CN1972158A - Optical fiber network measurement system and measurement method - Google Patents
Optical fiber network measurement system and measurement method Download PDFInfo
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- CN1972158A CN1972158A CNA2005101260331A CN200510126033A CN1972158A CN 1972158 A CN1972158 A CN 1972158A CN A2005101260331 A CNA2005101260331 A CN A2005101260331A CN 200510126033 A CN200510126033 A CN 200510126033A CN 1972158 A CN1972158 A CN 1972158A
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Abstract
This invention relates to fiber network measurement system, which comprises several network units and light circuit terminal, wherein, system comprises signal generation device, signal align device and measurement device; signal generation device generates data signals and control signals and sends these to network units; signal align device sends control signals to one unit at first time and to other unit at second time; unit receives control signals and sends them to light circuit terminal and the measurement device measures received data signals.
Description
Technical field
The present invention system relates to a kind of measuring system and method for measurement, particularly a kind of measuring system of fiber optic network and method of measurement.
Background technology
Along with the fast development of world-wide web, the user also significantly increases for the demand of bandwidth, and therefore, the fiber optic network with high bandwidth becomes one of optimal selection that solves the network bandwidth.
Fig. 1 is a kind of schematic diagram of existing fiber optic network.Generally speaking, this fiber optic network is that (Passive Optical Network, PON), it is some structure to multiple spot (P2MP) to a kind of EPON.Fiber optic network 1 has a plurality of optical network units (OpticalNetwork Unut basically, ONU) 11 and optical line terminal (Optical Line Terminal, OLT) 12, wherein, fiber optic network 1 can adopt time division multiple access (Time Division Multiple Access, TDMA) mode, therefore, after these network element 11 of fiber optic network 1 are finished registration, be assigned to a time slot (Time Slot) separately, as exclusive transmitting time, allow each network element 11 only could send package at exclusive time slot, produce with the situation of avoiding data collision.
Generally speaking, when hope is tested (for example, the error rate, sensitivity etc.) to fiber optic network 1, usually at each network element 11 place's configuration signal generation device 13, so that control signal 131 and data-signal 132 to be provided, and both deliver to these network element 11 synchronously.Wherein, control signal 131 is in order to Control Network unit 11, make it that data-signal 132 is converted to light signal 131 ' and is sent to optical line terminal 12, and at optical line terminal 12 place's allocating and measuring devices 14, after this optical line terminal 12 receives the light signal 131 ' that transmits from these network element 11, convert light signal 131 ' to the corresponding signal of telecommunication 131 ", again by 14 pairs of signals of telecommunication 131 of measurement mechanism " measure, judge the sensitivity and the error rate of fiber optic network 1 thus.But, above-mentioned metering system needs a plurality of signal generation devices 13, producing control signal 131 and data-signal 132 respectively, thereby measure, therefore, when if fiber optic network 1 has 32 network element 11, will use 32 signal generation devices 13 just can carry out the measurement of fiber optic network, yet signal generation device 13 is comparatively expensive equipment, therefore, use aforesaid way will cause whole raising of measuring cost.
Therefore, how providing a kind of measuring system and method for measurement of easy fiber optic network, reduce the effect of measuring cost to reach, is one of current important topic.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of measuring system and method for measurement of fiber optic network, to reduce the whole cost of measuring.
Thus, in order to achieve the above object, according to the measuring system of fiber optic network of the present invention, this fiber optic network has a plurality of network element and optical line terminal, and this measuring system comprises signal generation device, signal distribution equipment and measurement mechanism.Wherein, signal generation device is used to produce data-signal and control signal, and data-signal delivered to these network element, signal distribution equipment receives control signal, and control signal is delivered to one of these network element, and another network element among control signal being delivered to these network element in second time in the very first time; Measurement mechanism is electrically connected to optical line terminal, and wherein, network element is delivered to optical line terminal with data-signal after receiving control signal, and measurement mechanism is measured the data-signal that optical line terminal received.
Thus, in order to achieve the above object, according to the method for measurement of fiber optic network of the present invention, wherein, this fiber optic network has a plurality of network element and optical line terminal, and this method of measurement comprises the following steps: respectively data-signal to be offered these network element; And in the very first time, provide control signal to deliver to one of these network element, and one of this network element is sent to optical line terminal to data-signal; And in second time, control signal is delivered to another network element among these network element, this network element is sent to optical line terminal to data-signal; And the received data-signal of optical line terminal measured.
In sum, measuring system and method for measurement according to fiber optic network of the present invention are at different time this control signal to be delivered to one of these network element by signal distribution equipment, to control one of these network element data-signal is sent to optical line terminal, transmission means in order to the simulation time division multiple access, and, measurement mechanism is measured the received data-signal of optical line terminal, to judge the error rate and the sensitivity of fiber optic network, compared with prior art, the measuring system of fiber optic network of the present invention and method of measurement only need a signal generation device to measure fiber optic network, reduce the whole effect of measuring cost thereby reach.
Description of drawings
Fig. 1 is a kind of schematic diagram of measuring system of existing fiber optic network;
Fig. 2 is the schematic diagram of the measuring system of fiber optic network according to a preferred embodiment of the present invention; And
Fig. 3 is the wave mode schematic diagram of each signal of signal distribution equipment of the measuring system of fiber optic network according to a preferred embodiment of the present invention.
The element numbers explanation:
1-fiber optic network 11-network element
12-optical line terminal 13-signal generation device
131-control signal 131 '-light signal
131 "-signal of telecommunication 132-data-signal
14-measurement mechanism 2-measuring system
3-fiber optic network ONU
1～ONU
n-network element
OLT-optical line terminal 21-signal generation device
22-measurement mechanism 23-signal distribution equipment
24-frequency divider 31-data-signal
31 '-light signal 31 "-signal of telecommunication
32-control signal 33-clock pulse signal
D
1～D
n-triggering I
1～I
n-signal input part
Q
1～Q
n-output C
k-trigger end
T
1-very first time T
2-the second time
T
3-Di three time T
4Four times of-Di
Embodiment
Hereinafter with reference to relevant indicators, the measuring system and the method for measurement of according to a preferred embodiment of the invention fiber optic network described.
As shown in Figure 2, it is the schematic diagram of measuring system of the fiber optic network of the preferred embodiments of the present invention.
Fiber optic network 3 is that (Passive Optical Network, PON), fiber optic network 3 has a plurality of network element ONU to EPON
1～ONU
nAnd optical line terminal OLT.These network element ONU
1～ONU
nOptical fiber by many different lengths is connected to optical line terminal OLT, to constitute fiber optic network 3.
The measuring system 2 of present embodiment can be used for the sensitivity and the error rate of above-mentioned fiber optic network 3 are measured.Measuring system 2 comprises signal generation device 21, measurement mechanism 22 and signal distribution equipment 23.Wherein, signal generation device 21 be the impulse waveform generator (Pulse PatternGenerator, PPG), in order to produce data-signal 31, control signal 32 and clock pulse signal 33.Signal generation device 21 and these network element ONU
1～ONU
nLink to each other, in order to data-signal 31 and control signal 32 are offered these network element ONU
1～ONU
nWherein, data-signal 31 is as the data-signal of test usefulness, and control signal 32 is in order to drive these network element ONU
1～ONU
n, as these network element ONU
1～ONU
nAfter receiving control signal 32, convert data-signal 31 to light signal 31 ', light signal 31 ' is sent to this optical line terminal OLT to see through optical fiber.In addition, after optical line terminal OLT receives light signal 31 ', can produce the corresponding signal of telecommunication 31 " according to light signal 31 '.
Measurement mechanism 22 is electrically connected to optical line terminal OLT, in order to the signal of telecommunication 31 " measure, and according to the signal of telecommunication 31 " sensitivity and the error rate of fiber optic network 3 are judged.
The measurement mechanism 22 of present embodiment be data debug device (Error Detector, ED).Measurement mechanism 22 is obtained synchronously with signal generation device 21, and the data-signal 31 and the signal of telecommunication 31 that signal generation device 21 is produced " compare, can learn the error rate and the receiving sensitivity of fiber optic network 3.
23 pairs of control signals 32 of signal distribution equipment receive, and respectively with these network element ONU
1～ONU
nLink to each other, signal distribution equipment 23 is shift registers, and it in the different time, is these network element ONU for can simulate time division multiple access way
1～ONU
nOne of control signal 32 is provided, in order to control these network element ONU
1～ONU
nIn the different time data-signal 31 is sent to optical line terminal OLT, to measure.In the present embodiment, signal distribution equipment 23 has n trigger D
1～D
n
These triggers D
1～D
nBe D flip-flop, it has signal input part I
1～I
n, at least one output Q
1～Q
nWith trigger end C
kThese triggers D
1～D
nQuantity depend on these network element ONU
1～ONU
nQuantity, thereby make these triggers D
1～D
nOutput Q
1～Q
nJust corresponding these network element ONU
1～ONU
n
The connected mode of the signal distribution equipment 23 of present embodiment is as follows: trigger D
1Input I
1Be connected to signal generation device 21, to receive control signal 32.Trigger D
1Output Q
1Be connected to trigger D
2Input I
2, trigger D
2Output Q
2Be connected to trigger D
3Input I
3, by that analogy, until trigger D
N-1Output Q
N-1Be connected to trigger D
nInput I
nAnd these triggers D
1～D
nTrigger end C
kBe connected to the clock pulse signal 33 of signal generation device 21 jointly, as these triggers D
1～D
nTriggering signal.In addition, network element ONU
1Be connected to trigger D
1Output Q
1, network element ONU
2Be connected to trigger D
2Output Q
2, network element ONU
3Be connected to trigger D
3Output Q
3, by that analogy.
Because the characteristic of D flip-flop itself, D flip-flop can afterwards, be delivered to output with the signal of input receiving triggering signal (can be positive edge trigger or bear edge and trigger), therefore, when a plurality of D flip-flops are connected in series, can form shift register.
Figure 3 shows that the wave mode schematic diagram of the output signal of signal distribution equipment 23.At this, for the sake of simplicity, only show output Q
1～Q
4Output signal.The manner of execution of signal distribution equipment 23 is as follows: at trigger D
1Input I
1Receive the control signal 32 that signal generation device 21 produced (, supposing that control signal 32 is high level signal) afterwards, at very first time T at this
1, trigger D
1Output Q
1Control signal 32 is offered network element ONU
1, in second time T
2, trigger D
2Output Q
2Control signal 32 is offered network element ONU
2, in the 3rd time T
3, trigger D
3Output Q
3Control signal 32 is offered network element ONU
3, in the 4th time T
4, trigger D
4Output Q
4Control signal 32 is offered network element ONU
4, by that analogy, make signal distribution equipment 23 in the different time, be these network element ONU
1～ONU
nOne of control signal 32 is provided, with the simulation time division multiple access way.
The method of measurement of the measuring system 2 of present embodiment is as follows: at first, signal generation device 21 produces data-signal 31 to these network element ONU
1～ONU
nThen, signal distribution equipment 23 is at very first time T
1Control signal 32 is offered network element ONU
1, in order to drive network element ONU
1Data-signal 31 is sent to optical line terminal OLT.In second time T
2The place, signal distribution equipment 23 offers network element ONU to control signal 32
2, in order to drive network element ONU
2Data-signal 31 is sent to optical line terminal OLT.In the 3rd time T
3The place, signal distribution equipment 23 offers network element ONU to control signal 32
3, in order to drive network element ONU
3Data-signal 31 is sent to optical line terminal OLT, by that analogy, can makes these network element ONU
1～ONU
nIn the different time, convert data-signal 31 to light signal 31 ' respectively and be sent to optical line terminal OLT, can reach the mode of simulation time division multiple access, and measurement mechanism 22 is again with the signal of telecommunication 31 that optical line terminal OLT produced " data-signal 31 that produced with signal generation device 21 compares, and can learn the error rate of this fiber optic network 3.In addition, measurement mechanism 22 is measured the signals of telecommunication 31 " watt level, can learn the sensitivity of this fiber optic network 3.
In addition, the measuring system 2 of present embodiment also comprises frequency divider 24, and it is connected between signal generation device 21 and the signal distribution equipment 23.Because the frequency of the clock pulse signal 33 that signal generation device 21 is produced may not be inconsistent with needed frequency, therefore can carry out frequency division by 24 pairs of clock pulse signals of frequency divider 33, thereby after the clock pulse signal 33 that obtains appropriate frequency, deliver to again in the signal distribution equipment 23, as these triggers D
1～D
nTriggering signal.
In sum, measuring system and method for measurement according to fiber optic network of the present invention are to produce corresponding control signal by signal distribution equipment according to data-signal, and control signal is delivered to one of these network element in the different time, to control one of these network element data-signal is reached optical line terminal, transmission means with the simulation time division multiple access, and, measurement mechanism is measured the data-signal that optical line terminal received, to judge the error rate and the sensitivity of fiber optic network, compared with prior art, the measuring system of fiber optic network of the present invention and method of measurement only need a signal generation device to measure fiber optic network, reduce the whole effect of measuring cost to reach.
The above only is illustrative, and not restrictive.Anyly do not break away from spirit of the present invention and scope and, all should be included in the accompanying claim its equivalent modifications of carrying out or change.
Claims (17)
1. the measuring system of a fiber optic network, this fiber optic network has a plurality of network element and optical line terminal, and this measuring system comprises:
Signal generation device, it produces data-signal and control signal, and data-signal is delivered to these network element;
Signal distribution equipment, it receives control signal, and in the very first time control signal is delivered to one of these network element, another network element among control signal being delivered to these network element in second time; And
Measurement mechanism, it is electrically connected to optical line terminal, wherein, after network element receives control signal, data-signal is delivered to optical line terminal, and measurement mechanism is measured the received data-signal of optical line terminal.
2. the measuring system of fiber optic network according to claim 1, wherein, described signal generation device is the impulse waveform generator.
3. the measuring system of fiber optic network according to claim 1, wherein, described signal distribution equipment is a shift register.
4. the measuring system of fiber optic network according to claim 3, wherein, described shift register has a plurality of triggers, respectively corresponding these network element of the output of these triggers.
5. the measuring system of fiber optic network according to claim 4, wherein, described trigger system is a D flip-flop.
6. the measuring system of fiber optic network according to claim 1, wherein, described fiber optic network is an EPON.
7. the measuring system of fiber optic network according to claim 1, wherein, described measurement mechanism is a data debug device.
8. the measuring system of fiber optic network according to claim 1, wherein, described measurement mechanism is judged the sensitivity of described fiber optic network according to the received described data-signal of described optical line terminal.
9. the measuring system of fiber optic network according to claim 1, wherein, described measurement mechanism is judged the error rate of described fiber optic network according to the received described data-signal of described optical line terminal.
10. the measuring system of fiber optic network according to claim 1, wherein, described signal generation device also produces clock pulse signal to described signal distribution equipment.
11. the measuring system of fiber optic network according to claim 10 also comprises frequency divider, it is connected between described signal generation device and the described signal distribution equipment, after described clock pulse signal is carried out frequency division, delivers to described signal distribution equipment.
12. the method for measurement of a fiber optic network, wherein, fiber optic network has a plurality of network element and optical line terminal, and described method of measurement comprises the following steps:
Respectively data-signal is offered these network element;
In the very first time, provide control signal to deliver to one of these network element, and one of described network element is sent to described optical line terminal to described data-signal;
In second time, described control signal is delivered to another network element among these network element, and another network element among the described network element is sent to described optical line terminal to described data-signal; And
The described data-signal that described optical line terminal is received is measured.
13. the method for measurement of fiber optic network according to claim 12 wherein, offers the step of these network element to described control signal, is to provide described control signal by shift register.
14. the method for measurement of fiber optic network according to claim 12, wherein, described fiber optic network is an EPON.
15. the method for measurement of fiber optic network according to claim 12 wherein, to the step that the received described data-signal of described optical line terminal is measured, is by data debug device described data-signal to be measured.
16. the method for measurement of fiber optic network according to claim 12 wherein, to the step that the received described data-signal of described optical line terminal is measured, is according to described data-signal the sensitivity of described fiber optic network to be judged.
17. the method for measurement of fiber optic network according to claim 12 wherein, to the step that the received described data-signal of described optical line terminal is measured, is according to described data-signal the error rate of described fiber optic network to be judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101260331A CN1972158A (en) | 2005-11-24 | 2005-11-24 | Optical fiber network measurement system and measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101260331A CN1972158A (en) | 2005-11-24 | 2005-11-24 | Optical fiber network measurement system and measurement method |
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| Publication Number | Publication Date |
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| CN1972158A true CN1972158A (en) | 2007-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304571A (en) * | 2020-10-23 | 2021-02-02 | 长飞光纤光缆股份有限公司 | Multiplexing device and method for testing light source |
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2005
- 2005-11-24 CN CNA2005101260331A patent/CN1972158A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304571A (en) * | 2020-10-23 | 2021-02-02 | 长飞光纤光缆股份有限公司 | Multiplexing device and method for testing light source |
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Open date: 20070530 |