CN107846249A - Repeater optical-fiber time-delay measuring method and device - Google Patents
Repeater optical-fiber time-delay measuring method and device Download PDFInfo
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- CN107846249A CN107846249A CN201610833558.7A CN201610833558A CN107846249A CN 107846249 A CN107846249 A CN 107846249A CN 201610833558 A CN201610833558 A CN 201610833558A CN 107846249 A CN107846249 A CN 107846249A
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- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70754—Setting of search window, i.e. range of code offsets to be searched
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
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- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0797—Monitoring line amplifier or line repeater equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0063—Interference mitigation or co-ordination of multipath interference, e.g. Rake receivers
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- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention discloses a kind of repeater optical-fiber time-delay measuring method and device.This method includes：The first PN offset amount is measured, wherein the first PN offset amount is the PN offset amount of the most strong multipath in alms giver sector；The second PN offset amount is measured, wherein the second PN offset amount is the PN offset amount of the most strong multipath in repeater；Repeater optical-fiber time-delay is obtained according to the difference of the first PN offset amount and the second PN offset amount.The present invention is independent of any experience, and all to calculate the PN offset amount for all relying on multipath signal, the PN offset amount of multipath signal is to be based on CDMA short codes, so that test result of the present invention is very accurate.
Description
Technical field
The present invention relates to repeater delay testing field, more particularly to a kind of repeater optical-fiber time-delay measuring method and dress
Put.
Background technology
With the development of Chinese Wireless Communication, 2,3,4G development it is very fast, in existing network except using macro base station,
Beyond the equipment such as micro-base station, RRU (Radio Remote Unit, Remote Radio Unit), also use substantial amounts of repeater and set
It is standby.Repeater can play a part of signal amplification, not produce flow, equivalent to a kind of signal amplifier, for strengthening signal
Covering can play fine castering action.But the introducing of repeater, a problem, i.e. time delay are brought, if time delay is special
It is big, mobile phone searching can be caused less than the signal, turn into a kind of interference on the contrary, influence the speech quality of user.
The time delay of generally measurement repeater has 3 kinds of methods at present：
Method one：By empirical estimating repeater optical-fiber time-delay
Delay=spread fibers time delay+repeater processing delay
The μ s (being approximately equal to 6chips) of optical fiber repeater processing delay≤5.0
Propagation delay ≈ fiber lengths/(0.2km/chip) of signal in a fiber
Assuming that fiber optic stretch distance is 2km, then
Delay ≈ 5us/ (1/1.2288Mhz)+2km/ (0.2km/chips)=6+10=16chips
This is calculated based on experience value, and wherein fiber lengths are the estimations of workmen, and signal is propagated in optical fiber
Loss factor be also empirical value, or even repeater processing delay be also producer experimental data, this results in final calculating
Optical-fiber time-delay out is not an accurate data, easily cause field optimizing engineer set CDMA search windows when
Time setting is not accurate enough, and the switching for influenceing signal produces call drop.
Method two：By PN_phase values (the pseudo noise phase inside signaling PSMM message (Pilot Strength Measurement Message)
Value) just omit calculation delay.
Reference signal as shown in Figure 1 is PN453, and the signal measured is：
PN=| pilot_pn_phase/64 |=75
Chip time delay ≈ pilot_pn_phase-PN*64=0chips, equivalent to just below the base station where PN75,
Time delay can be ignored.The signal time delay for the adjacent collection the inside of measurement that this method can only be omited just, it is impossible to the time delay of measuring reference signals,
Because reference signal does not have PN_phase values inside PSMM.
Method three：Sweep generator is added to test repeater time delay using road detector off-balancesheet
The signal exactly tested using sweep generator as shown in Figure 2 and the time delay of each signal, such as most strong signal
PN=426, time delay 20chip.This method of testing is more accurate, because the frequency sweep ability of sweep generator is accurate than mobile phone
It is a lot, but it have two it is bigger the defects of：1) sweep generator is somewhat expensive, can not largely be equipped with, improper extensive
Popularization；2) sweep generator needs external power supply, and CQT (Call Quality Test, call quality test) is carried out in some rooms point
Carrying portable Shi Wufa, there is the defects of obvious.
With the extensive introducing of repeater, delay problem has become the optimization daily inevitable work of engineer
Make, above-mentioned several conventional means all respectively have the defects of respective, have impact on the optimization efficiency of frontline engineer, it is now desired to have one kind
Method supports line optimization personnel quick and accurately measures repeater time delay.
The content of the invention
In view of above technical problem, the invention provides a kind of repeater optical-fiber time-delay measuring method and device, based on more
The PN offset amount of footpath signal so that test result is very accurate.
According to an aspect of the present invention, there is provided a kind of repeater optical-fiber time-delay measuring method, including：
The first PN offset amount is measured, wherein the first PN offset amount is inclined for the pseudo noise of the most strong multipath in alms giver sector
Shifting amount；
The second PN offset amount is measured, wherein the second PN offset amount is the PN offset of the most strong multipath in repeater
Amount；
Repeater optical-fiber time-delay is obtained according to the difference of the first PN offset amount and the second PN offset amount.
In one embodiment of the invention, it is described according to the first PN offset amount and the difference of the second PN offset amount
Value, which obtains repeater optical-fiber time-delay, to be included：
Using 30 halfs of the first PN offset amount and the absolute difference of the second PN offset amount as straight
Station optical-fiber time-delay is put, wherein, the unit of the repeater optical-fiber time-delay is km.
In one embodiment of the invention, it is described according to the first PN offset amount and the difference of the second PN offset amount
Value, which obtains repeater optical-fiber time-delay, to be included：
Using 1/8th of the first PN offset amount and the absolute difference of the second PN offset amount as repeater
Optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay is chip.
In one embodiment of the invention, the first PN offset amount of the measurement includes：
Start to open under alms giver sector and exhale test, record the first PN offset amount.
In one embodiment of the invention, the second PN offset amount of the measurement includes：
Keep continuous call test, under repeater, record the second PN offset amount.
According to another aspect of the present invention, there is provided a kind of repeater optical-fiber time-delay measurement apparatus, including the first skew measure
Module, the second skew measurement module and time delay acquisition module are measured, wherein：
First skew measurement module, for measuring the first PN offset amount, wherein the first PN offset amount is to apply
The PN offset amount of the most strong multipath in host sectors；
Second skew measurement module, for measuring the second PN offset amount, wherein the second PN offset amount is straight
Put the PN offset amount for most strong multipath of standing；
Time delay acquisition module, directly put for being obtained according to the difference of the first PN offset amount and the second PN offset amount
Stand optical-fiber time-delay.
In one embodiment of the invention, time delay acquisition module is used for the first PN offset amount and the second pseudo noise
30 halfs of the absolute difference of offset as repeater optical-fiber time-delay, wherein, the repeater optical-fiber time-delay
Unit is km.
In one embodiment of the invention, time delay acquisition module is used for the first PN offset amount and the second pseudo noise
/ 8th of the absolute difference of offset are used as repeater optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay
For chip.
In one embodiment of the invention, the first skew measurement module is used to start to open under alms giver sector to exhale survey
Examination, record the first PN offset amount.
In one embodiment of the invention, the second skew measurement module is used to keep continuous call to test, under repeater,
Record the second PN offset amount.
The present invention is all to calculate the PN offset amount for all relying on multipath signal, multipath independent of any experience
The PN offset amount of signal is to be based on CDMA short codes, so that test result of the present invention is very accurate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the PSMM signalings by drive test Meter Test in one embodiment of the invention.
Fig. 2 is the schematic diagram of the CDMA chip time delays of frequency sweep Meter Test in one embodiment of the invention.
Fig. 3 is the schematic diagram of CDMA mobile phone Rank searcher receiver multipath signals in one embodiment of the invention.
Fig. 4 is the schematic diagram of optical-fiber time-delay measuring method one embodiment in repeater of the present invention.
Fig. 5 is alms giver sector and the lower schematic diagram for hanging two repeaters in one embodiment of the invention.
Fig. 6 is the schematic diagram of the PN_Offset under donor base station Wei Cun base stations in one embodiment of the invention.
Fig. 7 is the schematic diagram of the PN_Offset under drawing mill repeater in one embodiment of the invention.
Fig. 8 is the schematic diagram of the PN_Offset under filial piety H bars repeaters in one embodiment of the invention.
Fig. 9 and Figure 10 is the schematic diagram of sweep generator test result under two repeaters in one embodiment of the invention.
Figure 11 is the schematic diagram of optical-fiber time-delay measurement apparatus one embodiment in repeater of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Do not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
It is found by the applicant that：The situation of CDMA mobile phone demodulated signals is illustrated in figure 3, Fig. 3 reflections are that mobile phone searching is arrived
Signal condition, only PN168 are concentrated in activation, and PN168 is reference signal as Reference PN, and the reference signal has 3 tunnels
Finger is demodulated by the Rake receivers of mobile phone side, and neighbour is concentrated with two paths of signals and is demodulated, respectively PN220 and PN500.Contrast
This 3 PN, their difference is exactly that short code is different (PN is exactly as caused by short code), that is, (pseudo noise is inclined by PN Offset
Shifting amount) it is different, the PN Offset of PN168,220,500 correspond to 10752,14080,32000 respectively.
Fig. 4 is the schematic diagram of optical-fiber time-delay measuring method one embodiment in repeater of the present invention.Preferably, the present embodiment can
Performed by repeater optical-fiber time-delay measurement apparatus.This method comprises the following steps：
Step 401, the first PN offset amount Finger1_PN_Offset is measured, wherein the first PN offset amount
Finger1_PN_Offset is the PN offset amount of the most strong multipath in base station alms giver sector.
In one embodiment of the invention, step 401 can include：Start to open under alms giver sector and exhale test, record
First PN offset amount Finger1_PN_Offset.
Step 402, the second PN offset amount Finger2_PN_Offset is measured, wherein the second PN offset amount
Finger2_PN_Offset is the PN offset amount of the most strong multipath in repeater.
In one embodiment of the invention, step 402 can include：Keep continuous call test, under repeater, record the
Two PN offset amount Finger2_PN_Offset.
In the above embodiment of the present invention, in step 401 and 102, all multipaths are all derived under base station or repeater
Most strong multipath, other multipaths are all catadioptric multipaths, are had little significance.
Step 403, according to the first PN offset amount Finger1_PN_Offset and the second PN offset amount
Finger2_PN_Offset difference obtains repeater optical-fiber time-delay.
In one embodiment of the invention, step 403 can include：By the first PN offset amount and the second pseudo noise
30 halfs of the absolute difference of offset as repeater optical-fiber time-delay, wherein, the repeater optical-fiber time-delay
Unit is km.
That is, step 403 can include：Repeater optical-fiber time-delay Delay (km) is determined according to formula (1).
Delay (km)=| Finger1_PN_Offset-Finger2_PN_Offset |/32 (1)
In another embodiment of the invention, step 403 can include：By the first PN offset amount and the second pseudo noise
/ 8th of the absolute difference of offset are used as repeater optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay
For chip.
That is, step 403 can include：Repeater optical-fiber time-delay Delay (chip) is determined according to formula (2).
Delay (chip)=| Finger1_PN_Offset-Finger2_PN_Offset |/8 (2)
Wherein, Chip (chip)：Least unit after useful signal spread spectrum, system is by spread spectrum bits switch into code
Piece.Conventional spreading format is to be multiplied with a PN sequence (PN sequences) with arrowband psk signal.PN sequences are generally used
Symbol C represents that a PN sequence is an orderly binary code stream being made up of 1 and 0, and therein 1 and 0 due to not carrying letter
Breath, therefore it is not referred to as bit and referred to as chip (chip).1chip is equivalent to 0.78us or 244m.
The repeater optical-fiber time-delay measuring method provided based on the above embodiment of the present invention, signal caused by repeater is made
For a multipath signal (i.e. finger all the way), signal caused by alms giver sector is as another way multipath signal (i.e. another way
Finger), using two-way finger PN_Offset relative difference, the optical-fiber time-delay of repeater is calculated.
The above embodiment of the present invention is special using the multipath of cdma wireless signal on the basis of CDMA theories are fully understood
Property, using the theory of relativity rule, meet that field optimizing engineer need not carry any sweep generator, without optical cable construction demographic
The length that optical cable uses, it is only necessary to optical-fiber time-delay can be carried out to repeater at the beginning of development by common drive test instrument and tested, just
Accurate repeater optical-fiber time-delay can be drawn.The realization of the above function, it is relative depending on multipath signal PN_Offset
Difference, it is very accurate, in place of accurate, quick, the convenient most critical for being only this invention.
Step 401 and 102 in the above embodiment of the present invention can be performed by common drive test instrument.
The above embodiment of the present invention possesses following advantage：
1st, inherently a kind of estimation of traditional cable length measurement, it is not that very precisely, synchronous signal is in a fiber
What propagation coefficient relied on is empirical value, increases inaccurate factor again.The method of the above embodiment of the present invention is independent of any warp
Test, all to calculate the PN_Offset for all relying on multipath signal, it is to be based on CDMA short codes, and test result is very accurate.
2nd, traditional foundation PSMM Signalling methods calculate the mode of signal time delay, itself limitation：Adjacent area can only be measured
Signal, can not measuring reference signals time delay.The method of the above embodiment of the present invention is independent of PSMM signalings, so both can be with
The signal for measuring adjacent area can also measuring reference signals.
The 3rd, although traditional method comparison using sweep generator measurement repeater optical-fiber time-delay is accurate, equipment cost
Height, can not large-scale promotion, while need under automobile scenarios provide power supply aptitude test.It is distributed under scene and carries out indoors
CQT can not just provide power supply when testing, and can not easily carry out test.And the method for this above embodiment of the present invention is independent of it
Its extras, using common drive test instrument, generalization is strong, and convenience is strong.
4th, the relative rule of the multipath signal of this above embodiment of the present invention is by the accurate, ripe straight of practice test
Put station optical-fiber time-delay measuring technology.Such as during routine optimization, all optimization engineers in Changzhou are using
The technology measures repeater optical-fiber time-delay, and the search window of network is all set in the time delay come out using the technical testing, has been made
With more than 2 years, accuracy rate 100%.
In the step 402 of the above embodiment of the present invention, repeater can have it is multiple, corresponding to the feelings for having multiple repeaters
Shape, step 402 can include the second PN offset amount for determining each repeater respectively.Then in step 403, for every
Individual repeater, respectively according to its second PN offset amount and the optical fiber of the mathematic interpolation repeater of the first PN offset amount
Time delay.
The repeater optical-fiber time-delay measuring method of above-described embodiment is illustrated below by specific example：
The present invention utilizes the relative rule of multipath signal, and the application of reality has been carried out in existing network.By taking Fig. 5 as an example, Wei Cun
Base station is alms giver sector, drawing mill and filial piety all H bars be all on be linked to the repeater of Wei Cun alms giver sector.
Firstth, the step of implementing according to Fig. 4 is surveyed under Wei Cun alms giver sector, drawing mill repeater and filial piety all H bars repeaters
The 3 road Finger tried PN_Offset is respectively：
As shown in fig. 6, the PN offset amount Finger1_PN_Offset=of the most strong multipath under Wei Cun alms giver sector
36227。
As shown in fig. 7, the PN offset amount Finger2_PN_Offset=of the most strong multipath under drawing mill repeater
36390。
As shown in figure 8, the PN offset amount Finger3_PN_Offset of the most strong multipath under filial piety all H bars repeater
=36492.
Elongatedness when the secondth, calculating repeater optical cable according to relative rule.
Elongatedness (chip) is during the optical cable of drawing mill repeater：
|Finger1_PN_Offset-Finger2_PN_Offset|/8
=(| 36227-36390 |)/8=20.375chips.
Filial piety all H bars repeater optical cable when elongatedness (chip) be：
|Finger1_PN_Offset-Finger3_PN_Offset|/8
=(| 36227-36492 |)/8=33.125chips.
Elongatedness (km) is during the optical cable of drawing mill repeater：
|Finger1_PN_Offset-Finger2_PN_Offset|/32
=(| 36227-36390 |)/32=5.1KM.
Filial piety all H bars repeater optical cable when elongatedness (km) be：
|Finger1_PN_Offset-Finger3_PN_Offset|/32
=(| 36227-36492 |)/32=8.2KM；
Applicant also utilizes sweep generator under drawing mill repeater and filial piety H bars repeaters to our relative rule result
Verified：
The result is found：It is very high with respect to the rule degree of accuracy, the time delay calculated according to relative rule (chip and
Km all it is) fairly precise, (sweep generator may be only accurate to the sweep generator test result for being even more than as shown in Figure 9 and Figure 10
Integer-bit, decimal place can not be accurate to).
There is the characteristics of multipath in the above embodiment of the present invention, produced with reference to PN in CDMA technology by using radio signal propagation
Raw principle, using the PN_Offset of wireless signal multipath, a kind of multipath has independently been invented with respect to rule, it is achieved thereby that
Time delay caused by the optical fiber of repeater can be quick and precisely measured under any any repeater scene of environment, is really optimization work
Cheng Shi realizes fast and accurately positioning means.
Figure 11 is the schematic diagram of optical-fiber time-delay measurement apparatus one embodiment in repeater of the present invention.As shown in figure 11, it is described
Repeater optical-fiber time-delay measurement apparatus can include first skew measurement module 100, second offset measurement module 200 and when
Prolong acquisition module 300, wherein：
First skew measurement module 100, for measuring the first PN offset amount, wherein the first PN offset amount is
The PN offset amount of the most strong multipath in alms giver sector.
In one embodiment of the invention, the first skew measurement module 100 can be used under alms giver sector starting
Open and exhale test, record the first PN offset amount.
Second skew measurement module 200, for measuring the second PN offset amount, wherein the second PN offset amount is
The PN offset amount of the most strong multipath in repeater.
In one embodiment of the invention, the second skew measurement module 200 can be used for keeping continuous call test, straight
Put under station, record the second PN offset amount.
Time delay acquisition module 300, obtained for the difference according to the first PN offset amount and the second PN offset amount
Repeater optical-fiber time-delay.
In one embodiment of the invention, time delay acquisition module 300 can be used for the first PN offset amount and the
30 halfs of the absolute difference of two PN offset amounts as repeater optical-fiber time-delay, wherein, the repeater light
The unit of fine time delay is km.
In another embodiment of the invention, time delay acquisition module 300 can be used for the first PN offset amount and the
/ 8th of the absolute difference of two PN offset amounts are used as repeater optical-fiber time-delays, wherein, during the repeater optical fiber
The unit prolonged is chip.
In one particular embodiment of the present invention, time delay acquisition module 300 can be used for determining directly to put according to formula (1)
Stand and optical-fiber time-delay Delay (km) or repeater optical-fiber time-delay Delay (chip) is determined according to formula (2).
The repeater optical-fiber time-delay measurement apparatus provided based on the above embodiment of the present invention, open in optimization engineer and directly put
Stand test when, under alms giver sector and repeater signal carry out test, using wireless signal multipath characteristics, using relative
Rule fast and accurately tests repeater optical-fiber time-delay.
In the above embodiment of the present invention, all multipaths are all derived from the most strong multipath under base station or repeater, other more
Footpath is all catadioptric multipath, is had little significance.
In the above embodiment of the present invention, the first skew measurement module 100 and second offsets the function of measurement module 200
It can be realized by common drive test instrument.
Time delay acquisition module 300 described above can be implemented as performing the general of function described herein
Processor, programmable logic controller (PLC) (PLC), digital signal processor (DSP), application specific integrated circuit (ASIC), scene can compile
Journey gate array (FPGA) either other PLDs, discrete gate or transistor logic, discrete hardware components or
It is any appropriately combined by person.
In the above embodiment of the present invention, corresponding to the situation for having multiple repeaters, the second skew measurement module 200 can be with
For determining the second PN offset amount of each repeater respectively；Time delay acquisition module 300 can be used for for each directly putting
Stand, respectively according to the optical fiber of its second PN offset amount repeater corresponding to the mathematic interpolation of the first PN offset amount when
Prolong.
The main purpose and effect that the above embodiment of the present invention to be reached include：
1st, by the above embodiment of the present invention, after repeater is opened, optimization engineer need not inquire optical cable construction personnel's light
The length of cable.
2nd, by the above embodiment of the present invention, optimization engineer finds PSMM message without playing back signaling again.
3rd, by the above embodiment of the present invention, sweep generator need not be carried when optimizing engineer's on-the-spot test, directly using general
Path surveys instrument, so as to greatly reduce equipment cost, while also improves operating efficiency.
4th, by the above embodiment of the present invention, optimization engineer can be according to the PN_ that each road multipath is read in drive test instrument
Offset, relative rule is then utilized, easily calculate the time delay of repeater.
5th, the time delay that directly can be calculated by the above embodiment of the present invention, optimization engineer according to scene, you can logical
Know that background net management sets out accurate search window according to the time delay.
So far, the present invention is described in detail.In order to avoid the design of the masking present invention, it is public that this area institute is not described
Some details known.Those skilled in the art as described above, can be appreciated how to implement technology disclosed herein completely
Scheme.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
Description of the invention provides for the sake of example and description, and is not exhaustively or by the present invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Select and retouch
State embodiment and be to more preferably illustrate the principle and practical application of the present invention, and one of ordinary skill in the art is managed
The present invention is solved so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (10)
- A kind of 1. repeater optical-fiber time-delay measuring method, it is characterised in that including：The first PN offset amount is measured, wherein the first PN offset amount is the PN offset of the most strong multipath in alms giver sector Amount；The second PN offset amount is measured, wherein the second PN offset amount is the PN offset amount of the most strong multipath in repeater；Repeater optical-fiber time-delay is obtained according to the difference of the first PN offset amount and the second PN offset amount.
- 2. according to the method for claim 1, it is characterised in that described according to the first PN offset amount and the second pseudo noise The difference of offset, which obtains repeater optical-fiber time-delay, to be included：Using 30 halfs of the first PN offset amount and the absolute difference of the second PN offset amount as repeater Optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay is km.
- 3. according to the method for claim 1, it is characterised in that described according to the first PN offset amount and the second pseudo noise The difference of offset, which obtains repeater optical-fiber time-delay, to be included：Using 1/8th of the first PN offset amount and the absolute difference of the second PN offset amount as repeater optical fiber Time delay, wherein, the unit of the repeater optical-fiber time-delay is chip.
- 4. according to the method any one of claim 1-3, it is characterised in that the first PN offset amount bag of the measurement Include：Start to open under alms giver sector and exhale test, record the first PN offset amount.
- 5. according to the method for claim 4, it is characterised in that the second PN offset amount of the measurement includes：Keep continuous call test, under repeater, record the second PN offset amount.
- 6. a kind of repeater optical-fiber time-delay measurement apparatus, it is characterised in that including the first skew measurement module, the second offset Measurement module and time delay acquisition module, wherein：First skew measurement module, for measuring the first PN offset amount, wherein the first PN offset amount is fanned for alms giver The PN offset amount of the most strong multipath in area；Second skew measurement module, for measuring the second PN offset amount, wherein the second PN offset amount is repeater The PN offset amount of most strong multipath；Time delay acquisition module, repeater light is obtained for the difference according to the first PN offset amount and the second PN offset amount Fine time delay.
- 7. device according to claim 6, it is characterised in thatTime delay acquisition module is used for 32 by the first PN offset amount and the absolute difference of the second PN offset amount / mono- is used as repeater optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay is km.
- 8. device according to claim 6, it is characterised in thatTime delay acquisition module is used for the eight of the first PN offset amount and the absolute difference of the second PN offset amount/ One is used as repeater optical-fiber time-delay, wherein, the unit of the repeater optical-fiber time-delay is chip.
- 9. according to the device any one of claim 6-8, it is characterised in thatFirst skew measurement module is used to start to open under alms giver sector to exhale test, records the first PN offset amount.
- 10. device according to claim 9, it is characterised in thatSecond skew measurement module is used to keep continuous call to test, and under repeater, records the second PN offset amount.
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