CN111447036A

CN111447036A - Communication method, device and system

Info

Publication number: CN111447036A
Application number: CN201910045228.5A
Authority: CN
Inventors: 杨涛; 李金高; 宋利; 钱卫京; 郑春阳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-07-24
Anticipated expiration: 2039-01-17
Also published as: CN111447036B; WO2020147766A1

Abstract

The application discloses a communication method, a device and a system, and belongs to the field of communication. The method comprises the following steps: a first optical network node ONU receives a management message from a management network through a first port included in the first optical network node ONU and receives a service message from a metropolitan area network through a second port included in the first optical network node ONU, wherein the management message belongs to a management service, and the service message belongs to a user service; the first ONU generates a data frame, wherein the data frame comprises message data in the management message; the first ONU converts the data frame into a first optical signal with a first wavelength and converts the service message into a second optical signal with a second wavelength, wherein the first wavelength is different from the second wavelength; the first ONU transmits the first optical signal and the second optical signal to a second ONU. The method and the device can avoid influencing normal transmission of the management service.

Description

Communication method, device and system

Technical Field

The present application relates to the field of communications, and in particular, to a communication method, apparatus, and system.

Background

A metropolitan area network and an Optical Network Unit (ONU) are deployed in different areas, which may be cities and the like. The metropolitan area network of each area is connected to ONUs, and the ONUs of each area are connected by optical fibers. A machine room may be deployed in the area, and the devices in the machine room form a local area network, and the local area network is connected to a metropolitan area network deployed in the area where the machine room is located. The devices in the room are connected to a management switch to form a management network for the room, through which the devices in the room can be managed.

For the local area networks in the two areas, a service channel may be established between the local area networks in the two areas, where the service channel includes a channel from the local area network in one area to the ONU in the area, a channel between the ONU in the area and the ONU in the other area, and a channel between the ONU in the other area and the local area network in the other area, and the service channel is used to transmit user traffic between the two local area networks. In order to perform unified management on the management networks of the two areas, a controller may be set in the management network of one area, and the controller establishes a management channel on the basis of the service channel, so that the controller may directly send a management service to the management network of the area and send a management service to the management network of the other area through the management channel, so as to implement unified management on the management networks of the two areas.

In the process of implementing the present application, the inventor finds that the prior art has at least the following problems:

because the management channel is established on the basis of the service channel, when the service channel is abnormal, the normal transmission of the management service is affected.

Disclosure of Invention

In order to avoid influencing the normal transmission of the management service, the application provides a communication method, a communication device and a communication system. The technical scheme is as follows:

in a first aspect, the present application provides a communication method, in which a first optical network node ONU receives a management packet from a management network through a first port included in the ONU and receives a service packet from a metropolitan area network through a second port included in the ONU, where the management packet belongs to a management service; generating a data frame, wherein the data frame comprises message data in the management message; converting the data frame into a first optical signal with a first wavelength and converting the service message into a second optical signal with a second wavelength, wherein the first wavelength is different from the second wavelength; transmitting the first optical signal and the second optical signal to a second ONU. Because the first wavelength and the second wavelength are different, the different wavelengths correspond to different channels between the two ONUs, and because the first ONU receives the management service and the user service through two different ports, a first optical signal corresponding to the management service and a second optical signal corresponding to the user service are transmitted on different channels between the first ONU and the second ONU, so that a management channel for transmitting the management service and a service channel for transmitting the user service, which are established based on the two channels, can be separated, so that the normal transmission of the management service is not affected by the abnormality of the service channel.

In a possible implementation manner of the first aspect, the data frame is an OTN data frame of a first optical transport network, and the first ONU generates a second OTN data frame; and the first ONU adds the message data in the management message to a target field of the second OTN data frame to obtain a first OTN data frame. The OTN data frame is a data frame transmitted on an optical supervisory channel between two ONUs, and thus, the message data is added to the second OTN data frame to obtain a first OTN data frame, so that the message data can be transmitted using the optical supervisory channel, and the service message can be transmitted on an optical service channel between the two ONUs, so that the management service and the user service are transmitted on two different channels, thereby separating a management channel for transmitting the management service and a service channel for transmitting the user service.

In a possible implementation manner of the first aspect, the first ONU removes a preset type of packet header field from a packet header of the management packet, so as to obtain packet data in the management packet. This can reduce the amount of data transmitted.

In a possible implementation manner of the first aspect, the first ONU includes at least one buffer queue, and each buffer queue in the at least one buffer queue corresponds to a priority; the first ONU identifies a priority field of the management message, extracts the priority of the management message from the priority field, and caches message data of the management message in a cache queue corresponding to the priority of the management message; selecting one buffer queue from the at least one buffer queue through a preset strategy according to the priority corresponding to each buffer queue; and acquiring message data from the selected cache queue, and generating a data frame comprising the acquired message data. Because the message data in the buffer queue is selected according to the priority of the message, the message data with high priority can be sent preferentially.

In a possible implementation manner of the first aspect, the preset type header field is a check field.

In a possible implementation manner of the first aspect, in the method, a first optical network node ONU receives an optical signal sent by a second ONU; acquiring a first optical signal with a first wavelength and a second optical signal with a second wavelength from the optical signals, converting the first optical signal into a data frame, and extracting message data from the data frame; packaging the message data into a management message belonging to a management service; sending the management message to a management network through a first port included in the management message; and converting the second optical signal into a service message, and sending the service message to a metropolitan area network through a second port included in the service message. Because the first wavelength and the second wavelength are different, the different wavelengths correspond to different channels between the two ONUs, so that a first optical signal corresponding to the management service and a second optical signal corresponding to the pipeline service are transmitted on different channels between the two ONUs, and a management channel for transmitting the management service and a service channel for transmitting the pipeline service, which are established based on the two channels, can be separated, so that the normal transmission of the management service is not influenced by the abnormality of the service channel.

In a possible implementation manner of the first aspect, the first ONU generates a preset type of packet header field according to the packet data; and adding the message header field in the message data to obtain a management message. Therefore, when the management message is transmitted on the optical fiber, the preset type of message header field does not need to be transmitted, and the transmitted data volume can be reduced.

In a possible implementation manner of the first aspect, the data frame is an OTN data frame, and the first ONU extracts the message data from a target field of the OTN data frame. The OTN data frame is a data frame transmitted on an optical supervisory channel between two ONUs, and thus message data is placed in the first OTN data frame, so that the message data can be transmitted using the optical supervisory channel, and a service message can be transmitted on an optical service channel between the two ONUs, so that management traffic and pipe traffic are transmitted on two different channels, thereby separating a management channel for transmitting the management traffic and a service channel for transmitting the pipe traffic.

In a second aspect, the present application provides a communication device for performing the method of the first aspect or any one of the possible implementations of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect or any one of its possible implementations.

In a third aspect, the present application provides a computer program product comprising a computer program stored in a computer readable storage medium, and the computer program is loaded by a processor to implement the method of the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, the present application provides a non-transitory computer-readable storage medium for storing a computer program which is loaded by a processor to execute the instructions of the method of the first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, the present application provides a chip comprising programmable logic circuits and/or program instructions for implementing the method of the first aspect or any possible implementation manner of the first aspect when the chip is run.

In a sixth aspect, the present application provides a communication system comprising a first optical network node, ONU, and a second ONU; in the system, the first ONU is configured to receive, through a first port included in the first ONU, a management packet from a management network in an area where the first ONU is located, and receive, through a second port included in the first ONU, a service packet from a metropolitan area network in the area where the first ONU is located, where the management packet belongs to a management service, and the service packet belongs to a user service; generating a data frame, wherein the data frame comprises message data in the management message; converting the data frame into a first optical signal with a first wavelength and converting the service message into a second optical signal with a second wavelength, wherein the first wavelength is different from the second wavelength; combining the first optical signal and the second optical signal into a path of optical signal, and sending the path of optical seat number to the second ONU;

the second ONU is configured to obtain a first optical signal with a first wavelength and a second optical signal with a second wavelength from the one optical signal, convert the first optical signal into a data frame, extract packet data from the data frame, encapsulate the packet data into a management packet, and send the management packet to a management network in an area where the management packet is located through a first port included in the management packet; and converting the second optical signal into a service message, and sending the service message to a metropolitan area network in the area of the second optical signal through a second port included in the service message.

Because the first wavelength and the second wavelength are different, the different wavelengths correspond to different channels between the first ONU and the second ONU, and the first ONU receives the management service and the user service through two different ports, so that a first optical signal corresponding to the management service and a second optical signal corresponding to the user service are transmitted on different channels between the first ONU and the second ONU, and a management channel for transmitting the management service and a service channel for transmitting the user service which are established based on the two channels can be separated, so that the normal transmission of the management service cannot be influenced by the abnormity of the service channel.

Drawings

Fig. 1 is a schematic structural diagram of a network architecture according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an ONU according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another network architecture provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of another ONU provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of another ONU provided in the embodiment of the present application;

fig. 6 is a flowchart of a communication method provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of another network architecture provided in the embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication method provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an SC2 board according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The metropolitan area network and the ONU are deployed in different areas, and the areas can be cities and the like. The metro network of each zone is connected to ONUs, and the ONUs of each zone are connected by optical fibers, thus interconnecting the metro networks of different zones. For example, referring to fig. 1, a metropolitan area network 1a deployed in area 1 is connected to ONU1b deployed in area 1, a metropolitan area network 2a deployed in area 2 is connected to ONU2b deployed in area 2, and ONU1b and ONU2b are connected by an optical fiber.

A computer room may be deployed in the area, and the devices in the computer room belong to a local area network connected to a metropolitan area network deployed in the area where the computer room is located.

Still referring to fig. 1, taking the area 1 in fig. 1 as an example, in order to manage the devices in the room, the devices in the room have a management interface through which the devices are connected to a management switch 1c, the management switch 1c has a monitoring interface through which the management switch 1c can be connected to the ONU1b in the area where the room is located, the devices in the room and the management switch 1c belong to a management network 1d, and the devices in the room can be managed through the management network 1 d.

Alternatively, the management switch 1c may be a normal switch, and may be referred to as a management switch since the switch belongs to a switch in the management network.

Since the management networks in different areas are relatively dispersed, it is inconvenient to manage the management networks in different areas. In order to solve the inconvenience problem, the management networks in different areas may be interconnected, so that a controller may be set in the management network in one area, and the controller may send a management service to the management networks in different areas to implement unified management on the management networks in different areas, thereby solving the inconvenience problem.

In order to be able to interconnect the management networks of different areas, a first port for transmitting management traffic and a second port for transmitting user traffic are provided in the ONU of each area. For each area, the area comprises a management network, a metropolitan area network and an ONU, the second port of the ONU is connected to the metropolitan area network, and the monitoring interface of the management switch belonging to the management network is connected to the first port of the ONU by using a physical line, which does not pass through the metropolitan area network, so that for any two management switches of the area, since the ONUs of the two areas are connected by optical fibers, the management switch in each area is connected to the ONU by using a physical line, so that a channel for transmitting management traffic can be established between the two management switches to interconnect the management networks of the two different areas.

Optionally, the first port may be an ethernet interface or the like.

For example, still referring to fig. 1, an area 1 is deployed with a machine room, each device in the machine room is connected to a management switch 1c through a management interface thereof, the device in the machine room and the management switch 1c both belong to a management network 1d, an ONU1b deployed in the area 1 is provided with a first port for transmitting management traffic and a second port for transmitting user traffic, and a physical line is used for connection between a monitoring interface of the management switch 1c and the first port of the ONU1b, the physical line does not pass through a metropolitan area network 1a in the area 1, and the metropolitan area network 1a in the area 1 is connected to the second port of the ONU1 b. A machine room is deployed in the area 2, each device in the machine room is connected to the management switch 2c through a management interface thereof, each device in the machine room and the management switch 2c belong to a management network 2d, the ONU2b deployed in the area 2 is provided with a first port for transmitting management traffic and a second port for transmitting user traffic, and the monitoring interface of the management switch 2c and the first port of the ONU2b are connected by using a physical line which does not pass through the metropolitan area network 2a in the area 2, and the metropolitan area network 2a in the area 2 is connected to the second port of the ONU2b, so that the management network 1d and the management network 2d are connected. As such, channels for transmitting management traffic including a channel between the management switch 1c and the ONU1b, a channel between the ONU1b and the ONU2b, and a channel between the ONU2b and the management switch 2c can be established between the management switch 1c and the management switch 2 c. A controller 3 is deployed in the management network 1d, and the controller 3 can send management services to the management network 2d through the channel, so that the controller 3 can perform unified management on the management network 1d and the management network 2 d; alternatively, the controller 3 (not shown in the figure) is deployed in the management network 2d, and the controller 3 can send the management service to the management network 1d through the channel, so that the controller 3 can perform unified management on the management network 1d and the management network 2 d.

Referring to fig. 2, for each of the ONUs ONU1b and ONU2b described above, the ONU includes a monitoring unit 1, an optical fiber interface unit 2, an optical cross-connect unit 3, and a service access unit 4, the monitoring unit 1 is provided with a first port for transmitting management services, and the service access unit 4 includes at least one second port for transmitting user services;

the optical fiber interface unit 2 is connected with the monitoring unit 1 and the optical cross unit 3 respectively, and the optical cross unit 3 is further connected with each second port in the service access unit 4. The optical fiber interface unit 2 is also connected to other ONUs via optical fibers.

Optionally, when the ONU sends an optical signal to another ONU, the monitoring unit 1 is configured to receive, through the first port, a management packet sent by a management network in an area where the ONU is located, extract packet data from the management packet, generate a data frame including the packet data, convert the data frame into a first optical signal with a first wavelength, and send the first optical signal to the optical fiber interface unit 2;

the optical cross-connection unit 3 is configured to receive a service packet from a metropolitan area network in an area where the ONU is located through a second port included in the service access unit 4, convert the service packet into a second optical signal with a second wavelength, and send the second optical signal to the optical fiber interface unit 2, where the first wavelength is different from the second wavelength;

and the optical fiber receiving port unit 2 is used for receiving the first optical signal and the second optical signal and sending the first optical signal and the second optical signal to other ONUs on an optical fiber.

Each second port in the service access unit 4 corresponds to a second wavelength, the second wavelength corresponding to each second port is different, and the second wavelength corresponding to each second port is different from the first wavelength. When receiving a service packet sent by the metropolitan area network through a second port included in the service access unit 4, the optical cross unit 3 determines a second wavelength corresponding to the second port, and converts the service packet into a second optical signal according to the determined second wavelength.

The user service is a service initiated by a user in a metropolitan area network, for example, when the user needs to download a video, the initiated download service is a user service, and the service message may be a message including video data of the video. A management service is a service for managing and controlling devices in a network. There may be multiple management services in the management network, and each management service has its own management packet. For example, a management service for controlling a device in a network, a management packet belonging to the management service may be a control packet for controlling a device in a network. For another example, the management packet belonging to the management service for authenticating the device in the network may be a management packet for authenticating the device.

Optionally, when the ONU receives optical signals sent by other ONUs, the optical fiber interface unit 2 is configured to receive optical signals sent by other ONUs from an optical fiber, acquire a first optical signal with a first wavelength and a second optical signal with a second wavelength from the optical signals, send the first optical signal to the monitoring unit 1, and send the second optical signal to the optical cross unit 3;

the monitoring unit 1 is configured to convert the first optical signal into a data frame, extract message data from the data frame, encapsulate the message data into a management message belonging to a management service, and send the management message to a management network in an area where the ONU is located through the first port.

And the optical cross-connection unit 3 is configured to convert the second optical signal into a service packet belonging to a user service, determine a second port corresponding to a second wavelength of the second optical signal, and send the service packet to a metropolitan area network in an area where the ONU is located through the second port in the service access unit 4.

The header of the management packet may be a virtual local area network (V L AN) header or AN internet protocol address (IP) header, where the header of the management packet includes a priority field, and the priority field includes a priority of the management packet.

For any two ONUs in the network architecture shown in fig. 1, for example, referring to ONU1b and ONU2b shown in fig. 3, a first port of monitoring unit 11 of ONU1b is connected to a monitoring interface of management switch 1c disposed in area 1 where ONU1b is located, each second port included in traffic access unit 41 of ONU1b is connected to metropolitan area network 1a disposed in area 1 where ONU1b is located, and optical fiber interface unit 21 of ONU1b is connected to optical fiber interface unit 22 of ONU2b by using an optical fiber. A first port of monitoring unit 12 of ONU2b is connected to a monitoring interface of management switch 2c disposed in area 2 where ONU2b is located by using a physical line, and each second port included in traffic access unit 42 of ONU2b is connected to metropolitan area network 2a disposed in area 2 where ONU2b is located.

There is an optical supervisory channel between supervisory unit 11 of ONU1b and supervisory unit 12 of ONU2b, which optical supervisory channel comprises the connection between supervisory unit 11 of ONU1b and fiber interface unit 21, the optical supervisory channel established over the optical fiber between fiber interface unit 21 of ONU1b and fiber interface unit 22 of ONU2b, and the connection between fiber interface unit 22 of ONU2b and supervisory unit 12.

Wherein monitoring unit 11 of ONU1b transmits a data frame to monitoring unit 12 of ONU2b via the optical supervisory channel, and/or monitoring unit 12 of ONU2b transmits a data frame to monitoring unit 11 of ONU1b via the optical supervisory channel, to monitor whether the optical fiber between ONU1b and ONU2b is normal.

Alternatively, a management channel for transmitting management traffic between the management switch 1c and the management switch 2c may be established based on the optical supervisory channel.

The management channel for transmitting the management traffic between the management switch 1c and the management switch 2c may include a channel between the management switch 1c and the monitoring unit 11 of the ONU1b, an optical supervisory channel between the monitoring unit 11 of the ONU1b and the monitoring unit 12 of the ONU2b, and a channel between the monitoring unit 12 of the ONU2b and the management switch 2 c.

The traffic channels for transmitting user traffic between devices within area 1 and devices within area 2 may include a channel between devices within area 1 and optical cross-over unit 31 of ONU1b, an optical traffic channel between optical cross-over unit 31 of ONU1b and optical cross-over unit 32 of ONU2b, and a channel between optical cross-over unit 32 of ONU2b and devices within area 2.

The optical traffic channels between optical cross-connect unit 31 of ONU1b and optical cross-connect unit 32 of ONU2b include the connection between optical cross-connect unit 31 of ONU1b and optical fiber interface unit 21, the optical traffic channel established on the optical fiber between optical fiber interface unit 21 of ONU1b and optical fiber interface unit 22 of ONU2b, and the connection between optical fiber interface unit 22 of ONU2b and optical cross-connect unit 32.

The optical service channel and the optical monitoring channel which are established on the optical fiber are two different channels, and the two channels are distinguished by using different optical signal wavelengths on the optical fiber, wherein the optical monitoring channel corresponds to a first wavelength, the optical service channel corresponds to a second wavelength, and the first wavelength and the second wavelength are different, so that the decoupling of the service channel and the management channel is realized.

Thus, when the management service and the user service are transmitted, the monitoring unit 11 of the ONU1b receives a management packet belonging to the management service from the management switch 1c through the first port included therein, extracts packet data from the management packet, generates a data frame including the packet data, converts the data frame into a first optical signal of a first wavelength, and transmits the first optical signal to the optical fiber interface unit 21 of the ONU1 b; the optical cross-connect unit 31 of ONU1b receives a service packet belonging to a user service from a metro network 1a in area 1 via the service access unit 41 in ONU1b, converts the service packet into a second optical signal with a second wavelength, and transmits the second optical signal to the optical fiber interface unit 21 of ONU1 b; the optical fiber receiving port unit 21 of the ONU1b transmits the first optical signal and the second optical signal on the optical fiber. The management packet is transmitted to ONU1b not via metropolitan area network 1a in area 1 but via a physical line between management switch 1c and monitoring unit 11 of ONU1 b.

The optical fiber receiving port unit 22 of ONU2b receives an optical signal on an optical fiber, distinguishes a first optical signal of a first wavelength and a second optical signal of a second wavelength from the optical signal, transmits the first optical signal to the monitoring unit 12 of ONU2b, and transmits the second optical signal to the optical cross-connect unit 32 of ONU2 b; the monitoring unit 12 of the ONU2b converts the first optical signal into a data frame, extracts message data from the data frame, encapsulates the message data into a management message, and sends the management message to the management switch 2c through the first port; the optical cross-connect unit 32 of ONU2c converts the second optical signal into a traffic packet, determines a second port corresponding to the second wavelength of the second optical signal, and sends the traffic packet to the device in area 2 through the second port included in the traffic access unit 42 of ONU2 b. The management message sent by ONU2b to management switch 2c does not pass through metropolitan area network 2a of area 2, and the management message is transmitted to management switch 2c through the physical line between monitoring unit 12 of ONU2b and management switch 2 c.

Alternatively, referring to fig. 4, for each of the above-mentioned ONU1b and ONU2b, the monitoring unit 1 in the ONU may include a signal processing unit 111, a data frame generating unit 112, a monitoring signal generating unit 113, a codec unit 114, and an optical conversion unit 115; the optical fiber interface unit 2 in the ONU includes a multiplexing unit 211 and a demultiplexing unit 212.

The signal processing unit 111 is provided with a first port and is connected to the data frame generating unit 112, the data frame generating unit 112 is further connected to the monitor signal generating unit 113 and the codec unit 114, the codec unit 114 is further connected to the optical conversion unit 115, and the optical conversion unit 115 is further connected to the multiplexing unit 211 and the demultiplexing unit 212 in the optical fiber interface unit 2. The multiplexing unit 211 and the demultiplexing unit 212 are both connected to the optical cross unit 2.

Optionally, when the ONU is a sender of the optical signal, the signal processing unit 111 is configured to receive the management packet through the first port, remove a packet header field of a preset type from a packet header of the management packet, obtain packet data in the management packet, and send the packet data to the data frame generating unit 112. Optionally, the preset type of the header field of the message may be a check field, etc.

The data frame generating unit 112 is configured to generate a data frame including the message data, and send the data frame to the codec unit 114.

The codec unit 114 is configured to encode the data frame into an electrical signal, and send the electrical signal to the optical conversion unit 115;

the optical conversion unit 115 is configured to convert the electrical signal into a first optical signal with a first wavelength, and send the first optical signal to the multiplexing unit 211 of the optical fiber interface unit 2.

The monitoring signal generating unit 113 is configured to periodically generate monitoring information and send the monitoring information to the data frame generating unit 112, and the data frame generating unit 112 is configured to generate a data frame including the monitoring information, add the message data to the data frame, and send the added data frame to the encoding and decoding unit 114.

Alternatively, the data frame may be an Optical Transport Network (OTN) data frame.

Optionally, the data frame generating unit 112 is configured to receive the monitoring information periodically generated by the monitoring signal generating unit 113, generate a second OTN data frame including the monitoring information, and add the message data to a target field of the second OTN data frame to obtain the first OTN data frame.

Optionally, the target field of the second OTN data frame may be 675 th byte to 3824 th byte in the second OTN data frame.

The multiplexing unit 211 is configured to receive the first optical signal from the optical conversion unit 115 and/or receive the second optical signal from the optical cross unit 3, and send the first optical signal and/or the second optical signal on an optical fiber.

Optionally, when receiving the first optical signal and the second optical signal simultaneously, the multiplexing unit 21 may combine the first optical signal and the second optical signal into one optical signal, and send the optical signal on the optical fiber.

Optionally, when the ONU is a receiver of an optical signal, the wavelength division unit 212 is configured to receive the optical signal from an optical fiber, distinguish a first optical signal with a first wavelength and/or a second optical signal with a second wavelength from the optical signal, send the first optical signal to the optical conversion unit 115 when the first optical signal is dropped, and send the second optical signal to the optical cross-unit 2 when the second optical signal is dropped.

The optical conversion unit 115 is configured to receive the first optical signal from the wavelength division unit 212, convert the first optical signal into an electrical signal, and send the electrical signal to the codec unit 114;

the encoding and decoding unit 114 is configured to decode the electrical signal to obtain a data frame, and send the data frame to the data frame generating unit 112, where the data frame includes message data of a management packet;

the data frame generating unit 112 is configured to extract the message data from the data frame, and send the message data to the signal processing unit 111;

the signal processing unit 111 is configured to encapsulate the message data into a management message, and send the management message to the management network through the first port.

Optionally, referring to fig. 4, the ONU may further include at least one buffer queue 116, where each buffer queue 116 is connected to the signal processing unit 111 and the data frame generating unit 112, and each buffer queue 116 corresponds to a priority of a packet, and the priorities of each buffer queue 116 are different;

the header of the management packet may be a V L AN header or AN IP header, and the signal processing unit 111 and the data frame generating unit 112 both support identifying priority fields in the V L AN header and the IP header.

When receiving a management packet, the signal processing unit 111 removes a preset packet header field in the management packet to obtain packet data, where the packet data further includes other packet header fields except the preset packet header field, and the other packet header fields include a priority field, so that the signal processing unit 111 can identify the priority field in the packet data, extract a priority from the priority field, and cache the packet data in a cache queue 116 corresponding to the priority, and the data frame generating unit 112 can select one cache queue according to the priority of each cache queue 116 through a preset policy, read the packet data from the selected cache queue, and generate a data frame based on the packet data. Alternatively, the first and second electrodes may be,

when extracting packet data from a data frame, the data frame generating unit 112 identifies a priority field in the packet data, extracts a priority from the priority field, and buffers the packet data in the buffer queue 116 corresponding to the priority, and the signal processing unit 111 may select one buffer queue according to the priority of each buffer queue 116 through a preset policy, read the packet data from the selected buffer queue, and encapsulate the packet data into a management packet.

The preset policy may make the signal processing unit 111 or the data frame generating unit 112 have a higher probability of selecting the buffer queue when the corresponding priority of the buffer queue is higher, so that the buffer queue with a higher priority is selected each time the signal processing unit 111 or the data frame generating unit 112 selects the buffer queue, and the probability of selecting the buffer queue is higher, so that the message data of the management message with a high priority is preferentially sent.

Optionally, referring to fig. 5, the ONU further includes a management unit 5, where the management unit 5 is configured to configure, in the optical cross-connect unit 3, a second wavelength corresponding to each second port in the service access unit 4, and configure preset policies in the signal processing unit 111 and the data frame generating unit 112.

The embodiment of the present application provides a communication method, which can be applied to the architecture shown in fig. 1. In this architecture, for ONUs deployed in any two different areas, ONU1b and ONU2b are referred to, respectively. ONU1b has a first port and at least one second port, ONU1b is connected to management network 1d in area 1 where ONU1b is located through the first port, and is connected to metropolitan area network 1a in area 1 through the at least one second port, ONU2b has a first port and at least one second port, and ONU2b is connected to management network 2d in area 2 where ONU2b is located through the first port, and is connected to metropolitan area network 2a in area 2 through the at least one second port.

In order to enable unified management of the management network 1d and the management network 2d, a controller 3 may be provided in the management network 1d or the management network 2 d. For example, the controller 3 may be disposed in the management network 1d, the controller 3 may establish a management channel between the management network 1d and the management network 2d, and the controller 3 may directly send a management packet to a device in the management network 1d to implement management of the device in the management network 1d, and may send a management packet to a device in the management network 2d through the management channel to implement management of the device in the management network 2 d. Alternatively, other devices in the management network 1d may send the management packet to the management network 2d through the management channel, or a device in the management network 2d may send the management packet to the management network 1d through the management channel.

The management channel may be a Transmission Control Protocol (TCP) connection, a User Datagram Protocol (UDP) connection, a hypertext transfer protocol (Http) connection, or the like between the management switch 1c of the management network 1d and the management switch 2c of the management network 2 d. Wherein the management network 1d includes a management switch 1c and a device connected to the management switch 1 c; the management network 2d includes a management switch 2c and devices connected to the management switch 2 c. The management channels include a channel between management switch 1c and ONU1b, an optical supervisory channel between ONU1b and ONU2b, and a channel between ONU2b and management switch 2 c.

After the controller 3 has established the management channel, it may send a management packet to the management network 2d through the following communication method, so as to implement management of the management network 2 d. Referring to fig. 6, the method includes:

step 301: the ONU1b receives the management packet transmitted from the management network 1d in the area 1 through the first port, and receives the traffic packet from the metropolitan area network 1a in the area 1 through the second port.

The management packet belongs to a management service, the service packet belongs to a user service, and the service packet is transmitted by a device connected to the metropolitan area network 1a of the area 1.

The controller 3 in the management network 1d or other devices in the management network 1d may send a management message to the management switch 1c, and the management switch 1c forwards the management message to the ONU1 b. The management packet forwarded by the management switch 1c to the ONU1b does not pass through the metropolitan area network 1a in the area 1, and the management packet is directly transmitted to the ONU1b through the physical line between the management switch 1c and the ONU1 b.

Referring to fig. 7, the monitoring unit 11 in the ONU1b includes a signal processing unit 11a, the signal processing unit 11a is provided with a first port, and the signal processing unit 11a receives the management message through the first port.

Still referring to fig. 7, ONU1b comprises a service access unit 41 and an optical cross-connect unit 31, wherein service access unit 41 comprises at least one second port, and wherein optical cross-connect unit 31 receives the service message via the second port in service access unit 41.

Step 302: ONU1b generates a data frame that includes the message data in the management message.

ONU1b periodically acquires monitoring information for monitoring the fiber connection between ONU1b and ONU2b and generates a data frame including the monitoring information.

In this step, the ONU1b may remove a preset packet header field from the management packet to obtain packet data, and after generating a data frame including the monitoring information, may add the packet data to a target field in the data frame, so that the data frame includes the packet data in the management packet.

Alternatively, the target field may be a field of 675 th byte to 3824 th byte in the data frame.

Optionally, the data frame may be an OTN data frame.

Referring to fig. 7, the monitoring unit 11 of the ONU1b further includes at least one buffer queue 116a, a data frame generating unit 112a, and a monitoring signal generating unit 113a, where each buffer queue 116a corresponds to a priority of a packet. The signal processing unit 111a is provided with a first port.

When receiving the management packet, the signal processing unit 111a may remove a preset packet header field from the management packet to obtain packet data, identify a priority field in the packet data, extract a priority from the priority field, and cache the packet data in a cache queue corresponding to the priority.

Optionally, the preset header field of the packet may be a check field.

The monitoring signal generating unit 113a may periodically obtain monitoring information, the data frame generating unit 112a may obtain the monitoring information, generate a second OTN data frame including the monitoring information, select one buffer queue from the at least one buffer queue 116a according to a preset policy, read message data from the selected buffer queue, add the message data to a field from 675 th byte to 3824 th byte of the second OTN data frame, to obtain a first OTN data frame, that is, a data frame generated by the ONU1b may be the first OTN data frame.

Step 303: ONU1b converts the data frame into a first optical signal at a first wavelength.

Referring to fig. 7, the monitoring unit 11 of ONU1b further includes a codec unit 114a and an optical conversion unit 115a, the ONU1b further includes an optical fiber interface unit 21, and the data frame generating unit 112a may send the first OTN data frame to the codec unit 114a after obtaining the first OTN data frame; the codec unit 114a converts the first OTN data frame into an electrical signal, and sends the electrical signal to the optical conversion unit 115 a; the optical conversion unit 115a converts the optical signal into a first optical signal having a first wavelength, and transmits the first optical signal to the multiplexing unit 211a included in the optical fiber interface unit 21.

Step 304: ONU1b converts the traffic message into a second optical signal at a second wavelength, the first wavelength and the second wavelength being different.

When receiving the service packet through the second port in the service access unit 41, the optical cross-connect unit 31 included in the ONU1b determines a second wavelength corresponding to the second port, converts the service packet into a second optical signal according to the second wavelength, and sends the second optical signal to the multiplexing unit 211a included in the optical fiber interface unit 21.

Optionally, step 304 and the

above steps

302 and 303 may be performed simultaneously, or step 302 and 303 may be performed first and then step 304 may be performed, or step 304 may be performed first and then steps 302 and 303 may be performed.

Step 305: ONU1b transmits the first optical signal and the second optical signal to ONU2b on an optical fiber.

The multiplexing unit 211a included in the optical fiber interface unit 21 receives the first optical signal and the second optical signal, and transmits the first optical signal and the second optical signal to the ONU2b on the optical fiber.

Optionally, if the multiplexing unit 211a receives the first optical signal and the second optical signal simultaneously, the multiplexing unit 211a combines the first optical signal and the second optical signal into one optical signal, and sends the optical signal to the ONU2b on the optical fiber. If the multiplexing unit 211a receives the first optical signal and the second optical signal at different times, the multiplexing unit 211a transmits the first optical signal to the ONU2b on the optical fiber when receiving the first optical signal, and transmits the second optical signal to the ONU2b on the optical fiber when receiving the second optical signal.

For ONU2b, ONU2b may receive an optical signal sent by ONU1b on the optical fiber, obtain a first optical signal with a first wavelength and a second optical signal with a second wavelength from the optical signal, convert the first optical signal into a data frame, extract message data from the data frame, encapsulate the message data into a management message, and send the management message to the management network 2d in area 2 through a first port included in the management message; the second optical signal is converted into a service packet, and the service packet is sent to the metropolitan area network 2a of the area 2 through the second port included in the service packet.

The optical signal may be the first optical signal and the second optical signal sent by the ONU1b, or a combined signal of the first optical signal and the second optical signal.

Optionally, referring to fig. 7, the ONU2b includes a monitoring unit 12, an optical fiber interface unit 22, an optical cross-connect unit 32, and a service access unit 42, where the service access unit 42 includes at least one second port, the monitoring unit 12 includes an optical conversion unit 115b, a codec unit 114b, a data frame generation unit 112b, at least one buffer queue 116b, and a signal processing unit 111b, and the signal processing unit 11b is provided with a first port.

The wavelength division unit 212b included in the optical fiber interface unit 22 receives the optical signal sent by the ONU1b from the optical fiber, and if the optical signal is a single optical signal obtained by combining the first optical signal and the second optical signal, distinguishes the first optical signal with the first wavelength and the second optical signal with the second wavelength from the single optical signal, sends the first optical signal to the optical conversion unit 115b, and sends the second optical signal to the optical cross-connect unit 32; transmitting the first optical signal to the optical conversion unit 115b if the optical signal is a first optical signal of a first wavelength; if the optical signal is a second optical signal of a second wavelength, the second optical signal is transmitted to the optical cross-unit 32.

The optical conversion unit 115b may convert the first optical signal into an electrical signal, and transmit the electrical signal to the codec unit 114 b; the codec unit 114b converts the electrical signal into a data frame, where the data frame may be a first OTN data frame, and sends the first OTN data frame to the data frame generating unit 112 b; the data frame generating unit 112b may extract the message data from the first OTN data frame, identify the priority field in the message data, extract the priority in the priority field, and buffer the message data in the buffer queue corresponding to the priority; the signal processing unit 111b may select one cache queue according to the priority corresponding to each cache queue through a preset policy, acquire the message data from the selected cache queue, generate a preset type of message header field according to the message data, add the message header field to the message data to obtain a management message, and send the management message to the management network 2d of the area 2 through the first port.

Optionally, when the header field of the preset type of packet is a check field, a Cyclic Redundancy Check (CRC) value of the packet data may be calculated, and the CRC value is used as the check field.

Optionally, the optical cross unit 32 receives the second optical signal, converts the second optical signal into a service packet, determines a second port corresponding to the second wavelength of the second optical signal, and sends the service packet to the metropolitan area network 2a of the area 2 through the second port included in the service access unit 42.

Optionally, the ONU2b may also send an optical signal to the ONU1b on an optical fiber, where the optical signal may be a first optical signal with a first wavelength, a second optical signal with a second wavelength, or a single optical signal obtained by combining the first optical signal and the second optical signal. The process of implementing ONU2b to transmit optical signals is the same as the process of implementing ONU1b to transmit optical signals, and will not be described in detail here. Referring to fig. 8, the ONU1b may also receive an optical signal by the following procedure.

Step 401: ONU1b receives the optical signal transmitted by ONU2b on the optical fiber, and acquires a first optical signal having a first wavelength and a second optical signal having a second wavelength from the optical signal.

The optical signal may be a first optical signal with a first wavelength, a second optical signal with a second wavelength, or a path of optical signal obtained by combining the first optical signal and the second optical signal.

Referring to fig. 7, the wavelength division unit 212a included in the optical fiber interface unit 21 receives the optical signal sent by the ONU2b from the optical fiber, and if the optical signal is a combined optical signal of the first optical signal and the second optical signal, distinguishes the first optical signal with the first wavelength and the second optical signal with the second wavelength from the optical signal, sends the first optical signal to the optical conversion unit 115a, and sends the second optical signal to the optical cross unit 31; transmitting the first optical signal to the optical conversion unit 115a if the optical signal is a first optical signal of a first wavelength; if the optical signal is a second optical signal of a second wavelength, the second optical signal is transmitted to the optical cross unit 31.

Step 402: the ONU1b converts the first optical signal into a data frame, extracts message data from the data frame, encapsulates the message data into a management message belonging to a management service, and transmits the management message to the management network 1d in the area 1 through the first port.

Referring to fig. 7, the optical conversion unit 115a may convert the first optical signal into an electrical signal, and transmit the electrical signal to the codec unit 114 a; the codec unit 114a converts the electrical signal into a first OTN data frame, and sends the first OTN data frame to the data frame generating unit 112 a; the data frame generating unit 112a extracts the message data from the first data frame, identifies the priority field in the message data, extracts the priority in the priority field, and buffers the message data in the buffer queue corresponding to the priority; the signal processing unit 11a selects one cache queue according to the priority corresponding to each cache queue by a preset policy, reads message data from the selected cache queue, generates a preset type of message header field according to the message data, adds the message header field to the message data to obtain a management message, and sends the management message to the management network 1d in the area 1 through the first port.

Step 403: the ONU1b converts the second optical signal into a service packet, and transmits the service packet to the metropolitan area network 1a of the area 1 through the second port.

Optionally, the optical cross module 31 receives the second optical signal, converts the second optical signal into a service packet, determines a second port corresponding to the second wavelength of the second optical signal, and sends the service packet to the metropolitan area network 1a of the area 1 through the second port in the service access unit 41.

Optionally, step 402 and step 403 may be performed simultaneously, or step 402 may be performed first and then step 403 is performed, or step 403 may be performed first and then step 402 is performed.

In this embodiment, the ONU1b includes a first port and a second port, receives a management packet sent by a management network in the area 1 through the first port and receives a traffic packet from a metropolitan area network in the area 1 through the second port, converts packet data in the management packet into a first optical signal with a first wavelength, converts the traffic packet into a second optical signal with a second wavelength, and sends the first optical signal and the second optical signal on the optical fiber. The ONU2b receives an optical signal from the optical fiber, distinguishes a first optical signal with a first wavelength and a second optical signal with a second wavelength from the optical signal, converts the first optical signal into message data, encapsulates the message data into a management message, converts the second optical signal into a service message, then sends the management message to the management network of the area 2 through a first port included therein, and sends the service message to the metropolitan area network of the area 2 through a second port included therein. Since the first wavelength is different from the second wavelength, and the different wavelengths correspond to different channels between ONU1b and ONU2b, in this way, the first optical signal corresponding to the management service and the second optical signal corresponding to the user service are transmitted on different channels at ONU1b side, so that the management channel for transmitting the management service and the service channel for transmitting the user service, which are established based on the two channels, can be separated, so that the normal transmission of the management service is not affected by an abnormality of the service channel.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating a communication apparatus 500 according to an embodiment of the present application. The apparatus 500 comprises:

a two-way optical supervisory channel (SC 2) Board 501, a fiber optic line interface (FIU) Board 502, a Universal Cross connection Board (UXCT) Board 503, and a branch service processing Board (TTX) Board 504, where the SC2 Board 501 is provided with a first port, and the TTX Board 504 is provided with at least one second port.

The FIU board 502 is connected to the SC2 board 501 and the UXCT board 503, respectively, and the UXCT board 503 is further connected to the TTX board 504.

The device 500 is located in an area, a first port in an SC2 board 501 is connected to a management network in the area, each second port in a TTX board 504 is connected to a metropolitan area network in the area, and a FIU board 502 is connected to ONUs in other areas through an optical fiber.

Optionally, the first port may be an ethernet interface.

The apparatus 500 is a hardware structure apparatus, and may be used to implement the functional units in the ONU described in fig. 2, fig. 4 and fig. 5. For example, those skilled in the art may recognize that the monitoring unit 1 in the ONU shown in fig. 2, 4 and 5 may be implemented by using an SC2 board 501, the optical fiber interface unit 2 in the ONU shown in fig. 2, 4 and 5 may be implemented by using an FIU board 502, the optical cross-connection unit 3 in the ONU shown in fig. 2, 4 and 5 may be implemented by using a UXCT board 503, and the service access unit 4 in the ONU shown in fig. 2, 4 and 5 may be implemented by using a TTX board 504.

Optionally, referring to fig. 9, the apparatus 500 may further include a System Control and Communication (SCC) Board 505, and the management unit 5 shown in fig. 5 may be implemented by using the SCC Board 505.

Optionally, referring to fig. 10, the SC2 board 501 may include a port physical layer (PHY) chip 5011, a first processor 5012, a second processor 5013, a Forward Error Correction (FEC) chip 5014, and a memory 5015, where the PHY chip 5011 is provided with a first port.

The PHY chip 5011, the first processor 5012, the second processor 5013, the FEC chip 5014, and the memory 5015 may be integrated on a single board (not shown in the figure). The PHY chip 5011 is connected to the memory 5015, the memory 5015 is also connected to the first processor 5012, the first processor 5012 is also connected to the second processor 5013 and the FEC chip 5014, respectively, and the FEC chip 5014 is also connected to the FIU board 502.

For the monitoring unit 1 in the ONU shown in fig. 4 and 5, the signal processing unit 111 in the monitoring unit 1 may be implemented using a PHY chip 5011, the data frame generating unit 112 may be implemented using a first processor 5012, the monitoring signal generating unit 113 may be implemented using a second processor 5013, the codec unit 114 may be implemented using an FEC chip 5014, and the at least one buffer queue 116 may be located in the memory 5015. The light conversion unit 115 is a common hardware component in the art, and for simplicity and clarity of implementation, the structure of the light conversion unit is not required to be described in this embodiment.

Optionally, the first processor 5012 may be a Central Processing Unit (CPU), a Field Programmable Gate Array (FPGA), or the like, and the second processor 5013 may be a CPU, or the like.

The PHY chip 5011 may have a model number RT L8211, and the FEC chip 5014 may have a model number IXF 30005.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of communication, the method comprising:

a first optical network node ONU receives a management message from a management network through a first port included in the first optical network node ONU and receives a service message from a metropolitan area network through a second port included in the first optical network node ONU, wherein the management message belongs to a management service, and the service message belongs to a user service;

the first ONU generates a data frame, wherein the data frame comprises message data in the management message;

the first ONU converts the data frame into a first optical signal with a first wavelength and converts the service message into a second optical signal with a second wavelength, wherein the first wavelength is different from the second wavelength;

the first ONU transmits the first optical signal and the second optical signal to a second ONU.

2. The method of claim 1, wherein the data frame is a first Optical Transport Network (OTN) data frame, and wherein the ONU generates the data frame, comprising:

the first ONU generates a second OTN data frame;

and the first ONU adds the message data in the management message to a target field of the second OTN data frame to obtain a first OTN data frame.

3. The method of claim 1 or 2, wherein prior to the first ONU generating a data frame, further comprising:

and the first ONU removes a preset type of message header field from the message header of the management message to obtain the message data in the management message.

4. The method of claim 3, wherein the predetermined type of header field is a check field.

5. The method of any of claims 1 to 4, wherein the first ONU comprises at least one buffer queue, and wherein each buffer queue of the at least one buffer queue corresponds to a priority;

after the first ONU receives the management packet from the management network through the first port included in the first ONU, the method further includes:

identifying a priority field of the management message, extracting the priority of the management message from the priority field, and caching message data of the management message into a cache queue corresponding to the priority of the management message;

the first ONU generates a data frame, comprising:

the first ONU selects one cache queue from the at least one cache queue through a preset strategy according to the priority corresponding to each cache queue;

and the first ONU acquires the message data from the selected cache queue and generates a data frame comprising the acquired message data.

6. The method of any of claims 1 to 5, wherein the first port is an Ethernet interface.

7. A communications apparatus, the apparatus comprising: the optical fiber monitoring system comprises a monitoring unit, an optical cross unit, a service access unit and an optical fiber interface unit, wherein the monitoring unit is provided with a first port, and the service access unit is provided with a second port;

the monitoring unit is used for receiving a management message from a management network through the first port, wherein the management message belongs to management service, and a data frame is generated and comprises message data in the management message; converting the data frame into a first optical signal at a first wavelength;

the service access unit is used for receiving a service message from a metropolitan area network through the second port, wherein the service message belongs to a user service;

the optical cross unit is configured to convert the service packet into a second optical signal with a second wavelength, where the first wavelength is different from the second wavelength;

the optical fiber interface unit is configured to send the first optical signal and the second optical signal to a second optical network node ONU.

8. The apparatus of claim 7, wherein the data frame is an OTN data frame, and the monitoring unit is configured to:

generating a second OTN data frame;

and adding the message data in the management message to a target field of the second OTN data frame to obtain a first OTN data frame.

9. The apparatus of claim 7 or 8, wherein the monitoring unit is further configured to:

and removing a preset type of message header field from the message header of the management message to obtain the message data in the management message.

10. The apparatus of claim 9, wherein the predetermined type of header field is a check field.

11. The apparatus according to any one of claims 7 to 10, wherein the monitoring unit comprises at least one buffer queue, each buffer queue of the at least one buffer queue corresponding to a priority;

the monitoring unit is used for:

selecting one buffer queue from the at least one buffer queue through a preset strategy according to the priority corresponding to each buffer queue;

and acquiring message data from the selected cache queue, and generating a data frame comprising the acquired message data.

12. The apparatus of any of claims 7 to 11, wherein the first port is an ethernet interface.

13. A communication system, the system comprising: a first optical network node ONU and a second ONU;

the first ONU is used for receiving a management message from a management network of an area where the first ONU is located through a first port of the first ONU and receiving a service message from a metropolitan area network of the area where the first ONU is located through a second port of the first ONU, wherein the management message belongs to a management service, and the service message belongs to a user service; generating a data frame, wherein the data frame comprises message data in the management message; converting the data frame into a first optical signal with a first wavelength and converting the service message into a second optical signal with a second wavelength, wherein the first wavelength is different from the second wavelength; combining the first optical signal and the second optical signal into a path of optical signal, and sending the path of optical seat number to the second ONU;