CN103997780A - Method for localizing mobile terminal, and base station - Google Patents
Method for localizing mobile terminal, and base station Download PDFInfo
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- CN103997780A CN103997780A CN201310053762.3A CN201310053762A CN103997780A CN 103997780 A CN103997780 A CN 103997780A CN 201310053762 A CN201310053762 A CN 201310053762A CN 103997780 A CN103997780 A CN 103997780A
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Abstract
The invention provides a method for localizing a mobile terminal. The method comprises the following steps that: a base station sends a reference signal to a mobile terminal periodically; a base station receives first parameter information sent by the mobile terminal and measures and calculates an NLOS zone in an area under administration according to the first parameter information; when entrance of the mobile terminal into the NLOS zone is detected, the base station obtains arrival time ToA of the mobile terminal and adjusts the obtained ToA and the base station measures and calculates arrival time AoA of the mobile terminal and adjusts the AoA obtained by measurement and calculation; and the base station localizes the mobile terminal according to the adjusted ToA and AoA. In addition, the invention also provides a base station using the method. According to the method and the base station using the same, location information of the mobile terminal can be calibrated, thereby improving the location precision of the mobile terminal by the base station.
Description
Technical field
The present invention relates to mobile communication technology field, particularly, the present invention relates to method and the base station of localisation of mobile terminals.
Background technology
Wireless communication system has become a kind of main communication mode, by the global most people of which, can communicate.It is more and more less that Wireless Telecom Equipment becomes, simultaneously function from strength to strength, to satisfy the demands of consumers and to improve portability and convenience.
Wavelength from 10 millimeters to 1 millimeter, the electromagnetic wave of frequency from 30 gigahertz (GHZ)s (GHz) to 300 gigahertz (GHZ)s (GHz) be called millimeter wave.Utilize method that millimeter wave communicates millimetre-wave attenuator.The millimetre-wave attenuator decimillimeter wave wave guide communication two large classes of communicating by letter with millimeter wqve radio.The advantage of millimetre-wave attenuator is: 1, available band is extremely wide, and millimere-wave band frequency bandwidth is 270 gigahertz (GHZ)s (GHz), is 10,000 times of whole short-wave band; 2, high directivity, good confidentiality; 3, disturb very little, the almost impact of static-free, cosmic interference and industrial interference, thereby communication is stable.
At present, the R&D work of 60GHz millimetre-wave attenuator just becomes increasingly active.IEEE 802.11 working groups formulate IEEE 802.11ad standard for 60GHz millimeter wave.This technological side, to application such as PC, digital household appliances, can be realized the ultrahigh speed wireless transmission that equipment room is counted Gbps.Under the actively promoting of Duo Jia in the field of business manufacturer, millimetre-wave attenuator application from now on will constantly be expanded.The problem that this technology faces is at present that components and parts cost is higher.Millimetre-wave attenuator is mainly used in realizing the non-compression high definition transmission of video in family now, if its application can extend to mobile phone and office equipment, so, along with the increase of shipment amount, its cost can significantly reduce.
Although millimetre-wave attenuator has the feature of high directivity, oxygen declines and rain declines to millimetre-wave attenuator obvious effect.Meanwhile, leaf also can have impact to millimetre-wave attenuator.In order to improve millimetre-wave attenuator distance to adapt to outdoor mobile communication, just need to adopt beam forming technique.For terminal, also need to carry out the reception of beam forming.Yet in non line of sight (NLOS) application scenarios, the signal of millimere-wave band cannot cut-through thing, if base station wishes to continue to communicate with mobile terminal, just need to pass through reflection path.By in the application scenarios of reflection path, adopt arrival time difference (TDOA) or the angle of arrival (AoA) will produce huge error in conjunction with the localization method of the time of advent (ToA).Reason is, the time of advent of base station measurement and the emission angle of signal are not very accurate.
In view of this, industry is needed badly and is solved the problems referred to above that exist in existing wireless communications, need to propose new solution, calibrates the locating information to mobile terminal, to promote positioning precision.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, particularly provides a kind of method of localisation of mobile terminals and the base station of using the method, to promote the positioning precision of base station to mobile terminal.
A kind of method that the invention provides localisation of mobile terminals, comprises the following steps: base station sends reference signal to mobile terminal period; The first parameter information that base station mobile terminal receive sends, and calculate local NLOS region according to the first parameter information; When mobile terminal being detected and enter NLOS region, base station obtains the ToA adjust the ToA the getting time of advent of this mobile terminal, and base station is calculated the arrival angle AoA of this mobile terminal and adjusts the AoA that measuring and calculating is arrived; Base station is according to ToA and AoA localisation of mobile terminals after adjusting.
The present invention also provides a kind of base station, comprising: sending module, for sending reference signal to mobile terminal period; Receiver module, the first parameter information sending for mobile terminal receive, and calculate local NLOS region according to the first parameter information; Calibration module, for when mobile terminal being detected and enter NLOS region, adjust the ToA adjust the ToA the getting time of advent that obtains this mobile terminal, and base station is calculated the arrival angle AoA of this mobile terminal and adjusts the AoA that measuring and calculating is arrived; Locating module, for according to ToA and AoA localisation of mobile terminals after adjusting.
The method of localisation of mobile terminals provided by the invention and the base station of using the method, the locating information of calibration to mobile terminal, to promote the positioning precision of base station to mobile terminal.
The such scheme that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.
The aspect that the present invention is additional and advantage in the following description part provide, and these will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 shows the flow chart of the method for localisation of mobile terminals according to an embodiment of the present invention;
Fig. 2 shows the scene schematic diagram in definite NLOS region according to an embodiment of the present invention;
Fig. 3 shows the scene schematic diagram that definite mobile terminal according to an embodiment of the present invention enters NLOS region;
Fig. 4 shows the flow chart of calculating the first calibration factor according to an embodiment of the present invention;
Fig. 5 shows the flow chart of calculating first calibration factor of another execution mode according to the present invention;
Fig. 6 show according to an embodiment of the present invention according to the flow chart of the ToA localisation of mobile terminals after adjusting;
The mobile terminal that Fig. 7 shows according to an embodiment of the present invention deviates from the schematic diagram that reflector moves;
Fig. 8 shows the schematic diagram that mobile terminal according to an embodiment of the present invention moves relative to reflector;
Fig. 9 shows the flow chart of calculating the second calibration factor according to an embodiment of the present invention;
Figure 10 shows the structural representation of base station according to an embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Unless those skilled in the art of the present technique are appreciated that specially statement, singulative used herein " ", " one ", " " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording of using in specification of the present invention " comprises " and refers to and have feature, integer, step, operation, element and/or assembly, but do not get rid of, do not exist or adds one or more other features, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " when another element, it can be directly connected or coupled to other elements, or also can have intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises arbitrary unit of listing item and all combinations that one or more is associated.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have with the present invention under the identical meaning of the general understanding of those of ordinary skill in field.Should also be understood that such as those terms that define in general dictionary and should be understood to have the consistent meaning of meaning in the context with prior art, unless and definition as here, can not explain by idealized or too formal implication.
Those skilled in the art of the present technique are appreciated that " terminal " used both comprised the equipment only possessing without the wireless signal receiver of emissivities here, comprise again having on bidirectional communication link, carrying out the reception of two-way communication and the equipment of transmitting hardware.This equipment can comprise: tool is with or without honeycomb or other communication equipments of multi-line display; Can combine voice and the PCS Personal Communications System (PCS) of data processing, fax and/or its communication ability; The PDA(Personal Digital Assistant) that can comprise radio frequency receiver and beep-pager, the Internet/intranet access, web browser, notepad, calendar and/or global positioning system (GPS) receiver; And/or the routine that comprises radio frequency receiver is on knee and/or palmtop computer or other equipment.Here " terminal equipment " that used can be portable, can transport, be arranged in the vehicles (aviation, sea-freight and/or land), or be suitable for and/or be configured to local runtime and/or with distribution form in the operation of any other position in the earth and/or space.Here " terminal equipment " that used can also be communication terminal, access terminals, music/video playback terminal.Here " terminal equipment " that used can also be PDA, MID and/or the mobile phone with music/video playing function etc.Here " terminal equipment " that used can also be the equipment such as intelligent television, Set Top Box.Correspondingly, " base station " or " base station equipment " is corresponding to " terminal ", " terminal equipment " communication equipment in network opposite side.
Fig. 1 shows the flow chart of the method for localisation of mobile terminals according to an embodiment of the present invention.Method comprises the following steps: S10, base station send reference signal to mobile terminal period; The first parameter information that S20, base station mobile terminal receive send, and calculate local NLOS region according to the first parameter information; S30, when mobile terminal being detected and enter NLOS region, base station obtains the ToA adjust the ToA the getting time of advent of this mobile terminal, and base station is calculated the arrival angle AoA of this mobile terminal and adjusts the AoA that measuring and calculating is arrived; S40, base station are according to ToA and AoA localisation of mobile terminals after adjusting.
Fig. 2 shows the scene schematic diagram in definite NLOS region according to an embodiment of the present invention.As a kind of execution mode, as shown in Figure 2, millimeter wave base station (mm Wave) BS1, BS2, BS3 send reference signal to mobile terminal period respectively.Because millimeter wave frequency band cannot be walked around shelter (Defend Objective), thereby can determine the region that signal cannot arrive in the coverage of three millimeter wave base stations, these regions are exactly the alleged non line of sight region of the present invention (NLOS region).In addition, millimeter wave runs into shelter and also can reflect, and base station can be according to the input NLOS region of reflection.The first parameter information that base station can mobile terminal receive sends, and calculate local NLOS region according to the first parameter information.Wherein, the first parameter information comprises: signal strength signal intensity indication (RSSI) and carrier-in-interference noise ratio (CINR).
Fig. 3 shows the scene schematic diagram that definite mobile terminal according to an embodiment of the present invention enters NLOS region.As a kind of execution mode, as shown in Figure 3, when mobile terminal being detected, enter NLOS region (, net region shown in Fig. 3) time, the ToA time of advent that base station obtains this mobile terminal also adjusts the ToA getting, and base station is calculated the arrival angle AoA of this mobile terminal and adjusts the AoA that measuring and calculating is arrived; Subsequently, according to ToA and AoA localisation of mobile terminals after adjusting.Therefore, ToA and the AoA localisation of mobile terminals after adjustment can be passed through in base station, thereby realizes the lifting of base station to mobile terminal positioning precision.
Fig. 4 shows the flow chart of calculating the first calibration factor according to an embodiment of the present invention.As a kind of execution mode of step S30, base station BS periodically sends reference signal to mobile terminal MS; Then, mobile terminal MS is measured RSSI and CINR signal and is sent to base station BS; Then, base station BS judgement mobile terminal MS is in LOS sighting distance region or NLOS region; When judging mobile terminal MS, be during in NLOS region, base station BS sends reference signal to mobile terminal MS again; Then signal strength signal intensity indication RSSI, the carrier-in-interference noise ratio CINR that, mobile terminal MS measure to receive, the time of advent ToA, arrival direction DoA and beam shaping emission angle and send to base station BS; Then, base station BS calculates the first calibration factor η.
Can obtain the first calibration factor η by setting up the mode of calibration factor database.Calibration factor database can be set up in the following way: first, accessory terminal is arranged in NLOS region, makes base station the RSSI of this accessory terminal be detected; Then, base station can obtain the distance d through reflection of accessory terminal and base station by RSSI
1; Then, because accessory terminal can obtain position coordinates by the navigation system of self, by
formula obtains the air line distance of accessory terminal and base station; Then according to formula η=d
2/ d
1calculate and set up calibration factor database.Calibration factor database can be configured in location server (location server), also can be configured in base station.In addition, auxiliary parameter, for example RSSI, CINR and DOA also can measure in the lump and leave in calibration factor database, using as the Rule of judgment of selecting η.
Particularly, when real terminal to be measured enters NLOS region, the ToA time of advent that base station obtains this mobile terminal also adjusts the ToA getting, comprise: when mobile terminal being detected and enter NLOS region, base station sends reference signal to mobile terminal, and the second parameter information that mobile terminal receive sends, wherein, the second parameter information comprises: the emission angle of RSSI, CINR, ToA, DoA and beam shaping; The first calibration factor is calculated according to the second parameter information in base station, and the ToA that adopts the first calibration factor adjustment to get.
Fig. 5 shows the flow chart of calculating first calibration factor of another execution mode according to the present invention.As the another kind of execution mode of step S30, base station BS periodically sends reference signal to mobile terminal MS; Then, mobile terminal MS is measured RSSI and CINR signal and is sent to base station BS; Then, base station BS judgement mobile terminal MS is in LOS region or NLOS region; When judging mobile terminal MS, be during in NLOS region, base station B S sends reference signal to mobile terminal MS again; Then, mobile terminal MS is measured the second parameter information, and calculates the first calibration factor η, and wherein, the second parameter information comprises: the emission angle of RSSI, CINR, ToA, DoA and beam shaping; Then, mobile terminal MS reports the first calibration factor η to base station BS.Particularly, when mobile terminal being detected and enter NLOS region, base station obtains the ToA adjust the ToA the getting time of advent of this mobile terminal, comprising: when mobile terminal being detected and enter NLOS region, base station sends reference signal to mobile terminal; When this mobile terminal is calculated according to reference signal after the first calibration factor, the first calibration factor that base station mobile terminal receive sends, and the ToA that adopts the first calibration factor adjustment to get.As from the foregoing, the mode that base station obtains the first calibration factor can comprise two kinds of modes: first kind of way, and the first calibration factor is calculated by the second parameter information in base station; The second way, the first calibration factor of base station receiving terminal measuring and calculating.One of ordinary skill in the art will appreciate that for measuring and calculating the first calibration factor, both can carry out in end side, also can complete in base station side.
Fig. 6 show according to an embodiment of the present invention according to the flow chart of the ToA localisation of mobile terminals after adjusting.Base station BS is to mobile terminal MS sending direction request signal.Then, mobile terminal MS is measured moving direction, and moving direction information is reported to base station BS.Then, base station BS calculates the first calibration factor η according to the moving direction information receiving, and adjusts ToA parameter by the first calibration factor η.Particularly, the ToA that base station adopts the first calibration factor adjustment to get, comprising: base station sends traffic direction and translational speed report request to mobile terminal; Moving direction and the translational speed of the relative reflector of base station mobile terminal receive report, and adjust the first calibration factor according to moving direction and translational speed.
Further, η is calculated according to the emission angle of RSSI, CINR, ToA, DoA and the beam shaping of report in base station, to adjust RD in relative time delay.For example, RD=ToA
1η
1-ToA
2η
2, wherein, ToA
1η
1be the ToA after base station BS 1 is adjusted, ToA2 η 2 is the ToA after base station BS 2 is adjusted.ToA
1η
1with the difference of ToA2 η 2 be exactly the relative time delay after correcting.According to this relative time delay, base station can utilize TDOA method to determine terminal location.
Utilize when adjusting the factor, have an implicit factor to need to consider, that is exactly the relation of the moving direction of reflector and mobile terminal.The mobile terminal that Fig. 7 shows according to an embodiment of the present invention deviates from the schematic diagram that reflector moves.When mobile terminal deviates from reflector, move, first adjusts factor η just needs to increase, and η is increased to η 1 from initial condition η 0, η 1=η 0+ △ η.Fig. 8 shows the schematic diagram that mobile terminal according to an embodiment of the present invention moves relative to reflector.When mobile terminal moves relative to reflector, first adjusts factor η just needs to reduce, and η reduces to η 1 from initial condition η 0, η 1=η 0-△ η.Particularly, moving direction and the translational speed of the relative reflector of base station mobile terminal receive report, and adjust the first calibration factor according to moving direction and translational speed, comprising: the moving direction of judging the relative reflector of mobile terminal when base station when deviating from, increases by the first calibration factor; Or the moving direction of judging the relative reflector of mobile terminal when base station near time, reduce by the first calibration factor.
Fig. 9 shows the flow chart of calculating the second calibration factor according to an embodiment of the present invention.As a kind of execution mode of step S103, base station BS periodically sends the request of up sounding reference signal to mobile terminal MS; Then, mobile terminal MS is measured up sounding reference signal and is sent to base station BS; Then, base station BS calculates the second calibration factor.Particularly, when mobile terminal being detected and enter NLOS region, the AoA that base station adjustment is calculated, comprise: when mobile terminal being detected and enter NLOS region, base station sends the request of up sounding reference signal to mobile terminal, and mobile terminal receive sends the sounding reference signal of multiple directions; The second calibration factor is calculated according to the sounding reference signal of multiple directions in base station, and the AoA that adopts the second calibration factor adjustment to calculate.
A kind of execution mode of adjusting the angle of estimating AoA will be described in detail below.If the direction of arrival of the j bar reflection path of the terminal that i base station records is θ
ij, the error that non line of sight is introduced is ε
ij, this parameter ε
ijit is exactly the second calibration factor.The position of travelling carriage is made as (x, y), and the position of base station is (xi, yi), and N represents the quantity of base station, and M represents the quantity of the incident path of certain base station, and Rm represents the radiation radius of MS, has:
According to expanded-angle, be all not more than maximum angle expansion theorem, have following inequality constraints to be:
Under non-line-of-sight propagation, the location of travelling carriage can be realized by the non-linear least square problem of solution inequality below,
Can solve above-mentioned inequality linear least-squares problem according to structure method of inner penalty function method.
In formula
Wherein: R is the radius of terminal MS fringe area, λ is not more than 0 the factor, and AoA angle between base station and terminal is finally estimated according to the incident footpath of many different directions in base station, and wherein, in above formula, M represents incident footpath number.
As from the foregoing, the mode that base station obtains the second calibration factor comprises: the sounding reference signal that base station is passed through is calculated the second calibration factor.
The method of localisation of mobile terminals provided by the invention can be calibrated the locating information to mobile terminal, to promote the positioning precision of base station to mobile terminal.
Figure 10 shows the structural representation of base station according to an embodiment of the present invention.Base station 100 can comprise: sending module 110, for sending reference signal to mobile terminal period; Receiver module 120, the first parameter information sending for mobile terminal receive, and calculate local NLOS region according to the first parameter information; Calibration module 130, for when mobile terminal being detected and enter NLOS region, adjusts the ToA adjust the ToA the getting time of advent that obtains this mobile terminal, and for calculating the arrival angle AoA of this mobile terminal and adjusting the AoA that measuring and calculating is arrived; Locating module 140, for according to ToA and AoA localisation of mobile terminals after adjusting.
Further, calibration module 130 comprises: the first alignment unit, for entering NLOS region mobile terminal being detected, by sending module 110, to mobile terminal, send reference signal, and after the second parameter information sending by receiver module 120 mobile terminal receives, according to the second parameter information, calculate the first calibration factor, and the ToA that adopts the first calibration factor adjustment to get.
Further, calibration module 130 comprises: the second alignment unit, for entering NLOS region mobile terminal being detected, by sending module 110, to mobile terminal, send reference signal, and after the first calibration factor sending by receiver module 120 mobile terminal receives, the ToA that adopts the first calibration factor adjustment to get.
Further, the first parameter information comprises: RSSI and CINR.
Further, the second parameter information comprises: the emission angle of RSSI, CINR, ToA, DoA and beam shaping.
Further, calibration module 130 also comprises: adjustment unit, for sending traffic direction and translational speed report request by sending module 110 to mobile terminal, and after the moving direction and translational speed of the relative reflector of reporting by receiver module 120 mobile terminal receives, according to moving direction and translational speed, adjust the first calibration factor.
Further, adjustment unit is further used for: at the moving direction of judging the relative reflector of mobile terminal, when deviating from, increase by the first calibration factor; Or the moving direction of judging the relative reflector of mobile terminal near time, reduce by the first calibration factor.
Further, calibration module 130 comprises: the 3rd alignment unit, for when mobile terminal being detected and enter NLOS region, by sending module 110, to mobile terminal, send the request of up sounding reference signal, and after sending the sounding reference signal of multiple directions by receiver module 120 mobile terminal receives, according to the sounding reference signal of multiple directions, calculate the second calibration factor, and the AoA that adopts the second calibration factor adjustment to calculate.
The locating information to mobile terminal can be calibrated in base station provided by the invention, to promote the positioning precision of base station to mobile terminal.
Those skilled in the art of the present technique are appreciated that the present invention can relate to for carrying out the equipment of the one or more operation in the application's operation.Equipment can be required object specialized designs and manufacture, or also can comprise the known device in all-purpose computer, and all-purpose computer has storage procedure Selection within it and activates or reconstruct.Such computer program (for example can be stored in equipment, computer), in computer-readable recording medium or be stored in the medium of any type that is suitable for store electrons instruction and is coupled to respectively bus, computer-readable medium includes but not limited to the dish (comprising floppy disk, hard disk, CD, CD-ROM and magneto optical disk) of any type, memory (RAM), read-only memory (ROM), electrically programmable ROM, electric erasable ROM(EPROM immediately), electrically erasable ROM(EEPROM), flash memory, magnetic card or light card.Computer-readable recording medium comprises for any mechanism with for example, by the storage of the readable form of equipment (, computer) or transmission information.For example, computer-readable recording medium comprises memory (RAM) immediately, read-only memory (ROM), magnetic disk storage medium, optical storage medium, flash memory device, the signal (such as carrier wave, infrared signal, digital signal) propagated with electricity, light, sound or other form etc.
Those skilled in the art of the present technique are appreciated that and can realize each frame in these structure charts and/or block diagram and/or flow graph and the combination of the frame in these structure charts and/or block diagram and/or flow graph with computer program instructions.The processor that these computer program instructions can be offered to all-purpose computer, special purpose computer or other programmable data processing methods generates machine, thereby the instruction of carrying out by the processor of computer or other programmable data processing methods has created for the frame of implementation structure figure and/or block diagram and/or flow graph or the method for a plurality of frame appointments.
Those skilled in the art of the present technique be appreciated that step in the various operations discussed in the present invention, method, flow process, measure, scheme can by alternately, change, combination or delete.Further, have other steps in the various operations discussed in the present invention, method, flow process, measure, scheme also can by alternately, change, reset, decompose, combination or delete.Further, of the prior art have with the present invention in step in disclosed various operations, method, flow process, measure, scheme also can by alternately, change, reset, decompose, combination or delete.
Below be only part execution mode of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (16)
1. a method for localisation of mobile terminals, is characterized in that, comprises the following steps:
Base station sends reference signal to mobile terminal period;
The first parameter information that described base station mobile terminal receive sends, and calculate local NLOS region according to described the first parameter information;
When described mobile terminal being detected and enter NLOS region,
The ToA time of advent that described base station obtains described mobile terminal also adjusts the ToA getting, and
Described base station is calculated the arrival angle AoA of described mobile terminal and is adjusted the AoA that measuring and calculating is arrived;
The base station of telling according to ToA and AoA after adjusting, locate described mobile terminal.
2. the method for claim 1, is characterized in that, when described mobile terminal being detected and enter NLOS region, described base station obtains the ToA adjust the ToA the getting time of advent of described mobile terminal, comprising:
When described mobile terminal being detected and enter NLOS region, described base station sends reference signal to mobile terminal, and receives the second parameter information that described mobile terminal sends;
The first calibration factor is calculated according to described the second parameter information in described base station, and the ToA that adopts described the first calibration factor adjustment to get.
3. the method for claim 1, is characterized in that, when described mobile terminal being detected and enter NLOS region, described base station obtains the ToA adjust the ToA the getting time of advent of described mobile terminal, comprising:
When described mobile terminal being detected and enter NLOS region, described base station sends reference signal to described mobile terminal;
Described base station receives described the first calibration factor that described mobile terminal sends, and the ToA that adopts described the first calibration factor adjustment to get; Wherein, described the first calibration factor is obtained according to described the second parameter information measuring and calculating by described mobile terminal.
4. the method as described in arbitrary claim in claims 1 to 3, is characterized in that, described the first parameter information comprises: RSSI and CINR.
5. the method as described in arbitrary claim in claims 1 to 3, is characterized in that, described the second parameter information comprises: the emission angle of RSSI, CINR, ToA, DoA and beam shaping.
6. the method described in claim 2 or 3, is characterized in that, the ToA that described base station adopts described the first calibration factor adjustment to get, also comprises:
Described base station sends traffic direction and translational speed report request to described mobile terminal;
Described base station receives moving direction and the translational speed of the relative reflector of described mobile terminal report, and adjusts described the first calibration factor according to described moving direction and translational speed.
7. method as claimed in claim 6, is characterized in that, described base station receives moving direction and the translational speed of the relative reflector of described mobile terminal report, and adjusts described the first calibration factor according to described moving direction and translational speed, comprising:
The moving direction of judging the relative reflector of described mobile terminal when described base station when deviating from, increases described the first calibration factor; Or
The moving direction of judging the relative reflector of described mobile terminal when described base station near time, reduce described the first calibration factor.
8. the method as described in arbitrary claim in claims 1 to 3, is characterized in that, when described mobile terminal being detected and enter NLOS region, the AoA that the adjustment of described base station is calculated, comprising:
When described mobile terminal being detected and enter NLOS region, described base station sends the request of up sounding reference signal to described mobile terminal, and receives the sounding reference signal that described mobile terminal sends multiple directions;
The second calibration factor is calculated according to the sounding reference signal of described multiple directions in described base station, and the AoA that adopts described the second calibration factor adjustment to calculate.
9. a base station, is characterized in that, comprising:
Sending module, for sending reference signal to described mobile terminal period;
Receiver module, the first parameter information sending for receiving described mobile terminal, and calculate local NLOS region according to described the first parameter information;
Calibration module, for when described mobile terminal being detected and enter NLOS region, obtains the ToA adjust the ToA the getting time of advent of described mobile terminal, and for calculating the arrival angle AoA of described mobile terminal and adjusting the AoA that measuring and calculating is arrived;
Locating module, for according to ToA and AoA localisation of mobile terminals after adjusting.
10. base station as claimed in claim 9, is characterized in that, described calibration module comprises:
The first alignment unit, for entering NLOS region described mobile terminal being detected, for sending reference signal by described sending module to described mobile terminal, and receive the second parameter information of described mobile terminal transmission by described receiver module after, according to described the second parameter information, calculate the first calibration factor, and the ToA for adopting described the first calibration factor adjustment to get.
11. base stations as claimed in claim 9, is characterized in that, described calibration module comprises:
The second alignment unit, for when described mobile terminal being detected and enter NLOS region, by described sending module, to described mobile terminal, send reference signal, and receive the first calibration factor of described mobile terminal transmission by described receiver module after, the ToA that adopts described the first calibration factor adjustment to get.
12. base stations as described in arbitrary claim in claim 9 to 11, is characterized in that, described the first parameter information comprises: RSSI and CINR.
13. base stations as described in arbitrary claim in claim 9 to 11, is characterized in that, described the second parameter information comprises: the emission angle of RSSI, CINR, ToA, DoA and beam shaping.
14. base stations as described in arbitrary claim in claim 10 or 11, is characterized in that, described calibration module also comprises:
Adjustment unit, for sending traffic direction and translational speed report request by described sending module to described mobile terminal, and receive the moving direction and translational speed of relative reflector of described mobile terminal report by described receiver module after, according to described moving direction and translational speed, adjust described the first calibration factor.
15. base stations as claimed in claim 14, is characterized in that, described adjustment unit is further used for:
At the moving direction of judging the relative reflector of described mobile terminal, when deviating from, increase described the first calibration factor; Or
The moving direction of judging the relative reflector of described mobile terminal near time, reduce described the first calibration factor.
16. base stations as described in arbitrary claim in claim 9 to 11, is characterized in that, described calibration module comprises:
The 3rd alignment unit, for when mobile terminal being detected and enter NLOS region, by described sending module, to described mobile terminal, send the request of up sounding reference signal, and receive the sounding reference signal of described mobile terminal transmission multiple directions by receiver module after, according to the sounding reference signal of described multiple directions, calculate the second calibration factor, and the AoA that adopts the second calibration factor adjustment to calculate.
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| CN201310053762.3A Pending CN103997780A (en) | 2013-02-19 | 2013-02-19 | Method for localizing mobile terminal, and base station |
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| CN106950528A (en) * | 2017-03-24 | 2017-07-14 | 杭州电子科技大学 | A kind of Wave arrival direction estimating method based on linear FM signal |
| CN106950528B (en) * | 2017-03-24 | 2019-12-10 | 杭州电子科技大学 | direction-of-arrival estimation method based on linear frequency modulation signals |
| CN107484138A (en) * | 2017-08-14 | 2017-12-15 | 北京小米移动软件有限公司 | Micro-base station localization method and device |
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| CN111082907B (en) * | 2018-10-22 | 2021-06-01 | 成都华为技术有限公司 | Method and device for determining measurement value of reference signal |
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| CN112505622A (en) * | 2020-11-17 | 2021-03-16 | 东南大学 | High-precision single-base-station indoor positioning method |
| CN112505622B (en) * | 2020-11-17 | 2024-02-02 | 东南大学 | High-precision single-base-station indoor positioning method |
| CN112346009A (en) * | 2021-01-06 | 2021-02-09 | 广东省新一代通信与网络创新研究院 | Positioning method and system based on intelligent reflecting surface |
| CN112346009B (en) * | 2021-01-06 | 2021-04-16 | 广东省新一代通信与网络创新研究院 | Positioning method and system based on intelligent reflecting surface |
| CN113950084A (en) * | 2021-10-20 | 2022-01-18 | 国网北京市电力公司 | Calibration method of base station, device thereof, computer readable storage medium and processor |
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