CN112235069B - Transmission method, equipment and system integrating optical wavelength division multiplexing - Google Patents

Abstract

The invention discloses a transmission method, equipment and a system fusing optical wavelength division multiplexing, relates to the technical field of communication, and is used for simplifying a network topology structure of an optical fiber transmission system. The method comprises the following steps: the network management device determines the target path after receiving the request message from the source device. The target path is used for transmitting a first optical carrier between the source device and the target device, and the first optical carrier is used for carrying service data. Further, the network management device obtains the path information of the target path and sends the path information of the target path to the path node device in the target path. The path information of the target path is used to instruct the path node device to perform a preset operation (including wavelength direct connection, band and wave add/drop, band and wavelength direct connection, etc.) on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence. The embodiment of the invention is applied to an optical fiber transmission system.

Description

Transmission method, equipment and system integrating optical wavelength division multiplexing

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a transmission method, device, and system integrating optical wavelength division multiplexing.

Background

At present, optical fiber transmission systems generally use Wavelength Division Multiplexing (WDM) technology to multiplex optical carriers with different wavelengths onto one optical fiber for transmission, so as to improve the transmission capacity of the optical fiber transmission system. The WDM technology includes Dense Wavelength Division Multiplexing (DWDM) technology, sparse wavelength division multiplexing (CWDM) technology, and Local Area Network (LAN) wavelength division multiplexing technology.

In the optical fiber transmission system, different source devices send optical carriers of different wavelengths to an optical multiplexer/demultiplexer (having both a multiplexing function and a demultiplexing function) according to different service types or different device types of the source devices. The optical combiner/splitter combines optical carriers of different wavelengths into a multi-wavelength optical carrier including a plurality of wavelengths after receiving the optical carriers of different wavelengths, and transmits the multi-wavelength optical carrier through one optical fiber. Correspondingly, after receiving the multi-wavelength optical carrier, the optical combiner/splitter splits the optical carrier with the single wavelength from the multi-wavelength optical carrier, and transmits the optical carrier with the single wavelength to the target device.

However, one optical multiplexer/demultiplexer can only multiplex or demultiplex optical carriers having a wavelength or a wavelength band within a certain range, and the DWDM technology and the CWDM technology differ in channel spacing and wavelength band. Therefore, the DWDM technology and the CWDM technology need to respectively adopt separate and fixed transmission paths to realize transmission of service data of different service types between different devices. Therefore, the capacity in the optical fiber transmission systematization is small, the application scene is single, and the comprehensive multi-service scenes such as a data center, a special line of a business client, a base station forward transmission and the like cannot be simultaneously borne, so that the network topology structure is complex.

Disclosure of Invention

Embodiments of the present invention provide a transmission method, device, and system integrating optical wavelength division multiplexing, which are used to simplify a network topology in an optical fiber transmission system.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a transmission method is provided. After receiving a request message for requesting to send service data from source equipment, network management equipment determines a target path; the target path is used for transmitting a first optical carrier between the source device and the target device, and the first optical carrier is used for carrying service data. Further, the network management device obtains path information of a target path (including a wavelength of the first optical carrier and a target link sequence), and sends the path information of the target path to at least one path node device, so that each path node device performs a preset operation (including one of combining, passing, and splitting) on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and sends the optical carrier obtained after the preset operation is performed.

In a second aspect, a method of transmission is provided. The path node equipment acquires path information of a target path (the path information of the target path is used for indicating the path node equipment to transmit service data between source equipment and the target equipment, the path information of the target path comprises a wavelength of a first optical carrier and a target link sequence, the first optical carrier is used for bearing the service data, and the target link sequence is used for representing the transmission sequence of the optical carrier in the target path). After receiving the second optical carrier sent by the previous-hop device of the path node device in the target path, the path node device determines the position of the path node device in the target path from the target link sequence according to the wavelength of the first optical carrier. Further, the path node device performs a preset operation (including one of combining, passing, and splitting) on the second optical carrier according to the position of the path node device in the target path, and sends the optical carrier obtained after performing the preset operation on the second optical carrier to the next hop device of the path node device.

In a third aspect, a network management device is provided that includes a receiving unit, a determining unit, an obtaining unit, and a transmitting unit. A receiving unit, configured to receive a request message from a source device. A determining unit for determining the target path after the receiving unit receives the request message. The target path is used for transmitting a first optical carrier between the source device and the target device, and the first optical carrier is used for carrying service data. And an obtaining unit, configured to obtain path information of the target path determined by the determining unit (including a wavelength of the first optical carrier and a target link order, where the target link order includes a transmission order of the optical carrier between two devices connected in the target path in a case where the optical carrier is transmitted through the target path). A sending unit, configured to send the path information of the target path to at least one path node device after the obtaining unit obtains the path information of the target path, so that each path node device performs a preset operation (one of combining, passing, and splitting) on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and sends the optical carrier obtained after the preset operation is performed.

In a fourth aspect, a path node device is provided, which includes an acquisition unit, a determination unit, a processing unit, and a transmission unit. An obtaining unit, configured to obtain path information of a target path (including a wavelength of a first optical carrier and a target link sequence, where the first optical carrier is used to carry service data, and the target link sequence is used to represent a transmission sequence of the optical carrier in the target path). And the determining unit is used for determining the position of the path node equipment in the target path from the target link sequence according to the wavelength of the first optical carrier after receiving the second optical carrier sent by the previous hop equipment of the path node equipment in the target path. And the processing unit is used for performing preset operation (including one of wave combination, direct connection and wave division) on the second optical carrier (the wavelength of the second optical carrier comprises the wavelength of the first optical carrier) according to the position of the path node equipment in the target path after the determining unit determines the position of the path node equipment in the target path. And the sending unit is used for sending the optical carrier obtained after the preset operation is performed on the second optical carrier to the next hop equipment of the path node equipment after the preset operation is performed on the second optical carrier by the processing unit.

In a fifth aspect, there is provided a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the transmission method of the first or second aspect.

In a sixth aspect, a network management device is characterized by comprising: a processor and a memory. Wherein the memory is used to store one or more programs, the one or more programs comprising computer executable instructions, which when run by the network management device, are executed by the processor to cause the network management device to perform the transmission method as described in the first aspect.

In a seventh aspect, a path node device is characterized by including: a processor and a memory. Wherein the memory is for storing one or more programs, the one or more programs including computer executable instructions, which when run by the path node apparatus, are executed by the processor from the memory to cause the path node apparatus to perform the transmission method of the second aspect.

In an eighth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the transmission method of the first or second aspect.

A ninth aspect provides an optical fiber transmission system, including a network management device, a plurality of path node devices, and a plurality of service node devices; the network management device 11 is connected to a plurality of path node devices and a plurality of service node devices, respectively; the network management device is configured to perform the transmission method of the first aspect; each of the plurality of path node devices is configured to perform the transmission method of the second aspect.

The transmission method, the equipment and the system for integrating optical wavelength division multiplexing provided by the embodiment of the invention are applied to an optical fiber transmission system, can realize intelligent multi-band integrated transmission, support low-cost static wavelength path presetting and dynamic wavelength path configuration, have large system capacity and various application scenes, and can simultaneously bear comprehensive multi-service scenes such as a data center, a business client private line, base station forward transmission and the like. By adopting the technical scheme, the invention can determine a target path for transmitting the service data between the source equipment and the target equipment and send the path information of the target path to the path node equipment contained in the target path. Correspondingly, after the path node device in the target path acquires the path information of the target path, the path node device may combine, pass through, or separate the received second optical carrier according to the wavelength of the first optical carrier and the target link sequence in the path information, and send the optical carrier obtained through the processing. Because the path node equipment replaces the optical multiplexer/demultiplexer in different wavelength division multiplexing technologies, different wavelength division multiplexing technologies can transmit different service data through the transmission method and the path node equipment, and the network topology structure in the optical fiber transmission system can be simplified.

Drawings

Fig. 1 is a first structural diagram of an optical fiber transmission system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a transmission method according to an embodiment of the present invention;

fig. 3 is a first flowchart illustrating a transmission method according to an embodiment of the present invention;

fig. 4 is a first schematic structural diagram of a path node device according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a first multiplexer according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a path node device according to an embodiment of the present invention;

fig. 7 is a first schematic structural diagram of a network management device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a network management device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network management device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a path node device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a path node device according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a path node device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, "/" means "or" unless otherwise specified, for example, A/B may mean A or B. "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" or "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

The invention provides a transmission method.A network management device determines a target path between a source device and a target device after receiving a request message of the source device, and then acquires path information of the target path and sends the path information to at least one path node device in the target path. Correspondingly, after receiving the path information, each path node device may select one action from combining waves, passing through waves, and splitting waves to operate and pass through the optical carrier according to the wavelength of the received optical carrier and the position of the path node device in the target path after receiving the optical carrier carrying the service data. Therefore, by adopting the technical scheme, the difference between different wavelength division multiplexing technologies can be not considered, an optical multiplexer/demultiplexer device does not need to be arranged independently for each wavelength division multiplexing technology, each type of source equipment, target equipment and different service types, intelligent multi-band fusion transmission can be realized, the system capacity is large, application scenes are various, comprehensive multi-service scenes such as a data center, a business client special line, base station forward transmission and the like can be simultaneously borne, and the network topology structure of the optical fiber transmission system is greatly simplified.

The transmission method provided by the embodiment of the invention can be suitable for an optical fiber transmission system. Fig. 1 shows a schematic structural diagram of the optical fiber transmission system. As shown in fig. 1, the optical fiber transmission system 10 includes a network management device 11, a plurality of path node devices (in fig. 1, the plurality of path node devices include a path node device 12, a path node device 13, and a path node device 14, only three path node devices are illustrated in the figure, and in a specific implementation, there may be more or less path node devices, and the internal structure and execution actions of each path node device are the same, and for convenience of description, the path node device 12 is described as an example later), and a plurality of service node devices (in fig. 1, the plurality of service node devices include a service node device 15, a service node device 16, a service node device 17, and a service node device 18, only four service node devices are illustrated in the figure, and in a specific implementation, there may be more or less service node devices).

The network management apparatus 11 is connected to a plurality of path node apparatuses and a plurality of service node apparatuses, respectively. The network management device 11 may be connected to the multiple path node devices and the multiple service node devices in a wired manner, or may be connected to the multiple path node devices and the multiple service node devices in a wireless manner, which is not limited in this embodiment of the present invention.

Every two service node devices can be connected through the path node device. The connection mode between the service node device and the path node device and between the path node devices is optical fiber connection.

Illustratively, as shown in fig. 1, the path node device 12 is connected to the service node device 15, the service node device 16, and the path node device 13, respectively, the path node device 13 is connected to the service node device 17 and the path node device 14, and the path node device 14 is further connected to the service node device 19.

It should be noted that fig. 1 only shows an exemplary connection type between the path node device and the service node device, and in practical applications, there may be connections between different devices, for example, the service node device 15 is connected with the service node device 18 through the path node device 13, and the like, which is not described in more detail in the embodiment of the present invention.

The network management device 11 may be configured to determine a target path for service data to be transmitted by a source device (which may be any service node device in fig. 1) after receiving a request message sent by the source device, and the network management device 11 may also be configured to obtain path information of the target path and send the path information of the target path to each device in the target path. For example, when the service node device 15 requests data transmission with the service node device 17, the network management device 11 determines that the target path is the service node device 15, the path node device 12, the path node device 13, and the service node device 17, acquires the path information of the path, and sends the path information to the service node device 15, the path node device 12, the path node device 13, and the service node device 17, respectively.

The path node device 12 may be configured to combine optical carriers with different wavelengths, directly pass through the received optical carrier, and split the received optical carrier. For example, as shown in fig. 1, after receiving the optical carrier transmitted by the service node device 15 through the path node device 12, the path node device 13 may transmit the optical carrier with the preset wavelength to the service node device 17 through wavelength division. The path node device may be an optical link wavelength path node device.

It should be noted that, the different wavelengths that the path node device 12 can multiplex may be the wavelengths in the DWDM technology, the wavelengths in the CWDM/LAN-WDM technology, or the wavelengths in the DWDM technology and the wavelengths in the CWDM/LAN-WDM technology.

The service node device 15, when acting as a target device, may be used to initiate a service request, e.g. sending a request message to the network management device 11. The service node device 15 includes a laser transmitter, which can transmit an optical carrier with a preset wavelength to the outside when serving as a source device, and can negotiate a corresponding working wavelength pair with a target service node device supporting a wavelength negotiation function without a network management instruction. The service node device 15 further includes a laser receiver, which can receive an optical carrier with a preset wavelength sent by the path node device when serving as a target device, and demodulate the optical carrier to obtain service data.

It should be noted that the network management device 11 may be located at any position in any optical fiber transmission system, and may also be integrated with any path node device to form a device, which is not specifically limited in the present invention.

When the network management device 11 and the path node device 12 are integrated in the same device, the communication mode between the network management device 11 and the path node device 12 is communication between internal modules of the device. In this case, the communication flow between the two is the same as "in the case where the network management apparatus 11 and the path node apparatus 12 are independent of each other, the communication flow between the two" is the same.

In the following embodiments provided by the present invention, the present invention is explained by taking an example in which the network management apparatus 11 and the path node apparatus 12 are set independently of each other.

The principle of the transmission method provided by the embodiment of the present invention is described below with reference to the optical fiber transmission system 10 shown in fig. 1.

As shown in fig. 2, after receiving a request message (for example, for requesting to transmit traffic data between a service node device 15 and a service node device 17 (corresponding to a target device in the embodiment of the present invention)) sent by the service node device 15 (corresponding to a source device in the embodiment of the present invention), the network management device 11 determines that a target path is the service node device 15-path node device 12-path node device 13-service node device 17 according to a topology structure that has been established in advance. Further, the network management device 11 acquires the wavelength of the first optical carrier used for carrying the service data and a transmission sequence (corresponding to a target link sequence in the embodiment of the present invention) between devices included in the target path, as path information of the target path, and sends the path information to each device in the target path. Accordingly, the service node device 15 (source device) transmits the first optical carrier to the path node device 12 according to the wavelength of the first optical carrier after receiving the path information. Correspondingly, after receiving the first optical carrier, the path node device 12 determines that the first optical carrier is from the source device 15 according to the wavelength of the first optical carrier, further, the path node device 12 determines the position of the first optical carrier in the target path according to the target link sequence, and further determines that the first optical carrier needs to be multiplexed (corresponding to multiplexing the second optical carrier with the third optical carrier in the embodiment of the present invention) when receiving other optical carriers according to the position, and sends the multi-wavelength optical carrier obtained after multiplexing to the path node device 13. Correspondingly, after receiving the multi-wavelength optical carrier, the path node device 13 performs wavelength division on the multi-wavelength optical carrier according to the wavelength of the first optical carrier to obtain a first optical carrier carrying service data, and further may send the first optical carrier to the service node device 17 (target device). Thus, the path node device has a function as a multiplexer/demultiplexer under different wavelength division multiplexing techniques in the optical fiber transmission system, and can simplify a network topology structure in the optical fiber transmission system.

The following describes a transmission method provided in an embodiment of the present invention with reference to the accompanying drawings.

As shown in fig. 3, the transmission method provided in the embodiment of the present invention includes S201 to S210:

s201, the source device sends a request message to the network management device 11.

Accordingly, the network management apparatus 11 receives the request message from the source apparatus.

The request message is used for requesting to transmit service data between the source device and the target device. The request message includes an identification of the source device and an identification of the target device.

It should be noted that the identifier of the source device and the identifier of the destination device may be location information of the device, a serial number of the device, an identifier of an end station where the device is located, or an address of the device.

In one case, the request message may further include a service type corresponding to the service data.

S202, the network management device 11 determines the target path according to the identifier of the source device and the identifier of the target device.

The target path is used for transmitting a first optical carrier between the source device and the target device, and the first optical carrier is used for carrying service data. The first optical carrier is used for carrying service data.

It should be noted that the target path includes at least one path node device. The target path is specifically configured to transmit the first optical carrier between the source device and the target device through at least one path node device.

As a first possible implementation manner, the network management device 11 queries, from the database, the location where the source device is located according to the identifier of the source device, and queries, from the database, the location where the target device is located according to the identifier of the target device.

It should be noted that, the database of the network management device 11 stores a corresponding relationship between the location of the service node device and the identifier of the service node device.

Further, the network management device 11 determines multiple candidate paths according to the location of the source device and the location of the target device, and according to a network topology pre-stored in the optical fiber transmission system.

It should be noted that, in the multiple candidate paths determined by the network management device 11, each path can establish an optical fiber connection between the source device and the target device.

Thus, the network management apparatus 11 may determine the target path from the plurality of candidate paths according to the preset path policy.

The predicted path strategies comprise the strategies of minimum hop count, shortest path and the like.

The network management device 11 needs to determine information such as the hop count and the path length of each candidate path, and then determines a target path from the multiple candidate paths according to the preset path policy.

It should be noted that the predetermined path policy may be preset in the network management device 11 by an operation and maintenance person of the optical fiber transmission system.

As a second possible implementation manner, the network management device 11 may query multiple candidate paths from the topological relation according to the identifier of the source device and the identifier of the target device.

The topology relationship includes connection relationships between all service node devices and path node devices in the optical fiber transmission network. The topology relationship includes a plurality of topology paths, each topology path being used to establish an optical fiber connection between any two service node devices. One topological path includes the identifications of two service nodes and the identification of at least one path node device.

It should be noted that, after the operation and maintenance personnel deploys the service node device and the path node device, the topology relationship may be preset in the network management device 11 for each topology path.

Further, the network management device determines a target path from the plurality of candidate paths.

It should be noted that, for a specific implementation of this step, reference may be made to the description of the first implementation, and details are not described here again.

It is understood that, after determining the target path, the network management device 11 may determine the identity of each service node device in the target path and the identity of each path node device.

S203, the network management apparatus 11 acquires the path information of the target path.

The path information of the target path includes a wavelength of the first optical carrier and a target link sequence, and the target link sequence is used to characterize a transmission sequence of the optical carrier in the target path.

In one design, in order to be able to acquire the wavelength of the first optical carrier, S203 in this embodiment of the present invention may include the following S2031 to S2033.

S2031, the network management apparatus 11 determines, according to the identifier of the source apparatus and according to the wavelength pair in the wavelength plan, an available transmission wavelength of the source apparatus.

As a possible implementation manner, the network management device 11 may query the device type of the source device from the database according to the identifier of the source device.

It should be noted that the database includes a corresponding relationship between the device type of the service node device and the identifier of the service node device. The device types of the service node device include a local center type, a remote center type, a universal multi-interface type, and a universal single-interface type. The operation and maintenance staff may preset the correspondence between the device type and the identifier of the service node device in the database of the network management device 11.

The source device will have a corresponding available transmission wavelength for the particular connection interface of the wavelength path node.

The service node device of the central office type is integrated with a WDM wavelength controller which can adjust the wavelength of the emitted optical carrier, wherein a plurality of available transmission wavelengths exist. The wavelength of the optical carrier that the service node device of the remote type can transmit is adjustable. The service node equipment of the general multi-interface type comprises a plurality of access interfaces, and can simultaneously receive or transmit a plurality of optical carriers with different wavelengths. A common single interface type of device includes an outgoing interface and an incoming interface that can simultaneously receive or transmit an optical carrier.

The office center type service node device can support the transceiving of single-wavelength optical carriers, multi-wavelength optical carriers and multi-band optical carriers.

Further, the network management device 11 determines an available transmission wavelength of the source device according to the device type of the source device.

It should be noted that the database of the network management device 11 stores the device type of the service node device and the available transmission wavelength corresponding to the device type of the service node device.

If the source device and the target device use a two-fiber bidirectional scheme, the wavelength pairs of the two types of devices may use the same transmission wavelength.

S2032, the network management apparatus 11 determines an available transmission wavelength of the target apparatus according to the identifier of the target apparatus.

It should be noted that, for a specific implementation manner of this step, reference may be made to the specific description of S2031, which is not described herein again. The execution sequence of S2031 and S2032 is not limited in the embodiment of the present invention. In the actual application process, S2031 may be executed first, and then S2032 may be executed; s3032 may be executed first, and then S2031 may be executed; s2031 and S2032 may also be performed simultaneously.

S2033, the network management apparatus 11 determines the wavelength of the first optical carrier from the available transmission wavelength of the source apparatus and the available transmission wavelength of the destination apparatus.

The wavelength of the first optical carrier is a corresponding wavelength pair of the available transmission wavelength of the source device and the available transmission wavelength of the target device.

It should be noted that, after receiving the request messages sent by the multiple source devices, the network management device 11 allocates different wavelengths of the first optical carrier to each source device.

In one design, the network management device 11 may further select, according to a preset rule, one or more wavelengths from the multiple available transmission wavelengths as the wavelength of the first optical carrier according to a service type corresponding to the service data when the source device and the target device have multiple same available transmission wavelengths at the same time.

It should be noted that the preset rule includes a corresponding relationship between the service type and the wavelength, and the preset rule may be preset in the network management device 11 by an operation and maintenance worker.

On the other hand, the network management device 11 may generate the target link order according to the connection situation between the devices in the target path when determining the target link order. The target link sequence includes a sequence number of each device in the target path, an identification of the device, and a previous-hop device and a next-hop device of each device in the target path.

In one case, the path information of the target path may further include the number of target interfaces and the rate of the target interfaces.

The target interface number is the number of interfaces of the source device for transmitting the first optical carrier, and the target interface rate is the interface rate of the source device for transmitting the first optical carrier.

In one implementation, the network management device 11 may further determine, according to the device type of the source device, information such as the number of available interfaces and the available interface rate of the source device, determine, according to the service type, the number of target interfaces from the number of available interfaces, and determine, according to the service type, the target interface rate from the available interface rates.

It should be noted that the database of the network management device 11 stores a corresponding relationship between the service type and the number of interfaces, and a corresponding relationship between the service type and the interface rate.

S204, the network management apparatus 11 sends the path information of the target path to the source apparatus.

The path information of the target path is used for instructing the source device to modulate and transmit the first optical carrier according to the path information.

Accordingly, the source device receives the path information of the target path transmitted by the network management device 11.

And S205, the source device modulates by using the service data according to the wavelength of the first optical carrier to obtain the first optical carrier.

The first optical carrier is used for carrying the service data.

As a possible implementation manner, the source device obtains the wavelength of the first optical carrier from the path information of the target path, and modulates to obtain the first optical carrier by using the service data.

It should be noted that, in this step, the implementation manner of modulating the service data into the first optical carrier may refer to the prior art, and is not described herein again.

S206, the source device sends the first optical carrier to the next hop device of the source device according to the target link sequence.

As a possible implementation manner, the source device queries an identifier of a next hop device of the source device from the target link sequence, and sends the modulated first optical carrier to the next hop device of the source device through the laser transmitter according to the obtained device identifier.

And under the condition that the path information of the target path comprises the number of the target interfaces and the target interface rate, the source equipment transmits the first optical carrier according to the number of the target interfaces and the corresponding target interface rate.

S207, the network management apparatus 11 sends the path information of the target path to the path node apparatus in the target path.

The path information of the target path is further used for instructing the path node device to execute a preset operation on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and to send the optical carrier obtained after the preset operation is executed. The preset operation comprises the following steps: one of wave combination, direct connection and wave division.

Accordingly, the path node device 12 acquires the path information of the target path, and stores the path information of the target path.

The path information of the target path is used for instructing the path node device to transmit the service data between the source device and the target device.

It should be noted that, in the embodiment of the present invention, the execution sequence of S207 is sequential to that of S204, and the network management device may first execute S204 and then execute S207, may first execute S207 and then execute 204, and may also execute S204 and S207 at the same time.

Since the internal structure and the execution method of each path node device in at least one path node device in the target path are the same, for convenience of description, in the subsequent description of at least one path node device in the target path, only the path node device 12 shown in fig. 1 is described, and the actions performed by the path node device can indicate the actions of other path node devices in the embodiment of the present invention.

S208, after the path node device 12 receives the second optical carrier, according to the wavelength of the first optical carrier, the position of the path node device 12 in the target path is determined from the target link sequence.

Wherein the wavelength of the second optical carrier comprises the wavelength of the first optical carrier.

As a possible implementation, the path node device 12 determines the wavelength of the first optical carrier from the second optical carrier sent by the previous hop device of the path node device in the target path after receiving the second optical carrier.

It should be noted that, the wavelength of the first optical carrier is determined from the second optical carrier, and one wavelength may be determined from a plurality of wavelengths of the second optical carrier according to a preset rule or randomly as the wavelength of the first optical carrier. Alternatively, when the second optical carrier is a single-wavelength optical carrier, the wavelength of the second optical carrier is determined as the wavelength of the first optical carrier.

It can be understood that the path node device 12 may perform the transmission method provided by the embodiment of the present invention on each of the plurality of wavelengths in the second optical carrier.

Further, the path node device 12 determines path information of the target path from the plurality of path information stored in the path node device 12 according to the wavelength of the first optical carrier.

The plurality of path information are used for indicating paths of the plurality of source devices for sending the service data to different target devices. One path information corresponds to one source device and one target device.

Subsequently, the path node device 12 may determine the position of the path node device 12 in the target path from the path information of the target path according to the identifier of the path node device 12.

It should be noted that the position of the path node device 12 in the target path may include the following four cases:

in the first case, the previous-hop device of the path node device 12 is the source device, and the next-hop device of the path node device 12 is the destination device.

In this case, the destination path includes only one path node device 12, and the source device transmits traffic data to the destination device through the path node device 12.

In the second case, the previous hop device of the path node device 12 is not the source device, and the next hop device of the path node device is not the destination device.

In this case, there are a plurality of path node apparatuses in the target path, and the path node apparatus 12 is a path node apparatus at an intermediate position among the plurality of path node apparatuses.

In the third case, the previous-hop device of the path node device 12 is the source device, and the next-hop device of the path node device 12 is not the destination device.

In this case, a plurality of path node apparatuses exist in the target path, and the path node apparatus 12 is the first path node apparatus connected to the source apparatus among the plurality of path node apparatuses.

In a fourth case, the previous hop device of the path node device 12 is not the source device, and the next hop device of the path node device 12 is the destination device.

In this case, a plurality of path node apparatuses exist in the target path, and the path node apparatus 12 is the last path node apparatus connected to the target apparatus among the plurality of path node apparatuses.

It can be understood that, in the first case and the third case, the second optical carrier received by the path node device 12 is the optical carrier sent by the source device, that is, the second optical carrier is the first optical carrier. In the second and fourth cases, the second optical carrier received by the path node device 12 is an optical carrier sent by another path node device in the multiple path node devices, that is, the second optical carrier is an optical carrier obtained by combining the first optical carrier with another optical carrier.

S209, the path node device 12 performs a preset operation on the second optical carrier according to the position of the path node device 12 in the target path.

The preset operation comprises one of wave combination, direct connection and wave division.

In the first and second cases, the path node device 12 may perform a pass-through or a wave-combining operation on the second optical carrier.

In the third case, the path node apparatus 12 may perform multiplexing on the second optical carrier.

In the fourth case, the path node apparatus 12 may perform a wavelength division operation on the second optical carrier to obtain the first optical carrier.

S210, the path node device 12 sends the optical carrier obtained by performing the preset operation on the second optical carrier to the next hop device of the path node device 12.

As a possible implementation manner, the path node device 12 determines a next hop device of the path node device 12 according to a position of the path node device 12 in the target path, and sends the obtained optical carrier to the next hop device of the path node device 12.

In this embodiment of the present invention, in order to perform a preset operation on the second carrier, S209 provided in the embodiment of the present invention specifically includes any one of the following S2091 to S2096.

S2091, in the first case, the path node device 12 directly passes through the second optical carrier (the first optical carrier) transmitted by the source device to the destination device without performing multiplexing or demultiplexing.

S2092, in the second case, if the path node device 12 does not receive any of the third optical carrier and the fourth optical carrier, the path node device 12 passes the second optical carrier sent by the previous-hop device of the path node device 12 through to the next-hop device of the path node device 12.

The channel interval of the wave band in which the second optical carrier is located is within a first range, and the channel interval of the wave band in which the third optical carrier is located is within a second range. The path corresponding to the third optical carrier is a first path, and the next hop device of the path node device 12 in the target path is the same as the next hop device of the path node device 12 in the first path. The channel interval of the waveband in which the fourth optical carrier is located is within the first range, the path corresponding to the fourth optical carrier is a second path, and the next hop device of the path node device 12 in the second target path is the same as the next hop device of the path node device 12 in the second path.

It should be noted that the channel interval of the wavelength band in which the second optical carrier is located is within a first range, and the channel interval of the wavelength band in which the third optical carrier is located is within a second range, which indicates that the second optical carrier and the third optical carrier are optical carriers in different WDM technologies. The channel interval of the waveband in which the fourth optical carrier is located is within the first range, which indicates that the second optical carrier and the fourth optical carrier are optical carriers in the same WDM technology.

Illustratively, if the first range is 1.5nm or less and the channel spacing of the wavelength band in which the second optical carrier is located is 0.8nm, it indicates that the second optical carrier is an optical carrier under DWDM technology. If the second range is greater than or equal to 10nm and the channel interval of the waveband where the second optical carrier is located is 20nm, it indicates that the second optical carrier is an optical carrier under the CWDM technology.

S2093, in the second case, if the path node device 12 receives the third optical carrier or the fourth optical carrier, the path node device 12 combines the second optical carrier with the received third optical carrier or the fourth optical carrier, and directly transmits the optical carrier obtained after the combination to the next hop device of the path node device 12.

S2094, in the third case, if the path node device 12 does not receive any of the third optical carrier and the fourth optical carrier, the path node device 12 passes the second optical carrier sent by the previous-hop device of the path node device 12 through to the next-hop device of the path node device 12.

S2095, under the third condition, if the path node device 12 receives the third optical carrier or the fourth optical carrier, the path node device 12 combines the second optical carrier and the received third optical carrier or the fourth optical carrier, and directly transmits the optical carrier obtained after the combination to the next hop device of the path node device 12.

S2096, in the fourth case, the path node device 12 performs wavelength division on the second optical carrier to obtain the first optical carrier.

In the embodiment of the present invention, in order to enable the path node device 12 to combine wavelengths under different WDM technologies, as shown in fig. 4, the path node device 12 provided in the embodiment of the present invention includes a first optical multiplexer/demultiplexer a and a plurality of second optical multiplexer/demultiplexers (as shown in fig. 1, the plurality of second optical multiplexer/demultiplexers includes a second optical multiplexer/demultiplexer A1, a second optical multiplexer/demultiplexer A2, and a second optical multiplexer/demultiplexer A3, only three second optical multiplexer/demultiplexers are exemplarily shown in the figure, and there may be more or fewer second optical multiplexer/demultiplexers in specific implementation).

Wherein, a plurality of second optical combining and branching filters are respectively connected with the first optical combining and branching filter A.

The first optical multiplexer/demultiplexer a is configured to switch between the fifth optical carrier and a plurality of sixth optical carriers. The fifth optical carrier is an optical carrier including a plurality of bands, and a range in which a channel spacing of each of the plurality of bands is located includes a first range and a second range. Each of the sixth optical carriers is an optical carrier including a plurality of wavelengths, the plurality of wavelengths are within one band, and a range in which a channel interval of a band in which the plurality of wavelengths are located is a first range or a second range.

It should be noted that the first optical multiplexer/demultiplexer may be a waveband optical multiplexer/demultiplexer, and is configured to combine optical carriers of different wavebands to obtain optical carriers including different wavebands. The first optical multiplexer/demultiplexer may also be configured to demultiplex an optical carrier including different wavelength bands to obtain a plurality of optical carriers of different wavelength bands.

The plurality of second optical multiplexer/demultiplexer switches between the plurality of seventh optical carriers and any one of the plurality of sixth optical carriers. The wavelengths of the plurality of seventh optical carriers are within a waveband, and the range of the channel interval of the waveband in which the wavelengths of the plurality of seventh optical carriers are located is a first range or a second range.

It should be noted that the second optical multiplexer/demultiplexer may be a wavelength optical multiplexer/demultiplexer, and is configured to combine optical carriers with different wavelengths to obtain optical carriers with different wavelengths. The second optical multiplexer/demultiplexer may also be configured to demultiplex optical carriers including different wavelengths to obtain a plurality of optical carriers of different wavelengths.

In the practical application process of the embodiment of the invention, the second optical multiplexer/demultiplexer can be a combined application of a plurality of independent optical multiplexer/demultiplexers or an integrated optical multiplexer/demultiplexer. The optical multiplexer/demultiplexer may be implemented based on a dielectric film filter (TFF), an Array Waveguide Grating (AWG), an optical fiber grating circulator, a diffraction grating, an optical fiber fused taper, a Wavelength Selective Switch (WSS), and other technologies, and may be further subdivided into a mode sensitive and insensitive to a working environment temperature, and a specific implementation mode may refer to the prior art, which is not described herein again.

Fig. 5 shows a functional schematic diagram of the first optical multiplexer/demultiplexer, wherein the first optical multiplexer/demultiplexer may comprise a plurality of filter switching characteristics, each filter switching characteristic being used to switch signals of at least one wavelength band. For example, as shown in fig. 5, the wavelength/band filtering characteristic 1 of the first optical multiplexer/demultiplexer may filter the O band, implement a signal band pass of the O band, and implement signal band rejection of the E band, S band, C band, and L band. The wavelength/waveband filtering characteristic 2 of the first optical multiplexer/demultiplexer can realize signal band-pass of an O waveband, an E waveband and an S waveband, and simultaneously realize signal band-stop of a C waveband and an L waveband.

It should be noted that the wavelength range of the O band is 1260nm to 1360nm, the wavelength range of the e band is 1360nm to 1460nm, the wavelength range of the s band is 1460 to 1530nm, the wavelength range of the c band is 1530nm to 1565nm, and the wavelength range of the l band is 1565nm to 1625nm.

It should be noted that the structure shown in fig. 4 does not constitute a limitation on the path node apparatus 12, and in practical applications, the path node apparatus according to the embodiment of the present invention may include more or less components than those shown in fig. 4, or may combine some components, or may have different component arrangements.

Fig. 6 shows a schematic diagram of a possible structure of the path node device 12, and taking fig. 6 as an example, the path node device 12 further includes two first optical combining/splitting filters a and B, and the path node device 12 further includes a plurality of second optical combining/splitting filters (as in fig. 1, the plurality of second optical combining/splitting filters includes a second optical combining/splitting filter A1, a second optical combining/splitting filter A2, a second optical combining/splitting filter B1, and a second optical combining/splitting filter B2, only four second optical combining/splitting filters are shown in the figure for example, and there may be more or fewer second optical combining/splitting filters in the specific implementation).

Wherein, first optical multiplexer/demultiplexer A is connected with first optical multiplexer/demultiplexer B and second optical multiplexer/demultiplexer A1, second optical multiplexer/demultiplexer A2, and first optical multiplexer/demultiplexer B still is connected with second optical multiplexer/demultiplexer B1 and second optical multiplexer/demultiplexer B2, and second optical multiplexer/demultiplexer A1 still is connected with second optical multiplexer/demultiplexer B1, and second optical multiplexer/demultiplexer A2 still is connected with second optical multiplexer/demultiplexer B2.

The path node apparatus 12 further includes a plurality of ingress and egress interfaces for receiving or transmitting optical carriers of different wavelengths/bands.

The access interface connected to each of the first optical multiplexer/demultiplexer a and the first optical multiplexer/demultiplexer B is used for communication with another path node device. And the access interfaces respectively connected with the second optical multiplexer/demultiplexer A1, the second optical multiplexer/demultiplexer A2, the second optical multiplexer/demultiplexer B1 and the second optical multiplexer/demultiplexer B2 are used for communicating with other path node equipment or service node equipment.

The first optical multiplexer/demultiplexer A is connected to the first optical multiplexer/demultiplexer B, and is configured to receive an optical carrier containing multiple bands sent by the first optical multiplexer/demultiplexer B, and further configured to send an optical carrier containing multiple bands to the first optical multiplexer/demultiplexer B.

The first optical multiplexer/demultiplexer a is connected to the second optical multiplexer/demultiplexer A1 and the second optical multiplexer/demultiplexer A2, respectively, and is configured to multiplex an optical carrier within one wavelength band transmitted by the second optical multiplexer/demultiplexer A1 and an optical carrier within another wavelength band transmitted by the second optical multiplexer/demultiplexer A2. Or, the first optical multiplexer/demultiplexer a is further configured to decompose the received optical carrier including multiple wavelength bands, and send the decomposed optical carrier of each wavelength band to the corresponding second optical multiplexer/demultiplexer A1 and second optical multiplexer/demultiplexer A2.

It should be noted that the function of the first optical multiplexer/demultiplexer B is the same as that of the first optical multiplexer/demultiplexer a, and reference may be made to the description of the first optical multiplexer/demultiplexer a in the specific use process, which is not described herein again.

The second optical multiplexer/demultiplexer A1 is connected to the second optical multiplexer/demultiplexer B1, and is configured to, after receiving an optical carrier that includes multiple wavelengths of one waveband and is sent by the first optical multiplexer/demultiplexer a, decompose the optical carrier that includes multiple wavelengths of one waveband to obtain an optical carrier that includes one wavelength, send the optical carrier of the one wavelength to the second optical multiplexer/demultiplexer B1 connected to the second optical multiplexer/demultiplexer A1, or send the optical carrier of the one wavelength to another path node device or a service node device through an access interface connected to the second optical multiplexer/demultiplexer.

It should be noted that, the functions of the second optical multiplexer/demultiplexer A2, the second optical multiplexer/demultiplexer B1 and the second optical multiplexer/demultiplexer B2 can refer to the description of the second optical multiplexer/demultiplexer A1, and are not repeated herein.

For example, taking fig. 6 as an example, when the path node device needs to combine and pass through a plurality of optical carriers with different wavelengths, the path node device may receive the optical carrier with the wavelength λ through the second demultiplexer A1 ₁ And the wavelength is lambda ₂ Further, the optical carrier of wavelength λ is passed through the second splitter A1 ₁ And the wavelength is lambda ₂ The obtained wavelength includes lambda ₁ And lambda ₂ And sending the obtained optical carrier to the first optical multiplexer/demultiplexer a.

Wherein the wavelength is λ ₁ And the wavelength is lambda ₂ The optical carriers of (a) are optical carriers within the same wavelength band.

Meanwhile, the second wave splitter A2 receives the wave length of lambda ₃ And the wavelength is lambda ₄ After the optical carrier of (2), the wavelength is set to be lambda ₃ And the wavelength is lambda ₄ To obtain the wavelength including lambda ₃ And lambda ₄ And sends the optical carrier waiting for the optical carrier to the first optical multiplexer/demultiplexerA。

Further, the received wavelength of the first optical multiplexer/demultiplexer A includes λ ₁ And lambda ₂ And the wavelength includes lambda ₃ And λ ₄ After the optical carrier wave is received, the received two optical carrier waves are combined to obtain the wavelength including lambda ₁ 、λ ₂ 、λ ₃ And lambda ₄ And the obtained optical carrier is sent out through an input/output interface connected with the first optical multiplexer/demultiplexer a, or the obtained optical carrier is sent out through a first optical multiplexer/demultiplexer B connected with the first optical multiplexer/demultiplexer a.

It should be noted that, the exemplary description is that the path node device 12 performs a process of combining and passing through, and for the combining and splitting of the path node device 12, because the transmission directions of the optical carriers between the first optical multiplexer/splitter and the second optical multiplexer/splitter are opposite, in the process of splitting and passing through the path node device 12, reference may be specifically made to the description in the process of combining, and details are not repeated here.

The embodiment of the invention provides a transmission method, equipment and a system integrating optical wavelength division multiplexing, which are applied to an optical fiber transmission system. Correspondingly, after receiving the path information of the target path, the path node device in the target path may combine, pass through, or split the received second optical carrier according to the wavelength of the first optical carrier and the target link sequence in the path information, and send the optical carrier obtained through the processing. Because the path node equipment replaces optical multiplexer/demultiplexer devices in different wavelength division multiplexing technologies, different wavelength division multiplexing technologies can transmit different service data through the transmission method and the path node equipment, and the network topology structure in the optical fiber transmission system can be simplified.

The scheme provided by the embodiment of the invention is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The embodiment of the present invention may perform division of function modules on the network management device according to the method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present invention is schematic, and is only one logic function division, and another division manner may be provided in actual implementation.

Fig. 7 is a schematic structural diagram of a network management device according to an embodiment of the present invention. As shown in fig. 8, the network management device 11 is used to simplify the network topology in the optical fiber transmission system, for example, to execute the transmission method shown in fig. 3. The network management apparatus 11 includes a receiving unit 111, a determining unit 112, an acquiring unit 113, and a transmitting unit 114.

A receiving unit 111, configured to receive a request message from a source device. The request message is used for requesting transmission of service data between the source device and the target device. The request message includes an identification of the source device and an identification of the target device. For example, as shown in fig. 3, the receiving unit 111 may be configured to execute S201 in fig. 3.

A determining unit 112, configured to determine the target path according to the identifier of the source device and the identifier of the target device after the receiving unit 111 receives the request message. The target path is used for transmitting a first optical carrier between the source device and the target device, and the first optical carrier is used for carrying service data. For example, as shown in fig. 3, the determining unit 112 may be configured to execute S202 in fig. 3.

An obtaining unit 113, configured to obtain the path information of the target path determined by the determining unit 112. The path information of the target path includes a wavelength of the first optical carrier and a target link sequence, and the target link sequence is used for representing a transmission sequence of the optical carrier in the target path. For example, as shown in fig. 3, the obtaining unit 113 may be configured to execute S203 in fig. 3.

A sending unit 114, configured to send, after the obtaining unit 113 obtains the path information of the target path, the path information of the target path to the path node device in the target path, where the path information of the target path is used to instruct the path node device to perform a preset operation on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and send the optical carrier obtained after the preset operation is performed. The preset operation comprises the following steps: one of wave combination, straight-through and wave division. For example, as shown in fig. 3, the sending unit 114 may be configured to execute S207 in fig. 3.

Optionally, as shown in fig. 7, the obtaining unit 113 provided in the embodiment of the present invention is specifically configured to determine, according to the identifier of the source device and according to the wavelength pair in the wavelength plan, an available transmission wavelength of the source device. For example, the acquisition unit 113 may be configured to execute S2031.

The obtaining unit is specifically further configured to determine an available transmission wavelength of the target device according to the identifier of the target device. For example, the acquisition unit 113 may be configured to execute S2032.

The obtaining unit is specifically further configured to determine a wavelength of the first optical carrier from the available transmission wavelength of the source device and the available transmission wavelength of the target device. The wavelength of the first optical carrier is the same wavelength of the available transmission wavelengths of the source device and the target device. For example, the acquisition unit 113 may be configured to execute S2033.

In the case that the functions of the integrated modules are implemented in the form of hardware, another possible structural schematic diagram of the network management device in the above embodiment is provided in the embodiment of the present invention. As shown in fig. 8, a network management device 30 for simplifying the network topology in an optical fiber transmission system, for example, for performing the transmission method shown in fig. 3. The network management device 30 includes a processor 301, a memory 302, and a bus 303. The processor 301 and the memory 302 may be connected by a bus 303.

The processor 301 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 301 may be a general-purpose Central Processing Unit (CPU), or may be another general-purpose processor. Wherein a general purpose processor may be a microprocessor or any conventional processor or the like.

For one embodiment, processor 301 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 8.

The memory 302 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 302 may exist separately from the processor 301, and the memory 302 may be connected to the processor 301 through the bus 304 for storing instructions or program code. The transmission method provided by the embodiment of the present invention can be implemented when the processor 301 calls and executes the instructions or program codes stored in the memory 302.

In another possible implementation, the memory 302 may also be integrated with the processor 301.

The bus 303 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

It is to be noted that the configuration shown in fig. 8 does not constitute a limitation of the network management device 30. In addition to the components shown in fig. 8, the network management device 30 may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

As an example, in conjunction with fig. 7, the functions implemented by the respective units included in the network management device are the same as those of the processor 301 in fig. 10.

Optionally, as shown in fig. 8, the network management device 30 provided in the embodiment of the present invention may further include a communication interface 304.

A communication interface 304 for connecting with other devices through a communication network. The communication network may be an ethernet network, a radio access network, a Wireless Local Area Network (WLAN), etc. The communication interface 304 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.

In one design, in the network management device provided in the embodiment of the present invention, the communication interface may be further integrated in the processor.

Fig. 9 shows another hardware configuration of the network management apparatus in the embodiment of the present invention. As shown in fig. 9, network management device 40 may include a processor 401 and a communication interface 402. The processor 401 is coupled to a communication interface 402.

The functions of the processor 401 may refer to the description of the processor 301 above. The processor 401 also has a memory function, and the function of the memory 302 can be referred to.

The communication interface 402 is used to provide data to the processor 401. The communication interface 402 may be an internal interface of the communication device, or may be an external interface (corresponding to the communication interface 303) of the communication device.

It is noted that the configuration shown in fig. 9 does not constitute a limitation of the network management apparatus 40, and the network management apparatus 40 may include more or less components than those shown in fig. 9, or combine some components, or a different arrangement of components, in addition to the components shown in fig. 9.

In the embodiment of the present invention, the path node device may be divided into the functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 10 is a schematic structural diagram of a path node device according to an embodiment of the present invention. As shown in fig. 8, the path node device 12 is used to simplify the network topology in a fiber optic transmission system, for example, to perform the transmission method shown in fig. 3. The path node apparatus 12 includes an acquisition unit 121, a determination unit 122, a processing unit 123, and a transmission unit 124.

An obtaining unit 121, configured to obtain path information of the target path. The path information of the target path is used to instruct the path node device to transmit service data between the source device and the target device, and the path information of the target path includes a wavelength of a first optical carrier and a target link sequence, and the first optical carrier is used to carry the service data. The target link sequence is used to characterize the transmission sequence of the optical carriers in the target path. For example, as shown in fig. 3, the obtaining unit 121 may be configured to execute S207.

A determining unit 122, configured to determine, according to the wavelength of the first optical carrier, the position of the path node device in the target path from the target link sequence after receiving the second optical carrier. The wavelength of the second optical carrier comprises the wavelength of the first optical carrier. For example, as shown in fig. 3, the determination unit 122 may be configured to execute S208.

A processing unit 123, configured to, after the determining unit 122 determines the position of the path node device in the target path, perform a preset operation on the second optical carrier according to the position of the path node device in the target path. The preset operation comprises one of wave combination, direct connection and wave division. For example, as shown in fig. 3, the processing unit 123 may be configured to execute S209.

A sending unit 124, configured to send, after the processing unit 123 performs the preset operation on the second optical carrier, the optical carrier obtained after performing the preset operation on the second optical carrier to a next hop device of the path node device. For example, as shown in fig. 3, the sending unit 124 may be configured to execute S210.

Optionally, as shown in fig. 10, the processing unit 123 provided in the embodiment of the present invention is specifically configured to, at a position of the path node device in the target path,: and if the third optical carrier is received under the condition that the last hop equipment of the path node equipment is the source equipment and the next hop equipment of the path node equipment is not the target node, combining the second optical carrier and the third optical carrier. The channel interval of the waveband in which the second optical carrier is located is within a first range, and the channel interval of the waveband in which the third optical carrier is located is within a second range. For example, the processing unit 123 may be configured to execute S2095 provided in the above embodiment of the present invention.

Optionally, as shown in fig. 10, the processing unit 123 provided in the embodiment of the present invention is specifically configured to: and under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is the target node, performing wave splitting on the second optical carrier to obtain the first optical carrier. For example, processing unit 123 may be configured to execute S2096 provided in the above embodiments of the present invention.

Optionally, as shown in fig. 10, the processing unit 123 provided in the embodiment of the present invention is specifically configured to, at a position of the path node device in the target path,: and under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is not the target node, if other optical carriers are not received, the second optical carrier is sent to the next hop equipment of the path node equipment. For example, the processing unit 123 may be configured to execute S2092 provided in the above embodiment of the present invention.

Optionally, the path node device 12 provided in the embodiment of the present invention includes a first optical multiplexer/demultiplexer and a plurality of second optical multiplexer/demultiplexers.

The plurality of second optical multiplexer/demultiplexers are respectively connected with the first optical multiplexer/demultiplexer.

The first optical multiplexer/demultiplexer is configured to switch between the fifth optical carrier and a plurality of sixth optical carriers. The fifth optical carrier is an optical carrier including a plurality of bands, and a range in which a channel spacing of each of the plurality of bands is located includes a first range and a second range. Each of the sixth optical carriers is an optical carrier including multiple wavelengths, the multiple wavelengths are within one wavelength band, and a range of channel intervals of the wavelength band in which the multiple wavelengths are located is a first range or a second range.

The plurality of second optical multiplexer/demultiplexer switches between the plurality of seventh optical carriers and any one of the plurality of sixth optical carriers. The wavelengths of the seventh optical carriers are within a waveband, and a range of channel intervals of the waveband in which the wavelengths of the seventh optical carriers are located is a first range or a second range.

In the case of implementing the functions of the integrated modules in the form of hardware, the embodiment of the present invention provides another possible structural schematic diagram of the path node device in the above embodiment. As shown in fig. 11, a path node apparatus 50 is used to simplify the network topology in a fiber optic transmission system, for example, to perform the transmission method shown in fig. 3. The path node apparatus 50 includes a processor 501, a memory 502, and a bus 503. The processor 501 and the memory 502 may be connected by a bus 503.

The processor 501 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 501 may be a general-purpose central processing unit 123 (CPU), or may be another general-purpose processor. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.

For one embodiment, processor 501 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 8.

The memory 502 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 502 may be present separately from the processor 501, and the memory 502 may be connected to the processor 501 via a bus 504 for storing instructions or program code. The transmission method provided by the embodiment of the present invention can be implemented when the processor 501 calls and executes the instructions or program codes stored in the memory 502.

In another possible implementation, the memory 502 may also be integrated with the processor 501.

The bus 503 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.

It is to be noted that the configuration shown in fig. 11 does not constitute a limitation of the path node apparatus 50. In addition to the components shown in fig. 11, the path node apparatus 50 may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

As an example, in connection with fig. 10, functions implemented by respective units included in the path node apparatus are the same as those of the processor 501 in fig. 11.

Optionally, as shown in fig. 11, the path node device 50 provided in the embodiment of the present invention may further include a communication interface 504.

A communication interface 504 for connecting with other devices through a communication network. The communication network may be an ethernet network, a wireless access network, a Wireless Local Area Network (WLAN), or the like. The communication interface 504 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.

In one design, in the path node device provided in the embodiment of the present invention, the communication interface may be further integrated in the processor.

Fig. 12 shows another hardware configuration of the path node apparatus in the embodiment of the present invention. As shown in fig. 12, path node device 60 may include a processor 601 and a communication interface 602. Processor 601 is coupled to a communication interface 602.

The functions of the processor 601 may refer to the description of the processor 501 above. The processor 601 also has a memory function, and the function of the memory 502 can be referred to above.

The communication interface 602 is used to provide data to the processor 601. The communication interface 602 may be an internal interface of the communication device, or may be an external interface of the communication device (corresponding to the communication interface 503).

It should be noted that the configuration shown in fig. 12 does not constitute a limitation of the path node apparatus 60, and that the path node apparatus 60 may include more or less components than those shown in fig. 12, or combine some components, or a different arrangement of components, in addition to those shown in fig. 12.

Through the above description of the embodiments, those skilled in the art may clearly understand that, for convenience and simplicity of description, only the division of each functional unit is illustrated. In practical applications, the above function allocation can be performed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

An embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer executes the instructions, the computer executes each step of the path node device or each step of the network management device in the method flow shown in the foregoing method embodiment.

Embodiments of the present invention provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the transmission method performed by the path node apparatus or the transmission method performed by the network management apparatus in the above-described method embodiments.

The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), read-Only Memory (ROM), erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), optical storage devices, magnetic storage devices, or any other form of computer-readable storage medium known in the art, in any suitable combination of the above, or any other form of computer-readable storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

Since the network management device, the path node device, the optical fiber transmission system, the computer-readable storage medium, and the computer program product in the embodiments of the present invention may be applied to the method described above, the technical effects obtained by the embodiments of the method may also refer to the embodiments of the method described above, and the embodiments of the present invention are not described herein again.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are included in the scope of the present invention.

Claims (16)

1. A transmission method is applied to a network management device and is characterized by comprising the following steps:

receiving a request message from a source device; the request message is used for requesting to transmit service data between the source device and the target device, and the request message comprises the identifier of the source device and the identifier of the target device;

determining a target path according to the identifier of the source device and the identifier of the target device, and acquiring path information of the target path; the target path is used for transmitting a first optical carrier between the source device and a target device, and the first optical carrier is used for carrying the service data; the path information of the target path comprises the wavelength of the first optical carrier and a target link sequence, and the target link sequence is used for representing the transmission sequence of the optical carrier in the target path;

sending path information of a target path to path node equipment in the target path, where the path information of the target path is used to instruct the path node equipment to perform a preset operation on a received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and send an optical carrier obtained after the preset operation is performed; the preset operation comprises the following steps: one of wave combination, straight-through and wave division; the path node device comprises a first optical multiplexer/demultiplexer and a plurality of second optical multiplexer/demultiplexers;

the plurality of second optical combining and splitting filters are respectively connected with the first optical combining and splitting filter;

the first optical multiplexer/demultiplexer is configured to switch between a fifth optical carrier and a plurality of sixth optical carriers; the fifth optical carrier is an optical carrier comprising a plurality of bands, and a range of a channel interval of each band in the plurality of bands includes a first range and a second range; each sixth optical carrier in the plurality of sixth optical carriers is an optical carrier including a plurality of wavelengths, the plurality of wavelengths are within one band, and a range in which channel intervals of bands in which the plurality of wavelengths are located is the first range or the second range;

the plurality of second optical multiplexer/demultiplexer is configured to switch between a plurality of seventh optical carriers and any one of the plurality of sixth optical carriers; the wavelengths of the seventh optical carriers are within a waveband, and a range of channel intervals of the waveband in which the wavelengths of the seventh optical carriers are located is a first range or a second range.

2. The transmission method according to claim 1, wherein obtaining the path information of the target path comprises:

determining the available transmission wavelength of the source equipment according to the identifier of the source equipment;

determining an available transmission wavelength of the target equipment according to the identifier of the target equipment and a wavelength pair in a wavelength plan;

determining a wavelength of the first optical carrier from an available transmission wavelength of the source device and an available transmission wavelength of the target device; the wavelength of the first optical carrier is a corresponding wavelength pair of the available transmission wavelength of the source device and the available transmission wavelength of the target device.

3. A transmission method is applied to path node equipment, and is characterized by comprising the following steps:

acquiring path information of a target path; the path information of the target path is used for indicating that service data is transmitted between source equipment and target equipment, the path information includes a wavelength of a first optical carrier and a target link sequence, and the first optical carrier is used for carrying the service data; the target link sequence is used for representing the transmission sequence of the optical carrier in the target path;

after receiving a second optical carrier, determining the position of the path node equipment in the target path from the target link sequence according to the wavelength of the first optical carrier; the wavelength of the second optical carrier comprises the wavelength of the first optical carrier;

performing a preset operation on the second optical carrier according to the position of the path node equipment in the target path; the preset operation comprises one of wave combination, direct connection and wave division;

sending the optical carrier obtained after the preset operation is executed on the second optical carrier to the next hop equipment of the path node equipment;

the path node device comprises a first optical multiplexer/demultiplexer and a plurality of second optical multiplexer/demultiplexers;

the plurality of second optical combining/splitting filters are respectively connected with the first optical combining/splitting filter;

the first optical multiplexer/demultiplexer is configured to switch between a fifth optical carrier and a plurality of sixth optical carriers; the fifth optical carrier is an optical carrier comprising a plurality of bands, and the range of the channel interval of each band in the plurality of bands comprises a first range and a second range; each sixth optical carrier in the multiple sixth optical carriers is an optical carrier including multiple wavelengths, the multiple wavelengths are within one waveband, and a range of channel intervals of a waveband in which the multiple wavelengths are located is the first range or the second range;

the plurality of second optical multiplexer/demultiplexers are configured to switch between a plurality of seventh optical carriers and any one of the plurality of sixth optical carriers; the wavelengths of the seventh optical carriers are within a waveband, and a range of channel intervals of the waveband in which the wavelengths of the seventh optical carriers are located is a first range or a second range.

4. The transmission method according to claim 3, wherein the performing a preset operation on the second optical carrier according to the position of the path node device in the target path includes:

the position of the path node equipment in the target path is as follows: if a third optical carrier is received under the condition that a previous hop device of the path node device is the source device and a next hop device of the path node device is not the target device, combining the second optical carrier and the third optical carrier; the channel interval of the waveband in which the second optical carrier is located is within a first range, and the channel interval of the waveband in which the third optical carrier is located is within a second range.

5. The transmission method according to claim 3, wherein the performing a preset operation on the second optical carrier according to the position of the path node device in the target path includes:

the position of the path node equipment in the target path is as follows: and under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is the target equipment, splitting a second optical carrier to obtain the first optical carrier.

6. The transmission method according to claim 3, wherein the performing a preset operation on the second optical carrier according to the position of the path node device in the target path includes:

the position of the path node equipment in the target path is as follows: and if the other optical carriers are not received under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is not the target equipment, sending the second optical carrier to the next hop equipment of the path node equipment.

7. The network management equipment is characterized by comprising a receiving unit, a determining unit, an acquiring unit and a sending unit;

the receiving unit is used for receiving a request message from a source device; the request message is used for requesting to transmit service data between the source equipment and target equipment; the request message comprises an identification of the source device and an identification of a target device;

the determining unit is configured to determine a target path according to the identifier of the source device and the identifier of the target device after the receiving unit receives the request message; the target path is used for transmitting a first optical carrier between the source device and a target device, and the first optical carrier is used for carrying the service data;

the obtaining unit is configured to obtain the path information of the target path determined by the determining unit; the path information of the target path includes a wavelength of the first optical carrier and a target link sequence, where the target link sequence is used to characterize a transmission sequence of the optical carrier in the target path;

the sending unit is configured to send, after the obtaining unit obtains the path information of the target path, the path information of the target path to a path node device in the target path, where the path information of the target path is used to instruct the path node device to perform a preset operation on the received optical carrier according to the wavelength of the first optical carrier and the target link sequence, and send the optical carrier obtained after the preset operation is performed; the preset operation comprises the following steps: one of wave combination, direct connection and wave division;

the path node device includes a first optical multiplexer/demultiplexer and a plurality of second optical multiplexer/demultiplexers;

the plurality of second optical combining and splitting filters are respectively connected with the first optical combining and splitting filter;

the first optical multiplexer/demultiplexer is configured to switch between a fifth optical carrier and a plurality of sixth optical carriers; the fifth optical carrier is an optical carrier comprising a plurality of bands, and the range of the channel interval of each band in the plurality of bands comprises a first range and a second range; each sixth optical carrier in the multiple sixth optical carriers is an optical carrier including multiple wavelengths, the multiple wavelengths are within one waveband, and a range of channel intervals of a waveband in which the multiple wavelengths are located is the first range or the second range;

the plurality of second optical multiplexer/demultiplexers are configured to switch between a plurality of seventh optical carriers and any one of the plurality of sixth optical carriers; the wavelengths of the plurality of seventh optical carriers are within a waveband, and the range of the channel interval of the waveband where the wavelengths of the plurality of seventh optical carriers are located is a first range or a second range.

8. The network management device according to claim 7, wherein the obtaining unit is specifically configured to determine an available transmission wavelength of the source device according to the identifier of the source device;

the obtaining unit is specifically further configured to determine, according to the identifier of the target device and according to a wavelength pair in a wavelength plan, an available transmission wavelength of the target device;

the obtaining unit is specifically further configured to determine a wavelength of the first optical carrier from an available transmission wavelength of the source device and an available transmission wavelength of the target device; the wavelength of the first optical carrier is a corresponding wavelength pair of the available transmission wavelength of the source device and the available transmission wavelength of the target device.

9. A path node device is characterized by comprising an acquisition unit, a determination unit, a processing unit and a sending unit;

the acquisition unit is used for acquiring the path information of the target path; the path information of the target path is used to instruct the path node device to transmit service data between the source device and the target device, where the path information of the target path includes a wavelength of a first optical carrier and a target link sequence, and the first optical carrier is used to carry the service data; the target link sequence is used for representing the transmission sequence of the optical carriers in the target path;

the determining unit is configured to determine, after receiving the second optical carrier, a position of the path node device in the target path from the target link sequence according to the wavelength of the first optical carrier; the wavelength of the second optical carrier comprises the wavelength of the first optical carrier;

the processing unit is configured to, after the determining unit determines the position of the path node device in the target path, perform a preset operation on the second optical carrier according to the position of the path node device in the target path; the preset operation comprises one of wave combination, direct connection and wave division;

the sending unit is configured to send, to a next hop device of the path node device, an optical carrier obtained after the preset operation is performed on the second optical carrier by the processing unit;

the path node device comprises a first optical multiplexer/demultiplexer and a plurality of second optical multiplexer/demultiplexers;

the plurality of second optical combining and splitting filters are respectively connected with the first optical combining and splitting filter;

the first optical multiplexer/demultiplexer is configured to switch between a fifth optical carrier and a plurality of sixth optical carriers; the fifth optical carrier is an optical carrier comprising a plurality of bands, and a range of a channel interval of each band in the plurality of bands includes a first range and a second range; each sixth optical carrier in the multiple sixth optical carriers is an optical carrier including multiple wavelengths, the multiple wavelengths are within one waveband, and a range of channel intervals of a waveband in which the multiple wavelengths are located is the first range or the second range;

the plurality of second optical multiplexer/demultiplexer is configured to switch between a plurality of seventh optical carriers and any one of the plurality of sixth optical carriers; the wavelengths of the plurality of seventh optical carriers are within a waveband, and the range of the channel interval of the waveband where the wavelengths of the plurality of seventh optical carriers are located is a first range or a second range.

10. The path node equipment according to claim 9, wherein the processing unit is specifically configured to, at a location of the path node equipment in the target path: if a third optical carrier is received under the condition that a previous hop device of the path node device is the source device and a next hop device of the path node device is not the target device, combining the second optical carrier and the third optical carrier; the channel interval of the waveband in which the second optical carrier is located is within a first range, and the channel interval of the waveband in which the third optical carrier is located is within a second range.

11. The path node apparatus of claim 9, wherein the processing unit is specifically configured to, at a location of the path node apparatus in the target path: and under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is the target equipment, performing wave splitting on the second optical carrier to obtain the first optical carrier.

12. The path node equipment according to claim 9, wherein the path node equipment is specifically configured to, at a location of the path node equipment in the target path: and if other optical carriers are not received under the condition that the last hop equipment of the path node equipment is not the source equipment and the next hop equipment of the path node equipment is not the target equipment, sending the second optical carrier to the next hop equipment of the path node equipment.

13. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the transmission method of any of claims 1-2 or 3-6.

14. A network management device, comprising: a processor and a memory; wherein the memory is configured to store one or more programs, the one or more programs including computer-executable instructions that, when executed by the network management device, cause the network management device to perform the transmission method of claim 1 or 2 by executing the computer-executable instructions stored by the memory.

15. A path node device comprising a processor and a memory; wherein the memory is configured to store one or more programs, the one or more programs including computer-executable instructions that, when executed by the processor, cause the processor to perform the transmission method of any of claims 3-6 by executing the computer-executable instructions stored by the memory.

16. An optical fiber transmission system comprising a network management device, a plurality of path node devices, and a plurality of service node devices;

the network management equipment is respectively connected with the path node equipment and the service node equipment;

the network management device is configured to perform the transmission method of any one of claims 1-2;

each of the plurality of path node devices is configured to perform the transmission method of any of claims 3-6.

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