CN109788519A - A kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold - Google Patents
A kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold Download PDFInfo
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Abstract
The invention discloses a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold, for supporting the wireless dual band terminal equipment of 802.11v wireless network protocol, by the way that by wireless terminal, the frequency threshold value of cutting of WiFi is set dynamically on 2.4G connection frequency point, and the frequency threshold value of cutting of WiFi is fixedly installed on 5G connection frequency point by wireless terminal, wireless terminal can be made when WiFi needs to cut frequency, on successful switch to suitable frequency point, while guaranteeing that wireless terminal does not toggle on two frequency bins again.Guarantee that routing device or AP can have a frequency point to be supplied to wireless terminal connection, improves the user experience under double frequency WIFI is cut frequently.The switching for allowing routing device or AP to be capable of handling different terminals is more smooth, makes wireless terminal switching more smooth.Therefore, there is very high use value and promotional value.
Description
Technical field
The present invention relates to a kind of WiFi intelligent handover algorithms, specifically, being to be related to one kind based on 2.4G adaptive threshold
Double frequency WiFi intelligent handover algorithms.
Background technique
WiFi, which cuts frequency, currently on the market is received according to routing device or AP (Access Point, i.e. wireless access point)
The RSSI (received signal strength) of wireless terminal carries out cutting frequency foundation as threshold value, when signal of the wireless terminal on 2.4G is strong
It spends r (2.4) and is higher than routing device or when the cutting frequency RSSI threshold value (2.4) R of 2.4G of AP, be required to cut frequency to 5G；When wireless whole
It holds when the signal strength r (5) on 5G is lower than (5) threshold value R of routing device or the 5G of AP, is required to cut frequency to 2.4G.
But cut frequency threshold value using 2.4G and 5G in the market and be fixed a threshold value, there are a defects, when in 5G
It is very weak, it when 2.4G is very strong, is in the same localities, routing device or AP receive the RSSI value either 2.4G of wireless terminal also
It is 5G, reaches the threshold value for being required to cut frequency, at this moment no matter wireless terminal connects 2.4G or 5G, can all be required to cut frequency, lead
Cause wireless terminal can be connected without frequency point or repeatedly two frequency bins switch, cause wireless terminal can not normal use network, shadow
Ring user's online experience.
Therefore, it is necessary to optimize fixed threshold bring defect, allow equipment in same point, guarantee has a frequency point that can connect,
Rather than it is required to switch simultaneously by two frequency bins.Vehicles Collected from Market dual frequency equipment it is expected on preferential attachment 5G, so we need
The RSSI threshold value of the 2.4G of the RSSI threshold value of fixed 5G, dynamic self-adapting routing device or AP.Based on 2.4G adaptive thresholding
Value-based algorithm cooperates double frequency switching flow, is able to use family wireless terminal when WiFi needs to cut frequency, successful switch to suitable frequency
On point, while guaranteeing that wireless terminal does not toggle on two frequency bins again.
Summary of the invention
The purpose of the present invention is to provide a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold, mainly
It solves WiFi in the prior art and cuts frequency threshold value to be fixed value, when two-frequency signal intensity value reaches threshold value simultaneously, lead to wireless end
End can be connected without frequency point or repeatedly two frequency bins switch, cause wireless terminal can not normal use network, influence on user
The problem of dictyosome is tested.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold, include the following steps:
(S10) judge whether terminal is the wireless dual band terminal equipment for supporting 802.11v wireless network protocol, if so,
Enter step (S20)；Otherwise, without any processing；
(S20) frequency point two frequency bins are connected with 5G to 2.4G connection frequency point when wireless terminal is associated with or scans WiFi and send spy
Claim frame request instruction is surveyed, routing device or AP obtain the current letter that wireless terminal connects frequency point in 2.4G connection frequency point with 5G
The difference DELTA r of number intensity；
(S30) according to the positive-negative relationship of Δ r, determine that wireless terminal cuts frequency dynamic threshold R on 2.4G connection frequency point
(2.4)；
(S40) judge the WiFi frequency point of wireless terminal connection；
(S50) compare wireless terminal in the currently size of the transmission rate of connection frequency point and wireless terminal in current connection frequency
The size for cutting frequency threshold value of signal strength and the wireless terminal WiFi on currently connection frequency point of point, judge nothing according to comparison result
Whether line terminal cuts frequency；
(S60) compare routing device or AP request wireless terminal cut the maximum of frequency number and setting and cuts the relationship of frequency number,
After waiting for a period of time and carry out corresponding operating；Step (S20) is again introduced into after the completion of operation.
Further, wireless terminal in 2.4G connection frequency point connects with 5G the current letter on frequency point in the step (S20)
The calculation formula of the difference of number intensity is Δ r=r (2.4)-r (5), and r (2.4) is that routing device or AP are got wirelessly in formula
For terminal in the current RSSI value of 2.4G frequency point, r (5) is that routing device or AP get wireless terminal in the current of 5G frequency point
RSSI value.
Further, in the step (S30), if Δ r >=0, R (2.4)=Δ r+R (5)+X；If Δ r < 0,
Then R (2.4)=R (5)+X, R (5) is that wireless terminal WiFi on 5G connection frequency point cuts frequency fixed threshold in formula, and X is constant.
Further, in the step (S50), if wireless terminal on 2.4G connection frequency point, more current RSSI
Value r (2.4) and cut frequency dynamic threshold R (2.4)；If wireless terminal is on 5G connection frequency point, more current RSSI value r (5)
With cut frequency fixed threshold R (5).
Further, in the step (S50), if r (2.4) > R (2.4) and wireless terminal transmission rate is less than
100Kbps, then routing device or AP by 802.11v wireless network protocol by wireless terminal from 2.4G connection frequency handover to
It is otherwise constant on 5G connection frequency point, after waiting the T1 time, enter step (S20)；R if (5) < R (5) and wireless terminal transmission
Rate is less than 100Kbps, then routing device or AP by 802.11v wireless network protocol by wireless terminal from 5G connection frequency point
It is switched on 2.4G connection frequency point, it is otherwise constant, after waiting the T1 time, enter step (S20).
Further, in the step (S60), if routing device or AP request wireless terminal cut frequency number be greater than or
Maximum equal to configuration cuts frequency number, resets routing device or AP request wireless terminal cuts frequency number, after waiting the T3 time, enter
Step (S20)；Otherwise, routing device or AP request wireless terminal cut frequency number and add 1, after waiting the T2 time, are again introduced into step
(S20)。
Compared with prior art, the invention has the following advantages:
By the way that by wireless terminal, the frequency threshold value of cutting of WiFi is set dynamically on 2.4G connection frequency point, wireless terminal exists the present invention
The frequency threshold value of cutting of WiFi is fixedly installed on 5G connection frequency point, is able to use family wireless terminal when WiFi needs to cut frequency, successfully cuts
It changes on suitable frequency point, while guaranteeing that wireless terminal does not toggle on two frequency bins again.Guarantee that routing device or AP are equal
There can be a frequency point to be supplied to wireless terminal connection, improve the user experience under double frequency WIFI is cut frequently.It allows at routing device or AP
The switching for managing different terminals is more smooth, makes wireless terminal WiFi switching more smooth.
Detailed description of the invention
Fig. 1 is the flow diagram of inventive algorithm.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
Embodiment
As shown in Figure 1, a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold disclosed by the invention, packet
Include following steps:
(S10) judge whether terminal is the wireless dual band terminal equipment for supporting 802.11v wireless network protocol, if so,
Enter step (S20)；Otherwise, without any processing.
(S20) transmission of frequency point two frequency bins is connected when wireless terminal is associated with or scans WiFi with 5G to 2.4G connection frequency point
The request instructions such as prob probe request, routing device or AP obtain wireless terminal and connect frequency point with 5G in 2.4G connection frequency point
Current signal strength difference DELTA r.
(S30) according to the positive-negative relationship of Δ r, determine that wireless terminal WiFi on 2.4G connection frequency point cuts frequency dynamic threshold
R(2.4).If Δ r >=0, R (2.4)=Δ r+R (5)+X；If Δ r < 0, R (2.4)=R (5)+X, R (5) is in formula
Terminal cuts frequency fixed threshold on 5G connection frequency point, and X is constant.
(S40) the WiFi frequency point for judging wireless terminal connection judges that it connects frequency point as 2.4G or 5G.
(S50) if terminal is on 2.4G connection frequency point, more current RSSI value r (2.4) and frequency dynamic threshold R is cut
(2.4)；If r (2.4) > R (2.4) and wireless terminal transmission rate are less than 100Kbps, routing device or AP pass through
802.11v wireless network protocol is otherwise constant by wireless terminal on from 2.4G connection frequency handover to 5G connection frequency point, waits T1
After time, (S20) is entered step；If r (5) < R (5) and wireless terminal transmission rate are less than 100Kbps, routing device or
By wireless terminal on from 5G connection frequency handover to 2.4G connection frequency point, otherwise not person AP passes through 802.11v wireless network protocol
Become, after waiting the T1 time, enters step (S20).
(S60) compare routing device or AP request wireless terminal cut the maximum of frequency number and setting and cuts the relationship of frequency number,
If routing device or AP request wireless terminal, which cut frequency number, cuts frequency number more than or equal to the maximum of configuration, resetting routing is set
Standby or AP request wireless terminal cuts frequency number, after waiting the T3 time, enters step (S20)；Otherwise, routing device or AP request nothing
Line terminal cuts frequency number and adds 1, after waiting the T2 time, enters step (S20).
Wherein, in step (S20), it is known that if r (2.4) > R (2.4), r (5) > R (5).Because of R (2.4)
=△ R+R (5), r (2.4)=r (5)+△ r, △ R=△ r+X, so r (5)+△ r > △ R+R (5), so r (5) > R (5)+X.
If r (5) < R (5), r (2.4) < R (2.4), because of R (5)=R (2.4)-△ R, r (5)=r (2.4)-△
R, △ R=△ r+X, so r (2.4)-△ r < R (2.4)-△ R, so r (2.4)+X < R (2.4) and r (2.4) < R (2.4).
1) when receiving the connection request of r (2.4) and r (5) in 3s, △ r is updated；
2) when terminal is on 2.4G, if receiving 5G connection request, △ r is updated；
3) when terminal is on 5G, if receiving 2.4G connection request, △ r is updated；
Non- above-mentioned 3 kinds of situations, the value that △ r once updates before maintaining.
To sum up: R (2.4)=△ r+R (5)+X=20+ △ r+X, X is temporarily set as 20.
When 2.4G and 5G are existed simultaneously, it can be connected on 5G, just be connected on 5G as far as possible, because of the current environment of 2.4G
Under, larger, 5G frequency range is interfered, even weak signal, nor affects on the communication of other terminals, while 5G interference is smaller.
Wireless terminal is connected in 2.4G frequency range, as r (2.4) > R (2.4), at this moment r (5) > R (5), it is believed that 5G is more suitable for nothing
The communication of line terminal, allows wireless terminal to be switched on 5G.
Wireless terminal is connected in 5G frequency range, can be by cutting when r (5) < 20, that is, when wireless terminal signals are poor
2.4G is changed to, guarantees more communication at a distance, at this moment threshold value < R (2.4) of r (2.4), it is ensured that 2.4G can be connected, and
Same place will not be because being requested to switch on 5G when poll check next time.
Experimental data comparison is as shown in table 1 below:
Table 1
It is above-mentioned statistics indicate that, when 2.4G and 5G present threshold value is not much different, fixed threshold and dynamic threshold can be at
Function double frequency mutually switches, and when 2.4G and 5G present threshold value difference is larger, fixed threshold just shows its defect, can be in double frequency
Between be required to switch, and dynamic threshold is without there is such case.
The present invention will be by that will support the wireless dual band terminal equipment of 802.11v network protocol WiFi on 2.4G connection frequency point
Cut frequency threshold value dynamic setting, and by wireless terminal on 5G connection frequency point WiFi cut frequency threshold value be fixedly installed, nothing can be made
Line terminal is when WiFi needs to cut frequency, on successful switch to suitable frequency point, while guaranteeing wireless terminal not in two frequency bins again
On toggle.Guarantee that routing device or AP can have a frequency point to be supplied to wireless terminal connection, improves double frequency WIFI and cut frequency
Under user experience.The WiFi switching for allowing routing device or AP to handle different terminals is more smooth, makes wireless terminal switching more smooth.
Therefore, there is very high use value and promotional value.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (6)
1. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold, which comprises the steps of:
(S10) judge whether terminal is the wireless dual band terminal equipment for supporting 802.11v wireless network protocol, if so, into
Step (S20)；Otherwise, without any processing；
(S20) the transmission detection of frequency point two frequency bins is connected with 5G to 2.4G connection frequency point when wireless terminal is associated with or scans WiFi to ask
Frame is asked to instruct, routing device or AP obtain the current signal strength that wireless terminal connects frequency point in 2.4G connection frequency point with 5G
Difference DELTA r；
(S30) according to the positive-negative relationship of Δ r, determine that wireless terminal WiFi on 2.4G connection frequency point cuts frequency dynamic threshold R
(2.4)；
(S40) judge the WiFi frequency point of wireless terminal connection；
(S50) compare wireless terminal in the currently size of the transmission rate of connection frequency point and wireless terminal in currently connection frequency point
The size for cutting frequency threshold value of signal strength and the wireless terminal WiFi on currently connection frequency point, judge wireless whole according to comparison result
Whether frequency is cut in end；
(S60) compare routing device or AP request wireless terminal cuts the maximum of frequency number and setting and cuts the relationship of frequency number, wait
After a period of time and carry out corresponding operating；Step (S20) is again introduced into after the completion of operation.
2. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold according to claim 1, feature
It is, wireless terminal connects with 5G the difference of the current signal strength on frequency point in 2.4G connection frequency point in the step (S20)
Calculation formula be Δ r=r (2.4)-r (5), r (2.4) is that routing device or AP get wireless terminal in 2.4G frequency in formula
The current RSSI value of point, r (5) are that routing device or AP get wireless terminal in the current RSSI value of 5G frequency point.
3. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold according to claim 2, feature
It is, in the step (S30), if Δ r >=0, R (2.4)=Δ r+R (5)+X；If Δ r < 0, R (2.4)=R
(5)+X, R (5) is that wireless terminal cuts frequency fixed threshold on 5G connection frequency point in formula, and X is constant.
4. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold according to claim 3, feature
Be, in the step (S50), if wireless terminal on 2.4G connection frequency point, more current RSSI value r (2.4) with cut
Frequency dynamic threshold R (2.4)；If wireless terminal, on 5G connection frequency point, more current RSSI value r (5) fixes threshold with frequency is cut
Value R (5).
5. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold according to claim 4, feature
It is, in the step (S50), if r (2.4) > R (2.4) and wireless terminal transmission rate are less than 100Kbps, routing is set
Standby or AP passes through 802.11v wireless network protocol by wireless terminal on from 2.4G connection frequency handover to 5G connection frequency point, no
It is then constant, after waiting the T1 time, enter step (S20)；If r (5) < R (5) and wireless terminal transmission rate is less than
100Kbps, then routing device or AP by 802.11v wireless network protocol by wireless terminal from 5G connection frequency handover to
It is otherwise constant on 2.4G connection frequency point, after waiting the T1 time, enter step (S20).
6. a kind of double frequency WiFi intelligent handover algorithms based on 2.4G adaptive threshold according to claim 5, feature
It is, in the step (S60), if routing device or AP request wireless terminal cut frequency number and be more than or equal to configuration most
Frequency number is cut greatly, resets routing device or AP request wireless terminal cuts frequency number, after waiting the T3 time, enter step (S20)；It is no
Then, routing device or AP request wireless terminal cut frequency number and add 1, after waiting the T2 time, enter step (S20).
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| CN113316210A (en) * | 2021-05-28 | 2021-08-27 | 深圳市共进电子股份有限公司 | Network signal switching method, device, terminal and storage medium |
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