CN108337180A - A method of realizing that UDP steady rates fill packet - Google Patents
A method of realizing that UDP steady rates fill packet Download PDFInfo
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- CN108337180A CN108337180A CN201710043151.9A CN201710043151A CN108337180A CN 108337180 A CN108337180 A CN 108337180A CN 201710043151 A CN201710043151 A CN 201710043151A CN 108337180 A CN108337180 A CN 108337180A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/19—Flow control; Congestion control at layers above the network layer
- H04L47/196—Integration of transport layer protocols, e.g. TCP and UDP
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/35—Flow control; Congestion control by embedding flow control information in regular packets, e.g. piggybacking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
This application discloses a kind of methods that UDP steady rates fill packet, and packet rate is steadily filled in terms of two by using nanosecond other time.On the one hand, the stand-by period it is expected in setting, when starting waiting for, records nanosecond other time started, and obtain the other current time of nanosecond, when the stand-by period is more than the desired stand-by period, terminates to wait for, solves the problems, such as that stand-by period error is big；On the other hand, by calculating the other interval of giving out a contract for a project of nanosecond, nanosecond is other gives out a contract for a project the time started for record, and to counting how many times of giving out a contract for a project, nanosecond other end time, and the time waited for according to interval of giving out a contract for a project, time started, give out a contract for a project number and end time calculating needs are recorded at the end of giving out a contract for a project, and it is expected the stand-by period for being arranged, to during giving out a contract for a project before correcting for because time migration caused by stand-by period error or other factors, the error generated in the process that will give out a contract for a project solve in time.Therefore, it can obtain smoothly filling packet rate using the application.
Description
Technical field
This application involves field of communication technology, more particularly to a kind of method realized UDP steady rates and fill packet.
Background technology
User Datagram Protocol (UDP), which fills packet rate, to be determined by the size of data sent in the unit interval, i.e.,：
V (filling packet rate)=dataSize (filling bag data size)/time (filling packet time span).
So, to realize that UDP steady rates fill packet, it is necessary to realize filling bag data constant magnitude per second.Wherein,
DataSize (filling bag data size)=packageSize (size each wrapped) * count (number of giving out a contract for a project), so in 1 second
Filling packet rate v=packageSize*count.Assuming that packageSize is constant, then we can calculate according to formula
Number count values per second of giving out a contract for a project calculate every then according to interval (time interval given out a contract for a project every time)=time/count
The secondary time interval given out a contract for a project.Start to fill packet at this time, data are sent, are then waited for, gives out a contract for a project next time the time when the time reaches, i.e.,
SendTime (transmission data takes)+waitTime (stand-by period)=interval, retransmits data, ceaselessly recycles, directly
It is wrapped to stopping filling.
But found in actual observation, it realizes that UDP fills packet using the program, is formed by and fills packet rate precision deficiency,
Error is big, and the rate value fluctuating change in UDP fills the UDP filling packet rate charts seen packet rate monitoring side is big, and rate is inadequate
Stablize.The problem of being embodied in following two aspects：
Technical problem 1,
Found in actual test, execute etc. until give out a contract for a project next time this during often offset, with setting
Stand-by period it is inconsistent, be susceptible to more than or less than the desired stand-by period, to cause the number sent in the unit interval
It is uncertain according to packet size, it is eventually exhibited as UDP and fills packet rate precision deficiency, error is big.Fill what packet rate monitoring side was seen in UDP
Filling packet rate will appear continuous fluctuation and fluctuation is very strong, and rate is not sufficiently stable.
Present inventor analyzes, and the possible cause there are the above problem is：The Thread.sleep methods used are not
It disclosure satisfy that the millisecond of the appearance in UDP filling packets is even less than the other time precision of Millisecond.Therefore, the present invention needs to improve
The precision of stand-by period.
Technical problem 2,
It is found during current scheme use, certain moment give out a contract for a project the consumed time can be every more than calculating
It is secondary to give out a contract for a project the maximum time that spent or the stand-by period is slightly more or less than the desired stand-by period, to cause list
The data package size sent in the time of position changes, and UDP is caused to fill being decreased or increased suddenly for packet rate, and Bao Su is filled in UDP
Rate monitoring side can be appreciated that filling packet rate either large or small fluctuation accidentally occurs.
Present inventor analyzes, and the possible cause there are the above problem is：There is the stand-by period at certain moment
After error, error is not corrected timely, leads to the accumulation of error.Therefore, present invention needs are constantly corrected in filling packet procedures
Due to stand-by period error caused by certain factors.
Invention content
This application provides a kind of methods realized UDP steady rates and fill packet, it is intended to obtain smoothly filling packet rate.
A kind of method realized User Datagram Protocol UDP steady rates and fill packet provided by the present application, including：
A, nanosecond other expectation stand-by period is obtained；
B, when starting waiting for, the other time started startTime of nanosecond is recorded；
C, the other current time currentTime of nanosecond is obtained, formula waitTime=currentTime- is passed through
StartTime calculates the stand-by period, when the stand-by period is more than the desired stand-by period, terminates to wait for.
Preferably, the C includes：
C1, stand-by period waitTime=0 is set；
C2, judge whether the stand-by period is more than the desired stand-by period, if the stand-by period is more than expectation waiting
Time terminates to wait for；If the stand-by period is less than or equal to the desired stand-by period, into C3；
C3, the other current time currentTime of nanosecond is obtained；
C4, waitTime=currentTime-startTime is calculated, and returns to C2.
Preferably, before the A, further comprise：
A, before starting to give out a contract for a project, the other interval interval that gives out a contract for a project of nanosecond is calculated；
B, the current number count that gives out a contract for a project of setting is 0；
C, the other time started startTime of nanosecond is obtained；
D, judge whether to terminate to fill packet, if the determination result is YES, then terminate to fill packet；If judging result is no, enter step
Rapid e；
E, count=count+1 is set；
F, transmission data packet；
G, at the end of giving out a contract for a project, the other end time endTime of nanosecond is obtained；
H, the time for needing to wait for is calculated according to (interval*count)-(endTime-startTime)；
The A includes：With the time that the needs being calculated wait for, the expectation stand-by period is set.
A kind of method realized UDP steady rates and fill packet provided by the present application, including：
A, before starting to give out a contract for a project, the other interval interval that gives out a contract for a project of nanosecond is calculated；
B, the current number count that gives out a contract for a project of setting is 0；
C, the other time started startTime of nanosecond is obtained；
D, judge whether to terminate to fill packet, if the determination result is YES, then terminate to fill packet；If judging result is no, enter step
Rapid e；
E, count=count+1 is set；
F, transmission data packet；
G, at the end of giving out a contract for a project, the other end time endTime of nanosecond is obtained；
H, the time for needing to wait for is calculated according to (interval*count)-(endTime-startTime)；
I, after waiting for the time for needing to wait for, into d.
Preferably, the i includes：
A, need the time waited for that nanosecond other expectation stand-by period is set according to described；
B, when starting waiting for, the other time started startTime of nanosecond is recorded；
C, the other current time currentTime of nanosecond is obtained, formula waitTime=currentTime- is passed through
StartTime calculates the stand-by period, when the stand-by period is more than the desired stand-by period, terminates to wait for, into d.
Preferably, the C includes：
C1, stand-by period waitTime=0 is set；
C2, judge whether the stand-by period is more than the desired stand-by period, if the stand-by period is more than expectation waiting
Time terminates to wait for；If the stand-by period is less than or equal to the desired stand-by period, into C3；
C3, the other current time currentTime of nanosecond is obtained；
C4, waitTime=currentTime-startTime is calculated, and returns to C2.
As seen from the above technical solution, it is other by using nanosecond to fill packet method for UDP steady rates provided by the present application
Time steadily fills packet rate in terms of two.On the one hand, the stand-by period it is expected in setting, when starting waiting for, records nanosecond rank
At the beginning of, and the other current time of nanosecond is obtained, when the stand-by period is more than the desired stand-by period, terminate etc.
It waits solving the problems, such as that stand-by period error is big, reduces UDP and fill packet rate trueness error；On the other hand, by calculating nanosecond
The interval of giving out a contract for a project of rank, nanosecond is other gives out a contract for a project the time started for record, and to counting how many times of giving out a contract for a project, records and receive at the end of giving out a contract for a project
The end time of second rank, and according to interval of giving out a contract for a project, the time started, give out a contract for a project number and the end time calculate need to wait for when
Between, it is expected the stand-by period for being arranged, to during giving out a contract for a project before correcting for because stand-by period error or other factors are made
At time migration, the error generated in the process that will give out a contract for a project solves in time, effectively reduces UDP and fills packet rate fluctuation.Therefore, it answers
The fluctuation that UDP fills packet procedures medium-rate can be greatly reduced with the application, improves the stability that UDP fills packet.
Description of the drawings
Fig. 1 is the schematic diagram that existing UDP fills packet scheme；
Fig. 2 is the schematic diagram that UDP of the present invention fills packet scheme；
Fig. 3 is the flow diagram that present invention high-precision waits for method；
Fig. 4 is the flow diagram for the method that the present invention corrects stand-by period error in real time；
Fig. 5 is performance monitoring handling capacity tendency chart in base station cell of the present invention；
Fig. 6 is performance monitoring handling capacity table in base station cell of the present invention.
Specific implementation mode
To make the object, technical solution and advantage of the application be more clearly understood, develop simultaneously embodiment referring to the drawings, right
The application is described in further detail.
The problem of in terms of for two present in the prior art, the present invention propose corresponding solution：
On the one hand, by the present invention in that with nanosecond other time, when starting waiting for, one nanosecond is other opens for record
Begin time startTime, the other current time currentTime of nanosecond is constantly obtained by a cycle, when obtaining current
Between after, the stand-by period is calculated by formula currentTime-startTime, is more than it is expected etc. when stand-by period
Cycle is jumped out when the time, terminates to wait for.Solve the problems, such as that prior art stand-by period error is big with this.
About the acquisition methods of nanosecond other time, method can be increased newly by JDK1.5 in Java
Java.lang.System.nanoTime is obtained, and what this method returned is the current value of most accurate available system timer, with
Nanosecond is unit, and the method is only used for measuring the time being already expired, with other of system or watch time any time concept
It is unrelated.The time is a relative time, can be used for calculating the time difference, but cannot be used for indicating some specific time point.
On the other hand, the present invention is spaced interval by first calculating other give out a contract for a project of nanosecond before starting to give out a contract for a project, if
It is 0 to set the current number count that gives out a contract for a project, and obtains the other time started startTime of a nanosecond, is sent out subsequently into cycle
Packet, first adds 1 before giving out a contract for a project every time by count values, the other end time endTime of a nanosecond is recorded after giving out a contract for a project, then lead to
It crosses formula waitTime=(count*interval)-(endTime-startTime) and calculates the time for needing to wait for, with this
Because of time migration caused by stand-by period error or other factors, to be generated during giving out a contract for a project during giving out a contract for a project before correcting
Error solve in time.
Fig. 1 and Fig. 2 is respectively that existing UDP fills the schematic diagram that packet scheme fills packet scheme with UDP of the present invention.
Existing UDP shown in Fig. 1 is filled in packet scheme, and Time1 is the error in period 1, but startTime weights in the period 2
New value does not exclude the error in waitTime=Interval-(endTime2-startTime1), waitTime,
Result in the accumulation of error；And UDP of the present invention shown in Fig. 2 is filled in packet scheme, Time1 is the error in period 1, due to the present invention
Only a startTime and waitTime=(count*interval)-(endTime2- have been taken before starting to fill packet
StartTime), therefore the waitTime=Time2 that calculates, the error generated to the period 1 are corrected.
The specific embodiment of the present invention is the terminal program developed based on Android.When program receives
After filling packet order, packet is filled to specified address constant speed rate, until receiving end order.
Fig. 3 is the flow diagram that present invention high-precision waits for method, is included the following steps：
Step 1 obtains the other expectation stand-by period hopeTime of nanosecond.
Step 2, when starting waiting for, record nanosecond other time started startTime.
Stand-by period waitTime=0 is arranged in step 3.
Step 4 judges whether the stand-by period is more than the desired stand-by period, if result is True, i.e.,：When having waited for
Between be more than it is expected the stand-by period, terminate waiting；If result is False, i.e., when the stand-by period is less than or equal to expectation waiting
Between, enter step 5.
Step 5 obtains the other current time currentTime of nanosecond.
Step 6 calculates stand-by period waitTime=currentTime-startTime, subsequently into step 4,
Continue to judge whether the stand-by period is more than the desired stand-by period.
Fig. 4 is the flow diagram for the method that the present invention corrects stand-by period error in real time, is included the following steps：
Step 1 calculates the other time interval interval that gives out a contract for a project of nanosecond.
Step 2, the current number count=0 that gives out a contract for a project of setting.
Step 3 obtains the other time started startTime of nanosecond.
Step 4 judges whether to terminate to fill packet, if result is True, terminates；If result is False, 5 are entered step.
Current number of giving out a contract for a project is added 1, count=count+1 by step 5.
Step 6, transmission data packet.
Step 7 obtains the other end time endTime of nanosecond after giving out a contract for a project.
Step 8 calculates the time for needing to wait for, and formula is (interval*count)-(endTime-startTime),
The step is to correct the committed step of error.
Step 9 after waiting for the time for needing to wait for, enters step 4, continues to determine whether to fill packet.
The method for the stand-by period error generated in the process of being given out a contract for a project using high-precision waiting method of the present invention and real-time correction,
The accuracy that UDP fills packet rate can be made to be greatly improved with stability.The estate performance prison of base station according to Fig.5,
Cell throughout table in cell throughout tendency chart in survey, with the estate performance monitoring of base station shown in Fig. 6, it can be seen that
Rate amplitude of variation is effectively reduced, and rate tends to be steady on the whole, has been reached UDP and has been determined the mesh that rate stabilization fills packet
's.
The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.
Claims (6)
1. a method of realizing that User Datagram Protocol UDP steady rates fill packet, which is characterized in that including：
A, nanosecond other expectation stand-by period is obtained；
B, when starting waiting for, the other time started startTime of nanosecond is recorded；
C, the other current time currentTime of nanosecond is obtained, formula waitTime=currentTime- is passed through
StartTime calculates the stand-by period, when the stand-by period is more than the desired stand-by period, terminates to wait for.
2. according to the method described in claim 1, it is characterized in that, the C includes：
C1, stand-by period waitTime=0 is set；
C2, judge it is expected whether the stand-by period is more than the stand-by period, if the stand-by period more than the desired stand-by period,
Terminate to wait for；If the stand-by period is less than or equal to the desired stand-by period, into C3；
C3, the other current time currentTime of nanosecond is obtained；
C4, waitTime=currentTime-startTime is calculated, and returns to C2.
3. method according to claim 1 or 2, which is characterized in that before the A, further comprise：
A, before starting to give out a contract for a project, the other interval interval that gives out a contract for a project of nanosecond is calculated；
B, the current number count that gives out a contract for a project of setting is 0；
C, the other time started startTime of nanosecond is obtained；
D, judge whether to terminate to fill packet, if the determination result is YES, then terminate to fill packet；If judging result is no, e is entered step；
E, count=count+1 is set；
F, transmission data packet；
G, at the end of giving out a contract for a project, the other end time endTime of nanosecond is obtained；
H, the time for needing to wait for is calculated according to (interval*count)-(endTime-startTime)；
The A includes：With the time that the needs being calculated wait for, the expectation stand-by period is set.
4. a kind of method realized UDP steady rates and fill packet, which is characterized in that including：
A, before starting to give out a contract for a project, the other interval interval that gives out a contract for a project of nanosecond is calculated；
B, the current number count that gives out a contract for a project of setting is 0；
C, the other time started startTime of nanosecond is obtained；
D, judge whether to terminate to fill packet, if the determination result is YES, then terminate to fill packet；If judging result is no, e is entered step；
E, count=count+1 is set；
F, transmission data packet；
G, at the end of giving out a contract for a project, the other end time endTime of nanosecond is obtained；
H, the time for needing to wait for is calculated according to (interval*count)-(endTime-startTime)；
I, after waiting for the time for needing to wait for, into d.
5. according to the method described in claim 4, it is characterized in that, the i includes：
A, need the time waited for that nanosecond other expectation stand-by period is set according to described；
B, when starting waiting for, the other time started startTime of nanosecond is recorded；
C, the other current time currentTime of nanosecond is obtained, formula waitTime=currentTime- is passed through
StartTime calculates the stand-by period, when the stand-by period is more than the desired stand-by period, terminates to wait for, into d.
6. according to the method described in claim 5, it is characterized in that, the C includes：
C1, stand-by period waitTime=0 is set；
C2, judge it is expected whether the stand-by period is more than the stand-by period, if the stand-by period more than the desired stand-by period,
Terminate to wait for；If the stand-by period is less than or equal to the desired stand-by period, into C3；
C3, the other current time currentTime of nanosecond is obtained；
C4, waitTime=currentTime-startTime is calculated, and returns to C2.
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Application publication date: 20180727 |