CN104869555B - Processing method and processing device based on terminal roaming - Google Patents
Processing method and processing device based on terminal roaming Download PDFInfo
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- CN104869555B CN104869555B CN201510198375.8A CN201510198375A CN104869555B CN 104869555 B CN104869555 B CN 104869555B CN 201510198375 A CN201510198375 A CN 201510198375A CN 104869555 B CN104869555 B CN 104869555B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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Abstract
The present invention provides the processing method and processing device based on terminal roaming, and this method is applied on the AC in WLAN, including：After terminal accesses WLAN, according to the location information of the RSSI value of the terminal of at least two neighbor APs measurement of the associated AP of the terminal of acquisition and the specified associated APs of AC and the terminal determined according to the location information of associated AP and at least two neighbor APs, the reference signal intensity of computing terminal；Reference signal intensity is sent to associated AP；If receive associated AP transmission informs that terminal enters the viscous notice of viscous state, the RSSI value of the terminal then measured according to the associated AP of acquisition and its all neighbor APs, roaming AP is chosen for terminal, and notifies the roaming AP response terminals chosen, so that a roaming AP on terminal association.Therefore, the present invention can assist terminal to complete to roam in time, improve user experience.
Description
Technical field
The present invention relates to network communication technology fields, more particularly to the processing method and processing device based on terminal roaming.
Background technology
With the development of network communication technology, Wireless LAN (Wireless Local Area Networks,
WLAN) system is widely used.In wlan system, wireless access point (Access Point, AP) and terminal are opposite
It is independent.When terminal roaming, a new AP is selected to be associated or re-association by constantly spying the AP of surrounding.But
Be, some terminals leave current associated AP it is far when, cannot still be switched on new AP, this terminal is referred to as " viscous "
Terminal.In order to solve the problems, such as " viscous ", AP needs to assist the roaming of terminal.
In the prior art, before AP assists the roaming of terminal, the roaming opportunity to terminal is needed to carry out accurate
Judge, it is general using according to the received signal strength indicator of terminal (Received Signal Strength Indication,
RSSI) value judges the roaming opportunity of terminal, i.e., when AP detects that the RSSI value of terminal is less than specified threshold, then to terminal
Roaming is assisted.
But since the RSSI value of terminal can be fluctuated by influences such as spatial obstacle object, battery capacity, transmission powers
Range is very big, causes AP that can not carry out accurate judgement to the roaming opportunity of terminal, some non-viscous terminals are judged as viscous end
End, some viscous terminals are not judged out in time, this results in the effect of AP auxiliary terminal roaming poor, thereby reduces
User experience.
Invention content
The present invention provides the processing method and processing device based on terminal roaming, in a manner of solving existing AP auxiliary terminal roaming
Lead to the problem that user experience is poor.
According to a first aspect of the embodiments of the present invention, a kind of processing method based on terminal roaming is provided, the method is answered
For the AC in WLAN, this method includes：
After terminal accesses the WLAN, according to the specified association of the associated AP of the terminal of acquisition and the AC
The received signal strength indicator RSSI value for the terminal that at least two neighbor APs of AP measure and according to the associated AP and institute
The location information for the terminal that the location informations of at least two neighbor APs is determined is stated, the reference signal for calculating the terminal is strong
Degree；
The reference signal intensity is sent to the associated AP, so that the associated AP is according to the reference signal intensity
The RSSI value of the terminal monitored with itself judges whether the terminal enters viscous state, and the viscous state is used for table
Levy the terminal be in need to be associated with far from the associated AP roaming AP but it is also not associated upper when state；
If receive the associated AP transmission informs that the terminal enters the viscous notice of viscous state, according to acquisition
Associated AP and its RSSI value of the terminal that measures of all neighbor APs, choose roaming AP for the terminal, and notify to choose
Roaming AP respond the terminal so that a roaming AP on the terminal association.
According to a second aspect of the embodiments of the present invention, a kind of processing unit based on terminal roaming is provided, described device is answered
For the AC in WLAN, including：
Computing unit is used for after terminal accesses the WLAN, according to the associated AP of the terminal of acquisition and the AC
The received signal strength indicator RSSI value for the terminal that at least two neighbor APs of the specified associated AP measure and according to
The location information for the terminal that the location information of the associated AP and at least two neighbor AP is determined, calculates the end
The reference signal intensity at end；
Transmission unit, for the reference signal intensity to be sent to the associated AP, so that the associated AP is according to institute
The RSSI value for the terminal stated reference signal intensity and itself monitored judges whether the terminal enters viscous state, described
Viscous state is in for characterizing the terminal far from the associated AP, need to be associated with roaming AP but it is also not associated upper when
State；
Processing unit, if informing that the terminal enters the viscous logical of viscous state for receive that the associated AP sends
Know, then the RSSI value of the terminal measured according to the associated AP of acquisition and its all neighbor APs chooses roaming for the terminal
AP, and the roaming AP chosen is notified to respond the terminal, so that a roaming AP on the terminal association.
Using the embodiment of the present invention, AC is specified after terminal accesses WLAN according to the associated AP of the terminal of acquisition and AC
The received signal strength indicator RSSI value for the terminal that at least two neighbor APs of associated AP measure and according to associated AP and at least two
The location information for the terminal that the location information of a neighbor AP is determined, the reference signal intensity of computing terminal；Reference signal is strong
Degree is sent to associated AP, so that associated AP judges that terminal is according to the RSSI value of reference signal intensity and the terminal itself monitored
It is no to enter viscous state；If receive associated AP transmission informs that terminal enters the viscous notice of viscous state, according to acquisition
Associated AP and its all neighbor APs measure terminal RSSI value, for terminal choose roaming AP, and notify choose roaming AP
Terminal is responded, so that a roaming AP on terminal association.As it can be seen that in the present invention, terminal is provided from AC to the associated AP of terminal
Reference signal intensity can accurately judge end so as to the RSSI value of the associated AP benchmark signal strength and terminal
When end is in viscous state, and follow-up AC is that terminal chooses best roaming AP, and auxiliary terminal is completed to roam in time, improves user
Experience.
Description of the drawings
Fig. 1 is to apply processing application scenarios schematic diagram of the embodiment of the present invention based on terminal roaming；
Fig. 2 is one embodiment flow chart of the processing method the present invention is based on terminal roaming；
Fig. 3 be the reference signal intensity of computing terminal in the processing method the present invention is based on terminal roaming flow chart it
One；
Fig. 4 be the reference signal intensity of computing terminal in the processing method the present invention is based on terminal roaming flow chart it
Two；
Fig. 5 is that the present invention is based on a kind of hardware structure diagrams of equipment where the processing unit of terminal roaming；
Fig. 6 is one embodiment block diagram of the processing unit the present invention is based on terminal roaming.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the embodiment of the present invention, and make of the invention real
The above objects, features, and advantages for applying example can be more obvious and easy to understand, below in conjunction with the accompanying drawings to technical side in the embodiment of the present invention
Case is described in further detail.
Referring to Fig. 1, to apply processing application scenarios schematic diagram of the embodiment of the present invention based on terminal roaming：
A kind of group-network construction of WLAN is shown in Fig. 1.The WLAN includes wireless controller (Wireless Access
Point Controller, AC) and AP.AC can be one, and AP can be multiple, for example, AP1, AP2 and AP3, AP1 is eventually
The current associated AP in end.
Wherein, AC is the control core in WLAN, is responsible for each AP in WLAN, and AP is the access point of WLAN, terminal
WLAN can be entered by the access point.The terminal may include various smart mobile phones, tablet computer, PC (Personal
Computer, personal computer) etc..
When terminal leave associated AP it is far when, cannot still be switched on new AP, it is determined that the terminal enters viscous
State.In the prior art, in order to solve the problems, such as " viscous ", AP needs to assist terminal.The general reception using according to terminal
RSSI value judge the roaming opportunity of terminal, still, due to terminal RSSI value can by spatial obstacle object, battery capacity,
The influences such as transmission power, fluctuation range is very big, can not carry out accurate judgement to the roaming opportunity of terminal so as to cause AP, and tight
Ghost image rings the roaming effect of terminal.
And in the embodiment of the present invention, after terminal enters WLAN, AC can be according to the positional information calculation reference signal of terminal
Intensity, and the reference signal intensity is sent to the AP of the terminal association, and by associated AP according to reference signal intensity and measurement
The RSSI value of terminal judge when terminal enters viscous state, i.e., the RSSI value of the described reference signal intensity and the terminal it
Between difference be more than preset difference value, then by AC from the neighbor AP of the AP of the terminal association, selection can release viscous state
AP is roamed, and notifies these AP active response terminals, so that terminal is associated with a roaming AP in time, successfully completes roaming.
Therefore, in the embodiment of the present invention, the reference signal intensity of terminal is provided to the associated AP of terminal from AC, so as to the pass
The RSSI value for joining AP benchmarks signal strength and terminal, can accurately judge when terminal is in viscous state, subsequently
AC is that terminal chooses best roaming AP, and auxiliary terminal is completed to roam in time, improves user experience.
The embodiment of the processing method the present invention is based on terminal roaming is described in detail below in conjunction with the accompanying drawings.
Referring to Fig. 2, for the present invention is based on one embodiment flow chart of the processing method of terminal roaming, the embodiment from
The sides AC in WLAN are described, and this approach includes the following steps：
Step 210：After terminal accesses WLAN, at least according to the specified associated AP of the associated AP of the terminal of acquisition and AC
The received signal strength indicator RSSI value for the terminal that two neighbor APs measure and the position according to associated AP and at least two neighbor APs
The location information for the terminal that confidence breath is determined, the reference signal intensity of computing terminal.
Step 220：Reference signal intensity is sent to associated AP, so that associated AP is according to reference signal intensity and itself prison
The RSSI value of the terminal measured judges whether terminal enters viscous state, which is in for characterizing terminal far from pass
Join AP, need to be associated with roaming AP but it is also not associated upper when state.
Step 230：If receive associated AP transmission informs that terminal enters the viscous notice of viscous state, according to acquisition
Associated AP and its all neighbor APs measure terminal RSSI value, for terminal choose roaming AP, and notify choose roaming AP
Terminal is responded, so that a roaming AP on terminal association.
In one embodiment, as shown in figure 3, the reference signal intensity of terminal is calculated by following steps by AC：
Step 310：According to the RSSI value for the terminal that the associated AP of acquisition and at least two neighbor APs measure, computing terminal
Initial baseline signal strength.
In the embodiment of the present invention, for the accuracy of initial baseline signal strength, when calculating initial baseline signal strength, one
As the RSSI value of terminal that is measured using multiple AP, these AP can be specifically designated by AC, for example, AP1, AP2 and AP3 in Fig. 1
The RSSI value measured.
Step 320：According to the location information of initial baseline signal strength and terminal, the reference signal intensity of computing terminal.
Specifically, following manner may be used and obtain what associated AP and at least two neighbor APs in above-mentioned steps 310 measured
The RSSI value of terminal：
(1) RSSI value of associated AP and at least two neighbor AP measuring terminals is notified respectively.
(2) RSSI value respectively measured that associated AP and at least two neighbor APs are sent is received.
Herein, it for associated AP and at least two neighbor APs, is intended to, according to this notices of AC, start to terminal
It measures.
Such as：AC notifies at least two neighbor AP (the i.e. AP2 of the AP (i.e. AP1) and associated AP of terminal association respectively
And AP3) measuring terminals RSSI value；After follow-up AP1, AP2 and AP3 receive this notice, starts to measure terminal, obtain
To corresponding RSSI value, respectively RSSI1, RSSI2 and RSSI3, the RSSI value of measurement is sent to the AC by this 3 AP respectively.
Specifically, the initial baseline signal strength that following manner calculates terminal in above-mentioned steps 310 may be used：
Choose greatest rssi value from the RSSI value that the associated AP of acquisition and at least two neighbor APs measure, and with it is preset
Signal strength error carries out summation operation, obtains initial baseline signal strength.
Such as：The RSSI value that AP1, AP2 and AP3 are measured is respectively RSSI1, RSSI2 and RSSI3, and greatest rssi value is
RSSI3, preset signal strength error are 5, then initial baseline signal strength is the sum of RSSI3 and 5.
Wherein, preset signal strength error is set according to actual conditions, and can be 5, can also be 6,7,8 etc..
According to the location information of initial baseline signal strength and terminal, the reference signal of computing terminal in above-mentioned steps 320
It, can be with as shown in figure 4, including the following steps when intensity：
Step 410：According to the location information of the location information of terminal and associated AP and at least two neighbor APs, determine eventually
End and the distance between associated AP and at least two neighbor APs.
Wherein, the location information of terminal can be obtained according to the principle of three-point fix, i.e. the location information of terminal need to
Lack the location information of three AP to position.
Such as：Obtain the AP (i.e. AP1) and associated AP of the terminal association at least two neighbor APs (i.e. AP2 and
AP3 location information).These location informations can be the information manually entered, the coordinate information that can also be obtained from map.
It is measured according to the location information (i.e. the location information of AP1, AP2 and AP3) of each AP of acquisition and each AP
RSSI value (i.e. RSSI1, RSSI2 and RSSI3), positions terminal, obtains the location information of terminal.
There are many kinds of the above-mentioned existing algorithms positioned to terminal, and the embodiment of the present invention is not restricted this, as long as energy
Access the location information of terminal.
Step 420：According to the terminal determined and the distance between associated AP and at least two neighbor APs, associated AP is determined
With the RSSI error amounts of at least two neighbor APs.
In the present embodiment, when calculating RSSI error amounts, the formula decayed using existing signal is needed to calculate, the letter
Number decaying formula such as formula (1) shown in.
PR=P0-10 γ log (d) formula (1)
Wherein, PR indicates that the signal strength of receiving area, P0 indicate that the signal strength at sender 1m, γ rely on signal and propagate
Feature is handled in different scenes using different constants, and d indicates distance.
In the embodiment of the present invention, d indicates the distance between terminal and each AP, difference of the RSSI error amounts between P0 and PR
Value.
Step 430：By the average value for the RSSI error amounts determined, summation operation is carried out with initial baseline signal strength,
Obtain reference signal intensity.
Wherein, reference signal intensity is the sum of RSSI average error and initial baseline signal strength.
In one embodiment, in above-mentioned steps 220, after reference signal intensity is sent to associated AP by AC, for
For associated AP, the path loss according to the reference signal intensity monitor terminal received is needed, that is, calculating benchmark signal strength
Difference between the RSSI value of the terminal of measurement, and in calculated difference meet certain threshold condition (such as difference is big
In preset difference value, this preset difference value can be set according to the actual conditions of network) when, assert that the terminal is in viscous state, at this
In the case of kind, associated AP needs notice AC in time, that is, inform that terminal is in the viscous notice of viscous state to AC transmissions, so as to
AC assists terminal to complete roaming in time, improves user experience.
It should be noted that for associated AP, when judging whether terminal is in viscous state, in order to ensure to judge
As a result accuracy can remeasure the RSSI value of terminal, will not be according to before according to the RSSI value of the AC measuring terminals issued
Notice feedback RSSI value judged.
In another embodiment, the terminal that following manner acquisition associated AP and its all neighbor APs measure may be used
RSSI value：
(1) after receiving viscous notice, the RSSI value of associated AP and its all neighbor AP measuring terminals is notified respectively.
(2) RSSI value respectively measured that associated AP and its all neighbor APs are sent is received.
Herein, it for associated AP and all neighbor APs, is intended to, according to this notices of AC, start to carry out terminal
It measures.
It is corresponding, it is measured according to the associated AP of acquisition and its all neighbor APs in step 230 in Fig. 2 when executing
Following manner may be used when choosing roaming AP for terminal in the RSSI value of terminal：
RSSI value is selected to be more than the RSSI value of the RSSI value given threshold of the associated AP obtained from the RSSI value of acquisition, and
Using the corresponding neighbor AP of the RSSI value selected as the roaming AP chosen.
Furthermore it is also possible to according to the difference between the RSSI value of the associated AP of acquisition and its terminal of all neighbor APs measurement
Value chooses roaming AP, specially for terminal：
If the RSSI value that neighbor AP measures is more than the RSSI value that associated AP is measured, the RSSI value that neighbor AP measures is calculated
Difference between the RSSI value measured with associated AP, and according to all differences being calculated be terminal selection can release it is viscous
The roaming AP of stagnant state.
Specifically, if the RSSI value that neighbor AP measures is not more than the RSSI value that associated AP is measured, show the neighbor AP
Best roaming service cannot be provided for terminal, then ignore or abandon the RSSI value that the neighbor AP measures.
If the RSSI value that neighbor AP measures is more than the RSSI value that associated AP is measured, show that the neighbor AP can be able to be
Terminal provides best roaming service, then calculating difference.
In addition, as to how being the roaming AP that terminal selection can release viscous state according to the difference being calculated, originally
Invention does not limit specifically, can directly choose that difference is maximum as selected roaming AP, can also will be calculated
Each difference will be greater than the corresponding neighbor AP of difference of predetermined threshold value as selected roaming AP compared with predetermined threshold value.
Wherein, there are one selected roaming AP possibility, it is also possible to have multiple.When there is multiple roaming AP, AC can be controlled
What multiple roaming AP all replied terminal spies request message (i.e. Probe Request messages), and determines to be associated with by terminal
Which roaming AP.
In another embodiment, after selecting for terminal roaming AP, it can notify associated AP is released to be associated with terminal,
To be associated in time on best roaming AP.
Specifically, after selecting roaming AP for terminal, it can be sent to the AP of terminal association and release notice, so that terminal
Associated AP is associated with terminal according to releasing notice and release；
Meanwhile association notice can be sent to the roaming AP that can release viscous state, so that this can release viscous
The roaming AP of state spies request message according to what association notice response terminal was sent, and is determined and which roaming by the terminal
AP establishes association.
In addition, being not received by the AP default conditions of association notice can be：That does not reply terminal transmission spies request report
Text.
Corresponding with the aforementioned embodiment of the processing method based on terminal roaming, the present invention also provides based on terminal roaming
Processing unit embodiment.
The present invention is based on the embodiments of the processing unit of terminal roaming to apply on network devices, such as：AC.Device
Embodiment can also be realized by software realization by way of hardware or software and hardware combining.For implemented in software,
It is by the processor of equipment where it by corresponding calculating in nonvolatile memory as the device on a logical meaning
Machine program instruction reads what operation in memory was formed.For hardware view, as shown in figure 5, unrestrained for the present invention is based on terminals
A kind of hardware structure diagram of equipment where the processing unit of trip, in addition to processor shown in fig. 5, network interface, memory and non-
Except volatile memory, the equipment in embodiment where device usually can also include other hardware, such as be responsible for processing message
Forwarding chip etc.；The equipment is also possible to be distributed equipment from hardware configuration, may include multiple interface cards,
To carry out the extension of Message processing in hardware view.
Referring to Fig. 6, for the present invention is based on one embodiment block diagram of the processing unit of terminal roaming, described device can answer
With on AC in a wlan, and it can be used for executing Fig. 2 to the processing method shown in Fig. 4 based on terminal roaming, described device
Including：Computing unit 61, transmission unit 62 and processing unit 63.
Wherein, computing unit 61 be used for when terminal access the WLAN after, according to the associated AP of the terminal of acquisition with
The received signal strength indicator RSSI value for the terminal that at least two neighbor APs of the associated AP specified AC measure,
And the location information for the terminal determined according to the location information of the associated AP and at least two neighbor AP, it calculates
The reference signal of the terminal；
Transmission unit 62 is used to the reference signal intensity being sent to the associated AP, so that the associated AP is according to institute
The RSSI value for the terminal stated reference signal intensity and itself monitored judges whether the terminal enters viscous state, described
Viscous state is in for characterizing the terminal far from the associated AP, need to be associated with roaming AP but it is also not associated upper when
State；
If processing unit 63 is used to receive, the associated AP sends informs that the terminal enters the viscous of viscous state
Notice, the then RSSI value of the terminal measured according to the associated AP of acquisition and its all neighbor APs are chosen unrestrained for the terminal
AP is swum, and the roaming AP chosen is notified to respond the terminal, so that a roaming AP on the terminal association.
In an optional realization method, the computing unit 61 is specifically used for the associated AP according to acquisition and institute
The RSSI value for stating the terminal of at least two neighbor APs measurement, calculates the initial baseline signal strength of the terminal；And root
According to the location information of the initial baseline signal strength and the terminal, the reference signal intensity of the terminal is calculated.
In another optional realization method, the computing unit 61 may include：Notify subelement, receiving subelement,
First computation subunit and the second computation subunit (being not shown in Fig. 6).
Wherein, notice subelement for notifying the associated AP and at least two neighbor AP to measure the terminal respectively
RSSI value.
Receiving subelement is used to receive that the associated AP and at least two neighbor AP to send respectively measures
RSSI value.
The RSSI value that first computation subunit is used to measure from the associated AP of acquisition and at least two neighbor AP
Middle selection greatest rssi value, and summation operation is carried out with preset signal strength error, obtain the initial baseline signal strength.
Second computation subunit is used for according to the location information of the terminal and the associated AP and at least two neighbour
The location information for occupying AP determines the terminal and the distance between the associated AP and at least two neighbor AP；According to true
The terminal made and the distance between the associated AP and at least two neighbor AP determine the associated AP and described
The RSSI error amounts of at least two neighbor APs；It is strong with the initial baseline signal by the average value for the RSSI error amounts determined
Degree carries out summation operation, obtains the reference signal intensity.
In another optional realization method, the processing unit 63 may include：First notice subelement receives son list
Member and selection subelement (being not shown in Fig. 6).
Wherein, first notice subelement be used for after receiving the viscous notice, notify respectively the associated AP and its
All neighbor APs measure the RSSI value of the terminal.
Receiving subelement is used to receive the RSSI value respectively measured that the associated AP and its all neighbor APs are sent.
Select RSSI value of the subelement for selecting RSSI value to be more than the associated AP obtained from the RSSI value of acquisition
The RSSI value of given threshold, and using the corresponding neighbor AP of the RSSI value selected as the roaming AP chosen.
In another optional realization method, the processing unit 63 may include：Do not show in second notice subelement Fig. 6
Go out).
Wherein, the second notice subelement is used for after selecting roaming AP for the terminal, and the associated AP is notified to release
With being associated with for the terminal.
The function of each unit and the realization process of effect specifically refer to and correspond to step in the above method in above-mentioned apparatus
Realization process, details are not described herein.
For device embodiments, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separating component
The unit of explanation may or may not be physically separated, and the component shown as unit can be or can also
It is not physical unit, you can be located at a place, or may be distributed over multiple network units.It can be according to actual
It needs that some or all of module therein is selected to realize the purpose of the present invention program.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
As seen from the above-described embodiment, the reference signal intensity that terminal is provided from AC to the associated AP of terminal, so as to the association
The RSSI value of AP benchmarks signal strength and terminal, can accurately judge when terminal is in viscous state, follow-up AC
Best roaming AP is chosen for terminal, auxiliary terminal is completed to roam in time, improves user experience.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the present invention
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the invention is not limited in the precision architectures for being described above and being shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of processing method based on terminal roaming, which is characterized in that the method is applied in Wireless LAN WLAN
Wireless controller AC on, this method includes：
After terminal accesses the WLAN, according to the specified institute of the association wireless access point AP of the terminal of acquisition and the AC
State the received signal strength indicator RSSI value of the terminal of at least two neighbor APs measurement of associated AP and according to the association
The location information for the terminal that AP and the location information of at least two neighbor AP are determined, calculates the benchmark of the terminal
Signal strength；
The reference signal intensity is sent to the associated AP, so that the associated AP is according to the reference signal intensity and certainly
The RSSI value for the terminal that body monitors judges whether the terminal enters viscous state, and the viscous state is for characterizing institute
State terminal be in need to be associated with far from the associated AP roaming AP but it is also not associated upper when state；
If receive the associated AP transmission informs that the terminal enters the viscous notice of viscous state, according to the pass of acquisition
The RSSI value for joining the terminal of AP and its measurement of all neighbor APs chooses roaming AP for the terminal, and notify to choose overflows
It swims AP and responds the terminal, so that a roaming AP on the terminal association.
2. according to the method described in claim 1, it is characterized in that, the reference signal for calculating the terminal by following manner is strong
Degree：
According to the RSSI value for the terminal that the associated AP of acquisition and at least two neighbor AP measure, the end is calculated
The initial baseline signal strength at end；
According to the location information of the initial baseline signal strength and the terminal, the reference signal intensity of the terminal is calculated.
3. according to the method described in claim 2, it is characterized in that, by following manner obtain the associated AP and it is described at least
The RSSI value for the terminal that two neighbor APs measure：
The associated AP and at least two neighbor AP is notified to measure the RSSI value of the terminal respectively；
Receive the RSSI value respectively measured that the associated AP and at least two neighbor AP are sent；
The initial baseline signal strength of the terminal is calculated by following manner：
Choose greatest rssi value from the RSSI value that the associated AP of acquisition and at least two neighbor AP measure, and with it is pre-
If signal strength error carry out summation operation, obtain the initial baseline signal strength；
The location information according to the initial baseline signal strength and the terminal, the reference signal for calculating the terminal are strong
Degree, specifically includes：
According to the location information of the location information of the terminal and the associated AP and at least two neighbor AP, institute is determined
State terminal and the distance between the associated AP and at least two neighbor AP；
According to the terminal determined and the distance between the associated AP and at least two neighbor AP, the pass is determined
Join the RSSI error amounts of AP and at least two neighbor AP；
By the average value for the RSSI error amounts determined, summation operation is carried out with the initial baseline signal strength, is obtained described
Reference signal intensity.
4. according to the method in any one of claims 1 to 3, which is characterized in that by following manner obtain associated AP and
The RSSI value for the terminal that its all neighbor AP measures：
After receiving the viscous notice, the associated AP and its all neighbor APs is notified to measure the RSSI of the terminal respectively
Value；
Receive the RSSI value respectively measured that the associated AP and its all neighbor APs are sent；
The RSSI value of the terminal measured according to the associated AP of acquisition and its all neighbor APs, chooses unrestrained for the terminal
AP is swum, is specifically included：
From the RSSI value of acquisition select RSSI value be more than obtain the associated AP RSSI value and selection RSSI value with obtain
Difference between the RSSI value of the associated AP taken is more than given threshold, and the corresponding neighbor AP of the RSSI value selected is made
For the roaming AP of selection.
5. according to the method described in claim 4, it is characterized in that, this method further includes：
After select roaming AP for the terminal, notify the associated AP is released to be associated with the terminal.
6. a kind of processing unit based on terminal roaming, which is characterized in that described device is applied in Wireless LAN WLAN
Wireless controller AC on, including：
Computing unit, for when terminal access the WLAN after, according to the association wireless access point AP of the terminal of acquisition with
The received signal strength indicator RSSI value for the terminal that at least two neighbor APs of the associated AP specified AC measure,
And the location information for the terminal determined according to the location information of the associated AP and at least two neighbor AP, it calculates
The reference signal intensity of the terminal；
Transmission unit, for the reference signal intensity to be sent to the associated AP, so that the associated AP is according to the base
The RSSI value of calibration signal intensity and the terminal itself monitored judges whether the terminal enters viscous state, described viscous
State for characterize the terminal be in need to be associated with far from the associated AP roaming AP but it is also not associated upper when shape
State；
Processing unit, if informing that the terminal enters the viscous notice of viscous state for receive that the associated AP sends,
The RSSI value of the terminal then measured according to the associated AP of acquisition and its all neighbor APs chooses roaming AP for the terminal,
And the roaming AP chosen is notified to respond the terminal, so that a roaming AP on the terminal association.
7. device according to claim 6, which is characterized in that the computing unit is specifically used for the pass according to acquisition
Join the RSSI value of the terminal of AP and at least two neighbor AP measurement, the initial baseline signal for calculating the terminal is strong
Degree；And the location information according to the initial baseline signal strength and the terminal, the reference signal for calculating the terminal are strong
Degree.
8. device according to claim 7, which is characterized in that the computing unit includes：
Subelement is notified, for notifying the associated AP and at least two neighbor AP to measure the RSSI of the terminal respectively
Value；
Receiving subelement, the RSSI respectively measured sent for receiving the associated AP and at least two neighbor AP
Value；
First computation subunit, for being selected from the RSSI value that the associated AP of acquisition and at least two neighbor AP measure
Greatest rssi value is taken, and summation operation is carried out with preset signal strength error, obtains the initial baseline signal strength；
Second computation subunit, for according to the location information of the terminal and the associated AP and at least two neighbours
The location information of AP determines the terminal and the distance between the associated AP and at least two neighbor AP；According to determination
The terminal that goes out and the distance between the associated AP and at least two neighbor AP, determine the associated AP and it is described extremely
The RSSI error amounts of few two neighbor APs；By the average value for the RSSI error amounts determined, with the initial baseline signal strength
Summation operation is carried out, the reference signal intensity is obtained.
9. the device according to any one of claim 6 to 8, which is characterized in that the processing unit includes：
First notice subelement, for after receiving the viscous notice, notifying the associated AP and its all neighbours respectively
AP measures the RSSI value of the terminal；
Receiving subelement, the RSSI value respectively measured sent for receiving the associated AP and its all neighbor APs；
Select subelement, for from the RSSI value of acquisition select RSSI value be more than obtain the associated AP RSSI value and
Difference between the RSSI value of selection and the RSSI value of the associated AP of acquisition is more than given threshold, and the RSSI that will be selected
It is worth corresponding neighbor AP as the roaming AP chosen.
10. device according to claim 9, which is characterized in that the processing unit further includes：
Second notice subelement, for after selecting roaming AP for the terminal, the associated AP being notified to release and the end
The association at end.
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| CN107046699B (en) * | 2017-04-27 | 2020-07-07 | 新华三技术有限公司 | Wireless terminal roaming method and device |
| CN108924815A (en) * | 2018-06-20 | 2018-11-30 | 普联技术有限公司 | A kind of wireless roaming method and system |
| CN110572812B (en) * | 2019-09-20 | 2022-05-24 | 新华三信息安全技术有限公司 | Roaming method and device |
| CN111031549B (en) * | 2019-11-07 | 2023-01-10 | 锐捷网络股份有限公司 | Method for realizing automatic networking of distributed bridging system and AP |
| CN113596864B (en) * | 2020-04-30 | 2023-08-22 | 华为技术有限公司 | Terminal roaming guide method, device, equipment and computer readable storage medium |
| WO2022110216A1 (en) * | 2020-11-30 | 2022-06-02 | 西门子股份公司 | Wireless channel control method and apparatus, and storage medium and wlan network system |
| CN113259853B (en) * | 2020-12-23 | 2024-03-01 | 南京熊猫电子股份有限公司 | Method and system for automatically identifying mobile phone roaming places of drivers and passengers |
| CN114302319A (en) * | 2021-11-29 | 2022-04-08 | 广州凡拓数字创意科技股份有限公司 | Optimized triangulation positioning method and system based on visual configuration base station |
| CN117880893B (en) * | 2024-03-11 | 2024-05-14 | 四川天邑康和通信股份有限公司 | Network load balancing method, device and medium applied to FTTR networking |
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