WO2021004235A1 - 激活方法、装置、控制装置、网络设备、光网络系统 - Google Patents

激活方法、装置、控制装置、网络设备、光网络系统 Download PDF

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Publication number
WO2021004235A1
WO2021004235A1 PCT/CN2020/096257 CN2020096257W WO2021004235A1 WO 2021004235 A1 WO2021004235 A1 WO 2021004235A1 CN 2020096257 W CN2020096257 W CN 2020096257W WO 2021004235 A1 WO2021004235 A1 WO 2021004235A1
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Prior art keywords
onu
olt
activation
channel
new system
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PCT/CN2020/096257
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English (en)
French (fr)
Inventor
张伟良
郭勇
魏君珊
袁立权
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ZTE Corp
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ZTE Corp
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Priority to EP20836152.7A priority Critical patent/EP3996383A4/en
Priority to US17/624,783 priority patent/US12120474B2/en
Publication of WO2021004235A1 publication Critical patent/WO2021004235A1/zh
Anticipated expiration legal-status Critical
Priority to US18/828,230 priority patent/US20250039584A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0064—Arbitration, scheduling or medium access control aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • the present disclosure relates to (but is not limited to) the field of communications.
  • a large part of the transmission delay in passive optical network is due to the opening of optical line terminal (OLT) to the OLU to be activated when the optical network unit (ONU) is activated Caused by a quiet window.
  • OLT optical line terminal
  • ONU optical network unit
  • a quiet window During the open quiet window, only the ONU to be activated is allowed to send upstream signals for activation, while other ONUs that have completed activation and are working normally cannot send upstream signals during the quiet window. Therefore, if a normally working ONU has upstream data to be sent during the quiet window, the upstream data sent by it will be delayed.
  • channels dedicated to activation use dedicated activation wavelength (DAW) wavelength resources in existing systems
  • DAW dedicated activation wavelength
  • the signal sent on the DAW needs to be split by an optical splitter, and after splitting After the processor is processed, the signal will be attenuated by about 3dB, which will affect the existing system.
  • the existing system OLT cannot even correctly analyze the signal on the DAW channel.
  • An embodiment of the present disclosure provides an ONU activation method, including: a first OLT activates a new system ONU through a DAW channel and obtains activation information of the new system ONU, the first OLT is an OLT in an existing system; and the first OLT integrates the new system The activation information of the ONU is sent to the second OLT in the new system.
  • the embodiment of the present disclosure also provides an ONU activation method, including: a second OLT obtains activation information of the ONU of the new system to activate the first OLT in the existing system, the second OLT is the OLT in the new system, and the activation information is The new system ONU is generated during the activation process on the first OLT through the DAW channel; and the second OLT activates the new system ONU according to the activation information.
  • the embodiment of the present disclosure also provides an ONU activation method, including: the ONU obtains activation information generated by the ONU of the new system activating on the first OLT in the existing system; and the ONU sends the activation information through a service channel To the second OLT in the new system.
  • the embodiment of the present disclosure also provides an ONU activation method, which includes: the ONU activates on the first OLT in the existing system through the DAW channel, and the ONU is the ONU in the new system.
  • the embodiment of the present disclosure also provides an ONU activation device, which is applied to the first OLT side in an existing system, and includes: a first information acquisition module for activating the ONU of the new system through the DAW channel and acquiring activation information of the ONU of the new system; And the activation information sending module is used to send the activation information of the ONU of the new system to the second OLT in the new system.
  • the embodiment of the present disclosure also provides an ONU activation device, which is applied to the second OLT side in the new system, and includes: a second information acquisition module for acquiring the ONU of the new system to activate on the first OLT in the existing system Activation information, which is generated during the activation process of the new system ONU through the DAW channel to the first OLT; and the ONU activation module, which is used to activate the new system ONU according to the activation information.
  • the embodiment of the present disclosure also provides an ONU control device, which includes: a first activation control module for activation on a second OLT in the new system; an activation information acquisition module for acquiring the ONU of the new system in the existing system Activation information generated by activation on the first OLT; and an activation proxy forwarding module for sending the activation information to the second OLT through the service channel.
  • the embodiment of the present disclosure also provides an ONU control device, including: a second activation control module, used for the ONU to activate on the first OLT in the existing system through the DAW channel, and the ONU is the ONU in the new system.
  • a second activation control module used for the ONU to activate on the first OLT in the existing system through the DAW channel, and the ONU is the ONU in the new system.
  • the embodiments of the present disclosure also provide a network device, which includes a processor, a memory, and a communication bus.
  • the communication bus is used to implement connection and communication between the processor and the memory, and the processor is used to execute the first ONU activation program stored in the memory.
  • the processor is used to execute the second ONU activation program stored in the memory to implement the second ONU activation method; or the processor is used to execute the third ONU activation program stored in the memory .
  • the processor is used to execute the fourth ONU activation program stored in the memory to realize the above-mentioned fourth ONU activation method.
  • the embodiments of the present disclosure also provide a PON system, including an existing system and a new system.
  • the existing system includes a first OLT
  • the new system includes a second OLT and multiple ONUs.
  • the first OLT performs the first The network equipment of the ONU activation program
  • the second OLT is the network equipment of the above-mentioned processor executing the second ONU activation program
  • the part of the multiple ONUs is the network equipment of the above-mentioned processor executing the third ONU activation program
  • the other part of the multiple ONUs Execute the fourth ONU activation program network device for the above-mentioned processor.
  • the embodiment of the present disclosure also provides a storage medium in which at least one of a first ONU activation program, a second ONU activation program, a third ONU activation program, and a fourth ONU activation program is stored.
  • the first ONU activation program is When one or more processors are executed, the one or more processors are allowed to implement the first ONU activation method; when the second ONU activation program is executed by one or more processors, the one or more processes are When the third ONU activation program is executed by one or more processors, the one or more processors realize the above third ONU activation method; the fourth ONU activation program is executed by one Or when multiple processors are executed, the one or more processors are allowed to implement the foregoing fourth ONU activation method.
  • Fig. 1 is a schematic diagram of communication between an OLT and an ONU in a PON system according to an embodiment of the present disclosure
  • Figure 2 is a schematic diagram of a new system ONU activated through a DAW channel according to an embodiment of the present disclosure
  • FIG. 3 is an interactive flowchart of an ONU activation method according to an embodiment of the present disclosure
  • FIG. 4 is another interaction flow chart of the ONU activation method according to an embodiment of the present disclosure.
  • Fig. 5 is a flowchart of an ONU activation method according to an embodiment of the present disclosure
  • Fig. 6 is a flowchart of an ONU activation method according to an embodiment of the present disclosure.
  • Fig. 7 is a flowchart of an ONU activation method according to an embodiment of the present disclosure.
  • FIG. 8 is a flow interaction diagram of an ONU activation method according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of an ONU activation device applied to the first OLT side according to an embodiment of the present disclosure.
  • FIG. 10 is another schematic structural diagram of the ONU activation device applied to the first OLT side according to an embodiment of the present disclosure
  • FIG. 11 is a schematic structural diagram of an ONU activation device applied to a second OLT side according to an embodiment of the present disclosure
  • FIG. 12 is a schematic structural diagram of an ONU control device applied to the ONU side according to an embodiment of the present disclosure
  • FIG. 13 is another structural schematic diagram of an ONU control device applied to the ONU side according to an embodiment of the present disclosure.
  • Fig. 14 is a schematic diagram of the hardware structure of a network device according to an embodiment of the present disclosure.
  • the traditional PON network architecture is shown in Figure 1.
  • the channel between the OLT and the ONU transmits both data and management information. That is, the OLT 11 and the ONU 12 communicate through a channel.
  • PON has gradually become one of the bearer technologies for mobile fronthaul, mobile backhaul, sensor networks, and in-vehicle networks. These network services have very high transmission delay requirements for mobile networks and even PON as a bearer during the application process. strict.
  • Transmission delay in PON includes: optical transmission delay, delay caused by open quiet window and bandwidth allocation delay.
  • the optical transmission delay is related to the fiber distance, and the transmission time of 20Km is about 100us.
  • the open quiet window is used by the OLT to discover and range ONUs, which is an overhead caused by the initialization of the channel connection between the OLT and the ONU.
  • ONUs that are working normally that is, ONUs that have been discovered and ranged by the OLT
  • the OLT needs to periodically open the quiet window. This period is related to the actual application.
  • the period should be at the second level, that is, it must be opened every 1 second The maximum quiet window of 200us.
  • the upstream data sent by the normally working ONU may frequently encounter delays of 200 us.
  • the OLT also needs to open the quiet window when performing distance measurement on the ONU. Therefore, the activation process of the ONU on the OLT will seriously affect the service transmission delay of the activated ONU and reduce the user's communication experience.
  • the related technology proposes a scheme of using DAW resources to specifically activate ONUs, so as to avoid delaying the communication services on the service channel.
  • DAW is a communication resource in an existing system, as shown in Figure 2, when both the existing system and the new system (for example, a low-latency system) exist in the PON system 2, the traditional ONU (Legacy ONU) 221 needs to be The traditional OLT (Legacy OLT) 211 is activated, while the new system ONU 222 needs to be activated on the new system OLT 212.
  • the upstream DAW channel needs to connect both Legacy ONU 221 and Legacy OLT 211, as well as the new system ONU 222 and the new system OLT 212. Therefore, a splitter 23 needs to be set on the DAW channel.
  • the optical splitter 23 may divide the DAW channel into two channels, and send information to the Legacy OLT 211 and the new system ONU 222 respectively.
  • the setting of the optical splitter 23 will cause the attenuation of the signal on the DAW channel, thereby affecting the analysis of the signal on the DAW channel by the Legacy OLT 211 in the existing system.
  • the activation method, device, control device, network equipment, and optical network system provided by the embodiments of the present disclosure are mainly used to solve the need to use an optical splitter when using the wavelength resource in the existing system as the third wavelength in the related technology, resulting in the existing
  • the signal attenuation in the system affects the communication of the existing system.
  • this embodiment provides an ONU activation method, which mainly involves the interaction between the existing system OLT, the new system OLT, and the new system ONU.
  • the existing system OLT is referred to as the "first OLT” in the following text
  • the new system OLT is referred to as the "second OLT”.
  • the interaction flow chart between the second OLT is referred to as the existing system OLT, the new system OLT, and the new system ONU.
  • step S302 the first OLT activates the ONU of the new system through the DAW channel and obtains activation information of the ONU of the new system.
  • the activation process of the ONU on the OLT includes the registration process and the ranging process.
  • the OLT mainly obtains the serial number of the ONU and determines whether the serial number of the ONU exists in the authentication information.
  • the OLT After sending the ranging request, the ONU needs to send a ranging response to the OLT.
  • the OLT calculates the ranging result, saves the ranging result locally or sends the ranging result to the ONU. Therefore, the activation information in this embodiment includes at least one of the new system ONU identification information and the ranging result.
  • the ONU identification information may be the SN (Serial Number) of the ONU.
  • the ONU identification information may also include the media access control (MAC) address of the ONU, activation authentication information, and so on.
  • the activation information obtained by the first OLT from the ONU of the new system includes the ONU identification information and the ranging result.
  • the new system ONU sends ONU identification information to the first OLT, the first OLT passes the authentication of the new system ONU, the new system ONU completes the registration, the first OLT and the new system ONU exchange ranging request and ranging response, and the first OLT calculates the ranging As a result, the ranging result is saved locally or sent to the new system ONU.
  • the ONU of the new system is activated on the first OLT through the DAW channel.
  • the ONU in the existing system can also be activated on the first OLT through the DAW channel. . Because both the ONU in the new system and the ONU in the existing system are activated on the first OLT, there is no need to send part of the information to the first OLT on the DAW channel and the other part of the information to the second OLT. Therefore, on the DAW channel There is no need to set up an optical splitter, and the DAW channel only needs to realize the communication between the ONU and the first OLT. Therefore, the optical splitter in the PON system is successfully removed in this solution.
  • the first OLT can obtain the activation information of the ONU of the new system.
  • step S304 the first OLT sends activation information to the second OLT.
  • the new system ONU needs to establish a connection with the second OLT in the new system
  • the first OLT needs to send the activation information of the new system ONU it has acquired to the second OLT. This allows the second OLT to complete the activation of the ONU of the new system according to the activation information of the ONU of the new system, and realize the initialization of the channel with the ONU of the new system.
  • the first OLT may send activation information to the second OLT by itself.
  • the predefined channel mentioned here includes any of the following: 1) the internal channel of the chip to which the first OLT and the second OLT belong; 2) the internal channel of the line card to which the first OLT and the second OLT belong; 3) The internal channel of the equipment to which the first OLT and the second OLT belong; 4) a direct connection channel, such as a direct connection network cable; 5) a channel established by a third-party system, which may include but is not limited to a network management system.
  • the first OLT needs to send activation information to the second ONU in other ways.
  • the first OLT may send activation information to the second OLT through the new system ONU.
  • the new system ONU for sending activation information to the second OLT is referred to as an "activation proxy ONU".
  • the ONU activation scheme will be described below in conjunction with the interaction flowchart shown in FIG. 4.
  • step S402 the activation agent ONU activates on the first OLT through the DAW channel.
  • the activated proxy ONU is the ONU in the new system. Before the activated proxy ONU is activated on the first OLT, it is already activated on the second OLT.
  • the second OLT initiates the registration process, one or more ONUs in the new system ONU can go to the second OLT for activation, but the second OLT will only One of the system ONUs is activated, and the new system ONU is used as the activation proxy ONU.
  • activating the proxy ONU needs to check the activation information of other new system ONUs activated in the first OLT. Only after the activation proxy ONU is designated, other ONUs in the new system can proceed to the first OLT in the existing system. activation.
  • the second OLT After the second OLT determines the current activation proxy ONU from the ONUs of the new system, it can notify each ONU in the new system through a broadcast message, so that the activation proxy ONU knows that it has been selected as the activation proxy ONU, and also allows other ONU knows that it has not succeeded in competition.
  • the activation agent ONU After the activation agent ONU knows that it is the activation agent ONU, it can activate on the first OLT through the DAW channel. In some examples of this embodiment, the activation proxy ONU is required to activate on the first OLT before other ONUs in the new system. However, in this embodiment, because the activation proxy ONU receives the activation information sent by the first OLT, There is no need to obtain the activation information of other ONUs in the new system by checking or other means. Therefore, the activation agent ONU can go to the first OLT to activate together with other ONUs in the new system, and even other ONUs in the new system can already be Reactivate after activation on the first OLT.
  • step S404 the activation agent ONU receives the activation information sent by the first OLT.
  • the first OLT When each ONU in the new system is activated on the first OLT, the first OLT will obtain activation information generated during the activation process. After obtaining the activation information, the first OLT may send the activation information to the activation agent ONU. Since the activation agent ONU is connected to the first OLT through the DAW channel, the first OLT can send the activation information of the new system ONU to the activation agent ONU through the DAW channel. It is understandable that the first OLT may send activation information of all ONUs activated on it in the new system to the activation proxy ONU, which includes the activation information when the activation proxy ONU is activated on the first OLT.
  • step S406 the activation agent ONU sends the activation information sent by the first OLT to the second OLT through the service channel.
  • the activation agent ONU After the activation agent ONU receives the activation information sent by the first OLT, it sends the activation information to the second OLT. Since there is no DAW channel between the new system ONU and the second OLT in this embodiment, the activation agent ONU can pass through The service channel sends the activation information obtained from the first OLT to the second OLT.
  • the second OLT allocates ONU-ID to the corresponding ONU identification information (for example, ONU SN), and according to the results of ranging from the activation agent ONU on DAW channels and service channels Calculate the ranging result on the DAW channel to obtain the ranging result on the service channel.
  • ONU identification information for example, ONU SN
  • the second OLT no matter how the second OLT obtains the activation information of the new system ONUs on the first OLT, in order to directly activate the new system ONUs at the local end according to the activation information of the new system ONUs on the first OLT ,
  • the second OLT will determine an activation proxy ONU.
  • the activated proxy ONU will first be activated by the second OLT. Therefore, the second OLT can obtain the activation information of the activated proxy ONU on the OLT (ie, the second OLT); then, the activated proxy ONU will go to the first OLT again.
  • the second OLT can also obtain the activation information of the activation agent ONU on the first OLT through the forwarding of the activation agent ONU or the predefined channel between itself and the first OLT.
  • first activation information the activation information of the ONU on the first OLT
  • second activation information the activation information of the ONU on the second OLT
  • the second OLT can determine the difference between the first activation information and the second activation information, that is, the activation agent ONU and the first OLT and the second OLT The distance difference. Since the difference between the activation information activated by any new system ONU on the first OLT and the activation information activated on the second OLT is the same, the difference determined by the second OLT can indicate that any new system ONU is on the second OLT. The difference between the activation information activated on the OLT and the activation information activated on the first OLT.
  • the second OLT obtains the activation information of other inactive proxy ONUs on the first OLT (that is, the first activation information of the inactive proxy ONU), it can determine that these inactive proxy ONUs are in the first OLT based on the above differences. 2.
  • Activation information on the OLT that is, the second activation information of the inactive ONU
  • the activation proxy ONU can be replaced.
  • the original activation proxy ONU is not suitable to continue to be the activation proxy ONU, and the ONU can initiate a replacement request to the second OLT.
  • Let the second OLT re-determine a new activation proxy ONU.
  • the second OLT considers that the current activation proxy ONU is not suitable for continuing to be the activation proxy ONU, the second activation proxy may also actively initiate the replacement process.
  • the second OLT may have activated multiple new system ONUs. Therefore, when the activation proxy ONU needs to be replaced, the second OLT can directly select one of the activated new system ONUs and compare it with The selected ONU is confirmed, and after the confirmation is completed, the change of the activation proxy ONU is completed.
  • the second OLT can use one of the new system ONUs that have completed activation as New activation proxy ONU; if there are no other ONUs that have been activated on the second OLT, the second OLT restarts the activation process to designate an activation proxy ONU.
  • the ONUs that have not yet been activated on the second OLT need to be reactivated, including those new system ONUs that have not yet been activated on the first OLT and those that have already been activated on the first OLT.
  • a new system ONU that has not been activated on the second OLT is worth noting that after completing the replacement of the activation agent ONU, the ONUs that have not yet been activated on the second OLT need to be reactivated, including those new system ONUs that have not yet been activated on the first OLT and those that have already been activated on the first OLT.
  • a new system ONU that has not been activated on the second OLT need to be reactivated, including those new system ONUs that have not yet been activated on the first OLT and those that have already been activated on the first OLT.
  • the new system ONU not only does it not need to occupy the service channel to activate on the second OLT in the new system, but also because the new system ONU uses the DAW channel to send activation information,
  • the activation information is sent to the first OLT in the existing system, without the need to use the DAW channel to send information to the second OLT. Therefore, there is no need to set an optical splitter on the DAW channel to avoid the impact on the communication performance of the existing system.
  • the activation information for the ONU of the new system to activate on the first OLT is sent by the first OLT to the second OLT.
  • the first OLT can directly send the activation information to the second OLT by itself, or through the activation agent
  • the ONU sends the activation information to the second OLT.
  • This embodiment provides another ONU activation method. In this ONU activation solution, the first OLT does not need to send activation information to the second OLT or the activation proxy ONU. Please refer to the flowchart of the ONU activation method shown in FIG. 5.
  • step S502 the ONU is activated on the second OLT in the new system.
  • the ONU in the new system can go to the second OLT for activation. If the ONU is the first ONU to be activated on the second OLT in the new system, the ONU will be directly activated by the second OLT and selected as the activation proxy ONU. If there are other ONUs to activate on the second OLT together with the ONU at the same time, the second OLT will let these ONUs compete, then select one of them for activation and use the selected ONU as the activation proxy ONU. After the activation agent ONU is selected, the second OLT can send information related to the activation agent.
  • the second OLT may only send the information that the activated proxy ONU has been determined, or the second OLT notifies other inactive ONUs to start the activation process, so that the inactive ONU starts to activate with the first OLT through the DAW channel, and further Activate with the second OLT.
  • the DAW channel is not supported between the ONU of the new system and the second OLT. Therefore, the activation of the proxy ONU is through the service channel (For example, a low-latency channel) is activated on the second OLT.
  • the service channel For example, a low-latency channel
  • those new system ONUs that are not successfully selected as the activation proxy ONUs they cannot be directly activated on the second OLT.
  • the activation proxy ONU can check the activation process of other new system ONUs on the first OLT on the first OLT. Since the activation proxy ONU needs to obtain the activation information of other new system ONUs for activation on the first OLT, in this embodiment, the activation proxy ONU generally activates on the first OLT before other ONUs in the new system. Of course, if the activation proxy ONU is not activated on the first OLT, it can also check the activation process of other ONUs on the first OLT.
  • the activation agent ONU When the activation agent ONU is activated on the first OLT, it can be realized through the DAW channel.
  • the activation agent ONU sends its own ONU identification information and ranging response to the first OLT through the DAW channel, and the activation agent ONU is calculated by the first OLT.
  • the ranging result on the DAW is sent to the activation agent ONU.
  • the ONU identification information may be the SN of the ONU, or may also be the MAC address of the ONU or activation authentication information.
  • step S504 the ONU obtains activation information generated by the new system ONU's activation on the first OLT.
  • the activated proxy ONU in the process of activating on the first OLT, you can obtain the information activated on the first OLT; for those inactive proxy ONUs, that is, for those broadcast messages sent by the second OLT, determine the current The activated proxy ONU is not its own new system ONU. After the activation of the activated proxy ONU on the second OLT is completed, these new system ONUs will also be activated on the first OLT through the DAW. During the activation process of these inactive proxy ONUs on the first OLT, the activated proxy ONU can check these activation processes to obtain activation information of the inactive proxy ONU.
  • step S506 the ONU sends the activation information of the ONU of the new system to the second OLT.
  • the activation agent ONU After the activation agent ONU obtains the activation information generated by the activation of the new system ONU on the first OLT, it can send the obtained activation information to the second OLT. Because of the parallel connection between the new system ONU and the second OLT in this embodiment There is no DAW channel, therefore, the activation agent ONU sends the activation information it has obtained from the first OLT to the second OLT through the service channel.
  • the second OLT allocates ONU-ID to the corresponding ONU identification information according to the activation information obtained from the first OLT in the existing system, calculates the ranging result on the DAW channel, and applies the calculated ranging result To the business channel.
  • the second OLT will obtain the activation information of the proxy ONU on the OLT. Subsequently, the proxy ONU will activate again on the first OLT. Therefore, the second OLT
  • the activation information of the activation agent ONU on the first OLT can also be obtained.
  • the activation information of the ONU on the first OLT is referred to as "first activation information”
  • the activation information of the ONU on the second OLT is referred to as "second activation information”.
  • the second OLT can determine the difference between the first activation information and the second activation information, that is, the activation agent ONU and the first OLT and the second OLT The distance difference. Since the difference between the activation information activated by any new system ONU on the first OLT and the activation information activated on the second OLT is the same, the difference determined by the second OLT can indicate that any new system ONU is on the second OLT. The difference between the activation information activated on the OLT and the activation information activated on the first OLT.
  • the second OLT obtains the activation information of other inactive proxy ONUs on the first OLT (that is, the first activation information of the inactive proxy ONU), it can determine that these inactive proxy ONUs are in the first OLT based on the above differences. 2.
  • Activation information on the OLT that is, the second activation information of the inactive ONU
  • the second OLT in the new system can activate the proxy ONU by selecting the proxy ONU, so that the proxy ONU is first activated by the second OLT, and then activated by the first OLT in the existing system.
  • the ONU can check the activation process of these ONUs when other ONUs in the new system are activated on the first OLT, and then obtain the activation information of other ONUs in the new system, and feed the activation information back to the new system, so that the The second OLT can obtain the activation information of the ONU of the new system on the basis of infrequently opening a quiet window to the ONU of the new system, thereby completing the activation of the ONU of the new system, and reducing the impact on service transmission on the service channel as much as possible.
  • the DAW channel only needs to transmit to the first OLT
  • the activation information of the ONU is sufficient, and there is no need to undertake the transmission task from the ONU to the second OLT. This avoids the practice of setting up an optical splitter on the DAW channel, which is beneficial to ensure the communication performance of the existing system.
  • the new system ONU (except for the activation process of the activation agent ONU on the second OLT) all use DAW as the wavelength resource dedicated to the activation process.
  • DAW is the wavelength resource of the existing system.
  • the existing system is gradually replaced by the new system. Only the new system is left in the PON system. In this case, the new system ONU cannot use the existing system.
  • the DAW resources in the system are activated.
  • the ONU activation method is described below in conjunction with the flowchart shown in FIG. 6. In this embodiment, it is assumed that the ONU identification information is the SN of the ONU.
  • step S602 the OLT opens a quiet window on the upstream third wavelength channel, and broadcasts an SN request on the low-latency downstream channel.
  • the OLT here refers to the OLT of a new system, such as a low-latency OLT; similarly, all ONUs in this embodiment are also new System ONU, such as low latency ONU.
  • the third wavelength channel is neither a low-latency service channel nor a DAW channel.
  • the OLT When the OLT needs to discover the ONU, it can open a quiet window on the third wavelength channel, so that the unregistered ONU can send an SN response upstream on the third wavelength channel, thereby realizing registration. While opening the quiet window on the third wavelength channel, the OLT can notify the ONU that registration is currently available. In some examples of this embodiment, the OLT may notify the ONU by broadcasting. Optionally, the OLT broadcasts the SN request on the low-latency downstream channel.
  • step S604 the ONU sends an SN response on the upstream third wavelength channel.
  • the ONU After the ONU is powered on, it works on the wavelength corresponding to the low-latency downstream channel and the third wavelength. Therefore, the ONU can receive it after the OLT sends the SN request on the low-latency downstream channel. After receiving the SN request, the ONU sends an SN response to the OLT through the third wavelength channel.
  • the SN response can include the SN serial number of the ONU.
  • the OLT After the OLT receives the SN sent by the ONU, it can authenticate the SN of the ONU. Two authentication methods are provided below. It should be recognized that these two authentication methods are also applicable to the authentication process in the first and second embodiments. .
  • the authentication information can be configured in the OLT. Therefore, after the OLT receives the SN sent by the ONU, it can use the stored authentication information to authenticate the SN.
  • the authentication information includes SN and registration ID (registration ID).
  • the authentication information can be configured in the authentication server. Therefore, after the OLT receives the SN sent by the ONU, it needs to send the SN to the authentication server, and the authentication server will authenticate the SN according to the stored authentication information. , And return the authentication result to the OLT. The OLT determines whether to allow the registration of the corresponding ONU according to the authentication result of the authentication server.
  • step S606 the OLT continues to open a quiet window on the upstream third wavelength channel, and sends a ranging request on the low-latency downstream channel.
  • the OLT After the OLT accepts the registration of the ONU, it can continue to keep the quiet window open. On the other hand, it sends a ranging request to the ONU through the low-latency downlink channel, so that the ONU can realize ranging according to the ranging request.
  • step S608 the ONU sends a ranging response on the third wavelength channel.
  • the ONU After receiving the ranging request through the low-latency downlink channel, the ONU sends its own ranging response to the OLT through the third wavelength channel, so that the OLT can obtain the ranging result for the ONU according to the ranging response.
  • the OLT After receiving the ranging response, the OLT calculates the first ranging result of the low-latency downlink channel and the third wavelength channel, and further calculates the low-latency downlink channel sum according to the relationship between the third wavelength channel (uplink) and the low-latency uplink channel
  • the second ranging result on the low-latency uplink channel, and then the second ranging result is sent to the ONU.
  • the ONU After the ONU receives the second ranging result, it can apply the ranging result locally, enter the working state, and communicate with the OLT on the low-latency uplink and downlink channels.
  • the ONU can process the upstream third wavelength channel in the following ways.
  • the ONU controls to close the third wavelength channel.
  • the wavelength of the third wavelength channel does not coexist with the wavelength of the upstream service channel, in order to ensure that the upstream service of the ONU can be normally transmitted on the upstream service channel, the ONU must control to close the third wavelength channel.
  • the ONU can process the third wavelength channel in any of the following ways: 1) Use the third wavelength channel as a supplementary channel for the service channel, Expand the capacity of the upstream service channel; 2) Use the third wavelength channel as the backup channel of the service channel, so that when the upstream service channel fails, the upstream service of the ONU can be transmitted from the third wavelength channel, improving the disaster tolerance performance of the PON; 3) Control the third wavelength channel to enter the energy-saving state to reduce the power consumption of the ONU; 4) Control to close the third wavelength channel.
  • the ONU activation method provided in this embodiment is mainly applied to the scenario where the existing system in the PON system has completely transitioned to the new system.
  • all ONUs can register and register on the OLT through the upstream third wavelength channel. Ranging to achieve activation.
  • the upstream third wavelength channel is a channel other than the low-latency service channel, the open quiet window on the third wavelength channel will not affect the service transmission of the activated ONU, compared to the low-latency service channel The practice of opening a quiet window improves the communication performance of the PON system.
  • the existing system clearly exists, so the ONU can be activated on the second OLT through the activation process in the first OLT; in the third embodiment, the existing system clearly does not exist, so All ONUs are unquestionably activated on the OLT of the new system. In other words, whether there is an existing system at present will affect which scheme the ONU adopts for activation. If there is an existing system and the ONU selects the scheme of the third embodiment for activation, or there is no existing system at present, but If the ONU still adopts the solution of the first embodiment or the second embodiment for activation, it is all inappropriate, and the ONU cannot be activated normally. In order to ensure that the ONU can always be normally activated during the transition of the PON system from the existing system to the new system, this embodiment provides a mechanism, please refer to the flowchart shown in FIG. 7.
  • step S702 the second OLT determines whether there is an existing system in the current PON.
  • the second OLT can determine whether there is a predefined channel between itself and the first OLT, or whether the ONU has received the information sent by the first OLT. There are predefined channels between OLTs, and/or the ONU has received the information sent by the first OLT, it means that the first OLT currently exists in the PON system, that is, there is an existing system.
  • step S704 the second OLT executes an activation process based on the first OLT to the second OLT.
  • the second OLT can allow the new system ONU to activate on the first OLT, and can obtain the activation information of the new system ONU through the first OLT, or through The activation agent ONU obtains the activation information of the new system ONU.
  • the specific implementation process please refer to the introduction of the foregoing Embodiment 1 and Embodiment 2, which will not be repeated here.
  • step S706 the second OLT implements the activation process for the ONU of the new system through the third wavelength channel.
  • the second OLT determines that there is no existing system in the current PON system, the ONU cannot be activated on the first OLT, and it is impossible to obtain the activation information of the ONU based on the activation process of the ONU on the first OLT.
  • the second OLT can allow the ONU to directly go to the second OLT for activation through the third wavelength channel other than the DAW and the service channel (low delay channel).
  • the third wavelength channel other than the DAW and the service channel (low delay channel).
  • the ONU activation method provided in this embodiment is suitable for the scenario of a PON system gradually transitioning from an existing system to a new system.
  • the second OLT can flexibly determine the activation scheme used according to whether there is an existing system, so that the ONU can Activate activation at the cost of less time delay and less system performance.
  • the first OLT is an existing system OLT
  • the second OLT is a low-latency OLT
  • the new system ONU is a low-latency ONU.
  • Low-latency ONU supports both DAW channels and low-latency channels.
  • Low-latency channels are used to communicate between low-latency ONUs and low-latency OLTs, and include low-latency upstream channels and low-latency downstream channels.
  • DAW is only used for communication between low-latency ONU and existing system OLT.
  • the low-latency OLT checks whether there is an active proxy ONU currently. If not, it initiates a registration process on the low-latency channel until a low-latency ONU completes the registration and designates this ONU as the active proxy ONU.
  • the low-latency OLT broadcasts information to activate the proxy ONU in the downstream direction.
  • the ONU participates in activation and competes to activate the proxy ONU. Only after the activation of the proxy ONU is determined, all ONUs can be activated to the existing system OLT. After the activation proxy ONU is designated, it can be activated with the existing system OLT. After learning that the activation proxy ONU is designated, other ONUs can check the low-latency OLT's activation proxy ONU information in the downstream direction. If the low-latency OLT has not designated the activation proxy ONU, all ONUs cannot be activated with the existing system OLT. If the low-latency OLT has designated the activation proxy ONU, it can be activated with the existing system OLT.
  • the activation agent ONU checks the activation process and records the activation information during the activation process.
  • the activation information includes, but is not limited to, information such as ONU identification (such as SN) and ranging results. If other ONUs complete activation, the activation agent ONU will report the activation information to the low latency OLT.
  • the low-latency OLT allocates ONU-IDs to the corresponding SNs according to the activation information reported by the activation agent, calculates the distance measurement results on the DAW (for the specific calculation process, please refer to Embodiment 1 and Embodiment 2), and calculates the measured value.
  • the distance result is applied to the low-latency channel.
  • FIG. 8 Please refer to the flow chart of the ONU activation method shown in FIG. 8. Assume that there are 3 new system ONUs in the PON system, namely ONU1, ONU2, and ONU3. These 3 ONUs have communication channels with the low-latency OLT and the existing system OLT. These 3 ONUs communicate with each other through the low-latency channel. Low-latency OLT communicates and communicates with existing systems through DAW channels. In FIG. 8, the thick lines represent communication in a low-latency system (ie, a new system), and thin lines represent communication in an existing system.
  • step S801 the low-latency OLT broadcasts an SN request (Broadcast SN-request) to each ONU.
  • step S802 ONU2 replies SN response (SN-response) to the low-latency OLT.
  • step S803 the low-latency OLT assigns ONU-ID (Assign ONU-ID) to ONU2.
  • step S804 the low-latency OLT sends a ranging request (Ranging request) to ONU2.
  • step S805 ONU2 replies a ranging response (Ranging response) to the low-latency OLT.
  • step S806 the low-latency OLT sends a ranging result (Ranging result) to ONU2.
  • step S807 the low-latency OLT sends agent assignment information (Agent assignment) to ONU2.
  • step S808 the low-latency OLT periodically broadcasts DAW activation permission (Periodically Broadcast DAW activation permission) to each ONU.
  • DAW activation permission Periodically Broadcast DAW activation permission
  • step S809 the existing system OLT broadcasts an SN request (Broadcast SN-request).
  • step S810 ONU3 replies SN response (SN-response) to the existing system OLT.
  • ONU3 receives the broadcast SN request of the existing system OLT and decides to activate it on the existing system sub-OLT according to the broadcast.
  • step S811 the existing system OLT assigns ONU-ID (Assign ONU-ID) to ONU3, and ONU2 obtains the ONU-ID (Get assigned ONU-ID) assigned to ONU3 by the existing system OLT through inspection.
  • ONU-ID Assign ONU-ID
  • ONU2 obtains the ONU-ID (Get assigned ONU-ID) assigned to ONU3 by the existing system OLT through inspection.
  • step S812 the existing system OLT sends a ranging request (Ranging request) to the ONU3.
  • step S813 the ONU3 replies a ranging response (Ranging response) to the existing system OLT.
  • step S814 the existing system OLT sends a ranging result (Ranging result) to ONU3, and at the same time, ONU2 obtains the ranging result (Get ranging result) sent by the existing system OLT to ONU3 through inspection.
  • step S815 ONU2 sends the acquired activation information of ONU3 to the low-latency OLT through the low-latency channel.
  • step S816 the low-latency OLT assigns ONU-ID (Assign ONU-ID) to ONU3.
  • step S817 the low-delay OLT sends a ranging result (Ranging result) to ONU3.
  • the activated proxy ONU can be replaced. Under normal circumstances, the activated proxy ONU sends a replacement request to the low-latency OLT. After the low-latency OLT confirms with another ONU that has completed activation, the change of the activated proxy ONU is completed. If the activation proxy ONU goes offline before the low-latency OLT normally completes the change, the low-latency OLT will use one of the activated ONUs as the new activation proxy ONU (when there is an activated ONU), or restart the activation process to specify an activation proxy ONU (When there is no ONU that has completed activation). After the activation of the proxy ONU is replaced, the ONU that has not been activated needs to be reactivated, and the activation of the existing system OLT must be reactivated.
  • the ONU can be authenticated according to existing system methods, including authentication of SN and registration ID. If the authentication information is configured in the existing system OLT, the authentication process is completed by the existing system OLT. If the authentication information is configured in the authentication server, the existing system OLT authenticates the low-latency ONU through the authentication server.
  • the low-latency OLT judges whether there is an active proxy ONU currently. If not, it initiates a registration process on the low-latency channel until a low-latency ONU completes the registration, and this ONU is designated as the active proxy ONU.
  • All ONUs are activated on the DAW after being powered on, that is, they are activated with the existing system OLT.
  • the existing system OLT sends the activation information of all ONUs to the activation agent ONU, and the activation agent ONU forwards the activation information to the low-latency OLT.
  • the activation information includes but is not limited to: SN and ranging results.
  • the low-latency OLT can also send a confirmation of receipt of activation information to the existing system OLT through the activation proxy ONU.
  • the low-latency OLT allocates ONU-IDs to the corresponding SNs according to the obtained activation information, calculates the ranging results on the DAW (see Embodiment 1 and Embodiment 2 for the specific calculation process), and applies the calculated ranging results To the low latency channel.
  • the activated proxy ONU can be replaced. Under normal circumstances, the activated proxy ONU sends a replacement request to the low-latency OLT. After the low-latency OLT confirms with another ONU that has completed activation, the change of the activated proxy ONU is completed. If the activation proxy ONU goes offline before the low-latency OLT normally completes the change, the low-latency OLT will use one of the activated ONUs as the new activation proxy ONU (when there is an activated ONU), or restart the activation process to specify an activation proxy ONU (When there is no ONU that has completed activation). After the activation of the proxy ONU is replaced, the ONU that has not been activated needs to be reactivated, and the activation of the existing system OLT must be reactivated.
  • the ONU can be authenticated according to existing system methods, including authentication of SN and registration ID. If the authentication information is configured in the existing system OLT, the authentication process is completed by the existing system OLT. If the authentication information is configured in the authentication server, the existing system OLT authenticates the low-latency ONU through the authentication server.
  • This predefined channel can be the internal channel of the same chip, the internal channel on the same line card, or the internal channel of the same device.
  • All ONUs are activated on the DAW after being powered on, that is, they are activated with the existing system OLT.
  • the existing system OLT synchronizes the activation information of all ONUs to the low-latency OLT through a predefined channel.
  • the activation information includes but is not limited to: SN and ranging results.
  • the low-latency OLT allocates an ONU-ID to the corresponding SN according to the activation information obtained from the existing system OLT, calculates the ranging result on the DAW, and applies the calculated ranging result to the low-latency channel.
  • the ONU can be authenticated according to existing system methods, including authentication of SN and registration ID. If the authentication information is configured in the existing system OLT, the authentication process is completed by the existing system OLT. If the authentication information is configured in the authentication server, the existing system OLT authenticates the low-latency ONU through the authentication server.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the ONU activation device 90 includes a first information acquiring module 902 and an activation information sending module 904 .
  • the first information acquisition module 902 is used for activating the ONU of the new system through the DAW channel and acquiring activation information of the ONU of the new system.
  • the activation information sending module 904 is configured to send the activation information of the ONU of the new system to the second OLT in the new system.
  • the above activation information includes but is not limited to at least one of ONU identification information and ranging results.
  • the activation information sending module 904 can send the activation information of the ONU of the new system to the activation proxy ONU, which is the ONU that has been activated on the second OLT in the new system; or the activation information sending module 904 can also activate the ONU of the new system The information is sent to the second OLT through the predefined channel between itself and the second OLT.
  • the above-mentioned predefined channel can be any of the following: 1) the internal channel of the chip to which the first OLT and the second OLT belong; 2) the internal channel of the line card to which the first OLT and the second OLT belong; 3) the first The internal channel of the device to which the OLT and the second OLT belong; 4) a direct connection channel, such as a direct connection channel; 5) a channel established by a third-party system, which may include but is not limited to a network management system.
  • the ONU activation device 100 includes a first information acquisition module 1002, which is used to access the DAW The channel obtains the activation information of the ONU of the new system.
  • the ONU activation device 100 shown in FIG. 10 does not need to pay attention to how the second OLT obtains the activation information of the ONU to activate on the first OLT, and only needs to activate the ONU.
  • Figures 9 and 10 show two applications and the ONU activation device on the first OLT side.
  • the ONU activation device 90 and the ONU activation device 100 can be deployed on the first OLT.
  • the first information acquisition modules 902 and 1002 and activation information The functions of the sending module 904 can be implemented jointly by the processor and the communication unit of the network device where the first OLT is located.
  • this embodiment also provides an ONU activation device applied to the second OLT side.
  • the second OLT is the OLT in the new system. Please refer to FIG. 11.
  • the ONU activation device 110 includes a second information acquisition module 1102 and an ONU activation module 1104.
  • the second information acquisition module 1102 is used to acquire the activation information of the ONU of the new system to activate on the first OLT in the existing system, and the activation information is the process in which the ONU of the new system is activated on the first OLT in the existing system through the DAW channel Produced in.
  • the ONU activation module 1104 is configured to activate the ONU of the new system according to the activation information obtained by the second information obtaining module 1102.
  • the second information acquisition module 1102 can receive the activation information sent by the first OLT through a predefined channel.
  • a predefined channel For the predefined channel mentioned here, refer to the foregoing introduction.
  • the second information obtaining module 1102 may receive activation information sent by the activation agent ONU through the service channel.
  • the activation information sent by the activation agent ONU to the second OLT is obtained by the activation agent ONU by checking the activation process of the new system ONU on the first OLT, or the activation agent ONU receives from the first OLT To.
  • the ONU activation device 110 may first activate a new system ONU, and determine the new system ONU as the current ONU Activating the proxy ONU; then the ONU activation device 110 notifies each ONU in the new system of the current activating proxy ONU through the service channel.
  • the ONU activation device 110 Before the ONU activation device 110 determines the new system ONU as the current activation proxy ONU, it may first determine whether the first OLT exists in the PON system.
  • the ONU activation device 110 determines that the first OLT does not exist in the PON system, the ONU activation device 110 activates the ONU in the new system through the third wavelength channel, and the third wavelength channel is the service channel Channels other than DAW channels.
  • the ONU activation module 1104 when the ONU activation module 1104 activates the new system ONU, it can first determine whether the activation information of the activation agent ONU on the second OLT is between the activation information of the activation agent ONU on the first OLT. Then, the ONU activation module 1104 determines the activation information of the inactive agent ONU on the second OLT according to the difference and the activation information of the inactive agent ONU in the new system ONU on the first OLT; finally, the ONU is activated The module 1104 activates the inactive proxy ONU in the new system ONU according to the activation information of the inactive proxy ONU on the second OLT.
  • the ONU activation device 110 is deployed on the second OLT side, and the functions of the second information acquisition module 1102 and the ONU activation module 1104 can both be implemented by the processor and the communication unit of the network device where the second OLT is located.
  • the ONU activation device 90 for the specific details of the ONU activation device 90, the ONU activation device 100, and the ONU activation device 110 implementing the corresponding ONU activation method, please refer to the introduction of the foregoing embodiment, which will not be repeated here.
  • This embodiment also provides an ONU control device applied to the ONU side of the new system.
  • the ONU control device mainly implements the function of activating the proxy ONU. Please refer to the schematic structural diagram of the ONU control device 120 shown in FIG. 12 below.
  • the first activation control module 1202 is used to activate on the second OLT in the new system.
  • the activation information obtaining module 1204 is used to obtain activation information generated by the ONU of the new system that is activated on the first OLT.
  • the activation proxy forwarding module 1206 is configured to send activation information to the second OLT through the service channel.
  • the activation information acquisition module 1204 can obtain the activation information of the ONU of the new system by checking when other ONUs in the new system are activated on the first OLT; or the activation information acquisition module 1204 can also receive the activation of the ONU of the new system sent by the first OLT information.
  • the activation information acquisition module 1204 when the activation information acquisition module 1204 acquires the activation information generated by the ONU of the new system activating on the first OLT, it can pass through the activation process from other ONUs in the new system to the first OLT. Check to obtain the activation information; it can also receive the activation information of the ONU of the new system sent by the first OLT.
  • the ONU control device 120 is deployed on the ONU.
  • the functions of the first activation control module 1202, the activation information acquisition module 1204, and the activation proxy forwarding module 1206 in the ONU control device 120 can all be implemented by the ONU processor and the communication unit.
  • the ONU activation method implemented by the ONU control device 120 please refer to the introduction of the foregoing embodiment, which will not be repeated here.
  • the ONU control device 130 includes a second activation control module 1302 for activation on the first OLT in the existing system through the DAW channel.
  • the ONU control device 130 may receive the broadcast message sent by the second OLT to determine the activation agent ONU, the activation proxy ONU is a new system ONU that has been activated by the second OLT before the ONU activates on the first OLT in the existing system through the DAW channel.
  • the ONU control device 120 or the ONU control device 130 if the first OLT does not exist in the PON system, the ONU control device 120 or the ONU control device 130 is activated on the second OLT through the third wavelength channel, and the third wavelength channel is Channels other than business channels and DAW channels.
  • the ONU control device 120 or the ONU control device 130 determines whether there is a first OLT in the PON system by determining whether there is a predefined channel between the second OLT and the first OLT or by determining whether a message sent by the first OLT is received.
  • the ONU control device 120 or the ONU control device 130 determines that there is a predefined channel between the second OLT and the first OLT, or determines that a message sent by the first OLT is received, it is determined that the first OLT exists in the PON system.
  • the ONU control device 120 or the ONU control device 130 After the ONU control device 120 or the ONU control device 130 is activated on the second OLT through the third wavelength channel, if the wavelength of the third wavelength channel and the wavelength of the upstream service channel do not coexist, the ONU control device 120 or the ONU control device 130 Control to close the third wavelength channel; if the wavelength of the third wavelength channel and the wavelength of the upstream service channel coexist, the ONU control device 120 or the ONU control device 130 processes the third wavelength channel in any of the following ways: The third wavelength channel is used as the supplementary channel of the service channel; the third wavelength channel is used as the backup channel of the service channel; the third wavelength channel is controlled to enter the energy-saving state; the third wavelength channel is controlled to be closed.
  • This embodiment provides a storage medium that stores at least one of a first ONU activation program, a second ONU activation program, a third ONU activation program, and a fourth ONU activation program.
  • the first ONU activation program may be executed by one or more processors to implement the steps on the first OLT side in the ONU activation method of Embodiment 1 or Embodiment 2.
  • the second ONU activation program may be executed by one or more processors to implement the steps on the first OLT side in the ONU activation method of the third embodiment.
  • the third ONU activation program may be executed by one or more processors to implement the steps on the second OLT side in the ONU activation method of Embodiment 1 to Embodiment 3.
  • the fourth ONU activation program may be executed by one or more processors to implement the steps on the ONU side in the ONU activation method of the first to third embodiments.
  • the network device 14 includes a processor 141, a memory 142, and a communication bus 143.
  • the communication bus 143 is used to implement connection and communication between the processor 141 and the memory 142.
  • the processor 141 is configured to execute the first ONU activation program stored in the memory to implement the steps on the first OLT side in the ONU activation method in the foregoing embodiment; or the processor 141 is configured to execute the second ONU activation program stored in the memory , To implement the steps on the second OLT side in the ONU activation method in the foregoing embodiment; or the processor 141 is configured to execute the third ONU activation program stored in the memory to implement the activation agent ONU side in the ONU activation method in the foregoing embodiment Step; or the processor 141 is configured to execute the fourth ONU activation program stored in the memory to implement the steps on the non-activated proxy ONU side in the ONU activation method in the foregoing embodiment.
  • This embodiment also provides a PON system, which includes an existing system and a new system.
  • the existing system includes the first OLT, and the new system includes the second OLT and multiple ONUs.
  • the new system can be a low-latency system, the second OLT is a low-latency OLT, and the ONU in the new system is a low-latency ONU.
  • the new system ONU includes activated proxy ONU and non-activated proxy ONU.
  • the first OLT is a network device where the processor 141 executes the first ONU activation program
  • the second OLT is a network device where the processor 141 executes the second ONU activation program
  • the activation agent ONU executes the third ONU activation program for the processor 141
  • the inactive proxy ONU is a network device for which the processor 141 executes the fourth ONU activation program.
  • the network equipment and PON system provided in this embodiment can implement the process of the ONU activation method provided in the foregoing embodiment.
  • the ONU activation method provided in the foregoing embodiment.
  • details of implementing the ONU activation method please refer to the introduction of the foregoing embodiment, which will not be repeated here.
  • the new system ONU activates to the first OLT in the existing system through the DAW channel, so the new system ONU does not need to activate the second OLT in the new system through the DAW channel.
  • the channel is only used for communication between the ONU of the new system and the first OLT, and does not need to be connected to the second OLT through an optical splitter, so the problem of signal attenuation of the existing system OLT caused by the use of an optical splitter is avoided. Therefore, the solution provided by the embodiment of the present disclosure can not only reduce the delay impact on the service when the ONU is activated, but also does not affect the communication effect of the existing system due to the existence of the optical splitter, and improves the communication performance of the enhanced PON.
  • the new system ONU activates on the first OLT of the existing system, and then the first OLT sends the activation information of the new system ONU
  • the second OLT of the new system or the activation agent ONU that has been activated by the second OLT sends the activation information to the second OLT, so that the second OLT in the new system does not need to separately send the ONU of each new system on the service channel.
  • the quiet window is opened, the activation information of each ONU in the new system can be obtained, and then the activation of the ONU of the new system on the second OLT can be realized.
  • the functional modules/units in the system, and the device can be implemented as software (which can be implemented by program code executable by a computing device) , Firmware, hardware and their appropriate combination.
  • the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. The components are executed cooperatively.
  • Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit .
  • the computer-readable medium may include computer storage Medium (or non-transitory medium).
  • computer storage Medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Flexible, removable and non-removable media.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device, or Any other medium used to store desired information and that can be accessed by a computer. Therefore, the present disclosure is not limited to any specific hardware and software combination.

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Abstract

本公开实施例提供一种激活方法、装置、控制装置、网络设备、光网络系统。新系统ONU通过在已有系统的第一OLT上进行激活，然后由第一OLT将新系统ONU的激活信息发送给新系统的第二OLT或者是由已经被第二OLT激活的激活代理ONU将激活信息发送给第二OLT，从而实现新系统ONU在第二OLT上的激活。

Description

激活方法、装置、控制装置、网络设备、光网络系统 技术领域
本公开涉及(但不限于)通信领域。
背景技术
无源光网络(Passive Optical Network，PON)中的传输延迟很大一部分原因是在光网络单元(Optical Network Unit，ONU)进行激活时，光线路终端(optical line terminal，OLT)向待激活OLU开放安静窗口造成的。在开放安静窗口期间，只有待激活的ONU被允许发送用于激活的上行信号，而其他已经完成激活的、正常工作的ONU不能在安静窗口发送上行信号。因此，如果正常工作的ONU正好在安静窗口期间有上行数据要发送，则其发送的上行数据将会被延迟。
目前标准组织中也在讨论在专用于激活的通道上进行安静窗口开放，但是存在以下几个问题：当专用于激活的通道采用已有系统中的专用激活波长(Dedicated Activation Wavelength，DAW)波长资源时，DAW在上行方上既要实现ONU与低延迟OLT的通信，又要实现ONU与已有系统中的OLT的通信，因此在DAW上发送的信号需要通过分光器进行分光处理，而经过分光器的处理后，信号会有约3dB的衰减，这会对已有系统造成影响，严重的情况下，已有系统OLT甚至无法正确解析DAW通道上的信号。
发明内容
本公开实施例提供一种ONU激活方法，包括：第一OLT通过DAW通道激活新系统ONU并获取新系统ONU的激活信息，第一OLT为已有系统中的OLT；以及第一OLT将新系统ONU的激活信息发送给新系统中的第二OLT。
本公开实施例还提供一种ONU激活方法，包括：第二OLT获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息，第二 OLT为新系统中的OLT，激活信息在新系统ONU通过DAW通道到第一OLT上激活的过程中产生；以及第二OLT根据激活信息对新系统ONU进行激活。
本公开实施例还提供一种ONU激活方法，包括：ONU获取新系统ONU在已有系统中的第一OLT上进行激活所产生的激活信息；以及所述ONU通过业务通道将所述激活信息发送给新系统中的第二OLT。
本公开实施例还提供一种ONU激活方法，包括：ONU通过DAW通道在已有系统中的第一OLT上进行激活，ONU为新系统中的ONU。
本公开实施例还提供一种ONU激活装置，应用于已有系统中的第一OLT侧，包括：第一信息获取模块，用于通过DAW通道激活新系统ONU并获取新系统ONU的激活信息；以及激活信息发送模块，用于将新系统ONU的激活信息发送给新系统中的第二OLT。
本公开实施例还提供一种ONU激活装置，应用于新系统中的第二OLT侧，包括：第二信息获取模块，用于获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息，激活信息在新系统ONU通过DAW通道到第一OLT上激活的过程中产生；以及ONU激活模块，用于根据激活信息对新系统ONU进行激活。
本公开实施例还提供一种ONU控制装置，包括：第一激活控制模块，用于在新系统中的第二OLT上进行激活；激活信息获取模块，用于获取新系统ONU在已有系统中的第一OLT上进行激活所产生的激活信息；以及激活代理转发模块，用于通过业务通道将激活信息发送给第二OLT。
本公开实施例还提供一种ONU控制装置，包括：第二激活控制模块，用于ONU通过DAW通道在已有系统中的第一OLT上进行激活，ONU为新系统中的ONU。
本公开实施例还提供一种网络设备，网络设备包括处理器、存储器及通信总线，通信总线用于实现处理器和存储器之间的连接通信，处理器用于执行存储器中存储的第一ONU激活程序，以实现上述第一种ONU激活方法；或者处理器用于执行存储器中存储的第二ONU激活程序，以实现上述第二种ONU激活方法；或者处理器用于执行存储器 中存储的第三ONU激活程序，以实现上述第三种ONU激活方法；或者处理器用于执行存储器中存储的第四ONU激活程序，以实现上述第四种ONU激活方法。
本公开实施例还提供一种PON系统，包括已有系统与新系统，已有系统中包括第一OLT，新系统中包括第二OLT与多个ONU，第一OLT为上述处理器执行第一ONU激活程序的网络设备，第二OLT为上述处理器执行第二ONU激活程序的网络设备，多个ONU中的部分为上述处理器执行第三ONU激活程序网络设备，多个ONU中的其他部分为上述处理器执行第四ONU激活程序网络设备。
本公开实施例还提供一种存储介质，存储介质中存储有第一ONU激活程序、第二ONU激活程序、第三ONU激活程序以及第四ONU激活程序中的至少一个，第一ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现上述第一种ONU激活方法；第二ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现上述第二种ONU激活方法；第三ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现上述第三种ONU激活方法；第四ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现上述第四种ONU激活方法。
附图说明
图1为根据本公开实施例的PON系统中OLT与ONU的通信示意图；
图2为根据本公开实施例的新系统ONU通过DAW通道进行激活的示意图；
图3为根据本公开实施例的ONU激活方法的一种交互流程图；
图4为根据本公开实施例的ONU激活方法的另一种交互流程图；
图5为根据本公开实施例的ONU激活方法的流程图；
图6为根据本公开实施例的ONU激活方法的流程图；
图7为根据本公开实施例的ONU激活方法的流程图；
图8为根据本公开实施例的ONU激活方法的流程交互图；
图9为根据本公开实施例的应用于第一OLT侧的ONU激活装置的一种结构示意图；
图10为根据本公开实施例的应用于第一OLT侧的ONU激活装置的另一种结构示意图；
图11为根据本公开实施例的应用于第二OLT侧的ONU激活装置的结构示意图；
图12为根据本公开实施例的应用于ONU侧的ONU控制装置的一种结构示意图；
图13为根据本公开实施例的应用于ONU侧的ONU控制装置的另一种结构示意图；以及
图14为根据本公开实施例的网络设备的硬件结构示意图。
具体实施方式
为了使本公开的目的、技术方案及优点更加清楚明白，下面通过具体实施方式结合附图对本公开实施例作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本公开，并不用于限定本公开。
PON传统网络架构如图1所示，OLT和ONU间的通道既传输数据，也传输管理信息，即，OLT 11和ONU 12间通过一个通道进行通信。随着移动网络的发展，PON逐渐成为移动前传、移动回传、传感网络、车载网络的承载技术之一，这些网络业务在应用过程中对移动网络、甚至作为承载的PON的传输延迟要求很严格。
PON中的传输延迟包括：光传输延迟，开放安静窗口造成的延迟以及带宽分配延迟等。光传输延迟与光纤距离相关，20Km的传输时间约100us。
开放安静窗口用于OLT发现ONU、测距ONU，属于OLT和ONU之间通道连接初始化带来的开销。为了发现与距OLT 20Km的ONU，有必要打开200us的安静窗口，在这期间正常工作的ONU(即，已经被OLT发现并测距的ONU)不能与OLT进行通常的通信，必须等待安静窗口关闭之后才能与OLT进行正常的业务往来。而且，为了快速发现 ONU，OLT需周期性地开放安静窗口，该周期与实际应用相关，如果希望ONU能够在秒级别注册ONU，则该周期应该是秒级别，即，在每1秒中必须开放最大200us的安静窗口。这种情况下，正常工作的ONU发送的上行数据可能会频繁遭遇200us的延迟。除了ONU在OLT上注册需要开放安静窗口，OLT在对ONU进行测距时，也需要开放安静窗口。所以，ONU在OLT上激活的过程会严重影响已经激活的ONU的业务传输时延，降低用户的通信体验。
因此，如果ONU通过自己的业务通道来实现在OLT上的激活，则会严重影响其他ONU的业务。相关技术中提出了采用DAW资源专门进行ONU激活的方案，避免对业务通道上通信业务造成延迟影响。但因为DAW是已有系统中的通信资源，如图2所示，当PON系统2中同时存在已有系统与新系统(例如，低延迟系统)的时候，传统ONU(Legacy ONU)221需要在传统OLT(Legacy OLT)211上激活，而新系统ONU 222则需要在新系统OLT 212上进行激活。在这种情况下，如果使用已有系统中的DAW来实现ONU的注册与测距，则上行DAW通道就既需要连接Legacy ONU 221与Legacy OLT 211，又需要连接新系统ONU222与新系统OLT 212，因此，需要在DAW通道上设置分光器23。分光器23可以将DAW通道分为两个通道，分别向Legacy OLT 211与新系统ONU 222发送信息。而分光器23的设置将会导致DAW通道上信号的衰减，从而影响已有系统中Legacy OLT 211对DAW通道上信号的解析。
本公开实施例提供的激活方法、装置、控制装置、网络设备、光网络系统，主要用于解决相关技术中在利用已有系统中的波长资源作为第三波长时需要使用分光器，导致已有系统中信号衰减，影响已有系统通信的问题。
实施例一：
为了解决上述问题，本实施例提供一种ONU激活方法，该方法主要涉及到已有系统OLT、新系统OLT以及新系统ONU之间的交互。为了便于介绍，在后文中将已有系统OLT称为“第一OLT”，将新系 统OLT称为“第二OLT”，请参见图3示出的ONU激活方法中新系统ONU、第一OLT以及第二OLT三者间的交互流程图。
在步骤S302，第一OLT通过DAW通道激活新系统ONU并获取新系统ONU的激活信息。
ONU在OLT上的激活过程包括注册过程与测距过程，在注册过程中，OLT主要是获得ONU的序列号并要确定ONU的序列号是否在认证信息中存在，而在测距过程中，OLT发送测距请求后，ONU需要向OLT发送测距响应，OLT计算得到测距结果，在本地保存测距结果或者向ONU发送测距结果。因此，本实施例中的激活信息包括新系统ONU标识信息和测距结果中的至少一种。ONU标识信息可以为ONU的SN(序列号)，在本实施例的其他一些示例当中，ONU标识信息还可以包括ONU的媒体介入控制层(Media Access Control，MAC)地址、激活认证信息等。在通常情况下，新系统ONU会在第一OLT上完成激活，因此，第一OLT从新系统ONU处获取到的激活信息包括ONU标识信息和测距结果。新系统ONU向第一OLT发送ONU标识信息，第一OLT对新系统ONU认证通过，新系统ONU完成注册，第一OLT和新系统ONU交互测距请求和测距响应，第一OLT计算测距结果，在本地保存测距结果或者向新系统ONU发送测距结果。
在本实施例中，新系统ONU通过DAW通道在第一OLT上进行激活，当然，本领域技术人员可以理解的是，对于已有系统中的ONU，也可以通过DAW通道在第一OLT进行激活。因为新系统ONU和已有系统中ONU都是到第一OLT上进行激活，在DAW通道上不需要将一部分信息发送给第一OLT，另一部分信息发送给第二OLT，因此，在DAW通道上不需要设置分光器，DAW通道只需要实现ONU与第一OLT之间的通信即可，所以，在这种方案中成功去除了PON系统中的分光器。
在对新系统ONU进行激活的过程中，第一OLT可以获取到新系统ONU的激活信息。
在步骤S304，第一OLT将激活信息发送给第二OLT。
因为新系统ONU需要与新系统中的第二OLT建立连接，所以，当新系统ONU被第一OLT激活之后，第一OLT需要将自己获取到的新 系统ONU的激活信息发送给第二OLT，以供第二OLT根据这些新系统ONU的激活信息完成对新系统ONU的激活，实现与新系统ONU间通道的初始化。
在本实施例的一些示例当中，第一OLT可以自己将激活信息发送给第二OLT，在这些示例当中，第一OLT与第二OLT之间有预定义通道。这里所说的预定义通道包括以下几种中的任意一种：1)第一OLT与第二OLT所属芯片的内部通道；2)第一OLT与第二OLT所属线卡的内部通道；3)第一OLT与第二OLT所属设备的内部通道；4)直连通道，例如直连网线；5)通过第三方系统建立的通道，第三方系统可以包括但不限于网管系统。
在本实施例的另外一些示例当中，第一OLT与第二OLT之间不存在预定义通道，或者第一OLT不方便通过自己与第二OLT间的预定义通道向第二OLT发送新系统ONU的激活信息，因此，在这些示例当中，第一OLT需要通过其他方式向第二ONU发送激活信息。第一OLT可以通过新系统ONU向第二OLT发送激活信息，在这些示例当中，将用于向第二OLT发送激活信息的新系统ONU称为“激活代理ONU”。下面结合图4示出的交互流程图对这个ONU激活方案进行说明。
在步骤S402，激活代理ONU通过DAW通道在第一OLT上进行激活。
激活代理ONU是新系统中的ONU，在激活代理ONU到第一OLT上进行激活之前，就已经在第二OLT激活了。可选地，在本实施例的一些示例当中，如果第二OLT发起注册流程，则新系统ONU中的一个或多个ONU可以到第二OLT上进行激活，不过，第二OLT只会将新系统ONU中的一个激活，并将该新系统ONU作为激活代理ONU。甚至在一些情况下，例如，激活代理ONU需要检查其他新系统ONU在第一OLT激活的激活信息，只有指定激活代理ONU后，新系统中的其他ONU才能向已有系统中的第一OLT进行激活。在第二OLT从新系统的各个ONU中确定出当前的激活代理ONU之后，可以通过广播消息通知新系统中的各个ONU，从而让激活代理ONU知道其已经被选择作为激活代理ONU，同时也让其他ONU知道自己没有竞争成功。
激活代理ONU知晓自己作为激活代理ONU之后，可以通过DAW通道在第一OLT上进行激活。在本实施例的一些示例当中，激活代理ONU被要求先于新系统中其他ONU在第一OLT上进行激活，不过在本实施例中，因为激活代理ONU是接收第一OLT发送的激活信息，而不需要自己通过检查等方式获取新系统中其他ONU的激活信息，因此，激活代理ONU可以与新系统中其他ONU一起到第一OLT上进行激活，甚至可以在新系统中其他ONU都已经在第一OLT上激活完成之后再激活。
在步骤S404，激活代理ONU接收第一OLT发送的激活信息。
当新系统中的各个ONU在第一OLT上进行激活的时候，第一OLT会获取在激活过程中产生的激活信息。第一OLT在得到这些激活信息之后可以将这些激活信息发送给激活代理ONU。由于激活代理ONU与第一OLT之间通过DAW通道连接，因此第一OLT可以通过DAW通道将新系统ONU的激活信息发送给激活代理ONU。可以理解的是，第一OLT可以将新系统中所有在其上进行激活过的ONU的激活信息都发送给激活代理ONU，其中包括了激活代理ONU在第一OLT上进行激活时的激活信息。
在步骤S406，激活代理ONU通过业务通道将第一OLT发送的激活信息发送给第二OLT。
激活代理ONU接收到第一OLT发送的激活信息之后，将这些激活信息发送给第二OLT，由于本实施例中新系统ONU与第二OLT之间不存在DAW通道，因此，激活代理ONU可以通过业务通道将自己从第一OLT处获取到的激活信息发送给第二OLT。
第二OLT根据从已有系统中的第一OLT处获得的激活信息，为相应的ONU标识信息(例如ONU的SN)分配ONU-ID，根据激活代理ONU在DAW通道和业务通道上测距结果的差别，对DAW通道上的测距结果进行计算得到业务通道上的测距结果。
在本实施例中，无论第二OLT通过何种方式获取新系统ONU在第一OLT上的激活信息，为了直接根据新系统ONU在第一OLT上的激活信息实现这些新系统ONU在本端的激活，第二OLT都会确定出一个 激活代理ONU。激活代理ONU首先会被第二OLT激活，因此，第二OLT可以获取到激活代理ONU在本OLT(即，第二OLT)上的激活信息；随后，激活代理ONU又会到第一OLT上进行激活，因此，第二OLT还可以通过激活代理ONU的转发或者是自己与第一OLT间的预定义通道获取到激活代理ONU在第一OLT上的激活信息。为了便于介绍，这里将ONU在第一OLT上的激活信息称为“第一激活信息”，并且将ONU在第二OLT上的激活信息称为“第二激活信息”。
获取到激活代理ONU的第一激活信息与第二激活信息之后，第二OLT可以确定出第一激活信息与第二激活信息的差异，即，激活代理ONU与第一OLT、第二OLT之间的距离差值。由于任意一个新系统ONU在第一OLT上激活的激活信息与其在第二OLT上激活的激活信息的差异是相同的，因此，第二OLT确定出的差异可以表征任意一个新系统ONU在第二OLT上激活的激活信息与其在第一OLT上激活的激活信息的差异。故，当第二OLT获取到其他非激活代理ONU在第一OLT上的激活信息(即，非激活代理ONU的第一激活信息)后，就可以结合上述差异确定出这些非激活代理ONU在第二OLT上的激活信息(即，非激活道理ONU的第二激活信息)，从而根据非激活代理ONU在第二OLT上的激活信息对非激活代理ONU进行激活。
可以理解的是，在本实施例中激活代理ONU是可以更换的，例如，在一些情境下，原本的激活代理ONU不适合继续作为激活代理ONU，则该ONU可以向第二OLT发起更换请求，让第二OLT重新确定一个新的激活代理ONU。在另外一些情境下，如果第二OLT认为当前的激活代理ONU不适合继续作为激活代理ONU了，则第二激活代理也可以主动发起更换流程。在更换激活代理ONU的时候，第二OLT可能已经激活了多个新系统ONU，因此，当需要更换激活代理ONU的时候，第二OLT可以直接从已经激活的新系统ONU中选择一个，并与选择的ONU进行确认，在确认完成之后，完成激活代理ONU的变更。
如果原本的激活代理ONU在与第二OLT正常完成变更之前离线了，并且当前存在其他已经在第二OLT上激活的新系统ONU，则第二OLT可以将其中一个已经完成激活的新系统ONU作为新的激活代理 ONU；如果当前并不存在其他已经在第二OLT上完成激活的ONU，则第二OLT重新开始激活过程以指定一个激活代理ONU。
值得注意的是，完成激活代理ONU更换后，尚未在第二OLT完成激活的ONU需重新激活，包括那些尚未在第一OLT上进行激活的新系统ONU以及已经在第一OLT上完成激活，但尚未在第二OLT上进行激活的新系统ONU。
根据本公开实施例提供的ONU激活方法，对于新系统ONU，不仅不需要占用业务通道在新系统中的第二OLT上进行激活，而且，因为新系统ONU在利用DAW通道发送激活信息的时候，是将激活信息发送给已有系统中的第一OLT，而不需要利用DAW通道向第二OLT发送信息，因此，不用在DAW通道上设置分光器，避免了对已有系统通信性能的影响。
实施例二：
在实施例一中，新系统ONU在第一OLT上进行激活的激活信息是由第一OLT发送给第二OLT，第一OLT可以自己直接将激活信息发送给第二OLT，也可以通过激活代理ONU将激活信息发送给第二OLT。本实施例提供另外一种ONU激活方法，在这种ONU激活方案当中，第一OLT不需要向第二OLT或者激活代理ONU发送激活信息，请参见图5示出的ONU激活方法的流程图。
在步骤S502，ONU在新系统中的第二OLT上进行激活。
在本实施例中，当第二OLT开启注册流程后，新系统中的ONU可以到第二OLT上进行激活。如果该ONU是新系统中第一个到第二OLT上进行激活的ONU，则该ONU会直接被第二OLT激活并选择作为激活代理ONU。如果同时存在其他ONU与该ONU一起到第二OLT上进行激活，则第二OLT会让这些ONU进行竞争，然后选择其中一个进行激活并将选择出的那个ONU作为激活代理ONU。选择出激活代理ONU之后，第二OLT可以发送与激活代理相关的信息，例如，可以通过广播消息将激活代理ONU信息通知新系统中的各个ONU，使它们知晓当前的激活代理ONU是哪一个，再例如，第二OLT还可以只发送激活代 理ONU已经确定的信息，或者第二OLT通知其他未激活ONU可以开始激活流程了，使得未激活ONU开始通过DAW通道与第一OLT进行激活，并进一步与第二OLT进行激活。
由于本实施例的方案中要规避在DAW通道上设置分光器给已有系统带来影响，因此，新系统ONU与第二OLT之间并不支持DAW通道，所以，激活代理ONU是通过业务通道(例如，低延迟通道)在第二OLT上完成激活。虽然这要求第二OLT开放安静窗口，但因为只有一个ONU会直接在第二OLT上进行激活，而且是在低延迟业务开始之前，因此，不会给业务造成传输时延。对于那些没能成功被选择作为激活代理ONU的新系统ONU，则不能直接在第二OLT上进行激活。
在本实施例的一些示例当中，激活代理ONU已经在第二OLT上激活之后，激活代理ONU可以在第一OLT上检查其他新系统ONU在第一OLT上的激活过程。由于激活代理ONU需要自己获取其他新系统ONU在第一OLT上进行激活的激活信息，因此，在本实施例中，激活代理ONU一般先于新系统中其他ONU到第一OLT上进行激活。当然，激活代理ONU未在第一OLT上激活也可以检查其他ONU在第一OLT上的激活过程。
激活代理ONU到第一OLT上进行激活的时候，可以通过DAW通道实现，激活代理ONU通过DAW通道向第一OLT发送自己的ONU标识信息与测距响应，由第一OLT计算得到激活代理ONU在DAW上的测距结果并发送给激活代理ONU。ONU标识信息可以为ONU的SN，也还可以为ONU的MAC地址或者激活认证信息。
在步骤S504，ONU获取新系统ONU在第一OLT上进行激活所产生的激活信息。
对于激活代理ONU，在第一OLT上激活的过程中，可以获取到自己在第一OLT上激活的信息；对于那些非激活代理ONU，即，对于那些通过第二OLT所发送的广播消息确定当前的激活代理ONU不是自己的新系统ONU，在激活代理ONU在第二OLT上的激活完成之后，这些新系统ONU也会通过DAW到第一OLT上进行激活。在这些非激活代理ONU在第一OLT上进行激活的过程中，激活代理ONU可以对这些激活 过程进行检查，从而获取到非激活代理ONU的激活信息。
在步骤S506，ONU将新系统ONU的激活信息发送给第二OLT。
激活代理ONU获取到新系统ONU在第一OLT上进行激活所产生的激活信息之后，可以将获取到的激活信息发送给第二OLT，由于本实施例中新系统ONU与第二OLT之间并不存在DAW通道，因此，激活代理ONU通过业务通道将自己从第一OLT处获取到的激活信息发送给第二OLT。
第二OLT根据从已有系统中的第一OLT处获得的激活信息，为相应的ONU标识信息分配ONU-ID，对DAW通道上的测距结果进行计算，并将计算后的测距结果应用到业务通道上。
在激活代理ONU被第二OLT激活的过程中，第二OLT会获取到激活代理ONU在本OLT上的激活信息，随后，激活代理ONU又会到第一OLT上进行激活，因此，第二OLT还可以获取到激活代理ONU在第一OLT上的激活信息。为了便于介绍，这里将ONU在第一OLT上的激活信息称为“第一激活信息”，并且将ONU在第二OLT上的激活信息称为“第二激活信息”。
获取到激活代理ONU的第一激活信息与第二激活信息之后，第二OLT可以确定出第一激活信息与第二激活信息的差异，即，激活代理ONU与第一OLT、第二OLT之间的距离差值。由于任意一个新系统ONU在第一OLT上激活的激活信息与其在第二OLT上激活的激活信息的差异是相同的，因此，第二OLT确定出的差异可以表征任意一个新系统ONU在第二OLT上激活的激活信息与其在第一OLT上激活的激活信息的差异。故，当第二OLT获取到其他非激活代理ONU在第一OLT上的激活信息(即，非激活代理ONU的第一激活信息)后，就可以结合上述差异确定出这些非激活代理ONU在第二OLT上的激活信息(即，非激活道理ONU的第二激活信息)，从而根据非激活代理ONU在第二OLT上的激活信息对非激活代理ONU进行激活。
毫无疑义的是，本实施例中的激活代理ONU也是可以更换的，具体的更换的过程可以参见实施例一中介绍的更换过程，这里不再赘述。
根据本实施例提供的ONU激活方法，新系统中的第二OLT可以通过选择激活代理ONU，让激活代理ONU先被第二OLT激活，然后再被已有系统中的第一OLT激活，激活代理ONU能够在新系统中其他ONU到第一OLT上进行激活的时候检查这些ONU的激活过程，进而获取到新系统其他ONU的激活信息，并将激活信息反馈到新系统中，使得新系统中的第二OLT可以在不频繁对新系统ONU开放安静窗口的基础上获取到新系统ONU的激活信息，进而完成对新系统ONU的激活，尽可能地减少对业务通道上业务传输的影响。同时，因为新系统中绝大多数ONU是在第一OLT上进行激活，并且第二OLT基于新系统ONU在第一OLT上的激活过程获取激活信息，因此，DAW通道只需要向第一OLT传输ONU的激活信息即可，无须承担ONU到第二OLT的传输任务，这样就避免在DAW通道上设置分光器的做法，有利于保证已有系统的通信性能。
实施例三：
在前述实施例当中，新系统ONU(除了激活代理ONU在第二OLT上的激活过程以外)均采用DAW作为专门用于激活过程的波长资源，不过，DAW是已有系统的波长资源，如果PON系统当中不存在已有系统，例如随着PON系统的不断发展，已有系统逐渐被新系统取代，PON系统中仅剩下了新系统，则对于这种情况，新系统ONU就不能采用已有系统中的DAW资源进行激活，下面结合图6示出的流程图对这种ONU激活方法进行阐述，在本实施例中假定ONU标识信息为ONU的SN。
在步骤S602，OLT在上行第三波长通道上开放安静窗口，并在低延迟下行通道上广播SN请求。
毫无疑义的是，由于本实施例中PON系统中不存在已有系统，所以这里的OLT就是指新系统的OLT，如低延迟OLT；同样的，本实施例中所有的ONU也都是新系统ONU，例如低延迟ONU。
在本实施例中，ONU与OLT之间，有低延迟上行通道、低延迟下行通道，除此以外，还有一个专门用于开放安静窗口实现激活的通道，本实施例中将该通道称为“第三波长通道”。应当理解的是，第三波 长通道既不是低延迟的业务通道，也不是DAW通道。
当OLT需要发现ONU的时候，可以在第三波长通道上开放安静窗口，以供未进行注册的ONU在第三波长通道上行发送SN响应，从而实现注册。在第三波长通道上开放安静窗口的同时，OLT可以通知ONU当前可以进行注册。在本实施例的一些示例当中，OLT可以通过广播的方式通知ONU。可选地，OLT在低延迟下行通道上广播SN请求。
在步骤S604，ONU在上行第三波长通道上发送SN响应。
在ONU上电后，工作在低延迟下行通道对应的波长以及第三波长上，因此，当OLT在低延迟下行通道上发送了SN请求之后，ONU可以接收到。在接收到SN请求之后，ONU通过第三波长通道向OLT发送SN响应。在SN响应当中可以包括ONU的SN序列号。
当OLT接收到ONU发送的SN之后，可以对ONU的SN进行认证，下面提供两种认证方式，应当认识到，这两种认证方式也同样适用于前述实施例一和实施例二中的认证过程。
认证方式一：
在这种认证方式当中，认证信息可以被配置在OLT当中，因此，当OLT接收到ONU发送的SN之后，可以自己利用存储的认证信息对该SN进行认证。在本实施例的一些示例当中，认证信息包括SN以及注册ID(registration ID)。
认证方式二：
不同于认证方式一，认证信息可以被配置在认证服务器中，因此当OLT接收到ONU发送的SN之后，需要将该SN发送给认证服务器，由认证服务器根据其存储的认证信息实现对SN的认证，并将认证结果返回给OLT。OLT根据认证服务器的认证结果确定是否允许对应ONU的注册。
在步骤S606，OLT继续在上行第三波长通道上开放安静窗口，并在低延迟下行通道上发送测距请求。
在OLT接受ONU的注册之后，可以继续保持安静窗口的开放，另一方面，通过低延迟下行通道向ONU发送测距请求，让ONU根据测距请求实现测距。
在步骤S608，ONU在第三波长通道上发送测距响应。
在通过低延迟下行通道接收到测距请求之后，ONU通过第三波长通道向OLT发送自己的测距响应，以便OLT能够根据测距响应得到针对本ONU的测距结果。
OLT收到测距响应后，计算低延迟下行通道和第三波长通道的第一测距结果，并进一步根据第三波长通道(上行)与低延迟上行通道之间的关系计算低延迟下行通道和低延迟上行通道上的第二测距结果，随后将第二测距结果发送给ONU。ONU接收到第二测距结果之后，可以在本地应用该测距结果，进入工作状态，并在低延迟上、下行通道上与OLT进行通信。
在PON中ONU的激活完成以后，对于上行的第三波长通道，ONU可以按照如下几种方式处理。
若第三波长通道的波长与上行业务通道(即，低延迟上行通道)的波长是非共存的，则ONU控制关闭第三波长通道。当第三波长通道的波长与上行业务通道的波长非共存时，为了保证ONU的上行业务能够在上行业务通道上正常传输，ONU必须控制关闭第三波长通道。
若第三波长通道的波长与上行业务通道的波长是共存的，则ONU可以按照以下几种方式中的任意一种处理第三波长通道：1)将第三波长通道作为业务通道的补充通道，扩展上行业务通道的容量；2)将第三波长通道作为业务通道的备用通道，以便在上行业务通道故障的时候，ONU的上行业务能够从第三波长通道上传输，提升PON的容灾性能；3)控制第三波长通道进入节能状态，降低ONU的功耗；4)控制关闭第三波长通道。
本实施例提供的ONU激活方法，主要应用于PON系统中已有系统已经完全过渡到新系统的场景，在这种场景当中，所有ONU都可以通过上行的第三波长通道在OLT上实现注册、测距，从而实现激活。因为上行的第三波长通道是低延迟业务通道以外的通道，因此，在第三波长通道上进行开放安静窗口，不会影响到已经激活的ONU的业务传输，相较于在低延迟业务通道上开放安静窗口的做法，提升了PON系统的通信性能。
实施例四：
在实施例一与实施例二中，已有系统明确存在，因此ONU可以通过在第一OLT的激活过程实现在第二OLT上的激活；在实施例三当中，已有系统明确不存在，因此所有ONU都毫无疑义地到新系统的OLT上进行激活。也就是说，当前是否存在已有系统会影响到ONU采用何种方案进行激活，如果当前存在已有系统，并且ONU选择实施例三的方案进行激活，或者是当前已经不存在已有系统，但ONU仍然采用实施例一或实施例二的方案进行激活，则都是不恰当的，会导致ONU不能正常被激活。为了保证在PON系统从已有系统向新系统过渡的过程中，ONU始终能够正常激活，本实施例提供一种机制，请参见图7示出的流程图。
在步骤S702，第二OLT判断当前的PON中是否存在已有系统。
若判断结果为是，确定当前的PON系统当中尚且存在已有系统，则进入S704；否则进入S706。
在本实施例的一些示例当中，第二OLT可以判断自身与第一OLT之间是否存在预定义通道，或者判断ONU是否有接收到第一OLT发送的信息，若第二OLT确定自身与第一OLT之间存在预定义通道，以及/或者ONU接收过由第一OLT发送的信息，则说明PON系统中当前存在第一OLT，即，存在已有系统。
在步骤S704，第二OLT执行基于第一OLT到第二OLT的激活流程。
如果第二OLT确定当前的PON系统当中存在已有系统，则第二OLT可以让新系统ONU到第一OLT上进行激活，并且可以通过第一OLT获取到新系统ONU的激活信息，或者是通过激活代理ONU获取到新系统ONU的激活信息。具体的实现过程请参见前述实施例一与实施例二的介绍，这里不再赘述。
在步骤S706，第二OLT通过第三波长通道实现对新系统ONU的激活流程。
如果第二OLT确定当前的PON系统当中不存在已有系统，则ONU 不可能在第一OLT上进行激活，并且不可能基于ONU在第一OLT上的激活过程获取到ONU的激活信息，因此第二OLT可以让ONU通过DAW以及业务通道(低延迟通道)以外的第三波长通道直接到第二OLT上进行激活。具体实现方式可以参见实施例三中的介绍。
本实施例提供的ONU激活方法，适用于PON系统逐步从已有系统过渡到新系统的情景，这样，第二OLT可以根据是否存在已有系统来灵活决定所使用的激活方案，从而让ONU能够以更小的时延代价，更小的系统性能代价实现激活。
实施例五：
本实施例将结合示例对前述各实施例中提供的ONU激活方法进行进一步说明。在本实施例中，第一OLT为已有系统OLT，第二OLT为低延迟OLT，新系统ONU为低延迟ONU。低延迟ONU既支持DAW通道，又支持低延迟通道。低延迟通道用于低延迟ONU与低延迟OLT通信，并且包括低延迟上行通道和低延迟下行通道。DAW仅用于低延迟ONU与已有系统OLT间的通信。
示例1：
低延迟OLT检查当前是否已经有激活代理ONU，如果没有，则在低延迟通道上发起注册过程，直到有一个低延迟ONU完成注册，将这个ONU指定为激活代理ONU。低延迟OLT在下行方向上广播激活代理ONU的信息。
如果低延迟OLT发起注册过程，则ONU参加激活并竞争激活代理ONU。只有在确定激活代理ONU后，所有ONU才能向已有系统OLT进行激活。激活代理ONU被指定后即可与已有系统OLT进行激活，其他ONU在获知激活代理ONU被指定后，可以在下行方向检查低延迟OLT的激活代理ONU信息。如果低延迟OLT尚未指定激活代理ONU，则所有ONU不能与已有系统OLT进行激活，如果低延迟OLT已经指定激活代理ONU，则可以与已有系统OLT进行激活。
在其他ONU与已有系统OLT激活过程中，激活代理ONU检查激 活过程，并记录激活过程中的激活信息。激活信息包括但不限于ONU标识(例如SN)、测距结果等信息，如果其他ONU完成激活，激活代理ONU将这些激活信息报告给低延迟OLT。
低延迟OLT根据激活代理报告的激活信息，为相应的SN分配ONU-ID，对DAW上的测距结果进行计算(具体计算过程可参见实施例一和实施例二)，并且将计算后的测距结果应用到低延迟通道。
请参见图8示出的ONU激活方法的流程交互图。假定在PON系统当中存在3个新系统ONU，分别是ONU1、ONU2以及ONU3，这3个ONU分别与低延迟OLT以及已有系统OLT之间都有通信通道，这3个ONU通过低延迟通道与低延迟OLT进行通信，并且通过DAW通道与已有系统通信。在图8当中，粗的线条表征低延迟系统(即，新系统)中的通信，细线条表示已有系统中的通信。
在步骤S801，低延迟OLT向各ONU广播SN请求(Broadcast SN-request)。
在步骤S802，ONU2向低延迟OLT回复SN响应(SN-response)。
在步骤S803，低延迟OLT为ONU2分配ONU-ID(Assign ONU-ID)。
在步骤S804，低延迟OLT向ONU2发送测距请求(Ranging request)。
在步骤S805，ONU2向低延迟OLT回复测距响应(Ranging response)。
在步骤S806，低延迟OLT向ONU2发送测距结果(Ranging result)。
在步骤S807，低延迟OLT向ONU2发送代理分配信息(Agent assignment)。
在步骤S808，低延迟OLT向各ONU周期性广播DAW激活许可(Periodically Broadcast DAW activation permission)。
在步骤S809，已有系统OLT广播SN请求(Broadcast SN-request)。
在步骤S810，ONU3向已有系统OLT回复SN响应(SN-response)。
这里假定ONU3接收到已有系统OLT的广播SN请求，并且决定 根据广播到已有系统分OLT上进行激活。
在步骤S811，已有系统OLT为ONU3分配ONU-ID(Assign ONU-ID)，同时ONU2通过检查获取已有系统OLT为ONU3分配的ONU-ID(Get assigned ONU-ID)。
在步骤S812，已有系统OLT向ONU3发送测距请求(Ranging request)。
在步骤S813，ONU3向已有系统OLT回复测距响应(Ranging response)。
在步骤S814，已有系统OLT向ONU3发送测距结果(Ranging result)，同时ONU2通过检查获取已有系统OLT向ONU3发送的测距结果(Get ranging result)。
在步骤S815，ONU2将获取到的ONU3的激活信息通过低延迟通道发送给低延迟OLT。
在步骤S816，低延迟OLT为ONU3分配ONU-ID(Assign ONU-ID)。
在步骤S817，低延迟OLT向ONU3发送测距结果(Ranging result)。
至此，ONU3通过在已有系统OLT上的激活过程实现了在低延迟OLT上的激活。
激活代理ONU可以更换，正常情况下，激活代理ONU向低延迟OLT发送更换请求，低延迟OLT与另一个完成激活的ONU确认后，完成激活代理ONU的变更。如果激活代理ONU在低延迟OLT正常完成变更之前离线，则低延迟OLT将其中一个完成激活的ONU作为新的激活代理ONU(存在完成激活的ONU时)，或者重新开始激活过程指定一个激活代理ONU(不存在完成激活的ONU时)。完成激活代理ONU更换后，尚未完成激活的ONU需重新激活，与已有系统OLT的激活也要重新进行。
在本实施方式中，可以按照已有系统方式对ONU进行认证，包括对SN、registration ID的认证等。如果认证信息配置在已有系统OLT中，则认证过程由已有系统OLT完成，如果认证信息配置在认证服务器中，则已有系统OLT通过认证服务器对低延迟ONU进行认证。
在本实施方式中，对低延迟OLT和已有系统OLT的共存场景没有限制，可以是分离的，也可以是集成的，可以继承在同一颗芯片中、或者一块线卡中、或者一个机框中。
示例2：
低延迟OLT判断当前是否已经有激活代理ONU，如果没有，则在低延迟通道上发起注册过程，直到有一个低延迟ONU完成注册，这个ONU被指定为激活代理ONU。
所有ONU上电后都在DAW上激活，即，与已有系统OLT进行激活。
已有系统OLT将所有ONU的激活信息发送给激活代理ONU，激活代理ONU将这些激活信息转发到低延迟OLT，激活信息包括但不限于：SN、测距结果。同样地，低延迟OLT也可以通过激活代理ONU向已有系统OLT发送收到激活信息的确认。
低延迟OLT根据获得的激活信息，为相应的SN分配ONU-ID，对DAW上的测距结果进行计算(具体计算过程参见实施例一和实施例二)，并且将计算后的测距结果应用到低延迟通道。
激活代理ONU可以更换，正常情况下，激活代理ONU向低延迟OLT发送更换请求，低延迟OLT与另一个完成激活的ONU确认后，完成激活代理ONU的变更。如果激活代理ONU在低延迟OLT正常完成变更之前离线，则低延迟OLT将其中一个完成激活的ONU作为新的激活代理ONU(存在完成激活的ONU时)，或者重新开始激活过程指定一个激活代理ONU(不存在完成激活的ONU时)。完成激活代理ONU更换后，尚未完成激活的ONU需重新激活，与已有系统OLT的激活也要重新进行。
在本实施方式中，可以按照已有系统方式对ONU进行认证，包括对SN、registration ID的认证等。如果认证信息配置在已有系统OLT中，则认证过程由已有系统OLT完成，如果认证信息配置在认证服务器中，则已有系统OLT通过认证服务器对低延迟ONU进行认证。
在本实施方式中，对低延迟OLT和已有系统OLT的共存场景没 有限制，可以是分离的，也可以是集成的，可以继承在同一颗芯片中、或者一块线卡中、或者一个机框中。
示例3：
在本实施方式中，低延迟OLT和已有系统OLT之间存在预定的通信方式，这个预定义的通道，可以是同一个芯片内部通道、同一个线卡上的内部通道、同一个设备内部的通道、直连通道(例如，直连网线)或者通过第三方系统如网管系统建立的通道。
所有ONU上电后都在DAW上激活，即，与已有系统OLT进行激活。
已有系统OLT将所有ONU的激活信息通过预定义通道同步到低延迟OLT，激活信息包括但不限于：SN、测距结果。
低延迟OLT根据从已有系统OLT获得的激活信息，为相应的SN分配ONU-ID，对DAW上的测距结果进行计算，并且将计算后的测距结果应用到低延迟通道。
在本实施方式中，可以按照已有系统方式对ONU进行认证，包括对SN、registration ID的认证等。如果认证信息配置在已有系统OLT中，则认证过程由已有系统OLT完成，如果认证信息配置在认证服务器中，则已有系统OLT通过认证服务器对低延迟ONU进行认证。
在本实施方式中，对低延迟OLT和已有系统OLT的共存场景没有限制，可以是分离的，也可以是集成的，可以继承在同一颗芯片中、或者一块线卡中、或者一个机框中。
实施例六：
本实施例提供一种ONU激活装置，应用于已有系统中的第一OLT侧，请参见图9示出的结构示意图，该ONU激活装置90包括第一信息获取模块902与激活信息发送模块904。第一信息获取模块902用于通过DAW通道激活新系统ONU并获取新系统ONU的激活信息。激活信息发送模块904用于将新系统ONU的激活信息发送给新系统中的第二OLT。
上述激活信息包括但不限于ONU标识信息与测距结果中的至少一种。
激活信息发送模块904可以将新系统ONU的激活信息发送给激活代理ONU，激活代理ONU为新系统中已经在第二OLT上激活的ONU；或者激活信息发送模块904也可以将新系统ONU的激活信息通过自身与第二OLT间的预定义通道发送给第二OLT。
上述预定义通道可以是以下几种中的任意一种：1)第一OLT与第二OLT所属芯片的内部通道；2)第一OLT与第二OLT所属线卡的内部通道；3)第一OLT与第二OLT所属设备的内部通道；4)直连通道，例如直连通道；5)通过第三方系统建立的通道，第三方系统可以包括但不限于网管系统。
本实施例还提供一种应用于第一OLT侧的ONU激活装置，第一OLT为已有系统中的OLT，请参见图10，ONU激活装置100包括第一信息获取模块1002，用于通过DAW通道获取新系统ONU的激活信息。
图10中示出的ONU激活装置100不需要关注第二OLT如何获取到ONU在第一OLT上进行激活的激活信息，仅需要对ONU进行激活即可。
图9和图10中示出了两种应用与第一OLT侧的ONU激活装置，ONU激活装置90和ONU激活装置100可以部署在第一OLT上，第一信息获取模块902和1002以及激活信息发送模块904的功能均可以通过第一OLT所在网络设备的处理器与通信单元共同实现。
另外，本实施例还提供一种应用于第二OLT侧的ONU激活装置，第二OLT为新系统中的OLT，请参见图11。
如图11所示，ONU激活装置110包括第二信息获取模块1102与ONU激活模块1104。第二信息获取模块1102用于获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息，激活信息在新系统ONU通过DAW通道到已有系统中的第一OLT上激活的过程中产生。ONU激活模块1104用于根据第二信息获取模块1102获取到的激活信息对新系统ONU进行激活。
第二信息获取模块1102可以接收第一OLT通过预定义通道发送 的激活信息，这里所说的预定义通道可以参照前述介绍。
可替换地，第二信息获取模块1102可以接收激活代理ONU通过业务通道发送的激活信息。在本实施例的一些示例当中，激活代理ONU发送给第二OLT的激活信息由激活代理ONU通过检查新系统ONU在第一OLT上的激活过程获取，或者由激活代理ONU从第一OLT处接收到。
在本实施例的一些示例当中，在第二信息获取模块1102接收激活代理ONU通过业务通道发送的激活信息之前，ONU激活装置110可以先激活一个新系统ONU，并将该新系统ONU确定为当前的激活代理ONU；然后ONU激活装置110通过业务通道向新系统中的各ONU通知当前的激活代理ONU。
在ONU激活装置110将该新系统ONU确定为当前的激活代理ONU之前，可以先确定PON系统中是否存在第一OLT。
在本实施例的一些示例当中，若ONU激活装置110确定PON系统中不存在第一OLT，则ONU激活装置110通过第三波长通道对新系统中的ONU进行激活，第三波长通道为业务通道与DAW通道以外的通道。
在本实施例的一些示例当中，ONU激活模块1104在对新系统ONU进行激活时，可以先确定激活代理ONU在第二OLT上的激活信息与激活代理ONU在第一OLT上的激活信息之间的差异；然后，ONU激活模块1104根据所述差异以及新系统ONU中的非激活代理ONU的在第一OLT上的激活信息确定非激活代理ONU在第二OLT上的激活信息；最后，ONU激活模块1104根据非激活代理ONU在第二OLT上的激活信息对新系统ONU中的非激活代理ONU进行激活。
ONU激活装置110部署在第二OLT侧，第二信息获取模块1102与ONU激活模块1104的功能均可以通过第二OLT所在网络设备的处理器与通信单元共同实现。
对于ONU激活装置90、ONU激活装置100以及ONU激活装置110实现对应ONU激活方法的具体细节，请参见前述实施例的介绍，这里不再赘述。
本实施例还提供一种应用于新系统ONU侧的ONU控制装置，该ONU控制装置主要实现激活代理ONU的功能，下面请参见图12示出的ONU控制装置120的结构示意图。
第一激活控制模块1202用于在新系统中的第二OLT上进行激活。
激活信息获取模块1204用于获取新系统ONU在第一OLT上进行激活所产生的激活信息。
激活代理转发模块1206用于通过业务通道将激活信息发送给第二OLT。
激活信息获取模块1204可以在新系统中其他ONU到第一OLT上激活的过程中通过检查获取新系统ONU的激活信息；或者激活信息获取模块1204也可以接收第一OLT发送的新系统ONU的激活信息。
在本实施例的一些示例当中，在激活信息获取模块1204获取新系统ONU在第一OLT上进行激活所产生的激活信息时，可以在新系统中其他ONU到第一OLT上激活的过程中通过检查获取激活信息；也可以接收第一OLT发送的新系统ONU的激活信息。
ONU控制装置120部署在ONU上，ONU控制装置120中的第一激活控制模块1202、激活信息获取模块1204以及激活代理转发模块1206的功能均可以通过ONU上处理器与通信单元共同实现。对于ONU控制装置120实现ONU激活方法的其他细节，请参见前述实施例的介绍，这里不再赘述。
图12中提供的ONU控制装置120在实现ONU激活方法时，需要第二OLT选择出激活代理ONU。本实施例提供的另外一种ONU控制装置主要实现非激活代理ONU的功能，ONU为新系统中的ONU，如图13所示。该ONU控制装置130包括第二激活控制模块1302，用于通过DAW通道在已有系统中的第一OLT上进行激活。
在本实施例的一种示例当中，在第二激活控制模块1302通过DAW通道在已有系统中的第一OLT上进行激活之前，ONU控制装置130可以接收第二OLT发送的广播消息确定激活代理ONU，激活代理ONU为在ONU通过DAW通道在已有系统中的第一OLT上进行激活之前已经被第二OLT激活的新系统ONU。
无论是对于ONU控制装置120还是ONU控制装置130，如果PON系统中不存在第一OLT，则ONU控制装置120或ONU控制装置130通过第三波长通道在第二OLT上激活，第三波长通道为业务通道与DAW通道以外的通道。
ONU控制装置120或ONU控制装置130通过确定第二OLT与第一OLT之间是否存在预定义通道或通过判断是否有接收到第一OLT发送的消息来确定PON系统中是否存在第一OLT。
若ONU控制装置120或ONU控制装置130确定第二OLT与第一OLT间存在预定义通道，或者确定接收到第一OLT发送的消息，则确定PON系统中存在第一OLT。
ONU控制装置120或ONU控制装置130通过第三波长通道在第二OLT上完成激活之后，若第三波长通道的波长与上行业务通道的波长是非共存的，则ONU控制装置120或ONU控制装置130控制关闭第三波长通道；若第三波长通道的波长与上行业务通道的波长是共存的，则ONU控制装置120或ONU控制装置130按照以下几种方式中的任意一种处理第三波长通道：将第三波长通道作为业务通道的补充通道；将第三波长通道作为业务通道的备用通道；控制第三波长通道进入节能状态；控制关闭第三波长通道。
实施例七：
本实施例提供一种存储介质，该存储介质中存储有第一ONU激活程序、第二ONU激活程序、第三ONU激活程序以及第四ONU激活程序中的至少一个。第一ONU激活程序可被一个或者多个处理器执行，以实现实施例一或实施例二的ONU激活方法中第一OLT侧的步骤。第二ONU激活程序可被一个或者多个处理器执行，以实现实施例三的ONU激活方法中第一OLT侧的步骤。第三ONU激活程序可被一个或者多个处理器执行，以实现实施例一至实施例三的ONU激活方法中第二OLT侧的步骤。第四ONU激活程序可被一个或者多个处理器执行，以实现实施例一至实施例三的ONU激活方法中ONU侧的步骤。
本实施例还提供一种网络设备，请参见图14，该网络设备14 包括处理器141、存储器142及通信总线143。
通信总线143用于实现处理器141和存储器142之间的连接通信。
处理器141用于执行存储器中存储的第一ONU激活程序，以实现前述实施例中ONU激活方法中第一OLT侧的步骤；者或处理器141用于执行存储器中存储的第二ONU激活程序，以实现前述实施例中ONU激活方法中第二OLT侧的步骤；或者处理器141用于执行存储器中存储的第三ONU激活程序，以实现前述实施例中ONU激活方法中激活代理ONU侧的步骤；或者处理器141用于执行存储器中存储的第四ONU激活程序，以实现前述实施例中ONU激活方法中非激活代理ONU侧的步骤。
本实施例还提供一种PON系统，该PON系统中包括已有系统与新系统。已有系统中包括第一OLT，新系统中包括第二OLT与多个ONU。新系统可以为低延迟系统，第二OLT为低延迟OLT，新系统中的ONU为低延迟ONU。新系统ONU包括激活代理ONU与非激活代理ONU。
第一OLT为上述处理器141执行第一ONU激活程序的网络设备，第二OLT为上述处理器141执行第二ONU激活程序的网络设备，激活代理ONU为上述处理器141执行第三ONU激活程序的网络设备，非激活代理ONU为上述处理器141执行第四ONU激活程序的网络设备。
本实施例提供的网络设备以及PON系统，能够实现前述实施例中提供的ONU激活方法的流程，对于实现ONU激活方法的细节，请参见前述实施例的介绍，这里不再赘述。
本实施例提供的网络设备以及PON系统，新系统ONU通过DAW通道向已有系统中的第一OLT进行激活，因此新系统ONU不需要通过DAW通道向新系统中的第二OLT进行激活，DAW通道仅用于新系统ONU与第一OLT间通信，不需要通过分光器连接到第二OLT，所以避免了使用分光器造成已有系统OLT信号衰减的问题。故，本公开实施例提供的方案不仅能够减小ONU激活时对业务的延迟影响，而且，不会因为分光器的存在影响已有系统的通信效果，提升了增强PON的通信性能。
本公开实施例提供的激活方法、装置、控制装置、网络设备、光网络系统，新系统ONU通过在已有系统的第一OLT上进行激活，然后由第一OLT将新系统ONU的激活信息发送给新系统的第二OLT或者由已经被第二OLT激活的激活代理ONU将激活信息发送给第二OLT，从而使得新系统中的第二OLT在不需要在业务通道上分别向各个新系统ONU开放安静窗口的情况下，就能够获取到新系统中各ONU的激活信息，进而实现新系统ONU在第二OLT上的激活。
显然，本领域的技术人员应该明白，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件(可以用计算装置可执行的程序代码来实现)、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，计算机可读介质可以包括计算机存储介质(或非暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM，数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。所以，本公开不限制于任何特定的硬件和软件结合。
以上内容是结合具体的实施方式对本公开实施例所作的进一步详细说明，不能认定本公开的具体实施只局限于这些说明。对于本公开所属技术领域的普通技术人员来说，在不脱离本公开构思的前提下，做出的简单推演或替换，都应当视为属于本公开的保护范围。

Claims (32)

  1. 一种光网络单元ONU激活方法，包括：
    第一光线路终端OLT通过专用激活波长DAW通道激活新系统ONU并获取所述新系统ONU的激活信息，其中，所述第一OLT为已有系统中的OLT；以及
    所述第一OLT将所述新系统ONU的激活信息发送给新系统中的第二OLT。
  2. 如权利要求1所述的ONU激活方法，其中，所述激活信息包括ONU标识信息与测距结果中的至少一种。
  3. 如权利要求1或2所述的ONU激活方法，其中，所述第一OLT将所述新系统ONU的激活信息发送给新系统中的第二OLT的方式包括以下任意一种：
    所述第一OLT将所述新系统ONU的激活信息发送给激活代理ONU，并通过激活代理ONU将所述激活信息发送给所述第二OLT，其中，所述激活代理ONU为所述新系统中已经在所述第二OLT上激活的ONU；
    所述第一OLT将所述新系统ONU的激活信息通过所述第一OLT与所述第二OLT间的预定义通道发送给所述第二OLT。
  4. 如权利要求3所述的ONU激活方法，其中，所述预定义通道包括以下任意一种：
    所述第一OLT与所述第二OLT所属芯片的内部通道；
    所述第一OLT与所述第二OLT所属线卡的内部通道；
    所述第一OLT与所述第二OLT所属设备的内部通道；
    直连通道；
    通过第三方系统建立的通道。
  5. 一种光网络单元ONU激活方法，包括：
    第二光线路终端OLT获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息，其中，所述第二OLT为新系统中的OLT，并且在所述新系统ONU通过专用激活波长DAW通道到所述第一OLT上激活的过程中产生所述激活信息；以及
    所述第二OLT根据所述激活信息对所述新系统ONU进行激活。
  6. 如权利要求5所述的ONU激活方法，其中，第二OLT获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息的步骤包括：
    所述第二OLT接收所述第一OLT通过所述第一OLT与所述第二OLT间的预定义通道发送的所述激活信息；或者
    所述第二OLT接收激活代理ONU通过业务通道发送的所述激活信息，其中，所述激活代理ONU为新系统中已经在所述第二OLT上激活的ONU。
  7. 如权利要求6所述的ONU激活方法，其中，
    所述激活代理ONU发送给所述第二OLT的所述激活信息由所述激活代理ONU通过检查所述新系统ONU在所述第一OLT上的激活过程获取；或者
    所述激活代理ONU发送给所述第二OLT的所述激活信息由所述激活代理ONU从所述第一OLT处接收。
  8. 如权利要求6所述的ONU激活方法，其中，所述预定义通道包括以下任意一种：
    所述第一OLT与所述第二OLT所属芯片的内部通道；
    所述第一OLT与所述第二OLT所属线卡的内部通道；
    所述第一OLT与所述第二OLT所属设备的内部通道；
    直连通道；
    通过第三方系统建立的通道。
  9. 如权利要求6所述的ONU激活方法，其中，在所述第二OLT 接收激活代理ONU通过业务通道发送的所述激活信息的步骤之前，所述方法还包括：
    所述第二OLT激活一个新系统ONU，并将所述一个新系统ONU确定为当前的激活代理ONU。
  10. 如权利要求9所述的ONU激活方法，其中，在所述第二OLT将所述一个新系统ONU确定为当前的激活代理ONU的步骤之前，所述方法还包括：
    所述第二OLT确定无源光网络PON系统中是否存在所述第一OLT。
  11. 如权利要求10所述的ONU激活方法，其中，所述第二OLT确定PON系统中是否存在所述第一OLT的步骤包括：
    所述第二OLT通过判断所述第二OLT与所述第一OLT之间是否存在预定义通道，或者通过判断新系统ONU是否有接收到所述第一OLT发送的消息，来确定所述PON系统中是否存在第一OLT；以及
    响应于所述第二OLT确定所述第二OLT与所述第一OLT间存在预定义通道，或者响应于所述新系统ONU有接收到所述第一OLT发送的消息，确定所述PON系统中存在所述第一OLT。
  12. 如权利要求10所述的ONU激活方法，其中，响应于所述第二OLT确定所述PON系统中不存在第一OLT，所述方法还包括：
    所述第二OLT通过第三波长通道对所述新系统中的ONU进行激活，其中，所述第三波长通道为所述业务通道与所述DAW通道以外的通道。
  13. 如权利要求6所述的ONU激活方法，其中，在所述第二OLT接收激活代理ONU通过业务通道发送的所述激活信息的步骤之前，所述方法还包括：
    所述第二OLT通过业务通道向新系统中的各ONU通知以下信息之一：当前的激活代理ONU的信息、已经确定激活代理ONU的信息、 通过DAW与所述第一OLT进行激活的信息。
  14. 如权利要求5至13中任一项所述的ONU激活方法，其中，所述第二OLT根据所述激活信息对所述新系统ONU进行激活的步骤包括：
    所述第二OLT确定激活代理ONU在所述第二OLT上的激活信息与所述激活代理ONU在所述第一OLT上的激活信息之间的差异，其中，所述激活代理ONU为在所述第二OLT获取新系统ONU在所述第一OLT上的激活信息之前已经在所述第二OLT上激活的新系统ONU；
    所述第二OLT根据所述差异以及所述新系统ONU中的非激活代理ONU的在所述第一OLT上的激活信息确定所述非激活代理ONU在所述第二OLT上的激活信息；以及
    所述第二OLT根据所述非激活代理ONU在所述第二OLT上的激活信息对所述新系统ONU中的非激活代理ONU进行激活。
  15. 一种光网络单元ONU激活方法，包括：
    ONU在新系统中的第二光线路终端OLT上进行激活；
    所述ONU获取新系统ONU在已有系统中的第一OLT上进行激活所产生的激活信息；以及
    所述ONU通过业务通道将所述激活信息发送给所述第二OLT。
  16. 如权利要求15所述的ONU激活方法，其中，在所述ONU获取新系统ONU在已有系统中的第一OLT上进行激活所产生的激活信息的步骤之前，所述方法还包括：
    所述ONU通过专用激活波长DAW通道在所述第一OLT上进行激活。
  17. 如权利要求16所述的ONU激活方法，其中，所述ONU获取所述新系统ONU在所述第一OLT上进行激活所产生的激活信息的步骤包括：
    所述ONU在所述新系统中其他ONU到所述第一OLT上激活的过程中通过检查获取所述激活信息；或者
    所述ONU接收所述第一OLT发送的所述新系统ONU的激活信息。
  18. 如权利要求15至17中任一项所述的ONU激活方法，还包括：
    响应于无源光网络PON系统中不存在所述第一OLT，所述ONU通过第三波长通道在所述第二OLT上激活，其中，所述第三波长通道为所述业务通道与DAW通道以外的通道。
  19. 如权利要求18所述的ONU激活方法，其中，
    所述ONU通过判断所述第二OLT与所述第一OLT之间是否存在预定义通道，或者通过判断所述ONU是否有接收到所述第一OLT发送的消息，来确定所述PON系统中是否存在所述第一OLT；
    响应于所述ONU确定所述第二OLT与所述第一OLT间存在预定义通道，或者响应于所述ONU确定所述ONU接收到所述第一OLT发送的消息，所述ONU确定所述PON系统中存在所述第一OLT。
  20. 如权利要求18所述的ONU激活方法，其中，在所述ONU通过第三波长通道在所述第二OLT上激活的步骤之后，所述方法还包括：
    响应于所述第三波长通道的波长与上行业务通道的波长是非共存的，所述ONU控制关闭所述第三波长通道；
    响应于所述第三波长通道的波长与上行业务通道的波长是共存的，所述ONU按照以下任意一种方式处理所述第三波长通道：
    将所述第三波长通道作为所述业务通道的补充通道；
    将所述第三波长通道作为所述业务通道的备用通道；
    控制所述第三波长通道进入节能状态；
    控制关闭所述第三波长通道。
  21. 一种光网络单元ONU激活方法，包括：
    ONU通过专用激活波长DAW通道在已有系统中的第一光线路终端OLT上进行激活，其中，所述ONU为新系统中的ONU。
  22. 如权利要求21所述的ONU激活方法，其中，在所述ONU通过DAW通道在已有系统中的第一OLT上进行激活的步骤之前，所述方法还包括：
    所述ONU接收新系统中的第二OLT发送的广播消息以确定激活代理ONU，其中，所述激活代理ONU为在所述ONU通过所述DAW通道在已有系统中的第一OLT上进行激活之前已经被所述第二OLT激活的新系统ONU，并且
    所述ONU通过所述DAW通道在已有系统中的第一OLT上进行激活的步骤包括：
    所述ONU在所述激活代理ONU被所述第一OLT激活后，通过所述DAW通道在所述第一OLT上进行激活。
  23. 如权利要求21或22所述的ONU激活方法，还包括：
    响应于无源光网络PON系统中不存在所述第一OLT，所述ONU通过第三波长通道在所述第二OLT上激活，其中，所述第三波长通道为业务通道与所述DAW通道以外的通道。
  24. 如权利要求23所述的ONU激活方法，其中，所述ONU通过判断所述第二OLT与所述第一OLT之间是否存在预定义通道，或者通过判断所述ONU是否有接收到所述第一OLT发送的消息，来确定所述PON系统中是否存在所述第一OLT；
    响应于所述ONU确定所述第二OLT与所述第一OLT间存在预定义通道，或者响应于所述ONU确定所述ONU接收到所述第一OLT发送的消息，所述ONU确定所述PON系统中存在所述第一OLT。
  25. 如权利要求23所述的ONU激活方法，其在，在所述ONU通过第三波长通道在所述第二OLT上激活的步骤之后，所述方法还包括：
    响应于所述第三波长通道的波长与上行业务通道的波长是非共存的，所述ONU控制关闭所述第三波长通道；
    响应于所述第三波长通道的波长与上行业务通道的波长是共存的，所述ONU按照以下任意一种方式处理所述第三波长通道：
    将所述第三波长通道作为所述业务通道的补充通道；
    将所述第三波长通道作为所述业务通道的备用通道；
    控制所述第三波长通道进入节能状态；
    控制关闭所述第三波长通道。
  26. 一种光网络单元ONU激活装置，应用于已有系统中的第一光线路终端OLT侧，所述装置包括：
    第一信息获取模块，用于通过专用激活波长DAW通道激活新系统ONU并获取所述新系统ONU的激活信息；以及
    激活信息发送模块，用于将所述新系统ONU的激活信息发送给新系统中的第二OLT。
  27. 一种光网络单元ONU激活装置，应用于新系统中的第二光线路终端OLT侧，所述装置包括：
    第二信息获取模块，用于获取新系统ONU在已有系统中的第一OLT上进行激活的激活信息，其中，在所述新系统ONU通过专用激活波长DAW通道到所述第一OLT上激活的过程中产生所述激活信息；以及
    ONU激活模块，用于根据所述激活信息对所述新系统ONU进行激活。
  28. 一种光网络单元ONU控制装置，包括：
    第一激活控制模块，用于在新系统中的第二光线路终端OLT上进行激活；
    激活信息获取模块，用于获取新系统ONU在已有系统中的第一OLT上进行激活所产生的激活信息；以及
    激活代理转发模块，用于通过业务通道将所述激活信息发送给所述第二OLT。
  29. 一种光网络单元ONU控制装置，包括：
    第二激活控制模块，用于ONU通过专用激活波长DAW通道在已有系统中的第一光线路终端OLT上进行激活，
    其中，所述ONU为新系统中的ONU。
  30. 一种网络设备，包括处理器、存储器及通信总线，
    所述通信总线用于实现处理器和存储器之间的连接通信，
    所述处理器用于执行存储器中存储的第一光网络单元ONU激活程序，以实现如权利要求1至4中任一项所述的ONU激活方法；或者所述处理器用于执行存储器中存储的第二ONU激活程序，以实现如权利要求5至14中任一项所述的ONU激活方法；或者
    所述处理器用于执行存储器中存储的第三ONU激活程序，以实现如权利要求15至20中任一项所述的ONU激活方法；或者
    所述处理器用于执行存储器中存储的第四ONU激活程序，以实现如权利要求21至25中任一项所述的ONU激活方法。
  31. 一种无源光网络PON系统，包括已有系统与新系统，所述已有系统中包括第一光线路终端OLT，所述新系统中包括第二OLT与多个光网络单元ONU，
    所述第一OLT为如权利要求30所述的处理器执行所述第一ONU激活程序的网络设备，
    所述第二OLT为如权利要求30所述的处理器执行所述第二ONU激活程序的网络设备，
    所述多个ONU中的部分为如权利要求30所述的处理器执行所述第三ONU激活程序的网络设备，并且
    所述多个ONU中的另一部分为如权利要求30所述的处理器执行所述第四ONU激活程序的网络设备。
  32. 一种存储介质，其上存储有第一ONU激活程序、第二ONU激活程序、第三ONU激活程序以及第四ONU激活程序中的至少一个，
    所述第一ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现如权利要求1至4中任一项所述的ONU激活方法，
    所述第二ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现如权利要求5至14中任一项所述的ONU激活方法，
    所述第三ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现如权利要求15至20中任一项所述的ONU激活方法，
    所述第四ONU激活程序被一个或者多个处理器执行时，使得所述一个或者多个处理器实现如权利要求21至25中任一项所述的ONU激活方法。
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