CN108271245A - A kind of direct projection diameter judgment method and device - Google Patents
A kind of direct projection diameter judgment method and device Download PDFInfo
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- CN108271245A CN108271245A CN201611240124.2A CN201611240124A CN108271245A CN 108271245 A CN108271245 A CN 108271245A CN 201611240124 A CN201611240124 A CN 201611240124A CN 108271245 A CN108271245 A CN 108271245A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S2205/01—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications
- G01S2205/02—Indoor
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mobile Radio Communication Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The disclosure is directed to a kind of direct projection diameter judgment methods and device, method to include：Wireless device obtains the wireless signal that terminal device is sent at least two moment, and each wireless signal is made of at least one transmitting signal, and each transmitting signal at least one transmitting signal is reached by a paths；Each wireless signal is handled, and obtains the incoming wave angle of all transmitting signals in each wireless signal；The coordinate points of each transmitting signal of wireless signal each at least two wireless signal are divided at least one track, and calculate probability of each track for the track of direct projection diameter, according to the incoming wave angle of the determine the probability direct projection diameter.This method can correctly find direct projection diameter by way of carrying out dividing track to AOA, and determine each to emit in the direct projection diameter incoming wave angle of signal.
Description
Technical field
This application involves wireless location technology field more particularly to a kind of direct projection diameter judgment method and devices.
Background technology
User or operator can rely on alignment system to complete various differentiated services, such as：Indoor navigation, advertisement push away
It send, ambient services are found and personnel's traffic monitoring.
WLAN alignment systems can determine the angle of arrival (English of wireless signal：Angle of arrival, AOA).Root
According to the multiple AOA (being measured by one or more wlan devices) for the same equipment to be identified that wlan device measures, can obtain
To the position of the equipment to be identified.The wireless signal that equipment to be identified is sent may reach wlan device via mulitpath,
The signal that wlan device receives is the superposition for the wireless signal that the wlan device is successively reached via mulitpath.Via straight
It is different to penetrate the AOA of wireless signal that diameter or non-direct projection diameter reach wlan device.Since the AOA of the wireless signal of direct projection diameter is to wait to know
The correct angle of other equipment, therefore the wlan device of AOA is measured it needs to be determined that equipment to be identified (such as terminal device) is set with WLAN
Path between standby (such as access point).
The technology of indoor positioning is mainly based upon received signal strength (English at present：received signal
Strength indicator, RSSI) determine the path of equipment to be identified.When the RSSI of the wireless signal of equipment to be identified is big
When, it is that the probability of direct projection diameter is big between the equipment to be identified and wlan device.When the RSSI of the wireless signal of equipment to be identified is small
When, it is that the probability of non-direct projection diameter (for example, reflection diameter) is big between the equipment to be identified and wlan device.Wherein, the direct projection diameter
Refer to that no object blocks sight between equipment to be identified and wlan device, non-direct projection diameter refers between equipment to be identified and wlan device
There is object to block sight.As shown in Fig. 2, AP1 to the direction of visual lines of terminal due to being blocked by building, so its obtain RSSI
Small (such as RSSI=-70 decibel milliwatts (dBm)).AP2 does not block the direction of visual lines of terminal, therefore big (such as the RSSI of RSSI
=-50dBm).
But the result based on rssi measurement be vulnerable to environment influence, and then cause RSSI measure there are larger mistakes
Difference, such as device location to be identified move tens centimetres, and the variation of RSSI may be up to 10dBm.Signal strength is also with waiting to know
Other distance between equipment and wlan device is related.Even if without direct projection diameter between equipment to be identified and wlan device, but equipment to be identified
Distance between wlan device is near, and the RSSI of measurement greatly, therefore cannot accurately may judge end based on rssi measurement result
The wireless signal that end is sent is direct projection diameter or non-direct projection diameter.
Invention content
This application provides a kind of direct projection diameter judgment method and device, with find from terminal device transmitting signal
Direct projection diameter.
In order to solve the above-mentioned technical problem, this application discloses following technical solutions：
In a first aspect, the embodiment of the present application provides a kind of direct projection diameter judgment method, applied to wlan device, such as access
Point, the method includes：The wireless signal that terminal device is sent at least two moment is obtained, each wireless signal is by least one
A to emit signal composition, at least one each transmitting signal emitted in signal is wirelessly set by the way that paths arrival is described
It is standby；
The wireless device handles each wireless signal, obtains all hairs in each wireless signal
Penetrate the incoming wave angle of signal；
The wireless device is by the coordinate of each transmitting signal of wireless signal each at least two wireless signal
Point is divided at least one track, and calculates probability of each track for the track of direct projection diameter, wherein, the coordinate points are
Point of the time of each incoming wave angle and the corresponding transmitting signal of the incoming wave angle in angle-time coordinate system；
The wireless device is according to the incoming wave angle of the determine the probability direct projection diameter.
The method that present aspect provides, since when terminal device occurs mobile, the AOA angle changes of non-direct projection diameter are much larger than
The angle change of direct projection diameter AOA for example, when terminal device movement leads to the AOA angle change α of direct projection diameter, reflects the AOA of diameter
Angle at least changes 2 α.Just easily form track since AOA changes over time smaller point, this method by AOA into
The mode that row divides track can correctly find direct projection diameter, and determine each to emit in the direct projection diameter incoming wave angle of signal.
With reference to first aspect, in first aspect the first realization, the wireless device is by least two wireless communication
The coordinate points of each transmitting signal of each wireless signal are divided at least one track in number, including：The wireless device meter
It calculates at least two moment, at least one angle for emitting the corresponding incoming wave angle of signal at two neighboring moment
Difference；The coordinate points are divided at least one track by the wireless device according to the differential seat angle.
The first is realized with reference to first aspect, and in second of realization of first aspect, the wireless device is according to the angle
The coordinate points are divided at least one track by degree difference.Including：If the differential seat angle is less than or equal to predetermined angle, by institute
The coordinate points for stating two corresponding to differential seat angle incoming wave angles are divided into a track；If the differential seat angle is more than described default
The coordinate points of two incoming wave angles corresponding to the differential seat angle are then divided into two tracks by angle.
The first is realized with reference to first aspect, and during in first aspect, the third is realized, the wireless device calculates adjacent two
At least one differential seat angle for emitting the corresponding incoming wave angle of signal at a moment, including：The wireless device is according to selected
Each incoming wave angle of each wireless signal before moment and the selected moment predict the selected moment it is next when
The incoming wave angle at least one transmitting signal carved；The wireless device calculates coming at least one transmitting signal of the prediction
The angle of wave angle degree and the incoming wave angle of at least one transmitting letter of the subsequent time terminal device transmitting at the practical selected moment
Degree is poor.
With reference to first aspect or first aspect the first to any one realization in the third, in the 4th kind of first aspect
In realization, the wireless device according to the incoming wave angle of the determine the probability direct projection diameter, including：If at least one track
In a track be more than predetermined probabilities for the probability of direct projection diameter, it is determined that the incoming wave angle of the corresponding transmitting signal in the track
It is the incoming wave angle of direct projection diameter.
Second aspect, the embodiment of the present application provide a kind of direct projection diameter judgment means, which includes performing first
The unit of the middle method and step of aspect and each realization method of first aspect.
The third aspect, the embodiment of the present application provide a kind of wireless device, and the wireless device includes：Transceiver and processing
Device, wherein, the transceiver, for obtaining the wireless signal that terminal device is sent at least two moment, each wireless signal
It is made of at least one transmitting signal, each transmitting signal at least one transmitting signal reaches institute by a paths
State wireless device；
The processor for handling each wireless signal, obtains the institute in each wireless signal
There is the incoming wave angle of transmitting signal, by the coordinate of each transmitting signal of wireless signal each at least two wireless signal
Point is divided at least one track, and calculates probability of each track for the track of direct projection diameter, according to the determine the probability
The incoming wave angle of direct projection diameter, wherein, the coordinate points are each incoming wave angle and the corresponding transmitting signal of the incoming wave angle
Point of the time in angle-time coordinate system.
The wireless device further includes memory, and the memory is used to store necessary program instruction and data.
Fourth aspect also provides a kind of computer storage media, wherein, which can have program stored therein,
The program may include that the application provides the part or all of step in a kind of each realization method of direct projection diameter judgment method when performing.
Description of the drawings
In order to illustrate more clearly of the technical solution in the embodiment of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, for those of ordinary skills, do not making the creative labor
Under the premise of property, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is a kind of schematic diagram of indoor positioning technologies principle provided by the embodiments of the present application；
Fig. 2 is a kind of schematic diagram of AP sighting distances state provided by the embodiments of the present application；
Fig. 3 has the schematic diagram of direct projection diameter between a kind of AP provided by the embodiments of the present application and terminal device；
Fig. 4 does not have the schematic diagram of direct projection diameter between a kind of AP provided by the embodiments of the present application and terminal device
Fig. 5 is a kind of schematic diagram of AP sighting distances state dynamic decision provided by the embodiments of the present application；
Fig. 6 is the schematic diagram of AP1 incoming wave angles variation track provided by the embodiments of the present application；
Fig. 7 is the schematic diagram of AP2 incoming wave angles variation track provided by the embodiments of the present application；
Fig. 8 is a kind of flow diagram of direct projection diameter judgment method provided by the embodiments of the present application；
Fig. 9 is a kind of principle schematic based on cluster judgement provided by the embodiments of the present application；
Figure 10 is a kind of structure diagram of direct projection diameter judgment means provided by the embodiments of the present application；
Figure 11 is a kind of structure diagram of wireless device provided by the embodiments of the present application；
Figure 12 is a kind of structure diagram of terminal device provided by the embodiments of the present application.
Specific embodiment
Below by drawings and examples, the technical solution of the embodiment of the present application is described in further detail.
The method that each embodiment of the application provides is applied to wlan network, and specifically, this method can be adapted for drilling for a long time
Into (English：Long Term Evolution, LTE) the wireless access skill such as system or use CDMA, Orthogonal Frequency Division Multiple Access
The wireless communication system of art.Further, it is also possible to suitable for using the subsequent evolution system of LTE system, such as the 5th generation (5G) system
Or (English of newly eating dishes without rice or wine：New radio, NR) system etc..
The system comprises at least one wireless devices and at least one terminal device.The terminal device is used in difference
Moment sends at least one transmitting signal to wireless device, so that wireless device carries out terminal device according to these transmitting signals
Positioning.
Terminal device can be mobile terminal, such as mobile phone (or for " honeycomb " phone) and the meter with mobile terminal
Calculation machine, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they with it is wireless
Access net exchanges language and/or data.For example, personal communication service (English：Personal communication service,
PCS) phone, wireless phone, Session initiation Protocol (English：Session initiation protocol, SIP) it is phone, wireless
Local loop (English：Wireless local loop, WLL) it stands, personal digital assistant (English：personal digital
Assistant, PDA) etc. equipment.Terminal device may be subscriber unit (English：Subscriber unit, SU), subscriber station
(English：Subscriber station, SS), movement station (English：Mobile station, MS), distant station (English：
Remote station, RS), remote equipment (English：Remote terminal, RT), access terminal (English：access
Terminal, AT), user terminal (English：User terminal, UT), user agent (English：User agent, UA), use
Family equipment or user equipment (English：User equipment, UE).
The wireless device can be access point (English：Access point, AP), it can also be other network equipments,
Such as base station, enhanced base station or the relaying with scheduling feature or the equipment with base station functions etc..Wherein, base station can be with
It is the evolved base station (English in LTE system：Evolved Node B, eNB), base station that can also be in other systems, this Shen
Please embodiment do not limit.
In WLAN alignment systems, AOA angles can correctly reflect the geometrical relationship between terminal device and wireless device.
AOA represents that the wireless signal of terminal device reaches the incoming wave angle of wireless device.Since direct projection diameter has accurate angle information,
So the AOA of wireless signal that wireless device can be transmitted by measuring direct projection diameter determines the position of terminal device.
Below using equipment to be identified as terminal device, wireless device is described for being AP.
As shown in figure 3, having stable direction of visual lines between AP and terminal device, i.e. there are direct projections between AP and terminal device
Diameter, and as shown in figure 4, due to there is shelter between AP and terminal device, cause direct projection diameter is not present between AP and terminal device.
Wireless signal reaches AP by the shelter of surrounding by reflection or scattering, and the path of these reflections or scattering is non-direct projection diameter.
Terminal device can have different sight states in different positions, as shown in figure 5, terminal device is from first
It puts A1 and is moved to second position A2.For AP1, have always between first position and the terminal device and AP1 of the second position
There is direct projection diameter, it is possible to a clearly AOA angle changes track be gone out by clustering planning, as shown in fig. 6, filled circles in figure
Point represents the AOA angles of terminal device obtained in different moments, and rectangular origin represents clutter, by the track for tracking dot
May determine that has direct projection diameter always between AP1 and terminal device.
For AP2, terminal device is in first position A1, due to being blocked blocking for object, the transmitting letter of terminal device
Number mainly by scattering, the modes such as penetrate and reach AP2, into without direct projection diameter.When terminal device is moved to the second position
A track can be cooked up during A2, as shown in fig. 7, can determine the position of all the points in track by tracking dot track
Between AP2 all there is direct projection diameter, and the arrival bearing of each direct projection diameter can be determined according to the AOA of ordinate.
Fig. 8 is a kind of flow diagram of direct projection diameter judgment method provided by the embodiments of the present application, as shown in figure 8, the party
Method includes the following steps：
Step 101：AP obtains the wireless signal that terminal device is sent at least two moment, and each wireless signal is by least
One transmitting signal composition, at least one each transmitting signal emitted in signal reach the access by a paths
Point.
For example, AP obtains the wireless signal that terminal device is sent respectively at kth moment and+1 moment of kth, wherein, Mei Gewu
The superposed signal for the M transmitting signal that AP is reached by M paths that line signal is sent for terminal device.
Step 102：AP handles each wireless signal, obtains all transmittings in each wireless signal
The incoming wave angle of signal.
After AP receives wireless signal, by carrying out frequency conversion, amplification and digital-to-analogue conversion etc. to each wireless signal
Reason, obtains a series of base band datas, these base band datas then are carried out Digital Signal Processing by processor again or are passed through
LAN interface is transferred to server and is handled, and then obtain all transmitting signals in each wireless signal carrys out wave angle
Degree, further, the incoming wave angle include the incoming wave angle of direct projection diameter and the incoming wave angle of non-direct projection diameter.
Step 103：AP is by the coordinate points of each transmitting signal of wireless signal each at least two wireless signal
At least one track is divided into, and calculates probability of each track for the track of direct projection diameter, wherein, the coordinate points are every
Point of the time of a incoming wave angle and the corresponding transmitting signal of the incoming wave angle in angle-time coordinate system.
Step 104：AP is according to the incoming wave angle of the determine the probability direct projection diameter.
It specifically includes：If a track at least one track is more than predetermined probabilities for the probability of direct projection diameter,
The incoming wave angle for then determining the corresponding transmitting signal in the track is the incoming wave angle of direct projection diameter.If the probability of all tracks is equal
Then it is not direct projection diameter between the position of the terminal device corresponding to all transmitting signals and AP less than or equal to predetermined probabilities.
At this point, AP can obtain the incoming wave angle of the different transmitting signals at next moment again, and repartition track.
Further, in above-mentioned steps 103, AP is each by wireless signal each at least two wireless signal
The coordinate points of transmitting signal are divided at least one track, including：It calculates at least two moment, the two neighboring moment
The differential seat angle of the corresponding incoming wave angle of at least one transmitting signal, and be divided into the coordinate points according to the differential seat angle
At least one track.
Specifically, if the differential seat angle is less than or equal to predetermined angle, by two incoming waves corresponding to the differential seat angle
The coordinate points of angle are divided into a track；It is if the differential seat angle is more than the predetermined angle, differential seat angle institute is right
The coordinate points of two incoming wave angles answered are divided into two different tracks.
Optionally, AP can also according at least one incoming wave angle of the subsequent time at selected moment and it is described selected when
The differential seat angle of all incoming wave angles before quarter and the selected moment divides at least one track.With specific reference to incoming wave angle
Dividing mode the application of at least one track is not limited, but the incoming wave angle in each track divided is required to come
From it is different at the time of or different terminal device positions.
Optionally, the adjacent moment includes the subsequent time at selected moment and the selected moment, and AP calculates adjacent two
At least one differential seat angle for emitting the corresponding incoming wave angle of signal at a moment includes：Obtain the practical selected moment
The incoming wave angle corresponding at least one transmitting signal that terminal device described in subsequent time is sent；According to selected moment and described
Each incoming wave angle of each wireless signal before the selected moment predicts at least the one of next moment at the selected moment
The incoming wave angle of a transmitting signal；The incoming wave angle of at least one transmitting signal of the prediction is calculated actually to obtain with described
The differential seat angle of the incoming wave angle of at least one transmitting signal of terminal device transmitting.
For example, setting the selected moment as the kth moment, the subsequent time for selecting the moment is+1 moment of kth, and AP calculates the kth moment
Include the following steps with the differential seat angle at+1 moment of kth：AP obtains terminal device to be believed at least one transmitting of+1 moment of kth reality
Number incoming wave angle；Then, the incoming wave angle of each transmitting signal obtained before kth moment and kth moment according to AP is pre-
Survey the incoming wave angle that+1 moment of kth may be direct projection diameter；Finally ,+1 moment of the kth AP practical incoming wave angle obtained is calculated respectively
With prediction may be direct projection diameter incoming wave angle between differential seat angle.It can be improved by the incoming wave angle for predicting subsequent time
The success rate that track is direct projection diameter track is divided, so as to improve the accuracy of judgement.
Method provided in this embodiment, since when terminal device occurs mobile, the AOA angle changes of non-direct projection diameter are long-range
In the angle change of direct projection diameter AOA, for example, when terminal device movement leads to the AOA angle change α of direct projection diameter, diameter is reflected
AOA angles at least change 2 α.Track is just easily formed since AOA changes over time smaller point, this method passes through to every
The mode that a point emitted in the corresponding angle-time coordinate system of signal divide track can correctly find direct projection diameter,
And determine each to emit in the direct projection diameter incoming wave angle of signal.
In addition, this method for the mode of birdsing of the same feather flock together judges direct projection diameter, avoids acquiring a large amount of messages in a short time, institute
To reduce the complexity that judgement calculates, reduce the expense of interface-free resources.
Specifically, the mode birdsed of the same feather flock together judges whether it is that direct projection diameter specifically includes：AP can collect multiple sample datas,
As shown in figure 9, the data of each sample are represented with a point in coordinate diagram.Each sample be AP receive from a road
The wireless signal of diameter.The horizontal axis of coordinate diagram represents the time t of each sample of reception, and the longitudinal axis represents the AOA of the sample.Terminal device is sent out
Multiple wireless signals are sent, each wireless signal reaches AP via multiple paths, and is received by AP.Since the movement of terminal device has
Continuity, the angle change in each path also have continuity, therefore AP clusters the point in coordinate diagram.After cluster, AP is passed
Multiple paths of defeated wireless signal.The cluster of the point of each shape in coordinate diagram represents a path, such as P1, P2, P3, P4
And P5.Each path in coordinate diagram may be direct projection diameter or non-direct projection diameter.Wherein, non-direct projection diameter include reflection diameter, scattering diameter or
Reflect diameter etc..AP (can be equivalent to the big of each circle in coordinate diagram figure according to the disperse degree at the cluster midpoint in each path
It is small), identify direct projection diameter.However, when terminal device quickly moves, even if there are direct projection diameter between terminal device and AP, due to this
The disperse degree at the cluster midpoint of direct projection diameter is also big, so as to need a large amount of messages of (such as 1s) acquisition in a short time, to improve
The accuracy of judgement.
And the direct projection diameter judgment method that the application provides does not need to obtain a large amount of message in a short time, by means of terminal
The movement locus of equipment has the characteristics that successional, realizes the judgement of the AOA of the judgement to direct projection diameter and direct projection diameter, so as to
It is low that computation complexity can be greatly reduced, save empty overhead.
In a specific embodiment, which includes the following steps：
AP obtains at least one wireless signal that terminal device is sent at kth moment and+1 moment of kth, wherein, Mei Gewu
Line signal is made of at least one transmitting signal, and each signal that emits reaches AP by a paths.AP parsings obtain at least
One wireless signal obtains at least one transmitting signal, for example, AP is obtained by processing, at the kth moment by M paths
M transmitting signal, in N number of transmitting signal by N paths at+1 moment of kth.
AP utilizes channel state information (English：Channel State Information, CSI) or parsing base band
Data estimate the incoming wave angle of these transmitting signals.For example, AP calculates all acquisitions according to the data model pre-established
Emit the incoming wave angle of signal.
The incoming wave angle of at least one transmitting signal of AP prediction subsequent time terminal device transmittings.If the kth moment is works as
Preceding moment ,+1 moment of kth are subsequent time, and AP initializes the line of sight direction of AP, which includes level angle and pitching
Angle, predicting the incoming wave angle of at least one transmitting signal at+1 moment of kth can be realized by state equation, during with reference to kth
The incoming wave angle of all transmitting signals before quarter and kth moment is predicted.
Definition predicts that the state equation of incoming wave angle is：xk+1=f (x), wherein, xk+1Represent terminal device in kth+1
The sighting distance state between the transmitting signal of transmitting and AP is carved, vector x represents the state set before kth moment and kth moment.
Wherein, the incoming wave angle of at least one transmitting signal of+1 moment of kth predictionState equation can be passed through
It represents：The incoming wave angle situation that the state equation can be obtained according to practical AP
It determines, the present embodiment not limits this.
The incoming wave angle of all possible transmitting signal at+1 moment of kth of prediction is formed AOA prediction sets by AP, by AP
AOA actual angle set is formed in the incoming wave angle of+1 moment of the kth practical at least one transmitting signal obtained, is then calculated again
The differential seat angle between different incoming wave angles in the two set.
In this example, it is assumed that at the kth moment, AP obtains 3 transmitting signals and obtains 3 by 3 different paths
Incoming wave angle, and it is 0 °, 30 ° and -30 ° respectively to obtain this 3 incoming wave angles, this 3 incoming wave angles are pre- as+1 moment of kth
3 incoming wave angles surveyed, and form AOA prediction sets { 0 °, 30 °, -30 ° }.At+1 moment of kth, AP acquisitions physical layer information is estimated
The practical incoming wave angle of at least one transmitting signal sent of terminal device is counted out, if being an actually-received 3 by 3 paths
Incoming wave angle is 10 °, -60 ° and 20 ° respectively, and forms AOA actual angles set { 10 °, -60 °, 20 ° }.
AP is after a series of incoming wave angle of transmitting signals of acquisition, to these transmitting signals in angle-time coordinate
Point in system divides at least one track.A kind of dividing mode is：Track, tool are divided according to the differential seat angle of the incoming wave angle of calculating
Body includes：According to+1 moment of kth AOA prediction sets { 0 °, 30 °, -30 ° } and AOA actual angles set { 10 °, -60 °, 20 ° }.
The differential seat angle of the incoming wave angle and the incoming wave angle in AOA actual angle set in the two set in prediction sets is calculated, and
Two incoming wave angles of angle absolute value of the difference within a preset range are divided into a track.
For example, the collection that AP calculates the differential seat angle composition at+1 moment of kth is combined intoIf predetermined angle is
10 °, then two incoming wave angles of the angle absolute value of the difference less than or equal to 10 ° are divided into a track, i.e., it will be in prediction sets
0 ° with 10 ° in AOA actual angle set to be divided into a track, such as be set as first angle track, by prediction sets
In 30 ° with 20 ° in AOA actual angle set to be divided into a track, such as be set as second angle track, by remaining
- 30 ° in prediction sets and -60 ° in AOA actual angle set are respectively as third angle track and fourth angle track.
The probability of track each divided is calculated, and finds direct projection diameter and the corresponding incoming wave angle of direct projection diameter.
It is a kind of calculate probability method be：It is calculated by the probabilistic model of definition, if the probabilistic model isWherein, piRepresent the probability corresponding to i-th of track,Represent the practical incoming wave angle of i-th of track,
Represent the prediction incoming wave angle of i-th of track.
The probability of this 4 angle tracks is calculated according to above-mentioned probabilistic model is respectively：85%, 8%, 5% and 2%, it is corresponding
In first angle track, second angle track, third angle track and fourth angle track, and the sum of probability of all tracks is
1。
Judge in the probability of all tracks whether there are one probability to be more than predetermined probabilities, if predetermined probabilities are 80%, then compare
In more above-mentioned 4 probability, if there is the probability more than 80%, it was found that first angle track is more than predetermined probabilities, then really
It is direct projection diameter to determine between position and the AP where corresponding two angles in first angle track, i.e., with good sighting condition,
Two incoming wave angles, the 0 ° and 10 ° incoming wave angle for the direct projection diameter corresponding to the first angle track, the incoming wave in remaining path
It is non-direct projection diameter between angle and AP, i.e., without good sighting condition.
Method provided in this embodiment, since when terminal device occurs mobile, the AOA angle changes of non-direct projection diameter are long-range
In the angle change of direct projection diameter AOA, for example, when terminal device movement leads to the AOA angle change α of direct projection diameter, diameter is reflected
AOA angles at least change 2 α.Track is just easily formed since AOA changes over time smaller point, this method passes through division
The mode of the coordinate locus of points can correctly find direct projection diameter, and determine each to emit in the direct projection diameter incoming wave angle of signal,
It is not limited by environmental disturbances and equipment precision.In addition, it also is able to that AP is avoided to acquire in a short time largely using this method
Message data, save empty overhead.
It should be noted that only calculating the probability of each track in the present embodiment by modeling formula, it can also be passed through
Its mode calculates the probability of track, such as linear programming, sequential analysis etc., the method for specifically obtaining the probability of each track, sheet
Application is not intended to limit this.
Referring to Figure 10, the structure diagram of a kind of direct projection diameter judgment means provided for embodiment.Described device can be used
In performing the direct projection diameter judgment method in 8 related embodiment of earlier figures.
As shown in Figure 10, described device can include：Receiving unit 1001 and processing unit 1002, except receiving unit 1001
Outside processing unit 1002, can including transmitting element etc. other unit modules.
In the present embodiment, receiving unit 1001, for obtaining the wireless communication that terminal device is sent at least two moment
Number, each wireless signal is made of at least one transmitting signal, and each transmitting signal is reached by a paths to be connect
Receive unit.
Processing unit 1002 for handling each wireless signal, is obtained in each wireless signal
The incoming wave angle of all transmitting signals；It is additionally operable to that the wireless signal is divided at least one rail according to the incoming wave angle
Mark, and probability of each track for the track of direct projection diameter is calculated, and according to the incoming wave angle of the determine the probability direct projection diameter.
Optionally, processing unit 1002 are additionally operable to according to each institute obtained before selected moment and the selected moment
State at least one transmitting that terminal device described in the incoming wave angle of wireless signal and the subsequent time at the selected moment is sent
The incoming wave angle of signal, by least one incoming wave angle of the subsequent time and the selected moment and the selected moment it
Preceding incoming wave angle is divided at least one track.
Optionally, processing unit 1002 a, if track being additionally operable at least one track is direct projection diameter
Probability be more than predetermined probabilities, it is determined that the incoming wave angle of the corresponding transmitting signal in the track is the incoming wave angle of direct projection diameter.
Optionally, processing unit 1002, be additionally operable to according at least one incoming wave angle of the subsequent time at selected moment and
The differential seat angle of all incoming wave angles before the selected moment and the selected moment divides at least one track.
Optionally, processing unit 1002 are additionally operable to calculate the differential seat angle of any two incoming wave angle of different moments acquisition,
It is one by two angular divisions corresponding to the differential seat angle if the angle absolute value of the difference is less than or equal to predetermined angle
A track and, at least one differential seat angle for being less than or equal to predetermined angle described in all satisfactions is counted, and according to the statistics
At least one differential seat angle divides at least one track.
The function of each functional unit of the device can be realized by each step of above method embodiment, therefore, this
The specific work process for the direct projection diameter judgment means that embodiment provides, does not repeat again herein.
In the embodiment of a particular hardware, a kind of wireless device is additionally provided, the direct projection diameter for performing aforementioned is sentenced
The Overall Steps of disconnected method.Wherein, which has the repertoire of the direct projection diameter judgment means in previous embodiment, into
One step, which is used at least one wireless signal sent to the terminal device of acquisition, and is sought according to wireless signal
Look for the incoming wave angle of direct projection diameter and direct projection diameter.
As shown in figure 11, which includes：Transceiver 1101, processor 1102, memory 1103 and power supply 1104,
Wherein, transceiver 1101 includes the components such as at least one communication interface and antenna, and the antenna is for receiving signal, the letter
Number include the wireless signal of terminal device transmit via mulitpath transmission, antenna can include aerial array.Transceiver
1101 are used to implement the transmission-receiving function of the wireless signal between terminal device, and at least one interface is used to wireless device being connected to
Wireless network.
Processor 1102 is used to control transceiver 1101 and analyze and process, and seek the wireless signal received
Look for direct projection diameter and the corresponding incoming wave angle of direct projection diameter.Further, modem, the modulation can be included in processor 1102
Demodulator is used for wireless signal of the modulation /demodulation from terminal device, such as meets the signal of 802.11 standards.
Processor 1102 can be central processing unit (English：Central processing unit, CPU) or CPU
With the combination of hardware chip.Above-mentioned hardware chip can be application-specific integrated circuit (English：application-specific
Integrated circuit, ASIC), programmable logic device (English：Programmable logic device, PLD) or
A combination thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (English：complex programmable logic
Device, CPLD), field programmable gate array (English：Field-programmable gate array, FPGA), lead to
With array logic (English：Generic array logic, GAL) or its arbitrary combination.
Memory 1103 is used to store the data of various applications, operating system and parsing, and memory 1103 can will store
Data be transferred to processor 1102.Memory can be read-only memory (English：Read-only memory, ROM) or can
Store static information and the other kinds of static storage device of instruction, random access memory (English：random access
Memory, RAM) or can store information and instruction other kinds of dynamic memory or electric erazable programmable
Read-only memory (English：Electrically Erasable Programmable Read-Only Memory, EEPROM),
CD-ROM (English：Compact Disc Read-Only Memory, CD-ROM) or other optical disc storages, optical disc storage (packet
Include compression optical disc, laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storages set
It is standby or can be used in carrying or store simultaneously can be by computer with instruction or the desired program code of data structure form
Any other medium of access, but not limited to this.
Memory 1103 can be individually present, and can also be integrated with processor.Wherein, the memory is used for
Storage performs the application code of application scheme, and is performed by processor to control, and can be also used for performing inside it and deposit
The application code of storage.
In addition, the present embodiment additionally provides a kind of terminal device, as shown in figure 12, which includes：Transceiver
1201 and processor 1202, transceiver 1201 can include the components such as receiver, transmitter and antenna.The terminal device can be with
Other components such as including memory, the present embodiment is to this without limiting.
Processor 1202 is the control centre of terminal device, utilizes each of various interfaces and the entire terminal device of connection
A part is stored in by running or performing the software program being stored in memory and/or module and call in memory
Data, with perform the various functions of terminal device and/or processing data.
Transceiver 1201 is used for and wireless device, such as AP establishes communication connection, and at least one transmitting signal is sent
To AP, the data transmission between terminal device and wireless device is realized.Transceiver 1201 can include WLAN module, bluetooth mould
Block, base band (English：Base band) communication modules such as module and the corresponding radio frequency of the communication module (English：radio
Frequency, RF) circuit, for carrying out WLAN communication, Bluetooth communication, infrared communication and/or cellular communication
System communicates.Transceiver is used for the communication of each component in control terminal equipment, and can support direct memory access
(direct memory access)。
The embodiment of the present application additionally provides a kind of computer storage media, for saving as above-mentioned direct projection diameter shown in Fig. 8
Computer software instructions used in judgment method, it includes for performing the program designed by above method embodiment.By holding
The program of row storage, can realize the judgement to AP sighting distance states.
Although the application is described with reference to each embodiment herein, however, implementing the application claimed
In the process, those skilled in the art are by checking the attached drawing, disclosure and the appended claims, it will be appreciated that and it is real
Other variations of the existing open embodiment."a" or "an" is not excluded for multiple situations.Single processor or other units
It can realize several functions of being enumerated in claim.
Although the application is described with reference to specific features and embodiment, it is clear that, do not departing from this Shen
In the case of range please, it can be carry out various modifications and combined.Correspondingly, the specification and drawings are only appended right
It is required that the exemplary illustration of the application defined.Obviously, those skilled in the art can carry out various changes to the application
With modification without departing from scope of the present application.In this way, if these modifications and variations of the application belong to the application claim
Within the scope of, then the application is also intended to include these modifications and variations.
Claims (12)
1. a kind of direct projection diameter judgment method, which is characterized in that the method includes：
Wireless device obtains the wireless signal that terminal device is sent at least two moment, and each wireless signal is by least one hair
Signal composition is penetrated, at least one each transmitting signal emitted in signal passes through a paths and reaches the wireless device；
The wireless device handles each wireless signal, obtains all transmittings letter in each wireless signal
Number incoming wave angle；
The wireless device is by the coordinate click and sweep of each transmitting signal of wireless signal each at least two wireless signal
It is divided at least one track, and calculates probability of each track for the track of direct projection diameter, wherein, the coordinate points are each
Point of the time of incoming wave angle and the corresponding transmitting signal of the incoming wave angle in angle-time coordinate system；
The wireless device is according to the incoming wave angle of the determine the probability direct projection diameter.
2. according to the method described in claim 1, it is characterized in that, the wireless device will be at least two wireless signal
The coordinate points of each transmitting signal of each wireless signal are divided at least one track, including：
The wireless device was calculated at least two moment, and at least one transmitting signal at two neighboring moment corresponds to
Incoming wave angle differential seat angle；
The coordinate points are divided at least one track by the wireless device according to the differential seat angle.
3. according to the method described in claim 2, it is characterized in that, the wireless device according to the differential seat angle by the coordinate
Point is divided at least one track, including：
If the differential seat angle is less than or equal to predetermined angle, by the coordinate points of two incoming wave angles corresponding to the differential seat angle
It is divided into a track；
If the differential seat angle is more than the predetermined angle, by the coordinate points of two incoming wave angles corresponding to the differential seat angle
It is divided into two tracks.
4. according to the method described in claim 2, it is characterized in that, the wireless device calculate two neighboring moment it is described extremely
A few differential seat angle for emitting the corresponding incoming wave angle of signal, including：
The wireless device is pre- according to each incoming wave angle of each wireless signal before selected moment and the selected moment
Survey the incoming wave angle of at least one transmitting signal at next moment at the selected moment；
The wireless device calculates the incoming wave angle of at least one transmitting signal of the prediction and the practical selected moment
The differential seat angle of the incoming wave angle of at least one transmitting signal of subsequent time terminal device transmitting.
5. a kind of direct projection diameter judgment means, which is characterized in that described device includes：
Receiving unit, for obtaining the wireless signal that terminal device is sent at least two moment, each wireless signal is by least
One transmitting signal composition, at least one each transmitting signal emitted in signal are received by a paths；
Processing unit for handling each wireless signal, obtains all transmittings in each wireless signal
The incoming wave angle of signal divides the coordinate points of each transmitting signal of wireless signal each at least two wireless signal
For at least one track, and probability of each track for the track of direct projection diameter is calculated, according to the determine the probability direct projection diameter
Incoming wave angle, wherein, the coordinate points for each incoming wave angle and the incoming wave angle it is corresponding transmitting signal time exist
Point in angle-time coordinate system.
6. device according to claim 5, which is characterized in that
The processing unit is additionally operable to calculate at least two moment, at least one transmitting at two neighboring moment
The coordinate points are divided at least one track by the differential seat angle of the corresponding incoming wave angle of signal according to the differential seat angle.
7. device according to claim 6, which is characterized in that
The processing unit, will be corresponding to the differential seat angle if being additionally operable to the differential seat angle less than or equal to predetermined angle
The coordinate points of two incoming wave angles are divided into a track；If the differential seat angle is more than the predetermined angle, by the angle
The coordinate points for spending two incoming wave angles corresponding to difference are divided into two tracks.
8. device according to claim 6, which is characterized in that
The processing unit is additionally operable to each incoming wave according to each wireless signal before selected moment and the selected moment
Angle predicts the incoming wave angle of at least one transmitting signal at next moment at the selected moment, and calculates the prediction
The incoming wave angle of at least one transmitting signal is at least one with the subsequent time terminal device transmitting at the practical selected moment
Emit the differential seat angle of the incoming wave angle of signal.
9. a kind of wireless device, which is characterized in that the wireless device includes：Transceiver and processor,
The transceiver, for obtaining the wireless signal that terminal device is sent at least two moment, each wireless signal is by extremely
Few transmitting signal composition, at least one each transmitting signal emitted in signal reach the nothing by a paths
Line equipment；
The processor for handling each wireless signal, obtains all hairs in each wireless signal
The incoming wave angle of signal is penetrated, by the coordinate click and sweep of each transmitting signal of wireless signal each at least two wireless signal
It is divided at least one track, and calculates probability of each track for the track of direct projection diameter, according to the determine the probability direct projection
The incoming wave angle of diameter, wherein, time of the coordinate points for each incoming wave angle and the corresponding transmitting signal of the incoming wave angle
Point in angle-time coordinate system.
10. wireless device according to claim 9, which is characterized in that
The processor is additionally operable to calculate at least two moment, at least one transmitting letter at two neighboring moment
The differential seat angle of number corresponding incoming wave angle, and the coordinate points are divided by least one track according to the differential seat angle.
11. wireless device according to claim 10, which is characterized in that
The processor, if the differential seat angle is additionally operable to less than or equal to predetermined angle, by two corresponding to the differential seat angle
The coordinate points of a incoming wave angle are divided into a track；If the differential seat angle is more than the predetermined angle, by the angle
The coordinate points of two incoming wave angles corresponding to difference are divided into two tracks.
12. wireless device according to claim 11, which is characterized in that
The processor is additionally operable to according to each come wave angle of each wireless signal before selected moment and the selected moment
Degree predicts the incoming wave angle of at least one transmitting signal at next moment at the selected moment, and calculates the prediction extremely
The incoming wave angle of few transmitting signal and at least one hair of the subsequent time terminal device transmitting at the practical selected moment
Penetrate the differential seat angle of the incoming wave angle of signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611240124.2A CN108271245B (en) | 2016-12-28 | 2016-12-28 | Direct path judgment method and device |
| PCT/CN2017/118024 WO2018121439A1 (en) | 2016-12-28 | 2017-12-22 | Method and apparatus for determining direct path |
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| CN201611240124.2A CN108271245B (en) | 2016-12-28 | 2016-12-28 | Direct path judgment method and device |
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| CN113784282B (en) * | 2021-08-31 | 2023-08-15 | 北京京诚瑞达电气工程技术有限公司 | Wireless positioner calibration method and device |
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