CN107645781A - 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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- CN107645781A CN107645781A CN201610581041.3A CN201610581041A CN107645781A CN 107645781 A CN107645781 A CN 107645781A CN 201610581041 A CN201610581041 A CN 201610581041A CN 107645781 A CN107645781 A CN 107645781A
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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：Message frame is generated, ability label is included in the message frame, the ability label is used to represent that website supports HEW functions, and represents that access point can send the downlink data of caching by OFDMA technologies；The message frame is sent to access point.The website that technical scheme to support HEW functions is when being linked into the Basic Service Set for supporting HEW functions, by OFDMA technologies can cache the transmission of downlink data between access point and website, the utilization ratio of frequency spectrum is effectively increased, meets 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 is the handling capacity for improving existing Wi-Fi technology, and improves frequency
The effective utilization ratio and service quality QoS (Quality of Service) of spectrum, and realize than existing
Some Wi-Fi technologies adapt to the communication environment of more crypto set.
In existing Wi-Fi standards, website passes through TIM (Traffic Indication Map, business
Configured information) mechanism reception down buffer storage data, be specially：(Power Saving, saved in PS
Electricity) website under state determines AP by receiving the TIM message in Beacon (beacon) frame
Whether (Access Point, access point) has the downlink data of caching, if so, then website is in CP
PS-Poll (power savings are sent by way of competition during (Contention Period, competing cycle)
Training in rotation frame) obtain downlink data to AP, and CFP (Contention-free Period, it is non-
Competing cycle) in period, website is constantly in Awake states, until receiving downlink data.
Wherein, as shown in figure 1, it is all logical that website sends PS-Poll and AP to send data to website to AP
Cross what the mode of unicast was carried out.
Due to OFDMA (Orthogonal Frequency Division will be used in 802.11ax
Multiple Access, OFDM) technology improves the utilization ratio of frequency spectrum.Therefore, phase
Proposed in the technology of pass for the website for supporting HEW functions, access point can use
OFDMA technologies send the downlink data of caching to multiple websites simultaneously by way of multicast.Specifically
As shown in Fig. 2 access point sends MU-RTS (Multi-User Request to Send, multi-user
Request is sent) frame, after website feeds back CTS (Clear to Send, it is allowed to send) frame, connect
Access point sends downlink data by way of multicast.
The problem of in view of backward compatibility, supporting the website of HEW functions may be linked into
802.11ac/n/g/b/a BSS (Basis Service Set, Basic Service Set), and support
The website of HEW functions may also switch to from 802.11ac/n/g/b/a BSS supports HEW functions
BSS.For the website for supporting HEW functions, as the BSS for never supporting HEW functions
It is switched to the BSS for supporting HEW functions or is not supported from supporting the BSS of HEW functions to be switched to
During the BSS of HEW functions, the downlink data for how receiving access point cache should clear stipulaties.
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 so that support HEW functions website be linked into support HEW functions it is basic
When in services set, it can carry out caching lower line number by OFDMA technologies between access point and website
According to transmission, effectively increase the utilization ratio of frequency spectrum, 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：Message frame is generated, ability label is included in the message frame, the ability label is used
HEW functions are supported in expression website, and it is slow to represent that access point can be sent by OFDMA technologies
The downlink data deposited；The message frame is sent to access point.
In the technical scheme, the website of HEW functions is supported to include ability label by generation
Message frame so that access point, can be according to the energy included in the message frame when receiving the message frame
Power mark determines the ability of website, and then when access point also supports HEW functions, access point can be with
Send the lower line number of caching simultaneously to the website of multiple support HEW functions by OFDMA technologies
According to, it is ensured that OFDMA technologies are rationally applied in the transmitting procedure of caching downlink data, are had
Effect improves the utilization ratio of frequency spectrum, meets 802.11ax communication requirement；And do not propped up in access point
When holding HEW functions, access point then can send the descending of caching by the way of unicast to website
Data, it ensure that caching downlink data can normally be sent.It can be seen that technical scheme causes
The website of HEW functions is supported never to support the BSS of HEW functions to be switched to support HEW work(
When in the BSS of energy, access point can be by OFDMA technologies come the downlink data of transmission buffer；
When supporting the websites of HEW functions from supporting the BSS of HEW functions to be switched to and do not support HEW
When in the BSS of function, access point can send caching by original TIM mechanism to website
Downlink data.
Wherein, the website of HEW functions is supported to receive the downlink data for the caching that access point is sent
When, it is the interior progress during CP.Support HEW functions namely support OFDMA technologies.
In the above-mentioned technical solutions, it is preferable that the communication means of described WLAN, also wrap
Include：When accessing in any Basic Service Set, determine whether any Basic Service Set is supported
HEW functions.
In the technical scheme, website is when accessing any Basic Service Set, by determining that this takes substantially
Whether business collection supports HEW functions so that the access point that website can be concentrated clearly with the basic service
Using which kind of communication mechanism.Specifically, when Basic Service Set supports HEW functions, website is with connecing
Using OFDMA technologies cache the transmission of downlink data between access point, when Basic Service Set does not prop up
When holding HEW functions, using TIM mechanism cache the biography of downlink data between access point and website
It is defeated.
In any of the above-described technical scheme, it is preferable that include information element name in the message frame
Field, the ability label are the value of described information element name field.For example, the information element name
The value for claiming field can be 133.
In any of the above-described technical scheme, it is preferable that the message frame is that probe request or association please
Seek frame.
According to the second aspect of the invention, it is also proposed that a kind of communication means of WLAN, bag
Include：The message frame that receiving station is sent, include ability label, the ability mark in the message frame
Know for representing that website supports HEW functions, and represent that access point can be sent out by OFDMA technologies
Send the downlink data of caching；When access point supports HEW functions, by OFDMA technologies to branch
Hold multiple websites of HEW functions while send the downlink data of caching.
In the technical scheme, the message for including ability label that access point is sent by receiving station
Frame so that the ability of website can be determined according to the ability label included in the message frame, and then is being connect
When access point also supports HEW functions, access point can be by OFDMA technologies come to multiple supports
The website of HEW functions sends the downlink data of caching simultaneously, it is ensured that OFDMA technologies are caching
Rationally applied in the transmitting procedure of downlink data, effectively increase the utilization ratio of frequency spectrum, met
802.11ax communication requirement.
Wherein, the access point of HEW functions is supported to be sent in multiple websites to support HEW functions
It is the interior progress during CP during the downlink data of caching.
In addition, when access point does not support HEW functions, access point then can be by the way of unicast
To send the downlink data of caching to website, ensure that caching downlink data can normally be sent.
It can be seen that technical scheme to support the website of HEW functions never supporting
When the BSS of HEW functions is switched in the BSS for supporting HEW functions, access point can pass through
OFDMA technologies carry out the downlink data of transmission buffer；When supporting the website of HEW functions from support
When the BSS of HEW functions is switched in the BSS for not supporting HEW functions, access point can pass through
Original TIM mechanism to send the downlink data of caching to 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, for generating message frame, ability label, the energy are included in the message frame
Power is identified for representing that website supports HEW functions, and represents that access point can pass through OFDMA technologies
To send the downlink data of caching；Transmitting element, for sending the message frame to access point.
In the technical scheme, the website of HEW functions is supported to include ability label by generation
Message frame so that access point, can be according to the energy included in the message frame when receiving the message frame
Power mark determines the ability of website, and then when access point also supports HEW functions, access point can be with
Send the lower line number of caching simultaneously to the website of multiple support HEW functions by OFDMA technologies
According to, it is ensured that OFDMA technologies are rationally applied in the transmitting procedure of caching downlink data, are had
Effect improves the utilization ratio of frequency spectrum, meets 802.11ax communication requirement；And do not propped up in access point
When holding HEW functions, access point then can send the descending of caching by the way of unicast to website
Data, it ensure that caching downlink data can normally be sent.It can be seen that technical scheme causes
The website of HEW functions is supported never to support the BSS of HEW functions to be switched to support HEW work(
When in the BSS of energy, access point can be by OFDMA technologies come the downlink data of transmission buffer；
When supporting the websites of HEW functions from supporting the BSS of HEW functions to be switched to and do not support HEW
When in the BSS of function, access point can send caching by original TIM mechanism to website
Downlink data.
Wherein, the website of HEW functions is supported to receive the downlink data for the caching that access point is sent
When, it is the interior progress during CP.
In the above-mentioned technical solutions, it is preferable that the communicator of described WLAN, also wrap
Include：Determining unit, for when the website is accessed in any Basic Service Set, determining described any
Whether Basic Service Set supports HEW functions.
In the technical scheme, website is when accessing any Basic Service Set, by determining that this takes substantially
Whether business collection supports HEW functions so that the access point that website can be concentrated clearly with the basic service
Using which kind of communication mechanism.Specifically, when Basic Service Set supports HEW functions, website is with connecing
Using OFDMA technologies cache the transmission of downlink data between access point, when Basic Service Set does not prop up
When holding HEW functions, using TIM mechanism cache the biography of downlink data between access point and website
It is defeated.
In any of the above-described technical scheme, it is preferable that include information element name in the message frame
Field, the ability label are the value of described information element name field.For example, the information element name
The value for claiming field can be 133.
In any of the above-described technical scheme, it is preferable that the message frame is that probe request or association please
Seek frame.
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 message frame of receiving station transmission, mark of having the ability is included in the message frame
Know, the ability label is used to represent that website supports HEW functions, and represents that access point can pass through
OFDMA technologies send the downlink data of caching；Transmitting element, for being supported in access point
During HEW functions, sent simultaneously by multiple websites of OFDMA technologies to support HEW functions
The downlink data of caching.
In the technical scheme, the message for including ability label that access point is sent by receiving station
Frame so that the ability of website can be determined according to the ability label included in the message frame, and then is being connect
When access point also supports HEW functions, access point can be by OFDMA technologies come to multiple supports
The website of HEW functions sends the downlink data of caching simultaneously, it is ensured that OFDMA technologies are caching
Rationally applied in the transmitting procedure of downlink data, effectively increase the utilization ratio of frequency spectrum, met
802.11ax communication requirement.
Wherein, the access point of HEW functions is supported to be sent in multiple websites to support HEW functions
It is the interior progress during CP during the downlink data of caching.
In addition, when access point does not support HEW functions, access point then can be by the way of unicast
To send the downlink data of caching to website, ensure that caching downlink data can normally be sent.
It can be seen that technical scheme to support the website of HEW functions never supporting
When the BSS of HEW functions is switched in the BSS for supporting HEW functions, access point can pass through
OFDMA technologies carry out the downlink data of transmission buffer；When supporting the website of HEW functions from support
When the BSS of HEW functions is switched in the BSS for not supporting HEW functions, access point can pass through
Original TIM mechanism to send the downlink data of caching to 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.
Pass through above technical scheme so that support the website of HEW functions being linked into support HEW
When in the Basic Service Set of function, it can be carried out between access point and website by OFDMA technologies
The transmission of downlink data is cached, effectively increases the utilization ratio of frequency spectrum, meets the logical of 802.11ax
Letter demand.
Brief description of the drawings
Fig. 1 shows that AP carries out caching downlink data with website by way of unicast in correlation technique
The schematic diagram of transmission；
Fig. 2 shows that AP carries out caching lower line number with website by OFDMA technologies in correlation technique
According to the schematic diagram of transmission；
Fig. 3 shows showing for the communication means of WLAN according to first embodiment of the invention
Meaning flow chart；
Fig. 4 shows showing for the communicator of WLAN according to first embodiment of the invention
Meaning block diagram；
Fig. 5 shows the schematic block diagram of website according to an embodiment of the invention；
Fig. 6 shows showing for the communication means of the WLAN of second embodiment according to the present invention
Meaning flow chart；
Fig. 7 shows showing for the communicator of the WLAN of second embodiment according to the present invention
Meaning block diagram；
Fig. 8 shows the schematic block diagram of access point according to an embodiment of the invention；
Fig. 9 shows that the ability value of the website of support HEW functions according to an embodiment of the invention leads to
Cross the schematic diagram that IE form is indicated.
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. 3 shows showing for the communication means of WLAN according to first embodiment of the invention
Meaning flow chart.
As shown in figure 3, the communication means of WLAN according to first embodiment of the invention,
Including：
Step S30, message frame is generated, includes ability label, the ability mark in the message frame
Know for representing that website supports HEW functions, and represent that access point can be sent out by OFDMA technologies
Send the downlink data of caching.
Wherein, the message frame is probe request or association request frame.
Step S32, the message frame is sent to access point.
In the technical scheme, the website of HEW functions is supported to include ability label by generation
Message frame so that access point, can be according to the energy included in the message frame when receiving the message frame
Power mark determines the ability of website, and then when access point also supports HEW functions, access point can be with
Send the lower line number of caching simultaneously to the website of multiple support HEW functions by OFDMA technologies
According to, it is ensured that OFDMA technologies are rationally applied in the transmitting procedure of caching downlink data, are had
Effect improves the utilization ratio of frequency spectrum, meets 802.11ax communication requirement；And do not propped up in access point
When holding HEW functions, access point then can send the descending of caching by the way of unicast to website
Data, it ensure that caching downlink data can normally be sent.It can be seen that technical scheme causes
The website of HEW functions is supported never to support the BSS of HEW functions to be switched to support HEW work(
When in the BSS of energy, access point can be by OFDMA technologies come the downlink data of transmission buffer；
When supporting the websites of HEW functions from supporting the BSS of HEW functions to be switched to and do not support HEW
When in the BSS of function, access point can send caching by original TIM mechanism to website
Downlink data.
Wherein, the website of OFDMA technologies is supported to receive the downlink data for the caching that access point is sent
When, it is interior during CP to receive.
In the above-mentioned technical solutions, it is preferable that the communication means of described WLAN, also wrap
Include：When accessing in any Basic Service Set, determine whether any Basic Service Set is supported
HEW functions.
In the technical scheme, website is when accessing any Basic Service Set, by determining that this takes substantially
Whether business collection supports HEW functions so that the access point that website can be concentrated clearly with the basic service
Using which kind of communication mechanism.Specifically, when Basic Service Set supports HEW functions, website is with connecing
Using OFDMA technologies cache the transmission of downlink data between access point, when Basic Service Set does not prop up
When holding HEW functions, using TIM mechanism cache the biography of downlink data between access point and website
It is defeated.
In any of the above-described technical scheme, it is preferable that include information element name in the message frame
Field, the ability label are the value of described information element name field.For example, the information element name
The value for claiming field can be 133.
The executive agent of communication means shown in Fig. 3 can be mobile phone or PDA (Personal
Digital Assistant, palm PC) etc..
Fig. 4 shows showing for the communicator of WLAN according to first embodiment of the invention
Meaning block diagram.
As shown in figure 4, the communicator of WLAN according to first embodiment of the invention
400, including：Generation unit 402 and transmitting element 404.
Wherein, generation unit 402 is used to generate message frame, and mark of having the ability is included in the message frame
Know, the ability label is used to represent that website supports HEW functions, and represents that access point can pass through
OFDMA technologies send the downlink data of caching；Transmitting element 404 is used to send institute to access point
State message frame.
In specific implementation, generation unit 402 can be signal processor, central processing unit or base band
Processor etc.；Transmitting element 404 can be transmitter or antenna etc..
In the technical scheme, the website of HEW functions is supported to include ability label by generation
Message frame so that access point, can be according to the energy included in the message frame when receiving the message frame
Power mark determines the ability of website, and then when access point also supports HEW functions, access point can be with
Send the lower line number of caching simultaneously to the website of multiple support HEW functions by OFDMA technologies
According to, it is ensured that OFDMA technologies are rationally applied in the transmitting procedure of caching downlink data, are had
Effect improves the utilization ratio of frequency spectrum, meets 802.11ax communication requirement；And do not propped up in access point
When holding HEW functions, access point then can send the descending of caching by the way of unicast to website
Data, it ensure that caching downlink data can normally be sent.It can be seen that technical scheme causes
The website of HEW functions is supported never to support the BSS of HEW functions to be switched to support HEW work(
When in the BSS of energy, access point can be by OFDMA technologies come the downlink data of transmission buffer；
When supporting the websites of HEW functions from supporting the BSS of HEW functions to be switched to and do not support HEW
When in the BSS of function, access point can send caching by original TIM mechanism to website
Downlink data.
Wherein, the website of OFDMA technologies is supported to receive the downlink data for the caching that access point is sent
When, it is the interior progress during CP.
In the above-mentioned technical solutions, it is preferable that the communicator 400 of described WLAN, also
Including：Determining unit 406, for when the website is accessed in any Basic Service Set, determining institute
State whether any Basic Service Set supports HEW functions.
In specific implementation, determining unit 406 can be central processing unit or BBP etc..
In the technical scheme, website is when accessing any Basic Service Set, by determining that this takes substantially
Whether business collection supports HEW functions so that the access point that website can be concentrated clearly with the basic service
Using which kind of communication mechanism.Specifically, when Basic Service Set supports HEW functions, website is with connecing
Using OFDMA technologies cache the transmission of downlink data between access point, when Basic Service Set does not prop up
When holding HEW functions, using TIM mechanism cache the biography of downlink data between access point and website
It is defeated.
In any of the above-described technical scheme, it is preferable that include information element name in the message frame
Field, the ability label are the value of described information element name field.For example, the information element name
The value for claiming field can be 133.
In any of the above-described technical scheme, it is preferable that the message frame is that probe request or association please
Seek frame.
Fig. 5 shows the schematic block diagram of website according to an embodiment of the invention.
As shown in figure 5, website 500 according to an embodiment of the invention, including：As shown in Figure 4
WLAN communicator 400.
Fig. 6 shows showing for the communication means of the WLAN of second embodiment according to the present invention
Meaning flow chart.
As shown in fig. 6, according to the present invention second embodiment WLAN communication means,
Including：
Step S60, the message frame that receiving station is sent, include ability label in the message frame,
The ability label is used to represent that website supports HEW functions, and represents that access point can pass through
OFDMA technologies send the downlink data of caching.
Step S62, when access point supports HEW functions, by OFDMA technologies to support
Multiple websites of HEW functions send the downlink data of caching simultaneously.
Wherein, the access point of HEW functions is supported to be sent in multiple websites to support HEW functions
It is the interior progress during CP during the downlink data of caching.
In the technical scheme, the message for including ability label that access point is sent by receiving station
Frame so that the ability of website can be determined according to the ability label included in the message frame, and then is being connect
When access point also supports HEW functions, access point can be by OFDMA technologies come to multiple supports
The website of HEW functions sends the downlink data of caching simultaneously, it is ensured that OFDMA technologies are caching
Rationally applied in the transmitting procedure of downlink data, effectively increase the utilization ratio of frequency spectrum, met
802.11ax communication requirement.
In addition, when access point does not support HEW functions, access point then can be by the way of unicast
To send the downlink data of caching to website, ensure that caching downlink data can normally be sent.
It can be seen that technical scheme to support the website of HEW functions never supporting
When the BSS of HEW functions is switched in the BSS for supporting HEW functions, access point can pass through
OFDMA technologies carry out the downlink data of transmission buffer；When supporting the website of HEW functions from support
When the BSS of HEW functions is switched in the BSS for not supporting HEW functions, access point can pass through
Original TIM mechanism to send the downlink data of caching to website.
Wherein, the executive agent of the communication means shown in Fig. 6 can be router etc..
Fig. 7 shows showing for the communicator of the WLAN of second embodiment according to the present invention
Meaning block diagram.
As shown in fig. 7, the communicator according to the WLAN of second embodiment of the present invention
700, including：Receiving unit 702 and transmitting element 704.
Wherein, receiving unit 702 is used for the message frame that receiving station is sent, and is included in the message frame
Have the ability to identify, the ability label is used to represent that website supports HEW functions, and represents access point
The downlink data of caching can be sent by OFDMA technologies；Transmitting element 704 is used in access point
Support HEW functions when, by OFDMA technologies to support HEW functions multiple websites simultaneously
Send the downlink data of caching.
In the technical scheme, the message for including ability label that access point is sent by receiving station
Frame so that the ability of website can be determined according to the ability label included in the message frame, and then is being connect
When access point also supports HEW functions, access point can be by OFDMA technologies come to multiple supports
The website of HEW functions sends the downlink data of caching simultaneously, it is ensured that OFDMA technologies are caching
Rationally applied in the transmitting procedure of downlink data, effectively increase the utilization ratio of frequency spectrum, met
802.11ax communication requirement.
Wherein, the access point of HEW functions is supported to be sent in multiple websites to support HEW functions
It is the interior progress during CP during the downlink data of caching.
In addition, when access point does not support HEW functions, access point then can be by the way of unicast
To send the downlink data of caching to website, ensure that caching downlink data can normally be sent.
It can be seen that technical scheme to support the website of HEW functions never supporting
When the BSS of HEW functions is switched in the BSS for supporting HEW functions, access point can pass through
OFDMA technologies carry out the downlink data of transmission buffer；When supporting the website of HEW functions from support
When the BSS of HEW functions is switched in the BSS for not supporting HEW functions, access point can pass through
Original TIM mechanism to send the downlink data of caching to website.
In specific implementation, receiving unit 702 can be receiver or antenna etc., transmitting element 704
Can be transmitter or antenna etc..
Fig. 8 shows the schematic block diagram of access point according to an embodiment of the invention.
As shown in figure 8, access point 800 according to an embodiment of the invention, including：Such as institute in Fig. 7
The communicator 700 of the WLAN shown.
In summary, the website for supporting HEW functions is mainly proposed in technical scheme
When receiving the downlink data frame of access point cache, it should there is dynamic handoff functionality, when being connected to
When not supporting the BSS of HEW functions, it supports existing TIM mechanism；When it is switched to support
During the BSS of HEW functions, it can be cached between access point by OFDMA mechanism
The transmission of downlink data.
It is specific as follows：
1st, support that it is to support to judge BSS to the website of HEW functions during BSS is linked into
The BSS of HEW functions does not still support the BSS of HEW functions.Meanwhile the website props up itself
The ability value for holding HEW functions is sent to AP.Specifically, website can by probe request or
Association request frame is supported the ability information value of HEW functions to send to AP.
Wherein, the ability value for supporting HEW functions can be IE (Information Element, letter
Cease element) form, its specific form is as shown in figure 9, wherein, Element ID can be
133, to represent that website supports HEW functions, the value in Information fields represents that website is supported
(how defeated Multiple-Input Multiple-Output, multi input be by OFDMA technologies, MU MIMO
Go out) and its can be with the mechanism of its order caching downlink data of dynamic change.
2nd, when supporting the BSS of website access of HEW functions also to support HEW functions, then connect
By OFDMA mechanism can cache the transmission of downlink data between access point and website.
Specifically, during CP, AP broadcasts TIM/DTIM information, and root within a beacon frame
According to needing order caching downlink data and support the quantity of website of OFDMA functions to come to these websites
It is grouped, and grouping information is broadcasted within a beacon frame.
Wherein, TIM/DTIM information is existed for multiple websites instruction to support OFDMA functions
The downlink data that access point has caching in the defined time needs to send.Specifically, configured information is worked as
For TIM information when, access point can by for support OFDMA functions website and do not support
The caching downlink data of OFDMA website separately indicates in time, for example access point is at first
Between put TIM information in the beacon frame of generation and be used to indicate in first time period to this multiple website
The downlink data that access point has caching needs to send, and in the beacon frame of the second time point generation
TIM information be used for do not support OFDMA functions website indicate in second time period access point have
The downlink data of caching needs to send；When configured information is DTIM information, access point can pass through
DTIM information is come to the multiple websites instruction access point within the defined time for supporting OFDMA functions
The downlink data for having caching needs to send.
And then AP sends MU-RTS frames, the resource block letter of AP distribution is included in MU-RTS frames
Breath, website are replied after MU-RTS frames are received to the resource block information distributed according to access point
CTS frames.After AP receives the CTS frames of station replies, the lower line number of caching is sent to website
According to, and then the resource block information that website is distributed by access point replys confirmation message frame to AP.
3rd, when supporting the BSS of website access of HEW functions not support HEW functions, then connect
By original TIM mechanism can cache the transmission of downlink data between access point and website.
Specifically：Website under PS states is determined by the TIM message in received beacon frame
Whether AP has the downlink data of caching, if so, then website during CP by way of competition
PS-Poll is sent to AP to obtain downlink data, and it is interior during CFP, and website is constantly in
Awake states, until receiving downlink data.
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 so that support the website of HEW functions being linked into support HEW
When in the Basic Service Set of function, it can be carried out between access point and website by OFDMA technologies
The transmission of downlink data is cached, effectively increases the utilization ratio of frequency spectrum, meets the logical of 802.11ax
Letter demand.
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：Message frame is generated, ability label is included in the message frame, the ability label is used to represent Website supports HEW functions, and represents that access point can be sent under caching by OFDMA technologies Row data；The message frame is sent to access point.
- 2. the communication means of WLAN according to claim 1, it is characterised in that also Including：When accessing in any Basic Service Set, determine whether any Basic Service Set is supported HEW functions.
- 3. the communication means of WLAN according to claim 1, it is characterised in that institute State and include information element name in message frame, the ability label is described information element term The value of field.
- 4. the communication means of WLAN according to any one of claim 1 to 3, its It is characterised by, the message frame is probe request or association request frame.
- A kind of 5. communication means of WLAN, it is characterised in that including：The message frame that receiving station is sent, include ability label, the ability mark in the message frame Know for representing that website supports HEW functions, and represent that access point can be sent out by OFDMA technologies Send the downlink data of caching；When access point supports HEW functions, by OFDMA technologies to supporting HEW functions Multiple websites send the downlink data of caching simultaneously.
- A kind of 6. communicator of WLAN, it is characterised in that including：Generation unit, for generating message frame, ability label, the energy are included in the message frame Power is identified for representing that website supports HEW functions, and represents that access point can pass through OFDMA technologies To send the downlink data of caching；Transmitting element, for sending the message frame to access point.
- 7. the communicator of WLAN according to claim 6, it is characterised in that also Including：Determining unit, for when the website is accessed in any Basic Service Set, determining described any Whether Basic Service Set supports HEW functions.
- 8. the communicator of WLAN according to claim 6, it is characterised in that institute State and include information element name in message frame, the ability label is described information element term The value of field.
- 9. the communicator of the WLAN according to any one of claim 6 to 8, its It is characterised by, the message frame is probe request or association request frame.
- A kind of 10. communicator of WLAN, it is characterised in that including：Receiving unit, for the message frame of receiving station transmission, mark of having the ability is included in the message frame Know, the ability label is used to represent that website supports HEW functions, and represents that access point can pass through OFDMA technologies send the downlink data of caching；Transmitting element, for when access point supports HEW functions, by OFDMA technologies to branch Hold multiple websites of HEW functions while send the downlink data of caching.
- A kind of 11. website, it is characterised in that including：As any one of claim 6 to 9 WLAN communicator.
- A kind of 12. access point, it is characterised in that including：Wireless office as claimed in claim 10 The communicator of domain net.
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