CN107231315A - A kind of jamming control method and system - Google Patents
A kind of jamming control method and system Download PDFInfo
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- CN107231315A CN107231315A CN201610173606.4A CN201610173606A CN107231315A CN 107231315 A CN107231315 A CN 107231315A CN 201610173606 A CN201610173606 A CN 201610173606A CN 107231315 A CN107231315 A CN 107231315A
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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
- H04L47/27—Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
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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
- H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
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Abstract
A kind of jamming control method and system, methods described include：Calculate first terminal and the throughput of service end；Periodically according to the throughput, the size of the corresponding congestion window of the first terminal is determined.The application can improve the real-time and bandwidth availability ratio of congestion control, reduce packet loss.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of jamming control method and system.
Background technology
TCP (Transmission Control Protocol, transmission control protocol) is widely used now.
TCP congestion control mechanism is a kind of passive jamming control method, and this method carries out the means of congestion control
It is the idea based on " detection ", according to the packet drop of current network, dynamically adjusts congestion window
Realize congestion control, such as cubic algorithms.
The defect of existing jamming control method is：Network quality change can not be rapidly adapted to；Work as network
During degradation, congestion window can't be adjusted in real time, and sender enters still according to original speed
Row is given out a contract for a project, and will so cause packet loss；On the other hand, TCP is used in packet loss and is subtracted congestion window size
Half mode carries out Congestion Avoidance, and the transmission rate of sender depends on the size of congestion window, therefore
Bandwidth availability ratio can be caused low.
In a mobile network, the network quality of terminal device is easier to change, if using above-mentioned quilt
Dynamic jamming control method, then packet loss and will more protrude the problem of low bandwidth availability ratio.
The content of the invention
The application proposes a kind of jamming control method and system, it is possible to increase the real-time and band of congestion control
Wide utilization rate, reduces packet loss.
The application is adopted the following technical scheme that.
A kind of jamming control method, including：
Calculate first terminal and the throughput of service end；
Periodically according to the throughput, the size of the corresponding congestion window of the first terminal is determined.
Alternatively, the periodicity determines the corresponding congestion window of the first terminal according to the throughput
The size of mouth includes：
The arithmetic of the throughput before periodically calculating current time in the first scheduled time length is put down
Mean B, the size W for determining congestion window is α × RTTmin×B；Wherein α is predetermined constant, RTTmin
For two-way time minimum in the first scheduled time length before current time.
Alternatively, first scheduled time length is less than or equal to 500 milliseconds, more than or equal to calculating
The time interval of the throughput；
1≤α≤100。
Alternatively, first scheduled time length is 100 milliseconds, and α is 2.
Alternatively, described method also includes：
When the data volume for having been issued to the first terminal but do not receive the first terminal confirmation is not up to
During W, the first terminal is sent the data to using B as transmission rate；When having been issued to described
One terminal but when not receiving data volume that the first terminal confirms more than W, suspends and sends data to institute
State first terminal.
A kind of congestion control system, including：
Computing module, for calculating the throughput between first terminal and base station；
Neural network forecast module, for periodicity according to the throughput, determines that the first terminal is corresponding
The size of congestion window.
Alternatively, the neural network forecast module determines the first terminal periodically according to the throughput
The size of corresponding congestion window includes：
Institute before the neural network forecast module periodically calculating current time in the first scheduled time length
The arithmetic average B of throughput is stated, the size W for determining congestion window is α × RTTmin×B；Wherein
α is predetermined constant, RTTminFor two-way time minimum in the first scheduled time length before current time.
Alternatively, first scheduled time length is less than or equal to 500 milliseconds, more than or equal to calculating
The time interval of the throughput；
1≤α≤100。
Alternatively, first scheduled time length is 100 milliseconds, and α is 2.
Alternatively, described system also includes：
Congestion processing module, for true when having been issued to the first terminal but not receiving the first terminal
When the data volume recognized is not up to W, the first terminal is sent the data to using B as transmission rate；
When having been issued to the first terminal but not receiving the data volume of the first terminal confirmation more than W,
Pause sends data to the first terminal.
The application includes advantages below：
At least one alternative of the application determines the size of congestion window by throughput, thus can and
The change of Shi get Zhi network qualities and the therewith size of adjustment congestion window, compared to occurring in the prior art
Packet loss just directly by the half-sized way of congestion window, can improve bandwidth availability ratio；When network matter
When quantitative change is poor, throughput will decline, because the size of congestion window is determined according to throughput, therefore
Transmission rate can also decline therewith, reduce packet loss；Further, since throughput can be based on and be not limited to thing
Reason layer parameter is obtained, therefore the program can be perfectly suitable for that the communication system of physical layer parameter can be gathered
System.
Another alternative of the application defines the calculating details that congestion window is determined using throughput.This
The parameter value used when defining calculating in a kind of embodiment of alternative, can be more rational
Determine congestion window.Defined in the another embodiment of this alternative when unacknowledged data volume does not reach
To congestion window size when, to predict bandwidth as transmission rate, equivalent to according to real-time throughput
Dynamically to adjust the speed for sending data；And when unacknowledged data volume exceedes the size of congestion window then
Pause is sent, and waits to be confirmed；The size of congestion window is not adjusted directly according to the confirmation situation of data
It is whole, but it is related to real-time throughput.
Another alternative of the application defines how the active and passive hybrid congestion control of progress, so that
The different phase in communication process can be better adapted to.
Certainly, implementing any product of the application must be not necessarily required to while reaching all the above excellent
Point.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the jamming control method of embodiment one；
Fig. 2 is the schematic diagram of the congestion control system of embodiment two；
Fig. 3 is the schematic diagram of the application scenarios of the example of embodiment two.
Embodiment
The technical scheme of the application is described in detail below in conjunction with drawings and Examples.
If it should be noted that not conflicting, each feature in the embodiment of the present application and embodiment can
To be combined with each other, within the protection domain of the application.Patrolled in addition, though showing in flow charts
Volume order, but in some cases, can be shown or described to be performed different from order herein
Step.
In a typical configuration, the computing device of client or Verification System may include one or more
Processor (CPU), input/output interface, network interface and internal memory (memory).
Internal memory potentially includes the volatile memory in computer-readable medium, random access memory
And/or the form, such as read-only storage (ROM) or flash memory (flash such as Nonvolatile memory (RAM)
RAM).Internal memory is the example of computer-readable medium.Internal memory potentially includes module 1, module 2 ... ...,
Module N (N is the integer more than 2).
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by
Any method or technique come realize information store.Information can be computer-readable instruction, data structure,
The module of program or other data.The example of the storage medium of computer includes, but are not limited to phase transition internal memory
(PRAM), static RAM (SRAM), dynamic random access memory (DRAM),
Other kinds of random access memory (RAM), read-only storage (ROM), electrically erasable
Read-only storage (EEPROM), fast flash memory bank or the read-only storage of other memory techniques, read-only optical disc
Device (CD-ROM), digital versatile disc (DVD) or other optical storages, magnetic cassette tape, magnetic
The storage of band magnetic rigid disk or other magnetic storage apparatus or any other non-transmission medium, can be with available for storage
The information being accessed by a computing device.Defined according to herein, computer-readable medium does not include non-temporary
The data-signal and carrier wave of computer readable media (transitory media), such as modulation.
Embodiment one, a kind of jamming control method, as shown in figure 1, including step S110~S120：
Throughput between S110, calculating first terminal and base station；
S120, periodically according to the throughput, determine the big of the corresponding congestion window of the first terminal
It is small.
In the present embodiment, in the step S110, it can be, but not limited to whole by gather in real time first
Physical layer parameter when being communicated between end and base station, calculates the throughput, is properly termed as physics
Layer throughput；The physical layer parameter can be, but not limited to obtain by physical layer control frame.The step
In S120, the unit of the congestion window can be, but not limited to be it is following any one：Packet number,
Message segment number, byte number, time span etc..
It is that the big of congestion window is adjusted according to packet loss and ACK (confirmation) message received in the prior art
It is small, it is adjusted equivalent to according to transmission result, therefore when network condition changes, congestion window
Adjustment there is certain delay；And the size of congestion window described in the present embodiment is true according to physical layer parameter
It is fixed, can the preferably current actual conditions of matching network, and go for that throughput can be calculated
Communication system, such as LTE (Long Term Evolution, Long Term Evolution) systems or
CDMA (Code Division Multiple Access, CDMA), WCDMA (Wideband Code
Division Multiple Access, WCDMA) etc. system；Relative to quilt of the prior art
Dynamic congestion control scheme, the present embodiment can realize active congestion control.
It is a kind of it is alternative calculate throughput way be：The physical layer parameter includes MCS
(Modulation and coding scheme, modulation and coding strategy), RB (Resource Block,
Resource block) and TBS (Transport Block Size, transport block size).When calculating throughput, root
Tabled look-up according to MCS and RB numbers and obtain TBS；It is determined that after the TBS of each subframe, according to frame proportioning and spy
The TBS+CRC (if dicode word will also be multiplied by 2) of different each cumulative subframe of subframe proportioning, so that
Calculate throughput.Other throughput computational methods can also be applicable.
In the present embodiment, " calculating " operation in the step S110 can receive physical layer control
Triggered during frame, such as receive every time and the physical layer parameter wherein carried and root are just gathered after physical layer control frame
A throughput is calculated according to the physical layer parameter gathered.Cycle length in the step S120 can be certainly
Row is set, such as could be arranged to physical layer parameter of every collection and determine that the big of congestion window
It is small.
In a kind of alternative of the present embodiment, the step S120 can include：
The arithmetic of the throughput before periodically calculating current time in the first scheduled time length is put down
Mean B, the size W for determining congestion window is α × RTTmin× B, wherein α are predetermined constant, RTTmin
For RTT (Round-trip Time, when coming and going minimum in the first scheduled time length before current time
Between).
In this alternative, the arithmetic mean number B can regard the prediction bandwidth at current time as, single
Position can be byte per second, or bps etc.；W unit can be correspondingly byte, also may be used
Think and compare top grade.Wherein, the Cycle Length for calculating B and determination W can be first scheduled time
Length, can also be more than or less than first scheduled time length.
In other alternatives, correspondence pass that can also be between the size of predetermined throughput and congestion window
System, the size of congestion window is determined according to throughput and the corresponding relation.In other alternatives, may be used also
To determine the size of congestion window using throughput that is the last or repeatedly calculating.Other alternatives
In, when using the throughput that repeatedly calculates recently or before current time in the first scheduled time length
Multiple throughputs when determining the size of congestion window, the arithmetic mean except these throughputs can be used
Value is calculated, the numerical value that minimum value or other calculations in these throughputs can also be used to obtain
Determine the size of congestion window.
In a kind of embodiment of this alternative, first scheduled time length T is less than or equal to
500ms, more than or equal to the time interval for calculating the throughput；Preferably, T can be, but not limited to
For 100ms (millisecond), the smaller then frequency acquisitions of T are higher, and measurement result is more accurate, but can more consume
Electricity.1≤α≤100, it is preferable that α can be, but not limited to for 2, when transmission delay is relatively low to add
Big α.
In present embodiment, T minimum value reports physical layer parameter equivalent to depending on first terminal bottom
Frequency, after the underlying protocol stack entities of first terminal receive physical layer control frame, can parse wherein
Physical layer parameter and report；In real-time calculate, one is carried out if often reporting a physical layer parameter
The calculating of secondary throughput, then T minimum value be at least time point of twice adjacent calculation throughput and be spaced
Time span.
In a kind of embodiment of this alternative, methods described can also include：
S130, when having been issued to the first terminal but do not receive data volume that the first terminal confirms not
When reaching W, the first terminal is sent the data to using B as transmission rate；When having been issued to
When stating first terminal but not receiving the data volume of the first terminal confirmation more than W, pause sends data
To the first terminal.
In present embodiment, step S130 and step S110, S120 can be parallel；When the first end
End can start step S130 after determining the size of congestion window after starting for the first time.Upon actuation first
Before the secondary size for determining congestion window, it would however also be possible to employ last during the startup of predetermined or first terminal last time
The throughput once calculated determines the size of congestion window, to carry out step S130；It can also use
The size of the congestion window finally used during the startup of predetermined or first terminal last time carries out step S130.
In present embodiment, confirmation is not received and can be, but not limited to refer to not receive ACK message.
It could be arranged to only in the case of occurring packet loss, just be gathered around using the scheme of present embodiment
Plug control；It can also be provided that predetermined case uses or all uses the side of present embodiment in any case
Case.
In present embodiment, the data volume for having sent but not received confirmation is exactly equal to W what state
Processing can voluntarily be set, such as could be arranged to and carry out same processing during not up to W, i.e., with
B carries out data transmission as transmission rate, it can also be provided that and carry out same processing during more than W,
I.e. pause sends data；" holding present situation " is may be arranged as, such as when having sent but do not received confirmation
Data volume when being exactly equal to W, can if carrying out data transmission using B as transmission rate
To continue to send, if suspending transmission, continue to suspend.
In present embodiment, pause is sent after data, it will continue to receive for the data that send before
Confirm, therefore sent but do not received the data volume of confirmation and will reduce, after W is reduced to less than,
It will continue to carry out data transmission using B as transmission rate.During this period, W is only with gulping down for calculating
Tell rate to change and change, just will not immediately halve in packet loss.
In other embodiment, it would however also be possible to employ other manner come utilize congestion window carry out congestion control；
Such as when having sent but do not receive the data volume of confirmation and be not up to W, to set speed or according to gathering around
Fill in the speed progress data transmission that the size of window is determined；For another example when the number for having sent but not received confirmation
During according to amount more than W, W is reduced according to setting step-length.
In a kind of alternative of the present embodiment, it can also include before the step S110：
When the first terminal starts not up to the second scheduled time length, using TCP slow turn-on modes
Carry out congestion control.
In this alternative, the situation for carrying out congestion control using TCP slow turn-ons mode can include institute
When stating first terminal to base station transmission upstream data, congestion control is carried out to the first terminal, can also
During including base station to first terminal transmission downlink data, congestion control is carried out to the base station.
In this alternative, during due to just starting, there is no communication flows, B and RTT on networkminCan not
Survey calculation, therefore using the algorithm of TCP slow turn-ons.
In this alternative, second scheduled time length can be more than or equal to the described first pre- timing
Between length.
In other alternatives, it can be used when first terminal starts and is not up to the second scheduled time length
Other algorithms carry out congestion control, the congestion finally determined when can also be started using the first terminal last time
Window carries out congestion control, can also carry out congestion control first with default congestion window.
It in a kind of embodiment of this alternative, may be arranged as when not occurring packet loss, use
TCP cubic algorithms carry out congestion control；Just carried out during generation packet loss using above-mentioned steps S110~S130
Congestion control；The advantage of active and passive congestion control can so be combined.In other embodiments, may be used
In addition to during being not up to the second scheduled time length except starting, all using above-mentioned steps S110~S130
Carry out congestion control.
Embodiment two, a kind of congestion control system, as shown in Fig. 2 including：
Computing module 21, for calculating the throughput between first terminal and base station；
Neural network forecast module 22, for periodicity according to the throughput, determines the first terminal pair
The size for the congestion window answered.
In the present embodiment, the computing module 21 is the responsible part for calculating throughput in the system,
It can be the combination of software, hardware or both.
In the present embodiment, the neural network forecast module 22 is responsible determination congestion window in the system
The part of size, can be the combination of software, hardware or both.
The computing module 21 can be, but not limited to be arranged at the first terminal.The neural network forecast mould
Block 22 can be, but not limited to be arranged at the first terminal.
In a kind of alternative of the present embodiment, the neural network forecast module is periodically handled up according to
Rate, determining the size of the corresponding congestion window of the first terminal can include：
Institute before the neural network forecast module periodically calculating current time in the first scheduled time length
The arithmetic average B of throughput is stated, the size W for determining congestion window is α × RTTmin×B；Wherein
α is predetermined constant, RTTminFor two-way time minimum in the first scheduled time length before current time.
In a kind of embodiment of this alternative, first scheduled time length is less than or equal to 500
Millisecond, more than or equal to the time interval for calculating the throughput；1≤α≤100.
Preferably, first scheduled time length can be 100 milliseconds, and α can be 2.
In a kind of embodiment of this alternative, the system can also include：
Congestion processing module, for true when having been issued to the first terminal but not receiving the first terminal
When the data volume recognized is not up to W, the first terminal is sent the data to using B as transmission rate；
When having been issued to the first terminal but not receiving the data volume of the first terminal confirmation more than W,
Pause sends data to the first terminal.
In present embodiment, the congestion processing module is the responsible portion for carrying out congestion control in the system
Point, can be the combination of software, hardware or both.
In present embodiment, the congestion processing module can be, but not limited to be arranged at and first terminal interaction
Application server on.When congestion processing module is arranged at application server, and computing module 21 and net
When network prediction module 22 is arranged at the first terminal, congestion processing module is needed from the first terminal
Obtain the information such as the size of congestion window.
In a kind of alternative of the present embodiment, described system can also include：
Passive control module, for when the first terminal starts and is not up to the second scheduled time length,
Congestion control is carried out using transmission control protocol slow turn-on mode.
It is other to realize details reference can be made to embodiment one.
Below the present embodiment, application scenarios such as Fig. 3 institutes of this implementation example are illustrated with an implementation
Show, wherein, interaction physical layer control frame, passes through base station and mid-level net between the first terminal and base station
Close and application server interacts uplink and downlink data.
The computing module and the neural network forecast module are arranged at the first terminal.The congestion processing
Module is arranged at the application server.The first terminal will predict the big of bandwidth B and congestion window
Small W is sent to the application server.
The computing module be used for the physical layer parameter MCS of real-time acquisition terminal and base station communication, RB,
TBS, calculates throughput.
The neural network forecast module calculates current prediction bandwidth B according to the throughput calculated in real time
With the size W of congestion window：
Average throughput (arithmetic average) before calculating in T time is as prediction bandwidth B, before calculating
Minimum two-way time RTT in T timemin, then size W=α × RTT of congestion windowmin× B, T take
100ms, α take 2.
The congestion processing module is transmitted control according to the size W of prediction bandwidth B and congestion window.
When occurring packet loss, if the size for having been issued to first terminal but not receiving the data volume of confirmation is no more than W
(unit：Byte), then with B (units：Byte per second) send number to first terminal for transmission rate
According to；If having been issued to first terminal but not receiving the size of the data volume of confirmation more than W, pause hair
Data are sent to first terminal, wait to be confirmed.When not occurring packet loss, it can be, but not limited to use TCP
The control of cubic algorithms is sent.During due to starting, there is no flow, B and RTT on networkminIt can not measure
Calculate, therefore the algorithm of TCP slow turn-ons can be used.
One of ordinary skill in the art will appreciate that all or part of step in the above method can pass through journey
Sequence instructs related hardware to complete, and described program can be stored in computer-readable recording medium, such as only
Read memory, disk or CD etc..Alternatively, all or part of step of above-described embodiment can also make
Realized with one or more integrated circuits.Correspondingly, each module/unit in above-described embodiment can be with
Realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The application is not limited
In the combination of the hardware and software of any particular form.
Certainly, the application can also have other various embodiments, spiritual and its essence without departing substantially from the application
In the case of, those skilled in the art work as can make various corresponding changes and change according to the application
Shape, but these corresponding changes and deformation should all belong to the protection domain of claims hereof.
Claims (10)
1. a kind of jamming control method, including：
Calculate first terminal and the throughput of service end；
Periodically according to the throughput, the size of the corresponding congestion window of the first terminal is determined.
2. the method as described in claim 1, it is characterised in that the periodicity is handled up according to
Rate, determining the size of the corresponding congestion window of the first terminal includes：
The arithmetic of the throughput before periodically calculating current time in the first scheduled time length is put down
Mean B, the size W for determining congestion window is α × RTTmin×B；Wherein α is predetermined constant, RTTmin
For two-way time minimum in the first scheduled time length before current time.
3. method as claimed in claim 2, it is characterised in that：
First scheduled time length is less than or equal to 500 milliseconds, is handled up more than or equal to described in calculating
The time interval of rate；
1≤α≤100。
4. method as claimed in claim 2, it is characterised in that：
First scheduled time length is 100 milliseconds, and α is 2.
5. method as claimed in claim 2, it is characterised in that also include：
When the data volume for having been issued to the first terminal but do not receive the first terminal confirmation is not up to
During W, the first terminal is sent the data to using B as transmission rate；When having been issued to described
One terminal but when not receiving data volume that the first terminal confirms more than W, suspends and sends data to institute
State first terminal.
6. a kind of congestion control system, it is characterised in that including：
Computing module, for calculating the throughput between first terminal and base station；
Neural network forecast module, for periodicity according to the throughput, determines that the first terminal is corresponding
The size of congestion window.
7. system as claimed in claim 6, it is characterised in that the neural network forecast module is periodically
According to the throughput, determining the size of the corresponding congestion window of the first terminal includes：
Institute before the neural network forecast module periodically calculating current time in the first scheduled time length
The arithmetic average B of throughput is stated, the size W for determining congestion window is α × RTTmin×B；Wherein
α is predetermined constant, RTTminFor two-way time minimum in the first scheduled time length before current time.
8. system as claimed in claim 7, it is characterised in that：
First scheduled time length is less than or equal to 500 milliseconds, is handled up more than or equal to described in calculating
The time interval of rate；
1≤α≤100。
9. system as claimed in claim 7, it is characterised in that：
First scheduled time length is 100 milliseconds, and α is 2.
10. system as claimed in claim 7, it is characterised in that also include：
Congestion processing module, for true when having been issued to the first terminal but not receiving the first terminal
When the data volume recognized is not up to W, the first terminal is sent the data to using B as transmission rate；
When having been issued to the first terminal but not receiving the data volume of the first terminal confirmation more than W,
Pause sends data to the first terminal.
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