CN101686179B - Transmission method, nodes and point-to-point network of link status release information - Google Patents

Abstract

The invention discloses a transmission method, a node and a point-to-point network for issuing link state information, and relates to the communication field. The transmission method of the link state announcement information includes: identifying part of the control channels among the multiple normal working control channels between the first node and the second node as flooding control channels; when the first node and the second node When the link state between the two nodes changes, the flooding control channel is used to send link state announcement information. The embodiment of the present invention also provides a node and a point-to-point network corresponding to the transmission method of the link state release information. The embodiment of the present invention only selects part of the control channels to flood the link state to publish information among multiple normally working control channels, which greatly reduces the amount of flooding information and improves the routing recovery performance.

Description

Transmission method, node and peer-to-peer network of link state announcement information

technical field

The invention relates to the communication field, in particular to a method for transmitting link state publishing information, node equipment and a point-to-point network.

Background technique

ASON (Automatically Switched Optical Network) is an intelligent optical transmission network that uses standard protocols such as signaling, routing, and automatic discovery to realize automatic route calculation, automatic connection establishment, and automatic network resource discovery. The ASON structure can be divided into transmission plane, control plane and management plane according to functions. Among them, the control plane has automatic neighbor, automatic link and automatic topology discovery functions.

The control plane uses the OSPF-TE (Open Shortest Path First-Traffic Engineering) protocol to perform automatic TE (Traffic Engineering, traffic engineering) topology discovery. The basic principle is OSPF (Open Shortest Path First, open Flooding (Shortest Path First Traffic Engineering) mechanism.

When a link somewhere in the network fails, the nodes at both ends of the link detect the failure, generate TE-LSA (Traffic Engineering-Link State Advertisement, Traffic Engineering Link State Advertisement), and start the flooding mechanism , to send TE-LSAs to all neighbor nodes. The flooding mechanism only requires the nodes that receive the flooding information to forward the information to their neighbor nodes except the node that sent the information through all the control channels that are currently in normal working state in broadcast mode.

In the course of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

When there are multiple control channels between two nodes connected in point-to-point mode, the flooding mechanism will send TE-LSA on each control channel between the two nodes. Since TE-LSA contains a large amount of data and is sent repeatedly on multiple control channels, it will occupy a large amount of communication bandwidth and affect the transmission of signaling packets; increase the workload of the internal processor of the node and affect the routing performance of the node , prolonging the network topology convergence time of OSPF.

Contents of the invention

Embodiments of the present invention provide a method, a node and a point-to-point network for transmitting link state announcement information that can reduce the amount of flooding information and improve route recovery performance.

In order to solve the above technical problems, the embodiments provided by the present invention are realized through the following technical solutions:

On the one hand, the embodiments of the present invention provide a method for transmitting link state announcement information.

A method for transmitting link state announcement information, comprising:

Part of the control channels among the multiple normal working control channels between the first node and the second node are identified as flooding control channels;

When the state of the link between the first node and the second node changes, use the flooding control channel to send link state announcement information.

On the one hand, the embodiments of the present invention further provide a node.

A node comprising:

The control channel selection module is used to identify part of the control channels among the multiple normal working control channels between the current node and the second node as flooding control channels;

The flooding module is configured to use the flooding control channel selected by the control channel selection module to send link state release information when the link state between the current node and the second node changes.

On the other hand, the embodiment of the present invention also provides a peer-to-peer network.

A point-to-point network, comprising a first node and a second node connected through multiple normal working control channels, the first node is used for:

Identify some of the control channels between the current node and the second node as flooding control channels;

When the state of the link between the local point and the second node changes, the flooding control channel is used to send link state announcement information.

In the embodiment of the present invention, when there are multiple normal working control channels between two nodes, only a part of the control channels are selected to flood the link state to publish information among the multiple normal working control channels, which greatly reduces the amount of flooding information , which improves the routing recovery performance.

Description of drawings

FIG. 1 is a flow chart of a method for transmitting link state announcement information provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a method for transmitting link state release information in Embodiment 1 of the present invention;

3 is a flow chart of a method for transmitting link state release information in Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a node provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a node provided by another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a peer-to-peer network provided by an embodiment of the present invention.

Detailed ways

In order to better understand the technical solutions provided by the embodiments of the present invention, firstly, the application scenarios of the embodiments of the present invention in the peer-to-peer network are introduced:

The point-to-point network includes a first node and a second node; the first node and the second node are neighbor nodes; multiple control channels and at least one service data transmission link are included between the first node and the second node.

Embodiments of the present invention provide a method for transmitting link state announcement information.

A method for transmitting link state announcement information, comprising:

As shown in FIG. 1 , 101. Identify some of the control channels between the first node and the second node as flooding control channels;

In this step, the first node identifies part of the normally working control channel between the first node and the second node as a flooding control channel, and specifically identifies a normally working control channel as a flooding control channel.

102. When the link state between the first node and the second node changes, use the flooding control channel to send link state announcement information.

The link status changes include link available bandwidth changes, link cost attribute changes, and link recovery from failure.

In the embodiment of the present invention, when there are multiple normal working control channels between two nodes, only a part of the control channels are selected to flood the link state to publish information among the multiple normal working control channels, which greatly reduces the amount of flooding information , which improves the routing recovery performance.

Embodiment 1 of the present invention will be described in detail below.

Embodiment 1 of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 of the present invention distinguishes each control channel by adding flooding status attribute identifiers to all the control channels that work normally between the first node and the second node, and setting the value of the flooding status attribute identifiers, thereby To achieve the purpose of selecting a control channel for flooding.

As shown in Figure 2, the transmission method of the link state release information provided by the embodiment of the present invention includes:

201. Add flood status attribute identifiers for multiple control channels that are normally working between the first node and the second node;

In this step, the first node may add a flood status attribute identifier for all normal working control channels between the first node and the second node;

202. Select some control channels as flooding control channels;

In this step, the first node sets the flood status attribute flag of one of the control channels between the first node and the second node to be enabled, and sets the other between the first node and the second node. The flooding status attribute of the normal working control channel is identified as disabled; the control channel whose flooding status attribute identification value is enabled is used as the flooding control channel.

When a normally working control channel is opened between the first node and the second node, the first node detects the newly opened control channel and adds a flood status attribute identifier to it;

The first node detects the flooding status attribute identification value of other normal working control channels between the second node; if the flooding status attribute identification value of the normal working control channel is enabled, the newly opened The flood status attribute identification value of the channel is set to disabled; if there is no flood status attribute identification value of a normally working control channel, the flood status attribute identification value of the newly opened control channel is set to enable.

203. When the link state between the first node and the second node changes, use the flooding control channel to send link state release information;

In this step, when the first node detects that the link state between the first node and the second node changes, the first node uses the flood state attribute identifier to send link state announcement information for the enabled flood control channel.

The link status changes include link available bandwidth changes, link cost attribute changes, and link recovery from failure.

204. It is detected that the flooding control channel fails;

In this step, when the normal working control channel between the first node and the second node fails, the first node detects the failure; after that, the first node detects the flood status attribute identification of the failed control channel value; if the flood status attribute identification value of the faulty control channel is disabled, the control channel will be deleted directly; if the flood status attribute identification value of the faulty control channel is enabled, it means that the faulty control channel is currently used For the universal control channel, step 205 will be executed.

205. Select some normal working control channels except the flooding control channel as a new flooding control channel, and continue to send the link state release packet;

In this step, the first node selects another control channel in a normal working state except the faulty flooding control channel, sets its flooding state attribute identification value to enable, and uses it as a new flooding control channel; and Transfer the unflooded link state announcement information to the new flooding control channel to continue sending.

206. Delete the faulty flooding control channel;

In this step, the first node deletes the failed flooding control channel.

In the second embodiment of the present invention, by adding a flooding identifier to one of the multiple control channels between the first node and the second node, one of the multiple control channels is selected as the flooding control channel to transmit link status release information Purpose.

As shown in Figure 3, the transmission method of the link state release information provided by the embodiment of the present invention includes:

301. Add flooding identifiers to some of the control channels between the first node and the second node in normal operation;

In this step, a flooding identifier is added to a normal working control channel between the first node and the second node;

When there is a newly opened normal working control channel between the first node and the second node, the first node detects other normal working control channels between the first node and the second node except the newly opened control channel; if there is already a normal working control channel If there is a flooding flag on the control channel, no flag will be added to the newly opened control channel; if there is no normal working control channel with a flooding flag, then the flag will be added to the newly opened control channel.

302. Select some control channels as flooding control channels;

In this step, the first node selects the control channel with the flooding identifier as the flooding control channel.

303. When the link state between the first node and the second node changes, use the flooding control channel to send link state release information;

In this step, when the first node detects that the link state between the first node and the second node changes, the first node uses the flooding control channel with the flooding identifier to send link state release information.

The link status changes include link available bandwidth changes, link cost attribute changes, and link recovery from failure.

304. Select a new flooding control channel;

In this step, after the first node uses the flooding control channel to transmit the link status announcement information, the flooding identifier of the flooding control channel is deleted; and other normal working control channels except the flooding control channel In the channel, select a normal working control channel randomly or in a preset order, add a flooding identifier to it, and use it as a new flooding control channel; when the link state changes, a new link needs to be transmitted. When publishing information on the channel state, the information is transmitted through a new flooding control channel; the above-mentioned process of deleting the flooding identifier of the currently used flooding control channel and selecting other normal working control channels to add the flooding identifier can be repeated. By using different control channels to transmit link status announcement information, the load of each control channel can be balanced to avoid failure of one control channel due to excessive utilization.

305. It is detected that the flooding control channel fails;

In this step, when the normal working control channel between the first node and the second node fails, the first node detects the failure; after that, the first node detects whether the failed control channel has a flooding flag; If the faulty control channel does not have a flooding identifier, the control channel is directly deleted; if the faulty control channel has a flooding identifier, it means that the faulty control channel is the currently used flooding control channel, and step 306 will be executed.

306. Delete the flooding identifier of the faulty flooding control channel;

In this step, the first node deletes the flooding identifier of the faulty flooding control channel.

307. Select some normal working control channels except the flooding control channel as a new flooding control channel, and continue to send the link status release packet;

In this step, the first node selects another normal working control channel except the faulty flooding control channel, adds a flooding identifier to it, and uses it as a new flooding control channel; The channel status release information is transferred to the new flooding control channel and continues to be sent.

308. Delete the faulty flooding control channel;

In this step, the first node deletes the failed flooding control channel.

In the embodiment of the present invention, when there are multiple normal working control channels between two nodes, only a part of the control channels are selected to flood the link state to publish information among the multiple normal working control channels, which greatly reduces the amount of flooding information , which improves the routing recovery performance.

Embodiments of the present invention also provide a node.

As shown in Figure 4, a node is connected to the second node through multiple normal working control channels, and the node includes:

The control channel selection module 401 is used to identify part of the control channels among the multiple normal working control channels between the current node and the second node as flooding control channels;

The flooding module 402 is configured to use the flooding control channel selected by the control channel selection module to send link status announcement information when the link status between the current node and the second node changes.

The control channel selection module 401 may specifically include:

An identification adding unit 403, configured to add flooding status attribute identifications to multiple control channels normally working between the current node and the second node;

The processing unit 404 is configured to set the flooding status attribute flag of some of the control channels that work normally to be enabled, and use the part of the control channels as flooding control channels.

In this embodiment, part of the control channels that identify multiple normal operations between the current node and the second node are flooding control channels, specifically identifying a control channel that normally operates between the current node and the second node The channel is a flood control channel.

The nodes provided in another embodiment of the present invention include:

As shown in Figure 5, the control channel selection module 501 is configured to add flooding identifiers to some of the control channels between the current node and the second node, and add flooding identifiers to the control channels with flooding identifiers. Part of the control channel is used as a flood control channel;

The flooding module 502 is configured to use the flooding control channel selected by the control channel selection module to send link status release information when the link status between the current node and the second node changes.

In this embodiment, part of the multiple control channels that identify the normal operation between the current node and the second node are flooding control channels. The control channel is a flood control channel.

As shown in FIG. 6, the embodiment of the present invention also provides a peer-to-peer network.

A point-to-point network, characterized in that it includes a first node 601 and a second node 602 connected through a plurality of normal working control channels, the first node 601 is used for:

Identify some of the control channels between the current node and the second node as flooding control channels;

When the state of the link between the local point and the second node changes, the flooding control channel is used to send link state announcement information.

In the embodiment of the present invention, when there are multiple normal working control channels between the two nodes, only some of the control channels are selected to flood the link state to publish information among the multiple normal working control channels, which greatly reduces the amount of flooding information , which improves the routing recovery performance.

In the point-to-point network of another embodiment of the present invention, the difference from the point-to-point network of the above-mentioned embodiment is that part of the control channels among the control channels that identify the node and the second node in normal operation are flooding control channels Can be specifically:

Identify one of the plurality of normally working control channels as a flooding control channel.

The first node in the peer-to-peer network in the embodiment of the present invention may be the node provided in the embodiment of the present invention described above.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (14)

1. the transmission method of a link status release information is characterized in that, comprising:

Between sign first node and the Section Point in the control channel of many normal operations part control channel be inundation control channel;

Link State when between first node and Section Point changes, and uses the described part control channel of carrying the inundation sign to send link status release information;

Delete the inundation sign of this part control channel;

Select another part control channel in the control channel of other normal operation outside this part control channel, for this another part control channel is added the inundation sign.

2. the transmission method of link status release information according to claim 1 is characterized in that, the part control channel in the control channel of many normal operations between described sign first node and the Section Point is that inundation control channel comprises:

For the part control channel in the control channel of many normal operations between first node and the Section Point is added inundation status attribute sign;

The inundation status attribute that this part control channel in described many control channels is set is designated enables, with this part control channel as inundation control channel.

3. the transmission method of link status release information according to claim 1 and 2 is characterized in that, the part control channel in the control channel of many normal operations between described sign first node and the Section Point is that inundation control channel also comprises:

For other control channel outside this part control channel in the control channel of many normal operations between described first node and the described Section Point is added inundation status attribute sign;

The inundation status attribute that described other control channel is set is designated forbidding.

4. the transmission method of link status release information according to claim 1 is characterized in that, the part control channel between described sign first node and the Section Point in the control channel of many normal operations is that inundation control channel comprises:

Be that the part control channel in the control channel of many normal operations between first node and the Section Point adds the inundation sign, will be with the described part control channel of inundation sign as inundation control channel.

5. the transmission method of link status release information according to claim 2, it is characterized in that the part control channel in the control channel of many normal operations between described first node and the Section Point is specially a control channel in the control channel of many normal operations between described first node and the Section Point.

6. the transmission method of link status release information according to claim 4, it is characterized in that the part control channel in the control channel of many normal operations between described first node and the Section Point is specially a control channel in the control channel of many normal operations between described first node and the Section Point.

7. the transmission method of link status release information according to claim 1 and 2 is characterized in that, the part control channel between described sign first node and the Section Point in the control channel of many normal operations is that inundation control channel also comprises:

When the control channel of the normal operation of newly opening is arranged, for the control channel of this normal operation of newly opening is added inundation status attribute sign;

Whether the inundation status attribute sign that detects the control channel of other normal operation except the control channel of this normal operation of newly opening between first node and the Section Point does not also arrange, and perhaps whether is set to forbidding;

If the inundation status attribute sign of the control channel of other normal operation except this newly opens the control channel of normal operation does not all also arrange or is set to forbidding, the inundation status attribute that this control channel of newly opening normal operation then is set is designated enables;

If there has been the inundation status attribute sign of a control channel to be set to enable in the control channel of other normal operation except the control channel of this normal operation of newly opening, the inundation status attribute that the control channel of this normal operation of newly opening then is set is designated forbidding.

8. according to claim 1 or the transmission method of 4 described link status release informations, it is characterized in that the part control channel between described sign first node and the Section Point in the control channel of many normal operations is that inundation control channel also comprises:

When the control channel of the normal operation of newly opening was arranged, whether the control channel that detects other normal operation except the control channel of this normal operation of newly opening between first node and the Section Point identified with inundation;

If the control channel of other normal operation except the control channel of this normal operation of newly opening all without the inundation sign, is then added the inundation sign for the control channel of this normal operation of newly opening;

If there has been a control channel to identify with inundation in the control channel of other normal operation except the control channel of this normal operation of newly opening, then do not add the inundation sign for the control channel of this normal operation of newly opening.

9. the transmission method of link status release information according to claim 1 is characterized in that, also comprises:

Detecting described inundation control channel breaks down;

Select the control channel of part normal operation in other control channel except described inundation control channel as new inundation control channel;

The inundation control channel that deletion is broken down.

10. node, the control channel by many normal operations links to each other with Section Point, and this node comprises:

Control channel is selected module, and the control channel part control channel that is used for many normal operations between this node of sign and the Section Point is inundation control channel;

The inundation module, the Link State that is used for when between first node and Section Point changes, and uses the described part control channel of carrying the inundation sign to send link status release information; Delete the inundation sign of this part control channel; Select another part control channel in the control channel of other normal operation outside this part control channel, for this another part control channel is added the inundation sign.

11. node according to claim 10 is characterized in that, described control channel selects module to comprise:

The sign adding device is used to the control channel of many normal operations between this node and the Section Point to add inundation status attribute sign;

Processing unit, the inundation status attribute of part control channel that is used for arranging the control channel of described many normal operations is designated enables, with this part control channel as inundation control channel.

12. node according to claim 10, it is characterized in that, described control channel selects module specifically to be used to the part control channel in the control channel of many normal operations between this node and the Section Point to add the inundation sign, will be with the described part control channel of inundation sign as inundation control channel.

13. a point to point network is characterized in that, comprises that described first node comprises by the control channel of many normal operations continuous first node and Section Point:

Control channel is selected module, and the control channel part control channel that is used for many normal operations between this node of sign and the Section Point is inundation control channel;

The inundation module, the Link State that is used for when between first node and Section Point changes, and uses the described part control channel of carrying the inundation sign to send link status release information; Delete the inundation sign of this part control channel; Select another part control channel in the control channel of other normal operation outside this part control channel, for this another part control channel is added the inundation sign.

14. point to point network according to claim 13 is characterized in that, between described this node of sign and the Section Point in the control channel of many normal operations part control channel be that inundation control channel is specially:

A control channel that identifies in the control channel of described many normal operations is inundation control channel.

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