CN101026416A - Optical network unit and its control method - Google Patents
Optical network unit and its control method Download PDFInfo
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- CN101026416A CN101026416A CNA2006100088499A CN200610008849A CN101026416A CN 101026416 A CN101026416 A CN 101026416A CN A2006100088499 A CNA2006100088499 A CN A2006100088499A CN 200610008849 A CN200610008849 A CN 200610008849A CN 101026416 A CN101026416 A CN 101026416A
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Abstract
The light network unit includes a light receiving module, an energy conversion module, and an adjustment module. The light reception module receives a light power signal. The energy conversion module converts light power signal too an electrical level signal. According to the electrical level signal, the adjustment module generates a power adjustment signal, based on which a transmission power of light network unit is adjusted. The invention also discloses a method for controlling light network unit. The method includes steps: receiving a light power signal; converting light power signal to an electrical level signal; based on the electrical level signal to generate a power adjustment signal; and based on a power adjustment signal to adjust a transmission power of light network unit.
Description
Technical field
The present invention relates to a kind of optical network unit, the particularly a kind of optical network unit that can control transmitting power on one's own initiative.
Background technology
Please refer to shown in Figure 1, EPON (Passive Optical Network, PON) 1 technology is more a kind of optical fiber transmission technique to multiple spot, it generally is by an optical line terminal equipment (Optical Line Termination, OLT) 11 by an Optical Distribution Network (OpticalDistribution Network, ODN) 13, and with a plurality of optical network units (Optical NetworkUnit, ONU) 12 carry out message transmission, wherein, Optical Distribution Network 13 is made up of 131 of a plurality of optical branching devices (Splitter).
Because the execution speed of a receiving element of optical line terminal equipment 11 needs greater than 1244.16Mb/s, so the receiving element of optical line terminal equipment 11 must possess the characteristics of high sensitivity and great dynamic range.The transmitting power of one transmitter of optical network unit 12 during to optical line terminal equipment 11, if power is too big, can cause the load too high of the receiving element of optical line terminal equipment 11 with message transmission through Optical Distribution Network 13; And, then can cause optical line terminal equipment 11 that the information erroneous judgement is to cause the omission of information by noise if power is too little.Therefore, between optical line terminal equipment 11 and optical network unit 12, must obtain suitable through-put power,, avoid the omission of information simultaneously to keep the useful life of optical line terminal equipment 11.
Because optical network unit 12 is scattered in various places, therefore each optical network unit 12 equates with the distance of optical line terminal equipment 11 is neither, prior art is to send a test signal to each optical network unit 12 by optical line terminal equipment 11, each optical network unit 12 then is emitted to optical line terminal equipment 11 with an optical power signals, measure the optical power signals intensity of each optical network unit 12 again by optical line terminal equipment 11, and according to after the intensity classification, whether reinform each optical network unit 12 needs to improve or reduce transmitting power or keep former transmitting power, in other words, optical network unit 12 only possesses the ability that improves or reduce transmitting power is passively arranged, and can't judge or control transmitting power on one's own initiative, making optical line terminal equipment 11 to possess has powerful calculation function, to keep the efficiency of transmission of EPON 1, can make also that therefore the design of optical line terminal equipment 11 is comparatively complicated.
Therefore, how to provide a kind of optical network unit and control method thereof to simplify the design complexities of the optical line terminal equipment in the EPON, and make optical network unit have the function of controlling on one's own initiative or judging required transmitting power, real one of the current important topic that belongs to.
Summary of the invention
Because above-mentioned problem the purpose of this invention is to provide a kind of optical network unit and the control method thereof that can control transmitting power on one's own initiative, simplify the design complexities of the optical line terminal equipment in the EPON, and keep the optimum efficiency of message transmission.
Edge is for reaching above-mentioned purpose, to comprise an Optical Receivers, an energy conversion module and an adjusting module according to a kind of optical network unit of the present invention.Optical Receivers receives an optical power signals; Energy conversion module is converted to a level signal with optical power signals; Adjusting module produces a power according to level signal and adjusts signal, and adjusts a transmitting power of optical network unit according to this.
The present invention also provides a kind of control method of optical network unit, and it may further comprise the steps: receive an optical power signals; Optical power signals is converted to a level signal; Produce a power according to level signal and adjust signal; An and transmitting power of adjusting signal adjustment optical network unit according to power.
From the above, because of being to utilize energy conversion module and adjusting module according to a kind of optical network unit of the present invention and control method thereof, and make that optical network unit can be according to the optical power signals that optical line terminal equipment transmitted, and judge and control the size of required transmitting power on one's own initiative.Compare with prior art, when the present invention is applied to EPON, can simplify the design complexities of optical line terminal equipment, and optical network unit also can be along with dynamic change, and change transmitting power at any time, to keep the optimum efficiency of message transmission.
Description of drawings
Fig. 1 is a kind of structure chart of existing passive optical-fiber network;
Fig. 2 is the calcspar according to a kind of optical network unit of preferred embodiment of the present invention;
Fig. 3 is the schematic diagram of adjusting module of the optical network unit of Fig. 2;
Fig. 4 is the main circuit figure that the power of the adjusting module of Fig. 3 is adjusted the loop;
Fig. 5 is the optical network unit according to preferred embodiment of the present invention, wherein, and the level signal that energy conversion module produced, and the power that adjusting module produced is adjusted a graph of a relation of signal; And
Fig. 6 is the flow chart according to the control method of a kind of optical network unit of preferred embodiment of the present invention.
The reference numeral explanation:
The 1-EPON
The 11-optical line terminal equipment
The 12-optical network unit
The 13-Optical Distribution Network
The 131-optical branching device
The 21-optical network unit
The 211-Optical Receivers
The 212-energy conversion module
The 213-adjusting module
2131-power is adjusted the loop
2132-drives the loop
The 214-transmitter module
The S1-optical power signals
The S2-level signal
S3-power is adjusted signal
The R1-bias resistance
R2-modulates resistance
R3～R6-resistor
OP1, OP2-operational amplifier
The IAPC-bias current
The IMOD-modulated current
The VAPC-bias voltage
The VMOD-modulation voltage
S01～S04-process step
Embodiment
Hereinafter with reference to relevant drawings, a kind of optical network unit and control method thereof according to preferred embodiment of the present invention are described, wherein, identical assembly will be illustrated with identical reference marks.
Please refer to shown in Figure 2, a kind of optical network unit 21 of preferred embodiment of the present invention can with an optical line terminal equipment fit applications in an EPON, wherein, optical network unit 21 comprises an Optical Receivers 211, an energy conversion module 212 and an adjusting module 213.
Adjusting module 213 produces a power according to level signal S2 and adjusts signal S3, and adjust the transmitting power that signal S3 adjusts a transmitter module 214 of optical network unit 21 according to power, in the present embodiment, it is a current signal that power is adjusted signal S3, and transmitter module 214 is laser modules.
In addition, please refer to shown in Figure 3ly, adjusting module 213 comprises that a power adjusts loop 2131 and and drive loop 2132.Wherein, power is adjusted loop 2131 incoming level signal S2 and is produced power and adjusts signal S3; Drive loop 2132 and then adjust the transmitting power that signal S3 drives the transmitter module 214 of optical network unit 21 according to power, in the present embodiment, driving loop 2132 can realize by digital form, promptly drives loop 2132 and can be a drive IC.
Because the driving loop 2132 of transmitter module 214 generally is the type of drive that adopts Voltage-controlled Current Source (VCCS), and is normally controlled by a bias current and a modulated current.Therefore, please refer to shown in Figure 4, in the present embodiment, power is adjusted loop 2131 and is comprised that two groups of operational amplifier OP1, OP2 are with respectively according to level signal S2, adjust signal S3 and produce power, wherein, power adjustment signal S3 promptly is bias current IAPC and the modulated current IMOD that is respectively shown in Figure 4.In the present embodiment, operational amplifier OP1 and resistor R 3, R4 constitute a negative feedback operational amplifier, and it is electrically connected a bias resistance R1; Operational amplifier OP2 and resistor R 5, R6 constitute another negative feedback operational amplifier, and it is electrically connected a modulation resistance R2.Its expression formula is as follows:
Wherein, R1 is a bias resistance, and R2 is a modulation resistance, and VAPC is a bias voltage, and VMOD is a modulation voltage.
By the result of above-mentioned expression formula, can access corresponding result as shown in Figure 5, it is linear that level signal S2 and power are adjusted signal S3, and in the present embodiment, level signal S2 and power are adjusted signal S3 and is inverse relation.In other words, when the received optical power signals S1 of the Optical Receivers 211 of optical network unit 21 is big more, then represent optical network unit 21 and optical line terminal equipment close together, so the transmitter module 214 of optical network unit 21 only need can be with message transmission to optical line terminal equipment with less transmitting power.
In addition, the control method of a kind of optical network unit of preferred embodiment of the present invention please refer to shown in Figure 6ly, and it may further comprise the steps: step S01 receives an optical power signals; Step S02 is converted to a level signal with this optical power signals; Step S03 produces a power according to this level signal and adjusts signal; Step S04 adjusts the transmitting power that signal is adjusted this optical network unit according to this power.
Because the control method of the optical network unit of preferred embodiment of the present invention illustrates in the lump at the foregoing description, so do not repeat them here.
In sum, because of being to utilize energy conversion module and adjusting module according to a kind of optical network unit of the present invention and control method thereof, and make that optical network unit can be according to the optical power signals that optical line terminal equipment transmitted, and judge and control the size of required transmitting power on one's own initiative.Compare with prior art, when the present invention is applied to EPON, can simplify the design complexities of optical line terminal equipment, and optical network unit also can be along with dynamic change, and change transmitting power at any time, to keep the optimum efficiency of message transmission.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be included in the accompanying claim its equivalent modifications of carrying out or change.
Claims (15)
1, a kind of optical network unit comprises:
One Optical Receivers is used to receive an optical power signals;
One energy conversion module is used for this optical power signals is converted to a level signal; And
One adjusting module is used for producing a power according to this level signal and adjusts signal, and its transmitting power is adjusted and adjust according to this a transmitting power of this optical network unit according to this power adjustment signal by this adjusting module.
2, optical network unit as claimed in claim 1, wherein, this level signal is a voltage signal.
3, optical network unit as claimed in claim 1, wherein, this adjusting module comprises:
One power is adjusted the loop, is used to receive this level signal, and produces this power adjustment signal; And
One drives the loop, is used for adjusting signal to adjust this transmitting power of this optical network unit according to this power.
4, optical network unit as claimed in claim 3, wherein, this power is adjusted the loop and is comprised that at least one negative feedback operational amplifier is electrically connected a bias resistance and another negative feedback operational amplifier is electrically connected a modulation resistance.
5, optical network unit as claimed in claim 1, wherein, it is a current signal that this power is adjusted signal.
6, optical network unit as claimed in claim 1, wherein, it is linear that this level signal and this power are adjusted signal.
7, optical network unit as claimed in claim 6, wherein, it is the relation of being inversely proportional to that this level signal and this power are adjusted signal.
8, optical network unit as claimed in claim 1, wherein, this adjusting module is to adjust signal according to this power, with this transmitting power of a transmitter module of adjusting this optical network unit, wherein, this transmitter module is a laser module.
9, a kind of control method of optical network unit may further comprise the steps:
Receive an optical power signals;
This optical power signals is converted to a level signal;
Produce a power according to this level signal and adjust signal; And
Adjust the transmitting power that signal is adjusted this optical network unit according to this power.
10, control method as claimed in claim 9, wherein, when this level signal was big more, then this power adjustment signal was more little.
11, control method as claimed in claim 10, wherein, this level signal is by a bias resistance, adjusts signal and produce this power.
12, control method as claimed in claim 10, wherein, this level signal is by a modulation resistance, adjusts signal and produce this power.
13, control method as claimed in claim 9, wherein, this level signal is a voltage signal.
14, control method as claimed in claim 9, wherein, it is a current signal that this power is adjusted signal.
15, control method as claimed in claim 9, wherein, it is this transmitting power of adjusting a transmitter module of this optical network unit that this power is adjusted signal, wherein, this transmitter module is a laser module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100088499A CN101026416A (en) | 2006-02-22 | 2006-02-22 | Optical network unit and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100088499A CN101026416A (en) | 2006-02-22 | 2006-02-22 | Optical network unit and its control method |
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| CN101026416A true CN101026416A (en) | 2007-08-29 |
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| CNA2006100088499A Pending CN101026416A (en) | 2006-02-22 | 2006-02-22 | Optical network unit and its control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683022A (en) * | 2013-12-02 | 2015-06-03 | 中国移动通信集团公司 | Method for regulating emitting light power in PON (Passive Optical Network), OLT (Optical Line Terminal) and system |
| CN104734784A (en) * | 2013-12-19 | 2015-06-24 | 华为技术有限公司 | Method and device for determining input light power |
| CN106507225A (en) * | 2016-10-31 | 2017-03-15 | 华为技术有限公司 | A kind of method of the reception parameter of adjustment optical line terminal and optical line terminal |
| WO2019057172A1 (en) * | 2017-09-21 | 2019-03-28 | 中兴通讯股份有限公司 | Method and device for controlling downlink optical signal, and computer readable storage medium |
-
2006
- 2006-02-22 CN CNA2006100088499A patent/CN101026416A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683022A (en) * | 2013-12-02 | 2015-06-03 | 中国移动通信集团公司 | Method for regulating emitting light power in PON (Passive Optical Network), OLT (Optical Line Terminal) and system |
| CN104734784A (en) * | 2013-12-19 | 2015-06-24 | 华为技术有限公司 | Method and device for determining input light power |
| CN104734784B (en) * | 2013-12-19 | 2017-12-22 | 华为技术有限公司 | A kind of method and apparatus for determining input optical power |
| CN106507225A (en) * | 2016-10-31 | 2017-03-15 | 华为技术有限公司 | A kind of method of the reception parameter of adjustment optical line terminal and optical line terminal |
| CN106507225B (en) * | 2016-10-31 | 2019-11-19 | 华为技术有限公司 | A kind of method and optical line terminal of the reception parameter adjusting optical line terminal |
| WO2019057172A1 (en) * | 2017-09-21 | 2019-03-28 | 中兴通讯股份有限公司 | Method and device for controlling downlink optical signal, and computer readable storage medium |
| CN109547107A (en) * | 2017-09-21 | 2019-03-29 | 中兴通讯股份有限公司 | The method, apparatus and equipment of downlink optical signal are controlled in passive optical network |
| US10958994B2 (en) | 2017-09-21 | 2021-03-23 | Zte Corporation | Method and device for controlling downlink optical signal, and computer-readable storage medium |
| CN109547107B (en) * | 2017-09-21 | 2023-08-04 | 中兴通讯股份有限公司 | Method, device and equipment for controlling downlink optical signals in passive optical network |
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Open date: 20070829 |