CN107708163A - A kind of roving link switching method, mobile terminal, network modules and storage medium - Google Patents
A kind of roving link switching method, mobile terminal, network modules and storage medium Download PDFInfo
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- CN107708163A CN107708163A CN201710846530.1A CN201710846530A CN107708163A CN 107708163 A CN107708163 A CN 107708163A CN 201710846530 A CN201710846530 A CN 201710846530A CN 107708163 A CN107708163 A CN 107708163A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention discloses a kind of roving link switching method, mobile terminal, network modules and storage medium, the present invention obtains WAP to be connected by searching for available WAP in current environment；And link is established respectively with the WAP to be connected, select a link to enter row data communication as primary link from the link, remaining link is as standby link；Then according to the primary link and standby link, preparatory condition is unsatisfactory in the communication quality for detecting the primary link, when needing to carry out roving link switching, a link is chosen from the standby link, and the link switching of selection is subjected to data communication for primary link, so as to solve the problems, such as link down, packet loss present in current wireless local area network (WLAN) system roving link handoff procedure, user terminal data communication in roving link handoff procedure is not disrupted, provides the user the network experience that reliable network service improves user.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of roving link switching method, mobile terminal, network modules
And storage medium.
Background technology
In recent years, with wireless technology development and reach its maturity, wireless network is rapidly applied to each of life
Aspect, many facilities are brought to us, at present both at home and abroad to wireless network (Wireless Fidelity, WiFi) should
With relatively broad.Can be wirelessly mutual by PC, handheld device (such as Pad, mobile phone) terminal as one kind
The technology being connected, WiFi network can it is fast-developing the reason for one of be due to 802.11 technologies (International Power electronic engineering
Can be WLAN formulate standard) provide mobility, mobility require wireless terminal (Station, STA) possess from
One WAP (Access Point, AP) still keeps upper level applications net when being transitioned on another WAP
The function of network connection, this function are referred to as roaming.
In existing WLAN (Wireless Local Area Networks, WLAN) system, typical roaming
Process is:STA first carries out all channel scanning before roaming, collects available AP lists, then first disconnects the AP currently connected, then
Again the most strong AP of next signal is associated, but is still using first going to sweep when being STA roamings the problem of this process is present
The AP lists of surrounding are retouched, are then turned off the AP currently connected, then the method for associating next AP again, and due to data safety
It is required that it is close to pass through Extensible Authentication Protocol (EAP Over Lan, EAPOL) message interaction based on LAN in AP association process
Key process, therefore can still have communication link short interruption across the moment of scan channel and roaming switch in roam procedure
Moment, the moment duration is from a few tens of milliseconds to hundreds of milliseconds, so as to cause packet loss.For some to network connectivity requirements
For strict application or equipment, the packet loss is insufferable, and network service outages, application crash etc. can be triggered abnormal
Behavior.
The above is only used for auxiliary and understands technical scheme, does not represent and recognizes that the above is existing skill
Art.
The content of the invention
It is a primary object of the present invention to provide a kind of roving link switching method, mobile terminal, network modules and deposit
Storage media, it is intended to solve the problems, such as existing link down, packet loss during existing wireless local area network (WLAN) system roaming switch.
To achieve the above object, the invention provides a kind of roving link switching method, the roving link switching method
Comprise the following steps:
Available WAP in current environment is searched for, obtains WAP to be connected；
Link is established respectively with the WAP to be connected, and a link is selected from the link as primary link
Enter row data communication, remaining link is as standby link；
When the communication quality for detecting the primary link is unsatisfactory for preparatory condition, a chain is chosen from the standby link
Road, and be that primary link carries out data communication by the link switching of selection.
Preferably, available WAP in the search current environment, obtains WAP step to be connected, has
Body includes：
Available WAP in current environment is searched for, the logical of each WAP is obtained according to the WAP
Believe parameter；
According to the messaging parameter, the weighted signal strength value of the WAP is calculated；
By the weighted signal strength value compared with predetermined threshold value, according to comparative result from the WAP
Choose WAP to be connected.
Preferably, the messaging parameter includes：In service set, Basic Service Set Identification, channel and signal intensity
At least one of；
Correspondingly, it is described according to the messaging parameter, the weighted signal strength value step of the WAP is calculated, is had
Body includes：
Preset weights corresponding to obtaining each messaging parameter and each messaging parameter, the weighted average of each messaging parameter is calculated,
And using the weighted signal strength value of the weighted average of calculating WAP as corresponding to.
Preferably, described to select a link to enter row data communication as primary link from the link, remaining link is made
For standby link step, specifically include：
Link corresponding to the maximum WAP of the weighted signal strength value is chosen as primary link progress data to lead to
Letter, remaining link is as standby link.
Preferably, the step of communication quality that ought detect the primary link is unsatisfactory for preparatory condition, specifically includes：
The messaging parameter of the primary link is obtained in real time, and calculates the current weighted signal strength value of the primary link；
When the current weighted signal strength value is no more than predetermined threshold value, assert that the communication quality of the primary link is discontented with
Sufficient preparatory condition.
Preferably, it is described that a link is chosen from the standby link, and the link switching being selected is entered for primary link
Row data communication step, is specifically included：
Messaging parameter corresponding to obtaining the WAP of each standby link connection, according to the messaging parameter, is calculated each standby
The current weighted signal strength value of the WAP of link connection；
Link where choosing the maximum WAP of current weighted signal strength value is used as Target Link, and described in general
Target Link switches to primary link to enter row data communication.
Preferably, it is described to establish link step respectively with the WAP to be connected, specifically include：
The first default radio frames of WAP transmission to link to be established are authenticated association and establish Radio Link.
Preferably, the WAP is wireless by the second default radio frames feedback when current wireless protocol is constant
Environmental information, the radio environment information include：In channel utilization rate, noise figure and neighbor radio access points channel list extremely
One item missing.
In addition, to achieve the above object, the present invention also proposes a kind of mobile terminal, and the mobile terminal includes：
The roving link switching that memory, processor and being stored in can be run on the memory and on the processor
Program, the step of roving link changeover program is arranged for carrying out roving link switching method as described above.
In addition, to achieve the above object, the present invention also proposes a kind of network modules, and the module includes：Memory, processing
Device and the roving link changeover program that can be run on the memory and on the processor is stored in, the roving link is cut
Change the step of program is arranged for carrying out roving link switching method as described above.
In addition, to achieve the above object, the present invention also proposes a kind of storage medium, and roaming is stored with the storage medium
Link switching program, roving link switching side as described above is realized when the roving link changeover program is executed by processor
The step of method.
The present invention obtains WAP to be connected by searching for available WAP in current environment；And with institute
State WAP to be connected and establish link respectively, select a link to carry out data as primary link from the link and lead to
Letter, remaining link is as standby link；Then according to the primary link and standby link, the communication quality of the primary link is being detected
Preparatory condition is unsatisfactory for, it is necessary to when carrying out roving link switching, chooses a link from the standby link, and by the chain of selection
Road switches to primary link to enter row data communication, exists so as to solve in current wireless local area network (WLAN) system roving link handoff procedure
Link down, packet loss the problem of, make user terminal in roving link handoff procedure data communication be not disrupted, carried for user
The network that user is improved for reliable network service is experienced.
Brief description of the drawings
Fig. 1 is the structural representation of the roaming device for the hardware running environment that scheme of the embodiment of the present invention is related to；
Fig. 2 is the schematic flow sheet of roving link switching method first embodiment of the present invention；
Fig. 3 is the schematic flow sheet of roving link switching method second embodiment of the present invention；
Fig. 4 is to associate procedure chart of reaching the standard grade between wireless terminal and WAP in the prior art；
Fig. 5 is that wireless terminal and WAP associate procedure chart of reaching the standard grade in second embodiment of the invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Reference picture 1, Fig. 1 are the roaming device structural representation for the hardware running environment that scheme of the embodiment of the present invention is related to.
In the specific implementation, the roaming device both can be a mobile terminal or a network modules, originally
Embodiment is not any limitation as to this.
As shown in figure 1, the roaming device can include：Processor 1001, such as CPU, communication bus 1002, user interface
1003, network interface 1004, memory 1005, less radio-frequency 1006.Wherein, communication bus 1002 be used for realize these components it
Between connection communication.User interface 1003 can include display screen (Display), input block such as keyboard (Keyboard),
Optional user interface 1003 can also include wireline interface, the wave point of standard.Network interface 1004 can optionally include
Wireline interface, the wave point (such as WI-FI interfaces) of standard.Memory 1005 can be high-speed RAM memory or steady
Fixed memory (non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of
The storage device of aforementioned processor 1001.
It will be understood by those skilled in the art that the roaming device structure shown in Fig. 1 does not form the limit to roaming device
It is fixed, it can include than illustrating more or less parts, either combine some parts or different parts arrangement.
As shown in figure 1, it can be deposited as in a kind of memory 1005 of computer-readable storage medium including operating system, data
Module, network communication module, Subscriber Interface Module SIM and roving link changeover program are stored up, the network communication module can be to use
Family equipment provides network service.
The roaming device can be a kind of special device that can realize WLAN roving link handoff functionality,
Its hardware state can be set according to the actual requirements, and the present embodiment is not any limitation as to this；The user equipment can be user's end
End, such as：The equipment such as smart mobile phone, tablet personal computer, notebook computer or Intelligent bracelet, the present embodiment are not any limitation as to this.
In the roaming device shown in Fig. 1, network interface 1004 is mainly used in connecting user equipment, is carried out with user equipment
Data communicate, it may also be used for connection server, enter row data communication with server；Less radio-frequency 1006, it is wireless to be configured to transmitting
Radio frequency, Radio Link is established with WAP；User interface 1003 is mainly used in carrying out data interaction with user；The present invention is unrestrained
Processor 1001, memory 1005 in trip device can be arranged in roaming device, and the roaming device passes through processor
The roving link changeover program stored in 1001 calling memories 1005, and perform following operate：
Available WAP in current environment is searched for, obtains WAP to be connected；
Link is established respectively with the WAP to be connected, and a link is selected from the link as primary link
Enter row data communication, remaining link is as standby link；
When the communication quality for detecting the primary link is unsatisfactory for preparatory condition, a chain is chosen from the standby link
Road, and be that primary link carries out data communication by the link switching of selection.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
Available WAP in current environment is searched for, the logical of each WAP is obtained according to the WAP
Believe parameter；
According to the messaging parameter, the weighted signal strength value of the WAP is calculated；
By the weighted signal strength value compared with predetermined threshold value, according to comparative result from the WAP
Choose WAP to be connected.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
Preset weights corresponding to obtaining each messaging parameter and each messaging parameter, the weighted average of each messaging parameter is calculated,
And using the weighted signal strength value of the weighted average of calculating WAP as corresponding to.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
Link corresponding to the maximum WAP of the weighted signal strength value is chosen as primary link progress data to lead to
Letter, remaining link is as standby link.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
The messaging parameter of the primary link is obtained in real time, and calculates the current weighted signal strength value of the primary link；
When the current weighted signal strength value is no more than predetermined threshold value, assert that the communication quality of the primary link is discontented with
Sufficient preparatory condition.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
Messaging parameter corresponding to obtaining the WAP of each standby link connection, according to the messaging parameter, is calculated each standby
The current weighted signal strength value of the WAP of link connection；
Link where choosing the maximum WAP of current weighted signal strength value is used as Target Link, and described in general
Target Link switches to primary link to enter row data communication.
Further, processor 1001 can call the roving link changeover program stored in memory 1005, also perform
Operate below：
The first default radio frames of WAP transmission to link to be established are authenticated association and establish Radio Link.
The beneficial effect of the embodiment of the present invention is：Roaming device by searching for available WAP in current environment,
Obtain WAP to be connected；And link is established respectively with the WAP to be connected, select one from the link
Bar link enters row data communication as primary link, and remaining link is as standby link；Then according to the primary link and standby link,
The communication quality for detecting the primary link is unsatisfactory for preparatory condition, it is necessary to when carrying out roving link switching, from the standby link
One link of middle selection, and be that primary link carries out data communication by the link switching of selection, so as to solve current wireless local
During net system roaming link switching the problem of existing link down, packet loss, user terminal is set to switch in roving link
Data communication is not disrupted in journey, provides the user the network experience that reliable network service improves user.
Based on above-mentioned hardware configuration, roving link switching method embodiment of the present invention is proposed.
Reference picture 2, Fig. 2 are a kind of schematic flow sheet of roving link switching method first embodiment of the present invention.
In the present embodiment, it the described method comprises the following steps：
Step S10：Available WAP in current environment is searched for, obtains WAP to be connected；
It should be noted that the executive agent of the method for the present embodiment is roaming device, i.e. one kind can realize wireless office
The device of domain network roaming link switching function.
It should be understood that roaming device can be by being scanned to receive to a range of wireless signal of surrounding environment
Collect available WAP in current environment, its range size scanned can be configured according to specific demand, for example, will
Using roaming device position as the center of circle, radius 10m scope obtains available wireless in the range of being somebody's turn to do as default scanning range
Access point.
It should be noted that among the available WAP that roaming device searches, and not all available nothing
Line access point is all target access, for example, it may be possible to which existing situation is, available WAP itself, it is handled up or can
The number of terminals of access has practically already been achieved the limit, although searched at it is then available, can not be carried for roaming device
For reliable network service, therefore roaming device needs obtain some satisfactions from the available wireless access point searched and necessarily connected
The WAP of narrow bars part is as access point to be connected.
Further, in the embodiment of the present invention, roaming device provides wirelessly connecing for reliable network service in order to obtain
Access point, the roaming device can be by searching for available WAP in current environment, then according to the WAP
The messaging parameter of each WAP is obtained, and according to the messaging parameter, the weighted signal for calculating the WAP is strong
Angle value；By the weighted signal strength value compared with predetermined threshold value, selected according to comparative result from the WAP
Take WAP to be connected.
It is understood that after roaming device is searching the available wireless access point in current environment preset range,
The messaging parameter of each available wireless access point can be collected, the messaging parameter can include：Service set, basic service set
Mark, channel, signal intensity, noise figure, channel utilization rate and last discovery time etc.；Certainly, it is described logical in actual conditions
Letter parameter can also include being used for the relevant parameter for characterizing the other attributes of WAP, and this implementation is not any limitation as to this.
In the specific implementation, roaming device after the messaging parameter of each available wireless access point is got, can be according to advance
The weights of each messaging parameter of setting calculate the weighted average of the messaging parameter of corresponding WAP, and will calculate
Weighted signal strength of the weighted average gone out as the WAP, for example, roaming device gets available wireless access
Point A signal intensity is -50, and noise figure is -90, and WAP A letter can be calculated according to signal strength values and noise figure
Road ratio [(- 50)-(- 90)=40], then weight and other parameters got and correspondingly according to corresponding to the channel ratio
Weight calculation go out WAP A weighted signal strength value.
Certainly, weights corresponding to each messaging parameter are not unique, can be adjusted according to actual conditions, for example, working as
, can be by weights phase corresponding to signal intensity in the case that the channel utilization rate of available wireless access point is more or less the same in preceding environment
It should heighten to obtain actual weighted signal strength value, weights can be set according to actual conditions corresponding to specific messaging parameter
Fixed, the present embodiment is not any limitation as to this.
Further, in the embodiment of the present invention, roaming device is to obtain the company for the treatment of from the available wireless access point searched
The WAP connect, can by set weighted signal strength value corresponding to a predetermined threshold value and each WAP come
The available wireless access point is screened, obtains the WAP to be connected for the condition that meets, for example, the default threshold of setting
It is worth for 50, when the weighted signal strength value of a certain WAP is more than 50, then it is assumed that the WAP is the company for the treatment of
Connect WAP；As available wireless access point A, B, C, D, E and F be present around the discovery of a certain moment roaming device, it is computed
The weighted signal strength value for drawing them afterwards is respectively 30,35,48,51,67 and 74, then by above-mentioned weighted signal strength value with
Predetermined threshold value is compared, and the WAP to be connected finally obtained is D, E and F, described during specific implementation
Predetermined threshold value can also be set according to actual conditions, and the present embodiment is not any limitation as to this.
Step S20：Link is established respectively with the WAP to be connected, selects a link to make from the link
Data communication is carried out for primary link, remaining link is as standby link；
In the present embodiment, roaming device can launch multiple less radio-frequencies to establish chain with each WAP to be connected
Road, and provide reliable network clothes by selecting a link to be used as primary link from the link established to enter row data communication
Business, remaining link are then used as reserve link and performed across scan channel, the in advance operation such as association.
It should be noted that the primary link and standby link in the present embodiment are not the definition to link attribute, it is simply
It is easy to make a distinction the link being currently used in into row data communication with other links.In addition, in some special scenes, overflow
Trip device may only need to use single less radio-frequency to be roamed, for example, when the WAP for entering row data communication is (i.e. main
Link) be selected in the case of, the less radio-frequency can that residue establishes link is only done adjacent wireless of scanning collection and connect
Access point is used, and is not involved in roaming switch process, and therefore, the present embodiment is not any limitation as to the application scenarios of roaming device.
Further to improve the reliability of WLAN roving link switching, in the present embodiment, from the chain established
It when primary link is chosen in road, can according to the actual requirements select, for example, to ensure the quality of data communication, weighting letter may be selected
Link is as primary link corresponding to the maximum WAP of number intensity level；It is optional again or to ensure the speed of data communication
Signal intensity is higher and channel utilization rate is relatively low link is selected as primary link, during specific implementation, the selection side of primary link
Formula can according to the actual requirements depending on, the present embodiment is not any limitation as to this.
Step S30：When the communication quality for detecting the primary link is unsatisfactory for preparatory condition, selected from the standby link
A link is taken, and is that primary link carries out data communication by the link switching of selection.
It is understood that to ensure data communication quality, roaming device can be to currently entering the primary link of row data communication
Communication quality detection is carried out, for example, a detection cycle can be preset, to detect the communication quality of primary link, so as in main chain
It route in equipment fault, signal weaker or carries out link switching in time in the case of severe jamming being present, so as to ensures number
It will not be interrupted according to communication, prevent the generation of packet drop.
Further, in the embodiment of the present invention, roaming device can correspond to working as WAP by comparing primary link
The size of preceding weighted signal strength value and predetermined threshold value judges whether the communication quality of the primary link meets preparatory condition, if
The current weighted signal strength value is no more than predetermined threshold value, then assert that the communication quality of the primary link is unsatisfactory for default bar
Part.
The present embodiment calculates the primary link in the specific implementation, roaming device obtains the messaging parameter of primary link in real time
Current weighted signal strength value；And by current weighted signal strength value compared with threshold value set in advance, work as described
When preceding weighted signal strength value is no more than predetermined threshold value, assert that the communication quality of the primary link is unsatisfactory for preparatory condition, for example,
At a certain moment, roaming device calculates the current weighted signal strength value of primary link and is less than predetermined threshold value 50 for 40, then described in identification
The communication quality of primary link is unsatisfactory for preparatory condition, now just needs to choose a link from standby link, and by the chain of selection
Road switches to primary link to enter row data communication, and the predetermined threshold value can be set or be adjusted according to actual conditions.
Further, it is that the data that a better quality is remained in that after roaming device carries out link switching communicate, can
Select present communications best in quality from reserve link, for example, the standby link progress link switching that weighted signal strength value is maximum.
The present embodiment is in the specific implementation, roaming device obtains the ginseng that communicated corresponding to the WAP of each standby link connection
Number, according to the messaging parameter, calculate the current weighted signal strength value of the WAP of each standby link connection；Choose current
Link where the maximum WAP of weighted signal strength value is as Target Link, and based on the Target Link switched
Link enters row data communication.
It should be noted that no matter whether roaming device associates with WAP in this embodiment, WAP is all
Radio environment information can be fed back by the second default radio frames (i.e. wireless management frame) to roaming device, so as to enrich roaming dress
The neighbor radio access points information content collected is put, realizes more accurately roaming decisions.Wherein, the radio environment information bag
Include and be not only limited to：Channel utilization rate, noise figure, neighbor radio access points channel list etc..
, can be according to therein adjacent wireless after in the specific implementation, the roaming device receives these wireless management frames
Channel of access point list information carries out targetedly reducing useless channel switch time across scan channel；For example, roaming
Device, which is received in the neighbor radio access points channel list of WAP B feedbacks, includes WAP C, D and E, just
It can targetedly carry out across scan channel, that is, scanning WAP C, D and E, obtaining their messaging parameter, then basis
Channel utilization therein, noise figure optimize to the calculating process of WAP to be connected, reduce invalid unrestrained
Trip switching, so as to realize faster more accurately roam procedure.
In the embodiment of the present invention, roaming device is obtained to be connected by searching for available WAP in current environment
WAP；And link is established respectively with the WAP to be connected, a link conduct is selected from the link
Primary link enters row data communication, and remaining link is as standby link；Then it is described detecting according to the primary link and standby link
The communication quality of primary link is unsatisfactory for preparatory condition, it is necessary to when carrying out roving link switching, and one is chosen from the standby link
Link, and be that primary link carries out data communication by the link switching of selection, so as to solve current wireless local area network (WLAN) system roaming
During link switching the problem of existing link down, packet loss, lead to user terminal data in roving link handoff procedure
Letter is not disrupted, and provides the user the network experience that reliable network service improves user.
Reference picture 3, Fig. 3 are the schematic flow sheet of roving link switching method second embodiment of the present invention.Wherein, above-mentioned
On the basis of first embodiment, linear velocity is associated for accelerate roaming device and WAP, methods described also includes：
Step S201：The first default radio frames of WAP transmission to link to be established are authenticated association and establish nothing
Wired link.
It is understood that during roaming device and WAP establish link, the roaming device and nothing
It can be authenticated associating between line access point, after authentication associated success, the roaming device could be established with WAP
Radio Link enters row data communication.
Reference picture 4, Fig. 4 are to associate procedure chart of reaching the standard grade between wireless terminal and WAP in the prior art.It is existing
In technology, terminal (STA, roaming device) is after the Beacon frames of WAP (AP) transmission are received, to WAP
Certification request Auth req are sent, WAP can be sent after the Auth req of the terminal transmission are received to terminal to be recognized
Card response Auth resp, terminal send association request Assoc req after the authentication response is received, to WAP,
And after the associated response Assoc resp of WAP return are received, start to carry out 4-Way Handshake with WAP,
In the 4-Way Handshake, terminal and WAP by EAPOL-key messages (i.e. EAPOL-key1, EAPOL-key2,
EAPOL-key3 and EAPOL-key4) cipher key interaction is carried out, to ensure the security of data transfer (Protected data), four
It is secondary shake hands successfully after, terminal and WAP are completed to associate line process, enter row data communication.
Reference picture 5, Fig. 5 are that wireless terminal and WAP associate procedure chart of reaching the standard grade in second embodiment of the invention.
It is linear velocity on increasing terminal in the present embodiment with reference to Fig. 4, roaming device is receiving WAP (AP)
After the Beacon frames of transmission, by sending the described first default radio frames (i.e. Action- to the WAP of link to be established
Online frames), the WAP of link to be established is being received the described first default radio frames (Action-online frames)
Afterwards, authentication associated and 4-Way Handshake process is completed inside itself wireless driving, while roaming device is also in itself wireless driving
Above-mentioned authentication associated and 4-Way Handshake process is completed in inside, and is receiving the WAP feedback of the link to be established
After radio frames (Action-ready), Radio Link is established with the WAP.
The present embodiment terminal authentication interrelational form compares the authentication associated mode of terminal in 802.11 traditional agreements, no longer
Rely on the real message interaction mistake such as traditional Auth req, Auth resp, Assoc req, Assoc resp and EAPOL
Journey, so that terminal on-line time shortens to a millisecond rank from second rank, greatly improve wireless terminal and WAP
Between association on linear velocity.
Step S202：A link is selected to enter row data communication as primary link from the link, remaining link conduct
Standby link.
, it is necessary to therefrom select a link as primary link after roaming device and WAP link establishment success
Enter row data communication and reliable network service is provided, remaining link is then used as reserve link and performed across scan channel, in advance
The first operation such as association.
It should be noted that the present embodiment during specific implementation, can wirelessly drive in WAP and roaming device
Dynamic inside pre-sets above-mentioned interrelational form, and specific setting up procedure can be depending on actual conditions, and the present embodiment is not subject to this
Limitation.
The present embodiment proposes a kind of terminal authentication association process of safe and convenient, to replace 802.11 traditional agreements
Middle terminal is reached the standard grade flow, during terminal is authenticated association, by the described first default radio frames make roaming device and
WAP completes line process in virtual certification inside respective wireless driving, so that terminal on-line time is from second level
A millisecond rank is not shortened to, is greatly improved and is associated linear velocity between wireless terminal and WAP.
In addition, the embodiment of the present invention also proposes a kind of storage medium, roving link switching is stored with the storage medium
Program, following operation is realized when the roving link changeover program is executed by processor：
Available WAP in current environment is searched for, obtains WAP to be connected；
Link is established respectively with the WAP to be connected, and a link is selected from the link as primary link
Enter row data communication, remaining link is as standby link；
When the communication quality for detecting the primary link is unsatisfactory for preparatory condition, a chain is chosen from the standby link
Road, and be that primary link carries out data communication by the link switching of selection.
Further, following operation is also realized when roving link changeover program is executed by processor：
Available WAP in current environment is searched for, the logical of each WAP is obtained according to the WAP
Believe parameter；
According to the messaging parameter, the weighted signal strength value of the WAP is calculated；
By the weighted signal strength value compared with predetermined threshold value, according to comparative result from the WAP
Choose WAP to be connected.
Further, following operation is also realized when roving link changeover program is executed by processor：
Preset weights corresponding to obtaining each messaging parameter and each messaging parameter, the weighted average of each messaging parameter is calculated,
And using the weighted signal strength value of the weighted average of calculating WAP as corresponding to.
Further, following operation is also realized when roving link changeover program is executed by processor：
Link corresponding to the maximum WAP of the weighted signal strength value is chosen as primary link progress data to lead to
Letter, remaining link is as standby link.
Further, following operation is also realized when roving link changeover program is executed by processor：
The messaging parameter of the primary link is obtained in real time, and calculates the current weighted signal strength value of the primary link；
When the current weighted signal strength value is no more than predetermined threshold value, assert that the communication quality of the primary link is discontented with
Sufficient preparatory condition.
Further, following operation is also realized when roving link changeover program is executed by processor：
Messaging parameter corresponding to obtaining the WAP of each standby link connection, according to the messaging parameter, is calculated each standby
The current weighted signal strength value of the WAP of link connection；
Link where choosing the maximum WAP of current weighted signal strength value is used as Target Link, and described in general
Target Link switches to primary link to enter row data communication.
Further, following operation is also realized when roving link changeover program is executed by processor：
Default first radio frames of WAP transmission to link to be established are authenticated association and establish Radio Link.
The beneficial effect of the embodiment of the present invention is：Available WAP in current environment is searched for, obtains nothing to be connected
Line access point；And link is established respectively with the WAP to be connected, a link is selected from the link as master
Link enters row data communication, and remaining link is as standby link；Then according to the primary link and standby link, the master is being detected
The communication quality of link is unsatisfactory for preparatory condition, it is necessary to when carrying out roving link switching, and a chain is chosen from the standby link
Road, and be that primary link carries out data communication by the link switching of selection, so as to solve current wireless local area network (WLAN) system roaming chain
The problem of link down present in the handoff procedure of road, packet loss, user terminal data in roving link handoff procedure are made to communicate
It is not disrupted, provides the user the network experience that reliable network service improves user.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or system institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or system.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal equipment (can be mobile phone, computer, clothes
Be engaged in device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (11)
1. a kind of roving link switching method, it is characterised in that the described method comprises the following steps：
Available WAP in current environment is searched for, obtains WAP to be connected；
Link is established respectively with the WAP to be connected, selects a link to be carried out as primary link from the link
Data communicate, and remaining link is as standby link；
When the communication quality for detecting the primary link is unsatisfactory for preparatory condition, a link is chosen from the standby link,
And the link switching of selection is subjected to data communication for primary link.
2. roving link switching method as claimed in claim 1, it is characterised in that available nothing in the search current environment
Line access point, WAP step to be connected is obtained, is specifically included：
Available WAP in current environment is searched for, the communication that each WAP is obtained according to the WAP is joined
Number；
According to the messaging parameter, the weighted signal strength value of the WAP is calculated；
By the weighted signal strength value compared with predetermined threshold value, chosen according to comparative result from the WAP
WAP to be connected.
3. roving link switching method as claimed in claim 2, it is characterised in that the messaging parameter includes：Services set mark
At least one of in knowledge, Basic Service Set Identification, channel and signal intensity；
Correspondingly, it is described according to the messaging parameter, the weighted signal strength value step of the WAP is calculated, is specifically wrapped
Include：
Preset weights corresponding to obtaining each messaging parameter and each messaging parameter, the weighted average of each messaging parameter is calculated, and will
The weighted signal strength value of the weighted average of calculating WAP as corresponding to.
4. roving link switching method as claimed in claim 3, it is characterised in that described that a chain is selected from the link
Row data communication is entered in road as primary link, and remaining link specifically includes as standby link step：
Link corresponding to choosing the maximum WAP of the weighted signal strength value enters row data communication as primary link, its
Remaining link is as standby link.
5. roving link switching method as claimed in claim 4, it is characterised in that described to detect the logical of the primary link
The step of letter quality is unsatisfactory for preparatory condition, specifically includes：
The messaging parameter of the primary link is obtained in real time, and calculates the current weighted signal strength value of the primary link；
When the current weighted signal strength value is no more than predetermined threshold value, assert the primary link communication quality be unsatisfactory for it is pre-
If condition.
6. roving link switching method as claimed in claim 5, it is characterised in that described that one is chosen from the standby link
Link, and be that primary link carries out data communication steps by the link switching being selected, specifically include：
Messaging parameter corresponding to obtaining the WAP of each standby link connection, according to the messaging parameter, calculates each standby link
The current weighted signal strength value of the WAP of connection；
The link where the maximum WAP of current weighted signal strength value is chosen as Target Link, and by the target
Link switching is that primary link carries out data communication.
7. roving link switching method as claimed in claim 6, it is characterised in that the described and WAP to be connected
Link step is established respectively, is specifically included：
The first default radio frames of WAP transmission to link to be established are authenticated association and establish Radio Link.
8. the roving link switching method as described in any one of claim 1~7, it is characterised in that the WAP exists
When current wireless protocol is constant, radio environment information is fed back by the second default radio frames, the radio environment information includes：Letter
At least one of in road utilization rate, noise figure and neighbor radio access points channel list.
9. a kind of mobile terminal, it is characterised in that the mobile terminal includes：
The roving link switching journey that memory, processor and being stored in can be run on the memory and on the processor
Sequence, the roving link changeover program are arranged for carrying out the roving link switching method as any one of claim 1 to 7
The step of.
10. a kind of network modules, it is characterised in that the network modules include：
The roving link switching journey that memory, processor and being stored in can be run on the memory and on the processor
Sequence, the roving link changeover program are arranged for carrying out the roving link switching method as any one of claim 1 to 7
The step of.
11. a kind of storage medium, it is characterised in that roving link changeover program, the roaming are stored with the storage medium
The roving link switching method as any one of claim 1 to 7 is realized when link switching program is executed by processor
Step.
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