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CN105323662B - Passive optical network and its Low-power-consumptiocontrol control method and optical network unit - Google Patents

Passive optical network and its Low-power-consumptiocontrol control method and optical network unit Download PDF

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Publication number
CN105323662B
CN105323662B CN201510788610.7A CN201510788610A CN105323662B CN 105323662 B CN105323662 B CN 105323662B CN 201510788610 A CN201510788610 A CN 201510788610A CN 105323662 B CN105323662 B CN 105323662B
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onu
power consumption
mode
low power
sleep mode
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CN105323662A (en
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郑龙
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/806—Arrangements for feeding power
    • H04B10/808—Electrical power feeding of an optical transmission system

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a kind of passive optical network and its Low-power-consumptiocontrol control method and optical network unit, the method includes：After OLT enters low-power consumption mode according to the strategy decision pre-established the ONU, Low-Power Instruction is sent to the ONU；For the ONU system equipments of the ONU after receiving the Low-Power Instruction, the ONU optical modules for controlling the ONU enter low-power consumption mode.The case where entering low-power consumption mode according to the strategy instruction ONU pre-established due to OLT, the ONU in entire passive optical network can be controlled to OLT, avoid the occurrence of confusion；After ONU optical modules enter low-power consumption mode, it can achieve the purpose that save power consumption, energy saving.

Description

Passive optical network and low-power-consumption control method thereof and optical network unit
The application is a divisional application of Chinese invention patent application 201210385637.8 entitled "passive optical network and low power consumption control method thereof and optical network unit" provided on 10, 12/2012.
Technical Field
The present invention relates to optical fiber communication technologies, and in particular, to a passive optical network, a low power consumption control method thereof, and an optical network unit.
Background
In the current domestic market and international market, the optical fiber communication direction with high bandwidth, high speed and multiple service fusion is already applied; among the many solutions, the advent of Fiber To The Home (FTTH) is considered the ultimate solution for broadband access. The domestic market has been applied in a large scale.
Among FTTH solutions, GPON (Gigabit Passive Optical Network ) has a maximum transmission rate of 2.5Gbps, and supports multiple services, including ATM, Ethernet, TDM, and CATV, which are the most advanced PON Network technologies at present and are also a very economical and broadband-oriented Network access mode. With the wide application of the GPON network, the ONU optical modules in the GPON network are also widely applied.
In the GPON network shown in fig. 1, an OLT (Optical Line Terminator) is usually disposed in a central office of an access network system of an Optical fiber communication system, and the OLT is responsible for converting electrical signal data in a switch into Optical signal data to be transmitted, receiving an externally transmitted Optical signal, converting the Optical signal into an electrical signal, and transmitting the electrical signal to the switch. The OLT is connected to an ONU (optical network unit) through an ODN (optical feeder network), the ONU is usually located at a central office, that is, a user side or a building, and one ONU usually includes an ONU optical module and an ONU system device; POS (Passive optical Splitter) or Splitter for short, generally has 2N equal ports, and if the light intensity of an input port is 1, the light intensity of each output port is 1/N. For an optical access system, typically 1 OLT is placed in a central office of a telecommunications system and then passes through an optical splitter, typically at least 1 minute 32, or 1 minute 64 or even 1 minute 128, i.e. 1 OLT band 32 or 64 or 128 ONUs.
As shown in fig. 2, the OLT transmits downstream data to the ONUs in a broadcast manner; as shown in fig. 3, the ONU transmits upstream data to the OLT in a TDMA (Time Division Multiple access) manner, and a Time slice for the ONU to transmit the upstream data is specified by the OLT.
The inventor of the invention finds that in practical application, with the increase of the ONU, the power consumption of the network is larger and larger, and the energy consumption is more; therefore, there is a need in the art to reduce the power consumption of an ONU.
Disclosure of Invention
The embodiment of the invention provides a passive optical network, a low-power-consumption control method thereof and an optical network unit, which are used for reducing the power consumption of an ONU and saving energy.
According to an aspect of the present invention, a method for controlling low power consumption in a passive optical network is provided, wherein the passive optical network includes: an optical line terminal OLT and a plurality of optical network units ONU; the method comprises the following steps:
for one ONU, the OLT sends a low-power-consumption instruction to the ONU after determining that the ONU enters a low-power-consumption mode according to a preset strategy;
and after receiving the low-power-consumption instruction, the ONU system equipment of the ONU controls an ONU optical module of the ONU to enter a low-power-consumption mode.
Wherein the policy comprises:
after the OLT receives the low-power-consumption request information sent by the ONU, determining that the ONU enters a low-power-consumption mode; or
And the OLT determines that the idle time of the ONU exceeds a set time period, and then determines that the ONU enters a low power consumption mode.
The low power consumption mode is specifically a doze mode, and the ONU optical module entering the low power consumption mode specifically is:
a driving circuit in the ONU optical module cuts off bias current and modulation current provided for a laser; or,
the low power consumption mode is specifically a deep sleep mode, and the entering of the ONU optical module into the low power consumption mode is specifically:
a driving circuit in the ONU optical module cuts off a bias current and a modulation current which are provided for a laser, and an amplitude limiting amplifying circuit in the ONU optical module cuts off a passage with a trans-impedance amplifier TIA; or,
the low power consumption mode is specifically a light sleep mode, and the ONU optical module entering the low power consumption mode specifically comprises:
the drive circuit in the ONU optical module reduces the bias current and the modulation current provided for the laser, and reduces the current in the amplitude limiting amplifying circuit in the ONU optical module.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and
the OLT determines that the idle time of the ONU exceeds a set time period, and then determines that the ONU enters a low power consumption mode specifically comprises the following steps:
if the OLT determines that the idle time of the ONU exceeds a set time period A, the ONU is determined to enter a doze mode;
if the OLT determines that the idle time of the ONU exceeds a set time period B, the ONU is determined to enter a light sleep mode;
and if the OLT determines that the idle time of the ONU exceeds a set time period C, determining that the ONU enters a deep sleep mode.
The low power consumption request information specifically includes: doze mode request information, light sleep mode request information, deep sleep mode request information; and
before the OLT receives the low-power-consumption request information sent by the ONU, the method further includes:
if the ONU determines that the downlink data flow of the ONU is reduced to 0, sending doze mode request information to the OLT;
if the ONU determines that the idle time of the ONU exceeds a set time period D, sending request information of a light sleep mode to the OLT;
if the ONU determines that the idle time of the ONU exceeds a set time period E, the ONU sends deep sleep mode request information to the OLT; and
the OLT determines that the ONU enters the low power consumption mode according to a preset strategy specifically comprises the following steps:
if receiving the doze mode request information sent by the ONU, the OLT determines that the ONU enters a doze mode;
if the OLT receives the request information of the light sleep mode sent by the ONU, the ONU is determined to enter the light sleep mode;
and if the OLT receives the deep sleep mode request information sent by the ONU, determining that the ONU enters a deep sleep mode.
The low power consumption instruction specifically includes: a doze mode instruction, a light sleep mode instruction, and a deep sleep mode instruction; and
after the OLT determines that the ONU enters the low power consumption mode according to a preset policy, sending a low power consumption instruction to the ONU specifically includes:
if the OLT determines that the ONU enters into a doze mode, sending a doze mode instruction to the ONU;
if the OLT determines that the ONU enters a light sleep mode, sending a light sleep mode instruction to the ONU;
if the OLT determines that the ONU enters the deep sleep mode, a deep sleep mode instruction is sent to the ONU; and
after receiving the low power consumption instruction, the ONU system device controls the ONU optical module of the ONU to enter the low power consumption mode, which specifically includes:
if receiving the doze mode instruction, the ONU system equipment controls an ONU optical module of the ONU to enter a doze mode;
if the ONU system equipment receives the light sleep mode instruction, controlling an ONU optical module of the ONU to enter a light sleep mode;
and if the ONU system equipment receives the deep sleep mode instruction, controlling an ONU optical module of the ONU to enter a deep sleep mode.
Preferably, the low power consumption instruction is carried in a GATE message sent by the OLT to the ONU; and
the low power consumption request information is carried in a GATE message sent by the ONU to the OLT.
Further, after the ONU optical module enters the low power consumption mode, the method further includes:
and if the ONU receives the information sent by the terminal user, controlling the ONU optical module to exit the low power consumption mode and sending an awakening notice to the OLT.
According to an aspect of the present invention, there is provided a passive optical network including: an optical line terminal OLT and a plurality of optical network units ONU;
the OLT sends a low-power-consumption instruction to one ONU after determining that the ONU enters a low-power-consumption mode according to a preset strategy;
and after receiving the low-power-consumption instruction, the ONU system equipment of the ONU controls an ONU optical module of the ONU to enter a low-power-consumption mode.
Wherein the OLT comprises:
the low-power-consumption mode determining module is used for outputting a low-power-consumption notification if an ONU which is communicated with the OLT is determined to enter a low-power-consumption mode according to a preset strategy;
and the instruction sending module is used for sending a low-power-consumption instruction to the ONU entering the low-power-consumption mode determined by the low-power-consumption mode determining module after receiving the low-power-consumption notification output by the low-power-consumption mode determining module.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption mode determination module comprises one of the following units, or any combination of the following units:
a doze mode unit, configured to determine that the ONU enters a doze mode and output the low power consumption notification after an idle time of the ONU exceeds a set time period a;
a light sleep mode unit, configured to determine that the ONU enters a light sleep mode and output the low power consumption notification after the idle time of the ONU exceeds a set time period B;
and the deep sleep mode unit is used for determining that the ONU enters the deep sleep mode and outputting the low-power-consumption notice after the idle time of the ONU exceeds a set time period C.
The low power consumption request information specifically includes: doze mode request information corresponding to the doze mode, light sleep mode request information corresponding to the light sleep mode, and deep sleep mode request information corresponding to the deep sleep mode; and the low power consumption mode determination module further comprises:
and the low-power-consumption request information receiving unit is used for determining that the ONU enters a low-power-consumption mode corresponding to the low-power-consumption request information and outputting the low-power-consumption notification after the OLT receives the low-power-consumption request information sent by the ONU.
The ONU includes: ONU system equipment and an ONU optical module;
and after receiving the low-power-consumption instruction sent by the OLT, the ONU system equipment controls the ONU optical module to enter a low-power-consumption mode.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption instruction specifically comprises: a doze mode instruction corresponding to a doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode; and the number of the first and second groups,
the ONU system device includes: the command receiving and analyzing module and the optical module control module;
the instruction receiving and analyzing module is used for receiving an instruction sent by the OLT, and sending an analysis result to the optical module control module if the instruction is analyzed to be a low-power-consumption instruction;
and the optical module control module is used for sending a corresponding low-power-consumption mode control instruction to the ONU optical module according to the low-power-consumption instruction in the analysis result and controlling the ONU optical module to enter a corresponding low-power-consumption mode.
The low power consumption mode control instruction specifically includes: a doze mode control instruction corresponding to a doze mode, a light sleep mode control instruction corresponding to the light sleep mode, and a deep sleep mode control instruction corresponding to the deep sleep mode; and the number of the first and second groups,
the ONU optical module comprises: the laser comprises an MCU, a laser and a driving circuit thereof, a photodiode, a trans-impedance amplifier TIA and a limiting amplification circuit;
the MCU is used for receiving the low power consumption mode control instruction; if the low-power-consumption mode control instruction is determined to be a doze mode control instruction, sending information to the driving circuit, and controlling the driving circuit to cut off the bias current and the modulation current provided for the laser; or if the low power consumption mode control instruction is determined to be a deep sleep mode control instruction, sending information to the drive circuit, controlling the drive circuit to cut off the bias current and the modulation current provided for the laser, sending information to the amplitude limiting amplification circuit, and controlling the amplitude limiting amplification circuit to cut off a path with the TIA; or if the low power consumption mode control instruction is determined to be a light sleep mode control instruction, sending information to the drive circuit, controlling the drive circuit to reduce the bias current and the modulation current provided for the laser, sending information to the amplitude limiting amplification circuit, and controlling to reduce the current in the amplitude limiting amplification circuit.
Further, the ONU system device further comprises:
a low power consumption decision module, configured to decide to enter a doze mode and send a doze mode notification after determining that the downlink data traffic of the ONU decreases to 0; or after determining that the idle time of the ONU exceeds the set time period D, determining to enter a light sleep mode and sending a light sleep mode notification; or, after determining that the idle time of the ONU exceeds the set time period E, determining to enter a deep sleep mode, and sending a deep sleep mode notification;
and the request information sending module is used for sending corresponding low-power consumption request information according to the notice sent by the low-power consumption determining module.
Preferably, the ONU is further configured to control the ONU optical module to exit the low power consumption mode and send an awake notification to the OLT after receiving information sent by the end user.
According to another aspect of the present invention, there is also provided an optical line termination, OLT, in a passive optical network, comprising:
the low-power-consumption mode determining module is used for determining that one ONU in the optical network enters a low-power-consumption mode according to a preset strategy and then outputting a low-power-consumption notice;
and the instruction sending module is used for sending a low-power-consumption instruction to the ONU entering the low-power-consumption mode determined by the low-power-consumption mode determining module after receiving the low-power-consumption notification output by the low-power-consumption mode determining module.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption mode determination module comprises one of the following units, or any combination of the following units:
a doze mode unit, configured to determine that the ONU enters a doze mode and output the low power consumption notification after an idle time of the ONU exceeds a set time period a;
a light sleep mode unit, configured to determine that the ONU enters a light sleep mode and output the low power consumption notification after the idle time of the ONU exceeds a set time period B;
and the deep sleep mode unit is used for determining that the ONU enters the deep sleep mode and outputting the low-power-consumption notice after the idle time of the ONU exceeds a set time period C.
Preferably, the low power consumption mode determining module further includes:
a low power consumption request information receiving unit, configured to determine, after the OLT receives low power consumption request information sent by the ONU, that the ONU enters a low power consumption mode corresponding to the low power consumption request information, and output the low power consumption notification;
the low power consumption request information specifically includes: doze mode request information corresponding to the doze mode, light sleep mode request information corresponding to the light sleep mode, and deep sleep mode request information corresponding to the deep sleep mode.
The low power consumption instruction specifically includes: a doze mode instruction corresponding to the doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode; and the instruction sending module specifically comprises:
the message generation module is used for generating a GATE message sent to the ONU entering the low power consumption mode determined by the low power consumption mode determination module after receiving the low power consumption notification output by the low power consumption mode determination module, and carrying a corresponding low power consumption instruction in the GATE message;
and the message sending module is used for sending the GATE message generated by the message generating module.
According to another aspect of the present invention, there is also provided an optical network unit, including: ONU system equipment and an ONU optical module;
and after receiving the low-power-consumption instruction sent by the OLT, the ONU system equipment controls the ONU optical module to enter a low-power-consumption mode.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption instruction specifically comprises: a doze mode instruction corresponding to a doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode; and the number of the first and second groups,
the ONU system device includes: the command receiving and analyzing module and the optical module control module;
the instruction receiving and analyzing module is used for receiving an instruction sent by the OLT, and sending an analysis result to the optical module control module if the instruction is analyzed to be a low-power-consumption instruction;
and the optical module control module is used for sending a corresponding low-power-consumption mode control instruction to the ONU optical module according to the low-power-consumption instruction in the analysis result and controlling the ONU optical module to enter a corresponding low-power-consumption mode.
Further, the ONU system device further comprises:
a low power consumption decision module, configured to decide to enter a doze mode and send a doze mode notification after determining that the downlink data traffic of the ONU decreases to 0; or after determining that the idle time of the ONU exceeds the set time period D, determining to enter a light sleep mode and sending a light sleep mode notification; or, after determining that the idle time of the ONU exceeds the set time period E, determining to enter a deep sleep mode, and sending a deep sleep mode notification;
and the request information sending module is used for sending corresponding low-power consumption request information according to the notice sent by the low-power consumption determining module.
Further, the optical module control module is further configured to control the ONU optical module to exit the low power consumption mode after controlling the ONU optical module to enter the corresponding low power consumption mode and after the ONU receives information sent by an end user; and
the request information sending module is further configured to send a wake-up notification to the OLT after the optical module control module controls the ONU optical module to exit the low power consumption mode.
The low power consumption mode control instruction specifically includes: a doze mode control instruction corresponding to a doze mode, a light sleep mode control instruction corresponding to the light sleep mode, and a deep sleep mode control instruction corresponding to the deep sleep mode; and the number of the first and second groups,
the ONU optical module comprises: the laser comprises an MCU, a laser and a driving circuit thereof, a trans-impedance amplifier TIA and a limiting amplification circuit;
the MCU is used for receiving the low power consumption mode control instruction; if the low-power-consumption mode control instruction is determined to be a doze mode control instruction, sending information to the driving circuit, and controlling the driving circuit to cut off the bias current and the modulation current provided for the laser; or if the low power consumption mode control instruction is determined to be a deep sleep mode control instruction, sending information to the drive circuit, controlling the drive circuit to cut off the bias current and the modulation current provided for the laser, sending information to the amplitude limiting amplification circuit, and controlling the amplitude limiting amplification circuit to cut off a path with the TIA; or if the low power consumption mode control instruction is determined to be a light sleep mode control instruction, sending information to the drive circuit, controlling the drive circuit to reduce the bias current and the modulation current provided for the laser, sending information to the amplitude limiting amplification circuit, and controlling to reduce the current in the amplitude limiting amplification circuit.
Preferably, the MCU is further configured to control the ONU optical module to exit the low power consumption mode after receiving the instruction to exit the low power consumption mode.
According to another aspect of the present invention, there is also provided an ONU system apparatus in an optical network unit, comprising: the command receiving and analyzing module and the optical module control module;
the instruction receiving and analyzing module is used for receiving an instruction sent by the OLT, and sending an analysis result to the optical module control module if the instruction is analyzed to be a low-power-consumption instruction;
and the optical module control module is used for sending a corresponding low-power-consumption mode control instruction to the ONU optical module according to the low-power-consumption instruction in the analysis result and controlling the ONU optical module to enter a corresponding low-power-consumption mode.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption instruction specifically comprises: a doze mode instruction corresponding to a doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode; and the number of the first and second groups,
the ONU system device further comprises:
a low power consumption decision module, configured to decide to enter a doze mode and send a doze mode notification after determining that the downlink data traffic of the ONU decreases to 0; or after determining that the idle time of the ONU exceeds the set time period D, determining to enter a light sleep mode and sending a light sleep mode notification; or, after determining that the idle time of the ONU exceeds the set time period E, determining to enter a deep sleep mode, and sending a deep sleep mode notification;
and the request information sending module is used for sending corresponding low-power consumption request information according to the notice sent by the low-power consumption determining module.
The optical module control module is also used for controlling the ONU optical module to exit the low power consumption mode after controlling the ONU optical module to enter the corresponding low power consumption mode and after the optical network unit receives information sent by a terminal user; and
the request information sending module is further configured to send a wake-up notification to the OLT after the optical module control module controls the ONU optical module to exit the low power consumption mode.
According to another aspect of the present invention, there is also provided an ONU optical module in an optical network unit, including: the laser comprises an MCU, a laser and a driving circuit thereof, a trans-impedance amplifier TIA and a limiting amplification circuit;
the MCU is used for receiving the low power consumption mode control instruction; the low power consumption mode control instruction specifically includes: a doze mode control instruction corresponding to a doze mode, a light sleep mode control instruction corresponding to the light sleep mode, and a deep sleep mode control instruction corresponding to the deep sleep mode;
if the MCU determines that the low-power-consumption mode control instruction is a doze mode control instruction, the MCU sends information to the drive circuit and controls the drive circuit to cut off the bias current and the modulation current provided for the laser; or,
if the MCU determines that the low power consumption mode control instruction is a deep sleep mode control instruction, the MCU sends information to the drive circuit, controls the drive circuit to cut off the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls the amplitude limiting amplification circuit to cut off a path with the TIA; or,
and if the MCU determines that the low power consumption mode control instruction is a light sleep mode control instruction, the MCU sends information to the drive circuit, controls the drive circuit to reduce the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls to reduce the current in the amplitude limiting amplification circuit.
Further, the MCU is also used for controlling the ONU optical module to exit the low power consumption mode after receiving the control instruction for exiting the low power consumption mode.
In the technical scheme provided by the embodiment of the invention, after the OLT judges that the ONU can enter the low power consumption mode according to a preset strategy, the OLT sends a low power consumption instruction to the ONU to indicate the ONU to enter the low power consumption mode, so that the OLT can master the condition of the ONU in the whole passive optical network and avoid confusion; and after the ONU controls the ONU optical module to enter the low power consumption mode according to the instruction, the laser is closed to temporarily stop transmitting the optical signal, or the output of the optical receiving component is cut off to temporarily stop receiving the optical signal, thereby achieving the purposes of saving power consumption and energy.
And the ONU can wake up from the low power consumption mode by itself after receiving the uplink data sent by the terminal user and send a notice to inform the OLT, thereby entering a normal working state.
Drawings
FIG. 1 is a schematic diagram of a prior art passive optical network;
fig. 2 is a schematic diagram of transmitting downstream data in a passive optical network according to the prior art;
fig. 3 is a schematic diagram of transmitting upstream data in a passive optical network according to the prior art;
fig. 4 is a schematic diagram of a passive optical network according to an embodiment of the present invention;
fig. 5 is a flow chart of a passive optical network low power consumption control method according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for an ONU to send low-power-consumption request information to an OLT according to an embodiment of the present invention;
fig. 7 is a block diagram of an internal structure of an OLT according to an embodiment of the present invention;
fig. 8 is a block diagram of an internal structure of an ONU system device in the ONU according to the embodiment of the present invention;
fig. 9 is a block diagram of an internal circuit of an ONU optical module in the ONU according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As used in this application, the terms "module," "system," and the like are intended to include a computer-related entity, such as but not limited to hardware, firmware, a combination of hardware and software, or software in execution. For example, a module may be, but is not limited to: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer.
The inventors of the present invention consider that, in a passive optical network, since downstream data received by ONUs is transmitted by an OLT, and the OLT allocates a period for transmitting upstream data to the ONUs, the OLT can know a period for each ONU to receive the downstream data and a period for transmitting the upstream data; therefore, the OLT may control the ONU to enter the low power consumption mode, for example, control the ONU to turn off the laser or the receiver, in a time period in which the ONU does not need to receive downlink data nor send uplink data, according to a predetermined policy; therefore, the power consumption of the ONU optical module is reduced, the power consumption of the ONU is also reduced, and the purpose of saving energy is achieved.
The technical solution of the embodiments of the present invention is described in detail below with reference to the accompanying drawings. As shown in fig. 4, the passive optical network according to the embodiment of the present invention includes: OLT401, POS402, and a plurality of ONUs 403.
OLT401 is connected to POS402 via optical fiber, and each ONU403 is connected to POS402 via optical fiber, so that each ONU403 communicates with POS402 via optical fiber to OLT 401.
The low power consumption control method in the passive optical network of the embodiment of the present invention, that is, the method for controlling the ONU403 to enter the low power consumption mode by the OLT401, is shown in fig. 5, and includes the following steps:
s501: after determining that an ONU403 in the passive optical network enters the low power consumption mode according to a predetermined policy, the OLT401 sends a low power consumption instruction to the ONU, where the low power consumption instruction may be specifically carried in a GATE message (window message) for sending.
The policy pre-established in the OLT401 may be: when the OLT401 determines that the idle time of an ONU403 in the passive optical network exceeds a set time period, it determines that the ONU enters a low power consumption mode.
Preferably, the low power consumption mode may include: a doze mode;
further, the low power consumption mode may further include: a light sleep mode, a deep sleep mode;
the policy pre-established in the OLT401 may specifically include:
the OLT401 determines that the ONU enters into a doze mode if it is determined that the idle time of the ONU exceeds the set time period a;
further, the policy pre-established in the OLT401 may further include:
the OLT401 determines that the ONU enters the light sleep mode if it is determined that the idle time of the ONU exceeds the set time period B;
the OLT401 determines that the ONU enters the deep sleep mode if it is determined that the idle time of the ONU exceeds the set time period C.
The setting time period a, the setting time period B and the setting time period C can be set by those skilled in the art according to actual situations. For example, the set time period a is set to 1s, the set time period B is set to 3s, and the set time period C is set to 6 s.
Obviously, other strategies can be set by those skilled in the art according to actual conditions.
In this step, after determining the low power consumption mode of the ONU, the OLT401 sends a corresponding low power consumption instruction to the ONU; preferably, the low power instructions may include: a doze mode instruction corresponding to the doze mode; further, the low power instructions may further include: a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode.
Specifically, if OLT401 determines that the ONU enters into the doze mode, it sends a doze mode instruction to the ONU;
if the OLT401 determines that the ONU enters the light sleep mode, sending a light sleep mode instruction to the ONU;
if the OLT401 determines that the ONU enters the deep sleep mode, it sends a deep sleep mode command to the ONU.
The low power consumption instruction may be specifically carried in a GATE message sent by OLT401 to the ONU. Specifically, after the OLT401 determines that the ONU enters the low power consumption mode, the OLT401 carries a low power consumption instruction in each GATE message sent to the ONU until receiving an awake notification sent by the ONU.
S502: after receiving the low power consumption instruction sent by the OLT401, the ONU403 controls the ONU optical module of the ONU to enter the low power consumption mode.
Specifically, after receiving the low power consumption instruction sent by the OLT401, the ONU system device of the ONU403 sends a corresponding low power consumption mode control instruction to the ONU optical module, and controls the ONU optical module of the ONU to enter a corresponding low power consumption mode.
The low power mode control instructions may include: a doze mode control command corresponding to a doze mode, a light sleep mode control command corresponding to the light sleep mode, and a deep sleep mode control command corresponding to the deep sleep mode.
If the low power consumption instruction received by the ONU403 is a doze mode instruction, the ONU system device sends a doze mode control instruction to the ONU optical module; after receiving a doze mode control instruction, an MCU in the ONU optical module sends information to a driving circuit in the ONU optical module, and controls the driving circuit to cut off a bias current and a modulation current provided for a laser, so that the ONU optical module enters a doze mode;
if the low power consumption instruction received by the ONU403 is a light sleep mode instruction, the ONU system device sends a light sleep mode control instruction to the ONU optical module; after receiving a control instruction of a light sleep mode, an MCU in an ONU optical module sends information to the drive circuit, controls the drive circuit to reduce the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls to reduce the current in the amplitude limiting amplification circuit;
if the low-power-consumption instruction received by the ONU403 is a deep sleep mode instruction, the ONU system device sends a deep sleep mode control instruction to the ONU optical module; and after receiving the deep sleep mode control instruction, the MCU in the ONU optical module sends information to the drive circuit, controls the drive circuit to cut off the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls the amplitude limiting amplification circuit to cut off a passage with the TIA.
The low-power-consumption mode control instruction can be sent to the ONU optical module by the ONU system equipment through an IIC bus or other serial or parallel buses; or the MCU in the ONU system device may send a low power consumption mode control instruction to the ONU optical module through a general purpose input/output port pin (GPIO pin) connected to the MCU in the ONU optical module.
That is to say, when the low power consumption mode is specifically a doze mode, that is, after the MCU of the ONU optical module receives a doze mode control instruction, the driving circuit in the ONU optical module is controlled to cut off the bias current and the modulation current provided to the laser;
when the low power consumption mode is a deep sleep mode, namely after the MCU of the ONU optical module receives a deep sleep mode control instruction, controlling a driving circuit in the ONU optical module to cut off bias current and modulation current provided for a laser, and controlling an amplitude limiting amplifying circuit in the ONU optical module to cut off a channel with a TIA (transimpedance amplifier);
when the low power consumption mode is specifically a light sleep mode, namely after the MCU of the ONU optical module receives a control instruction of the light sleep mode, the driving circuit in the ONU optical module is controlled to reduce the bias current and the modulation current provided for the laser, and the current in the amplitude limiting amplifying circuit in the ONU optical module is controlled to be reduced.
S503: after receiving the information sent by the end user, the ONU403 controls the ONU optical module of the ONU to exit the low power consumption mode, and enters a normal operating mode.
After the ONU optical module enters the low power consumption mode, if the ONU403 receives information sent by an end user, the ONU system equipment of the ONU403 sends a wake-up control instruction to the ONU optical module, after receiving the wake-up control instruction, the MCU of the ONU optical module exits the low power consumption mode and enters a normal working mode, namely, a driving circuit in the ONU optical module is controlled to provide normal bias current and modulation current for a laser, the current in a limiting amplification circuit in the ONU optical module is controlled to recover to be normal current, and the limiting amplification circuit normally receives the current output by the TIA.
S504: the ONU403 sends an awake notification to the OLT401 after controlling the ONU optical module to exit the low power consumption mode.
After controlling the ONU optical module to exit the low power consumption mode, the ONU403 sends an awake notification to the OLT401, and notifies the OLT401 that the ONU has exited the low power consumption mode and enters a normal operating mode. The wakeup notification sent by ONU403 to OLT401 may be specifically carried in a GATE message.
Further, the policy pre-established in the OLT401 may further include: and if the OLT receives the low-power-consumption request information sent by the ONU, determining that the ONU enters a low-power-consumption mode. The specific process is shown in fig. 6, and includes the following steps:
s601: the ONU403 determines that the ONU enters the low power consumption mode according to a predetermined rule, and then transmits low power consumption request information to the OLT 401.
Specifically, the low power consumption request information may include: doze mode request information corresponding to the doze mode, light sleep mode request information corresponding to the light sleep mode, and deep sleep mode request information corresponding to the deep sleep mode.
The rules pre-established in the ONU403 may be as follows:
if the ONU determines that the downlink data flow of the ONU is reduced to 0, the ONU is determined to enter a low-power-consumption mode of a doze mode, and doze mode request information is sent to the OLT 401;
if the ONU determines that the idle time of the ONU exceeds the set time period D, the ONU is determined to enter a low power consumption mode of a light sleep mode, and light sleep mode request information is sent to the OLT 401;
and if the ONU determines that the idle time of the ONU exceeds the set time period E, the ONU is determined to enter a low power consumption mode of a deep sleep mode, and deep sleep mode request information is sent to the OLT.
Obviously, other rules can be set by those skilled in the art according to actual situations. The setting time period D and the setting time period E can be set by those skilled in the art according to actual situations. For example, the set time period D is set to 3s and the set time period E is set to 6 s.
The low power consumption request information sent by ONU403 may specifically be carried in a GATE message and sent to OLT 401.
S602: OLT401 receives the low power consumption request message sent by ONU403, and then determines that the ONU enters the low power consumption mode.
Specifically, after receiving the low power consumption request message sent by the ONU403, the OLT401 determines that the ONU enters a corresponding low power consumption mode:
if OLT401 receives the doze mode request message sent by ONU403, it determines that the ONU enters the low power consumption mode of the doze mode;
if OLT401 receives the light sleep mode request message sent by ONU403, it determines that the ONU enters the low power consumption mode of the light sleep mode;
when OLT401 receives the deep sleep mode request message sent by ONU403, it determines that the ONU enters the low power consumption mode of the deep sleep mode.
S603: after determining that ONU403 enters the low power mode, OLT401 transmits a low power consumption command to the ONU.
Specifically, after deciding that the ONU403 enters the low power consumption mode, the OLT401 sends a corresponding low power consumption instruction to the ONU.
After determining that the ONU403 enters the low power consumption mode, the OLT401 sends a corresponding low power consumption instruction to the ONU in the same manner as the related content in step 501, which is not described herein again;
the steps after the ONU403 sends the low power consumption command are the same as the steps S502 to S504, and are not described herein again.
As shown in fig. 7, the internal configuration block diagram of the optical line terminal OLT401 includes: a low power consumption mode determining module 701 and an instruction sending module 702.
The low power consumption mode determining module 701 is configured to determine that one ONU in the passive optical network enters the low power consumption mode according to a predetermined policy, and output a low power consumption notification;
the instruction sending module 702 is configured to send a low power consumption instruction to the ONU entering the low power consumption mode determined by the low power consumption mode determining module 701 after receiving the low power consumption notification output by the low power consumption mode determining module 701.
Specifically, the low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and, the low power consumption mode determining module 701 includes one of the following units, or any combination of the following units:
a doze mode unit 711, configured to determine that the ONU enters a doze mode and output the low power consumption notification when the idle time of the ONU exceeds a set time period a;
a light sleep mode unit 712, configured to determine that the ONU enters a light sleep mode and output the low power consumption notification when the idle time of the ONU exceeds a set time period B;
a deep sleep mode unit 713, configured to determine that the ONU enters a deep sleep mode after the idle time of the ONU exceeds a set time period C, and output the low power consumption notification.
Further, the low power consumption mode determining module 701 may further include:
a low power consumption request information receiving unit 714, configured to determine, after the OLT receives low power consumption request information sent by the ONU, that the ONU enters a low power consumption mode corresponding to the low power consumption request information, and output the low power consumption notification; the low power consumption request information specifically includes: doze mode request information corresponding to the doze mode, light sleep mode request information corresponding to the light sleep mode, and deep sleep mode request information corresponding to the deep sleep mode.
Specifically, the low power consumption instruction may include: a doze mode instruction corresponding to the doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode; the instruction sending module 702 may specifically include:
a message generating module 721, configured to generate, after receiving the low power consumption notification output by the low power consumption mode determining module 701, a GATE message sent to the ONU entering the low power consumption mode determined by the low power consumption mode determining module 701, and carry a corresponding low power consumption instruction in the GATE message;
a message sending module 722, configured to send the GATE message generated by the message generating module.
As shown in fig. 8, the internal configuration block diagram of the optical network unit ONU403 includes: ONU system device 801, and ONU optical module 802.
After receiving the low power consumption instruction sent by the OLT, the ONU system device 801 controls the ONU optical module 802 to enter the low power consumption mode.
The ONU system device 801 specifically includes: an instruction receiving and analyzing module 811 and an optical module control module 812;
the instruction receiving and analyzing module 811 is configured to receive an instruction sent by the OLT, and send an analysis result to the optical module control module 812 if the instruction is analyzed to be a low power consumption instruction;
the optical module control module 812 is configured to send a corresponding low power consumption mode control instruction to the ONU optical module according to the low power consumption instruction in the analysis result, and control the ONU optical module 802 to enter a corresponding low power consumption mode.
The low power consumption mode specifically includes: a doze mode, a light sleep mode, a deep sleep mode; and the low power consumption instruction specifically comprises: a doze mode instruction corresponding to a doze mode, a light sleep mode instruction corresponding to the light sleep mode, and a deep sleep mode instruction corresponding to the deep sleep mode.
Further, the ONU system device further includes: a low power consumption decision module 813 and a request information sending module 814.
The low power consumption determination module 813 is configured to determine to enter a doze mode and send a doze mode notification after determining that the downlink data traffic of the ONU is decreased to 0; or after determining that the idle time of the ONU exceeds the set time period D, determining to enter a light sleep mode and sending a light sleep mode notification; or, after determining that the idle time of the ONU exceeds the set time period E, determining to enter a deep sleep mode, and sending a deep sleep mode notification;
the request information sending module 814 is configured to send corresponding low-power request information according to the notification sent by the low-power decision module 813. The low power consumption request information specifically includes: doze mode request information corresponding to the doze mode, light sleep mode request information corresponding to the light sleep mode, and deep sleep mode request information corresponding to the deep sleep mode.
Further, the optical module control module 812 is further configured to, after controlling the ONU optical module 802 to enter the corresponding low power consumption mode, if the ONU receives information sent by the end user, exit a low power consumption mode control instruction to the ONU optical module 802, and control the ONU optical module 802 to exit the low power consumption mode; and
the request information sending module 814 is further configured to send a wake-up notification to the OLT after the optical module control module 812 controls the ONU optical module 802 to exit the low power consumption mode.
As shown in fig. 9, the ONU optical module 802 includes: an MCU (Microprogrammed Control Unit) 921, a laser 922 and its driving circuit 923, a photodiode 924, a transimpedance amplifier TIA925, and a limiting amplifier circuit 926.
In general, an ONU optical module includes a laser transmitter unit to transmit an uplink optical signal; the ONU optical module also comprises a laser receiving unit used for receiving the downlink optical signal sent by the OLT.
The laser emitting unit generally includes: and after the drive circuit receives the electric signal, the drive circuit drives a laser emission light source in the laser to emit laser with a specific wavelength as an uplink optical signal according to the received electric signal.
The laser receiving unit generally includes: the device comprises a light receiving component and an amplitude limiting amplifying circuit; the light receiving module generally includes: photodiode, transimpedance amplifier TIA. The photodiode outputs corresponding response current to the TIA after detecting the downlink optical signal, and the TIA outputs corresponding differential electrical signals; the differential signal is sent to a limiting amplification circuit, and the limiting amplification circuit carries out limiting amplification on the differential signal and outputs a corresponding electric signal.
The MCU in the ONU optical module can communicate with the drive circuit through an IIC bus or other serial buses or parallel buses, and is used for controlling the drive circuit or configuring parameters of the drive circuit;
the MCU in the ONU optical module can also communicate with the amplitude limiting amplifying circuit through an IIC bus or other serial buses or parallel buses, so as to control the amplitude limiting amplifying circuit or configure parameters of the amplitude limiting amplifying circuit.
In the ONU optical module 802 provided in the embodiment of the present invention:
after receiving the low power consumption mode control instruction, the MCU921 controls the ONU optical module 802 to enter the low power consumption mode specifically may be:
the MCU921 receives the low power mode control instruction; if the low-power-consumption mode control instruction is determined to be a doze mode control instruction, the information is sent to the driving circuit 923, and the driving circuit 923 is controlled to cut off the bias current and the modulation current provided for the laser 922, so that the ONU optical module 802 is controlled to enter a low-power-consumption mode of the doze mode;
or if the MCU921 determines that the low power consumption mode control instruction is a deep sleep mode control instruction, the MCU921 sends information to the driving circuit 923, controls the driving circuit 923 to cut off the bias current and the modulation current provided to the laser 922, sends information to the amplitude limiting amplifier circuit 926, and controls the amplitude limiting amplifier circuit 926 to cut off the path to the TIA925, thereby controlling the ONU optical module 802 to enter the low power consumption mode of the deep sleep mode;
or, if the MCU921 determines that the low power consumption mode control instruction is a light sleep mode control instruction, it sends information to the driving circuit 923, and the driving circuit 923 is controlled to reduce the bias current and the modulation current supplied to the laser 922, and sends information to the limiting amplifier circuit 926 to control the reduction of the current in the limiting amplifier circuit 926.
Further, after receiving the control instruction to exit the low power consumption mode, the MCU921 controls the ONU optical module 802 to exit the low power consumption mode: the MCU921 controls the normal bias current and modulation current provided by the driver 923 to the laser 922, and the MCU921 controls the limiting amplifier 926 to normally receive the output current of the TIA925, and controls the current in the limiting amplifier 926 to return to normal.
In fact, since the time for sending the optical signal by the ONU is controlled and arranged by the OLT, the ONU optical module of the ONU cannot be simply and directly controlled by itself to enter the low power consumption mode in order to save power consumption of the ONU, and if the ONU enters the low power consumption mode by itself, the ONU causes confusion of the entire passive optical network system. Based on this, in the technical scheme provided by the embodiment of the invention, after the OLT judges that the ONU can enter the low power consumption mode according to a preset strategy, the OLT sends a low power consumption instruction to the ONU to instruct the ONU to enter the low power consumption mode, so that the OLT can master the conditions of the ONU in the whole passive optical network and avoid confusion; and after the ONU controls the ONU optical module to enter the low power consumption mode according to the instruction, the laser is closed to temporarily stop transmitting the optical signal, or the output of the optical receiving component is cut off to temporarily stop receiving the optical signal, thereby achieving the purposes of saving power consumption and energy.
And the ONU can wake up from the low power consumption mode by itself after receiving the uplink data sent by the terminal user and send a notice to inform the OLT, thereby entering a normal working state.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (4)

1. An ONU optical module in an optical network unit, comprising: the laser comprises an MCU, a laser and a driving circuit thereof, a trans-impedance amplifier TIA and a limiting amplification circuit;
the MCU is used for receiving a low power consumption mode control instruction; the low power consumption mode control instruction specifically includes: a doze mode control instruction corresponding to the doze mode, a light sleep mode control instruction corresponding to the light sleep mode, and a deep sleep mode control instruction corresponding to the deep sleep mode;
if the MCU determines that the low-power-consumption mode control instruction is a doze mode control instruction, the MCU sends information to the drive circuit and controls the drive circuit to cut off the bias current and the modulation current provided for the laser; or,
if the MCU determines that the low power consumption mode control instruction is a deep sleep mode control instruction, the MCU sends information to the drive circuit, controls the drive circuit to cut off the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls the amplitude limiting amplification circuit to cut off a path with the TIA; or,
and if the MCU determines that the low power consumption mode control instruction is a light sleep mode control instruction, the MCU sends information to the drive circuit, controls the drive circuit to reduce the bias current and the modulation current provided for the laser, sends information to the amplitude limiting amplification circuit, and controls to reduce the current in the amplitude limiting amplification circuit.
2. The ONU optical module of claim 1,
and the MCU is also used for controlling the ONU optical module to exit the low power consumption mode after receiving the control instruction for exiting the low power consumption mode.
3. The ONU optical module of claim 1, wherein:
if the fact that the idle time of the ONU exceeds the set time period A is determined, the ONU is determined to enter a doze mode;
if the fact that the idle time of the ONU exceeds the set time period B is determined, the ONU is determined to enter a light sleep mode;
and if the fact that the idle time of the ONU exceeds the set time period C is determined, the ONU is determined to enter the deep sleep mode.
4. The ONU optical module of claim 3, wherein:
if determining that the downlink data flow of the ONU is reduced to 0, sending doze mode request information to the OLT;
if the fact that the idle time of the ONU exceeds a set time period D is determined, sending request information of a light sleep mode to the OLT;
and if the fact that the idle time of the ONU exceeds the set time period E is determined, sending deep sleep mode request information to the OLT.
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