WO2020063570A1 - 光网络的测距方法、通信方法、olt、onu、光网络系统 - Google Patents

光网络的测距方法、通信方法、olt、onu、光网络系统 Download PDF

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Publication number
WO2020063570A1
WO2020063570A1 PCT/CN2019/107464 CN2019107464W WO2020063570A1 WO 2020063570 A1 WO2020063570 A1 WO 2020063570A1 CN 2019107464 W CN2019107464 W CN 2019107464W WO 2020063570 A1 WO2020063570 A1 WO 2020063570A1
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Prior art keywords
onu
olt
time
uplink signal
registered
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PCT/CN2019/107464
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English (en)
French (fr)
Inventor
耿丹
李明生
贝劲松
袁立权
郭勇
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中兴通讯股份有限公司
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Priority to US17/277,946 priority Critical patent/US11425474B2/en
Priority to EP19865931.0A priority patent/EP3860141A4/en
Publication of WO2020063570A1 publication Critical patent/WO2020063570A1/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
    • 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
    • H04Q11/0005—Switch and router 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
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0047—Broadcast; Multicast
    • 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

  • This disclosure relates to, but is not limited to, the field of communications.
  • PON Passive Optical Network
  • Fig. 1 is a topology structure diagram of a PON system in the related art.
  • a PON system usually consists of an optical line terminal (OLT) at the office side, and an optical network unit (ONU) at the user side.
  • OLT optical line terminal
  • ONU optical network unit
  • ODN Optical Distribution Network
  • ODN usually using a point-to-multipoint network structure.
  • ODN consists of passive optical devices such as single-mode fiber, optical splitters, and optical connectors, and provides an optical transmission medium for the physical connection between the OLT and the ONU.
  • the development of low-latency services such as virtual reality services and 5G wireless services has put low-latency requirements on PON.
  • a method for ranging in an optical network including: an OLT broadcasts a first message, and the first message carries an OLT allocated to an ONU to be registered within a specified distance from the OLT.
  • the termination time of the first quiet window is no earlier than the optical signal sent by the ONU with the largest distance from the OLT within the specified distance range at the first transmission time
  • the first uplink signal carries the delay information of the ONU to be registered.
  • another ranging method for an optical network including: the ONU to be registered receives the first message broadcast by the OLT; wherein the ONU to be registered is located within a specified distance from the OLT, and The first message carries a first uplink bandwidth allocated by the OLT for the ONU to be registered and a first sending time indicating that the ONU to be registered sends a first uplink signal; and the ONU to be registered sends the first uplink signal to the OLT on the first uplink bandwidth.
  • the first uplink signal carries delay information of the ONU to be registered, and the delay information is time delay information between the time when the ONU to be registered actually sends the first uplink signal and the first sending time, so that the OLT is open Receive the first uplink signal in the first quiet window, and estimate the time between the ONU and the OLT to be registered according to the first time when the OLT broadcasts the first message, the first sending time, delay information, and the second time when the OLT receives the first uplink signal.
  • the first quiet window corresponding to the specified distance range starts no later than the ONU with the smallest distance from the OLT within the specified distance range.
  • An optical transmission timing signal transmission time reaches the OLT termination quiet time of the first time window is not earlier than the maximum distance ONU and the OLT within a specified distance of the optical signal reaches OLT in the first transmission time transmitted.
  • a communication method for an optical network which is applied to an OLT and includes: sending a broadcast message to an ONU, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU; The ONU opens a quiet window; and receives the uplink signal sent by the ONU in the quiet window.
  • another optical network communication method applied to an ONU, including: receiving a broadcast message sent by an OLT, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU; and, Send an out-of-band uplink signal to the OLT.
  • an OLT including: a sending module configured to send a broadcast message to an ONU, wherein the broadcast message is used to indicate an uplink bandwidth allocated to the ONU; an open module is configured to be predetermined The ONU in the area opens a quiet window; and a receiving module configured to receive an uplink signal sent by the ONU in the quiet window.
  • an ONU including: a receiving module configured to receive a broadcast message sent by an OLT, wherein the broadcast message is used to indicate an uplink bandwidth allocated for the ONU; and a transmitting module configured to Send an uplink signal to the OLT.
  • an optical network system including an OLT and an ONU, wherein the OLT is configured to send a broadcast message to the ONU, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU;
  • the ONU in the predetermined area opens a quiet window; and receives the uplink signal sent by the ONU in the quiet window;
  • the ONU is configured to receive a broadcast message sent by the OLT, where the broadcast message is used to indicate the uplink bandwidth allocated to the ONU; and the uplink signal is sent to the OLT .
  • a computer-readable storage medium on which a computer program is stored, and the computer program is configured to execute the distance measurement method or the optical network of the optical network provided by any one of the foregoing aspects when running.
  • Network communication method
  • an electronic device including a memory and a processor.
  • the memory stores a computer program
  • the processor is configured to run the computer program to perform distance measurement of the optical network provided by any one of the above aspects.
  • Method or communication method of optical network is provided.
  • FIG. 1 is a topology structure diagram of a PON system in the related art.
  • FIG. 2 is a schematic flowchart of a communication method for an optical network according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic flowchart of another communication method for an optical network according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of an OLT according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an ONU according to an embodiment of the present disclosure.
  • the OLT needs to perform ranging on the ONU to be registered. Since the OLT does not know the distance of the ONU to be registered from itself, the size of the quiet window opened by the OLT for ranging covers the PON. The minimum distance to the maximum distance supported by the system. The difference between the maximum distance and the minimum distance is 20km or 40km. Supports a PON system with a differential distance of 20km.
  • the standard recommends that the loop delay difference between the nearest ONU and the furthest ONU is 200 ⁇ s, the response time difference between the ONU is 2 ⁇ s, and the maximum random delay of the ONU is 48 ⁇ s. Therefore, the recommended quiet window is The size is 250 ⁇ s.
  • the standard recommends the loop delay difference between the nearest ONU and the furthest ONU is 400 ⁇ s, the response time difference between the ONU is 2 ⁇ s, and the maximum random delay of the ONU is 48 ⁇ s. Therefore, the recommended quiet window is The size is 450 ⁇ s.
  • the OLT does not allocate uplink bandwidth to the ONUs that have completed registration. Therefore, the ONUs that have completed registration cannot send uplink data within the time corresponding to the quiet window.
  • the OLT periodically opens a quiet window for ONU registration, so the PON system cannot solve the low-latency requirements of low-latency services.
  • FIG. 2 is a schematic flowchart of a communication method for an optical network according to an embodiment of the present disclosure. The method may include steps S202 to S206.
  • step S202 the OLT sends a broadcast message to the ONU, where the broadcast message is used to indicate the uplink bandwidth allocated to the ONU.
  • step S204 the OLT opens a quiet window for the ONU in the predetermined area.
  • step S206 the OLT receives the uplink signal sent by the ONU in a quiet window.
  • a quiet window is opened for an ONU in a predetermined area, and the quiet window corresponds to the ONU in the predetermined area, which solves the technical problem of excessive delay caused by opening the quiet window in related technologies and ensures transmission services on the link. Low latency requirements.
  • the execution subject of the above steps may be an OLT, but is not limited to the OLT.
  • opening a quiet window for an ONU in a predetermined area includes: opening multiple corresponding quiet windows for ONUs in multiple predetermined areas within a preset period, wherein one quiet window corresponding to one predetermined area, Or multiple non-adjacent quiet windows corresponding to multiple predetermined areas.
  • the OLT sends a broadcast message to the ONU as a bandwidth allocation process of the OLT.
  • opening a quiet window for an ONU of a predetermined area may include: opening an overlapping quiet window for an ONU of a predetermined area within one or more preset periods.
  • the boundaries of adjacent predetermined areas overlap, or the boundaries of adjacent predetermined areas do not overlap.
  • the broadcast message is also used to instruct the ONU to respond to the uplink bandwidth using an out-of-band signal, and the bandwidth allocation may be an uplink signal with a low rate and low optical power.
  • the out-of-band signal refers to the transmission of control information and data information through different physical channels. The two are completely independent and do not affect each other. In this embodiment, it refers to a physical channel that is different from transmitting data information.
  • the start time of the quiet window is the time when the ONU sends the uplink signal to the OLT at the smallest distance in the predetermined area
  • the end time of the quiet window is the time when the ONU sends the uplink signal to the OLT at the maximum distance in the predetermined area Moment.
  • receiving the uplink signal sent by the ONU in the quiet window includes: receiving a registration message sent by the ONU in the quiet window, wherein the registration message carries the identity information of the ONU and / or the delay information of the sending registration message. After that, the ONU can be ranged according to the delay information.
  • the predetermined area is an optical fiber distance between the ONU and the OLT in the PON system.
  • the predetermined area is a geographically divided area.
  • the OLT is connected to the ONU through an optical fiber. Based on the transmission time between the OLT and the ONU, the ONUs with different transmission times are divided into different areas. In the same area, the optical transmission with the OLT is in the same area
  • the time ranges are the same (for example, they are in the range of 8us to 10us).
  • FIG. 3 is a schematic flowchart of another communication method for an optical network according to an embodiment of the present disclosure. The method may include steps S302 and S304.
  • step S302 the ONU receives a broadcast message sent by the OLT, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU.
  • step S304 the ONU sends an out-of-band uplink signal to the OLT.
  • sending an out-of-band uplink signal to the OLT may include: sending a registration message to the OLT with a low rate of low optical power, wherein the registration message carries the identity information of the ONU and / or the delay information of sending the registration message .
  • the technical solution of the present disclosure that is essentially or contributes to the existing technology can be embodied in the form of a software product that is stored in a storage medium (such as ROM / RAM, magnetic disk, The optical disc) includes several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the embodiments of the present disclosure.
  • a terminal device which may be a mobile phone, a computer, a server, or a network device, etc.
  • a communication device for an optical network is also provided.
  • the device may be an OLT or an ONU, which are respectively used to implement the foregoing embodiments and preferred implementations, which have already been described and will not be described again.
  • the term "module” may implement a combination of software and / or hardware for a predetermined function.
  • the OLT may include a sending module 40 configured to send a broadcast message to the ONU, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU.
  • An open module 42 configured to open a quiet window for an ONU in a predetermined area; and a receiving module 44 for receiving an uplink signal sent by the ONU in the quiet window.
  • the ONU may include a receiving module 50 configured to receive a broadcast message sent by an OLT, where the broadcast message is used to indicate an uplink allocated for the ONU. A bandwidth; and a sending module 52 configured to send an uplink signal to the OLT.
  • An embodiment of the present disclosure further provides a communication system for an optical network, which may include an OLT as shown in FIG. 4 and an ONU as shown in FIG. 5.
  • modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to the above: the above modules are located in the same processor; The forms are located in different processors.
  • the distance between the furthest ONU supported in the PON system and the OLT is set to L, for example, L is 20km.
  • the quiet window opened by the OLT for the ONU to register is divided into L.
  • the OLT opens a small Quiet window, such as a 10us quiet window
  • the start time of the quiet window corresponds to the time when the uplink signal sent by the ONU that is 0km away reaches the OLT
  • the end time of the quiet window corresponds to the arrival of the uplink signal sent by the ONU that is 1km away
  • the time of the OLT after a certain period of time, the OLT opens a second 10us quiet window.
  • the start time corresponds to the time when the uplink signal sent by the ONU that is 1km away reaches the OLT.
  • the end time of the quiet window corresponds to the distance of 2km from itself.
  • the start time corresponds to the time when the uplink signal sent by the ONU that is 19km away reaches the OLT, and the end time. Corresponds to the time when the uplink signal sent by the ONU with a distance of 20km reaches the OLT.
  • the OLT and ONU use the following main steps to send and receive data.
  • Step 1 The OLT sends a broadcast message to the ONU at time T1.
  • the content of the message is to allocate an uplink bandwidth to the ONU to be registered, and the start time of sending uplink data allocated to the ONU in the uplink bandwidth is Ts.
  • the OLT opens a small quiet window, such as a 10us quiet window.
  • the start time of the quiet window corresponds to the time when the uplink signal sent by the ONU that is 0km away reaches the OLT, and the end time of the quiet window corresponds to the ONU transmission that is 1km away. The time when the uplink signal reaches the OLT.
  • Step 2 The ONU to be registered sends an uplink signal to the OLT with a low optical power (for example, about tens to one hundred megabits per second) and a low optical power (for example, about -30 dBm).
  • the content is the ONU's identity information (serial number information or media). Access address information) and delay information D for sending the message.
  • Step 3 The OLT receives the uplink signal sent by the ONU in step 2 at time T2.
  • the OLT calculates the loop delay value of the ONU as T2-T1-Ts-D.
  • the OLT calculates the optical fiber distance L from the ONU to itself as C * (T2-T1-Ts-D) / 2, where C is the speed of light of the signal light in the fiber.
  • the OLT After the OLT completes the initial ranging of the ONU, the OLT sends the allocated uplink bandwidth to the ONU at time T3.
  • the start time allocated to the ONU is Tss, and the OLT estimates that the ONU adopts the ONU based on the preliminary ranging result of the ONU.
  • Step 4 After the ONU receives the bandwidth allocation of the OLT in step 3, the ONU sends the uplink signal to the OLT at the time Tss using the normal data transmission rate and normal optical power of the current PON system.
  • Step 5 The OLT receives the data sent by the ONU in step 4 at time T4, and the OLT completes accurate ranging of the ONU at a normal rate, and the loop delay is T4-T3-Tss.
  • the OLT repeats the above steps.
  • the quiet window opened for the second time is, for example, a quiet window of 10us.
  • the start time of the quiet window corresponds to the time when the uplink signal sent by the ONU that is 1km away reaches the OLT, and the end time of the quiet window corresponds to the distance.
  • the time when the uplink signal sent by the ONU for 2km reaches the OLT.
  • the OLT completes the ranging of ONUs with a distance of 1km to 2km, 2km to 3km ... (L-1) km to Lkm, so that all ONUs complete registration.
  • the quiet windows opened each time by the OLT do not overlap.
  • the quiet windows that are opened differently may be partially overlapped, such as the first opening of a distance of 0km to 1.2km, and the second opening 1km to 2.2km and so on.
  • the ONU to be registered sends an uplink signal to the OLT at a low rate and low optical power
  • the content is the ONU's identity information (serial number information or media access address information) and delay information D for sending the message.
  • the ONU can send the above signal to the OLT once, or it can send multiple uplink signals to the OLT.
  • the delay information D contained in each uplink signal is a time delay between the start time Ts in the uplink bandwidth allocated by the OLT to the ONU and the time when the ONU actually sends the uplink signal.
  • the distance between the furthest ONU supported in the PON system and the OLT is set to L, for example, L is 20km.
  • the quiet window opened by the OLT for the ONU to register is divided into L.
  • the OLT is opened several Small discontinuous quiet windows, for example: open N discontinuous 10us quiet windows.
  • the start time of the first quiet window corresponds to the time when the upstream signal sent by the ONU that is 0km from itself reaches the OLT, and the end of the quiet window
  • the time corresponds to the time when the uplink signal sent by the ONU that is 1km away reaches the OLT
  • the second 10us quiet window the start time corresponds to the time when the uplink signal sent by the ONU that is 5km away reaches the OLT
  • the end time of the quiet window corresponds The time when the uplink signal sent by the ONU that is 6km away from it reaches the OLT
  • the fourth 10us quiet window the start time corresponds to the time when the uplink signal sent by the ONU that is 15km away from it reaches the OLT
  • the end time corresponds to The time when the uplink signal sent by the ONU that is 16km away reaches the OLT.
  • the OLT continues to open several discontinuous small quiet windows.
  • the start time of the first 10us quiet window corresponds to the time when the upstream signal sent by the ONU that is 1km away reaches the OLT
  • the end time of the quiet window corresponds to The time when the uplink signal sent by the ONU that is 2km away reaches the OLT
  • the second 10us quiet window the start time corresponds to the time when the uplink signal sent by the ONU that is 6km away reaches the OLT
  • the end time of the quiet window corresponds to the distance The time when the uplink signal sent by the ONU of 7km reaches the OLT
  • the fourth 10us quiet window the start time corresponds to the time when the uplink signal sent by the ONU of 16km from itself reaches the OLT
  • the end time corresponds to the distance from itself The time when the uplink signal sent by the ONU of 17km reaches the OLT.
  • the OLT repeats the above steps to ensure that all distances supported by the PON system are covered.
  • the OLT and ONU use the following main steps to send and receive data.
  • Step 1 The OLT sends a broadcast message to the ONU at time T1.
  • the content of the message is to allocate an uplink bandwidth to the ONU to be registered, and the start time of sending uplink data allocated to the ONU in the uplink bandwidth is Ts.
  • the OLT opens several small quiet windows, for example, four 10us quiet windows.
  • the start time of the first quiet window corresponds to the time when the uplink signal sent by the ONU that is 0 km away reaches the OLT
  • the end time of the quiet window corresponds to The time when the uplink signal sent by the ONU that is 1km away reaches the OLT
  • the start time of the second quiet window corresponds to the time when the uplink signal sent by the ONU that is 5km away reaches the OLT
  • the end time of the quiet window corresponds to the distance itself
  • the start time of the third quiet window corresponds to the time when the uplink signal sent by the ONU that is 10km away reaches the OLT
  • the end time of the quiet window corresponds to the ONU that is 11km away
  • the start time of the fourth quiet window corresponds to the time when the uplink signal sent by the ONU that is 15km away reaches the OLT
  • the end time of the quiet window corresponds to the uplink sent by the ONU
  • Step 2 The ONU to be registered sends an uplink signal to the OLT at a low rate and low optical power, and the content is the identity information (serial number information or media access address information) of the ONU and the delay information D for sending the message.
  • Step 3 The OLT receives the uplink signal of the ONU in all the quiet windows opened above. If the OLT receives the uplink signal sent by the ONU in step 2 at time T2, the OLT calculates the loop delay value of the ONU as T2-T1- Ts-D, OLT calculates that the ONU's fiber distance L from itself is C * (T2-T1-Ts-D) / 2, where C is the speed of light of the signal light in the fiber.
  • the OLT After the OLT completes the initial ranging of the ONU, the OLT sends the allocated uplink bandwidth to the ONU at time T3.
  • the start time allocated to the ONU is Tss, and the OLT estimates that the ONU adopts the ONU's preliminary ranging results
  • the OLT further opens an equal or smaller quiet window (for example, 5us) including the above arrival time.
  • Step 4 After the ONU receives the bandwidth allocation of the OLT in step 3, the ONU sends the uplink signal to the OLT at the time Tss using the normal data transmission rate and normal optical power of the current PON system.
  • Step 5 The OLT receives the data sent by the ONU in step 4 at time T4, and the OLT completes accurate ranging of the ONU at a normal rate, and the loop delay is T4-T3-Tss.
  • the OLT receives uplink signals from multiple ONUs in step 3, the OLT and each corresponding ONU perform steps 3 to 5 to complete ranging.
  • the OLT repeats the above steps.
  • the second open quiet window is: four 10us quiet windows.
  • the start time of the first quiet window corresponds to the time when the upstream signal sent by the ONU that is 1km away from the OLT reaches the end of the quiet window.
  • the time corresponds to the time when the uplink signal sent by the ONU that is 2km away reaches the OLT;
  • the start time of the second quiet window corresponds to the time when the uplink signal sent by the ONU that is 6km away reaches the OLT, and the end time of the quiet window corresponds to The time when the uplink signal sent by the ONU that is 7km away reaches the OLT;
  • the start time of the third quiet window corresponds to the time when the uplink signal sent by the ONU that is 11km away reaches the OLT;
  • the end time of the quiet window corresponds to the distance itself: The time when the uplink signal sent by the ONU of 12km reaches the OLT;
  • the start time of the fourth quiet window corresponds to the
  • the quiet windows opened each time by the OLT do not overlap.
  • the quiet windows that are opened differently may be partially overlapped, such as the first opening of a distance of 0km to 1.2km, and the second opening 1km to 2.2km.
  • the ONU to be registered sends an uplink signal to the OLT at a low rate and low optical power
  • the content is the identity information (serial number information or media access address information) of the ONU and the delay information D for sending the message.
  • the ONU can send the above signal to the OLT once, or it can send multiple uplink signals to the OLT.
  • the delay information D contained in each uplink signal is a time delay between the start time Ts in the uplink bandwidth allocated by the OLT to the ONU and the time when the ONU actually sends the uplink signal.
  • the OLT opens quiet windows to ONUs of different distance ranges by turns.
  • the ONU responds to the registered bandwidth allocation of the OLT with a low-rate low-power signal, and the OLT completes the ranging of the ONU.
  • the impact of the quiet window in the prior art on the low-latency service is solved.
  • the OLT opens a quiet window corresponding to a specific range to register with the corresponding ONU, ensuring low latency requirements for transmission services on the uplink.
  • An embodiment of the present disclosure further provides a computer-readable storage medium on which a computer program is stored.
  • the processor When the computer program is executed by a processor, the processor performs communication of the optical network or ranging of the optical network according to the embodiments of the present disclosure. method.
  • the storage medium may be configured to store a computer program for performing the following steps: In S1, the OLT sends a broadcast message to the ONU, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU; in S2 In S3, the OLT opens a quiet window for ONUs in a predetermined area. In S3, the OLT receives the uplink signal sent by the ONU in the quiet window.
  • the computer-readable storage medium may include, but is not limited to, a USB flash drive, a read-only memory (ROM), and a random access memory (RAM) , Removable hard disks, magnetic disks, or compact discs, which can store computer programs.
  • An embodiment of the present disclosure further provides an electronic device including a memory and a processor, where the computer program is stored, and the processor is configured to run the computer program to perform communication or optical communication of the optical network according to the embodiments of the present disclosure.
  • Network ranging method
  • the electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the processor, and the input-output device is connected to the processor.
  • the processor may be configured to execute the following steps through a computer program: In S1, the OLT sends a broadcast message to the ONU, where the broadcast message is used to indicate an uplink bandwidth allocated to the ONU; in S2, the OLT Open a quiet window for ONUs in a predetermined area; in S3, the OLT receives the uplink signal sent by the ONU in the quiet window.
  • modules or steps of the present disclosure may be implemented by a general-purpose computing device, and they may be centralized on a single computing device or distributed on a network composed of multiple computing devices. Above, optionally, they may be implemented with program code executable by a computing device, so that they may be stored in a storage device and executed by the computing device, and in some cases, may be in a different order than here
  • the steps shown or described are performed either by making them into individual integrated circuit modules or by making multiple modules or steps into a single integrated circuit module. As such, the present disclosure is not limited to any particular combination of hardware and software.

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Abstract

本公开提供了一种光网络的测距方法、通信方法、OLT、ONU、光网络系统。OLT向ONU发送广播消息，该广播消息用于指示为ONU分配的上行带宽；OLT为预定区域的ONU开放安静窗口；以及OLT在安静窗口接收ONU发送的上行信号。

Description

光网络的测距方法、通信方法、OLT、ONU、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
随着网络技术的发展，可以利用网络传输大量的语音、数据、视频等业务，因此对带宽的要求不断提高，无源光网络(Passive Optical Network，PON)就是在这种需求下产生的。
图1是相关技术中的PON系统的拓扑结构图，如图1所示，PON系统通常由局侧的光线路终端(Optical Line Terminal，OLT)、用户侧的光网络单元(Optical Network Unit，ONU)和光分配网络(Optical Distribution Network，ODN)组成，通常采用点到多点的网络结构。ODN由单模光纤、分光器和光连接器等无源光器件组成，为OLT和ONU之间的物理连接提供光传输媒质。目前，虚拟现实业务和5G无线业务等低时延业务的发展，对PON提出了低时延需求。
发明内容
根据本公开实施例的一个方面，提供了一种光网络的测距方法，包括：OLT广播第一消息，第一消息中携带有OLT为位于距离OLT的指定距离范围内的待注册ONU分配的第一上行带宽以及指示待注册ONU发送第一上行信号的第一发送时间；OLT开放与指定距离范围对应的第一安静窗口；其中，第一安静窗口的起始时刻不晚于指定距离范围内的与OLT距离最小的ONU在第一发送时间发送的光信号到达OLT的时刻，第一安静窗口的终止时刻不早于指定距离范围内的与OLT距离最大的ONU在第一发送时间发送的光信号到达OLT的时刻；在第一安静窗口内，OLT接收待注册ONU在第一上行带宽上发送的第一上行信号，第一上行信号中携带有待注册ONU的时延信息，时延信息为待注册ONU实际发送第一上行信号的时间与第一发送时间之间的时间延迟信息；以及OLT根据广播第一消息的第一时刻、第一发送 时间、时延信息以及接收第一上行信号的第二时刻，估计待注册ONU与OLT之间的第一距离。
根据本公开实施例的又一个方面，提供了另一种光网络的测距方法，包括：待注册ONU接收OLT广播的第一消息；其中，待注册ONU位于距离OLT的指定距离范围内，且第一消息中携带有OLT为待注册ONU分配的第一上行带宽以及指示待注册ONU发送第一上行信号的第一发送时间；以及待注册ONU在第一上行带宽上向OLT发送第一上行信号；其中，第一上行信号中携带有待注册ONU的时延信息，时延信息为待注册ONU实际发送第一上行信号的时间与第一发送时间之间的时间延迟信息，以使得OLT在开放的第一安静窗口内接收第一上行信号，并根据OLT广播第一消息的第一时刻、第一发送时间、时延信息以及OLT接收第一上行信号的第二时刻，估计待注册ONU与OLT之间的第一距离；其中，与指定距离范围对应的第一安静窗口的起始时刻不晚于指定距离范围内的与OLT距离最小的ONU在第一发送时间发送的光信号到达OLT的时刻，第一安静窗口的终止时刻不早于指定距离范围内的与OLT距离最大的ONU在第一发送时间发送的光信号到达OLT的时刻。
根据本公开实施例的再一个方面，提供了一种光网络的通信方法，应用在OLT，包括：向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；为预定区域的ONU开放安静窗口；以及在安静窗口接收ONU发送的上行信号。
根据本公开实施例的另一个方面，提供了另一种光网络的通信方法，应用在ONU，包括：接收OLT发送的广播消息，其中，广播消息用于指示为ONU分配的上行带宽；以及，向OLT发送带外的上行信号。
根据本公开实施例的再一个方面，提供了一种OLT，包括：发送模块，配置为向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；开放模块，配置为为预定区域的ONU开放安静窗口；以及接收模块，配置为在安静窗口接收ONU发送的上行信号。
根据本公开实施例的再一个方面，提供了一种ONU，包括：接收 模块，配置为接收OLT发送的广播消息，其中，广播消息用于指示为ONU分配的上行带宽；以及发送模块，配置为向OLT发送上行信号。
根据本公开实施例的再一个方面，提供了一种光网络系统，包括OLT以及ONU，其中，OLT，配置为向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；为预定区域的ONU开放安静窗口；以及在安静窗口接收ONU发送的上行信号；ONU，配置为接收OLT发送的广播消息，其中，广播消息用于指示为ONU分配的上行带宽；以及向OLT发送上行信号。
根据本公开实施例的再一个方面，提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被设置为运行时执行上述任一方面提供的光网络的测距方法或光网络的通信方法。
根据本公开实施例的再一个方面，提供一种电子装置，包括存储器和处理器，存储器中存储有计算机程序，处理器被设置为运行计算机程序以执行上述任一方面提供的光网络的测距方法或光网络的通信方法。
附图说明
图1为相关技术中的PON系统的拓扑结构图。
图2为根据本公开实施例的一种光网络的通信方法的一种流程示意图。
图3为根据本公开实施例的另一种光网络的通信方法的一种流程示意图。
图4为根据本公开实施例的OLT的结构示意图。
图5为根据本公开实施例的ONU的结构示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开的说明书和权利要求书及上述附图中的 术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
相关技术中，在ONU注册阶段，OLT需要对待注册的ONU进行测距，由于OLT事先并不知道待注册的ONU距离自己的距离，所以OLT开放的用于测距的安静窗口的大小覆盖了PON系统支持的最小距离到最大距离，最大距离与最小距离的距离差是20km或者40km。支持20km差分距离的PON系统，标准中推荐最近ONU和最远ONU的环路时延差值为200μs，ONU的响应时间差值为2μs，ONU最大随机时延为48μs，因此推荐的安静窗口的大小为250μs。支持40km差分距离的PON系统，标准中推荐最近ONU和最远ONU的环路时延差值为400μs，ONU的响应时间差值为2μs，ONU最大随机时延为48μs，因此推荐的安静窗口的大小为450μs。在OLT开放安静窗口期间，OLT不给已经完成注册的ONU分配上行带宽，所以在安静窗口对应的时间内，完成注册的ONU不能发送上行数据；如果系统中有完成注册的传输低时延业务的ONU，由于较大的安静窗口会导致低延时业务的延迟发送，因此，该传输低时延业务ONU不能忍受PON系统开放较大的安静窗口。而在相关的PON系统中，OLT会定期开放安静窗口用于ONU注册，因此导致PON系统不能解决低时延业务的低时延需求。
有鉴于此，本公开实施例提供了一种光网络的通信方法，该方法可应用于如图1所示的光网络架构上。图2为根据本公开实施例提供的一种光网络的通信方法的一种流程示意图，该方法可包括步骤S202-步骤S206。
在步骤S202中，OLT向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽。
在步骤S204中，OLT为预定区域的ONU开放安静窗口。
在步骤S206中，OLT在安静窗口接收ONU发送的上行信号。
根据本公开提供的实施例，为预定区域的ONU开放安静窗口，安静窗口对应预定区域内的ONU，解决了相关技术中开放安静窗口导致时延过大的技术问题，保证了链路上传输业务的低时延需求。
根据本公开提供的实施例，上述步骤的执行主体可以为OLT，但 不限于OLT。
根据本公开提供的实施例，为预定区域的ONU开放安静窗口包括：在一个预设周期内为多个预定区域的ONU开放多个对应的安静窗口，其中，一个预定区域对应的一个安静窗口，或者多个预定区域对应的多个不相邻的安静窗口。
根据本公开提供的实施例，OLT向ONU发送广播消息为OLT的带宽分配过程。
根据本公开提供的实施例，为预定区域的ONU开放安静窗口包可括：为预定区域的ONU在一个或多个预设周期内开放重叠的安静窗口。
根据本公开提供的实施例，相邻预定区域的边界重叠，或者相邻预定区域的边界不重叠。
根据本公开提供的实施例，广播消息还用于指示ONU使用带外信号响应上行带宽，带宽分配可以是低速率低光功率的上行信号。带外信号(out-of-band signal)是指通过不同的物理通道传送控制信息和数据信息，两者完全独立，互不影响，本实施例中指不同于传输数据信息的物理通道。
根据本公开提供的实施例，安静窗口的起始时刻为预定区域内的最小距离的ONU发送上行信号到达OLT的时刻，安静窗口的终止时刻为预定区域内的最大距离的ONU发送上行信号到达OLT的时刻。
根据本公开提供的实施例，在安静窗口接收ONU发送的上行信号包括：安静窗口接收ONU发送的注册消息，其中，注册消息携带ONU的身份信息和/或发送注册消息的时延信息。之后，可以根据时延信息对ONU进行测距。
根据本公开提供的实施例，预定区域为PON系统中ONU到OLT之间的光纤距离。预定区域是在地理范围内划分的区域，OLT通过光纤与ONU连接，根据OLT与ONU之间的传输时间，将不同传输时间的ONU划分为不同的区域，相同的区域内，与OLT的光纤传输时间范围相同(如都是8us至10us的范围)。
本公开实施例提供了另一种光网络的通信方法，该方法可应用 于如图1所示的光网络架构上。图3为根据本公开实施例提供的另一种光网络的通信方法的一种流程示意图，该方法可包括步骤S302和步骤S304。
在步骤S302中，ONU接收OLT发送的广播消息，其中，广播消息用于指示为ONU分配的上行带宽。
在步骤S304中，ONU向OLT发送带外的上行信号。
根据本公开提供的实施例，向OLT发送带外的上行信号可包括：采用低速率低光功率向OLT发送注册消息，其中，注册消息携带ONU的身份信息和/或发送注册消息的时延信息。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例所述的方法。
在本实施例中还提供了一种光网络的通信装置，该装置可以是OLT或ONU，分别用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
如图4所示，其为根据本公开实施例提供的OLT的结构示意图，该OLT可包括：发送模块40，配置为向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；开放模块42，配置为为预定区域的ONU开放安静窗口；以及，接收模块44，用于在安静窗口接收ONU发送的上行信号。
如图5所示，其为根据本公开实施例提供的ONU的结构示意图，该ONU可包括：接收模块50，配置为接收OLT发送的广播消息，其 中，广播消息用于指示为ONU分配的上行带宽；以及发送模块52，配置为向OLT发送上行信号。
本公开实施例还提供了一种光网络的通信系统，可包括如图4所示的OLT和如图5所示的ONU。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
下面通过具体实例对本公开实施例进行详细说明。
实例一
在本实例中，PON系统中支持的最远的ONU和OLT之间的距离设为L，例如L为20km，OLT给ONU开放的用于注册的安静窗口分成了L个，首先OLT开放一个小的安静窗口，例如10us的安静窗口，安静窗口的开始时间对应于距离自己为0km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻；OLT在隔一段时间后，开放第二个10us安静窗口，开始时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为2km的ONU发送的上行信号到达OLT的时刻；以此类推，OLT在隔一段时间后，开放第L个10us安静窗口，开始时间对应于距离自己为19km的ONU发送的上行信号到达OLT的时刻，结束时间对应于距离自己为20km的ONU发送的上行信号到达OLT的时刻。
OLT和ONU采用下面的主要步骤发送数据和接收数据。
步骤1：OLT在T1时刻给ONU发送广播消息，消息内容为给待注册的ONU分配一个上行带宽，上行带宽中给ONU分配的发送上行数据的开始时间为Ts。OLT开放一个小的安静窗口，例如10us的安静窗口，安静窗口的开始时间对应于距离自己为0km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻。
步骤2：待注册的ONU采用低速率(例如几十到一百兆每秒的速 率)低光功率(例如-30dBm左右)发送上行信号给OLT，内容为ONU的身份信息(序列号信息或者媒质接入地址信息)和发送该消息的时延信息D。
步骤3：OLT在T2时刻收到ONU在步骤2中发送的上行信号，OLT计算该ONU的环路时延值为T2-T1-Ts-D,OLT计算出该ONU距离自己的光纤距离L为C*(T2-T1-Ts-D)/2，其中C为信号光在光纤中的光速。
OLT完成对该ONU的初步测距后，OLT在T3时刻给该ONU发送分配的上行带宽，上行带宽中，给ONU分配的开始时间为Tss，并且OLT根据该ONU的初步测距结果估计ONU采用PON系统传输数据的正常速率后上行数据到达OLT的时间，OLT进一步开放相等的或者更小的包括上述到达时间的安静窗口(例如5us)。
步骤4：ONU收到OLT在步骤三中的带宽分配后，ONU使用当前PON系统传输数据的正常速率和正常光功率在时刻Tss发送上行信号给OLT。
步骤5：OLT在T4时刻收到ONU在步骤4中发送的数据，OLT完成对该ONU在正常速率下的精确测距，环路时延为T4-T3-Tss。
OLT重复上述步骤，第二次开放的安静窗口为：例如10us的安静窗口，安静窗口的开始时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为2km的ONU发送的上行信号到达OLT的时刻。采用上述方法，OLT完成对距离自己为1km到2km、2km到3km……(L-1)km到L km的ONU的测距，使得所有ONU完成注册。
在本实例中，OLT每次开放的安静窗口不重叠，在其它实施例中，OLT也可以采用不同次开放的安静窗口有部分重叠，比如第一次开放0km到1.2km距离，第二次开放1km到2.2km等。
在本实施例中，待注册的ONU采用低速率低光功率发送上行信号给OLT，内容为ONU的身份信息(序列号信息或者媒质接入地址信息)和发送该消息的时延信息D。ONU可以发送一次上述信号给OLT，也可以发送多个上行信号给OLT。每个上行信号中包含的时延信息D 为OLT分配给ONU的上行带宽中的开始时间Ts和该ONU实际发送上行信号的时间之间的时间延迟。
实例二
在本实例中，PON系统中支持的最远的ONU和OLT之间的距离设为L，例如L为20km，OLT给ONU开放的用于注册的安静窗口分成了L个，首先OLT开放几个不连续的小的安静窗口，例如：开放N个不连续的10us的安静窗口，第一个安静窗口的开始时间对应于距离自己为0km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻；第二个10us安静窗口，开始时间对应于距离自己为5km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为6km的ONU发送的上行信号到达OLT的时刻；以此类推，第4个10us安静窗口，开始时间对应于距离自己的15km的ONU发送的上行信号到达OLT的时刻，结束时间对应于距离自己为16km的ONU发送的上行信号到达OLT的时刻。然后，OLT继续开放几个不连续的小的安静窗口，例如：第一个10us的安静窗口的开始时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为2km的ONU发送的上行信号到达OLT的时刻；第二个10us安静窗口，开始时间对应于距离自己为6km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为7km的ONU发送的上行信号到达OLT的时刻；以此类推，第4个10us安静窗口，开始时间对应于距离自己的16km的ONU发送的上行信号到达OLT的时刻，结束时间对应于距离自己为17km的ONU发送的上行信号到达OLT的时刻。
OLT重复上述步骤，保证覆盖PON系统支持的所有距离。
OLT和ONU采用下面的主要步骤发送数据和接收数据。
步骤1：OLT在T1时刻给ONU发送广播消息，消息内容为给待注册的ONU分配一个上行带宽，上行带宽中给ONU分配的发送上行数据的开始时间为Ts。OLT开放几个小的安静窗口，例如，4个10us的安静窗口，第一个安静窗口的开始时间对应于距离自己为0km的 ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻；第二个安静窗口的开始时间对应于距离自己为5km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为6km的ONU发送的上行信号到达OLT的时刻；第三个安静窗口的开始时间对应于距离自己为10km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为11km的ONU发送的上行信号到达OLT的时刻，第四个安静窗口的开始时间对应于距离自己为15km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为16km的ONU发送的上行信号到达OLT的时刻。
步骤2：待注册的ONU采用低速率低光功率发送上行信号给OLT，内容为ONU的身份信息(序列号信息或者媒质接入地址信息)和发送该消息的时延信息D。
步骤3：OLT在上述所开放的所有安静窗口接收ONU的上行信号，如果OLT在T2时刻收到ONU在步骤2中发送的上行信号，OLT计算该ONU的环路时延值为T2-T1-Ts-D,OLT计算出该ONU距离自己的光纤距离L为C*(T2-T1-Ts-D)/2，其中C为信号光在光纤中的光速。
OLT完成对该ONU的初步测距后，OLT在T3时刻给该ONU发送分配的上行带宽，上行带宽中，给ONU分配的开始时间为Tss，并且OLT根据该ONU的初步测距结果估计ONU采用PON系统传输数据的正常速率后上行数据到达OLT的时间，OLT进一步开放相等的或者更小的包括上述到达时间的安静窗口(例如5us)。
步骤4：ONU收到OLT在步骤三中的带宽分配后，ONU使用当前PON系统传输数据的正常速率和正常光功率在时刻Tss发送上行信号给OLT。
步骤5：OLT在T4时刻收到ONU在步骤4中发送的数据，OLT完成对该ONU在正常速率下的精确测距，环路时延为T4-T3-Tss。
如果OLT在步骤3中收到多个ONU的上行信号，OLT和每个对应的ONU都进行步骤3到步骤5的步骤，完成测距。
OLT重复上述步骤，第二次开放的安静窗口为：4个10us的安 静窗口，第一个安静窗口的开始时间对应于距离自己为1km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为2km的ONU发送的上行信号到达OLT的时刻；第二个安静窗口的开始时间对应于距离自己为6km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为7km的ONU发送的上行信号到达OLT的时刻；第三个安静窗口的开始时间对应于距离自己为11km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为12km的ONU发送的上行信号到达OLT的时刻；第四个安静窗口的开始时间对应于距离自己为16km的ONU发送的上行信号到达OLT的时刻，安静窗口的结束时间对应于距离自己为17km的ONU发送的上行信号到达OLT的时刻。采用上述方法，OLT完成对距离自己为0到L的所有ONU的测距，使得所有ONU完成注册。
在本实例中，OLT每次开放的安静窗口不重叠，在其它实施例中，OLT也可以采用不同次开放的安静窗口有部分重叠，比如第一次开放0km到1.2km距离，第二次开放1km到2.2km。
在本实例中，待注册的ONU采用低速率低光功率发送上行信号给OLT，内容为ONU的身份信息(序列号信息或者媒质接入地址信息)和发送该消息的时延信息D。ONU可以发送一次上述信号给OLT，也可以发送多个上行信号给OLT。每个上行信号中包含的时延信息D为OLT分配给ONU的上行带宽中的开始时间Ts和该ONU实际发送上行信号的时间之间的时间延迟。
使用本实施例的方案，OLT通过轮流给不同距离范围的ONU开放安静窗口，ONU在注册过程中采用低速率低光功率的信号响应OLT的注册的带宽分配，OLT完成对上述ONU的测距。解决了现有技术中的安静窗口对低时延业务的影响。OLT开放对应特定范围的安静窗口给对应的ONU进行注册，保证上行链路上传输业务的低时延需求。
本公开实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，计算机程序被处理器执行时，处理器执行根据本公开各实施例的光网络的通信或光网络的测距方法。
根据本公开实施例，上述存储介质可以被设置为存储用于执行 以下步骤的计算机程序：在S1中，OLT向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；在S2中，OLT为预定区域的ONU开放安静窗口；在S3中，OLT在安静窗口接收ONU发送的上行信号。
根据本公开提供的实施例，上述计算机可读存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。
本公开实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行根据本公开各实施例的光网络的通信或光网络测距方法。
根据本公开提供的实施例，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。
根据本公开实施例，上述处理器可以被设置为通过计算机程序执行以下步骤：在S1中，OLT向ONU发送广播消息，其中，广播消息用于指示为ONU分配的上行带宽；在S2中，OLT为预定区域的ONU开放安静窗口；在S3中，OLT在安静窗口接收ONU发送的上行信号。
本公开实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，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，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。
以上所述仅为本公开的优选实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本 公开的原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (22)

  1. 一种光网络的测距方法，包括：
    光线路终端OLT广播第一消息，所述第一消息中携带有所述OLT为位于距离所述OLT的指定距离范围内的待注册光网络单元ONU分配的第一上行带宽以及指示所述待注册ONU发送第一上行信号的第一发送时间；
    所述OLT开放与所述指定距离范围对应的第一安静窗口；其中，所述第一安静窗口的起始时刻不晚于所述指定距离范围内的与所述OLT距离最小的ONU在所述第一发送时间发送的光信号到达所述OLT的时刻，所述第一安静窗口的终止时刻不早于所述指定距离范围内的与所述OLT距离最大的ONU在所述第一发送时间发送的光信号到达所述OLT的时刻；
    在所述第一安静窗口内，所述OLT接收所述待注册ONU在所述第一上行带宽上发送的所述第一上行信号，所述第一上行信号中携带有所述待注册ONU的时延信息，所述时延信息为所述待注册ONU实际发送所述第一上行信号的时间与所述第一发送时间之间的时间延迟信息；以及
    所述OLT根据广播所述第一消息的第一时刻、所述第一发送时间、所述时延信息以及接收所述第一上行信号的第二时刻，估计所述待注册ONU与所述OLT之间的第一距离。
  2. 根据权利要求1所述的方法，在所述OLT估计所述待注册ONU与所述OLT之间的所述第一距离之后，还包括：
    所述OLT向所述待注册ONU发送第二消息，所述第二消息中携带有所述OLT为所述待注册ONU分配的第二上行带宽以及指示所述待注册ONU发送第二上行信号的第二发送时间；
    所述OLT根据所述第一距离开放第二安静窗口；其中，所述第二安静窗口的起始时刻不晚于所述待注册ONU在所述第二发送时间发送的所述第二上行信号到达所述OLT的时刻，所述第二安静窗口的终止时刻不早于所述待注册ONU在所述第二发送时间发送的所述第二上行信号到达所述OLT的时刻；
    在所述第二安静窗口内，所述OLT接收所述待注册ONU根据所述第二发送时间在所述第二上行带宽上发送的所述第二上行信号；以及
    所述OLT根据发送所述第二消息的第三时刻、所述第二发送时间以及接收所述第二上行信号的第四时刻，计算所述待注册ONU与所述OLT之间的第二距离。
  3. 根据权利要求1或2所述的方法，其中，所述第一上行信号或所述第二上行信号中还携带有所述待注册ONU的身份信息；以及
    所述方法还包括：
    所述OLT根据所述待注册ONU的所述身份信息对所述待注册ONU进行注册。
  4. 一种光网络的测距方法，包括：
    待注册光网络单元ONU接收光线路终端OLT广播的第一消息；其中，所述待注册ONU位于距离所述OLT的指定距离范围内，且所述第一消息中携带有所述OLT为所述待注册ONU分配的第一上行带宽以及指示所述待注册ONU发送第一上行信号的第一发送时间；以及
    所述待注册ONU在所述第一上行带宽上向所述OLT发送所述第一上行信号；其中，所述第一上行信号中携带有所述待注册ONU的时延信息，所述时延信息为所述待注册ONU实际发送所述第一上行信号的时间与所述第一发送时间之间的时间延迟信息，以使得所述OLT在开放的第一安静窗口内接收所述第一上行信号，并根据所述OLT广播所述第一消息的第一时刻、所述第一发送时间、所述时延信息以及所述OLT接收所述第一上行信号的第二时刻，估计所述待注册ONU与所述OLT之间的第一距离；
    其中，与所述指定距离范围对应的所述第一安静窗口的起始时刻不晚于所述指定距离范围内的与所述OLT距离最小的ONU在所述第一发送时间发送的光信号到达所述OLT的时刻，所述第一安静窗口的终止时刻不早于所述指定距离范围内的与所述OLT距离最大的ONU在所述第一发送时间发送的光信号到达所述OLT的时刻。
  5. 根据权利要求4所述的方法，在所述待注册ONU在所述第一 上行带宽上向所述OLT发送所述第一上行信号之后，还包括：
    所述待注册ONU接收所述OLT发送的第二消息，所述第二消息中携带有所述OLT为所述待注册ONU分配的第二上行带宽以及指示所述待注册ONU发送第二上行信号的第二发送时间；以及
    所述待注册ONU根据所述第二发送时间，在所述第二上行带宽上向所述OLT发送所述第二上行信号，以使得所述OLT在根据所述第一距离开放的第二安静窗口内，接收所述第二上行信号，并根据所述OLT发送所述第二消息的第三时刻、所述第二发送时间以及所述OLT接收所述第二上行信号的第四时刻，计算所述待注册ONU与所述OLT之间的第二距离；
    其中，所述第二安静窗口的起始时刻不晚于所述待注册ONU在所述第二发送时间发送的所述第二上行信号到达所述OLT的时刻，所述第二安静窗口的终止时刻不早于所述待注册ONU在所述第二发送时间发送的所述第二上行信号到达所述OLT的时刻。
  6. 根据权利要求5所述的方法，其中，
    所述待注册ONU在所述第一上行带宽上向所述OLT发送所述第一上行信号，包括：所述待注册ONU采用低速率和低光功率在所述第一上行带宽上向所述OLT发送所述第一上行信号；和/或
    所述待注册ONU根据所述第二发送时间，在所述第二上行带宽上向所述OLT发送所述第二上行信号，包括：所述待注册ONU在所述第二发送时间，采用正常速率和正常光功率在所述第二上行带宽上向所述OLT发送所述第二上行信号。
  7. 根据权利要求4-6任一所述的方法，其中，所述第一上行信号或所述第二上行信号中还携带有所述待注册ONU的身份信息，以由所述OLT根据所述待注册ONU的所述身份信息对所述待注册ONU进行注册。
  8. 一种光网络的通信方法，应用在光线路终端OLT，包括：
    向光网络单元ONU发送广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；
    为预定区域的ONU开放安静窗口；以及
    在所述安静窗口接收所述ONU发送的上行信号。
  9. 根据权利要求8所述的方法，其中，为预定区域的ONU开放安静窗口包括以下之一：
    在一个预设周期内为多个预定区域的ONU开放多个对应的安静窗口，其中，一个预定区域对应的一个安静窗口；
    多个预定区域对应的多个不相邻的安静窗口。
  10. 根据权利要求8所述的方法，其中，为预定区域的ONU开放安静窗口包括以下之一：
    为预定区域的ONU在一个或多个预设周期内开放重叠的安静窗口。
  11. 根据权利要求8所述的方法，其中，相邻预定区域的边界重叠，或者相邻预定区域的边界不重叠。
  12. 根据权利要求8所述的方法，其中，所述广播消息还用于指示ONU使用带外信号响应所述上行带宽。
  13. 根据权利要求8所述的方法，其中，所述安静窗口的起始时刻为所述预定区域内的最小距离的ONU发送上行信号到达光线路终端OLT的时刻，所述安静窗口的终止时刻为所述预定区域内的最大距离的ONU发送上行信号到达OLT的时刻。
  14. 根据权利要求8所述的方法，其中，在所述安静窗口接收所述ONU发送的上行信号包括：
    在所述安静窗口接收所述ONU发送的注册消息，其中，所述注册消息携带所述ONU的身份信息和/或发送所述注册消息的时延信息；以及
    对所述ONU进行测距。
  15. 根据权利要求8所述的方法，其中，所述预定区域为无源光网络PON系统中ONU到OLT之间的光纤距离。
  16. 一种光网络的通信方法，应用在光网络单元ONU，包括：
    接收光线路终端OLT发送的广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；以及
    向所述OLT发送带外的上行信号。
  17. 根据权利要求16所述的方法，其中，向所述OLT发送带外的上行信号包括：
    采用低速率低光功率向所述OLT发送注册消息，其中，所述注册消息携带所述ONU的身份信息和/或发送所述注册消息的时延信息。
  18. 一种光线路终端OLT，包括：
    发送模块，配置为向光网络单元ONU发送广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；
    开放模块，配置为为预定区域的ONU开放安静窗口；以及
    接收模块，配置为在所述安静窗口接收所述ONU发送的上行信号。
  19. 一种光网络单元ONU，包括：
    接收模块，配置为接收光线路终端OLT发送的广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；以及
    发送模块，配置为向所述OLT发送上行信号。
  20. 一种光网络系统，包括光线路终端OLT以及光网络单元ONU，其中，
    所述OLT，配置为向所述ONU发送广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；为预定区域的ONU开放安静窗口；以及在所述安静窗口接收所述ONU发送的上行信号；
    所述ONU，配置为接收所述OLT发送的广播消息，其中，所述广播消息用于指示为ONU分配的上行带宽；以及向所述OLT发送上行信号。
  21. 一种计算机可读存储介质，存储有计算机程序，其中，所述计算机程序被设置为运行时执行所述权利要求1至17任一项中所述的方法。
  22. 一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行所述权利要求1至17任一项中所述的方法。
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Publication number Priority date Publication date Assignee Title
US20230142562A1 (en) * 2020-04-14 2023-05-11 Nippon Telegraph And Telephone Corporation Optical communication system and master station
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394229A (zh) * 2007-09-21 2009-03-25 日立通讯技术株式会社 无源光网络系统和测距方法
WO2011060734A1 (zh) * 2009-11-23 2011-05-26 中兴通讯股份有限公司 在无源光网络中测距的方法和装置
CN102883234A (zh) * 2011-07-15 2013-01-16 上海贝尔股份有限公司 一种以太网无源光网络中的光网络单元注册方法及装置
US20170279527A1 (en) * 2016-03-28 2017-09-28 Electronics And Telecommunications Research Institute Method and apparatus for setting quiet window in passive optical network system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014071309A2 (en) * 2012-11-05 2014-05-08 Huawei Technologies Co., Ltd. System and method for passive optical network communication
US9048946B1 (en) * 2014-03-03 2015-06-02 Calix, Inc. Hybrid ranging using an out of band signal in optical networks
CN105830369B (zh) * 2014-07-29 2018-09-21 华为技术有限公司 以太网无源光网络系统中设备注册和波长切换的方法和装置
EP3116234B1 (en) * 2015-07-09 2018-08-29 Mitsubishi Electric R&D Centre Europe B.V. Method for transmitting signalling information with reduced identfiying information in an optical communications network
CN106878836B (zh) * 2015-12-14 2019-07-26 中兴通讯股份有限公司 带宽调度方法、onu注册方法、装置及olt
CN107342973B (zh) * 2016-05-03 2021-07-20 中兴通讯股份有限公司 一种无源光网络的注册方法、装置和无源光网络系统
EP3550742B1 (en) 2018-04-03 2020-07-15 Nokia Solutions and Networks Oy Optical network unit activation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394229A (zh) * 2007-09-21 2009-03-25 日立通讯技术株式会社 无源光网络系统和测距方法
WO2011060734A1 (zh) * 2009-11-23 2011-05-26 中兴通讯股份有限公司 在无源光网络中测距的方法和装置
CN102883234A (zh) * 2011-07-15 2013-01-16 上海贝尔股份有限公司 一种以太网无源光网络中的光网络单元注册方法及装置
US20170279527A1 (en) * 2016-03-28 2017-09-28 Electronics And Telecommunications Research Institute Method and apparatus for setting quiet window in passive optical network system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3860141A4 *

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