CN1112832C - Mobile terminal self-positioning method - Google Patents
Mobile terminal self-positioning method Download PDFInfo
- Publication number
- CN1112832C CN1112832C CN 99117670 CN99117670A CN1112832C CN 1112832 C CN1112832 C CN 1112832C CN 99117670 CN99117670 CN 99117670 CN 99117670 A CN99117670 A CN 99117670A CN 1112832 C CN1112832 C CN 1112832C
- Authority
- CN
- China
- Prior art keywords
- base station
- mobile terminal
- location
- terminal self
- portable terminal
- 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.)
- Expired - Fee Related
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- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a mobile terminal self-positioning method which comprises the following steps: the base station codes, the latitudes, the longitudes and the equivalent transmitting power values (Pi) of the CO carriers of each present base station and adjacent base station are broadcast by each base station (BSS), and each equivalent transmitting power value (Pi) is obtained by the subtraction of the sum of the transmitting power of a CO carrier of each base station and antenna gain and the loss of a mixer and a feed line; a mobile terminal can calculate the distance of the mobile terminal from each base station by the measured base station code, the measured latitude, the measured longitude and the measured equivalent transmitting power value (Pi) of the CO carrier of each base station, and the received the power value (Li) of the CO carrier transmitted by each base station according to a transmission model of a wireless channel, and therefore, the position of the mobile terminal is determined.
Description
The invention belongs to field of mobile communication, the method that a kind of portable terminal of more specifically saying so (mobile phone, Vehicle mounted station etc.) is located voluntarily.
Development along with mobile communication, use the mobile communications tool person more and more, the portable terminal user needs to determine own residing position under many situations, arrived unfamiliar place as the portable terminal user, when taking place, emergency wishes to know own residing position, so that inform other people.The portable terminal location technology can be determined position and the travel direction and the movement velocity of moving body sometime.Mobile terminal locations determine to be applied to the enterprising driving of a Vehicle mounted station scheduling; Be applied to the cellphone subscriber and determine cellphone subscriber's geographical position or help mobile network optimization, by the position of determining to search by the web help cellphone subscriber buildings such as near hotel or shop of mobile phone location.Now general Vehicle mounted station location is adopted the GPS assist location usually, and utilization is installed the GPS receiving equipment additional and received the geographical position that network comes together to determine Vehicle mounted station with the fixing GPS in ground then on each Vehicle mounted station.At present, do not see any disclosed technical data as yet about in mobile communication system, portable terminal being positioned.
The method that the purpose of this invention is to provide a kind of mobile terminal self location, the method in according to the present invention, the user of portable terminal can determine the position at own place at any time.
The object of the present invention is achieved like this: each base station BS S broadcasts the equivalent transmission power level Pi of base station code, longitude and latitude and the C0 carrier wave of each base station and adjacent base station, and described equivalent transmission power level Pi is meant that the transmitting power and the antenna gain sum of the C0 carrier wave of base station deduct mixer and feeder loss.The performance number Li of the C0 carrier wave of the equivalent transmission power level Pi of the base station code of each base station that the portable terminal utilization measures, longitude and latitude and C0 carrier wave and each base station that receives, according to the wireless channel mode, adopt the method for square error minimum, just can calculate the distance of portable terminal, thereby determine the position of portable terminal apart from each base station.
Utilize the method among the present invention, convergence rate is very fast, and precision is higher, can position portable terminal at any time.
Describe the present invention below in conjunction with accompanying drawing.
Fig. 1 is mobile terminal self Positioning Principle figure among the present invention.
In Fig. 1, Bi (i=1,2 ... n) expression and the nearest several base stations of portable terminal, n generally gets 3 to 8, in one embodiment of the invention, gets n=4; (Xi Yi) represents the longitude and latitude of each base station, and A represents the residing position of portable terminal, and Ri represents the portable terminal that calculates according to the wireless channel mode distance to each base station.Each base station BS S utilizes the equivalent transmission power level Pi of base station code, longitude and latitude and the C0 carrier wave of each base station of CBCH channel radio and adjacent base station, and portable terminal is received above-mentioned information and is stored in the portable terminal.When portable terminal is in a certain position, can receive the received power value Li of the C0 carrier wave that sends nearest several base stations,, utilize following formula can calculate the distance R i of portable terminal and each base station according to the wireless channel mode:
A, b are constant in LogRi=a (Pi-Li)+b formula, and its span is 0.01＜a＜1 and-10＜b＜-1, in specific embodiment, gets a=0.026, b=-3.49.
If Ri is the accurate distance of portable terminal apart from each base station, then four circles among Fig. 1 should meet at a bit, but because the unsteadiness of radio propagation conditions, even the position of portable terminal is fixed, the Ri that it is measured also has fluctuating, in the ordinary course of things, four circles and non-intersect are so can't obtain the position of portable terminal with the method for solving an equation.
The present invention has adopted the minimum method of square error to solve this problem, the difference between the actual range that promptly utilizes portable terminal and each base station and the basis distance R i that measures square hour, think that the position of measuring at this moment promptly is the position of portable terminal.The square error formula is:
The E=∑ [(X-Xi)
2+ (Y-Yi)
2-Ri
2]
2When square error E is during less than certain value, this moment (X Y) can think the longitude and latitude of portable terminal, i.e. the position of portable terminal.
Determine (X, Y) concrete grammar and step are as follows:
1, get (X, initial value Y) is:
X
0＝(∑Xi)/n
Y
0＝(∑Yi)/n
2, ask X with following formula, the variable quantity of Y
dX＝-c*∑{[(X-Xi)
2+(Y-Yi)
2-Ri
2]*(X-Xi)}
The dY=-c* ∑ { [(X-Xi)
2+ (Y-Yi)
2-Ri
2] * (Y-Yi) wherein, c is a constant, desirable 0.001.
3, ask variable quantity with iterative method
X
k+1＝X
k+dX；Y
k+1＝Y
k+dY；
4, calculate dE=E (X
K+1, Y
K+1)-E (X
k, Y
k), if dE during less than certain precision value M, (X Y), promptly exports the longitude and latitude of the position of portable terminal, otherwise jumps to 2 in output.According to the required precision difference, the desirable 0.000001＜M of accuracy value M＜0.01 in specific embodiment, is got M＜0.01, as is got M=0.001.
Claims (9)
1, the method for mobile terminal self location, it is characterized in that, comprise following rapid: (1) each base station Bi, i=1,2, ... .n broadcast each base station and adjacent base station base station code, longitude and latitude (Xi, Yi) and the equivalent transmission power level Pi of C0 carrier wave, described equivalent transmission power level Pi is meant that the transmitting power and the antenna gain sum of the C0 carrier wave of base station deduct mixer and feeder loss; (2) portable terminal measure each base station broadcast base station code, longitude and latitude and C0 carrier wave equivalent transmission power level Pi and be stored in the portable terminal; (3) portable terminal receives the received power value Li of the C0 carrier wave of each base station, according to the wireless channel mode, calculates the distance R i of portable terminal apart from each base station by following formula:
LogRi=a (Pi-Li)+b a, b is constant; Get (4) that (X, initial value Y) is: X
0=(∑ Xi)/n Y
0=(∑ Yi)/n; (5) get the variable quantity of X, Y
dX＝-c*∑{[(X-Xi)
2+(Y-Yi)
2-Ri
2]*(X-Xi)}
dY＝-c*∑{[(X-Xi)
2+(Y-Yi)
2-Ri
2]*(Y-Yi)}
Wherein, c is a constant; (6) ask variable quantity with iterative method
X
K+1=X
k+ dX; Y
K+1=Y
k+ dY; (7) [(X-Xi) according to square error formula E=∑
2+ (Y-Yi)
2-Ri
2]
2Calculate
DE=E (X
K+1, Y
K+1)-E (X
k, Y
k); (8) if dE during less than accuracy value M, (X, Y), promptly portable terminal shows the longitude and latitude of position, otherwise jumps to (5) in output.
2, the method for the described mobile terminal self of claim 1 location is characterized in that: described each base station Bi, and i=1,2 ... the base station among the n is counted n and is: 3≤n≤8.
3, the method for the described mobile terminal self of claim 2 location is characterized in that: get the base station and count n=4.
4, the method for the described mobile terminal self of claim 1 location, it is characterized in that: described each base station Bi, i=1,2 ... n broadcasts the equivalent transmission power level Pi of base station code, longitude and latitude and C0 carrier wave of each base station and adjacent base station by the CBCH channel radio.
5, the method for the described mobile terminal self of claim 1 location, it is characterized in that: the span of a, b among described formula LogRi=a (Pi-Li)+b is
0.01＜a＜1 and-10＜b＜-1.
6, the method for the described mobile terminal self of claim 5 location, it is characterized in that: described normal a, b are
a＝0.026 b＝-3.49。
7, the method for the described mobile terminal self of claim 5 location is characterized in that: the formula of the variable quantity of the described X of getting, Y
dX＝-c*∑{[(X-Xi)
2+(Y-Yi)
2-Ri
2]*(X-Xi)}
The dY=-c* ∑ { [(X-Xi)
2+ (Y-Yi)
2-Ri
2] constant c=0.001 among the * (Y-Yi).
8, the method for the described mobile terminal self of claim 1 location, it is characterized in that: described dE less than the span of accuracy value M among the accuracy value M is
0.000001＜M＜0.01。
9, the method for the described mobile terminal self of claim 7 location is characterized in that: described accuracy value M=0.001.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117670 CN1112832C (en) | 1999-08-12 | 1999-08-12 | Mobile terminal self-positioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117670 CN1112832C (en) | 1999-08-12 | 1999-08-12 | Mobile terminal self-positioning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1284830A CN1284830A (en) | 2001-02-21 |
| CN1112832C true CN1112832C (en) | 2003-06-25 |
Family
ID=5280205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99117670 Expired - Fee Related CN1112832C (en) | 1999-08-12 | 1999-08-12 | Mobile terminal self-positioning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1112832C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE524493C2 (en) | 2002-02-25 | 2004-08-17 | Telia Ab | Estimator and method for determining the position of a mobile station in a mobile communication system |
| CN1312869C (en) * | 2003-12-19 | 2007-04-25 | 中兴通讯股份有限公司 | Method for measuring radio communication system propagation delay |
| US7522940B2 (en) * | 2004-11-16 | 2009-04-21 | Sony Ericsson Mobile Communications Ab | Methods and mobile terminals for display of mobile terminal density information |
| US7715852B2 (en) * | 2006-01-06 | 2010-05-11 | Mediatek Inc. | Location estimation method |
| KR20080027564A (en) * | 2006-09-25 | 2008-03-28 | 삼성전자주식회사 | Mobile communication terminal for providing position information and method thereof |
| CN101398476B (en) * | 2007-09-29 | 2011-07-27 | 广达电脑股份有限公司 | Positioning system |
| CN101986747A (en) * | 2010-10-14 | 2011-03-16 | 北京拓明科技有限公司 | Mobile terminal positioning method |
| CN102076003B (en) * | 2010-12-13 | 2014-01-29 | 北京邮电大学 | Locating demodulation chip for mobile broadcasting signal |
| CN102547975A (en) * | 2010-12-28 | 2012-07-04 | 上海贝尔股份有限公司 | Method and device for locating mobile station based on received powers of reference signals |
| CN103369668B (en) * | 2012-03-27 | 2016-12-07 | 中兴通讯股份有限公司 | Wireless communication system is utilized to carry out the method for location positioning, device and mobile terminal |
| EP4276488A3 (en) | 2017-06-14 | 2024-01-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus, system and method for improving position estimation |
| CN111239681A (en) * | 2020-02-14 | 2020-06-05 | 深圳空循环科技有限公司 | Positioning method and device and electronic equipment |
-
1999
- 1999-08-12 CN CN 99117670 patent/CN1112832C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1284830A (en) | 2001-02-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZTE CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHENZHENG CITY ZTE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518057 Zhongxing building, science and technology south road, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee after: ZTE Corporation Address before: 518057 Zhongxing building, hi tech Industrial Park, Shenzhen, Guangdong, Nanshan District Province, Cao Jianjun Patentee before: Zhongxing Communication Co., Ltd., Shenzhen City |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030625 Termination date: 20130812 |