CN105830369A - Method and apparatus for device registration and wavelength switching in ethernet passive optical network system - Google Patents

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 APPARATUS FOR DEVICE REGISTRATION AND WAVELENGTH SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORK SYSTEM

The method and apparatus technical field that Ethernet passive optical network devices in system is registered and wavelength switches

The present invention relates to the method and apparatus that the registration of the Ethernet passive optical network devices in system in optical communication field, more particularly to optical communication field and wavelength switch.Background technology

With developing rapidly for optical communication technique, EPON（Passive Optical Network, referred to as " PON ") application of the system in optical communication technique be more and more wider.PON system can include time division multiplexing（Time Division Multiplexing, referred to as " TDM ") PON, gigabit passive optical network（Gigabit Passive Optical Network, referred to as " GPON "), Ethernet passive optical network（Ethernet Passive Optical Network, referred to as ' Ρ Ο Ν "), time-division wavelength-division multiplex（Time Wavelength Division Multiplexing, referred to as " TWDM ") PON, point-to-point（Point to Point, referred to as " PtP ") wavelength-division multiplex（Wavelength Division Multiplexing, referred to as " WDM ") PON etc..

For each type of PON system, the PON system can include：Optical line terminal positioned at central office（Optical Line Terminal, referred to as " OLT ") include the Optical Distribution Network of Passive Optical Components（Optical Distribution Network, referred to as " ODN ") and positioned at the optical network unit of user terminal（Optical Network Unit, referred to as " ONU ")/ONT Optical Network Terminal (Optical Network Terminal, referred to as ' Ν Τ "), wherein it is possible to refer to ONU and/or ONT with ONU.

In order to improve the capacity of PON systems, International Telecommunication Union's telecommunication standards group（ITU Telecommunication Standardization Sector, referred to as " ITU-T ", wherein, International Telecommunication Union are referred to as " ITU ") propose a kind of Ethernet passive optical network referred to as of future generation（Communication system Next Generation-EPON, referred to as " NG-EPON "), the network architecture that the NG-EPON systems may be communicated using multiple downstream wavelengths and a upstream wavelength.But in the NG-EPON systems, the method switched without existing facility registration and wavelength can be applicable the network architecture.

Therefore, in Ethernet passive optical network system of future generation, how to carry out facility registration and wavelength switching is current urgent problem to be solved. The content of the invention

In view of this, the embodiments of the invention provide the method and apparatus that a kind of registration of Ethernet passive optical network devices in system and wavelength switch, facility registration and wavelength switching can be carried out in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength.

First aspect, a kind of method registered there is provided Ethernet passive optical network EPON devices in system, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, this method includes：Windowing message is sent to the ONU；The login request message for being used to ask registration that the ONU is sent according to the windowing message is received, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；Registration message is sent to the ONU by the registration downstream wavelength, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;Receive the registration confirmation message for being used to confirm to complete registration that the ONU is sent according to the registration message.

With reference in a first aspect, in the first possible implementation of first aspect, the registration message also includes wavelength confirmation, the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

With reference to the first possible implementation of first aspect, first aspect, in second of possible implementation of first aspect, the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

With reference to the first or second of possible implementation of first aspect or first aspect, in the third possible implementation of first aspect, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

Second aspect, a kind of method registered there is provided Ethernet passive optical network EPON devices in system, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, this method includes：Receive the windowing message of OLT transmissions；According to the windowing message, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；The registration message that the OLT is sent according to the login request message is received, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;Sent according to the registration message to the OLT for confirming that the registration for completing registration is true Recognize message.

With reference to second aspect, in the first possible implementation of second aspect, the registration message also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

With reference to the first possible implementation of second aspect, second aspect, in second of possible implementation of second aspect, the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

With reference to the first or second of possible implementation of second aspect or second aspect, in the third possible implementation of second aspect, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

The third aspect, a kind of method switched there is provided Ethernet passive optical network EPON systems medium wavelength, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, this method includes：Changing request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；On the upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；Within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU on target downlink wavelength channel corresponding with the target downlink wavelength, the wavelength handover grant message is used to authorize the ONU；When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the ONU is received on the upstream wavelength passage the 4 wavelength handoff completion messages for being authorized message transmission is switched according to the wavelength, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

With reference to the third aspect, in the first possible implementation of the third aspect, this method also includes：On the target downlink wavelength channel, wavelength is sent to the ONU according to the wavelength handoff completion message and switches successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

With reference to the third aspect, in second of possible implementation of the third aspect, this method also includes：When being not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, only exist On the source downstream wavelength passage wavelength handover grant message is sent to the ONU；On the upstream wavelength passage, the wavelength switching outstanding message that the ONU is sent according to the wavelength handover grant message is received, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

With reference to second of possible implementation of the third aspect, in the third possible implementation of the third aspect, this method also includes：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms ONU downstream wavelengths switching not successfully.

With reference to the third aspect or the third aspect the first to the possible implementation of any of the third possible implementation, in the 4th kind of possible implementation of the third aspect, it is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management that the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength, which switch 4 officials power at least one of message and the wavelength handoff completion message message,.

Fourth aspect, a kind of method switched there is provided Ethernet passive optical network EPON systems medium wavelength, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, this method includes：The wavelength handover request message that optical line terminal OLT is sent is received on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；On the upstream wavelength passage, wavelength switch acknowledgment message is sent to the OLT according to the wavelength handover request message, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength switching 4 officials power message that the OLT is sent on target downlink wavelength channel corresponding with the target downlink wavelength is received, the wavelength, which switches 4 officials power message, to be used to authorize the ONU；On the upstream wavelength passage, wavelength handoff completion message is sent to the OLT according to the wavelength handover grant message, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

With reference to fourth aspect, in the first possible implementation of fourth aspect, this method also includes：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

With reference to fourth aspect, in second of possible implementation of fourth aspect, this method also includes： When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength handover grant message that the OLT is only sent on the source downstream wavelength passage is received；On the upstream wavelength passage, 4 officials are switched according to the wavelength and weigh message to OLT transmission wavelength switching outstanding messages, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

With reference to second of possible implementation of fourth aspect, in the third possible implementation of fourth aspect, this method also includes：On the source downstream wavelength passage, receive the OLT and the failed message of wavelength switching that outstanding message is sent is switched according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms that ONU downstream wavelengths switching is failed.

With reference to fourth aspect or fourth aspect the first to the possible implementation of any of the third possible implementation, in the 4th kind of possible implementation of fourth aspect, it is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management that the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength, which switch 4 officials power at least one of message and the wavelength handoff completion message message,.

5th aspect, there is provided the optical line terminal OLT in a kind of Ethernet passive optical network EPON systems, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, the EPON system also includes optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, the OLT includes：Sending module, for sending windowing message to the ONU；Receiving module, for receiving the login request message for being used to ask registration that the ONU is sent according to the windowing message that the sending module is sent, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；Wherein, the sending module is additionally operable to：The login request message received according to the receiving module, sends registration message, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT, to the ONU；The receiving module is additionally operable to：Receive the registration confirmation message for being used to confirm to complete registration for the registration message transmission that the ONU is sent according to the sending module.

With reference to the 5th aspect, in the first possible implementation of the 5th aspect, the registration message that the sending module is sent also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

With reference to the 5th aspect, the first possible implementation of the 5th aspect, in second of possible implementation of the 5th aspect, the discovery information field for the login request message that the receiving module is received includes the wavelength information；Or the login request message that the receiving module is received includes wavelength information domain, the wavelength Information field includes the wavelength information.

Any of the first or second possible implementation with reference to the 5th aspect or the 5th aspect possible implementation, in the third possible implementation of the 5th aspect, the wavelength information that the receiving module is received also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

6th aspect, there is provided the optical network unit ONU in a kind of Ethernet passive optical network EPON systems, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, the EPON system also includes optical line terminal OLT, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, the ONU includes：Receiving module, the windowing message for receiving OLT transmissions；Sending module, for the windowing message received according to the receiving module, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；The receiving module is additionally operable to：The registration message that the OLT is sent according to the login request message that the sending module is sent is received, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;The sending module is additionally operable to：The registration message received according to the receiving module sends the registration confirmation message for confirming to complete to register to the OLT.

With reference to the 6th aspect, in the first possible implementation of the 6th aspect, the registration message that the receiving module is received also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

With reference to the 6th aspect, the first possible implementation of the 6th aspect, in second of possible implementation of the 6th aspect, the discovery information field for the login request message that the sending module is sent includes the wavelength information；Or the login request message that the sending module is sent includes wavelength information domain, the wavelength information domain includes the wavelength information.

With reference to the first or second of possible implementation of the 6th aspect or the 6th aspect, in the third possible implementation of the 6th aspect, the wavelength information that the sending module is sent also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed. 7th aspect, there is provided the optical line terminal OLT in a kind of Ethernet passive optical network EPON systems, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, the OLT includes：Message, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；Receiving module, for in the upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message that the sending module is sent is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；Wherein, the sending module is additionally operable to：Within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU on target downlink wavelength channel corresponding with the target downlink wavelength, the wavelength handover grant message is used to authorize the ONU；The receiving module is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, receive the wavelength handoff completion message that the ONU is sent according to the wavelength handover grant message that the sending module is sent on the upstream wavelength passage, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

With reference to the 7th aspect, in the first possible implementation of the 7th aspect, the sending module is additionally operable to：On the target downlink wavelength channel, wavelength is sent to the ONU according to the wavelength handoff completion message and switches successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

With reference to the 7th aspect, in second of possible implementation of the 7th aspect, the sending module is additionally operable to：When being not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, only the wavelength handover grant message is sent to the ONU on the source downstream wavelength passage；The receiving module is additionally operable to：On the upstream wavelength passage, the wavelength switching outstanding message that the ONU is sent according to the wavelength handover grant message is received, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

With reference to second of possible implementation of the 7th aspect, in the third possible implementation of the 7th aspect, the sending module is additionally operable to：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms ONU downstream wavelengths switching not successfully.

With reference to the 7th aspect or the first any into the third possible implementation of the 7th aspect Plant possible implementation, in the 4th kind of possible implementation of the 7th aspect, it is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management that the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength, which switch 4 officials power at least one of message and the wavelength handoff completion message message,.

Eighth aspect, there is provided the optical network unit ONU in a kind of Ethernet passive optical network EPON systems, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, wherein, the ONU includes：Receiving module, for receiving the wavelength handover request message that optical line terminal OLT is sent on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；Sending module, for in the upstream wavelength passage, the wavelength handover request message received according to the receiving module sends wavelength switch acknowledgment message to the OLT, and the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；Wherein, the receiving module is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength switching 4 officials power message that the OLT is sent on target downlink wavelength channel corresponding with the target downlink wavelength is received, the wavelength, which switches 4 officials power message, to be used to authorize the ONU；The sending module is additionally operable to：On the upstream wavelength passage, the wavelength handover grant message received according to the receiving module sends wavelength handoff completion message to the OLT, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

With reference to eighth aspect, in the first possible implementation of eighth aspect, the receiving module is additionally operable to：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

With reference to eighth aspect, in second of possible implementation of eighth aspect, the receiving module is additionally operable to：When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength handover grant message that the OLT is only sent on the source downstream wavelength passage is received；The sending module is additionally operable to：On the upstream wavelength passage, wavelength switching outstanding message is sent to the OLT according to the wavelength handover grant message, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

With reference to second of possible implementation of eighth aspect, in the third possible implementation of eighth aspect, the receiving module is additionally operable to：On the source downstream wavelength passage, receive the OLT according to The wavelength that wavelength switching outstanding message is sent switches failed message, and the wavelength, which switches failed message, to be used to indicate that the OLT confirms that ONU downstream wavelengths switching is failed.

With reference to eighth aspect or eighth aspect the first to the possible implementation of any of the third possible implementation, in the 4th kind of possible implementation of eighth aspect, it is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management that the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength, which switch 4 officials power at least one of message and the wavelength handoff completion message message,.

Based on above-mentioned technical proposal, the method and apparatus of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal；On the other hand, the method and apparatus of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, downstream wavelength switching can be being carried out within the switching beginning and ending time with target downlink glistening light of waves NE, and optical line terminal can be avoided to synchronize mandate to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the volume of business of system can be improved.Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in the embodiment of the present invention will be briefly described below, apparently, drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of schematic diagram of application scenarios of the embodiment of the present invention；

Fig. 2 is the indicative flowchart of the method for facility registration provided in an embodiment of the present invention；Fig. 3 A and 3B are the schematic diagrams of login request message provided in an embodiment of the present invention；Fig. 4 is the schematic diagram of registration message provided in an embodiment of the present invention；

Fig. 5 is the indicative flowchart of the method for the facility registration that another embodiment of the present invention is provided；Fig. 6 is the indicative flowchart of the method for the facility registration that yet another embodiment of the invention is provided；Fig. 7 is the indicative flowchart of the method for wavelength switching provided in an embodiment of the present invention； Fig. 8 A and 8B are the schematic diagram of the regulation control message provided in an embodiment of the present invention based on MPCP agreements and governing response message respectively；

Fig. 9 A and 9B are the schematic diagram of the regulation control message provided in an embodiment of the present invention based on OAM agreements and governing response message respectively；

Figure 10 is another indicative flowchart of the method for wavelength switching provided in an embodiment of the present invention；Figure 11 is another indicative flowchart of the method for wavelength switching provided in an embodiment of the present invention；Figure 12 is the indicative flowchart of the method for the wavelength switching that another embodiment of the present invention is provided；Figure 13 is another indicative flowchart of the method for the wavelength switching that another embodiment of the present invention is provided；Figure 14 is another indicative flowchart of the method for the wavelength switching that another embodiment of the present invention is provided；Figure 15 is the indicative flowchart of the method for the wavelength switching that yet another embodiment of the invention is provided；Figure 16 is the schematic block diagram of optical line terminal provided in an embodiment of the present invention；

Figure 17 is the schematic block diagram of optical network unit provided in an embodiment of the present invention；

Figure 18 is the schematic block diagram for the optical line terminal that another embodiment of the present invention is provided；

Figure 19 is the schematic block diagram for the optical network unit that another embodiment of the present invention is provided；

Figure 20 is the schematic block diagram for the optical line terminal that yet another embodiment of the invention is provided；

Figure 21 is the schematic block diagram for the optical network unit that yet another embodiment of the invention is provided；

Figure 22 is the schematic block diagram for the optical line terminal that yet another embodiment of the invention is provided；

Figure 23 is the schematic block diagram for the optical network unit that yet another embodiment of the invention is provided.Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made should all belong to the scope of protection of the invention.

Fig. 1 shows a kind of application scenarios provided in an embodiment of the present invention.As shown in figure 1, the EPON systems can include EPON OLT and one or more EPON ONU, the EPON OLT can pass through optical splitter（Optical Splitter, referred to as " OS ") be connected with one or more EPON ONU optical fiber, wherein, communicated between the EPON OLT and the EPON ONU based on multiple downstream wavelengths and a upstream wavelength.

The EPON OLT are, for example, NG-EPON OLT, or the EPON OLT can also be other

OLT, the OLT have multiple launch wavelengths and a reception wavelength.As shown in figure 1, the EPON ONU is, for example, n EPON ONU, i.e. EPON ONU 1 to EPON ONU n, and wherein n is natural number；The reception Wavelength tunable but launch wavelength of the EPON ONU is fixed, the EPON ONU are such as can include one or more 1G EPON ONU, one or more 10G EPON ONU, one or more NG EPON ONU, but the embodiment of the present invention is not limited to this.

It should be understood that in embodiments of the present invention, the optical signal of data or carrying data is transferred to from OLT

ONT/ONU transmission direction is referred to as down direction, correspondingly, and OLT is also referred to as downstream wavelength passage to the ONT/ONU passages for sending optical signal；Similarly, the optical signal of data or carrying data is transferred to OLT transmission direction referred to as up direction from ONT/ONU；Correspondingly, ONT/ONU is also referred to as upstream wavelength passage to the OLT passages for sending optical signal.

It will also be understood that, the embodiment of the present invention is only illustrated by taking the up EPON system of the descending unicast of four ripples as an example, illustrated by taking the EPON system with four downstream wavelength passages and a upstream wavelength passage as an example, but the present invention is not limited thereto, facility registration according to embodiments of the present invention and the method and its device of wavelength switching, other EPON systems with multiple downstream wavelength passages and a upstream wavelength passage, and the EPON systems with multiple downstream wavelength passages and multiple upstream wavelength passages can also be applied to.In addition, for convenience, will hereinafter be illustrated with ONU instead of ONT and/or ONU, but the present invention is not limited thereto.

Fig. 2 shows the indicative flowchart of the method 100 of facility registration in EPON system provided in an embodiment of the present invention, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, this method 100 can be performed by OLT, for example, this method 100 is performed by NG-EPON OLT.As shown in Fig. 2 this method 100 includes：

S 110, windowing message is sent to the ONU；

S120, receives the login request message for being used to ask registration that the ONU is sent according to the windowing message, and the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；

S130, sends registration message, it is the logical links mark (Logical Link Identifier, referred to as " LLID ") that the ONU is distributed that the registration message, which includes the OLT, by the registration downstream wavelength to the ONU;

S140, receives the registration confirmation message for being used to confirm to complete registration that the ONU is sent according to the registration message.

Specifically, the EPON system of row of channels is being entered using multiple downstream wavelengths and a upstream wavelength In, such as OLT is to ONU broadcast transmissions windowing message, for asking whether that the ONU newly added needs to be registered.If now just there is the ONU newly added to need to be registered, when so ONU receives the windowing message of OLT broadcast transmissions, just can be to OLT broadcast transmission login request messages, the login request message is used to ask to register to OLT, and the login request message carries wavelength information, the wavelength information can indicate that the ONU receives the registration downstream wavelength that the windowing message is used.OLT is received after the wavelength information of ONU transmissions, and can be sent to the ONU includes LLID registration message；The ONU is received after the registration message that OLT is issued, corresponding location registration process can be carried out, it is possible to send registration confirmation message to OLT, for indicating that the ONU completes registration to OLT, so as to which in the EPON system, row data communication can be entered between the OLT and the ONU.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Specifically, in S110, OLT sends windowing message to ONU.For example, OLT can be by way of broadcast to ONU transmission windowing message.The windowing message is, for example, to be based on Multi-point Control Protocol（Multi-Point Control Protocol, referred to as " MPCP ") GATE message, the GATE message be used for ONU is authorized, to enable the ONU for receiving the GATE message to send information immediately or within a specified time.

In embodiments of the present invention, the GATE message can include source address, destination address and message content, and the message content can for example include at least one of following message information：Power（Grant) information, lock in time（Sync Time) information and find information（Discovery Information), but the present invention is not limited thereto.

In S120, OLT receives the login request message that the ONU is sent according to the windowing message, and the wavelength information that the login request message is carried receives the registration downstream wavelength that the windowing message is used including the ONU.

In embodiments of the present invention, ONU is carried out after self calibration, can will receive one of wavelength regulation into multiple downstream wavelengths, i.e. ONU receives the registration downstream wavelength that the windowing message is used, and the registration downstream wavelength can be reported OLT, to carry out facility registration.

In embodiments of the present invention, alternatively, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Down going wave Long control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

I.e. in embodiments of the present invention, ONU can be by its downstream wavelength regulating power information reporting to OLT, in order to which OLT can know ONU relevant information completely to carry out subsequent operation.For example, OLT according to ONU downstream wavelength regulating power information, can determine target downlink wavelength of downstream wavelength switching etc..

In embodiments of the present invention, the login request message is, for example, the REGISTER_REQ message based on MPCP, and the REGISTER_REQ message is used to ask to register to OLT, and the REGISTER_REQ message carries the wavelength information.In embodiments of the present invention, the REGISTER_REQ message can include source address, destination address and message content, and the message content can also for example include at least one of following message information in addition to including wavelength information：4 are waited to be authorized (Pending Grants) information, find information（Discovery Information), the laser opening time（Laser On Time) information and laser shutdown time（Laser Off Time) information, but the present invention is not limited thereto.

In embodiments of the present invention, can be by extending the frame structure of REGISTER_REQ message, to carry the wavelength information.Alternatively, the discovery information of the login request message（Discovery Information) domain（Field the wavelength information) is included；Or the login request message includes wavelength information (Wavelength Information) i or, wavelength information i or including the wavelength information.

Below in conjunction with Fig. 3 A and 3B, above-mentioned login request message is described respectively.

Fig. 3 A show a kind of frame structure of registration request REGISTER_REQ message provided in an embodiment of the present invention, wherein, the discovery information field of the REGISTER_REQ message carries the wavelength information.As shown in Fig. 3 A, command code（Opcode) 0001 presentation medium Access Control（Media Access Control, referred to as " MAC ") function for pause（PAUSE), i.e., the message that command code is 0001 is pause（PAUSE) message；Similarly, the message that command code is 0002 is windowing（GATE) message；The message that command code is 0003 is report（REPORT) message；The message that command code is 0004 is registration request（REGISTER_REQ) message；The message that command code is 0005 is registration (REGISTER) message；The message that command code is 0006 is accreditation verification (REGISTER_ACK) message.

Wherein, the REGISTER_REQ message can include：Destination address (Destination Address, referred to as " DA ") domain of 6 bytes, the source address of 6 bytes（Source Address, referred to as " SA ") domain, the length of 2 bytes（Length)/type（Type) domain, 2 bytes Command code（Opcode) domain, timestamp (Timestamp) domain of 4 bytes, the mark of 1 byte（Flags) domain, the wait mandate of 1 byte（Pending Grants) domain, the discovery information of 2 bytes（Discovery Information) domain, the laser opening time of 1 byte（Laser On Time) domain, the laser shutdown time of 1 byte（Laser Off Time) domain, the filling of 32 bytes（Pad) the Frame Check Sequence of domain and 4 bytes（Frame Check Sequence, referred to as " FCS ") domain.

Wherein, each bit in the Discovery Information domains can represent 1G uplink capacities information, 10G uplink capacities information, information is attempted in 1G registrations or information is attempted in 10G registrations；In addition, the bit in the Discovery Information domains can be used to indicate that registration downstream wavelength, and it can be also used for representing the one or more in following wavelength information：The regulating time information of downstream wavelength control interval information, down going wave long number information, downstream wavelength adjustable range information and downstream wavelength per control interval etc..I.e. in embodiments of the present invention, the Discovery Information domains of REGISTER_REQ message can be extended so that the reservation bit position in the Discovery Information domains may be used to indicate that the wavelength information of the ONU.

Fig. 3 B show another frame structure of registration request REGISTER_REQ message provided in an embodiment of the present invention, wherein, command code is that 0004 registration request REGISTER_REQ message may also include, for example the wavelength information of 2 bytes（Wavelength Information) domain, the one or more in the Wavelength wavelength informations：The regulating time information of downstream wavelength control interval information, down going wave long number information, downstream wavelength adjustable range information and downstream wavelength per control interval etc..I.e. in embodiments of the present invention, a Wavelength Information domain can be newly increased in REGISTER_REQ message, the bit in the Wavelength Information domains is used for the wavelength information for indicating the ONU.

It should be understood that the embodiment of the present invention is only illustrated by taking the frame structure shown in Fig. 3 A and Fig. 3 B as an example, but the present invention is not limited thereto, for example, ONU wavelength information can also be carried in other domains of REGISTER_REQ message or other reserved fields；In another example, wavelength information domain can have more byte numbers etc..

In S130, OLT can send registration message, it is the LLID that the ONU is distributed that the registration message, which includes the OLT, according to the login request message by broadcasting to the ONU.

It should be understood that in embodiments of the present invention, LLID is a kind of Digital ID that EPON system distributes to logical links, each logical links can be allocated different LLID.In EPON system, OLT can distinguish that the frame of reception is sent by which ONU by LLID, similarly, and the frame can also be sent at corresponding ONU by OLT by changing the LLID in frame.Thus, it is possible to set up Corresponding relation between OLT and ONU, and can be communicated.

In embodiments of the present invention, alternatively, the registration message also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.Specifically, for example, the wavelength confirmation can include registration downstream wavelength confirmation, for indicating that OLT confirms the registration downstream wavelength.In another example, the wavelength confirmation can also include downstream wavelength regulating power confirmation, and the downstream wavelength regulating power confirmation includes the confirmation at least one of following message information：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

Specifically, in embodiments of the present invention, the registration message is, for example, the REGISTER message based on MPCP, and the REGISTER message is used to be that the ONU demonstrate,proved by registering an ancient attendants in charge of cart and horses for aristocrats distributes LLID.In embodiments of the present invention, the REGISTER message can include source address, destination address and message content, and the message content can also for example include at least one of following message information in addition to including LLID：Lock in time（Sync Time) information, wait authorize confirmation（Echo of Pending Grants) information, the target laser opening time（Target Laser On Time) information, the target laser shut-in time（Target Laser Off Time) information and wavelength confirmation（Echo of Wavelength Information), but the present invention is not limited thereto.

In embodiments of the present invention, can be by extending the frame structure of REGISTER message, to carry the wavelength confirmation.Below by by taking the frame structure shown in Fig. 4 as an example, detailed description includes the registration REGISTER message of wavelength confirmation.

As shown in Fig. 4, the message that command code is 0005 is registration（REGISTER) message, should

REGISTER message can for example include：The destination address of 6 bytes（Destination Address, referred to as " DA ") domain, the source address of 6 bytes（Source Address, referred to as " SA ") domain, length (Length)/type of 2 bytes（Type) domain, the command code of 2 bytes（Opcode) domain, the timestamp of 4 bytes（Timestamp) domain, the distribution port of 2 bytes（Assigned Port) domain, the mark of 1 byte（Flags) domain, the lock in time of 2 bytes（Sync Time) domain, wait license confirmation (Echoed Pending Grants) domain of 1 byte, the target laser opening time of 1 byte（Target Laser On Time) domain, the target laser shut-in time of 1 byte（Target Laser Off Time) domain, the wavelength confirmation of 2 bytes（Echoed Wavelength Information) domain, the filling of 32 bytes（Pad) the Frame Check Sequence of domain and 4 bytes（Frame Check Sequence, referred to as " FCS ").

Wherein, each bit in the Echoed Wavelength Information domains can represent downstream wavelength The regulating time confirmation of confirmation, downstream wavelength control interval confirmation, down going wave long number confirmation, downstream wavelength adjustable range confirmation and downstream wavelength per control interval.

It should be understood that, the embodiment of the present invention is only illustrated 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 can also be carried in other message, or is carried in other domains of REGISTER message or other reserved fields.

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

It should be understood that within the time that ONU carries out pertinent registration processing according to registration message, OLT periodically or periodically can send GATE message to ONU, wait ONU to complete pertinent registration processing.ONU is completed after pertinent registration processing, can send registration confirmation message to OLT, to confirm to complete registration.

Specifically, in embodiments of the present invention, the registration confirmation message is, for example, the REGISTER_ACK message based on MPCP, and the REGISTER_ACK message can include source address, destination address and message content, and the message content can also for example include lock in time confirmation（Echo of Sync Time) information and/or LLID confirm（Echo of LLID) information.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

It should be understood that, the present invention is only illustrated by taking the application scenarios shown in Fig. 1 as an example, but the present invention is not limited thereto, for example, the method of facility registration in EPON system provided in an embodiment of the present invention, can also be applied to the EPON system communicated using multiple downstream wavelengths and multiple upstream wavelengths.

It will also be understood that, in embodiments of the present invention, the login request message that ONU is sent to OLT is in addition to the downstream wavelength information that can carry ONU, ONU upstream wavelength information can also be included, for example, upstream wavelength, upstream wavelength regulating power information etc. are registered, the upstream wavelength regulating power information is for example including at least one of following message：Upstream wavelength control interval, upgoing wave long number, upstream wavelength adjustable range, the regulating time of each upstream wavelength control interval and upstream wavelength governing speed.

It will also be understood that, in embodiments of the present invention, the registration message that OLT is sent to ONU can also include the information that OLT is confirmed to upstream wavelength information, for example, upstream wavelength confirmation, upstream wavelength regulating power confirmation etc. are registered, the upstream wavelength regulating power confirmation is for example including under The confirmation of at least one of column information：Upstream wavelength control interval, upgoing wave long number, upstream wavelength adjustable range, the regulating time of each upstream wavelength control interval and upstream wavelength governing speed.

It will also be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal；In addition, this method according to embodiments of the present invention can also reduce the error probability during facility registration, to provide a kind of more rigorous, more specification, more efficient facility registration mechanism.

Above in conjunction with Fig. 2 to Fig. 4, the method 100 of EPON devices in system registration according to embodiments of the present invention is described in detail from OLT sides, below in conjunction with Fig. 5, the method 200 of facility registration from ONU sides detailed description EPON system according to embodiments of the present invention.

As shown in Figure 5, show the method 200 of facility registration in EPON system according to embodiments of the present invention, the EPON system includes optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, this method 200 can be performed by ONU, for example, this method 200 can be performed by NG-EPON ONU, 1G EPON ONU or 10G EPON ONU.

As shown in figure 5, this method 200 includes：

S210, receives the windowing message of OLT transmissions；

S220, according to the windowing message, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；

S230, receives the registration message that the OLT is sent according to the login request message, and it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;

S240, the registration confirmation message for confirming to complete to register is sent to the OLT according to the registration message.

Specifically, enter using multiple downstream wavelengths and a upstream wavelength in the EPON system of row of channels, OLT for example sends windowing message by broadcasting to ONU, for asking whether what is newly added ONU needs to be registered.If the ONU newly added needs to be registered, when so ONU receives the windowing message of OLT broadcast transmissions, just can be according to the windowing message to the OLT broadcast transmission login request messages, the login request message is used to ask to register to OLT, and the login request message carries wavelength information, the wavelength information can indicate that the ONU receives the registration downstream wavelength that the windowing message is used.OLT is received after the wavelength information of ONU transmissions, and can be sent to the ONU includes LLID registration message；The ONU is received after the registration message that OLT is issued, corresponding location registration process can be carried out, it is possible to send registration confirmation message to OLT, for indicating that the ONU completes registration to OLT, so as to which in the EPON system, row data communication can be entered between the OLT and the ONU.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

In embodiments of the present invention, alternatively, the registration message also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

In embodiments of the present invention, alternatively, the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

In embodiments of the present invention, alternatively, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

In embodiments of the present invention, alternatively, the wavelength information also includes the upstream wavelength and/or upstream wavelength regulating power information of the ONU, and the upstream wavelength regulating power information includes at least one of following message：Upstream wavelength control interval, upgoing wave long number, upstream wavelength adjustable range, the regulating time of each upstream wavelength control interval and upstream wavelength governing speed.

It should be understood that in embodiments of the present invention, the windowing message is, for example, the GATE message based on MPCP；The login request message is, for example, the REGISTER_REQ message based on MPCP；The registration message is, for example, the REGISTER message based on MPCP；The registration confirmation message is, for example, the REGISTER_ACK message based on MPCP.Above above-mentioned message is described in detail with reference to Fig. 2 to Fig. 4, for sake of simplicity, will not be repeated here. It will also be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Below in conjunction with Fig. 6, the method to facility registration in EPON system provided in an embodiment of the present invention is described in detail.

As shown in fig. 6, in S310, OLT is to ONU broadcast transmission GATA message, for asking whether that the ONU newly added needs to be registered.The GATA message can for example include：Source address（SA), destination address（DA), authorize（Grant) information, lock in time（Sync Time) information and find information (Discovery Information).

In S320, ONU, should to OLT broadcast transmission REGISTER_REQ message

REGISTER_REQ message is used to ask to register to OLT, and the REGISTER_REQ message carries wavelength information.The REGISTER_REQ message can for example include：Source address（SA), destination address（DA), wait and authorizing（Pending Grants) information, find information（Discovery Information), the laser opening time（Laser On Time) information, the laser shutdown time（Laser Off Time) information and wavelength information（ Wavelength Information ).

In S330, OLT is to ONU broadcast transmission REGISTER message, and the REGISTER message includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.The REGISTER message can for example include：Source address（SA), destination address（DA), LLID, lock in time（Sync Time) information, wait authorize confirmation（Echo of Pending Grants) information, the target laser opening time（Target Laser On Time) information, the target laser shut-in time（Target Laser Off Time) information and wavelength confirmation (Echo of Wavelength Information).

In S340, OLT sends GATA message to ONU unicasts, to be authorized to ONU.The GATA message can for example include：Source address（SA), destination address（DA) and authorize（ Grant ).

In S350, ONU sends REGISTER_ACK message to OLT unicasts, and the REGISTER_ACK message is used to indicate that ONU has completed registration to OLT.The REGISTER_ACK message can for example include：Source address（SA), destination address（DA it is), same The step time confirms that (Echo of Sync Time) information and LLID confirm（Echo of LLID) information.It should be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network devices in system registration of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Above in conjunction with Fig. 2 to Fig. 6, the method that facility registration in EPON system provided in an embodiment of the present invention is described in detail, below in conjunction with Fig. 7 to Figure 15, the method that EPON system medium wavelength switching provided in an embodiment of the present invention is described in detail.

Fig. 7 shows the indicative flowchart of the method 500 of EPON system medium wavelength switching provided in an embodiment of the present invention, and this method 500 can be performed by OLT, for example, this method 500 is performed by NG-EPON OLT.As shown in fig. 7, this method 500 includes：The wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

S520, on fixed upstream wavelength passage, receives the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；

S530, within the beginning and ending time, sends wavelength switching 4 officials power message, the wavelength, which switches 4 officials power message, to be used to authorize the ONU only on target downlink wavelength channel corresponding with the target downlink wavelength to the ONU；

S540, when successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the ONU is received on the upstream wavelength passage wavelength handoff completion message that 4 officials power message is sent is switched according to the wavelength, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, the method for the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated by optical line terminal to optical network unit, and in the light In the downstream wavelength switching beginning and ending time that road terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength switching power message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and the portfolio of system can be improved.

Specifically, in S510, OLT sends wavelength handover request message on the downstream wavelength passage of source to ONU, and the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and including target wavelength information and switching time information.

In embodiments of the present invention, the switching time information for example switches including downstream wavelength initial time and deadline；In another example, the switching time information includes initial time and the switching duration that downstream wavelength switches；For another example the switching time information includes switching duration and the deadline that downstream wavelength switches；For another example the switching time information includes the initial time, the switching duration and the deadline, but the present invention is not limited thereto.

In embodiments of the present invention, alternatively, the wavelength handover request message is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.Below in conjunction with Fig. 8 A and Fig. 9 A, above-mentioned wavelength handover request message is described respectively.

Fig. 8 A show the schematic diagram of the regulation control message provided in an embodiment of the present invention based on MPCP agreements, wherein, the wavelength handover request message of the embodiment of the present invention can use the structure of the regulation control message shown in Fig. 8 A.

Specifically, as shown in Figure 8 A, MPCP command codes（Opcode) 0001 presentation medium Access Control（Media Access Control, referred to as " MAC ") function for pause（PAUSE), i.e., the message that command code is 0001 is pause（PAUSE) message；Similarly, the message that command code is 0002 is windowing（GATE) message；The message that command code is 0003 is report（REPORT) message；The message that command code is 0004 is registration request（REGISTER_REQ) message；The message that command code is 0005 is registration（REGISTER) message；The message that command code is 0006 is accreditation verification (REGISTER_ACK) message；The message that command code is 0007 is regulation control provided in an embodiment of the present invention（TUNING_CONTROL) message, the TUNING_CONTROL message can be used for OLT and send the related control instruction of downstream wavelength switching to ONU；The message that command code is 0008 is governing response provided in an embodiment of the present invention（TUNING_RESPONSE) message, the TUNING_RESPONSE message can be used for ONU and switch related response message to OLT feeding back downlinks wavelength. Wherein, the TUNING_CONTROL message can include：Destination address (Destination Address, referred to as " DA ") domain of 6 bytes, the source address of 6 bytes（Source Address, referred to as " SA ") domain, the length of 2 bytes（Length)/type（Type) domain, the command code of 2 bytes（Opcode) domain, timestamp (Timestamp) domain of 4 bytes, the mark of 1 byte（Flags) domain, the target wavelength information of 2 bytes（Target Wavelength Information) domain, at the beginning of 1 byte between（Start Time) domain, the time-out of 1 byte（Timeouts) domain, mandate (Grants) domain of 1 byte, the filling of 32 bytes（Pad) the frame school horse complete sequence of domain and 4 bytes（Frame Check Sequence, referred to as " FCS ") domain.

In embodiments of the present invention, the mark of 1 byte（Flags) domain can for example include four kinds of states, for example, when the Flags is " 00 ", can represent that OLT indicates that registered ONU carries out downstream wavelength switching；In another example, when the Flags is " 01 ", it can represent that OLT indicates to be ready for the ONU revocation downstream wavelength switchings of wavelength switching；For another example when the Flags is " 10 ", can represent that OLT confirms that the ONU downstream wavelengths are switched successfully；For another example when the Flags is " 11 ", can represent that OLT confirms that ONU downstream wavelengths switching is failed, but the present invention is not limited thereto.

That is Fig. 8 A show the wavelength handover request message based on MPCP agreements, and the wavelength handover request message based on OAM agreements shown in Fig. 9 A is described below.

Fig. 9 A show the schematic diagram of the regulation control message provided in an embodiment of the present invention based on OAM agreements, wherein, the wavelength handover request message of the embodiment of the present invention can use the structure of the regulation control message shown in Fig. 9 A.

As shown in Figure 9 A, OAM message can for example include the destination address of 6 bytes（ Destination

Address) domain, the source address of 6 bytes（Source Address) domain, the length of 2 bytes（Length)/type（Type) domain, the subtype of 2 bytes（Subtype) domain, the mark of 1 byte（Flags) domain, the code of 2 bytes（Code) domain, the filling of 2 bytes（Pad) the frame check sequence of domain and 4 bytes is bad¹J (Frame Check Sequence) domain.

In the code of 2 bytes（Code) in domain, code " 00 " can for example represent that the OAM message is information（Information) message；Code " 00 " can for example represent that the OAM message is information (Information) message；Code " 01 " can for example represent that the OAM message notifies (Event Notification) message for event；Code " 02 " can for example represent that the OAM message is variable request (Variable Request) message；Code " 03 " can for example represent that the OAM message is variable response（Variable Response) message；Code " 04 " can for example represent that the OAM message controls for loopback（Loopback Control) message；Code " 05 " can for example represent that the OAM message is Regulation control provided in an embodiment of the present invention（Tuning Control) message；Code " 06 " can for example represent that the OAM message is governing response provided in an embodiment of the present invention（Tuning Response) message；Code " FE " can for example represent that the OAM message is specific tissue（Organization Specific) message.

Wherein, the regulation is controlled（Tuning Control) content of message can for example include at least one of following message information：Flag information, target wavelength information, time started information, time-out information and 4 are authorized information.The mark（Flags) information can for example include four kinds of states, for example, when the Flags is " 00 ", can represent that OLT indicates that registered ONU carries out downstream wavelength switching；In another example, when the Flags is " 01 ", it can represent that OLT indicates to be ready for the ONU revocation downstream wavelength switchings of wavelength switching；For another example when the Flags is " 10 ", can represent that OLT confirms that the ONU downstream wavelengths are switched successfully；For another example when the Flags is " 11 ", can represent that OLT confirms that ONU downstream wavelengths switching is failed, but the present invention is not limited thereto.

Therefore, in embodiments of the present invention, the wavelength handover request message is, for example, that the Flags based on MPCP or OAM agreements is that " 00 " adjusts control（Tuning Control) message.

In embodiments of the present invention, the wavelength handover request message can also include the mark and/or downstream wavelength regulating power information for being used to indicate type of message, wherein, the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed, but the present invention is not limited thereto.

In S520, OLT receives the wavelength switch acknowledgment message of ONU transmissions on a fixed upstream wavelength passage, and the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching.

In embodiments of the present invention, alternatively, the wavelength switch acknowledgment message is that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.Below in conjunction with Fig. 8 B and Fig. 9 B, above-mentioned wavelength switch acknowledgment message is described respectively.

As shown in Figure 8 B, show the schematic diagram of the governing response message provided in an embodiment of the present invention based on MPCP agreements, the wavelength switch acknowledgment message of the embodiment of the present invention can be disappeared using the governing response shown in Fig. 8 B, structure.

Wherein, command code is 0008 governing response（TUNING_RESPONSE) message can for example include：The destination address of 6 bytes（Destination Address) domain, source address (Source Address) domain of 6 bytes, length (Length)/type (Type) domain of 2 bytes, 2 words Command code (Opcode) domain of section, timestamp (Timestamp) domain of 4 bytes, the mark of 1 byte（Flags confirm between at the beginning of) domain, the wavelength information of 2 bytes confirm (Echoed Wavelength Information) domain, 1 byte（Echoed Start Time) domain, the time-out of 1 byte confirm (Echoed Timeouts) domain, the filling of 32 bytes（Pad) the frame check sequence of domain and 4 bytes is bad¹J (Frame Check Sequence) domain.

In embodiments of the present invention, the mark of 1 byte（Flags) domain can for example include four kinds of states, for example, when the Flags is " 00 ", can represent that ONU determines to perform downstream wavelength switching；In another example, when the Flags is " 01 ", it can represent that ONU can not perform downstream wavelength switching；For another example when the Flags is " 10 ", can represent that ONU feeding back downlinks wavelength is switched successfully；For another example when the Flags is " 11 ", can represent that ONU feedbacks do not complete downstream wavelength switching, and source downstream wavelength passage is rolled back to, but the present invention is not limited thereto.

Fig. 9 B show the schematic diagram of the governing response message provided in an embodiment of the present invention based on OAM agreements, wherein, the wavelength switch acknowledgment message of the embodiment of the present invention can use the structure of the governing response message shown in Fig. 9 B.

As shown in Figure 9 B, code is the governing response of " 06 "（Tuning Response) content of message can for example include at least one of following message information：Flag information, target wavelength confirmation, time started confirmation and overtime confirmation.Wherein, the mark（Flags) information can for example include four kinds of states, for example, when the Flags is " 00 ", can represent that ONU determines to perform downstream wavelength switching；In another example, when the Flags is " 01 ", it can represent that ONU can not perform downstream wavelength switching；For another example when the Flags is " 10 ", can represent that ONU feeding back downlinks wavelength switches successfully information；For another example when the Flags is " 11 ", can represent that ONU feeding back downlinks wavelength switches failed information, and source downstream wavelength passage is rolled back to, but the present invention is not limited thereto.

Therefore, in embodiments of the present invention, the wavelength switch acknowledgment message is, for example, the governing response that the Flags based on MPCP or OAM agreements is " 00 "（Tuning Response) message.

In embodiments of the present invention, the wavelength switch acknowledgment message can also include at least one of following message：Mark, downstream wavelength regulating power confirmation and switching time confirmation for indicating type of message, wherein, the downstream wavelength regulating power confirmation includes the confirmation at least one of following message information：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed, but the present invention is not limited thereto.

In S530, within the beginning and ending time, OLT is only in target corresponding with the target downlink wavelength Wavelength is sent to the ONU switch 4 officials power message on downstream wavelength passage.

It should be understood that, in embodiments of the present invention, within the beginning and ending time that the downstream wavelength switches, OLT is only authorized on target downlink wavelength channel, without synchronizing mandate on multiple or all downstream wavelength passages, so as to improve switching efficiency, switching error probability is reduced, and the portfolio of system can be improved.

It should also be understood that in embodiments of the present invention, OLT can periodically send wavelength handover grant message within the beginning and ending time.If within the beginning and ending time, OLT receives the wavelength handoff completion message of ONU transmissions, then illustrates that ONU is switched successfully, thus OLT need not send the wavelength handover grant message to ONU again.

I.e. in embodiments of the present invention, alternatively, only receive within the beginning and ending time and in OLT

Before the wavelength handoff completion message that ONU is sent, OLT sends wavelength handover grant message only on the target downlink wavelength channel to the ONU.

In embodiments of the present invention, the wavelength handover grant message can also be the regulation control based on MPCP or OAM agreements（Tuning Control) message, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In S540, when successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, OLT receives the wavelength handoff completion message of ONU transmissions on the upstream wavelength passage, with indicate the ONU within the beginning and ending time successful switch to the target downlink wavelength.

I.e. within the beginning and ending time, if ONU successful switch is to target downlink wavelength, then ONU can receive the wavelength handover grant message that OLT is for example periodically sent within the beginning and ending time, thus, ONU can send wavelength handoff completion message on the upstream wavelength passage of the fixation according to the wavelength handover grant message to OLT.

In embodiments of the present invention, the wavelength handoff completion message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 10 ", indicate that ONU feeding back downlinks wavelength is switched successfully, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

Therefore, the method of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength switching power message is sent to optical network unit, enable the optical network unit to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided multiple descending Power is synchronized on wavelength channel to optical network unit, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and the portfolio of system can be improved.

In embodiments of the present invention, alternatively, as shown in Figure 10, this method 500 also includes：

S550, on the target downlink wavelength channel, just blunt to send wavelength handover success message to the ONU according to the wavelength handoff completion message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

I.e. in embodiments of the present invention, when OLT receives the wavelength handoff completion message of ONU transmissions, OLT can send wavelength to the ONU and switch successfully message on the target downlink wavelength channel, for indicating that the OLT confirms that the ONU downstream wavelengths are switched successfully.

In embodiments of the present invention, the wavelength, which switches successfully message, to be the regulation control based on MPCP or OAM agreements（Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 10 ", represent that OLT confirms that the ONU downstream wavelengths are switched successfully, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

Above in conjunction with Fig. 7 to Figure 10, the situation that the downstream wavelength of ONU in EPON system is switched successfully is described in detail, failed situation is switched below in conjunction with Figure 11 downstream wavelengths for describing ONU.

As shown in figure 11, alternatively, the method 500 of EPON system medium wavelength switching provided in an embodiment of the present invention also includes：

S560, when being not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, wavelength switching 4 officials power message is sent only on the source downstream wavelength passage to the ONU；

S570, on the upstream wavelength passage, the wavelength switching outstanding message that the ONU is sent according to the wavelength handover grant message is received, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

I.e. in embodiments of the present invention, when OLT is not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, OLT sends wavelength handover grant message only on the downstream wavelength passage of source to the ONU, so that downstream wavelength switches failed ONU can receive information on the downstream wavelength passage of source, thus ONU can be according to the wavelength handover grant message, on the upstream wavelength passage of the fixation wavelength switching outstanding message is sent to OLT, to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

Thus, in embodiments of the present invention, even if the switching of ONU downstream wavelengths is failed, OLT is also only authorized on the downstream wavelength passage of source to ONU, ONU is enabled to roll back to source downstream wavelength passage, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and can improve The portfolio of system.

In embodiments of the present invention, the wavelength handover grant message can also be the regulation control based on MPCP or OAM agreements（Tuning Control) message, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, wavelength switching outstanding message can also be based on MPCP or

Governing response (Tuning Response) message of OAM agreements, wherein, the Flags of the Tuning Response message can be " 11 ", indicate that ONU feeding back downlinks wavelength switches failed information, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, alternatively, as shown in figure 11, this method 500 also includes：S580, on the source downstream wavelength passage, just blunt to switch outstanding message to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms ONU downstream wavelengths switching not successfully.

I.e. in embodiments of the present invention, when the OLT wavelength for receiving ONU transmissions switches outstanding message, OLT can send wavelength to the ONU and switch failed message on the source downstream wavelength passage, for indicating that the OLT confirms that ONU downstream wavelengths switching is failed.

In embodiments of the present invention, the wavelength, which switches failed message, to be the regulation control based on MPCP or OAM agreements（Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 11 ", represent that OLT confirms that ONU downstream wavelengths switching is failed, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

It should be understood that, the embodiment of the present invention is only illustrated by taking the EPON system with multiple downstream wavelength passages and a upstream wavelength passage as an example, but the present invention is not limited thereto, the method for wavelength switching provided in an embodiment of the present invention can also be applied to the EPON system with multiple downstream wavelength passages and multiple upstream wavelength passages.

It will also be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength switching power message is sent to optical network unit, enable the optical network unit to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided multiple descending Power is synchronized on wavelength channel to optical network unit, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and the portfolio of system can be improved.

Above in conjunction with Fig. 7 to Figure 11, the method 500 of EPON system medium wavelength switching according to embodiments of the present invention is described in detail from OLT sides, below in conjunction with Figure 12 to Figure 14, the method 600 of EPON system medium wavelength switching according to embodiments of the present invention is described in detail from ONU sides.

As shown in figure 12, the method 600 of EPON system medium wavelength switching provided in an embodiment of the present invention includes：

S610, the wavelength handover request message that optical line terminal OLT is sent is received on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

S620, on fixed upstream wavelength passage, sends wavelength switch acknowledgment message, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching according to the wavelength handover request message to the OLT；

S630, when successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, receives authorization messages, the wavelength handover grant message is used to authorize the ONU；

S640, on the upstream wavelength passage, wavelength handoff completion message is sent according to the wavelength handover grant message to the OLT, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, the method of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength switching power message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

In embodiments of the present invention, alternatively, this method 600 also includes：

S650, on the target downlink wavelength channel, receives the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully. In embodiments of the present invention, alternatively, this method 600 also includes：

S660, when the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, receives the wavelength handover grant message that the OLT is only sent on the source downstream wavelength passage；

S670, on the upstream wavelength passage, sends wavelength switching outstanding message, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time according to the wavelength handover grant message to the OLT.

In embodiments of the present invention, alternatively, this method 600 also includes：

S680, on the source downstream wavelength passage, receives the OLT and switches the failed message of wavelength switching that outstanding message is sent according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms that ONU downstream wavelengths switching is failed.

In embodiments of the present invention, alternatively, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and the wavelength handoff completion message message are that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.

In embodiments of the present invention, the wavelength handover request message is, for example, the regulation control based on MPCP or OAM agreements（Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 00 ", represent that OLT indicates that registered ONU carries out downstream wavelength switching, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength switch acknowledgment message is, for example, the governing response based on MPCP or OAM agreements（Tuning Response) message, wherein, the Flags of the Tuning Response message can be " 00 ", represent that ONU determines to perform downstream wavelength switching, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength handover grant message can also be the regulation control based on MPCP or OAM agreements（Tuning Control) message, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength handoff completion message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 10 ", indicate that ONU feeding back downlinks wavelength is switched successfully, as shown in Fig. 8 B and 98, for sake of simplicity, will not be repeated here.

The wavelength, which switches successfully message, to be the regulation control based on MPCP or OAM agreements

(Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 10 ", Represent that OLT confirms that the ONU downstream wavelengths are switched successfully, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

Wavelength switching outstanding message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 11 ", indicate that ONU feeding back downlinks wavelength switches failed information, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

The wavelength, which switches failed message, to be regulation control (Tuning Control) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Control message can be " 11 ", represent that OLT confirms that ONU downstream wavelengths switching is failed, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

It should be understood that, the embodiment of the present invention is only illustrated by taking the EPON system with multiple downstream wavelength passages and a upstream wavelength passage as an example, but the present invention is not limited thereto, the method for wavelength switching provided in an embodiment of the present invention can also be applied to the EPON system with multiple downstream wavelength passages and multiple upstream wavelength passages.

It will also be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength switching power message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

Below in conjunction with the flow chart shown in Figure 15, the method that EPON system medium wavelength provided in an embodiment of the present invention switches is described in detail.

As shown in figure 15, in S711, OLT sending port 1 sends wavelength handover request message on the downstream wavelength passage of source to ONU, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes target wavelength information and switching time information.

In S712, it is true that ONU sends wavelength switching on fixed upstream wavelength passage, to OLT Message is recognized, for indicating that the ONU determines to perform downstream wavelength switching.

In S713, OLT sending port 2 sends wavelength switching 4 officials power message to ONU only on target downlink wavelength channel, is authorized with carrying out 4 to the ONU within the beginning and ending time.

Within the beginning and ending time, if ONU successful switch is to the target downlink wavelength, flow proceeds to S731 to S734;If ONU does not have successful switch to the target downlink wavelength, flow proceeds to S751 to S753.

In S731, ONU receives on target downlink wavelength channel the wavelength handover grant message of OLT transmissions within the beginning and ending time.

In S732, ONU sends wavelength handoff completion message on fixed upstream wavelength passage to OLT, for indicate the ONU within the beginning and ending time successful switch to the target downlink wavelength.

In S733, OLT sending port 2 sends wavelength on the target downlink wavelength channel, to ONU and switches successfully message, confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

In S734, ONU successfully completes downstream wavelength switching, with OLT in target downlink Path Setup data communication, thus, OLT can be on target downlink passage to ONU transmission data, and ONU can be on the upstream wavelength passage of the fixation to OLT transmission data.

In S751, OLT is not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, then OLT sending port 1 sends wavelength switching 4 officials power message only on the source downstream wavelength passage after beginning and ending time time-out to the ONU.

In S752, ONU sends wavelength switching outstanding message, for indicating that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time on the upstream wavelength passage of the fixation to OLT.

In S753, OLT sending port 1 is on the source downstream wavelength passage, wavelength, which is sent, to the ONU switches failed message, it will also be understood that for indicating that OLT confirms that ONU downstream wavelengths switching is failed, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.

Therefore, the method of the Ethernet passive optical network system medium wavelength switching of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, wavelength switching power message is sent to optical network unit so that the optical network unit can only on target downlink wavelength channel corresponding with target downlink wavelength Downstream wavelength switching is carried out within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and the portfolio of system can be improved.

Above in conjunction with Fig. 1 to Figure 15, facility registration and the method for wavelength switching in EPON system provided in an embodiment of the present invention is described in detail, below in conjunction with Figure 16 to Figure 23, optical line terminal and optical network unit according to embodiments of the present invention is described in detail.

Figure 16 shows the schematic block diagram of the optical line terminal OLT 10 in EPON system provided in an embodiment of the present invention, the EPON system also includes optical network unit ONU, is communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength.As shown in figure 16, the OLT 10 includes：

Sending module 11, for sending windowing message to the ONU；

Receiving module 12, for receiving the login request message for being used to ask registration that the ONU is sent according to the windowing message that the sending module 11 is sent, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；Wherein, the sending module 11 is additionally operable to：The login request message received according to the receiving module 12, sends registration message, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT, to the ONU;

The receiving module 12 is additionally operable to：Receive the registration confirmation message for being used to confirm to complete registration for the registration message transmission that the ONU is sent according to the sending module 11.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

In embodiments of the present invention, alternatively, the LLID that the sending module 11 is sent includes the information for being used to indicate the registration downstream wavelength.

In embodiments of the present invention, alternatively, the registration message that the sending module 11 is sent also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

In embodiments of the present invention, alternatively, the discovery information field for the login request message that the receiving module 12 is received includes the wavelength information；Or the login request message that the receiving module 12 is received includes wavelength information domain, the wavelength information domain includes the wavelength information. In embodiments of the present invention, alternatively, the wavelength information that the receiving module 12 is received also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

It should be understood that in embodiments of the present invention, the windowing message is, for example, the GATE message based on MPCP；The login request message is, for example, the REGISTER_REQ message based on MPCP；The registration message is, for example, the REGISTER message based on MPCP；The registration confirmation message is, for example, the REGISTER_ACK message based on MPCP, is stated for sake of simplicity, no longer praising herein.

It should be understood that, the OLT that optical line terminal 10 according to embodiments of the present invention may correspond in the embodiment of the present invention, and above and other operation and/or function of the modules in optical line terminal 10 is respectively in order to realize the corresponding flow of methods 100 of the Fig. 2 into Fig. 4, for sake of simplicity, will not be repeated here.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Figure 17 shows the schematic block diagram of the optical network unit ONU 20 in EPON system provided in an embodiment of the present invention, the EPON system also includes optical line terminal OLT, is communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength.As shown in figure 17, the ONU 20 includes：

Receiving module 21, the windowing message for receiving OLT transmissions；

Sending module 22, for the windowing message received according to the receiving module 21, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；

The receiving module 21 is additionally operable to：The registration message that the OLT is sent according to the login request message that the sending module 22 is sent is received, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;

The sending module 22 is additionally operable to：The registration message received according to the receiving module 21 sends the registration confirmation message for confirming to complete to register to the OLT.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal so that should Optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

In embodiments of the present invention, alternatively, the LLID that the receiving module 21 is received includes the information for being used to indicate the registration downstream wavelength.

In embodiments of the present invention, alternatively, the registration message that the receiving module 21 is received also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

In embodiments of the present invention, alternatively, the discovery information field for the login request message that the sending module 22 is sent includes the wavelength information；Or the login request message that the sending module 22 is sent includes wavelength information domain, the wavelength information domain includes the wavelength information.

In embodiments of the present invention, alternatively, the wavelength information that the sending module 22 is sent also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

It should be understood that in embodiments of the present invention, the windowing message is, for example, the GATE message based on MPCP；The login request message is, for example, the REGISTER_REQ message based on MPCP；The registration message is, for example, the REGISTER message based on MPCP；The registration confirmation message is, for example, the REGISTER_ACK message based on MPCP, is stated for sake of simplicity, no longer praising herein.

It should be understood that, the ONU that optical network unit 20 according to embodiments of the present invention may correspond in the embodiment of the present invention, and above and other operation and/or function of the modules in optical network unit 20 is respectively in order to realize the corresponding flow of the method 200 in Fig. 5, for sake of simplicity, will not be repeated here.

Therefore, optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Above in conjunction with Figure 16 and Figure 17, being described in detail in EPON system provided in an embodiment of the present invention is used for the optical line terminal and optical network unit of facility registration, below in conjunction with Figure 18 and Figure 19, being described in detail in EPON systems provided in an embodiment of the present invention is used for optical line terminal and optical network unit that wavelength switches.

Figure 18 shows the schematic block diagram of optical line terminal 30 provided in an embodiment of the present invention.Such as Figure 18 Shown, the OLT 30 includes：Change request message, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

Receiving module 32, for in fixed upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message that the sending module 31 is sent is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；

Wherein, the sending module 31 is additionally operable to：Within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU only on target downlink wavelength channel corresponding with the target downlink wavelength, the wavelength handover grant message is used to authorize the ONU；

The receiving module 32 is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, receive the wavelength handoff completion message that the ONU is sent according to the wavelength handover grant message that the sending module 31 is sent on the upstream wavelength passage, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

In embodiments of the present invention, alternatively, the sending module 31 is additionally operable to：On the target downlink wavelength channel, wavelength is sent to the ONU according to the wavelength handoff completion message and switches successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

In embodiments of the present invention, alternatively, the sending module 31 is additionally operable to：When being not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU only on the source downstream wavelength passage；

The receiving module 32 is additionally operable to：On the upstream wavelength passage, receive the ONU and the wavelength switching outstanding message that 4 officials power message is sent is switched according to the wavelength, wavelength switching outstanding message is used to indicate The ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

In embodiments of the present invention, alternatively, the sending module 31 is additionally operable to：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms ONU downstream wavelengths switching not successfully.

In embodiments of the present invention, alternatively, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and the wavelength handoff completion message message are that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.

In embodiments of the present invention, the wavelength handover request message is, for example, the regulation control based on MPCP or OAM agreements（Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 00 ", represent that OLT indicates that registered ONU carries out downstream wavelength switching, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength switch acknowledgment message is, for example, governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 00 ", represent that ONU determines to perform downstream wavelength switching, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength handover grant message can also be the regulation control based on MPCP or OAM agreements（Tuning Control) message, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength handoff completion message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Timing Response message can be " 10 ", indicate that ONU feeding back downlinks wavelength is switched successfully, as shown in Fig. 8 B and 98, for sake of simplicity, will not be repeated here.

The wavelength, which switches successfully message, to be regulation control (Tuning Control) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Control message can be " 10 ", represent that OLT confirms that the ONU downstream wavelengths are switched successfully, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

Wavelength switching outstanding message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 11 ", indicate that ONU feeding back downlinks wavelength switches failed information, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

The wavelength, which switches failed message, to be the regulation control based on MPCP or OAM agreements (Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 11 ", represent that OLT confirms that ONU downstream wavelengths switching is failed, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

It should be understood that, the OLT that optical line terminal 30 according to embodiments of the present invention may correspond in the embodiment of the present invention, and above and other operation and/or function of the modules in optical line terminal 30 is respectively in order to realize the corresponding flow of methods 500 of the Fig. 7 into Figure 11, for sake of simplicity, will not be repeated here.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

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

Receiving module 41, for receiving the wavelength handover request message that optical line terminal OLT is sent on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

Sending module 42, for in fixed upstream wavelength passage, the wavelength handover request message received according to the receiving module 41 sends wavelength switch acknowledgment message to the OLT, and the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；

Wherein, the receiving module 41 is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength handover grant message that the OLT is only sent on target downlink wavelength channel corresponding with the target downlink wavelength is received, the wavelength handover grant message is used to authorize the ONU；

The sending module 42 is additionally operable to：On the upstream wavelength passage, the wavelength received according to the receiving module 41, which switches 4 officials, to be weighed message and sends wavelength handoff completion message to the OLT, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated by optical line terminal to optical network unit, and in the optical link In the downstream wavelength switching beginning and ending time that terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, switching error probability is reduced, and the portfolio of system can be improved.

In embodiments of the present invention, alternatively, the receiving module 41 is additionally operable to：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

In embodiments of the present invention, alternatively, the receiving module 41 is additionally operable to：When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength switching 4 officials power message that the OLT is only sent on the source downstream wavelength passage is received；

The sending module 42 is additionally operable to：On the upstream wavelength passage, wavelength switching outstanding message is sent to the OLT according to the wavelength handover grant message, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

In embodiments of the present invention, alternatively, the receiving module 41 is additionally operable to：On the source downstream wavelength passage, receive the OLT and the failed message of wavelength switching that outstanding message is sent is switched according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms that ONU downstream wavelengths switching is failed.

In embodiments of the present invention, alternatively, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and the wavelength handoff completion message message are that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.

In embodiments of the present invention, the wavelength handover request message is, for example, the regulation control based on MPCP or OAM agreements（Tuning Control) message, wherein, the Flags of the Tuning Control message can be " 00 ", represent that OLT indicates that registered ONU carries out downstream wavelength switching, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength switch acknowledgment message is, for example, governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 00 ", represent that ONU determines to perform downstream wavelength switching, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

In embodiments of the present invention, the wavelength handover grant message can also be the regulation control based on MPCP or OAM agreements（Tuning Control) message, as shown in Fig. 8 A and 9A, for sake of simplicity, It will not be repeated here.

In embodiments of the present invention, the wavelength handoff completion message can also be governing response (Tuning Response) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Response message can be " 10 ", indicate that ONU feeding back downlinks wavelength is switched successfully, as shown in Fig. 8 B and 98, for sake of simplicity, will not be repeated here.

The wavelength, which switches successfully message, to be regulation control (Tuning Control) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Control message can be " 10 ", represent that OLT confirms that the ONU downstream wavelengths are switched successfully, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

Wavelength switching outstanding message can also be the governing response based on MPCP or OAM agreements

(Tuning Response) message, wherein, the Flags of the Tuning Response message can be " 11 ", indicate that ONU feeding back downlinks wavelength switches failed information, as shown in Fig. 8 B and 9B, for sake of simplicity, will not be repeated here.

The wavelength, which switches failed message, to be regulation control (Tuning Control) message based on MPCP or OAM agreements, wherein, the Flags of the Tuning Control message can be " 11 ", represent that OLT confirms that ONU downstream wavelengths switching is failed, as shown in Fig. 8 A and 9A, for sake of simplicity, will not be repeated here.

It should be understood that, the ONU that optical network unit 40 according to embodiments of the present invention may correspond in the embodiment of the present invention, and above and other operation and/or function of the modules in optical network unit 40 is respectively in order to realize the corresponding flow of methods 600 of the Figure 12 into Figure 14, for sake of simplicity, will not be repeated here.

Therefore, optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

As shown in figure 20, the embodiment of the present invention additionally provides the optical line terminal OLT 60 in a kind of EPON system, the EPON system also includes optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, the optical line terminal 60 includes processor 61, memory 62, bus system 63, receiver 64 and transmitter 65.Wherein, processor 61, Memory 62, receiver 64 are connected with transmitter 65 by bus system 63, the memory 62 is used for store instruction, the processor 61 is used for the instruction for performing the memory 62 storage, to control receiver 64 to receive signal, and controls transmitter 65 to send signal；Wherein, the transmitter 65 is used to send windowing message to the ONU；The receiver 64 is used for：The login request message for being used to ask registration that the ONU is sent according to the windowing message is received, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；Wherein, the transmitter 65 is additionally operable to：Registration message is sent to the ONU according to the login request message, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;The receiver 64 is additionally operable to：Receive the registration confirmation message for being used to confirm to complete registration that the ONU is sent according to the registration message.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

It should be understood that in embodiments of the present invention, the processor 61 can be CPU（Central Processing Unit, referred to as " CPU "), the processor 61 can also be other general processors, digital signal processor（DSP), application specific integrated circuit（ASIC), ready-made programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components etc. FPGA.General processor can be microprocessor or the processor can also be any conventional processor etc..

The memory 62 can include read-only storage and random access memory, and provide instruction and data to processor 61.The a part of of memory 62 can also include nonvolatile RAM.For example, memory 62 can be with the information of storage device type.

The bus system 63 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 63 in figure.

In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 61 or the instruction of software form.The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and perform completion, or perform completion with the hardware in processor and software module combination.Software module can be located in random access memory, flash memory, read-only storage, the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register. The storage medium is located at memory 62, and processor 61 reads the information in memory 62, the step of completing the above method with reference to its hardware.To avoid repeating, it is not detailed herein.

Alternatively, as one embodiment, the LLID includes the information for being used to indicate the registration downstream wavelength.

Alternatively, as one embodiment, the registration message also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

Alternatively, as one embodiment, the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

Alternatively, as one embodiment, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

It should be understood that in embodiments of the present invention, the windowing message is, for example, the GATE message based on MPCP；The login request message is, for example, the REGISTER_REQ message based on MPCP；The registration message is, for example, the REGISTER message based on MPCP；The registration confirmation message is, for example, the REGISTER_ACK message based on MPCP, is stated for sake of simplicity, no longer praising herein.

It should be understood that, the above and other operation and/or function for the modules that optical line terminal 60 according to embodiments of the present invention may correspond in middle-end of the embodiment of the present invention 60 is respectively in order to realize the corresponding flow of methods 100 of the Fig. 2 into Fig. 4, for sake of simplicity, will not be repeated here.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

As shown in figure 21, the embodiment of the present invention additionally provides the optical network unit ONU 70 in a kind of EPON system, the EPON system also includes optical line terminal OLT, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, the optical network unit 70 includes processor 71, memory 72, bus system 73, receiver 74 and transmitter 75.Wherein, processor 71, memory 72, receiver 74 are connected with transmitter 75 by bus system 73, and the memory 72 is used for store instruction, and the processor 71 is used for the instruction for performing the memory 72 storage, to control receiver 74 to connect The collection of letters number, and control transmitter 75 to send signal；Wherein, the receiver 74 is used for the windowing message for receiving OLT transmissions；The transmitter 75 is used for：According to the windowing message, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information receives the registration downstream wavelength that the windowing message is used including the ONU；Wherein, the receiver 74 is additionally operable to：The registration message that the OLT is sent according to the login request message is received, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,;The transmitter 75 is additionally operable to：Registration confirmation message for confirming to complete to register is sent to the OLT according to the registration message.

Therefore, optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, by indicating registration downstream wavelength in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

Alternatively, as one embodiment, the LLID includes the information for being used to indicate the registration downstream wavelength.

Alternatively, as one embodiment, the registration message also includes wavelength confirmation, and the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

Alternatively, as one embodiment, the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

Alternatively, as one embodiment, the wavelength information also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

It should be understood that in embodiments of the present invention, the windowing message is, for example, the GATE message based on MPCP；The login request message is, for example, the REGISTER_REQ message based on MPCP；The registration message is, for example, the REGISTER message based on MPCP；The registration confirmation message is, for example, the REGISTER_ACK message based on MPCP, is stated for sake of simplicity, no longer praising herein.

It should be understood that, the ONU that optical network unit 70 according to embodiments of the present invention may correspond in the embodiment of the present invention, and can correspond to optical network unit 20 provided in an embodiment of the present invention, and above and other operation and/or function of the modules in optical line terminal 70 is respectively in order to realize the corresponding flow of the method 200 in Fig. 5, for sake of simplicity, will not be repeated here.

Therefore, the optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, by Registration downstream wavelength is indicated in the login request message that optical network unit is sent to optical line terminal, so that the optical line terminal can determine the downstream wavelength that the optical network unit is used, so as to which facility registration can be realized in the Ethernet passive optical network system communicated using multiple downstream wavelengths and a upstream wavelength, row data communication thus can be entered between the optical network unit and the optical line terminal.

As shown in figure 22, the embodiment of the present invention additionally provides the optical line terminal in a kind of EPON system

OLT 80, the optical line terminal 80 includes processor 81, memory 82, bus system 83, receiver 84 and transmitter 85.Wherein, processor 81, memory 82, receiver 84 are connected with transmitter 85 by bus system 83, the memory 82 is used for store instruction, the processor 81 is used for the instruction for performing the memory 82 storage, to control receiver 84 to receive signal, and transmitter 85 is controlled to send signal；

Wherein, the transmitter 85 is used for：On the downstream wavelength passage of source wavelength handover request message is sent to optical network unit ONU, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

The receiver 84 is used for：On fixed upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；

Wherein, the transmitter 85 is additionally operable to：Within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU only on target downlink wavelength channel corresponding with the target downlink wavelength, the wavelength handover grant message is used to be authorized ONU progress 4；

The receiver 84 is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength handoff completion message that the ONU is sent according to the wavelength handover grant message is received on the upstream wavelength passage, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved. Alternatively, as one embodiment, the transmitter 85 is additionally operable to：On the target downlink wavelength channel, wavelength is sent to the ONU according to the wavelength handoff completion message and switches successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

Alternatively, as one embodiment, the transmitter 85 is additionally operable to：When being not received by the wavelength handoff completion message of ONU transmissions within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU only on the source downstream wavelength passage；

The receiver 84 is additionally operable to：On the upstream wavelength passage, receive the ONU and the wavelength switching outstanding message that power message is sent is switched according to the wavelength, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

Alternatively, as one embodiment, the transmitter 85 is additionally operable to：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms ONU downstream wavelengths switching not successfully.

Alternatively, as one embodiment, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and the wavelength handoff completion message message are that 0 AM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.

It should be understood that, the OLT that optical line terminal 80 according to embodiments of the present invention may correspond in the embodiment of the present invention, and can correspond to optical line terminal 30 provided in an embodiment of the present invention, and above and other operation and/or function of the modules in optical line terminal 80 is respectively in order to realize the corresponding flow of methods 500 of the Fig. 7 into Figure 11, for sake of simplicity, will not be repeated here.

Therefore, optical line terminal in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

As shown in figure 23, the embodiment of the present invention additionally provides the optical network unit ONU 90 in a kind of EPON system, and the optical network unit 90 includes processor 91, memory 92, bus system 93, receiver 94 and transmitter 95.Wherein, processor 91, memory 92, receiver 94 are connected with transmitter 95 by bus system 93, the memory 92 is used for store instruction, the processor 91 is used for the instruction for performing the memory 92 storage, to control receiver 94 to receive signal, and transmitter 95 is controlled to send out The number of delivering letters；

Wherein, the receiver 94 is used for：The wavelength handover request message that optical line terminal OLT is sent is received on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；The transmitter 95 is used for：On fixed upstream wavelength passage, wavelength switch acknowledgment message is sent to the OLT according to the wavelength handover request message, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform downstream wavelength switching；

Wherein, the receiver 94 is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength handover grant message that the OLT is only sent on target downlink wavelength channel corresponding with the target downlink wavelength is received, the wavelength handover grant message is used to authorize the ONU；

The transmitter 95 is additionally operable to：On the upstream wavelength passage, 4 officials switched according to the wavelength weigh message to the OLT and send wavelength handoff completion message, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

Therefore, optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

Alternatively, as one embodiment, the receiver 94 is additionally operable to：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

Alternatively, as one embodiment, the receiver 94 is additionally operable to：When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength switching 4 officials power message that the OLT is only sent on the source downstream wavelength passage is received；

The transmitter 95 is additionally operable to：On the upstream wavelength passage, 4 officials are switched according to the wavelength and weigh message to OLT transmission wavelength switching outstanding messages, wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time. Alternatively, as one embodiment, the receiver 94 is additionally operable to：On the source downstream wavelength passage, receive the OLT and the failed message of wavelength switching that outstanding message is sent is switched according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms that ONU downstream wavelengths switching is failed.

Alternatively, as one embodiment, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and the wavelength handoff completion message message are that OAM message is safeguarded in Multi-point Control Protocol MPCP message or operation management.

It should be understood that, the ONU that optical network unit 90 according to embodiments of the present invention may correspond in the embodiment of the present invention, and can correspond to optical network unit 40 provided in an embodiment of the present invention, and above and other operation and/or function of the modules in optical network unit 90 is respectively in order to realize the corresponding flow of methods 600 of the Figure 12 into Figure 14, for sake of simplicity, will not be repeated here.

Therefore, optical network unit in the Ethernet passive optical network system of the embodiment of the present invention, target wavelength information and switching time information are indicated to optical network unit by optical line terminal, and within the downstream wavelength switching beginning and ending time that the optical line terminal is indicated, only on target downlink wavelength channel corresponding with target downlink wavelength wavelength handover grant message is sent to optical network unit, the optical network unit is enabled to carry out downstream wavelength switching within the switching beginning and ending time, and optical line terminal can be avoided to synchronize power to optical network unit on multiple downstream wavelength passages, thus, it is possible to simplify downstream wavelength switching flow, reduce switching error probability, and the portfolio of system can be improved.

In addition, the terms " system " and " network " are often used interchangeably herein.The terms " and/or ", a kind of only incidence relation for describing affiliated partner, expression may have three kinds of relations, for example, A and/or can represent：Individualism eight, while in the presence of these three situations of eight and ^ individualisms B.In addition, character "/" herein, typically represent forward-backward correlation object be it is a kind of " or " relation.

It should be understood that in embodiments of the present invention, " B corresponding with A " represents that B is associated with A, and B can be determined according to A.It is also to be understood that determining that B is not meant to determine B only according to A according to A, ^ can also be determined according to A and/or other information

Those of ordinary skill in the art can be appreciated that, the unit and algorithm steps of each example described with reference to the embodiments described herein, it can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate the interchangeability of hardware and software, the composition and step of each example are generally described according to function in the above description.These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can realize described function to each specific application using distinct methods, but this realization is it is not considered that super Go out the scope of the present invention.

It is apparent to those skilled in the art that, for convenience of description and succinctly, the specific work process of the system of foregoing description, device and unit may be referred to the corresponding process in preceding method embodiment, will not be repeated here.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can realize by another way.For example, device embodiment described above is only schematical, for example, the division of the unit, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.Another sunset is foretold, and shown or discussed coupling each other or direct are closed or communication connection can be closed by indirect of some interfaces, device or unit or communication connection or electricity, and mechanical or other forms are connected.It can be for the part that unit is shown or may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Some or all of unit therein can be selected to realize the purpose of scheme of the embodiment of the present invention according to the actual needs.

In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit or unit is individually physically present or two or more units are integrated in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.

If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or in use, can be stored in a computer read/write memory medium.Understood based on such, the part that technical scheme substantially contributes to prior art in other words, or all or part of the technical scheme can be embodied in the form of software product, the computer software product is stored in a storage medium, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（ROM, Read-Only Memory), arbitrary access deposits that 4 all devices (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.

It is described above; only embodiment of the invention; but protection scope of the present invention is not limited thereto; any one skilled in the art the invention discloses technical scope in; various equivalent modifications or substitutions can be readily occurred in, these modifications or substitutions should all cover in protection scope of the present invention Within.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims (35)

1. Claims

   1st, in a kind of Ethernet passive optical network EPON system facility registration method, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, characterized in that, methods described includes：Windowing message is sent to the ONU；

   Receive the login request message for being used to ask registration that the ONU is sent according to the windowing message, the login request message carries the wavelength information of the ONU, and the wavelength information includes the ONU and receives the registration downstream wavelength that the windowing message is used；

   Registration message is sent to the ONU by the registration downstream wavelength, the registration message includes receiving the registration confirmation message for being used to confirm to complete registration that the ONU is sent according to the registration message.

   2nd, the method according to claim 1, it is characterised in that the registration message also includes wavelength confirmation, the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

   3rd, method according to claim 1 or 2, it is characterised in that the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

   4th, according to the method in any one of claims 1 to 3, it is characterised in that the wavelength information also includes the downstream wavelength regulating power information of the ONU, the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

   5th, in a kind of Ethernet passive optical network EPON system facility registration method, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, characterized in that, methods described includes：Receive the windowing message that the OLT is sent；

   According to the windowing message, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information includes the ONU and receives the registration downstream wavelength that the windowing message is used；

   The registration message that the OLT is sent according to the login request message is received by the registration downstream wavelength, it is the logical links mark that the ONU is distributed that the registration message, which includes the OLT, LLID;

   Registration confirmation message for confirming to complete to register is sent to the OLT according to the registration message.6th, method according to claim 5, it is characterised in that the registration message also includes wavelength confirmation, the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

   7th, the method according to claim 5 or 6, it is characterised in that the discovery information field of the login request message includes the wavelength information；Or the login request message includes wavelength information domain, the wavelength information domain includes the wavelength information.

   8th, the method according to any one of claim 5 to 7, it is characterised in that the wavelength information also includes the downstream wavelength regulating power information of the ONU, the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

   9th, a kind of method of Ethernet passive optical network EPON system medium wavelength switching, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, characterized in that, methods described includes：On the downstream wavelength passage of source wavelength handover request message is sent to optical network unit ONU, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

   On the upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform the downstream wavelength switching；Wavelength handover grant message is sent to the ONU, the wavelength handover grant message is used to authorize the ONU；

   When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, receive the wavelength handoff completion message that the ONU is sent according to the wavelength handover grant message on the upstream wavelength passage, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

   10th, method according to claim 9, it is characterised in that methods described also includes：On the target downlink wavelength channel, according to the wavelength handoff completion message to the ONU Send wavelength and switch successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

   11st, method according to claim 9, it is characterised in that methods described also includes：When the wavelength switching completion that the ONU transmissions are not received by within the beginning and ending time disappears on the upstream wavelength passage, the wavelength switching outstanding message that the ONU is sent according to the wavelength handover grant message is received, the wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

   12nd, method according to claim 11, it is characterised in that methods described also includes：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms that the ONU downstream wavelengths switch not successfully.

   13rd, the method according to any one of claim 9 to 12, characterized in that, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and described wavelength handoff completion message message, which are Multi-point Control Protocol MPCP message or operation management, safeguards OAM message.

   14th, a kind of method of Ethernet passive optical network EPON system medium wavelength switching, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, characterized in that, methods described includes：The wavelength handover request message that optical line terminal OLT is sent is received on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

   On the upstream wavelength passage, wavelength switch acknowledgment message is sent to the OLT according to the wavelength handover request message, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform the downstream wavelength switching；

   When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, authorization messages are changed in reception, and the wavelength handover grant message is used to authorize the ONU；

   On the upstream wavelength passage, wavelength handoff completion message is sent to the OLT according to the wavelength handover grant message, the wavelength handoff completion message is used to indicate the ONU in the start-stop Successful switch is to the target downlink wavelength in time.

   15th, method according to claim 14, it is characterised in that methods described also includes：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

   16th, method according to claim 14, it is characterised in that methods described also includes：When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength handover grant message that the OLT is only sent on the source downstream wavelength passage is received；

   On the upstream wavelength passage, wavelength switching outstanding message is sent to the OLT according to the wavelength handover grant message, the wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

   17th, method according to claim 16, it is characterised in that methods described also includes：On the source downstream wavelength passage, receive the OLT and the failed message of wavelength switching that outstanding message is sent is switched according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms the ONU downstream wavelengths switching not successfully.

   18th, the method according to any one of claim 14 to 17, characterized in that, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and described wavelength handoff completion message message, which are Multi-point Control Protocol MPCP message or operation management, safeguards OAM message.

   19th, the optical line terminal OLT in a kind of Ethernet passive optical network EPON system, the EPON systems also include optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, it is characterised in that the OLT includes：

   Sending module, for sending windowing message to the ONU；

   Receiving module, for receiving the login request message for being used to ask registration that the ONU is sent according to the windowing message that the sending module is sent, the login request message carries the wavelength information of the ONU, and the wavelength information includes the ONU and receives the registration downstream wavelength that the windowing message is used；

   Wherein, the sending module is additionally operable to：Registration message is sent to the ONU by the registration downstream wavelength, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,; The receiving module is additionally operable to：Receive the registration confirmation message for being used to confirm to complete registration for the registration message transmission that the ONU is sent according to the sending module.

   20th, optical line terminal according to claim 19, it is characterised in that the registration message that the sending module is sent also includes wavelength confirmation, the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

   21st, the optical line terminal according to claim 19 or 20, it is characterised in that the discovery information field for the login request message that the receiving module is received includes the wavelength information；Or the login request message that the receiving module is received includes wavelength information domain, the wavelength information domain includes the wavelength information.

   22nd, the optical line terminal according to any one of claim 19 to 21, it is characterized in that, the wavelength information that the receiving module is received also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

   23rd, the optical network unit ONU in a kind of Ethernet passive optical network EPON systems, described

   EPON system also includes optical line terminal OLT, is communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, it is characterised in that the ONU includes：

   Receiving module, for receiving the windowing message that the OLT is sent；

   Sending module, for the windowing message received according to the receiving module, the login request message for asking registration is sent to the OLT, the login request message carries the wavelength information of the ONU, and the wavelength information includes the ONU and receives the registration downstream wavelength that the windowing message is used；

   The receiving module is additionally operable to：The registration message that the OLT is sent according to the login request message that the sending module is sent is received, it is the logical links label L LID that the ONU is distributed that the registration message, which includes the OLT,；

   The sending module is additionally operable to：The registration message received according to the receiving module sends the registration confirmation message for confirming to complete to register to the OLT.

   24th, optical network unit according to claim 23, it is characterised in that the registration message that the receiving module is received also includes wavelength confirmation, the wavelength confirmation is used to indicate that the OLT confirms the wavelength information.

   25th, the optical network unit according to claim 23 or 24, it is characterised in that the transmission The discovery information field for the login request message that module is sent includes the wavelength information；Or the login request message that the sending module is sent includes wavelength information domain, the wavelength information domain includes the wavelength information.

   26th, the optical network unit according to any one of claim 23 to 25, it is characterized in that, the wavelength information that the sending module is sent also includes the downstream wavelength regulating power information of the ONU, and the downstream wavelength regulating power information includes at least one of following message：Downstream wavelength control interval, down going wave long number, the wavelength regulation scope of tunable filter, the regulating time of each downstream wavelength control interval and downstream wavelength governing speed.

   27th, the optical line terminal OLT in a kind of Ethernet passive optical network EPON system, the EPON systems include optical line terminal OLT and optical network unit ONU, communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, characterized in that, the OLT includes：Request message, the wavelength handover request message is used to indicate that the ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；

   Receiving module, for in the upstream wavelength passage, the wavelength switch acknowledgment message that the ONU is sent according to the wavelength handover request message that the sending module is sent is received, the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform the downstream wavelength switching；

   Wherein, the sending module is additionally operable to：Within the beginning and ending time, wavelength switching 4 officials power message is sent to the ONU on target downlink wavelength channel corresponding with the target downlink wavelength, the wavelength handover grant message is used to authorize the ONU；

   The receiving module is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, receive the wavelength handoff completion message that the wavelength that the ONU sends according to the sending module switches 4 officials power message and sent on the upstream wavelength passage, the wavelength handoff completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

   28th, optical line terminal according to claim 27, it is characterised in that the sending module is additionally operable to：On the target downlink wavelength channel, wavelength is sent to the ONU according to the wavelength handoff completion message and switches successfully message, the wavelength switches successfully message and confirms that the ONU downstream wavelengths are switched successfully for guidance light road terminal OLT.

   29th, optical line terminal according to claim 27, it is characterised in that the sending module It is additionally operable to：When being not received by the wavelength handoff completion message that the ONU is sent within the beginning and ending time, the wavelength handover grant message is sent to the ONU only on the source downstream wavelength passage；

   The receiving module is additionally operable to：On the upstream wavelength passage, receive the ONU and the wavelength switching outstanding message that 4 officials power message is sent is switched according to the wavelength, the wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

   30th, optical line terminal according to claim 29, it is characterised in that the sending module is additionally operable to：On the source downstream wavelength passage, outstanding message is switched to the failed message of ONU transmission wavelength switchings according to the wavelength, the wavelength, which switches failed message, to be used to indicate that OLT confirms that the ONU downstream wavelengths switch not successfully.

   31st, the optical line terminal according to any one of claim 27 to 30, characterized in that, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and described wavelength handoff completion message message, which are Multi-point Control Protocol MPCP message or operation management, safeguards OAM message.

   32nd, the optical network unit ONU in a kind of Ethernet passive optical network EPON systems, described

   EPON system includes optical line terminal OLT and optical network unit ONU, is communicated between the OLT and the ONU based on multiple downstream wavelengths and a upstream wavelength, it is characterised in that the ONU includes：

   Receiving module, for receiving the wavelength handover request message that optical line terminal OLT is sent on the downstream wavelength passage of source, the wavelength handover request message is used to indicate that optical network unit ONU switches to target downlink wavelength, and the wavelength handoff request message includes the target wavelength information for indicating the target downlink wavelength, and the beginning and ending time switched for indicating downlink wavelength switching time information；Sending module, for in the upstream wavelength passage, the wavelength handover request message received according to the receiving module sends wavelength switch acknowledgment message to the OLT, and the wavelength switch acknowledgment message is used to indicate that the ONU determines to perform the downstream wavelength switching；

   Wherein, the receiving module is additionally operable to：When successful switch is to the target downlink wavelength within the beginning and ending time by the ONU, the wavelength switching 4 officials power message that the OLT is sent on target downlink wavelength channel corresponding with the target downlink wavelength is received, the wavelength, which switches 4 officials power message, to be used to be authorized ONU progress 4；

   The sending module is additionally operable to：On the upstream wavelength passage, the wavelength received according to the receiving module switches 4 officials and weighs message to OLT transmission wavelength handoff completion messages, and the wavelength is cut Change completion message be used to indicating the ONU within the beginning and ending time successful switch to the target downlink wavelength.

   33rd, optical network unit according to claim 32, it is characterised in that the receiving module is additionally operable to：On the target downlink wavelength channel, the wavelength handover success message that the OLT is sent according to the wavelength handoff completion message is received, the wavelength, which switches successfully message, to be used to indicate that the OLT confirms that the ONU downstream wavelengths are switched successfully.

   34th, optical network unit according to claim 32, it is characterised in that the receiving module is additionally operable to：When the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time, after beginning and ending time time-out, the wavelength handover grant message that the OLT is only sent on the source downstream wavelength passage is received；

   The sending module is additionally operable to：On the upstream wavelength passage, wavelength switching outstanding message is sent to the OLT according to the wavelength handover grant message, the wavelength switching outstanding message is used to indicate that the ONU is switched to the target downlink wavelength not successfully within the beginning and ending time.

   35th, optical network unit according to claim 34, it is characterised in that the receiving module is additionally operable to：On the source downstream wavelength passage, receive the OLT and the failed message of wavelength switching that outstanding message is sent is switched according to the wavelength, the wavelength, which switches failed message, to be used to indicate that the OLT confirms the ONU downstream wavelengths switching not successfully.

   36th, the optical network unit according to any one of claim 32 to 35, characterized in that, at least one of the wavelength handover request message, the wavelength switch acknowledgment message, the wavelength handover grant message and described wavelength handoff completion message message, which are Multi-point Control Protocol MPCP message or operation management, safeguards OAM message.