CN104507174B - The data transmission method and system of wireless access points and terminal - Google Patents
The data transmission method and system of wireless access points and terminal Download PDFInfo
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- CN104507174B CN104507174B CN201410771827.2A CN201410771827A CN104507174B CN 104507174 B CN104507174 B CN 104507174B CN 201410771827 A CN201410771827 A CN 201410771827A CN 104507174 B CN104507174 B CN 104507174B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002452 interceptive effect Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 18
- 230000003993 interaction Effects 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
- H04L1/1678—Details of the supervisory signal the supervisory signal being transmitted together with control information where the control information is for timing, e.g. time stamps
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The present invention provides a kind of wireless access points and the data transmission method and system of terminal, wherein, method comprises the following steps：After beacon frame to terminal is sent, interframe space time is waited, then sends request to send frame to the terminal；Wherein, the request to send frame includes the occupancy moment of channel；Receiving the downlink that the terminal returns allows to send frame；Wherein, the terminal receives to generate the downlink after the request to send frame and allow to send frame sends downlink data frame at the occupancy moment of the channel to the terminal；It receives the downlink that the terminal returns and confirms character；Wherein, after downlink data frame described in occupancy reception of the terminal in the channel, the downlink is generated after the short interFrameGap time and confirms character.By sending request to send frame to terminal when transmitting data, the request to send frame includes the occupancy moment of channel, so as to achieve the effect that solve the problems, such as that throughput of system declines under multi-user.
Description
Technical field
The present invention relates to wireless communication technology fields, are passed more particularly to the data of a kind of wireless access points and terminal
The data transmission system of transmission method and wireless access points and terminal.
Background technology
At present, the master of WLAN (Wireless Local Area Networks, Wireless LAN) networks and terminal room
Access way is wanted to be accessed for DCF (Distributed Coordination Function, distributed coordination function), is base
The application of communication channel and occupancy are carried out in competition mechanism, is carrying out wireless access points (AP, Wireless Access
Point) interacted during uplink and downlink data interaction with terminal using distributed data.
Under a small amount of user, the distributed data interactive mode of DCF is a kind of higher mode for the utilization of channel.But
It is when number of users rises, due to CSMA/CA (the Carrier Sense Multiple Access with of use
Collision Avoidance, Carrier Sense Multiple Access/conflict avoidance), a part of resource of system is caused to be consumed multi-purpose
Competition between family and keep out of the way.So result in the handling capacity for being practically used for transmission that can decline, and the more competitions of user are more
Substantially, so as to which actual throughput degradation is also more, it might even be possible to drop to less than the 1/3 of single user handling capacity.
It can be seen that the distributed data interaction of above-mentioned DCF is due to the mechanism of CSMA/CA so that in the situation of multi-user
Lower throughput of system declines.
The content of the invention
Based on this, it is necessary to for existing distributed data interaction in the case of multi-user throughput of system decline ask
Topic, provides the data transmission method of a kind of wireless access points and terminal and the data transmission of wireless access points and terminal
System.
The data transmission method of a kind of wireless access points and terminal, comprises the following steps：
After beacon frame to terminal is sent, interframe space time is waited, then sends request to send frame to the terminal；Its
In, the request to send frame includes the occupancy moment of channel；
Receiving the downlink that the terminal returns allows to send frame；Wherein, the terminal is produced after receiving the request to send frame
The raw downlink allows to send frame；
At the occupancy moment of the channel downlink data frame is sent to the terminal；It is true to receive the downlink that the terminal returns
It reads symbol；Wherein, after downlink data frame described in occupancy reception of the terminal in the channel, during by short interFrameGap
Between after generate the downlink and confirm character.
A kind of data transmission system of wireless access points and terminal, including：
Sending module, for after beacon frame to terminal is sent, waiting interframe space time, then sending request to send frame
To the terminal；Wherein, the request to send frame includes the occupancy moment of channel；
Receiving module allows to send frame for receiving the downlink that the terminal returns；Wherein, the terminal receives described ask
Ask send frame after generate the downlink allow send frame；
It receives and confirms character module, for sending downlink data frame to the terminal at the occupancy moment of the channel；It connects
It receives the downlink that the terminal returns and confirms character；Wherein, lower line number described in occupancy reception of the terminal in the channel
After frame, the downlink is generated after the short interFrameGap time and confirms character.
The solution of the present invention is taken, by sending request to send frame, the request to send frame bag to terminal when transmitting data
Include the occupancy moment of channel；So that occupancy reception data of the terminal according to the channel, each terminal sequentially carry out
The reception of data, reduce because competition and the castle increased stand-by period, then reduce consumption between multi-user competition and
The system resource kept out of the way, reaching can solve the problems, such as that throughput of system declines under multi-user.
Description of the drawings
Fig. 1 is the flow chart of the data transmission method of the wireless access points and terminal in an embodiment；
Fig. 2 is the flow chart of the data transmission method of the wireless access points and terminal in another embodiment；
Fig. 3 is an embodiment wireless access points and the data interaction flow chart of terminal；
Fig. 4 is the structure diagram of the data transmission system of the wireless access points and terminal in an embodiment；
Fig. 5 is the structure diagram of the data transmission system of the wireless access points and terminal in another embodiment.
Specific embodiment
The data transmission method and system of the wireless access points to the present invention and terminal is specific below in conjunction with the accompanying drawings
Embodiment is described in detail.
Referring to Fig. 1, Fig. 1 is the wireless access points and the flow of the data transmission method of terminal in an embodiment
Figure.
The data transmission method of a kind of wireless access points and terminal, comprises the following steps：
Step S120：After beacon frame to terminal is sent, interframe space time is waited, then sends request to send frame to institute
State terminal；Wherein, the request to send frame includes the occupancy moment of channel；
In the step s 120, interframe space can be centralized interframe space (PIFS, Point Coordination
Function Interframe Space) or distributed inter-frame space (DIFS, Distributed Coordination
Function Interframe Space)；Sending that the beacon frame represents will be to the terminal into line number in the next time
According to transmission, and determined at the time of data transmission by the occupancy moment of the channel；So that terminal accounting for according to the channel
With reception data, each terminal sequentially carries out the reception of data, reduces because of competition and castle increased stand-by period,
Then the system resource that consumption is competed and kept out of the way between multi-user is reduced, reaching can solve under multi-user under throughput of system
The effect of the problem of drop.
In one embodiment, the wireless access points of the present embodiment and the data transmission method of terminal can also wrap
It includes：
Before beacon frame to terminal is sent, judge whether access customer number reaches the threshold value of setting；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
When access customer number is not reaching to the threshold value of setting, using distributed data interactive mode and terminal into line number
Higher for the utilization of channel according to transmitting, the handling capacity of system is also higher；And when number of users reaches the threshold value of setting, it takes
The distributed data that disappears interactive mode, and the beacon frame is sent to the terminal, carry out the subsequent step to terminal data transmission；
No matter so as to reach more than access customer number or less, the effect of higher throughput of system can be kept.
In one embodiment, the wireless access points of the present embodiment and the data transmission method of terminal can also wrap
It includes：
Before beacon frame to terminal is sent, pass through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
Pass through online terminal described in wireless exploration so that not online terminal can be excluded when associating the terminal, so as to
Improve the efficiency for associating the terminal.
In one embodiment, the interframe space can be centralized interframe space.
After beacon frame to terminal is sent, centralized interframe space is shorter than distributed inter-frame space, is conducive to shorten to end
The time carried out data transmission is held, so as to improve the handling capacity of system.
Step S140：Receiving the downlink that the terminal returns allows to send frame；Wherein, the terminal receives the request hair
It send and the downlink is generated after frame allows to send frame；
In step S140, the terminal is after the request to send frame (RTS, Request To Send) is received, quilt
Inform that preparation returns to downlink CTS (the Clear TO while receiving data by the occupancy reception data of channel
Send allows to send frame).The effect that the downlink allows to send frame is to inform that wireless access points can transmit data.
Step S160：At the occupancy moment of the channel downlink data frame is sent to the terminal；The terminal is received to return
The downlink returned confirms character；Wherein, after downlink data frame described in occupancy reception of the terminal in the channel, through too short
The downlink is generated after interframe space time and confirms character.
In step S160, the downlink confirms that the effect of character is to represent that the terminal has received the downlink data
Frame；Short interFrameGap is more shorter than other interframe spaces, is conducive to shorten the time that the terminal returns to the downlink confirmation character,
So as to improve the handling capacity of system.
The wireless access points of the present embodiment and the data transmission method of terminal, the channel the occupancy moment to institute
State terminal and send downlink data frame and cause occupancy reception data of the terminal according to the channel, each terminal sequentially into
The reception of row data was reduced because of competition and castle increased stand-by period, and it is competing between multi-user can then to reduce consumption
The system resource striven and kept out of the way can solve the problems, such as that throughput of system declines under multi-user.
Referring to Fig. 2, Fig. 2 is the wireless access points and the flow of the data transmission method of terminal in another embodiment
Figure.
The data transmission method of a kind of wireless access points and terminal, comprises the following steps：
Step S210：After beacon frame to terminal is sent, interframe space time is waited, then sends request to send frame to institute
State terminal；Wherein, the request to send frame includes the occupancy moment of channel；
In step S210, interframe space can be centralized interframe space or distributed inter-frame space；Send the letter
Mark frame expression will carry out data transmission in the next time to the terminal, and accounting for by channel at the time of data transmission
With determining constantly；So that occupancy reception data of the terminal according to the channel, each terminal sequentially carry out data
It receives, reduces because of competition and castle increased stand-by period, then reduce what consumption was competed and kept out of the way between multi-user
System resource achievees the effect that solve the problems, such as that throughput of system declines under multi-user.
In one embodiment, the wireless access points of the present embodiment and the data transmission method of terminal can also wrap
It includes：
Before beacon frame to terminal is sent, judge whether access customer number reaches the threshold value of setting；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
When access customer number is not reaching to the threshold value of setting, using distributed data interactive mode and terminal into line number
Higher for the utilization of channel according to transmitting, the handling capacity of system is also higher；And when number of users reaches the threshold value of setting, it takes
The distributed data that disappears interactive mode, and the beacon frame is sent to the terminal, carry out the subsequent step to terminal data transmission；
No matter so as to reach more than access customer number or less, the effect of higher throughput of system can be kept.
In one embodiment, the wireless access points of the present embodiment and the data transmission method of terminal can also wrap
It includes：
Before beacon frame to terminal is sent, pass through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
Pass through online terminal described in wireless exploration so that not online terminal can be excluded when associating the terminal, so as to
Improve the efficiency for associating the terminal.
In one embodiment, the interframe space can be centralized interframe space.
After beacon frame to terminal is sent, centralized interframe space is shorter than distributed inter-frame space, is conducive to shorten to end
The time carried out data transmission is held, so as to improve the handling capacity of system.
Step S220：Receiving the downlink that the terminal returns allows to send frame；Wherein, the terminal receives the request hair
It send and the downlink is generated after frame allows to send frame；
In step S220, for the terminal after the request to send frame is received, being apprised of will be in the occupancy of channel
It carves and receives data, preparation returns to the downlink while receiving data allow to send frame.The downlink allows the effect for sending frame
It is to inform that wireless access points can transmit data.
Step S230：At the occupancy moment of the channel downlink data frame is sent to the terminal；The terminal is received to return
The downlink returned confirms character；Wherein, after downlink data frame described in occupancy reception of the terminal in the channel, through too short
The downlink is generated after interframe space time and confirms character；
In step S230, the downlink confirms that the effect of character is to represent that the terminal has received the downlink data
Frame；Short interFrameGap is more shorter than other interframe spaces, is conducive to shorten the time that the terminal returns to the downlink confirmation character,
So as to improve the handling capacity of system.
S240：After the downlink confirmation character that the terminal returns is received, by the interframe space time, to the end
End, which sends uplink, to be allowed to send frame；Wherein, the uplink allows transmission frame to include：The address information of the terminal and accounting for for setting
With the time span of channel；
In step S240, the interframe space can be centralized interframe space or distributed inter-frame space；On described
Row allows transmission frame to include：The time span of the address information of the terminal and the busy channel of setting, represents and the terminal
The corresponding terminal of address information can carry out data transmission in the time span of the busy channel of setting so that each
Terminal sequentially and in the time span of the busy channel of setting carries out data transmission, and then can reduce because of competition and castle
The increased stand-by period reduces the system resource that consumption is competed and kept out of the way between multi-user, reaches and solve multi-user's
In the case of system throughput degradation the problem of effect.
In one embodiment, the interframe space can be centralized interframe space.
After the downlink confirmation character that the terminal returns is received, centralized interframe space is shorter than distributed inter-frame space,
Be conducive to shorten the time to terminal data transmission, so as to improve the handling capacity of system.
In one embodiment, before allowing to send frame to terminal transmission uplink, can also include：
The historical time length of the terminal transmission data is obtained, letter is occupied according to the historical time length computation
The time span in road.
It pair is counted with the historical time length of the terminal transmission data, mean value formula can be utilized to calculate the time long
Average is spent, formula of variance can be utilized to calculate time span variance, for the terminal that time span variance is larger, in time span
It can significantly be adjusted according to the historical time length of statistics on the basis of average, for time span variance smaller end
End, can carry out subtle adjustment on the basis of time span average.
S250：The upper of the terminal return is received according to the address information of the terminal in the time span of busy channel
Row data frame；Wherein, the terminal receives the uplink and allows to generate the uplink data frames after sending frame；
Terminal corresponding with the address information of the terminal can return to line number after receiving the uplink and allowing to send frame
According to frame, carry out data transmission.
S260：Feeding back uplink confirms character to the terminal after the uplink data frames are received.
The uplink confirms that the effect of character is to inform that the terminal has received the uplink data frames.
The wireless access points of the present embodiment and the data transmission method of terminal, during downlink data transmission, in the letter
The occupancy moment in road sends downlink data frame to the terminal and causes occupancy reception number of the terminal according to the channel
According to each terminal sequentially carries out the reception of data；During transmitting uplink data, pass through the address information of the terminal and accounting for for setting
With the time span of channel, terminal corresponding with the address information of the terminal can be in the time span of the busy channel of setting
Inside carry out data transmission so that each terminal sequentially and in the time span of the busy channel of setting carries out data transmission；From
And reduce because competition and the castle increased stand-by period, can then reduce consumption compete and keep out of the way between multi-user be
System resource can solve the problems, such as that throughput of system declines under multi-user.
In order to further explain in detail the data transmission method of wireless access points of the present invention and terminal, below will
It is illustrated with reference to concrete application example.
This concrete application example carries out data interaction using wireless access points and terminal.
Fig. 3 is refer to, Fig. 3 is an embodiment wireless access points and the data interaction flow chart of terminal.
First determine whether access customer number reaches the threshold value of setting, if access customer number is not up to the threshold set
Value is then carried out data transmission using the distributed data interactive mode based on CSMA/CA.If access customer number reaches the door of setting
Then wireless access points by the online terminal of wireless exploration and carry out the online terminal of communication association to threshold value.Then wirelessly visiting
It asks that access point sends beacon frame to channel, after all terminals receive, waits the PIFS times, uplink and downlink data friendship is carried out to terminal 1
Mutually.Terminal 1 can be determined at random to be selected in all associated terminals by the wireless access points by priority mechanism
It takes.
When carrying out downlink data transmission, the wireless access points send request to send frame to the terminal 1；Wherein,
The request to send frame includes the occupancy moment of channel；Terminal 1 accesses after receiving the request to send frame to the accessing wirelessly
Point, which sends downlink, to be allowed to send frame.Then the wireless access points the channel the occupancy moment to terminal 1 transmission under
Row data frame.The terminal 1 is after the downlink data frame is received, by the SIFS times, to the wireless access points
Feeding back downlink confirms character.
When carrying out transmitting uplink data, the wireless access points pass through the PIFS times, and uplink is sent to the terminal 1
Allow to send frame；Wherein, the uplink allows transmission frame to include：The address information of the terminal 1 and the busy channel of setting
Time span；In the time span of the busy channel, terminal, that is, terminal 1 corresponding with the address information of the terminal 1 to
The wireless access points send uplink data frames；The wireless access points were received after the uplink data frames to end
1 feeding back uplink is held to confirm character.
After the uplink and downlink data interaction of complete paired terminal 1, uplink and downlink data interaction, followed by terminal 3 are carried out to terminal 2,
Terminal 4 ... ... terminal n, until all users complete uplink and downlink data interaction.
Referring to Fig. 4, Fig. 4 shows for the wireless access points in an embodiment and the structure of the data transmission system of terminal
It is intended to.
A kind of data transmission system of wireless access points and terminal, including：
Sending module 320 for after beacon frame to terminal is sent, waiting interframe space time, then sends request hair
Frame is sent to the terminal；Wherein, the request to send frame includes the occupancy moment of channel；
Interframe space can be centralized interframe space or distributed inter-frame space；The beacon frame is sent to represent in the case where connecing
The time come will carry out data transmission to the terminal, and be determined at the time of data transmission by the occupancy moment of the channel；From
And cause occupancy reception data of the terminal according to the channel, each terminal sequentially carries out the reception of data, reduce because
Competition and castle increased stand-by period then reduce the consumption system resource that competes and keep out of the way between multi-user, can be with
Solve the problems, such as that throughput of system declines under multi-user.
In one embodiment, the data transmission system of the wireless access points of described the present embodiment and terminal can be with
Including：
Judgment module, for before beacon frame to terminal is sent, judging whether access customer number reaches the threshold of setting
Value；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
When access customer number is not reaching to the threshold value of setting, using distributed data interactive mode and terminal into line number
Higher for the utilization of channel according to transmitting, the handling capacity of system is also higher；And when number of users reaches the threshold value of setting, it takes
The distributed data that disappears interactive mode, and the beacon frame is sent to the terminal, carry out the subsequent step to terminal data transmission；
No matter so as to reach more than access customer number or less, the effect of higher throughput of system can be kept.
In one embodiment, the data transmission system of the wireless access points of the present embodiment and terminal can also wrap
It includes：
Relating module is detected, for before beacon frame to terminal is sent, passing through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
Pass through online terminal described in wireless exploration so that not online terminal can be excluded when associating the terminal, so as to
The efficiency for associating the terminal can be improved.
In one embodiment, the interframe space can be centralized interframe space.
After beacon frame to terminal is sent, centralized interframe space is shorter than distributed inter-frame space, is conducive to shorten to end
The time carried out data transmission is held, so as to improve the handling capacity of system.
Receiving module 340 allows to send frame for receiving the downlink that the terminal returns；Wherein, the terminal receives institute
It states and the downlink is generated after request to send frame allows to send frame；
For the terminal after the request to send frame is received, being apprised of will be in the occupancy reception data of channel, standard
The downlink CTS is returned while standby reception data.The effect that the downlink allows to send frame is to inform wireless access points
Data can be transmitted.
It receives and confirms character module 360, for sending downlink data frame to the terminal at the occupancy moment of the channel；
It receives the downlink that the terminal returns and confirms character；Wherein, downlink described in occupancy reception of the terminal in the channel
After data frame, the downlink is generated after the short interFrameGap time and confirms character.
The downlink confirms that terminal described in character representation has received the downlink data frame；Short interFrameGap is than other frames
Between be spaced shorter, be conducive to shorten the terminal and return to the time that the downlink confirms character, so as to improve the handling capacity of system.
The wireless access points of the present embodiment and the data transmission system of terminal, the channel the occupancy moment to institute
State terminal and send downlink data frame and cause occupancy reception data of the terminal according to the channel, each terminal sequentially into
The reception of row data was reduced because of competition and castle increased stand-by period, and it is competing between multi-user can then to reduce consumption
The system resource striven and kept out of the way can solve the problems, such as that throughput of system declines under multi-user.
Referring to Fig. 5, Fig. 5 is the wireless access points and the structure of the data transmission system of terminal in another embodiment
Schematic diagram.
A kind of data transmission system of wireless access points and terminal, including：
Sending module 410 for after beacon frame to terminal is sent, waiting interframe space time, then sends request hair
Frame is sent to the terminal；Wherein, the request to send frame includes the occupancy moment of channel；
Interframe space can be centralized interframe space or distributed inter-frame space；The beacon frame is sent to represent in the case where connecing
The time come will carry out data transmission to the terminal, and be determined at the time of data transmission by the occupancy moment of the channel；From
And cause occupancy reception data of the terminal according to the channel, each terminal sequentially carries out the reception of data, reduce because
Competition and castle increased stand-by period then reduce the consumption system resource that competes and keep out of the way between multi-user, can be with
Solve the problems, such as that throughput of system declines under multi-user.
In one embodiment, the data transmission system of the wireless access points of the present embodiment and terminal can also wrap
It includes：
Judgment module, for before beacon frame to terminal is sent, judging whether access customer number reaches the threshold of setting
Value；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
When access customer number is not reaching to the threshold value of setting, using distributed data interactive mode and terminal into line number
Higher for the utilization of channel according to transmitting, the handling capacity of system is also higher；And when number of users reaches the threshold value of setting, it takes
The distributed data that disappears interactive mode, and the beacon frame is sent to the terminal, carry out the subsequent step to terminal data transmission；
No matter so as to reach more than access customer number or less, the effect of higher throughput of system can be kept.
In one embodiment, the data transmission system of the wireless access points of the present embodiment and terminal can also wrap
It includes：
Relating module is detected, for before beacon frame to terminal is sent, passing through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
Pass through online terminal described in wireless exploration so that not online terminal can be excluded when associating the terminal, so as to
The efficiency for associating the terminal can be improved.
In one embodiment, the interframe space can be centralized interframe space.
After beacon frame to terminal is sent, centralized interframe space is shorter than distributed inter-frame space, is conducive to shorten to end
The time carried out data transmission is held, so as to improve the handling capacity of system.
Receiving module 420 allows to send frame for receiving the downlink that the terminal returns；Wherein, the terminal receives institute
It states and the downlink is generated after request to send frame allows to send frame；
For the terminal after the request to send frame is received, being apprised of will be in the occupancy reception data of channel, standard
The downlink is returned while standby reception data to be allowed to send frame.The effect that the downlink allows to send frame is to inform accessing wirelessly
Access point can transmit data.
It receives and confirms character module 430, for sending downlink data frame to the terminal at the occupancy moment of the channel；
It receives the downlink that the terminal returns and confirms character；Wherein, downlink described in occupancy reception of the terminal in the channel
After data frame, the downlink is generated after the short interFrameGap time and confirms character；
The downlink confirms that terminal described in character representation has received the downlink data frame；Short interFrameGap is than other frames
Between be spaced shorter, be conducive to shorten the terminal and return to the time that the downlink confirms character, so as to improve the handling capacity of system.
Sending uplink allows to send frame module 440, for after the downlink confirmation character that the terminal returns is received, passing through
The interframe space time, sending uplink to the terminal allows to send frame；Wherein, the uplink allows transmission frame to include：Institute
State the address information of terminal and the time span of the busy channel of setting；
The interframe space can be centralized interframe space or distributed inter-frame space；The uplink allows to send frame bag
It includes：The address information of the terminal and the time span of the busy channel of setting represent, corresponding with the address information of the terminal
Terminal can carry out data transmission in the time span of the busy channel of setting so that each terminal sequentially and is being set
When carrying out data transmission in the time span of fixed busy channel, and then wait increased because of competition and castle can be reduced
Between, reduce the consumption system resource that competes and keep out of the way between multi-user and reach and solve the system in the case of multi-user
The effect of throughput degradation problem.
In one embodiment, the interframe space can be centralized interframe space.
After the downlink confirmation character that the terminal returns is received, centralized interframe space is shorter than distributed inter-frame space,
Be conducive to shorten the time to terminal data transmission, so as to improve the handling capacity of system.
In one embodiment, the transmission uplink allows transmission frame module that can also include：
Computing module, for obtaining the historical time length of the terminal transmission data, according to the historical time length
Calculate the time span of the busy channel.
It pair is counted with the historical time length of the terminal transmission data, mean value formula can be utilized to calculate the time long
Average is spent, formula of variance can be utilized to calculate time span variance, it, can be in the time for the terminal that time span variance is larger
Historical time length on the basis of length average according to statistics is significantly adjusted, for time span variance smaller end
End, can carry out subtle adjustment on the basis of time span average.
Return module 450, in the time span of busy channel according to the address information of the terminal receive described in
The uplink data frames that terminal returns；Wherein, the terminal receives the uplink and allows to generate the uplink data frames after sending frame；
Terminal corresponding with the address information of the terminal can return to line number after receiving the uplink and allowing to send frame
According to frame, carry out data transmission.
Feedback module 460, for after the uplink data frames are received feeding back uplink confirm character to the terminal.
The uplink confirms that the effect of character is to inform that the terminal has received the uplink data frames.
The wireless access points of the present embodiment and the data transmission system of terminal, during downlink data transmission, in the letter
The occupancy moment in road sends downlink data frame to the terminal and causes occupancy reception number of the terminal according to the channel
According to each terminal sequentially carries out the reception of data；During transmitting uplink data, pass through the address information of the terminal and accounting for for setting
With the time span of channel, terminal corresponding with the address information of the terminal can be in the time span of the busy channel of setting
Inside carry out data transmission so that each terminal sequentially and in the time span of the busy channel of setting carries out data transmission；From
And reduce because competition and the castle increased stand-by period, can then reduce consumption compete and keep out of the way between multi-user be
System resource can solve the problems, such as that throughput of system declines under multi-user.
It is to be understood that in the wireless access points of the present invention and the data transmission method and system of terminal, and
The technical solution illustrated in above preferred embodiment is not limited to, the technical solution that can also be taken other form is, it can be achieved that solution
The effect of the throughput degradation problem of system certainly in the case of multi-user.
The present invention wireless access points and terminal data transmission system with the present invention wireless access points with
The data transmission method of terminal corresponds, and is explained in the embodiment of above-mentioned wireless access points and the data transmission method of terminal
The technical characteristic and its advantage stated suitable for the embodiment of wireless access points and the data transmission system of terminal,
Hereby give notice that.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. the data transmission method of a kind of wireless access points and terminal, which is characterized in that comprise the following steps：
After beacon frame to terminal is sent, interframe space time is waited, then sends request to send frame to the terminal；Wherein,
The request to send frame includes the occupancy moment of channel；
Receiving the downlink that the terminal returns allows to send frame；Wherein, the terminal generates institute after receiving the request to send frame
Stating downlink allows to send frame；
At the occupancy moment of the channel downlink data frame is sent to the terminal；It receives the downlink that the terminal returns and confirms word
Symbol；Wherein, after downlink data frame described in occupancy reception of the terminal in the channel, after the short interFrameGap time
It generates the downlink and confirms character；
After the downlink confirmation character that the terminal returns is received, by the interframe space time, in terminal transmission
Row allows to send frame；Wherein, the uplink allows transmission frame to include：The address information of the terminal and the busy channel of setting
Time span；
The uplink data frames of the terminal return are received according to the address information of the terminal in the time span of busy channel；
Wherein, the terminal receives the uplink and allows to generate the uplink data frames after sending frame；
Feeding back uplink confirms character to the terminal after the uplink data frames are received.
2. the data transmission method of wireless access points according to claim 1 and terminal, which is characterized in that also wrap
It includes：
Before beacon frame to terminal is sent, judge whether access customer number reaches the threshold value of setting；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
3. the data transmission method of wireless access points according to claim 1 and terminal, which is characterized in that also wrap
It includes：
Before beacon frame to terminal is sent, pass through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
4. the data transmission method of wireless access points according to claim 1 and terminal, which is characterized in that the frame
Between at intervals of centralized interframe space.
5. the data transmission method of wireless access points according to claim 1 and terminal, which is characterized in that institute
Stating terminal transmission uplink allows before sending frame, further includes：
The historical time length of the terminal transmission data is obtained, according to busy channel described in the historical time length computation
Time span.
6. a kind of data transmission system of wireless access points and terminal, which is characterized in that including：
Sending module for after beacon frame to terminal is sent, waiting interframe space time, then sends request to send frame to institute
State terminal；Wherein, the request to send frame includes the occupancy moment of channel；
Receiving module allows to send frame for receiving the downlink that the terminal returns；Wherein, the terminal receives the request hair
It send and the downlink is generated after frame allows to send frame；
It receives and confirms character module, for sending downlink data frame to the terminal at the occupancy moment of the channel；Receive institute
The downlink for stating terminal return confirms character；Wherein, downlink data frame described in occupancy reception of the terminal in the channel
Afterwards, the downlink is generated after the short interFrameGap time and confirms character；
Sending uplink allows to send frame module, after confirming character in the downlink for receiving the terminal return, by the frame
Between interval time, to the terminal send uplink allow send frame；Wherein, the uplink allows transmission frame to include：The terminal
Address information and setting busy channel time span；
Module is returned, is returned for receiving the terminal according to the address information of the terminal in the time span of busy channel
Uplink data frames；Wherein, the terminal receives the uplink and allows to generate the uplink data frames after sending frame；
Feedback module, for after the uplink data frames are received feeding back uplink confirm character to the terminal.
7. the data transmission system of wireless access points according to claim 6 and terminal, which is characterized in that also wrap
It includes：
Judgment module, for before beacon frame to terminal is sent, judging whether access customer number reaches the threshold value of setting；
If so, beacon frame is sent to terminal；If it is not, carried out data transmission using distributed data interactive mode with terminal.
8. the data transmission system of wireless access points according to claim 6 and terminal, which is characterized in that also wrap
It includes：
Relating module is detected, for before beacon frame to terminal is sent, passing through the online terminal of wireless exploration；
It establishes and carries out communication association with online terminal.
9. the data transmission system of wireless access points according to claim 6 and terminal, which is characterized in that the frame
Between at intervals of centralized interframe space.
10. the data transmission system of wireless access points according to claim 6 and terminal, which is characterized in that described
Sending uplink allows transmission frame module to further include：
Computing module, for obtaining the historical time length of the terminal transmission data, according to the historical time length computation
The time span of the busy channel.
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| CN105471563B (en) * | 2015-11-16 | 2018-12-07 | 海能达通信股份有限公司 | Dynamically distribute pulling method and communication equipment in the data of up channel |
| CN109088700B (en) * | 2018-08-30 | 2021-10-29 | 珠海泰芯半导体有限公司 | Wireless communication method |
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| EP1601126A2 (en) * | 2004-05-28 | 2005-11-30 | Kabushiki Kaisha Toshiba | Transmission of feedback information in a wireless communications system |
| CN1898913A (en) * | 2004-05-31 | 2007-01-17 | 松下电器产业株式会社 | Radio communication method and radio communication device |
| CN102469470A (en) * | 2010-11-04 | 2012-05-23 | 中兴通讯股份有限公司 | Transmission method and device in wireless local area network |
| CN102468946A (en) * | 2010-11-08 | 2012-05-23 | 中兴通讯股份有限公司 | Multi-user transmission method and access point |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1601126A2 (en) * | 2004-05-28 | 2005-11-30 | Kabushiki Kaisha Toshiba | Transmission of feedback information in a wireless communications system |
| CN1898913A (en) * | 2004-05-31 | 2007-01-17 | 松下电器产业株式会社 | Radio communication method and radio communication device |
| CN102469470A (en) * | 2010-11-04 | 2012-05-23 | 中兴通讯股份有限公司 | Transmission method and device in wireless local area network |
| CN102468946A (en) * | 2010-11-08 | 2012-05-23 | 中兴通讯股份有限公司 | Multi-user transmission method and access point |
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