WO2021179846A1 - 注册方法和设备、写入注册信息方法、光线路终端及光网络单元 - Google Patents

注册方法和设备、写入注册信息方法、光线路终端及光网络单元 Download PDF

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WO2021179846A1
WO2021179846A1 PCT/CN2021/074664 CN2021074664W WO2021179846A1 WO 2021179846 A1 WO2021179846 A1 WO 2021179846A1 CN 2021074664 W CN2021074664 W CN 2021074664W WO 2021179846 A1 WO2021179846 A1 WO 2021179846A1
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Prior art keywords
registration
information
optical network
network unit
registered
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PCT/CN2021/074664
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English (en)
French (fr)
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贺江艳
张伟良
袁立权
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中兴通讯股份有限公司
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Priority to US17/909,632 priority Critical patent/US20230144582A1/en
Priority to EP21767226.0A priority patent/EP4117301A4/en
Publication of WO2021179846A1 publication Critical patent/WO2021179846A1/zh

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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
    • 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
    • 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
    • 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

Definitions

  • the embodiments of the present disclosure relate to the technical field of passive optical network, such as a method for registering an optical network unit, a method for writing registration information, an optical line terminal, an optical network unit, a front optical network unit, and a registration device.
  • Passive Optical Network is a point-to-multipoint network topology. It usually consists of an optical line terminal (OLT) at the central office and multiple optical network units (Optical Network Units) at the user end. Network Unit, ONU) and an optical distribution network (Optical Distribution Network, ODN) located between the two.
  • OLT optical line terminal
  • ONU optical network Unit
  • ODN optical distribution network
  • the optical network unit When a new optical network unit needs to be connected to the passive optical network, or when the optical network unit goes offline and then comes back online, the optical network unit needs to be registered first, but this registration process may cause additional delay.
  • the embodiments of the present disclosure provide a method for registering an optical network unit, a method for writing registration information, an optical line terminal, an optical network unit, a front optical network unit, and a registration device.
  • the embodiments of the present disclosure provide a method for registering an optical network unit for an optical line terminal, and the method includes:
  • the registration configuration information is issued to complete the registration of the optical network unit to be registered; wherein the registration information of the optical network unit to be registered is obtained before the start of this registration.
  • the process of obtaining the registration information of the optical network unit to be registered in advance includes:
  • the registration information of the optical network unit to be registered is acquired.
  • the process of obtaining the registration information of the optical network unit to be registered in advance includes:
  • the method before the modification of the registration information of the front optical network unit is the registration information of the optical network unit to be registered, the method further includes:
  • the registration of the front optical network unit is completed, and the registration information of the front optical network unit is acquired during the registration process.
  • the completing the registration of the front-end optical network unit includes receiving at least one response message sent by the front-end optical network unit; wherein the response information is received through a registration channel different from the service channel.
  • the registration information includes at least one of the following:
  • the identity of the optical network unit includes the serial number of the optical network unit, or the MAC address of the optical network unit;
  • the equalization delay of the optical network unit is the equalization delay of the optical network unit.
  • the registration configuration information includes at least one of the following:
  • the logical identification of the optical network unit to be registered includes the ONU-ID of the optical network unit to be registered, or the logical link identification of the optical network unit to be registered;
  • the authorized bandwidth allocated to the optical network unit to be registered.
  • the issuance of the registration configuration information it further includes:
  • the issuance of the registration configuration information it further includes:
  • the issuing registration configuration information includes:
  • the issuing registration configuration information includes:
  • the registration configuration information is issued.
  • the trigger condition includes at least one of the following:
  • the embodiments of the present disclosure provide a method for registering an optical network unit for the optical network unit, and the method includes:
  • the registration configuration information issued by the optical line terminal is received, and the registration is started; wherein, the registration configuration information is issued by the optical line terminal according to the registration information of the optical network unit to be registered acquired in advance, and the optical network to be registered The registration information of the unit was obtained before the start of this registration;
  • the method further includes:
  • the method before the receiving the registration configuration information issued by the optical line terminal, the method further includes:
  • the embodiments of the present disclosure provide a method for writing registration information, which is used for a front-mounted optical network unit, and the method includes:
  • the optical line terminal is triggered to modify the registration information of the front optical network unit as the registration information of the optical network unit to be registered.
  • the completing registration includes sending at least one response message to the optical line terminal;
  • the response information is sent through a registration channel different from the service channel.
  • an optical line terminal which includes:
  • a memory having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the optical line terminal realizes any one of the foregoing optical network unit registration methods;
  • One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • an optical network unit which includes:
  • a memory having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the optical network unit realizes any one of the foregoing optical network unit registration methods;
  • One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • a front-end optical network unit which includes:
  • One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • embodiments of the present disclosure provide a registration device for connecting to an optical line terminal, and the registration device includes:
  • the registration module is configured to complete the registration, so that the optical line terminal can obtain the registration information of the registered device; wherein the response information uploaded to the optical line terminal during the completion of the registration process is sent through a registration channel different from the service channel;
  • the receiving module is configured to receive modification information corresponding to the optical network unit to be registered
  • the modification module is configured to trigger the optical line terminal to modify the registration information of the registered device as the registration information of the optical network unit to be registered according to the modification information.
  • the optical line terminal before the specific registration steps are started, the optical line terminal has obtained the registration information for the optical network unit to be registered in advance, so that during the registration process, the optical line terminal can directly report the registration information based on the pre-acquired registration information.
  • the optical network unit to be registered issues registration configuration information without receiving information from the optical network unit to be registered. That is to say, in the embodiment of the present disclosure, only the optical line terminal "sends information" during the registration process, and there is no conflict in the information sent, so there is no need to open a quiet window during the registration process, which avoids opening windows. The impact on the system greatly reduces the time delay of business information.
  • the total amount of information transferred during the registration process in the embodiments of the present disclosure is also reduced. For example, there is no need to transmit identity request messages, ranging request messages, ranging response messages, etc., so even if the quiet window is not considered, the registration process itself The time consuming and the amount of information are also less.
  • the embodiments of the present disclosure can realize rapid registration of optical network units, reduce the delay of service information, and meet the stringent requirements for transmission delays such as mobile fronthaul, mobile backhaul, high-definition video services, and augmented reality (AR) services.
  • Business requirements such as mobile fronthaul, mobile backhaul, high-definition video services, and augmented reality (AR) services.
  • FIG. 1 is a schematic block diagram of the composition of a passive optical network provided by an embodiment of the disclosure
  • FIG. 2 is a signaling diagram of a method for registering a network element according to an embodiment of the disclosure
  • FIG. 3 is a flowchart of a method for registering an optical network unit according to an embodiment of the disclosure
  • FIG. 4 is a signaling diagram of a method for registering an optical network unit according to an embodiment of the disclosure
  • FIG. 5 is a flowchart of another method for registering an optical network unit according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart of some steps in another method for registering an optical network unit provided by an embodiment of the disclosure
  • FIG. 7 is a flowchart of some steps in another method for registering an optical network unit provided by an embodiment of the disclosure.
  • FIG. 8 is a schematic block diagram of the composition of another passive optical network provided by an embodiment of the present disclosure.
  • FIG. 9 is a flowchart of another method for registering an optical network unit according to an embodiment of the disclosure.
  • FIG. 10 is a flowchart of another method for registering an optical network unit according to an embodiment of the disclosure.
  • FIG. 11 is a flowchart of a method for writing registration information provided by an embodiment of the disclosure.
  • FIG. 12 is a block diagram of the composition of an optical line terminal provided by an embodiment of the disclosure.
  • FIG. 13 is a block diagram of an optical network unit provided by an embodiment of the disclosure.
  • FIG. 14 is a block diagram of a front optical network unit provided by an embodiment of the disclosure.
  • FIG. 15 is a block diagram of a registration device provided by an embodiment of the disclosure.
  • registration means that after the optical network unit (ONU) establishes a physical connection with the optical line terminal (OLT) (that is, connects to the branch fiber), through information exchange, both the ONU and the OLT obtain the required information, so that the ONU can be
  • OLT effectively manages and controls, enters the working state, and realizes the interaction of business information with the OLT.
  • registration information refers to the information that the OLT needs to use during the registration process, which can be obtained through interaction with the ONU, or calculated based on the information obtained through the interaction with the ONU.
  • registration configuration information refers to the information that the ONU needs to obtain during the registration process, and the ONU needs to configure its own state according to the registration configuration information to complete the registration process.
  • the registration configuration information may be a part of the registration information, or it may be calculated based on the registration information.
  • a passive optical network may include an OLT at a central office.
  • the OLT is connected to a plurality of branch fibers through an optical splitter, and each branch fiber can be connected to an ONU at the user end.
  • some ONUs are connected to the OLT through only one uplink and downlink channel. This channel is also called “service channel” and is used to transmit service information. These ONUs are called the first ONU (ONU1 in the figure), or non-low latency ONUs. .
  • the above service channel may specifically include an upstream channel ( ⁇ XGS-PONu ) and a downstream channel ( ⁇ XGS-PONd ) of a 10-Gigabit-Capable Symmetric Passive Optical Network (10-Gigabit-Capable Symmetric PON, XGS-PON).
  • ⁇ XGS-PONu upstream channel
  • ⁇ XGS-PONd downstream channel
  • 10-Gigabit-Capable Symmetric Passive Optical Network 10-Gigabit-Capable Symmetric PON, XGS-PON.
  • each ONU works according to the authorized bandwidth configured by the OLT, so the upstream information of different ONUs must not interfere with each other.
  • the upstream information sent during the registration process may conflict with the upstream information of other ONUs, resulting in information loss and errors.
  • the OLT needs to open a silent window in the service channel and suspend the upstream information of other ONUs.
  • this will cause serious delays in the transmission of service information, and even cannot meet the mobile requirements.
  • Fronthaul, mobile backhaul, high-definition video services, augmented reality (AR) services and other services that require very strict transmission delay requirements.
  • the OLT periodically opens a quiet window on the service channel and broadcasts an identity request message.
  • the first ONU If a first ONU has connected (established a physical connection) to the passive optical network but has not yet registered, the first ONU sends an identity including its own identity to the OLT after receiving the identity request message Response message.
  • the ONU identity is the only sign used to distinguish different ONU devices, and its specific form can be different according to the different forms of the passive optical network.
  • the identity can be the serial number (Serial Number, SN); and for the ONU of the Ethernet Passive Optical Network (EPON) series, the identity can be the media connection. Media Access Control (MAC) address.
  • MAC Media Access Control
  • the first ONU may be accessed and registered for the first time; it may also be offline after previous registration, and then re-accessed and re-registered.
  • the OLT receives the identity identification response message and closes the quiet window, determines that there is currently a first ONU that needs to be registered, completes "discovery" of the ONU, and issues a logical identification to the first ONU.
  • the logical identifier is a unique identifier that is assigned by the OLT to the ONU and plays a role in identifying the ONU in the passive optical network, and its specific form can be different according to the different forms of the passive optical network.
  • the logical identifier of the ONU may be the ONU ID;
  • the logical identifier of the ONU may be a logical link identifier (LLID) calculated according to the MAC address.
  • LLID logical link identifier
  • the information delivered by the OLT to the first ONU is essentially unicast instead of broadcast.
  • the OLT opens a quiet window on the service channel again, and sends a ranging request message to the first ONU.
  • the first ONU After receiving the ranging request message, the first ONU sends a ranging response message to the OLT.
  • the OLT receives the ranging response message and closes the quiet window. Then, according to the time difference between the ranging request message and the ranging response message, the round-trip time (RTT) can be calculated, and combined with the wavelength of the service channel, The equalization delay (Eqd) of the OLT relative to the first ONU can be calculated, the "ranging" is completed, and the equalization delay can be issued to the first ONU.
  • RTT round-trip time
  • Eqd equalization delay
  • equalization delay is a parameter indicating the time required for information to be transmitted between the OLT and the corresponding ONU, which is essentially determined by the equivalent distance or logical distance between the OLT and the corresponding ONU. It should be understood that the specific parameter form of the equalization delay can be various, as long as a certain parameter (or information) can substantially represent the above content, the parameter (or information) is called “equalization delay”.
  • the OLT calculates the authorized bandwidth allocated to the first ONU according to the equalization delay, and issues the authorized bandwidth to the first ONU.
  • the first ONU configures its own state according to the received logical identification, equalization delay, and authorized bandwidth, completes registration, and can start sending service information to the OLT according to the authorized bandwidth.
  • registration information such as ONU identity identification, equalization delay, logical identification, authorized bandwidth, etc.
  • part of the content may not belong to registration information, such as Logical identification, authorized bandwidth.
  • the information sent by the OLT to the ONU for the ONU to configure is registration configuration information
  • the registration configuration information may specifically include logical identification, equalization delay, authorized bandwidth, and so on.
  • the registration configuration information may be a part of the registration information, or it may be calculated based on the registration information.
  • the authorized bandwidth may be calculated based on the equalization delay.
  • the specific content of the registration configuration information may be different.
  • the equalization delay may not be sent to the ONU, so it does not belong to the registration configuration information.
  • the second ONU is also connected to the OLT through another registration channel.
  • the communication wavelength used in the registration channel is the third wavelength, which is different from the communication wavelength used in the service channel.
  • the above registered channels include an upstream channel ( ⁇ PONu ) and a downstream channel ( ⁇ PONd ) of a gigabit-capable symmetric passive optical network (Gigabit-Capable Symmetric PON, GPON).
  • ⁇ PONu upstream channel
  • ⁇ PONd downstream channel
  • GPON gigabit-Capable Symmetric PON
  • the second ONU that supports third-wavelength communication, its registration-related information can be transmitted in the registration channel (third-wavelength channel), so that the registration process has no impact on service information.
  • the specific process of registering in the registration channel may correspond to the specific process of registering in the service channel by the first ONU (only the channel is different), which will not be described in detail here.
  • ONUs that support third-wavelength communication will not cause service information delay during registration, many ONUs that already exist in the existing network do not support third-wavelength communication, or non-low-latency ONUs (first ONU). ), and these ONUs still have delay problems.
  • the registration process still needs to open a quiet window in the registration channel, but with the development of technology, the registration channel may also need to be used to transmit other useful information, and the transmission of this information is also There will be a large time delay due to the existence of the quiet window.
  • an embodiment of the present disclosure provides a method for ONU registration.
  • the method of the embodiment of the present disclosure is used for execution by the OLT to complete the registration of the ONU.
  • the method of the embodiment of the present disclosure includes:
  • S101 According to the registration information of the ONU to be registered obtained in advance, issue registration configuration information to complete the registration of the ONU to be registered.
  • the registration information of the ONU to be registered is obtained before the start of this registration.
  • the OLT Before the start of this registration, the OLT has obtained the registration information for the ONU to be registered in advance (and can save it) through some methods (specific methods are described later), and can store the registration information. Therefore, when the registration process starts this time, the OLT can directly use the registration information it has already obtained to obtain the registration configuration information and deliver it (such as broadcast delivery) without obtaining information (registration information) from the ONU to be registered. For the ONU to be registered, the ONU to be registered can be configured to complete the registration process.
  • the registration information may be related to the access location (such as a branch fiber)
  • the ONU to be registered should be connected to the location corresponding to its registration information.
  • the registration information of the ONU to be registered needs to have been obtained before performing this step (S101), it does not mean that the step of obtaining the registration information of the ONU to be registered must be performed each time this step is performed, that is, in the OLT After the registration information of the ONU to be registered is obtained, the registration information can be subsequently used multiple times to perform this step S101 (ie, perform registration).
  • the specific content of the issued registration configuration information can have multiple items (such as logical identification, equalization delay, authorized bandwidth, etc.). These content can be carried in a piece of information and issued at one time, or it can be divided into multiple categories with reference to Figure 4. Issued this time.
  • the forms of ONUs to be registered in the embodiments of the present disclosure may be different.
  • the ONU to be registered may be an ONU that has been registered before, but then goes offline and then “re-connects” to it.
  • the ONU to be registered may be a "new" access ONU that has not been registered before.
  • a branch fiber may have been connected to a certain ONU, and then "replaced" with the ONU to be registered (the ONU to be registered is also new at this time).
  • the OLT before the specific registration steps are started, the OLT has obtained the registration information for the ONU to be registered in advance, so during the registration process, the OLT can directly issue the registration configuration to the ONU to be registered according to the registration information obtained in advance. Information without the need to receive information from the ONU to be registered. That is to say, in the embodiment of the present disclosure, only the OLT "issues information" during the registration process, and there is no conflict in the information issued, so there is no need to open a quiet window during the registration process, which avoids opening the window to the system. The impact caused greatly reduces the time delay of business information.
  • the total amount of information transferred during the registration process in the embodiments of the present disclosure is also reduced. For example, there is no need to transmit identity request messages, ranging request messages, ranging response messages, etc., so even if the quiet window is not considered, the registration process itself The time consuming and the amount of information are also less.
  • the embodiments of the present disclosure can realize the rapid registration of ONUs, reduce the delay of service information, and meet the requirements of mobile fronthaul, mobile backhaul, high-definition video services, augmented reality (AR) services and other services with strict requirements on transmission delay. Require.
  • AR augmented reality
  • the registration information includes at least one of the following:
  • the identity of the ONU includes the serial number of the ONU, or the MAC address of the ONU;
  • the equalization delay of the ONU is the equalization delay of the ONU.
  • the OLT needs to obtain at least the identity of the ONU and the equalization delay (Equalization Delay, Eqd), that is, the registration information must include the correspondence between the "identity identifier and the equalization delay".
  • the identity can be the above serial number (SN) or MAC address, etc.
  • the registration configuration information includes at least one of the following:
  • the logical identification of the ONU to be registered includes the ONU-ID of the ONU to be registered, or the logical link identification of the ONU to be registered;
  • the authorized bandwidth allocated to the ONU to be registered.
  • the information sent by the OLT to the ONU to be registered should at least include the logical identifier and authorized bandwidth allocated to the ONU to be registered.
  • the authorized bandwidth can be calculated based on the equalization delay (also determined by other means); at the same time, In some passive optical networks, the equalization delay can also be sent to the ONU to be registered as registration configuration information.
  • the identification can be the above serial number ONU-ID or logical link identification (LLID), etc.
  • the authorized bandwidth in the embodiment of the present disclosure is obtained based on the pre-stored equalization delay, not based on the equalization delay of the real-time test, so it may have certain errors (for example, due to changes in the overall condition of the passive optical network) The resulting error). Therefore, before and after the authorized bandwidth allocated in the embodiments of the present disclosure, it should be unused time, that is, have a larger guard interval, to ensure that the OLT can still receive in the guard interval when there is an error in the authorized bandwidth.
  • the business information of the ONU to be registered to avoid business information conflicts.
  • the specific content and form of the registration information and registration configuration information can be adjusted as needed. For example, if the equalization delay is not sent to the ONU to be registered, it does not belong to registration information. For another example, the logical identification, authorized bandwidth, etc., may not belong to the registration information (so calculated before each issuance), but can also be directly included in the registration information (therefore, it is extracted from the registration information before each issuance).
  • issuing registration configuration information includes: periodically issuing registration configuration information.
  • the registration configuration information can be issued periodically and repeatedly, that is, after obtaining the registration information of the ONU to be registered, as long as the ONU to be registered has not yet started to register (for example, it is found that the ONU to be registered is offline) ), the registration configuration information can be issued every predetermined time to "try" to allow the ONU to be registered to complete the registration.
  • the ONU to be registered does not need to send any information before obtaining the authorized bandwidth, and will not affect the transmission of service information.
  • issuing registration configuration information includes: when a trigger condition is met, issuing registration configuration information.
  • the trigger condition includes at least one of the following:
  • the ONU to be registered has been accessed through certain conditions, thereby triggering the issuance of the registration configuration information (that is, triggering the registration process).
  • the ONU to be registered may actively send trigger information to the OLT when it needs to be registered (such as when accessing or receiving a user's command), so that the OLT starts to issue the registration configuration after receiving the trigger information information.
  • the above trigger information can be a short message, so that it has a low probability of conflict with the service information uploaded by other ONUs; and even when the short message conflicts with the service information, although the service information will cause an error, the error is usually unacceptable. Corrected. Therefore, when the OLT finds that there is an error in the received service information and the error can be corrected, the OLT considers that the ONU to be registered actually sent the trigger information, so it starts to issue the registration configuration information (that is, the registration process starts).
  • the OLT only issues registration configuration information when the ONU to be registered does need to be registered, which will not generate useless information transmission, which can reduce the occupation of the downstream channel.
  • the ONU can complete the registration after receiving the registration configuration information, and can upload service information within the authorized bandwidth.
  • the OLT only issues information and does not receive information from the ONU to be registered, so the OLT cannot determine whether the ONU to be registered has received the registration configuration information and completes the registration. Therefore, referring to FIG. 5, the ONU to be registered can feed back online response information to the OLT in the authorized bandwidth configured for it after receiving the registration configuration information and completing the registration.
  • the OLT will only determine that the registration of the ONU to be registered has been completed after receiving the online response information; conversely, if the OLT does not receive the online response information within the predetermined time after registering the configuration information, it can be considered as pending registration
  • the ONU fails to complete the registration (such as not connected, not powered on, etc.), and it needs to issue the registration configuration information again at a suitable opportunity.
  • the specific form of the online response message can be diverse.
  • the online response information can be implemented using the existing Acknowledge message, as shown in the following table, where ONU-ID is the logical identifier assigned to the ONU to be registered, SeqNo is 0, and Completion code is 0.
  • the online response information can also use other forms of messages.
  • the ONU to be registered must receive the registration configuration information and complete the registration, so there is no need to go online response information.
  • the OLT only needs to send the registration configuration After the information, wait for the service information of the ONU to be registered.
  • S104 Adjust the equalization delay in the registration information of the ONU to be registered according to the authorized bandwidth of the service information and the registration configuration information.
  • the ONU to be registered can start to send service information to the OLT according to the authorized bandwidth allocated to it.
  • the authorized bandwidth in the embodiment of the present disclosure is obtained based on the pre-stored equalization delay, rather than the equalization delay of the real-time test, there may be a certain error (for example, due to the passive optical network's Errors caused by changes in the overall situation).
  • the equalization delay can be re-determined according to the time when the service information is received, etc., and the equalization delay in the obtained service information can be adjusted (or updated) to ensure the equalization The accuracy of the delay, so as to "correct" the authorized bandwidth in the follow-up (the next registration).
  • the process of obtaining the registration information of the ONU to be registered in advance includes:
  • the method of the embodiment of the present disclosure may further include the step of acquiring the registration information of the registered ONU.
  • the above steps are specifically that, before the start of this registration process (S101), during other registration processes of the ONU to be registered, the OLT obtains the registration information of the ONU to be registered and saves it.
  • the above steps can also be that the ONU to be registered was in the working state before the start of this registration process (S101), so that the OLT obtains the registration information of the ONU to be registered in the working state and saves it (as above Modification of the saved equalization delay).
  • the ONU to be registered at the beginning must be in a state of not starting registration, that is, after the ONU to be registered is registered (or working) and the OLT obtains the registration information, it should go offline. Before you can start this registration process.
  • the registration of the ONU to be registered above may be its first registration or re-registration.
  • the registration of the ONU to be registered above may be in a manner of related technology, or may also be in the manner of step S101 in the embodiment of the present disclosure.
  • the ONU to be registered here may be a low-latency ONU (second ONU) that supports third-wavelength communication, or a non-low-latency ONU (first ONU) that does not support third-wavelength communication.
  • the process of obtaining the registration information of the ONU to be registered in advance includes:
  • the method of the embodiment of the present disclosure may further include the step of acquiring the registration information of the registered ONU.
  • the above steps can also be that before the registration process (S101) starts, the registration information for another ONU (pre-ONU) already exists in the OLT, and the previous The registration information of the ONU is modified, and the registration information of the ONU to be registered can also be obtained.
  • the above front ONU is an ONU different from the ONU to be registered, and it is connected to a specific location (such as a specific branch fiber) to which the ONU to be registered should be connected.
  • the front-end ONU may be a physical device that actually exists and has been connected to a passive optical network; or, the front-end ONU may not be a physical device, or it may not have been connected to a passive optical network, but as long as the OLT can obtain the relevant information in advance. Just set the registration information of the ONU.
  • the above modification mainly refers to modifying the identity of the pre-ONU in the registration information of the pre-ONU to the identity of the ONU to be registered, or in other words, modifying the corresponding relationship of "identity-equal delay";
  • the registration information of the front ONU becomes the registration information of the ONU to be registered.
  • the network manager may send modification information to the OLT through a special operation to modify the registration information of the pre-ONU stored therein.
  • the front-end ONU itself sends modification information to the OLT to modify the registration information of the front-end ONU stored therein.
  • the method before modifying the registration information of the front ONU to the registration information of the ONU to be registered (S1003), the method further includes:
  • the front ONU before modifying the registration information of the front ONU, the front ONU can be actually connected to the passive optical network and registration is completed, so that the OLT can obtain the registration information for the front ONU during the registration process, and use it for subsequent use. Modifications.
  • the registration information of the previous ONU in the OLT can be modified in advance, so that the replaced ONU is the front ONU, and the replaced new ONU is the ONU to be registered.
  • the branch fiber may have two ports, which are respectively connected to the front ONU and the ONU to be registered).
  • the above method is equivalent to using the front ONU to enable the OLT to obtain the registration information of the ONU to be registered in advance, and then actually access the ONU to be registered.
  • completing the registration of the pre-ONU includes receiving at least one response message sent by the pre-ONU; wherein the response information is received through a registration channel different from the service channel.
  • the registration of ONUs can include information interaction between the OLT and ONUs (for example, the registration methods in related technologies).
  • the pre-ONU can support The low-latency ONU (second ONU) for third-wavelength communication, and during the registration process, at least the uplink information is transmitted through the service channel (so there is no need to open a quiet window on the service channel).
  • the ONU to be registered When the registration configuration information of the ONU to be registered is issued in the subsequent process, it can still be issued through the service channel, that is, the ONU to be registered may be a non-low-latency ONU (first ONU) that does not support third-wavelength communication.
  • the above method can be: when the non-low-latency ONU (first ONU) is to be registered, the low-latency ONU (second ONU) can be used as the front ONU to avoid the non-low-latency ONU in accordance with the relevant Registration is done in a technical way to minimize the delay of business information.
  • the transmission channel of the downlink information during the registration process is The disclosed embodiments are not limited.
  • the following is an exemplary description of how to use low-latency ONUs (ONUs supporting third-wavelength communication, second ONUs) as front-end ONUs to obtain registration information of the ONU to be registered in advance.
  • the passive optical network structure can refer to Figure 1, including multiple ONUs connected to the OLT. Some of these ONUs are low-latency ONUs, that is, each ONU2 in the figure, and the other part are non-low-latency ONUs (not supporting the first Three-wavelength communication ONU, the first ONU), that is, each ONU1 in the figure.
  • the service channel is an XGS-PON uplink and downlink channel
  • the registered channel of the second ONU is a GPON uplink and downlink channel.
  • the above process may include:
  • the OLT opens a quiet window on the GPON channel, and broadcasts an identity request message through the GPON downstream channel.
  • the OLT receives the identity response message sent by the second ONU through the GPON upstream channel and closes the quiet window, so as to obtain the serial number (SN) of the second ONU carried in the identity response message, and obtain the sequence number (SN) to be allocated to The ONU ID of the second ONU.
  • the OLT opens a quiet window on the GPON upstream channel again, and sends a ranging request message to the second ONU through the GPON downstream channel.
  • the OLT receives the ranging response message sent by the second ONU on the GPON upstream channel, calculates the equalization delay (Eqd), and obtains the registration information of the second ONU (front ONU).
  • the OLT allocates the ONU ID and authorized bandwidth to the second ONU through the GPON downstream channel.
  • the equalization delay can also be allocated to the second ONU through the GPON downstream channel to complete the second ONU. register.
  • the OLT receives the modification information (which can be from the network management or from the second ONU), and according to the modification information, modifies the serial number in the registration information of the second ONU (pre-ONU) to the first ONU to be replaced (ONU to be registered) ) To obtain the registration information of the ONU to be registered in advance.
  • the registration process of the above second ONU (front ONU) is completely performed in the registration channel, so it will not affect business information; and even if the ONU to be registered is the first ONU, the registration process of the ONU to be registered only includes information "Delivery", so there is also no need to open a quiet window. In other words, during the entire registration process, the business channel does not need to open a quiet window, and will not affect the delivery of business information at all.
  • the registration channel of the second ONU used above may only include the upstream channel, but not the downstream channel.
  • the second ONU may only support the upstream channel of XGS-PON ( ⁇ XGS- PONu ) and downstream channels ( ⁇ XGS-PONd ), and GPON upstream channels ( ⁇ PONu ).
  • the information (identity response message, ranging response message) uploaded to the OLT by all the second ONUs is still received by the OLT after the registration channel opens the quiet window; And all the information (identity request message, ranging request message, registration configuration information) issued by the OLT to the second ONU is issued through the service channel.
  • the identity request message is sent through the service channel broadcast, so if there is an unregistered first ONU, it may "misunderstand"
  • the identity request message is issued for itself, so that the identity response message is erroneously fed back in the service channel, which conflicts with the service information of other ONUs.
  • the format of the identity request message in the registration channel needs to be modified to distinguish between the identity request message for the second ONU and the identity request message for the first ONU, so that the first ONU does not make mistakes. Respond to the identity request message for the second ONU.
  • the specific ways of distinguishing different identity identification request messages are various, and will not be described in detail here.
  • the embodiments of the present disclosure provide a method for ONU registration, which is used for ONUs.
  • the method in the embodiment of the present disclosure is used for the ONU (that is, the ONU to be registered) to implement the above registration process.
  • the method of the embodiment of the present disclosure includes:
  • S201 Receive registration configuration information issued by the OLT, and start registration.
  • the registration configuration information is issued by the OLT according to the registration information of the ONU to be registered acquired in advance, and the registration information of the ONU to be registered is acquired before the start of this registration.
  • the ONU After the ONU is connected, if the OLT has obtained the registration information for the ONU in advance, the ONU is the ONU to be registered. Therefore, the ONU will directly receive the registration configuration information issued by the OLT and start to register.
  • start registration means that the ONU only starts its own registration process after receiving the registration configuration information, and the steps of sending an identity response message and sending a ranging response message have not been performed before).
  • the ONU After the ONU receives the registration configuration information for itself, it can configure itself according to the content of the registration configuration information (such as authorized bandwidth, logical identification, etc.), so that it can complete the registration, enter the working state, and start uploading service information.
  • the content of the registration configuration information such as authorized bandwidth, logical identification, etc.
  • the method further includes:
  • S203 Send online response information to the OLT.
  • the ONU can send an online response message to the OLT in the authorized bandwidth to notify the OLT that its registration is complete.
  • the method before receiving the registration configuration information (S201) issued by the OLT, the method further includes:
  • the ONU when it needs to register (such as when accessing or receiving a user's command), it can send an online response message (such as a short message) to the OLT to notify the OLT to start sending registration configuration information.
  • an online response message such as a short message
  • the embodiments of the present disclosure provide a method for writing registration information, which is used for the front-end ONU.
  • the method of the embodiment of the present disclosure is used for the above front-end ONU to register, and the registration information of the front-end ONU in the OLT is modified to obtain the registration information of the ONU to be registered.
  • the method of the embodiment of the present disclosure includes:
  • the front-end ONU completes registration after accessing the passive optical network, which can be specifically implemented in a related technical manner, or in a manner in step S101 of the embodiment of the present disclosure, which will not be described in detail here.
  • the OLT obtains the registration information of the front ONU for the front ONU.
  • the front ONU's identity is SN A
  • the equalization delay is Eqd1
  • the registration information of the front ONU obtained by the OLT includes Correspondence of "SN A-Eqd1".
  • S302 Receive modification information corresponding to the ONU to be registered.
  • the front-end ONU receives the modification information on how to modify it.
  • the modification information may be input by the user, which may include the identity of the ONU to be registered, such as SN B.
  • the front-end ONU can issue an instruction to the OLT based on the above modification information (such as SN B) so that the OLT can modify the registration information of the front-end ONU to obtain the registration information of the ONU to be registered. For example, it can be the registration of the front-end ONU.
  • modification information such as SN B
  • SN A-Eqd1 The corresponding relationship of "SN A-Eqd1" in the information is modified to "SN B-Eqd1".
  • step S302 and step S303 may not have an inevitable sequence relationship, as long as both are completed before step S303 is performed.
  • the OLT has already obtained the registration information of the ONU to be registered at this time, so when the ONU to be registered accesses and registers, it is not necessary to open a quiet window, which can reduce the time delay.
  • the front-end ONU becomes "unregistered" for the OLT, so the front-end ONU should no longer transmit service data at this time.
  • the front ONU is removed from the branch fiber and replaced with the ONU to be registered. If the branch fiber has two ports, the front ONU can also be reserved, and the ONU to be registered is connected to another port at the same time.
  • completing the registration includes receiving at least one request message issued by the OLT and sending at least one response message to the OLT; the response message is sent through a registration channel different from the service channel.
  • the front-end ONU may be a low-latency ONU (ONU supporting third-wavelength communication, second ONU), so that the registration process will not cause service information delay.
  • the ONU to be registered is a non-low-latency ONU (ONU that does not support third-wavelength communication, the first ONU), it is equivalent to "borrowing" a low-latency front ONU to write a non-low-latency ONU
  • the registration information of the ONU to be registered to ensure that the non-low-latency ONU to be registered does not cause any delay to the service information even when it registers for the first time.
  • an embodiment of the present disclosure provides an OLT, which includes:
  • a memory which stores one or more programs, when one or more programs are executed by one or more processors, so that the OLT realizes any one of the above-mentioned ONU registration methods
  • One or more input/output (Input/Output, I/O) interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • an embodiment of the present disclosure provides an ONU, which includes:
  • One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • an embodiment of the present disclosure provides a front-end ONU, which includes:
  • One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
  • an embodiment of the present disclosure provides a registration device for connecting to an OLT, and the registration device includes:
  • the registration module is configured to complete the registration so that the OLT can obtain the registration information of the registered device; among them, the response information uploaded to the OLT during the completion of the registration process is sent through a registration channel different from the service channel;
  • the receiving module is configured to receive modification information corresponding to the ONU to be registered
  • the modification module is configured to trigger the OLT to modify the registration information of the registered device as the registration information of the ONU to be registered according to the modification information.
  • the registration device of the embodiment of the present disclosure may be a low-latency ONU (but may not have the ability to transmit service information), and the registration device may be pre-connected to a passive ONU to enable the OLT to obtain its registration information in advance during the registration process And, the registration device can also receive the user's modification information to control the OLT to modify the registration information (such as modifying the identity) according to the modification information, and obtain the registration information of the ONU to be registered for subsequent registration of the ONU to be registered.
  • the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a 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 (CPU), digital signal processor, or microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as Application specific integrated circuit.
  • a processor such as a central processing unit (CPU), digital signal processor, or microprocessor
  • Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • the term 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). Sexual, removable and non-removable media.
  • Computer storage media include, but are not limited to, Random Access Memory (RAM), more specifically, such as Synchronous Dynamic Random Access Memory (SDRAM), and Double Data Rate (Double Data Rate). DDR), etc., read only memory (Read Only Memory, ROM), electrically erasable programmable read only memory (Electrically Erasable Programmable Read Only Memory, EEPROM), flash memory (FLASH) or other disk storage; CD-ROM (Compact Disc Read) Only Memory, CD-ROM), Digital Video Disk (DVD) or other optical disk storage; magnetic cassettes, tapes, disk storage or other magnetic storage; any that can be used to store desired information and can be accessed by a computer Other media.
  • RAM Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • EEPROM Electrically erasable programmable read only memory
  • FLASH or other disk storage
  • CD-ROM Compact Disc Read
  • CD-ROM Compact Disc Read Only Memory
  • DVD Digital Video Disk
  • a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .

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Abstract

本公开实施例提供了一种光网络单元注册的方法，该方法用于光线路终端，光网络单元注册的方法包括：根据提前获取的待注册光网络单元的注册信息，下发注册配置信息，完成待注册光网络单元的注册；其中，所述待注册光网络单元的注册信息是在本次注册开始之前获取的。本公开实施例还提供了一种写入注册信息的方法、光线路终端、光网络单元、前置光网络单元和注册设备。

Description

注册方法和设备、写入注册信息方法、光线路终端及光网络单元
本申请要求在2020年03月07日提交中国专利局、申请号为202010154280.7的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本公开实施例涉及无源光网络技术领域，例如涉及光网络单元注册的方法、写入注册信息的方法、光线路终端、光网络单元、前置光网络单元和注册设备。
背景技术
无源光网络(Passive Optical Network，PON)是一种点对多点的网络拓扑结构，通常由位于中心局的光线路终端(Optical Line Terminal，OLT)、位于用户端的多个光网络单元(Optical Network Unit，ONU)以及位于两者之间的光分配网络(Optical Distribution Network，ODN)组成。
随着通信技术的发展，无源光网络技术由于其低成本、大带宽、长距离、无源化等优良特性，逐渐成为移动前传、移动回传、高清视频业务、增强现实(Augmented Reality，AR)业务等传输时延要求很严格的业务的重要技术之一。
当有新的光网络单元需要接入无源光网络，或者是光网络单元离线后重新上线时，都需要先对光网络单元进行注册，但该注册过程，可能导致额外的时延。
发明内容
本公开实施例提供一种光网络单元注册的方法、写入注册信息的方法、光线路终端、光网络单元、前置光网络单元和注册设备。
第一方面，本公开实施例提供一种光网络单元注册的方法，用于光线路终端，所述方法包括：
根据提前获取的待注册光网络单元的注册信息，下发注册配置信息，完成待注册光网络单元的注册；其中，所述待注册光网络单元的注册信息是在本次注册开始之前获取的。
在一些实施例中，所述提前获取待注册光网络单元的注册信息的过程包括：
在所述待注册光网络单元于本次注册前完成过的注册或工作过程中，获取待注册光网络单元的注册信息。
在一些实施例中，所述提前获取待注册光网络单元的注册信息的过程包括：
修改前置光网络单元的注册信息为待注册光网络单元的注册信息。
在一些实施例中，在所述修改前置光网络单元的注册信息为待注册光网络单元的注册信息前，还包括：
完成前置光网络单元的注册，在所述注册过程中获取所述前置光网络单元的注册信息。
在一些实施例中，所述完成前置光网络单元的注册包括接收前置光网络单元发送的至少一个响应信息；其中，所述响应信息是通过与业务通道不同的注册通道接收的。
在一些实施例中，所述注册信息包括以下至少一项：
光网络单元的身份标识；所述光网络单元的身份标识包括光网络单元的序列号，或，光网络单元的MAC地址；
光网络单元的均衡延时。
在一些实施例中，所述注册配置信息包括以下至少一项：
所述待注册光网络单元的逻辑标识；所述逻辑标识包括所述待注册光网络单元的ONU-ID，或，所述待注册光网络单元的逻辑链路标识；
所述光网络单元的均衡延时；
分配给所述待注册光网络单元的授权带宽。
在一些实施例中，所述授权带宽前后分别具有预设的保护间隔。
在一些实施例中，在所述下发注册配置信息后，还包括：
接收所述待注册光网络单元发送的上线响应信息。
在一些实施例中，在所述下发注册配置信息后，还包括：
接收所述待注册光网络单元发送的业务信息；
根据所述业务信息和所述注册配置信息的授权带宽，调整所述待注册光网络单元的注册信息中的均衡延时。
在一些实施例中，所述下发注册配置信息包括：
周期性的下发注册配置信息。
在一些实施例中，所述下发注册配置信息包括：
当满足触发条件时，下发注册配置信息。
在一些实施例中，所述触发条件包括以下至少一项：
接收到预定的触发信息；
接收到除待注册光网络单元外的光网络单元的业务信息，并在所述业务信息中发现可纠正的错误。
第二方面，本公开实施例提供一种光网络单元注册的方法，用于光网络单元，所述方法包括：
接收光线路终端下发的注册配置信息，开始进行注册；其中，所述注册配置信息是所述光线路终端根据提前获取的待注册光网络单元的注册信息下发的，所述待注册光网络单元的注册信息是在本次注册开始之前获取的；
根据所述注册配置信息进行配置。
在一些实施例中，在所述根据所述注册配置信息进行配置后，还包括：
向所述光线路终端发送上线响应信息。
在一些实施例中，在所述接收光线路终端下发的注册配置信息前，还包括：
向所述光线路终端发送触发信息。
第三方面，本公开实施例提供一种写入注册信息的方法，用于前置光网络单元，所述方法包括：
完成注册，以供所述光线路终端获取前置光网络单元的注册信息；
接收对应待注册光网络单元的修改信息；
根据所述修改信息，触发光线路终端修改前置光网络单元的注册信息为待注册光网络单元的注册信息。
在一些实施例中，所述完成注册包括向光线路终端发送至少一个响应信息；
所述响应信息是通过与业务通道不同的注册通道发送的。
第四方面，本公开实施例提供一种光线路终端，其包括：
存储器，其上存储有一个或多个程序，当所述一个或多个程序被所述一个或多个处理器执行，使得所述光线路终端实现上述任意一种光网络单元注册的方法；
一个或多个I/O接口，连接在所述处理器与存储器之间，配置为实现所述处理器与存储器的信息交互。
第五方面，本公开实施例提供一种光网络单元，其包括：
存储器，其上存储有一个或多个程序，当所述一个或多个程序被所述一个 或多个处理器执行，使得所述光网络单元实现上述任意一种光网络单元注册的方法；
一个或多个I/O接口，连接在所述处理器与存储器之间，配置为实现所述处理器与存储器的信息交互。
第六方面，本公开实施例提供一种前置光网络单元，其包括：
存储器，其上存储有一个或多个程序，当所述一个或多个程序被所述一个或多个处理器执行，使得所述前置光网络单元实现上述任意一种写入注册信息的方法；
一个或多个I/O接口，连接在所述处理器与存储器之间，配置为实现所述处理器与存储器的信息交互。
第七方面，本公开实施例提供一种注册设备，用于连接光线路终端，所述注册设备包括：
注册模块，配置为完成注册，以供所述光线路终端获取注册设备的注册信息；其中，所述完成注册过程中上传给光线路终端的响应信息是通过与业务通道不同的注册通道发送的；
接收模块，配置为接收对应待注册光网络单元的修改信息；
修改模块，配置为根据所述修改信息，触发光线路终端修改注册设备的注册信息为待注册光网络单元的注册信息。
可见，本公开实施例中，在具体注册步骤开始前，光线路终端已经预先获取到了针对待注册光网络单元的注册信息，从而在注册过程中，光线路终端可直接根据预先获取的注册信息向待注册光网络单元下发注册配置信息，而不需要接收来自待注册光网络单元的信息。也就是说，本公开实施例中，注册过程中只要光线路终端“下发信息”即可，而下发信息并不存在冲突问题，故其注册过程中不需要开放安静窗口，避免了开窗对系统造成的影响，大大降低了业务信息的时延。
本公开实施例的注册过程中传递的信息总量也减少了，例如，其中不用传输身份标识请求消息、测距请求消息、测距响应消息等，故即使不考虑安静窗口，其注册过程本身所耗费的时间和信息量也都较少。
由此，本公开实施例可实现光网络单元的快速注册，减少业务信息的时延，满足移动前传、移动回传、高清视频业务、增强现实(AR)业务等对传输时延要求很严格的业务的要求。
附图说明
图1为本公开实施例提供的一种无源光网络的组成示意框图；
图2为本公开实施例提供的一种网络单元注册方法的信令图；
图3为本公开实施例提供的一种光网络单元注册的方法的流程图；
图4为本公开实施例提供的一种光网络单元注册的方法的信令图；
图5为本公开实施例提供的另一种光网络单元注册的方法的流程图；
图6为本公开实施例提供的另一种光网络单元注册的方法中部分步骤的流程图；
图7为本公开实施例提供的另一种光网络单元注册的方法中部分步骤的流程图；
图8为本公开实施例提供的另一种无源光网络的组成示意框图；
图9为本公开实施例提供的另一种光网络单元注册的方法的流程图；
图10为本公开实施例提供的另一种光网络单元注册的方法的流程图；
图11为本公开实施例提供的一种写入注册信息的方法的流程图；
图12为本公开实施例提供的一种光线路终端的组成框图；
图13为本公开实施例提供的一种光网络单元的组成框图；
图14为本公开实施例提供的一种前置光网络单元的组成框图；
图15为本公开实施例提供的一种注册设备的组成框图。
具体实施方式
下面结合附图对本公开实施例提供的光网络单元注册的方法、写入注册信息的方法、光线路终端、光网络单元、前置光网络单元、注册设备进行详细描述。
在下文中将参考附图更充分地描述本公开实施例，但是所示的实施例可以以不同形式来体现，且不应当被解释为限于本公开阐述的实施例。
本公开实施例可借助本公开的示意图而参考平面图和/或截面图进行描述。因此，可根据制造技术和/或容限来修改示例图示。
在不冲突的情况下，本公开各实施例及实施例中的各特征可相互组合。
本公开所使用的术语仅用于描述特定实施例，且不意欲限制本公开。如本公开所使用的术语“和/或”包括一个或多个相关列举条目的任何和所有组合。如本公开所使用的单数形式“一个”和“该”也意欲包括复数形式，除非上下文另外清楚指出。如本公开所使用的术语“包括”、“由……制成”，指定存在所述特征、整体、步骤、操作、元件和/或组件，但不排除存在或添加一个或多个其它特征、整体、步骤、操作、元件、组件和/或其群组。
除非另外限定，否则本公开所用的所有术语(包括技术和科学术语)的含义与本领域普通技术人员通常理解的含义相同。
本公开实施例不限于附图中所示的实施例，而是包括基于制造工艺而形成的配置的修改。因此，附图中例示的区具有示意性属性，并且图中所示区的形状例示了元件的区的具体形状，但并不是旨在限制性的。
名词解释
本公开实施例中，若没有额外解释，则以下技术术语的意义，应按照以下解释理解：
其中，“注册”是指光网络单元(ONU)在与光线路终端(OLT)建立物理连接(即连接到分支光纤)后，通过信息交互使ONU和OLT都获取所需信息，从而ONU能够被OLT有效管控，进入工作状态，实现与OLT间业务信息的交互。
其中，“注册信息”是指OLT在注册过程中需要使用到的信息，其可以通过与ONU的交互得到，也可根据与ONU交互得到的信息计算得到。
其中，“注册配置信息”是指ONU在注册过程中需要获取的信息，ONU需要根据注册配置信息配置自身的状态，从而完成注册过程。具体的，注册配置信息可以是注册信息的一部分，也可以是根据注册信息计算得到的。
参照图1，在一些相关技术中，无源光网络可包括位于中心局的OLT，OLT通过分光器与多条分支光纤分别连接，每个分支光纤可连接一个位于用户端的ONU。
其中，部分ONU仅通过一条上下行通道连接OLT，该通道也称“业务通道”，是用于传输业务信息的，这些ONU称为第一ONU(图中为ONU1)，或非低时延ONU。
示例性的，以上业务通道具体可包括10吉比特对称无源光网络(10-Gigabit-Capable Symmetric PON，XGS-PON)的上行通道(λ XGS-PONu)和下 行通道(λ XGS-PONd)。业务通道的具体形式不限于此。
其中，每个ONU在注册完成后，根据OLT为其配置的授权带宽工作，故不同ONU的上行信息必然互不干扰。而对于未注册的ONU，其在注册过程中发送的上行信息可能与其它ONU的上行信息冲突，从而造成信息丢失、错误等。
为此，在第一ONU的注册过程中，OLT需要在业务通道开放安静窗口(Slient Window)，暂停其它ONU的上行信息，但这会导致业务信息的传输产生严重的时延，甚至无法满足移动前传、移动回传、高清视频业务、增强现实(AR)业务等对传输时延要求很严格的业务的要求。
第一ONU的注册过程可参照图2，包括：
S001、OLT周期性的在业务通道打开安静窗口，广播下发身份标识请求消息。
S002、若有第一ONU已接入(建立物理连接)无源光网络但还未进行注册，则该第一ONU在接收到身份标识请求消息后，向OLT发送包括自身的身份标识的身份标识响应消息。
其中，ONU的身份标识是用于区分不同ONU设备的唯一的标志，其具体形式可根据无源光网络形式的不同而不同。示例性的，对于GPON系列的ONU，身份标识可以是序列号(Serial Number，SN)；而对于以太网无源光网络(Ethernet Passive Optical Network，EPON)系列的ONU，身份标识可以是其媒体接入控制(Media Access Control，MAC)地址。
其中，该第一ONU可以是首次接入并注册的；也可以是之前注册后离线，再重新接入并重新注册的。
S003、OLT接收到身份标识响应消息并关闭安静窗口，确定当前有第一ONU需要注册，完成对ONU的“发现”，并向该第一ONU下发逻辑标识。
其中，逻辑标识是由OLT为ONU分配的、在无源光网络中起识别ONU的作用的唯一标识，其具体形式可根据无源光网络形式的不同而不同。示例性的，对于GPON系列，ONU的逻辑标识可以是ONU ID；而对于EPON系列，ONU的逻辑标识可以是根据MAC地址算出的逻辑链路标识(Logical Link Identifier，LLID)。
其中，由于此时OLT已经获取了第一ONU的身份标识并向第一ONU分配了逻辑标识，故此后OLT向该第一ONU下发的信息实质均为单播，而不再是广播。
S004、OLT再次在业务通道打开安静窗口，向该第一ONU下发测距请求消 息。
S005、该第一ONU接收到测距请求消息后，向OLT发送测距响应消息。
S006、OLT接收到测距响应消息并关闭安静窗口，再根据测距请求消息、测距响应消息的时间差，可以计算得到双向传输时间(Round-trip time，RTT)，再结合业务通道的波长，可计算得出OLT相对第一ONU的均衡延时(Eqd)，完成“测距”，并可向该第一ONU下发均衡延时。
其中，“均衡延时”是表示信息在OLT和相应ONU间传输所需的时间的参数，其实质上由OLT和相应ONU间的等效距离或逻辑距离决定。应当理解，均衡延时的具体参数形式可以是多样的，只要某个参数(或信息)实质上能代表以上内容，则该参数(或信息)就称为“均衡延时”。
S007、OLT根据均衡延时，计算出分配给该第一ONU的授权带宽，向该第一ONU下发授权带宽。
S008、该第一ONU根据接收到的逻辑标识、均衡延时、授权带宽进行自身状态的配置，完成注册，从而可开始根据授权带宽向OLT发送业务信息。
其中，OLT在注册过程中获取到的各种信息均可称为注册信息，例如ONU的身份标识、均衡延时、逻辑标识、授权带宽等，或者，其中的部分内容也可不属于注册信息，如逻辑标识、授权带宽。
其中，OLT发送给ONU，用于供ONU进行配置的信息为注册配置信息，注册配置信息具体可包括逻辑标识、均衡延时、授权带宽等。其中，注册配置信息可以是注册信息的一部分，也可以是根据注册信息计算得出的，例如，授权带宽可根据均衡延时计算得到。
其中，针对不同类型的无源光网络，其中注册配置信息的具体内容可不同。例如，在EPON系列中，均衡延时可不发送给ONU，故其不属于注册配置信息。
可见，以上注册过程中，为保证第一ONU的身份标识响应消息和测距响应消息不与其它ONU的上行信息冲突，需要开放安静窗口，停止其它ONU的业务信息上传，从而造成业务信息的时延。
在另一些相关技术中，参照图1，无源光网络中还可有另一部分ONU是支持“第三波长通信”的，它们称为第二ONU(图中为ONU2)，或者说是低时延ONU。
第二ONU除通过以上业务通道与OLT连接外，还通过另一个注册通道与OLT连接，该注册通道中使用的通信波长为第三波长，其不同于业务通道中使用的通信波长。
示例性的，以上注册通道包括吉比特对称无源光网络(Gigabit-Capable Symmetric PON，GPON)的上行通道(λ PONu)和下行通道(λ PONd)。注册通道的具体形式不限于此，只要其不同于业务通道即可。
应当理解，以上业务通道、注册通道是相对独立的，即二者中的信息传递互不影响。
为此，对支持第三波长通信的第二ONU，其注册相关的信息可在注册通道(第三波长的通道)中传输，从而其注册过程对业务信息没有影响。
其中，在注册通道中进行注册的具体过程可与第一ONU在业务通道中进行注册的具体过程相对应(只是通道不同)，在此不再详细描述。
虽然支持第三波长通信的ONU在注册时不会导致业务信息的时延，但是，现网中已经存在的很多ONU是不支持第三波长通信的，或者说是非低时延ONU(第一ONU)，而这些ONU仍然存在时延问题。
尤其是，在新一代通信网络(如5G通信网络)的推广过程中，为兼顾现有网络设备和成本，通常无法完全使用低时延ONU构建无源光网络，而是会在较长时间内，仍然有低时延ONU和非低时延ONU共存的现象。
另外，对支持第三波长通信的ONU，其注册过程中仍然需要在注册通道开放安静窗口，但随着技术的发展，注册通道可能也需要用于传输其它有用的信息，而这些信息的传输也会因安静窗口的存在而产生较大时延。
第一方面，参照图1，本公开实施例提供一种ONU注册的方法。
本公开实施例的方法用于供OLT执行，以完成ONU的注册。
参照图3、图4，本公开实施例的方法包括：
S101、根据提前获取的待注册ONU的注册信息，下发注册配置信息，完成待注册ONU的注册。
其中，待注册ONU的注册信息是在本次注册开始之前获取的。
在本次注册开始之前，OLT已经通过某些方式(具体方式后续描述)预先获取到了针对待注册ONU的注册信息(并可将其保存下来)，并可将注册信息存储下来。从而当本次注册过程开始后，OLT可在没有从待注册ONU获取到信息(注册信息)的情况下，直接利用自身已经获取的注册信息，得到注册配置信息并下发(如广播下发)给待注册ONU，供待注册ONU进行配置，完成注册过程。
应当理解，只有某个ONU没有注册时，才需要对其进行注册，故本步骤(S101)开始进行时，待注册ONU应当还处于“未开始注册”的状态，而非已 经进行了一部分注册流程。
应当理解，由于注册信息可能与接入位置(如某个分支光纤)有关，故待注册ONU应当是连接到与其注册信息对应的位置的。
应当理解，虽然进行本步骤(S101)之前，需要已经获取了待注册ONU的注册信息，但其不代表每次进行本步骤都要先进行一次获取待注册ONU的注册信息的步骤，即在OLT获取到待注册ONU的注册信息后，后续可多次利用该注册信息进行本步骤S101(即进行注册)。
其中，下发的注册配置信息的具体内容可有多项(如逻辑标识、均衡延时、授权带宽等)，这些内容可以携带在一条信息中一次下发，也可以是参照图4分为多次下发的。
其中，根据具体应用环境的不同，本公开实施例中的待注册ONU形式可不同。
例如，作为本实施例的一种方式，待注册ONU可以是之前曾经进行过注册，但之后离线，又“重新”接入的ONU。
再如，作为本实施例的另一种方式，待注册ONU可以是之前没有注册过的“全新”接入的ONU。
再如，作为本实施例的另一种方式，也可以是一个分支光纤曾经连接某个ONU，而后“更换”为待注册ONU(此时待注册ONU也是新的)。
可见，本公开实施例中，在具体注册步骤开始前，OLT已经预先获取到了针对待注册ONU的注册信息，从而注册过程中，OLT可直接根据预先获取的注册信息向待注册ONU下发注册配置信息，而不需要接收来自待注册ONU的信息。也就是说，本公开实施例中，注册过程中只要OLT“下发信息”即可，而下发信息并不存在冲突问题，故其注册过程中不需要开放安静窗口，避免了开窗对系统造成的影响，大大降低了业务信息的时延。
本公开实施例的注册过程中传递的信息总量也减少了，例如，其中不用传输身份标识请求消息、测距请求消息、测距响应消息等，故即使不考虑安静窗口，其注册过程本身所耗费的时间和信息量也都较少。
由此，本公开实施例可实现ONU的快速注册，减少业务信息的时延，满足移动前传、移动回传、高清视频业务、增强现实(AR)业务等对传输时延要求很严格的业务的要求。
在一些实施例中，注册信息包括以下至少一项：
ONU的身份标识；ONU的身份标识包括ONU的序列号，或，ONU的MAC 地址；
ONU的均衡延时。
为完成注册，OLT至少需要获得ONU的身份标识和均衡延时(Equalization Delay，Eqd)，即注册信息要包括“身份标识-均衡延时”的对应关系。
身份标识可为以上的序列号(SN)或MAC地址等。
在一些实施例中，注册配置信息包括以下至少一项：
待注册ONU的逻辑标识；逻辑标识包括待注册ONU的ONU-ID，或，待注册ONU的逻辑链路标识；
ONU的均衡延时；
分配给待注册ONU的授权带宽。
为完成注册，OLT下发给待注册ONU的信息至少应包括分配给待注册ONU的逻辑标识以及授权带宽，其中授权带宽可以是根据均衡延时计算得到的(也通过其它方式确定)；同时，在部分无源光网络中，均衡延时也可作为注册配置信息下发给待注册ONU。
身份标识可为以上的序列号ONU-ID或逻辑链路标识(LLID)等。
在一些实施例中，以上授权带宽前后分别具有预设的保护间隔。
本公开实施例中的授权带宽是根据预存的均衡延时得出的，而非根据实时测试的均衡延时得出的，故其可能存在一定的误差(如因无源光网络整体状况发生变化而导致的误差)。因此，本公开实施例中分配的授权带宽的前后，都应是未使用的时间，即具有较大的保护间隔，以保证在授权带宽有误差的情况下，OLT仍可在保护间隔中接收到待注册ONU的业务信息，避免业务信息冲突。
注册信息和注册配置信息的具体内容、形式等，可根据需要进行调整。例如，均衡延时若不下发给待注册ONU，则不属于注册信息。再如，逻辑标识、授权带宽等，可不属于注册信息(故每次下发前计算得到)，但也可以直接包括在注册信息中(故每次下发前从注册信息中提取)。
在一些实施例中，下发注册配置信息(S101)包括：周期性的下发注册配置信息。
作为本公开实施例的一种方式，注册配置信息可以是周期性重复下发的，即，在获取待注册ONU的注册信息后，只要待注册ONU还没开始注册(例如发现待注册ONU下线)，则可每隔预定的时间，就下发一次注册配置信息，以“尝试”让待注册ONU完成注册。
根据以上方式，待注册ONU在获得授权带宽前，不需要发送任何信息，不会对业务信息的传输造成影响。
在一些实施例中，下发注册配置信息(S101)包括：当满足触发条件时，下发注册配置信息。
在一些实施例中，触发条件包括以下至少一项：
接收到预定的触发信息；
接收到除待注册ONU外的ONU的业务信息，并在业务信息中发现可纠正的错误。
或者，作为本公开实施例的另一种方式，也可以是通过某些条件确认待注册ONU已经接入，从而触发注册配置信息的下发(即触发注册过程)。
在一实施例中，可以是待注册ONU在需要注册时(如接入时，或接到用户的命令时)主动向OLT发送触发信息，从而OLT在接收到触发信息后才开始下发注册配置信息。
其中，以上触发信息可为短消息，从而其与其它ONU上传的业务信息冲突的概率较低；且即使当短消息与业务信息冲突时，虽然会导致业务信息发生错误，但该错误通常是可纠正的。因此，OLT也可在发现接收到的业务信息存在错误，且错误可被纠正时，认为实际上是待注册ONU发送了触发信息，故开始下发注册配置信息(即开始注册过程)。
根据以上方式，OLT仅在待注册ONU确实需要注册时才下发注册配置信息，其中不会产生无用的信息传递，可降低对下行通道的占用。
在一些实施例中，在下发注册配置信息(S101)后，还包括：
S102、接收待注册ONU发送的上线响应信息。
ONU在接收到注册配置信息后即可完成注册，并可以在授权带宽内上传业务信息。
但本公开实施例中，在注册过程中OLT仅下发信息而不接收来自待注册ONU的信息，故OLT无法确定待注册ONU是否已经接收到注册配置信息而完成注册。因此，参照图5，待注册ONU可在接收到注册配置信息并完成注册后，在配置给其的授权带宽中向OLT反馈上线响应信息。
相应的，OLT只有在接收到上线响应信息后，才会确定待注册ONU的注册已经完成；反之，若OLT在注册配置信息后，在预定时间内未接收到上线响应信息，则可认为待注册ONU未能完成注册(如未接入、未上电等)，需要后续在合适机会再次下发注册配置信息。
上线响应信息的具体形式可以是多样的。例如，上线响应信息可采用现有的Acknowledge消息实现，如下表所示，其中ONU-ID为分配给待注册ONU的逻辑标识，SeqNo为0，Completion code为0。上线响应信息也可以用其它形式的消息。
Figure PCTCN2021074664-appb-000001
在某些情况下(如注册配置信息在满足触发条件后下发时)，也可默认待注册ONU必然接收到了注册配置信息而完成了注册，从而不需要上线响应信息，OLT只要在发出注册配置信息后，等待待注册ONU的业务信息即可。
在一些实施例中，在下发注册配置信息(S101)后，还包括：
S103、接收待注册ONU发送的业务信息。
S104、根据业务信息和注册配置信息的授权带宽，调整待注册ONU的注册信息中的均衡延时。
参照图4、图5，在注册完成后，待注册ONU可以开始根据分配给其的授权带宽向OLT发送业务信息。如前，由于本公开实施例中的授权带宽是根据预存的均衡延时得出的，而非根据实时测试的均衡延时得出，故其可能存在一定的误差(例如因无源光网络的整体状况发生变化导致的误差)。
为此，可在待注册ONU开始业务信息传递后，根据接收到业务信息的时间等重新确定均衡延时，并对获取的业务信息中的均衡延时进行调整(或者说更新)，以保证均衡延时的准确性，从而在后续(如下一次注册时)“修正”授权带宽。
在一些实施例中，参照图6，提前获取待注册ONU的注册信息的过程包括：
S1001、在待注册ONU于本次注册前完成过的注册或工作过程中，获取待 注册ONU的注册信息。
也就是说，在下发注册配置信息(S101)前，本公开实施例的方法还可包括获取注册ONU的注册信息的步骤。
而以上步骤具体是，在本次注册过程(S101)开始前，待注册ONU进行的其它注册过程中，OLT获取到待注册ONU的注册信息并将其保存下来。
或者，而以上步骤也可以是，在本次注册过程(S101)开始前，待注册ONU曾经处于工作状态，从而OLT在工作状态中获取到待注册ONU的注册信息并将其保存下来(如以上对保存的均衡延时的修正)。
应当理解，对本次注册过程(S101)而言，其开始时待注册ONU必然是未开始注册的状态，即待注册ONU在注册(或工作)而使OLT获取到注册信息后，应当发生离线，之后才能开始本次注册过程。
其中，以上待注册ONU的注册，可以是其的首次注册，也可以是重新注册。
其中，以上待注册ONU的注册，可以采用相关技术的方式，或者，也采用本公开实施例的步骤S101的方式。
其中，这里的待注册ONU可以是支持第三波长通信的低时延ONU(第二ONU)，也可以是不支持第三波长通信的非低时延ONU(第一ONU)。
在一些实施例中，参照图7，提前获取待注册ONU的注册信息的过程包括：
S1003、修改前置ONU的注册信息为待注册ONU的注册信息。
也就是说，在下发注册配置信息(S101)前，本公开实施例的方法还可包括获取注册ONU的注册信息的步骤。
作为本公开实施例的另一种方式，以上步骤也可以是，在本次注册过程(S101)开始前，OLT中已经存在对另一个ONU(前置ONU)的注册信息，而通过对该前置ONU的注册信息进行修改，也可得到待注册ONU的注册信息。
其中，以上前置ONU是一个不同于待注册ONU的ONU，且其接入到待注册ONU应连接的特定位置(如特定分支光纤)。该前置ONU可以是实际存在并曾经接入无源光网络的实体设备；或者，前置ONU也可以不是实体设备，或没有接入过无源光网络，但只要OLT能提前获得有关该前置ONU的注册信息即可。
其中，由于前置ONU与待注册ONU应连接在相同位置，故二者的均衡延时(Eqd)等信息应当是相同的。因此，以上修改主要是指，将前置ONU的注册信息中的前置ONU的身份标识，修改为待注册ONU的身份标识，或者说，修改了“身份标识-均衡延时”的对应关系；从而使前置ONU的注册信息变为 待注册ONU的注册信息。
其中，触发以上修改的方式是多样的。
例如，可以是网管通过专门的操作，向OLT发出修改信息，以修改其中存储的前置ONU的注册信息。
或者，也可以是前置ONU在注册完成后，自身向OLT发出修改信息，以修改其中存储的前置ONU的注册信息。
在一些实施例中，在修改前置ONU的注册信息为待注册ONU的注册信息(S1003)前，还包括：
S1002、完成前置ONU的注册，在注册过程中获取前置ONU的注册信息。
也就是说，在修改前置ONU的注册信息前，可以实际将前置ONU接入无源光网络，并完成注册，以使OLT在注册过程中获取针对前置ONU的注册信息，并用于后续的修改。
具体的，可以是在无源光网络已经连接有一个ONU，当后续需要将该ONU更换为另一个ONU时，可预先修改OLT中该在前ONU的注册信息，从而被更换的ONU就是前置ONU，而更换上来的新ONU就是待注册ONU。
或者，也可以是在确定要在某个位置接入待注册ONU后，先将一个特定的前置ONU(注册设备)接入该位置并进行以上修改，之后再将前置ONU更换为待注册ONU，或者同时将待注册ONU接入到该位置(例如分支光纤可具有两个端口，分别连接前置ONU和待注册ONU)。
也就是说，以上方式相当于用前置ONU使OLT提前获取待注册ONU的注册信息，再实际接入待注册ONU。
在一些实施例中，完成前置ONU的注册包括接收前置ONU发送的至少一个响应信息；其中，响应信息是通过与业务通道不同的注册通道接收的。
根据某些注册方式，ONU的注册可包括OLT与ONU间的信息交互(例如采用相关技术中的注册方式)，为防止前置ONU的注册造成业务信息的时延，故前置ONU可以是支持第三波长通信的低时延ONU(第二ONU)，且注册过程中，至少上行信息通过业务通道传递(因此不必在业务通道打开安静窗口)。
后续过程中下发待注册ONU的注册配置信息时，仍然可通过业务通道下发，即待注册ONU可以是不支持第三波长通信的非低时延ONU(第一ONU)。
也就是说，以上方式可以是：当要进行非低时延ONU(第一ONU)的注册时，可用低时延ONU(第二ONU)作为前置ONU，以避免非低时延ONU按照相关技术的方式进行注册，最大程度的降低业务信息的时延。
应当理解，只要注册过程中的上行信息在注册通道中发送，就没有必要在业务通道打开安静窗口，也就不会造成业务信息的时延；因此，对注册过程中下行信息的传递通道，本公开实施例不做限制。
下面对如何利用低时延ONU(支持第三波长通信的ONU、第二ONU)为前置ONU，提前获取待注册ONU的注册信息进行示例性的描述。
其中，无源光网络结构可参照图1，包括多个与OLT连接的ONU，这些ONU中一部分为低时延ONU，即图中的各ONU2，另一部分为非低时延ONU(不支持第三波长通信的ONU、第一ONU)，即图中的各ONU1。
其中，业务通道为XGS-PON上下行通道，而第二ONU的注册通道为GPON上下行通道。
在一实施例中，以上过程可包括：
A101、OLT在GPON通道打开安静窗口，通过GPON下行通道广播发送身份标识请求消息。
A102、OLT通过GPON上行通道接收第二ONU发送的身份标识响应消息并关闭安静窗口，从而得到身份标识响应消息中携带的第二ONU的序列号(SN)，并根据序列号得出要分配给该第二ONU的ONU ID。
A103、OLT再次在GPON上行通道打开安静窗口，通过GPON下行通道向该第二ONU发送测距请求消息。
A104、OLT在GPON上行通道接收该第二ONU发送的测距响应消息，计算出均衡延时(Eqd)，从而获取到第二ONU(前置ONU)的注册信息。
A105、OLT根据以上注册信息，通过GPON下行通道给第二ONU分配ONU ID和授权带宽，且可选的，也可通过GPON下行通道将均衡延时分配给第二ONU，从而完成第二ONU的注册。
A106、OLT接收修改信息(可来自网管，或来自该第二ONU)，根据修改信息将第二ONU(前置ONU)的注册信息中的序列号修改为要更换的第一ONU(待注册ONU)的序列号，从而提前得到待注册ONU的注册信息。
其中，以上第二ONU(前置ONU)的注册过程完全在注册通道进行，故不会对业务信息产生影响；而即使待注册ONU为第一ONU，则因为待注册ONU的注册过程仅包括信息“下发”，故同样不用开启安静窗口。也就是说，在整个注册过程中，业务通道均不需要打开安静窗口，完全不会对业务信息的传递造成影响。
在一些实施例中，参考图8，以上使用的第二ONU的注册通道，可仅包括 上行通道，而不包括下行通道，例如，第二ONU可仅支持XGS-PON的上行通道(λ XGS-PONu)和下行通道(λ XGS-PONd)，以及GPON的上行通道(λ PONu)。
由此，在对以上第二ONU的注册过程中，对所有的第二ONU上传给OLT的信息(身份标识响应消息、测距响应消息)，仍然是由OLT在注册通道打开安静窗口后接收；而所有OLT下发给第二ONU的信息(身份标识请求消息、测距请求消息、注册配置信息)，则通过业务通道下发。
其中，根据以上方式，可能出现在业务通道未打开安静窗口时，有身份标识请求消息通过业务通道广播下发的情况，故若有未注册的第一ONU存在，则其可能会“误认为”该身份标识请求消息是针对自己发布的，从而错误的在业务通道反馈身份标识响应消息，与其它ONU的业务信息冲突。
为避免以上情况下，需要对注册通道中身份标识请求消息的格式进行修改，以区分针对第二ONU的身份标识请求消息和针对第一ONU的身份标识请求消息，使第一ONU不会错误的响应针对第二ONU的身份标识请求消息。其中，区分不同身份标识请求消息的具体方式是多样的，在此不再详细描述。
以上过程中OLT下发测距请求消息、注册配置信息等时，已经获取了第二ONU的身份标识，故这些信息是单播的，不存在以上问题。
第二方面，本公开实施例提供一种ONU注册的方法，用于ONU。
本公开实施例的方法，用于供ONU(即待注册ONU)实现以上注册过程。
参照图9，本公开实施例的方法包括：
S201、接收OLT下发的注册配置信息，开始进行注册。
其中，注册配置信息是OLT根据提前获取的待注册ONU的注册信息下发的，待注册ONU的注册信息是在本次注册开始之前获取的。
当ONU接入后，若OLT已经预先获取了针对该ONU的注册信息，则该ONU就是待注册ONU。从而，该ONU会直接接收到OLT下发的注册配置信息，并开始进行注册。
应当理解，以上“开始进行注册”是指，ONU只在接收到注册配置信息后，才开始自身的注册流程，而之前并没有进行发送身份标识响应消息、发送测距响应消息等步骤)。
S202、根据注册配置信息进行配置。
ONU接收到针对自身的注册配置信息后，可根据该注册配置信息的内容(如授权带宽、逻辑标识等)对自身进行配置，使自身完成注册，进入工作状态，可开始上传业务信息。
在一些实施例中，参照图10，在根据注册配置信息进行配置(S202)后，还包括：
S203、向OLT发送上线响应信息。
如前，ONU在根据注册配置信息进行完配置，进入工作状态后，可在授权带宽中向OLT发送上线响应信息，通知OLT自身注册完成。
在一些实施例中，参照图10，在接收OLT下发的注册配置信息(S201)前，还包括：
S200、向OLT发送触发信息。
如前，当ONU需要进行注册时(如接入时，或接到用户的命令时)，可向OLT发出上线响应信息(如为短消息)，以通知OLT开始发送注册配置信息。
第三方面，本公开实施例提供一种写入注册信息的方法，用于前置ONU。
本公开实施例的方法，用于供以上的前置ONU进行注册，并修改OLT中的前置ONU的注册信息得到待注册ONU的注册信息。
参照图11，本公开实施例的方法包括：
S301、完成注册，以供OLT获取前置ONU的注册信息。
前置ONU接入无源光网络后完成注册，其具体可采用相关技术的方式，或采用本公开实施例的步骤S101的方式，在此不再详细描述。
在注册过程中，OLT获取了针对该前置ONU的前置ONU的注册信息，例如前置ONU的身份标识为SN A，均衡延时为Eqd1，则OLT获取的前置ONU的注册信息中包括“SN A-Eqd1”的对应关系。
S302、接收对应待注册ONU的修改信息。
前置ONU接收到如何进行修改的修改信息。例如，修改信息可以是用户输入的，其中可包括待注册ONU的身份标识，例如SN B。
S303、根据修改信息，触发OLT修改前置ONU的注册信息为待注册ONU的注册信息。
前置ONU中可根据以上修改信息(如SN B)，向OLT发出指令，使OLT将其中前置ONU的注册信息修改，得到待注册ONU的注册信息，例如，可以是将前置ONU的注册信息中“SN A-Eqd1”的对应关系修改为“SN B-Eqd1”。
应当理解，以上步骤S302和步骤S303可以并无必然的顺序关系，只要二者在进行步骤S303前均完成即可。
可见，此时OLT已经预先获取了待注册ONU的注册信息，故当待注册ONU 接入并进行注册时，则不必开放安静窗口，可降低时延。
应当理解，在进行注册信息的修改后，对OLT而言，前置ONU变成了“没有注册”的状态，故此时前置ONU不应再进行业务数据的传输。
可以是在完成修改后即将前置ONU从分支光纤上取下，而替换为待注册ONU。如果分支光纤具有两个端口，则也可以保留前置ONU，而将待注册ONU同时连接在另一端口上。
在一些实施例中，完成注册包括接收OLT下发的至少一个请求信息，以及向OLT发送至少一个响应信息；响应信息是通过与业务通道不同的注册通道发送的。
也就是说，前置ONU可以是低时延ONU(支持第三波长通信的ONU、第二ONU)，从而其注册过程不会造成业务信息的时延。
进一步的，当待注册ONU为非低时延ONU(不支持第三波长通信的ONU、第一ONU)时，则相当于用“借用”低时延的前置ONU写入了非低时延的待注册ONU的注册信息，以保证非低时延的待注册ONU即使在首次注册时，也不对业务信息造成时延。
第四方面，参照图12，本公开实施例提供一种OLT，其包括：
存储器，其上存储有一个或多个程序，当一个或多个程序被一个或多个处理器执行，使得OLT实现上述任意一种ONU注册的方法；
一个或多个输入/输出(Input/Output，I/O)接口，连接在处理器与存储器之间，配置为实现处理器与存储器之间的信息交互。
第五方面，参照图13，本公开实施例提供一种ONU，其包括：
存储器，其上存储有一个或多个程序，当一个或多个程序被一个或多个处理器执行，使得ONU实现上述任意一种ONU注册的方法；
一个或多个I/O接口，连接在处理器与存储器之间，配置为实现处理器与存储器之间的信息交互。
第六方面，参照图14，本公开实施例提供一种前置ONU，其包括：
存储器，其上存储有一个或多个程序，当一个或多个程序被一个或多个处理器执行，使得前置ONU实现上述任意一种写入注册信息的方法；
一个或多个I/O接口，连接在处理器与存储器之间，配置为实现处理器与存储器之间的信息交互。
第七方面，参照图15，本公开实施例提供一种注册设备，用于连接OLT， 注册设备包括：
注册模块，配置为完成注册，以供OLT获取注册设备的注册信息；其中，完成注册过程中上传给OLT的响应信息是通过与业务通道不同的注册通道发送的；
接收模块，配置为接收对应待注册ONU的修改信息；
修改模块，配置为根据修改信息，触发OLT修改注册设备的注册信息为待注册ONU的注册信息。
本公开实施例的注册设备，可为低时延ONU(但可以没有传输业务信息的能力)，该注册设备可被预先接入无源ONU，以在注册过程中使OLT预先获取自身的注册信息；并且，该注册设备还可接收用户的修改信息，以根据该修改信息，控制OLT修改注册信息(如修改身份标识)，得到待注册ONU的注册信息，以供后续待注册ONU进行注册。
本领域普通技术人员可以理解，上文中所公开的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、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(CPU)、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，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)和通信介质(或暂时性介质)。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、程序模块或其它数据)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随机存取存储器(Random Access Memory，RAM)，更具体如同步动态随机存取内存(Synchronous Dynamic Random Access Memory，SDRAM)、双倍速率同步动态随机存储器(Double Data Rate，DDR)等、只读存储器(Read Only Memory，ROM)、带电可擦可编程只读存储器(Electrically Erasable Programmable Read Only Memory，EEPROM)、闪存(FLASH)或其它磁盘存储器；只读光盘(Compact Disc Read Only Memory，CD-ROM)、数字多功能盘(Digital Video Disk，DVD)或其它光盘存储器；磁盒、磁带、磁盘存储或其它磁存储器；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它的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机 可读指令、数据结构、程序模块或者诸如载波或其它传输机制之类的调制数据信号中的其它数据，并且可包括任何信息递送介质。

Claims (22)

  1. 一种光网络单元注册的方法，用于光线路终端，所述方法包括：
    根据提前获取的待注册光网络单元的注册信息，下发注册配置信息，完成所述待注册光网络单元的注册；其中，所述待注册光网络单元的注册信息是在本次注册开始之前获取的。
  2. 根据权利要求1所述的方法，其中，所述提前获取所述待注册光网络单元的注册信息的过程包括：
    在所述待注册光网络单元于所述本次注册前完成过的注册或工作过程中，获取所述待注册光网络单元的注册信息。
  3. 根据权利要求1所述的方法，其中，所述提前获取所述待注册光网络单元的注册信息的过程包括：
    修改前置光网络单元的注册信息为所述待注册光网络单元的注册信息。
  4. 根据权利要求3所述的方法，其中，在所述修改前置光网络单元的注册信息为所述待注册光网络单元的注册信息前，还包括：
    完成所述前置光网络单元的注册，在所述注册过程中获取所述前置光网络单元的注册信息。
  5. 根据权利要求4所述的方法，其中，
    所述完成所述前置光网络单元的注册包括接收所述前置光网络单元发送的至少一个响应信息；其中，所述响应信息是通过与业务通道不同的注册通道接收的。
  6. 根据权利要求1所述的方法，其中，所述注册信息包括以下至少一项：
    光网络单元的身份标识；所述光网络单元的身份标识包括光网络单元的序列号，或，光网络单元的媒体接入控制MAC地址；
    光网络单元的均衡延时。
  7. 根据权利要求1所述的方法，其中，所述注册配置信息包括以下至少一项：
    所述待注册光网络单元的逻辑标识；所述逻辑标识包括所述待注册光网络单元的光网络单元标识ONU-ID，或，所述待注册光网络单元的逻辑链路标识；
    所述待注册光网络单元的均衡延时；
    分配给所述待注册光网络单元的授权带宽。
  8. 根据权利要求7所述的方法，其中，
    所述授权带宽前后分别具有预设的保护间隔。
  9. 根据权利要求7所述的方法，其中，在所述下发注册配置信息后，还包括：
    接收所述待注册光网络单元发送的上线响应信息。
  10. 根据权利要求1所述的方法，其中，在所述下发注册配置信息后，还包括：
    接收所述待注册光网络单元发送的业务信息；
    根据所述业务信息和所述注册配置信息的授权带宽，调整所述待注册光网络单元的注册信息中的均衡延时。
  11. 根据权利要求1所述的方法，其中，所述下发注册配置信息包括：
    周期性的下发所述注册配置信息。
  12. 根据权利要求1所述的方法，其中，所述下发注册配置信息包括：
    在满足触发条件的情况下，下发所述注册配置信息。
  13. 根据权利要求12所述的方法，其中，所述触发条件包括以下至少一项：
    接收到预定的触发信息；
    接收到除所述待注册光网络单元外的光网络单元的业务信息，并在所述业务信息中发现可纠正的错误。
  14. 一种光网络单元注册的方法，用于光网络单元，所述方法包括：
    接收光线路终端下发的注册配置信息，开始进行注册；其中，所述注册配置信息是所述光线路终端根据提前获取的待注册光网络单元的注册信息下发的，所述待注册光网络单元的注册信息是在本次注册开始之前获取的；
    根据所述注册配置信息进行配置。
  15. 根据权利要求14所述的方法，其中，在所述根据所述注册配置信息进行配置后，还包括：
    向所述光线路终端发送上线响应信息。
  16. 根据权利要求14所述的方法，其中，在所述接收光线路终端下发的注册配置信息前，还包括：
    向所述光线路终端发送触发信息。
  17. 一种写入注册信息的方法，用于前置光网络单元，所述方法包括：
    完成注册，以供光线路终端获取所述前置光网络单元的注册信息；
    接收对应待注册光网络单元的修改信息；
    根据所述修改信息，触发所述光线路终端修改所述前置光网络单元的注册信息为所述待注册光网络单元的注册信息。
  18. 根据权利要求17所述的方法，其中，
    所述完成注册包括向所述光线路终端发送至少一个响应信息；
    所述响应信息是通过与业务通道不同的注册通道发送的。
  19. 一种光线路终端，包括：
    存储器，存储有一个或多个程序，所述一个或多个程序被一个或多个处理器执行，使得所述光线路终端实现权利要求1至13中任意一项所述的光网络单元注册的方法；
    一个或多个输入/输出I/O接口，连接在所述一个或多个处理器与所述存储器之间，配置为实现所述一个或多个处理器与所述存储器的信息交互。
  20. 一种光网络单元，包括：
    存储器，存储有一个或多个程序，所述一个或多个程序被一个或多个处理器执行，使得所述光网络单元实现权利要求14至16中任意一项所述的光网络单元注册的方法；
    一个或多个输入/输出I/O接口，连接在所述一个或多个处理器与所述存储器之间，配置为实现所述一个或多个处理器与所述存储器的信息交互。
  21. 一种前置光网络单元，包括：
    存储器，存储有一个或多个程序，所述一个或多个程序被一个或多个处理器执行，使得所述前置光网络单元实现权利要求17或18所述的写入注册信息的方法；
    一个或多个输入/输出I/O接口，连接在所述一个或多个处理器与所述存储器之间，配置为实现所述一个或多个处理器与所述存储器的信息交互。
  22. 一种注册设备，用于连接光线路终端，所述注册设备包括：
    注册模块，配置为完成注册，以供所述光线路终端获取所述注册设备的注册信息；其中，在完成注册过程中上传给所述光线路终端的响应信息是通过与业务通道不同的注册通道发送的；
    接收模块，配置为接收对应待注册光网络单元的修改信息；
    修改模块，配置为根据所述修改信息，触发所述光线路终端修改所述注册设备的注册信息为所述待注册光网络单元的注册信息。
PCT/CN2021/074664 2020-03-07 2021-02-01 注册方法和设备、写入注册信息方法、光线路终端及光网络单元 WO2021179846A1 (zh)

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