CN1154380C - Method for locating user devices in cellular mobile communication system - Google Patents
Method for locating user devices in cellular mobile communication system Download PDFInfo
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- CN1154380C CN1154380C CNB011262737A CN01126273A CN1154380C CN 1154380 C CN1154380 C CN 1154380C CN B011262737 A CNB011262737 A CN B011262737A CN 01126273 A CN01126273 A CN 01126273A CN 1154380 C CN1154380 C CN 1154380C
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Abstract
The present invention relates to a method for positioning a user device in a cellular mobile communication system, which comprises the steps that a base station controller respectively obtains a measured receiving and transmitting time difference of the user device, a relative time difference of a main subdistrict and a subdistrict adjacent to the main subdistrict and the measured round-trip time between the main subdistrict and the user device; according to the formula that the measured round-trip time minus the receiving and transmitting time difference of the user device is the actual round-trip time, the distance from the main subdistrict to the user device is calculated and a circle taking the center of the main subdistrict as the center is obtained; the base station controller obtains a measured transmission time sum by which information transmitted from the main subdistrict reaches the adjacent subdistrict via the user device; according to the formula that the measured transmission time sum minus the receiving and transmitting time difference of the user device plus the relative time difference is the actual transmission time sum, the distance by which the main subdistrict reaches the adjacent subdistrict via a base station is calculated and an ellipse taking the centers of the main subdistrict and the adjacent subdistrict as focuses is obtained; the user device is positioned according to the intersection points of the ellipse and the circle.
Description
Technical field
The present invention relates to a kind of localization method in cell mobile communication systems to subscriber equipment.
Background technology
User facility positioning method in cell mobile communication systems is described according to prior art below with reference to Fig. 1 and 2.3GPP (3G (Third Generation) Moblie partner plan) main honeycomb locating method at present is OTDOA+RTT (Observed Time Difference Of Arrival+Round Trip Time, observation arrives time difference+two-way time) method: dominant base measured by subscriber equipment and the adjacent base station adjacent with dominant base send information to the time difference (OTDOA) that reaches this subscriber equipment, thereby draw the range difference of two base stations to it, because the location aware of two base stations, just can obtain with these two base stations is a hyperbola of focus, as shown in Figure 1.Utilize two pairs or more base station just can obtain two or more hyperbola.In addition, utilize the main plot (because a dominant base can have a plurality of sub-districts, and what relate at this is main plot with respect to this subscriber equipment) subscriber equipment that records is to its two-way time (RTT), thereby drawing the distance between subscriber equipment and the main plot, is a circle in the center of circle thereby draw with the center, main plot.By means of two or more hyperbola and the intersection point that circle obtains, the position that just can draw subscriber equipment.
Fig. 2 is illustrated in subscriber equipment location signaling flow process in the 3GPP agreement.Because regularly life period is poor for the reception of subscriber equipment and transmission, and the transmission between the base station regularly also life period is poor, therefore to draw the two-way time that subscriber equipment is arrived to the real time difference and the main plot of subscriber equipment in two base stations, also need obtain two other parameter, promptly, relative time error (RTD) (that is, reference clock is poor) between subscriber equipment transmission-time of reception poor (UE Rx-Tx timing Difference) and base station.Calculate above-mentioned actual range difference and actual range by following formula:
Real time is poor=OTDOA-RTD (1)
Actual two-way time=RTT-UE Rx-Tx timing Difference (2)
Can be clear that from Fig. 2, according to prior art, the signaling process of subscriber equipment location in cellular system: at first, core net is sent Location Request to base station controller, and base station controller sends the OTDOA request of measuring and UE Rx-Tx timing Difference to subscriber equipment and measures request and send RTD to Location Measurement Unit (LMU) and measure and ask then.Then, subscriber equipment is measured OTDOA and UE Rx-Tx timing Difference parameter and is sent to base station controller and LMU records RTD and the RTD measurement result is sent to base station controller.Subsequently, base station controller sends the RTT request of measuring to the main plot, so the main plot responds this request measure R TT parameter, and the RTT of mensuration is sent to base station controller.At last, base station controller calculates by above-mentioned two formula, thus the exact position that draws subscriber equipment, and report core net.
From top description to prior art as seen, subscriber equipment will be undertaken measurement parameter UE Rx-Tx timing Difference and OTDOA in whole position fixing process.Therefore, two measurement mechanisms to be installed and be used for measuring respectively above-mentioned two parameters in subscriber equipment.Like this, increase the manufacturing cost and the power consumption of subscriber equipment greatly, and made the volume of subscriber equipment very much not be easy to carry.And in the location of cellular system, if it is the information that obtains is many more, accurately just high more to the location of subscriber equipment so.And it is not high enough only to measure precision from the information of circle and hyperbola acquisition.
Summary of the invention
The problem to be solved in the present invention provide a kind of in cell mobile communication systems the method for locating user devices, wherein subscriber equipment need not to install be used to measure dominant base and adjacent base station transmit a signal to reach subscriber equipment the time of advent difference device, thereby reduce volume, power consumption and the manufacturing cost of subscriber equipment.
Another problem that the present invention will solve provides a kind of volume and manufacturing cost that can reduce subscriber equipment can obtain a plurality of metrical informations again to improve the user facility positioning method of positioning accuracy.
The problem that the present invention also will solve is under the situation of the internal structure that does not change subscriber equipment, can obtain more metrical informations to improve the user facility positioning method of positioning accuracy.
Deal with problems according to one of the present invention, provide a kind of in cell mobile communication systems the method for locating user devices, comprise the following steps: that a. base station controller obtains to record subscriber equipment transmitting-receiving time difference, main plot respectively and the relative time difference of the minizone that is adjacent and described main plot and described subscriber equipment between record two-way time; B. according to formula: calculate the distance of main plot actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, be the center of circle and be the circle of radius with described distance thereby draw with the center, main plot to subscriber equipment; It is characterized in that, also comprise: the described subscriber equipment of information via that the described base station controller of c. obtains to send from the main plot arrive described neighbor cell record the transmission time and; D. according to formula: the actual transmissions time and=record the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by subscriber equipment to the distance of neighbor cell and, thereby according to described distance with to draw with main plot and neighbor cell center be the ellipse of focus; With the intersection point of e., locate described subscriber equipment according to described ellipse and circle.
Deal with problems according to of the present invention another, described localization method comprises the following steps: that also f. is according to formula: the real time is poor=measure the transmission time and-to record two-way time+relative time poor, it is poor from the actual range of main plot and neighbor cell to calculate subscriber equipment, and to obtain with main plot and neighbor cell center be the hyperbola of focus; With the intersection point of g. according to hyperbola and ellipse and circle, locating user devices.
A problem that also will solve according to the present invention, provide a kind of in cell mobile communication systems the method for locating user devices, comprise the following steps: that a. base station controller obtains to record dominant base respectively and the base station that is adjacent transmits a signal to recording two-way time between the relative time difference of the minizone that records poor, subscriber equipment transmitting-receiving time difference time of advent, main plot and be adjacent that reaches subscriber equipment and described main plot and the described subscriber equipment respectively; B. according to formula: calculating the distance of main plot to subscriber equipment actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, is the circle in the center of circle thereby draw with the center, main plot; C. according to formula: the actual time of arrival is poor=record the time of advent poor-relative time is poor, calculates described dominant base and the adjacent base station range difference from described subscriber equipment, is the hyperbola of focus thereby draw with described dominant base and described adjacent base station; It is characterized in that, the described subscriber equipment of information via that the described base station controller of d. obtains to send from the main plot arrive described neighbor cell record the transmission time and; E. according to formula: the actual transmissions time and=record the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by the base station to the distance of neighbor cell and, be the ellipse of focus thereby draw with main plot and neighbor cell center; With the intersection point of f., locate described subscriber equipment according to described hyperbola, ellipse and circle.
Equally, a problem that also will solve according to the present invention, provide a kind of in cell mobile communication systems the method for locating user devices, comprise the following steps: that a. base station controller obtains to record dominant base respectively and the base station that is adjacent transmits a signal to recording two-way time between the relative time difference of the minizone that records poor, subscriber equipment transmitting-receiving time difference time of advent, main plot and be adjacent that reaches subscriber equipment and described main plot and the described subscriber equipment respectively; B. according to formula: calculating the distance of main plot to subscriber equipment actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, is the circle in the center of circle thereby draw with the center, main plot; C. according to formula: the actual time of arrival is poor=record the time of advent poor-relative time is poor, calculates described dominant base and the adjacent base station range difference from described subscriber equipment, is the hyperbola of focus thereby draw with described dominant base and described adjacent base station; It is characterized in that the described base station controller of d. need to judge whether further metrical information; E. if, then (1) described base station controller described subscriber equipment of information via of obtaining to send from the main plot arrive described neighbor cell record the transmission time and; (2) according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by the base station to the distance of neighbor cell and, be the ellipse of focus thereby draw with main plot and neighbor cell center; (3) according to the intersection point of described hyperbola, ellipse and circle, locate described subscriber equipment; With if not, then according to described hyperbola and the circle intersection point, locate described subscriber equipment.
Since a kind of localization method of the present invention be by neighbor cell measurement from the main plot by subscriber equipment arrive it time and, by formula operation draw dexterously the main plot by subscriber equipment arrive this neighbor cell distance and and main plot and neighbor cell from the range difference of subscriber equipment, thereby can obtain the locating information of subscriber equipment, so compared with prior art, subscriber equipment inside need not to install and measure the device of the difference time of advent, reduce the volume and the manufacturing cost of subscriber equipment, and, make that the location is more accurate by obtaining locating information oval and hyperbola and circle.
In addition, another kind of localization method of the present invention be add on the basis of existing technology measure the main plot through subscriber equipment to the distance of neighbor cell and, thereby obtain oval locating information, thereby compared with prior art, improved positioning accuracy.
Description of drawings
Fig. 1 is according to prior art, carries out subscriber equipment Positioning Principle figure in cell mobile communication systems;
Fig. 2 is according to the principle among Fig. 1, the signaling process figure in position fixing process;
Fig. 3 is the signaling process figure according to the first embodiment of the present invention;
Fig. 4 is the schematic diagram calculation according to the first embodiment of the present invention;
Fig. 5 is according to oval positioning mode schematic diagram of the present invention; With
Fig. 6 is the method step flow chart according to the first embodiment of the present invention;
Fig. 7 is signaling process figure according to a second embodiment of the present invention;
Fig. 8 is a method step flow chart according to a second embodiment of the present invention;
Fig. 9 is according to the present invention, based on the oval positioning mode schematic diagram of the different districts of dominant base.
Embodiment
By following description to preferred embodiment of the present invention, feature of the present invention, above-mentioned and other advantages will be apparent.Then, according to Fig. 3-6 first preferred embodiment of the present invention is described.Wherein, Fig. 3 is the signaling process figure according to the first embodiment of the present invention.Fig. 4 is the schematic diagram calculation according to the first embodiment of the present invention.Fig. 5 is according to oval positioning mode schematic diagram of the present invention.Fig. 6 is the method step flow chart according to the first embodiment of the present invention.
As shown in Figure 3, base station controller sends subscriber equipment transmitting-receiving time difference (UERx-Tx timing Difference) measurement, relative time poor (RTD) and measures request two-way time (RTT) to the main plot at subscriber equipment and Location Measurement Unit (LMU) and this subscriber equipment place respectively in response to the Location Request of core net.Wherein, UE Rx-Tx timing Difference represent the reception of subscriber equipment and send between time difference, RTD represent that the signal that reference time difference between main plot and the sub-district adjacent with this main plot and RTT represent the main plot turns back to the required time of main plot through subscriber equipment.Subsequently, subscriber equipment and LMU measure UE Rx-Tx timing Difference and RTD respectively and measurement result are reported base station controller.Then, base station controller sends transmission time and (TSOT) measurement request to neighbor cell.Neighbor cell is measured TSOT and measurement result is reported base station controller in response to this request.Yet because the reception of subscriber equipment and to send life period poor, and the reference clock of main plot and neighbor cell also has the time difference, so TSOT that records and RTT can not represent real transmission time and and real two-way time.Therefore, in the prior art, according to formula actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, calculating the actual range of main plot and base station, is the circle in the center of circle thereby draw with the center, main plot.
And in the present invention, according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by subscriber equipment arrive neighbor cell actual range and, be the ellipse of focus thereby draw with main plot and neighbor cell center.Because, according to geometric knowledge, between 2 positions and these 2 and the 3rd apart from sum, can draw with these 2 is the ellipse of focus.Therefore, after drawing circle and ellipse, draw the positional information of subscriber equipment by their intersection point, and have base station controller to report core net.
Below, with reference to Fig. 4, describe in detail the present invention calculate the actual transmissions time and the derivation of formula.Wherein, frame emission starting point regularly in main plot (CELL 1) is represented the reference clock of CELL 1, and neighbor cell (CELL 2) frame emission starting point is regularly represented the reference clock of CELL 2.CELL 1 sends a signal to subscriber equipment (UE) along down link, and begins down link CELL 1 frame emission simultaneously regularly.This signal begins down link UE received frame regularly simultaneously through arriving UE the path delay of time 1.UE transmits respectively to CELL 1 and CELL 2 along up link, and begins up link UE frame emission simultaneously regularly.Signal process arrival CELL 1 in the path delay of time 1, and begin the received frame timing of up link CELL 1 simultaneously.Equally, signal process arrival up link CELL 2 in the path delays of time 2, and begin the received frame timing of up link CELL 2 simultaneously.
From Fig. 4 as seen, because the reference time life period between CELL 1 and the CELL 2 is poor (promptly, the frame emission of down link CELL 1 among Fig. 4 regularly and the time difference of the frame emission of down link CELL2 between regularly), so the time difference between the two be the relative time difference RTD that LMU will measure.Be the actual signal transmission time between CELL 1 and the UE path delay of time 1 among Fig. 4, and be the path delay of time 2 in the actual signal transmission time between CELL 2 and the UE.And among the figure down link UE received frame regularly and the difference expression subscriber equipment of up link UE frame emission between regularly receive and send the time difference (UERx-Tx timing Difference).Because down link CELL 2 frame emissions starting point is regularly represented the reference clock of CELL 2, thus it with the time difference of up link CELL 2 received frames between regularly promptly represent the measured signal of CELL2 from CELL 1 downlink to UE and sent along up link by UE transmission time of arriving CELL2 with (TSOT).Obviously, this TSOT and be not equal to the actual transmission time and.We are easy to draw following formula from Fig. 4:
Real time and=path delay of time 1+ 2=TSOT+RTD-UE in path delay of time Rx-Tx timingdifference.(3)
According to the UE Rx-Tx timingdifferenc, the TSOT that record by subscriber equipment, neighbor cell and LMU respectively and RTD just can draw the main plot send signal through subscriber equipment arrive neighbor cell time and, be the ellipse of focus thereby just can draw with main plot and neighbor cell center according to geometric knowledge.As shown in Figure 5.
Get back to Fig. 4, we can also draw the actual two-way time between main plot and subscriber equipment, and are specific as follows.Be that CELL 1 transmission signal turns back to CELL 1 through subscriber equipment the two-way time that the main plot records (RTT), that is, and and the starting point from down link CELL 1 frame emission starting point regularly to the timing of up link CELL 1 received frame.And should be 1+ path delay of time 1 in the path delay of time actual two-way time, thus draw formula:
Actual two-way time=RTT-UE Rx-Tx timing difference (4)
Like this, calculate the actual range between main plot and the subscriber equipment, thereby the center that can draw with the main plot has been the circle in the center of circle.Utilize intersection point oval and circle, just can draw the correct locating information of subscriber equipment.Certainly, can utilize localization method of the present invention calculate between main plot and a plurality of neighbor cell actual range and, thereby draw a plurality of ellipses, can improve computational accuracy like this.
If system is very high to the positioning accuracy request of subscriber equipment, also need further locating information, can calculate subscriber equipment so according to the present invention dexterously and send information to time difference between main plot and the neighbor cell respectively.Get back to Fig. 4, according to formula:
Real time is poor=path delay of time 2-1=TSOT-RTT+RTD in the path delay of time, (5)
Calculating the range difference of main plot and neighbor cell and subscriber equipment, is the hyperbola of focus and draw with main plot and neighbor cell center.Can accurately draw the locating information of subscriber equipment according to the intersection point of hyperbola, ellipse and circle.
Fig. 6 shows the flow chart of steps according to first preferred embodiment of the present invention.At first, positional parameter such as subscriber equipment, main plot and neighbor cell measurement UE Rx-Tx timing difference, RTT and RTD and report base station controller (S61).In step S62, base station controller request neighbor cell measurement TSOT.Base station controller also sends to above-mentioned neighbor cell (S63) with the identification information of subscriber equipment.This identification information comprises scrambler number, so that neighbor cell can be discerned the information from subscriber equipment to be positioned.In step S64, neighbor cell measurement TSOT also reports base station controller in step S65.In step S66, according to the positional parameter that records calculate the actual transmissions time and and actual two-way time, thereby draw ellipse and circle, if necessary, also can calculate hyperbola with locating user devices.It should be noted that, measuring the step of UE Rx-Tx timing Difference, RTT and RTD and measurement TSOT can exchange, the present invention does not emphasize the sequencing (that is, the order between step S61 and the step S62-S65 can be exchanged) between them.
From the first embodiment of the present invention as seen, the present invention unlike the prior art be to need not subscriber equipment and measure time difference that main plot and neighbor cell transmit a signal to subscriber equipment and calculate them and come locating user devices with the hyperbola that draws from the range difference of subscriber equipment.But by the neighbor cell measurement main plot send the information via subscriber equipment arrive neighbor cell transmission time and, calculate between them distance and, come locating user devices thereby draw ellipse.Like this, just need not in subscriber equipment, to install and measure the time difference device, thereby reduced the volume and the manufacturing cost of subscriber equipment.If also need further locating information, also can be by known parameter, obtain range difference between main plot and neighbor cell and the subscriber equipment dexterously by formula, thereby draw hyperbola.As seen, still need not subscriber equipment by method of the present invention and install and measure device and can draw hyperbola, and oval, circle adds hyp locating information and more improved positioning accuracy.
Below, with reference to Fig. 7 and 8 second preferred embodiment of the present invention is described.In second preferred embodiment of the present invention, compared with prior art, do not change user device architecture, that is, subscriber equipment is still measured main plot and neighbor cell and is sent information to its time difference.But second preferred embodiment of the present invention increased obtain the main plot through subscriber equipment arrive neighbor cell distance and, thereby draw oval locating information.Also can be poor by the real time that records as formula (5), OTDOA is revised.Increase locating information like this, thereby improved positioning accuracy.
Fig. 7 is signaling process figure according to a second embodiment of the present invention.Fig. 8 is a method step flow chart according to a second embodiment of the present invention.From Fig. 7 as seen, compared with prior art, the second embodiment of the present invention has increased the request of base station controller request neighbor cell measurement TSOT.Neighbor cell is measured TSOT and is reported base station controller in response to this request.Thereby obtain oval locating information.
With reference to Fig. 8, at first, measure positional parameters (S81) such as OTDOA, RTT, RTD and UE Rx-Tx timing Difference.Then, need to judge whether further metrical information (S82).If, neighbor cell measurement TSOT in step S83-S86 so, and report base station controller, its concrete steps are described identical with first embodiment, do not repeat them here.Calculate oval, hyperbola and round then to determine the position (S87) of subscriber equipment.If the judged result in step S82 is not need further metrical information, so directly enter step S87.
As seen, by the second embodiment of the present invention, strengthened locating accuracy.Certainly,, can omit the determining step S82 among Fig. 8 so, and measure the isoparametric step of OTDOA, RTT and do not have strict sequencing requirement with the step of measuring TSOT if system is very high to positioning requirements.
Fig. 9 is according to the present invention, based on the oval positioning mode schematic diagram of the different districts of dominant base.It shows oval a kind of special circumstances, and promptly main plot and the neighbor cell center thereof with dominant base is the ellipse of focus.
More than be the description to preferred embodiment of the present invention, those skilled in the art that should be understood that according to design of the present invention and principle, and the various variations of embodiment are all dropped in the scope of the present invention that is limited by appended claims.
Claims (14)
1. the method for a locating user devices in cell mobile communication systems comprises the following steps:
A. base station controller obtain to record subscriber equipment transmitting-receiving time difference, main plot respectively and the relative time difference of the minizone that is adjacent and described main plot and described subscriber equipment between record two-way time;
B. according to formula: calculate the distance of main plot actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, be the center of circle and be the circle of radius with described distance thereby draw with the center, main plot to subscriber equipment;
It is characterized in that, also comprise step:
C. the described subscriber equipment of information via that described base station controller obtains to send from the main plot arrive described neighbor cell record the transmission time and;
D. according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by subscriber equipment to the distance of neighbor cell and, thereby according to described distance with to draw with main plot and neighbor cell center be the ellipse of focus;
E. according to the intersection point of described ellipse and circle, locate described subscriber equipment; With
F. by calculate described main plot through described subscriber equipment to a plurality of distances of a plurality of described neighbor cells and, obtaining with main plot and a plurality of neighbor cell is a plurality of ellipses of focus.
2. the method for a locating user devices in cell mobile communication systems comprises the following steps:
A. base station controller obtain to record subscriber equipment transmitting-receiving time difference, main plot respectively and the relative time difference of the minizone that is adjacent and described main plot and described subscriber equipment between record two-way time;
B. according to formula: calculate the distance of main plot actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, be the center of circle and be the circle of radius with described distance thereby draw with the center, main plot to subscriber equipment;
It is characterized in that, also comprise step:
C. the described subscriber equipment of information via that described base station controller obtains to send from the main plot arrive described neighbor cell record the transmission time and;
D. according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by subscriber equipment to the distance of neighbor cell and, thereby according to described distance with to draw with main plot and neighbor cell center be the ellipse of focus;
E. according to the intersection point of described ellipse and circle, locate described subscriber equipment;
F. according to formula: the real time is poor=measure the transmission time and-to record two-way time+relative time poor, calculation base station is poor from the actual range of main plot and neighbor cell, and to obtain with main plot and neighbor cell center be the hyperbola of focus; With
G. according to hyperbola and intersection point oval and circle, locating user devices.
3. localization method as claimed in claim 2, it is characterized in that, also comprising can be by calculating described main plot and a plurality of neighbor cell to described subscriber equipment to a plurality of range differences, and obtaining with main plot and a plurality of neighbor cell is many hyp steps of focus.
4. as the described localization method of arbitrary claim among the claim 1-3, it is characterized in that described step a comprises:
Described base station controller sends the request of measurement to described subscriber equipment, Location Measurement Unit and main plot respectively;
Described subscriber equipment, main plot and Location Measurement Unit are measured described subscriber equipment respectively and are received and dispatched time difference, described relative time difference and described two-way time; With
Described subscriber equipment, main plot and described Location Measurement Unit report measurement result described base station controller respectively.
5. as the described localization method of arbitrary claim among the claim 1-3, it is characterized in that described step c comprises:
Described base station controller sends the request of measuring and the identification information of described subscriber equipment is sent to described neighbor cell to described neighbor cell;
The described subscriber equipment of information via that the described main plot of described neighbor cell measurement sends arrives recording the transmission time and and reporting described base station controller of described neighbor cell.
6. localization method as claimed in claim 5 is characterized in that, described identification information comprises scrambler number.
7. the method for a locating user devices in cell mobile communication systems comprises the following steps:
A. base station controller obtains to record dominant base respectively and the base station that is adjacent transmits a signal to recording two-way time between the relative time difference of the minizone that records poor, subscriber equipment transmitting-receiving time difference time of advent, main plot and be adjacent that reaches subscriber equipment and described main plot and the described subscriber equipment respectively;
B. according to formula: calculating the distance of main plot to subscriber equipment actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, is the circle in the center of circle thereby draw with the center, main plot;
C. according to formula: the actual time of arrival is poor=record the time of advent poor-relative time is poor, calculates described dominant base and the adjacent base station range difference from described subscriber equipment, is the hyperbola of focus thereby draw with described dominant base and described adjacent base station;
It is characterized in that,
D. the described subscriber equipment of information via that described base station controller obtains to send from the main plot arrive described neighbor cell record the transmission time and;
E. according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by the base station to the distance of neighbor cell and, be the ellipse of focus thereby draw with main plot and neighbor cell center; With
F. according to the intersection point of described hyperbola, ellipse and circle, locate described subscriber equipment.
8. the method for a locating user devices in cell mobile communication systems comprises the following steps:
A. base station controller obtains to record dominant base respectively and the base station that is adjacent transmits a signal to recording two-way time between the relative time difference of the minizone that records poor, subscriber equipment transmitting-receiving time difference time of advent, main plot and be adjacent that reaches subscriber equipment and described main plot and the described subscriber equipment respectively;
B. according to formula: calculating the distance of main plot to subscriber equipment actual two-way time=record two-way time-subscriber equipment transmitting-receiving time difference, is the circle in the center of circle thereby draw with the center, main plot;
C. according to formula: the actual time of arrival is poor=record the time of advent poor-relative time is poor, calculates described dominant base and the adjacent base station range difference from described subscriber equipment, is the hyperbola of focus thereby draw with described dominant base and described adjacent base station;
It is characterized in that,
D. described base station controller need to judge whether further metrical information;
E. if, then (1) described base station controller described subscriber equipment of information via of obtaining to send from the main plot arrive described neighbor cell record the transmission time and; (2) according to formula: the actual transmissions time and=measure the transmission time and-subscriber equipment transmitting-receiving time difference+relative time is poor, calculate the main plot by the base station to the distance of neighbor cell and, be the ellipse of focus thereby draw with main plot and neighbor cell center; (3) according to the intersection point of described hyperbola, ellipse and circle, locate described subscriber equipment; With
If not, then, locate described subscriber equipment according to the intersection point of described hyperbola and circle.
9. as claim 7 or 8 described localization methods, it is characterized in that, also comprising can be by calculating described dominant base and a plurality of adjacent base station to described subscriber equipment to a plurality of range differences, and obtaining with dominant base and a plurality of adjacent base station is many hyp steps of focus.
10. localization method as claimed in claim 9, it is characterized in that, also comprise can by calculate described main plot through described subscriber equipment to a plurality of distances of a plurality of described neighbor cells and, obtaining with main plot and a plurality of neighbor cell is the step of a plurality of ellipses of focus.
11. as claim 7 or 8 described localization methods, it is characterized in that, also comprise can by calculate described main plot through described subscriber equipment to a plurality of distances of a plurality of described neighbor cells and, obtaining with main plot and a plurality of neighbor cell is the step of a plurality of ellipses of focus.
12., it is characterized in that described step a comprises as claim 7 or 8 described localization methods:
Described base station controller sends the request of measurement to described subscriber equipment, Location Measurement Unit and main plot respectively;
Described subscriber equipment, main plot and Location Measurement Unit are measured the described time of advent respectively, described subscriber equipment is received and dispatched time difference, described relative time difference and two-way time; With
Described subscriber equipment, main plot and described Location Measurement Unit report measurement result described base station controller respectively.
13., it is characterized in that described base station controller obtains to record the transmission time and comprise as claim 7 or 8 described localization methods:
Described base station controller sends the request of measuring and the identification information of described subscriber equipment is sent to described neighbor cell to described neighbor cell;
The described subscriber equipment of information via that the described main plot of described neighbor cell measurement sends arrives recording the transmission time and and reporting described base station controller of described neighbor cell.
14. localization method as claimed in claim 13 is characterized in that, described identification information comprises scrambler number.
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| CNB011262737A CN1154380C (en) | 2001-07-18 | 2001-07-18 | Method for locating user devices in cellular mobile communication system |
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| CNB011262737A CN1154380C (en) | 2001-07-18 | 2001-07-18 | Method for locating user devices in cellular mobile communication system |
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|---|---|---|---|---|
| CN100446616C (en) * | 2005-01-11 | 2008-12-24 | 华为技术有限公司 | Cell ID based enhanced positioning method |
| CN100420338C (en) * | 2006-01-10 | 2008-09-17 | 华为技术有限公司 | Mobile station positioning method |
| CN101047491B (en) * | 2006-06-06 | 2010-05-12 | 华为技术有限公司 | Communication process system and its method, and time measuring device between network element |
| CN103442434B (en) * | 2013-08-20 | 2016-03-02 | 京信通信系统（中国）有限公司 | A kind of personnel positioning method, Apparatus and system be applied in tunnel environment |
| CN107219522B (en) * | 2017-05-08 | 2020-01-21 | 电子科技大学 | Ellipse-hyperbola combined through-wall radar target positioning method |
| CN109525931B (en) * | 2017-09-18 | 2021-10-29 | 中兴通讯股份有限公司 | Method, device, equipment and storage medium for positioning wireless equipment |
| CN110730413A (en) * | 2018-06-29 | 2020-01-24 | 阿里巴巴集团控股有限公司 | Terminal positioning method and device |
| CN108896959A (en) * | 2018-08-02 | 2018-11-27 | 南京理工大学 | A kind of mobile communication positioning method based on time of arrival (toa) |
| BR112021016036A2 (en) * | 2019-02-15 | 2021-10-05 | Nokia Technologies Oy | MULTI-CELL POSITIONING |
-
2001
- 2001-07-18 CN CNB011262737A patent/CN1154380C/en not_active Expired - Fee Related
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| CN1398129A (en) | 2003-02-19 |
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