CN103561449B - Radio switch-in method and WAP - Google Patents
Radio switch-in method and WAP Download PDFInfo
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- CN103561449B CN103561449B CN201310552241.2A CN201310552241A CN103561449B CN 103561449 B CN103561449 B CN 103561449B CN 201310552241 A CN201310552241 A CN 201310552241A CN 103561449 B CN103561449 B CN 103561449B
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Abstract
A kind of radio switch-in method of present invention offer and WAP, a kind of radio switch-in method, it is adaptable to WLAN, including：The probe request message that access point AP receiving terminals STA send；The AP determines the type of the STA according to the frequency range for receiving the STA transmissions probe request message place, and the type of the STA includes the number of frequency bands that the STA is supported；The AP sends the detection to the STA in corresponding band according to the type of the STA and replies message, so that the STA accesses the WLAN.Radio switch-in method and WAP that the present invention is provided, for making the load balancing in WLAN.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of radio switch-in method and WAP.
Background technology
Institute of Electrical and Electric Engineers（Institute of Electrical and Electronics
Engineers, IEEE）802.11 serial protocols are for WLAN（Wireless Local Area Networks,
WLAN）The Primary communication frequency range of the standard of formulation, wherein IEEE802.11 is divided into two sections, respectively 2.4GHz and 5GHz.
From 2.4GHz to 2.4835GHz, the equipment for meeting 802.11b/g standards is operated in this frequency range to the frequency of 2.4GHz frequency ranges；
The frequency of 5GHz frequency ranges is divided into two sections, and respectively 5.15GHz to 5.35GHz and 5.725GHz to 5.825GHz meets 802.11a
The equipment of standard is operated in this frequency range.
With the development of WLAN, the user for carrying out radio communication using WLAN is more and more, wherein many users use energy
Enough double-frequency wireless terminals for supporting two frequency ranges of 2.4GHz and 5GHz simultaneously（Station, STA）, while wirelessly connecing in WLAN
Access point（Access Point, AP）Also there are dual frequency characteristics, can supports that the STA of two frequency ranges is accessed simultaneously.STA can pass through
Active or drive sweep mode find WLAN, so as to access WLAN, but for double frequency STA, can find two frequencies simultaneously
The mark of section, STA need to judge which frequency range accessed.Usually, the larger frequency range of STA selections access signal intensity, and due to
The signal frequency of 5GHz frequency ranges is higher, decays in the air very fast, therefore the signal of 2.4GHz frequency ranges can be big on identical position
Typically can all select to access 2.4GHz frequency ranges in the signal of 5GHz frequency ranges, therefore STA.
But in fact, 5GHz frequency ranges possess higher access capacity relative to 2.4GHz, STA selects to access 2.4GHz
Frequency range can cause the wasting of resources of the congestion of 2.4GHz frequency ranges and 5GHz frequency ranges.
The content of the invention
The present invention provides a kind of radio switch-in method and WAP, for making the load balancing in WLAN.
The present invention provides a kind of radio switch-in method, including：
The probe request message that access point AP receiving terminals STA send；
The AP determines the type of the STA according to the frequency range for receiving the STA transmissions probe request message place,
The type of the STA includes the number of frequency bands that the STA is supported；
The AP sends the detection to the STA in corresponding band according to the type of the STA and replies message, so that institute
State STA and access the WLAN.
The present invention also provides a kind of WAP, including：
Receiver module, for the probe request message that receiving terminal STA sends；
Processing module, for determining the STA according to the frequency range for receiving the STA transmissions probe request message place
Type, the type of the STA includes the number of frequency bands that the STA is supported；
Sending module, disappears for sending the detection reply to the STA in corresponding band according to the type of the STA
Breath, so that the STA accesses the WLAN.
Radio switch-in method and WAP that the present invention is provided, AP is by receiving the probe request message that STA sends
Frequency range judge the type of STA, reply message so as to send detection to STA in corresponding band, make STA access WLAN, due to STA
The frequency range for being accessed is determined by AP, therefore the load balancing of each frequency ranges of WLAN can be made by the setting of network-side.
Description of the drawings
The flow chart of the radio switch-in method embodiment one that Fig. 1 is provided for the present invention；
The flow chart of the radio switch-in method embodiment two that Fig. 2 is provided for the present invention；
The structural representation of the WAP embodiment one that Fig. 3 is provided for the present invention；
The structural representation of the WAP embodiment two that Fig. 4 is provided for the present invention；
The structural representation of the WAP embodiment three that Fig. 5 is provided for the present invention.
Specific embodiment
The radio switch-in method that the present invention is provided is applied to WLAN, defined in IEEE802.11 serial protocols
Two kinds of equipment, one kind are wireless terminal STA；Another kind is wireless access point AP, and the effect of wireless apss is to provide wirelessly
Bridge joint and cable network between.
The basic component unit of WLAN is Basic Service Set（Basic Service Set, BSS）, a BSS carries
For an overlay area, the STA holdings fully connection in BSS is made, general, a BSS is provided by an AP.The AP of double frequency is then
Two BSS are provided.One BSS possesses a unique BSSID（Basic Service Set
Identifier, BSSID）, BSSID is that all STA in same BSS share identifier in the frame head of sent message, long
Spend for 48（MAC Address）.Multiple BSS may be constructed an extended service set（Extended Service Set, ESS）, in ESS
The STA in portion can be with intercommunication, but the communication between the STA in difference BSS must be carried out by AP.Connect multiple AP is
It is referred to as distributed system（Distributed System, DS）.One wlan network generally corresponds to an ESS, and an ESS is gathered around
There is a unique service set（Service Set Identifier, SSID）, SSID can regard the name of WLAN as.
That is multiple BSS can be included in a WLAN, SSID and BSSID is the relation of one-to-many.STA has found the process of WLAN
The process of SSID and BSSID corresponding relations is found exactly.STA can access this after the SSID and BSSID for finding WLAN
WLAN。
In existing radio switch-in method, before STA accesses WLAN, it is necessary first to which residing for which, range searching can be accessed
WLAN, the mode of search can pass through active scan or drive sweep.
When STA scans WLAN by drive sweep mode, constantly beacon is monitored in switching to STA on each channel
（Beacon）Frame, and the information from all Beacon frames for being received can be recorded.Beacon frames be exactly in design in order to
Allow STA to know and the parameter required for certain BSS is added to be communicated, wherein comprising SSID and corresponding BSSID.Each nothing
Report from a liner text all carries BSSID, and Beacon frames are no exception.After STA receives the Beacon frames comprising SSID and BSSID, i.e.,
Would know which BSS regions has, such that it is able to select one to be accessed.
When STA scans WLAN by active scan mode, it is divided into three kinds of situations.
The first is：Broadcast probe request on channels of the STA in the channel list supported（Probe Request）
Frame, wherein SSID are sky；AP in network（May have multiple）After receiving Probe Request frames, respond detection and reply
（Probe Response）Frame, wherein the corresponding relation comprising SSID and BSSID.So that STA knows what region was present
BSS, such that it is able to select one to be accessed.By active scan, such case can know whether that presence can suitable for STA
The wireless service for using.
It is for second：Probe Request frames are broadcasted on channels of the STA in the channel list supported, wherein carrying
The SSID for specifying；In this case, because STA carries the SSID for specifying, the AP being only provided with the WLAN of this SSID service
Could receive, the AP responds Probe Response frames after receiving, wherein the corresponding relation comprising SSID and BSSID.So that
STA knows the BSS that region is present, such that it is able to select one to be accessed.Such case is swept by active suitable for STA
Retouch the wireless network for finding to specify.
The third is：Probe Request frames are broadcasted on channels of the STA in the channel list supported, wherein carrying
The SSID for specifying and BSSID, this probe request have had been out the meaning for finding WLAN, are generally used to the guarantor after associating
Living, i.e. STA sends uni-cast probe request and gives certain BSS, determines whether the BSS is also present.As this frame is previous in STA associations not
Can send.
After above-mentioned three kinds of situations find WLAN, the WLAN that STA will be seen that forms a list and selects to access for user,
Index is exactly SSID, but a SSID corresponds to one or more BSSID（General system does not show BSSID to user）.With
After family selects a SSID, STA will select one from corresponding BSSID lists（Usually signal intensity is maximum）
BSSID, sends certification request to corresponding AP, carries out networking request.
Current WLAN mainly provides 2.4GHz and 5GHz two frequency ranges, as the STA of double frequency is provided simultaneously with using two
The access capability of frequency range, which can send probe request simultaneously in two frequency ranges.Double frequency STA access networks, the selection to AP have
There are autonomy and uncertainty.Generally, if a double frequency AP provides service, i.e., one in two frequency ranges simultaneously
SSID two BSSID of correspondence, one in each frequency range；So under normal circumstances, STA selects the probability of 2.4GHz than selecting
The probability of 5GHz is much bigger, and this is that the inherent character of two frequency ranges is determined.Due to 5GHz frequency band signals frequencies it is higher, relatively
Decay in the air comparatively fast in the signal of 2.4GHz frequency ranges, and the upper limit of emission power of two frequency band signals is all identical, it is indoor
AP is 100 milliwatts, so causing the coverage of 5GHz signals more much smaller than 2.4GHz.When STA and AP distances are fixed,
The 5GHz signals received on STA are also weaker than 2.4GHz, so STA can typically select to access the access of 2.4GHz frequency ranges.
In STA compact districts, double frequency STA faces multiple access points, it is possible to which most of double frequency STA selects 2.4GHz frequency ranges
Network is accessed, the load for thus easily causing 2.4GHz frequency ranges is too big, crowded, and the load of 5GHz frequency ranges is too little, idle.
The flow chart of the radio switch-in method embodiment one that Fig. 1 is provided for the present invention, the present embodiment are applied to wireless local
Net, the executive agent of the present embodiment are the access point in WLAN, as shown in figure 1, the method for the present embodiment includes：
Step S101, AP receive the probe request message that STA sends.
Specifically, in the present embodiment, STA accesses WLAN by way of active scan, and AP can receive STA transmissions
Probe Request frames.SSID can not be included in the Probe Request frames that STA sends, it is also possible to including SSID, but not
Including BSSID.Three kinds of situations during WLAN, the Probe that STA sends are scanned according to above-mentioned STA by active scan mode
Request frames include that the situation of BSSID is only used for the keep-alive after associating, and the radio switch-in method that the present embodiment is provided is to use
Do not include BSSID in making STA access WLAN, therefore the Probe Request frames of STA transmissions.Therefore AP receives STA transmissions
Probe Request frames after, need to STA send Probe Response frames inform the corresponding BSSID of STA.AP can be with
In the Probe Request frames that one or more UHF band reception to STA sends.
Step S102, AP determine the type of STA according to the frequency range for receiving the probe request message place that STA sends, STA's
Type includes the number of frequency bands that STA is supported.
Specifically, as STA possibly single-frequency STA is also likely to be double frequency STA, and STA can be sent out in the frequency range supported
Send Probe Request frames, therefore the Probe Request frames that AP may be sent in one or two UHF band reception to STA.AP
The frequency range being located according to the Probe Request frames for receiving can know what the STA for sending the Probe Request frames was supported
Frequency range.AP thereby determines that the type of STA, and the type of STA includes the quantity of the frequency range that STA is supported, such as STA only support single-frequency or
STA supports double frequency.
It should be noted that, although the STA in current WLAN only supports double frequency, it is conceivable that with WLAN skills
The development of art, WLAN may provide service in more frequency ranges, and STA is likely to while supporting three frequencies or more frequency ranges.This reality
The radio switch-in method for applying example offer can be applied equally to the situation that STA supports multiple frequency ranges.Therefore, in the present embodiment, AP
The Probe Request frames that may be sent in plural UHF band reception STA, so that it is determined that the type of STA.
Step S103, AP send detection to STA in corresponding band according to the type of STA and reply message, so that STA accesses nothing
Line LAN.
Specifically, the type of AP STA according to determined by, sends Probe Response frame to STA in corresponding frequency range,
The Probe Response frames include the BSSID of the BSS of the corresponding band provided by the SSID and AP of AP places WLAN, so that
STA accesses WLAN in corresponding frequency range.In this case, it is to send Probe Response frames according to AP which BSS STA accesses
Frequency range determined by, as the STA that STA is double frequency or multifrequency, AP can be according to the current load feelings of WLAN each frequency range
Condition and Probe Response frame is sent to STA less frequency range is loaded so that the load balancing of each frequency ranges of WLAN.
The present embodiment, AP judge the type of STA by the frequency range for receiving the probe request message that STA sends, so as in phase
Answer frequency range detection to be sent to STA to reply message, make STA access WLAN, as the frequency range accessed by STA is determined by AP, because
This can make the load balancing of each frequency ranges of WLAN by the setting of network-side.
Further, in step S102, AP determines STA according to the frequency range for receiving the probe request message place that STA sends
Type, the type of STA includes the number of frequency bands that STA is supported, including：If the spy that AP is only sent to STA in a UHF band reception
Survey request message, it is determined that STA is single-frequency STA；If the probe request message that AP is sent in N number of UHF band reception to STA, it is determined that
STA is N frequency STA.
Specifically, AP can determine STA's according to the quantity of the frequency range of the Probe Request frames for receiving STA transmissions
Type, the type of STA are the quantity of the frequency range supported by STA.What if such as AP was only sent to STA in a UHF band reception
Probe Request frames, then AP determine the STA be single-frequency STA；If the Probe that AP is sent to STA in two UHF band receptions
Request frames, then AP determine the STA be double frequency STA；The rest may be inferred, if what AP was sent in N number of UHF band reception to STA
ProbeRequest frames, then AP determine the STA be N frequency STA.General, when AP receives the Probe Request of STA transmissions
After frame, Probe Response frame can be sent to STA in the frequency range for receiving Probe Request frames immediately, and in the present invention, be
The type of identification STA, needs are arranged in AP accordingly, the Probe that makes AP send to STA in a UHF band reception
After Request frames, first do not reply, and be to wait for default a period of time, such as 1 second or 2 seconds, in default monitoring in time be
The no Probe Request frames that can be sent to the STA in other UHF band receptions.If AP does not receive STA after Preset Time
In the Probe Request frames that other frequency ranges send, then AP determines that the STA is single-frequency STA；If AP is after Preset Time at other
UHF band reception has arrived the Probe Request frames of STA transmissions, then AP is according to the frequency for receiving the Probe Request frames that STA sends
Section sum, determines the type of STA.After time-out of default time, AP has determined that the type of STA, and now AP is again corresponding
Frequency range sends Probe Response frames to STA.
Although AP does not first reply Probe Response frames after Probe Request frames are received, but interval is default
Time sends Probe Response frames to STA again can cause STA to find that the time of WLAN is elongated, but this is only limitted to STA the
When once accessing WLAN, after AP recognizes the type of STA, the problem that would not occur again postponing.And AP is for STA types
Detection has substantially no effect on the use of user.
The flow chart of the radio switch-in method embodiment two that Fig. 2 is provided for the present invention, the present embodiment are applied to wireless local
Net, the executive agent of the present embodiment are the access point in WLAN, as shown in Fig. 2 the method for the present embodiment includes：
Step S201, AP receive the probe request message that STA sends.
Specifically, this step is identical with step S102.
Step S202, if the probe request message that AP is only sent to STA in a UHF band reception, it is determined that STA is single-frequency
STA；If the probe request message that AP is sent in N number of UHF band reception to STA, it is determined that STA is N frequency STA, N>1.
Specifically, AP can determine STA's according to the quantity of the frequency range of the Probe Request frames for receiving STA transmissions
Type, the type of STA are the quantity of the frequency range supported by STA.What if such as AP was only sent to STA in a UHF band reception
Probe Request frames, then AP determine the STA be single-frequency STA；If the Probe that AP is sent to STA in two UHF band receptions
Request frames, then AP determine the STA be double frequency STA；The rest may be inferred, if the Probe that AP is sent in N number of UHF band reception to STA
Request frames, then AP determine the STA be N frequency STA, N>1.Execution step S203 if AP determines STA for single-frequency STA, if AP is true
It is N frequencies STA then execution steps S204 to determine STA.
Step S203, if AP determines that STA is single-frequency STA, AP is in the probe request message for receiving STA transmissions
Frequency range sends the detection to STA and replies message, so that STA accesses WLAN in the frequency range for sending probe request message.
Specifically, if AP determines that STA is single-frequency STA, that is to say, that STA only supports a frequency range, and the STA can only be at one
Access WLAN in frequency range, therefore AP only needs to Probe Response frames be sent to STA in the frequency range supported in STA, then STA is just
SSID and BSSID can be obtained so as to access WLAN in the frequency range.
Step S204, if AP determines that STA is N frequency STA, AP is according to tactful one or more in N number of frequency range of reply
Frequency range sends detection to STA and replies message, so as to STA selects one in the frequency range that detection is replied message is received access wirelessly
LAN.
Specifically, if AP determines STA for N frequency STA, the STA can access WLAN in multiple frequency ranges, now
Probe can be sent to STA on one or more according to the reply strategy in AP in N number of frequency range that STA is supported
Include the BSSID of the SSID and corresponding band of WLAN in Response frames, wherein each Probe Response frame.STA exists
After receiving the Probe Response frames, can select in AP sends one or more frequency ranges of Probe Response frames
One, WLAN is accessed using the SSID and BSSID that include in the Probe Response frames of the frequency range.
It should be noted that above-mentioned reply strategy can be preset in AP, or AP according to its place WLAN
What current load condition was dynamically determined.For example for current WLAN, connecing for 2.4GHz and two frequency ranges of 5GHz can be provided
Enter service, then the double frequency STA in an AP coverage in network can send Probe to AP in two frequency ranges
Request frames, AP is after two Probe Request frames are received, it may be determined that the STA is double frequency STA.If now in AP
In preset and reply that strategy is preferential for 5GHz, then AP can send Probe Response frame, the Probe to STA in 5GHz frequency ranges
Response frames include the BSSID of 5GHz frequency ranges in the SSID and the AP of AP places WLAN, and AP not 2.4GHz frequency ranges to
STA sends Probe Response frames.STA can access 5GHz frequencies after 5GHz frequency ranges receive Probe Response frames
Section.Likewise, AP only replys Probe in 2.4GHz frequency ranges if in AP, default reply strategy is 2.4GHz preferential
Response frames.In addition, can be so that without default strategy or the reply strategy of replying, as sky, now AP can be in two frequency ranges in AP
Probe Response frames are replied to STA, the frequency range accessed needed for independently being selected by STA, now STA is typically all selection signal
The larger frequency range of intensity.
Reply strategy in AP can also be what is be dynamically determined according to the current load conditions of WLAN, that is to say, that when AP connects
The Probe Request frames of STA are received, determines that STA supports multiple frequency ranges, then each frequency range that AP can be supported according to STA is worked as
Front load condition, the only frequency range for selecting load condition lighter, the frequency range in light load reply Probe Response to STA
Frame, makes STA access the frequency range of light load, so can more reasonably using the Radio Resource in WLAN.STA judges each frequency
The method of section load condition can use any one method of the prior art, such as STA use the number on different frequency range
The load of each frequency range is judged according to parameters such as the STA quantity for having been accessed on the channel utilization on flow, different frequency range, different frequency range
State, here is omitted.
In addition, the reply strategy in AP is not limited in a frequency range send Probe Response frames to STA, but can
To send Probe Response frames to STA in one or more frequency ranges, if AP is sent to STA in more than one frequency range
Probe Response frames, then independently judge need access WLAN in which frequency range by STA again.So equivalent to elder generation by AP
The frequency range that a part is not intended to STA accesses is got rid of, then accessed frequency range is independently selected by STA, then the access of STA is selected more
Greatly.
According to the method for the present embodiment, after AP receives the probe request of STA transmissions in multiple frequency ranges, according to returning
Multiple strategy in one or more frequency ranges sends detection to STA and replys frame, limits the frequency range of STA accesses from network side, can be with
The Internet resources reasonable employment of WLAN is made further.
The present embodiment, AP judge the type of STA by the frequency range for receiving the probe request message that STA sends, so as to basis
Reply strategy to reply message to STA transmission detections in one or more frequency range, make STA access WLAN, accessed due to STA
Frequency range is determined according to strategy is replied by AP, therefore can make the load of each frequency ranges of WLAN equal by the setting of network-side
Weighing apparatus.
Further, before above-mentioned steps S203 and step S204, also strategy is replied or according to wireless including default
The load parameter of LAN different frequency range is dynamically determined reply strategy, and the reply strategy includes indicating AP in one or more frequency ranges
On to STA send detection reply message.
In Fig. 1 and embodiment illustrated in fig. 2, the situation that STA accesses WLAN by active scan mode, but STA are only illustrated
WLAN can also be accessed by drive sweep mode, after STA gets SSID and BSSID by drive sweep mode, still may be used
Do not controlled by the AP of network side so that autonomous selection accesses WLAN.Therefore in the present invention, STA can also be cut off by passively sweeping
The mode of retouching accesses the means of WLAN, forces STA that WLAN is accessed by way of active scan.The method can include：It is wide in AP
SSID is hidden in the Beacon frames broadcast.
Therefore, the radio switch-in method that the present invention is provided also includes：AP broadcasts Beacon frames, does not include in the Beacon frames
The SSID of AP places WLAN.
Specifically, the hiding SSID first in the Beacon frames broadcasted by AP, that is to say, that make AP normal wide in a network
Beacon frames are broadcast, but the SSID of AP places WLAN is not broadcasted in Beacon frames.The Beacon frames are received so
STA can only therefrom obtain BSSID, and SSID can not be obtained, the Beacon frames that such STA cannot pass through to receive find
WLAN, thus cannot by way of drive sweep access network.Such Beacon frames can only be used as the guarantor after associating
It is living.That is, having cut off STA finds SSID so as to access the approach of WLAN by drive sweep mode, STA is forced
SSID is found by way of active scan.It is all to need by AP to select that specifically used which BSSID of so STA accesses WLAN
Select, thereby may be ensured that the Network Load Balance of WLAN.
The radio switch-in method for being provided with a specific embodiment explanation present invention below.
For example：An AP in WLAN supports double frequency, and the SSID of WLAN is " wlan-navigation ", what AP was provided
The BSSID of 2.4GHz frequency ranges BSS is " 0000.2222.2222 ", and the BSSID of 5GHz frequency ranges BSS provided by AP is
“0000.5555.5555”。
In prior art, AP can broadcast Beacon frames in a network, wherein in the Beacon frames of 2.4GHz multi-band broadcasts
Indicate that SSID " wlan-navigation " is corresponding with BSSID " 0000.2222.2222 ", and in the Beacon of 5GHz multi-band broadcasts
Indicate in frame that SSID " wlan-navigation " is corresponding with BSSID " 0000.5555.5555 ".
For single-frequency STA of 2.4GHz frequency ranges is only supported in network, which is only capable of receiving AP wide in 2.4GHz frequency ranges
The Beacon for broadcasting, and SSID " wlan-navigation " and BSSID " 0000.2222.2222 " is therefrom parsed, if user's choosing
Select the WLAN for SSID being accessed for " wlan-navigation ", then now STA can access BSSID for " 0000.2222.2222 "
Frequency range.
For single-frequency STA of 5GHz frequency ranges is only supported in network, which is only capable of receiving AP in 5GHz multi-band broadcasts
Beacon, and SSID " wlan-navigation " and BSSID " 0000.5555.5555 " is therefrom parsed, if user selects to connect
Enter the WLAN that SSID is " wlan-navigation ", then now STA can access the frequency that BSSID is " 0000.5555.5555 "
Section.
For the double frequency STA of 2.4GHz and 5GHz is supported in network simultaneously, AP can be received simultaneously in 2.4GHz
Frequency range and the Beacon of 5GHz broadcast, and SSID " wlan-navigation " and BSSID " 0000.2222.2222 " can be parsed
" wlan-navigation " and two kinds of corresponding relations of BSSID " 0000.5555.5555 ".If user selects to access SSID
The WLAN of " wlan-navigation ", then now STA can both access the frequency range that BSSID is " 0000.2222.2222 ", also may be used
To access BSSID as the frequency range of " 0000.5555.5555 ".Usually, STA tends to the preferable frequency range of selection signal intensity and connects
Enter, and the general signal intensity in identical place 2.4GHz frequency ranges is more than 5GHz, therefore STA can typically select to access BSSID
For the frequency range of " 0000.2222.2222 ".
According to the method for prior art, when STA is double frequency, the frequency range of 2.4GHz typically can be all accessed, so as to easily cause
2.4GHz frequency ranges it is crowded.
When the radio switch-in method provided using the present invention, AP first hides SSID in the Beacon frames of broadcast,
That is AP only includes BSSID " 0000.2222.2222 " in the Beacon frames of 2.4GHz multi-band broadcasts, and in 5GHz frequency ranges
Only include BSSID " 0000.5555.5555 " in the Beacon frames of broadcast.
For single-frequency STA of 2.4GHz frequency ranges is only supported in network, which is only capable of receiving AP wide in 2.4GHz frequency ranges
The Beacon for broadcasting, and therefrom parse BSSID " 0000.2222.2222 ", as STA does not obtain SSID, therefore STA also without
Method accesses WLAN.Now STA can only have found WLAN by way of active probe, therefore STA sends Probe in 2.4GHz frequency ranges
Request frames, are sky as STA is also not known by SSID in SSID, therefore Probe Request frames.AP is connect in 2.4GHz frequency ranges
After receiving Probe Request frames, because not also being identified to the type of STA, therefore first which is not replied, but
It is spaced the default time, such as 1 second, the Probe Request frames that now AP is not sent in 5GHz UHF band receptions to STA, therefore
AP determines single-frequency STA that STA is 2.4GHz.As STA does not receive the Probe Request frames of AP transmissions, therefore STA can be
2.4GHz frequency ranges resend Probe Request frames, and now AP can reply Probe Response frames in 2.4GHz frequency ranges, its
In indicate that SSID " wlan-navigation " is corresponding with BSSID " 0000.2222.2222 ".STA receives Probe Request
After frame, SSID " wlan-navigation " and BSSID " 0000.2222.2222 " is therefrom parsed, if user selects to access
WLANs of the SSID for " wlan-navigation ", then now STA can access the frequency range that BSSID is " 0000.2222.2222 ".
For single-frequency STA of 5GHz frequency ranges is only supported in network, which is only capable of receiving AP in 5GHz multi-band broadcasts
Beacon, and BSSID " 0000.5555.5555 " is therefrom parsed, as STA does not obtain SSID, therefore STA cannot also connect
Enter WLAN.Now STA can only have found WLAN by way of active probe, therefore STA sends Probe in 5GHz frequency ranges
Request frames, are sky as STA is also not known by SSID in SSID, therefore Probe Request frames.AP is in 5GHz UHF band receptions
To after Probe Request frames, because not also being identified to the type of STA, therefore first which is not replied, but
Every the default time, such as 1 second, the Probe Request frames that now AP is not sent in 2.4GHz UHF band receptions to STA, therefore
AP determines single-frequency STA that STA is 5GHz.As STA does not receive the Probe Request frames of AP transmissions, therefore STA can be
5GHz frequency ranges resend Probe Request frames, and now AP can reply Probe Response frames, its middle finger in 5GHz frequency ranges
Bright SSID " wlan-navigation " is corresponding with BSSID " 0000.5555.5555 ".STA receives Probe Request frames
Afterwards, SSID " wlan-navigation " and BSSID " 0000.5555.5555 " is therefrom parsed, if user selects to access SSID
For the WLAN of " wlan-navigation ", then now STA can access the frequency range that BSSID is " 0000.5555.5555 ".
For the double frequency STA of 2.4GHz and 5GHz is supported in network simultaneously, AP can be received simultaneously in 2.4GHz
Frequency range and the Beacon of 5GHz broadcast, and therefrom parse BSSID " 0000.2222.2222 " and BSSID
" 0000.5555.5555 ", as STA does not obtain SSID, therefore STA cannot also access WLAN.Now STA can only be by master
The mode of dynamic detection finds WLAN, therefore STA sends Probe Request frames in 2.4GHz frequency ranges, as STA is also not known by
In SSID, therefore Probe Request frames, SSID is sky；STA sends ProbeRequest frames in 5GHz frequency ranges simultaneously, due to
During STA is also not known by SSID, therefore Probe Request frames, SSID is sky.AP is arrived in 2.4GHz frequency ranges or 5GHz UHF band receptions
After Probe Request frames, because not also being identified to the type of STA, therefore first which is not replied, but interval
The default time, such as 1 second, the Probe that now AP can be sent to STA in 2.4GHz frequency ranges and 5GHz UHF band receptions simultaneously
Request frames, therefore AP determines that STA is while supporting the double frequency STA of 2.4GHz and 5GHz.AP need according to reply strategy to
STA sends Probe Response frames, replys strategy and is divided into three kinds of situations here.
First：Reply strategy preferential for 5GHz, then AP sends ProbeResponse frame, its middle finger to STA in 5GHz frequency ranges
Bright SSID " wlan-navigation " is corresponding with BSSID " 0000.5555.5555 ".And AP is not sent out to STA in 2.4GHz frequency ranges
Probe Response frames, AP is sent to receive STA again in the Probe Request frames that 2.4GHz sends, also do not enter to which
Row is replied.If user select access SSID for " wlan-navigation " WLAN, then now STA be only capable of access BSSID be
The frequency range of " 0000.5555.5555 ".
Second：Reply strategy preferential for 2.4GHz, then AP sends ProbeResponse frame to STA in 2.4GHz frequency ranges, its
In indicate that SSID " wlan-navigation " is corresponding with BSSID " 0000.2222.2222 ".And AP is not in 5GHz frequency ranges to STA
Probe Response frames are sent, AP receives STA again in the Probe Request frames that 5GHz sends, also which do not entered
Row is replied.If user selects to access WLANs of the SSID for " wlan-navigation ", now STA is only capable of accessing BSSID and is
The frequency range of " 0000.2222.2222 ".
Second：Strategy is replied for sky（Strategy is not replied）, then AP send out to STA in 2.4GHz frequency ranges and 5GHz frequency ranges
Probe Response frames are sent, wherein SSID " wlan-navigation " and BSSID are indicated in 2.4GHz frequency ranges
" 0000.2222.2222 " correspondence, indicates SSID " wlan-navigation " and BSSID in 5GHz frequency ranges
" 0000.5555.5555 " correspondence.If user selects to access WLANs of the SSID for " wlan-navigation ", now STA had been both
The frequency range that BSSID is " 0000.2222.2222 " can be accessed and can also access the frequency range that BSSID is " 0000.5555.5555 ".
Specifically chosen which frequency range of STA accesses WLAN, and depending on STA drivings itself, generally, it is strong that STA tends to selection signal
Spend preferable frequency range, i.e. BSSID and access for " 0000.2222.2222 ".
It should be noted that in AP reply strategy can be set in advance in it is in AP, or by AP according to
What the current load condition of each frequency ranges of WLAN determined in real time.
Can be seen that from above-mentioned specific embodiment in the radio switch-in method of prior art, when double frequency STA needs to access
The frequency range of access during WLAN, can only be selected by STA itself, and after the radio switch-in method that the present invention for adopting is provided, is basis
The frequency range that reply policy selection STA in AP is accessed, i.e., be controlled to the access frequency range of STA by device A P of network side, can
To realize the reasonable utilization of WLAN frequency resources, the load balancing of each frequency range is realized.
It should be noted that in the various embodiments described above, the Probe Request frames and AP that STA is sent to AP is sent to STA
Probe Response frames structure it is same as the prior art with the information for wherein including.
The structural representation of the WAP embodiment one that Fig. 3 is provided for the present invention, as shown in figure 3, the present embodiment
WAP includes：
Receiver module 31, for the probe request message that receiving terminal STA sends；
Processing module 32, for according to receiving the STA and send the frequency range determination that the probe request message is located
The type of STA, the type of the STA include the number of frequency bands that the STA is supported.
Sending module 33, disappears for sending the detection reply to the STA in corresponding band according to the type of the STA
Breath, so that the STA accesses the WLAN.
The wireless access of the present embodiment is used for the technical scheme for realizing embodiment of the method shown in Fig. 1, and which realizes principle and skill
Art effect is similar to, and here is omitted.
Further, in embodiment illustrated in fig. 3, processing module 32, if specifically for the AP only in a UHF band reception
To the probe request message that the STA sends, it is determined that the STA is single-frequency STA；If the AP is in N number of UHF band reception
To the probe request message that the STA sends, it is determined that the STA is N frequency STA, N>1.
Further, in embodiment illustrated in fig. 3, sending module 33, if determining that the STA is single-frequency specifically for the AP
STA, then the AP detection is sent to the STA in the frequency range for receiving the probe request message that the STA sends
Reply message, so that the STA accesses the WLAN in the frequency range for sending the probe request message；If the AP is true
The fixed STA is N frequency STA, then the AP is according to replying one or more frequency ranges of strategy in N number of frequency range to described
STA sends the detection and replies message so that the STA it is described receive it is described detect the frequency range that replies message in select one
It is individual to access the WLAN.
The structural representation of the WAP embodiment two that Fig. 4 is provided for the present invention, as shown in figure 4, the present embodiment
WAP also includes on the basis of Fig. 3：Reply policy module 34, for preset it is described reply strategy or according to institute
The load parameter for stating WLAN different frequency range is dynamically determined the reply strategy, and the strategy of replying includes the instruction AP
The detection is sent to the STA in one or more frequency ranges to reply message.
The structural representation of the WAP embodiment three that Fig. 5 is provided for the present invention, as shown in figure 5, the present embodiment
WAP also includes on the basis of Fig. 4：Broadcast module 35, for broadcasting beacon Beacon frames, in the Beacon frames
Not including service set SSID of AP places WLAN.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of radio switch-in method, it is characterised in that include：
Access point AP broadcasts beacon Beacon frames, the services set in the Beacon frames not including AP places WLAN
Mark SSID；
The probe request message that AP receiving terminals STA send；
The AP determines the type of the STA according to the frequency range for receiving the STA transmissions probe request message place, described
The type of STA includes the number of frequency bands that the STA is supported；
Wherein it is determined that the type of the STA, including：
If AP does not receive the Probe Request frames that STA is sent in other frequency ranges after Preset Time, AP determines the STA
For single-frequency STA；If AP after Preset Time other UHF band receptions arrived STA transmission Probe Request frames, AP according to
The frequency range sum of the Probe Request frames that STA sends is received, the type of STA is determined；
The AP sends the detection to the STA in corresponding band according to the type of the STA and replies message, so that described
STA accesses the WLAN.
2. method according to claim 1, it is characterised in that the AP is according to receiving the detection that the STA sends
The frequency range that request message is located determines the type of the STA, and the type of the STA includes the number of frequency bands that the STA is supported, bag
Include：
If the probe request message that the AP is only sent in a UHF band reception to the STA, it is determined that the STA is single
Frequency STA；
If the probe request message that the AP is sent in N number of UHF band reception to the STA, it is determined that the STA is N frequencies
STA, N>1.
3. method according to claim 1, it is characterised in that the AP according to the type of the STA corresponding band to
The STA sends the detection and replies message, so that the STA accesses the WLAN, including：
If the AP determines the STA for single-frequency STA, the AP disappears receiving the probe requests thereby that the STA sends
The frequency range of breath sends the detection to the STA and replies message, so that the STA is in the frequency range for sending the probe request message
Access the WLAN；
If the AP determines the STA for N frequency STA, the AP one or many according to reply strategy in N number of frequency range
Individual frequency range sends the detection to the STA and replies message, so that the STA receives what the detection was replied message described
One is selected in frequency range and accesses the WLAN.
4. method according to claim 3, it is characterised in that if the AP determines that the STA is N frequency STA, the AP
Reply message to the STA transmissions detection according to one or more frequency ranges of strategy in N number of frequency range are replied, so that
The STA is received in the frequency range for detecting and replying message before one access of selection WLAN, also described
Including：
The reply strategy or true according to the load parameter dynamic of the WLAN different frequency range is preset in the AP
The fixed reply strategy, the strategy of replying include that the instruction AP sends described to the STA in one or more frequency ranges
Detection is replied message.
5. a kind of wireless access point AP, it is characterised in that include：
Broadcast module, for broadcasting beacon Beacon frames, not including AP places WLAN in the Beacon frames
Service set SSID；
Receiver module, for the probe request message that receiving terminal STA sends；
Processing module, for the class for determining the STA according to the frequency range for receiving the STA transmissions probe request message place
Type, the type of the STA include the number of frequency bands that the STA is supported；
Wherein it is determined that the type of the STA, including：
If AP does not receive the Probe Request frames that STA is sent in other frequency ranges after Preset Time, AP determines the STA
For single-frequency STA；If AP after Preset Time other UHF band receptions arrived STA transmission Probe Request frames, AP according to
The frequency range sum of the Probe Request frames that STA sends is received, the type of STA is determined；
Sending module, replies message for sending the detection to the STA in corresponding band according to the type of the STA, with
The STA is made to access the WLAN.
6. WAP according to claim 5, it is characterised in that the processing module, if specifically for the AP
The probe request message for only sending in a UHF band reception to the STA, it is determined that the STA is single-frequency STA；If described
The probe request message that AP is sent in N number of UHF band reception to the STA, it is determined that the STA is N frequency STA, N>1.
7. WAP according to claim 5, it is characterised in that the sending module, if specifically for the AP
Determine that the STA is single-frequency STA, then the AP is receiving the frequency range of the probe request message that the STA sends to institute
State the STA transmissions detection to reply message, so that the STA is described wireless in the frequency range access for sending the probe request message
LAN；If the AP determines the STA for N frequency STA, the AP one according to reply strategy in N number of frequency range
Or multiple frequency ranges to the STA send it is described detection reply message so that the STA it is described receive it is described detection reply disappear
One is selected in the frequency range of breath and accesses the WLAN.
8. WAP according to claim 7, it is characterised in that also include：Policy module is replied, for presetting
State reply strategy or according to the load parameter of the WLAN different frequency range be dynamically determined it is described reply strategy, described time
Multiple strategy includes indicating that the AP in one or more frequency ranges sends the detection to the STA and replies message.
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Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104869644B (en) * | 2014-02-21 | 2019-02-05 | 华为技术有限公司 | A kind of data transmission method and equipment |
| CN105323826B (en) * | 2014-07-29 | 2019-04-05 | 中国移动通信集团公司 | A kind of method, access point and terminal accessing Wireless LAN |
| CN104302015A (en) * | 2014-09-15 | 2015-01-21 | 浙江生辉照明有限公司 | Adaptive WI-FI network connection method and system with hidden SSID |
| CN106162816B (en) * | 2015-03-31 | 2019-12-24 | 华为技术有限公司 | Network discovery method, station and access point |
| CN111093198B (en) * | 2015-07-23 | 2023-04-28 | 中移（杭州）信息技术有限公司 | Wireless local area network data transmission method and device |
| CN106028425A (en) * | 2016-05-05 | 2016-10-12 | 深圳Tcl数字技术有限公司 | Wireless communication connection control method and device |
| JP6622428B2 (en) * | 2016-05-31 | 2019-12-18 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Method for handover between access points and terminal equipment |
| WO2017206086A1 (en) * | 2016-05-31 | 2017-12-07 | 华为技术有限公司 | Access point discovery method and apparatus |
| CN106604303A (en) * | 2016-12-02 | 2017-04-26 | 中国科学院计算技术研究所 | Method and system for selecting usage frequency band of terminal, and access equipment |
| CN108235350B (en) * | 2018-03-09 | 2021-03-19 | 深圳市共进电子股份有限公司 | Wireless terminal identification method, device, equipment and storage medium |
| CN108668375A (en) * | 2018-03-23 | 2018-10-16 | 新华三技术有限公司 | A kind of cut-in method and device of wireless terminal |
| CN108834163B (en) * | 2018-06-29 | 2021-07-16 | 北京星网锐捷网络技术有限公司 | Method and device for distributed computation in wireless local area network |
| CN108834181A (en) * | 2018-08-01 | 2018-11-16 | 中电科航空电子有限公司 | The QoS method of airborne WIFI system based on 5G frequency range priority access |
| CN110839272A (en) * | 2018-08-15 | 2020-02-25 | 珠海市魅族科技有限公司 | Communication method and device of wireless local area network, access point equipment and site equipment |
| CN117279102A (en) * | 2018-08-31 | 2023-12-22 | 华为技术有限公司 | Method and device for transmitting information |
| CN111050335B (en) * | 2018-10-15 | 2023-11-07 | 珠海市魅族科技有限公司 | Wireless local area network communication method, access point and station |
| CN109600741B (en) * | 2018-12-04 | 2022-02-22 | 迈普通信技术股份有限公司 | System and method for identifying terminal capability in wireless local area network |
| CN109587734B (en) * | 2018-12-24 | 2021-11-09 | 普联技术有限公司 | Communication method and device of double-frequency repeater |
| CN111866813B (en) * | 2019-04-30 | 2024-04-19 | 瑞昱半导体股份有限公司 | Wireless connection setting and transmitting method |
| EP3989468A4 (en) * | 2019-06-20 | 2023-04-19 | Beijing Xiaomi Mobile Software Co., Ltd. | Receiving state feedback method and device |
| US20240089827A1 (en) * | 2019-10-11 | 2024-03-14 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and apparatus for processing basic service set identifier, and computer storage medium |
| CN114501589A (en) * | 2022-01-27 | 2022-05-13 | 阿里巴巴（中国）有限公司 | Wireless access method, wireless access point, terminal device and storage medium |
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| KR101467782B1 (en) * | 2008-02-25 | 2014-12-03 | 엘지전자 주식회사 | Method for supporting coexistence in a mobile station |
| CN102273099A (en) * | 2008-10-31 | 2011-12-07 | 英特尔公司 | Techniques for quick access channel information loading in wireless networks |
| CN102404794A (en) * | 2011-11-28 | 2012-04-04 | 福建星网锐捷网络有限公司 | Method, equipment and network for load balancing based on frequency band in wireless local area network |
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Address after: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee after: RUIJIE NETWORKS CO., LTD. Address before: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee before: Fujian Xingwangruijie Network Co., Ltd. |