WO2007019727A1

WO2007019727A1 - A complex control node in the automatic switched transport networks and the control method thereof

Info

Publication number: WO2007019727A1
Application number: PCT/CN2005/001265
Authority: WO
Inventors: Desheng Sun
Original assignee: Zte Corporation
Priority date: 2005-08-15
Filing date: 2005-08-15
Publication date: 2007-02-22
Also published as: CN101133601A; CN101133601B

Abstract

A complex control node in the automatic switched transport networks (ASTN) decomposes into a global control node and a local control node. The global control plane (GCP) in the global control node comprises the network call controller (NCC), the connection controller (CC), the routing controller (RC) and the link resource manager (LRM). GCP abstracts the inside of the boundary to the logic transport node according to the boundary of the local transport network and the link of the boundary works as the input-output link. The local control plane (LCP) in the local control node comprises the connection controller (CC), the routing controller (RC) and the link resource manager (LRM). The local transport plane (LTP) is composed by the local transport networks (LTN). According to the present invention, it can make the complex control node decompose into two logic control nodes to respectively perform the control of ASTN and LTN, and it has the terse and faithful advantages. It provides a connection control method of the above complex control node. It can perform the function of the connection establishment, the release and the failure process by the connection control to the complex control node.

Description

Complex control node in automatic exchange transmission network and its control method

The present invention relates to the field of transport networks, and more particularly to complex control nodes and their control methods in Automatic Switched Transport Networks (ASTN). Background technique

In a telecommunications network, a transport network provides a transport channel and a transport platform for the services carried by the entire network. The transmission network includes a data transmission network, an optical transmission network, etc., wherein a typical optical transmission network has a Wavelength-division multiplexing (WDM) transmission network, a Synchronous Digital Hierarchy (SDH) transmission network, or Synchronous optical network (SONET) transport networks, which have been widely used in the telecommunications field.

Automatically exchanged transport networks ASTN is a research hotspot in the field of transport networks in recent years.

ITU-TG.807 recommends the implementation requirements of ASTN, and proposes to complete the function of ASTN by setting a special control plane (CP), and complete the management plane (MP) and transport plane (Transport plane). , referred to as TP) interaction. Furthermore, the ITU-TG.8080 and G771X series recommendations provide the functional structure and implementation flow of ASTN for optical networks, namely Automatic Switched Optical Networks (ASON), including the automatic establishment of service calls and connections. , automatic recovery, automatic discovery and other functions.

For convenience of description, in the present specification, the definition control plane CP and the CP-controlled local transmission plane TP together constitute a control node. [ _0. Generally, a control node contains a CP physical entity (not included as a backup or protection). Other CP entities) and one physical transfer node TP, as shown in Figure 1, are referred to hereinafter as standard control nodes. Currently, such standard control nodes have been applied in the ASTN network, as shown by the rectangular dashed box in Figure 2. But a control node may contain more than one transit node, and Is a transport network, such a control node is called a complex control node, that is, a complex control node includes a control plane physical entity and a plurality of physical transfer nodes, and a plurality of physical transfer nodes constitute a local transport network, as shown in FIG. The local transport network consists of five transport nodes N1-N5. The portion shown by the irregular dashed box in Figure 2 is the case for such a control node in the ASTN network. Compared with the standard control node shown in FIG. 1, the complex control node shown in FIG. 3 is more complicated in realizing automatic establishment and deletion of service connections. The current standard recommendations and other technical forums have not yet covered the implementation of such complex control nodes. Summary of the invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above technical problems, and an object thereof is to provide a complex control node in an automatic switching transport network to solve the problem that a transport plane composed of a plurality of transport nodes share a control plane.

Another object of the present invention is to provide a connection control method for the above complex control node in an ASTN network to perform functions such as automatic establishment, deletion, and link failure processing of a connection.

According to one aspect of the invention, a complex control node in an automated switched transport network is provided, comprising:

a global control node for implementing interaction with other control nodes or users within the automated switched transport network;

The local control node is configured to implement control on the local transmission network according to the control information of the global control node.

Preferably, the global control node further includes:

Global control plane, including:

- a network call controller for handling call requests from other control nodes or users in the automatic switched transport network;

- a first connection controller for handling connection requests of other control nodes or users in the automatic switching transport network;

a first routing controller, configured to maintain topology information of the automatic switched transport network, provide routing information of the network, and broadcast link state information of the global transport plane; a first link resource manager for providing link state information of the global transport plane and/or adapting information transmitted by the first connection controller;

A global transport plane that abstracts the interior of the boundary as a logical transport node and the boundary link as its input and output link, based on the boundaries of the local transport network.

Preferably, the local control node further includes:

Local control plane, including:

a second connection controller for processing information from the global control plane and link failure information of the local transmission plane;

a second routing controller, configured to provide routing information within the local control node;

a second link resource manager for providing link state information of the local transport plane and/or transmitting connection setup or release information to the local transport plane;

The local transport plane consists of a local transport network.

According to another aspect of the present invention, a connection control method for the above complex control node is provided, comprising the steps of:

The first connection controller receives the connection request of the other control node or the user in the automatic transmission network;

Query the routing information of the network as needed;

The first connection controller sends link control information to the first link resource manager;

The link control information is sent to the second connection controller after being adapted by the first link resource manager;

The second connection controller queries the second routing controller for the routing information of the connection, and sends the resource processing information to the second link resource manager;

The second link resource manager sends the connection information to the network element associated with the connection in the local delivery network;

Returning response information from the network element to the first connection controller.

Preferably, the step of determining whether to query the routing information of the network further includes: determining, by the first connection controller, whether the routing information of the network needs to be queried according to the rerouting manner; if necessary, querying the first routing controller, and Get routing information. Preferably, if the boundary link of the global transmission plane in the complex control node fails, the connection control method further includes:

The network element at the fault boundary link sends link failure information to the second link resource manager; the second link resource manager sends the link failure information to the first link resource manager;

The first link resource manager forwards the link failure information to the first routing controller; the first routing controller broadcasts the link failure information to other control nodes within the automatic delivery network.

Preferably, if the link in the local transmission plane in the complex control node fails, the connection control method further includes:

The network element at both ends of the faulty link sends link fault information to the second link resource manager; the second link resource manager forwards the link fault information to the second connection controller and the second routing controller respectively;

The second connection controller queries the second routing controller to obtain routing information of the newly restored connection;

The second connection controller sends resource reservation information to the second link resource manager; and the second link resource manager sends connection establishment information to the network element related to the newly established restoration connection, and receives the response information.

The present invention also provides a connection control method for the above complex control node, comprising the following steps: The first connection controller receives a connection request of another control node or user in the automatic transmission network;

Determine whether you need to query the routing information of the network;

The first connection controller queries the first link resource manager for link state information;

The first connection controller converts the link control information into connection control information according to the link state information, and sends the link control information to the second connection controller;

The second link resource manager sends a connection to the network element related to the connection in the local transport network Receiving information;

Preferably, in the method, the second connection controller sends the connection information to the network element related to the connection in the local transmission network, which specifically includes:

The second connection controller queries the second routing controller for the routing information of the connection, and queries the second link resource manager for the link state information;

The second connection controller generates connection information for transmission to the network element associated with the connection in the local delivery network.

Determine whether you need to query the routing information of the network;

The second connection controller generates connection information to the network element associated with the connection in the local delivery network;

Preferably, in the connection control method, the connection control information is sent by the first connection controller to the second connection controller, which specifically includes:

The first connection controller queries the first link resource manager for link state information of the local transport plane;

The first connection controller converts the link control information into connection control information according to the link state information, and transmits the link control information to the second connection controller.

Preferably, if the link in the local transmission plane in the complex control node fails, the connection control method further includes: The network element at the two ends of the faulty link sends the link fault information to the second link resource manager; the second link resource manager forwards the link fault information to the second connection controller and the second route controller respectively;

The second connection controller queries the second link resource manager for link state information; and the second connection controller generates connection establishment information, and sends and receives response information to the network element related to the newly created recovery connection.

According to the invention, the complex control node is decomposed into two logical control nodes to complete separately

The control of the ASTN network and the local transport network has the advantages of simplicity and reliability; and through the connection control of complex control nodes, the functions of connection establishment, release and fault handling can be completed. DRAWINGS

1 is a schematic diagram of a standard control node of an ASTN network in the prior art;

2 is a schematic diagram of an ASTN network in the prior art;

Figure 3 is a schematic diagram of a complex control node of an ASTN network;

4 is a schematic diagram of a complex control node in accordance with one embodiment of the present invention;

Figure 5 is a schematic illustration of a connection control method for a complex control node in accordance with one embodiment of the present invention;

6 is a schematic diagram of a connection control method of a complex control node according to another embodiment of the present invention;

7 is a schematic diagram of a connection control method of a complex control node according to still another embodiment of the present invention;

Figure 8 is a diagram showing an embodiment of a boundary link failure process in the connection control method of the present invention;

Figure 9 is a diagram showing an embodiment of link failure processing between network elements in a local transmission network in the connection control method of the present invention;

FIG. 10 is a diagram showing a link between network elements in a local transmission network in the connection control method of the present invention, A schematic of another embodiment of a barrier process. detailed description

The above described objects, features and advantages of the present invention will become more apparent from the detailed description of the appended claims.

With regard to Fig. 1, Fig. 2, and Fig. 3, description has been made in the background art, and the description thereof is omitted here. The core idea of the present invention is to decompose a complex control node into two logical control nodes according to the framework structure of the ASTN network, and perform related ASTN functions according to the layered idea.

The present invention will be specifically described below by taking the ASTN network and the complex control node 2 shown in Fig. 2 as an example. 4 is a schematic diagram of a complex control node in accordance with an embodiment of the present invention. As shown in FIG. 4, the complex control node includes a global control node that performs interaction with other control nodes (eg, control nodes 1, 3) or ASTN network users of the ASTN network, and is controlled by a Global Control Plane (GCP). It is composed of a Global Transport Plane (GTP). The complex control node further includes a local control node, which implements control of the local transport network according to the control information of the global control node, and is composed of a Local Control Plane (LCP) and a Local Transport Plane (LTP). . Thus, the complex control node shown in Figure 3 can be decomposed into two logical control nodes, a global control node and a local control node.

Further, the global control plane GCP includes: a network call controller NCC (Network Call Controller), a connection controller CC (Connection Controller), a routing controller RC (Routing Controller), and a link resource manager LRM (Link Resource Manager). The network call controller NCC of the GCP can receive call requests from other control nodes or ASTN network users in the ASTN network, and process according to the processing procedures in the standard control node. The connection controller CC of the GCP can receive connection requests from other control nodes or ASTN network users in the ASTN network, and process according to the processing in the standard control node. The GCP routing controller RC maintains the topology information of the ASTN network, and can receive the routing query request of the GCP connection controller CC to provide routing information of the network. The routing controller RC of the GCP can also receive the chain status sent by other control nodes in the ASTN network (if the link is available, the link is not The available, link busy, etc. information, and broadcasts the link state information of the local global transport plane GTP, including the state of the border link 1-5, and the processing procedure is the same as in the standard control node. The link resource manager LRM of the GCP can receive the link control information sent by the connection controller CC of the GCP, including establishing a subnet connection SNC (Sub Network Connection), releasing the subnet connection, and adapting the link control information. It is then forwarded to the local control plane LCP. The link resource manager LRM of the GCP can also receive link state information of the global transport plane GTP.

Global Transport Plane GTP is a logical transport node that completely encapsulates the internal topology of the local transport network, with only the border links visible to other control nodes within the ASTN network. The global transport plane GTP can be determined in the following manner: Determining the boundary of the local transport network, taking the control node 2 of FIG. 2 as an example, the outer links 1, 2, 3, 4 surrounding the transport nodes N1, N2, N3, N4 and N5 And 5 determine the boundary, and then abstract the interior of the boundary as a logical transfer node, and the boundary links 1 to 5 serve as input and output links of the global transfer plane GTP.

In addition, the local control plane LCP includes: a connection controller _CCsub that processes link control information of the link resource manager LRM from the GCP and link failure information of the local transport plane LTP; the routing controller _RCsub can be provided at The routing information in the local control node; the link resource manager LRM _sub receives the link state information of the local transport plane LTP and/or sends connection establishment or release information to the network element in the local transport plane LTP.

Local Transport Plane LTP consists of a local transport network, such as transport nodes N1, N2, N3, N4, N5 and the links between the above mentioned nodes.

As can be seen from the above description, with the present embodiment, the complex control node can be composed of two logical control nodes that implement control of the ASTN network and the local transport network in accordance with the layered idea.

When the complex control node processes the call request of other control nodes or ASTN network users in the ASTN network, it is accepted and processed by the GCP network call controller. The processing flow is the same as that of the standard control node. Therefore, it will not be described in detail here. .

5 is a schematic diagram of a connection control method of a complex control node in which the flow direction and processing order of signals are expressed in the form of "arrow + number" according to an embodiment of the present invention. As shown in Figure 5, the GCP connection controller CC first receives other control nodes or users in the ASTN network. A connection request (arrow 1), such as receiving a connection request from control node 1. After receiving the connection request, the connection controller CC of the GCP determines, according to the rerouting manner, whether it needs to query the routing controller RC of the GCP for the routing information of the connection that is requested to be established. If a query is needed, a query request (arrow 2) is sent to the routing controller RC of the GCP, and the returned routing result information (arrow 3) is obtained. If no query is required, or the routing result information is obtained, the connection controller CC of the GCP sends link control information (arrow 4) to the link resource manager LRM of the GCP according to the information carried in the received connection request, where the link is empty. The system information includes a subnet connection establishment or a subnet connection release. In this embodiment, for example, a subnet connection of the 1 and 4 links of the GTP may be established. After receiving the chain information, the link resource manager LRM of the GCP adapts the chain information according to the mapping relationship, converts the link control information of the GCP level into a connection request of the LCP level, and then adjusts the LCP level after the adaptation. The connection request is forwarded to the LCP's connection controller CC _sub (arrow 5).

After receiving the LCP level connection request, the LCP connection controller CC _sub queries the LCP route controller RC _sub (arrow 6) to obtain the connection routing information (arrow 7), for example, for establishing the 1 and 4 links. The subnet connection, the obtained routing information for establishing a connection may be "N1 → N5 → N4". And, the connection controller CC _{sub of} the LCP sends resource processing information (arrow 8) to the link resource manager LRM _{sub of the} LCP, where the resource processing information includes resource reservation information or resource release information; in this embodiment, Is resource reservation information. The link resource manager LRM _{sub of the} LCP sends connection information to the network element related to the connection in the local transport network, for example, sends to Nl, N5, N4 (arrows 9a, 9b, 9c) SNC and link connection LC establishment information . The link resource manager LRM _{sub of the} LCP then receives response information (arrows 10a, 10b, 10c) from these network elements and forwards it to the connection controller CC _sub (arrow 11) of the LCP. The response information is then returned by the LCP's connection controller CC _sub to the GCP's link resource manager LRM (arrow 12) and then to the GCP's connection controller CC (arrow 13). The connection controller CC of the GCP determines whether to continue to transmit the connection request (arrow 14) based on the returned response information.

If the connection request is a # put connection, the link control information generated by the connection controller CC of the GCP may be, for example, a subnet connection that releases 1, 4 links. In this case, the routing information obtained by the connection controller CC _{sub of the} LCP may be "N1→N5→N4", and the resource release information is transmitted to the link resource manager LRM _{sub of the} LCP. Finally, link resource management by LCP The LRM _sub sends SNC and LC release information to N1, N5, N4.

Preferably, the chain information includes a subnet connection establishment or a subnet connection release; and the resource processing information includes resource reservation information or resource release information.

6 is a schematic diagram of a connection control method of a complex control node according to another embodiment of the present invention. As shown in FIG. 6, first, the connection controller CC of the GCP receives a connection request (arrow 1) of other control nodes or users in the ASTN network, such as receiving a connection request from the control node 1. After receiving the connection request, the connection controller CC of the GCP determines whether it needs to query the routing controller RC of the GCP for routing information according to the rerouting manner. If a query is required, a query request (arrow 2) is sent to the routing controller RC of the GCP, and the returned routing result information (arrow 3) is obtained. If no query is required, or the routing result information is obtained, the connection controller CC of the GCP sends a link query request (arrow 4) to the link resource manager LRM of the GCP according to the information carried by the connection request, requesting to query the link of the GTP. status information. The link resource manager LRM of the GCP returns the relevant link state information (arrow 5), for example, the links 1 and 4 of the GTP are idle. Then, the connection controller CC of the GCP converts the link control information into the connection control information of the LCP according to the received link state information, for example, converting the "establishing GTP 1, 4 link SNC" into the LCP "connection" Establish "information and pass to the LCP connection controller CC _sub (arrow 6).

After receiving the connection control information, the LCP connection controller CC _sub queries the RCP routing controller RC _sub (arrow 7) to obtain the connected routing information (arrow 8), for example, for establishing the subnet connection of the 1 and 4 links. The obtained routing information of the connection may be "N1→N5→N4,,. Moreover, the connection controller _{CCsub of} the LCP sends resource reservation information (arrow 9) to the link resource manager LRM _{sub of the} LCP. LCP chain The path resource manager LRM _sub sends connection information to the network element related to the connection in the local transmission network, for example, sends (arrows 10a, 11b, 11c) SNC and LC establishment information to N1, N5, N4. Then the link resource of the LCP The manager LRM _sub receives response information (arrows 11a, lib, 11c) from these network elements and forwards them to the connection controller CC _sub (arrow 12) of the LCP. The connection information CC _{sub of the} LCP returns the response information to the GCP. The connection controller CC (arrow 13). The connection controller CC of the GCP determines whether to continue the connection request (arrow 14) based on the returned response information. As can be seen from the above description, in this embodiment, the link resource manager LRM of the GCP does not perform adaptation of the link control information for establishing or releasing the SNC, but is connected by the GCP. The controller CC communicates directly with the connection controller CC _{sub of the} LCP.

Further, in the embodiment shown in FIG. 6, the connection controller CC _{sub of the} LCP may also send connection information to the network element related to the connection in the local transmission network, which specifically includes: when the connection controller CC of the LCP _After receiving the connection control information, the _sub query the routing information of the LCP routing controller RC _sub , and query the link resource manager LRM _{sub of the} LCP for link state information, for example, links N1→N5 and N5→N4 idle. . The connection controller CC _{sub of the} LCP then generates connection information based on the above information and transmits it to the relevant network element in the local transmission network.

As can be seen from the above description, this embodiment may be used when the link resource manager LRM _{sub of the} LCP does not have the connection information sent to the network element.

Figure 7 is a diagram showing a connection control method of a complex control node according to still another embodiment of the present invention. As shown in Figure 7, first, the connection controller CC of the GCP receives a connection request (arrow 1) from other control nodes or users in the ASTN network, such as receiving a connection request from the control node 1. After receiving the connection request, the GCP connection controller CC determines whether it needs to query the routing controller RC of the GCP for routing information according to the rerouting mode. If a query is required, a query request (arrow 2) is sent to the routing controller RC of the GCP, and the returned routing result information (arrow 3) is obtained. If no query is required, or the routing result information is obtained, the connection controller CC of the GCP sends the chain information (arrow 4) to the link resource manager LRM of the GCP according to the information carried in the received connection request, for example, establishing GTP. 1, 4 link subnet connection.

After receiving the link control information, the link resource manager LRM of the GCP adapts the link control information and then forwards the adapted link control information to the connection controller CC _{sub of the} LCP (arrow 5).

After receiving the link control information, the LCP connection controller CC _sub queries the RCP routing controller RC _sub (arrow 6) to obtain the connected routing information (arrow 7), for example, for establishing the subnet of the 1 and 4 links. Connection, the obtained routing information of the connection can be "N1 → N5 → N4". Then, the connection controller CC _{sub of} the LCP queries the link resource manager LRM _{sub of the} LCP (arrow 8) to obtain link state information (arrow 9), for example, links N1 → N5 and N5 - N4 are idle. Then the connection controller CC _{sub of the} LCP is based on the obtained routing information and link state information of the connection. The SNC and LC setup information is generated and sent to the relevant network elements in the local transport network (arrows 10a, 10b, 10c). The connection controller CC _{sub of the} LCP then receives response information (arrows 11a, lib, 11c) from these network elements and forwards it to the link resource manager LRM (arrow 12) of the GCP. The response information is then returned to the GCP connection controller CC (arrow 13) by the link resource manager LRM of the GCP. The connection controller CC of the GCP determines whether to continue to transmit the connection request (arrow 14) based on the returned response information.

In this embodiment, the connection control controller CC of the GCP may also send the connection control information to the connection controller CC of the LCP, including: After the routing information is not needed, the connection controller CC of the GCP carries the connection request according to the connection request. The information is queried to the link resource manager LRM of the GCP for the link state information of the GTP, and the link resource manager LRM of the GCP returns the relevant link state information, and then the connection controller CC of the GCP receives the relevant link according to the link. The status information converts the link control information into connection control information of the LCP and transmits it to the connection controller CC _{sub of the} LCP.

Figure 8 is a schematic diagram of one embodiment of a boundary link failure process in the connection control method of the present invention, which can be applied in the methods shown in Figures 5, 6 and 7.

As shown in FIG. 8, if the boundary link 4 of the complex control node fails, the link failure information (arrow) is first sent to the link resource manager LRM _{sub of the} LCP by the network element at the fault boundary link, for example, N4. La). Then, the link resource manager LRM _{sub of} the LCP forwards the link failure information to the link resource manager LRM (arrow 2) of the GOP, and then the link resource manager LRM of the GCP sends the route controller RC to the GCP. (arrow 3). After receiving the link failure information, the routing controller RC of the GCP broadcasts the link failure information (arrow 4) to other control nodes in the ASTN network.

Figure 9 is a diagram showing an embodiment of link failure processing between network elements in a local transmission network in the connection control method of the present invention, which can be applied in the methods shown in Figures 5 and 6.

As shown in Figure 9, if the link in the local transport plane LTP of the complex control node fails, for example, the N1-N5 link fails, first, the network elements at both ends of the faulty link are the links of N1 and N5 to the LP. The resource manager LRM _sub sends link failure information (arrows la, lb). Then, the LCP link resource manager LRM _sub is connected to the LCP connection controller CC _sub and the road respectively. The link failure information (arrows 2a, 2b) is forwarded by the controller RC _sub . Then, the connection controller CC _{sub of} the LCP queries the routing controller RC _{sub of the} LCP (arrow 3) to obtain routing information (arrow 4) of the newly restored connection, for example, new routing information "N1→N2→N3-N4", And the resource reservation information (arrow 5) is sent to the link resource manager LRM _{sub of the} LCP. After receiving the resource reservation information of the connection controller CC _sub of the LCP, the link resource manager LRM _{sub of} the LCP sends connection establishment information to the network element related to the newly established recovery connection in the local transmission network, for example, to Nl, N2, and N3. And N4 sends SNC and LC setup information (arrows 6a, 6b, 6c, 6d) and receives response information (arrows 7a, 7b, 7c, 7d).

Figure 10 is a diagram showing another embodiment of link failure processing between network elements in a local transmission network in the connection control method of the present invention, which can be applied in the method shown in Figure 7.

As shown in FIG. 10, if the link in the local transport plane LTP in the complex control node fails, for example, the link N1-N5 fails, first, the network element at both ends of the faulty link goes to the link resource manager of the LCP. The LRM _sub sends link failure information (arrows la, lb). Next, the link resource manager LRM _{sub of} the LCP forwards the link failure information (arrows 2a, 2b) to the connection controller CC _sub and the route controller RC _{sub of the} LCP, respectively. The LCP connection controller CC _sub queries the RCP routing controller for RC _sub (arrow 3) to obtain the routing information of the newly restored connection (arrow 4), for example, new routing information "N1→N2→N3→N4,, and The LCP connection controller CC _sub queries the link resource manager LRM _{sub of the} LCP (arrow 5) to obtain the relevant link state information (arrow 6), for example, the Nl-N2, N2-N3, and N3-N4 links are idle. Then, the LCP connection controller CC _sub generates connection establishment information according to the acquired routing information and link state information, and sends the connection establishment information to the relevant network element, for example, sends SNC and LC establishment information to Nl, N2, N3, and N4 (arrow 7a, 7b, 7c, 7d), and receive response information (arrows 8a, 8b, 8c, 8d). Industrial Applicability

The invention can be applied to complex control nodes in networks such as ASTN and ASON.

Claims

Rights request

A complex control node in an automatic switched transport network, comprising: a global control node for implementing interaction with other control nodes or users within the automatically switched transport network;

The complex control node according to claim 1, wherein the global control node further comprises:

Global control plane, including:

a first routing controller, configured to maintain topology information of the automatic switched transport network, provide routing information of the network, and broadcast link state information of the global transport plane;

a first link resource manager for providing link state information of the global transport plane and/or adapting information sent by said first connection controller;

The complex control node according to claim 2, wherein the local control node further comprises:

Local control plane, including:

a second routing controller for providing routing information within the local control node; a second link resource manager for providing link state information of the local transport plane and/or for transmitting a connection to the local transport plane Establish or release information; and The local transport plane consists of a local transport network.

4. A method of controlling connection of a complex control node according to claim 3, comprising the steps of:

Query the routing information of the network as needed;

The first connection controller sends link control information to the first link resource manager; the link control information is sent to the second connection controller after being adapted by the first link resource manager;

The connection control method according to claim 4, wherein the step of determining whether the routing information of the network needs to be queried further comprises:

The first connection controller determines, according to the rerouting manner, whether the routing information of the network needs to be queried;

If necessary, query the first routing controller and obtain routing information.

The connection control method according to claim 4 or 5, wherein if the boundary link of the global transmission plane in the complex control node fails, the connection control method further includes:

The first link resource manager forwards the link failure information to the first routing controller; and

The first routing controller broadcasts the link fault message to other control nodes in the automatic transmission network. Interest.

The connection control method according to claim 4 or 5, wherein, if the link in the local transmission plane in the complex control node fails, the connection control method further includes:

8. A method of controlling connection of a complex control node according to claim 3, comprising the steps of:

Determine whether you need to query the routing information of the network;

The first connection controller queries the first link resource manager for link state information; the first connection controller converts the link control information into connection control information according to the link state information, and sends the link control information to the second connection controller;

The response information is returned from the network element to the first connection controller.

The connection control method according to claim 8, wherein the step of determining whether to query routing information of the network further comprises:

The first connection controller determines, according to the rerouting manner, whether the routing information of the network needs to be queried; as well as

The connection control method according to claim 8, wherein in the method, the sending, by the second connection controller, the connection information to the network element related to the connection in the local transmission network includes:

The connection control method according to any one of claims 8 to 10, wherein, if the boundary link of the global transmission plane in the complex control node fails, the connection control method further includes:

The first routing controller broadcasts the link failure information to other control nodes within the automatic delivery network.

The connection control method according to any one of claims 8 to 10, wherein, if the link in the local transmission plane in the complex control node fails, the connection control method further includes:

The second connection controller sends resource reservation information to the second link resource manager; The second link resource manager sends connection establishment information to the network element related to the newly established restoration connection, and receives the response information.

13. A method for controlling connection of a complex control node according to claim 3, comprising the steps of:

Determine whether you need to query the routing information of the network;

The first connection controller sends the link control information to the first link resource manager; the link control information is sent to the second connection controller after being adapted by the first link resource manager;

The connection control method according to claim 13, wherein the step of determining whether the routing information of the network needs to be queried further comprises:

The first connection controller determines, according to the rerouting manner, whether to query routing information of the network; if necessary, queries the first routing controller, and obtains routing information.

The connection control method according to claim 13, wherein in the connection control method, the connection control information is sent by the first connection controller to the second connection controller, which includes:

The connection control method according to any one of claims 13 to 15, wherein if the boundary link of the global transmission plane in the complex control node fails, the connection The connection control method also includes:

The connection control method according to any one of claims 13 to 15, wherein if the link in the local transmission plane in the complex control node fails, the connection control method further includes:

The second connection controller queries the second link resource manager for link state information; and the second connection controller generates connection establishment information, and sends and receives response information to the network element related to the newly established recovery connection.