CN103517407B - Real-time location method and location-server - Google Patents
Real-time location method and location-server Download PDFInfo
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- CN103517407B CN103517407B CN201210218756.4A CN201210218756A CN103517407B CN 103517407 B CN103517407 B CN 103517407B CN 201210218756 A CN201210218756 A CN 201210218756A CN 103517407 B CN103517407 B CN 103517407B
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Abstract
The invention discloses a kind of real-time location method and location-server, described localization method includes: obtain signal intensity and the directional information of the first signal that access points sends, wherein, the signal intensity of described first signal and directional information are that terminal to be positioned sends the framing signal to access points；The calibration information of location-server is searched, if there is direction and the signal intensity of identical with the direction of described first signal and signal intensity or immediate secondary signal；Then obtaining the positional information being associated with the direction of secondary signal, signal intensity, wherein, the direction of described first signal and the direction of secondary signal are that terminal to be positioned sends or direction during reception signal；Send described positional information to recipient, complete the location of pre-determined bit terminal.By the way, it is possible to increase the accuracy of location.
Description
Technical field
The present invention relates to field of locating technology, particularly relate to a kind of real-time location method and location clothes
Business device.
Background technology
Universal, indoor real-time positioning system (real time location along with WLAN
System, RTLS) catch in recent years.Its application prospect is quite varied, relates to
Industry-by-industry.As: can be applicable to, at hospital inner position medical worker or equipment, can be applicable to
The product of warehouse positioning storage, applies also at building inner position valuables.
The various location technologies utilizing WLAN are used for indoor positioning, according to location side
The difference of method, when existing major technique has the time of advent (time of arrival, TOA), arrival
Between poor (time difference of arrival, TDOA) and based on receive signal intensity (received
Signal strength, RSS) location technology.Inventor through studying for a long period of time discovery, above three
Plant location technology and all there is different technologies defect, described below:
TOA location technology needs the propagation time measuring transmitting node to target, according to known
In the propagation time that signal velocity and measurement are arrived, calculate distance, obtain the position of target.Tool
Body implementation is as follows:
In order to navigate to the position of target, TOA localization method needs to obtain at least 3 transmitting nodes
Range-to-go, in the case of known signal spread speed, measures certain transmitting node and arrives
Time required for target, the distance arriving target from this transmitting node can be calculated.Such as Fig. 1 institute
Show, three its distances arriving separately at target of transmitting node P1, P2 and P3 be D1, D2 and
D3.Calculating at least three distance afterwards, determine the most intuitively the method for target location be ask with
Launch point is the center of circle, the intersection point of three circles with distance as radius.As it can be seen, intersection point is T,
I.e. this intersection point T is exactly the position of target.Except this geometric algorithm, also have other based on TOA
Algorithm determine the position of target, such as: CN(closest-neighbor) and residual weighted (residual
Weighting, RWGH) etc..
For TOA localization method, its defect existed is: time synchronized requires height, i.e. needs
All of transmitting and receiving node keep precise time to synchronize.Accordingly, it would be desirable to higher power consumption and
Hardware configuration.In the environment of indoor, there is multipath effect in wireless propagation, be difficult to find from
Transmitting node is to the aiming line of target, and therefore, positioning precision can decrease.
For TDOA location technology, then mainly sent signal by two transmitting nodes simultaneously, logical
Cross measure two signals arrive targets time difference carry out computed range.Specific implementation is as follows:
TDOA arrives the time being positioned target by the radio signal measuring different transmitting node
Difference, positions target.According to known spread speed, directly time difference be converted into away from
Deviation.As in figure 2 it is shown, transmitting node P1 and P2 is P to the range difference of target T1,2Time, mesh
The position of mark T can be with P1, P2 as focus and bifocal range difference is constant P1,2Hyperbolic
On line.Transmitting node P1 and P3 is P to the range difference of target T2,3Time, the position meeting of target T
With with P2, P3 as focus and bifocal range difference is for constant P2,3Hyperbola on.By two
Group or many group hyperbolies intersect, it is estimated that the position of target, as in figure 2 it is shown, due to away from
Deviation should be on the occasion of, should fall at the interval curve of X positive axis so organizing hyp intersection point more
On, intersection point T meets the requirements, and therefore, T is target location.
For TDOA location technology, its defect existed is: though TDOA location technology unlike
TOA location technology needs the clock that all nodes carry out the overall situation to synchronize like that, but remains a need for sending out
Penetrating node and carry out clock synchronization, equally, the requirement to hardware and power consumption is high, and cost is big.Signal
Multipath transmisstion and shadow effect make precision raising be restricted.
The principle of location technology based on RSS is then to utilize signal to there will be in communication process
The rule of decay, according to theoretical and experience signal attenuation model loss is converted into away from
From.As: as shown in Figure 3, it is known that the signal intensity that transmitting node P1, P2 and P3 launch, survey
Measure the signal intensity at target T, calculate transmitting node and target according to the pad value of signal
Distance, so that it is determined that go out to be positioned the position of target.In indoor environment, due to multipath transmisstion and
Barrier, signal intensity often changes along with environment, causes positioning precision to reduce.
Summary of the invention
The embodiment of the present invention provides a kind of real-time location method and positioner, it is possible to utilize based on connecing
The location technology of the signal intensity received positions, and reduces environment pair during real-time positioning simultaneously
The impact of received signal strength, improves positioning precision.
On the one hand a kind of real-time location method is provided, including: obtain the first of access points transmission
The signal intensity of signal and directional information, wherein, the signal intensity of the first signal with directional information is
Terminal to be positioned sends the framing signal to access points；Calibration information is searched and the first letter
Number direction is identical or the direction of immediate secondary signal, calibration information includes measuring in advance many
Prescription is to, incidence relation data between signal intensity and position, wherein, the side of the first signal
To with the direction of secondary signal be terminal to be positioned send or receive signal time direction；If searching
The direction of identical with the direction of the first signal or immediate secondary signal is there is in calibration information,
In calibration information, then choose the signal intensity searching the directional correlation with secondary signal obtained；If
Choose that obtain and secondary signal directional correlation signal intensity and the signal intensity of the first signal
Identical or closest, then obtain the positional information being associated with the direction of secondary signal, signal intensity；
Send positional information to recipient, complete the location of pre-determined bit terminal.
Another aspect provides a kind of real-time positioning apparatus, including: the first acquisition module, it is used for obtaining
Take signal intensity and the directional information of the first signal that access points sends, wherein, the first signal
Signal intensity and directional information be that terminal to be positioned sends the framing signal to access points；Look into
Look for module, identical with the direction of the first signal or immediate second for searching in calibration information
The direction of signal, calibration information include many prescriptions of measuring in advance to, signal intensity and position it
Between incidence relation data, wherein, the direction of the first signal and the direction of secondary signal are for being intended to position
Terminal sends or receives direction during signal；Choose module, for obtaining school in lookup module searches
When calibration information exists the direction of identical with the direction of the first signal or immediate secondary signal,
Calibration information is chosen the signal intensity searching the directional correlation with secondary signal obtained；Second obtains
Delivery block, for choosing that obtain and secondary signal directional correlation signal intensity choosing module
Identical with the signal intensity of the first signal or closest to time, obtain with the direction of secondary signal, signal
The positional information that intensity is associated；Sending module, for sending positional information to recipient, completes
The location of pre-determined bit terminal.
Being different from the situation of prior art, the embodiment of the present invention is for based on the signal intensity received
When location technology positions, feature the most affected by environment, before real-time positioning, first will bag
Include many prescriptions of measuring in advance to, the calibration of incidence relation data between signal intensity and position
Information is stored in location-server.When real-time positioning, location-server obtains access points
The signal intensity of the first signal sent and directional information, wherein, the signal intensity of the first signal with
Directional information sends for terminal to be positioned.Then by the signal intensity of the first signal and directional information with
Calibration information carries out fingerprint comparison, if there is the directional information with the first signal and letter in calibration information
Number intensity is identical or the directional information of immediate secondary signal and signal intensity, then obtain and second
The positional information that the direction of signal, signal intensity are associated, the positional information of acquisition is end to be positioned
The position coordinates of end, and this positional information is sent to recipient, complete the location of terminal to be positioned.
Wherein, the direction of the first signal and the direction of secondary signal send for terminal to be positioned or receive signal
Time direction.By the way, it is possible to utilize location technology based on the signal intensity received to enter
Row location, reduces the environment impact on received signal strength during real-time positioning simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art location technology a kind of time of advent；
Fig. 2 is the schematic diagram of prior art difference a kind of time of advent location technology；
Fig. 3 is the schematic diagram of prior art a kind of received signal strength location technology；
Fig. 4 is the schematic network structure of real-time positioning system one embodiment of the present invention；
Fig. 5 is the system block diagram of alignment system shown in Fig. 4；
Fig. 6 is the schematic flow sheet of real-time location method one embodiment of the present invention；
Fig. 7 is the structural representation of real-time positioning apparatus one embodiment of the present invention.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Owing to TOA and TDOA location technology is high to clock synchronization requirement, be therefore not suitable for indoor
Low cost, the location of low-power consumption.The embodiment of the present invention uses the scheme measuring signal intensity, i.e. RSS
Location technology position, simultaneously to RSS location technology easily by environmental change and indoor multipath
The impact of effect, this defect is improved, and reduces environmental effect, eliminates the signal intensity received
The measurement error of instruction (received signal strength indication, RSSI), improves location
Accuracy.
As shown in Figure 4, Fig. 4 is the network structure signal of real-time positioning system one embodiment of the present invention
Figure, in the present embodiment, real-time positioning system includes: location-server 41, access points
(access point, AP) 42, terminal to be positioned 43 and switch 44.
Wherein, real-time positioning system also includes: locating and displaying terminal 45.
Wherein, the quantity of access points 42 is three or more than three；Terminal 43 to be positioned is
It is configured with the mobile terminal of gyroscope；Available ethernet concentrator replaces switch 44.
Wherein, gyroscope is again angular-rate sensor, and the physical quantity of measurement is deflection, when i.e. tilting
Rotational angular velocity.
The operating process of real-time positioning system is, first location-server 41 and access points 42
Forming LAN by switch 44 or ethernet concentrator, terminal to be positioned 43 is at local
Location-server 41 is accessed by access points 42 in the range of net.Location-server 41 is according to visit
Ask what the terminal to be positioned 43 that access point 42 gathers sent signal strength information, to end to be positioned
End 43 positions, and sends positional information to location-server 45, inquires about for user.
In the present embodiment, IEEE 802.11 is the standard that WLAN is the most authoritative, the present embodiment
Following the WLAN (wireless local area networks, WLAN) of 802.11 agreements
In, make use of indoor existing wlan device to position.The connection of each several part in system
Mode is, multiple access points 42 pass through wired by switch 44 with location-server 41
Mode be connected, terminal 43 to be positioned accesses network by access points 42 wirelessly,
Locating and displaying terminal 45 is connected with location-server 41 in a wired or wireless manner.
The function of alignment system each several part is, location-server 41 is used for storing calibration information, with
And operation location algorithm draws the positional information of the equipment of being positioned.Locating and displaying terminal 45 is PC
Or other can access the portable equipment of WLAN, it is used for accessing location-server 41, looks into
See the result of location.Terminal 43 to be positioned is to need the equipment of location in alignment system, can
To be label (tag), portable machine or the WIFI mobile phone etc. of customization.Alignment system can position people or
The position of person's article, people only need to carry mobile terminal etc., and article only need to lay tag etc., so that it may
To be positioned by alignment system.
The embodiment of the present invention is fingerprint location based on RSS, surveys and two rank of real-time positioning including field
Section.Specifically location mode is as it is shown in figure 5, Fig. 5 is the system block diagram of alignment system shown in Fig. 4,
As it can be seen, location-server 41 includes: alignment unit 411, data base 412, engine of positioning
413 and data process with filter unit 414.
The position fixing process of alignment system shown in Fig. 5 is, the survey stage on the scene, carries out field and surveys the survey of acquisition field
Acquisition field survey data, such as RSSI information etc., be recorded in file by data, then by file
Field is surveyed data and is stored in the data base 412 of location-server 41, and wherein, file can be can
Extension language file (Extensible Markup Language, XML), location-server 41
In alignment unit 411 to field survey data calibrate, it is thus achieved that the RSSI information (RSSI after calibration
Probabilistic model), now fingerprint base is established.
In the real-time positioning stage, location-server 41 obtains RSSI in real time by WLAN
Information, and the data obtained in real time are processed by data process with filter unit 414 and filter
Ripple, engine of positioning 413 is carried out processing with the RSSI information in fingerprint base with filtered data
Comparison, calculates the position of terminal 43 to be positioned, and positional information recorded data base 412
In.
User in locating and displaying terminal 45 by webpage submit to the request of inquiring position or other
After event, location-server 41 response request, inquire about data base 412, and Query Result is returned
In locating and displaying terminal 45, check for user.
Wherein, in the real-time positioning stage, when location-server 41 passes through WLAN in real time
After obtaining RSSI information, alignment unit 411 is transferred field from data base 412 and is surveyed data and carry out
Calibration, sets up fingerprint base, and after then calibrating, information sends to engine of positioning 413, engine of positioning
After 413 estimate positional information, positional information is stored in data base 412.
Can also be in the real-time positioning stage, when location-server 41 is real-time by WLAN
After ground obtains RSSI information, the information in the fingerprint base that alignment unit 411 will build sends
To engine of positioning 413, after engine of positioning 413 estimates positional information, position coordinates is stored in number
According to storehouse 412.
Concrete localization method, refers to Fig. 6.Fig. 6 is real-time location method one of the present invention enforcement
The schematic flow sheet of example, the real-time location method of the present embodiment comprises the following steps:
Step 601, obtains signal intensity and the directional information of the first signal that access points sends,
Wherein, the signal intensity of the first signal sends to access points for terminal to be positioned with directional information
Framing signal；
In the real-time positioning stage, the signal strength information of access points collection terminal to be positioned,
In the present embodiment, using the mode of up location, idiographic flow is as follows:
Terminal to be positioned timing sends the request of detecting (probe request)；
Terminal to be positioned sends acting as of probe request, according to 802.11 agreements, utilizes
Probe request frame scans 802.11 networks in region.
Wherein, the transmission cycle of probe request depends on terminal to be positioned.In terminal to be positioned
Being provided with gyroscope, gyroscope can measure the directional information of terminal to be positioned, terminal to be positioned
The directional information measured is sent to location-server.
B. detect, with the terminal to be positioned AP in same LAN, the probe request received
Signal intensity；
The signal intensity detected and corresponding AP are indicated that transmission is to positioning clothes by C.AP
Business device.
Wherein, the position of terminal to be positioned to be determined, need the AP of three or more than three to fixed
Position server sends its signal intensity detected.
Step 602, searches identical with the direction of the first signal or immediate the in calibration information
The direction of binary signal, calibration information includes that many prescriptions of measuring in advance are to, signal intensity and position
Between incidence relation data, wherein, the direction of the first signal and the direction of secondary signal are fixed for being intended to
Position terminal sends or receives direction during signal；
Wherein, the acquisition process of calibration information is as follows:
A. select the multiple measurement points in the region needing to position and utilize terminal to carry out field survey, obtaining
Obtaining field and survey data, field is surveyed data and is included that the position coordinates of measurement point, terminal receive the letter of the second information
Number intensity and the directional information of secondary signal；
B. the field of acquisition is surveyed data to be stored in the data base of location-server；
C. the field being stored in data base is surveyed data to calibrate, to obtain calibration information.
As it has been described above, the concrete acquisition mode that data are surveyed in field is:
In the present embodiment, the mode producing the descending calibration of employing of calibration information, its flow process is:
A.AP sends beacon (beacon)；
According to the regulation of 802.11 agreements, AP can periodicity institute in its LAN region, place
Terminal is had to send beacon frame.
B. in the region needing location, the i.e. region that AP is covered, select specifically to measure a little,
And record the position in this place, i.e. location coordinate information；
Particular measurement point is randomly choosing of user, for obtaining preferable measurement effect, particular measurement
Point distribution should ratio more uniform.
C. measure, specific, the downstream signal beacon that point utilizes terminal to be positioned detection AP to send
The signal intensity of frame, and the directional information of the downstream signal that AP sends is measured by gyroscope；
Wherein, at a certain particular measurement point, terminal to be positioned can be surveyed on certain specific direction
Amount is repeatedly, it is thus achieved that one group of signal intensity and directional information.
Wherein, at a certain particular measurement point, terminal to be positioned self direction rotatable, it is thus achieved that many
Group signal intensity and directional information.To realize the measurement in each AP multiple directions.
Terminal to be positioned will measure the location coordinate information of point, the signal intensity of measurement and direction
Information stores to XML file；
XML file includes multiple location coordinate information measured under point, the signal intensity of measurement and
The signal intensity of the multiple directions under directional information, and same measurement point and directional information.
E. XML file is imported in the data base of location-server.
Step 603, if search obtain calibration information exists identical with the direction of the first signal or
The direction of close secondary signal, then choose in calibration information search obtain with secondary signal
The signal intensity of directional correlation；
Have recorded in calibration phase fingerprint base for the calibration RSSI in each AP multiple directions
Information, as shown in table 1, measures n AP RSSI information under n angle, calibration
RSSI information set Rii(i ∈ Z, i > 0) represents, direction set A={ β1,β2,β3... βn}。
In the real-time positioning stage, location-server can obtain directional information from terminal to be positioned, and from finger
The calibration RSSI information chosen in stricture of vagina storehouse on suitable direction contrasts, and calculates the position of terminal
Put coordinate.
The calibration RSSI information on which direction of choosing is divided into two kinds of situations, and a kind of situation is at table 1
Shown direction set A searches the direction identical with terminal to be positioned, such as the terminal 1 in table 2
Orientation angle be α, set A in find β1Value equal with α, then when comparing,
Choose β1Calibration RSSI information under angle is compared.
Table 1
Note: AP represents the access points sending signal；β represents angle；R represents to access and accesses
The signal intensity received on some different directions.
Another kind of situation is to search for less than the direction identical with terminal to be positioned in direction set A,
If the orientation angle of the terminal 2 in table 2 is γ, find γ ∈ (β2,β3), now, then need to choose
Closest to the calibration RSSI information on γ direction, i.e. choose so that d=| γ-βi| the β that value is minimumiDirection
Calibration RSSI information under angle.
| Terminal | Angle |
| Terminal 1 | α |
| Terminal 2 | γ |
Table 2
Note: α Yu γ represents in real-time positioning respectively, the directional information that terminal to be positioned sends.
Step 604, if choosing that obtain and secondary signal directional correlation signal intensity and first
The signal intensity of signal is identical or closest, then obtain the direction with secondary signal, signal intensity phase
The positional information of association；
When carrying out contrast locating pair, if matching identical calibration RSSI value, it is believed that corresponding
The position of calibration RSSI value is exactly a position candidate.If matching multiple position candidate, continue
Screen, estimate immediate position candidate, as final position.
Step 605, sends positional information to recipient, completes the location of pre-determined bit terminal.
Wherein, the present invention also can use the mode of descending location to position in the real-time positioning stage.
Specifically, the beacon frame detection signal intensity RSSI that terminal to be positioned is sent by surrounding AP,
Meanwhile, directional information measured by the gyroscope in terminal to be positioned, and such as regulation north is positive direction,
The direction measuring terminal to be positioned is 30 degree.RSSI information required for terminal to be positioned acquisition
After directional information, deliver the information to location-server by WLAN.
After location-server receives RSSI information and directional information, filter out and be not belonging to alignment system
The RSSI information of AP, after then filtering in the RSSI information of Real-time Collection and fingerprint base
The calibration information of some all directions is compared, and is calculated the position coordinates of terminal.
In sum, the present invention provides a kind of real-time location method based on gyroscope.Based on RSS
On the basis of location technology, gyroscope is used to provide the directional information of auxiliary, with multi-direction data acquisition
Collection positions terminal to be positioned.Specifically, the survey stage on the scene, terminal to be positioned is revolved at same position
Turn repeatedly angle, collect the RSSI information of the beacon that multiple AP sends for each angle,
Meanwhile, gyroscope is also used to measure the direction that terminal to be positioned rotates every time.After measurement terminates,
Directional information and RSSI information be recorded in XML file in the lump.At positioning stage, location clothes
The directional information that the RSSI information of terminal to be positioned collected in real time by business device and gyroscope is measured,
After the information of Real-time Collection is processed and filters, with the school that detects in the multiple directions of storage
Quasi-RSSI information compares, and calculates the location coordinate information of terminal to be positioned.
By above-mentioned elaboration, the present invention, compared with existing RSS location technology, in place of it is progressive is:
Existing RSS location technology is easily subject to the impact of environmental change and multipath effect, such as: the switch of door
With walking about of people.In order to overcome disadvantages mentioned above, the present invention uses gyroscope auxiliary in alignment system
Help and measure directional information, utilize the RSSI information in all directions measured to come more accurately
Orient terminal location.As: in the survey stage on the scene, use multidirectional repetitive measurement to reduce environment
Factor affects, and measures RSSI information the most accurately；In the real-time positioning stage, add and be intended to determine
The directional information of position terminal, can carry out the comparison of RSSI information more accurately, more smart to calculate
True position.
Wherein, the real-time location method of the present invention applies also in wireless sensor network, carries out
Indoor or outdoor location.Its alignment system includes that the infrastructure portion fixed is with moveable
Terminal part, is called anchor node and blind node.Anchor node is typically saved by ZigBee or gateway
Point is connected on location-server, forms a big network.
When utilizing wireless sensor network to position, it is possible to use measure signal intensity, and auxiliary square
Position to information.As: during survey on the scene, for the measurement of signal intensity, for same
Anchor node takes multiple measurements in different directions, and records directional information by coiling property.
Fig. 7 is the structural representation of real-time positioning apparatus one embodiment of the present invention, as it can be seen, real
Time positioner include: the first acquisition module 71, search module 72, choose module 73, second
Acquisition module 74, sending module 75, receiver module 76, memory module 77 and calibration module
78。
Wherein, the first acquisition module 71, search module 72, choose module 73, second and obtain mould
Block 74 and sending module 75 broadly fall into the location-server 41 shown in Fig. 5.Search module 72 He
Choose the work that module 73 carried out identical with the work that engine of positioning 413 shown in Fig. 5 is done.
Function and the workflow of above-mentioned each module are as follows:
First acquisition module 71 is for obtaining the signal intensity of the first signal that access points sends
With directional information, wherein, the signal intensity of the first signal and directional information send for terminal to be positioned
Framing signal to access points；Specifically for receiving the mark from least three access points
Will and detected the signal strength information of the upward signal obtained, and obtain and to be determined from described
The directional information of position terminal, described upward signal is the desire that at least three access points receives respectively
The upward signal of location terminal；Or connect at least three access detected by reception terminal to be positioned
The signal strength information of the downstream signal of access point and corresponding directional information.
Search module 72 for searching identical with the direction of the first signal in calibration information or connecing most
The direction of near secondary signal, calibration information include many prescriptions of measuring in advance to, signal intensity with
And the incidence relation data between position, wherein, the direction of the first signal and the direction of secondary signal
Send or receive direction during signal for terminal to be positioned；
Choose module 73 to obtain calibration information existing and the first letter for searching in lookup module 72
Number direction is identical or during the direction of immediate secondary signal, choose and search in calibration information
That arrive and secondary signal directional correlation signal intensity；
Second acquisition module 74 is for choosing that obtain with secondary signal direction choosing module 73
The signal intensity of signal intensity and first signal of association identical or closest to time, obtain and believe with second
Number direction, the positional information that is associated of signal intensity；
Sending module 75, for sending positional information to recipient, completes the location of pre-determined bit terminal；
Wherein, sending module 75 sends positional information to recipient and includes, position is believed by sending module 75
Breath is first sent to the data base 412 shown in Fig. 5, then data base 412 determining further according to user
Positional information is returned in the locating and displaying terminal 45 shown in Fig. 5 by position request.
Receiver module 76 surveys data for the field obtaining self terminal, and described field is surveyed data and included institute
State and measure the position coordinates of point, terminal receives the signal intensity of the second information and the direction of secondary signal
Information, and needed the multiple measurement points in the region of location by selection and utilize terminal to carry out field survey
And obtain；Wherein, survey data in field include what each measurement point terminal detected in a plurality of directions
The signal intensity of downstream signal, respective direction and measurement point positional information.
Memory module 77 is stored in data base for the field of acquisition is surveyed data；Specifically for inciting somebody to action
The field obtained is surveyed data and be recorded in file, then the field survey data in file are stored in positioning service
In the data base of device, wherein, file can be extensible language file.
Calibration module 78 is calibrated for the field being stored in data base is surveyed data, to obtain
Calibration information.
The workflow of above-mentioned each module is, during real-time positioning, and the first acquisition module 71
First obtain signal intensity and the directional information of the first signal that access points sends, then pass through
Lookup module 72 obtains identical with directional information with the signal intensity of the first signal with choosing module 73
Or the signal intensity of immediate secondary signal and directional information, after obtaining the above results, second
The positional information that acquisition module 74 obtains the direction with secondary signal, signal intensity is associated, and
This positional information is sent to recipient by sending module 75, completes the location of pre-determined bit terminal.
Wherein, the signal intensity of secondary signal, directional information belong to location-server with positional information
In calibration information, its acquisition pattern is, first receiver module 76 select need location region
In multiple measurement point and utilize terminal to carry out field survey, it is thus achieved that field survey data, then memory module 77
The field of acquisition is surveyed data be stored in the data base of location-server, and utilize calibration module 78
The field being stored in data base is surveyed data calibrate, thus obtain calibration information.
Being different from the situation of prior art, the embodiment of the present invention is for based on the signal intensity received
When location technology positions, feature the most affected by environment, before real-time positioning, first will bag
Include many prescriptions of measuring in advance to, the calibration of incidence relation data between signal intensity and position
Information is stored in location-server.When real-time positioning, location-server obtains access points
The signal intensity of the first signal sent and directional information, wherein, the signal intensity of the first signal with
Directional information sends for terminal to be positioned.Then by the signal intensity of the first signal and directional information with
Calibration information carries out fingerprint comparison, if there is the directional information with the first signal and letter in calibration information
Number intensity is identical or the directional information of immediate secondary signal and signal intensity, then obtain and second
The positional information that the direction of signal, signal intensity are associated, the positional information of acquisition is end to be positioned
The position coordinates of end, and this positional information is sent to recipient, complete the location of terminal to be positioned.
Wherein, the direction of the first signal and the direction of secondary signal send for terminal to be positioned or receive signal
Time direction.By the way, it is possible to utilize location technology based on the signal intensity received to enter
Row location, reduces the environment impact on received signal strength during real-time positioning simultaneously.
By the description of embodiment of above, those skilled in the art is it can be understood that arrive this
Invention can add the mode of required general hardware platform by software and realize, naturally it is also possible to pass through
Hardware, but a lot of in the case of the former is more preferably embodiment.Based on such understanding, the present invention
The part that the most in other words prior art contributed of technical scheme can be with software product
Form embody, this software product is stored in a storage medium, such as: floppy disk, hard disk,
Flash memory or read-only memory etc., including some instructions, with so that a station terminal equipment performs the present invention
The method that each embodiment is illustrated.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention,
Every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion, or
Directly or indirectly being used in other relevant technical fields, the patent being the most in like manner included in the present invention is protected
In the range of protecting.
Claims (12)
1. a real-time location method, it is characterised in that including:
The signal intensity of the first signal that acquisition access points sends and directional information, wherein,
The signal intensity of described first signal sends to accessing access for terminal to be positioned with directional information
The framing signal of point；
Calibration information is searched identical with the direction of described first signal or immediate second
The direction of signal, described calibration information include many prescriptions of measuring in advance to, signal intensity and
Incidence relation data between position, wherein, the direction of described first signal and secondary signal
Direction is direction when terminal to be positioned transmission or reception signal；
Obtain described calibration information existing identical with the direction of the first signal or connecing most if searching
The direction of near secondary signal, then choose in described calibration information search obtain with second letter
Number the signal intensity of directional correlation；
If choosing that obtain and secondary signal directional correlation signal intensity and the first signal
Signal intensity is identical or closest, then obtain the direction with described secondary signal, signal intensity phase
The positional information of association；
Described positional information is sent to recipient.
Method the most according to claim 1, it is characterised in that:
The obtaining step of described calibration information includes:
Obtain come self terminal field survey data, described field survey data include measure point position coordinates,
Terminal receives signal intensity and the directional information of secondary signal of secondary signal, and is needed by selection
Multiple measurements in region to be positioned are put and utilize terminal to carry out field survey and obtain；
The field of acquisition is surveyed data be stored in data base；
The field being stored in data base is surveyed data calibrate, to obtain calibration information.
Method the most according to claim 2, it is characterised in that:
The described field by acquisition is surveyed the step that data are stored in data base and is specifically referred to: will obtain
Field survey data recorded in file, then by described file field survey data be stored in data base
In, wherein, described file can be extensible language file.
Method the most according to claim 2, it is characterised in that:
Described field is surveyed data and is included that each measurement point terminal detects down in a plurality of directions
The signal intensity of row signal, respective direction and measurement point positional information.
Method the most according to claim 1, it is characterised in that:
The signal intensity of the first signal that described acquisition access points sends and directional information
Step specifically refers to: receives the mark and being detected from least three access points and obtains
The signal strength information of upward signal, and obtain the direction from described terminal to be positioned and believe
Breath, described upward signal is the upper of the terminal to be positioned that receives respectively of at least three access points
Row signal.
Method the most according to claim 1, it is characterised in that:
The signal intensity of the first signal that described acquisition access points sends and directional information
Step specifically refers to: receive the descending of at least three access points detected by terminal to be positioned
The signal strength information of signal and corresponding directional information.
7. a location-server, it is characterised in that including:
First acquisition module, for obtaining the signal intensity of the first signal that access points sends
With directional information, wherein, the signal intensity of described first signal and directional information are end to be positioned
End sends the framing signal to access points；
Search module, in calibration information search identical with the direction of described first signal or
The direction of immediate secondary signal, described calibration information include many prescriptions of measuring in advance to,
Incidence relation data between signal intensity and position, wherein, the direction of described first signal
It is direction when terminal to be positioned transmission or reception signal with the direction of secondary signal；
Choose module, for described lookup module searches obtain in described calibration information exist with
The direction of the first signal is identical or during the direction of immediate secondary signal, at described calibration information
In choose and search the signal intensity of the directional correlation with secondary signal obtained；
Second acquisition module, for choosing that obtain with secondary signal side in described module of choosing
Signal intensity to signal intensity and first signal of association identical or closest to time, acquisition and institute
State the direction of secondary signal, positional information that signal intensity is associated；
Sending module, for sending described positional information to recipient, completes terminal to be positioned
Location.
Location-server the most according to claim 7, it is characterised in that described location takes
Business device includes:
Receiver module, surveys data for obtaining the field of self terminal, and described field is surveyed data and included surveying
The position coordinates of amount point, terminal receive the signal intensity of secondary signal and the direction letter of secondary signal
Breath, and needed the multiple measurement points in the region of location by selection and utilize terminal to carry out field survey
And obtain；
Memory module, is stored in data base for the field of acquisition is surveyed data；
Calibration module, calibrates for the field being stored in data base is surveyed data, to obtain
Calibration information.
Location-server the most according to claim 8, it is characterised in that:
Described memory module recorded in file specifically for the field of acquisition is surveyed data, then by institute
Stating the survey data of the field in file to be stored in data base, wherein, described file can be expansible
Language file.
Location-server the most according to claim 8, it is characterised in that:
Described field is surveyed data and is included that each measurement point terminal detects down in a plurality of directions
The signal intensity of row signal, respective direction and measurement point positional information.
11. location-servers according to claim 7, it is characterised in that:
Described first acquisition module is specifically for receiving the mark from least three access points
Will and detected the signal strength information of the upward signal obtained, and obtain from described desire
The directional information of location terminal, described upward signal is that at least three access points receives respectively
The upward signal of terminal to be positioned.
12. location-servers according to claim 7, it is characterised in that:
Described first acquisition module is specifically for receiving at least three detected by terminal to be positioned
The signal strength information of the downstream signal of access points and corresponding directional information.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218756.4A CN103517407B (en) | 2012-06-28 | Real-time location method and location-server | |
| PCT/CN2013/072646 WO2014000469A1 (en) | 2012-06-28 | 2013-03-14 | Real time location method and location server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218756.4A CN103517407B (en) | 2012-06-28 | Real-time location method and location-server |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103517407A CN103517407A (en) | 2014-01-15 |
| CN103517407B true CN103517407B (en) | 2016-11-30 |
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| CN101084696A (en) * | 2004-10-27 | 2007-12-05 | 高通股份有限公司 | Determining a mobile station position based on pertinent location fingerprint data |
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