CN114374896A - Optical layer connection configuration method, method and device for establishing optical layer connection - Google Patents

Abstract

The invention provides a method for configuring an optical layer connection, a method and a device for establishing an optical layer connection, and relates to the technical field of communications. The method includes: receiving a service request; determining routing information of an optical layer connection to be established according to the service request; Two target OTN nodes in the two OTN nodes send management and control signaling; wherein, the management and control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the sink node on the optical layer connection path; the optical cross-routing table is used to indicate the output direction from the first OTN node to at least one second OTN node. The solution of the present invention solves the problem that there are many signaling interactions between the control device and the OTN node in the current way of establishing the optical layer connection, which affects the efficiency of establishing the optical layer connection.

Description

Optical layer connection configuration method, method and device for establishing optical layer connection

technical field

The present invention relates to the technical field of communications, in particular to a method for configuring an optical layer connection, a method and a device for establishing an optical layer connection.

Background technique

In an optical transport network (optical transport network, OTN), an optical layer connection can be controlled and established by a centralized software defined network (Software Defined Network, SDN) control device. As shown in Figure 1, the current way to establish an optical layer connection is: the control device obtains the resource information of each OTN node in the OTN network to form a global topology; when a service request is input, the control device performs route calculation according to the input, and based on the route calculation As a result, signaling is exchanged with all OTN nodes in the connection path to configure the optical cross-connect and realize the creation and opening of the optical layer connection. The current method of establishing an optical layer connection requires the control device to interact with each OTN node in the connection path, resulting in more signaling interactions between the control device and the OTN node. ) requirements, and each OTN node of the connection path needs to be configured through the control device, resulting in a high dependence on the control device for the establishment of the optical layer connection. If the control device and an OTN node of the connection path cannot exchange signaling, it will As a result, the optical layer connection cannot be established, which affects the efficiency of the optical layer connection establishment.

SUMMARY OF THE INVENTION

The present invention provides a method for configuring an optical layer connection, a method and device for establishing an optical layer connection, so as to solve the problem that there are many signaling interactions between a control device and an OTN node in the current method of establishing an optical layer connection, which affects the efficiency of establishing an optical layer connection. The problem.

In order to achieve the above object, an embodiment of the present invention provides an optical layer connection configuration method, which is applied to a control device, and the method includes:

receive business requests;

According to the service request, determine the routing information of the optical layer connection to be established;

According to the routing information and the optical cross-routing table of the multiple OTN nodes of the optical transport network, send control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established;

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the sending of management and control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established includes:

Send the first control signaling to the first target node of the two target OTN nodes for indicating that the first target node is the source node on the optical layer connection path, and send the first control signaling to the two target OTN nodes The second target node in the nodes sends second management and control signaling for indicating that the second target node is the sink node on the optical layer connection path.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node.

Optionally, the second management and control signaling carries wavelength information, input port information and output port information.

Optionally, before sending the control signaling to two of the multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing table of the multiple OTN nodes, Also includes:

Obtain the cross-capability information of each OTN node in multiple OTN nodes;

According to the cross-connect capability information of each OTN node, the corresponding optical cross-routing table of each OTN node is configured.

Optionally, configuring the optical cross-connect routing table corresponding to each OTN node according to the cross-connect capability information of each OTN node includes:

Traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is any one of the multiple OTN nodes;

Traverse optical cross-connect capability information of at least one second OTN node, and determine second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein the second OTN nodes are the multiple OTNs OTN nodes other than the first OTN node in the nodes;

According to the first routing information and the second routing information, an optical cross-routing table of the first OTN node is established.

In order to achieve the above object, an embodiment of the present invention provides an optical layer connection configuration device, which is applied to a control device, and the device includes:

A receiving module for receiving service requests;

a determining module, configured to determine the routing information of the optical layer connection to be established according to the service request;

a sending module, configured to send management and control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing tables of the multiple OTN nodes;

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the sending module includes:

A sending unit, configured to send a first control signaling for indicating that the first target node is a source node on the optical layer connection path to the first target node of the two target OTN nodes, and send the first control signaling to the first target node of the two target OTN nodes. The second target node of the two target OTN nodes sends second management and control signaling for indicating that the second target node is the sink node on the optical layer connection path.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node.

Optionally, the second management and control signaling carries wavelength information, input port information and output port information.

Optionally, the device further includes:

an acquisition module, used to acquire the cross-capability information of each OTN node in the multiple OTN nodes;

The configuration module is configured to configure the corresponding optical cross-connect routing table of each OTN node according to the cross-connect capability information of each OTN node.

Optionally, the configuration module includes:

a first configuration unit, configured to traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is the multiple OTN nodes any one of;

The second configuration unit is configured to traverse the optical cross-connect capability information of at least one second OTN node, and determine the second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein, the second OTN node The node is an OTN node other than the first OTN node among the plurality of OTN nodes;

A third configuration unit, configured to establish an optical cross-routing table of the first OTN node according to the first routing information and the second routing information.

To achieve the above object, an embodiment of the present invention provides a control device, including a processor and a transceiver, wherein,

the transceiver is used for receiving service requests;

The processor is configured to determine the routing information of the optical layer connection to be established according to the service request; Two target OTN nodes in the multiple OTN nodes on the layer connection path send management and control signaling;

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the processor is further configured to: send, to the first target node of the two target OTN nodes, a first target node indicating that the first target node is the source node on the optical layer connection path. management and control signaling, and sending a second management and control signaling to the second target node of the two target OTN nodes for indicating that the second target node is the sink node on the optical layer connection path.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node.

Optionally, the second management and control signaling carries wavelength information, input port information and output port information.

Optionally, the transceiver is further configured to: acquire cross-capability information of each OTN node in the multiple OTN nodes;

The processor is further configured to configure a corresponding optical cross-connect routing table of each OTN node according to the cross-connect capability information of each OTN node.

Optionally, the processor is used for further:

Traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is any one of the multiple OTN nodes;

Traverse optical cross-connect capability information of at least one second OTN node, and determine second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein the second OTN nodes are the multiple OTNs OTN nodes other than the first OTN node in the nodes;

According to the first routing information and the second routing information, an optical cross-routing table of the first OTN node is established.

In order to achieve the above object, an embodiment of the present invention provides a control device, including: a transceiver, a processor, a memory, and a program or instruction stored on the memory and executable on the processor; the processor The steps of the optical layer connection configuration method as described above are implemented when the program or instruction is executed.

To achieve the above object, embodiments of the present invention provide a readable storage medium on which programs or instructions are stored, and when the programs or instructions are executed by a processor, implement the steps of the optical layer connection configuration method described above.

In order to achieve the above object, an embodiment of the present invention also provides a method for establishing an optical layer connection, which is applied to a target OTN node, and the method includes:

Receive the control signaling sent by the control device;

According to the management and control signaling, the target OTN node is used as the source node or the sink node among the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established.

Optionally, the target OTN node is the first target node;

The control signaling sent by the receiving control device includes:

Receive the first management and control signaling sent by the control device; wherein, the first management and control signaling is used to indicate that the first target node is the source node on the optical layer connection path, and the first management and control signaling Carrying wavelength information, input port information, output port information and ID information of the sink node;

According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. ,include:

The optical cross-connect is configured according to the input port information and the output port information carried by the first control signaling.

Optionally, after receiving the first control signaling sent by the control device, the method further includes:

Configure the optical label information by means of top adjustment; wherein, the optical label information includes: the ID information of the first target node, the wavelength information and the ID information of the sink node;

Sending the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, the target OTN node is a second target node;

The control signaling sent by the receiving control device includes:

Receive the second management and control signaling sent by the control device; wherein, the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path, and the second management and control signaling Carrying wavelength information, input port information and output port information;

According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. ,include:

The optical cross-connect is configured according to the input port information and the output port information carried by the second control signaling.

In order to achieve the above object, an embodiment of the present invention further provides a device for establishing an optical layer connection, which is applied to a target OTN node, and the device includes:

The receiving module is used to receive the control signaling sent by the control device;

The processing module is configured to use the target OTN node as a source node or a sink node in the multiple OTN nodes on the optical layer connection path according to the control signaling, and establish the multiple OTN nodes on the optical layer connection path. Optical layer connection.

Optionally, the target OTN node is the first target node;

The receiving module includes:

a first receiving unit, configured to receive the first management and control signaling sent by the control device; wherein, the first management and control signaling is used to indicate that the first target node is the source node on the optical layer connection path, The first control signaling carries wavelength information, input port information, output port information and ID information of the sink node;

The processing module includes:

A first processing unit, configured to configure an optical cross-connect according to the input port information and output port information carried by the first control signaling.

Optionally, the device further includes:

a configuration module, configured to configure optical label information by means of top adjustment; wherein, the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node;

A sending module, configured to send the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, the target OTN node is a second target node;

The receiving module includes:

a first receiving unit, configured to receive the second management and control signaling sent by the control device; wherein the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path, The second control signaling carries wavelength information, input port information and output port information;

The processing module includes:

The second processing unit is configured to configure the optical cross-connect according to the input port information and the output port information carried by the second management and control signaling.

To achieve the above object, an embodiment of the present invention further provides an OTN node, where the OTN node is a target OTN node, including: a transceiver and a processor;

The transceiver is used to receive the control signaling sent by the control device;

The processor is configured to, according to the management and control signaling, take the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path, and establish a relationship between the multiple OTN nodes on the optical layer connection path. Optical layer connection.

Optionally, the target OTN node is the first target node;

The transceiver is further configured to: receive a first management and control signaling sent by the control device; wherein the first management and control signaling is used to indicate that the first target node is a source node on the optical layer connection path , the first control signaling carries wavelength information, input port information, output port information and ID information of the sink node;

The processor is further configured to configure the optical cross-connect according to the input port information and the output port information carried by the first control signaling.

Optionally, the processor is further configured to configure optical label information by means of top adjustment; wherein, the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node;

The transceiver is further configured to: send the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, the target OTN node is a second target node;

The transceiver is further configured to: receive the second management and control signaling sent by the control device; wherein, the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path , the second control signaling carries wavelength information, input port information and output port information;

The processor is further configured to configure the optical cross-connect according to the input port information and the output port information carried by the second control signaling.

In order to achieve the above object, an embodiment of the present invention also provides a method for establishing an optical layer connection, which is applied to an OTN node, where the OTN node is a plurality of OTN nodes on the optical layer connection path, except the source node and the sink node. The intermediate node, the method includes:

receiving the optical label information sent by the first target node;

According to the optical label information and the input port receiving the optical label information, the optical cross-routing table corresponding to the intermediate node is matched to determine the output port corresponding to the intermediate node; wherein, the optical cross-routing table uses for indicating the output direction of the intermediate node to at least one third OTN node;

Optical cross-connects are configured according to the input ports and the output ports.

In order to achieve the above object, an embodiment of the present invention also provides a device for establishing an optical layer connection, which is applied to an OTN node, where the OTN node is a plurality of OTN nodes on the optical layer connection path, except the source node and the sink node. The intermediate node, the device includes:

a receiving module, configured to receive the optical label information sent by the first target node;

a determining module, configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, and determine the output port corresponding to the intermediate node; wherein, the The optical cross-routing table is used to indicate the output direction of the intermediate node to at least one third OTN node;

A processing module configured to configure an optical cross-connect according to the input port and the output port.

In order to achieve the above object, an embodiment of the present invention also provides an OTN node. The OTN node is an intermediate node other than the source node and the sink node among the multiple OTN nodes on the optical layer connection path, including: a transceiver and processor;

The transceiver is configured to receive the optical label information sent by the first target node;

The processor is configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, determine the output port corresponding to the intermediate node, and determine the output port corresponding to the intermediate node according to the The input port and the output port are configured with an optical cross-connect; wherein, the optical cross-routing table is used to indicate the output direction from the intermediate node to at least one third OTN node.

To achieve the above object, an embodiment of the present invention also provides an OTN node, including: a transceiver, a processor, a memory, and a program or instruction stored on the memory and executable on the processor; the processing When the computer executes the program or the instruction, the steps of the above-mentioned method for establishing an optical layer connection are implemented.

To achieve the above object, embodiments of the present invention further provide a readable storage medium on which programs or instructions are stored, and when the programs or instructions are executed by a processor, implement the steps of the above-described method for establishing an optical layer connection.

The beneficial effects of the above-mentioned technical solutions of the present invention are as follows:

In this embodiment of the present invention, in the case of receiving a service request, route calculation is performed according to the service request to determine the routing information of the optical layer connection to be established, and when the routing information of the optical layer connection to be established is obtained by calculation, combined with The optical cross-routing table of each OTN node sends management and control signaling to the source node and sink node in the optical layer connection path to be established, but does not send management and control signaling to other nodes in the optical layer connection path to be established. The signaling interaction between the control device and the OTN node is reduced, and it is beneficial to improve the efficiency of establishing an optical layer connection.

Description of drawings

Figure 1 is a schematic diagram of the interaction between a control device and an OTN node;

FIG. 2 is a flowchart of an optical layer connection configuration method according to an embodiment of the present invention;

3 is a block diagram of an optical layer connection configuration apparatus according to an embodiment of the present invention;

4 is a block diagram of a control device according to an embodiment of the present invention;

5 is a structural diagram of a control device according to an embodiment of the present invention;

FIG. 6 is one of the flowcharts of a method for establishing an optical layer connection according to an embodiment of the present invention;

FIG. 7 is the second flowchart of a method for establishing an optical layer connection according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of interaction between a control device and an OTN node according to an embodiment of the present invention;

9 is one of the block diagrams of an apparatus for establishing an optical layer connection according to an embodiment of the present invention;

10 is the second block diagram of an apparatus for establishing an optical layer connection according to an embodiment of the present invention;

FIG. 11 is a structural diagram of an OTN node according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the size of the sequence numbers of the following processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the implementation of the present invention The implementation of the examples constitutes no limitation.

Additionally, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

Optionally, the embodiment of the present invention provides an OTN system, which may include a control device and a plurality of OTN nodes. The control device and the OTN nodes may communicate with each other through management and control signaling, and the OTN nodes may communicate with each other through optical label information. Interaction to realize optical cross-connection.

As shown in FIG. 2 , a method for configuring an optical layer connection according to an embodiment of the present invention is applied to a control device, and the method may specifically include the following steps:

Step 21: Receive a service request.

Step 22: Determine the routing information of the optical layer connection to be established according to the service request.

Step 23: According to the routing information and the optical cross-routing tables of the OTN nodes of the optical transport network, send management and control signaling to two target OTN nodes in the OTN nodes on the optical layer connection path to be established.

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the control device may pre-create an optical cross-routing table corresponding to each OTN device, wherein the optical cross-routing table is used to indicate the output direction from the first OTN node to the at least one second OTN node, which can be understood as for The optical cross-routing table of the first OTN node is used to indicate the output direction (or output port) from the first OTN node to at least one second OTN node; wherein, the second OTN node may be the sink node on the optical layer connection path , or it can be an intermediate node on the optical layer connection path.

Optionally, the optical cross-routing table may only indicate the output direction (or output port) of the specified wavelength to the second OTN node, and is not limited to be reachable from the first OTN node to the second OTN node. For example, whether it is reachable from the first OTN node to the second OTN node may be determined by the control device in the process of route calculation based on factors such as transmission distance and loss.

Optionally, the control device may calculate the optical layer connection route and wavelength to be established based on OTN node topology information and user input information (such as source/sink nodes, ports, etc.). Optionally, due to the physical characteristics of the optical layer, the route with the minimum number of hops can be calculated under the premise of considering the reachability and loss of the optical transmission distance.

In the above scheme, in the case of receiving a service request, route calculation is performed according to the service request, and the routing information of the optical layer connection to be established is determined, and when the routing information of the optical layer connection to be established is obtained by calculation, it is combined with each. The optical cross-routing table of the OTN node sends management and control signaling to the source node and sink node in the optical layer connection path to be established, instead of sending management and control signaling to other nodes in the optical layer connection path to be established, thereby reducing the number of The signaling interaction between the control device and the OTN node is beneficial to improve the efficiency of establishing an optical layer connection.

Optionally, the step of sending management and control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established may specifically include:

Send the first control signaling to the first target node of the two target OTN nodes for indicating that the first target node is the source node on the optical layer connection path, and send the first control signaling to the two target OTN nodes The second target node in the nodes sends second management and control signaling for indicating that the second target node is the sink node on the optical layer connection path.

In this embodiment, the control device can ensure that the optical connection created on the optical layer connection path to be established is physically reachable through the result obtained by the route calculation, so it can directly deliver the first control signaling to the first target node, and The second control signaling is delivered to the second target node, so that multiple OTN nodes on the optical layer connection path to be established are configured with an optical cross-connection, and can ensure that the multiple OTN nodes on the optical layer connection path are physically reachable.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node. The second management and control signaling carries wavelength information, input port information and output port information.

In this embodiment, the control device delivers the first management and control signaling to the first target node, so that the first target node can configure the optical fiber corresponding to the wavelength according to the input port and the output port carried in the first management and control signaling cross-connect, and the control device delivers the second control signaling to the second target node, so that the second target node can configure the optical cross-connect corresponding to the wavelength according to the input port and output port carried in the second control signaling and the first target node may further send optical label information to the intermediate node, so that the intermediate node configures the optical cross-connection of the wavelength according to the optical label information, thereby establishing multiple optical connections on the optical layer connection path. The optical layer connection of multiple OTN nodes reduces the signaling interaction between the control device and the OTN node; wherein, the intermediate node is the source node and the sink node among the multiple OTN nodes except the source node and the sink node. OTN node.

Optionally, the step of sending management and control signaling to two OTN nodes in the multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing tables of multiple OTN nodes Before, the method may also specifically include:

Obtain the cross-capability information of each OTN node in multiple OTN nodes;

According to the cross-connect capability information of each OTN node, the corresponding optical cross-routing table of each OTN node is configured.

Optionally, the control device can obtain the device information of each OTN node in the OTN system to form a global topology; for example, the control device exchanges management and control signaling with each OTN node, and automatically obtains (or manually configures) device information through the control interface, The following data structures are formed: network element information (Ne), port information (Port), and cross capability (CrossAbility).

The network element information is shown in Table 1 below:

Table 1

Among them, the port information is shown in Table 2 below:

Table 2

Among them, the cross-capacity is shown in Table 3 below:

table 3

field type port 1id String port2id String wavelength String

Therefore, based on the above data structure, the optical cross-routing table of each OTN node can be configured.

Optionally, the step of configuring the respective optical cross-connect routing table corresponding to each OTN node according to the cross-connect capability information of each OTN node may specifically include:

Traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is any one of the multiple OTN nodes;

Traverse optical cross-connect capability information of at least one second OTN node, and determine second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein the second OTN nodes are the multiple OTNs OTN nodes other than the first OTN node in the nodes;

According to the first routing information and the second routing information, an optical cross-routing table of the first OTN node is established.

For example, the control device maintains an optical cross-routing table based on each OTN node. The optical cross-routing table may include the following information: wavelength, input port, sink node and output port (or output direction), for example: content of the optical cross-routing table As shown in Table 4 below:

Table 4

wavelength input port sink node output direction

The following describes the method for configuring the optical cross-connect routing table corresponding to an OTN node with specific examples:

For example, OTN node A has port a and port b, and the value of a piece of information in the cross-capacity table is shown in Table 5 below:

table 5

field value port 1id A.a.id port2id A.b.id wavelength λ

The configuration method of the optical cross-routing table for adjacent nodes is: traverse the cross-capacity table of OTN node A, and organize each piece of information into two routes. For example, add two pieces of information to the optical cross-connect routing table of the OTN node A, as shown in Table 6 below:

Table 6

wavelength input port sink node output port λ A.a.id A.b.peerNe A.b.id λ A.b.id A.a.peerNe A.a.id

The configuration method of the optical cross-connect routing table for non-adjacent nodes is as follows: in addition to configuring the routing information of the directly adjacent nodes in the optical cross-connect routing table, the control device also needs to add the multi-hop reachable routing information in the optical cross-connect routing table. The routing information of the sink node.

For example, the optical cross-connect routing table of OTN node A has the following information in Table 7:

Table 7

wavelength input port sink node output port λ A.a.id B A.b.id

The optical cross-routing table of OTN Node B has the following information in Table 8:

Table 8

wavelength input port sink node output port λ B.a.id C B.b.id

Based on the above content, the following information in Table 9 can be added to the optical cross-connect routing table of OTN node A:

Table 9

wavelength input port sink node output port λ A.a.id C A.b.id

The control device can iterate repeatedly in a similar manner as described above until the configuration of the optical cross-routing tables of all OTN nodes is completed. It should be noted that the configuration of the optical cross-routing table of each OTN node by the control device belongs to the initialization phase. After the configuration of the optical cross-routing table on each OTN node is completed, if the physical device or connection remains unchanged, the optical cross-routing table does not need to be configured. change, so as to ensure the efficiency of establishing an optical layer connection when a service request arrives.

As shown in FIG. 3, an embodiment of the present invention provides an optical layer connection configuration apparatus 300, which is applied to a control device. The apparatus 300 includes:

a receiving module 310, configured to receive a service request;

a determining module 320, configured to determine the routing information of the optical layer connection to be established according to the service request;

The sending module 330 is configured to send management and control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing tables of the multiple OTN nodes;

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the sending module 330 includes:

A sending unit, configured to send a first control signaling for indicating that the first target node is a source node on the optical layer connection path to the first target node of the two target OTN nodes, and send the first control signaling to the first target node of the two target OTN nodes. The second target node of the two target OTN nodes sends second management and control signaling for indicating that the second target node is the sink node on the optical layer connection path.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node.

Optionally, the second management and control signaling carries wavelength information, input port information and output port information.

Optionally, the apparatus 300 further includes:

an acquisition module, used to acquire the cross-capability information of each OTN node in the multiple OTN nodes;

The configuration module is configured to configure the corresponding optical cross-connect routing table of each OTN node according to the cross-connect capability information of each OTN node.

Optionally, the configuration module includes:

a first configuration unit, configured to traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is the multiple OTN nodes any one of;

The second configuration unit is configured to traverse the optical cross-connect capability information of at least one second OTN node, and determine the second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein, the second OTN node The node is an OTN node other than the first OTN node among the plurality of OTN nodes;

A third configuration unit, configured to establish an optical cross-routing table of the first OTN node according to the first routing information and the second routing information.

The apparatus in the embodiment of the present invention can implement the processes of the above-mentioned embodiments of the optical layer connection configuration method and achieve the same technical effect. To avoid repetition, details are not described here.

The apparatus 300 in the embodiment of the present invention, when receiving a service request, performs route calculation according to the service request, determines the routing information of the optical layer connection to be established, and obtains the routing information of the optical layer connection to be established by calculation Next, combined with the optical cross-routing table of each OTN node, send control signaling to the source node and sink node in the optical layer connection path to be established, but not to other nodes in the optical layer connection path to be established. order, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the efficiency of establishing an optical layer connection.

As shown in FIG. 4, a control device 400 according to an embodiment of the present invention includes a processor 410 and a transceiver 420, wherein,

The transceiver 420 is used for receiving service requests;

The processor 410 is configured to determine the routing information of the optical layer connection to be established according to the service request; Two target OTN nodes in the multiple OTN nodes on the established optical layer connection path send management and control signaling;

The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node.

Optionally, the processor 410 is further configured to: send, to the first target node of the two target OTN nodes, the first target node indicating that the first target node is the source node on the optical layer connection path. A management and control signaling, and sending a second management and control signaling to the second target node of the two target OTN nodes, which is used to indicate that the second target node is the sink node on the optical layer connection path.

Optionally, the first management and control signaling carries wavelength information, input port information, output port information, and ID information of the sink node.

Optionally, the second management and control signaling carries wavelength information, input port information and output port information.

Optionally, the transceiver 420 is further configured to: acquire the cross-capability information of each OTN node in the multiple OTN nodes;

The processor 410 is further configured to configure an optical cross-connect routing table corresponding to each OTN node according to the cross-connect capability information of each OTN node.

Optionally, the processor 410 is further configured to:

Traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is any one of the multiple OTN nodes;

Traverse optical cross-connect capability information of at least one second OTN node, and determine second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein the second OTN nodes are the multiple OTNs OTN nodes other than the first OTN node in the nodes;

According to the first routing information and the second routing information, an optical cross-routing table of the first OTN node is established.

The control device 400 in the embodiment of the present invention can implement the process of each embodiment of the optical layer connection configuration method and achieve the same technical effect. To avoid repetition, details are not described here.

The control device 400 in the embodiment of the present invention, in the case of receiving a service request, performs routing calculation according to the service request, determines the routing information of the optical layer connection to be established, and obtains the routing information of the optical layer connection to be established after calculation. In this case, combined with the optical cross-routing table of each OTN node, send control signaling to the source node and sink node in the optical layer connection path to be established, but not to other nodes in the optical layer connection path to be established. signaling, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the efficiency of establishing an optical layer connection.

A control device according to another embodiment of the present invention, as shown in FIG. 5 , includes a transceiver 510 , a processor 500 , a memory 520 , and a program or a program stored on the memory 520 and executable on the processor 500 . instruction; when the processor 500 executes the program or instruction, the steps of the above-mentioned optical layer connection configuration method are implemented, and the same technical effect is achieved. To avoid repetition, details are not repeated here.

The transceiver 510 is used to receive and transmit data under the control of the processor 500 .

5, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 500 and various circuits of memory represented by memory 520 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 510 may be multiple elements, ie, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium.

The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

A readable storage medium according to an embodiment of the present invention stores programs or instructions thereon. When the programs or instructions are executed by a processor, the steps in the optical layer connection configuration method described above can be implemented, and the same technology can be achieved. The effect, in order to avoid repetition, is not repeated here.

Wherein, the processor is the processor in the control device described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

As shown in FIG. 6 , an embodiment of the present invention further provides a method for establishing an optical layer connection, which is applied to a target OTN node. The method may specifically include the following steps:

Step 61: Receive the management and control signaling sent by the control device.

Step 62: According to the control signaling, take the target OTN node as the source node or sink node of the multiple OTN nodes on the optical layer connection path, and establish the optical layer of the multiple OTN nodes on the optical layer connection path. connect.

In this embodiment, the target OTN node is the first target node or the second target node, wherein the first target node can be used as the source node in the optical layer connection path, and the second target node can be used as the sink node in the optical layer connection path. In this way, the control device sends management and control instructions to the source node and the sink node in the optical layer connection path to be established, instead of sending control signaling to other nodes in the optical layer connection path to be established, thereby reducing the need for the control device and OTN. Signaling interaction between nodes is beneficial to improve the efficiency of establishing optical layer connections.

Optionally, when the target OTN node is the first target node, the step of receiving the management and control signaling sent by the control device may specifically include:

Receive the first management and control signaling sent by the control device; wherein, the first management and control signaling is used to indicate that the first target node is the source node on the optical layer connection path, and the first management and control signaling Carrying wavelength information, input port information, output port information and ID information of the sink node;

According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. The steps can specifically include:

The optical cross-connect is configured according to the input port information and the output port information carried by the first control signaling.

Optionally, when the target OTN node is the first target node, after the step of receiving the first control signaling sent by the control device, the method may further specifically include:

Configure the optical label information by means of top adjustment; wherein, the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node; sending the optical label information to the intermediate node; wherein, The intermediate node is an OTN node other than the source node and the sink node among the plurality of OTN nodes.

In this embodiment, the first target node receives the first management and control signaling issued by the control device, and configures an optical cross-connect corresponding to the wavelength according to the input port and output port carried in the first management and control signaling. And the first target node may further send optical label information to the corresponding intermediate node, so that the intermediate node configures the optical cross-connect of the wavelength according to the optical label information, thereby establishing the optical cross-connection from the source node to the sink node. , and the signaling interaction between the control device and the OTN device is reduced.

For example, the source node can configure the optical label information on the wavelength of the corresponding port by adjusting the top, and the optical label information can include the wavelength information (the wavelength information is the wavelength information input by the control device), the ID information of the source node (that is, the The ID information of the local node), the ID information of the sink node (that is, the ID information of the sink node input by the control device), and the content of the optical label is shown in Table 10 below:

Table 10

wavelength source node sink node

Optionally, when the target OTN node is the second target node, the step of receiving the control signaling sent by the control device may specifically include:

Receive the second management and control signaling sent by the control device; wherein, the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path, and the second management and control signaling Carrying wavelength information, input port information and output port information;

According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. The steps can specifically include:

The optical cross-connect is configured according to the input port information and the output port information carried by the second control signaling.

In this embodiment, the second OTN node receives the second management and control signaling sent by the control device, and configures an optical cross-connect corresponding to the wavelength according to the input port and output port carried in the second management and control signaling, thereby establishing The optical layer connection of multiple OTN nodes on the optical layer connection path.

Optionally, as shown in FIG. 7 , an embodiment of the present invention further provides a method for establishing an optical layer connection, which is applied to an OTN node, where the OTN node is a plurality of OTN nodes on the optical layer connection path, except the source node. and intermediate nodes other than the sink node, the method may specifically include:

Step 71: Receive the optical label information sent by the first target node.

Step 72: According to the optical label information and the input port receiving the optical label information, match with the optical cross-connect routing table corresponding to the intermediate node, and determine the output port corresponding to the intermediate node.

Wherein, the optical cross-routing table is used to indicate the output direction from the intermediate node to at least one third OTN node.

Step 73: Configure an optical cross-connect according to the input port and the output port.

Optionally, after receiving the wavelength signal, the intermediate node in the optical layer connection path parses the top-adjusted optical label information from the wavelength signal, and uses the input port of the wavelength signal, the wavelength in the optical label information, and the destination node three. This element is matched with the optical cross-routing table of the intermediate node to obtain a matching output port, so that the optical cross-connect is configured according to the input port and the output port.

In the above solution, the intermediate node configures the optical cross-connect according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, which ensures that the control device can connect to the source node and the sink node in the optical layer connection path to be established. Sending control signaling instead of sending control signaling to other nodes in the optical layer connection path to be established reduces the signaling interaction between the control device and the OTN node, and helps to improve the efficiency of establishing optical layer connections.

As shown in Figure 8, a schematic diagram of interaction between a control device and an OTN node is given.

The control device obtains the device information of each OTN node in the OTN system, and forms a global topology;

The control device configures the optical cross-routing table of each OTN node according to the global topology;

When the service request is input, the control device performs route calculation according to the service request input, and determines the route information of the optical layer connection to be established; The source node and sink node in the path issue management and control signaling, and do not issue management and control signaling to other nodes in the optical layer connection path.

The source node configures the optical cross-connect according to the control signaling issued by the control device, and configures the optical label information by means of wavelength top adjustment and sends it to the intermediate node;

The sink node configures the optical cross-connect according to the control signaling sent by the control device;

The intermediate node reads the optical label information and matches the optical cross routing table according to the optical label information to configure the optical cross connection.

In the above solution, establishing an optical layer connection only requires the control device, the source node and the sink node to exchange management and control signaling, which greatly reduces the exchange of signaling packets between the control device and the OTN node; in addition, the establishment of an optical layer connection to a certain extent It does not depend on the management and control system, as long as the source node and the sink node can interact with the control device. The disconnection of the intermediate node (or intermediate node) does not affect the establishment of optical layer connections, which improves the efficiency of optical layer connection establishment.

As shown in FIG. 9 , an embodiment of the present invention further provides an apparatus 900 for establishing an optical layer connection, which is applied to a target OTN node. The apparatus 900 includes:

a receiving module 910, configured to receive the management and control signaling sent by the control device;

The processing module 920 is configured to, according to the management and control signaling, take the target OTN node as a source node or a sink node in a plurality of OTN nodes on the optical layer connection path, and establish a plurality of OTN nodes on the optical layer connection path optical layer connection.

Optionally, the target OTN node is the first target node;

The receiving module 910 includes:

a first receiving unit, configured to receive the first management and control signaling sent by the control device; wherein, the first management and control signaling is used to indicate that the first target node is the source node on the optical layer connection path, The first control signaling carries wavelength information, input port information, output port information and ID information of the sink node;

The processing module 920 includes:

A first processing unit, configured to configure an optical cross-connect according to the input port information and output port information carried by the first control signaling.

Optionally, the apparatus 900 further includes:

a configuration module, configured to configure optical label information by means of top adjustment; wherein, the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node;

A sending module, configured to send the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, the target OTN node is a second target node;

The receiving module 910 includes:

a first receiving unit, configured to receive the second management and control signaling sent by the control device; wherein the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path, The second control signaling carries wavelength information, input port information and output port information;

The processing module 920 includes:

The second processing unit is configured to configure the optical cross-connect according to the input port information and the output port information carried by the second management and control signaling.

The apparatus 900 in the embodiment of the present invention can implement the various processes of the above-mentioned method for establishing an optical layer connection of a target OTN node, and can achieve the same technical effect. To avoid repetition, details are not described here.

The apparatus 900 in the embodiment of the present invention can ensure that the control device does not send management and control information to other nodes in the optical layer connection path to be established by sending management and control instructions to the source node and the sink node in the optical layer connection path to be established. order, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the efficiency of establishing an optical layer connection.

An embodiment of the present invention also provides an OTN node, where the OTN node is a target OTN node, including: a transceiver and a processor;

The transceiver is used to receive the control signaling sent by the control device;

The processor is configured to, according to the management and control signaling, take the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path, and establish a relationship between the multiple OTN nodes on the optical layer connection path. Optical layer connection.

Optionally, the target OTN node is the first target node;

The transceiver is further configured to: receive a first management and control signaling sent by the control device; wherein the first management and control signaling is used to indicate that the first target node is a source node on the optical layer connection path , the first control signaling carries wavelength information, input port information, output port information and ID information of the sink node;

The processor is further configured to configure the optical cross-connect according to the input port information and the output port information carried by the first control signaling.

Optionally, the processor is further configured to configure optical label information by means of top adjustment; wherein, the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node;

The transceiver is further configured to: send the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, the target OTN node is a second target node;

The transceiver is further configured to: receive the second management and control signaling sent by the control device; wherein, the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path , the second control signaling carries wavelength information, input port information and output port information;

The processor is further configured to configure the optical cross-connect according to the input port information and the output port information carried by the second control signaling.

The OTN node in the embodiment of the present invention can implement each process of the above-mentioned method for establishing an optical layer connection of the target OTN node and can achieve the same technical effect. To avoid repetition, details are not described here.

The OTN node in the embodiment of the present invention can ensure that the control device does not send management and control information to other nodes in the optical layer connection path to be established by sending management and control instructions to the source node and the sink node in the optical layer connection path to be established. order, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the efficiency of establishing an optical layer connection.

As shown in FIG. 10 , an embodiment of the present invention further provides an apparatus 1000 for establishing an optical layer connection, which is applied to an OTN node, where the OTN node is a source node and a sink node among multiple OTN nodes on an optical layer connection path, except for the source node and the sink node. Besides the intermediate nodes, the apparatus 1000 includes:

a receiving module 1010, configured to receive the optical label information sent by the first target node;

The determining module 1020 is configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, and determine the output port corresponding to the intermediate node; The optical cross-routing table is used to indicate the output direction from the intermediate node to at least one third OTN node;

The processing module 1030 is configured to configure an optical cross-connect according to the input port and the output port.

The apparatus 1000 in the embodiment of the present invention can implement each process of the above-mentioned method for establishing an optical layer connection of an OTN node and can achieve the same technical effect. To avoid repetition, details are not described here.

The apparatus 1000 in this embodiment of the present invention configures an optical cross-connect according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, which ensures that the control device can connect to the source node in the optical layer connection path to be established. Send management and control signaling to the sink node instead of sending management and control signaling to other nodes in the optical layer connection path to be established, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the establishment of optical layer connections. s efficiency.

An embodiment of the present invention further provides an OTN node, where the OTN node is an intermediate node other than the source node and the sink node among multiple OTN nodes on an optical layer connection path, including: a transceiver and a processor;

The transceiver is configured to receive the optical label information sent by the first target node;

The processor is configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, determine the output port corresponding to the intermediate node, and determine the output port corresponding to the intermediate node according to the The input port and the output port are configured with an optical cross-connect; wherein, the optical cross-routing table is used to indicate the output direction from the intermediate node to at least one third OTN node.

The OTN node in the embodiment of the present invention can implement each process of the above-mentioned method for establishing an optical layer connection and can achieve the same technical effect. To avoid repetition, details are not described here.

The OTN node in the embodiment of the present invention configures the optical cross-connect according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, which ensures that the control device can connect to the source node in the optical layer connection path to be established. Send management and control signaling to the sink node instead of sending management and control signaling to other nodes in the optical layer connection path to be established, thereby reducing the signaling interaction between the control device and the OTN node, and helping to improve the establishment of optical layer connections. s efficiency.

An OTN node according to another embodiment of the present invention, as shown in FIG. 11 , includes a transceiver 1110, a processor 1100, a memory 1120, and programs or instructions stored on the memory 1120 and executable on the processor 1100; When the processor 1100 executes the program or the instruction, the steps of the above-mentioned method for establishing an optical layer connection can be achieved and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The transceiver 1110 is used to receive and transmit data under the control of the processor 1100 .

11, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 1110 may be a number of elements, including a transmitter and a receiver, that provide means for communicating with various other devices over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

A readable storage medium according to an embodiment of the present invention stores programs or instructions thereon. When the programs or instructions are executed by a processor, the steps of the above-mentioned method for establishing an optical layer connection are implemented, and the same technical effect can be achieved. , in order to avoid repetition, it will not be repeated here.

Wherein, the processor is the processor in the OTN node described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

It should be further noted that many of the functional components described in this specification are referred to as modules in order to more particularly emphasize the independence of their implementations.

In this embodiment of the present invention, the modules may be implemented in software so as to be executed by various types of processors. For example, an identified executable code module may comprise one or more physical or logical blocks of computer instructions, which may be structured as objects, procedures, or functions, for example. Nonetheless, the executable code of the identified module need not be physically located together, but may include different instructions stored in different bits that, when logically combined, constitute the module and implement the specification of the module Purpose.

In practice, an executable code module may be a single instruction or many instructions, and may even be distributed over multiple different code segments, among different programs, and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including over different storage devices), and may exist at least in part only as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module that can be implemented by software, regardless of cost, can build corresponding hardware circuits to implement corresponding functions. The hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays as well as off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

The above-described exemplary embodiments are described with reference to the drawings, many different forms and embodiments are possible without departing from the spirit and teachings of the present invention, and therefore the present invention should not be construed as the exemplary embodiments set forth herein limits. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the invention to those skilled in the art. In the drawings, component sizes and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will be further understood that the terms "comprising" and/or "comprising" when used in this specification denote the presence of stated features, integers, steps, operations, components and/or components, but do not exclude one or more other The presence or addition of features, integers, steps, operations, components, components and/or groups thereof. Unless otherwise indicated, when stated, a range of values includes the upper and lower limits of that range and any subranges therebetween.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (21)

1. An optical layer connection configuration method, applied to a control device, wherein the method comprises: receive business requests; According to the service request, determine the routing information of the optical layer connection to be established; According to the routing information and the optical cross-routing table of the multiple OTN nodes of the optical transport network, send control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established; The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node. 2. The optical layer connection configuration method according to claim 1, wherein the sending control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established comprises: Send the first control signaling to the first target node of the two target OTN nodes for indicating that the first target node is the source node on the optical layer connection path, and send the first control signaling to the two target OTN nodes The second target node in the nodes sends second management and control signaling for indicating that the second target node is the sink node on the optical layer connection path. 3 . The optical layer connection configuration method according to claim 2 , wherein the first control signaling carries wavelength information, input port information, output port information and ID information of the sink node. 4 . 4 . The optical layer connection configuration method according to claim 2 , wherein the second control signaling carries wavelength information, input port information and output port information. 5 . 5 . The optical layer connection configuration method according to claim 1 , wherein, according to the routing information and the optical cross-routing tables of a plurality of optical transport network OTN nodes, the optical layer connection path to be established is multiplied. 6 . Before the two OTN nodes in the OTN nodes send the management and control signaling, it further includes: Obtain the cross-capability information of each OTN node in multiple OTN nodes; According to the cross-connect capability information of each OTN node, the corresponding optical cross-routing table of each OTN node is configured. 6. The optical layer connection configuration method according to claim 5, wherein, according to the cross-connection capability information of each OTN node, configuring the corresponding optical cross-connect routing table of each OTN node, comprising: Traverse the optical cross-connect capability information of the first OTN node, and determine the first routing information from the first OTN node to the adjacent node; wherein, the first OTN node is any one of the multiple OTN nodes; Traverse optical cross-connect capability information of at least one second OTN node, and determine second routing information from the first OTN node to a multi-hop reachable second OTN node; wherein the second OTN nodes are the multiple OTNs OTN nodes other than the first OTN node in the nodes; According to the first routing information and the second routing information, an optical cross-routing table of the first OTN node is established. 7. A method for establishing an optical layer connection, applied to a target OTN node, wherein the method comprises: Receive the control signaling sent by the control device; According to the management and control signaling, the target OTN node is used as the source node or the sink node among the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. 8. The method for establishing an optical layer connection according to claim 7, wherein the target OTN node is the first target node; The control signaling sent by the receiving control device includes: Receive the first management and control signaling sent by the control device; wherein, the first management and control signaling is used to indicate that the first target node is the source node on the optical layer connection path, and the first management and control signaling Carrying wavelength information, input port information, output port information and ID information of the sink node; According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. ,include: The optical cross-connect is configured according to the input port information and the output port information carried by the first control signaling. 9 . The method for establishing an optical layer connection according to claim 8 , wherein after receiving the first control signaling sent by the control device, the method further comprises: 10 . Configure the optical label information by adjusting the top; wherein, the optical label information includes: the ID information of the first target node, the wavelength information and the ID information of the sink node; Sending the optical label information to an intermediate node; wherein, the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes. 10. The method for establishing an optical layer connection according to claim 7, wherein the target OTN node is a second target node; The control signaling sent by the receiving control device includes: Receive the second management and control signaling sent by the control device; wherein, the second management and control signaling is used to indicate that the second target node is the sink node on the optical layer connection path, and the second management and control signaling Carrying wavelength information, input port information and output port information; According to the management and control signaling, the target OTN node is used as the source node or the sink node of the multiple OTN nodes on the optical layer connection path, and the optical layer connection of the multiple OTN nodes on the optical layer connection path is established. ,include: The optical cross-connect is configured according to the input port information and the output port information carried by the second control signaling. 11. A method for establishing an optical layer connection, applied to an OTN node, wherein the OTN node is an intermediate node other than a source node and a sink node among multiple OTN nodes on an optical layer connection path, wherein the Methods include: receiving the optical label information sent by the first target node; According to the optical label information and the input port receiving the optical label information, the optical cross-routing table corresponding to the intermediate node is matched to determine the output port corresponding to the intermediate node; wherein, the optical cross-routing table uses for indicating the output direction of the intermediate node to at least one third OTN node; Optical cross-connects are configured according to the input ports and the output ports. 12. An optical layer connection configuration device, which is applied to a control device, wherein the device comprises: A receiving module for receiving service requests; a determining module, configured to determine the routing information of the optical layer connection to be established according to the service request; a sending module, configured to send management and control signaling to two target OTN nodes in the multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing tables of the multiple OTN nodes; The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node. 13. A control device, comprising: a transceiver and a processor; the transceiver is used for receiving service requests; The processor is used to determine the routing information of the optical layer connection to be established according to the service request; Two target OTN nodes in the multiple OTN nodes on the layer connection path send management and control signaling; The control signaling is used to indicate that one of the two target OTN nodes is the source node on the optical layer connection path and the other one of the two target OTN nodes is the optical layer connection path The sink node on the optical cross-connect routing table is used to indicate the output direction from the first OTN node to at least one second OTN node. 14. A control device, comprising: a transceiver, a processor, a memory, and a program or instruction stored on the memory and executable on the processor; characterized in that the processor executes the program or Steps of implementing the optical layer connection configuration method according to any one of claims 1 to 6 when instructed. 15. A readable storage medium on which programs or instructions are stored, characterized in that, when the programs or instructions are executed by a processor, the optical layer connection configuration method according to any one of claims 1 to 6 is implemented A step of. 16. An apparatus for establishing an optical layer connection, which is applied to a target OTN node, wherein the apparatus comprises: The receiving module is used to receive the control signaling sent by the control device; The processing module is configured to use the target OTN node as a source node or a sink node in the multiple OTN nodes on the optical layer connection path according to the control signaling, and establish the multiple OTN nodes on the optical layer connection path. Optical layer connection. 17. An OTN node, the OTN node is a target OTN node, characterized in that it comprises: a transceiver and a processor; The transceiver is used to receive the control signaling sent by the control device; The processor is configured to, according to the management and control signaling, take the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path, and establish a relationship between the multiple OTN nodes on the optical layer connection path. Optical layer connection. 18. A device for establishing an optical layer connection, applied to an OTN node, the OTN node is an intermediate node other than a source node and a sink node among multiple OTN nodes on an optical layer connection path, wherein the The device includes: a receiving module, configured to receive the optical label information sent by the first target node; a determining module, configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, and determine the output port corresponding to the intermediate node; wherein, the The optical cross-routing table is used to indicate the output direction of the intermediate node to at least one third OTN node; A processing module configured to configure an optical cross-connect according to the input port and the output port. 19. An OTN node, the OTN node is an intermediate node among a plurality of OTN nodes on an optical layer connection path, characterized in that it comprises: a transceiver and a processor; The transceiver is configured to receive the optical label information sent by the first target node; The processor is configured to match the optical cross-routing table corresponding to the intermediate node according to the optical label information and the input port receiving the optical label information, determine the output port corresponding to the intermediate node, and determine the output port corresponding to the intermediate node according to the The input port and the output port are configured with an optical cross-connect; wherein, the optical cross-routing table is used to indicate the output direction from the intermediate node to at least one third OTN node. 20. An OTN node, comprising: a transceiver, a processor, a memory, and a program or instruction stored on the memory and executable on the processor; characterized in that the processor executes the program or When instructed, the steps of the method for establishing an optical layer connection according to any one of claims 7 to 11 are implemented. 21. A readable storage medium on which a program or an instruction is stored, wherein when the program or instruction is executed by a processor, the method for establishing an optical layer connection according to any one of claims 7 to 11 is implemented. step.

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