side network 2; Generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client side first node 11 in the Notify message.Client side first node 11 can parse link attribute information and the storage of FA-LSP from Notify message, use in order to follow-up selection LSP.

With embodiment illustrated in fig. 4 similar, serve side first node 21 also can be carried on the link attribute information of FA-LSP Resv message and send to client side first node 11, and does not pass through the link attribute information that waits of Notify message bearing FA-LSP separately.

If serve side network 2 breaks down, the link between serve side the 3rd node 23 and the serve side Section Point 22 has broken, and then serve side the 3rd node 23 or serve side Section Point 22 can use signaling serve side first node 21 these fault messages.Serve side first node 21 can be initiated signaling procedure, that is: execution in step 402, and the tunnel is re-routed to serve side first node 21 (E) → serve side Section Point 22 (F).After heavy-route is accomplished; Serve side first node 21 or serve side Section Point 22 can be searched the relevant FA-LSP that uses this tunnel, and use the Notify message informing as the client side first node 11 of FA-LSP two end nodes and the link attribute information of client side Section Point 12 these new FA-LSP.After client side first node 11 receives the link attribute information of this new FA-LSP with client side Section Point 12, can delete the link attribute information of the FA-LSP that link failure occurs.

Similar with embodiment shown in Figure 4, also can be: serve side first node 21, head, the link attribute information of this FA-LSP of end-node or the new link attribute information of notice FA-LSP by other the arbitrary node in the serve side network 2, for example; Perhaps, by other the arbitrary node in the serve side network 2, for example: serve side Section Point 22, head, the link attribute information of this FA-LSP of end-node or the new link attribute information of notice FA-LSP.

Above-mentioned two head in the client side network 1, end-node can be through a plurality of serve side network 2 adjacency, and client side is first, the FA-LSP between the end-node is spliced by a plurality of serve side tunnel, and the foundation in each serve side tunnel can be with reference to embodiment shown in Figure 5.As shown in Figure 6, be the another kind of application scenarios networking structure sketch map of the embodiment of the invention, this embodiment is an example with two serve side networks, its method is equally applicable to comprise the multilayer/multiple-domain network of any a plurality of serve side networks.FA-LSP between client side first node 11 and the client side Section Point 12 is through two serve side networks; The first serve side network 2 provides being connected between serve side first node 21 and the serve side Section Point 22, and the second serve side network 2 provides being connected between serve side the 4th node 24 and serve side the 5th node 25.Interface on serve side the 4th node 24 is O, S and P; Interface on serve side the 5th node 25 is Q, T and R, and the interface on serve side the 6th node 26 is U and V.Usually, two serve side networks are not known the other side's network topological information each other.Therefore, have only node in the respective service side network just can obtain the link attribute information such as time delay, SRLG of link in this serve side network.Be the link attribute information that serve side first node 21 can obtain link between serve side first node 21 and the serve side Section Point 22, serve side the 4th node 24 can obtain the link attribute information of link between serve side the 4th node 24 and serve side the 5th node 25.The link attribute information both sides of link know between serve side Section Point 22 and serve side the 4th node 24; Can be according to being provided with in advance; Calculate by serve side Section Point 22 or serve side the 4th node 24; Concrete, can be provided with in advance by the bigger node of boundary node sign (ID) and calculate, or calculate by the ingress of network.

In multilayer/multiple-domain network; First node in the client side network can obtain request to the link attribute information that the ingress in one of them serve side network sends FA-LSP, and receives the link attribute information of the FA-LSP that returns along the ingress in first serve side network of FA-LSP direction or the egress in last serve side network; Perhaps; First node receives the link attribute information in path in each serve side network of the formation FA-LSP that ingress or egress in each serve side network of FA-LSP process return respectively, and obtains the link attribute information of whole FA-LSP according to the link attribute information in path in each serve side network.

In networking structure shown in Figure 6; Can obtain the link attribute information of this FA-LSP respectively through dual mode as the client side first node 11 of the first end-node of FA-LSP and client side Section Point 12: first kind of mode is to be sent the link attribute information of whole piece FA-LSP to client side first node 11 or client side Section Point 12 by the node in one of them serve side network 2; The second way is; Send the link attribute information of different route segments by one of them in client side first node 11 and client side Section Point 12 of the node in the different serve side networks 2, obtain the link attribute information of whole piece FA-LSP by client side first node 11 or client side Section Point 12 according to the link attribute information of each route segment.

According to first kind of mode; Serve side first node 21 is asked the Path message of splicing each bar tunnel of serve side, setting up FA-LSP in being used for of sending to downstream node; Address field in the Notify Request object is revised as serve side first node 21, and other node transparent transmission Notify Request object in Path message.Like this; In setting up the process of FA-LSP; Ingress serve side the 4th node 24 in the second serve side network 2 can be according to the address of appointment in the Notify Request object in the Path message, the link attribute information in path in the serve side network 2 is carried on Notify message sends to serve side first node 21.Like this, serve side first node 21 just can have been collected the link attribute information of whole piece FA-LSP.Serve side first node 21 can be carried on the link attribute information of whole piece FA-LSP Notify message and send to client side first node 11.Similarly; Serve side the 5th node 25 can be asked the Resv message of splicing each bar tunnel of serve side, setting up FA-LSP in being used for of upstream sending; Address field in the Notify Request object is revised as serve side the 5th node 25, and other node transparent transmission Notify Request object in Resv message.Like this; In setting up the process of FA-LSP; Ingress serve side first node 21 in the first serve side network 2; Can with the link attribute information in path in the first serve side network 2, be carried on Notify message and send to serve side the 5th node 25 according to the address of appointment in the Notify Request object in the Resv message.Like this, serve side the 5th node 25 just can have been collected the link attribute information of whole piece FA-LSP.Serve side the 5th node 25 can be carried on the link attribute information of whole piece FA-LSP Notify message and send to client side Section Point 12.

According to the second way; Serve side first node 21 is asked the Path message of splicing each bar tunnel of serve side, setting up FA-LSP in being used for of sending to downstream node; Do not revise the address field in the Notify Request object, promptly remain client side first node 11.Then the ingress of each serve side network 2 is a serve side first node 21 and serve side the 4th node 24 can be respectively sends to client side first node 11 with the link attribute information in each section path.The link attribute information in 11 pairs of each section paths of client side first node carries out handled just can obtain the link attribute information such as time delay, SRLG of whole piece FA-LSP.Similarly, serve side the 5th node 25 is asked the Resv message of splicing each bar tunnel of serve side, setting up FA-LSP in being used for of upstream sending, and does not revise the address field in the Notify Request object, promptly remains client side Section Point 12.Then the ingress of each serve side network 2 is a serve side first node 21 and serve side the 4th node 24 can send to client side Section Point 12 with link attribute informations such as the time delay in each section path, SRLG.The link attribute information in 12 pairs of each section paths of client side Section Point carries out handled just can obtain the link attribute information such as time delay, SRLG of whole piece FA-LSP.

After certain section tunnel heavy-route; The ingress of each serve side network 2 be serve side first node 21 with serve side the 4th node 24 can be with the interdependent node of link attribute informations such as the time delay in new tunnel after the heavy-route, SRLG through Notify message informing FA-LSP; That is: set up in the signaling message of FA-LSP the indicated node of address field that carries in the Notify Request object.If the indicated node of address field that carries in the Notify Request object is a serve side first node 21; Suppose the tunnel generation heavy-route between serve side the 4th node 24 and serve side the 5th node 25; Then serve side the 4th node 24 can be with link attribute informations such as the time delay in the new tunnel after the heavy-route, SRLG; And the information of using the FA-LSP in this new tunnel sends to serve side first node 21; Serve side first node 21 upgrades link failure information such as the time delay, SRLG of FA-LSP in view of the above, and the first node that sends to FA-LSP is a client side first node 11.If the indicated node of address field that carries in the Notify Request object is a client side first node 11; Suppose the tunnel generation heavy-route between serve side the 4th node 24 and serve side the 5th node 25; Then serve side the 4th node 24 can be with link attribute informations such as the new tunnel time delay after the heavy-route, SRLG; And the information of using the FA-LSP in this tunnel sends to client side first node 11, and client side first node 11 upgrades link failure information such as the time delay, SRLG of FA-LSP in view of the above.

Client side first node 11 and client side Section Point 12 obtain in the aforesaid way of link attribute information of this FA-LSP; It all is the link information such as time delay, SRLG that utilizes every section tunnel path of Notify message informing respective nodes by the ingress in the different serve side networks 2; In addition; Also can be provided with in advance; By other node in the serve side network 2, for example: the egress of different serve side networks 2, utilize the link attribute information such as time delay, SRLG of every section tunnel path of Notify message informing respective nodes; In addition; Can also only need to guarantee that each serve side network 2 have only a node to be responsible for notifying link attribute informations such as the time delay of every section tunnel path of respective nodes, SRLG just passable by the first node of the ingress in the different serve side networks 2 notice FA-LSP, the link attribute information of end-node FA-LSP of egress notice FA-LSP in the different serve side network 2.

Owing to when serve side first node 21 calculation services side paths, can obtain complete serve side routing information; Therefore; In above-mentioned each embodiment of the present invention; Serve side first node 21 also can not use the routing information of RRO record serve side, and directly utilizes the serve side routing information that calculates to obtain the link attribute informations such as time delay, SRLG of FA-LSP.

A kind of communication equipment that the embodiment of the invention provides is positioned at first network, and it comprises receiver module; Be used for receiving the node of second network; For example: ingress or egress, the link attribute information of the FA-LSP of transmission is according to this link attribute information; This communication equipment is set up in abutting connection with switching path through this FA-LSP with another communication equipment as end-node in first network as first node.

As shown in Figure 7, be the structural representation of communication equipment embodiment one of the present invention, the communication equipment of this embodiment comprises sending module and receiver module.Wherein, sending module is used for the basis link information of storage in advance, and the link attribute information that the node in second network sends FA-LSP obtains request, and this communication equipment passes through the FA-LSP adjacency as the end-node in the first node and first network; Receiver module is used for receiving the link attribute information of the FA-LSP that the node of second network returns.

Referring to Fig. 7, above-mentioned communication equipment can also comprise first memory module again, is used to store the link attribute information of link information and FA-LSP; Sending module is according to the link information of storing in first memory module, and the link attribute information that the ingress in second network sends FA-LSP obtains request; Receiver module receives the link attribute information of the FA-LSP that the node in second network returns, and the link attribute information of FA-LSP is stored in first memory module.

In the communication equipment embodiment illustrated in fig. 7, sending module can comprise generation unit and transmitting element.Wherein, generation unit is used to generate the link attribute information that carries FA-LSP and obtains the Path message of request; Transmitting element is used for the link information stored according to first memory module, and the node in second network sends the bearing link attribute information and obtains the Path message of request.As shown in Figure 8, be the structural representation of communication equipment embodiment two of the present invention.

A progressive step ground, in the communication equipment embodiment illustrated in fig. 7, receiver module can comprise receiving element, acquiring unit and storage performance element.Wherein, receiving element is used for receiving Notify message that comprises link attribute information or the Resv message that the node of second network sends; Acquiring unit is used for obtaining link attribute information from Notify message or Resv message; The storage performance element is used for the link attribute information that acquiring unit obtains is stored in first memory module, and is as shown in Figure 8.

Fig. 7 and communication equipment embodiment illustrated in fig. 8 can be used as the first node in first network, realize like the collocation method embodiment of the above-mentioned link attribute information of the present invention and the corresponding function shown in the application implementation example thereof, like the function of client side first node 11.In addition, the end-node of this communication equipment in also can first network realizes the corresponding function like end-node in the collocation method embodiment of the above-mentioned link attribute information of the present invention or its application implementation example, like the function of client side Section Point 12.

The communication equipment that another embodiment of the present invention provides is positioned at second network, and it comprises:

Information generating module is used for generating the link attribute information of transmitting FA-LSP according to transmitting FA-LSP and the second network of network topology information of storing in advance, and first node in first network and end-node are transmitted the FA-LSP adjacency through this;

Information sending module is used for making first node and end-node in first network pass through this FA-LSP adjacency to the first node of first network and/or the link attribute information of the end-node transmission forwarding FA-LSP that information generating module generated.

As shown in Figure 9, be the structural representation of communication equipment embodiment three of the present invention, the communication equipment of this embodiment comprises information receiving module, information generating module and information sending module.Wherein, information receiving module is used for receiving the first node of first network or the link attribute information of the FA-LSP that end-node is sent obtains request; Information generating module is used for the second network of network topology information with the place of canned data generation module in advance according to FA-LSP, generates the link attribute information of FA-LSP, and the first node in first network and end-node are passed through the FA-LSP adjacency; Information sending module is used to send the link attribute information of the FA-LSP that information generating module generates.

Referring to Fig. 9, above-mentioned communication equipment can also comprise second memory module and/or routing information generation module again.Wherein, second memory module is used to store the second network of network topology information; The routing information generation module is used to generate FA-LSP; The FA-LSP that information generating module generates according to the routing information generation module with the second network of network topology information of storing in second memory module, generates the link attribute information of FA-LSP.

In addition, in the communication equipment embodiment illustrated in fig. 9, information receiving module can comprise information receiving unit and information acquisition unit.Wherein, information receiving unit is used to receive Path message, this Path message bearing the link attribute information of FA-LSP obtain request; The link attribute information that information acquisition unit is used for parsing from Path message FA-LSP obtains request, and Path message is sent to the routing information generation module; The routing information generation module generates FA-LSP according to Path message.Shown in figure 10, be the structural representation of communication equipment embodiment four of the present invention.

Further, in the communication equipment embodiment illustrated in fig. 9, information sending module can comprise information generating unit and information transmitting unit.Wherein, information generating unit is used to generate Notify message or Resv message, Notify message or Resv message bearing the link attribute information of the FA-LSP that generates by information generating module; Information transmitting unit is used to send the Notify message or the Resv message of the link attribute information that has carried FA-LSP, and is shown in figure 10.

Fig. 9 and communication equipment embodiment illustrated in fig. 10 can be used as the ingress in second network, realize like the collocation method embodiment of the above-mentioned link attribute information of the present invention or the corresponding function shown in its application implementation example, like the function of serve side first node 21.In addition, this communication equipment also can be used as the egress in second network, realizes the corresponding function like egress in the collocation method embodiment of the above-mentioned link attribute information of the present invention or its application implementation example, like the function of serve side Section Point 22.

A kind of communication system that the embodiment of the invention provides comprises first communication equipment that is arranged in first network and the second communication equipment that is arranged in second network.Second communication equipment generates the link attribute information of FA-LSP according to this second network of network topology information and FA-LSP; Second communication equipment sends to first communication equipment or third communication equipment with the link attribute information of FA-LSP; According to said link attribute information, first communication apparatus and third communication equipment are through the FA-LSP adjacency.

Wherein, First communication equipment can be used as first node or the end-node in first network; That is: client side first node 11 or client side Section Point 12; Adopt communication equipment like Fig. 7 or arbitrary embodiment shown in Figure 8, in the collocation method embodiment of corresponding realization such as the above-mentioned link attribute information of the present invention or its application implementation example, the corresponding function of first node or end-node.Second communication equipment can be used as ingress or the egress in second network; That is: serve side first node 21 or serve side Section Point 22; Adopt communication equipment like Fig. 9 or arbitrary embodiment shown in Figure 10; In the collocation method embodiment of corresponding realization such as the above-mentioned link attribute information of the present invention or its application implementation example, the corresponding function of ingress or egress.

Particularly, the information sending module in receiver module in first communication equipment and the second communication equipment is carried out information interaction, receives the link attribute information of the FA-LSP of information sending module transmission.

In addition, the sending module in first communication equipment also with second communication equipment in information receiving module carry out information interaction, send the request of obtaining to information receiving module, this request of obtaining is used to obtain the link attribute information of FA-LSP.

Based on the invention described above embodiment; Node in second network is after FA-LSP sets up completion; Can generate the link attribute information of FA-LSP, and initiatively send to first node or the Section Point in first network according to this second network of network topology information and FA-LSP information; Do not need artificial from second network inquiry link attribute information and being configured on the node in first network; Realize the automatic configuration of link attribute information, thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.

It should be noted last that: above embodiment is only in order to explaining technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is specified with reference to above-mentioned preferred embodiment; Those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to spirit and the scope that replacement does not break away from technical scheme of the present invention.

Claims

1. the collocation method of a link attribute information is characterized in that, comprising:

2. method according to claim 1; It is characterized in that; Node in said second network generates before the link attribute information of said forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path, also comprises:

Node in said second network receives the path request message that the first node in first network sends, and from said path request message, parses the request of obtaining, and this request of obtaining is used to obtain the link attribute information of said forwarding adjacency label switched path; Or

Node in said second network receives the path answer message that the Section Point in first network sends; And from said path answer message, parsing the said request of obtaining, this request of obtaining is used to obtain the link attribute information of said forwarding adjacency label switched path.

3. method according to claim 1; It is characterized in that; Generate the link attribute information of said forwarding adjacency label switched path and the node in said second network said link attribute information is sent between the first node and/or Section Point in first network, also comprise: the link attribute information of said forwarding adjacency label switched path is carried in notification message or the path answer message;

Node in said second network comprises first node and/or the Section Point that said link attribute information sends in first network: notification message or the path answer message that will carry said link attribute information send to first node and/or Section Point in said first network; First node in said first network and/or Section Point parse said link attribute information from notification message or path answer message.

4. according to any described method of claim 1 to 3, it is characterized in that, also comprise:

When the forwarding adjacency label switched path in said second network breaks down, the first node of the node in said second network in first network and/or the link attribute information of the new forwarding adjacency label switched path after the Section Point transmission heavy-route.

5. method according to claim 2 is characterized in that, said second network is a plurality of;

The path request message that node in said second network receives the first node transmission in said first network is specially: receive the path request message that the first node in said first network sends along the ingress in first second network of said forwarding adjacency label switched path direction; And/or the path answer message that the node in said second network receives the Section Point transmission in first network is specially: receive the path answer message that the Section Point in said first network sends along the egress in last second network of said forwarding adjacency label switched path direction.

6. method according to claim 5 is characterized in that, the node in said second network comprises first node and/or the Section Point that said link attribute information sends in first network:

Ingress in said first second network or the egress in last second network send to first node and/or Section Point in first network with said link attribute information;

Perhaps; Said node in second network of label switched path process, will belong to separately respectively, constitute said in each second network of label switched path the link attribute information in path send to first node and/or Section Point in first network;

First node in first network and/or Section Point obtain said link attribute information in abutting connection with label switched path according to the link attribute information in path in each second network.

7. according to any described method of claim 1 to 3, it is characterized in that said link attribute information is the time delay and/or the shared risk link group information of link.

8. a communication equipment is positioned at first network, it is characterized in that, comprising:

Receiver module is used for receiving the link attribute information of the forwarding adjacency label switched path that the node of second network sends, and according to said link attribute information, another communication equipment foundation in said communication equipment and said first network is in abutting connection with switching path; Sending module is used for the basis link information of storage in advance, and the node in said second network sends the path request message or the path of carrying the request of obtaining and replys message, the said link attribute information of asking to be used to obtain the forwarding adjacency label switched path that obtains.

9. communication equipment according to claim 8 is characterized in that, also comprises:

First memory module is used to store the link attribute information of link information and forwarding adjacency label switched path;

Said sending module is according to the link information of storing in said first memory module, and the node in said second network sends the path request message or the path of carrying the request of obtaining and replys message;

Said receiver module receives the link attribute information of the said forwarding adjacency label switched path that the node in said second network returns, and the link attribute information of said forwarding adjacency label switched path is stored in said first memory module.

10. a communication equipment is positioned at second network, it is characterized in that, comprising:

Information sending module; Be used for sending the link attribute information of the forwarding adjacency label switched path that said information generating module generates, make first node and Section Point in said first network carry out adjacency through said forwarding adjacency label switched path to the first node of first network and/or Section Point.

11. communication equipment according to claim 10 is characterized in that, also comprises:

Information receiving module; Be used for receiving the first node of said first network or the path request message or the path answer message of Section Point transmission; And from said path request message or path answer message, parsing the request of obtaining, this request of obtaining is used to obtain the link attribute information of said forwarding adjacency label switched path.

12. communication equipment according to claim 11 is characterized in that, also comprises:

Second memory module is used to store the said second network of network topology information; With

The routing information generation module is used to generate the forwarding adjacency label switched path;

The said forwarding adjacency label switched path that said information generating module generates according to said routing information generation module; With the said second network of network topology information of storing in said second memory module, generate the link attribute information of said forwarding adjacency label switched path.

13. communication equipment according to claim 12 is characterized in that, said information receiving module comprises:

Information receiving unit is used for the RX path request message;

Information acquisition unit is used for parsing the said request of obtaining from said path request message, and said path request message is sent to said routing information generation module;

Said routing information generation module generates said forwarding adjacency label switched path according to said path request message.

14., it is characterized in that said information sending module comprises according to any described communication equipment of claim 10 to 13:

Information generating unit; Be used to generate notification message or path and reply message; And the link attribute information of said forwarding adjacency label switched path is carried on said notification message or the path is replied in the message, or the link attribute information of said forwarding adjacency label switched path is carried in the path request message that receives;

Information transmitting unit is used to send the notification message or the path of carrying said link attribute information and replys message or path request message.

15. a communication system is characterized in that, comprising: the second communication equipment in first communication equipment in first network and third communication equipment and second network;

Said second communication equipment comprises:

According to said link attribute information, said first communication equipment and said third communication equipment are through said forwarding adjacency label switched path adjacency;

Said first communication equipment comprises: