CN105873147B - Communication means, communication device, access point and the website of WLAN - Google Patents
Communication means, communication device, access point and the website of WLAN Download PDFInfo
- Publication number
- CN105873147B CN105873147B CN201610414409.7A CN201610414409A CN105873147B CN 105873147 B CN105873147 B CN 105873147B CN 201610414409 A CN201610414409 A CN 201610414409A CN 105873147 B CN105873147 B CN 105873147B
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- frame
- confirmation message
- website
- basic service
- access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention provides a kind of communication means of WLAN, communication device, access point and website, wherein, the communication means of WLAN includes: to generate confirmation message frame, the confirmation message frame is used to feed back the reception condition for the uplink data frames that access point sends the website that the first basic service is concentrated, it include indicating bit in the confirmation message frame, the indicating bit, which is used to indicate access point, can successively send CF-End frame and handover request frame after sending confirmation message frame, CF-End frame is used to indicate access point and transfer resource that the website that first basic service is concentrated distributes but not used is turned in release, handover request frame, which is used to indicate access point and will switch to the second basic service set, to be communicated；Send the confirmation message frame.One aspect of the present invention can be improved the utilization efficiency of frequency spectrum, on the other hand but also access point can notify the website in former BSS, and then the website in original BSS is able to enter dormant state to reduce power consumption when switching to other BSS and being communicated.
Description
Technical field
The present invention relates to fields of communication technology, wireless in particular to a kind of communication means of WLAN, one kind
The communication device of local area network, a kind of access point and a kind of website.
Background technique
Next-generation Wi-Fi (Wireless Fidelity, Wireless Fidelity) technology has been set up in May, 2013,802.11
Study group HEW (High efficiency WLAN, efficient WLAN), i.e. 802.11ax, main research point are to improve
The handling capacity of existing Wi-Fi technology, the effective use efficiency for improving frequency spectrum improve user experience and service quality Q oE
(Quality of Experience), and realize the communication environment that more crypto set is adapted to than existing Wi-Fi technology.
, it is specified that the AP of a physics (Access Point, access point) can in the formulation process of 802.11ax standard
It is communicated with fictionalizing multiple BSS (Basis Service Set, basic service set).
Meanwhile in order to make OFDMA (Orthogonal Frequency Division Multiple Access, orthogonal frequency
Point multiple access) technology is applied, a kind of new resource allocation message frame, referred to as trigger frame are defined in 802.11ax standard.Tool
Body, as shown in Figure 1, in a TXOP (Transmission Opportunity, transmission opportunity), when AP sends trigger frame
Afterwards, each website (STA1, STA2, STA3 and STA4) can send uplink data frames, and such as each website can send UL
(Uplink, uplink) MU (Multi-User, multi-user) PPDU (Physical Layer Convergence Procedure
(PLCP) Protocol Data Unit, physical layer convergence procedure protocol Data Unit), access point line number on receiving these
After frame, M-BA (Multi Block ACK, multi-user block confirmation) frame can be sent.After the completion of TXOP, AP may be switched to separately
One virtual BSS is communicated, at this point, if AP is switched over without notifying those to carry out upstream data in this TXOP
The website of transmission, then these websites can be in disordered state, to be associated with to lose out with AP, and then can trigger the following of these websites
Operation: 1, website frequently sends probe requests thereby (Probe Request) frame and AP is associated；2, website and other AP, which are established, closes
Connection.Obviously, above-mentioned two kinds operations are not desired operation, it is therefore desirable to propose corresponding solution.
Summary of the invention
The present invention is based at least one above-mentioned technical problem, proposes a kind of communication party of new WLAN
On the one hand case enables access point to discharge the extra transfer resource for turning website distribution, effectively increases the utilization of frequency spectrum
Efficiency, on the other hand but also access point can notify former basic service when switching to other basic service sets and being communicated
Website in collection, and then the website in former basic service set is able to enter dormant state to reduce power consumption.
In view of this, according to the first aspect of the invention, proposing a kind of communication means of WLAN, comprising: raw
At confirmation message frame, the confirmation message frame is used to feed back the upper line number that access point sends the website that the first basic service is concentrated
It include indicating bit in the confirmation message frame according to the reception condition of frame, the indicating bit is used to indicate access point and is sending institute
CF-End frame and handover request frame can be successively sent after stating confirmation message frame, the CF-End frame, which will be used to indicate access point, to be discharged
Transfer resource that the website that first basic service is concentrated distributes but not used is turned, the handover request frame is used to indicate
Access point will switch to the second basic service set and be communicated；Send the confirmation message frame.
In the technical scheme, by the way that indicating bit is arranged in confirmation message frame, to be sent to website instruction access point
CF-End frame and handover request frame can be successively sent after confirmation message frame, make it possible to notify access point can discharge to turn to website
The website distribution that first basic service is concentrated but not used transfer resource, i.e. access point, which can discharge, turns the first basic clothes
The extra transfer resource for the website distribution that business is concentrated, effectively increases the utilization efficiency of frequency spectrum.Meanwhile it also allowing for
The website notice access point that one basic service is concentrated can switch to the second basic service set and be communicated, and then the first basic service
The website of concentration can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
Wherein, the physical carrier entity of the first basic service set and the second basic service set is all the transmission of confirmation message frame
Section fictionalizes different basic service sets in different times by square AP, the AP, the basic clothes for example fictionalized in first time period
Business integrates as BSS1, is BSS2 in the basic service set that second time period fictionalizes.
In addition, in the technical scheme, the confirmation message frame is multiuser downstream confirmation message frame (M-BA), i.e., should
Confirmation message frame is directed to the reception condition for the uplink data frames feedback transmitted using multiple websites of OFDMA technology by AP.
In one embodiment of the invention, the transfer resource includes the bandwidth resources of access point distribution, website adopts
MCS (Modulation and Coding Scheme, modulation and coding strategy) parameter, the distribution information of wireless resource block
And spatial reuse information etc..
In the above-mentioned technical solutions, it is preferable that before the generation confirmation message frame the step of, further includes: generate logical
Believe resource allocation message frame, the website distribution that the communication resource distribution message frame is used to concentrate to first basic service passes
Defeated resource；The communication resource distribution message frame is sent, and receives the website that first basic service is concentrated and is led to according to described
Believe uplink data frames transmitted by the transfer resource of resource allocation message frame instruction；Judge the institute that first basic service is concentrated
Have whether the upstream data of website is all sent completely；In the upstream data for all websites for determining the first basic service concentration
When being all sent completely, execute the generation confirmation message frame the step of.
Specifically, when the website distribution transmission that access point is concentrated by communication resource distribution message frame to the first basic service
After resource, if the upstream data for all websites that the first basic service is concentrated all is sent completely, access point can be discharged
Remaining transfer resource, i.e., extended meeting sends the indicating bit of CF-End frame after being arranged in the confirmation message frame of generation, is connect with instruction
Access point can discharge remaining transfer resource.
In the above-mentioned technical solutions, it is preferable that judge the upstream data for all websites that first basic service is concentrated
The step of whether being all sent completely, specifically includes: obtaining each website hair in all websites that first basic service is concentrated
More Data field in MAC (Media Access Control, the media access control) frame head for the uplink data frames sent
Value；If the value of the More Data field in the mac frame head for the uplink data frames that all websites are sent is 0, it is determined that institute
The upstream data for stating all websites is all sent completely.
In any of the above-described technical solution, it is preferable that when indicated by the duration field in the confirmation message frame
Between length are as follows: the occupied time span of the confirmation message frame, SIFS (Short Inter-frame Space, between short interframe
Every) occupy 2 times of time span, the occupied time span of the CF-End frame and when the occupied handover request frame
Between length summation.
In the technical scheme, due to after sending confirmation message frame, needing to send CF-End frame after SIFS, and
Need to send handover request frame, therefore the duration field in confirmation message frame after sending CF-End frame after SIFS
Indicated time span are as follows: 2 times, CF-End of the time span that the occupied time span of confirmation message frame, SIFS are occupied
The summation of the occupied time span of frame and the occupied time span of handover request frame.
In any of the above-described technical solution, it is preferable that further include: generate the CF-End frame；Disappear sending the confirmation
After ceasing frame, and the CF-End frame is sent after SIFS.Wherein, CF-End frame sent after the confirmation message frame when
Between interval can be SIFS, be also possible to the duration longer than the interval SIFS.
In the technical scheme, by after sending confirmation message frame, and CF-End frame is sent after SIFS, so that connecing
The website notice access point that access point can be concentrated to the first basic service, which will discharge, turns the website that the first basic service is concentrated
The extra transfer resource of distribution, effectively increases the utilization efficiency of frequency spectrum.
In the above-mentioned technical solutions, it is preferable that due to needing to send switching after SIFS after sending CF-End frame
Message frame, therefore time span indicated by the duration field in CF-End frame are as follows: when the CF-End frame is occupied
Between length, SIFS occupy time span and the occupied time span of handover request frame summation.
In any of the above-described technical solution, it is preferable that further include: generate the handover request frame；Sending the CF-
After End frame, and the handover request frame is sent after SIFS.
In the technical scheme, by after sending CF-End frame, and handover request frame is sent after SIFS, make it possible to
Enough website notice access points concentrated to the first basic service can switch to the second basic service set and be communicated, and then the first base
Website in this services set can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
In the above-mentioned technical solutions, it is preferable that the time indicated by the duration field in the handover request frame is long
Degree is 0.
According to the second aspect of the invention, it is also proposed that a kind of communication means of WLAN, comprising: the first basic clothes
The website that business is concentrated receives confirmation message frame, and the confirmation message frame is for feeding back the upper line number that access point sends the website
It include indicating bit in the confirmation message frame according to the reception condition of frame, the indicating bit is used to indicate access point and is sending institute
CF-End frame and handover request frame can be successively sent after stating confirmation message frame, the CF-End frame, which will be used to indicate access point, to be discharged
Turn website distribution but not used transfer resource, the handover request frame, which is used to indicate access point, will switch to the
Two basic service sets are communicated；Successively receive the CF-End frame and the handover request frame；Disappear receiving the switching
When ceasing frame, into dormant state.
In the technical scheme, access point is used to indicate after sending confirmation message frame by being arranged in confirmation message frame
The indicating bit of CF-End frame and handover request frame, the website that access point is concentrated to the first basic service can successively be sent
Notice access point can discharge the website distribution for turning the first basic service concentration but not used transfer resource, i.e. access point energy
The extra transfer resource of the website distribution of the first basic service concentration is turned in enough release, and effectively increase frequency spectrum utilizes effect
Rate.Meanwhile but also website can detect handover request frame according to the indicating bit, to enter when detecting handover request frame
Dormant state effectively reduces the power consumption of the website of the first basic service concentration.
According to the third aspect of the invention we, it is also proposed that a kind of communication device of WLAN, comprising: generation unit,
For generating confirmation message frame, the confirmation message frame is used to feed back what access point sent the website that the first basic service is concentrated
The reception condition of uplink data frames includes indicating bit in the confirmation message frame, and the indicating bit is used to indicate access point and exists
CF-End frame and handover request frame can be successively sent after sending the confirmation message frame, the CF-End frame is used to indicate access point
The website distribution that first basic service is concentrated but not used transfer resource is turned into release, the handover request frame is used
The second basic service set will be switched in instruction access point to be communicated；Transmission unit, for sending the confirmation message frame.
In the technical scheme, by the way that indicating bit is arranged in confirmation message frame, to be sent to website instruction access point
CF-End frame and handover request frame can be successively sent after confirmation message frame, make it possible to notify access point can discharge to turn to website
The website distribution that first basic service is concentrated but not used transfer resource, i.e. access point, which can discharge, turns the first basic clothes
The extra transfer resource for the website distribution that business is concentrated, effectively increases the utilization efficiency of frequency spectrum.Meanwhile it also allowing for
The website notice access point that one basic service is concentrated can switch to the second basic service set and be communicated, and then the first basic service
The website of concentration can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
Wherein, the physical carrier entity of the first basic service set and the second basic service set is all the transmission of confirmation message frame
Section fictionalizes different basic service sets in different times by square AP, the AP, the basic clothes for example fictionalized in first time period
Business integrates as BSS1, is BSS2 in the basic service set that second time period fictionalizes.
In addition, in the technical scheme, the confirmation message frame is multiuser downstream confirmation message frame, i.e. the confirmation disappears
Breath frame is directed to the reception condition for the uplink data frames feedback transmitted using multiple websites of OFDMA technology by AP.
In one embodiment of the invention, the transfer resource includes the bandwidth resources of access point distribution, website adopts
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
In the above-mentioned technical solutions, it is preferable that the communication device of the WLAN, further includes: receiving unit and
Judging unit；Wherein, the generation unit is also used to, and before generating the confirmation message frame, is generated communication resource distribution and is disappeared
Frame is ceased, the communication resource distribution message frame is used for the website allocation of transmission resources concentrated to first basic service, is used in combination
When determining that the upstream data for all websites that first basic service is concentrated all is sent completely in the judging unit, generate
The confirmation message frame；The transmission unit is also used to, and sends the communication resource distribution message frame；The receiving unit is used for
The website of the first basic service concentration is received according to transmitted by the transfer resource that the communication resource distribution message frame indicates
Uplink data frames；Whether the upstream data for all websites that the judging unit is used to judge that first basic service is concentrated
All it is sent completely.
Specifically, when the website distribution transmission that access point is concentrated by communication resource distribution message frame to the first basic service
After resource, if the upstream data for all websites that the first basic service is concentrated all is sent completely, access point can be discharged
Remaining transfer resource, i.e., extended meeting sends the indicating bit of CF-End frame after being arranged in the confirmation message frame of generation, is connect with instruction
Access point can discharge remaining transfer resource.
In the above-mentioned technical solutions, it is preferable that the judging unit includes: acquiring unit, for obtaining first base
The value of More Data field in the mac frame head for the uplink data frames that each website is sent in all websites in this services set；
Determination unit, the value for the More Data field in the mac frame head for the uplink data frames that all websites are sent are
When 0, determine that the upstream data of all websites is all sent completely.
In any of the above-described technical solution, it is preferable that when indicated by the duration field in the confirmation message frame
Between length are as follows: 2 times, the CF-End frame of the time span that the occupied time span of the confirmation message frame, SIFS are occupied
The summation of occupied time span and the occupied time span of handover request frame.
In the technical scheme, due to after sending confirmation message frame, needing to send CF-End frame after SIFS, and
Need to send handover request frame, therefore the duration field in confirmation message frame after sending CF-End frame after SIFS
Indicated time span are as follows: 2 times, CF-End of the time span that the occupied time span of confirmation message frame, SIFS are occupied
The summation of the occupied time span of frame and the occupied time span of handover request frame.
In any of the above-described technical solution, it is preferable that the generation unit is also used to, and generates the CF-End frame；It is described
Transmission unit is also used to, and after sending the confirmation message frame, and the CF-End frame is sent after SIFS.Wherein, CF-
The time interval that End frame is sent after confirmation message frame can be SIFS, be also possible to the duration longer than the interval SIFS.
In the technical scheme, by after sending confirmation message frame, and CF-End frame is sent after SIFS, so that connecing
The website notice access point that access point can be concentrated to the first basic service, which will discharge, turns the website that the first basic service is concentrated
The extra transfer resource of distribution, effectively increases the utilization efficiency of frequency spectrum.
In the above-mentioned technical solutions, it is preferable that due to needing to send switching after SIFS after sending CF-End frame
Message frame, therefore time span indicated by the duration field in CF-End frame are as follows: when the CF-End frame is occupied
Between length, SIFS occupy time span and the occupied time span of handover request frame summation.
In any of the above-described technical solution, it is preferable that the generation unit is also used to, and generates the handover request frame；Institute
It states transmission unit to be also used to, after sending the CF-End frame, and sends the handover request frame after SIFS.
In the technical scheme, by after sending CF-End frame, and handover request frame is sent after SIFS, make it possible to
Enough website notice access points concentrated to the first basic service can switch to the second basic service set and be communicated, and then the first base
Website in this services set can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
In the above-mentioned technical solutions, it is preferable that the time indicated by the duration field in the handover request frame is long
Degree is 0.
According to the fourth aspect of the invention, it is also proposed that a kind of communication device of WLAN, comprising: receiving unit,
For receiving confirmation message frame, the confirmation message frame is used to feed back what access point sent the website that the first basic service is concentrated
The reception condition of uplink data frames includes indicating bit in the confirmation message frame, and the indicating bit is used to indicate access point and exists
CF-End frame and handover request frame can be successively sent after sending the confirmation message frame, the CF-End frame is used to indicate access point
The website distribution that first basic service is concentrated but not used transfer resource is turned into release, the handover request frame is used
It will switch to the second basic service set in instruction access point and be communicated, and for successively receiving the CF-End frame and described
Handover request frame；Processing unit, for when the receiving unit receives the handover request frame, into dormant state.
In the technical scheme, access point is used to indicate after sending confirmation message frame by being arranged in confirmation message frame
The indicating bit of CF-End frame and handover request frame, the website that access point is concentrated to the first basic service can successively be sent
Notice access point can discharge the website distribution for turning the first basic service concentration but not used transfer resource, i.e. access point energy
The extra transfer resource of the website distribution of the first basic service concentration is turned in enough release, and effectively increase frequency spectrum utilizes effect
Rate.Meanwhile but also website can detect handover request frame according to the indicating bit, to enter when detecting handover request frame
Dormant state effectively reduces the power consumption of the website of the first basic service concentration.
According to the fifth aspect of the invention, it is also proposed that a kind of access point, comprising: wireless as described in the above-mentioned third aspect
The communication device of local area network.
According to the sixth aspect of the invention, it is also proposed that a kind of website, comprising: the wireless office as described in above-mentioned fourth aspect
The communication device of domain net.
By above technical scheme, access point is not only enabled to discharge the extra transfer resource for turning website distribution,
Effectively increase the utilization efficiency of frequency spectrum, and but also access point when switching to other basic service sets and being communicated, energy
Enough websites notified in former basic service set, and then the website in former basic service set is able to enter dormant state to reduce function
Consumption.
Detailed description of the invention
Fig. 1 shows the interactive process schematic diagram of access point and website in a transmission opportunity in the related technology；
Fig. 2 shows the schematic flow diagrams of the communication means of WLAN according to first embodiment of the invention；
Fig. 3 shows the schematic flow diagram of the communication means of the WLAN of second embodiment according to the present invention；
Fig. 4 shows the schematic block diagram of the communication device of WLAN according to first embodiment of the invention；
Fig. 5 shows the schematic block diagram of the access point of embodiment according to the present invention；
Fig. 6 shows the schematic flow diagram of the communication means of the WLAN of third embodiment according to the present invention；
Fig. 7 shows the schematic flow diagram of the communication means of the WLAN of the 4th embodiment according to the present invention；
Fig. 8 shows the schematic block diagram of the communication device of the WLAN of second embodiment according to the present invention；
Fig. 9 shows the schematic block diagram of the website of embodiment according to the present invention；
Figure 10 shows the interactive process of access point and website in a transmission opportunity of embodiment according to the present invention
Schematic diagram；
Figure 11 shows the schematic flow diagram of the communication means of the WLAN of the 5th embodiment according to the present invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 2 shows the schematic flow diagrams of the communication means of WLAN according to first embodiment of the invention.
As shown in Fig. 2, the communication means of WLAN according to first embodiment of the invention, comprising:
Step S20, generates confirmation message frame, and the confirmation message frame concentrates the first basic service for feeding back access point
The reception condition of uplink data frames that sends of website, include indicating bit in the confirmation message frame, the indicating bit is used for
Instruction access point can successively send CF-End frame and handover request frame after sending the confirmation message frame, and the CF-End frame is used
Transfer resource that the website that first basic service is concentrated distributes but not used is turned into release in instruction access point, it is described
Handover request frame, which is used to indicate access point and will switch to the second basic service set, to be communicated.
Wherein, the physical carrier entity of the first basic service set and the second basic service set is all the transmission of confirmation message frame
Section fictionalizes different basic service sets in different times by square AP, the AP, the basic clothes for example fictionalized in first time period
Business integrates as BSS1, is BSS2 in the basic service set that second time period fictionalizes.
In addition, the confirmation message frame is multiuser downstream confirmation message frame, i.e. the confirmation message frame is directed to for AP and adopts
With the reception condition for the uplink data frames feedback that multiple websites of OFDMA technology are transmitted.
In one embodiment of the invention, the transfer resource includes the bandwidth resources of access point distribution, website adopts
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
Wherein, time span indicated by the duration field in the confirmation message frame are as follows: the confirmation message frame
It occupied time span, SIFS occupy 2 times of time span, the occupied time span of the CF-End frame and described cuts
Change the summation of the occupied time span of message frame.
In the technical scheme, due to after sending confirmation message frame, needing to send CF-End frame after SIFS, and
Need to send handover request frame, therefore the duration field in confirmation message frame after sending CF-End frame after SIFS
Indicated time span are as follows: 2 times, CF-End of the time span that the occupied time span of confirmation message frame, SIFS are occupied
The summation of the occupied time span of frame and the occupied time span of handover request frame.
Step S22 sends the confirmation message frame.
In one embodiment of the present of invention, the communication means of the WLAN, further includes: generate the CF-End
Frame；After sending the confirmation message frame, and the CF-End frame is sent after SIFS.Wherein, CF-End frame is described
The time interval sent after confirmation message frame can be SIFS, be also possible to the duration longer than the interval SIFS.
In the technical scheme, by after sending confirmation message frame, and CF-End frame is sent after SIFS, so that connecing
The website notice access point that access point can be concentrated to the first basic service, which will discharge, turns the website that the first basic service is concentrated
The extra transfer resource of distribution, effectively increases the utilization efficiency of frequency spectrum.
In the above-mentioned technical solutions, it is preferable that due to needing to send switching after SIFS after sending CF-End frame
Message frame, therefore time span indicated by the duration field in CF-End frame are as follows: when the CF-End frame is occupied
Between length, SIFS occupy time span and the occupied time span of handover request frame summation.
In one embodiment of the present of invention, the communication means of the WLAN, further includes: generate the handover request
Frame；After sending the CF-End frame, and the handover request frame is sent after SIFS.
In the technical scheme, by after sending CF-End frame, and handover request frame is sent after SIFS, make it possible to
Enough website notice access points concentrated to the first basic service can switch to the second basic service set and be communicated, and then the first base
Website in this services set can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
In the above-mentioned technical solutions, it is preferable that the time indicated by the duration field in the handover request frame is long
Degree is 0.
In one embodiment of the invention, as shown in figure 3, before step S20, further includes:
Step S30, generates communication resource distribution message frame, and the communication resource distribution message frame is used for first base
Website allocation of transmission resources in this services set.
Step S32 sends the communication resource distribution message frame, and receives the website root that first basic service is concentrated
Uplink data frames transmitted by transfer resource according to communication resource distribution message frame instruction.
Step S34, judges whether the upstream data for all websites that first basic service is concentrated all is sent completely, and
When determining that the upstream data of all websites of the first basic service concentration is all sent completely, step S20 is executed.
Specifically, when the website distribution transmission that access point is concentrated by communication resource distribution message frame to the first basic service
After resource, if the upstream data for all websites that the first basic service is concentrated all is sent completely, access point can be discharged
Remaining transfer resource, i.e., extended meeting sends the indicating bit of CF-End frame after being arranged in the confirmation message frame of generation, is connect with instruction
Access point can discharge remaining transfer resource.
In one embodiment of the invention, step S34 is specifically included: obtaining the institute that first basic service is concentrated
There is the value of the More Data field in the mac frame head for the uplink data frames that each website is sent in website；If all websites
The value of More Data field in the mac frame head of the uplink data frames of transmission is 0, it is determined that the uplink of all websites
Data are all sent completely.
In the communication means of Fig. 2 and WLAN shown in Fig. 3, to disappear to website instruction access point in transmission confirmation
CF-End frame and handover request frame can be successively sent after breath frame, makes it possible to notify access point can discharge to turn the first base to website
Transfer resource that website in this services set distributes but not used, i.e., access point, which can discharge, turns the first basic service concentration
Website distribution extra transfer resource, effectively increase the utilization efficiency of frequency spectrum.Meanwhile it also allowing for basic to first
Website notice access point in services set can switch to the second basic service set and be communicated, and then the first basic service concentration
Website can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
Wherein, the executing subject of communication means shown in Fig. 2 and Fig. 3 can be router etc..
Fig. 4 shows the schematic block diagram of the communication device of WLAN according to first embodiment of the invention.
As shown in figure 4, the communication device 400 of WLAN according to first embodiment of the invention, comprising: generate
Unit 402 and transmission unit 404.
Wherein, generation unit 402 is for generating confirmation message frame, and the confirmation message frame is for feeding back access point to first
The reception condition for the uplink data frames that the website that basic service is concentrated is sent includes indicating bit in the confirmation message frame, institute
CF-End frame and handover request frame, institute can successively be sent after sending the confirmation message frame by stating indicating bit and being used to indicate access point
State CF-End frame be used to indicate access point will release turn it is website distribution that first basic service is concentrated but not used
Transfer resource, the handover request frame, which is used to indicate access point and will switch to the second basic service set, to be communicated；It sends single
Member 404 is for sending the confirmation message frame.
In specific implementation, generation unit 402 can be signal processor, central processing unit or baseband processor etc.；Hair
Unit 404 is sent to can be transmitter (Transmitter) or antenna.
In the technical scheme, by the way that indicating bit is arranged in confirmation message frame, to be sent to website instruction access point
CF-End frame and handover request frame can be successively sent after confirmation message frame, make it possible to notify access point can discharge to turn to website
The website distribution that first basic service is concentrated but not used transfer resource, i.e. access point, which can discharge, turns the first basic clothes
The extra transfer resource for the website distribution that business is concentrated, effectively increases the utilization efficiency of frequency spectrum.Meanwhile it also allowing for
The website notice access point that one basic service is concentrated can switch to the second basic service set and be communicated, and then the first basic service
The website of concentration can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
Wherein, the physical carrier entity of the first basic service set and the second basic service set is all the transmission of confirmation message frame
Section fictionalizes different basic service sets in different times by square AP, the AP, the basic clothes for example fictionalized in first time period
Business integrates as BSS1, is BSS2 in the basic service set that second time period fictionalizes.
In addition, in the technical scheme, the confirmation message frame is multiuser downstream confirmation message frame, i.e. the confirmation disappears
Breath frame is directed to the reception condition for the uplink data frames feedback transmitted using multiple websites of OFDMA technology by AP.
In one embodiment of the invention, the transfer resource includes the bandwidth resources of access point distribution, website adopts
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
In the above-mentioned technical solutions, it is preferable that the communication device 400 of the WLAN, further includes: receiving unit
406 and judging unit 408.Wherein, the generation unit 402 is also used to, and before generating the confirmation message frame, generates communication
Resource allocation message frame, the website distribution transmission that the communication resource distribution message frame is used to concentrate to first basic service
Resource, and for determining that the upstream data for all websites that first basic service is concentrated all is sent out in the judging unit 408
When sending completion, the confirmation message frame is generated；The transmission unit 404 is also used to, and sends the communication resource distribution message frame；
The receiving unit 406 is used to receive the website that first basic service is concentrated and is referred to according to the communication resource distribution message frame
Uplink data frames transmitted by the transfer resource shown；The judging unit 408 is used to judge what first basic service was concentrated
Whether the upstream data of all websites is all sent completely.
Specifically, when the website distribution transmission that access point is concentrated by communication resource distribution message frame to the first basic service
After resource, if the upstream data for all websites that the first basic service is concentrated all is sent completely, access point can be discharged
Remaining transfer resource, i.e., extended meeting sends the indicating bit of CF-End frame after being arranged in the confirmation message frame of generation, is connect with instruction
Access point can discharge remaining transfer resource.
In specific implementation, receiving unit 406 can be receiver or antenna；Judging unit 408 can be central processing
Device or baseband processor etc..
In the above-mentioned technical solutions, it is preferable that the judging unit 408 includes: acquiring unit 4082 and determination unit
4084。
Wherein, acquiring unit 4082 is used to obtain each website in all websites that first basic service is concentrated and sends
Uplink data frames mac frame head in More Data field value；Determination unit 4084 is used to send in all websites
Uplink data frames mac frame head in the value of More Data field when being 0, determine the upstream data of all websites
All it is sent completely.
In any of the above-described technical solution, it is preferable that when indicated by the duration field in the confirmation message frame
Between length are as follows: 2 times, the CF-End frame of the time span that the occupied time span of the confirmation message frame, SIFS are occupied
The summation of occupied time span and the occupied time span of handover request frame.
In the technical scheme, due to after sending confirmation message frame, needing to send CF-End frame after SIFS, and
Need to send handover request frame, therefore the duration field in confirmation message frame after sending CF-End frame after SIFS
Indicated time span are as follows: 2 times, CF-End of the time span that the occupied time span of confirmation message frame, SIFS are occupied
The summation of the occupied time span of frame and the occupied time span of handover request frame.
In any of the above-described technical solution, it is preferable that the generation unit 402 is also used to, and generates the CF-End frame；Institute
It states transmission unit 404 to be also used to, after sending the confirmation message frame, and sends the CF-End frame after SIFS.Wherein,
The time interval that CF-End frame is sent after confirmation message frame can be SIFS, when being also possible to longer than the interval SIFS
It is long.
In the technical scheme, by after sending confirmation message frame, and CF-End frame is sent after SIFS, so that connecing
The website notice access point that access point can be concentrated to the first basic service, which will discharge, turns the website that the first basic service is concentrated
The extra transfer resource of distribution, effectively increases the utilization efficiency of frequency spectrum.
In the above-mentioned technical solutions, it is preferable that due to needing to send switching after SIFS after sending CF-End frame
Message frame, therefore time span indicated by the duration field in CF-End frame are as follows: when the CF-End frame is occupied
Between length, SIFS occupy time span and the occupied time span of handover request frame summation.
In any of the above-described technical solution, it is preferable that the generation unit 402 is also used to, and generates the handover request frame；
The transmission unit 404 is also used to, and after sending the CF-End frame, and the handover request frame is sent after SIFS.
In the technical scheme, by after sending CF-End frame, and handover request frame is sent after SIFS, make it possible to
Enough website notice access points concentrated to the first basic service can switch to the second basic service set and be communicated, and then the first base
Website in this services set can enter dormant state, effectively reduce the power consumption of the website of the first basic service concentration.
In the above-mentioned technical solutions, it is preferable that the time indicated by the duration field in the handover request frame is long
Degree is 0.
Fig. 5 shows the schematic block diagram of the access point of embodiment according to the present invention.
As shown in figure 5, the access point 500 of embodiment according to the present invention, comprising: WLAN as shown in Figure 4
Communication device 400.
Fig. 6 shows the schematic flow diagram of the communication means of the WLAN of third embodiment according to the present invention.
As shown in fig. 6, the communication means of the WLAN of third embodiment according to the present invention, comprising:
Step S60, the website that the first basic service is concentrated receive confirmation message frame, and the confirmation message frame connects for feeding back
The reception condition for the uplink data frames that access point sends the website includes indicating bit in the confirmation message frame, the finger
Show that position is used to indicate access point and can successively send CF-End frame and handover request frame after sending the confirmation message frame, it is described
CF-End frame is used to indicate access point and the website distribution but not used transfer resource, the handover request is turned in release
Frame, which is used to indicate access point and will switch to the second basic service set, to be communicated.
Step S62 successively receives the CF-End frame and the handover request frame.
Step S64, when receiving the handover request frame, into dormant state.
In the technical scheme, access point is used to indicate after sending confirmation message frame by being arranged in confirmation message frame
The indicating bit of CF-End frame and handover request frame, the website that access point is concentrated to the first basic service can successively be sent
Notice access point can discharge the website distribution for turning the first basic service concentration but not used transfer resource, i.e. access point energy
The extra transfer resource of the website distribution of the first basic service concentration is turned in enough release, and effectively increase frequency spectrum utilizes effect
Rate.Meanwhile but also website can detect handover request frame according to the indicating bit, to enter when detecting handover request frame
Dormant state effectively reduces the power consumption of the website of the first basic service concentration.
In one embodiment of the invention, as shown in fig. 7, before step S60, further includes:
Step S70, receives communication resource distribution message frame, which is used for access point to the first base
Website allocation of transmission resources in this services set.
Step S72 sends upstream data to access point according to the transfer resource of communication resource distribution message frame instruction
Frame.
Wherein, the executing subject of Fig. 6 and communication means shown in fig. 7 can be mobile phone, PDA (Personal
Digital Assistant, palm PC) etc..
Fig. 8 shows the schematic block diagram of the communication device of the WLAN of second embodiment according to the present invention.
As shown in figure 8, the communication device 800 of the WLAN of second embodiment according to the present invention, comprising: receive
Unit 802 and processing unit 804.
Wherein, receiving unit 802 is for receiving confirmation message frame, and the confirmation message frame is for feeding back access point to first
The reception condition for the uplink data frames that the website that basic service is concentrated is sent includes indicating bit in the confirmation message frame, institute
CF-End frame and handover request frame, institute can successively be sent after sending the confirmation message frame by stating indicating bit and being used to indicate access point
State CF-End frame be used to indicate access point will release turn it is website distribution that first basic service is concentrated but not used
Transfer resource, the handover request frame, which is used to indicate access point and will switch to the second basic service set, to be communicated, and is used for
Successively receive the CF-End frame and the handover request frame；Processing unit 804 is used to receive in the receiving unit described
When handover request frame, into dormant state.
In specific implementation, receiving unit 802 can be receiver or antenna；Processing unit 804 can be central processing
Device or baseband processor etc..
In the technical scheme, access point is used to indicate after sending confirmation message frame by being arranged in confirmation message frame
The indicating bit of CF-End frame and handover request frame, the website that access point is concentrated to the first basic service can successively be sent
Notice access point can discharge the website distribution for turning the first basic service concentration but not used transfer resource, i.e. access point energy
The extra transfer resource of the website distribution of the first basic service concentration is turned in enough release, and effectively increase frequency spectrum utilizes effect
Rate.Meanwhile but also website can detect handover request frame according to the indicating bit, to enter when detecting handover request frame
Dormant state effectively reduces the power consumption of the website of the first basic service concentration.
In the above-mentioned technical solutions, it is preferable that the receiving unit 802 is also used to: receive the confirmation message frame it
Before, communication resource distribution message frame is received, the communication resource distribution message frame is concentrated for access point to the first basic service
Website allocation of transmission resources；The communication device 800 of the WLAN further include: transmission unit 806, for according to
The transfer resource of communication resource distribution message frame instruction sends uplink data frames to access point.
In specific implementation, transmission unit 806 can be transmitter (Transmitter) or antenna.
Fig. 9 shows the schematic block diagram of the website of embodiment according to the present invention.
As shown in figure 9, the website 900 of embodiment according to the present invention, comprising: WLAN as shown in Figure 8
Communication device 800.
In conclusion technical solution of the present invention mainly switches to the other basic services fictionalized in physics AP needs
When collection, the station of current basic service concentration is notified by way of M-BA+CF-End+Transition (handover request frame)
On the one hand point discharges the website for distributing to that current basic service is concentrated in trigger frame (i.e. communication resource distribution message frame)
But the transfer resource not used, the website notice access point on the other hand concentrated to current basic service will switch to it
Its basic service set is communicated.It is specific as shown in Figure 10, in a transmission opportunity, if current basic service concentrate it is all
Website need to only send a UL MU PPDU, not need all durations that AP is distributed in trigger frame, then AP is to STAs
CF-End frame can be sent later by sending M-BA, to discharge remaining duration resource, be herein referred to as the duration resource discharged
It is terminated in advance for the TXOP namely TXOP of interception.AP can send handover request frame after sending CF-End frame, with to current
The website notice access point that basic service is concentrated will switch to other basic service sets and be communicated.
Specifically includes the following steps:
Step 1:AP is after having sent trigger frame, when receiving the uplink data frames of STAs transmission, if all STAs
The More Data field of the mac frame head of the uplink data frames of transmission is disposed as " 0 ", then it represents that all STAs are not upper
Row data needs continue to transmit, and AP can reply confirmation message frame M-BA to the upstream data that these have been transmitted at this time.
Step 2:AP replys M-BA information frame to STAs.
Wherein, if AP will switch to other basic service sets and be communicated, M-BA+CF-End+ is used
The mode of Transition.Specifically: AP takes indicating bit in M-BA message frame, indicates that subsequent AP can send CF-End frame
The resource not used is discharged, and indicates that subsequent AP can send Transition frame to indicate to switch to other basic clothes
Business collection is communicated.
Preferably, the value of Duration field is arranged in M-BA frame mac frame head are as follows: the occupied duration+SIFS+ of M-BA
The occupied occupied duration of duration+SIFS+Transition frame of CF-End.
Step 3:AP sends CF-End frame, the value setting of the Duration field in CF-End frame are as follows: occupied by CF-End
The occupied duration of duration+SIFS+Transition frame；
Step 4:AP sends Transition frame, and the value of the Duration field in Transition frame is set as 0.Its
In, the destination address in the destination address and trigger frame of Transition frame is set as identical.
Figure 11 shows the schematic flow diagram of the communication means of the WLAN of the 5th embodiment according to the present invention.
As shown in figure 11, the communication means of the WLAN of the 5th embodiment according to the present invention, comprising:
Step 1101, access point 1 generates trigger frame.Wherein, the biography that access point 1 is distributed to website 2 is contained in trigger frame
Defeated resource.
Step 1102, access point 1 sends trigger frame.
Step 1103, website 2 receives trigger frame.
Step 1104, website 2 obtains the transfer resource distributed in trigger frame.
Step 1105, website 2 sends uplink data frames to access point 1 based on the transfer resource got.
Step 1106, the uplink data frames that 1 receiving station 2 of access point is sent.
Step 1107, access point 1 generates confirmation message frame.Wherein, when the upstream data that access point 1 is sent according to website 2
Frame determines that all websites all continue to transmit without upstream data needs, and needs to switch to other basic service sets and communicated
When, indicating bit is taken in confirmation message frame, has not been used with indicating after access point 1 that extended meeting sends CF-End frame to discharge
Transfer resource, and indicate that subsequent AP can send handover request frame to indicate to switch to other basic service sets and lead to
Letter.
Step 1108, access point 1 sends confirmation message frame.
Step 1109, access point 1 sends CF-End frame.
Step 1110, access point 1 sends handover request frame.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, and the invention proposes a kind of new WLANs
Communication plan, on the one hand enable access point discharge turn website distribution extra transfer resource, effectively increase frequency
The utilization efficiency of spectrum, on the other hand but also access point can notify original when switching to other basic service sets and being communicated
Website in basic service set, and then the website in former basic service set is able to enter dormant state to reduce power consumption.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (20)
1. a kind of communication means of WLAN characterized by comprising
Confirmation message frame is generated, the confirmation message frame is used to feed back what access point sent the website that the first basic service is concentrated
The reception condition of uplink data frames includes indicating bit in the confirmation message frame, and the indicating bit is used to indicate access point and exists
CF-End frame and handover request frame can be successively sent after sending the confirmation message frame, the CF-End frame is used to indicate access point
The website distribution that first basic service is concentrated but not used transfer resource is turned into release, the handover request frame is used
The second basic service set will be switched in instruction access point to be communicated；
Send the confirmation message frame.
2. the communication means of WLAN according to claim 1, which is characterized in that in the generation confirmation message frame
The step of before, further includes:
Communication resource distribution message frame is generated, what the communication resource distribution message frame was used to concentrate to first basic service
Website allocation of transmission resources；
The communication resource distribution message frame is sent, and receives the website that first basic service is concentrated and is provided according to the communication
Uplink data frames transmitted by the transfer resource of source assignment messages frame instruction；
Judge whether the upstream data for all websites that first basic service is concentrated all is sent completely；
When determining that the upstream data of all websites of the first basic service concentration is all sent completely, described generate really is executed
The step of recognizing message frame.
3. the communication means of WLAN according to claim 2, which is characterized in that judge first basic service
The step of whether upstream data for all websites concentrated all is sent completely, specifically includes:
In the mac frame head for obtaining the uplink data frames that each website is sent in all websites that first basic service is concentrated
The value of More Data field；
If the value of the More Data field in the mac frame head for the uplink data frames that all websites are sent is 0, it is determined that
The upstream data of all websites is all sent completely.
4. the communication means of WLAN according to claim 1, which is characterized in that holding in the confirmation message frame
Time span indicated by continuous duration field is equal to: the time that the occupied time span of the confirmation message frame, SIFS are occupied
2 times, the occupied time span of the CF-End frame, the summation of the occupied time span of handover request frame of length.
5. the communication means of WLAN according to any one of claim 1 to 4, which is characterized in that further include:
Generate the CF-End frame；
After sending the confirmation message frame, and the CF-End frame is sent after SIFS.
6. the communication means of WLAN according to claim 5, which is characterized in that continue in the CF-End frame
Time span indicated by duration field is equal to: time span that the occupied time span of the CF-End frame, SIFS are occupied,
The summation of the occupied time span of handover request frame.
7. the communication means of WLAN according to claim 5, which is characterized in that further include:
Generate the handover request frame；
After sending the CF-End frame, and the handover request frame is sent after SIFS.
8. the communication means of WLAN according to claim 7, which is characterized in that holding in the handover request frame
Time span indicated by continuous duration field is 0.
9. a kind of communication means of WLAN characterized by comprising
The website that first basic service is concentrated receives confirmation message frame, and the confirmation message frame is for feeding back access point to the station
The reception condition of the uplink data frames sent is put, includes indicating bit in the confirmation message frame, the indicating bit is used to indicate
Access point can successively send CF-End frame and handover request frame after sending the confirmation message frame, and the CF-End frame is for referring to
Show that release is turned the website distribution but not used transfer resource by access point, the handover request frame is used to indicate access
Point will switch to the second basic service set and be communicated；
Successively receive the CF-End frame and the handover request frame；
When receiving the handover request frame, into dormant state.
10. a kind of communication device of WLAN characterized by comprising
Generation unit, for generating confirmation message frame, the confirmation message frame is for feeding back access point to the first basic service set
In the reception condition of uplink data frames that sends of website, include indicating bit in the confirmation message frame, the indicating bit is used
CF-End frame and handover request frame, the CF-End frame can be successively sent after sending the confirmation message frame in instruction access point
It is used to indicate access point and transfer resource that the website that first basic service is concentrated distributes but not used, institute is turned into release
It states handover request frame and is used to indicate access point and will switch to the second basic service set and communicated；
Transmission unit, for sending the confirmation message frame.
11. the communication device of WLAN according to claim 10, which is characterized in that further include: receiving unit and
Judging unit；
Wherein, the generation unit is also used to, and before generating the confirmation message frame, generates communication resource distribution message frame,
The communication resource distribution message frame is used for the website allocation of transmission resources concentrated to first basic service, and in institute
When stating the upstream datas of all websites that judging unit determines that first basic service is concentrated and being all sent completely, generate it is described really
Recognize message frame；
The transmission unit is also used to, and sends the communication resource distribution message frame；
The receiving unit is used to receive the website of the first basic service concentration according to the communication resource distribution message frame
Uplink data frames transmitted by the transfer resource of instruction；
Whether the upstream data for all websites that the judging unit is used to judge that first basic service is concentrated all has sent
At.
12. the communication device of WLAN according to claim 11, which is characterized in that the judging unit includes:
Acquiring unit, for obtaining the uplink data frames that each website is sent in all websites that first basic service is concentrated
Mac frame head in More Data field value；
Determination unit, the value for the More Data field in the mac frame head for the uplink data frames that all websites are sent
When being 0, determine that the upstream data of all websites is all sent completely.
13. the communication device of WLAN according to claim 10, which is characterized in that in the confirmation message frame
Time span indicated by duration field is equal to: the occupied time span of the confirmation message frame, SIFS occupy when
Between 2 times of length, the occupied time span of the CF-End frame, the occupied time span of handover request frame it is total
With.
14. the communication device of WLAN described in any one of 0 to 13 according to claim 1, it is characterised in that:
The generation unit is also used to, and generates the CF-End frame；
The transmission unit is also used to, and after sending the confirmation message frame, and the CF-End frame is sent after SIFS.
15. the communication device of WLAN according to claim 14, which is characterized in that holding in the CF-End frame
Time span indicated by continuous duration field is equal to: the time that the occupied time span of the CF-End frame, SIFS are occupied is long
The summation of degree, the occupied time span of handover request frame.
16. the communication device of WLAN according to claim 14, it is characterised in that:
The generation unit is also used to, and generates the handover request frame；
The transmission unit is also used to, and after sending the CF-End frame, and the handover request frame is sent after SIFS.
17. the communication device of WLAN according to claim 16, which is characterized in that in the handover request frame
Time span indicated by duration field is 0.
18. a kind of communication device of WLAN characterized by comprising
Receiving unit, for receiving confirmation message frame, the confirmation message frame is for feeding back access point to the first basic service set
In the reception condition of uplink data frames that sends of website, include indicating bit in the confirmation message frame, the indicating bit is used
CF-End frame and handover request frame, the CF-End frame can be successively sent after sending the confirmation message frame in instruction access point
It is used to indicate access point and transfer resource that the website that first basic service is concentrated distributes but not used, institute is turned into release
It states handover request frame and is used to indicate access point and will switch to the second basic service set and communicated, and for described in successively receiving
CF-End frame and the handover request frame；
Processing unit, for when the receiving unit receives the handover request frame, into dormant state.
19. a kind of access point characterized by comprising the WLAN as described in any one of claim 10 to 17
Communication device.
20. a kind of website characterized by comprising the communication device of WLAN as claimed in claim 18.
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| US7986937B2 (en) * | 2001-12-20 | 2011-07-26 | Microsoft Corporation | Public access point |
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| CN103326838A (en) * | 2012-03-20 | 2013-09-25 | 中兴通讯股份有限公司 | Transmission method releasing information channel access indication information and site equipment |
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