CN103167471B - Data transmission method when a kind of client moves between different AP and equipment - Google Patents
Data transmission method when a kind of client moves between different AP and equipment Download PDFInfo
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- CN103167471B CN103167471B CN201310080735.5A CN201310080735A CN103167471B CN 103167471 B CN103167471 B CN 103167471B CN 201310080735 A CN201310080735 A CN 201310080735A CN 103167471 B CN103167471 B CN 103167471B
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Abstract
The invention discloses data transmission method when a kind of client moves between different AP and equipment, the method includes: when client is moved to the 2nd AP overlay area by an AP overlay area, and client is when an AP does not roams into two AP, client corresponding informance is sent to the 2nd AP by the first message by AC；2nd AP utilizes the BSSID of an AP to replace the BSSID of self, and sends the second message to AC, carries the MAC Address of the 2nd AP, the MAC Address of client in described second message；Described second message, after receiving the second message, is sent to a described AP by described AC.In the embodiment of the present invention, the communication quality of client can be improved, and improve the wireless experience of user.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of client at different AP(Access Point,
Access point) between data transmission method when moving and equipment.
Background technology
As depicted in figs. 1 and 2, for WLAN(Wireless Local Area Network, WLAN)
In, AC(Access Controller, access controller)+FIT(is thin) the networking schematic diagram of AP, STA
(client) is connected to AC by AP；During client access network, needs first look for can
With network, then determine to select which AP to be connected to AC from according to some factor (such as signal strength signal intensity).
Due to the mobility of client, client after successful connection it may happen that position is moved, as from
Position shown in Fig. 1 moves to the position shown in Fig. 2, and now client is in the working range of AP C, but
It is that this client is but connected on AP A；In the case of above-mentioned, (i.e. do not overflow if client roams
Swim over to AP C), and client continues to be connected on AP A, then the communication quality of client can be caused by very
Big impact, it is understood that there may be a large amount of phenomenons such as packet loss, re-transmission, and cause very poor wireless experience.
Summary of the invention
The data transmission method when embodiment of the present invention provides a kind of client to move between different AP and
Equipment, to improve the communication quality of client, and improves the wireless experience of user.
In order to achieve the above object, the embodiment of the present invention provides a kind of client between diverse access point AP
Data transmission method time mobile, be applied to include access controller AC, an AP, the 2nd AP and
In the WLAN WLAN of client, a described AP provides service for being initially described client
AP, the method includes:
Described AC utilizes described client received signal strength indicator RSSI and second under an AP
RSSI under AP determines that described client is moved to the 2nd AP overlay area by an AP overlay area；
When described client does not roams into described two AP from a described AP, described AC passes through
For notifying that the 2nd AP provides the first message of service to be sent by described client corresponding informance for client
To described 2nd AP, described client corresponding informance includes: the medium access control MAC of described client
The basic clothes that on address, the MAC Address of a described AP, a described AP, described client is corresponding
Business set identifier BSSID；Described first message is used for making described 2nd AP utilize described client corresponding informance
In BSSID replace self a BSSID, and utilize the MAC Address of described client and described
Data from described client are sent to a described AP by the MAC Address of the oneth AP；
Described AC receives described 2nd AP and notifies that described 2nd AP can to being used for of sending of described AC
Second message of service is provided for described client, described second message is carried described 2nd AP's
MAC Address, the MAC Address of described client；
Described second message, after receiving described second message, is sent to a described AP by described AC；
Described second message is for making a described AP utilize the MAC Address of described 2nd AP and described client
The data being sent to described client are transmitted to described 2nd AP by the MAC Address of end.
Described AC utilizes described client received signal strength indicator RSSI and second under an AP
RSSI under AP determines that described client is moved to the 2nd AP overlay area by an AP overlay area,
Specifically include:
Described AC obtains described client RSSI under an AP and the RSSI under the 2nd AP, the
RSSI under one AP is the mean value of the RSSI of nearest N1 the record of a described AP, the 2nd AP
Under the mean value of RSSI that RSSI is nearest N2 the record of described 2nd AP；
As described client RSSI under an AP and described client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding time, described AC determines that described client is covered by a described AP
Cover region territory moves to described 2nd AP overlay area.
Before described client corresponding informance is sent to described 2nd AP by the first message by described AC,
Described method farther includes:
Described AC judges whether the data retransmission rate between a described AP and described client is more than or equal to
Preset retransmission rate thresholding, and described client did not the most carry out AP switching within Preset Time；
If data retransmission rate is more than or equal to presetting retransmission rate thresholding, and does not carry out within Preset Time
Crossing AP switching, the most described AC performs to send the step of the first message to described 2nd AP.
Described 2nd AP utilizes the BSSID in described client corresponding informance to replace self one
BSSID, specifically includes:
When the N article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP
Time, described 2nd AP utilizes the BSSID of a described AP to replace the N article BSSID of self；
When the N article BSSID of described 2nd AP correspondence radio frequency is replaced by the BSSID of other AP, and
When the N-1 article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP,
Described 2nd AP utilizes the BSSID of a described AP to replace the N-1 article BSSID of self；
By that analogy.
When a described AP is initially the offer service of described client, described AC records described client
Following corresponding relation: on the ID of a described AP, a described AP, described client is corresponding
BSSID, the MAC Address of a described AP, the MAC Address of described client, described client
The information of AP switching whether was carried out within Preset Time；
Described AC is after receiving described second message, and the corresponding relation updating described client is: described
BSSID that on the ID of the oneth AP, a described AP, described client is corresponding, described 2nd AP
Whether MAC Address, the MAC Address of described client, described client are carried out within Preset Time
Cross the information of AP switching.
A described AP utilizes MAC Address and the MAC Address of described client of described 2nd AP
The data being sent to described client are transmitted to the process of described 2nd AP, specifically include: described first
AP adds the first heading before the data, and the data carrying the first heading are sent to described second
AP, is removed described first heading by described 2nd AP, and amended data is sent to described visitor
Family end；Wherein, the target MAC (Media Access Control) address of described first heading is the MAC Address of described 2nd AP,
Source MAC is the MAC Address of a described AP；
Described 2nd AP utilizes MAC Address and the MAC Address of a described AP of described client
Data from described client are sent to the process of a described AP, specifically include: described second
AP adds the second heading before the data, and the data carrying the second heading are sent to described first
AP, is removed described second heading by a described AP, and amended data are sent to purpose set
Standby；Wherein, the target MAC (Media Access Control) address of described second heading is the MAC Address of a described AP,
Source MAC is the MAC Address of described 2nd AP.
The embodiment of the present invention provides a kind of access controller AC, is applied to include described AC, the first access
In the WLAN WLAN of some AP, the 2nd AP and client, a described AP is for being initially
Stating client provides the AP, described AC of service to include:
Determine module, for utilizing client received signal strength indicator RSSI under an AP and the
RSSI under two AP determines that client is moved to the 2nd AP overlay area by an AP overlay area；
First sending module, for when determining that client is moved to the 2nd AP by an AP overlay area and covers
Cover region territory and described client, not when a described AP roams into described two AP, are led to by being used for
Know that the 2nd AP provides the first message of service to be sent to by described client corresponding informance for client described
2nd AP, described client corresponding informance includes: the medium access control MAC Address of described client,
The Basic Service Set mark that on the MAC Address of a described AP, a described AP, described client is corresponding
Know BSSID；Described first message is for making the 2nd AP utilize the BSSID in described client corresponding informance
Replace the BSSID of self, and utilize the MAC Address of described client and a described AP
Data from described client are sent to a described AP by MAC Address；
Receiver module, notifies described 2nd AP for receiving described 2nd AP to being used for of sending of this AC
Second message of service can be provided for described client, described second message is carried described 2nd AP's
MAC Address, the MAC Address of described client；
Second sending module, for after receiving described second message, is sent to institute by described second message
State an AP；Described second message utilizes the MAC Address of described 2nd AP for making a described AP
With the MAC Address of described client, the data being sent to described client are transmitted to described 2nd AP.
Described determine module, specifically for obtaining the described client RSSI under an AP and the 2nd AP
Under RSSI average that RSSI, the RSSI under an AP are nearest N1 the record of a described AP
Value, the RSSI under the 2nd AP is the mean value of the RSSI of nearest N2 the record of described 2nd AP；
As described client RSSI under an AP and described client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding time, determine described client by described oneth AP overlay area move
Move described 2nd AP overlay area.
Described first sending module, is further used for judging the number between a described AP and described client
According to retransmission rate whether more than or equal to presetting retransmission rate thresholding, and described client within Preset Time whether
Do not carried out AP switching；If data retransmission rate is more than or equal to presetting retransmission rate thresholding, and when default
Do not carried out AP switching between, then perform to send the first message to described 2nd AP.
Also include: maintenance module, be used for when a described AP is initially the offer service of described client,
Record the following corresponding relation of described client: described visitor on the ID of a described AP, a described AP
BSSID that family end is corresponding, the MAC Address of a described AP, the MAC Address of described client,
Whether described client carried out the information of AP switching within Preset Time；
After receiving the second message, the corresponding relation updating described client is: the ID of a described AP,
BSSID that on a described AP, described client is corresponding, the MAC Address of described 2nd AP, described
Whether the MAC Address of client, described client carried out the information of AP switching within Preset Time.
The embodiment of the present invention provides a kind of access point AP, is applied to include access controller as the 2nd AP
In the WLAN WLAN of AC, an AP, described 2nd AP and client, a described AP
The AP, described 2nd AP that there is provided service for being initially described client include:
Receiver module, for receive from described AC be used for notify the 2nd AP for client provide service
The first message, described first message carries described client corresponding informance, and described client pair
Information is answered to include: the medium access control MAC Address of described client, the MAC of a described AP
Basic service set identification BSSID that on address, a described AP, described client is corresponding；Wherein, institute
Stating the first message is that described AC is moved to the 2nd AP overlay area in client by an AP overlay area,
And client not transmission when an AP roams into two AP；
Processing module, for utilizing the BSSID that on a described AP, described client is corresponding to replace self
A BSSID；
Sending module, for sending for notifying that this equipment can provide service for client to described AC
Second message, carries the MAC ground of the MAC Address of the 2nd AP, described client in this second message
Location；By described AC, described second message is sent to a described AP；And described second message is used for making
A described AP utilizes the MAC Address of described 2nd AP and the MAC Address of described client to send out
The data giving described client are transmitted to this 2nd AP；Utilize MAC Address and the institute of described client
Data from described client are sent to a described AP by the MAC Address stating an AP.
Described processing module, specifically for the N article BSSID when this equipment correspondence radio frequency not by other
When the BSSID of AP replaces, the BSSID of a described AP is utilized to replace the N article BSSID of self；
When the N article BSSID of this equipment correspondence radio frequency is replaced by the BSSID of other AP, and this equipment is corresponding
When the N-1 article BSSID of radio frequency is not replaced by the BSSID of other AP, utilize a described AP
BSSID replace self the N-1 article BSSID；By that analogy.
Compared with prior art, the embodiment of the present invention at least has the advantage that in the embodiment of the present invention,
When client is moved to the 2nd AP overlay area by an AP overlay area, and client does not roam into
During two AP, service can be provided by the 2nd AP for client, so that client can be all the time
Connect and access the preferable AP of signal, improve the communication quality of client, and improve the wireless experience of user.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the networking schematic diagram of AC+FIT AP in prior art；
Fig. 3 is a kind of client that the embodiment of the present invention provides data transmission when moving between different AP
Method flow schematic diagram；
Fig. 4 and Fig. 5 is the form schematic diagram of the first message and the second message in the embodiment of the present invention；
Fig. 6 is the structural representation of a kind of AC that the embodiment of the present invention provides；
Fig. 7 is the structural representation of a kind of AP that the embodiment of the present invention provides.
Detailed description of the invention
For problems of the prior art, the embodiment of the present invention provide a kind of client different AP it
Between data transmission method when moving, the method can apply to include AC, an AP, the 2nd AP
With in the WLAN of client；Wherein, an AP provides the AP of service for being initially client, should
2nd AP is the AP that client moves corresponding to rear region.
Application scenarios with Fig. 1 and Fig. 2 as the embodiment of the present invention, AP includes AP A, AP B, AP C
With AP D, and AP A, AP B, AP C and AP D have been added to an AP GROUP(group)
In, the AP in AP GROUP, all in an identical network, can pass through double layer network intercommunication each other.
Assume in AP GROUP, during client First Contact Connections, be linked on AP A that (AP A exists
It is initially client in this AP GROUP and service is provided), client is after successful connection, from shown in Fig. 1
Position move to shown in Fig. 2 position time, an AP is AP A, and the 2nd AP is AP C.
In the embodiment of the present invention, when an AP is initially client offer service, when client first time
When being linked into an AP, AC needs record following information corresponding to client:
APID: client initially connects the ID of AP, the ID of the i.e. the oneth AP；
The BSSID(Basic Service Set Identification that BSSID: client initially connects, substantially
Service set), the BSSID(that on the i.e. the oneth AP, described client is corresponding is actually an AP
MAC Address)；
AP0-MAC: client connects MAC Address (Media Access Control, the medium visit of AP
Ask control), initial value is the MAC Address initially connecting AP, the MAC Address of the i.e. the oneth AP；
The MAC Address of STA-MAC: client；
STA-AID:AP is the AID(connection identifier of client distribution)；
S:1bit, indicates whether encryption, and 1 is yes, and 0 is no；
C:1bit, represents whether client carried out AP switching within Preset Time (Time0)；As
Really client carried out within Time0 AP switching (i.e. performed described in the embodiment of the present invention technology behaviour
Make), then it is set to 0；If client did not carry out AP switching within Time0, then it is set to 1；Its
In, Time0 is the time gate limit value of systemic presupposition, and effect is to prevent client from closing on AP's at two
Region switches repeatedly；It is 0 when client is initially accessed, after waiting Time0, is set to 1.
Based on above-mentioned application scenarios, as it is shown on figure 3, the method comprises the following steps:
Step 301, AC utilizes client RSSI(Receive Signal Strength under an AP
Indicator, received signal strength indicator) and the 2nd AP under RSSI determine that client is covered by an AP
Cover region territory moves to the 2nd AP overlay area, as moved to the position shown in Fig. 2 from the position shown in Fig. 1.
In the embodiment of the present invention, AC determines that client is moved to the 2nd AP by an AP overlay area and covers
The process in cover region territory specifically includes: AC obtains client RSSI(the such as the oneth AP under an AP and leads to
Cross original LWAPP(Light Weight Access Point Protocol, Lightweight Access Point Protocol) flow process lead to
Know to AC) and client RSSI(the such as the 2nd AP under the 2nd AP by original LWAPP flow process
Notice is to AC), the RSSI under an AP is an AP nearest N1 time, and (such as 3 times) records
The mean value of the RSSI of client, the RSSI under the 2nd AP is that nearest N2 time of the 2nd AP is (such as 3
Secondary) mean value of the RSSI of client that records；Based on client RSSI and under an AP
RSSI under two AP, as client RSSI under an AP and client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding (this default RSSI thresholding be system definition fixed value) time,
AC determines that client is moved to the 2nd AP overlay area by an AP overlay area.
Step 302, the data not roaming into the 2nd i.e. client of AP(from an AP when client are led to
Cross an AP to forward) time, by the first message, (the first message is used for notifying that the 2nd AP is client AC
End provides service) client corresponding informance is sent to the 2nd AP；This client corresponding informance include but not
It is limited to: on the MAC Address of client, the MAC Address of an AP, an AP, client is corresponding
BSSID.
In a kind of preferred embodiment of the embodiment of the present invention, not do not roam into the from an AP in client
During two AP, only the data retransmission rate between an AP and client is more than or equal to presetting retransmission rate door
Limit (fixed value that this default retransmission rate thresholding is system definition), and client does not has within Preset Time
When carrying out AP switching, client corresponding informance just can be sent to the 2nd AP by the first message by AC；
Otherwise, AC need not, by the first message, client corresponding informance is sent to the 2nd AP.
In the embodiment of the present invention, this first message is for making the 2nd AP utilize in client corresponding informance
BSSID replaces the BSSID of self, and utilizes MAC Address and the MAC of an AP of client
Data from client are sent to an AP by address.
Step 303, the 2nd AP utilizes the BSSID that on an AP, client is corresponding to replace self
BSSID, and (the second message is used for notifying that this equipment can provide for client to send the second message to AC
Service), this second message carries the MAC Address of the 2nd AP, the MAC Address of client.
In the embodiment of the present invention, this second message utilizes the MAC Address of the 2nd AP for making an AP
With the MAC Address of client, the data being sent to client are transmitted to the 2nd AP
In the preferred embodiment of the embodiment of the present invention, the 2nd AP utilizes client on an AP corresponding
BSSID replaces the BSSID of self, specifically includes: when the N article of the 2nd AP correspondence radio frequency is (as
Latter one) BSSID not by other AP BSSID replace time, the 2nd AP utilizes an AP's
BSSID replaces the N article BSSID of self；When the N article BSSID of the 2nd AP correspondence radio frequency is by it
The BSSID of its AP replaces, and the N-1 article BSSID of the 2nd AP correspondence radio frequency be not by other AP
BSSID replace time, the 2nd AP utilizes the BSSID of an AP to replace the N-1 article BSSID of self；
When the N-1 article BSSID of the 2nd AP correspondence radio frequency is replaced by the BSSID of other AP, and the 2nd AP
When the N-2 article BSSID of corresponding radio frequency is not replaced by the BSSID of other AP, the 2nd AP utilizes
The BSSID of the oneth AP replaces the N-2 article BSSID of self；By that analogy, follow-up no longer go to live in the household of one's in-laws on getting married
State.
In the embodiment of the present invention, the first message (being used for notifying that the 2nd AP provides service for client) and the
The form of two message (being used for notifying that this equipment can provide service for client) is as shown in Figure 4 and Figure 5.
In the first message, Message Type(type of message) it is self-defined message type；(E0) word
Carry AC in Duan to notify to the message content (i.e. the STA corresponding informance of AC record) of the 2nd AP；
2nd AP, after receiving the first message, needs to respond this first message, and receives the response
Message Type is T0(failure) or T(success), if Message Type is T0, then Msg
In Element, content is empty, if Message Type is T, then receiveing the response is the second message.
It is failure (being used for notifying that this equipment can not provide service for client) that 2nd AP is receiveed the response
Situation includes: (1) the 2nd AP is after receiving the first message, if checking the client comprised in the first message
End corresponding informance is not the client that the RSSI self detected meets addition condition, the most directly abandon this
One message, and middle Message Type of receiveing the response is failure；(2) the 2nd AP are utilizing an AP's
When BSSID replaces the BSSID of self, if N article (the last item) of the 2nd AP correspondence radio frequency arrives
The N-3 article BSSID is the most replaced by the BSSID of other AP, then the 2nd AP does not recycle first
The BSSID of AP replaces the BSSID of self, and middle Message Type of receiveing the response is failure.
In the second message, Message Type is self-defined message type；(E) is carried in field
Two AP notify to message content (MAC Address of the i.e. the 2nd AP, the MAC ground of client of AC
Location)；AC, after receiving this second message, needs to respond this second message, and receives the response
Middle Message Type is T, and in Msg Element, content is empty.
Step 304, the second message, after receiving the second message, is sent to an AP by AC, and by
One AP determines that this equipment needs the data being sent to client are sent to the 2nd AP.
Concrete, AC is after receiving the second message, knowing how the MAC of the AP carried in the second message
Address (such as the MAC Address of the 2nd AP) is not that the MAC Address of the AP of record on AC is (such as the
The MAC Address of one AP), then updating client corresponding informance is: the ID(of an AP becomes
Change), the BSSID(of an AP do not changes), the MAC Address of the 2nd AP (change,
The MAC Address using the 2nd AP replaces the original value of AP0-MAC), the MAC Address of client (not
Change), client whether carried out within Preset Time AP switching information (be now default
AP switching was carried out, for not carrying out within Preset Time after waiting Preset Time within time
AP switches), and the second message is sent to an AP；Otherwise, AC directly abandons the second message.
Based on above-mentioned process, for the data transmission procedure of client, the method can also include:
Step 305, an AP, after receiving the data being sent to client, sends the data to second
AP, is sent the data to client by the 2nd AP；And/or, the 2nd AP is receiving from client
After data, send the data to an AP, an AP send the data to purpose equipment.
In the embodiment of the present invention, an AP sends the data to the 2nd AP, the 2nd AP data sent out
Give client, specifically include: an AP adds the first heading before the data, and will carry first
The data of heading are sent to the 2nd AP, the 2nd AP remove the first heading, and by amended number
According to being sent to client；Wherein, the target MAC (Media Access Control) address of this first heading is the MAC of the 2nd AP
Address, source MAC is the MAC Address of an AP.
In the embodiment of the present invention, the 2nd AP sends the data to an AP, an AP data sent out
Give purpose equipment, specifically include: the 2nd AP adds the second heading before the data, and will carry
The data of two headings are sent to an AP, an AP remove the second heading, and by amended
Data are sent to purpose equipment；Wherein, the target MAC (Media Access Control) address of this second heading is an AP's
MAC Address, source MAC is the MAC Address of the 2nd AP.
Under the application scenarios shown in Fig. 1 and Fig. 2, when client is moved to AP D by AP C overlay area
During overlay area, this AP D can carry out relevant treatment, the most now AP D according to the handling process of AP C
Being the 2nd AP, it is no longer repeated at this for respective handling process.
Based on the inventive concept as said method, the embodiment of the present invention additionally provides a kind of access and controls
Device AC processed, is applied to include described AC, the first access point AP, the 2nd AP and the wireless office of client
In the net WLAN of territory, a described AP provides the AP of service for being initially described client, such as Fig. 6
Shown in, described AC includes:
Determine module 11, for utilize client received signal strength indicator RSSI under an AP and
RSSI under 2nd AP determines that client is moved to the 2nd AP overlay area by an AP overlay area；
First sending module 12, for when determining that client is moved to the 2nd AP by an AP overlay area
Overlay area and described client are when a described AP does not roams into described two AP, by being used for
Notify that the 2nd AP provides the first message of service that described client corresponding informance is sent to institute for client
Stating the 2nd AP, described client corresponding informance includes: the medium access control MAC ground of described client
The basic service that on location, the MAC Address of a described AP, a described AP, described client is corresponding
Set identifier BSSID；Described first message is for making the 2nd AP utilize in described client corresponding informance
BSSID replaces the BSSID of self, utilizes the MAC Address of described client and a described AP
MAC Address the data from described client are sent to a described AP；
Receiver module 13, notifies described second for receiving described 2nd AP to being used for of sending of this AC
AP can provide the second message of service for described client, carries described second in described second message
The MAC Address of AP, the MAC Address of described client；
Second sending module 14, for after receiving described second message, is sent to described by the second message
Oneth AP；Described second message for make a described AP utilize described 2nd AP MAC Address and
The data being sent to described client are transmitted to described 2nd AP by the MAC Address of described client.
Described determine module 11, specifically for obtaining described client RSSI and second under an AP
RSSI under AP, the RSSI under an AP are the RSSI of nearest N1 the record of a described AP
Mean value, the RSSI under the 2nd AP is the mean value of the RSSI of nearest N2 the record of described 2nd AP；
As described client RSSI under an AP and described client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding time, determine described client by described oneth AP overlay area move
Move described 2nd AP overlay area.
Described first sending module 12, is further used for judging between a described AP and described client
Data retransmission rate whether more than or equal to presetting retransmission rate thresholding, and described client is within Preset Time
The most do not carried out AP switching；If data retransmission rate is more than or equal to presetting retransmission rate thresholding, and in advance
If not carrying out AP switching within the time, then perform to send the first message to described 2nd AP.
Described AC also includes: maintenance module 15, for being initially described client at a described AP
When service is provided, record the following corresponding relation of described client: the ID of a described AP, described the
BSSID that on one AP, described client is corresponding, the MAC Address of a described AP, described client
MAC Address, described client whether carried out within Preset Time AP switching information；
After receiving the second message, the corresponding relation updating described client is: the ID of a described AP,
BSSID that on a described AP, described client is corresponding, the MAC Address of described 2nd AP, described
Whether the MAC Address of client, described client carried out the information of AP switching within Preset Time.
Wherein, the modules of apparatus of the present invention can be integrated in one, it is also possible to separates and disposes.Above-mentioned
Module can merge into a module, it is also possible to is further split into multiple submodule.
Based on the inventive concept as said method, the embodiment of the present invention additionally provides a kind of access point
AP, is applied to include access controller AC, an AP, described 2nd AP and visitor as the 2nd AP
In the WLAN WLAN of family end, a described AP provides service for being initially described client
AP, as it is shown in fig. 7, described 2nd AP includes:
Receiver module 21, for receive from described AC be used for notify the 2nd AP for client provide
First message of service, carries described client corresponding informance, and described client in described first message
End corresponding informance includes: the medium access control MAC Address of described client, a described AP
Basic service set identification BSSID that on MAC Address, a described AP, described client is corresponding；Wherein,
Described first message is that described AC is moved to the 2nd AP area of coverage in client by an AP overlay area
Territory, and client not transmission when an AP roams into two AP；
Processing module 22, for utilizing the BSSID that on a described AP, described client is corresponding to replace certainly
One BSSID of body；
Sending module 23, is used for notifying that this equipment can provide clothes for client for sending to described AC
Second message of business, carries the MAC Address of the 2nd AP, the MAC of described client in this second message
Address；By described AC, described second message is sent to a described AP；And described second message is used for
A described AP is made to utilize the MAC Address of described 2nd AP and the MAC Address of described client to incite somebody to action
The data being sent to described client are transmitted to this 2nd AP；Utilize described client MAC Address and
Data from described client are sent to a described AP by the MAC Address of a described AP.
Described processing module 22, specifically for the N article BSSID when this equipment correspondence radio frequency not by it
When the BSSID of its AP replaces, the BSSID of a described AP is utilized to replace the N article BSSID of self；
When the N article BSSID of this equipment correspondence radio frequency is replaced by the BSSID of other AP, and this equipment is corresponding
When the N-1 article BSSID of radio frequency is not replaced by the BSSID of other AP, utilize a described AP
BSSID replace self the N-1 article BSSID；By that analogy.
Wherein, the modules of apparatus of the present invention can be integrated in one, it is also possible to separates and disposes.Above-mentioned
Module can merge into a module, it is also possible to is further split into multiple submodule.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive this
Invention can add the mode of required general hardware platform by software and realize, naturally it is also possible to by firmly
Part, but a lot of in the case of the former is more preferably embodiment.Based on such understanding, the skill of the present invention
The part that prior art is contributed by art scheme the most in other words can be with the form body of software product
Revealing to come, this computer software product is stored in a storage medium, including some instructions in order to make
Obtain a computer equipment (can be personal computer, server, or the network equipment etc.) to perform
Method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, in accompanying drawing
Module or flow process not necessarily implement necessary to the present invention.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be retouched according to embodiment
State in the device carrying out being distributed in embodiment, it is also possible to carry out respective change and be disposed other than the present embodiment
One or more devices in.The module of above-described embodiment can merge into a module, it is also possible to enters
One step splits into multiple submodule.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The several specific embodiments being only the present invention disclosed above, but, the present invention is not limited to
This, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. data transmission method when client moves between diverse access point AP, is applied to bag
Include in the WLAN WLAN of access controller AC, an AP, the 2nd AP and client, institute
State an AP and the AP of service be provided for being initially described client, it is characterised in that the method includes:
Described AC utilizes described client received signal strength indicator RSSI and second under an AP
RSSI under AP determines that described client is moved to the 2nd AP overlay area by an AP overlay area；
When described client does not roams into described two AP from a described AP, described AC passes through
For notifying that the 2nd AP provides the first message of service to be sent by described client corresponding informance for client
To described 2nd AP, described client corresponding informance includes: the medium access control MAC of described client
The basic clothes that on address, the MAC Address of a described AP, a described AP, described client is corresponding
Business set identifier BSSID；Described first message is used for making described 2nd AP utilize described client corresponding informance
In BSSID replace self a BSSID, and utilize the MAC Address of described client and described
Data from described client are sent to a described AP by the MAC Address of the oneth AP；
Described AC receives described 2nd AP and notifies that described 2nd AP can to being used for of sending of described AC
Second message of service is provided for described client, described second message is carried described 2nd AP's
MAC Address, the MAC Address of described client；
Described second message, after receiving described second message, is sent to a described AP by described AC；
Described second message is for making a described AP utilize the MAC Address of described 2nd AP and described client
The data being sent to described client are transmitted to described 2nd AP by the MAC Address of end；
Wherein, described AC utilizes described client received signal strength indicator RSSI under an AP
Determine that described client is moved to the 2nd AP by an AP overlay area and covers with the RSSI under the 2nd AP
Cover region territory, specifically includes:
Described AC obtains described client RSSI under an AP and the RSSI under the 2nd AP, the
RSSI under one AP is the mean value of the RSSI of nearest N1 the record of a described AP, the 2nd AP
Under the mean value of RSSI that RSSI is nearest N2 the record of described 2nd AP；
As described client RSSI under an AP and described client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding time, described AC determines that described client is covered by a described AP
Cover region territory moves to described 2nd AP overlay area；
Wherein, described 2nd AP utilizes the BSSID in described client corresponding informance to replace self
Individual BSSID, specifically includes:
When the N article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP
Time, described 2nd AP utilizes the BSSID of a described AP to replace the N article BSSID of self；
When the N article BSSID of described 2nd AP correspondence radio frequency is replaced by the BSSID of other AP, and
When the N-1 article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP,
Described 2nd AP utilizes the BSSID of a described AP to replace the N-1 article BSSID of self；
By that analogy.
2. the method for claim 1, it is characterised in that described AC passes through the first message by institute
Stating before client corresponding informance is sent to described 2nd AP, described method farther includes:
Described AC judges whether the data retransmission rate between a described AP and described client is more than or equal to
Preset retransmission rate thresholding, and described client did not the most carry out AP switching within Preset Time；
If data retransmission rate is more than or equal to presetting retransmission rate thresholding, and does not carry out within Preset Time
Crossing AP switching, the most described AC performs to send the step of the first message to described 2nd AP.
3. the method for claim 1, it is characterised in that
When a described AP is initially the offer service of described client, described AC records described client
Following corresponding relation: on the ID of a described AP, a described AP, described client is corresponding
BSSID, the MAC Address of a described AP, the MAC Address of described client, described client
The information of AP switching whether was carried out within Preset Time；
Described AC is after receiving described second message, and the corresponding relation updating described client is: described
BSSID that on the ID of the oneth AP, a described AP, described client is corresponding, described 2nd AP
Whether MAC Address, the MAC Address of described client, described client are carried out within Preset Time
Cross the information of AP switching.
4. the method for claim 1, it is characterised in that
A described AP utilizes MAC Address and the MAC Address of described client of described 2nd AP
The data being sent to described client are transmitted to the process of described 2nd AP, specifically include: described first
AP adds the first heading before the data, and the data carrying the first heading are sent to described second
AP, is removed described first heading by described 2nd AP, and amended data is sent to described visitor
Family end；Wherein, the target MAC (Media Access Control) address of described first heading is the MAC Address of described 2nd AP,
Source MAC is the MAC Address of a described AP；
Described 2nd AP utilizes MAC Address and the MAC Address of a described AP of described client
Data from described client are sent to the process of a described AP, specifically include: described second
AP adds the second heading before the data, and the data carrying the second heading are sent to described first
AP, is removed described second heading by a described AP, and amended data are sent to purpose set
Standby；Wherein, the target MAC (Media Access Control) address of described second heading is the MAC Address of a described AP,
Source MAC is the MAC Address of described 2nd AP.
5. an access controller AC, is applied to include described AC, the first access point AP, the 2nd AP
With in the WLAN WLAN of client, a described AP provides clothes for being initially described client
The AP of business, it is characterised in that described AC includes:
Determine module, for utilizing client received signal strength indicator RSSI under an AP and the
RSSI under two AP determines that client is moved to the 2nd AP overlay area by an AP overlay area；
First sending module, for when determining that client is moved to the 2nd AP by an AP overlay area and covers
Cover region territory and described client, not when a described AP roams into described two AP, are led to by being used for
Know that the 2nd AP provides the first message of service to be sent to by described client corresponding informance for client described
2nd AP, described client corresponding informance includes: the medium access control MAC Address of described client,
The Basic Service Set mark that on the MAC Address of a described AP, a described AP, described client is corresponding
Know BSSID；Described first message is for making the 2nd AP utilize the BSSID in described client corresponding informance
Replace the BSSID of self, and utilize the MAC Address of described client and a described AP
Data from described client are sent to a described AP by MAC Address；
Receiver module, notifies described 2nd AP for receiving described 2nd AP to being used for of sending of this AC
Second message of service can be provided for described client, described second message is carried described 2nd AP's
MAC Address, the MAC Address of described client；
Second sending module, for after receiving described second message, is sent to institute by described second message
State an AP；Described second message utilizes the MAC Address of described 2nd AP for making a described AP
With the MAC Address of described client, the data being sent to described client are transmitted to described 2nd AP；
Wherein, described determine module, specifically for obtain described client RSSI under an AP and
RSSI under 2nd AP, the RSSI under an AP are the RSSI of nearest N1 the record of a described AP
Mean value, the RSSI under the 2nd AP is RSSI average of nearest N2 the record of described 2nd AP
Value；
As described client RSSI under an AP and described client RSSI under the 2nd AP
Difference more than or equal to preset RSSI thresholding time, determine described client by described oneth AP overlay area move
Move described 2nd AP overlay area；
Wherein, described 2nd AP utilizes the BSSID in described client corresponding informance to replace self
Individual BSSID, specifically includes:
When the N article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP
Time, described 2nd AP utilizes the BSSID of a described AP to replace the N article BSSID of self；
When the N article BSSID of described 2nd AP correspondence radio frequency is replaced by the BSSID of other AP, and
When the N-1 article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP,
Described 2nd AP utilizes the BSSID of a described AP to replace the N-1 article BSSID of self；
By that analogy.
6. AC as claimed in claim 5, it is characterised in that
Described first sending module, is further used for judging the number between a described AP and described client
According to retransmission rate whether more than or equal to presetting retransmission rate thresholding, and described client within Preset Time whether
Do not carried out AP switching；If data retransmission rate is more than or equal to presetting retransmission rate thresholding, and when default
Do not carried out AP switching between, then perform to send the first message to described 2nd AP.
7. AC as claimed in claim 5, it is characterised in that also include:
Maintenance module, for when a described AP is initially the offer service of described client, record is described
The following corresponding relation of client: on the ID of a described AP, a described AP, described client is corresponding
BSSID, the MAC Address of a described AP, the MAC Address of described client, described client
Whether end carried out the information of AP switching within Preset Time；
After receiving the second message, the corresponding relation updating described client is: the ID of a described AP,
BSSID that on a described AP, described client is corresponding, the MAC Address of described 2nd AP, described
Whether the MAC Address of client, described client carried out the information of AP switching within Preset Time.
8. an access point AP, as the 2nd AP be applied to include access controller AC, an AP,
In the WLAN WLAN of described 2nd AP and client, a described AP is described for being initially
Client provides the AP of service, it is characterised in that described 2nd AP includes:
Receiver module, for receive from described AC be used for notify the 2nd AP for client provide service
The first message, described first message carries described client corresponding informance, and described client pair
Information is answered to include: the medium access control MAC Address of described client, the MAC of a described AP
Basic service set identification BSSID that on address, a described AP, described client is corresponding；Wherein, institute
Stating the first message is that described AC is moved to the 2nd AP overlay area in client by an AP overlay area,
And client not transmission when an AP roams into two AP；
Processing module, for utilizing the BSSID that on a described AP, described client is corresponding to replace self
A BSSID；
Sending module, for sending for notifying that this equipment can provide service for client to described AC
Second message, carries the MAC ground of the MAC Address of the 2nd AP, described client in this second message
Location；By described AC, described second message is sent to a described AP；And described second message is used for making
A described AP utilizes the MAC Address of described 2nd AP and the MAC Address of described client to send out
The data giving described client are transmitted to this 2nd AP；Utilize MAC Address and the institute of described client
Data from described client are sent to a described AP by the MAC Address stating an AP；
Described 2nd AP utilizes the BSSID in described client corresponding informance to replace self one
BSSID, specifically includes:
When the N article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP
Time, described 2nd AP utilizes the BSSID of a described AP to replace the N article BSSID of self；
When the N article BSSID of described 2nd AP correspondence radio frequency is replaced by the BSSID of other AP, and
When the N-1 article BSSID of described 2nd AP correspondence radio frequency is not replaced by the BSSID of other AP,
Described 2nd AP utilizes the BSSID of a described AP to replace the N-1 article BSSID of self；
By that analogy.
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| CN104717706B (en) * | 2013-12-13 | 2019-01-25 | 中国电信股份有限公司 | The smooth loaming method of WLAN and system and access point and access controller |
| WO2016070342A1 (en) * | 2014-11-05 | 2016-05-12 | 华为技术有限公司 | Wireless charging method, wireless access point, and wireless charging system |
| CN108370585B (en) * | 2015-12-09 | 2022-02-01 | 韦勒斯标准与技术协会公司 | Wireless communication method and wireless communication terminal using multiple basic service identifier sets |
| CN107135548B (en) * | 2016-02-26 | 2020-10-30 | 新华三技术有限公司 | Method and device for updating BSSID and connecting network |
| CN115426088A (en) | 2016-03-04 | 2022-12-02 | 韦勒斯标准与技术协会公司 | Wireless communication method and wireless communication terminal |
| CN108024298B (en) * | 2017-11-29 | 2021-01-01 | 新华三技术有限公司 | Method and device for controlling terminal to actively roam |
| US10433230B2 (en) * | 2017-12-12 | 2019-10-01 | Cassia Networks Inc. | Methods, devices, and systems for supporting wireless roaming |
| CN109922506A (en) * | 2017-12-13 | 2019-06-21 | 中兴通讯股份有限公司 | Switching method, AP and AP collaborative work controller between AP |
| CN110519747A (en) * | 2018-05-21 | 2019-11-29 | 中兴通讯股份有限公司 | A kind of loaming method and AP and AP collaborative work controller |
| CN108934035B (en) * | 2018-06-26 | 2020-07-07 | 新华三技术有限公司 | Data backup method and device |
| CN109600810B (en) * | 2018-12-20 | 2021-05-07 | 四川天邑康和通信股份有限公司 | Method and system for fast and seamless switching of wifi roaming of wireless routing equipment |
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