CN101360322B - Wireless location system and method based on measurement network - Google Patents
Wireless location system and method based on measurement network Download PDFInfo
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- CN101360322B CN101360322B CN2007100443279A CN200710044327A CN101360322B CN 101360322 B CN101360322 B CN 101360322B CN 2007100443279 A CN2007100443279 A CN 2007100443279A CN 200710044327 A CN200710044327 A CN 200710044327A CN 101360322 B CN101360322 B CN 101360322B
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Abstract
The invention discloses a wireless positioning method and the system thereof based on a measuring network, which reduces the error of mobile phone positioning. The technical proposal is that the invention uses positioning measuring network to estimate user position correctly. The invention utilizes the position characteristic of a measuring unit to avoid the effect of indirect route to the position measuring, and also utilizes a virtual base station technology to obtain time and frequency synchronization between the measuring units, thereby further reduces the positioning estimating error. The invention is applied to the mobile phone positioning field.
Description
Technical field
The present invention relates to a kind of wireless location system and method, relate in particular to a kind of method and apparatus that utilizes the different measuring cell signal to position the time of advent.
Background technology
Along with the development of wireless communication technique, particularly the U.S. proposes after the emergency position service request, and the wireless location service more and more is subjected to industry and pays close attention to.
According to whether needing the participation of mobile phone to classify, mainly be divided into two types for the location technology of collecting: the mobile phone location technology that needs the mobile phone location technology of mobile phone reporting information and do not need the mobile phone reporting information.The former, network system need be passed through the signaling mobile phone, and needs mobile phone initiatively to report relevant metrical information just can determine the particular location of mobile phone.So; mobile phone is full of ideas to be separated it and is in the state of being positioned, and mobile phone also can need stop under the prerequisite that is positioned the user; by not reporting relevant metrical information and reporting the method for false metrical information, make the privacy of positional information of oneself be protected.For the latter, owing to do not need the active of mobile phone to participate in, mobile phone can't determine whether it is in the state that is positioned, and this protection for mobile phone location has caused certain difficulty.A typical case of these class methods just is based on the localization method of cell id.
According to location reference signals classification, mainly be divided into three types: based on the location of mobile phone cell id, based on the location of measurement point signal/mobile phone signal and based on the location of satellite navigation system for the location technology of mobile phone.Wherein, localization method precision based on the mobile phone cell id is relatively poor, need extra equipment and cost based on the localization method of satellite navigation system, do not need substantially to add extras and have medium positioning accuracy based on the localization method of measurement point signal/mobile phone signal.
Traditional localization method based on measurement point signal/mobile phone signal as shown in Figure 1, system has three measurement points 111～113 and the mobile phone 12 with measurement capability at least, the signal 131～133 that has radio transmission between measurement point 111～113 and the mobile phone 12, the signal propagation time that correspondence measures are t1～t3.Because the radio velocity of wave propagation is constant light velocity c, thus mobile phone and the distance of corresponding measurement point be di=ti * c (i=1,2 ...).With corresponding measurement point is that the center of circle, di are that radius is drawn circle 141～143, and then the position of intersecting point of all circles that obtain is the mobile phone correspondence position.Mobile phone reports the emission-receive time delay of the measurement point signal of its measurement to give network system, and then network just can calculate the position of mobile phone according to these values.
In real system and since have building etc. between mobile phone and the measurement point stop that the possibility of physical presence direct path is very little.Fig. 2 shows this typical situation, between measurement point 21 and the mobile phone 22 because the stopping of building 23, so there is not desirable direct path 24.Simultaneously, because for the reflection of measurement point signal, there is the path 26 of signal transmission in another building 25 between measurement point and the mobile phone.Because the principle on " triangle both sides sum is greater than the 3rd limit " in how much, so the corresponding radius of a circle that obtains according to measured value at this moment can cause the inaccurate of location estimation greater than actual value.
The localization method of eating dishes without rice or wine to monitor, measure is a kind of relatively mode of safety for positioning equipment, because this mode is not easy to be discovered.Simultaneously, the localization method of eating dishes without rice or wine to monitor, measure must be understood user's Position Approximate, the signal that its scope should make effectively demodulation of positioning equipment/measurement mobile phone and corresponding with service measurement point thereof be launched at least.Suppose that it is reasonably that this equipment is understood the Serving cell of mobile phone, consider equipment cost, mobility and disguise, eat dishes without rice or wine monitoring, the measurement type positioning equipment illegal based on the unlikely quilt of the method for direction of arrival of signal angle and Measurement Network adopt.So generally this kind equipment can adopt the locate mode based on time of arrival (toa).
Summary of the invention
The object of the present invention is to provide a kind of wireless location method and system based on Measurement Network, utilize the location survey network accurately to carry out the measurement of customer location, utilize the position characteristics of measuring unit can avoid the image of non-direct reach path for position measurement, utilize the virtual base station technology can obtain time between the measuring unit and frequency synchronously, further reduce the error of location estimation.
Technical scheme of the present invention is: the present invention proposes a kind of wireless location method based on Measurement Network, treat locating cellphone and carry out location estimation, this method comprises:
Main measurement and control unit and a plurality of subsidiaries unit start and set up this main measurement and control unit is connected with communication link between this subsidiary unit;
This main measurement and control unit are according to a sub-district of mobile phone access procedure access wireless telecommunication system, and this master's measurement and control unit obtain the time and the Frequency Synchronization of this wireless telecommunication system;
This master's measurement and control unit are controlled those subsidiary unit and are inserted this wireless telecommunication system sub-district, obtain the time and the Frequency Synchronization of this wireless telecommunication system;
This main measurement and control unit and those subsidiary unit carry out GPS and receive to obtain cell position;
Those subsidiary unit report this master's measurement and control unit with the cell position of self;
This master measures and control unit is monitored this wireless telecommunication system sub-district, obtains the space interface signaling of this mobile phone to be positioned, obtains the information of radio resource allocation of this mobile phone to be positioned;
This master measures and control unit issues the information of radio resource allocation of this mobile phone to be positioned to those subsidiary unit;
This main measurement and control unit and those subsidiary unit are according to the information of radio resource allocation of this mobile phone to be positioned that distributes, measure the time difference of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned, wherein the measured value of this master's measurement and control unit is t0, the measured value of those subsidiary unit is ti, and i is a natural number;
Time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of the mobile phone upward signal time of advent to be positioned that this master measures and control unit calculates those subsidiary unit and this master measurement and control unit;
This master measure and control unit according to the cell position of self, cell position that those subsidiary unit report and the difference dti time of advent of this mobile phone upward signal, estimate the position of this mobile phone to be positioned;
This master measures and control unit reports the position of this mobile phone to be positioned to give the user.
The above-mentioned wireless location method based on Measurement Network wherein, also comprises after the information of radio resource allocation that this master measures and control unit issues this mobile phone to be positioned is given the step of those subsidiary unit:
This master measures and control unit is handed down to those subsidiary unit with initial Measuring Time and measurement gap periods.
The above-mentioned wireless location method based on Measurement Network, wherein, this initial Measuring Time is a wireless system frame number of setting.
The above-mentioned wireless location method based on Measurement Network, wherein, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
The above-mentioned wireless location method based on Measurement Network, wherein, this measurement gap periods is the integral multiple of wireless system frame.
The above-mentioned wireless location method based on Measurement Network, wherein, this initial Measuring Time is a GPS standard time of setting.
The above-mentioned wireless location method based on Measurement Network, wherein, when the position of those subsidiary unit changed, this method also comprised, the position updating value of the subsidiary unit that measures reported this master measure and control unit.
Above-mentioned wireless location method based on Measurement Network, wherein, those subsidiary unit self cell position is reported this master measures and the step of control unit after also comprise:
This master's measurement and control unit are in the GPS local time of carrying out obtaining when GPS receives this measurement and control unit;
Those subsidiary unit are in the GPS local time of carrying out obtaining when GPS receives self;
This master measures and control unit control selects a wireless system frame number of this wireless telecommunication system sub-district to notify those subsidiary unit;
Those subsidiary unit when reporting cell position with this wireless telecommunication system sub-district relatively the time difference Ti of the GPS local time of self report this master measurement and control unit, i is a natural number;
This master's measurement and control unit are measured this wireless telecommunication system sub-district, and the time difference of the GPS local time of self is T0 relatively;
This master measures and difference dTi=Ti-T0 of the time difference of the GPS local time of control unit relative this master's measurement with this wireless telecommunication system sub-district of time difference of the GPS local time of each subsidiary unit relatively of calculating this wireless telecommunication system sub-district and control unit;
After the step of time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of this master measures and control unit calculates those subsidiary unit mobile phone upward signal time of advent to be positioned and this master measurement and control unit, also comprise: this time difference dti is deducted this difference dTi.
The above-mentioned wireless location method based on Measurement Network, wherein, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
Above-mentioned wireless location method based on Measurement Network, wherein, when the position of those subsidiary unit changes, this method also comprises, the position updating value of the subsidiary unit that measures is reported this master measures and control unit, remeasure this wireless telecommunication system sub-district simultaneously relatively the GPS local time of self time difference Ti and report this master measurement and control unit.
Based on above-mentioned method, the invention allows for a kind of wireless location system based on Measurement Network, treat locating cellphone and carry out location estimation, this system comprises main measurement and control unit and a plurality of subsidiaries unit,
Wherein this master's measurement and control unit comprise:
The one GPS receiver receives gps satellite signal, finishes the position measurement to self;
Wireless telecommunication system signaling parsing module is resolved the allocation of radio resources signaling of this mobile phone to be positioned, obtains the information of radio resource allocation of this mobile phone to be positioned;
The first wireless telecommunication system receiver, insert a sub-district of wireless telecommunication system, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously, the allocation of radio resources signaling of this mobile phone to be positioned of monitoring the space interface signaling of this wireless telecommunication system simultaneously and will listening to exports this wireless telecommunication system signaling parsing module to, and the while is measured this mobile phone upward signal to be positioned time difference t0 of this wireless telecommunication system cell downlink signal relatively according to the information of radio resource allocation of this mobile phone to be positioned of this wireless telecommunication system signaling parsing module output;
First communication module sends the information of radio resource allocation of this mobile phone to be positioned of this wireless telecommunication system signaling parsing module output;
The time difference computing module, according to this mobile phone upward signal to be positioned of this wireless telecommunication system receiver output time difference ti of relative this wireless telecommunication system cell downlink signal of upward signal of measured this mobile phone to be positioned in those subsidiary unit of the time difference t0 of this wireless telecommunication system cell downlink signal and the output of this first communication module relatively, calculate both time difference dti=ti-t0, wherein i is a natural number;
The mobile phone location estimation module, measure and the cell position of those subsidiary unit of the position of control unit, this first communication module output and time difference dti that should time difference computing module output according to this of GPS receiver output is main, carry out the location estimation of this mobile phone to be positioned and the result of location estimation is reported the user;
Those subsidiary unit comprise:
Second communication module receives the information of radio resource allocation of this mobile phone to be positioned that this first communication module sends;
The 2nd GPS receiver receives gps satellite signal, finishes the position measurement to self, and by this second communication module position measurements is back to this master's measurement and control unit;
The second wireless telecommunication system receiver, insert this wireless telecommunication system sub-district, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously, receive the information of radio resource allocation of this mobile phone to be positioned of the output of this second communication module simultaneously, and the relative time difference ti of this wireless telecommunication system cell downlink signal of the upward signal of measuring this mobile phone to be positioned in view of the above, i is a natural number, and those time differences ti sends it back this master by this second communication module and measures and control unit.
Above-mentioned wireless location system based on Measurement Network, wherein, this master measures and control unit also comprises:
Control module is handed down to those subsidiary unit with initial Measuring Time and measurement gap periods by this first communication module.
The above-mentioned wireless location system based on Measurement Network, wherein, this initial Measuring Time is a wireless system frame number of setting.
The above-mentioned wireless location system based on Measurement Network, wherein, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
The above-mentioned wireless location system based on Measurement Network, wherein, this measurement gap periods is the integral multiple of wireless system frame.
The above-mentioned wireless location system based on Measurement Network, wherein, this initial Measuring Time is a GPS standard time of setting.
The above-mentioned wireless location system based on Measurement Network, wherein, the 2nd GPS receiver remeasures positional value and reports this master by this second communication module and measures and control unit when self-position changes.
Above-mentioned wireless location system based on Measurement Network, wherein,
In those subsidiary unit, the 2nd GPS receiver is finished the measurement to the GPS local time of self when the completing place is measured; This second wireless telecommunication system receiver is also chosen the timing of this wireless telecommunication system sub-district; Those subsidiary unit also comprise the second reference cell time difference calculating unit, this unit receives the measured value of GPS local time and the timing of this wireless telecommunication system sub-district, calculate this wireless telecommunication system sub-district relative time difference Ti of the GPS local time of self, and report this master measurement and control unit by this second communication unit;
In this main measurement and control unit, a GPS receiver is in the measurement of finishing when the completing place is measured the GPS local time of self, and this first wireless telecommunication system receiver is also chosen the timing of this wireless telecommunication system sub-district; This time difference computing module also comprises the first reference cell time difference calculating unit, this unit receives the measured value of GPS local time and the timing of this wireless telecommunication system sub-district, calculate this wireless telecommunication system sub-district time difference T0 of the GPS local time of self relatively; This time difference computing module according to Ti and this first reference cell time difference calculating unit T0 of this first communication module output, upgrades this time difference dti again.
Above-mentioned wireless location system based on Measurement Network, wherein, the timing of selected this wireless telecommunication system sub-district of this first wireless telecommunication system receiver and this second wireless telecommunication system receiver is a wireless system frame number of this wireless telecommunication system sub-district.
The above-mentioned wireless location system based on Measurement Network, wherein, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
The above-mentioned wireless location system based on Measurement Network, wherein, when changing in the position of subsidiary unit, the 2nd GPS receiver in the subsidiary unit is measured self-position and GPS local time again.
The present invention contrasts prior art following beneficial effect: the present invention utilizes the location survey network, accurately carries out the estimation of customer location.The present invention utilizes the position characteristics of measuring unit to avoid the image of non-direct reach path to position measurement, also utilize the virtual base station technology obtain on time between the measuring unit and the frequency synchronously, further reduce the error of location estimation.
Description of drawings
Fig. 1 is the schematic diagram of traditional localization method based on measurement point signal/mobile phone signal.
Fig. 2 is the schematic diagram that has non-direct reach path between mobile phone and the measurement point.
Fig. 3 is the flow chart of first embodiment of the wireless location method based on Measurement Network of the present invention.
Fig. 4 is the schematic diagram of second embodiment of the wireless location system based on Measurement Network of the present invention.
Fig. 5 is the flow chart of the 3rd embodiment of the wireless location method based on Measurement Network of the present invention.
Fig. 6 is the schematic diagram of the 4th embodiment of the wireless location system based on Measurement Network of the present invention.
Fig. 7 is the flow chart of the 5th embodiment of the wireless location method based on Measurement Network of the present invention.
Fig. 8 is the signaling process figure of the 5th embodiment of the wireless location method based on Measurement Network of the present invention.
Fig. 9 is the schematic diagram of the 6th embodiment of the wireless location system based on Measurement Network of the present invention.
Figure 10 is the wireless location schematic diagram based on Measurement Network of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
(first embodiment)
Fig. 3 shows the flow process of first embodiment of the wireless location method based on Measurement Network of the present invention, sees also Fig. 3, is the detailed description to each step in this method flow below.
Step S101: each unit start, set up communication link and connect.Each unit here comprises a main measurement and control unit and a plurality of subsidiaries unit, the connection of setting up communication link between main measurement and control unit and whole subsidiary unit.
Step S102: main measure and control unit inserts a sub-district of wireless telecommunication system according to the mobile phone access procedure, obtain time of this wireless telecommunication system and frequency synchronously.
Step S103: main measure and control unit is controlled whole subsidiaries unit and inserted this wireless telecommunication system sub-district, obtain time of this wireless telecommunication system and frequency synchronously.
Step S104: main measurement and control unit and those subsidiary unit carry out GPS and receive to obtain the positional information of unit self.
Step S105: those subsidiary unit report main the measurement and control unit with the cell position of self.
Step S106: main measurement and control unit are monitored this wireless telecommunication system sub-district, obtain the space interface signaling of mobile phone to be positioned, obtain the information of radio resource allocation of this mobile phone to be positioned.
Step S107: main measurement and control unit issue the information of radio resource allocation of this mobile phone to be positioned and give those subsidiary unit.
Step S108: main measurement and control unit and those subsidiary unit are according to the information of radio resource allocation of this mobile phone to be positioned that distributes, measure the time difference of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned, wherein the time difference of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned that this master measures and control unit measures is t0, and the time difference of this wireless telecommunication system cell downlink signal is ti (i is a natural number) to this mobile phone upward signal to be positioned that those subsidiary unit measure relatively.
Step S109: the main measurement and time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of mobile phone upward signal time of advent to be positioned that control unit calculates those subsidiary unit and this master measurement and control unit.Wherein, mobile phone upward signal to be positioned time of advent is exactly the time difference of the relative wireless telecommunication system cell downlink of the mobile phone upward signal to be positioned signal in the previous step.
Step S110: main measure and control unit according to the cell position of self, cell position that those subsidiary unit report and these mobile phone upward signal to be positioned time difference dti of the time of advent, reach the time difference method according to general signal, estimate the position of this mobile phone to be positioned.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
Step S111: main measure and reporting position that control unit will this mobile phone to be positioned to the user.
In addition, when certain/when the position of a little subsidiary unit changed, the subsidiary unit that then changes was received from oneself cell position again, with cell position report main measure and control unit to upgrade original value.
(second embodiment)
Based on the method for first embodiment, the invention allows for a kind of wireless location system based on Measurement Network.See also Fig. 4, wireless location system comprises main a measurement and control unit 40 and a plurality of subsidiaries unit 41 (diagram is an example with one).Wherein, main measurement and control unit 40 comprise a GPS receiver 400, the first wireless telecommunication system receiver 401, wireless telecommunication system signaling parsing module 402, time difference computing module 403, mobile phone location estimation module 404 and first communication module 405.Subsidiary unit 41 comprises the 2nd GPS receiver 410, second communication module 411 and the second wireless telecommunication system receiver 412.
The operation principle of this wireless location system is as follows: the master measures and control unit 40 and 41 starts of subsidiary unit, and the communication link of setting up between main measurement and control unit 40 and the subsidiary unit 41 by first communication module 405 and second communication module 411 connects.Then, main measure and control unit 40 inserts a sub-district of wireless telecommunication system by the first wireless telecommunication system receiver according to the mobile phone access procedure, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.Simultaneously, main measure and the second wireless telecommunication system receiver 412 of control unit 40 control subsidiary unit 41 inserts these wireless telecommunication system sub-districts, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.
The allocation of radio resources signaling of the space interface signaling of the first wireless telecommunication system receiver, the 401 monitoring wireless communication systems in main measurement and the control unit 40 and the mobile phone to be positioned that will listen to is exported to wireless telecommunication system signaling parsing module 402.Wireless telecommunication system signaling parsing module 402 is resolved the allocation of radio resources signaling of mobile phone to be positioned, obtain the information of radio resource allocation of mobile phone to be positioned, this information is exported to the first wireless telecommunication system receiver 401 on the one hand, exports to first communication module 405 on the other hand simultaneously.First communication module 405 is transferred to second communication module 411 with the information of radio resource allocation of mobile phone to be positioned, and the information of radio resource allocation of the mobile phone to be positioned that the second wireless telecommunication system receiver, 412 foundations, second communication module 411 in the subsidiary unit 41 transmits is measured the time difference ti (i is a natural number) of the relative wireless telecommunication system cell downlink of the upward signal signal of mobile phone to be positioned.Time difference ti sends it back main the measurement and control unit 40 by second communication module 411.First communication module 405 is sent to the time difference ti that receives in the time difference computing module 403.Simultaneously, the first wireless telecommunication system receiver 401 in main measurement and the control unit 40 is measured the time difference t0 of the relative wireless telecommunication system cell downlink of mobile phone upward signal to be positioned signal according to the information of radio resource allocation of mobile phone to be positioned, and exports time difference computing module 403 to.
The time difference that time difference computing module 403 calculates both: dti=ti-t0 (i is a natural number, is the numbering of subsidiary unit) exports result of calculation to mobile phone location estimation module 404.The mobile phone location estimation module according to receive from a GPS receiver 400 main measure and the position of control unit, from the position of the subsidiary unit that first communication module 405 receives and the dti that receives from time difference computing module 403, reach the time difference method according to general signal, estimate the position of this mobile phone to be positioned.At last, mobile phone location estimation module 404 is exported to the user with the mobile phone location estimated value.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
In addition, when certain/when the position of a little subsidiary unit changed, the subsidiary unit that then changes received own cell position by the 2nd GPS receiver again, and cell position is reported main measurement and control unit 40 to upgrade original value.Main measure and control unit 40 also can store the cell position that receives and the value of ti.
(the 3rd embodiment)
Fig. 5 shows the flow process of another embodiment of the wireless location method based on Measurement Network of the present invention, sees also Fig. 5, is the detailed description to each step in this method flow below.
Step S200: each unit start, set up communication link and connect.Each unit here comprises a main measurement and control unit and a plurality of subsidiaries unit, the connection of setting up communication link between main measurement and control unit and whole subsidiary unit.
Step S201: main measure and control unit inserts a sub-district of wireless telecommunication system according to the mobile phone access procedure, obtain time of this wireless telecommunication system and frequency synchronously.
Step S202: main measure and control unit is controlled whole subsidiaries unit and inserted this wireless telecommunication system sub-district, obtain time of this wireless telecommunication system and frequency synchronously.
Step S203: main measurement and control unit and those subsidiary unit carry out GPS and receive to obtain the positional information of unit self.
Step S204: those subsidiary unit report main the measurement and control unit with the cell position of self.
Step S205: main measurement and control unit are monitored this wireless telecommunication system sub-district, obtain the space interface signaling of mobile phone to be positioned, obtain the information of radio resource allocation of this mobile phone to be positioned.
Step S206: main measurement and control unit issue the information of radio resource allocation of this mobile phone to be positioned and give those subsidiary unit.
Step S207: main measurement and control unit are handed down to the subsidiary unit at interval with initial Measuring Time and measurement.
The measurement gap periods here is generally the integral multiple of wireless system frame.The initial Measuring Time here is a default wireless system frame number, and this default wireless system frame number generally is that current wireless system frame number adds pairing wireless system frame number behind 1～2 second the amount of delay.In addition, initial Measuring Time also can be the GPS standard time of setting.Adopt the GPS standard time as the reference of the time of advent of mobile phone upward signal, adopt the mode of wireless system frame number relatively, transinformation is bigger relatively, and the measurement of each unit also needs further synchronously.The method step of relative first embodiment, the difference of present embodiment is the increase of this step, use the start-up time and the cycle of location survey in the present embodiment, each unit that contrasts first embodiment is in asynchronous measurement, the performance of synchro measure is better, more is highly resistant to the mobile phone upward signal relative error of launch time.
Step S208: main measurement and control unit issue the information of radio resource allocation of this mobile phone to be positioned and give those subsidiary unit.
Step S209: main measurement and control unit and those subsidiary unit are according to the information of radio resource allocation of this mobile phone to be positioned that distributes, measure the time difference (that is time migration of the upward signal time of advent of mobile phone to be positioned and base station signal frame head position) of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned, wherein the time difference (time migration) of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned that this master measures and control unit measures is t0, and the time difference (time migration) of this wireless telecommunication system cell downlink signal is ti (i is a natural number) to this mobile phone upward signal to be positioned that those subsidiary unit measure relatively.
Step S210: the main measurement and time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of mobile phone upward signal time of advent to be positioned that control unit calculates those subsidiary unit and this master measurement and control unit.Wherein, mobile phone upward signal to be positioned time of advent is exactly the time difference (that is time migration) of the relative wireless telecommunication system cell downlink of the mobile phone upward signal to be positioned signal in the previous step.
Step S211: main measure and control unit according to the cell position of self, cell position that those subsidiary unit report and these mobile phone upward signal to be positioned time difference dti of the time of advent, reach the position that the time difference method is estimated this mobile phone to be positioned according to general signal.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
Step S212: main measure and reporting position that control unit will this mobile phone to be positioned to the user.
In addition, when certain/when the position of a little subsidiary unit changed, the subsidiary unit that then changes was received from oneself cell position again, with cell position report main measure and control unit to upgrade original value.
(the 4th embodiment)
Based on the method for the 3rd embodiment, the invention allows for a kind of wireless location system based on Measurement Network.See also Fig. 6, the wireless location system of present embodiment comprises: main a measurement and control unit 50 and a plurality of subsidiaries unit 51 (diagram is an example with one).Wherein, main measurement and control unit 50 comprise a GPS receiver 500, the first wireless telecommunication system receiver 501, wireless telecommunication system signaling parsing module 502, time difference computing module 503, mobile phone location estimation module 504, first communication module 505 and control module 506.Subsidiary unit 51 comprises the 2nd GPS receiver 510, second communication module 511 and the second wireless telecommunication system receiver 512.
The operation principle of this wireless location system is as follows: the master measures and control unit 50 and 51 starts of subsidiary unit, and the communication link of setting up between main measurement and control unit 50 and the subsidiary unit 51 by first communication module 505 and second communication module 511 connects.Then, main measure and control unit 50 inserts a sub-district of wireless telecommunication system by the first wireless telecommunication system receiver according to the mobile phone access procedure, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.Simultaneously, main measure and the second wireless telecommunication system receiver 512 of control unit 50 control subsidiary unit 51 inserts these wireless telecommunication system sub-districts, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.
The allocation of radio resources signaling of the space interface signaling of the first wireless telecommunication system receiver, the 501 monitoring wireless communication systems in main measurement and the control unit 50 and the mobile phone to be positioned that will listen to is exported to wireless telecommunication system signaling parsing module 502.Wireless telecommunication system signaling parsing module 502 is resolved the allocation of radio resources signaling of mobile phone to be positioned, obtain the information of radio resource allocation of mobile phone to be positioned, this information is exported to the first wireless telecommunication system receiver 501 on the one hand, exports to first communication module 505 on the other hand simultaneously.First communication module 505 is transferred to second communication module 511 with the information of radio resource allocation of mobile phone to be positioned.Control module 506 is given initial Measuring Time and measurement gap periods to subsidiary unit 51 by first communication module 505.The initial Measuring Time here is default wireless system frame number, and this wireless system frame number for example is preset to the pairing wireless system frame number of amount of delay that current wireless system frame number adds 1～2 second, and perhaps initial Measuring Time is the default GPS standard time.Measuring gap periods is the integral multiple of wireless system frame.
The second wireless telecommunication system receiver 512 in the subsidiary unit 51 is under the effect of initial Measuring Time and measurement gap periods, and the information of radio resource allocation of the mobile phone to be positioned that foundation second communication module 511 transmits is measured the time difference ti (i is a natural number) of the relative wireless telecommunication system cell downlink of the upward signal signal of mobile phone to be positioned.Time difference ti sends it back main the measurement and control unit 50 by second communication module 511.First communication module 505 is sent to the time difference ti that receives in the time difference computing module 503.Simultaneously, the first wireless telecommunication system receiver 501 in main measurement and the control unit 50 is measured the time difference t0 of the relative wireless telecommunication system cell downlink of mobile phone upward signal to be positioned signal according to the information of radio resource allocation of mobile phone to be positioned, and exports time difference computing module 503 to.
The time difference that time difference computing module 503 calculates both: dti=ti-t0 (i is a natural number, is the numbering of subsidiary unit) exports result of calculation to mobile phone location estimation module 504.The mobile phone location estimation module according to receive from a GPS receiver 500 main measure and the position of control unit, from the position of the subsidiary unit that first communication module 505 receives and the dti that receives from time difference computing module 503, reach the time difference method according to general signal, estimate the position of this mobile phone to be positioned.At last, mobile phone location estimation module 504 is exported to the user with the mobile phone location estimated value.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
In addition, when certain/when the position of a little subsidiary unit changes, the subsidiary unit that then changes receives own cell position by the 2nd GPS receiver again, and cell position is reported main measurement and control unit 50 to upgrade original value by second communication module 511.Main measure and control unit 50 also can store the cell position that receives and the value of ti.
(the 5th embodiment)
Fig. 7 shows the flow process of the another embodiment of the wireless location method based on Measurement Network of the present invention, sees also Fig. 7, is the detailed description to each step in this method flow below.
Step S300: each unit start, set up communication link and connect.Each unit here comprises a main measurement and control unit and a plurality of subsidiaries unit, the connection of setting up communication link between main measurement and control unit and whole subsidiary unit.
Step S301: main measure and control unit inserts a sub-district of wireless telecommunication system according to the mobile phone access procedure, obtain time of this wireless telecommunication system and frequency synchronously.
Step S302: main measure and control unit is controlled whole subsidiaries unit and inserted this wireless telecommunication system sub-district, obtain time of this wireless telecommunication system and frequency synchronously.
Step S303: main measurement and control unit and those subsidiary unit carry out GPS and receive to obtain the positional information of unit self, obtain the GPS local time of unit self simultaneously.
Step S304: main measurement and control unit select a wireless system frame number of wireless telecommunication system sub-district to notify those subsidiary unit.Wireless system frame number described here is that current wireless system frame number adds pairing wireless system frame number behind 1～2 second the amount of delay.
Step S305: those subsidiary unit report main the measurement and control unit with self cell position, simultaneously with this wireless telecommunication system sub-district relatively the time difference Ti (i is a natural number) of the GPS local time of self report main the measurement and control unit.The wireless telecommunication system sub-district described here relatively time difference Ti of the GPS local time of self is the time migration between immediate with it GPS frame start position and the wireless system start frame original position after the wireless system frame start position in the position of measuring unit self.
Step S306: main measure and control unit is measured this wireless telecommunication system sub-district the time difference of the GPS local time of self is T0 relatively, same, T0 that is measure in the self-position time migration between the immediate with it GPS frame start position and wireless system start frame original position after the wireless system frame start position.
Step S307: the relative main measurement of time difference of the GPS local time of relative each the subsidiary unit of master's measurement and control unit calculating wireless telecommunication system sub-district and difference dTi=Ti-T0 of the time difference of the GPS local time of control unit with the wireless telecommunication system sub-district.
Step S308: main measurement and control unit are monitored this wireless telecommunication system sub-district, obtain the space interface signaling of mobile phone to be positioned, obtain the information of radio resource allocation of this mobile phone to be positioned.
Step S309: main measurement and control unit issue the information of radio resource allocation of this mobile phone to be positioned and give those subsidiary unit.
Step S310: main measurement and control unit are handed down to the subsidiary unit at interval with initial Measuring Time and measurement.
The measurement gap periods here is generally the integral multiple of wireless system frame.The initial Measuring Time here is a default wireless system frame number, and this default wireless system frame number generally is that current wireless system frame number adds pairing wireless system frame number behind 1～2 second the amount of delay.In addition, initial Measuring Time also can be the GPS standard time of setting.Adopt the GPS standard time as the reference of the time of advent of mobile phone upward signal, adopt the mode of wireless system frame number relatively, transinformation is bigger relatively, and the measurement of each unit also needs further synchronously.
Certainly, this step can optionally be omitted.
Step S311: main measurement and control unit issue the information of radio resource allocation of this mobile phone to be positioned and give those subsidiary unit.
Step S312: main measurement and control unit and those subsidiary unit are according to the information of radio resource allocation of this mobile phone to be positioned that distributes, measure the time difference (that is time migration of the upward signal time of advent of mobile phone to be positioned and base station signal frame head position) of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned, wherein the time difference (time migration) of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned that this master measures and control unit measures is t0, and the time difference (time migration) of this wireless telecommunication system cell downlink signal is ti (i is a natural number) to this mobile phone upward signal to be positioned that those subsidiary unit measure relatively.
Step S313: the main measurement and time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of mobile phone upward signal time of advent to be positioned that control unit calculates those subsidiary unit and this master measurement and control unit.Wherein, mobile phone upward signal to be positioned time of advent is exactly the time difference (that is time migration) of the relative wireless telecommunication system cell downlink of the mobile phone upward signal to be positioned signal in the previous step.
Step S314:, deduct the dTi among the step S307 to each time difference dti.This difference as new time difference dti to replace initial value.
Step S315: main measure and control unit according to the cell position of self, cell position that those subsidiary unit report and these mobile phone upward signal to be positioned time difference dti of the time of advent, reach the position that the time difference method is estimated this mobile phone to be positioned according to general signal.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
Step S316: main measure and reporting position that control unit will this mobile phone to be positioned to the user.
In addition, when certain/when the position of a little subsidiary unit changes, the subsidiary unit that then changes is received from oneself cell position and GPS local time again, with cell position and wireless telecommunication system sub-district relatively the time difference Ti of the GPS local time of self together report main measure and control unit to upgrade original value.
The method of present embodiment contrast the first and the 3rd embodiment, reference cell by measuring each unit is poor between synchronous with GPS synchronously, corrected the different measuring unit because the time difference that the relative base station down signal that the position difference causes arrives, its net synchronization capability is better.
Fig. 8 is the signaling process figure of present embodiment.In conjunction with Fig. 8, can there be one better to understand to above-mentioned process step.
(the 6th embodiment)
Based on the method for a last embodiment, the present invention proposes a kind of another embodiment of the wireless location system based on Measurement Network.See also Fig. 9, this wireless location system mainly comprises: main a measurement and control unit 60 and a plurality of subsidiaries unit 61 (diagram is an example with one).Wherein, main measurement and control unit 60 comprise a GPS receiver 600, the first wireless telecommunication system receiver 601, wireless telecommunication system signaling parsing module 602, time difference computing module 603, mobile phone location estimation module 604, first communication module 605, control module 606 and the first reference cell time difference calculating unit 606.Subsidiary unit 61 comprises the 2nd GPS receiver 610, second communication module 611, the second wireless telecommunication system receiver 612 and the second reference cell time difference calculating unit 613.
The operation principle of this wireless location system is as follows: the master measures and control unit 60 and 61 starts of subsidiary unit, and the communication link of setting up between main measurement and control unit 60 and the subsidiary unit 61 by first communication module 605 and second communication module 611 connects.Then, main measure and control unit 60 inserts a sub-district of wireless telecommunication system by the first wireless telecommunication system receiver according to the mobile phone access procedure, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.Simultaneously, main measure and the second wireless telecommunication system receiver 612 of control unit 60 control subsidiary unit 61 inserts these wireless telecommunication system sub-districts, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously.
The one GPS receiver 600 of main measurement and control unit 60 receives gps satellite signals, finish position measurement of self and the GPS local time of self, cell position is exported to mobile phone location estimation module 604, simultaneously the GPS local time of self is exported to the first reference cell time difference calculating unit 606.The 2nd GPS receiver 610 in the subsidiary unit 61 also receives gps satellite signal, finishes position measurement of self and the GPS local time of self.
Main measure and the control module 606 of control unit 60 will be corrected the witness mark time and is handed down to each subsidiary unit 61 by first communication module 605.The rectification witness mark time here is a wireless system frame number of wireless telecommunication system sub-district, for example is that current wireless system frame number adds pairing wireless system frame number behind 1～2 second the amount of delay.
The 2nd GPS receiver 610 is exported to second communication module 611 with cell position, then is transferred to first communication module, 605, the first communication modules 605 and again the cell position of subsidiary unit is exported to mobile phone location estimation module 604.Simultaneously, the 2nd GPS receiver 610 is exported to the second reference cell time difference calculating unit 613 with the GPS local time.The second reference cell time difference calculating unit 613 receives timing and the GPS local time from the selected wireless telecommunication system sub-district of the second wireless telecommunication system receiver 612, calculate the wireless telecommunication system sub-district time difference Ti (i is a natural number) of the GPS local time of self relatively.The wireless telecommunication system sub-district described here relatively time difference Ti of the GPS local time of self is the time migration between immediate with it GPS frame start position and the wireless system start frame original position after the wireless system frame start position in the position of measuring unit self.
Time difference Ti sends by second communication module 611, by first communication module, 605 receptions of main measurement and control unit 60, and sends in the time difference computing module 603.Simultaneously, in main measurement and control unit 60, the first reference cell time difference calculating unit 606 receives from the GPS local time of a GPS receiver 600 with from the timing of the wireless telecommunication system sub-district of the first wireless telecommunication system receiver 601, the time difference of the GPS local time of self is T0 relatively to calculate the wireless telecommunication system sub-district, same, T0 that is measure in the self-position time migration between the immediate with it GPS frame start position and wireless system start frame original position after the wireless system frame start position.T0 is admitted in the time difference computing module 603, and time difference computing module 603 calculates dTi=Ti-T0.
The allocation of radio resources signaling of the space interface signaling of the first wireless telecommunication system receiver, the 601 monitoring wireless communication systems in main measurement and the control unit 60 and the mobile phone to be positioned that will listen to is exported to wireless telecommunication system signaling parsing module 602.Wireless telecommunication system signaling parsing module 602 is resolved the allocation of radio resources signaling of mobile phone to be positioned, obtain the information of radio resource allocation of mobile phone to be positioned, this information is exported to the first wireless telecommunication system receiver 601 on the one hand, exports to first communication module 605 on the other hand simultaneously.First communication module 605 is transferred to second communication module 611 with the information of radio resource allocation of mobile phone to be positioned.Control module 606 is given initial Measuring Time and measurement gap periods to subsidiary unit 61 by first communication module 605.The initial Measuring Time here is default wireless system frame number, and this wireless system frame number for example is preset to the pairing wireless system frame number of amount of delay that current wireless system frame number adds 1～2 second, and perhaps initial Measuring Time is the default GPS standard time.Measuring gap periods is the integral multiple of wireless system frame.Certainly, this operation of control module 606 can optionally be omitted.
The second wireless telecommunication system receiver 612 in the subsidiary unit 61 is under the effect of initial Measuring Time and measurement gap periods, and the information of radio resource allocation of the mobile phone to be positioned that foundation second communication module 611 transmits is measured the time difference ti (i is a natural number) of the relative wireless telecommunication system cell downlink of the upward signal signal of mobile phone to be positioned.Time difference ti sends it back main the measurement and control unit 60 by second communication module 611.First communication module 605 is sent to the time difference ti that receives in the time difference computing module 603.Simultaneously, the first wireless telecommunication system receiver 601 in main measurement and the control unit 60 is measured the time difference t0 of the relative wireless telecommunication system cell downlink of mobile phone upward signal to be positioned signal according to the information of radio resource allocation of mobile phone to be positioned, and exports time difference computing module 603 to.
The time difference that time difference computing module 603 calculates both: dti=ti-t0-dTi (i is a natural number, is the numbering of subsidiary unit) exports result of calculation to mobile phone location estimation module 604.The mobile phone location estimation module according to receive from a GPS receiver 600 main measure and the position of control unit, from the position of the subsidiary unit that first communication module 605 receives and the dti that receives from time difference computing module 603, reach the time difference method according to general signal, estimate the position of this mobile phone to be positioned.At last, mobile phone location estimation module 604 is exported to the user with the mobile phone location estimated value.Its principle sees also Figure 10, for instance, the formed intersection point of hyperbola that forms between the hyperbola that forms between main measurement and control unit and the subsidiary unit 1 and main measurement and control unit and the subsidiary unit 2 is the residing position of mobile phone to be positioned.
In addition, when certain/when the position of a little subsidiary unit changes, the subsidiary unit that then changes receives own cell position and GPS local time by the 2nd GPS receiver again, and cell position and the Ti that recomputates are reported main measurement and control unit 60 to upgrade original value by second communication module 611.Main measure and control unit 60 also can store the value of the cell position, Ti and the ti that receive.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (21)
1. the wireless location method based on Measurement Network is treated locating cellphone and is carried out location estimation, and this method comprises:
Main measurement and control unit and a plurality of subsidiaries unit start and set up this main measurement and control unit is connected with communication link between this subsidiary unit;
This main measurement and control unit are according to a sub-district of mobile phone access procedure access wireless telecommunication system, and this master's measurement and control unit obtain the time and the Frequency Synchronization of this wireless telecommunication system;
This master's measurement and control unit are controlled those subsidiary unit and are inserted this wireless telecommunication system sub-district, obtain the time and the Frequency Synchronization of this wireless telecommunication system;
This main measurement and control unit and those subsidiary unit carry out GPS and receive to obtain cell position;
Those subsidiary unit report this master's measurement and control unit with the cell position of self;
This master measures and control unit is monitored this wireless telecommunication system sub-district, obtains the space interface signaling of this mobile phone to be positioned, obtains the information of radio resource allocation of this mobile phone to be positioned;
This master measures and control unit issues the information of radio resource allocation of this mobile phone to be positioned to those subsidiary unit;
This main measurement and control unit and those subsidiary unit are according to the information of radio resource allocation of this mobile phone to be positioned that distributes, measure the time difference of relative this wireless telecommunication system cell downlink signal of this mobile phone upward signal to be positioned, wherein the measured value of this master's measurement and control unit is t0, the measured value of those subsidiary unit is ti, i is a natural number, wherein upward signal is meant that mobile phone to be positioned sends to the signal of this main measurement and control unit and those subsidiary unit, and downstream signal is meant that radio communication system base station sends to the signal of this main measurement and control unit and those subsidiary unit;
The time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of the mobile phone upward signal time of advent to be positioned that this master measures and control unit calculates those subsidiary unit and this master measurement and control unit;
This master measure and control unit according to the cell position of self, cell position that those subsidiary unit report and the difference dti time of advent of this mobile phone upward signal, estimate the position of this mobile phone to be positioned;
This master measures and control unit reports the position of this mobile phone to be positioned to give the user.
2. the described wireless location method based on Measurement Network of claim 1 is characterized in that, also comprises after the information of radio resource allocation that this master measures and control unit issues this mobile phone to be positioned is given the step of those subsidiary unit:
This master measures and control unit is handed down to those subsidiary unit with initial Measuring Time and measurement gap periods.
3. the wireless location method based on Measurement Network according to claim 2 is characterized in that, this initial Measuring Time is a wireless system frame number of setting.
4. the wireless location method based on Measurement Network according to claim 3 is characterized in that, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
5. the wireless location method based on Measurement Network according to claim 2 is characterized in that, this measurement gap periods is the integral multiple of wireless system frame.
6. the wireless location method based on Measurement Network according to claim 2 is characterized in that, this initial Measuring Time is a GPS standard time of setting.
7. the wireless location method based on Measurement Network according to claim 1, it is characterized in that, when the position of those subsidiary unit changed, this method also comprised, the position updating value of the subsidiary unit that measures reported this master measure and control unit.
8. the wireless location method based on Measurement Network according to claim 1 is characterized in that, those subsidiary unit self cell position is reported this master measures and the step of control unit after also comprise:
This master's measurement and control unit are in the GPS local time of carrying out obtaining when GPS receives this master's measurement and control unit;
Those subsidiary unit are in the GPS local time of carrying out obtaining when GPS receives self;
This master measures and control unit control selects a wireless system frame number of this wireless telecommunication system sub-district to notify those subsidiary unit;
Those subsidiary unit when reporting cell position with this wireless telecommunication system sub-district relatively the time difference Ti of the GPS local time of self report this master measurement and control unit, i is a natural number;
This master's measurement and control unit are measured this wireless telecommunication system sub-district, and the time difference of the GPS local time of self is T0 relatively;
This master measures and the difference dTi=Ti-T0 of the time difference of the GPS local time of control unit relative this master's measurement with this wireless telecommunication system sub-district of time difference of the GPS local time of each subsidiary unit relatively of calculating this wireless telecommunication system sub-district and control unit;
Also comprise after the step of the time difference dti=ti-t0 of mobile phone upward signal to be positioned time of advent of this master measures and control unit calculates those subsidiary unit mobile phone upward signal time of advent to be positioned and this master measurement and control unit: this time difference dti is deducted this difference dTi, and wherein upward signal is meant that mobile phone to be positioned sends to the signal of this main measurement and control unit and those subsidiary unit.
9. the wireless location method based on Measurement Network according to claim 8 is characterized in that, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
10. the wireless location method based on Measurement Network according to claim 8, it is characterized in that, when the position of those subsidiary unit changes, this method also comprises, the position updating value of the subsidiary unit that measures is reported this master measures and control unit, remeasure this wireless telecommunication system sub-district simultaneously relatively the GPS local time of self time difference Ti and report this master measurement and control unit.
11. the wireless location system based on Measurement Network is treated locating cellphone and carried out location estimation, this system comprises main measurement and control unit and a plurality of subsidiaries unit,
Wherein this master's measurement and control unit comprise:
The one GPS receiver receives gps satellite signal, finishes the position measurement to self;
Wireless telecommunication system signaling parsing module is resolved the allocation of radio resources signaling of this mobile phone to be positioned, obtains the information of radio resource allocation of this mobile phone to be positioned;
The first wireless telecommunication system receiver, insert a sub-district of wireless telecommunication system, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously, the allocation of radio resources signaling of this mobile phone to be positioned of monitoring the space interface signaling of this wireless telecommunication system simultaneously and will listening to exports this wireless telecommunication system signaling parsing module to, while is measured this mobile phone upward signal to be positioned time difference t0 of this wireless telecommunication system cell downlink signal relatively according to the information of radio resource allocation of this mobile phone to be positioned of this wireless telecommunication system signaling parsing module output, wherein upward signal is meant that mobile phone to be positioned sends to the signal of this main measurement and control unit and those subsidiary unit, and downstream signal is meant that radio communication system base station sends to the signal of this main measurement and control unit and those subsidiary unit;
First communication module sends the information of radio resource allocation of this mobile phone to be positioned of this wireless telecommunication system signaling parsing module output;
The time difference computing module, according to this mobile phone upward signal to be positioned of this wireless telecommunication system receiver output time difference ti of relative this wireless telecommunication system cell downlink signal of upward signal of measured this mobile phone to be positioned in those subsidiary unit of the time difference t0 of this wireless telecommunication system cell downlink signal and the output of this first communication module relatively, calculate both time difference dti=ti-t0, wherein i is a natural number;
The mobile phone location estimation module, measure and the cell position of those subsidiary unit of the position of control unit, this first communication module output and time difference dti that should time difference computing module output according to this of GPS receiver output is main, carry out the location estimation of this mobile phone to be positioned and the result of location estimation is reported the user;
Those subsidiary unit comprise:
Second communication module receives the information of radio resource allocation of this mobile phone to be positioned that this first communication module sends;
The 2nd GPS receiver receives gps satellite signal, finishes the position measurement to self, and by this second communication module position measurements is back to this master's measurement and control unit;
The second wireless telecommunication system receiver, insert this wireless telecommunication system sub-district, the base station signal that receives this wireless telecommunication system with finish self for the base station on time and frequency synchronously, receive the information of radio resource allocation of this mobile phone to be positioned of the output of this second communication module simultaneously, and the relative time difference ti of this wireless telecommunication system cell downlink signal of the upward signal of measuring this mobile phone to be positioned in view of the above, i is a natural number, and those time differences ti sends it back this master by this second communication module and measures and control unit.
12. the wireless location system based on Measurement Network according to claim 11 is characterized in that, this master measures and control unit also comprises:
Control module is handed down to those subsidiary unit with initial Measuring Time and measurement gap periods by this first communication module.
13. the wireless location system based on Measurement Network according to claim 12 is characterized in that, this initial Measuring Time is a wireless system frame number of setting.
14. the wireless location system based on Measurement Network according to claim 13 is characterized in that, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
15. the wireless location system based on Measurement Network according to claim 12 is characterized in that, this measurement gap periods is the integral multiple of wireless system frame.
16. the wireless location system based on Measurement Network according to claim 12 is characterized in that, this initial Measuring Time is a GPS standard time of setting.
17. the wireless location system based on Measurement Network according to claim 11 is characterized in that, the 2nd GPS receiver remeasures positional value and reports this master by this second communication module and measures and control unit when self-position changes.
18. the wireless location system based on Measurement Network according to claim 11 is characterized in that,
In those subsidiary unit, the 2nd GPS receiver is finished the measurement to the GPS local time of self when the completing place is measured; This second wireless telecommunication system receiver is also chosen the timing of this wireless telecommunication system sub-district; Those subsidiary unit also comprise the second reference cell time difference calculating unit, this unit receives the measured value of GPS local time and the timing of this wireless telecommunication system sub-district, calculate this wireless telecommunication system sub-district relative time difference Ti of the GPS local time of self, and report this master measurement and control unit by this second communication unit;
In this main measurement and control unit, a GPS receiver is in the measurement of finishing when the completing place is measured the GPS local time of self, and this first wireless telecommunication system receiver is also chosen the timing of this wireless telecommunication system sub-district; This time difference computing module also comprises the first reference cell time difference calculating unit, this unit receives the measured value of GPS local time and the timing of this wireless telecommunication system sub-district, calculate this wireless telecommunication system sub-district time difference T0 of the GPS local time of self relatively; This time difference computing module according to the Ti of this first communication module output and the T0 of this first reference cell time difference calculating unit output, upgrades this time difference dti again.
19. the wireless location system based on Measurement Network according to claim 18, it is characterized in that the timing of this wireless telecommunication system sub-district that this first wireless telecommunication system receiver and this second wireless telecommunication system receiver are selected is a wireless system frame number of this wireless telecommunication system sub-district.
20. the wireless location system based on Measurement Network according to claim 19 is characterized in that, this wireless system frame number is the pairing wireless system frame number of amount of delay that current wireless system frame number added 1～2 second.
21. the wireless location system based on Measurement Network according to claim 11 is characterized in that, when changing in the position of subsidiary unit, the 2nd GPS receiver in the subsidiary unit is measured self-position and GPS local time again.
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Application publication date: 20090204 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinji Lease (Tianjin) Co.,Ltd. Contract record no.: 2018990000196 Denomination of invention: Wireless location system and method based on measurement network Granted publication date: 20111214 License type: Exclusive License Record date: 20180801 |
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