CN108809617A - A kind of delay compensation method and terminal - Google Patents
A kind of delay compensation method and terminal Download PDFInfo
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- CN108809617A CN108809617A CN201810350444.6A CN201810350444A CN108809617A CN 108809617 A CN108809617 A CN 108809617A CN 201810350444 A CN201810350444 A CN 201810350444A CN 108809617 A CN108809617 A CN 108809617A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
- H04L7/0033—Correction by delay
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Abstract
A kind of delay compensation method of offer of the embodiment of the present invention and terminal, for solving, there are delay problems in signals transmission for communication equipment in the prior art.This method includes：After the first terminal electrifying startup, it obtains and carries out the synchronizing information that the second terminal of fiber optic communication is sent with the first terminal, and time synchronization is carried out according to the synchronizing information and the second terminal, the synchronizing information includes that the first time of test signal is sent for characterizing the second terminal；After synchronous with the second terminal, the test signal that the second terminal is sent is received, the transmission duration of the test signal is determined according to the first time and the time for receiving the test signal；The time difference between the transmission duration and Preset Transfer duration is calculated, delay compensation is carried out to the signal that the second terminal is sent according to the time difference.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of delay compensation method and terminal.
Background technology
In a communications system, data interaction can be carried out by corresponding network between different communication equipment.But due to not
With communication equipment hardware there are in some inevitable othernesses and communication equipment control chip power-on and power-off or design
In can all have difference for signal transmission time delay, therefore, it is more apparent to design its time difference for complicated system.
Currently, many communication systems are very high for the precision requirement of time delay, it is folded in particular for cascading or doing signal
The communication equipment added.It is shaken in order to avoid the signal time delay of each randomness, some communication systems are mainly by hardware aspect
Overspending designs to test the shake of time delay, and then compensates；Or a large amount of operation is carried out to avoid the shake of time delay.
In summary, the more serious situation of communication equipment time delay present in signals transmission is also in the prior art
Not compared with effective solution scheme.
Invention content
A kind of delay compensation method of offer of the embodiment of the present invention and terminal are being believed for solving communication equipment in the prior art
There are delay problems in number transmission process.
In a first aspect, the embodiment of the present invention provides a kind of delay compensation method, it is applied to first terminal, this method includes：
After the first terminal electrifying startup, the second terminal transmission that fiber optic communication is carried out with the first terminal is obtained
Synchronizing information, and time synchronization is carried out according to the synchronizing information and the second terminal, the synchronizing information includes use
In the first time for characterizing the second terminal transmission test signal；
After synchronous with the second terminal, the test signal that the second terminal is sent is received, according to described the
One time and the time for receiving the test signal determine the transmission duration of the test signal；
The time difference between the transmission duration and Preset Transfer duration is calculated, according to the time difference to described the
The signal that two terminals are sent carries out delay compensation.
Optionally, the transmission duration that the test signal is determined according to the first time, including：
The delivery time that the test signal is determined according to the first time, the timing since the delivery time；
When receiving the test signal, obtains and stop timing；
The corresponding transmission duration of the test signal is determined according to the duration of record.
Optionally, the test signal is the high pulse signal that amplitude is more than default amplitude.
Optionally, before receiving the test signal that the second terminal is sent, the method further includes：
According to the downlink free time section between synchronizing information determination and the second terminal；
In downlink free time section, detect whether that there are the pulse signals that amplitude is more than default amplitude；
The test signal that the second terminal is sent is received, including：
It determines in free time section there are when the high pulse signal, receiving the high pulse signal, and will connect
The high pulse signal of receipts is as the test signal.
Second aspect, the embodiment of the present invention provide a kind of delay compensation method, are applied to second terminal, including：
Determine uplink free time section；
According to the uplink free time section and system time generate synchronizing information, the synchronizing information include for
First terminal sends the first time of test signal, in the uplink free time section at the time of indicated by the first time
Interior, being established between the second terminal and the first terminal has optical fiber connection；
The synchronizing information is transferred to the first terminal by optical fiber, so that the first terminal is according to described first
Time and the time of the test signal is received to determine for dock a number time delay difference for progress delay compensation of collecting mail.
Optionally, after the synchronizing information is transferred to the first terminal by optical fiber, the method further includes：
Determine that current time reaches the first time；
By optical fiber the test signal is sent to the first terminal.
Optionally, the test signal is the high pulse signal that amplitude is more than default amplitude.
The third aspect, the embodiment of the present invention provide a kind of terminal, including：
Time synchronization module, for after first terminal electrifying startup, obtaining and carrying out fiber optic communication with the first terminal
The synchronizing information that sends of second terminal, and time synchronization is carried out according to the synchronizing information and the second terminal, it is described same
Step information includes that the first time of test signal is sent for characterizing the second terminal；
Receiving module, the test letter sent for after synchronous with the second terminal, receiving the second terminal
Number, the transmission duration of the test signal is determined according to the first time and the time for receiving the test signal；
Delay compensation module, for calculating the time difference between the transmission duration and Preset Transfer duration, according to institute
It states time difference and delay compensation is carried out to the signal that the second terminal is sent.
Optionally, the test signal is the high pulse signal that amplitude is more than default amplitude.
Optionally, the terminal further includes：
Time-delay calculation module, the delivery time for determining the test signal according to the first time, from the hair
It send and starts timing constantly, when receiving the test signal, obtain and stop timing；
The receiving module is used to determine the corresponding transmission duration of the test signal according to the duration of record.
Optionally, the receiving module is additionally operable to：
Before receiving the test signal that the second terminal is sent, determined with described second eventually according to the synchronizing information
Downlink free time section between end, and in downlink free time section, detect whether that there are amplitudes to be more than default amplitude
Pulse signal；
It determines in free time section there are when the high pulse signal, receiving the high pulse signal, and will connect
The high pulse signal of receipts is as the test signal.
Fourth aspect, the embodiment of the present invention provide a kind of terminal, including：
It can determine module, the uplink free time section for determining second terminal；
Time synchronization module, it is described same for generating synchronizing information according to uplink free time section and system time
Step information includes sending the first time of test signal to first terminal for second terminal, at the time of indicated by the time
Being established in uplink free time section, between the second terminal and the first terminal has optical fiber connection；
Sending module, for the synchronizing information to be transferred to the first terminal by optical fiber, so that described first is whole
End is determined according to the first time and the time of the reception test signal for docking number progress delay compensation of collecting mail
Time delay difference.
Optionally, the sending module is specifically used for：
Determine that current time reaches the first time；
By optical fiber the test signal is sent to the first terminal.
Optionally, the test signal is the high pulse signal that amplitude is more than default amplitude.
5th aspect, the embodiment of the present invention provide a kind of computer installation, and the computer installation includes processor, described
Such as first aspect and second aspect the method are realized when processor is for executing the computer program stored in memory.
6th aspect, the embodiment of the present invention provide a kind of computer readable storage medium, the computer-readable storage medium
Matter is stored with computer instruction, when described instruction is run on computers so that computer executes such as first aspect and second
Method described in aspect.
In the embodiment of the present invention, after first terminal electrifying startup, it is connect with first terminal by optical fiber transmission acquisition
The synchronizing information that second terminal is sent carries out time synchronization, and the synchronizing information includes sending test for characterizing second terminal
First time at the time of signal, and then first terminal receives the test signal of second terminal transmission, and according at the first time
The transmission duration for determining test signal transmits the time difference between duration and Preset Transfer duration by calculating, you can according to
The signal that time difference sends second terminal carries out delay compensation, that is to say, that receiving device passes through after powering on and synchronizing
Calculate the difference between the transmission duration and preset duration of test information, you can determine the transmission signal paths traversed of equipment
Existing delay inequality carries out the time delay for contributing to reduce the signal transmission of communication equipment to follow-up signal and then delay compensation
Property, improve the real-time of signal transmission.
Meanwhile a time delay is carried out after the power is turned in receiving device by testing information due to only needing in the embodiment of the present invention
Test, you can the delay inequality of acquisition is applied to always subsequent delay compensation, test signal is sent without repeating, occupies resource
It is few, and realization method is relatively simple.
Description of the drawings
Fig. 1 is the flow chart one of delay compensation method in the embodiment of the present invention；
Fig. 2 is the flow chart for using delay compensation method in the embodiment of the present invention in the terminal of separate type；
Fig. 3 is the flowchart 2 of delay compensation method in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram one of terminal in the embodiment of the present invention；
Fig. 5 is the structural schematic diagram two of terminal in the embodiment of the present invention；
Fig. 6 is the module diagram of the time delay stabilization system where terminal in the embodiment of the present invention；
Fig. 7 is the structure chart of Computer device of the embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Delay compensation method in the embodiment of the present invention can be applied in the terminal for carrying out fiber optic communication, be used between terminal
Fiber alignment, thus also can by by it is such include that the network system of at least two independent terminals is known as the time delay of separation equipment
Stabilization system, the system platform may be used fpga chip and do Digital Signal Processing work, pass through light between the terminal in system
Fibre is attached and communicates.
In practical applications, it in terminal may include corresponding receiver and/or transmitter, therefore, terminal can be used as
Transmitting terminal also can be used as receiving terminal.
Embodiment preferable in the embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Embodiment one
Fig. 1 is delay compensation method provided in an embodiment of the present invention, and this method can be applied to above-mentioned time delay stabilization system
In terminal, such as first terminal has optical fiber connection, the party between one or more of the first terminal and system terminal
The main process of method can be described as follows：
S11：After first terminal electrifying startup, obtain same with the second terminal transmission of first terminal progress fiber optic communication
Information is walked, and time synchronization is carried out according to synchronizing information and second terminal, synchronizing information includes for characterizing second terminal hair
Send the first time of test signal.
In the embodiment of the present invention, first terminal is after electrifying startup, you can acquisition second terminal is transmitted same by optical fiber
Information is walked, and time synchronization is carried out by synchronizing information and second terminal, completes the system time synchronization in two terminals.
Wherein, test signal can be that the amplitude that second terminal is sent is more than the high pulse signal of default amplitude.When first
Between the delivery time of test signal that is characterized when be the uplink moment normal signal of second terminal being empty, i.e. first terminal and the
Between two terminals at the time of transmission demand without normal signal.In practical applications, first terminal is according to synchronizing information and the
After two terminals synchronize, you can at the time of determining that test signal is sent.
S12：After synchronous with the second terminal, the test signal of second terminal transmission is received, according at the first time
And the time of reception test signal determines the transmission duration of test signal.
In the embodiment of the present invention, first terminal is that can determine the delivery time of test signal according to synchronizing information, is being received
To after test signal, the transmission duration of test signal, example can be determined according to the delivery time of test signal and the time of reception
Such as calculate the time difference between finish time and the time of reception.
In practical applications, first terminal can also determine after carrying out time synchronization before S12 according to synchronizing information
The downlink free time section in signals transmission is carried out with second terminal, and in downlink free time section, is detected whether
There are high pulse signals, i.e. test signal.If it is determined that there are high pulse signals in section during idle time, then can be connect in S12
Receive high pulse signal.
Optionally, if first terminal includes counter, after receiving synchronizing information, first terminal can be believed according to synchronous
Breath is zeroed out counter, and the delivery time of test signal is determined according to first time, and then can control counter from hair
It send and starts counting up constantly, when first terminal determination receives high pulse signal, control counter stops timing, and latches final
Numerical value, the then numerical value recorded are the transmission duration that high pulse signal is transferred to first terminal by second terminal.
Therefore, in the embodiment of the present invention, between terminal after carrying out time synchronization, identification can be sent by carving during idle time
Higher high pulse signal is spent, the transmission duration of the transmission path of normal signal between detection terminal is carried out, and is mainly embodied as core
Piece controls, and does not need extra external analog circuitry and goes to control, and saves cost.Meanwhile for different terminals, meeting is docked every time
Play the effect of real-time testing, and easy to operate, can hardware and software platform transplantability it is strong.
S13：The time difference between transmission duration and Preset Transfer duration is calculated, second terminal is sent out according to time difference
The signal sent carries out delay compensation.
Wherein, Preset Transfer duration can be the pre- multiple test for first passing through the transmission duration to signal in a transmission path
The delay variation value of a set permission.The value range of the value can be according to the maximum biography in multiple test result
What defeated duration determined, such as a length of 120us when maximum transmitted, the then range residing for Preset Transfer duration being arranged can be
[125us, 130us].
In the embodiment of the present invention, first terminal is after determining the transmission duration of high pulse signal, you can calculates it and presets
The time difference between duration is transmitted, which can be used as delay compensation value, and then first terminal can be according to the time delay
Offset carries out delay compensation to the signal that second terminal is sent.If for example, receiving device calculate time difference be 8us,
Then can according to the 8us to receipt of subsequent, by sending ending equipment send normal signal carry out time delay processing.
Therefore, in the embodiment of the present invention, the terminal of separation can be determined by a time delay detection upon power-up of the system
Between delay compensation value, and by the delay compensation value for it is subsequent transmission signal time delay processing, ensure system transmission letter
Number when performance, help to improve the stability in system transmission signal process.
In an alternative embodiment of the invention, while S11 or later, first terminal can also be determined according to synchronizing information
From the uplink free time section in signals transmission, uplink free time section is that first terminal transmits at the uplink moment
At the time of normal signal is empty.
First terminal can select some in uplink free time section after the uplink free time section for determining itself
Moment is transmitted to miscellaneous equipment, such as third terminal by optical fiber and sends high pulse signal, whole with third to detect first terminal
Delay compensation value between end, to which the transmission signal between first terminal and third terminal carries out delay compensation.
In turn, first terminal can according to uplink free time section in select transmission high pulse signal at the time of and itself
System time generate synchronizing information, then the synchronizing information may include for show itself to third terminal send test signal
The second time parameter at the time of (high pulse signal), in uplink free time section at the time of indicated by second time parameter
It is interior.And then synchronizing information is sent to third terminal by first terminal, to carry out time synchronization with third terminal.
Certainly, in practical applications, first terminal, can also be directly in certain spy after completion is synchronous with second terminal
Timing carves (delivery time) and sends high pulse signal to second terminal, with to first terminal to the signal transmission between second terminal
The transmission duration in path is tested, and second terminal is according to synchronizing the delivery time that can determine high pulse signal, Jin Ergen
According to the time of reception of high pulse signal, you can when determining that corresponding delay compensation value carries out the signal subsequently from first terminal
Prolong compensation.
Therefore, in the embodiment of the present invention, on the one hand, first terminal can be used as receiving device, receive from second eventually
The synchronizing information at end carries out time synchronization, and then according to the pulse signal of reception and the test signal determined according to synchronizing information
Delivery time, calculate the time delay difference of itself signal transmission between second terminal, and to time delay in subsequent signal chassis
Compensation.
On the other hand, first terminal can also be used as sending ending equipment, i.e., according to the uplink free time of itself section and certainly
Body time system generates and sends synchronizing information to the miscellaneous equipment of connection, such as third terminal, and itself will send pulse letter
Number at the time of inform opposite equip., at the time of so as to opposite equip. according to return pulse signal, and the pulse signal be apprised of
Delivery time, to calculate transmission duration of the pulse signal between first terminal and third terminal, and then inspection can also be calculated
The transmission duration of survey and preset delay variation value calculation delay difference, and subsequent transmission signal is carried out according to time delay difference
Delay compensation.
Convenient for being better understood upon the implementation process of the method in the embodiment of the present application, below will by specific example and
Attached drawing is described in detail.
Fig. 2 is the flow diagram for implementing delay compensation method in terminal in time delay stabilization system.The time delay stabilization
System includes the terminal that two or more are connected by optical fiber, and each terminal may include radio frequency remoto module (Radio
Remote Unit, RRU) equipment and/or BBU baseband processing units (Building Base band Unit, BBU).This hair
Include RRU with terminal 2 (sending ending equipment), terminal 2 (receiving device) is comprising for BBU in bright embodiment.Subsequently in order to say
Bright book it is succinct, by terminal 1 be known as BBU, terminal 2 be known as RRU.Corresponding step in Fig. 2 is illustrated below：
Step 301：Each function module of terminal electrifying startup in system, sending ending equipment BBU and receiving device RRU
Into normal operating condition；
Step 302：After two terminals start, time synchronization is carried out using optical fiber transmission synchronizing information；
Step 303：Judge whether two terminals synchronize success；Wherein, however, it is determined that time synchronization success, then system can enter
Delay variation measuring phases；
Step 304：At the time of the uplink signal of RRU is empty, particular moment is selected, such as after synchronizing information
10us times, the signal initiating terminal of RRU send a high pulse signal of one clk of bit wide, the pulse width of the high pulse signal
Degree is higher by more than the amplitude of the normal signal between terminal.
Pulse signal passes through opto-electronic conversion by signal processing paths all RRU, BBU is passed to, using BBU
Opto-electronic conversion, be passed to BBU inside.In turn, the processing by the corresponding function module inside BBU to signal reaches at BBU signals
Manage the signal receiving module of end；
Step 305：The particular moment that BBU is selected according to RRU in step 304 proceeds by clear when pulse signal is sent
Zero count stops counting, and latch counting when being finally stopped to after detecting that pulse receives；
Step 306：The signal receiving module of BBU in range, initially enters step 307 at the appointed time, is receiving
Signal in, detect the high pulse signal that RRU is sent.The time range can be the institute of test repeatedly by carrying out in advance
Determining, such as it can be downlink free time section, then it is big to detect whether that there are amplitudes in downlink free time section by BBU
In the pulse signal of default amplitude；
Step 308：When BBU detects pulse signal, you can carry out signal latch, and stop counting, latch lower count
Last numerical value；
Step 309：BBU carries out phase by the numerical value according to shake maximum value setting, with the numerical value recorded in step 308
Subtract, the delay variation number this time connected；
Step 310：Calculated delay variation numerical value is increased to delay compensation module by BBU, with what is transmitted to follow-up RRU
Signal carries out delay process.
Therefore, the delay compensation method in the embodiment of the present invention, use are being combined between two or more separation equipment
When so that upper electrical transmission or distinct device assembling every time, time delay error all can precisely within the range of permission, to ensure
Signal-stabilized transmission and superposition use.
Embodiment two
Fig. 3 is the delay compensation method that provides in the embodiment of the present invention, and this method can be used for such as the in embodiment one
Two terminals, are connected between second terminal and first terminal by optical fiber.This method can be described as follows：
S101：Second terminal determines uplink free time section.
In the embodiment of the present invention, the uplink free time section of second terminal can be whole relative to first in finger second terminal
The uplink moment normal signal at end is the period of sky.
S102：Second terminal generates synchronizing information according to uplink free time section and system time, and synchronizing information includes
For the first time to first terminal transmission test signal, uplink free time section is at the time of indicated by first time
Interior, being established between second terminal and first terminal has optical fiber connection.
Wherein, test signal is the high pulse signal that amplitude is more than default amplitude, to be different from normal signal.Actually answering
In, second terminal can select to send high arteries and veins to first terminal within the period after determining uplink free time section
A specific time for rushing signal is referred to as at the first time herein.So, in second terminal when according to the uplink free time
Between section and system time when generating the synchronizing information synchronized with first terminal, can be indicated in synchronizing information this first when
Between.
S103：Synchronizing information is transferred to first terminal by second terminal by optical fiber, when so that first terminal is according to first
Between and receive test signal time come determine for dock collect mail number progress delay compensation a time delay difference.
Synchronizing information is sent to first terminal by second terminal by optical fiber, to pass through synchronizing information realization and first terminal
Time synchronization.After completing to synchronize, when second terminal determines that current time reaches first time, you can by optical fiber to the
One terminal sends high pulse signal, is tested with the transmission path between first terminal and second terminal, when to carry out
Prolong compensation, so that first terminal is according to the first time in synchronizing information, and receive high pulse signal at the time of passes to determine
Defeated duration, so that first terminal determines delay compensation value according to transmission duration, to be carried out to the information from second terminal
Delay compensation.Wherein, first terminal determines that the process of duration offset refers to the associated description of embodiment one, no longer superfluous herein
It states.
In the embodiment of the present invention, second terminal after the power-up, by determining the uplink free time of itself, and then according to upper
Row free time and system time generate the synchronous letter for the specific time for sending high pulse signal to first terminal comprising instruction
Breath can be according to quilt convenient for first terminal to during being synchronized with first terminal, inform the first terminal moment
The particular moment informed carries out timing, and when receiving high pulse signal, and transmission duration can be calculated according to the time of record,
The test for realizing the transmission duration of the transmission path to signal from second terminal to first terminal, to according to Preset Transfer duration
Calculation delay offset.
In practical applications, second terminal and first terminal be both powered up and complete it is synchronous after, second terminal may also can
The high pulse signal from first terminal is received, and records the time of reception of high pulse signal, and then second terminal can basis
It can be in second terminal and first that first terminal, which sends the delivery time of high pulse signal and the time of reception, the delivery time,
After terminal synchronously completes, the first terminal learnt sends the particular moment of high pulse signal, in turn, second terminal can calculate from
Signal from first terminal be transferred to second terminal between transmission path needed for transmission duration, and according to the transmission duration calculation
Corresponding delay compensation value, to carry out delay compensation to the signal from first terminal.Second terminal determines delay compensation value
Process determines that the process of delay compensation value is identical with first terminal, and details are not described herein again.
Therefore, in the embodiment of the present invention, second terminal can also be according to the high pulse signal from first terminal, realization pair
The test of the transmission duration of transmission path of the signal from first terminal to second terminal, and corresponding delay compensation value is calculated to coming
Delay compensation is carried out from the signal of first terminal, reduces the time delay of uplink and downlink signals, improves the real-time of system transmission signal.
Embodiment three
Based on same inventive concept, the embodiment of the present invention provides a kind of terminal, which can be aforementioned time delay stabilization system
Included first terminal in system is connected between each terminal by optical fiber in system.As shown in figure 4, the terminal include the time it is same
Walk module 21, receiving module 22 and delay compensation module 23.
In practical applications, which can also include time-delay calculation module 24, be shown together in Fig. 4.
Time synchronization module 21 can be used for after first terminal electrifying startup, obtains and carries out optical fiber with the first terminal
The synchronizing information that the second terminal of communication is sent, and time synchronization, institute are carried out according to the synchronizing information and the second terminal
It includes that the first time of test signal is sent for characterizing the second terminal to state synchronizing information.
Receiving module 22 can receive the test letter that the second terminal is sent after synchronous with the second terminal
Number, the transmission duration of the test signal is determined according to the first time and the time for receiving the test signal.
Delay compensation module 23 can be used for calculating the time difference between the transmission duration and Preset Transfer duration, press
Delay compensation is carried out to the signal that the second terminal is sent according to the time difference.
Optionally, the terminal can also include time-delay calculation module 24, described in being determined according to the first time
The delivery time of test signal, the timing since the delivery time when receiving the test signal, obtain and stop timing；
At this point, then the receiving module 22 can be used for determining the corresponding transmission of the test signal according to the duration of record
Duration.
Optionally, in the embodiment of the present invention, test signal is the high pulse signal that amplitude is more than default amplitude
Optionally, the receiving module 22 can be also used for：Before receiving the test signal that the second terminal is sent,
According to the downlink free time section carried out between synchronizing information determination and the second terminal in signals transmission, and
In the downlink free time section, detect whether that there are the high pulse signals；
It determines in free time section there are when the high pulse signal, receiving the high pulse signal, and will connect
The high pulse signal of receipts is as the test signal.
Example IV
Based on same inventive concept, the embodiment of the present invention provides a kind of terminal, which can be aforementioned time delay stabilization system
Included second terminal in system is connected between each terminal by optical fiber in system.As shown in figure 5, the terminal includes determining mould
Block 31, time synchronization module 32 and sending module 33.
Determining module 31 is determined for the uplink free time section of second terminal.
Time synchronization module 32 can be used for generating synchronizing information, institute according to uplink free time section and system time
It includes sending the first time of test signal to first terminal for second terminal to state synchronizing information, indicated by the time
Moment is in uplink free time section, and being established between the second terminal and the first terminal has optical fiber connection,
In, test signal is the high pulse signal that amplitude is more than default amplitude.
Sending module 33 can be used for the synchronizing information being transferred to the first terminal by optical fiber, so that described first
Terminal is used to dock a number progress delay compensation of collecting mail according to the first time and the time of the reception test signal to determine
Time delay difference.
In the embodiment of the present invention, the sending module 33 is specifically used for：
Determine that current time reaches the first time；
By optical fiber the test signal is sent to the first terminal.
In actual fiber communication process, between separate type terminal when carrying out fiber optic communication, if a terminal is to send
End, another terminal of docking can be receiving terminal.
In the following, using second terminal as transmitting terminal, first terminal is the time delay stabilization system introduced for receiving terminal where terminal
The framework of system.As shown in fig. 6, being the structure chart of the time delay stabilization system embodiment of separation equipment in the embodiment of the present invention, this is
It unites and is sequentially connected time synchronization module 32, (pulse) sending module 33 of second terminal, the time synchronization module 21 of first terminal,
Time-delay calculation module 24, (pulse) receiving module 22 and delay compensation module 23.Certainly, in practical applications, one can make
Can may include again repertoire module shown in Fig. 6 as the terminal of transmitting terminal for receiving terminal.
Specifically, contain time synchronization in sending ending equipment (such as RRU device) and receiving device (such as BBU equipment)
Module 21, is transmitted using optical fiber so that two terminals reach time synchronization.
The signal that sending module 33 can be arranged at the ends RRU sends position, when RRU uplink moment normal signals are empty,
Such as the particular moment after selected synchronizing information triggering, a certain moment in [10us, 15us] after being triggered such as synchronizing information, hair
Send a high pulse signal.
In turn, time-delay calculation module 24 can be zeroed out and start counting up work according to synchronizing information in BBU equipment.
The signal that (pulse) receiving module 22 can be located in BBU receives end, and shake can be limited according to the time
Range detects the high pulse signal that RRU is sended over, and latch this signal, and make time delay meter in the inscribed collection of letters number of range
It calculates module 24 to stop counting, latches final numerical value.
In turn, delay compensation module 23 can set the empirical value of a shake maximum magnitude, by this empirical value and time delay
The numerical value that computing module 24 finally locks compares, and calculates delay variation value, and calculated delay variation value is done signal
Delay compensation, to ensure every task, the treated time consistency of signal.
Embodiment five
A kind of computer installation is also provided in the embodiment of the present invention, structure is as shown in fig. 7, the computer installation includes place
Manage device 41 and memory 42, wherein the present invention is realized when processor 41 is for executing the computer program stored in memory 42
The step of delay compensation method provided in embodiment one.
Optionally, processor 41 can be specifically central processing unit, application-specific integrated circuit (Application
Specific Integrated Circuit, ASIC), can be one or more integrated circuits for controlling program execution,
Can be the hardware circuit of use site programmable gate array (Field Programmable Gate Array, FPGA) exploitation,
It can be baseband processor.
Optionally, processor 41 may include at least one process cores.
Optionally, electronic equipment further includes memory 42, and memory 42 may include read-only memory (Read Only
Memory, ROM), random access memory (Random Access Memory, RAM) and magnetic disk storage.Memory 42 is used for
Store data required when processor 41 is run.The quantity of memory 42 is one or more.
Embodiment six
A kind of computer readable storage medium is also provided in the embodiment of the present invention, which has
The delay compensation provided such as the embodiment of the present invention one may be implemented when computer instruction is run on computers for computer instruction
The step of method.
In embodiments of the present invention, it should be understood that a kind of disclosed delay compensation method and terminal, it can be by other
Mode realize.For example, apparatus embodiments described above are merely indicative, for example, the division of unit, only one
Kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
It is desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed it is mutual it
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, equipment or unit
It connects, can be electrical or other forms.
Each functional unit in embodiments of the present invention can be integrated in a processing unit or each unit also may be used
To be independent physical module.
It, can if integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product
To be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the embodiment of the present invention is complete
Portion or part can be expressed in the form of software products, which is stored in a storage medium, packet
It includes some instructions to use so that a computer equipment, such as can be personal computer, server or the network equipment etc.,
Or processor (Processor) executes all or part of step of the method for each embodiment of the present invention.And storage above-mentioned is situated between
Matter includes：It is general serial bus USB (Universal Serial Bus flash drive, USB), mobile hard disk, read-only
Memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or
The various media that can store program code such as person's CD.
Above example is only used for that technical scheme of the present invention is described in detail, but the explanation of above example is only
It is to be used to help understand the method for the embodiment of the present invention, should not be construed as the limitation to the embodiment of the present invention.The art
The change or replacement that technical staff can readily occur in should all be covered within the protection domain of the embodiment of the present invention.
Claims (16)
1. a kind of delay compensation method is applied to first terminal, which is characterized in that including：
After the first terminal electrifying startup, obtain same with the second terminal transmission of first terminal progress fiber optic communication
Information is walked, and time synchronization is carried out according to the synchronizing information and the second terminal, the synchronizing information includes being used for table
Levy the first time that the second terminal sends test signal；
After synchronous with the second terminal, the test signal that the second terminal is sent is received, when according to described first
Between and receive time of the test signal and determine the transmission duration of the test signal；
The time difference between the transmission duration and Preset Transfer duration is calculated, it is whole to described second according to the time difference
The signal that end is sent carries out delay compensation.
2. the method as described in claim 1, which is characterized in that described to determine the test signal according to the first time
Duration is transmitted, including：
The delivery time that the test signal is determined according to the first time, the timing since the delivery time；
When receiving the test signal, obtains and stop timing；
The corresponding transmission duration of the test signal is determined according to the duration of record.
3. method as claimed in claim 1 or 2, which is characterized in that the test signal is the height that amplitude is more than default amplitude
Pulse signal.
4. method as claimed in claim 3, which is characterized in that before receiving the test signal that the second terminal is sent,
The method further includes：
According to the downlink free time section between synchronizing information determination and the second terminal；
In downlink free time section, detect whether that there are the high pulse signals；
The test signal for receiving the second terminal and sending, including：
It determines in free time section there are when the high pulse signal, receiving the high pulse signal, and by reception
High pulse signal is as the test signal.
5. a kind of delay compensation method is applied to second terminal, which is characterized in that including：
Determine uplink free time section；
Synchronizing information is generated according to uplink free time section and system time, the synchronizing information includes for first
Terminal sends the first time of test signal, at the time of indicated by the first time in uplink free time section,
Being established between the second terminal and the first terminal has optical fiber connection；
The synchronizing information is transferred to the first terminal by optical fiber, so that the first terminal is according to the first time
And the time of the test signal is received to determine for docking number time delay difference for carrying out delay compensation of collecting mail.
6. method as claimed in claim 5, which is characterized in that the synchronizing information is being transferred to described first by optical fiber
After terminal, the method further includes：
Determine that current time reaches the first time；
By optical fiber the test signal is sent to the first terminal.
7. such as method described in claim 5 or 6, which is characterized in that the test signal is the height that amplitude is more than default amplitude
Pulse signal.
8. a kind of terminal, which is characterized in that including：
Time synchronization module is obtained and carries out the of fiber optic communication with the first terminal for after first terminal electrifying startup
The synchronizing information that two terminals are sent, and time synchronization, the synchronous letter are carried out according to the synchronizing information and the second terminal
Breath includes the first time that test signal is sent for characterizing the second terminal；
Receiving module, the test signal sent for after synchronous with the second terminal, receiving the second terminal, root
The transmission duration of the test signal is determined according to the first time and the time for receiving the test signal；
Delay compensation module, for calculate it is described transmission duration and Preset Transfer duration between time difference, according to it is described when
Between difference signal that the second terminal is sent carry out delay compensation.
9. terminal as claimed in claim 8, which is characterized in that the terminal further includes：
Time-delay calculation module, the delivery time for determining the test signal according to the first time, from when the transmission
It carves and starts timing, when receiving the test signal, obtain and stop timing；
The receiving module is used to determine the corresponding transmission duration of the test signal according to the duration of record.
10. method as claimed in claim 8 or 9, which is characterized in that the test signal is the height that amplitude is more than default amplitude
Pulse signal.
11. terminal as claimed in claim 10, which is characterized in that the receiving module is additionally operable to：
Before receiving the test signal that the second terminal is sent, according to the synchronizing information determine with the second terminal it
Between downlink free time section, and the downlink free time section in, detect whether that there are the high pulse signals；
It determines in free time section there are when the high pulse signal, receiving the high pulse signal, and by reception
High pulse signal is as the test signal.
12. a kind of terminal, which is characterized in that including：
Determining module, the uplink free time section for determining second terminal；
Time synchronization module, for generating synchronizing information, the synchronous letter according to uplink free time section and system time
Breath includes the first time for sending test signal to first terminal for second terminal, is at the time of indicated by the time
In the uplink free time section, being established between the second terminal and the first terminal has optical fiber connection；
Sending module, for the synchronizing information to be transferred to the first terminal by optical fiber, so that the first terminal root
It is determined according to the first time and the time of the reception test signal for docking number time delay for carrying out delay compensation of collecting mail
Difference.
13. terminal as claimed in claim 12, which is characterized in that the sending module is specifically used for：
Determine that current time reaches the first time；
By optical fiber the test signal is sent to the first terminal.
14. terminal as described in claim 12 or 13, which is characterized in that the test signal is that amplitude is more than default amplitude
High pulse signal.
15. a kind of computer installation, which is characterized in that the computer installation includes processor, and the processor is for executing
It is realized when the computer program stored in memory such as any claim the method in claim 1-7.
16. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, when described instruction is run on computers so that computer executes the side as described in any claim in claim 1-7
Method.
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| CN201810350444.6A CN108809617B (en) | 2018-04-18 | 2018-04-18 | Time delay compensation method and terminal |
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|---|---|---|---|
| CN201810350444.6A CN108809617B (en) | 2018-04-18 | 2018-04-18 | Time delay compensation method and terminal |
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| CN108809617B CN108809617B (en) | 2021-12-14 |
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| CN113960413A (en) * | 2021-10-20 | 2022-01-21 | 石家庄科林电气股份有限公司 | Time synchronization method for collecting unit and collecting unit in fault indicator |
| CN114301565A (en) * | 2021-12-30 | 2022-04-08 | 上海布鲁可积木科技有限公司 | Method and system for wireless communication between toy modules |
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