CN114374896A

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

Info

Publication number: CN114374896A
Application number: CN202011096090.0A
Authority: CN
Inventors: 赵阳; 李允博; 张德朝; 王东; 孙将
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2022-04-19

Abstract

The invention provides an optical layer connection configuration method, an optical layer connection establishing method and an optical layer connection establishing device, and relates to the technical field of communication. The method comprises the following steps: receiving a service request; determining routing information of optical layer connection to be established according to the service request; according to the routing information and the optical cross routing tables of the plurality of optical transport network OTN nodes, sending control signaling to two target OTN nodes in the plurality of OTN nodes on the optical layer connection path to be established; the management and control signaling is used for indicating one of the two target OTN nodes as a source node on an optical layer connection path and the other one of the two target OTN nodes as a destination node on the optical layer connection path; the optical cross-routing table is used to indicate an output direction from the first OTN node to the at least one second OTN node. The scheme of the invention solves the problem that the existing optical layer connection establishing mode has more interactive signaling between the control equipment and the OTN node and influences the optical layer connection establishing efficiency.

Description

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

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an optical layer connection configuration method, an optical layer connection establishment method, and an optical layer connection establishment apparatus.

Background

In Optical Transport Networks (OTNs), optical layer connections may be established under control of a centralized Software Defined Network (SDN) control device. As shown in fig. 1, the current way to establish optical layer connections is: the method comprises the steps that control equipment obtains resource information of all OTN nodes in an OTN network to form a global topology; when a service request is input, the control equipment carries out route calculation according to the input, and interacts signaling with all OTN nodes in a connection path based on a route calculation result to configure optical cross connection, so that establishment and opening of optical layer connection are realized. At present, an optical layer connection establishing mode needs a control device to interact with each OTN node of a connection path, resulting in more signaling exchanged between the control device and the OTN node, which needs to improve a requirement for a Data Communication Network (DCN), and each OTN node of the connection path needs to be configured by the control device, resulting in higher dependence of optical layer connection establishing on the control device, and if the control device and one OTN node of the connection path cannot interact with signaling, resulting in that optical layer connection cannot be established, which affects efficiency of optical layer connection establishing.

Disclosure of Invention

The invention provides an optical layer connection configuration method, an optical layer connection establishment method and an optical layer connection establishment device, which are used for solving the problems that the existing optical layer connection establishment mode has more interactive signaling between control equipment and an OTN node and influences the optical layer connection establishment efficiency.

To achieve the above object, an embodiment of the present invention provides an optical layer connection configuration method, applied to a control device, the method including:

receiving a service request;

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

according to the routing information and the optical cross routing tables of the plurality of optical transport network OTN nodes, sending control signaling to two target OTN nodes in the plurality of OTN nodes on the optical layer connection path to be established;

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

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

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

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

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

Optionally, before sending the management and control signaling to two OTN nodes of 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 the plurality of OTN nodes, the method further includes:

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.

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

traversing optical cross capability information of a 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 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 multi-hop reachable second OTN node; wherein the second OTN node is an OTN node of the plurality of OTN nodes except the first OTN node;

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

To achieve the above object, an embodiment of the present invention provides an optical layer connection configuration apparatus applied to a control device, the apparatus including:

the receiving module is used for receiving the service request;

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

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

Optionally, the sending module includes:

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

Optionally, the apparatus further comprises:

the acquiring module is used for acquiring the cross capability information of each OTN node in the plurality of OTN nodes;

and the configuration module is used for configuring the optical cross routing table corresponding to each OTN node according to the cross capability information of each OTN node.

Optionally, the configuration module includes:

the first configuration unit is configured to traverse optical cross 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 plurality of OTN nodes;

a second configuration unit, configured to traverse optical cross capability information of at least one second OTN node, and determine second routing information from the first OTN node to a second OTN node that is reachable by multiple hops; wherein the second OTN node is an OTN node of the plurality of OTN nodes except the first OTN node;

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

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

the transceiver is used for receiving a service request;

the processor is used for determining routing information of the optical layer connection to be established according to the service request; sending a control signaling to two target OTN nodes in the plurality of OTN nodes on the optical layer connection path to be established through the transceiver according to the routing information and the optical cross routing tables of the plurality of OTN nodes;

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

Optionally, the transceiver is further configured to: acquiring cross capability information of each OTN node in a plurality of OTN nodes;

the processor is further configured to: and configuring an optical cross routing table corresponding to each OTN node according to the cross capability information of each OTN node.

Optionally, the processor is further configured to:

To achieve the above object, an embodiment of the present invention provides a control apparatus including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the processor, when executing the program or instructions, implements the steps of the optical layer connection configuration method described above.

To achieve the above object, an embodiment of the present invention provides a readable storage medium on which a program or instructions are stored, which when executed by a processor implement the steps of the optical layer connection configuration method as described above.

In order 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, and the method includes:

receiving a control signaling sent by control equipment;

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.

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

the receiving of the management and control signaling sent by the control device includes:

receiving a first control signaling sent by the control equipment; the first control signaling is used to indicate that the first target node is a source node on the optical layer connection path, where the first control signaling carries wavelength information, input port information, output port information, and ID information of a destination node;

the establishing, according to the management and control signaling, an optical layer connection of the plurality of OTN nodes on the optical layer connection path by using the target OTN node as a source node or a destination node in the plurality of OTN nodes on the optical layer connection path includes:

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

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

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

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

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

receiving a second control signaling sent by the control equipment; the second control signaling is used to indicate that the second target node is a destination node on the optical layer connection path, where the second control signaling carries wavelength information, input port information, and output port information;

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

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

the receiving module is used for receiving a control signaling sent by the control equipment;

and the processing module is used for taking the target OTN node as a source node or a destination node in the plurality of OTN nodes on the 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.

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

the receiving module includes:

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

the processing module comprises:

and the first processing unit is used for configuring optical cross connection according to the input port information and the output port information carried by the first control signaling.

Optionally, the apparatus further comprises:

the configuration module is used for configuring the optical label information in a top-adjusting mode; 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;

a sending module, configured to send the optical label information to an intermediate node; wherein the intermediate node is an OTN node of the plurality of OTN nodes except for the source node and the sink node.

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

the receiving module includes:

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

the processing module comprises:

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

In order to achieve the above object, an embodiment of the present invention further provides an OTN node, where the OTN node is a target OTN node, and the OTN node includes: a transceiver and a processor;

the transceiver is used for receiving a control signaling sent by the control equipment;

the processor is configured to use the target OTN node as a source node or a destination node in 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.

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

the transceiver is further configured to: receiving a first control signaling sent by the control equipment; the first control signaling is used to indicate that the first target node is a source node on the optical layer connection path, where the first control signaling carries wavelength information, input port information, output port information, and ID information of a destination node;

the processor is further configured to: and configuring 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: configuring optical label information in a top-adjusting mode; 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 transceiver is further configured to: sending the optical label information to an intermediate node; wherein the intermediate node is an OTN node of the plurality of OTN nodes except for the source node and the sink node.

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

the transceiver is further configured to: receiving a second control signaling sent by the control equipment; the second control signaling is used to indicate that the second target node is a destination node on the optical layer connection path, where the second control signaling carries wavelength information, input port information, and output port information;

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

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

receiving optical label information sent by a first target node;

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

configuring an optical cross-connect according to the input port and the output port.

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

the receiving module is used for receiving optical label information sent by a first target node;

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

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

In order to achieve the above object, an embodiment of the present invention further provides an OTN node, where the OTN node is an intermediate node, except for a source node and a destination node, in a plurality of OTN nodes on an optical layer connection path, and the OTN node includes: a transceiver and a processor;

the transceiver is used for receiving optical label information sent by a first target node;

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

To achieve the above object, an embodiment of the present invention further provides an OTN node, including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the processor, when executing the program or instructions, performs the steps of the method for establishing optical layer connectivity as described above.

To achieve the above object, an embodiment of the present invention further provides a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method for establishing an optical layer connection as described above.

The technical scheme of the invention has the following beneficial effects:

in the embodiment of the invention, under the condition of receiving a service request, routing calculation is carried out according to the service request, routing information of optical layer connection to be established is determined, and under the condition of obtaining the routing information of the optical layer connection to be established by calculation, a control signaling is sent to a source node and a destination node in an optical layer connection path to be established by combining with an optical cross routing table of each OTN node, and the control signaling is not sent to other nodes in the optical layer connection path to be established, so that the signaling interaction between a control device and the OTN node is reduced, and the efficiency of establishing the optical layer connection is improved.

Drawings

Fig. 1 is an interaction diagram of a control device and an OTN node;

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

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

FIG. 4 is a block diagram of a control device of an embodiment of the present invention;

fig. 5 is a structural diagram of a control apparatus of the embodiment of the present invention;

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

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

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

FIG. 9 is one of the block diagrams of an apparatus for establishing optical layer connectivity according to embodiments of the present invention;

FIG. 10 is a second block diagram of an apparatus for establishing optical layer connections 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 of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

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

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

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

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

Optionally, an OTN system provided in an embodiment of the present invention may include a control device and a plurality of OTN nodes, where the control device and the OTN nodes may implement optical cross connection through interaction of a management and control signaling and interaction of optical label information between the OTN nodes.

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: a service request is received.

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

Step 23: and sending a control signaling to two target 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 tables of the plurality of OTN nodes.

Optionally, the control device may create an optical cross routing table corresponding to each OTN device in advance, where the optical cross routing table is used to indicate an output direction from a first OTN node to at least one second OTN node, and may be understood as that the optical cross routing table for the first OTN node is used to indicate an output direction (or an output port) from the first OTN node to at least one second OTN node; the second OTN node may be a host node on the optical layer connection path, or may be an intermediate node on the optical layer connection path.

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

Alternatively, the control device may calculate the optical layer connection routes and wavelengths to be established based on the OTN node topology information and user input information (e.g., source/sink nodes, ports, etc.). Alternatively, due to the physical characteristics of the optical layer, the route with the minimum hop count can be calculated under the premise of considering the accessibility and loss of the optical transmission distance.

In the above scheme, when a service request is received, routing calculation is performed according to the service request, routing information of an optical layer connection to be established is determined, and when the routing information of the optical layer connection to be established is obtained through calculation, a control signaling is sent to a source node and a destination node in an optical layer connection path to be established in combination with an optical cross routing table of each OTN node, and the control signaling is not sent to other nodes in the optical layer connection path to be established, so that signaling interaction between a control device and the OTN node is reduced, and improvement of efficiency of establishing the optical layer connection is facilitated.

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

In this embodiment, the control device can ensure that the optical connection created on the optical layer connection path to be established is physically reachable through the result obtained by the routing calculation, and therefore, may directly issue the first control signaling to the first target node and issue the second control signaling to the second target node, so that the plurality of OTN nodes on the optical layer connection path to be established configure the optical cross connection, and can ensure that the plurality of OTN nodes on the optical layer connection path are physically reachable.

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

In this embodiment, the control device issues a first control signaling to a first target node, so that the first target node may configure an optical cross connection corresponding to the wavelength according to an input port and an output port carried in the first control signaling, and the control device issues a second control signaling to a second target node, so that the second target node may configure an optical cross connection corresponding to the wavelength according to an input port and an output port carried in the second control signaling; the first target node may further send optical label information to an intermediate node, so that the intermediate node configures the optical cross connection of the wavelength according to the optical label information, thereby establishing optical layer connections of a plurality of OTN nodes on the optical layer connection path, and reducing signaling interaction between the control device and the OTN nodes; wherein the intermediate node is an OTN node of the plurality of OTN nodes except for the source node and the sink node.

Optionally, before the step of sending a management control signaling to two OTN nodes of the plurality of OTN nodes on the optical layer connection path to be established according to the routing information and the optical cross routing tables of the plurality of OTN nodes, the method may further include:

Optionally, the control device may obtain device information of each OTN node in the OTN system to form a global topology; such as: the control device interacts with each OTN node to control signaling, and automatically acquires (or manually configures) device information through a control interface to form the following data structure: network element information (Ne), Port information (Port), cross capability (CrossAbility).

Wherein, the network element information is shown in the following table 1:

TABLE 1

The port information is shown in table 2 below:

TABLE 2

Wherein the crossover capacity is shown in table 3 below:

TABLE 3

Field(s)	Type (B)
		Port 1id	String
Port 2id	String
		Wavelength of light	String

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

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

For example: the control device maintains an optical cross routing table on a per OTN node basis, and the optical cross routing table may include the following information: wavelength, input port, sink node, and output port (or output direction), for example: the optical cross-routing table contents are shown in table 4 below:

TABLE 4

Wavelength of light

Input port

Sink node

Direction of output

The following describes a method for configuring an optical cross routing table corresponding to an OTN node with reference to a specific example:

for example, the OTN node a has a port a and a port b, and one information value of the cross capability table is shown in table 5 below:

TABLE 5

Field(s)	Value taking
		Port 1id	A.a.id
Port 2id	A.b.id
		Wavelength of light	λ

The configuration mode of the optical cross routing table aiming at the adjacent nodes is as follows: and traversing the cross capability table of the OTN node A, and organizing each piece of information into two routes. If two pieces of information are added to the optical cross-routing table of the OTN node a, as shown in table 6 below:

TABLE 6

Wavelength of light	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 mode of the optical cross routing table aiming at the non-adjacent nodes is as follows: besides configuring the routing information of the directly adjacent nodes in the optical cross routing table, the control device needs to add the routing information of the sink nodes reachable through multiple hops in the optical cross routing table.

For example, the optical cross-route of OTN node a has the following information in table 7:

TABLE 7

Wavelength of light	Input port	Sink node	Output port
				λ	A.a.id	B	A.b.id

The optical cross-route of the OTN node B is given with the information in table 8 below:

TABLE 8

Wavelength of light	Input port	Sink node	Output port
				λ	B.a.id	C	B.b.id

Based on the above, the following information in table 9 may be added to the optical cross-routing table of the OTN node a:

TABLE 9

Wavelength of light	Input port	Sink node	Output port
				λ	A.a.id	C	A.b.id

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

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

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

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

a sending module 330, configured to send a management control signaling to two target 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 tables of the plurality of OTN nodes;

Optionally, the sending module 330 includes:

Optionally, the apparatus 300 further comprises:

Optionally, the configuration module includes:

The device in the embodiment of the present invention can implement the processes in each embodiment of the optical layer connection configuration method described above and achieve the same technical effects, and is not described here again to avoid repetition.

The device 300 in the embodiment of the present invention performs routing calculation according to a service request under the condition of receiving the service request, determines routing information of an optical layer connection to be established, and sends a control signaling to a source node and a destination node in an optical layer connection path to be established in combination with an optical cross routing table of each OTN node under the condition of obtaining the routing information of the optical layer connection to be established by calculation, without sending the control signaling to other nodes in the optical layer connection path to be established, thereby reducing signaling interaction between a control device and the OTN node, and facilitating improvement of efficiency of establishing the optical layer connection.

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

the transceiver 420 is configured to receive a service request;

the processor 410 is configured to determine routing information of an optical layer connection to be established according to the service request; sending a control signaling to two target OTN nodes in the plurality of 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 tables of the plurality of OTN nodes;

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

Optionally, the transceiver 420 is further configured to: acquiring cross capability information of each OTN node in a plurality of OTN nodes;

the processor 410 is further configured to: and configuring an optical cross routing table corresponding to each OTN node according to the cross capability information of each OTN node.

Optionally, the processor 410 is further configured to:

The control device 400 in the embodiment of the present invention can implement the processes in the embodiments of the optical layer connection configuration method and achieve the same technical effects, and in order to avoid repetition, details are not described here again.

In the embodiment of the present invention, when receiving a service request, the control device 400 performs routing calculation according to the service request, determines routing information of an optical layer connection to be established, and when calculating the routing information of the optical layer connection to be established, sends a control signaling to a source node and a destination node in an optical layer connection path to be established in combination with an optical cross routing table of each OTN node, but does not send the control signaling to other nodes in the optical layer connection path to be established, thereby reducing signaling interaction between the control device and the OTN node, and facilitating improvement of efficiency of establishing the optical layer connection.

A control device according to another embodiment of the present invention, as shown in fig. 5, includes a transceiver 510, a processor 500, a memory 520, and a program or instructions stored in the memory 520 and executable on the processor 500; the processor 500 implements the steps of the optical layer connection configuration method when executing the program or the instructions, and achieves the same technical effect, and in order to avoid repetition, the description is omitted here.

The transceiver 510 is used for receiving and transmitting data under the control of the processor 500.

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

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

The readable storage medium of the embodiments of the present invention stores a program or instructions thereon, and the program or instructions when executed by a processor implement the steps in the optical layer connection configuration method described above, and can achieve the same technical effects, and in order to avoid repetition, the detailed description is omitted here.

Wherein 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 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, where the method may specifically include the following steps:

step 61: and receiving a management and control signaling sent by the control equipment.

Step 62: 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.

In this embodiment, the target OTN node is a first target node or a second target node, where the first target node may be a source node in the optical layer connection path, and the second target node may be a sink node in the optical layer connection path. In this way, the control device sends the control instruction to the source node and the destination node in the optical layer connection path to be established, and does not send the control signaling to other nodes in the optical layer connection path to be established, so that signaling interaction between the control device and the OTN node is reduced, and the efficiency of establishing the optical layer connection is improved.

Optionally, in a case that the target OTN node is a first target node, the step of receiving the management control signaling sent by the control device may specifically include:

the step of taking the target OTN node as a source node or a destination node of the plurality of OTN nodes on the optical layer connection path according to the management and control signaling, and establishing optical layer connection of the plurality of OTN nodes on the optical layer connection path may specifically include:

Optionally, in a case that the target OTN node is a first target node, after the step of receiving the first management and control signaling sent by the control device, the method may further specifically include:

configuring optical label information in a top-adjusting mode; wherein the optical label information includes: the ID information of the first target node, the wavelength information and the ID information of the sink node; sending the optical label information to an intermediate node; wherein the intermediate node is an OTN node of the plurality of OTN nodes except for the source node and the sink node.

In this embodiment, a first target node receives a first control signaling issued by a control device, and configures optical cross connection corresponding to a wavelength according to an input port and an 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 may configure optical label information on the wavelength of the corresponding port in a way of tuning, where the optical label information may include wavelength information (the wavelength information is wavelength information input by the control device), ID information of the source node (that is, ID information of the local node), and ID information of the sink node (that is, ID information of the sink node input by the control device), and the content of the optical label is as shown in table 10 below:

watch 10

Wavelength of light

Source node

Sink node

Optionally, in a case that the target OTN node is a second target node, the step of receiving the management control signaling sent by the control device may specifically include:

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

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

step 71: and receiving the optical label information sent by the first target node.

Step 72: and matching with an 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 an output port corresponding to the intermediate node.

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

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

Optionally, after receiving the wavelength signal, an intermediate node in the optical layer connection path analyzes the optical label information of the top-tuning from the wavelength signal, and matches with the optical cross-routing table of the intermediate node according to the input port of the wavelength signal, the wavelength in the optical label information, and the three elements of the sink node, to obtain an output port matched with the input port, so as to configure the optical cross-connection according to 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, and ensures that the control device can send the control signaling to the source node and the destination node in the optical layer connection path to be established, and does not send the control signaling to other nodes in the optical layer connection path to be established, thereby reducing signaling interaction between the control device and the OTN node, and facilitating improvement of efficiency of establishing the optical layer connection.

As shown in fig. 8, an interaction diagram of a control device and an OTN node is provided.

The control equipment acquires equipment information of each OTN node in the OTN system and forms a global topology;

the control equipment configures an optical cross routing table of each OTN node according to the global topology;

when a service request is input, the control equipment performs routing calculation according to the input of the service request, and determines routing information of optical layer connection to be established; and issuing a control signaling to a source node and a destination node in an optical layer connection path to be established according to the routing information and the optical cross routing table of each OTN node, and not issuing the control signaling to other nodes in the optical layer connection path.

The source node configures optical cross connection according to a control signaling sent by the control equipment, configures optical label information in a wavelength top-tuning mode and sends the optical label information to the intermediate node;

the host node configures optical cross connection according to a control signaling issued by the control device;

and the intermediate node reads the optical label information and configures optical cross connection according to the matching of the optical label information and the optical cross routing table.

In the scheme, only the control device needs to interact with the source node and the destination node to control signaling when establishing one optical layer connection, so that the signaling message interaction between the control device and the OTN node is greatly reduced; in addition, the establishment of the optical layer connection does not depend on a management and control system to a certain extent, only a source node and a destination node are required to interact with the control device, and the establishment of the optical layer connection is not influenced by the disconnection of an intermediate node (or called as an intermediate node), so that the optical layer connection establishment efficiency is improved.

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

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

a processing module 920, configured to use the target OTN node as a source node or a destination node in the multiple OTN nodes on the optical layer connection path according to the management and control signaling, and establish optical layer connections of 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:

the processing module 920 includes:

Optionally, the apparatus 900 further comprises:

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

the receiving module 910 includes:

the processing module 920 includes:

The apparatus 900 in the embodiment of the present invention can implement each process of the above-mentioned target OTN node establishing optical layer connection method and achieve the same technical effect, and for avoiding repetition, details are not described here again.

The apparatus 900 in the embodiment of the present invention can ensure that the control device does not send the control signaling to other nodes in the optical layer connection path to be established by sending the control instruction to the source node and the destination node in the optical layer connection path to be established, thereby reducing signaling interaction between the control device and the OTN node, and facilitating improvement of efficiency of establishing the optical layer connection.

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

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

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

The OTN node in the embodiment of the present invention can implement each process of the above-mentioned target OTN node establishing optical layer connection method and achieve the same technical effect, and is not described herein again to avoid repetition.

The OTN node in the embodiment of the invention can ensure that the control equipment does not send control signaling to other nodes in the optical layer connection path to be established by sending the control instruction to the source node and the destination node in the optical layer connection path to be established, thereby reducing the signaling interaction between the control equipment and the OTN node and being beneficial to improving the efficiency of establishing the optical layer connection.

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

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

a determining module 1020, configured to match, according to the optical label information and the input port that receives the optical label information, an optical cross routing table corresponding to the intermediate node, and determine an output port corresponding to the intermediate node; wherein the optical cross-routing table is used to indicate an output direction of the intermediate node to at least one third OTN node;

a processing module 1030 configured to configure an optical cross-connect 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 method for establishing an optical layer connection for an OTN node and achieve the same technical effect, and for avoiding repetition, details are not described here again.

The apparatus 1000 in the embodiment of the present invention configures optical cross connection according to optical label information sent by a source node and an optical cross routing table configured by a control device, and ensures that the control device can send a control signaling to the source node and a destination node in an optical layer connection path to be established, and does not send the control signaling to other nodes in the optical layer connection path to be established, thereby reducing signaling interaction between the control device and an OTN node, and facilitating improvement of efficiency of establishing optical layer connection.

An embodiment of the present invention further provides an OTN node, where the OTN node is an intermediate node, except for a source node and a destination node, in a plurality of OTN nodes on an optical layer connection path, and the OTN node includes: a transceiver and a processor;

The OTN node in the embodiment of the present invention can implement each process of the above-described method for establishing an optical layer connection and achieve the same technical effect, and is not described herein again to avoid repetition.

The OTN node in the embodiment of the 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 the control signaling to the source node and the destination node in the optical layer connection path to be established, and not send the control signaling to other nodes in the optical layer connection path to be established, reducing the signaling interaction between the control device and the OTN node, and being beneficial to improving the efficiency of establishing the optical layer connection.

An OTN node according to another embodiment of the present invention, as shown in fig. 11, includes a transceiver 1110, a processor 1100, a memory 1120, and a program or instructions stored on the memory 1120 and executable on the processor 1100; when the processor 1100 executes the program or the instructions, the steps of the method for establishing an optical layer connection are implemented and the same technical effect can be achieved, and are not described herein again to avoid repetition.

The transceiver 1110 is used for receiving and transmitting data under the control of the processor 1100.

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

The readable storage medium of the embodiment of the present invention stores a program or instructions thereon, and the program or instructions, when executed by a processor, implement the steps of the method for establishing an optical layer connection as described above, and can achieve the same technical effects, and in order to avoid repetition, the detailed description is omitted here.

Wherein, the processor is a processor in the OTN node described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It is further noted that many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

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

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

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

receiving a service request;

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

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 optical layer connection configuration method according to claim 2, wherein the second management and control signaling carries wavelength information, input port information, and output port information.

5. The optical layer connection configuration 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 tables of the plurality of OTN nodes, the method further comprises:

6. The optical layer connection configuration method 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 includes:

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

receiving a control signaling sent by control equipment;

8. The method for establishing optical layer connectivity of claim 7, wherein the target OTN node is a first target node;

9. The method for establishing an optical layer connection according to claim 8, wherein after receiving the first management and control signaling sent by the control device, the method further comprises:

10. The method for establishing optical layer connectivity of claim 7, wherein the target OTN node is a second target node;

11. A method for establishing 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 the method comprises the following steps:

receiving optical label information sent by a first target node;

12. An optical layer connection configuration apparatus applied to a control device, the apparatus comprising:

the receiving module is used for receiving the service request;

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

the transceiver is used for receiving a service request;

14. A control device, comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; wherein the processor, when executing the program or instructions, implements the steps of the optical layer connection provisioning method of any of claims 1-6.

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

16. An apparatus for establishing optical layer connection, applied to a target OTN node, the apparatus comprising:

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

18. An optical layer connection establishing apparatus applied to an OTN node, where 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, the apparatus comprising:

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

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; wherein the program or instructions when executed by the processor implement the steps of the method for establishing an optical layer connection as claimed in any one of claims 7 to 11.

21. A readable storage medium having a program or instructions stored thereon, wherein the program or instructions, when executed by a processor, implement the steps of the method for establishing optical layer connectivity according to any of claims 7-11.