CN101067652A - Positioning system - Google Patents
Positioning system Download PDFInfo
- Publication number
- CN101067652A CN101067652A CNA2007101268239A CN200710126823A CN101067652A CN 101067652 A CN101067652 A CN 101067652A CN A2007101268239 A CNA2007101268239 A CN A2007101268239A CN 200710126823 A CN200710126823 A CN 200710126823A CN 101067652 A CN101067652 A CN 101067652A
- Authority
- CN
- China
- Prior art keywords
- signal
- signal generating
- generating source
- location terminal
- location
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a positioning system, the problem to be solved is the base station signal is learned the exact time to shorten position finding time and the position finding in the position without the essential quantity satellite signal by the LMU measuring the code phase of the base station signal. A positioning system consists a first signal source, a sencond signal source, a measurement unit, a control unit, a position finding terminal and a communication unit. The measurement unit receives the first signal source position P and the reference time to determine, according to reference time to measure time of receipt TR of stipulation event of sencond signal source. The control unit according to position P and the sencond signal source figures out relative distance |P-Q| of measurement unit and sencond signal source, the signal transmission time t between measurement unit and sencond signal source is computed by signal transmission speed is divided by |P-Q|, TR-t calculates the time TT of stipulation event of sencond signal source, the position finding terminal based on TT receives the sign of first signal source to find position of position finding terminal.
Description
The application be that February 27, application number in 2004 are 200410006070.4 the applying date, denomination of invention divides an application for the Chinese invention patent application of " location system ".
Technical field
The present invention relates to (Global Positioning System: GPS) carry out the location system of location with support GPS such as mobile telephone networks.
Background technology
Non-patent literature 1:3GPP Specification TS25.305 V5.4.0
GPS works as global positioning system.In GPS, receive the signal that produces by satellite, be determined to the distance of satellite, detect the position that receives the place.Therefore, in GPS, must know position and time when satellite produces signal.Though satellite position information is sent out as year calendar, ephemeris information from satellite self, by receiving satellite, can access these information, receiving full detail needs about 15 minutes time.In addition,, therefore receive the signal that sends from 4 satellites, calculate position and time according to the simultaneous equations that three-dimensional location coordinates and time 4 unknown numbers are arranged owing to be difficult to provide correct time information usually.As existing technology, network support type GPS is arranged, this network support type GPS is not from satellite-signal but for example obtains the required information of location such as these satellite position information and time from other approach such as mobile telephone networks, can obviously improve required time of location and precision.For the mobile phone of WCDMA mode, the positioning method of network support type GPS has been carried out standardization (with reference to non-patent literature 1) by 3GPP (ThirdGeneration Partnership Project).
In addition, among the GPS, in order to detect latitude, longitude, 3 dimension position coordinates and times of height, must receive at least 4 satellite-signals, if and supposition highly is a ground surface, then, must receive at least 3 satellite-signals in order to detect latitude, 2 dimension position coordinates and times of longitude.When the visual field condition of satellite was bad by the time between the high building in indoor, city, differing sometimes received the satellite-signal of necessary amount surely.In this case, known have a kind of base station electric wave signal telephone network to be considered as the technology that satellite-signal carries out location, and it has been standardized as OTDOA (Observed Time Difference Of Arrival: observable time of arrival is poor) mode location technology in non-patent literature 1.Fig. 3 is the figure that is illustrated in the principle of the existing network support type GPS of regulation in the non-patent literature 1.SAS (Stand Alone Serving Mobile Location Center: the stand-alone service mobile location centre Chinese) 12 receive gps satellite signal, obtain the required year calendar of position probing, almanac data, certain position of known SAS12 in addition, according to the difference of this known position, also can generate the data that are used to proofread and correct the location error with the location result who obtains from gps signal.And SAS12 also carries out RNC (Radio Network Controller: 13a SMLC (the Serving Mobile Location Center: the part of function Serving Mobile Location Center) that should carry out radio network controller) sometimes.RNC13a controls base station 15a, carries out required sequential control of location and radio resource management.RNC13a according to the portable terminal of location object (UE:UserEquipment: location ability subscriber equipment), determine necessary support data from SAS12, send to UE16 according to the location order by base station 15a.UE carries out the required timing of location can utilize pilot signal that base station 15a sends etc.Location measurement unit) and the deviation of gps time generally, in the WCDMA mode, base station and gps satellite are asynchronous, measure the LMU be arranged in each base station (Location Measurement Unit:.LMU have the type A that is connected with base station radio and with the type B of base station wired connection.
Like this, in the time of will in the mobile telephone network of existing WCDMA mode, realizing network support type GPS, the device (LMU) that each base station all must have signal that the base station of the wireless access network of the never any synchronized relation of instrumentation sends and GPS to produce the time deviation between the signal that sends.
In addition, because in the existing OTDOA technology, base station signal each other is also asynchronous, must use the timing difference between the instrumentation base station someway.Also be in each base station, LMU to be set, the timing difference of signal between the base stations detected.
Summary of the invention
The objective of the invention is to realize following location system: the base station is in asynchronous WCDMA mode mobile telephone network, not be used in each base station LMU is set, just can notify correct time, can carry out location by the OTDOA mode, low price and reliability height to location object portable terminal.
Another object of the present invention is to provide a kind of is not provided with LMU and can carries out the high location system of location and precision at short notice.
Location system of the present invention has: one or more the 1st signal generating sources of the signal that generation and reference time are synchronous; Produce one or more the 2nd signal generating sources with the nonsynchronous signal of described the 1st signal generating source; The instrumentation unit; Control module; Have and be used to receive the described the 1st and the location terminal of the receiving element of the 2nd signal generating source signal; And the communication unit that between described control module and described location terminal, communicates, it is characterized in that, the position P and the described reference time of the signal of described the 1st signal generating source determined to receive in described instrumentation unit, according to the time of reception TR of the regulation incident of the signal of described the 2nd signal generating source of described reference time instrumentation; Described control module is calculated the relative distance of described instrumentation unit and described the 2nd signal generating source according to the position P of the described instrumentation unit of described instrumentation unit instrumentation and the position Q of described the 2nd signal generating source | P-Q|, remove described with signaling rate | P-Q|, calculate the signal transmission time t between described instrumentation unit and described the 2nd signal generating source, use T
R-t calculates the time T of described the 2nd signal generating source generation regulation incident
T, described location terminal is used described T
TBe benchmark, carry out reception, carry out the location of described location terminal from the signal of described the 1st signal generating source.
By taking above-mentioned formation, has following effect: use portable terminal in the good place of condition, the transmission of instrumentation base station signal regularly, by giving location object portable terminal this time announcement, even in each base station LMU is not set all, location object portable terminal also can be known correct time, can shorten the location time.In addition, because do not need LMU, so have the effect that can reduce the required cost of construction systems.
Location system of the present invention has: one or more the 1st signal generating sources of the signal that generation and reference time are synchronous; Produce one or more the 2nd signal generating sources with the nonsynchronous signal of described the 1st signal generating source; The instrumentation unit; Control module; Have and be used to receive the described the 1st and the location terminal of the receiving element of the 2nd signal generating source signal; And the communication unit that between described control module and described location terminal, communicates, it is characterized in that, the position P and the reference time of the signal of described the 1st signal generating source determined to receive in described instrumentation unit, according to the time of reception T of the regulation incident of the signal of described the 2nd signal generating source of described reference time instrumentation
RDescribed control module is calculated the relative distance of described instrumentation unit and described the 2nd signal generating source according to the position P of the described instrumentation unit of described instrumentation unit instrumentation and the position Q of described the 2nd signal generating source | P-Q|, remove described with signaling rate | P-Q|, calculate the signal transmission time t between described instrumentation unit and the 2nd signal generating source, use T
R-t calculates the time T of described the 2nd signal generating source generation regulation incident
T, described location terminal is used described T
TBe benchmark, receive, carry out the location of described location terminal from the signal of described the 1st signal generating source or from the signal of described the 2nd signal generating source.
According to above-mentioned formation of the present invention, has following effect; The LMU of high price need not be set, by by the time of reception of location object portable terminal instrumentation from the specified signal of base station, the T that uses the portable terminal instrumentation in the good place of this value and condition to calculate
T, can calculate the distance of location object portable terminal to the base station, also can carry out location even not necessarily be necessary under the situation in the visual field of quantity at gps satellite.
Description of drawings
Fig. 1 is the figure of expression location system of the present invention.
Fig. 2 is the block scheme that is illustrated in the portable terminal that uses in the location system of the present invention.
Fig. 3 is the figure of the location system in the existing WCDMA mode mobile telephone system of expression.
Symbol description
1a, 1b, 1c, 1d:GPS satellite; 2a, 2b: base station; 3: portable terminal a; 4: portable terminal b; 6:RNC (SMLC); 7:SAS.
Embodiment
Below, with reference to the accompanying drawings, embodiments of the present invention are described.
Embodiment 1
Fig. 1 is the figure of the major part of expression location system of the present invention.Reference station 8 receives the signal of gps satellite, obtains required astronomical year book of location and almanac data.In addition, the position of reference station 8 is known, and relatively this position and the location result that obtains from gps signal generate the location correction data.The data that obtain are stored among the SAS 7.Portable terminal a 3 is following terminals: it learns position and the time that it is general according to location position last time, is in the good place of condition of the satellite that can receive the required sufficient amount of location well.RNC 6 has the SMLC function, carries out required resource management of location and sequential control.Portable terminal b 4 is the target terminals that carry out location.As shown in Figure 2, each portable terminal has GPS receiver 9 that receives gps signal and the WCDMA Base-Band Processing portion 10 that is used for as mobile phone work.
Portable terminal a 3 is following portable terminals: its by last time location know gps time, correction is built in the clock of terminal, know correct time, even perhaps do not know correct time, also can receive the electric wave of satellite 1a, 1b, 1c, 1d with enough signal intensities, can carry out location separately.RNC 6 is by base station a 2a, regularly to portable terminal a 3 inquiry current location P with observe the gps time T of the particular event of the signal that base station a 2a sends
R, according to this as a result calculation base station a 2a send the gps time T of the particular event of signal
TThe particular event that takes place as the base station, for example the transmission of the frame boundaries of the pilot signal of being sent by the base station and specific system frame number (as system frame number 0) etc. is more suitable.Reason is: per 20 milliseconds of information that send 1 bit among the GPS; On the other hand, because the frame of WCDMA is set at 10 milliseconds, calculate than being easier to.In addition, when all portable terminals are in the sub-district, owing to, can know the timing of frame, so special signal need not newly be set for location by receiving pilot signal.In Fig. 2, the timing and/or the system frame number of this frame is sent to GPS receiver 9 from WCDMA Base-Band Processing portion 10.
Can be as follows according to time T
RComputing time T
TThe position Q of known base station a 2a can calculate according to following formula.
(formula 1) T
T=T
R-| P-Q|/c
Wherein, c is the light velocity.And | P-Q| represents the distance between P, the Q, also has
(formula 2) t=|P-Q|/c
Being electric wave propagates into the required time of portable terminal 3 from base station a 2a.
Because even portable terminal a 3 is in the good position of condition, obtain the required whole astronomical year books of location and almanac data also needs tens minutes from satellite, this is unactual, therefore, obtains the support data that are stored among the SAS 7 by RNC6 usually and utilizes.
In case all portable terminal energized are just retrieved base station signal, determine the sub-district at current place, report to RNC 6.Thereby RNC 6 has the tabulation of all portable terminals in this sub-district.RNC 6 regularly inquires P and T to the portable terminal in the good place of condition according to this tabulation
R, make T
TAlways keep last state.Perhaps also can make portable terminal when the good position of the condition that is positioned at, on one's own initiative regular reporting P and T
RCertainly, the portable terminal in the good place of condition is not one, has a plurality ofly usually, and RNC 6 can be used to the report from these all terminals, utilizes computing methods such as minimum 2 multiplication, determines the T that precision is higher
T
Portable terminal b 4 is terminals of the position of the non-constant of condition such as between indoor, high building.Even in such position, also can improve sensitivity and carry out location by satellite-signal is added up several times.If but know correct time, the time that begins accumulative total is not carried out to a certain degree restriction, then the time of detection signal cost very long, cause in fact can not carrying out location.The T that portable terminal b 4 can calculate according to pilot signal and the RNC 6 of base station a 2a
T, calculate the time roughly.That is, the time of reception T of the particular frame of portable terminal b 4 receptions can represent with following formula.
(formula 3) T=T
T+ n * 10 microseconds+T
P
Here, n is from observing T
TBegin to receive the number of the frame that base station a 2a is sent till this frame, T to portable terminal b4
PIt is the transmission time of signal from base station a 2a to portable terminal b4.1 frame time (10 microsecond) according to the 3GPP standard be controlled in ± 0.05ppm in, if carry out T with frequency to a certain degree
TRenewal, then error is little.In addition, because T
PSo can not determine that ignoring it utilizes.
Portable terminal b 4 is according to the support data and the T that are provided by SAS7 that obtain by RNC6, and the retrieval window that limits satellite-signal carries out input and comes location.
Portable terminal b 4 is by knowing T, the limit search window, even condition is poor, and also can be by receiving 4 satellites, obtain the three-dimensional position of portable terminal b 4 and time 4 simultaneous equationss, thereby learn its position as unknown number.
Portable terminal b 4 is by knowing T, the limit search window, even condition is poor, and also can be by receiving the signal of 3 satellites, obtain the two-dimensional position of portable terminal b 4 and time 3 simultaneous equationss, thereby learn its position as unknown number.
Because the T of formula 3 can replace gps time, the position of base station also is known, therefore, can replace gps time with base station signal.That is, portable terminal b 4 can be by receiving 3 satellites and a base station signal, obtains 3 of portable terminal b 4 is tieed up positions and time 4 simultaneous equationss as unknown number, thereby learn its position.
Portable terminal b 4 can also be by receiving 2 satellites and 1 base station signal, obtains 2 of portable terminal b 4 is tieed up positions and time as 3 simultaneous equationss of unknown number, learns its position.
Portable terminal b 4 can also be by receiving 2 satellites and 2 base station signals, obtains 3 of portable terminal b 4 is tieed up positions and time 4 simultaneous equationss as unknown number, thereby learn its position.
Below same, it is 4 o'clock that portable terminal b 4 adds up at the satellite that can receive and base station signal, can obtain 3 of portable terminal b 4 is tieed up positions and time 4 simultaneous equationss as unknown number, thereby learn its position.And the total in satellite that can receive and base station is 3 o'clock, can know for 2 dimension position and times.When here, the number of satellite or base station also comprises zero.That is to say,,, also can determine 2 dimension positions even then can not receive satellite fully if the base station number that for example can receive is 3.
In addition, even base station signal is not used as benchmark, also can be, be superimposed upon signals such as specific signal in the radio broadcast wave as benchmark the synchronizing signal of for example TV station's electric wave.Particularly along with as the 3rd generation mobile phone the reinforcement of multimedia function of feature, under the situations such as portable terminal that are built-in with the television image receiver, effect is relatively good.
According to the present invention, because measure base station signal regularly by portable terminal, so need not be equipped with LMU especially, in the nonsynchronous to each other mobile telephone network in base station system, also can be notified to the location terminal to correct time according to base station signal, the location terminal is used this time, can carry out high-precision location to lack the location time.
In addition,, do not use LMU and measure the base station regularly, can determine the phase place of base station signal, even, can carry out location yet using base station signal and gps satellite can not receive under the situation of gps signal of necessary amount by portable terminal according to the present invention.
Claims (12)
1, a kind of location terminal, this location terminal has receiving element, this receiving element pair and the 1st signal that is produced with reference to a plurality of the 1st signal generating sources that constantly synchronously produce signal, and produce not the 2nd signal that single or a plurality of the 2nd signal generating sources with the synchronous signal of described the 1st signal generating source are produced and receive, this location terminal feature is that this location terminal has:
Moment computing unit, (P is the position that other instrumentation unit different with described location terminal receives the signal that is produced by described the 1st signal generating source by TT=TR-|P-Q|/c for it, Q is the position of described the 2nd signal generating source, | P-Q| is the relative distance of P and Q, C is a signaling rate, TR is that P and described with reference to receiving moment of the 1st regulation incident of the signal of described the 2nd signal generating source with reference to what constantly calculate at P constantly and according to described is determined in described instrumentation unit) calculate (TT) constantly, till playing described receiving element and receive the 2nd regulation incident that is produced by described the 2nd signal generating source from the time point in described moment (TT) of described calculating, the event number that is produced according to described the 2nd signal generating source calculates the time of reception (T) that described receiving element receives described the 2nd regulation incident;
Signal receiving unit, it uses described time of reception (T) that described moment computing unit calculates to receive signal from described the 1st signal generating source as benchmark by described receiving element;
The location unit, it uses by what described signal receiving unit received and carries out the location of described location terminal from the signal of described the 1st signal generating source.
2, location terminal according to claim 1, this location terminal feature are that described the 1st signal generating source is a gps satellite.
3, location terminal according to claim 1, this location terminal feature are that described the 2nd signal generating source is the base station that mobile radio communication is used.
4, location terminal according to claim 3, this location terminal feature is, described instrumentation unit is to be in the portable terminal that can receive well from the position of the signal of described the 1st signal generating source, the described position of instrumentation, described instrumentation unit (P) and the described moment (TR), and to the described position (P) and described moment (TR) of described control module proactive notification instrumentation.
5, location terminal according to claim 3, this location terminal feature is, described instrumentation unit is to be in the portable terminal that can receive well from the position of the signal of described the 1st signal generating source, described instrumentation unit comes the described position of instrumentation (P) and the described moment (TR) according to the request from described control module, and notifies described control module with the described position (P) and the described moment (TR) of instrumentation.
6, according to arbitrary described location terminal in the claim 1 to 5, this location terminal feature is that described the 2nd signal generating source is the television transmitting station.
7, a kind of location terminal, this location terminal has receiving element, this receiving element pair and the 1st signal that is produced with reference to a plurality of the 1st signal generating sources that constantly synchronously produce signal, and produce not the 2nd signal that single or a plurality of the 2nd signal generating sources with the synchronous signal of described the 1st signal generating source are produced and receive, this location terminal feature is that this location terminal has:
Moment computing unit, (P is different with the described location terminal positions that receive the signal that is produced by described the 1st signal generating source corresponding to the instrumentation unit of described each the 2nd signal generating source by TT=TR-|P-Q|/c for it, Q is the position of described the 2nd signal generating source, | P-Q| is the relative distance of P and Q, C is a signaling rate, TR is that P and described with reference to receiving moment of regulation incident of the signal of described the 2nd signal generating source with reference to what constantly calculate at P constantly and according to described is determined in described instrumentation unit) calculate (TT) constantly, according to moment (TT) of described calculating and play described location terminal from the time point in the described moment (TT) and receive the event number that described the 2nd signal generating source is produced till the regulation incident that is produced by described the 2nd signal generating source and calculate the time of reception (T) that described location terminal receives described regulation incident;
Signal receiving unit, it uses described time of reception (T) that described moment computing unit calculates to receive from the signal of described the 1st signal generating source or from the signal of described the 2nd signal generating source by described receiving element as benchmark;
Correcting unit, it proofreaies and correct the asynchronous of described the 1st, the 2nd signal generating source to the signal from described the 2nd signal generating source that is received by described signal receiving unit according to the described moment (TT);
The location unit, it uses by what described signal receiving unit received and carries out the location of described location terminal from the signal of described the 1st signal generating source and/or by what described correcting unit was proofreaied and correct from the signal of the 2nd signal generating source.
8, location terminal according to claim 7, this location terminal feature are that described the 1st signal generating source is a gps satellite.
9, location terminal according to claim 7, this location terminal feature are that described the 2nd signal generating source is the base station that mobile radio communication is used.
10, location terminal according to claim 9, this location terminal feature is, described instrumentation unit is to be in the portable terminal that can receive well from the position of the signal of described the 1st signal generating source, the described position of instrumentation, described instrumentation unit (P) and the described moment (TR), and to the described position (P) and described moment (TR) of described control module proactive notification instrumentation.
11, location terminal according to claim 9, this location terminal feature is, described instrumentation unit is to be in the portable terminal that can receive well from the position of the signal of described the 1st signal generating source, described instrumentation unit comes the described position of instrumentation (P) and the described moment (TR) according to the request from described control module, and notifies described control module with the described position (P) and the described moment (TR) of instrumentation.
12, according to arbitrary described location terminal in the claim 7 to 11, this location terminal feature is that described the 2nd signal generating source is the television transmitting station.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP054021/2003 | 2003-02-28 | ||
| JP2003054021 | 2003-02-28 | ||
| JP31058/2004 | 2004-02-06 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100060704A Division CN1332217C (en) | 2003-02-28 | 2004-02-27 | Positioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101067652A true CN101067652A (en) | 2007-11-07 |
Family
ID=38880262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101268239A Pending CN101067652A (en) | 2003-02-28 | 2004-02-27 | Positioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101067652A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441439B (en) * | 2007-11-22 | 2010-12-22 | 精工爱普生株式会社 | Satellite signal reception device, timekeeping device |
| CN116152950A (en) * | 2022-12-28 | 2023-05-23 | 宁波高新区阶梯科技有限公司 | Data processing method, device and system, electronic equipment and storage medium |
-
2004
- 2004-02-27 CN CNA2007101268239A patent/CN101067652A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441439B (en) * | 2007-11-22 | 2010-12-22 | 精工爱普生株式会社 | Satellite signal reception device, timekeeping device |
| CN116152950A (en) * | 2022-12-28 | 2023-05-23 | 宁波高新区阶梯科技有限公司 | Data processing method, device and system, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1332217C (en) | Positioning system | |
| CN1210576C (en) | Method and apparatus for GPS assistance in a communication system | |
| KR101026286B1 (en) | Apparatus and method of position determination of a first mobile device using information from a second mobile device | |
| US7844281B2 (en) | Method and system for providing location information for emergency services | |
| KR100722350B1 (en) | Interface for gps system | |
| US7925278B2 (en) | Method and system for locating a wireless device in a wireless communication network | |
| AU757987B2 (en) | Method and system for aiding GPS receivers via a cellular or PCS network | |
| US7321776B2 (en) | Estimating GPS time at cellular terminals based on timing of information from base stations and satellites | |
| CN1606840A (en) | Base station time calibration using position measurement data sent by mobile stations during regular position location sessions | |
| US20030069033A1 (en) | Method and apparatus for wireless network timekeeping and synchronization | |
| JP2006504110A (en) | Method and apparatus for improving radio positioning accuracy | |
| KR20010041950A (en) | System and method for determining the position of a wireless cdma transceiver | |
| WO1995000821A1 (en) | Determination of location using time-synchronized cell site transmissions | |
| CN101390294A (en) | Base station synchronization using multi-communication mode user equipment | |
| MXPA06008384A (en) | Transfer of calibrated time information in a mobile terminal. | |
| CN1304493A (en) | Positioning device using cellular communication | |
| KR20070085543A (en) | Reporting satellite positioning system assistance integrity information in wireless communication networks | |
| CN1294708C (en) | Methods and apparatuses for using mobile GPS station to synchronize basestations | |
| KR20040073580A (en) | Provision of location information | |
| CN101067652A (en) | Positioning system | |
| US20120105282A1 (en) | Method And Apparatus For Determination Of The Positioning Of An Apparatus Or An User From Satellite Signaling | |
| WO2001075471A1 (en) | Locating a mobile unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071107 |