CN114374896B - Optical layer connection configuration method, optical layer connection establishment method and device - Google Patents

Abstract

The present invention provides an optical layer connection configuration method, an optical layer connection establishment method and device, and relates to the field of communication technology. The method comprises: receiving a service request; determining routing information of the optical layer connection to be established according to the service request; sending control signaling to two target OTN nodes among multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing table of multiple optical transport network OTN nodes; wherein the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a 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 the current method of establishing an optical layer connection has a large amount of signaling interacting between the control device and the OTN node, which affects the efficiency of establishing the optical layer connection.

Description

Optical layer connection configuration method, optical layer connection establishment method and device

Technical Field

The present invention relates to the field of communication technology, and in particular to an optical layer connection configuration method, an optical layer connection establishment method and a device.

Background Art

In an optical transport network (OTN), optical layer connections can be established by a centralized 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 routing calculations based on the input, and based on the routing calculation results, exchanges signals with all OTN nodes in the connection path to configure optical cross-connections and realize the creation and opening of optical layer connections. The current way to establish an optical layer connection requires the control device to interact with each OTN node in the connection path, resulting in more signaling between the control device and the OTN node, which requires higher requirements for the data communication network (DCN, Data Communication Network), and each OTN node in the connection path needs to be configured by the control device, resulting in a high dependence on the control device for the establishment of the optical layer connection. If the control device cannot exchange signals with an OTN node in the connection path, the optical layer connection cannot be established, affecting the efficiency of the optical layer connection establishment.

Summary of the invention

The present invention provides an optical layer connection configuration method, an optical layer connection establishment method and device, so as to solve the problem that the current way of establishing optical layer connection has a lot of signaling interacting between the control device and the OTN node, which affects the efficiency of establishing the optical layer connection.

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;

Determine, according to the service request, routing information of the optical layer connection to be established;

Sending control signaling to two target OTN nodes among 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 optical transport network OTN nodes;

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

Optionally, the sending of control signaling to two target OTN nodes among a plurality of OTN nodes on the optical layer connection path to be established includes:

A first control signaling is sent to a first target node among the two target OTN nodes to indicate that the first target node is a source node on the optical layer connection path, and a second control signaling is sent to a second target node among the two target OTN nodes to indicate that the second target node is a destination node on the optical layer connection path.

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

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

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

Obtain cross-connect capability information of each OTN node among multiple OTN nodes;

According to the cross-connect capability information of each OTN node, an optical cross-connect routing table corresponding to 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:

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

Traversing optical cross-connect capability information of at least one second OTN node, determining second routing information from the first OTN node to a second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

An optical cross-connect routing table of the first OTN node is established according to the first routing information and the second routing information.

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, used for receiving a service request;

A determination module, used to determine the routing information of the optical layer connection to be established according to the service request;

A sending module, configured to send control signaling to two target OTN nodes among 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 optical transport network OTN nodes;

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

Optionally, the sending module includes:

A sending unit is used to send a first control signaling to a first target node among the two target OTN nodes, indicating that the first target node is a source node on the optical layer connection path, and to send a second control signaling to a second target node among the two target OTN nodes, indicating that the second target node is a destination node on the optical layer connection path.

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

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

Optionally, the device further comprises:

An acquisition module, used to acquire cross-connect capability information of each OTN node among multiple OTN nodes;

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

Optionally, the configuration module includes:

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

A second configuration unit is configured to traverse optical cross-connect capability information of at least one second OTN node to determine second routing information from the first OTN node to a second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

The third configuration unit is configured to establish an optical cross-connect 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 to receive a service request;

The processor is used to determine the routing information of the optical layer connection to be established according to the service request; and send control signaling to two target OTN nodes among the multiple OTN nodes on the optical layer connection path to be established through the transceiver according to the routing information and the optical cross-routing table of the multiple optical transport network OTN nodes;

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

Optionally, the processor is also used to: send a first control signaling to a first target node among the two target OTN nodes to indicate that the first target node is a source node on the optical layer connection path, and send a second control signaling to a second target node among the two target OTN nodes to indicate that the second target node is a destination node on the optical layer connection path.

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

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

Optionally, the transceiver is further used to: obtain cross-connect capability information of each OTN node among the multiple OTN nodes;

The processor 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 is further configured to:

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

Traversing optical cross-connect capability information of at least one second OTN node, determining second routing information from the first OTN node to a second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

An optical cross-connect routing table of the first OTN node is established according to the first routing information and the second routing information.

To achieve the above-mentioned purpose, an embodiment of the present invention provides a control device, including: a transceiver, a processor, a memory, and a program or instruction stored in the memory and executable on the processor; when the processor executes the program or instruction, the steps of the optical layer connection configuration method as described above are implemented.

To achieve the above objective, an embodiment of the present invention provides a readable storage medium having a program or instruction stored thereon, and when the program or instruction is executed by a processor, the steps of the optical layer connection configuration method as described above are implemented.

To achieve the above object, 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 includes:

Receive control signaling sent by the control device;

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

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

The receiving control signaling sent by the control device includes:

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

The step of taking the target OTN node as a source node or a sink node among multiple OTN nodes on an optical layer connection path according to the control signaling, and establishing an optical layer connection between multiple OTN nodes on the optical layer connection path includes:

The optical cross-connection 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:

The optical label information is configured 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;

The optical label information is sent 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 control signaling sent by the control device includes:

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

The step of taking the target OTN node as a source node or a sink node among multiple OTN nodes on an optical layer connection path according to the control signaling, and establishing an optical layer connection between multiple OTN nodes on the optical layer connection path includes:

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

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:

A receiving module, used to receive control signaling sent by a control device;

The processing module is used to establish an optical layer connection of the multiple OTN nodes on the optical layer connection path based on the control signaling, taking the target OTN node as the source node or the sink node among the multiple OTN nodes on the optical layer connection path.

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

The receiving module comprises:

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

The processing module comprises:

The first processing unit is configured to configure an optical cross-connection according to the input port information and the output port information carried by the first control signaling.

Optionally, the device further comprises:

A configuration module, configured to 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;

The sending module is used 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 comprises:

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

The processing module comprises:

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

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

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

The processor is used to establish an optical layer connection of the multiple OTN nodes on the optical layer connection path, using the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path according to the control signaling.

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

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

The processor is further configured to: configure an optical cross-connection 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 adjusting the top; 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 used for: 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 transceiver is also used to: receive a second control signaling sent by the control device; wherein the second control signaling is used to indicate that the second target node is a sink node on the optical layer connection path, and the second control signaling carries wavelength information, input port information, and output port information;

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

To achieve the above object, an embodiment of the present invention further provides a method for establishing an optical layer connection, which is 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, and the method includes:

Receiving optical label information sent by the first target node;

According to the optical label information and the input port receiving the optical label information, matching with the optical cross-routing table corresponding to the intermediate node, determining the output port corresponding to the intermediate node; wherein the optical cross-routing table is used to indicate the output direction of the intermediate node to at least one third OTN node;

An optical cross-connect is configured according to the input port and the output port.

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 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. The device includes:

A receiving module, used for receiving the optical label information sent by the first target node;

A determination module, configured to match the optical label information and the input port for receiving the optical label information with the optical cross-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 of the intermediate node to at least one third OTN node;

The processing module is used to configure an optical cross-connection according to the input port and the output port.

To achieve the above object, an embodiment of the present invention further provides an OTN node, which is an intermediate node other than a source node and a sink node among multiple OTN nodes on an optical layer connection path, and includes: a transceiver and a processor;

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

The processor is used to match the optical cross-connection table corresponding to the intermediate node according to the optical label information and the input port for receiving the optical label information, determine the output port corresponding to the intermediate node, and configure the optical cross-connection according to the input port and the output port; wherein the optical cross-connection table is used to indicate the output direction of the intermediate node to at least one third OTN node.

To achieve the above-mentioned purpose, an embodiment of the present invention also provides an OTN node, comprising: a transceiver, a processor, a memory, and a program or instruction stored in the memory and executable on the processor; when the processor executes the program or instruction, the steps of the method for establishing an optical layer connection as described above are implemented.

To achieve the above objectives, an embodiment of the present invention further provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method for establishing an optical layer connection as described above are implemented.

The beneficial effects of the above technical solution of the present invention are as follows:

In an embodiment of the present invention, when a service request is received, a routing 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 calculated, combined with the optical cross-routing table of each OTN node, control signaling is sent to the source node and the destination node in the optical layer connection path to be established, and control signaling is not sent 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 is conducive to improving the efficiency of establishing the optical layer connection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the interaction between a control device and an OTN node;

2 is a flow chart of a method for configuring an optical layer connection according to an embodiment of the present invention;

FIG3 is a block diagram of an optical layer connection configuration device according to an embodiment of the present invention;

FIG4 is a block diagram of a control device according to an embodiment of the present invention;

FIG5 is a structural diagram of a control device according to an embodiment of the present invention;

FIG6 is a flowchart of a method for establishing an optical layer connection according to an embodiment of the present invention;

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

FIG8 is a schematic diagram of interaction between a control device and an OTN node according to an embodiment of the present invention;

FIG9 is a block diagram of a device for establishing an optical layer connection according to an embodiment of the present invention;

FIG10 is a second block diagram of the device 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 DESCRIPTION

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific 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 sequence numbers of the following processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

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

In the embodiments provided in the present 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 determining B only according to A, and B can also be determined according to A and/or other information.

Optionally, an embodiment of the present invention provides an OTN system, which may include a control device and multiple OTN nodes. The control device and the OTN nodes may interact through management and control signaling, and the OTN nodes may interact through optical label information to achieve optical cross-connection.

As shown in FIG. 2 , an optical layer connection configuration method 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: Sending control signaling to two target OTN nodes among 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 optical transport network OTN nodes.

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

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 an output direction from a first OTN node to at least one second OTN node, which may be understood as the optical cross-routing table for the first OTN node being used to indicate an output direction (or output port) from the first OTN node to at least one second OTN node; wherein the second OTN node may be a host node on an optical layer connection path, or may be an intermediate node on the optical layer connection path.

Optionally, the optical cross-link 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 being reachable from the first OTN node to the second OTN node. For example, whether the first OTN node is reachable from the second OTN node may be determined by the control device during the routing calculation process based on factors such as transmission distance and loss.

Optionally, the control device can calculate the optical layer connection route and wavelength to be established based on the OTN node topology information and user input information (such as source/destination node, port, 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, when a service request is received, a routing 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 calculated, combined with the optical cross-routing table of each OTN node, control signaling is sent to the source node and the destination node in the optical layer connection path to be established, and control signaling is not sent 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 is conducive to improving the efficiency of establishing the optical layer connection.

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

A first control signaling is sent to a first target node among the two target OTN nodes to indicate that the first target node is a source node on the optical layer connection path, and a second control signaling is sent to a second target node among the two target OTN nodes to indicate that the second target node is a destination 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 of routing calculation, and thus can directly send the first control signaling to the first target node and send the second control signaling to the second target node, so that multiple OTN nodes on the optical layer connection path to be established are configured with optical cross-connections and can ensure that multiple OTN nodes on the optical layer connection path are physically reachable.

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

In this embodiment, the control device sends a first control signaling to the first target node, so that the first target node can configure the optical cross-connection corresponding to the wavelength according to the input port and the output port carried in the first control signaling, and the control device sends a second control signaling to the second target node, so that the second target node can configure the optical cross-connection corresponding to the wavelength according to the input port and the output port carried in the second control signaling; and the first target node can 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 an optical layer connection of multiple OTN nodes on the optical layer connection path, and reducing the signaling interaction between the control device and the OTN node; wherein the intermediate node is an OTN node other than the source node and the sink node among the multiple OTN nodes.

Optionally, before the step of sending control signaling to two OTN nodes among multiple OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross-routing table of multiple optical transport network OTN nodes, the method may further specifically include:

Obtain cross-connect capability information of each OTN node among multiple OTN nodes;

According to the cross-connect capability information of each OTN node, an optical cross-connect routing table corresponding to 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 interacts with each OTN node through control signaling, and automatically obtains (or manually configures) device information through the control interface to form the following data structure: network element information (Ne), port information (Port), and cross capability (CrossAbility).

The network element information is shown in Table 1 below:

Table 1

The port information is shown in Table 2 below:

Table 2

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

Table 3

Fields type Port1id String Port2id String wavelength String

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

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

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

Traversing optical cross-connect capability information of at least one second OTN node, determining second routing information from the first OTN node to a second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

An optical cross-connect routing table of the first OTN node is established according to the first routing information and the second routing information.

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

Table 4

wavelength Input Port Sink Node Output Direction

The following describes how to configure the optical cross-connect routing table corresponding to the OTN node with a specific example:

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

Table 5

Fields Value Port1id A.a.id Port2id A.b.id wavelength λ

The configuration method of the optical cross-connect routing table for the adjacent node is: traverse the cross-connect capability table of OTN node A, and organize two routes for each piece of information. For example, two pieces of information are added to the optical cross-connect routing table of 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 directly adjacent nodes in the optical cross-connect routing table, the control device also needs to add the routing information of the destination node reachable via multiple hops in the optical cross-connect routing table.

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-connect 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, 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 repeatedly iterate in a similar manner until the configuration of the optical cross-connect routing table of all OTN nodes is completed. It should be noted that the configuration of the optical cross-connect routing table of each OTN node by the control device belongs to the initialization stage. After the configuration of the optical cross-connect routing table on each OTN node is completed, if the physical device or connection remains unchanged, the optical cross-connect routing table does not need to be changed, thereby ensuring the efficiency of establishing the optical layer connection when the service request arrives.

As shown in FIG3 , an embodiment of the present invention provides an optical layer connection configuration device 300, which is applied to a control device. The device 300 includes:

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

A determination module 320, configured to determine routing information of an optical layer connection to be established according to the service request;

The sending module 330 is used to send control signaling to two target OTN nodes among 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 optical transport network OTN nodes;

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

Optionally, the sending module 330 includes:

A sending unit is used to send a first control signaling to a first target node among the two target OTN nodes, indicating that the first target node is a source node on the optical layer connection path, and to send a second control signaling to a second target node among the two target OTN nodes, indicating that the second target node is a destination node on the optical layer connection path.

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

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

Optionally, the device 300 further includes:

An acquisition module, used to acquire cross-connect capability information of each OTN node among multiple OTN nodes;

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

Optionally, the configuration module includes:

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

A second configuration unit is configured to 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 second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

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

The device in the embodiment of the present invention can implement the processes of each embodiment of the above-mentioned optical layer connection configuration method and achieve the same technical effect. To avoid repetition, it will not be described here.

The device 300 in the embodiment of the present invention, when 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 when the routing information of the optical layer connection to be established is calculated, combines the optical cross-routing table of each OTN node to send control signaling to the source node and the destination node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing the optical layer connection.

As shown in FIG4 , 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 to receive a service request;

The processor 410 is used to determine the routing information of the optical layer connection to be established according to the service request; and send control signaling to two target OTN nodes among the multiple OTN nodes on the optical layer connection path to be established through the transceiver 420 according to the routing information and the optical cross-routing table of the multiple optical transport network OTN nodes;

Among them, the control signaling is used to indicate that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a destination 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.

Optionally, the processor 410 is also used to: send a first control signaling to a first target node among the two target OTN nodes to indicate that the first target node is a source node on the optical layer connection path, and send a second control signaling to a second target node among the two target OTN nodes to indicate that the second target node is a destination node on the optical layer connection path.

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

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

Optionally, the transceiver 420 is further configured to: obtain cross-connect capability information of each OTN node among 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:

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

Traversing optical cross-connect capability information of at least one second OTN node, determining second routing information from the first OTN node to a second OTN node reachable by multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the multiple OTN nodes;

An optical cross-connect routing table of the first OTN node is established according to the first routing information and the second routing information.

The control device 400 in the embodiment of the present invention can implement the processes of each embodiment of the above-mentioned optical layer connection configuration method and achieve the same technical effect. To avoid repetition, it will not be repeated here.

The control device 400 in the embodiment of the present invention, when 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 after calculating the routing information of the optical layer connection to be established, combines the optical cross-routing table of each OTN node to send control signaling to the source node and the destination node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing the optical layer connection.

A control device according to another embodiment of the present invention, as shown in Figure 5, includes a transceiver 510, a processor 500, a memory 520, and a program or instruction stored in the memory 520 and executable on the processor 500; 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, it will not be repeated here.

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

In FIG. 5 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by processor 500 and 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 are therefore not further described herein. The bus interface provides an interface. The transceiver 510 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium.

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

A readable storage medium of an embodiment of the present invention stores a program or instruction thereon. When the program or instruction is executed by a processor, the steps in the optical layer connection configuration method as described above are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the control device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

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 control signaling sent by the control device.

Step 62: according to the control signaling, the target OTN node is used as a source node or a sink node among multiple OTN nodes on the optical layer connection path, and an optical layer connection of multiple OTN nodes on the optical layer connection path is established.

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 a source node in the optical layer connection path, and the second target node can be used as a sink node in the optical layer connection path. In this way, the control device sends control instructions to the source node and sink node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing the optical layer connection.

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

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

The step of taking the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path and establishing an optical layer connection of multiple OTN nodes on the optical layer connection path according to the control signaling may specifically include:

The optical cross-connection 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:

The optical label information is configured by adjusting the top; wherein the optical label information includes: ID information of the first target node, wavelength information and ID information of the sink node; the optical label information is sent to an intermediate node; wherein the intermediate node is an OTN node among the multiple OTN nodes except the source node and the sink node.

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

For example, the source node can configure the optical label information on the wavelength of the corresponding port by adjusting the top. The optical label information may include wavelength information (the wavelength information is the wavelength information input by the control device), the ID information of the source node (that is, the ID information of the local node), and the ID information of the sink node (that is, the ID information of the sink node input by the control device). 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 a second target node, the step of receiving the control signaling sent by the control device may specifically include:

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

The step of taking the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path and establishing an optical layer connection of multiple OTN nodes on the optical layer connection path according to the control signaling may specifically include:

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

Optionally, as shown in FIG7 , an embodiment of the present invention further provides a method for establishing an optical layer connection, which is 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. The method may specifically include:

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

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

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

Step 73: Configure an optical cross-connection 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 optical label information from the wavelength signal, and matches it with the optical cross-routing table of the intermediate node based on the three elements of the input port of the wavelength signal, the wavelength in the optical label information, and the host node, to obtain a matching output port, thereby configuring the optical cross-connection based on the input port and the output port.

In the above scheme, the intermediate node configures the optical cross-connection according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, ensuring that the control device can send control signaling to the source node and the destination node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing optical layer connections.

As shown in FIG8 , a schematic diagram of interaction between a control device and an OTN node is provided.

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-connect routing table of each OTN node according to the global topology;

When a service request is input, the control device performs routing calculations based on the service request input to determine the routing information of the optical layer connection to be established; and based on the routing information and the optical cross-routing table of each OTN node, sends control signaling to the source node and destination node in the optical layer connection path to be established, and does not send control signaling to other nodes in the optical layer connection path.

The source node configures the optical cross-connection according to the control signaling sent by the control device, and configures the optical label information by wavelength tuning and sends it to the intermediate node;

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

The intermediate node reads the optical label information, matches the optical label information with the optical cross-routing table, and configures the optical cross-connection.

In the above scheme, establishing an optical layer connection only requires the control device and the source node and the sink node to exchange management and control signaling, which greatly reduces the signaling message interaction between the control device and the OTN node; in addition, the establishment of the optical layer connection does not depend on the management and control system to a certain extent, and only requires the source node and the sink node to be able to interact with the control device. The disconnection of the intermediate node (or intermediate node) does not affect the establishment of the optical layer connection, thereby improving the efficiency of establishing the optical layer connection.

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

The receiving module 910 is used to receive the control signaling sent by the control device;

The processing module 920 is used to establish an optical layer connection among the multiple OTN nodes on the optical layer connection path based on the control signaling, taking the target OTN node as the source node or the sink node among the multiple OTN nodes on the optical layer connection path.

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

The receiving module 910 includes:

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

The processing module 920 includes:

The first processing unit is configured to configure an optical cross-connection according to the input port information and the output port information carried by the first control signaling.

Optionally, the device 900 further includes:

A configuration module, configured to 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;

The sending module is used 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 a second control signaling sent by the control device; wherein the second control signaling is used to indicate that the second target node is a sink node on the optical layer connection path, and 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-connection according to the input port information and the output port information carried by the second control signaling.

The device 900 in the embodiment of the present invention can implement each process of the method for establishing an optical layer connection of the target OTN node and can achieve the same technical effect. To avoid repetition, it will not be described again here.

The device 900 in the embodiment of the present invention can ensure that the control device sends control instructions to the source node and the destination 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 signaling interaction between the control device and the OTN node, and is conducive to improving the efficiency of establishing optical layer connections.

An embodiment of the present invention further provides an OTN node, which is a target OTN node and includes: a transceiver and a processor;

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

The processor is used to establish an optical layer connection of the multiple OTN nodes on the optical layer connection path, using the target OTN node as a source node or a sink node among multiple OTN nodes on the optical layer connection path according to the control signaling.

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

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

The processor is further configured to: configure an optical cross-connection 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 adjusting the top; 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 used for: 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 transceiver is also used to: receive a second control signaling sent by the control device; wherein the second control signaling is used to indicate that the second target node is a sink node on the optical layer connection path, and the second control signaling carries wavelength information, input port information, and output port information;

The processor is further configured to: configure an optical cross-connection 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 method for establishing an optical layer connection of the target OTN node and can achieve the same technical effect. To avoid repetition, it will not be described again here.

The OTN node in the embodiment of the present invention can ensure that the control device sends control instructions to the source node and the destination 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 signaling interaction between the control device and the OTN node, and is conducive to improving the efficiency of establishing optical layer connections.

As shown in FIG10 , an embodiment of the present invention further provides a device 1000 for establishing an optical layer connection, which is 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. The device 1000 includes:

Receiving module 1010, used to receive the optical label information sent by the first target node;

The determination module 1020 is used to match the optical label information and the input port receiving the optical label information with the optical cross-routing table corresponding to the intermediate node to determine the output port corresponding to the intermediate node; wherein the optical cross-routing table is used to indicate the output direction of the intermediate node to at least one third OTN node;

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

The device 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, it will not be described again here.

The device 1000 in the embodiment of the present invention configures the optical cross-connection according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, thereby ensuring that the control device can send control signaling to the source node and the destination node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing optical layer connections.

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

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

The processor is used to match the optical cross-connection table corresponding to the intermediate node according to the optical label information and the input port for receiving the optical label information, determine the output port corresponding to the intermediate node, and configure the optical cross-connection according to the input port and the output port; wherein the optical cross-connection table is used to indicate the output direction of 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, it will not be described here.

The OTN node in the embodiment of the present invention configures the optical cross-connection according to the optical label information sent by the source node and the optical cross-routing table configured by the control device, thereby ensuring that the control device can send control signaling to the source node and the destination node in the optical layer connection path to be established, but does not send 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 is conducive to improving the efficiency of establishing the optical layer connection.

An OTN node according to another embodiment of the present invention, as shown in FIG11 , includes a transceiver 1110, a processor 1100, a memory 1120, and a program or instruction stored in the memory 1120 and executable on the processor 1100; when the processor 1100 executes the program or instruction, the steps of the above-mentioned method for establishing an optical layer connection are implemented and the same technical effect can be achieved. To avoid repetition, they are not described again here.

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

Among them, in Figure 11, the bus architecture can 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 can also link various other circuits such as peripherals, regulators, and power management circuits together, which are all well known in the art, so they are not further described herein. The bus interface provides an interface. The transceiver 1110 can be a plurality of components, that is, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.

A readable storage medium according to an embodiment of the present invention stores a program or instruction thereon. When the program or instruction is executed by a processor, the steps of the method for establishing an optical layer connection as described above are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the OTN node described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

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

In the embodiment of the present invention, module can be implemented with software so that it can be executed by various types of processors. For example, an executable code module of an identification can include one or more physical or logical blocks of computer instructions, for example, it can be constructed as an object, process or function. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different positions, and when these instructions are logically combined together, it constitutes a module and realizes the specified purpose of the module.

In fact, executable code module can be a single instruction or many instructions, and can even be distributed on a plurality of different code segments, distributed among different programs, and distributed across a plurality of memory devices. Similarly, operating data can be identified in the module, and can be implemented and organized in the data structure of any appropriate type according to any appropriate form. The operating data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and can only be present on a system or network as an electronic signal at least in part.

When a module can be implemented by software, considering the level of existing hardware technology, a person skilled in the art can build a corresponding hardware circuit to implement the corresponding function of the module that can be implemented by software without considering the cost. The hardware circuit includes a conventional very large scale integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors, or other discrete components. The module can also be implemented by a programmable hardware device, such as a field programmable gate array, a programmable array logic, a programmable logic device, etc.

The above exemplary embodiments are described with reference to the accompanying drawings, and many different forms and embodiments are feasible without departing from the spirit and teachings of the present invention. Therefore, the present invention should not be constructed as a limitation of the exemplary embodiments proposed herein. More specifically, these exemplary embodiments are provided so that the present invention will be perfect and complete, and the scope of the present invention will be conveyed to those who are familiar with the technology. In these figures, the component sizes and relative sizes may be exaggerated for clarity. The terms used here are only based on the purpose of describing specific exemplary embodiments and are not intended to be limiting. As used herein, unless the text clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to include these multiple forms. It will be further understood that the terms "including" and/or "comprising" when used in this specification indicate the presence of the features, integers, steps, operations, components and/or components, but do not exclude the presence or increase of one or more other features, integers, steps, operations, components, components and/or their groups. Unless otherwise indicated, when stated, a range of values includes the upper and lower limits of that range and any subranges therebetween.

The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (21)

1. An optical layer connection configuration method applied to a control device, the method comprising:

receiving a service request;

determining the route information of the optical layer connection to be established according to the service request;

According to the routing information and the optical cross routing table of each OTN node in the plurality of OTN nodes, sending a management and control signaling to two target OTN nodes in the plurality of OTN nodes on an optical layer connection path to be established, and not sending the management and control signaling to other nodes except the target OTN nodes in the plurality of OTN nodes on the optical layer connection path;

the management and control signaling is used for indicating that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a sink node on the optical layer connection path; the optical cross routing table of any first OTN node is used to indicate the output direction from the first OTN node to at least one second OTN node.

2. The method for configuring optical layer connection according to claim 1, wherein the sending management and control signaling to two target OTN nodes of the plurality of OTN nodes on the optical layer connection path to be established includes:

and sending a first control signaling for indicating the first target node to be a source node on the optical layer connection path to a first target node in the two target OTN nodes, and sending a second control signaling for indicating the second target node to be a sink node on the optical layer connection path to a second target node in the two target OTN nodes.

3. The optical layer connection configuration method according to claim 2, wherein the first management and control signaling carries wavelength information, input port information, output port information, and ID information of a sink node.

4. The method according to claim 2, wherein the second control signaling carries wavelength information, input port information, and output port information.

5. The method according to claim 1, wherein before sending the management and control signaling to two OTN nodes in the plurality of OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross routing table of each OTN node in the plurality of OTN nodes of the optical transport network, the method further comprises:

acquiring cross capability information of each OTN node in a plurality of OTN nodes;

And configuring an optical cross routing table corresponding to each OTN node according to the cross capability information of each OTN node.

6. The method for configuring optical layer connection according to claim 5, wherein configuring the optical cross routing table corresponding to each OTN node according to the cross capability information of each OTN node comprises:

traversing optical cross capability information of a first OTN node, and determining first route information from the first OTN node to an adjacent node; wherein the first OTN node is any one of the plurality of OTN nodes;

Traversing optical cross capability information of at least one second OTN node, and determining second routing information from the first OTN node to a second OTN node which is reachable in multiple hops; wherein the second OTN node is an OTN node other than the first OTN node among the plurality of OTN nodes;

And establishing an optical cross routing table of the first OTN node according to the first routing information and the second routing information.

7. A method for establishing an optical layer connection, applied to a target OTN node, the method comprising:

Receiving a management and control signaling sent by control equipment; the control signaling is sent by the control device according to the routing information of the optical layer connection to be established and an optical cross routing table of each of the plurality of OTN nodes, and the control device does not send the control signaling to other nodes except the target OTN node in the plurality of OTN nodes on the optical layer connection path; the control signaling is used for indicating the target OTN node to be a source node or a destination node on the optical layer connection path; the optical cross routing table of any first OTN node is used for indicating the output direction from the first OTN node to at least one second OTN node;

and according to the control signaling, taking the target OTN node as a source node or a destination node in a plurality of OTN nodes on an optical layer connection path, and establishing optical layer connection of the plurality of OTN nodes on the optical layer connection path.

8. The method for establishing an optical layer connection according to claim 7, wherein the target OTN node is a first target node;

The receiving the control signaling sent by the control device includes:

receiving a first control signaling sent by the control equipment; the first control signaling is used for indicating the first target node to be a source node on the optical layer connection path, and the first control signaling carries wavelength information, input port information, output port information and ID information of a sink node;

according to the management and control signaling, the target OTN node is used as a source node or a sink node of a plurality of OTN nodes on an optical layer connection path, and an optical layer connection of the plurality of OTN nodes on the optical layer connection path is established, including:

and configuring optical cross connection 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, further comprising, after receiving the first management and control signaling sent by the control device:

Configuring optical label information in a top adjustment mode; wherein the optical label information includes: the ID information, the wavelength information and the ID information of the sink node of the first target node;

Transmitting the optical label information to an intermediate node; the intermediate node is an OTN node of the plurality of OTN nodes except the source node and the sink node.

10. The method for establishing an optical layer connection according to claim 7, wherein the target OTN node is a second target node;

The receiving the control signaling sent by the control device includes:

Receiving a second control signaling sent by the control equipment; the second control signaling is used for indicating the second target node to be a sink node on the optical layer connection path, and the second control signaling carries wavelength information, input port information and output port information;

according to the management and control signaling, the target OTN node is used as a source node or a sink node of a plurality of OTN nodes on an optical layer connection path, and an optical layer connection of the plurality of OTN nodes on the optical layer connection path is established, including:

and configuring optical cross connection according to the input port information and the output port information carried by the second control signaling.

11. The method for establishing the optical layer connection is applied to an OTN node, wherein the OTN node is an intermediate node except a source node and a destination node in a plurality of OTN nodes on an optical layer connection path, and is characterized by comprising the following steps:

receiving optical label information sent by a first target node; the optical label information is sent by the first target node after receiving a management and control signaling sent by control equipment, the control equipment does not send the management and control signaling to the intermediate node, and the management and control signaling is used for indicating that the first target node is a source node or a sink node on an optical layer connection path; the optical label information includes: the ID information, the wavelength information and the ID information of the sink node of the first target node; the wavelength information is used for indicating the wavelength of the optical cross-connect to be established;

According to the optical label information and the input port for receiving the optical label information, matching with an optical cross routing table corresponding to the intermediate node, and determining an output port corresponding to the intermediate node; the optical cross routing table is used for indicating the output direction from the intermediate node to at least one third OTN node;

and configuring the optical cross connection of the wavelength according to the input port and the output port.

12. An optical layer connection configuration apparatus for use in a control device, the apparatus comprising:

The receiving module is used for receiving the service request;

the determining module is used for determining the route information of the optical layer connection to be established according to the service request;

A sending module, configured to send a management and control signaling to two target OTN nodes in a plurality of OTN nodes on an optical layer connection path to be established according to the routing information and an optical cross routing table of each OTN node in the plurality of OTN nodes, and not send the management and control signaling to other nodes except the target OTN nodes in the plurality of OTN nodes on the optical layer connection path;

the management and control signaling is used for indicating that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a sink node on the optical layer connection path; the optical cross routing table of any first OTN node is used to indicate the output direction from the first OTN node to at least one second OTN node.

13. A control apparatus, characterized by comprising: a transceiver and a processor;

the transceiver is used for receiving a service request;

The processor is used for determining the route information of the optical layer connection to be established according to the service request; according to the routing information and the optical cross routing table of each OTN node in the plurality of OTN nodes, sending a management and control signaling to two target OTN nodes in the plurality of OTN nodes on an optical layer connection path to be established through a transceiver, and not sending the management and control signaling to other nodes except the target OTN nodes in the plurality of OTN nodes on the optical layer connection path;

the management and control signaling is used for indicating that one of the two target OTN nodes is a source node on the optical layer connection path and the other of the two target OTN nodes is a sink node on the optical layer connection path; the optical cross routing table of any first OTN node is used to indicate the output direction from the first OTN node to at least one second OTN node.

14. A control apparatus comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the method is characterized in that the steps of the optical layer connection configuration method according to any one of claims 1 to 6 are realized when the processor executes the program or the instructions.

15. A readable storage medium having stored thereon a program or instructions, which when executed by a processor, implement the steps of the optical layer connection configuration method according to any one of claims 1 to 6.

16. An optical layer connection establishment device applied to a target OTN node, the device comprising:

The receiving module is used for receiving the control signaling sent by the control equipment; the control signaling is sent by the control device according to the routing information of the optical layer connection to be established and an optical cross routing table of each of the plurality of OTN nodes, and the control device does not send the control signaling to other nodes except the target OTN node in the plurality of OTN nodes on the optical layer connection path; the control signaling is used for indicating the target OTN node to be a source node or a destination node on the optical layer connection path; the optical cross routing table of any first OTN node is used for indicating the output direction from the first OTN node to at least one second OTN node;

And the processing module is used for taking the target OTN node as a source node or a destination node in a plurality of OTN nodes on an optical layer connection path according to the control signaling, and establishing optical layer connection of the plurality of OTN nodes on the optical layer connection path.

17. An OTN node, the OTN node being a target OTN node, comprising: a transceiver and a processor;

the transceiver is used for receiving the control signaling sent by the control equipment; the control signaling is sent by the control device according to the routing information of the optical layer connection to be established and an optical cross routing table of each of the plurality of OTN nodes, and the control device does not send the control signaling to other nodes except the target OTN node in the plurality of OTN nodes on the optical layer connection path; the control signaling is used for indicating the target OTN node to be a source node or a destination node on the optical layer connection path; the optical cross routing table of any first OTN node is used for indicating the output direction from the first OTN node to at least one second OTN node;

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

18. An apparatus for establishing an optical layer connection, applied to an OTN node, where the OTN node is an intermediate node except a source node and a sink node among a plurality of OTN nodes on an optical layer connection path, the apparatus comprising:

The receiving module is used for receiving the optical label information sent by the first target node; the optical label information is sent by the first target node after receiving a management and control signaling sent by control equipment, the control equipment does not send the management and control signaling to the intermediate node, and the management and control signaling is used for indicating that the first target node is a source node or a sink node on an optical layer connection path; the optical label information includes: the ID information, the wavelength information and the ID information of the sink node of the first target node; the wavelength information is used for indicating the wavelength of the optical cross-connect to be established;

The determining module is used for matching the optical cross routing table corresponding to the intermediate node according to the optical label information and the input port for receiving the optical label information, and determining the output port corresponding to the intermediate node; the optical cross routing table is used for indicating the output direction from the intermediate node to at least one third OTN node;

and the processing module is used for configuring the optical cross connection of the wavelength according to the input port and the output port.

19. An OTN node, the OTN node being an intermediate node among a plurality of OTN nodes on an optical layer connection path, comprising: a transceiver and a processor;

The transceiver is used for receiving the optical label information sent by the first target node; the optical label information is sent by the first target node after receiving a management and control signaling sent by control equipment, the control equipment does not send the management and control signaling to the intermediate node, and the management and control signaling is used for indicating that the first target node is a source node or a sink node on an optical layer connection path; the optical label information includes: the ID information, the wavelength information and the ID information of the sink node of the first target node; the wavelength information is used for indicating the wavelength of the optical cross-connect to be established;

The processor is used for matching with the optical cross routing table corresponding to the intermediate node according to the optical label information and the input port for receiving the optical label information, determining the output port corresponding to the intermediate node, and configuring the optical cross connection of the wavelength according to the input port and the output port; the optical cross routing table is used for indicating 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 instructions stored on the memory and executable on the processor; the method for establishing an optical layer connection according to any one of claims 7 to 11 is characterized in that the processor executes the program or instructions.

21. A readable storage medium having stored thereon a program or instructions which when executed by a processor performs the steps of the method for establishing an optical layer connection according to any of claims 7 to 11.