CN103369668B - Wireless communication system is utilized to carry out the method for location positioning, device and mobile terminal - Google Patents
Wireless communication system is utilized to carry out the method for location positioning, device and mobile terminal Download PDFInfo
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Abstract
The invention provides and a kind of utilize wireless communication system to carry out the method for location positioning, device and mobile terminal, relate to wireless communication technology field.The method comprise the steps that positioner receives the Location Request for a mobile terminal；According to this Location Request, it is thus achieved that the emissive porwer of the downstream signal that multiple communities are launched to described mobile terminal and described downstream signal receiving intensity at described mobile terminal, the plurality of community includes Serving cell and the neighbor cell of described mobile terminal；The emissive porwer of described downstream signal, receiving intensity and the path loss model of predetermined transmission of wireless signals according to each community, calculates the distance between described mobile terminal and base station, respective cell；The distance between geographical position and calculated described mobile terminal and each cell base station according to each cell base station, determines the geographical position of described mobile terminal.The present invention can simplify the location positioning of mobile terminal, and reduce it and be implemented as this.
Description
Technical field
The present invention relates to wireless communication technology field, be specifically related to one and utilize wireless communication system that terminal is entered
Method, positioner and the mobile terminal of line position location.
Background technology
Along with developing rapidly of mobile communication, mobile terminal has been used widely, with people's daily life
Contact more and more tightr.Increasing application wishes to know the real-time geographical locations of mobile terminal, from
And propose the demand of mobile terminal locations location.
The localization method of mobile terminal common in the art, realizes based on satellite-signal, such as the whole world
Alignment system (GPS, Global Positioning System) localization method.This localization method needs
Installing positioning chip in terminal, this will increase the hardware cost of terminal.Further, this localization method depends on
Satellite-signal, therefore in the scene that cannot receive satellite-signal, (such as indoor), its application is restricted.
Summary of the invention
In view of this, the purpose of the embodiment of the present invention is to provide one and utilizes wireless communication system to carry out terminal position
Put the method for location, positioner and mobile terminal, in order to simplify the location positioning of mobile terminal, and reduce
It is implemented as this.
For solving above-mentioned technical problem, the embodiment of the present invention provides scheme as follows:
A kind of method utilizing wireless communication system to carry out location positioning, including:
Positioner receives the Location Request for a mobile terminal；
Described positioner is according to described Location Request, it is thus achieved that multiple communities are under described mobile terminal is launched
The emissive porwer of row signal and described downstream signal receiving intensity at described mobile terminal, the plurality of
Community includes Serving cell and the neighbor cell of described mobile terminal；
Described positioner is according to the emissive porwer of described downstream signal of each community, receiving intensity and pre-
The path loss model of the transmission of wireless signals first determined, calculate described mobile terminal and base station, respective cell it
Between distance；
Described positioner is whole according to geographical position and the calculated described movement of each cell base station
Distance between end and each cell base station, determines the geographical position that described mobile terminal is current.
Preferably, in said method,
Obtain the emissive porwer of the downstream signal that multiple community is launched and described descending to described mobile terminal
Signal receiving intensity at described mobile terminal, including:
Described positioner judges whether described mobile terminal is in service condition:
When described mobile terminal is in service condition, it is thus achieved that each community is under described mobile terminal is launched
The emissive porwer of row signal, and, obtain described mobile whole from the measurement report of described mobile terminal reporting
Hold the receiving intensity of the downstream signal to each community；
When described mobile terminal is in idle condition, carry out location updating by triggering described mobile terminal,
Obtaining in position updating process, each community is strong to the transmitting of the downstream signal that described mobile terminal is launched
The receiving intensity of the downstream signal to each community of degree and described mobile terminal reporting.
Preferably, in said method,
In distance between the described mobile terminal of described calculating and each cell base station, select more than presetting
The receiving intensity of thresholding, and then according to send out corresponding with selected receiving intensity of selected receiving intensity
Penetrate intensity and described path loss model, calculate between described mobile terminal and base station, respective cell away from
From.
Preferably, in said method,
Distance between the described mobile terminal of described calculating and base station, respective cell, including:
Obtaining the N group signal strength data group of a community, described signal strength data group includes community
The emissive porwer of downstream signal and the receiving intensity at described mobile terminal, N >=2；
According to described path loss model, it is calculated each group of transmission range corresponding to signal strength data groupN represents n-th group signal strength data group；
According to formula
Iterative computation obtains described mobile terminal and respective cell base
Distance d between standingN, wherein
α is default filter factor.
Preferably, in said method,
The described geographical position determining that described mobile terminal is current, including:
With the geographical position of cell base station, the distance as the center of circle, between described mobile terminal and this cell base station is
Radius a, it is thus achieved that overlay area of respective cell；
According to the described overlay area of each community obtained, determine the overlay region between described overlay area
Territory, obtains the geographical position that described mobile terminal is current.
The embodiment of the present invention additionally provides a kind of positioner, including:
Request reception unit, for receiving the Location Request for a mobile terminal；
Signal intensity obtains unit, for according to described Location Request, it is thus achieved that multiple communities are to described mobile whole
Emissive porwer and the reception at described mobile terminal of the described downstream signal of the downstream signal that end is launched are strong
Degree, the plurality of community includes Serving cell and the neighbor cell of described mobile terminal；
Metrics calculation unit, for the emissive porwer of described downstream signal according to each community, receiving intensity
And the path loss model of predetermined transmission of wireless signals, calculate described mobile terminal and respective cell
Distance between base station；
Position determination unit, for according to the geographical position of each cell base station and calculated described
Distance between mobile terminal and each cell base station, determines the geographical position that described mobile terminal is current.
Preferably, in above-mentioned positioner,
Described signal intensity obtains unit, specifically for judging whether described mobile terminal is in service condition:
When described mobile terminal is in service condition, it is thus achieved that each community is under described mobile terminal is launched
The emissive porwer of row signal, and, obtain described mobile whole from the measurement report of described mobile terminal reporting
Hold the receiving intensity of the downstream signal to each community；
When described mobile terminal is in idle condition, carry out location updating by triggering described mobile terminal,
Obtaining in position updating process, each community is strong to the transmitting of the downstream signal that described mobile terminal is launched
The receiving intensity of the downstream signal to each community of degree and described mobile terminal reporting.
Preferably, in above-mentioned positioner,
Described metrics calculation unit, in the distance calculated between described mobile terminal and each cell base station,
Select the receiving intensity more than pre-determined threshold, and then connect with selected according to selected receiving intensity
Receive emissive porwer corresponding to intensity and described path loss model, calculate described mobile terminal little with corresponding
Distance between base station, district.
Preferably, in above-mentioned positioner,
Described metrics calculation unit, specifically for:
Obtaining the N group signal strength data group of a community, described signal strength data group includes community
The emissive porwer of downstream signal and the receiving intensity at described mobile terminal, N >=2；
According to described path loss model, it is calculated each group of transmission range corresponding to signal strength data groupN represents n-th group signal strength data group；
According to formula
Iterative computation obtains described mobile terminal and respective cell base
Distance d between standingN, wherein
α is default filter factor.
Preferably, in above-mentioned positioner,
Described position determination unit, specifically for:
With the geographical position of cell base station, the distance as the center of circle, between described mobile terminal and this cell base station is
Radius a, it is thus achieved that overlay area of respective cell；
According to the described overlay area of each community obtained, determine the overlay region between described overlay area
Territory, obtains the geographical position that described mobile terminal is current.
The embodiment of the present invention additionally provides a kind of mobile terminal, including above-described positioner.
From the above it can be seen that the wireless communication system that utilizes that the embodiment of the present invention provides carries out terminal position
Put method and the positioner of location, it is possible to based on cell downlink signal emissive porwer and mobile terminal descending
Signal receiving strength, obtains the geographical location information of mobile terminal, from without installing extra GPS core
The hardware such as sheet, such that it is able to save hardware cost.Meanwhile, the embodiment of the present invention utilizes the signal of existing network
Treatment mechanism, as location updating mechanism or measurement report report mechanism, it is not necessary at the agreement of existing network
Reason mechanism does any change, can obtain the position of terminal, and therefore its implementation is more succinct, and can
Compatible with existing network protocol standard.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for location positioning described in the embodiment of the present invention；
Fig. 2 is to implement a kind of system structure schematic diagram of localization method described in the embodiment of the present invention；
Fig. 3 is the example schematic determining terminal location in the embodiment of the present invention based on the center of circle and radius；
The structural representation of the device of location positioning described in Fig. 4 embodiment of the present invention.
Detailed description of the invention
Embodiments provide a kind of method that mobile terminal is carried out location positioning, can apply to each
Kind of cordless communication network, as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and its
His network.Herein, term " network " and " system " use the most convertibly.Cdma network
The wireless technology of such as land wireless access (UTRA), CDMA2000 etc. can be realized.UTRA bag
Include other modification of wideband CDMA (WCDMA) and CDMA.CDMA2000 contain IS-2000,
IS-95 and IS-856 standard.TDMA network can realize such as global system for mobile communications (GSM)
Wireless technology.OFDMA network can realize the most evolved UTRA (E-UTRA), Ultra-Mobile Broadband
(UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20 etc.
Wireless technology.UTRA and E-UTRA is a part of Universal Mobile Telecommunications System (UMTS).3GPP
Long Term Evolution (LTE) and enhancement mode LTE (LTE-A) are the redactions of the UMTS using E-UTRA.
The document of third generation Partnership Program (3GPP) tissue describes UTRA, E-UTRA, UMTS,
LTE, LTE-A and GSM.The document of the tissue of third generation Partnership Program 2 (3GPP2) describes
CDMA2000 and UMB.Technique described herein may be used for above-mentioned wireless network and radiotechnics with
And other wireless networks and radiotechnics.
The embodiment of the present invention can utilize wireless communication system to realize the location positioning of mobile terminal, and its position is fixed
Position need not increase extra positioning chip on mobile terminals, and the realization of location positioning can't change
Data processing protocol flow process between existing terminal and network, it is possible to compatible existing network protocol.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and specifically real
Execute example to describe the present invention.
Refer to Fig. 1, the wireless communication system that utilizes described in the embodiment of the present invention carries out terminal location location
Method, including step:
Step 11, positioner receives the Location Request for a mobile terminal.
Here, described positioner can be in a network element of network side, its can by hardware and/
Or software realizes.According to different cordless communication networks, positioner can be arranged on different network entities
In.Such as, in gsm system, positioner can be arranged in mobile switching centre (MSC).
Here, Location Request can be the user of mobile terminal, is sent to network side by this mobile terminal
, it is also possible to it is other users wishing to obtain the positional information of described mobile terminal, directly sends out to network side
Send.Can carry the identity of described mobile terminal in described Location Request, this identity is permissible
It is the mark that can uniquely identify this mobile terminal, such as phone number, international mobile subscriber identity
(IMSI), international mobile equipment identification code (IMEI), medium education (MAC) address etc., with
Network side is enable to determine therefrom that unique corresponding mobile terminal.
Step 12, described positioner is according to described Location Request, it is thus achieved that multiple communities are to described mobile whole
Emissive porwer and the reception at described mobile terminal of the described downstream signal of the downstream signal that end is launched are strong
Degree, the plurality of community includes Serving cell and the neighbor cell of described mobile terminal.
Here, the quantity of the plurality of community is more than or equal to 3, specifically includes the service of described mobile terminal
Community and neighbor cell.These communities are generally adjacent in geographical position.When mobile terminal is in idle condition,
Its Serving cell is commonly called persistent district.Owing to mobile terminal is when being in service condition, will be periodically
Ground includes it in network side reporting measurement reports, this measurement report and measures the Serving cell and neighbour obtained
The information such as the signal receiving strength in district；And mobile terminal is when being in idle condition, generally will not be actively to end
End reports above-mentioned information.For obtaining signal receiving strength, the present embodiment in step 12, first determines whether institute
State mobile terminal and whether be in service condition:
If described mobile terminal is in service condition, then obtains each community and launch to described mobile terminal
The emissive porwer of downstream signal, and, from the measurement report of described mobile terminal reporting, obtain described shifting
The dynamic terminal receiving intensity to the downstream signal of each community；
If described mobile terminal is in idle condition, then carry out position more by the described mobile terminal of triggering
Newly；Positioner can also obtain in position updating process each community of network side to described mobile terminal
The emissive porwer of the downstream signal launched；Simultaneously as mobile terminal is in position updating process, will be to net
Network side reports the receiving intensity of the downstream signal to each community, and therefore positioner can be according to mobile terminal
Report, it is thus achieved that the described mobile terminal receiving intensity to the downstream signal of each community.
Here, signal intensity can characterize with incoming level or launching electrical level.
Step 13, described positioner is according to the emissive porwer of described downstream signal of each community, reception
Intensity and the path loss model of predetermined transmission of wireless signals, calculate described mobile terminal with corresponding
Distance between cell base station.
Here, according to the attenuation degree of downstream signal, utilize path loss model be calculated mobile terminal with
Distance between cell base station.Path loss model can use such as free space model, Bu Lingdun model,
EgLi model, Ha Ta (Hata) model, Ha Ta-village of Austria (Hata-Okumura) model etc..Due to often
Individual cell base station is usually constructed with its specific surrounding enviroment, it is preferable that the present embodiment can be for concrete community base
Station carries out drive test, according to the statistical result of drive test, is modified the path loss model used, is allowed to
More can meet the practical situation of this cell base station, and then in step 13, it is possible to use revised this is little
The path loss model of base station, district, calculates the distance between described mobile terminal and this cell base station.
Such as, a kind of computing formula of path loss PL (d) of Hata model is:
PL (d)=69.55+26.16lg (f)-13.82lg (hb)-a(hme)+(44.9-6.55lg(hb))lg(d)
Wherein, in above-mentioned formula, the physical significance of parameters is as follows:
D: the distance between dual-mode antenna, unit K m；
F: mid frequency, unit MHz；
hb: base station antenna height, unit m；
hme: mobile portable antennas height；
a(hme): mobile portable antennas height correction is followed, and is the function of coverage areas；
Wherein:
a(hme)=(11 × lg (f)-0.7) hme-(1.56×lg(f)-0.8)
According to the regulation of related protocol, in different wireless communication system, terminal is to the adjacent area quantity that network side feeds back
Can be different.Such as, in gsm system, the adjacent area quantity of terminal feedback may up to 6.Consider
The complexity calculated and necessity, the present embodiment can not all carry out above-mentioned distance and calculate all adjacent areas.
Preferably, the present embodiment can be selected the preferable adjacent area of received signal quality and calculate, such as,
In the distance calculated between described mobile terminal and each cell base station, signal intensity can be selected and be more than
The receiving intensity of pre-determined threshold, so corresponding with selected receiving intensity according to selected receiving intensity
Emissive porwer and described path loss model, calculate between described mobile terminal and base station, respective cell
Distance.Concrete, described thresholding can determine according to the signal intensity in concrete wireless communication system.
Or, the present embodiment can also select predetermined number according to the size of cell downlink signal receiving strength
The receiving intensity of amount (more than or equal to 3), such as, select 3 reception intensity values, correspond respectively to three
Community, so based on selected go out receiving intensity, carry out the calculating of described distance.
Step 14, described positioner is according to the geographical position of each cell base station and calculated
Distance between described mobile terminal and each cell base station, determines the geographical position that described mobile terminal is current
Put.
At step 14, the geographical position of cell base station can be the center of circle, described mobile end by the present embodiment
Distance between end and this cell base station is radius, obtains a circle or territory, sector coverage area.Such as, exist
Launch the antenna in cell of described downstream signal when being omnidirectional antenna, a circular coverage area will be obtained；Little
When district's antenna is non-omnidirectional antenna, according to the angle of coverage on this antenna in cell figure in the horizontal direction, will obtain
One territory, sector coverage area.Then, according to the described overlay area of each community obtained, determine described in cover
Overlapping region between cover region territory, described overlapping region is the geographical position that described mobile terminal is current, should
Overlapping region can be the region with certain area, it is also possible to a point.Here, it is also possible to further
With the position coordinates of described overlapping region central point, as the geographical position that described mobile terminal is current.
For improve distance calculate accuracy, the present embodiment in above-mentioned steps 13, for mobile terminal with
Distance between each cell base station, can carry out many based on the signal strength data group more than two obtained
Secondary calculating, multiple result of calculations are processed by final employing low-pass filtering mode, and obtain after process is final
As a result, as the distance between mobile terminal and this cell base station.Here, often group signal strength data group,
The emissive porwer of the downstream signal of the community obtained can be included in a position updating process and in institute
State the receiving intensity at mobile terminal, or be included in the transmitting of cell downlink signal in a preset time period
Intensity and the downstream signal reception intensity of this community extracted from terminal survey report.Here, when presetting
Between section be typically a short period, such as in 50ms, with reduce terminal within the time period it may happen that
The movement impact on measurement result.
Now, above-mentioned steps 13 specifically may include that
A) obtaining the N group signal strength data group of a community, described signal strength data group includes that this is little
The emissive porwer of the downstream signal in district and the receiving intensity at described mobile terminal, N >=2 here；
B) according to described path loss model, be calculated each group of transmission corresponding to signal strength data group away from
From
N represents n-th group signal strength data group, thus obtains N number of transmission range.
C) according to formula
Iterative computation obtains described mobile terminal and respective cell
Distance d between base stationN, wherein
α is default filter factor, can be generally between 0～1
A numerical value.
From the above it can be seen that the embodiment of the present invention based on cell downlink signal emissive porwer and moves eventually
The downstream signal reception intensity of end, utilizes the propagation model of wireless signal, obtains mobile terminal and each community
The distance of base station, and then the geographical location information of mobile terminal is obtained according to described distance.Owing to the present invention is real
Executing example only needs the wireless signal between network side and terminal to implement, and therefore need not to install extra
The hardware such as GPS chip, such that it is able to save hardware cost.Meanwhile, the embodiment of the present invention utilizes existing network
Signal processing mechanism, as location updating mechanism or measurement report report mechanism, it is not necessary to existing network
Protocol handler manufactures any change, can obtain the position of terminal, and therefore its implementation is more succinct,
And can be compatible with existing network protocol standard.
For being more fully understood that the above embodiment of the present invention, below by way of a gsm system citing, to above-mentioned
Embodiment makees more specific detail.For clarity sake, below for gsm system, the present embodiment is described
Some aspect, and use GSM term in following major part describes.
First, introduce positioner (LC, a Location Center) network element, provide the whole of this example
Individual system block diagram, refer to MSC shown in Fig. 2 and is connected with multiple base station controllers (BSC), each BSC
Multiple base station transceiver (BTS) can be connect the most again.Um Interface is passed through between mobile terminal and BTS
Carry out radio communication.In this example, LC specifically may be located in MSC, certainly may be located on other
In network element.
Before carrying out location positioning, need to obtain neighboring BS relationship, the downstream signals such as cell ID (CI)
The information such as transmitting, incoming level.If mobile terminal is in idle pulley, network side is entered by triggering terminal
Line position updates, and obtains neighboring BS relationship and transmitting, incoming level, wherein, connect in position updating process
Receiving level specifically can be from terminal at Separate Dedicated Control Channel (SDCCH, Stand-Alone Dedicated
Control Channel) on measurement report in obtain；If mobile terminal is in the pattern carrying out business,
Then network side can directly be known neighboring BS relationship and send out from the recent measurement report that terminal periodic reports
Penetrate, the information such as incoming level, wherein, incoming level specifically can be from terminal at Traffic Channel (TCH, Traffic
Channel) measurement report on obtains.Generally, in this example, location positioning is always initiated by LC,
Specifically may comprise steps of:
Step a), LC ask according to user, launch position position fixing process.
Step b), LC send position location request to MSC, it is desirable to MSC prepares relevant parameter.
Step c) MSC judges the current operating state of terminal: if terminal is in idle condition, then MSC
May require that launch position renewal process, then enter step d, it is achieved terminal is to the incoming level parameter of network side
Report；If terminal is in service condition, then can directly obtain from the measurement report that network side receives
Incoming level, subsequently into step d.Here, in the adjacent area maximum of mobile terminal, related protocol is followed in count off
Regulation.
Step c), MSC send position location request to BSC, it is desirable to BSC prepares parameter；BSC to
Corresponding BTS sends position location request, after knowing the persistent district of terminal, it may be determined that this community
Neighboring BS relationship, and then obtain the correlation reception level that terminal reports in position updating process, and by acquisition
Relevant parameter feeds back to LC by MSC, subsequently into step d.
Step d), LC know cell information and transmitting, incoming level, it is assumed that be total to acquisition here and include service
Community, the first adjacent area and the second adjacent area are in the relevant information of interior Gong Sange community.At this point it is possible to according to
Lower formula, is calculated the distance between these three community and terminal:
PL(dserv)=Pt-serv-Pr-serv
PL(dneib1)=Pt-neib1-Pr-neib1
PL(dneib2)=Pt-neib2-Pr-neib2
Wherein, PL (d) represents the path loss model of predetermined transmission of wireless signals, and this model is permissible
By the test of actual environment is modeled in advance；Pt-serv、Pt-neib1And Pt-neib2Represent respectively Serving cell,
First adjacent area and the transmitting power of the second adjacent area downstream signal；Pr-serv、Pr-neib1And Pr-neib2Represent service respectively
Community, the first adjacent area and second adjacent area downstream signal incoming level at mobile terminal；dserv、dneib1And dneib2
Represent the distance between mobile terminal and Serving cell, the first adjacent area and the second adjacent area respectively.
Step f), as it is shown on figure 3, with each cell base station as the center of circle, with corresponding distance dserv、dneib1With
dneib2For radius, obtaining three circles, the overlapping region between these three circle, shade as shown in Figure 3 is filled out
Fill part, be the geographical position that mobile terminal is current.
By above step, the geographical position that this example can position and real time tracking mobile terminal is current.
Refer to Fig. 4, the embodiment of the present invention additionally provides a kind of positioner, and this device includes:
Request reception unit, for receiving the Location Request for a mobile terminal；
Signal intensity obtains unit, for according to described Location Request, it is thus achieved that multiple communities are to described mobile whole
Emissive porwer and the reception at described mobile terminal of the described downstream signal of the downstream signal that end is launched are strong
Degree, the plurality of community includes Serving cell and the neighbor cell of described mobile terminal；
Metrics calculation unit, for the emissive porwer of described downstream signal according to each community, receiving intensity
And the path loss model of predetermined transmission of wireless signals, calculate described mobile terminal and respective cell
Distance between base station；
Position determination unit, for according to the geographical position of each cell base station and calculated described
Distance between mobile terminal and each cell base station, determines the geographical position that described mobile terminal is current.
Different operating state according to terminal, it is thus achieved that the mode of received signal strength can be otherwise varied.Now,
Described signal intensity obtains unit, specifically for judging whether described mobile terminal is in service condition:
When described mobile terminal is in service condition, it is thus achieved that each community is under described mobile terminal is launched
The emissive porwer of row signal, and, obtain described mobile whole from the measurement report of described mobile terminal reporting
Hold the receiving intensity of the downstream signal to each community；
When described mobile terminal is in idle condition, carry out location updating by triggering described mobile terminal,
Obtaining in position updating process, each community is strong to the transmitting of the downstream signal that described mobile terminal is launched
The receiving intensity of the downstream signal to each community of degree and described mobile terminal reporting.
For reducing amount of calculation, metrics calculation unit described in the present embodiment, calculating described mobile terminal with each
In distance between individual cell base station, select the receiving intensity more than pre-determined threshold, and then according to selected
The receiving intensity emissive porwer corresponding with selected receiving intensity and described path loss model,
Calculate the distance between described mobile terminal and base station, respective cell.
For providing the calculating accuracy of distance, the present embodiment use filtering mode carry out calculating process, now
Described metrics calculation unit, specifically for:
Obtaining the N group signal strength data group of a community, described signal strength data group includes community
The emissive porwer of downstream signal and the receiving intensity at described mobile terminal, N >=2；
According to described path loss model, it is calculated each group of transmission range corresponding to signal strength data groupN represents n-th group signal strength data group；
According to formula
Iterative computation obtains described mobile terminal and respective cell base
Distance d between standingN, wherein
α is default filter factor.
The current geographic position of terminal described in the present embodiment can be a point or certain area coverage,
I.e. one face, concrete, described position determination unit, can with the geographical position of cell base station as the center of circle,
Distance between described mobile terminal and this cell base station is radius, it is thus achieved that an area of coverage of respective cell
Territory；Then, according to the described overlay area of each community obtained, determine between described overlay area
Overlapping region, obtains the geographical position that described mobile terminal is current.
Finally, the embodiment of the present invention additionally provides a kind of mobile terminal, and this terminal includes above-described location
Device, it is also possible to including that other realizes the various unit of radio communication, here is omitted.
These many functional parts described in this description are all referred to as module, in order to specifically emphasize it
The independence of implementation.
In the embodiment of the present invention, module can realize with software, in order to is performed by various types of processors.
For example, the executable code module of a mark can include one or more physics of computer instruction
Or logical block, for example, it can be built as object, process or function.While it is true, marked
The executable code knowing module need not be physically located together, but can include being stored on diverse location
Different instructions, when combining in these command logics, it constitutes module and realizes this module
Regulation purpose.
It practice, executable code module can be individual instructions or many bar instructions, and even may be used
To be distributed on multiple different code segment, it is distributed in the middle of distinct program, and crosses over multiple memorizer and set
Back-up cloth.Similarly, operation data can be identified in module, and can be according to any suitable shape
Formula realizes and is organized in the data structure of any suitable type.Described operation data can be as single
Data set is collected, or can be distributed on diverse location and (be included in different storage device), and
Electronic signal can be only used as at least in part be present on system or network.
When module can utilize software to realize, it is contemplated that the level of existing hardware technique, it is possible to soft
The module that part realizes, in the case of not considering cost, those skilled in the art can build the hard of correspondence
Part circuit realizes the function of correspondence, and described hardware circuit includes ultra-large integrated (VLSI) of routine
Circuit or gate array and the existing quasiconductor of such as logic chip, transistor etc or other is discrete
Element.Module can also use programmable hardware device, such as field programmable gate array, programmable array
Logic, programmable logic device etc. realize.
The above is only embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these
Improvements and modifications also should be regarded as protection scope of the present invention.
Claims (8)
1. one kind utilizes the method that wireless communication system carries out location positioning, it is characterised in that including:
Positioner receives the Location Request for a mobile terminal, and described positioner is in network side
One network element；
Described positioner is according to described Location Request, it is thus achieved that multiple communities are under described mobile terminal is launched
The emissive porwer of row signal and described downstream signal receiving intensity at described mobile terminal, the plurality of
Community includes Serving cell and the neighbor cell of described mobile terminal；
Described positioner is according to the emissive porwer of described downstream signal of each community, receiving intensity and pre-
The path loss model of the transmission of wireless signals first determined, calculate described mobile terminal and base station, respective cell it
Between distance；
Described positioner is whole according to geographical position and the calculated described movement of each cell base station
Distance between end and each cell base station, determines the geographical position that described mobile terminal is current；
Wherein, the distance between the described mobile terminal of described calculating and base station, respective cell, including:
Obtaining the N group signal strength data group of a community, described signal strength data group includes community
The emissive porwer of downstream signal and the receiving intensity at described mobile terminal, N >=2；
According to described path loss model, it is calculated each group of transmission range corresponding to signal strength data groupN represents n-th group signal strength data group；
According to formulaIterative computation obtains described mobile terminal and respective cell base
Distance d between standingN, whereinα is default filter factor.
2. the method for claim 1, it is characterised in that
Obtain the emissive porwer of the downstream signal that multiple community is launched and described descending to described mobile terminal
Signal receiving intensity at described mobile terminal, including:
Described positioner judges whether described mobile terminal is in service condition:
When described mobile terminal is in service condition, it is thus achieved that each community is under described mobile terminal is launched
The emissive porwer of row signal, and, obtain described mobile whole from the measurement report of described mobile terminal reporting
Hold the receiving intensity of the downstream signal to each community；
When described mobile terminal is in idle condition, carry out location updating by triggering described mobile terminal,
Obtaining in position updating process, each community is strong to the transmitting of the downstream signal that described mobile terminal is launched
The receiving intensity of the downstream signal to each community of degree and described mobile terminal reporting.
3. the method for claim 1, it is characterised in that
In distance between the described mobile terminal of described calculating and each cell base station, select more than presetting
The receiving intensity of thresholding, and then according to send out corresponding with selected receiving intensity of selected receiving intensity
Penetrate intensity and described path loss model, calculate between described mobile terminal and base station, respective cell away from
From.
4. the method for claim 1, it is characterised in that
The described geographical position determining that described mobile terminal is current, including:
With the geographical position of cell base station, the distance as the center of circle, between described mobile terminal and this cell base station is
Radius a, it is thus achieved that overlay area of respective cell；
According to the described overlay area of each community obtained, determine the overlay region between described overlay area
Territory, obtains the geographical position that described mobile terminal is current.
5. a positioner, it is characterised in that described positioner is in a network element of network side,
Including:
Request reception unit, for receiving the Location Request for a mobile terminal；
Signal intensity obtains unit, for according to described Location Request, it is thus achieved that multiple communities are to described mobile whole
Emissive porwer and the reception at described mobile terminal of the described downstream signal of the downstream signal that end is launched are strong
Degree, the plurality of community includes Serving cell and the neighbor cell of described mobile terminal；
Metrics calculation unit, for the emissive porwer of described downstream signal according to each community, receiving intensity
And the path loss model of predetermined transmission of wireless signals, calculate described mobile terminal and respective cell
Distance between base station；
Position determination unit, for according to the geographical position of each cell base station and calculated described
Distance between mobile terminal and each cell base station, determines the geographical position that described mobile terminal is current；
Wherein, described metrics calculation unit, specifically for:
Obtaining the N group signal strength data group of a community, described signal strength data group includes community
The emissive porwer of downstream signal and the receiving intensity at described mobile terminal, N >=2；
According to described path loss model, it is calculated each group of transmission range corresponding to signal strength data groupN represents n-th group signal strength data group；
According to formulaIterative computation obtains described mobile terminal and respective cell base
Distance d between standingN, whereinα is default filter factor.
6. positioner as claimed in claim 5, it is characterised in that
Described signal intensity obtains unit, specifically for judging whether described mobile terminal is in service condition:
When described mobile terminal is in service condition, it is thus achieved that each community is under described mobile terminal is launched
The emissive porwer of row signal, and, obtain described mobile whole from the measurement report of described mobile terminal reporting
Hold the receiving intensity of the downstream signal to each community；
When described mobile terminal is in idle condition, carry out location updating by triggering described mobile terminal,
Obtaining in position updating process, each community is strong to the transmitting of the downstream signal that described mobile terminal is launched
The receiving intensity of the downstream signal to each community of degree and described mobile terminal reporting.
7. positioner as claimed in claim 5, it is characterised in that
Described metrics calculation unit, in the distance calculated between described mobile terminal and each cell base station,
Select the receiving intensity more than pre-determined threshold, and then connect with selected according to selected receiving intensity
Receive emissive porwer corresponding to intensity and described path loss model, calculate described mobile terminal little with corresponding
Distance between base station, district.
8. positioner as claimed in claim 5, it is characterised in that
Described position determination unit, specifically for:
With the geographical position of cell base station, the distance as the center of circle, between described mobile terminal and this cell base station is
Radius a, it is thus achieved that overlay area of respective cell；
According to the described overlay area of each community obtained, determine the overlay region between described overlay area
Territory, obtains the geographical position that described mobile terminal is current.
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