CN105916180A - Rapid two-layer switching method with moving rate self-adaptation function - Google Patents
Rapid two-layer switching method with moving rate self-adaptation function Download PDFInfo
- Publication number
- CN105916180A CN105916180A CN201610377788.7A CN201610377788A CN105916180A CN 105916180 A CN105916180 A CN 105916180A CN 201610377788 A CN201610377788 A CN 201610377788A CN 105916180 A CN105916180 A CN 105916180A
- Authority
- CN
- China
- Prior art keywords
- mobile terminal
- signal strength
- rssi
- received signal
- trigger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a rapid two-layer switching method with a moving rate self-adaptation function. The method comprises the steps that: 1, a mobile terminal obtains the current moving rate through a rate sensor module and obtains the intensity parameter of current received signals through a wireless network card; 2, a trigger parameter is calculated according to the current rate information; 3, the intensity parameter of the current received signals is compared with the trigger parameter obtained by calculation, a step 4 is executed if the condition is met; 4, if the parameters in the step 3 accord with the conditions, trigger switching operation is carried out; and 5, the mobile terminal accesses to known channels, detects access points on the channels and selects the access point higher in signal intensity as the access point to be connected. According to the invention, the low-cost sensor is used to obtain the reliable rate information and is applied to trigger switching strategy of the mobile terminal, the reliable and rapid two-layer switching process is realized, the packet loss probability in the switching process is lowered under the condition that the reliable connection is ensured, and the popularization is relatively good.
Description
Technical field
The present invention relates to wireless communication technology field, there is rate travel certainly in particular to one
The quick two layers of changing method adapted to.
Technical background
Along with the fast development of wireless communication technology, excellent for communication bandwidth and communication distance
Change scheme is gradually promoted come also with various establishment of standard.But in order to realize more
Wide wireless coverage, increasing WAP is deployed in public territory,
Therefore mobile terminal switching between multiple WAPs just along with user movement and frequently
Numerous generation.Not to two layers occurred between access points in traditional WLAN standard
Handoff procedure is defined, and by wireless network card production firm autonomous Design handover scheme, just
The wireless network card production firm being traditional have selected single received signal strength as triggering
The thresholding of switching, and is relatively fixed, therefore when terminal with different rate travels multiple
When moving between access point, its fixing triggering handoff threshold seriously limits switching efficiency, in
It is to use adaptive triggering handoff threshold method the most significant in handoff procedure.
A kind of based on motion prediction two layers of side of being switched fast such as Patent No. 101902794
Method, the method to the distance of vehicle and calculates pre-cut by calculating each access point in data base
Changing the triggering moment, the access point of final chosen distance minimum is as down hop access point.Due to
The method is applied to possess the car of car-mounted terminal and roadside node and data base and networks in network,
Range of application is narrow, and promotional value is low.
Such as document Qian H, Chen B, Qin X.A Novel Mobility Management
Protocol Supporting Network Seamless Roaming[J].Journal of
Networks, 2010,5 (3): 367-374 propose a kind of change according to rate travel triggers switching
The algorithm of condition, this algorithm needs constantly to obtain the moving direction of terminal and the angle of access point
Information, calculates the minimum signal strength value under this speed and with this according to speed and angle information
As triggering judgment condition.It is more difficult and accurate owing to actual scene obtaining angle information
Spending low, therefore the program has some limitations on promoting.
Additionally, the switching based on speed perception being applied in the Vertical Handover of heterogeneous network is calculated
Method can automatically adjust triggering handoff threshold to adapt to different moving velocity of terminal, effectively carry
High Vertical Handover efficiency, although algorithm has abandoned speed and the coordinate information of mobile terminal, and
It is to utilize history to measure received signal strength data to characterize the velocity variations of terminal, and with this
Predict the received signal strength information at lower a moment, improve the accurate judgement triggering switching time,
But this algorithm is mainly used in heterogeneous network, in the homogeneous network described in this patent
Between multiple WAPs two layers switch and inapplicable.
Summary of the invention
Present invention aim to provide one to have adaptive quick two layers of rate travel
Changing method, the method can trigger switching door according to the rate travel self-adaptative adjustment of terminal
Limit, coordinates the auxiliary of distributed channel allocation strategy, reaches to reduce handover delay, and raising is cut
Change the purpose of efficiency.
For realizing this purpose, designed by the present invention, there is rate travel adaptive quick two
Layer changing method, it is characterised in that it comprises the following steps:
Step 1: the mobile terminal access rate sensor in wireless network, due to wireless network
In the acceleration a of mobile terminal characterize motion of mobile terminals speed v in wireless network
Change speed, i.e. a=dv/dt, therefore obtain the acceleration a of mobile terminal when rate sensor
After, velocity magnitude is to acceleration integration in certain time interval T, can be obtained by following formula:
Step 2: after being calculated the rate information of mobile terminal, needs to calculate this speed
The triggering signal strength threshold that rate is corresponding, has two WAPs in handover procedure
Received signal strength be changed to, mobile terminal, will respectively in time moving to the other end for one section
Experience received signal strength, by the process changed from weak to strong again that dies down by force, defines RSSItriggerFor triggering
Received signal strength threshold value during scanning, RSSIrangeEffective coverage range for WAP
Corresponding received signal strength threshold value, dtriggerFor mobile terminal during driver sweep to wireless access
The distance of point, drangeFor the effective coverage range of WAP, i.e. when mobile terminal is to wireless
The distance of access point is more than drangeTime, owing to signal intensity now is not enough to provide number reliably
According to communication thus occur that disconnect shows.Therefore Δ d can represent handoff procedure safety away from
From:
Δ d=drange-dtrigger
Owing under free environments, the received signal strength RSSI numerical value of mobile terminal is obeyed:
RSSI=M-10nlogd+Xσ
Wherein, d is the distance that terminal arrives WAP, and M represents sending out of near-earth reference distance
Penetrating power attenuation value, n is path loss index, M Yu n is the parameter with environmental correclation,
When environment one timing, its numerical value is fixed, XσBe obey standard deviation be σ zero-mean gaussian with
The stochastic variable of machine distribution, RSSI numerical value is received signal strength indicator value；
When mobile terminal detects that its received signal strength arrives RSSItriggerTime, trigger mobile whole
End performs the scanning process of handover, and selects scanning after neighboring access point selects
Good node is authenticated and re-association, if mobile terminal is with speed v linear uniform motion,
Mobile terminal is a length of Δ t when beginning driver sweep to re-association is successful, then only when mobile
Terminal trigger switching after handoff procedure linear movement distance less than Δ d could meet from
Handover is completed before opening the coverage of current access point, it may be assumed that
Δd≥v·Δt
Therefore, obtain triggering received signal strength threshold value RSSI of switchingtriggerObedience following formula:
RSSItrigger≥M-10nlog(drange-v·Δt)
Step 3: when terminal calculates RSSI according to rate traveltriggerAfter, need persistently to obtain and work as
Front received signal strength, owing to existing 1 in received signal strength expression formula in step 2
The stochastic variable of average gaussian random distribution, i.e. exists the brightest by the RSSI that network interface card obtains
Aobvious shake, it is therefore necessary to the RSSI value gathered is processed, to avoid its transition to lead
The false triggering caused or repeated trigger handover operation, concrete operations flow process is:
First, set up and comprise the set of current rssi measurement value and n-1 historical measurements:
DRSSI{DRSSI0,DRSSI1,DRSSI2···DRSSIn-1}；
Then, n weight set corresponding to rssi measurement value is set up:
W{W0,W1,W2···Wn-1, wherein
According to equation below, current measurement value is carried out excellent further according to RSSI historical measurements
Changing, the received signal strength after optimization is DRSSI:
DRSSI=DRSSI{DRSSI0,DRSSI1,DRSSI2···DRSSIn-1}*W{W0,W1,W2···Wn-1}
Step 4: mobile terminal is obtaining triggering received signal strength threshold value RSSI of switchingtrigger
After threshold value, the received signal strength DRSSI after the current optimization obtained in integrating step 3, will
Both compare, if current received signal strength is more than triggering switching received signal strength
During threshold value, the most persistently obtain current received signal strength, the most i.e. perform step 5；
Step 5: mobile terminal triggers when performing scanning, needs successively to access two different nothings
Line channel, and send probe requests thereby the most on two channels, wait reply to be detected, detection
Replying message as the WAP response to probe request message, it is wireless that message contains this
The signal strength information of access point.Mobile terminal connects according to wireless on two channels received
The detection of access point replies message, and selects the access point that signal intensity is stronger, connects as to be connected
Access point, i.e. completes the adaptive quick two layers of switching of rate travel.
Step 6: the mobile terminal scanned stage have selected preferably after WAP, needs
Completing certification with re-association flow process to continue data transmission, its process includes link authentication, connects
Entering certification, key agreement, re-association and data to forward, mobile terminal passes through open systems
Certification realizes link authentication, only just can connect to WAP after completing link authentication,
Hereafter in access network, accessing and receiving network data, this process has needed access authentication,
This process have employed access authentication technique based on 802.1X, and key agreement is for negotiating
Interim conversation key, is applied to the Data Encryption Transmission of communicating pair by it.
Step 7: when mobile terminal is when performing scan operation, receipts can be linked on other channel
Send out data, therefore will appear from packet loss with the data transmission between the WAP currently associated existing
As, for solving this problem, first terminal sends service to the WAP of current association
Suspension data frame, after WAP receives service suspension data frame, caching will be sent to
The data of terminal, after standby communication terminal is associated with new WAP, then by data cached
It is sent to new WAP by the data transmission mechanism between WAP and is transmitted to
Terminal, it is achieved data update and ensure that reliable data are transmitted, it is to avoid packet loss in handoff procedure
The generation of phenomenon.
Contrasting with existing technical scheme, the technical scheme that this programme is provided has following excellent
Point:
1, relative to using RSSI as triggering the algorithm switching reference standard, the present invention utilizes
The history rssi measurement value of weighting is optimized process to up-to-date measured value, in this, as reference
Standard, to avoid because RSSI shakes the unnecessary switching phenomenon caused.
2, the rate travel adaptive triggering switch decision threshold algorithm that has of design depends on
Inertial sensor and received signal strength historical data, contrast other location-based triggerings and sentence
Certainly threshold algorithm has higher precision and faster response speed.
Accompanying drawing explanation
Fig. 1 is quick two layers of handover network topological structure schematic diagram in the present invention；
Fig. 2 is that in the present invention, quick two layers of switching perform flow chart；
Fig. 3 be the present invention switching model in the graph of a relation of signal intensity and distance；
Fig. 4 is the first received signal strength and the graph of a relation of distance in the present invention；
Second received signal strength and the graph of a relation of distance in the present invention of Fig. 5 position；
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
First the application scenarios of the inventive method is illustrated.Such as Fig. 1
Quick two layers of handover network topological structure schematic diagram, wherein mobile terminal, fixed terminal,
Monitor node and all use notebook computer, between mobile terminal and fixed terminal, carry out two-way
Letter, uses router to connect three WAPs through three netting twines, because WAP is same
Being in same LAN, therefore mobile terminal will when moving in shown wireless coverage
There are two layers of switching.The method of the present invention is ensuring that mobile terminal is in different rate travels
In the case of can switch fast and efficiently operation.
One has the adaptive quick two layers of changing method of rate travel, it is characterised in that
It comprises the following steps:
Step 1: the mobile terminal access rate sensor in wireless network (adopt by rate sensor
Realize with the six-axle acceleration gyroscope meter MPU6050 of low-power consumption), due in wireless network
The acceleration a of mobile terminal characterize the change of the motion of mobile terminals speed v in wireless network
Change speed, i.e. a=dv/dt, therefore after rate sensor obtains the acceleration a of mobile terminal,
Velocity magnitude is to acceleration integration in certain time interval T, can be obtained by following formula:
Step 2: after being calculated the rate information of mobile terminal, needs to calculate this speed
The triggering signal strength threshold that rate is corresponding, has two WAPs in handover procedure
Received signal strength be changed to, shown in Fig. 3, mobile terminal moves to the other end from one section
Time, received signal strength will be experienced respectively by the process changed from weak to strong again that dies down by force, definition
RSSItriggerFor received signal strength threshold value during driver sweep, RSSIrangeFor WAP
The received signal strength threshold value that effective coverage range is corresponding, dtriggerEnd is moved during for driver sweep
End arrives the distance of WAP, drangeFor the effective coverage range of WAP, i.e. work as shifting
Move the terminal distance to WAP more than drangeTime, owing to signal intensity now is not enough to
Reliable data communication is provided thus occurs that disconnect shows.Therefore Δ d can represent switching
The safe distance of process:
Δ d=drange-dtrigger
Owing under free environments, the received signal strength RSSI numerical value of mobile terminal is obeyed:
RSSI=M-10nlogd+Xσ
Wherein, d is the distance that terminal arrives WAP, and M represents sending out of near-earth reference distance
Penetrating power attenuation value, n is path loss index, M Yu n is the parameter with environmental correclation,
When environment one timing, its numerical value is fixed, XσBe obey standard deviation be σ zero-mean gaussian with
The stochastic variable of machine distribution, RSSI numerical value is received signal strength indicator value；
When mobile terminal detects that its received signal strength arrives RSSItriggerTime, trigger mobile whole
End performs the scanning process of handover, and selects scanning after neighboring access point selects
Good node is authenticated and re-association, if mobile terminal is with speed v linear uniform motion,
Mobile terminal is a length of Δ t when beginning driver sweep to re-association is successful, then only when mobile
Terminal trigger switching after handoff procedure linear movement distance less than Δ d could meet from
Handover is completed before opening the coverage of current access point, it may be assumed that
Δd≥v·Δt
Therefore, obtain triggering received signal strength threshold value RSSI of switchingtriggerObedience following formula:
RSSItrigger≥M-10nlog(drange-v·Δt)
Step 3: when terminal calculates RSSI according to rate traveltriggerAfter, need persistently to obtain and work as
Front received signal strength, owing to existing 1 in received signal strength expression formula in step 2
The stochastic variable of average gaussian random distribution, i.e. exists the brightest by the RSSI that network interface card obtains
Aobvious shake, as shown in Figure 4, it is therefore necessary to the RSSI value gathered is processed, with
Avoiding false triggering or repeated trigger handover operation that its transition causes, concrete operations flow process is:
First, set up and comprise the set of current rssi measurement value and n-1 historical measurements:
DRSSI{DRSSI0,DRSSI1,DRSSI2···DRSSIn-1}；
Then, n weight set corresponding to rssi measurement value is set up:
W{W0,W1,W2···Wn-1, wherein
According to equation below, current measurement value is carried out excellent further according to RSSI historical measurements
Changing, the received signal strength after optimization is DRSSI:
DRSSI=DRSSI{DRSSI0,DRSSI1,DRSSI2···DRSSIn-1}*W{W0,W1,W2···Wn-1}
Received signal strength after optimization is represented by DRSSI, works as n=10, W0When=0.8, obtain
Result as shown in Figure 5, from the figure, it can be seen that the historical measurement data optimization being weighted
After RSSI value closer to RSSI theoretical value so that it is have more credibility；
Step 4: mobile terminal is obtaining triggering received signal strength threshold value RSSI of switchingtrigger
After threshold value, the received signal strength DRSSI after the current optimization obtained in integrating step 3, will
Both compare, if current received signal strength is more than triggering switching received signal strength
During threshold value, the most persistently obtain current received signal strength, the most i.e. perform step 5；
Step 5: mobile terminal triggers when performing scanning, needs successively to access two different nothings
Line channel, and send probe requests thereby the most on two channels, wait reply to be detected, detection
Replying message as the WAP response to probe request message, it is wireless that message contains this
The signal strength information of access point.Mobile terminal connects according to wireless on two channels received
The detection of access point replies message, and selects the access point that signal intensity is stronger, connects as to be connected
Access point, i.e. completes the adaptive quick two layers of switching of rate travel.
Step 6: the mobile terminal scanned stage have selected preferably after WAP, needs
Completing certification as shown in Figure 2 with re-association flow process to continue data transmission, its process includes
Link authentication, access authentication, key agreement, re-association and data forward, mobile terminal
Realize link authentication by open system authentication, only could connect after completing link authentication
To WAP, hereafter in access network, accessing and receiving network data, this process needs
Access authentication to be completed, this process have employed access authentication technique based on 802.1X, key
Negotiation is for negotiating interim conversation key, and it is applied to the data encryption of communicating pair
Transmission.
Step 7: when mobile terminal is when performing scan operation, receipts can be linked on other channel
Send out data, therefore will appear from packet loss with the data transmission between the WAP currently associated existing
As, for solving this problem, first terminal sends service to the WAP of current association
Suspension data frame, after WAP receives service hang-up (service suspend) Frame,
Caching will be sent to the data of terminal, after standby communication terminal is associated with new WAP,
It is sent to new wireless connect by the data transmission mechanism between WAP again by data cached
Access point is also transmitted to terminal, it is achieved data update and ensure that reliable data are transmitted, it is to avoid cut
The generation of packet loss phenomenon during changing.
In technique scheme, in described step 1, the mobile terminal in wireless network passes through
USB interface access rate sensor.
The step 1 of technique scheme) in, rate sensor mould based on acceleration transducer
Block utilizes and is integrated obtaining current rate information, at wireless network card to acceleration information
Physical layer information contains received signal strength information, and utilizes weighting historical measurement data
It is smoothed receiving data.
The step 2 of technique scheme) in, rate information calculate and trigger switching reception signal
The method of intensity threshold parameter, make use of distance and reception in log-distance path loss model model
The relation of signal intensity, is converted into the parameter relevant with rate travel, with this simultaneously by distance
Achieve the direct correlation of speed and received signal strength threshold parameter, and then complete movement
The self adaptation of speed.
The step 5 of technique scheme) in, owing in network, each WAP have employed
Distributed channel allocation strategy, possesses channel isolation, therefore moves between neighbor radio access points
Dynamic terminal is only used on known two channels detection, is greatly shortened scanning delay.
The step 6 of technique scheme) in, reliable authentication process is recognized by link authentication, access
Card and three step compositions of key agreement.
The step 7 of technique scheme) in, mobile terminal triggers when being scanned operation, with
Caching will be mail to the data of mobile terminal by the access point of its association, when completing re-association behaviour
When making, new access point obtains data cached at old access point and is again forwarded to mobile whole
End, it is to avoid the packet loss phenomenon in handoff procedure.
In technique scheme, distribute normalization weights to received signal strength historical measurements,
And according to this weighting parameter, the received signal strength of up-to-date measurement is optimized, after optimization
Result can improve the problem that received signal strength fluctuating margin is big so that it is as handover trigger
Parameter has more credibility.
The content that this specification is not described in detail belongs to known to professional and technical personnel in the field
Prior art.
Claims (4)
1. one kind has the adaptive quick two layers of changing method of rate travel, it is characterised in that
It comprises the following steps:
Step 1: the mobile terminal access rate sensor in wireless network, due to wireless network
In the acceleration a of mobile terminal characterize motion of mobile terminals speed v in wireless network
Change speed, i.e. a=dv/dt, therefore obtain the acceleration a of mobile terminal when rate sensor
After, velocity magnitude is to acceleration integration in certain time interval T, can be obtained by following formula:
Step 2: after being calculated the rate information of mobile terminal, needs to calculate this speed
The triggering signal strength threshold that rate is corresponding, has two WAPs in handover procedure
Received signal strength be changed to, mobile terminal, will respectively in time moving to the other end for one section
Experience received signal strength, by the process changed from weak to strong again that dies down by force, defines RSSItriggerFor triggering
Received signal strength threshold value during scanning, RSSIrangeEffective coverage range for WAP
Corresponding received signal strength threshold value, dtriggerFor mobile terminal during driver sweep to wireless access
The distance of point, drangeFor the effective coverage range of WAP, i.e. when mobile terminal is to wireless
The distance of access point is more than drangeTime, owing to signal intensity now is not enough to provide number reliably
According to communication thus occur that disconnect shows.Therefore Δ d can represent handoff procedure safety away from
From:
Δ d=drange-dtrigger
Owing under free environments, the received signal strength RSSI numerical value of mobile terminal is obeyed:
RSSI=M-10nlogd+Xσ
Wherein, d is the distance that terminal arrives WAP, and M represents sending out of near-earth reference distance
Penetrating power attenuation value, n is path loss index, M Yu n is the parameter with environmental correclation,
When environment one timing, its numerical value is fixed, XσBe obey standard deviation be σ zero-mean gaussian with
The stochastic variable of machine distribution, RSSI numerical value is received signal strength indicator value；
When mobile terminal detects that its received signal strength arrives RSSItriggerTime, trigger mobile whole
End performs the scanning process of handover, and selects scanning after neighboring access point selects
Good node is authenticated and re-association, if mobile terminal is with speed v linear uniform motion,
Mobile terminal is a length of Δ t when beginning driver sweep to re-association is successful, then only when mobile
Terminal trigger switching after handoff procedure linear movement distance less than Δ d could meet from
Handover is completed before opening the coverage of current access point, it may be assumed that
Δd≥v·Δt
Therefore, obtain triggering received signal strength threshold value RSSI of switchingtriggerObedience following formula:
RSSItrigger≥M-10nlog(drange-v·Δt)
Step 3: when terminal calculates RSSI according to rate traveltriggerAfter, need persistently to obtain and work as
Front received signal strength, owing to existing 1 in received signal strength expression formula in step 2
The stochastic variable of average gaussian random distribution, i.e. exists the brightest by the RSSI that network interface card obtains
Aobvious shake, it is therefore necessary to the RSSI value gathered is processed, to avoid its transition to lead
The false triggering caused or repeated trigger handover operation, concrete operations flow process is:
First, set up and comprise the set of current rssi measurement value and n-1 historical measurements:
DRSSI{DRSSI0,DRSSI1,DRSSI2…DRSSIn-1}；
Then, n weight set corresponding to rssi measurement value is set up:
W{W0,W1,W2…Wn-1, wherein
According to equation below, current measurement value is carried out excellent further according to RSSI historical measurements
Changing, the received signal strength after optimization is DRSSI:
DRSSI=DRSSI{DRSSI0,DRSSI1,DRSSI2…DRSSIn-1}*W{W0,W1,W2…Wn-1}
Step 4: mobile terminal is obtaining triggering received signal strength threshold value RSSI of switchingtrigger
After threshold value, the received signal strength DRSSI after the current optimization obtained in integrating step 3, will
Both compare, if current received signal strength is more than triggering switching received signal strength
During threshold value, the most persistently obtain current received signal strength, the most i.e. perform step 5；
Step 5: mobile terminal triggers when performing scanning, needs successively to access two different nothings
Line channel, and send probe requests thereby the most on two channels, wait reply to be detected, detection
Replying message as the WAP response to probe request message, it is wireless that message contains this
The signal strength information of access point.Mobile terminal connects according to wireless on two channels received
The detection of access point replies message, and selects the access point that signal intensity is stronger, connects as to be connected
Access point, i.e. completes the adaptive quick two layers of switching of rate travel.
The most according to claim 1 have the adaptive quick two layers of switching of rate travel
Method, it is characterised in that: also include step 6 after described step 5: the scanned rank of mobile terminal
Section have selected preferably after WAP, has needed certification and re-association flow process to continue
Data transmit, its process include link authentication, access authentication, key agreement, re-association with
And data forward, mobile terminal realizes link authentication by open system authentication, only complete
Just can connect to WAP after becoming link authentication, hereafter in access network, access and connect
Receiving network data, this process has needed access authentication, and this process have employed based on 802.1X
Access authentication technique, key agreement is for negotiating interim conversation key, by application
Data Encryption Transmission in communicating pair.
The most according to claim 2 have the adaptive quick two layers of switching of rate travel
Method, it is characterised in that: also include step 7 after described step 6: when mobile terminal is performing
During scan operation, transceiving data on other channel can be linked into, therefore with the nothing currently associated
Data transmission between line access point will appear from packet loss phenomenon, and for solving this problem, terminal is first
First the WAP to current association sends service suspension data frame, and WAP receives
After service suspension data frame, caching will be sent to the data of terminal, and standby communication terminal associates
After new WAP, then transmitted data cached by the data between WAP
Mechanism is sent to new WAP and is transmitted to terminal, it is achieved data update and ensure can
The data transmission leaned on, it is to avoid the generation of packet loss phenomenon in handoff procedure.
The most according to claim 1 have the adaptive quick two layers of switching of rate travel
Method, it is characterised in that: in described step 1, the mobile terminal in wireless network passes through USB
Interface access rate sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377788.7A CN105916180B (en) | 2016-05-31 | 2016-05-31 | A kind of quick two layer switching method adaptive with rate travel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377788.7A CN105916180B (en) | 2016-05-31 | 2016-05-31 | A kind of quick two layer switching method adaptive with rate travel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105916180A true CN105916180A (en) | 2016-08-31 |
| CN105916180B CN105916180B (en) | 2019-03-26 |
Family
ID=56741884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610377788.7A Expired - Fee Related CN105916180B (en) | 2016-05-31 | 2016-05-31 | A kind of quick two layer switching method adaptive with rate travel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105916180B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604280A (en) * | 2017-01-06 | 2017-04-26 | 国网新疆电力公司电力科学研究院 | Handover method of wireless network |
| CN107534882A (en) * | 2016-03-31 | 2018-01-02 | 慧与发展有限责任合伙企业 | Reference access point in a network when a predetermined condition is satisfied（AP）Equivalent isotropically radiated power（EIRP）Calculating |
| CN108235384A (en) * | 2016-12-12 | 2018-06-29 | 华为技术有限公司 | A kind of wireless network switching method and device |
| CN111211823A (en) * | 2018-11-22 | 2020-05-29 | 北京松果电子有限公司 | Method and apparatus for switching transmission antenna, storage medium, and electronic device |
| CN113253725A (en) * | 2021-05-11 | 2021-08-13 | 北京京东乾石科技有限公司 | Robot path planning method and device, storage medium and electronic equipment |
| CN114938529A (en) * | 2022-07-25 | 2022-08-23 | 成都伍零三科技集团有限公司 | Data transmission method, system, electronic device and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521924A (en) * | 2009-04-27 | 2009-09-02 | 杭州华三通信技术有限公司 | Switching method and device of wireless local area network |
| CN103596231A (en) * | 2013-06-20 | 2014-02-19 | 北京邮电大学 | Vertical switching method and vertical switching device |
| CN103686896A (en) * | 2013-12-12 | 2014-03-26 | 广州市地下铁道总公司 | Method for switching wireless access points and terminal |
| CN103999511A (en) * | 2011-12-08 | 2014-08-20 | 苹果公司 | Mechanisms to improve mobile device roaming in wireless networks |
-
2016
- 2016-05-31 CN CN201610377788.7A patent/CN105916180B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521924A (en) * | 2009-04-27 | 2009-09-02 | 杭州华三通信技术有限公司 | Switching method and device of wireless local area network |
| CN103999511A (en) * | 2011-12-08 | 2014-08-20 | 苹果公司 | Mechanisms to improve mobile device roaming in wireless networks |
| CN103596231A (en) * | 2013-06-20 | 2014-02-19 | 北京邮电大学 | Vertical switching method and vertical switching device |
| CN103686896A (en) * | 2013-12-12 | 2014-03-26 | 广州市地下铁道总公司 | Method for switching wireless access points and terminal |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534882A (en) * | 2016-03-31 | 2018-01-02 | 慧与发展有限责任合伙企业 | Reference access point in a network when a predetermined condition is satisfied（AP）Equivalent isotropically radiated power（EIRP）Calculating |
| CN107534882B (en) * | 2016-03-31 | 2020-12-01 | 慧与发展有限责任合伙企业 | Calculation of EIRP of reference AP in network when predetermined condition is satisfied |
| CN108235384A (en) * | 2016-12-12 | 2018-06-29 | 华为技术有限公司 | A kind of wireless network switching method and device |
| CN108235384B (en) * | 2016-12-12 | 2020-10-16 | 华为技术有限公司 | Wireless network switching method and device |
| US11246076B2 (en) | 2016-12-12 | 2022-02-08 | Huawei Technologies Co., Ltd. | Wireless network handover method and apparatus based on distance change between terminal and access points |
| CN106604280A (en) * | 2017-01-06 | 2017-04-26 | 国网新疆电力公司电力科学研究院 | Handover method of wireless network |
| CN111211823A (en) * | 2018-11-22 | 2020-05-29 | 北京松果电子有限公司 | Method and apparatus for switching transmission antenna, storage medium, and electronic device |
| CN111211823B (en) * | 2018-11-22 | 2023-10-17 | 北京小米松果电子有限公司 | Method and device for switching transmitting antenna, storage medium and electronic equipment |
| CN113253725A (en) * | 2021-05-11 | 2021-08-13 | 北京京东乾石科技有限公司 | Robot path planning method and device, storage medium and electronic equipment |
| CN114938529A (en) * | 2022-07-25 | 2022-08-23 | 成都伍零三科技集团有限公司 | Data transmission method, system, electronic device and medium |
| CN114938529B (en) * | 2022-07-25 | 2022-11-11 | 成都伍零三科技集团有限公司 | Data transmission method, system, electronic device and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105916180B (en) | 2019-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105916180A (en) | Rapid two-layer switching method with moving rate self-adaptation function | |
| Goyal et al. | Handover optimization scheme for LTE-Advance networks based on AHP-TOPSIS and Q-learning | |
| EP2449812B1 (en) | Infrastructure assisted network transition | |
| CN109275168B (en) | System and method for optimizing switching parameter settings of terminals on public transportation platform | |
| CN102724719B (en) | Handover method for mobile communication system of high-speed railway | |
| CN113259999B (en) | Method and device for configuring network resources | |
| CN107302778B (en) | Vertical downward switching judgment method between macro base station and home base station | |
| CN111565062B (en) | Beam switching method and device | |
| Oguma et al. | Proactive handover based on human blockage prediction using RGB-D cameras for mmWave communications | |
| JP4928531B2 (en) | Wireless communication terminal, wireless communication system, wireless communication control method | |
| CN106657209A (en) | OBU and RSU fast switching method based on VANET | |
| CN113038525B (en) | Cell pre-switching method in 5G system | |
| US11974182B2 (en) | Systems and methods of predictive handoff | |
| Sadiq et al. | A smart handover prediction system based on curve fitting model for Fast Mobile IPv6 in wireless networks | |
| CN102711199B (en) | Double-antenna handover system in GSM-R (global system for mobile communication for railway) network and method thereof | |
| CN108601053A (en) | Wireless network switching optimization method under a kind of high-speed railway scene | |
| Wu et al. | Reducing handoff delay of wireless access in vehicular environments by artificial neural network-based geographical fingerprint | |
| CN106792983B (en) | A kind of connection control method and system | |
| CN103476080A (en) | Self-adaption vertical handoff method based on residence time | |
| Chen et al. | Location-based handover decision algorithm in LTE networks under high-speed mobility scenario | |
| Almulla et al. | A fast location-based handoff scheme for vehicular networks | |
| WO2015035958A1 (en) | Method, user equipment, and macro base station for starting inter-frequency measurement | |
| KR101233718B1 (en) | Appratus and method for scanning neighbor base station in a mobile communication system | |
| KR101267053B1 (en) | Apparatus and method for executing bi-casting in wireless network | |
| EP3917201B1 (en) | Communication device, communication method, and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190326 |