CN104661323A - Wireless service establishment device and method in WLAN network - Google Patents
Wireless service establishment device and method in WLAN network Download PDFInfo
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- CN104661323A CN104661323A CN201310596470.4A CN201310596470A CN104661323A CN 104661323 A CN104661323 A CN 104661323A CN 201310596470 A CN201310596470 A CN 201310596470A CN 104661323 A CN104661323 A CN 104661323A
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- wireless terminal
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- association request
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
Abstract
The invention provides a wireless service establishment device and method in a WLAN network. The method comprises the following steps: assigning the same BSSID (Basic Service Set Identifier) to at least two APs (Access Points) by an AC (Access Controller), binding the same wireless service to radio frequency pair air interfaces of the APs; receiving an online association request which is transmitted by the AP and is scanned to a wireless terminal of the BSSID, judging whether the same wireless terminal transmits the same association request through at least two APs; if one AP exists, continuing to use one AP to respond the association request of the wireless terminal, and preventing other APs from responding to the association request of the wireless terminal; if at least two APs exist, determining one of the at least two APs to respond to the association request of the wireless terminal according to data message signal conditions sent by at least two APs, and preventing other APs from responding to the association request of the wireless terminal. According to the invention, the wireless terminal has zero packet loss when roaming in the AC, the business of the network equipment is not affected by roaming, and the input cost is low.
Description
Technical field
The present invention relates to the wlan network communications field, particularly relate to the wireless service apparatus for establishing in a kind of wlan network and method thereof.
Background technology
Wireless access point AP (Access Point) is a wireless transmitting-receiving equipments.Become wireless signal to send the data transaction received from cable network (such as Internet), convert the wireless signal received to data and be forwarded to cable network.Wireless network access controller AC(Access Controller) for completing functions such as the certification/configuration/data retransmissions of wireless user, play central controlled effect.Wireless access point control and supply CAPWAP (Control And Provisioning of Wireless AccessPoints Protocol Specification) provide general encapsulation and transmission mechanism for the communication between AP and AC.It is the standardization agreement that AC is used for managing and control AP uses.
Referring to Fig. 1, a wireless terminal in existing wlan network is associated with AP1, then is connected to AC by AP1.Described wireless terminal disconnection associates with AP1's, and the AP2 be connected with same wireless controller AC is associated, and the process that described wireless terminal is associated with AP2 is roaming in AC.In described AC, roaming can be divided into common roaming and fast roaming, and the time of common roaming comprises MAC layer certification, AP association, 802.1x user authentication, 4-Way Handshake; The fast roaming time comprises MAC layer certification, AP association, 4-Way Handshake.The time of fast roaming does not comprise 802.1x user authentication, and its roaming time is short, and therefore to roam in packet loss in roam procedure few than common for fast roaming.The technology of fast roaming is the PMKSA of buffer memory 802.1x authentication simultaneously on AP and wireless terminal, when roaming occurs, wireless terminal reaches 802.1x authentication object by the key providing a string PMK security association PMKSA (PMK SecurityAssociation) to AP and derive, and saves the network equipment and remote customer dialing authentication Radius(Remote Authentication Dial In User Service) server carries out needed for 802.1x authentication time.
To roam in packet loss in roam procedure few than common for fast roaming, more can ensure the continuity of business.If occur not abnormal in Fast roaming procedure, roaming time is about 50ms, will lose about 3 messages.But for the application of some high real-times, such as high fidelity speech, packet loss will make a big impact to service effectiveness.
In addition, because the wireless network card of different vendor's manufacture is in the condition difference judging whether to occur when roaming in AC, message interaction in AC in roaming is also variant, this successfully can not carry out fast roaming with regard to often causing the wireless network card of some manufacturers on wlan network equipment, and also the wireless network card of some manufacturer does not support fast roaming.Wlan network equipment wants the wireless network card of adaptive different vendor, and guarantee business does not affect by roaming, and input cost is very high.
Summary of the invention
In view of this, the invention provides the wireless service apparatus for establishing in a kind of wlan network and method thereof, it can realize zero packet loss when wireless terminal is roamed in AC, and the business of the network equipment does not affect by roaming, low in input cost.
The invention provides the wireless service method for building up in a kind of wlan network, be applied to wireless network access controller AC, described AC controls at least two wireless access point AP, and described method comprises:
Described AC distributes identical Basic Service Set BSSID and identifies to described at least two AP, same wireless service is tied to the radio frequency of AP to eating dishes without rice or wine;
The association request that the wireless terminal scanning described BSSID mark receiving described AP transmission is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions;
If only there is the identical association request that an AP sends, then continue to use a described AP to respond the association request of wireless terminal, and stop other AP to respond the association request of wireless terminal;
If there is the identical association request that at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
Further, the data message RST at least two AP described in basis of the present invention sent determines that an AP comprises:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP; Or
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determining AP.
Further, the method for the invention also comprises:
If wireless terminal by determining that RSSI and SNR of the data message that AP send diffuses out thresholding lower than keeper is default, then allows the data message other AP described sending described wireless terminal within the cycle;
The data message of the described wireless terminal of normal forwarding by former AP send, and abandon described data message after extracting RSSI and SNR of the data message that other AP send;
What as occurred in the cycle, RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, responds the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
Further, what RSSI and SNR of the present invention as the data message that AP new as described in the cycle send preset lower than keeper diffuses in thresholding, the data message of the described wireless terminal of normal forwarding by former AP send, and extract new AP send data message RSSI and SNR after abandon described air message.
Further, the method for the invention also comprises:
As described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, to the same wireless service of all bindings AP send configuration, allow all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
The present invention also provides the apparatus for establishing of the wireless service in a kind of wlan network, is applied to wireless network access controller AC, and described AC controls at least two wireless access point AP, and described device comprises:
Mark allocation units, identifying to described at least two AP for distributing identical Basic Service Set BSSID, same wireless service being tied to the radio frequency of AP to eating dishes without rice or wine;
Request judging unit, the association request that the wireless terminal scanning described BSSID mark sent for receiving described AP is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions;
First request-response unit, if for only there is the identical association request that an AP sends, then continues to use a described AP to respond the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal;
Second request-response unit, if for there is the identical association request that at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
Further, determine that an AP comprises according to the data message RST that described at least two AP send in the second request-response unit of the present invention:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP; Or
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determining AP.
Further, device of the present invention also comprises:
Roaming judging unit, if diffuse out thresholding by determining that RSSI and SNR of the data message that AP send presets lower than keeper for wireless terminal within the cycle, then allows the data message other AP described sending described wireless terminal;
Message repeating unit, for normally forwarding the data message of described wireless terminal by former AP send, and abandons described data message after extracting RSSI and SNR of the data message that other AP send;
Roaming determining unit, what within such as cycle, occur that RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, respond the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
Further, roaming determining unit of the present invention, that also presets lower than keeper for RSSI and SNR of the data message as AP new as described in the cycle send diffuses in thresholding, the data message of the described wireless terminal of normal forwarding by former AP send, and extract new AP send data message RSSI and SNR after abandon described air message.
Further, device of the present invention also comprises:
Terminal rolls off the production line unit, for as described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, the AP to the same wireless service of all bindings sends configuration, allows all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
From above technical scheme, the AP radio frequency that the present invention makes AC control the lower same wireless service of all bindings provides identical BSSID mark to eating dishes without rice or wine, wireless terminal scans BSSID mark and sends the association request of reaching the standard grade afterwards.For wireless terminal, because the BSSID mark scanned is identical, although it is that different AP by binding same wireless service send data message, sensation only accesses wlan network via an AP all the time.When wireless terminal occurs to roam in AC, determined which AP to receive the data message that wireless terminal send by by AC, select the AP sending data message without the need to wireless terminal.The data message of wireless terminal is determined after calculating by AC completely via which platform AP send.Because wireless terminal occurs to roam in AC, switch AP is transparent concerning wireless terminal, is uploaded by AC control data message, and data message is uploaded without interrupting, so just there is not problem and different vendor's wireless network card roaming compatibility issue of data packetloss.
Accompanying drawing explanation
The schematic diagram of roaming in existing AC in Fig. 1 wlan network;
The flow chart of Fig. 2 the inventive method;
The system construction drawing of Fig. 3 apparatus of the present invention.
Embodiment
The AP radio frequency that the present invention makes AC control the lower same wireless service of all bindings provides identical BSSID mark to eating dishes without rice or wine, wireless terminal scans BSSID mark and sends the association request of reaching the standard grade afterwards.For wireless terminal, because the BSSID mark scanned is identical, although it is that different AP by binding same wireless service send data message, sensation only accesses wlan network via an AP all the time.When wireless terminal occurs to roam in AC, when switching being sent the AP of data message, the AP that switches and wireless terminal is not needed to operate.The data message of wireless terminal is determined after calculating by AC completely via which platform AP send.Because wireless terminal occurs to roam in AC, switch AP is transparent concerning wireless terminal, is uploaded by AC control data message, and data message is uploaded without interrupting, so just there is not problem and different vendor's wireless network card roaming compatibility issue of data packetloss.
See Fig. 2, the present invention also provides the method for building up of the wireless service in a kind of wlan network, is applied to wireless network access controller AC, and described AC controls at least two wireless access point AP.Described method comprises step:
201, described AC distributes identical Basic Service Set BSSID and identifies to described at least two AP, same wireless service is tied to the radio frequency of AP to eating dishes without rice or wine.
Described basic service set identification BSSID is the one of SSID, refers to the unique identification that can generate a class MAC Address after radio frequency binds a wireless service, is used for the described wireless service indicated in eating dishes without rice or wine on described radio frequency.BSSID mark is for distinguishing different wireless networks, is namely used for distinguishing different wireless services.Just can enter different networks when AP is configured with different BSSID, and BSSID is broadcast out by AP usually, the wireless terminal scanning same BSSID could communication mutually.
202, the association request that the wireless terminal scanning described BSSID mark receiving described AP transmission is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions.
The AP of the same wireless service of described binding sends beacon frame Beacon message, all uses the identical BSSID mark of distributing.Beacon frame Beacon, the beacon that the phase of specifying sends, mobile workstation can be allowed to learn the existence of this wireless service, thus adjustment adds the necessary parameter of this network.
Wireless terminal scans the beacon frame Beacon message of BSSID mark, attempts reaching the standard grade, and send association request by the AP of the same wireless service of described binding on AC.Same wireless terminal likely send identical association request by the AP of at least two same wireless services of binding on AC.
If 203 only exist the identical association request that AP sends, then continue to use this AP to respond the association request of wireless terminal, and stop other AP to respond the association request of wireless terminal.
If the identical association request that 204 existence at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
From the above, for wireless terminal, because the BSSID mark scanned is identical, although it is that different AP by binding same wireless service send data message, sensation only accesses wlan network via an AP all the time.When wireless terminal occurs to roam in AC, when switching being sent the AP of data message, the data message of wireless terminal is determined after calculating by AC completely via which platform AP send.Data message is uploaded without interrupting, so just there is not problem and different vendor's wireless network card roaming compatibility issue of data packetloss.
Further, determine that an AP comprises according to the data message RST that described at least two AP send in described step 204:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP.
Further, determine that an AP comprises according to the data message RST that described at least two AP send in described step 204:
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determined AP.
In the present invention one specific embodiment, the quantity of the wireless terminal that described load is reached the standard grade by AP is weighed, and load balancing condition refer to described in the quantity of the wireless terminal of reaching the standard grade of each AP at least two AP close to (number differences of the wireless terminal of reaching the standard grade of each AP is less, and load is more balanced).Such as there is AP1 and AP2, the upper association of AP1 5 wireless terminals, the upper association of AP2 2 wireless terminals, if average signal strength RSSI and the signal to noise ratio snr of the data message that AP1 and AP2 send are more or less the same, namely selecting AP2 as determining AP, AP1 still associating 5 wireless terminals, the upper association of AP2 3 wireless terminals, the quantity of the wireless terminal that such guarantee AP1 with AP2 associates is more close, and the number differences of the wireless terminal of being reached the standard grade by AP1 and AP2 is less.
Further, described method also comprises:
If 205 wireless terminals by determining that RSSI and SNR of the data message that AP send diffuses out thresholding lower than keeper is default, then allow the data message other AP described sending described wireless terminal within the cycle of presetting.
If determine that the average signal strength RSSI of the data message that AP send and signal to noise ratio snr diffuse out thresholding lower than keeper is default, then showing that described wireless client may need to carry out roaming in AC, needing from determining that AP is switched to other AP.The described cycle is that keeper presets according to system requirements.
206, the data message of the described wireless terminal of normal forwarding by former AP send, and abandon described data message after extracting RSSI and SNR of the data message that other AP send.
Owing to now can not determine that described wireless client is the need of from determining that AP is switched to other AP, in order to prevent data message packet loss, the still data message of the described wireless terminal of normal forwarding by former AP send.But also extracting other AP send signal RSSI and SNR of data message to be confirmed whether to determine to need to carry out AP switching, but does not receive the data message by other AP send simultaneously.
What 207, as occurred in the cycle, RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, responds the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
If what occurred in the cycle that RSSI and SNR of the data message that an AP send preset higher than keeper diffuses in thresholding, show to determine to need to carry out AP switching, new AP responds the association request of wireless terminal, wireless terminal send data message by new AP on AC, stops other AP beyond new AP to respond the association request of wireless terminal.
What RSSI and SNR 208, as the data message that other AP as described in the cycle send preset lower than keeper diffuses in thresholding, returns step 206.
If what RSSI and SNR of the data message in the cycle, other AP described sent preset lower than keeper diffuses in thresholding, show not need to carry out AP switching, return step 206.
Described method also comprises:
As described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, to the same wireless service of all bindings AP send configuration, allow all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
Referring to Fig. 3, corresponding to said method, the present invention also provides the apparatus for establishing of the wireless service in a kind of wlan network, is applied to wireless network access controller AC, and described AC controls at least two wireless access point AP.Described AC comprises CPU, internal memory, nonvolatile memory and other hardware on hardware, and described device logically comprises:
Mark allocation units, identifying to described at least two AP for distributing identical Basic Service Set BSSID, same wireless service being tied to the radio frequency of AP to eating dishes without rice or wine.
Request judging unit, the association request that the wireless terminal scanning described BSSID mark sent for receiving described AP is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions.
First request-response unit, if for only there is the identical association request that an AP sends, then continues to use a described AP to respond the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
Second request-response unit, if for there is the identical association request that at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
Further, determine that an AP comprises according to the data message RST that described at least two AP send in described second request-response unit:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP; Or
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determining AP.
Further, described device also comprises:
Roaming judging unit, if diffuse out thresholding by determining that RSSI and SNR of the data message that AP send presets lower than keeper for wireless terminal within the cycle, then allows the data message other AP described sending described wireless terminal.
Message repeating unit, for normally forwarding the data message of described wireless terminal by former AP send, and abandons described data message after extracting RSSI and SNR of the data message that other AP send.
Roaming determining unit, what within such as cycle, occur that RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, respond the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
Further, described roaming determining unit, that also presets lower than keeper for RSSI and SNR of the data message as AP new as described in the cycle send diffuses in thresholding, the data message of the described wireless terminal of normal forwarding by former AP send, and extract new AP send data message RSSI and SNR after abandon described air message.
Further, described device also comprises:
Terminal rolls off the production line unit, for as described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, the AP to the same wireless service of all bindings sends configuration, allows all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
The present invention is further illustrated below with a concrete example.
AC control AP1 and AP2, makes wireless service 1 be tied to AP1 radio frequency, and AC issues configuration to AP1 increases wireless service 1, distributes BSSID1; Wireless service 1 is tied to AP2 radio frequency, and AC issues configuration to AP2 increases wireless service 1, distributes BSSID1; AP1 and AP2 outwards sends the Beacon message of wireless service 1, uses BSSID1.
The Beacon message that wireless terminal 1 scans BSSID1 is reached the standard grade, and association all asks to send AC by all AP receiving wireless terminal 1 request of reaching the standard grade.AC determines whether to send on AP1 and AP2 simultaneously after receiving wireless terminal 1 request of reaching the standard grade.
If only have on AP1 and send association request, continue to use AP1 to respond the request of reaching the standard grade, issue configuration simultaneously and stop AP2 to respond any message of above-mentioned wireless terminal 1.
If AP1 with AP2 all on send the request of associating, then according to the average signal strength RSSI of data message above sent and signal to noise ratio snr, select the AP of signal the best as determining AP.Suppose that the AP of signal the best is AP1, then AP1 responds the association request of wireless terminal 1, and stops AP2 to respond the association request of wireless terminal 1.
In AC measurement period, wireless terminal 1 diffuses out thresholding by RSSI and SNR that AP1 send whether lower than Administrator.If lower than diffusing out thresholding, then AC issues configuration to AP2, allow the data message that AP2 send wireless terminal 1 to send.
AC still normally forwards the air message of wireless terminal 1 by AP1 send.Abandon after RSSI and SNR information is then extracted by the air message that AP2 send for wireless terminal 1.
If wireless terminal leads to 1 RSSI and SNR crossing the air message that AP2 send and diffuses in thresholding higher than Administrator in the cycle, AC makes AP2 respond the association request of wireless terminal 1, and stops AP1 to respond the association request of wireless terminal 1.
If wireless terminal 1 diffuses in thresholding by RSSI and SNR of air message that AP2 send lower than Administrator in the cycle, then AC still normally forwards the air message of wireless terminal 1 by AP1 send.Abandon after RSSI and SNR information is then extracted by the air message that AP2 send for wireless terminal 1.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. the wireless service method for building up in wlan network, is characterized in that, is applied to wireless network access controller AC, and described AC controls at least two wireless access point AP, and described method comprises:
Described AC distributes identical Basic Service Set BSSID and identifies to described at least two AP, same wireless service is tied to the radio frequency of AP to eating dishes without rice or wine;
The association request that the wireless terminal scanning described BSSID mark receiving described AP transmission is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions;
If only there is the identical association request that an AP sends, then continue to use a described AP to respond the association request of wireless terminal, and stop other AP to respond the association request of wireless terminal;
If there is the identical association request that at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
2. method according to claim 1, is characterized in that, the data message RST that at least two AP described in described basis send determines that an AP comprises:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP; Or
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determining AP.
3. method according to claim 2, is characterized in that, described method also comprises:
If wireless terminal by determining that RSSI and SNR of the data message that AP send diffuses out thresholding lower than keeper is default, then allows the data message other AP described sending described wireless terminal within the cycle;
The data message of the described wireless terminal of normal forwarding by former AP send, and abandon described data message after extracting RSSI and SNR of the data message that other AP send;
What as occurred in the cycle, RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, responds the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
4. method according to claim 3, it is characterized in that, what RSSI and SNR as the data message that AP new as described in the cycle send preset lower than keeper diffuses in thresholding, the data message of the described wireless terminal of normal forwarding by former AP send, and extract new AP send data message RSSI and SNR after abandon described air message.
5. method according to claim 1, is characterized in that, described method also comprises:
As described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, to the same wireless service of all bindings AP send configuration, allow all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
6. the wireless service apparatus for establishing in wlan network, is characterized in that, is applied to wireless network access controller AC, and described AC controls at least two wireless access point AP, and described device comprises:
Mark allocation units, identifying to described at least two AP for distributing identical Basic Service Set BSSID, same wireless service being tied to the radio frequency of AP to eating dishes without rice or wine;
Request judging unit, the association request that the wireless terminal scanning described BSSID mark sent for receiving described AP is reached the standard grade, and judge whether to there is the identical association request of same wireless terminal by least two AP transmissions;
First request-response unit, if for only there is the identical association request that an AP sends, then continues to use a described AP to respond the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal;
Second request-response unit, if for there is the identical association request that at least two AP send, an AP at least two AP described in then determining according to the data message RST that described at least two AP send responds the association request of wireless terminal, and stops other AP to respond the association request of wireless terminal.
7. device according to claim 6, is characterized in that, determines that an AP comprises in described second request-response unit according to the data message RST that described at least two AP send:
According to average signal strength RSSI and the signal to noise ratio snr of the data message above sent, select the AP of signal the best as determining AP; Or
According to the average signal strength RSSI of the data message above sent and signal to noise ratio snr and load balancing condition, meeting under load balancing condition, selecting the AP of signal the best as determining AP.
8. device according to claim 7, is characterized in that, described device also comprises:
Roaming judging unit, if diffuse out thresholding by determining that RSSI and SNR of the data message that AP send presets lower than keeper for wireless terminal within the cycle, then allows the data message other AP described sending described wireless terminal;
Message repeating unit, for normally forwarding the data message of described wireless terminal by former AP send, and abandons described data message after extracting RSSI and SNR of the data message that other AP send;
Roaming determining unit, what within such as cycle, occur that RSSI and SNR of the data message that other AP send preset higher than keeper diffuses in thresholding, respond the association request of wireless terminal higher than the AP diffusing in thresholding, and stop former AP and other AP response wireless terminal associate request.
9. device according to claim 8, it is characterized in that, described roaming determining unit, that also presets lower than keeper for RSSI and SNR of the data message as AP new as described in the cycle send diffuses in thresholding, the data message of the described wireless terminal of normal forwarding by former AP send, and extract new AP send data message RSSI and SNR after abandon described air message.
10. device according to claim 6, is characterized in that, described device also comprises:
Terminal rolls off the production line unit, for as described in wireless terminal requests roll off the production line, delete described wireless terminal configurations, the AP to the same wireless service of all bindings sends configuration, allows all AP of the same wireless service of all bindings can respond the association request of wireless terminal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112492585A (en) * | 2020-11-13 | 2021-03-12 | 杭州迪普科技股份有限公司 | Method for connecting wireless terminal with wireless local area network and network system |
| CN113994743A (en) * | 2019-06-11 | 2022-01-28 | 高通股份有限公司 | Controlling transmit power across Basic Service Sets (BSSs) |
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| CN104661323B (en) | 2018-07-24 |
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