CN106488556A - The bearing calibration of framing signal skew and device - Google Patents
The bearing calibration of framing signal skew and device Download PDFInfo
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- CN106488556A CN106488556A CN201610912583.4A CN201610912583A CN106488556A CN 106488556 A CN106488556 A CN 106488556A CN 201610912583 A CN201610912583 A CN 201610912583A CN 106488556 A CN106488556 A CN 106488556A
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- 238000009432 framing Methods 0.000 title claims abstract description 64
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- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 4
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- 238000004458 analytical method Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
Abstract
The invention discloses the bearing calibration of framing signal skew and device.The method includes：Obtain mac address and the signal strength signal intensity of the WAP of auxiliary positioning；Geographical position according to the corresponding WAP of the mac address lookup；Signal covering radius according to the corresponding WAP of the intensity estimation signal；The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；When the gap in the measuring and calculating position and the geographical position of one of WAP that obtain by framing signal exceedes given threshold, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.Using the present invention, positional accuracy can be improved, with low cost.
Description
Technical field
The present invention relates to the technical field of alignment system, the bearing calibration more particularly, to framing signal skew and dress
Put.
Background technology
Alignment system, it refer to determine the position of the users such as mobile phone or mobile terminal by obtaining specific framing signal
Information (latitude and longitude coordinates), marks technology or the service of the position of user on electronic chart.Alignment system is not necessarily and passes through
GPS location, says framing signal first, and framing signal has two kinds, and one kind is satellite-based framing signal, and such as GPS is defended
Star or big-dipper satellite, another kind are the positioning of the base station based on mobile operation network.Satellite-based positioning mode is to utilize mobile phone
On d GPS locating module or Big Dipper locating module by the position signalling of oneself be sent to positioning backstage come realize mobile phone positioning.
Architecture is then to determine mobile phone location using base station to the measuring and calculating distance of the distance of mobile phone.The latter does not need mobile phone to have
GPS location ability, but precision depends greatly on the distribution of base station and the size of coverage, has the time error can be more than one
Kilometer.The former positioning precision is higher, but gps satellite signal penetration capacity is weak, therefore cannot use indoors and power consumption is high.
So, in the prior art, satellite fix no matter is adopted, or the multipoint positioning that is implemented based on mobile communications network, no
By being outdoor or indoor, all cause setting accuracy not accurate because of signal is bad, error is even greater than 500 sometimes
Rice, causes present position saltus step occur, and navigation and position are determined makes troubles.
Content of the invention
In view of the above problems, the present invention proposes bearing calibration and the device of framing signal skew, it is possible to increase positioning is accurate
Exactness, with low cost.
The bearing calibration offset there is provided a kind of framing signal in the embodiment of the present invention, including：
Obtain mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
Geographical position according to the corresponding WAP of the mac address lookup；
Signal covering radius according to the corresponding WAP of the intensity estimation signal；
The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
When the measuring and calculating position obtained by framing signal is exceeded with the gap in the geographical position of one of WAP
During given threshold, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.
Preferably, described the step of obtain the mac address of WAP and signal strength signal intensity, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
One WAP of selection signal maximum intensity, obtains mac address and the signal of a WAP
Intensity.
Preferably, described the step of obtain the mac address of WAP and signal strength signal intensity, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
Two WAPs of selection signal maximum intensity, obtain mac address and the signal of two WAPs
Intensity.
Preferably, described the step of obtain the mac address of WAP and signal strength signal intensity before, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
Selection signal intensity exceedes three WAPs of intensity threshold, obtains the mac ground of three WAPs
Location and signal strength signal intensity.
Preferably, the step of using WAP in the ssid list as the WAP of auxiliary positioning, including：
The confidence level of WAP is set；
Confidence level in the ssid list is exceeded several WAP wirelessly the connecing as auxiliary positioning of confidence threshold
Access point.
Preferably, the step of the confidence level of setting WAP, also include：
Data traffic according to WAP improves its confidence level.
Preferably, the step of the confidence level of setting WAP, also include：
Number of times according to the auxiliary positioning of WAP improves its confidence level.
Preferably, the step of the confidence level of setting WAP, also include：
The number of times for being accessed according to WAP improves its confidence level.
Preferably, when the measuring and calculating position obtained by framing signal and the difference in the geographical position of one of WAP
Away from described in the point calibration for when exceeding given threshold, close measuring and calculating position side being selected on the band of position calculate position
The step of, specifically include：
When the measuring and calculating position obtained by framing signal is exceeded with the gap in the geographical position of one of WAP
During the signal covering radius of the WAP of current estimation, select near the measuring and calculating position one on the band of position
Position is calculated described in the point calibration of side.
Preferably, the band of position is calculated using the geographical position and its signal covering radius of at least one WAP
Step, specifically includes：
As the center of circle, its corresponding signal covering radius is radius, calculates circumference in geographical position with a WAP
Region is used as the band of position；
When there is two WAPs, the circumference of each WAP, and the friendship with two circumference is calculated respectively
Battery limit (BL) domain is used as the band of position；
When there is three WAPs, the circumference of each WAP, and the friendship with three circumference is calculated respectively
Battery limit (BL) domain is used as the band of position；
When there is the WAP of more than three, the circumference of each WAP is calculated respectively, and with phase not to the utmost
The juncture area of three same circumference is used as the band of position.
Correspondingly, a kind of means for correcting of framing signal skew is embodiments provided, including：
AP acquiring unit, for obtaining mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
Mac query unit, for the geographical position according to the corresponding WAP of the mac address lookup；
Radius evaluation unit, for the signal covering radius according to the corresponding WAP of the intensity estimation signal；
Area calculation unit, calculates for the geographical position using at least one WAP and its signal covering radius
The band of position；
Position correction unit, for when the measuring and calculating position obtained by framing signal and the ground of one of WAP
When the gap of reason position exceedes given threshold, the point calibration institute near measuring and calculating position side is selected on the band of position
State measuring and calculating position.
Preferably, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
First choice unit, for a WAP of selection signal maximum intensity, obtains a wireless access
The mac address of point and signal strength signal intensity.
Preferably, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
Second select unit, for two WAPs of selection signal maximum intensity, obtains two wireless access
The mac address of point and signal strength signal intensity.
Preferably, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
3rd select unit, exceedes three WAPs of intensity threshold, obtains this three for selection signal intensity
The mac address of WAP and signal strength signal intensity.
Preferably, the auxiliary positioning unit, including：
Confidence level arranging unit, for arranging the confidence level of WAP；
Confidence level select unit, makees for confidence level in the ssid list is exceeded the several WAPs of confidence threshold
WAP for auxiliary positioning.
Preferably, also include：
First adjustment unit, for improving its confidence level according to the data traffic of WAP.
Preferably, also include：
Second adjustment unit, for improving its confidence level according to the number of times of the auxiliary positioning of WAP.
Preferably, also include：
3rd adjustment unit, improves its confidence level for the number of times for being accessed according to WAP.
Preferably, the position correction unit, including：
Distance threshold unit, for when the measuring and calculating position obtained by framing signal and the ground of one of WAP
When the gap of reason position exceedes the signal covering radius of the WAP of current estimation, select on the band of position to lean on
Position is calculated closely described in the point calibration of measuring and calculating position side.
Preferably, the area calculation unit, specifically includes：
Circumference computing unit, for the geographical position of a WAP as the center of circle, its corresponding signal covers half
Footpath is radius, calculates circumferential area as the band of position；
Boundary computing unit, for when there is two WAPs, calculating the circumference of each WAP respectively,
And using the juncture area of two circumference as the band of position；When there is three WAPs, calculating each respectively and wirelessly connecing
The circumference of access point, and using the juncture area of three circumference as the band of position；When there is the WAP of more than three, point
The circumference of each WAP do not calculated, and using the juncture area of three circumference that is not quite similar as the band of position.
With respect to the scheme that prior art, the present invention are provided, mac address and the letter of the WAP of auxiliary positioning is obtained
Number intensity.As each wireless access point AP has a globally unique MAC Address, and in general WAP
AP will not be moved within a period of time, based on this, carried out auxiliary positioning with WAP and can be improved positioning precision.Root
Geographical position according to the corresponding WAP of the mac address lookup；Wirelessly connect according to the intensity estimation signal accordingly
The signal covering radius of access point.This programme is in the case of WiFi is opened, you can scan and collect the wireless access point AP of surrounding
Signal, no matter whether the wireless access point AP encrypts, if connect, or even signal strength signal intensity is not enough, can get which
The MAC Address for broadcasting out, calculates position area using the geographical position and its signal covering radius of at least one WAP
Domain, can know the residing region of current actual position.When the measuring and calculating position obtained by framing signal is wireless with one of them
When the gap in the geographical position of access point exceedes given threshold, it can be determined that the measuring and calculating position obtained by framing signal has been gone out
Existing gross error, selects on the band of position to calculate position described in the point calibration near measuring and calculating position side, to carry
High position precision.And, by above-mentioned analysis, auxiliary positioning is carried out just with WIFI signal, even without being linked into
Arbitrary wireless access point AP, so, it is not necessary to increase hardware cost or increase any rate, you can to GPS location signal or base
Framing signal of standing is corrected, so, the data linkage of multiple location technologies is used by this programme, by position error control
Together in limited range, additional means need not be increased and positional accuracy can be improved, with low cost.
The aspect that the present invention is added and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings other attached
Figure.
The flow chart of the bearing calibration that Fig. 1 is offset for framing signal of the present invention.
The first embodiment flow chart of the bearing calibration that Fig. 2 is offset for framing signal of the present invention.
The first embodiment schematic diagram of the bearing calibration that Fig. 3 is offset for framing signal of the present invention.
The second embodiment flow chart of the bearing calibration that Fig. 4 is offset for framing signal of the present invention.
The second embodiment schematic diagram of the bearing calibration that Fig. 5 is offset for framing signal of the present invention.
The 3rd embodiment flow chart of the bearing calibration that Fig. 6 is offset for framing signal of the present invention.
The 3rd embodiment schematic diagram of the bearing calibration that Fig. 7 is offset for framing signal of the present invention.
The fourth embodiment flow chart of the bearing calibration that Fig. 8 is offset for framing signal of the present invention.
The fourth embodiment schematic diagram of the bearing calibration that Fig. 9 is offset for framing signal of the present invention.
The schematic diagram of the means for correcting that Figure 10 is offset for framing signal of the present invention.
The fourth embodiment schematic diagram of the means for correcting that Figure 11 is offset for framing signal of the present invention.
As shown in the figure：AP1 is the first WAP for being arranged at " Dacha Beer Garden " bar；AP2 is for arranging
The second WAP in " Giant Food " shopping center；AP3 is for being arranged at " KIPP DC Shaw Campus " school
3rd WAP；AP4 is the 4th wireless access for being arranged at " Kennedy Recreation Center " recreation center
Point；G1 is the measuring and calculating position by GPS location signal acquisition, positioned at " Q St NW " street and " Marion St NW " street
At crossroad；G2 is the measuring and calculating position by architecture signal acquisition, positioned at " Beau That-Shaw " dining room；S1 is logical
Cross the position of the first WAP auxiliary positioning；S2 be by the first WAP and the second WAP auxiliary positioning
Position；User's head portrait is the user current location in " Compass Coffee " cafe.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention.
In some flow processs of description in description and claims of this specification and above-mentioned accompanying drawing, contain according to
Multiple operations that particular order occurs, but it should be clearly understood that these operations can not be according to the suitable of its appearance herein
Sequence is only used for distinguishing each different operation, sequence number executing or executed in parallel, sequence number such as 101,102 of operation etc.
Any execution sequence is not represented itself.In addition, these flow processs can include more or less of operation, and these operations can
To execute in order or executed in parallel.It should be noted that " first ", " second " herein etc. description, be for distinguish not
Message together, equipment, module etc., do not represent sequencing, and it is different types also not limit " first " and " second ".
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other enforcement obtained under the premise of creative work is not made by those skilled in the art
Example, belongs to the scope of protection of the invention.
The flow chart of the bearing calibration that Fig. 1 is offset for framing signal of the present invention, including：
S101：Obtain mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
S102：Geographical position according to the corresponding WAP of the mac address lookup；
S103：Signal covering radius according to the corresponding WAP of the intensity estimation signal；
S104：The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
S105：When the measuring and calculating position obtained by framing signal and the gap in the geographical position of one of WAP
During more than given threshold, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.
With respect to the scheme that prior art, the present invention are provided, mac address and the letter of the WAP of auxiliary positioning is obtained
Number intensity.As each wireless access point AP has a globally unique MAC Address, and in general WAP
AP will not be moved within a period of time, based on this, carried out auxiliary positioning with WAP and can be improved positioning precision.Root
Geographical position according to the corresponding WAP of the mac address lookup；Wirelessly connect according to the intensity estimation signal accordingly
The signal covering radius of access point.This programme is in the case of WiFi is opened, you can scan and collect the wireless access point AP of surrounding
Signal, no matter whether the wireless access point AP encrypts, if connect, or even signal strength signal intensity is not enough, can get which
The MAC Address for broadcasting out, calculates position area using the geographical position and its signal covering radius of at least one WAP
Domain, can know the residing region of current actual position.When the measuring and calculating position obtained by framing signal is wireless with one of them
When the gap in the geographical position of access point exceedes given threshold, it can be determined that the measuring and calculating position obtained by framing signal has been gone out
Existing gross error, selects on the band of position to calculate position described in the point calibration near measuring and calculating position side, to carry
High position precision.And, by above-mentioned analysis, auxiliary positioning is carried out just with WIFI signal, even without being linked into
Arbitrary wireless access point AP, so, it is not necessary to increase hardware cost or increase any rate, you can to GPS location signal or base
Framing signal of standing is corrected, so, the data linkage of multiple location technologies is used by this programme, by position error control
Together in limited range, additional means need not be increased and positional accuracy can be improved, with low cost.
Wherein, the measuring and calculating position for being obtained by framing signal is surpassed with the gap in the geographical position of one of WAP
Depending on the given threshold that crosses can be according to the precision of framing signal, such as 20 meters, 50 meters, 100 meters, 500 meters etc..
The first embodiment flow chart of the bearing calibration that Fig. 2 is offset for framing signal of the present invention.Fig. 3 is present invention positioning letter
Number skew bearing calibration first embodiment schematic diagram.In first embodiment, of selection signal maximum intensity wirelessly connects
Access point, carries out auxiliary positioning, improves positioning precision.
S201：Obtain the ssid list of the WLAN that scanning is arrived；
S202：Using WAP in the ssid list as the WAP of auxiliary positioning；
S203：One WAP of selection signal maximum intensity, obtain a WAP mac address and
Signal strength signal intensity；
S204：Geographical position according to the corresponding WAP of the mac address lookup；
S205：Signal covering radius according to the corresponding WAP of the intensity estimation signal；
S206：The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
S207：When the measuring and calculating position obtained by framing signal and the gap in the geographical position of one of WAP
During more than given threshold, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.
First embodiment, by taking one city map of the U.S. as an example.Assume that user is in " Compass Coffee " cafe
Positioned.As shown in figure 3, user's head portrait is the user current location in " Compass Coffee " cafe.AP1 is for setting
It is placed in first WAP in " Dacha Beer Garden " bar；AP2 is for being arranged at " Giant Food " shopping center
Second WAP；AP3 is the 3rd WAP for being arranged at " KIPP DC Shaw Campus " school；G1 is to pass through
The measuring and calculating position of GPS location signal acquisition, at crossroad of " the Q St NW " street with " Marion St NW " street.
First, user obtains the ssid list of the WLAN that scanning is arrived by mobile phone or terminal device.Due to distance
More remote, wifi signal is weaker, and cafe is the signal cover in bar wifi (wireless access point AP 1), so, SSID
Include at least apart from the nearest wireless access point AP 1 of cafe in the middle of list, may can also search for distant wireless
Access point AP2 and wireless access point AP 3.It is further assumed that ssid list include AP1, AP2, AP3, but due to AP3 apart from G1 too
Far, or as AP3 not yet adds to can be used in the middle of the wireless access point list of auxiliary positioning, therefore in the middle of the present embodiment one,
Using wireless access point AP 1, AP2 in the ssid list as the WAP of auxiliary positioning.Then, selection signal intensity is most
A big wireless access point AP 1, obtains mac address and the signal strength signal intensity of a wireless access point AP 1.According to the mac
Address, can inquire about the geographical position-bar of corresponding WAP, it is also possible to look into network provider to cloud server
Ask, know while city map is obtained from network provider/cloud server, obtain on map that each can be used in the lump
The corresponding mac address of the WAP of auxiliary positioning.Estimated according to the signal strength signal intensity that user mobile phone or terminal device work as pre-test
Calculate the signal covering radius of corresponding WAP.Bar position and its signal covering radius using wireless access point AP 1
Calculate the band of position, i.e., circle ring area as shown in Figure 3 with bar as the center of circle.Finally, in the middle of the present embodiment, user uses
GPS location signal, when the geographical position by the measuring and calculating position G1 of GPS location signal acquisition and one of WAP
When the gap of AP1 exceedes given threshold, on the circle ring area, the point S1 near the measuring and calculating position G1 side is selected to correct
The measuring and calculating position G1.Obviously, S1 is the position by the first WAP auxiliary positioning, is more nearly user than G1 and works as
Front position.So, improve positioning precision.
It should be added that, user mobile phone or terminal device only need to be using bar or the WAPs in shopping center
The mac address for broadcasting out, and the signal strength signal intensity of current measuring and calculating, you can realize auxiliary positioning, arbitrary wireless even without accessing
Access point, safety approach, with low cost.
The second embodiment flow chart of the bearing calibration that Fig. 4 is offset for framing signal of the present invention.Fig. 5 is present invention positioning letter
Number skew bearing calibration second embodiment schematic diagram.In second embodiment, two of selection signal maximum intensity wirelessly connect
Access point, carries out auxiliary positioning, improves positioning precision further.
S301：Obtain the ssid list of the WLAN that scanning is arrived；
S302：Using WAP in the ssid list as the WAP of auxiliary positioning；
S303：Two WAPs of selection signal maximum intensity, obtain two WAPs mac address and
Signal strength signal intensity；
S304：Geographical position according to the corresponding WAP of the mac address lookup；
S305：Signal covering radius according to the corresponding WAP of the intensity estimation signal；
S306：The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
S307：When the measuring and calculating position obtained by framing signal and the gap in the geographical position of one of WAP
During more than given threshold, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.
Second embodiment, continues by taking the city map of first embodiment as an example.Still assume that user is in " Compass
Coffee " cafe is positioned.Fig. 5 of second embodiment include compared with Fig. 3, also S2, S2 be by the first wireless access
Point and the position of the second WAP auxiliary positioning.
First, user obtains the ssid list of the WLAN that scanning is arrived by mobile phone or terminal device.In the same manner, it is assumed that
Ssid list includes AP1, AP2, AP3.In the first embodiment, a lot of users successfully pass wireless access point AP 1 and are aided in
Positioning.In this second embodiment, the number of times according to the auxiliary positioning of wireless access point AP 1 exceedes certain number, according to setting
Exceed certain number in the number of times for being accessed of the wireless access point AP 2 in shopping center, according to the data flow of wireless access point AP 3
Amount exceedes certain number, therefore above-mentioned AP1, AP2 and AP3 are both configured to WAP with a high credibility.In the present embodiment two
Central, using wireless access point AP 1, AP2 with a high credibility in the ssid list and AP3 as auxiliary positioning wireless access
Point.
Then, two wireless access point AP 1 of selection signal maximum intensity and AP2, obtain two WAPs
Mac address and signal strength signal intensity.Geographical position according to the corresponding WAP of the mac address lookup, it is known that respectively wine
And shopping center.According to user mobile phone or terminal device when the letter of the corresponding WAP of the intensity estimation signal of pre-test
Number covering radius.Bar and shopping center position and its signal covering radius calculating position using wireless access point AP 1, AP2
Region, i.e., annulus as shown in Figure 5 with bar as the center of circle and the annulus with shopping center as the center of circle, the intersection of two annulus, i.e.,
S2 position and user's head portrait position.
Finally, when the geographical position by the measuring and calculating position G1 of GPS location signal acquisition and one of WAP
When the gap of AP1 exceedes given threshold, select near the measuring and calculating position G1 mono- on the S2 position and user's head portrait position
Position G1 is calculated described in point user's head portrait position correction of side.Obviously, user's head portrait position is in " Compass Coffee "
In cafe, the current location of user is more precisely indicated than G1 or S1.So, improve positioning precision.
It should be added that, ssid list is not scanned the whole WAPs for obtaining all in second embodiment
WAP as auxiliary positioning.Using WAP in the ssid list as the WAP of auxiliary positioning
The step of, including：The confidence level of WAP is set；Confidence level in the ssid list is exceeded confidence threshold several wireless
Access point is used as the WAP of auxiliary positioning.Preferably, can also be improved according to the data traffic of WAP wireless
The confidence level of access point；Number of times according to the auxiliary positioning of WAP improves its confidence level；Quilt according to WAP
The number of times of access improves its confidence level.
The 3rd embodiment flow chart of the bearing calibration that Fig. 6 is offset for framing signal of the present invention.Fig. 7 is present invention positioning letter
Number skew bearing calibration 3rd embodiment schematic diagram.In 3rd embodiment, selection signal intensity exceedes the three of intensity threshold
Individual WAP, carries out auxiliary positioning, improves positioning precision further.
S401：Obtain the ssid list of the WLAN that scanning is arrived；
S402：Using WAP in the ssid list as the WAP of auxiliary positioning；
S403：Selection signal intensity exceedes three WAPs of intensity threshold, obtains three WAPs
Mac address and signal strength signal intensity；
S404：Geographical position according to the corresponding WAP of the mac address lookup；
S405：Signal covering radius according to the corresponding WAP of the intensity estimation signal；
S406：The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
S407：When the measuring and calculating position obtained by framing signal and the gap in the geographical position of one of WAP
During the signal covering radius of the WAP for exceeding current estimation, select near the measuring and calculating position on the band of position
Put measuring and calculating position described in the point calibration of side.
3rd embodiment, continues by taking the city map of second embodiment as an example.Still assume that user is in " Compass
Coffee " cafe is positioned.Fig. 7 of 3rd embodiment includes AP4, AP4 for being arranged at " Kennedy compared with Fig. 5, also
4th WAP in Recreation Center " recreation center.
First, user obtains the ssid list of the WLAN that scanning is arrived by mobile phone or terminal device, it is assumed that SSID
List includes AP1, AP2, AP3 and AP4.In this third embodiment, AP1, AP2, AP3 still meet confidence level and exceed confidence threshold
The condition of value, and AP4 is the WAP that newly sets up, confidence level is relatively low.Therefore by nothing with a high credibility in the ssid list
Line access point AP1, AP2 and AP3 are used as the WAP of auxiliary positioning.
Then, selection signal intensity exceedes three WAPs of intensity threshold, obtains three WAPs
Mac address and signal strength signal intensity.Geographical position according to the corresponding WAP of the mac address lookup, it is known that respectively wine
, shopping center and school.According to user mobile phone or terminal device when the corresponding wireless access of the intensity estimation signal of pre-test
The signal covering radius of point.Covered using the bar of wireless access point AP 1, AP2, AP3, shopping center and school location and its signal
The lid radius calculation band of position, i.e., annulus as shown in Figure 7 with bar as the center of circle, the annulus with shopping center as the center of circle and with learn
School is the annulus in the center of circle, the intersection of three annulus, i.e. user's head portrait position.
The step of band of position being calculated using the geographical position of at least one WAP and its signal covering radius, tool
Body includes：As the center of circle, its corresponding signal covering radius is radius, calculates circumference area in geographical position with a WAP
Domain is used as the band of position；When there is two WAPs, the circumference of each WAP is calculated respectively, and with two circles
The juncture area in week is used as the band of position；When there is three WAPs, the circumference of each WAP is calculated respectively,
And using the juncture area of three circumference as the band of position；When there is the WAP of more than three, each is calculated respectively
The circumference of WAP, and using the juncture area of three circumference that is not quite similar as the band of position.
Finally, when the measuring and calculating position by GPS location signal acquisition and one of wireless access point AP 1 or the ground of AP2
When the gap of reason position exceedes the signal covering radius of the WAP of current estimation, select on the band of position to lean on
Position is calculated closely described in point user's head portrait position correction of measuring and calculating position side.Obviously, user's head portrait position is in
In " Compass Coffee " cafe, the current location of user is more precisely indicated than G1 or S1.So, improve
Positioning precision.And the larger S2 position of the error in second embodiment is not in the row of the alternative band of position.
It should be added that, position and one of WAP is calculated except obtained by framing signal
The gap in geographical position exceedes the signal covering radius of the WAP of current estimation to be carried out outside auxiliary positioning, it is also possible to
The measuring and calculating position obtained by framing signal is with the gap in the geographical position of one of WAP less than current estimation
The signal covering radius of the WAP carries out auxiliary positioning.As distance is more remote, wifi signal is weaker, and that estimated accordingly should
The signal covering radius error of WAP is also larger.So, covered with the signal more than the WAP of current estimation
Lid radius carries out auxiliary positioning, i.e. user current location necessarily closer to the WAP for sending wifi signal, is carried out with this
Auxiliary positioning, precision is more preferably.
The fourth embodiment flow chart of the bearing calibration that Fig. 8 is offset for framing signal of the present invention.Fig. 9 is present invention positioning letter
Number skew bearing calibration fourth embodiment schematic diagram.The WAP of more than three in fourth embodiment, is selected, is carried out
Auxiliary positioning, improves positioning precision further.
S501：Obtain the ssid list of the WLAN that scanning is arrived；
S502：The confidence level of WAP is set；
S503：Confidence level in the ssid list is exceeded the several WAPs of confidence threshold as the nothing of auxiliary positioning
Line access point；
S504：Selection signal intensity exceedes three WAPs of intensity threshold, obtains three WAPs
Mac address and signal strength signal intensity；
S505：Geographical position according to the corresponding WAP of the mac address lookup；
S506：Signal covering radius according to the corresponding WAP of the intensity estimation signal；
S507：As the center of circle, its corresponding signal covering radius is radius, calculates in geographical position with a WAP
Circumferential area is used as the band of position；When there is the WAP of more than three, the circle of each WAP is calculated respectively
Week, and using the juncture area of three circumference that is not quite similar as the band of position；
S508：When the measuring and calculating position obtained by framing signal and the gap in the geographical position of one of WAP
During the signal covering radius of the WAP for exceeding current estimation, select near the measuring and calculating position on the band of position
Put measuring and calculating position described in the point calibration of side.
Fourth embodiment, continues by taking the city map of 3rd embodiment as an example.Still assume that user is in " Compass
Coffee " cafe is positioned.Fourth embodiment also includes that G2, G2 are the measuring and calculating position by architecture signal acquisition,
It is located at " Beau That-Shaw " dining room.From unlike 3rd embodiment, in the present embodiment, user is believed using architecture
Number, bigger error is occurred in that, the measuring and calculating position of positioning is the dining room positioned at cafe southwest side.Obviously, if now using first
The auxiliary positioning scheme of embodiment, can still improve positioning precision, more press close to cafe.If now using second embodiment
Auxiliary positioning scheme, it is likely that corrected with the larger S2 position of error measuring and calculating position G2.If now implementing using the 3rd
The auxiliary positioning scheme of example, then can exclude the interference of the larger S2 position of error.The WAP of auxiliary positioning is more, row
Except the ability of interference is stronger, the precision of positioning is also higher.It is apparent that as auxiliary positioning WAP need be reliable,
Position is accurately and substantially constant, just can be used as referential.
In order to improve the reliability of the WAP as auxiliary positioning, the confidence level of WAP is set；By institute
State confidence level in ssid list and exceed the several WAPs of confidence threshold as the WAP of auxiliary positioning.The originally the 4th
In embodiment, AP1, AP2, AP3, AP4 are satisfied by the condition that confidence level exceedes confidence threshold, therefore will be whole in the ssid list
WAP is used as the WAP of auxiliary positioning.
Selection signal intensity exceedes three WAPs of intensity threshold, obtains the mac ground of three WAPs
Location and signal strength signal intensity, then querying geographical position and the corresponding signal covering radius of estimation respectively.If as shown in figure 9, the signal of AP3
Intensity is less than intensity threshold, then, in the middle of fourth embodiment, should carry out auxiliary positioning with the three of AP1, AP2, AP4 points of positions.Tool
Body ground, as the center of circle, its corresponding signal covering radius is radius to the geographical position with each WAP, calculates circumference area
Domain is used as the band of position.If the signal strength signal intensity of AP3 is higher than intensity threshold, when there is the WAP of more than three, respectively
Calculate the circumference of each WAP, and using the juncture area of three circumference that is not quite similar as the band of position.In theory,
The made circumference in 4 points of positions of AP1 to AP4, it should compared to a bit, i.e. user current location.When by architecture signal acquisition
The gap in measuring and calculating position G2 and the geographical position of one of wireless access point AP 1 exceed the WAP of current estimation
Signal covering radius when, on the band of position select near measuring and calculating position side user's head portrait position correction institute
State measuring and calculating position G2.So, improve precision.
The schematic diagram of the means for correcting that Figure 10 is offset for framing signal of the present invention, including：
AP acquiring unit, for obtaining mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
Mac query unit, for the geographical position according to the corresponding WAP of the mac address lookup；
Radius evaluation unit, for the signal covering radius according to the corresponding WAP of the intensity estimation signal；
Area calculation unit, calculates for the geographical position using at least one WAP and its signal covering radius
The band of position；
Position correction unit, for when the measuring and calculating position obtained by framing signal and the ground of one of WAP
When the gap of reason position exceedes given threshold, the point calibration institute near measuring and calculating position side is selected on the band of position
State measuring and calculating position.
Figure 10 is corresponding with Fig. 1, the method for operation of in figure each unit with identical in method.
Preferably, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
First choice unit, for a WAP of selection signal maximum intensity, obtains a wireless access
The mac address of point and signal strength signal intensity.
Preferably, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
Second select unit, for two WAPs of selection signal maximum intensity, obtains two wireless access
The mac address of point and signal strength signal intensity.
The fourth embodiment schematic diagram of the means for correcting that Figure 11 is offset for framing signal of the present invention.
As shown in figure 11, the AP acquiring unit, including：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
3rd select unit, exceedes three WAPs of intensity threshold, obtains this three for selection signal intensity
The mac address of WAP and signal strength signal intensity.
As shown in figure 11, the position correction unit, including：
Distance threshold unit, for when the measuring and calculating position obtained by framing signal and the ground of one of WAP
When the gap of reason position exceedes the signal covering radius of the WAP of current estimation, select on the band of position to lean on
Position is calculated closely described in the point calibration of measuring and calculating position side.
As shown in figure 11, the area calculation unit, specifically includes：
Circumference computing unit, for the geographical position of a WAP as the center of circle, its corresponding signal covers half
Footpath is radius, calculates circumferential area as the band of position；
Boundary computing unit, for when there is two WAPs, calculating the circumference of each WAP respectively,
And using the juncture area of two circumference as the band of position；When there is three WAPs, calculating each respectively and wirelessly connecing
The circumference of access point, and using the juncture area of three circumference as the band of position；When there is the WAP of more than three, point
The circumference of each WAP do not calculated, and using the juncture area of three circumference that is not quite similar as the band of position.
Preferably, the auxiliary positioning unit, including：
Confidence level arranging unit, for arranging the confidence level of WAP；
Confidence level select unit, makees for confidence level in the ssid list is exceeded the several WAPs of confidence threshold
WAP for auxiliary positioning.
Preferably, also include：
First adjustment unit, for improving its confidence level according to the data traffic of WAP.
Preferably, also include：
Second adjustment unit, for improving its confidence level according to the number of times of the auxiliary positioning of WAP.
Figure 11 is corresponding with Fig. 8, the method for operation of in figure each unit with identical in method.
Preferably, also include：
3rd adjustment unit, improves its confidence level for the number of times for being accessed according to WAP.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
Device and the specific work process of unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
The restriction that therefore can not be interpreted as to the scope of the claims of the present invention.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of bearing calibration of framing signal skew, it is characterised in that include：
Obtain mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
Geographical position according to the corresponding WAP of the mac address lookup；
Signal covering radius according to the corresponding WAP of the intensity estimation signal；
The band of position is calculated using the geographical position and its signal covering radius of at least one WAP；
Set when the measuring and calculating position obtained by framing signal is exceeded with the gap in the geographical position of one of WAP
During threshold value, select on the band of position to calculate position described in the point calibration near measuring and calculating position side.
2. the bearing calibration of framing signal skew according to claim 1, it is characterised in that the acquisition WAP
Mac address and the step of signal strength signal intensity, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
One WAP of selection signal maximum intensity, obtains mac address and the signal strength signal intensity of a WAP.
3. the bearing calibration of framing signal skew according to claim 1, it is characterised in that the acquisition WAP
Mac address and the step of signal strength signal intensity, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
Two WAPs of selection signal maximum intensity, obtain mac address and the signal strength signal intensity of two WAPs.
4. the bearing calibration of framing signal skew according to claim 1, it is characterised in that the acquisition WAP
Mac address and the step of signal strength signal intensity before, including：
Obtain the ssid list of the WLAN that scanning is arrived；
Using WAP in the ssid list as the WAP of auxiliary positioning；
Selection signal intensity exceed intensity threshold three WAPs, obtain three WAPs mac address and
Signal strength signal intensity.
5. the bearing calibration of the framing signal skew according to any one of claim 1-4, it is characterised in that by the SSID
In list WAP as auxiliary positioning WAP the step of, including：
The confidence level of WAP is set；
Confidence level in the ssid list is exceeded the several WAPs of confidence threshold as the WAP of auxiliary positioning.
6. the means for correcting that a kind of framing signal offsets, it is characterised in that include：
AP acquiring unit, for obtaining mac address and the signal strength signal intensity of the WAP of auxiliary positioning；
Mac query unit, for the geographical position according to the corresponding WAP of the mac address lookup；
Radius evaluation unit, for the signal covering radius according to the corresponding WAP of the intensity estimation signal；
Area calculation unit, calculates position for the geographical position using at least one WAP and its signal covering radius
Region；
Position correction unit, for when the measuring and calculating position obtained by framing signal and the geographical position of one of WAP
When the gap that puts exceedes given threshold, select on the band of position to survey described in the point calibration near measuring and calculating position side
Calculate position.
7. the means for correcting that framing signal according to claim 6 offsets, it is characterised in that the AP acquiring unit, bag
Include：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
First choice unit, for a WAP of selection signal maximum intensity, obtains a WAP
Mac address and signal strength signal intensity.
8. the means for correcting that framing signal according to claim 6 offsets, it is characterised in that the AP acquiring unit, bag
Include：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
Second select unit, for two WAPs of selection signal maximum intensity, obtains two WAPs
Mac address and signal strength signal intensity.
9. the means for correcting that framing signal according to claim 6 offsets, it is characterised in that the AP acquiring unit, bag
Include：
SSID scanning element, for obtaining the ssid list of the WLAN that scanning is arrived；
Auxiliary positioning unit, for using WAP in the ssid list as the WAP of auxiliary positioning；
3rd select unit, exceedes three WAPs of intensity threshold for selection signal intensity, obtains this three wirelessly
The mac address of access point and signal strength signal intensity.
10. the means for correcting that the framing signal according to any one of claim 6-9 offsets, it is characterised in that the auxiliary
Positioning unit, including：
Confidence level arranging unit, for arranging the confidence level of WAP；
Confidence level select unit, for confidence level in the ssid list to be exceeded the several WAPs of confidence threshold as auxiliary
Help the WAP of positioning.
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