WO2016015216A1

WO2016015216A1 - Method and apparatus for device registration and wavelength switching in ethernet passive optical network system

Info

Publication number: WO2016015216A1
Application number: PCT/CN2014/083210
Authority: WO
Inventors: 叶志成; 李胜平; 林薇
Original assignee: 华为技术有限公司
Priority date: 2014-07-29
Filing date: 2014-07-29
Publication date: 2016-02-04
Also published as: CN105830369A; CN105830369B

Abstract

Disclosed are a method and an apparatus for device registration and wavelength switching in an Ethernet passive optical network system. The method comprises: sending a windowing message to an ONU; receiving a registration request message that is sent by the ONU according to the windowing message and used for requesting registration, the registration request message carrying wavelength information of the ONU, and the wavelength information comprising a registration downlink wavelength adopted by the ONU for receiving the windowing message; sending the registration message to the ONU according to the registration request message, the registration message comprising a logical link identifier (LLID) allocated by an OLT to the ONU; and receiving a registration acknowledgment message that is sent by the ONU according to the registration message and used for acknowledging completion of the registration. By means of the method and apparatus according to embodiments of the present invention, device registration and wavelength switching can be implemented in an Ethernet passive optical network system that adopts multiple downlink wavelengths and one uplink wavelength for communication, the process can be simplified, and the service volume of the system is increased.

Description

Method and device for device registration and wavelength switching in Ethernet passive optical network system

The present invention relates to the field of optical communications, and more particularly to a method and apparatus for device registration and wavelength switching in an Ethernet passive optical network system in the field of optical communications. Background technique

With the rapid development of optical communication technology, Passive Optical Network ("PON") systems are increasingly used in optical communication technologies. The PON system may include Time Division Multiplexing (TDM) PON, Gigabit Passive Optical Network (GPON), and Ethernet Passive Optical Network. , referred to as 'ΈΡΟΝ'), Time Wavelength Division Multiplexing (TWDM) PON, Point to Point (PtP) Wavelength Division Multiplexing (Wavelength Division Multiplexing, referred to as "WDM") PON and so on.

For each type of PON system, the PON system may include: an Optical Line Terminal ("OLT") located at the central office, and an Optical Distribution Network (hereinafter referred to as an Optical Distribution Network). "ODN"), and an Optical Network Unit ("ONU") / Optical Network Terminal ("A" for short), where the ONU can be used to refer to the ONU and/or ONT.

In order to increase the capacity of the PON system, the ITU Telecommunication Standardization Sector ("ITU-T", in which the International Telecommunication Union is referred to as "ITU") proposes a type called Next Generation Ethernet. A communication system of Next Generation-EPON (NG-EPON), which may use a network architecture in which multiple downlink wavelengths and one upstream wavelength are used for communication. However, in the NG-EPON system, there is no existing device registration and wavelength switching method applicable to the network architecture.

Therefore, in the next-generation Ethernet passive optical network system, how to perform device registration and wavelength switching is an urgent problem to be solved. Summary of the invention

In view of this, embodiments of the present invention provide a method and apparatus for device registration and wavelength switching in an Ethernet passive optical network system, which are capable of communicating Ethernet passive light using multiple downlink wavelengths and one upstream wavelength. Device registration and wavelength switching in the network system.

In a first aspect, a method for device registration in an EPON system of an Ethernet passive optical network is provided. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. Wavelength communication, wherein the method includes: sending a windowing message to the ONU; receiving a registration request message for requesting registration sent by the ONU according to the windowing message, the registration request message carrying wavelength information of the ONU, the wavelength The information includes a registered downlink wavelength used by the ONU to receive the windowing message; sending, by the registered downlink wavelength, a registration message to the ONU, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; and receiving the ONU A registration confirmation message sent to confirm the registration is completed according to the registration message.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the registration message further includes wavelength confirmation information, where the wavelength confirmation information is used to indicate that the OLT confirms the wavelength information.

With reference to the first aspect, the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the discovery information field of the registration request message includes the wavelength information; or the registration request message includes A wavelength information field, the wavelength information field including the wavelength information.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the wavelength information further includes downlink wavelength adjustment capability information of the ONU, where The downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

In a second aspect, a method for device registration in an EPON system of an Ethernet passive optical network is provided. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength communication is performed, where the method includes: receiving a windowing message sent by the OLT; sending, according to the windowing message, a registration request message for requesting registration, the registration request message carrying wavelength information of the ONU, where The wavelength information includes a registration downlink wavelength used by the ONU to receive the windowing message; receiving a registration message sent by the OLT according to the registration request message, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; The registration message sends a registration to the OLT to confirm the completion of the registration. Recognize the news.

In conjunction with the second aspect, in a first possible implementation manner of the second aspect, the registration message further includes wavelength confirmation information, where the wavelength confirmation information is used to indicate that the OLT confirms the wavelength information.

With reference to the second aspect, the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the discovery information field of the registration request message includes the wavelength information; or the registration request message includes A wavelength information field, the wavelength information field including the wavelength information.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the wavelength information further includes downlink wavelength adjustment capability information of the ONU, where The downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

In a third aspect, a method for wavelength switching in an EPON system of an Ethernet passive optical network is provided. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and an uplink. The wavelength communication is performed, where the method includes: the change request message is used to indicate that the ONU switches to the target downlink wavelength, and the wavelength switch request message includes target wavelength information used to indicate the target downlink wavelength, and is used to indicate downlink wavelength switching. The switching time information of the start and end time; receiving, on the uplink wavelength channel, a wavelength switching confirmation message sent by the ONU according to the wavelength switching request message, where the wavelength switching confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switching; And transmitting, in the start and end time, a wavelength switching 4 吏 message to the ONU on the target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switching authorization message is used to authorize the ONU; when the ONU is in the start and end time When successfully switching to the target downstream wavelength, on the uplink The ONU receiving the long wavelength channel switching complete message based on the message transmission right by 4 wavelength switching, wavelength switching complete message to indicate the success of the handover to the target ONU downstream wavelength within the start and end time.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the method further includes: sending, on the target downlink wavelength channel, a wavelength switching success message to the ONU according to the wavelength switching completion message, the wavelength switching The success message is used to indicate that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the method further includes: when the wavelength switching completion message sent by the ONU is not received within the start and end time, only in the And transmitting, by the source downlink downlink channel, the wavelength switching authorization message to the ONU; receiving, on the uplink wavelength channel, a wavelength switching incomplete message sent by the ONU according to the wavelength switching authorization message, where the wavelength switching incomplete message is used to indicate the The ONU did not successfully switch to the target downstream wavelength during the start and end time.

With the second possible implementation of the third aspect, in a third possible implementation manner of the third aspect, the method further includes: switching, according to the wavelength, an incomplete message to the ONU on the source downlink wavelength channel The wavelength switching unsuccessful message is sent, and the wavelength switching unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

With reference to the third aspect, or any one of the first to the third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the wavelength switching request message, The at least one of the wavelength switch acknowledgement message, the wavelength switch 4 吏 message, and the wavelength switch complete message is a multipoint control protocol MPCP message or an operation management maintenance OAM message.

In a fourth aspect, a method for wavelength switching in an EPON system of an Ethernet passive optical network is provided. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength is communicated, wherein the method includes: receiving, on the source downlink wavelength channel, a wavelength switching request message sent by the optical line terminal OLT, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and the wavelength switching The request message includes target wavelength information for indicating the downlink wavelength of the target, and switching time information for indicating the start and end time of the downlink wavelength switching. On the uplink wavelength channel, the wavelength switching request message is sent to the OLT according to the wavelength switching request message. Acknowledgement message, the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switching; when the ONU successfully switches to the target downlink wavelength in the start and end time, receiving the target downlink of the OLT corresponding to the target downlink wavelength Wavelength switching on the wavelength channel 4 And the wavelength switching message is used to indicate the ONU. The wavelength switching completion message is sent to the OLT according to the wavelength switching authorization message, where the wavelength switching completion message is used to indicate the ONU. Successfully switch to the target downstream wavelength during the start and end time.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the method further includes: receiving, on the target downlink wavelength channel, a wavelength switching success message sent by the OLT according to the wavelength switching completion message, the wavelength The handover success message is used to indicate that the OLT confirms that the ONU downlink wavelength handover is successful.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the method further includes: When the ONU fails to switch to the target downlink wavelength within the start and end time, after the start and end time expires, the wavelength switching authorization message sent by the OLT on the source downlink wavelength channel is received; on the uplink wavelength channel. The wavelength switch incomplete message is sent to the OLT according to the wavelength switching message, and the wavelength switch incomplete message is used to indicate that the ONU does not successfully switch to the target downlink wavelength within the start and end time.

In conjunction with the second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the method further includes: receiving, on the source downlink wavelength channel, the OLT to perform an incomplete message according to the wavelength switching The wavelength switching unsuccessful message is sent, and the wavelength switching unsuccessful message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful.

With reference to the fourth aspect, or any one of the first to the third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the wavelength switching request message, The at least one of the wavelength switch acknowledgement message, the wavelength switch 4 吏 message, and the wavelength switch complete message is a multipoint control protocol MPCP message or an operation management maintenance OAM message.

The fifth aspect provides an optical line terminal OLT in an EPON system of an Ethernet passive optical network, where the EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one The EPON system further includes an optical network unit ONU, and the OLT communicates with the ONU based on a plurality of downlink wavelengths and an uplink wavelength, where the OLT includes: a sending module, configured to send the ONU to the ONU a receiving message, configured to receive, by the ONU, a registration request message for requesting registration sent by the ONU according to the windowing message sent by the sending module, where the registration request message carries wavelength information of the ONU, where the wavelength information includes the ONU Receiving the registered downlink wavelength used by the windowing message; wherein the sending module is further configured to: send, according to the registration request message received by the receiving module, a registration message to the ONU, where the registration message includes the OLT allocating the ONU Logical link tag LLID; the receiving module is further configured to: receive the ONU sent according to the sending module The registration confirmation message sent by the registration message to confirm the completion of the registration.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the registration message sent by the sending module further includes wavelength confirmation information, where the wavelength confirmation information is used to indicate that the OLT confirms the wavelength information.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the discovery information field of the registration request message received by the receiving module includes the wavelength information; or The registration request message received by the receiving module includes a wavelength information field, the wavelength The information field includes the wavelength information.

With reference to the fifth aspect, or any one of the possible implementation manners of the first or the second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the receiving module receives the The wavelength information further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, and each downlink wavelength. Adjust the interval adjustment time and the downstream wavelength adjustment speed.

The sixth aspect provides an optical network unit ONU in an EPON system of an Ethernet passive optical network, where the EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one Upstream wavelength communication, the EPON system further includes an optical line terminal OLT, and the OLT communicates with the ONU based on multiple downlink wavelengths and an uplink wavelength, where the ONU includes: a receiving module, configured to receive the OLT sending a sending message, configured to send, according to the windowing message received by the receiving module, a registration request message for requesting registration to the OLT, where the registration request message carries wavelength information of the ONU, where the wavelength information includes the ONU Receiving the registered downlink wavelength used by the windowing message; the receiving module is further configured to: receive a registration message sent by the OLT according to the registration request message sent by the sending module, where the registration message includes the OLT allocated to the ONU The logical link tag LLID; the sending module is further configured to: according to the registration message received by the receiving module OLT transmits a registration acknowledgment message to complete the registration acknowledgment.

In conjunction with the sixth aspect, in a first possible implementation manner of the sixth aspect, the registration message received by the receiving module further includes wavelength confirmation information, where the wavelength confirmation information is used to indicate that the OLT confirms the wavelength information.

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the discovery information field of the registration request message sent by the sending module includes the wavelength information; or The registration request message sent by the sending module includes a wavelength information field, and the wavelength information field includes the wavelength information.

With reference to the sixth aspect or the first or the second possible implementation manner of the sixth aspect, in the third possible implementation manner of the sixth aspect, the wavelength information sent by the sending module further includes a downlink wavelength of the ONU Adjusting capability information, the downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed. The seventh aspect provides an optical line terminal OLT in an EPON system of an Ethernet passive optical network, where the EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one The uplink wavelength is used for communication, where the OLT includes: a message, the wavelength switch request message is used to indicate that the ONU switches to the target downlink wavelength, and the wavelength switch request message includes target wavelength information for indicating the target downlink wavelength, and a switching time information indicating a start and end time of the downlink wavelength switching; a receiving module, configured to receive, on the uplink wavelength channel, a wavelength switching confirmation message sent by the ONU according to the wavelength switching request message sent by the sending module, the wavelength The switching acknowledgement message is used to indicate that the ONU determines to perform the downlink wavelength switching. The sending module is further configured to: send the wavelength switch 4 to the ONU on the target downlink wavelength channel corresponding to the target downlink wavelength during the start and end time. a weighting message, the wavelength switching authorization message is used to authorize the ONU; The module is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive a wavelength switch completion message sent by the ONU according to the wavelength switching authorization message sent by the sending module, on the uplink wavelength channel, The wavelength switch completion message is used to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the sending module is further configured to: send, by using the wavelength switching completion message, a wavelength switching success message to the ONU on the target downlink wavelength channel, where The wavelength switching success message is used to indicate that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

With reference to the seventh aspect, in a second possible implementation manner of the seventh aspect, the sending module is further configured to: when the wavelength switching complete message sent by the ONU is not received within the start and end time, only the source The wavelength switching authorization message is sent to the ONU on the downlink wavelength channel; the receiving module is further configured to: receive, on the uplink wavelength channel, a wavelength switching incomplete message sent by the ONU according to the wavelength switching authorization message, where the wavelength switching is not completed. The message is used to indicate that the ONU did not successfully switch to the target downstream wavelength during the start and end time.

With reference to the second possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, the sending module is further configured to: switch, according to the wavelength, an uncompleted message direction on the source downlink wavelength channel The ONU sends a wavelength switch unsuccessful message, and the wavelength switch unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

Combining any of the first to third possible implementations of the seventh aspect or the seventh aspect A possible implementation manner, in a fourth possible implementation manner of the seventh aspect, the at least one of the wavelength switching request message, the wavelength switching confirmation message, the wavelength switching information, and the wavelength switching completion message The message is a multipoint control protocol MPCP message or an operation management maintenance OAM message.

The eighth aspect provides an optical network unit ONU in an EPON system of an Ethernet passive optical network, where the EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one The uplink wavelength is used for communication, where the ONU includes: a receiving module, configured to receive a wavelength switching request message sent by the optical line terminal OLT on the source downlink wavelength channel, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink a wavelength, and the wavelength switching request message includes target wavelength information for indicating the target downlink wavelength, and switching time information for indicating a start and end time of the downlink wavelength switching; and a sending module, configured to, according to the uplink wavelength channel, The wavelength switch request message received by the receiving module sends a wavelength switch confirmation message to the OLT, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch. The receiving module is further configured to: when the ONU is in the Successfully switch to the target downstream wavelength during the start and end time Receiving, by the OLT, a wavelength switching 4 吏 message sent on the target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switching 4 吏 right message is used to authorize the ONU; the sending module is further configured to: The wavelength switching completion message is sent to the OLT according to the wavelength switching authorization message received by the receiving module, where the wavelength switching completion message is used to indicate that the ONU successfully switches to the target downlink wavelength within the starting and ending time.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the receiving module is further configured to: receive, on the target downlink wavelength channel, a wavelength switching success message sent by the OLT according to the wavelength switching completion message, The wavelength switching success message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is successful.

With reference to the eighth aspect, in a second possible implementation manner of the eighth aspect, the receiving module is further configured to: when the ONU fails to successfully switch to the target downlink wavelength within the start and end time, after the start and end time expires Receiving the wavelength switching authorization message sent by the OLT only on the source downlink wavelength channel; the sending module is further configured to: send, on the uplink wavelength channel, a wavelength switching incomplete message to the OLT according to the wavelength switching authorization message, The wavelength switch incomplete message is used to indicate that the ONU did not successfully switch to the target downlink wavelength within the start and end time.

In conjunction with the second possible implementation of the eighth aspect, in a third possible implementation manner of the eighth aspect, the receiving module is further configured to: receive the OLT according to the source downlink channel The wavelength switching unsuccessful message is sent to the wavelength switch unsuccessful message, and the wavelength switching unsuccessful message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful.

With reference to the eighth aspect, or any one of the first to the third possible implementation manners of the eighth aspect, in a fourth possible implementation manner of the eighth aspect, the wavelength switching request message, The at least one of the wavelength switch acknowledgement message, the wavelength switch 4 吏 message, and the wavelength switch complete message is a multipoint control protocol MPCP message or an operation management maintenance OAM message.

Based on the foregoing technical solution, a method and a device for registering a device in an Ethernet passive optical network system according to an embodiment of the present invention, by registering a downlink wavelength in a registration request message sent by an optical network unit to an optical line terminal, so that the optical line terminal The downlink wavelength used by the optical network unit can be determined, thereby enabling device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, whereby the optical network unit and the light The data communication can be performed between the line terminals. On the other hand, the method and device for wavelength switching in the Ethernet passive optical network system according to the embodiment of the present invention indicate the target wavelength information and the switching time information to the optical network unit through the optical line terminal. And performing downlink wavelength switching between the target downlink optical network unit and the target downlink optical network unit in the start and stop time of the downlink wavelength indication indicated by the optical line terminal, and preventing the optical line terminal from facing the optical network on multiple downlink wavelength channels. The unit performs synchronous authorization, which simplifies the downlink The wavelength switching process reduces the probability of switching errors and increases the service capacity of the system. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

2 is a schematic flowchart of a method for registering a device according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a registration request message according to an embodiment of the present invention; FIG. 4 is a registration message according to an embodiment of the present invention; Schematic diagram of the structure;

FIG. 5 is a schematic flowchart of a method for registering a device according to another embodiment of the present invention; FIG. 6 is a schematic flowchart of a method for registering a device according to another embodiment of the present invention; FIG. Schematic flow chart of a method for wavelength switching; 8A and 8B are schematic structural diagrams of an MPCP protocol-based adjustment control message and an adjustment response message according to an embodiment of the present invention;

9A and 9B are schematic structural diagrams of an OAM-based adjustment control message and an adjustment response message according to an embodiment of the present invention;

FIG. 10 is still another schematic flowchart of a method for wavelength switching according to an embodiment of the present invention; FIG. 11 is another schematic flowchart of a method for wavelength switching according to an embodiment of the present invention; FIG. 13 is another schematic flowchart of a method for wavelength switching according to another embodiment of the present invention; FIG. 14 is a wavelength switching method according to another embodiment of the present invention. FIG. 15 is a schematic flowchart of a method for wavelength switching according to an embodiment of the present invention; FIG. 16 is a schematic block diagram of an optical line terminal according to an embodiment of the present invention;

17 is a schematic block diagram of an optical network unit according to an embodiment of the present invention;

FIG. 18 is a schematic block diagram of an optical line terminal according to another embodiment of the present invention; FIG.

FIG. 19 is a schematic block diagram of an optical network unit according to another embodiment of the present invention; FIG.

20 is a schematic block diagram of an optical line terminal according to still another embodiment of the present invention;

FIG. 21 is a schematic block diagram of an optical network unit according to still another embodiment of the present invention; FIG.

FIG. 22 is a schematic block diagram of an optical line terminal according to still another embodiment of the present invention; FIG.

FIG. 23 is a schematic block diagram of an optical network unit according to still another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

FIG. 1 shows an application scenario provided by an embodiment of the present invention. As shown in FIG. 1, the EPON system may include an EPON OLT and one or more EPON ONUs, and the EPON OLT may be connected to the one or more EPON ONU fibers through an optical splitter ("OS"). The EPON OLT communicates with the EPON ONU based on multiple downlink wavelengths and one uplink wavelength.

The EPON OLT is, for example, an NG-EPON OLT, or the EPON OLT can be other

OLT, the OLT has multiple transmit wavelengths and one receive wavelength. As shown in Figure 1, the EPON The ONU is, for example, n EPON ONUs, that is, EPON ONU 1 to EPON ONU n, where n is a natural number; the EPON ONU has an adjustable receiving wavelength but a fixed transmission wavelength, and the EPON ONU may include one or more 1G EPON ONUs, for example. Or a plurality of 10G EPON ONUs, one or more NG EPON ONUs, and the like, but the embodiment of the present invention is not limited thereto.

It should be understood that in the embodiment of the present invention, data or optical signals carrying data are transmitted from the OLT to

The transmission direction of the ONT/ONU is called the downlink direction. Correspondingly, the channel through which the OLT sends optical signals to the ONT/ONU is also called the downstream wavelength channel. Similarly, the transmission of data or optical signals carrying data from the ONT/ONU to the OLT is transmitted. The direction is called the uplink direction; accordingly, the channel through which the ONT/ONU sends optical signals to the OLT is also called the upstream wavelength channel.

It should be understood that the embodiment of the present invention is only described by taking an EPON system with four-wave downlink single-wave uplink as an example, that is, an EPON system having four downlink wavelength channels and one uplink wavelength channel is taken as an example, but the present invention does not The method and device for device registration and wavelength switching according to the embodiments of the present invention are also applicable to other EPON systems having multiple downlink wavelength channels and one uplink wavelength channel, and multiple downlink wavelength channels and multiple EPON system with upstream wavelength channel. Further, for convenience of description, the ONU will be described below in place of the ONT and/or the ONU, but the present invention is not limited thereto.

FIG. 2 is a schematic flowchart of a method 100 for device registration in an EPON system according to an embodiment of the present invention. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths. In communication with an upstream wavelength, the method 100 can be performed by an OLT, for example, the method 100 is performed by an NG-EPON OLT. As shown in FIG. 2, the method 100 includes:

S110, sending a windowing message to the ONU;

S120, receiving a registration request message for requesting registration sent by the ONU according to the windowing message, where the registration request message carries wavelength information of the ONU, where the wavelength information includes a registered downlink wavelength used by the ONU to receive the windowing message. ;

S130, sending a registration message to the ONU by using the registration downlink wavelength, where the registration message includes a Logical Link Identifier ("LLID") allocated by the OLT for the ONU;

S140. Receive a registration confirmation message sent by the ONU according to the registration message to confirm completion of registration.

Specifically, an EPON system that uses multiple downstream wavelengths and one upstream wavelength for channeling For example, the OLT broadcasts a windowing message to the ONU to ask if there is a newly joined ONU that needs to be registered. If the newly added ONU needs to be registered at this time, when the ONU receives the windowing message sent by the OLT broadcast, it can broadcast a registration request message to the OLT, and the registration request message is used to request registration from the OLT, and the The registration request message carries wavelength information, and the wavelength information can indicate the registered downlink wavelength used by the ONU to receive the windowing message. After receiving the wavelength information sent by the ONU, the OLT may send a registration message including the LLID to the ONU. After receiving the registration message sent by the OLT, the ONU may perform corresponding registration processing, and may send a registration confirmation message to the OLT. For indicating to the OLT that the ONU completes registration, in the EPON system, data communication can be performed between the OLT and the ONU.

Therefore, the device registration method in the Ethernet passive optical network system according to the embodiment of the present invention indicates that the downlink wavelength is registered in the registration request message sent by the optical network unit to the optical line terminal, so that the optical line terminal can determine the optical network. The downlink wavelength used by the unit enables device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, whereby the optical network unit and the optical line terminal can Data communication.

Specifically, in S110, the OLT transmits a windowing message to the ONU. For example, the OLT can send a windowing message to the ONU by means of a broadcast. The windowing message is, for example, a GATE message based on a Multi-Point Control Protocol (MPCP), and the GATE message is used to authorize the ONU so that the ONU receiving the GATE message can be immediately or Send information within the specified time.

In the embodiment of the present invention, the GATE message may include a source address, a destination address, and a message content, and the message content may include, for example, at least one of the following information: Grant information, Sync Time information, and Discovery Information, but the present invention is not limited thereto.

In S120, the OLT receives the registration request message sent by the ONU according to the windowing message, and the wavelength information carried by the registration request message includes the registered downlink wavelength used by the ONU to receive the windowing message.

In the embodiment of the present invention, after the ONU performs self-calibration, the receiving wavelength may be adjusted to one of a plurality of downlink wavelengths, that is, the ONU receives the registered downlink wavelength used by the windowing message, and may report the registered downlink wavelength to the ONU. OLT for device registration.

In the embodiment of the present invention, optionally, the wavelength information further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: The long adjustment interval, the number of downstream wavelengths, the wavelength adjustment range of the tunable filter, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

That is, in the embodiment of the present invention, the ONU can report the downlink wavelength adjustment capability information to the OLT, so that the OLT can completely learn the related information of the ONU for subsequent operations. For example, the OLT can determine the target downlink wavelength of the downlink wavelength switching according to the downlink wavelength adjustment capability information of the ONU.

In the embodiment of the present invention, the registration request message is, for example, an MPCP-based REGISTER_REQ message, the REGISTER_REQ message is used to request registration from the OLT, and the REGISTER_REQ message carries the wavelength information. In the embodiment of the present invention, the REGISTER_REQ message may include a source address, a destination address, and a message content. The message content may include at least one of the following information in addition to the wavelength information: Waiting 4 is authorized (Pending Grants) Information, Discovery Information, Laser On Time information, and Laser Off Time information, but the present invention is not limited thereto.

In the embodiment of the present invention, the wavelength information may be carried by extending the frame structure of the REGISTER_REQ message. Optionally, the discovery information field (Field) of the registration request message includes the wavelength information; or the registration request message includes wavelength information (Wavelength Information) i or the wavelength information i or includes the wavelength information.

The above registration request message will be described separately in conjunction with Figs. 3A and 3B.

FIG. 3A shows a frame structure of a registration request REGISTER_REQ message provided by an embodiment of the present invention, where a discovery information field of the REGISTER_REQ message carries the wavelength information. As shown in FIG. 3A, the opcode (Opcode) 0001 indicates that the media access control (Media Access Control, referred to as "MAC") function is pause (PAUSE), that is, the message with the operation code 0001 is a pause (PAUSE) message; The message with the operation code 0002 is a window open (GATE) message; the message with the operation code 0003 is a report (REPORT) message; the message with the operation code 0004 is a registration request (REGISTER_REQ) message; the message with the operation code 0005 is The REGISTER message; the message with the operand 0006 is a REGISTER_ACK message.

The REGISTER_REQ message may include: a 6-byte Destination Address ("DA") field, a 6-byte Source Address ("SA") field, and 2 bytes. Length (Length) / Type (Type) field, 2 bytes Opcode field, 4-byte timestamp field, 1 byte flag (Flags) field, 1 byte Pending Grants field, 2 bytes of discovery The Discovery Information field, the 1-byte Laser On Time field, the 1-byte Laser Off Time field, the 32-byte padding field, and 4 Byte's Frame Check Sequence (FCS) field.

The bits of the Discovery Information field may indicate 1G uplink capability information, 10G uplink capability information, 1G registration attempt information, or 10G registration attempt information. In addition, the bits of the Discovery Information field may be used to indicate the registered downlink wavelength, and may also be It is used to indicate one or more of the following wavelength information: downlink wavelength adjustment interval information, downlink wavelength number information, downlink wavelength adjustment range information, and adjustment time information of the downlink wavelength per adjustment interval. That is, in the embodiment of the present invention, the Discovery Information field of the REGISTER_REQ message may be extended, so that the reserved bit of the Discovery Information field may also be used to indicate the wavelength information of the ONU.

FIG. 3B shows another frame structure of the registration request REGISTER_REQ message provided by the embodiment of the present invention, wherein the registration request REGISTER_REQ message with the operation code 0004 further includes, for example, a 2-byte wavelength information (Wavelength Information) field. One or more of the wavelength information: the downlink wavelength adjustment interval information, the downlink wavelength number information, the downlink wavelength adjustment range information, and the adjustment time information of the downlink wavelength per adjustment interval. That is, in the embodiment of the present invention, a Wavelength Information field may be newly added in the REGISTER_REQ message, and the bit of the Wavelength Information field is used to indicate the wavelength information of the ONU.

It should be understood that the embodiment of the present invention is only described by taking the frame structure shown in FIG. 3A and FIG. 3B as an example, but the present invention is not limited thereto. For example, the wavelength information of the ONU may also be carried in other domains of the REGISTER_REQ message or other pre- In the remaining field; for example, the wavelength information field may have more bytes and the like.

In S130, the OLT may send a registration message to the ONU by broadcasting according to the registration request message, where the registration message includes an LLID allocated by the OLT to the ONU.

It should be understood that, in the embodiment of the present invention, the LLID is a digital identifier assigned by the EPON system to the logical link, and each logical link is assigned a different LLID. In the EPON system, the OLT can identify which ONU the received frame is sent by the LLID. Similarly, the OLT can also send the frame to the corresponding ONU by modifying the LLID in the frame. Thus, it can be established Correspondence between the OLT and the ONU, and communication.

In the embodiment of the present invention, optionally, the registration message further includes wavelength confirmation information, where the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information. Specifically, for example, the wavelength confirmation information may include registration downlink wavelength confirmation information for instructing the OLT to confirm the registered downlink wavelength. For another example, the wavelength confirmation information may further include downlink wavelength adjustment capability confirmation information, where the downlink wavelength adjustment capability confirmation information includes confirmation of at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, and a tunable filter. The wavelength adjustment range, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

Specifically, in the embodiment of the present invention, the registration message is, for example, an MPCP-based REGISTER message, and the REGISTER message is used to allocate an LLID for the ONU that is registered by the certificate. In the embodiment of the present invention, the REGISTER message may include a source address, a destination address, and a message content. The message content may include at least one of the following information in addition to the LLID: Sync Time information. Echo of Pending Grants information, Target Laser On Time information, Target Laser Off Time information, and Echo of Wavelength Information, but the present invention Not limited to this.

In the embodiment of the present invention, the wavelength confirmation information may be carried by extending the frame structure of the REGISTER message. The registration REGISTER message including the wavelength confirmation information will be described in detail below by taking the frame structure shown in Fig. 4 as an example.

As shown in Figure 4, the message with the operation code 0005 is a REGISTER message.

The REGISTER message may include, for example, a 6-byte Destination Address ("DA") field, a 6-byte Source Address ("SA") field, and a length of 2 bytes. ( Length ) / Type field, 2-byte opcode (Opcode) field, 4-byte timestamp (Timestamp) field, 2-byte Assigned Port field, 1 word Flags (Flags) field, 2-byte Sync Time field, 1-byte Echoed Pending Grants field, 1-byte target laser on time (Target Laser On Time) ) domain, 1 byte target Laser Off Time field, 2 bytes of Echoed Wavelength Information field, 32 bytes of padding field, and 4 bytes Frame Check Sequence (referred to as "FCS").

Wherein, each bit of the Echoed Wavelength Information field can represent a downstream wavelength The confirmation information, the downlink wavelength adjustment interval confirmation information, the downlink wavelength number confirmation information, the downlink wavelength adjustment range confirmation information, and the adjustment time confirmation information of the downlink wavelength per adjustment interval.

It should be understood that the embodiment of the present invention is only described by taking the frame structure shown in FIG. 4 as an example, but the present invention is not limited thereto. For example, the wavelength confirmation information may also be carried in other messages, or carried in a REGISTER message. In other domains or other reserved fields.

In S140, the OLT receives a registration confirmation message sent by the ONU according to the registration message, and the registration confirmation message is used to confirm that the ONU completes registration.

It should be understood that, during the time when the ONU performs related registration processing according to the registration message, the OLT periodically or periodically sends a GATE message to the ONU, waiting for the ONU to complete the relevant registration processing. After the ONU completes the relevant registration process, it can send a registration confirmation message to the OLT to confirm the completion of registration.

Specifically, in the embodiment of the present invention, the registration confirmation message is, for example, an MPCP-based REGISTER_ACK message, and the REGISTER_ACK message may include a source address, a destination address, and a message content, and the message content may further include, for example, a synchronization time confirmation (Echo of Sync Time) Information and/or LLID Confirmation (Echo of LLID) information.

It should be understood that the present invention is only described by using the application scenario shown in FIG. 1 as an example, but the present invention is not limited thereto. For example, the method for registering devices in the EPON system provided by the embodiment of the present invention may also be applied to multiple applications. An EPON system in which downlink wavelengths and multiple upstream wavelengths are communicated.

It should also be understood that, in the embodiment of the present invention, the registration request message sent by the ONU to the OLT may include the uplink wavelength information of the ONU, for example, the uplink wavelength and the uplink wavelength adjustment capability information, in addition to the downlink wavelength information of the ONU. And the uplink wavelength adjustment capability information includes, for example, at least one of the following information: an uplink wavelength adjustment interval, an uplink wavelength number, an uplink wavelength adjustment range, an adjustment time of each uplink wavelength adjustment interval, and an uplink wavelength adjustment speed.

It should be further understood that, in the embodiment of the present invention, the registration message sent by the OLT to the ONU may further include information that the OLT confirms the uplink wavelength information, for example, registering uplink wavelength confirmation information, uplink wavelength adjustment capability confirmation information, and the like, the uplink wavelength. Adjustment capability confirmation information includes, for example, the next Confirmation of at least one of the column information: an uplink wavelength adjustment interval, an uplink wavelength number, an uplink wavelength adjustment range, an adjustment time of each upstream wavelength adjustment interval, and an uplink wavelength adjustment speed.

It should also be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not imply a sequence of execution orders, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented by the present invention. The implementation of the examples constitutes any limitation.

Therefore, the device registration method in the Ethernet passive optical network system according to the embodiment of the present invention indicates that the downlink wavelength is registered in the registration request message sent by the optical network unit to the optical line terminal, so that the optical line terminal can determine the optical network. The downlink wavelength used by the unit enables device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, whereby the optical network unit and the optical line terminal can In addition, the method according to an embodiment of the present invention can also reduce the probability of error in the device registration process to provide a more rigorous, more standardized, and more efficient device registration mechanism.

The method 100 for device registration in an EPON system according to an embodiment of the present invention is described in detail above with reference to FIG. 2 to FIG. 4, and the EPON system according to the embodiment of the present invention will be described in detail from the ONU side in conjunction with FIG. Method 200 of device registration.

As shown in FIG. 5, a method 200 for device registration in an EPON system according to an embodiment of the present invention is shown. The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths. The method 200 can be performed by an ONU. For example, the method 200 can be performed by an NG-EPON ONU, a 1G EPON ONU, or a 10G EPON ONU.

As shown in FIG. 5, the method 200 includes:

S210. Receive a windowing message sent by the OLT.

S220, sending, according to the windowing message, a registration request message for requesting registration to the OLT, where the registration request message carries wavelength information of the ONU, where the wavelength information includes a registered downlink wavelength used by the ONU to receive the windowing message. ;

S230, receiving a registration message sent by the OLT according to the registration request message, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU;

S240. Send a registration confirmation message for confirming completion of registration to the OLT according to the registration message.

Specifically, in an EPON system that uses multiple downlink wavelengths and one uplink wavelength to perform a channel, the OLT sends a windowing message to the ONU, for example, by broadcasting, for asking whether there is a newly added. The ONU needs to register. If the newly added ONU needs to be registered, the ONU may send a registration request message to the OLT according to the windowing message when receiving the windowing message sent by the OLT, and the registration request message is used to request registration from the OLT. And the registration request message carries wavelength information, and the wavelength information can indicate the registered downlink wavelength used by the ONU to receive the windowing message. After receiving the wavelength information sent by the ONU, the OLT may send a registration message including the LLID to the ONU. After receiving the registration message sent by the OLT, the ONU may perform corresponding registration processing, and may send a registration confirmation message to the OLT. For indicating to the OLT that the ONU completes registration, in the EPON system, data communication can be performed between the OLT and the ONU.

In the embodiment of the present invention, optionally, the registration message further includes wavelength confirmation information, where the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

In the embodiment of the present invention, optionally, the discovery information field of the registration request message includes the wavelength information; or the registration request message includes a wavelength information field, where the wavelength information field includes the wavelength information.

In the embodiment of the present invention, optionally, the wavelength information further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength, and an The wavelength adjustment range of the filter, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

In the embodiment of the present invention, the wavelength information further includes an uplink wavelength and/or an uplink wavelength adjustment capability information of the ONU, where the uplink wavelength adjustment capability information includes at least one of the following information: an uplink wavelength adjustment interval, The number of upstream wavelengths, the upstream wavelength adjustment range, the adjustment time of each upstream wavelength adjustment interval, and the upstream wavelength adjustment speed.

It should be understood that, in the embodiment of the present invention, the windowing message is, for example, an MPCP-based GATE message; the registration request message is, for example, an MPCP-based REGISTER_REQ message; the registration message is, for example, an MPCP-based REGISTER message; the registration confirmation message is for example It is an MPCP-based REGISTER_ACK message. The foregoing message has been described in detail above with reference to FIG. 2 to FIG. 4, and is not described herein again for brevity. It should also be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not imply a sequence of execution orders, and the order of execution of the processes should be determined by its function and internal logic, and should not be implemented by the present invention. The implementation of the examples constitutes any limitation.

A method for device registration in an EPON system according to an embodiment of the present invention will be described in detail below with reference to FIG.

As shown in FIG. 6, in S310, the OLT broadcasts a GATA message to the ONU for inquiring whether there is a newly added ONU that needs to be registered. The GATA message may include, for example, a source address (SA), a destination address (DA), a Grant (Grant) message, a Sync Time message, and a Discovery Information.

In S320, the ONU broadcasts a REGISTER_REQ message to the OLT.

The REGISTER_REQ message is used to request registration from the OLT, and the REGISTER_REQ message carries wavelength information. The REGISTER_REQ message may include, for example, a source address (SA), a destination address (DA), a Pending Grants message, a Discovery Information, a Laser On Time message, and a laser off time (Laser Off). Time) Information and Wavelength Information.

In S330, the OLT broadcasts a REGISTER message to the ONU, and the REGISTER message includes wavelength confirmation information, and the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information. The REGISTER message may include, for example, a source address (SA), a destination address (DA), an LLID, a Sync Time message, an Echo of Pending Grants message, and a target laser on time. ) Information, Target Laser Off Time information and Echo of Wavelength Information.

In S340, the OLT sends a GATA message to the ONU unicast to authorize the ONU. The GATA message may include, for example, a source address (SA), a destination address (DA), and an authorization ( Grant).

In S350, the ONU unicasts a REGISTER_ACK message to the OLT, and the REGISTER_ACK message is used to indicate to the OLT that the ONU has completed registration. The REGISTER_ACK message may include, for example: a source address (SA), a destination address (DA), and the same Echo of Sync Time information and LLID confirmation (Echo of LLID) information. It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

The method for registering devices in an EPON system according to an embodiment of the present invention is described in detail with reference to FIG. 2 to FIG. 6 . The method for wavelength switching in an EPON system according to an embodiment of the present invention will be described in detail below with reference to FIG. 7 to FIG. .

FIG. 7 is a schematic flowchart of a method 500 for wavelength switching in an EPON system according to an embodiment of the present invention. The method 500 may be performed by an OLT. For example, the method 500 is performed by an NG-EPON OLT. As shown in FIG. 7, the method 500 includes: the wavelength switching request message is used to indicate that the ONU switches to a target downlink wavelength, and the wavelength switching request message includes target wavelength information for indicating the target downlink wavelength, and is used for indicating Switching time information of the start and end time of the downlink wavelength switching;

S520: Receive, on a fixed uplink wavelength channel, a wavelength switch confirmation message sent by the ONU according to the wavelength switch request message, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch.

S530, in the start and end time, transmitting a wavelength switching message to the ONU only on the target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switching message is used to authorize the ONU;

S540, when the ONU successfully switches to the target downlink wavelength in the start and end time, receiving, on the uplink wavelength channel, a wavelength switch completion message sent by the ONU according to the wavelength switching message, the wavelength switch completion message is used. Instructing the ONU to successfully switch to the target downstream wavelength during the start and end time.

Therefore, the method for wavelength switching in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and in the light The wavelength switching right message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the switching start and end time. The optical line terminal can be prevented from synchronizing the optical network unit on multiple downlink wavelength channels, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

Specifically, in S510, the OLT sends a wavelength switch request message to the ONU on the source downlink channel, the wavelength switch request message is used to indicate that the ONU switches to the target downlink wavelength, and includes target wavelength information and switching time information.

In the embodiment of the present invention, the switching time information includes, for example, a start time and a cutoff time of the downlink wavelength switching; for example, the switching time information includes a start time and a switching duration of the downlink wavelength switching; and, for example, the switching time information. The switching duration and the off time of the downlink wavelength switching are included; for example, the switching time information includes the starting time, the switching duration, and the deadline, but the present invention is not limited thereto.

In the embodiment of the present invention, optionally, the wavelength switching request message is a multipoint control protocol MPCP message or an operation management maintenance OAM message. The above-described wavelength switching request message will be described separately with reference to Figs. 8A and 9A.

FIG. 8A is a schematic structural diagram of an MPCP protocol-based adjustment control message according to an embodiment of the present invention. The wavelength switching request message in the embodiment of the present invention may use the structure of the adjustment control message shown in FIG. 8A.

Specifically, as shown in FIG. 8A, the MPCP operation code (Opt) 0001 indicates that the media access control (Media Access Control, referred to as "MAC") function is paused (PAUSE), that is, the message with the operation code of 0001 is paused ( PAUSE) message; similarly, the message with the operation code 0002 is a window open (GATE) message; the message with the operation code 0003 is a report (REPORT) message; the message with the operation code 0004 is a registration request (REGISTER_REQ) message; The message of 0005 is the REGISTER message; the message with the operation code 0006 is the registration confirmation (REGISTER_ACK) message; the message with the operation code of 0007 is the adjustment control (TUNING_CONTROL) message provided by the embodiment of the present invention, and the TUNING_CONTROL message can be used. The OLT sends a control command related to the downlink wavelength switch to the ONU. The message with the operation code 0008 is the TUNING_RESPONSE message provided by the embodiment of the present invention. The TUNING_RESPONSE message can be used by the ONU to feed back the response information related to the downlink wavelength switch to the OLT. . The TUNING_CONTROL message may include: a 6-byte Destination Address ("DA") field, a 6-byte Source Address ("SA") field, and 2 bytes. Length / Type field, 2-byte opcode (Opcode) field, 4-byte timestamp (Timestamp) field, 1-byte flag (Flags) field, 2 words Target Wavelength Information field, 1-byte Start Time field, 1-byte Timeouts field, 1-byte Grants field, 32 words The padding field of the section and the 4-byte frame check sequence ("FCS") field.

In the embodiment of the present invention, the one-byte flag (Factors) field may include, for example, four states. For example, when the Flags is "00", the OLT may indicate that the registered ONU performs downlink wavelength switching; for example, When the Flags is "01", it may indicate that the OLT indicates that the ONU that is ready for wavelength switching cancels the downlink wavelength switching; for example, when the Flags is "10", it may indicate that the OLT confirms that the ONU downlink wavelength switching is successful; for example, When Flags is "11", it may indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful, but the present invention is not limited thereto.

That is, Fig. 8A shows a wavelength switching request message based on the MPCP protocol, and the OAM protocol based wavelength switching request message shown in Fig. 9A will be described below.

FIG. 9A is a schematic structural diagram of an OAM protocol-based adjustment control message according to an embodiment of the present invention. The wavelength switching request message in the embodiment of the present invention may use the structure of the adjustment control message shown in FIG. 9A.

As shown in FIG. 9A, the OAM message may include, for example, a 6-byte destination address (Destination

Address ) Domain, 6-byte source address field, 2 bytes length (Type) field, 2 bytes subtype (Subtype) field, 1 byte frame check sequence flag (the flags) domain, two bytes of code (Code) field, a 2-byte padding (Pad) and 4-byte field bad ¹ J (frame check sequence) field.

In the 2-byte code field, the code "00" may, for example, indicate that the OAM message is an Information message; the code "00" may, for example, indicate that the OAM message is an Information message; Code "01" For example, the OAM message may be an Event Notification message; the code "02" may indicate that the OAM message is a Variable Request message; for example, the code "03" may indicate that the OAM message is a variable response. (Variable Response) message; the code "04" may, for example, indicate that the OAM message is a loopback control message; the code "05" may, for example, indicate that the OAM message is The Tuning Control message is provided by the embodiment of the present invention; the code "06" may indicate that the OAM message is the Tuning Response message provided by the embodiment of the present invention; and the code "FE" may indicate that the OAM message is Organization Specific message.

The content of the Tuning Control message may include, for example, at least one of the following information: flag information, target wavelength information, start time information, timeout information, and 4 authorized information. The flag (Flags) information may include, for example, four states. For example, when the Flags is "00", the OLT may indicate that the registered ONU performs downlink wavelength switching. For example, when the Flags is "01", the OLT may be represented. The ONU that is instructed to perform the wavelength switching cancels the downlink wavelength switching. For example, when the Flags is "10", the OLT can confirm that the ONU downlink wavelength switching is successful. For example, when the Flags is "11", the OLT can confirm that the OLT confirms the The ONU downlink wavelength switching is not successful, but the present invention is not limited thereto.

Therefore, in the embodiment of the present invention, the wavelength switching request message is, for example, a Flags based on MPCP or OAM protocol, and is a "00" Tuning Control message.

In this embodiment, the wavelength switching request message may further include a flag and/or downlink wavelength adjustment capability information for indicating a message type, where the downlink wavelength adjustment capability information includes at least one of the following information: The adjustment interval, the number of downstream wavelengths, the wavelength adjustment range of the tunable filter, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed, but the present invention is not limited thereto.

In S520, the OLT receives a wavelength switch confirmation message sent by the ONU on a fixed uplink wavelength channel, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch.

In the embodiment of the present invention, optionally, the wavelength switch confirmation message is a multipoint control protocol MPCP message or an operation management maintenance OAM message. The above-described wavelength switching confirmation message will be described below with reference to Figs. 8B and 9B, respectively.

As shown in FIG. 8B, a schematic structural diagram of an MPCP protocol-based adjustment response message according to an embodiment of the present invention is shown. The wavelength switching confirmation message in the embodiment of the present invention may use the adjustment response cancellation shown in FIG. 8B. Structure.

The TUNING_RESPONSE message with the operation code of 0008 may include, for example, a 6-byte Destination Address field, a 6-byte Source Address field, and a length of 2 bytes ( Length ) / Type (Type) field, 2 words Opcode field of the section, Timestamp field of 4 bytes, Flags field of 1 byte, Echoed Wavelength Information field of 2 bytes, 1 word start time confirmation section (Echoed start time) field, a frame check sequence byte acknowledgment timeout (Echoed timeouts) field, 32 bytes of padding (Pad) and 4-byte field bad ¹ J (frame Check Sequence) field.

In the embodiment of the present invention, the 1 byte flag field may include, for example, four states. For example, when the Flags is "00", the ONU may determine that the downlink wavelength switching is performed; for example, the Flags is When "01", it can be said that the ONU cannot perform downlink wavelength switching; for example, when the Flags is "10", it can indicate that the ONU feedback downlink wavelength switching is successful; for example, when the Flags is "11", it can indicate that the ONU feedback is not The downlink wavelength switching is completed and rolled back to the source downstream wavelength channel, but the present invention is not limited thereto.

FIG. 9B is a schematic structural diagram of an OAM protocol-based adjustment response message according to an embodiment of the present invention. The wavelength switching acknowledgement message in the embodiment of the present invention may use the structure of the adjustment response message shown in FIG. 9B.

As shown in Fig. 9B, the content of the Tuning Response message whose code is "06" may include, for example, at least one of the following information: flag information, target wavelength confirmation information, start time confirmation information, and timeout confirmation information. The flag (Flags) information may include, for example, four states. For example, when the Flags is "00", it may indicate that the ONU determines to perform downlink wavelength switching. For example, when the Flags is "01", it may indicate that the ONU cannot be executed. Downlink wavelength switching; For example, when the Flags is "10", it can indicate that the ONU feeds back the downlink wavelength switching success information; for example, when the Flags is "11", it can indicate that the ONU feedbacks the downlink wavelength switching unsuccessful information, and rolls back To the source downstream wavelength channel, the invention is not limited thereto.

Therefore, in the embodiment of the present invention, the wavelength switch confirmation message is, for example, a Tuning Response message whose flag is "00" based on MPCP or OAM protocol.

In the embodiment of the present invention, the wavelength switch confirmation message may further include at least one of the following information: a flag for indicating a message type, downlink wavelength adjustment capability confirmation information, and handover time confirmation information, where the downlink wavelength adjustment capability The confirmation information includes confirmation of at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed, but The invention is not limited to this.

In S530, during the start and end time, the OLT only targets the target downstream wavelength. A wavelength switching 4 消息 message is sent to the ONU on the downlink wavelength channel.

It should be understood that, in the embodiment of the present invention, during the start and end of the downlink wavelength switching, the OLT performs authorization only on the target downlink wavelength channel, and does not perform synchronization authorization on multiple or all downlink wavelength channels, thereby improving Switching efficiency, reducing the probability of switching errors, and increasing the traffic of the system.

It should also be understood that in the embodiment of the present invention, the OLT may periodically send a wavelength switching grant message during the start and end time. If the OLT receives the wavelength switching complete message sent by the ONU during the start and end time, the ONU handover succeeds, so that the OLT does not need to send the wavelength handover grant message to the ONU.

That is, in the embodiment of the present invention, optionally, during the start and end time and only received at the OLT

Before the wavelength switching completion message sent by the ONU, the OLT sends a wavelength switching authorization message to the ONU only on the target downlink wavelength channel.

In the embodiment of the present invention, the wavelength switching grant message may also be an Tuning Control message based on the MPCP or the OAM protocol, as shown in FIG. 8A and FIG. 9A. For brevity, details are not described herein again.

In S540, when the ONU successfully switches to the target downlink wavelength in the start and end time, the OLT receives a wavelength switch completion message sent by the ONU on the uplink wavelength channel, to indicate that the ONU successfully switches to the start and end time. The target downstream wavelength.

That is, during the start and stop time, if the ONU successfully switches to the target downlink wavelength, the ONU can receive the wavelength switching authorization message periodically sent by the OLT, for example, the ONU can switch the authorization message according to the wavelength. A wavelength switch completion message is sent to the OLT on the fixed upstream wavelength channel.

In the embodiment of the present invention, the wavelength switch completion message may also be a Tuning Response message based on the MPCP or the OAM protocol, where the Flags of the Tuning Response message may be “10”, indicating that the ONU feedback downlink wavelength switching succeeds. As shown in FIG. 8B and FIG. 9B, for brevity, details are not described herein again.

Therefore, the method for wavelength switching in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. The wavelength switching right message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the start and end time of the switching, and can avoid the optical line terminal at the same time. Down Synchronizing the optical network unit on the wavelength channel, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

In the embodiment of the present invention, optionally, as shown in FIG. 10, the method 500 further includes:

S550. The wavelength switching success message is sent to the ONU according to the wavelength switching completion message, where the wavelength switching success message is used to indicate that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

That is, in the embodiment of the present invention, when the OLT receives the wavelength switching completion message sent by the ONU, the OLT may send a wavelength switching success message to the ONU on the target downlink wavelength channel, so as to indicate that the OLT confirms the ONU downlink. The wavelength switching was successful.

In the embodiment of the present invention, the wavelength switching success message may also be an adjustment control (Tuning Control) message based on the MPCP or the OAM protocol, where the Flags of the Tuning Control message may be “10”, indicating that the OLT confirms the downlink wavelength of the ONU. The switching succeeds, as shown in FIGS. 8A and 9A, for brevity, details are not described herein again.

The downlink wavelength switching success of the ONU in the EPON system is described in detail above with reference to FIG. 7 to FIG. 10. The following describes the unsuccessful downlink wavelength switching of the ONU in conjunction with FIG.

As shown in FIG. 11, the method 500 for wavelength switching in the EPON system provided by the embodiment of the present invention further includes:

S560, when the wavelength switching completion message sent by the ONU is not received within the start and end time, sending the wavelength switching message to the ONU only on the source downlink wavelength channel;

S570. The wavelength switching incomplete message sent by the ONU according to the wavelength switching authorization message is received on the uplink wavelength channel, where the wavelength switching incomplete message is used to indicate that the ONU does not successfully switch to the target downlink wavelength within the start and end time. .

That is, in the embodiment of the present invention, when the OLT does not receive the wavelength switching completion message sent by the ONU within the start and end time, the OLT sends a wavelength switching authorization message to the ONU only on the source downlink wavelength channel, thereby enabling downlink wavelength switching. The unsuccessful ONU can receive information on the source and downlink wavelength channels, so that the ONU can switch the grant message according to the wavelength, and send a wavelength switch incomplete message to the OLT on the fixed uplink wavelength channel to indicate that the ONU is at the start and end. The target downlink wavelength was not successfully switched within the time.

Therefore, in the embodiment of the present invention, even if the ONU downlink wavelength switching is not successful, the OLT only authorizes the ONU on the source downlink channel, so that the ONU can roll back to the source and downlink wavelength channels, thereby simplifying the downlink wavelength switching process. , reduce the probability of switching errors, and can improve The amount of business in the system.

In the embodiment of the present invention, the wavelength switching incomplete message may also be based on MPCP or

The Tuning Response message of the OAM protocol, where the Flags of the Tuning Response message may be "11", indicating that the ONU feedbacks the downlink wavelength switching unsuccessful information, as shown in FIGS. 8B and 9B, for the sake of brevity, no longer Narration.

In the embodiment of the present invention, optionally, as shown in FIG. 11, the method 500 further includes: S580, on the source downlink wavelength channel, sending a wavelength switch to the ONU according to the wavelength switching incomplete message is unsuccessful The message that the wavelength switch unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

That is, in the embodiment of the present invention, when the OLT receives the wavelength switch incomplete message sent by the ONU, the OLT may send a wavelength switch unsuccessful message to the ONU on the source downlink wavelength channel, to indicate that the OLT confirms the The ONU downlink wavelength switching was unsuccessful.

In the embodiment of the present invention, the wavelength switch unsuccessful message may also be an adjustment control (Tuning Control) message based on the MPCP or the OAM protocol, where the Flags of the Tuning Control message may be "11", indicating that the OLT confirms the ONU downlink. The wavelength switching is unsuccessful, as shown in FIG. 8A and FIG. 9A. For brevity, details are not described herein again.

It should be understood that the embodiment of the present invention is only an example of an EPON system having multiple downlink wavelength channels and one uplink wavelength channel. However, the present invention is not limited thereto, and the wavelength switching method provided by the embodiment of the present invention may also be applied to An EPON system having multiple downstream wavelength channels and multiple upstream wavelength channels.

The method 500 for wavelength switching in an EPON system according to an embodiment of the present invention is described in detail above with reference to FIG. 7 to FIG. 11. The following describes the method according to the embodiment of the present invention from the ONU side in conjunction with FIG. 12 to FIG. Method 600 for wavelength switching in an EPON system.

As shown in FIG. 12, a method 600 for wavelength switching in an EPON system according to an embodiment of the present invention includes:

S610, receiving a wavelength switching request message sent by the optical line terminal OLT on the source downlink wavelength channel, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and the wavelength switching request message includes Target wavelength information of the downlink wavelength, and switching time information for indicating the start and end time of the downlink wavelength switching;

S620: Send, on the fixed uplink wavelength channel, a wavelength switch confirmation message to the OLT according to the wavelength switching request message, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch.

S630, when the ONU successfully switches to the target downlink wavelength in the start and end time, receiving an authorization message, where the wavelength switching authorization message is used to authorize the ONU;

S640, on the uplink wavelength channel, send a wavelength switch completion message to the OLT according to the wavelength switching authorization message, where the wavelength switch completion message is used to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

Therefore, the method for wavelength switching in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. The wavelength switching right message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the start and end time of the switching, and can avoid the optical line terminal at the same time. Synchronizing the optical network unit on the downlink wavelength channel, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

In the embodiment of the present invention, optionally, the method 600 further includes:

S650, on the target downlink wavelength channel, receive a wavelength switching success message sent by the OLT according to the wavelength switching completion message, where the wavelength switching success message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is successful. In an embodiment of the present invention, optionally, the method 600 further includes:

S660, when the ONU fails to successfully switch to the target downlink wavelength within the start and end time, after the start and end time expires, receiving the wavelength switching authorization message sent by the OLT only on the source downlink wavelength channel;

S670. Send, on the uplink wavelength channel, a wavelength switch incomplete message to the OLT according to the wavelength switching grant message, where the wavelength switch incomplete message is used to indicate that the ONU does not successfully switch to the target downlink wavelength within the start and end time.

S680, on the source downlink wavelength channel, receiving a wavelength switch unsuccessful message that the OLT switches the uncompleted message according to the wavelength switch, where the wavelength switch unsuccessful message is used to indicate that the OLT confirms that the ONU downlink wavelength switch is unsuccessful.

In the embodiment of the present invention, optionally, at least one of the wavelength switch request message, the wavelength switch acknowledgement message, the wavelength switch grant message, and the wavelength switch complete message is a multipoint control protocol (MPCP) message or operation management. Maintain OAM messages.

In the embodiment of the present invention, the wavelength switching request message is, for example, an adjustment control (Tuning Control) message based on the MPCP or the OAM protocol, where the Flags of the Tuning Control message may be "00", indicating that the OLT indicates that the registered ONU is performing. The downlink wavelength switching is as shown in FIG. 8A and FIG. 9A. For brevity, details are not described herein again.

In the embodiment of the present invention, the wavelength switch confirmation message is, for example, an adjustment response (Tuning Response) message based on the MPCP or the OAM protocol, where the Flags of the Tuning Response message may be “00”, indicating that the ONU determines to perform downlink wavelength switching. As shown in FIG. 8B and FIG. 9B, for brevity, details are not described herein again.

In the embodiment of the present invention, the wavelength switch completion message may also be a Tuning Response message based on the MPCP or the OAM protocol, where the Flags of the Tuning Response message may be “10”, indicating that the ONU feedback downlink wavelength switching succeeds. As shown in FIG. 8B and FIG. 98, for brevity, details are not described herein again.

The wavelength switching success message can also be an adjustment control based on MPCP or OAM protocol.

(Tuning Control) message, where the Flags of the Tuning Control message can be "10", The OLT confirms that the ONU downlink wavelength switching is successful, as shown in FIG. 8A and FIG. 9A. For brevity, details are not described herein again.

The wavelength switching incomplete message may also be an Tuning Response message based on the MPCP or the OAM protocol, where the Flags of the Tuning Response message may be "11", indicating that the ONU feeds back the downlink wavelength switching unsuccessful information, as shown in FIG. 8B. As shown in FIG. 9B, for brevity, no further details are provided herein.

The wavelength switching unsuccessful message may also be an Tuning Control message based on the MPCP or the OAM protocol, where the Flags of the Tuning Control message may be "11", indicating that the OLT confirms that the ONU downlink wavelength switching is unsuccessful, as shown in the figure. 8A and 9A are shown here for brevity.

The method for wavelength switching in the EPON system provided by the embodiment of the present invention will be described in detail below with reference to the flowchart shown in FIG.

As shown in FIG. 15, in S711, the transmitting port 1 of the OLT sends a wavelength switching request message to the ONU on the source downlink wavelength channel, where the wavelength switching request message is used to indicate that the ONU switches to the target downlink wavelength, and the wavelength switching request is The message includes target wavelength information and switching time information.

In S712, the ONU sends a wavelength switch to the OLT on a fixed upstream wavelength channel. And confirming the message, to indicate that the ONU determines to perform the downlink wavelength switching.

In S713, the transmitting port 2 of the OLT transmits a wavelength switching message to the ONU only on the target downlink wavelength channel during the starting and ending time to perform 4 authorization on the ONU.

During the start and end time, if the ONU successfully switches to the target downstream wavelength, the flow proceeds to S731 to S734; if the ONU does not successfully switch to the target downstream wavelength, the flow proceeds to S751 to S753.

In S731, the ONU receives the wavelength switching grant message sent by the OLT during the start and stop time and on the target downlink wavelength channel.

In S732, the ONU sends a wavelength switch completion message to the OLT on the fixed uplink wavelength channel, so as to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

In S733, the transmitting port 2 of the OLT sends a wavelength switching success message to the ONU on the target downlink wavelength channel, so that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

In S734, the ONU successfully completes the downlink wavelength switching, and establishes data communication with the OLT on the target downlink channel, so that the OLT can send data to the ONU on the target downlink channel, and the ONU can send data to the OLT on the fixed uplink wavelength channel. .

In S751, the OLT does not receive the wavelength switching completion message sent by the ONU during the start and end time, and the transmitting port 1 of the OLT sends the wavelength switching to the ONU only on the source downlink wavelength channel after the start and end time expires. Right message.

In S752, the ONU sends a wavelength switch incomplete message to the OLT on the fixed upstream wavelength channel, to indicate that the ONU does not successfully switch to the target downlink wavelength within the start and end time.

In S753, the sending port 1 of the OLT sends a wavelength switching unsuccessful message to the ONU on the source downlink wavelength channel, so as to indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful. In the embodiment, the size of the sequence numbers of the foregoing processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiments of the present invention.

Therefore, the method for wavelength switching in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. Transmitting a wavelength switching right message to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can The downlink wavelength switching is performed during the start and end of the switching, and the optical line terminal can be prevented from synchronizing the optical network unit in multiple downlink wavelength channels, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system. The amount of business.

The method for device registration and wavelength switching in the EPON system provided by the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 15. The optical line terminal and the light according to the embodiment of the present invention will be described in detail below with reference to FIG. 16 to FIG. Network unit.

FIG. 16 is a schematic block diagram of an optical line terminal OLT 10 in an EPON system according to an embodiment of the present invention. The EPON system further includes an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength is communicated. As shown in FIG. 16, the OLT 10 includes:

The sending module 11 is configured to send a windowing message to the ONU;

The receiving module 12 is configured to receive a registration request message for requesting registration that is sent by the ONU according to the windowing message sent by the sending module, where the registration request message carries wavelength information of the ONU, where the wavelength information includes the ONU receiving The sending downlink module is configured to: the sending module 11 is further configured to: send, according to the registration request message received by the receiving module 12, a registration message to the ONU, where the registration message includes the OLT as the ONU Assigned logical link tag LLID;

The receiving module 12 is further configured to: receive a registration confirmation message sent by the ONU according to the registration message sent by the sending module 11 for confirming completion of registration.

Therefore, the optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention indicates that the downlink wavelength is registered in the registration request message sent by the optical network unit to the optical line terminal, so that the optical line terminal can determine the optical network. The downlink wavelength used by the unit enables device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, whereby the optical network unit and the optical line terminal can Data communication.

In the embodiment of the present invention, optionally, the LLID sent by the sending module 11 includes information for indicating the registered downlink wavelength.

In the embodiment of the present invention, optionally, the registration message sent by the sending module 11 further includes wavelength confirmation information, where the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

In the embodiment of the present invention, optionally, the discovery information field of the registration request message received by the receiving module 12 includes the wavelength information; or the registration request message received by the receiving module 12 includes a wavelength information field, and the wavelength information domain This wavelength information is included. In the embodiment of the present invention, optionally, the wavelength information received by the receiving module 12 further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: Downstream wavelength adjustment interval The number of downstream wavelengths, the wavelength adjustment range of the tunable filter, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

It should be understood that, in the embodiment of the present invention, the windowing message is, for example, an MPCP-based GATE message; the registration request message is, for example, an MPCP-based REGISTER_REQ message; the registration message is, for example, an MPCP-based REGISTER message; the registration confirmation message is for example For the MPCP-based REGISTER_ACK message, for the sake of brevity, it is not mentioned here.

It should be understood that the optical line terminal 10 according to an embodiment of the present invention may correspond to the OLT in the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the optical line terminal 10 are respectively implemented in order to implement FIGS. 2 to 4 The corresponding process of the method 100 in the following is omitted for brevity.

FIG. 17 is a schematic block diagram of an optical network unit ONU 20 in an EPON system according to an embodiment of the present invention. The EPON system further includes an optical line terminal OLT, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength is communicated. As shown in FIG. 17, the ONU 20 includes:

The receiving module 21 is configured to receive a windowing message sent by the OLT;

The sending module 22 is configured to send, according to the windowing message received by the receiving module 21, a registration request message for requesting registration to the OLT, where the registration request message carries wavelength information of the ONU, where the wavelength information includes the ONU receiving the The registered downstream wavelength used in the windowing message;

The receiving module 21 is further configured to: receive a registration message sent by the OLT according to the registration request message sent by the sending module 22, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU;

The sending module 22 is further configured to: send a registration confirmation message for confirming completion of registration to the OLT according to the registration message received by the receiving module 21.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention indicates that the downlink wavelength is registered in the registration request message sent by the optical network unit to the optical line terminal, so that the optical network unit The optical line terminal can determine the downlink wavelength used by the optical network unit, thereby enabling device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, thereby the optical network unit Data communication is possible between the optical line terminal and the optical line terminal.

In the embodiment of the present invention, optionally, the LLID received by the receiving module 21 includes information for indicating the registered downlink wavelength.

In the embodiment of the present invention, optionally, the registration message received by the receiving module 21 further includes wavelength confirmation information, where the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

In the embodiment of the present invention, optionally, the discovery information field of the registration request message sent by the sending module 22 includes the wavelength information; or the registration request message sent by the sending module 22 includes a wavelength information field, and the wavelength information domain This wavelength information is included.

In the embodiment of the present invention, optionally, the wavelength information sent by the sending module 22 further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: Downstream wavelength adjustment interval The number of downstream wavelengths, the wavelength adjustment range of the tunable filter, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

It should be understood that the optical network unit 20 according to an embodiment of the present invention may correspond to the ONUs in the embodiments of the present invention, and the above and other operations and/or functions of the respective modules in the optical network unit 20 are respectively implemented to implement the method in FIG. The corresponding process of 200, for the sake of brevity, will not be repeated here.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention indicates that the downlink wavelength is registered in the registration request message sent by the optical network unit to the optical line terminal, so that the optical line terminal can determine the optical network. The downlink wavelength used by the unit enables device registration in an Ethernet passive optical network system that uses multiple downlink wavelengths and one upstream wavelength for communication, whereby the optical network unit and the optical line terminal can Data communication.

The optical line terminal and the optical network unit for device registration in the EPON system provided by the embodiment of the present invention are described in detail above with reference to FIG. 16 and FIG. 17. The following provides a detailed description of the embodiments of the present invention with reference to FIG. 18 and FIG. Optical line terminations and optical network units for wavelength switching in EPON systems.

FIG. 18 is a schematic block diagram of an optical line terminal 30 according to an embodiment of the present invention. Figure 18 As shown, the OLT 30 includes: a change request message, the wavelength switch request message is used to indicate that the ONU switches to a target downlink wavelength, and the wavelength switch request message includes target wavelength information for indicating the target downlink wavelength, and is used for Switching time information indicating a start and end time of the downlink wavelength switching;

The receiving module 32 is configured to receive, on the fixed uplink wavelength channel, a wavelength switch confirmation message sent by the ONU according to the wavelength switching request message sent by the sending module 31, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the Downlink wavelength switching;

The sending module 31 is further configured to: send, in the start and end time, only a wavelength switching 4 吏 right message to the ONU on the target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switching authorization message is used to ONU authorization;

The receiving module 32 is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive the wavelength sent by the ONU according to the wavelength switching authorization message sent by the sending module 31 on the uplink wavelength channel. The handover complete message is used to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

Therefore, the optical line terminal in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. The wavelength switching grant message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the start and end time of the switching, and can avoid the optical line terminal at the same time. Synchronizing the optical network unit on the downlink wavelength channel, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

In the embodiment of the present invention, the sending module 31 is further configured to: send, on the target downlink wavelength channel, a wavelength switching success message to the ONU according to the wavelength switching completion message, where the wavelength switching success message is used to indicate The optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

In the embodiment of the present invention, the sending module 31 is further configured to: when the wavelength switching completion message sent by the ONU is not received within the start and end time, only to the ONU on the source downlink wavelength channel. Sending the wavelength switch 4 吏 message;

The receiving module 32 is further configured to: receive, on the uplink wavelength channel, a wavelength switching incomplete message sent by the ONU according to the wavelength switching message, where the wavelength switching incomplete message is used to indicate The ONU does not successfully switch to the target downstream wavelength during the start and end time.

In the embodiment of the present invention, the sending module 31 is further configured to: send, on the source downlink wavelength channel, a wavelength switching unsuccessful message to the ONU according to the wavelength switching incomplete message, where the wavelength switching unsuccessful message It is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

In the embodiment of the present invention, the wavelength switching completion message may also be an adjustment response (Tuning Response) message based on the MPCP or the OAM protocol, where the Flags of the Timing Response message may be “10”, indicating that the ONU feedback downlink wavelength switching succeeds. As shown in FIG. 8B and FIG. 98, for brevity, details are not described herein again.

The wavelength switching success message may also be an adjustment control (Tuning Control) message based on the MPCP or the OAM protocol, where the Flags of the Tuning Control message may be "10", indicating that the OLT confirms that the ONU downlink wavelength switching is successful, as shown in FIG. 8A and As shown in Fig. 9A, for the sake of brevity, it will not be repeated here.

The wavelength switching unsuccessful message may also be an adjustment control based on MPCP or OAM protocol. The Tuning Control message, where the Flags of the Tuning Control message may be "11", indicating that the OLT confirms that the ONU downlink wavelength switching is unsuccessful, as shown in FIGS. 8A and 9A, and is not described herein again for brevity.

It should be understood that the optical line terminal 30 according to an embodiment of the present invention may correspond to the OLT in the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the optical line terminal 30 are respectively implemented in order to implement FIGS. 7 to 11 The corresponding process of the method 500 in the following is omitted for brevity.

FIG. 19 is a schematic block diagram of an optical network unit 40 provided by an embodiment of the present invention. As shown in Figure 19, the ONU 40 includes:

The receiving module 41 is configured to receive, by using the source downlink downlink channel, a wavelength switching request message sent by the optical line terminal OLT, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and the wavelength switching request message includes The target wavelength information indicating the downlink wavelength of the target, and the switching time information for indicating the start and end time of the downlink wavelength switching;

The sending module 42 is configured to send, according to the wavelength switching request message received by the receiving module 41, a wavelength switching confirmation message to the OLT, where the wavelength switching confirmation message is used to indicate that the ONU determines to perform the downlink wavelength. Switch

The receiving module 41 is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive the wavelength switching authorization message sent by the OLT only on the target downlink wavelength channel corresponding to the target downlink wavelength. The wavelength switching authorization message is used to authorize the ONU;

The sending module 42 is further configured to: send, on the uplink wavelength channel, a wavelength switching complete message to the OLT according to the wavelength switching message received by the receiving module 41, where the wavelength switching complete message is used to indicate that the ONU is in the Successfully switch to the target downstream wavelength during the start and end time.

Therefore, the optical network unit in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and the optical line is in the optical line. The wavelength switching authorization message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching during the switching start and end time. The optical line terminal can be prevented from synchronizing the optical network unit on multiple downlink wavelength channels, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

In the embodiment of the present invention, the receiving module 41 is further configured to: receive, on the target downlink wavelength channel, a wavelength switching success message sent by the OLT according to the wavelength switching completion message, where the wavelength switching success message is used. Instructing the OLT to confirm that the ONU downlink wavelength switching is successful.

In the embodiment of the present invention, the receiving module 41 is further configured to: when the ONU fails to successfully switch to the target downlink wavelength within the start and end time, after the start and end time expires, receiving the OLT only in the The wavelength switching 4 吏 message sent on the source downlink wavelength channel;

The sending module 42 is further configured to: send, on the uplink wavelength channel, a wavelength switch incomplete message to the OLT according to the wavelength switching authorization message, where the wavelength switch incomplete message is used to indicate that the ONU does not successfully switch in the start and end time. Down to the target downstream wavelength.

In the embodiment of the present invention, the receiving module 41 is further configured to: receive, on the source downlink wavelength channel, a wavelength switching unsuccessful message that is sent by the OLT according to the wavelength switching incomplete message, where the wavelength switching is unsuccessful The message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful.

In the embodiment of the present invention, the wavelength switching grant message may also be an Tuning Control message based on the MPCP or the OAM protocol, as shown in FIG. 8A and FIG. 9A. I will not repeat them here.

The wavelength switching incomplete message may also be an adjusted response based on MPCP or OAM protocol.

The Tuning Response message, where the Flags of the Tuning Response message may be "11", indicating that the ONU feeds back the downlink wavelength switching unsuccessful information, as shown in FIG. 8B and FIG. 9B. For brevity, details are not described herein again.

It should be understood that the optical network unit 40 according to an embodiment of the present invention may correspond to the ONUs in the embodiments of the present invention, and the above and other operations and/or functions of the respective modules in the optical network unit 40 are respectively implemented in order to implement FIGS. 12 to 14 The corresponding process of the method 600 in the following is omitted for brevity.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. The wavelength switching grant message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the start and end time of the switching, and can avoid the optical line terminal at the same time. Synchronizing the optical network unit on the downlink wavelength channel, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic.

As shown in FIG. 20, an embodiment of the present invention further provides an optical line terminal OLT 60 in an EPON system, where the EPON system further includes an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength is communicated. The optical line terminal 60 includes a processor 61, a memory 62, a bus system 63, a receiver 64, and a transmitter 65. Wherein, the processor 61, The memory 62, the receiver 64 and the transmitter 65 are connected by a bus system 63 for storing instructions for executing instructions stored in the memory 62 to control the receiver 64 to receive signals and to control the transmitter. The transmitting signal is used to: send a windowing message to the ONU; the receiver 64 is configured to: receive a registration request message for requesting registration sent by the ONU according to the windowing message, the registration request message Carrying the wavelength information of the ONU, the wavelength information includes a registered downlink wavelength used by the ONU to receive the windowing message; wherein the transmitter 65 is further configured to: send a registration message to the ONU according to the registration request message, the registration The message includes a logical link identifier LLID assigned by the OLT to the ONU. The receiver 64 is further configured to: receive a registration confirmation message sent by the ONU according to the registration message for confirming completion of registration.

It should be understood that, in the embodiment of the present invention, the processor 61 may be a central processing unit ("CPU"), and the processor 61 may also be other general-purpose processors, digital signal processors (DSPs). An application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 62 can include read only memory and random access memory and provides instructions and data to the processor 61. A portion of memory 62 may also include non-volatile random access memory. For example, the memory 62 can also store information of the device type.

The bus system 63 may include, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 63 in the figure.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 61 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 62, and the processor 61 reads the information in the memory 62 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.

Optionally, as an embodiment, the LLID includes information for indicating the registered downlink wavelength.

Optionally, as an embodiment, the registration message further includes wavelength confirmation information, where the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

Optionally, as an embodiment, the discovery information field of the registration request message includes the wavelength information; or the registration request message includes a wavelength information field, where the wavelength information field includes the wavelength information.

Optionally, as an embodiment, the wavelength information further includes downlink wavelength adjustment capability information of the ONU, where the downlink wavelength adjustment capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, and an adjustable filter. The wavelength adjustment range of the device, the adjustment time of each downstream wavelength adjustment interval, and the downstream wavelength adjustment speed.

It should be understood that the optical line terminations 60 in accordance with embodiments of the present invention may correspond to the above and other operations and/or functions of the various modules in the end 60 of the present embodiments, respectively, in order to achieve the correspondingness of the method 100 of FIGS. 2 through 4, respectively. The process, for the sake of brevity, will not be described here.

As shown in FIG. 21, an embodiment of the present invention further provides an optical network unit ONU 70 in an EPON system, where the EPON system further includes an optical line terminal OLT, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink. The wavelength is communicated. The optical network unit 70 includes a processor 71, a memory 72, a bus system 73, a receiver 74, and a transmitter 75. The processor 71, the memory 72, the receiver 74 and the transmitter 75 are connected by a bus system 73 for storing instructions for executing instructions stored in the memory 72 for controlling the receiver 74 to be connected. Receiving a signal, and controlling the transmitter 75 to send a signal; wherein the receiver 74 is configured to receive a windowing message sent by the OLT; the transmitter 75 is configured to: send, according to the windowing message, a request for registration to the OLT a registration request message, the registration request message carrying the wavelength information of the ONU, the wavelength information including the registered downlink wavelength used by the ONU to receive the windowing message; wherein the receiver 74 is further configured to: receive the OLT according to the registration And a registration message sent by the request message, the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; the sender 75 is further configured to: send, according to the registration message, a registration confirmation message for confirming completion of registration to the OLT.

It should be understood that the optical network unit 70 according to the embodiment of the present invention may correspond to the ONU in the embodiment of the present invention, and may correspond to the optical network unit 20 provided by the embodiment of the present invention, and the foregoing modules of the optical line terminal 70. And other operations and/or functions, respectively, in order to implement the corresponding processes of the method 200 in FIG. 5, for brevity, no further details are provided herein.

Therefore, the optical network unit in the Ethernet passive optical network system according to the embodiment of the present invention passes The registration request message sent by the optical network unit to the optical line terminal indicates that the downlink wavelength is registered, so that the optical line terminal can determine the downlink wavelength used by the optical network unit, thereby performing communication by using multiple downlink wavelengths and one uplink wavelength. Device registration can be implemented in an Ethernet passive optical network system, whereby data communication can be performed between the optical network unit and the optical line terminal.

As shown in FIG. 22, an embodiment of the present invention further provides an optical line terminal in an EPON system.

The OLT 80, the optical line terminal 80 includes a processor 81, a memory 82, a bus system 83, a receiver 84, and a transmitter 85. The processor 81, the memory 82, the receiver 84 and the transmitter 85 are connected by a bus system 83 for storing instructions for executing instructions stored in the memory 82 for controlling the receiver 84 to receive. Signaling, and controlling the transmitter 85 to send a signal;

The transmitter 85 is configured to: send a wavelength switch request message to the optical network unit ONU on the source downlink wavelength channel, where the wavelength switch request message is used to indicate that the ONU switches to the target downlink wavelength, and the wavelength switch request message includes The target wavelength information indicating the downlink wavelength of the target, and the switching time information for indicating the start and end time of the downlink wavelength switching;

The receiver 84 is configured to: receive, on a fixed uplink wavelength channel, a wavelength switch confirmation message sent by the ONU according to the wavelength switch request message, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch;

The transmitter 85 is further configured to: send, in the start and end time, only a wavelength switch 4 吏 right message to the ONU on the target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switch authorization message is used to The ONU performs 4 authorizations;

The receiver 84 is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive a wavelength switch completion message sent by the ONU according to the wavelength switching authorization message on the uplink wavelength channel, where the wavelength switch is performed. The completion message is used to indicate that the ONU successfully switches to the target downstream wavelength within the start and end time.

Therefore, the optical line terminal in the Ethernet passive optical network system according to the embodiment of the present invention indicates the target wavelength information and the switching time information to the optical network unit through the optical line terminal, and switches the start and end time of the downlink wavelength indicated by the optical line terminal. The wavelength switching grant message is sent to the optical network unit only on the target downlink wavelength channel corresponding to the target downlink wavelength, so that the optical network unit can perform downlink wavelength switching within the start and end time of the switching, and can avoid the optical line terminal at the same time. Synchronizing the optical network unit on the downlink wavelength channel, thereby simplifying the downlink wavelength switching process, reducing the switching error probability, and improving the system traffic. Optionally, as an embodiment, the transmitter 85 is further configured to: send, according to the wavelength switching completion message, a wavelength switching success message to the ONU on the target downlink wavelength channel, where the wavelength switching success message is used to indicate the optical line The terminal OLT confirms that the ONU downlink wavelength switching is successful.

Optionally, as an embodiment, the transmitter 85 is further configured to: when the wavelength switch complete message sent by the ONU is not received within the start and end time, send the same to the ONU only on the source downlink wavelength channel. Wavelength switching 4 吏 right message;

The receiver 84 is further configured to: receive, on the uplink wavelength channel, a wavelength switch incomplete message sent by the ONU according to the wavelength switching right message, where the wavelength switch incomplete message is used to indicate that the ONU is unsuccessful in the start and end time Switch to the target downstream wavelength.

Optionally, as an embodiment, the transmitter 85 is further configured to: send, according to the wavelength switching incomplete message, a wavelength switching unsuccessful message to the ONU on the source downlink wavelength channel, where the wavelength switching unsuccessful message is used The OLT is instructed to confirm that the ONU downlink wavelength switching is unsuccessful.

Optionally, as an embodiment, at least one of the wavelength switch request message, the wavelength switch acknowledgement message, the wavelength switch grant message, and the wavelength switch complete message is a multipoint control protocol (MPCP) message or an operation management maintenance. AM message.

It should be understood that the optical line terminal 80 according to the embodiment of the present invention may correspond to the OLT in the embodiment of the present invention, and may correspond to the optical line terminal 30 provided by the embodiment of the present invention, and the foregoing modules of the optical line terminal 80. And other operations and/or functions, respectively, in order to implement the corresponding processes of the method 500 in FIG. 7 to FIG. 11 , for brevity, no further details are provided herein.

As shown in FIG. 23, an embodiment of the present invention further provides an optical network unit ONU 90 in an EPON system. The optical network unit 90 includes a processor 91, a memory 92, a bus system 93, a receiver 94, and a transmitter 95. The processor 91, the memory 92, the receiver 94 and the transmitter 95 are connected by a bus system 93 for storing instructions for executing instructions stored in the memory 92 for controlling the receiver 94 to receive. Signal, and control transmitter 95 Send a signal;

The receiver 94 is configured to: receive, by using the source downlink downlink channel, a wavelength switch request message sent by the optical line terminal OLT, where the wavelength switch request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and the wavelength switch request is The message includes target wavelength information for indicating the downlink wavelength of the target, and switching time information for indicating the start and end time of the downlink wavelength switching. The transmitter 95 is configured to: switch the request message according to the wavelength on the fixed uplink wavelength channel. Sending a wavelength switch confirmation message to the OLT, where the wavelength switch confirmation message is used to indicate that the ONU determines to perform the downlink wavelength switch;

The receiver 94 is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive the wavelength switching authorization message sent by the OLT only on the target downlink wavelength channel corresponding to the target downlink wavelength. The wavelength switching authorization message is used to authorize the ONU;

The transmitter 95 is further configured to: send, on the uplink wavelength channel, a wavelength switch completion message to the OLT according to the wavelength switching message, where the wavelength switch completion message is used to indicate that the ONU successfully switches to the start and end time. The target downstream wavelength.

Optionally, as an embodiment, the receiver 94 is further configured to: receive, on the target downlink wavelength channel, a wavelength switch success message sent by the OLT according to the wavelength switch completion message, where the wavelength switch success message is used to indicate the The OLT confirms that the ONU downlink wavelength switching is successful.

Optionally, as an embodiment, the receiver 94 is further configured to: when the ONU fails to successfully switch to the target downlink wavelength within the start and end time, after the start and end time expires, receiving the OLT is only in the source downlink The wavelength switching 4 wavelength message sent on the wavelength channel;

The transmitter 95 is further configured to: send, on the uplink wavelength channel, a wavelength switch incomplete message to the OLT according to the wavelength switching message, where the wavelength switch incomplete message is used to indicate that the ONU is not in the start and end time. Successfully switched to the target downstream wavelength. Optionally, in an embodiment, the receiver 94 is further configured to: receive, on the source downlink wavelength channel, a wavelength switch unsuccessful message that is sent by the OLT according to the wavelength switching incomplete message, where the wavelength switching is unsuccessful message The OLT is instructed to confirm that the ONU downlink wavelength switching is unsuccessful.

Optionally, as an embodiment, at least one of the wavelength switch request message, the wavelength switch acknowledgement message, the wavelength switch grant message, and the wavelength switch complete message is a multipoint control protocol (MPCP) message or an operation management and maintenance OAM. Message.

It should be understood that the optical network unit 90 according to the embodiment of the present invention may correspond to the ONU in the embodiment of the present invention, and may correspond to the optical network unit 40 provided by the embodiment of the present invention, and the foregoing modules of the optical network unit 90. And other operations and/or functions, respectively, in order to implement the corresponding processes of the method 600 in FIG. 12 to FIG. 14 , for brevity, no further details are provided herein.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or can represent: eight exist alone, eight and ^ exist alone, and three exist separately. Kind of situation. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should be understood that determining B according to A does not mean that B is only determined according to A, but also can be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. Professionals can use different methods to implement the described functions for each specific application, but this implementation should not be considered super The scope of the invention is intended.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct connection or communication connection shown or discussed may be an indirect connection or communication connection through some interface, device or unit, or may be an electrical, mechanical or other form. connection. The components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. The medium of the code.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention. Modifications or substitutions, these modifications or substitutions should be covered by the scope of protection of the present invention within. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A device for registering an EPON system in an Ethernet passive optical network, the EPON system comprising an optical line terminal OLT and an optical network unit ONU, wherein the OLT and the ONU are based on multiple downlink wavelengths and one uplink wavelength Communicating, wherein the method includes: sending a windowing message to the ONU;

And receiving, by the ONU, a registration request message for requesting registration according to the windowing message, where the registration request message carries wavelength information of the ONU, where the wavelength information includes that the ONU receives the windowing message. Registered downstream wavelength used;

Transmitting a registration message to the ONU by using the registration downlink wavelength, the registration message includes receiving a registration confirmation message sent by the ONU according to the registration message for confirming completion of registration.

The method according to claim 1, wherein the registration message further includes length confirmation information, and the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

The method according to claim 1 or 2, wherein the discovery information field of the registration request message includes the wavelength information; or the registration request message includes a wavelength information field, where the wavelength information field includes Wavelength information.

The method according to any one of claims 1 to 3, wherein the wavelength information further includes downlink wavelength adjustment capability information of the ONU, and the downlink wavelength adjustment capability information includes at least one of the following information. One type: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

A method for registering a device in an EPON system of an Ethernet passive optical network, where the EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT and the ONU are based on multiple downlink wavelengths and one uplink wavelength. Communicating, the method includes: receiving a windowing message sent by the OLT;

Transmitting, according to the windowing message, a registration request message for requesting registration to the OLT, where the registration request message carries wavelength information of the ONU, where the wavelength information includes the ONU receiving the windowing message. Registered downstream wavelength used;

Receiving, by the registration downlink wavelength, a registration message sent by the OLT according to the registration request message, where the registration message includes a logical link identifier allocated by the OLT for the ONU LLID;

A registration confirmation message for confirming completion of registration is sent to the OLT according to the registration message.

The method according to claim 5, wherein the registration message further includes length confirmation information, and the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

The method according to claim 5 or 6, wherein the discovery information field of the registration request message includes the wavelength information; or the registration request message includes a wavelength information field, where the wavelength information field includes Wavelength information.

The method according to any one of claims 5 to 7, wherein the wavelength information further includes downlink wavelength adjustment capability information of the ONU, and the downlink wavelength adjustment capability information includes at least one of the following information. One type: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

A wavelength switching method in an EPON system of an Ethernet passive optical network, the EPON system comprising an optical line terminal OLT and an optical network unit ONU, wherein the OLT and the ONU are based on multiple downlink wavelengths and one uplink wavelength And performing the communication, the method includes: transmitting a wavelength switching request message to the optical network unit ONU on the source downlink wavelength channel, where the wavelength switching request message is used to indicate that the ONU switches to the target downlink wavelength, and The wavelength switching request message includes target wavelength information for indicating the target downlink wavelength, and switching time information for indicating a start and end time of the downlink wavelength switching;

Receiving, on the uplink wavelength channel, a wavelength switch confirmation message sent by the ONU according to the wavelength switch request message, where the wavelength switch confirmation message is used to instruct the ONU to determine to perform the downlink wavelength switch; to the ONU Sending a wavelength switching authorization message, where the wavelength switching authorization message is used to authorize the ONU;

Receiving, by the ONU, the wavelength switching completion message sent by the ONU according to the wavelength switching authorization message, when the ONU successfully switches to the target downlink wavelength in the start and stop time, the wavelength switching is completed. The message is used to indicate that the ONU successfully switches to the target downlink wavelength during the start and end time.

The method according to claim 9, wherein the method further comprises: performing, according to the wavelength switching completion message, the ONU on the target downlink wavelength channel The wavelength switching success message is sent, and the wavelength switching success message is used to indicate that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

The method according to claim 9, wherein the method further comprises: when the wavelength switching that is not received by the ONU is completed in the uplink and downlink channels, Receiving, by the ONU, a wavelength switching incomplete message sent according to the wavelength switching authorization message, where the wavelength switching incomplete message is used to indicate that the ONU does not successfully switch to the target downlink wavelength within the start and end time.

The method according to claim 11, wherein the method further comprises: sending, on the source downlink wavelength channel, a wavelength switching unsuccessful message to the ONU according to the wavelength switching incomplete message, where The wavelength switching unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

The method according to any one of claims 9 to 12, wherein the wavelength switching request message, the wavelength switching confirmation message, the wavelength switching authorization message, and the wavelength switching completion message are At least one of the messages is a Multipoint Control Protocol (MPCP) message or an Operations Management Maintenance OAM message.

A method for wavelength switching in an EPON system of an Ethernet passive optical network, the EPON system comprising an optical line terminal OLT and an optical network unit ONU, wherein the OLT and the ONU are based on multiple downlink wavelengths and one uplink wavelength And performing the communication, the method includes: receiving, on the source downlink wavelength channel, a wavelength switching request message sent by the optical line terminal OLT, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and The wavelength switching request message includes target wavelength information for indicating the target downlink wavelength, and switching time information for indicating a start and end time of the downlink wavelength switching;

Transmitting, on the uplink wavelength channel, a wavelength switch confirmation message to the OLT according to the wavelength switch request message, where the wavelength switch acknowledge message is used to instruct the ONU to determine to perform the downlink wavelength switch;

When the ONU successfully switches to the target downlink wavelength in the start and stop time, receiving an exchange authorization message, where the wavelength switching authorization message is used to authorize the ONU;

And transmitting, on the uplink wavelength channel, a wavelength switch completion message to the OLT according to the wavelength switching authorization message, where the wavelength switch completion message is used to indicate that the ONU is in the start and stop Successfully switched to the target downstream wavelength within the time.

The method according to claim 14, wherein the method further comprises: receiving, on the target downlink wavelength channel, a wavelength switching success message sent by the OLT according to the wavelength switching completion message, The wavelength switch success message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is successful.

The method according to claim 14, wherein the method further comprises: when the ONU fails to switch to the target downlink wavelength during the start and end time, after the start and end time expires, Receiving, by the OLT, the wavelength switching authorization message sent only on the source downlink wavelength channel;

And transmitting, on the uplink wavelength channel, a wavelength switch incomplete message to the OLT according to the wavelength switching grant message, where the wavelength switch incomplete message is used to indicate that the ONU does not successfully switch to the start time within the start and end time. Describe the target downstream wavelength.

The method according to claim 16, wherein the method further comprises: receiving, on the source downlink wavelength channel, a wavelength switching unsuccessful message that is sent by the OLT according to the wavelength switching incomplete message, The wavelength switching unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

The method according to any one of claims 14 to 17, wherein the wavelength switching request message, the wavelength switching confirmation message, the wavelength switching authorization message, and the wavelength switching completion message are At least one of the messages is a Multipoint Control Protocol (MPCP) message or an Operations Management Maintenance OAM message.

An optical line terminal OLT in an EPON system of an Ethernet passive optical network, the EPON system further comprising an optical network unit ONU, wherein the OLT communicates with the ONU based on a plurality of downlink wavelengths and an uplink wavelength The OLT includes:

a sending module, configured to send a windowing message to the ONU;

a receiving module, configured to receive a registration request message for requesting registration sent by the ONU according to the windowing message sent by the sending module, where the registration request message carries wavelength information of the ONU, the wavelength information Including the registered downlink wavelength used by the ONU to receive the windowing message;

The sending module is further configured to: send, by using the registered downlink wavelength, a registration message to the ONU, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU; The receiving module is further configured to: receive a registration confirmation message sent by the ONU according to the registration message sent by the sending module to confirm registration completion.

The optical line terminal according to claim 19, wherein the registration message sent by the sending module further includes wavelength confirmation information, and the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

The optical line terminal according to claim 19 or 20, wherein the discovery information field of the registration request message received by the receiving module includes the wavelength information; or the registration received by the receiving module The request message includes a wavelength information field, and the wavelength information field includes the wavelength information.

The optical line terminal according to any one of claims 19 to 21, wherein the wavelength information received by the receiving module further includes downlink wavelength adjustment capability information of the ONU, and the downlink wavelength adjustment The capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

23, an Ethernet passive optical network, an optical network unit ONU in the EPON system,

The EPON system further includes an optical line terminal OLT, and the OLT communicates with the ONU based on a plurality of downlink wavelengths and an uplink wavelength, wherein the ONU includes:

a receiving module, configured to receive a windowing message sent by the OLT;

a sending module, configured to send, according to the windowing message received by the receiving module, a registration request message for requesting registration to the OLT, where the registration request message carries wavelength information of the ONU, where the wavelength information includes The ONU receives the registered downlink wavelength used by the windowing message;

The receiving module is further configured to: receive a registration message that is sent by the OLT according to the registration request message sent by the sending module, where the registration message includes a logical link identifier LLID allocated by the OLT to the ONU;

The sending module is further configured to: send, according to the registration message received by the receiving module, a registration confirmation message for confirming completion of registration to the OLT.

The optical network unit according to claim 23, wherein the registration message received by the receiving module further includes wavelength confirmation information, and the wavelength confirmation information is used to instruct the OLT to confirm the wavelength information.

The optical network unit according to claim 23 or 24, wherein the transmitting The discovery information field of the registration request message sent by the module includes the wavelength information; or the registration request message sent by the sending module includes a wavelength information field, where the wavelength information field includes the wavelength information.

The optical network unit according to any one of claims 23 to 25, wherein the wavelength information sent by the sending module further includes downlink wavelength adjustment capability information of the ONU, and the downlink wavelength adjustment The capability information includes at least one of the following information: a downlink wavelength adjustment interval, a downlink wavelength number, a wavelength adjustment range of the tunable filter, an adjustment time of each downlink wavelength adjustment interval, and a downlink wavelength adjustment speed.

An optical line terminal OLT in an EPON system of an Ethernet passive optical network, the EPON system comprising an optical line terminal OLT and an optical network unit ONU, wherein the OLT and the ONU are based on multiple downlink wavelengths and one uplink The wavelength communication is performed, and the OLT includes: a request message, the wavelength switching request message is used to indicate that the ONU switches to a target downlink wavelength, and the wavelength switching request message includes Target wavelength information, and switching time information for indicating start and end times of downlink wavelength switching;

a receiving module, configured to receive, on the uplink wavelength channel, a wavelength switch confirmation message sent by the ONU according to the wavelength switching request message sent by the sending module, where the wavelength switching confirmation message is used to indicate the ONU Determining to perform the downlink wavelength switching;

The sending module is further configured to: send, in the start and end time, a wavelength switching 4 吏 right message to the ONU on a target downlink wavelength channel corresponding to the target downlink wavelength, where the wavelength switching authorization message is used. Authorizing the ONU;

The receiving module is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and stop time, receive, on the uplink wavelength channel, the wavelength switch that is sent by the ONU according to the sending module. The wavelength switch completion message sent by the message is used to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

The optical line terminal according to claim 27, wherein the sending module is further configured to: send, on the target downlink wavelength channel, a wavelength switching success message to the ONU according to the wavelength switching complete message The wavelength switching success message is used to indicate that the optical line terminal OLT confirms that the ONU downlink wavelength switching is successful.

The optical line terminal according to claim 27, wherein the transmitting module And the method further: when the wavelength switching completion message sent by the ONU is not received, the wavelength switching authorization message is sent to the ONU only on the source downlink wavelength channel;

The receiving module is further configured to: receive, on the uplink wavelength channel, a wavelength switching incomplete message sent by the ONU according to the wavelength switching message, where the wavelength switching incomplete message is used to indicate the ONU The target downstream wavelength is not successfully switched during the start and end time.

The optical line terminal according to claim 29, wherein the sending module is further configured to: send, on the source downlink wavelength channel, a wavelength switch to the ONU according to the wavelength switching incomplete message The success message, the wavelength switching unsuccessful message is used to instruct the OLT to confirm that the ONU downlink wavelength switching is unsuccessful.

The optical line terminal according to any one of claims 27 to 30, wherein the wavelength switching request message, the wavelength switching acknowledgement message, the wavelength switching grant message, and the wavelength switching complete message At least one of the messages is a Multipoint Control Protocol MPCP message or an Operation Management Maintenance OAM message.

32. An Ethernet passive optical network, an optical network unit ONU in the EPON system,

The EPON system includes an optical line terminal OLT and an optical network unit ONU, and the OLT communicates with the ONU based on a plurality of downlink wavelengths and an uplink wavelength, wherein the ONU includes:

a receiving module, configured to receive a wavelength switching request message sent by the optical line terminal OLT on the source downlink wavelength channel, where the wavelength switching request message is used to indicate that the optical network unit ONU switches to the target downlink wavelength, and the wavelength switching request message includes a target wavelength information for indicating the target downlink wavelength, and switching time information for indicating a start and end time of the downlink wavelength switching; a sending module, configured to receive, according to the receiving module, the uplink wavelength channel The wavelength switch request message is sent to the OLT, and the wavelength switch confirmation message is used to instruct the ONU to determine to perform the downlink wavelength switch.

The receiving module is further configured to: when the ONU successfully switches to the target downlink wavelength in the start and end time, receive the OLT to send on a target downlink wavelength channel corresponding to the target downlink wavelength. The wavelength switching is performed, and the wavelength switching message is used to perform 4 authorization on the ONU.

The sending module is further configured to: send, on the uplink wavelength channel, a wavelength switching complete message to the OLT according to the wavelength switching message received by the receiving module, where the wavelength is cut The change completion message is used to indicate that the ONU successfully switches to the target downlink wavelength within the start and end time.

The optical network unit according to claim 32, wherein the receiving module is further configured to: receive, on the target downlink wavelength channel, a wavelength switch successfully sent by the OLT according to the wavelength switching completion message The message, the wavelength switching success message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is successful.

The optical network unit according to claim 32, wherein the receiving module is further configured to: when the ONU fails to successfully switch to the target downlink wavelength during the start and end time, at the starting and ending After the timeout expires, receiving the wavelength switching authorization message sent by the OLT only on the source downlink wavelength channel;

The sending module is further configured to: send, on the uplink wavelength channel, a wavelength switch incomplete message to the OLT according to the wavelength switching authorization message, where the wavelength switch incomplete message is used to indicate that the ONU is in the The target downstream wavelength was not successfully switched during the start and end time.

The optical network unit according to claim 34, wherein the receiving module is further configured to: receive, on the source downlink wavelength channel, a wavelength switch that is sent by the OLT according to the wavelength switching incomplete message The unsuccessful message is used to indicate that the OLT confirms that the ONU downlink wavelength switching is unsuccessful.

The optical network unit according to any one of claims 32 to 35, wherein the wavelength switching request message, the wavelength switching acknowledgement message, the wavelength switching grant message, and the wavelength switching complete message At least one of the messages is a Multipoint Control Protocol MPCP message or an Operation Management Maintenance OAM message.