CN107567108A - Communication means, communicator, website and the access point of WLAN - Google Patents
Communication means, communicator, website and the access point of WLAN Download PDFInfo
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- CN107567108A CN107567108A CN201610514709.2A CN201610514709A CN107567108A CN 107567108 A CN107567108 A CN 107567108A CN 201610514709 A CN201610514709 A CN 201610514709A CN 107567108 A CN107567108 A CN 107567108A
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Abstract
The invention provides a kind of communication means of WLAN, communicator, website and access point, wherein, the communication means of WLAN, including：Generate notification message frame, include resource block information of the website by the progress uplink selected in OFDMA competing cycles of OFDMA Back off mechanism in the notification message frame, the notification message frame is used for whether the resource block information that access point determines that the resource block information that the website is chosen is chosen with other websites to clash；The notification message frame is sent to described access point.Technical scheme can avoid multiple websites take OFDMA Back off mechanism choose to same resource block and to follow-up communication band to conflict the problem of, it ensure that OFDMA technologies are applied in 802.11ax, meet 802.11ax communication requirement.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of communication party of WLAN
Method, a kind of communicator of WLAN, a kind of website and a kind of access point.
Background technology
In May, 2013,802.11 set up Wi-Fi of future generation (Wireless Fidelity, wirelessly
Fidelity) technology seminar HEW (High efficiency WLAN, efficient WLAN),
That is 802.11ax, main research point are to improve the handling capacity of existing Wi-Fi technology, improve frequency spectrum
Effective utilization ratio, Consumer's Experience and service quality Q oE (Quality of Experience) are improved,
And realize the communication environment that more crypto set is adapted to than existing Wi-Fi technology.
OFDMA (Orthogonal Frequency Division will be used in 802.11ax
Multiple Access, OFDM) technology, while in order to each STA (Station,
Website) distribution resource, a kind of new resource allocation message frame defined in 802.11ax, is referred to as triggered
Frame.Wherein, trigger frame to website distribute resource a kind of mode be initialization website receive it is tactile
OFDMA technology RACHs will be used after hair frame, specifically website maintains random number, and then
Wireless resource block is randomly selected to carry out uplink communication.But because STAs may be produced equally
Random number, and then be possible to that same resource block can be chosen, can thus give follow-up communication band
Conflict, and for how to avoid this problem, the solution of correlation is not suggested that at present.
The content of the invention
The present invention is based at least one above-mentioned technical problem, it is proposed that a kind of new WLAN
Communication plan, multiple websites can be avoided to take OFDMA Back-off mechanism to choose to same
Resource block and to follow-up communication band to conflict the problem of, it is ensured that OFDMA technologies are in 802.11ax
In be applied, meet 802.11ax communication requirement.
In view of this, according to the first aspect of the invention, it is proposed that a kind of communication party of WLAN
Method, including：Notification message frame is generated, including website in the notification message frame passes through OFDMA
The resource block letter of Back-off mechanism progress uplink selected in OFDMA competing cycles
Breath, the notification message frame are used for access point and determine the resource block information of the website selection and other stations
Whether the resource block information that point is chosen clashes；The notification message frame is sent to described access point.
In the technical scheme, website is by generating notification message frame, the resource block that will be randomly selected
Information is notified to access point so that access point can be according to the notification message frame that multiple websites are sent come really
Whether the resource block information that fixed multiple websites are chosen clashes, and then can be it is determined that clashing
When, the collision avoidance mechanism (as redistributed resource block for multiple websites) of correlation is taken, is avoided
Multiple websites take OFDMA Back-off mechanism to choose to same resource block and to follow-up communication
The problem of bringing conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
Wherein, OFDMA Back-off mechanism is mainly that website is receiving the triggering of access point transmission
The random access procedure initiated after frame, it is specially：When website has data to need to send, if detecting letter
Road hurries, then from 0 to OFDMA competition windows (Contention Window) select a random number
N, and continue to detect channel and successively decreased according to the interval of each resource block distributed, if again
Secondary to detect channel busy, then N is constant, if detecting the channel spare time, N-1, and as N=0, if
The channel spare time is detected again, then sends data, if detecting channel busy again, reselect one
Random number, and said process is performed again.
In the above-mentioned technical solutions, it is preferable that the communication means of the WLAN, in addition to：
Described access point is received it is determined that the resource that the resource block information that the website is chosen is chosen with other websites
Deallocated resources block message when block message clashes；Believed according to the deallocated resources block
Breath sends uplink data frames.
In the technical scheme, by receiving access point deallocated resources block message so that standing
When the resource block information that the resource block information that point is chosen is chosen with other websites clashes, it can use
Access point deallocated resources block message sends uplink data frames, avoids between other websites
Communication produce conflict.
In any of the above-described technical scheme, it is preferable that it is described generation notification message frame the step of it
Before, in addition to：Receive the communication resource distribution message frame that described access point is sent, the communication resource
Assignment messages frame is used to indicate resource block information to be chosen to website；Generation carries out the OFDMA
The random number of Back-off mechanism, selected according to the random number in the resource block information for treating selection
Select the resource block information of the progress uplink.
Wherein, selected to carry out the resource of uplink in the resource block information for treat selection according to random number
The process of block message is specially：After random number N is chosen, channel status is detected and according to each point
The interval of the resource block prepared is successively decreased, if detecting channel busy, N is constant, if detecting
Channel is not busy, then N-1, as N=0, if detecting the channel spare time again, is treating the resource block of selection
Selection carries out the resource block information of uplink in information, if detecting channel busy again, gives birth to again
Into a random number, and said process is performed again.
According to the second aspect of the invention, it is also proposed that a kind of communication means of WLAN, bag
Include：The notification message frame that receiving station is sent, include the website in the notification message frame and pass through
The money of OFDMA Back-off mechanism progress uplink selected in OFDMA competing cycles
Source block information；The notification message frame sent according to multiple websites, determine that the multiple website is chosen
Resource block information whether clash；It is determined that the resource block information that the multiple website is chosen occurs
During conflict, to the multiple website redistribute carry out uplink resource block information, and notify to
The multiple website.
In the technical scheme, pass through the notification message frame of receiving station transmission, enabling according to more
The notification message frame that individual website is sent determines whether the resource block information that multiple websites are chosen clashes,
And then it can redistribute resource block information when it is determined that clashing to multiple websites, avoid more
Individual website takes OFDMA Back-off mechanism to choose to same resource block and to follow-up communication band
The problem of to conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
For example：When STA1 and STA2 have chosen resource block 1, AP (Access Point,
Access point) determine that STA1 and STA2 subsequent communications can clash, and then can be by resource block
1 distributes to STA1, and remaining resource block, such as resource block 2 are distributed into STA2.
Wherein, when multiple websites choose identical resource block, AP can be built according to website and AP
The size for the AID (Association Identifier, association identification) that AP is distributed is come during vertical association
Redistribute resource block.Such as：When STA1 and STA2 have chosen resource block 1, if
The AID that STA1 AID is 7, STA2 is 99, then AP can be according to station larger AID
Point first obtains the principle of resource block, and resource block 1 is distributed into STA2, then will not be selected
Surplus resources block distributes to STA1.It is of course also possible to resource is first obtained according to the less websites of AID
The principle of block is distributed resource block to website.
Further, deallocated resources block can associated the process of foundation by AP with STAs
In assigned AID bind together to be reassigned to and choose same resource block and cause the meeting that communicates
The STAs clashed.
In the above-mentioned technical solutions, it is preferable that in the step for the notification message frame that the receiving station is sent
Before rapid, in addition to：Communication resource distribution message frame is generated, the communication resource distribution message frame is used
In indicating resource block information to be chosen to website；Send the communication resource distribution message frame.
In the technical scheme, the resource block information to be chosen that is indicated in communication resource distribution message frame
Choose the resource block for carrying out uplink wherein by OFDMA Back-off mechanism for website.
According to the third aspect of the invention we, it is also proposed that a kind of communicator of WLAN, bag
Include：Generation unit, include website for generating notification message frame, in the notification message frame and pass through
The money of OFDMA Back-off mechanism progress uplink selected in OFDMA competing cycles
Source block information, the notification message frame be used for resource block information that access point determines that the website chooses with
Whether the resource block information that other websites are chosen clashes；Transmitting element, for described access point
Send the notification message frame.
In the technical scheme, website is by generating notification message frame, the resource block that will be randomly selected
Information is notified to access point so that access point can be according to the notification message frame that multiple websites are sent come really
Whether the resource block information that fixed multiple websites are chosen clashes, and then can be it is determined that clashing
When, the collision avoidance mechanism (as redistributed resource block for multiple websites) of correlation is taken, is avoided
Multiple websites take OFDMA Back-off mechanism to choose to same resource block and to follow-up communication
The problem of bringing conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
Wherein, OFDMA Back-off mechanism is mainly that website is receiving the triggering of access point transmission
The random access procedure initiated after frame, it is specially：When website has data to need to send, if detecting letter
Road hurries, then from 0 to OFDMA competition windows select a random number N, and continue detect channel and
Successively decreased according to the interval of each resource block distributed, if detecting channel busy again, N
It is constant, if detecting the channel spare time, N-1, as N=0, if detecting the channel spare time again, send out
Data are sent, if detecting channel busy again, reselect a random number, and perform again above-mentioned
Process.
In the above-mentioned technical solutions, it is preferable that the communicator of described WLAN, also wrap
Include：First receiving unit, for receiving described access point it is determined that the resource block letter that the website is chosen
Deallocated resources block message when the resource block information that breath is chosen with other websites clashes；It is described
Transmitting element is additionally operable to, and uplink data frames are sent according to the deallocated resources block message.
In the technical scheme, by receiving access point deallocated resources block message so that standing
When the resource block information that the resource block information that point is chosen is chosen with other websites clashes, it can use
Access point deallocated resources block message sends uplink data frames, avoids between other websites
Communication produce conflict.
In any of the above-described technical scheme, it is preferable that also include：Second receiving unit, for receiving
Described access point send communication resource distribution message frame, the communication resource distribution message frame be used for
Website indicates resource block information to be chosen；Processing unit, the OFDMA is carried out for generating
The random number of Back-off mechanism, selected according to the random number in the resource block information for treating selection
Select the resource block information of the progress uplink.
Wherein, selected to carry out the resource of uplink in the resource block information for treat selection according to random number
The process of block message is specially：After random number N is chosen, channel status is detected and according to each point
The interval of the resource block prepared is successively decreased, if detecting channel busy, N is constant, if detecting
Channel is not busy, then N-1, as N=0, if detecting the channel spare time again, is treating the resource block of selection
Selection carries out the resource block information of uplink in information, if detecting channel busy again, gives birth to again
Into a random number, and said process is performed again.
According to the fourth aspect of the invention, it is also proposed that a kind of communicator of WLAN, bag
Include：Receiving unit, for the notification message frame of receiving station transmission, included in the notification message frame
There is the website to enter by the way that OFDMA Back-off mechanism is selected in OFDMA competing cycles
The resource block information of row uplink；Determining unit, for the notice sent according to multiple websites
Message frame, determines whether the resource block information that the multiple website is chosen clashes；Allocation unit,
When resource block information for determining the multiple website selection in the determining unit clashes, to
The multiple website redistributes the resource block information for carrying out uplink；Notification unit, for by institute
Allocation unit deallocated resources block message is stated to notify to the multiple website.
In the technical scheme, pass through the notification message frame of receiving station transmission, enabling according to more
The notification message frame that individual website is sent determines whether the resource block information that multiple websites are chosen clashes,
And then it can redistribute resource block information when it is determined that clashing to multiple websites, avoid more
Individual website takes OFDMA Back-off mechanism to choose to same resource block and to follow-up communication band
The problem of to conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
For example：When STA1 and STA2 have chosen resource block 1, AP determine STA1 and
STA2 subsequent communications can clash, and then resource block 1 can be distributed into STA1, by it
Remaining resource block, as resource block 2 distributes to STA2.
Wherein, when multiple websites choose identical resource block, AP can be built according to website and AP
The AID that AP is distributed size redistributes resource block during vertical association.Such as：As STA1 and
When STA2 have chosen resource block 1, if the AID that STA1 AID is 7, STA2 is 99,
So AP can first obtain the principle of resource block according to website larger AID, and resource block 1 is distributed
To STA2, the surplus resources block not being selected then is distributed into STA1.It is of course also possible to
The principle of resource block is first obtained according to the less websites of AID to distribute resource block to website.
Further, deallocated resources block can associated the process of foundation by AP with STAs
In assigned AID bind together to be reassigned to and choose same resource block and cause the meeting that communicates
The STAs clashed.
In the above-mentioned technical solutions, it is preferable that also include：Generation unit, for receiving list described
Before the notification message frame that first receiving station is sent, communication resource distribution message frame, the communication are generated
Resource allocation message frame is used to indicate resource block information to be chosen to website；Transmitting element, for sending out
Send the communication resource distribution message frame.
In the technical scheme, the resource block information to be chosen that is indicated in communication resource distribution message frame
Choose the resource block for carrying out uplink wherein by OFDMA Back-off mechanism for website.
According to the fifth aspect of the invention, it is also proposed that a kind of website, including：Such as the above-mentioned third aspect
The communicator of described WLAN.
According to the sixth aspect of the invention, it is also proposed that a kind of access point, including：Four directions as described above
The communicator of WLAN described in face.
By above technical scheme, multiple websites can be avoided to take OFDMA Back-off mechanism to select
Get same resource block and to follow-up communication band to conflict the problem of, it is ensured that OFDMA technologies
It is applied in 802.11ax, meets 802.11ax communication requirement.
Brief description of the drawings
Fig. 1 shows showing for the communication means of WLAN according to first embodiment of the invention
Meaning flow chart；
Fig. 2 shows showing for the communicator of WLAN according to first embodiment of the invention
Meaning block diagram；
Fig. 3 shows the schematic block diagram of website according to an embodiment of the invention；
Fig. 4 shows showing for the communication means of the WLAN of second embodiment according to the present invention
Meaning flow chart；
Fig. 5 shows showing for the communicator of the WLAN of second embodiment according to the present invention
Meaning block diagram；
Fig. 6 shows the schematic block diagram of website according to an embodiment of the invention；
Fig. 7 shows the process signal of website competition RU according to first embodiment of the invention
Figure；
Fig. 8 is shown to be illustrated according to the website competition RU of second embodiment of present invention process
Figure.
Embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, with reference to attached
The present invention is further described in detail for figure and embodiment.It should be noted that not
In the case of conflict, the feature in embodiments herein and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still,
The present invention can also be different from other modes described here to implement using other, therefore, the present invention
Protection domain do not limited by following public specific embodiment.
Fig. 1 shows showing for the communication means of WLAN according to first embodiment of the invention
Meaning flow chart.
As shown in figure 1, the communication means of WLAN according to first embodiment of the invention,
Including：
Step S10, generates notification message frame, and including website in the notification message frame passes through
The money of OFDMA Back-off mechanism progress uplink selected in OFDMA competing cycles
Source block information, the notification message frame be used for resource block information that access point determines that the website chooses with
Whether the resource block information that other websites are chosen clashes.
Wherein, OFDMA Back-off mechanism is mainly that website is receiving the triggering of access point transmission
The random access procedure initiated after frame, it is specially：When website has data to need to send, if detecting letter
Road hurries, then from 0 to OFDMA competition windows select a random number N, and continue detect channel and
Successively decreased according to the interval of each resource block distributed, if detecting channel busy again, N
It is constant, if detecting the channel spare time, N-1, as N=0, if detecting the channel spare time again, send out
Data are sent, if detecting channel busy again, reselect a random number, and perform again above-mentioned
Process.Wherein, each resource block at intervals of X μ s, for example X=5.
Step S12, the notification message frame is sent to described access point.
In the technical scheme, website is by generating notification message frame, the resource block that will be randomly selected
Information is notified to access point so that access point can be according to the notification message frame that multiple websites are sent come really
Whether the resource block information that fixed multiple websites are chosen clashes, and then can be it is determined that clashing
When, the collision avoidance mechanism (as redistributed resource block for multiple websites) of correlation is taken, is avoided
Multiple websites take OFDMA Back-off mechanism to choose to same resource block and to follow-up communication
The problem of bringing conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
In one embodiment of the invention, the communication means of described WLAN, in addition to：
Described access point is received it is determined that the resource that the resource block information that the website is chosen is chosen with other websites
Deallocated resources block message when block message clashes；Believed according to the deallocated resources block
Breath sends uplink data frames.
In this embodiment, by receiving access point deallocated resources block message so that in website
When the resource block information that the resource block information of selection is chosen with other websites clashes, it can use and connect
Access point deallocated resources block message sends uplink data frames, avoids between other websites
Communication produces conflict.
In one embodiment of the invention, before step S10, in addition to：Receive the access
The communication resource distribution message frame that point is sent, the communication resource distribution message frame are used to indicate to website
Resource block information to be chosen；Generation carries out the random number of the OFDMA Back-off mechanism, root
The resource of the progress uplink is selected in the resource block information for treating selection according to the random number
Block message.
Wherein, selected to carry out the resource of uplink in the resource block information for treat selection according to random number
The process of block message is specially：After random number N is chosen, channel status is detected and according to each point
The interval of the resource block prepared is successively decreased, if detecting channel busy, N is constant, if detecting
Channel is not busy, then N-1, as N=0, if detecting the channel spare time again, is treating the resource block of selection
Selection carries out the resource block information of uplink in information, if detecting channel busy again, gives birth to again
Into a random number, and said process is performed again.Wherein, each resource block at intervals of X μ s,
It is for example X=5us.
Wherein, the executive agent of the communication means shown in Fig. 1 can be mobile phone or PDA
(Personal Digital Assistant, palm PC) etc..
Fig. 2 shows showing for the communicator of WLAN according to first embodiment of the invention
Meaning block diagram.
As shown in Fig. 2 the communicator of WLAN according to first embodiment of the invention
200, including：Generation unit 202 and transmitting element 204.
Wherein, generation unit 202 is used to generate notification message frame, includes in the notification message frame
Website is up by the carry out selected in OFDMA competing cycles of OFDMA Back-off mechanism
The resource block information of transmission, the notification message frame are used for access point and determine the resource that the website is chosen
Whether the resource block information that block message is chosen with other websites clashes；Transmitting element 204 be used for
Described access point sends the notification message frame.
In specific implementation, generation unit 202 can be signal processor, central processing unit or base band
Processor etc.；Transmitting element 204 can be transmitter or antenna etc..
In the technical scheme, website is by generating notification message frame, the resource block that will be randomly selected
Information is notified to access point so that access point can be according to the notification message frame that multiple websites are sent come really
Whether the resource block information that fixed multiple websites are chosen clashes, and then can be it is determined that clashing
When, the collision avoidance mechanism (as redistributed resource block for multiple websites) of correlation is taken, is avoided
Multiple websites take OFDMA Back-off mechanism to choose to same resource block and to follow-up communication
The problem of bringing conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
Wherein, OFDMA Back-off mechanism is mainly that website is receiving the triggering of access point transmission
The random access procedure initiated after frame, it is specially：When website has data to need to send, if detecting letter
Road hurries, then from 0 to OFDMA competition windows select a random number N, and continue detect channel and
Successively decreased according to the interval of each resource block distributed, if detecting channel busy again, N
It is constant, if detecting the channel spare time, N-1, as N=0, if detecting the channel spare time again, send out
Data are sent, if detecting channel busy again, reselect a random number, and perform again above-mentioned
Process.
In the above-mentioned technical solutions, it is preferable that the communicator 200 of described WLAN, also
Including：First receiving unit 206.
Wherein, first receiving unit 206 is used to receive described access point it is determined that the website selects
The deallocated resources when resource block information that the resource block information taken is chosen with other websites clashes
Block message；The transmitting element 204 is additionally operable to, and is sent according to the deallocated resources block message
Uplink data frames.
In specific implementation, the first receiving unit 206 can be receiver or antenna etc..
In the technical scheme, by receiving access point deallocated resources block message so that standing
When the resource block information that the resource block information that point is chosen is chosen with other websites clashes, it can use
Access point deallocated resources block message sends uplink data frames, avoids between other websites
Communication produce conflict.
In any of the above-described technical scheme, it is preferable that also include：Second receiving unit 208 and processing
Unit 210.
Wherein, the second receiving unit 208 disappears for receiving the communication resource distribution of described access point transmission
Frame is ceased, the communication resource distribution message frame is used to indicate resource block information to be chosen to website；Place
Manage unit 210 to be used to generate the random number for carrying out the OFDMA Back-off mechanism, according to described
Random number selects the resource block letter of the progress uplink in the resource block information for treating selection
Breath.
In specific implementation, the second receiving unit 208 can be receiver or antenna etc.；Processing unit
210 can be central processing unit or BBP etc..
Wherein, selected to carry out the resource of uplink in the resource block information for treat selection according to random number
The process of block message is specially：After random number N is chosen, channel status is detected and according to each point
The interval of the resource block prepared is successively decreased, if detecting channel busy, N is constant, if detecting
Channel is not busy, then N-1, as N=0, if detecting the channel spare time again, is treating the resource block of selection
Selection carries out the resource block information of uplink in information, if detecting channel busy again, gives birth to again
Into a random number, and said process is performed again.
Fig. 3 shows the schematic block diagram of website according to an embodiment of the invention.
As shown in figure 3, website 300 according to an embodiment of the invention, including：As shown in Figure 2
WLAN communicator 200.
Fig. 4 shows showing for the communication means of the WLAN of second embodiment according to the present invention
Meaning flow chart.
As shown in figure 4, according to the present invention second embodiment WLAN communication means,
Including：
Step S40, the notification message frame that receiving station is sent, comprising in the notification message frame
Website is stated to carry out by the way that OFDMA Back-off mechanism is selected in OFDMA competing cycles
The resource block information of row transmission.
Step S42, the notification message frame sent according to multiple websites, determines the multiple website
Whether the resource block information of selection clashes.
Step S44, when it is determined that the resource block information that the multiple website is chosen clashes, to institute
State multiple websites and redistribute the resource block information for carrying out uplink, and notify to the multiple station
Point.
In the technical scheme, pass through the notification message frame of receiving station transmission, enabling according to more
The notification message frame that individual website is sent determines whether the resource block information that multiple websites are chosen clashes,
And then it can redistribute resource block information when it is determined that clashing to multiple websites, avoid more
Individual website takes OFDMA Back-off mechanism to choose to same resource block and to follow-up communication band
The problem of to conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
For example：When STA1 and STA2 have chosen resource block 1, AP determine STA1 and
STA2 subsequent communications can clash, and then resource block 1 can be distributed into STA1, by it
Remaining resource block, as resource block 2 distributes to STA2.
Wherein, when multiple websites choose identical resource block, AP can be built according to website and AP
The AID that AP is distributed size redistributes resource block during vertical association.Such as：As STA1 and
When STA2 have chosen resource block 1, if the AID that STA1 AID is 7, STA2 is 99,
So AP can first obtain the principle of resource block according to website larger AID, and resource block 1 is distributed
To STA2, the surplus resources block not being selected then is distributed into STA1.It is of course also possible to
The principle of resource block is first obtained according to the less websites of AID to distribute resource block to website.
Further, deallocated resources block can associated the process of foundation by AP with STAs
In assigned AID bind together to be reassigned to and choose same resource block and cause the meeting that communicates
The STAs clashed.
In one embodiment of the invention, before step S40, in addition to：Generate the communication resource
Assignment messages frame, the communication resource distribution message frame are used to indicate that resource block to be chosen is believed to website
Breath；Send the communication resource distribution message frame.
In the technical scheme, the resource block information to be chosen that is indicated in communication resource distribution message frame
Choose the resource block for carrying out uplink wherein by OFDMA Back-off mechanism for website.
Wherein, the executive agent of the communication means shown in Fig. 4 can be router etc..
Fig. 5 shows showing for the communicator of the WLAN of second embodiment according to the present invention
Meaning block diagram.
As shown in figure 5, the communicator according to the WLAN of second embodiment of the present invention
500, including：Receiving unit 502, determining unit 504, allocation unit 506 and notification unit
508。
Wherein, receiving unit 502 is used for the notification message frame that receiving station is sent, the notification message
Include in frame the website by OFDMA Back-off mechanism the institute in OFDMA competing cycles
The resource block information of the progress uplink of selection；Determining unit 504 is used to be sent according to multiple websites
The notification message frame, determine whether the resource block information that the multiple website is chosen clashes；
Allocation unit 506 is used to determine that the resource block that the multiple website is chosen is believed in the determining unit 504
When breath clashes, the resource block information for carrying out uplink is redistributed to the multiple website；It is logical
Know that unit 508 is used to notify the deallocated resources block message of allocation unit 506 to described more
Individual website.
In specific implementation, receiving unit 502 can be receiver or antenna etc.；Determining unit 504
Can be central processing unit or BBP etc. with allocation unit 506；Notification unit 508 can be
Transmitter or antenna etc..
In the technical scheme, pass through the notification message frame of receiving station transmission, enabling according to more
The notification message frame that individual website is sent determines whether the resource block information that multiple websites are chosen clashes,
And then it can redistribute resource block information when it is determined that clashing to multiple websites, avoid more
Individual website takes OFDMA Back-off mechanism to choose to same resource block and to follow-up communication band
The problem of to conflict, it is ensured that OFDMA technologies are applied in 802.11ax, meet
802.11ax communication requirement, region handling capacity is improved indirectly.
For example：When STA1 and STA2 have chosen resource block 1, AP determine STA1 and
STA2 subsequent communications can clash, and then resource block 1 can be distributed into STA1, by it
Remaining resource block, as resource block 2 distributes to STA2.
Wherein, when multiple websites choose identical resource block, AP can be built according to website and AP
The AID that AP is distributed size redistributes resource block during vertical association.Such as：As STA1 and
When STA2 have chosen resource block 1, if the AID that STA1 AID is 7, STA2 is 99,
So AP can first obtain the principle of resource block according to website larger AID, and resource block 1 is distributed
To STA2, the surplus resources block not being selected then is distributed into STA1.It is of course also possible to
The principle of resource block is first obtained according to the less websites of AID to distribute resource block to website.
Further, deallocated resources block can associated the process of foundation by AP with STAs
In assigned AID bind together to be reassigned to and choose same resource block and cause the meeting that communicates
The STAs clashed.
In the above-mentioned technical solutions, it is preferable that also include：Generation unit 510 and transmitting element
512。
Wherein, generation unit 510 is used to disappear in the notice that the receiving station of receiving unit 502 is sent
Before ceasing frame, communication resource distribution message frame is generated, the communication resource distribution message frame is used for station
Point indicates resource block information to be chosen；Transmitting element 512 disappears for sending the communication resource distribution
Cease frame.
In specific implementation, generation unit 510 can be signal processor, central processing unit or base band
Processor etc.；Transmitting element 512 can be transmitter or antenna etc..
In the technical scheme, the resource block information to be chosen that is indicated in communication resource distribution message frame
Choose the resource block for carrying out uplink wherein by OFDMA Back-off mechanism for website.
Fig. 6 shows the schematic block diagram of website according to an embodiment of the invention.
As shown in fig. 6, access point 600 according to an embodiment of the invention, including：Such as institute in Fig. 5
The communicator 500 of the WLAN shown.
In summary, technical scheme is primarily to avoid multiple websites from taking OFDMA
The selection of Back-off mechanism gives the problem of follow-up communication band is to conflict to same resource block.Specifically
Comprise the following steps：
Step 1：Website reports after RU (Resource Unit, resource unit) is chosen
AP。
Wherein, different websites is possible to produce same random number, and then is possible to choose equally
RU, then follow-up communication band can be given to conflict.In order to solve this conflict, website have chosen RU
Afterwards, RU information of the definition mechanism notice AP selected by it is answered.
Step 2：AP carries out collision avoidance mechanism by judging.
Whether the RU information that AP reports according to website, judging the RU of different website selections can produce
Communication contention aware, if communication contention aware can be produced, AP causes the station of communication contention aware to the RU of selection
Point redistributes RU.
Specifically, as shown in fig. 7, STA1, STA2 and STA3 are carrying out OFDMA
During Back-off (abbreviation OBO) mechanism, STA3 is competed successfully, selects RU3 to carry out up biography
Defeated, such case can't interfere to STA1 and STA2 subsequent communications.And such as Fig. 8 institutes
Show, STA1 and STA2 have selected identical random number when carrying out OBO mechanism, and then may be all
RU1 can be selected to carry out uplink, subsequent communications can now be interfered.Based on the present invention's
Technical scheme, each STA report AP after RU is selected, when AP judges STA selections
RU when can cause Communication Jamming, STA distribution RU can be given again.Specifically, AP is again
When distributing RU, the principle that RU can be first obtained according to website larger AID is allocated, such as
The AID that STA1 AID is 7, STA2 is 99, then RU1 is distributed to STA2 by AP,
And STA1 will be distributed to without the remaining RU being selected.Can certainly be smaller according to AID
Website first obtain RU principle and be allocated.
In addition, before website chooses RU, AP can broadcast resource to be chosen by trigger frame
Block message supplies the website to be selected.
Technical scheme is described in detail above in association with accompanying drawing, and the present invention proposes a kind of new
The communication plan of WLAN, multiple websites can be avoided to take OFDMA Back-off mechanism to select
Get same resource block and to follow-up communication band to conflict the problem of, it is ensured that OFDMA technologies
It is applied in 802.11ax, meets 802.11ax communication requirement.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for
For those skilled in the art, the present invention can have various modifications and variations.All essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the present invention with principle
Protection domain within.
Claims (12)
- A kind of 1. communication means of WLAN, it is characterised in that including：Notification message frame is generated, including website in the notification message frame passes through OFDMA Back- The resource block information of off mechanism progress uplink selected in OFDMA competing cycles, institute State notification message frame and be used for resource block information and the selection of other websites that access point determines the website selection Resource block information whether clash；The notification message frame is sent to described access point.
- 2. the communication means of WLAN according to claim 1, it is characterised in that also Including：Described access point is received it is determined that what the resource block information that the website is chosen was chosen with other websites Deallocated resources block message when resource block information clashes；Uplink data frames are sent according to the deallocated resources block message.
- 3. the communication means of WLAN according to claim 1 or 2, its feature exists In, before the step of generation notification message frame, in addition to：Receive the communication resource distribution message frame that described access point is sent, the communication resource distribution message Frame is used to indicate resource block information to be chosen to website；Generation carries out the random number of the OFDMA Back-off mechanism, according to the random number in institute State the resource block information that the progress uplink is selected in the resource block information for treat selection.
- A kind of 4. communication means of WLAN, it is characterised in that including：The notification message frame that receiving station is sent, include the website in the notification message frame and pass through The money of OFDMA Back-off mechanism progress uplink selected in OFDMA competing cycles Source block information；The notification message frame sent according to multiple websites, determine the resource that the multiple website is chosen Whether block message clashes；When it is determined that the resource block information that the multiple website is chosen clashes, to the multiple website The resource block information for carrying out uplink is redistributed, and is notified to the multiple website.
- 5. the communication means of WLAN according to claim 4, it is characterised in that Before the step of notification message frame that the receiving station is sent, in addition to：Communication resource distribution message frame is generated, the communication resource distribution message frame is used to indicate to website Resource block information to be chosen；Send the communication resource distribution message frame.
- A kind of 6. communicator of WLAN, it is characterised in that including：Generation unit, include website for generating notification message frame, in the notification message frame and pass through The money of OFDMA Back-off mechanism progress uplink selected in OFDMA competing cycles Source block information, the notification message frame be used for resource block information that access point determines that the website chooses with Whether the resource block information that other websites are chosen clashes；Transmitting element, for sending the notification message frame to described access point.
- 7. the communicator of WLAN according to claim 6, it is characterised in that also Including：First receiving unit, for receiving described access point it is determined that the resource block that the website is chosen Deallocated resources block message when the resource block information that information is chosen with other websites clashes；The transmitting element is additionally operable to, and upstream data is sent according to the deallocated resources block message Frame.
- 8. the communicator of the WLAN according to claim 6 or 7, its feature exists In, in addition to：Second receiving unit, for receiving the communication resource distribution message frame of described access point transmission, institute Communication resource distribution message frame is stated to be used to indicate resource block information to be chosen to website；Processing unit, the random number of the OFDMA Back-off mechanism is carried out for generating, according to The random number selects the resource block of the progress uplink in the resource block information for treating selection Information.
- A kind of 9. communicator of WLAN, it is characterised in that including：Receiving unit, for the notification message frame of receiving station transmission, included in the notification message frame There is the website to enter by the way that OFDMA Back-off mechanism is selected in OFDMA competing cycles The resource block information of row uplink；Determining unit, for the notification message frame sent according to multiple websites, determine the multiple Whether the resource block information that website is chosen clashes；Allocation unit, for determining the resource block information of the multiple website selection in the determining unit When clashing, the resource block information for carrying out uplink is redistributed to the multiple website；Notification unit, for the allocation unit deallocated resources block message to be notified to described more Individual website.
- 10. the communicator of WLAN according to claim 9, it is characterised in that also Including：Generation unit, it is raw for before the notification message frame that is sent in the receiving unit receiving station Into communication resource distribution message frame, the communication resource distribution message frame is used to indicate to wait to choose to website Resource block information；Transmitting element, for sending the communication resource distribution message frame.
- A kind of 11. website, it is characterised in that including：As any one of claim 6 to 8 WLAN communicator.
- A kind of 12. access point, it is characterised in that including：Nothing as described in claim 9 or 10 The communicator of line LAN.
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