WO2001028275A1 - Location determination in telecommunication network - Google Patents
Location determination in telecommunication network Download PDFInfo
- Publication number
- WO2001028275A1 WO2001028275A1 PCT/FI2000/000892 FI0000892W WO0128275A1 WO 2001028275 A1 WO2001028275 A1 WO 2001028275A1 FI 0000892 W FI0000892 W FI 0000892W WO 0128275 A1 WO0128275 A1 WO 0128275A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- location
- measurement results
- mobile station
- distance parameter
- location data
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0244—Accuracy or reliability of position solution or of measurements contributing thereto
Definitions
- the invention relates to a method for supporting location determination of a mobile station in a telecommunication network particularly such that, in the method, location determination data are selectively stored.
- a typical mobile communication system covers a large geographical area and comprises a plurality of cells, each of the cells being generally served by one base station.
- the cells vary greatly in size, usually depending on the call traffic in the area. Cell size is generally smaller in areas with high traffic density than in regions where fewer calls are established. Regardless of the cell size, on many occasions it would be useful to know the geographical location or direction of travel of a mobile station.
- Location information on a mobile station can be used for many pur- poses. If desired, the user can determine his or her own location, call charging can be location-dependent or the location of a mobile station placing an emergency call can be determined so that help could be sent. For instance, vehicles may carry an arrangement for an automatic emergency call in case of an accident, the emergency call also comprising information on the vehicle's lo- cation.
- the distance of a mobile station from a base station with which the mobile station communicates can be measured on the basis of a signal propagation delay.
- GSM specification GSM 02.71
- WO 98/16078 WO 98/16078
- Inaccuracy in a location determined by one-point method can be several hundreds of me- ters, depending on the location measurement method. Consequently, when the mobile station moves in the vicinity of an oblong natural obstacle, it may be difficult to determine on which side of the obstacle the mobile station is located.
- the mobile station when the mobile station is located on one side of an oblong natural obstacle, such as a river, lake, park, hill or railway, it may happen that due to inaccuracy in the location measurement method it is not known, in case of traffic accident, on which side of the natural obstacle the emergency vehicle should be sent.
- an oblong natural obstacle such as a river, lake, park, hill or railway
- the object of the invention is to provide a method and equipment implementing the method such that the above problem can be solved. This is achieved by the method and system which are characterized by what is disclosed in the independent claims.
- the preferred embodiments of the invention are disclosed in the dependent claims.
- Two embodiments of the invention are described, in both of which embodiments specific location measurement results obtained at different locations at different time instants are stored in a memory element such that the location information to be stored is selected by means of at least one parameter either at the storing stage or later on.
- the parameters are character- ized in that they can be calculated from the measurement results and/or the time instants of the measurements.
- a location parameter is weighted more than a time instant parameter, and an aim is to delete measurement results corresponding to locations between which the mobile station has moved least.
- the first embodiment is based on the idea that a distance parameter can be determined for at least some of the stored location data and deletion of the location data can at least partly be based on said distance parameters.
- a second embodiment of the invention is based on an inventive idea similar to that of the first embodiment, but in this embodiment the time instant parameter is weighted more than the location parameter.
- the time instant parameter is weighted more than the location parameter.
- there are a plurality of measurement results of various ages in the memory but of the older measurement results a proportionally smaller number is stored than of the newer ones.
- an age parameter can be determined for at least some of the location parameters in the memory, and location data deletion can at least partly be based on said age parameters.
- the location measurement results of the mobile station can be interpreted better than before by using previously determined locations when interpreting data on a new, i.e. the most recent, location.
- measurement results are deleted on the basis of a timer.
- At least one stored location data estimate is deleted according to a predetermined mathematical function.
- An estimate refers to a measured location of the mobile station within the limits of accuracy of the measuring method.
- a primary advantage of the method and system of the invention and preferred embodiments and modifications thereof is that combination of consumption control of memory required for storing location determination data and accuracy in location history can be parameterized in a readily understandable form.
- a further advantage of the method and system of the invention and preferred embodiments thereof is more reliable location determination of a mobile station than what is achieved by current methods, in particular as regards natural obstacles. This is achieved by utilizing existing methods and location measurement processing according to the invention.
- Figure 1 illustrates a system to which the invention can be applied
- Figure 2 is a diagram illustrating signalling between a mobile station, a telecommunication network and a client
- Figure 3 shows some possible operations in a database for storing and deleting location measurement results
- Figure 4A shows how the location measurement results are stored and deleted according to one modification of the invention
- Figure 4B shows how the location measurement results are deleted according to one modification of the invention
- Figure 4C shows how the location measurement results are deleted according to one modification of the invention
- Figure 5 illustrates mathematical processing of the location measurements
- Figure 6 shows the location measurement results in R(t)-n coordinate system
- Figure 7 shows how the location measurement results are interpreted
- Figure 8 shows how the location measurement results are inter- preted.
- FIG 1 illustrates a system to which the invention can be applied.
- a mobile station MS is connected over a radio path to a public land mobile network PLMN via a base station BS.
- PLMN public land mobile network
- BS base station
- PSTN public switched telephone network PSTN, integrated services digital network ISDN, data network DN or the Internet (TCP/IP networks).
- PSTN public switched telephone network
- ISDN integrated services digital network
- DN data network DN
- IP networks the Internet
- GSM Global System for Mobile communications
- ETSI European Telecommunications Standards Institute
- the invention can also be applied to other telecommunication networks, such as NMT, AMPS, TACS, D-AMPS, DCS, JDS, CDMA, WCDMA, and/or to wireless data transmission, such as Mobile-IP (Internet-Protocol).
- an equipment capable of location measurement such as a GPS (Global Positioning System) receiver and a database, can be integrated in the mobile station, whereby no interactivity with the network is needed for measuring the location of the mobile station and storing the loca- tion data.
- GPS Global Positioning System
- Other, alternative locations of the location update equipment, database, server and client are also within the scope of the invention and the preferred embodiments thereof.
- Figure 2 shows a signalling diagram between a mobile station, a telecommunication network and a client.
- step 2-2 the location of the mobile station MS is measured and the measurement results are transmitted to the telecommunication network to be processed by the network.
- step 2-4 the measurement results to be stored, for instance the coordinates of GPS measurements, are transmitted to the database DB.
- step 2-6 When a client CLIENT inquires the mobile station's location, in step 2-6 the client transmits a request (REQ_C) to the server, wherefrom the request is forwarded to the database in step 2-8 (REQ_S).
- request REQ_C
- REQ_S the request is forwarded to the database in step 2-8
- location data are returned from the database BD to the server and they are forwarded, either as such or after processing, to the client CLIENT in step 2-12 (RES_C).
- REQ_C request
- REQ_S request forwarded to the database in step 2-8
- REQ_S location data are returned from the database BD to the server and they are forwarded, either as such or after processing, to the client CLIENT in step 2-12 (RES_C).
- the location of the mobile station can be inferred at the server, in a network element of the client or some other network element.
- the location of the mobile station can be inferred on the basis of the coordinates that were stored in the database prior to the client's request in step 2-6.
- Figure 4A illustrates how location measurement results are received and deleted according to an alternative modification of the invention.
- step 4- 2 the location of the mobile station is measured and the measured location data are transferred to the database DB in step 4-4. It is checked in step 4-6, whether the memory designated for one mobile station is full of location measurement results or not. If the memory is full, a deletion routine of stored location measurement results is started in step 4-8A. If the memory is not full, the latest measurement result is stored in step 4-20.
- Steps 4-6 and 4-8A can be referred to as a deletion step of old location measurement results, i.e. step 4-15A.
- Figures 4B and 4C show two other deletion steps according to other preferred modifications of the invention, namely steps 4-15B and 4-15C.
- steps 4-15B and 4-15C instead of checking whether the memory designated for one mobile station is full of location measurement results or not, alternatively, it is possible to delete a previously stored location measurement result prior to storing a new location measurement result. In this manner, it can be ensured that the database will not grow excessively in size. This is described by step 4-8B in Figure 4B.
- step 4-10 prior to storing the new location measurement result it is checked in step 4-10, whether a given time has elapsed from a previous deletion of at least one location measurement result or from a previous checking of the number of location meas- urement results, if yes, a deletion routine of the location measurement results is started in step 4-8C.
- n(R,) 0, if all location measurement data are deleted R a ⁇ _ de i eted -
- Deleting a measurement result need not be a separate step, but old measurement data can simply be deleted by writing a new data item in the same memory location.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60039525T DE60039525D1 (en) | 1999-10-15 | 2000-10-13 | RESIDENCE DETERMINATION IN A TELECOMMUNICATIONS SYSTEM |
US10/110,639 US7120449B1 (en) | 1999-10-15 | 2000-10-13 | Location determination in telecommunication network |
AU79265/00A AU7926500A (en) | 1999-10-15 | 2000-10-13 | Location determination in telecommunication network |
JP2001529699A JP3629238B2 (en) | 1999-10-15 | 2000-10-13 | Positioning in telecommunications networks |
BR0014709-5A BR0014709A (en) | 1999-10-15 | 2000-10-13 | Location measurement data management method, computer program that can be directly loaded into an internal memory of a digital computer, software product, and location measurement data management equipment |
EP00969593A EP1224826B1 (en) | 1999-10-15 | 2000-10-13 | Location determination in telecommunication network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI992236A FI19992236A (en) | 1999-10-15 | 1999-10-15 | Location determination in a telecommunications network |
FI19992236 | 1999-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001028275A1 true WO2001028275A1 (en) | 2001-04-19 |
Family
ID=8555461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2000/000892 WO2001028275A1 (en) | 1999-10-15 | 2000-10-13 | Location determination in telecommunication network |
Country Status (10)
Country | Link |
---|---|
US (1) | US7120449B1 (en) |
EP (1) | EP1224826B1 (en) |
JP (1) | JP3629238B2 (en) |
CN (1) | CN1149893C (en) |
AT (1) | ATE401755T1 (en) |
AU (1) | AU7926500A (en) |
BR (1) | BR0014709A (en) |
DE (1) | DE60039525D1 (en) |
FI (1) | FI19992236A (en) |
WO (1) | WO2001028275A1 (en) |
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CN101438270B (en) | 2004-10-29 | 2010-11-17 | 探空气球无线公司 | Method for constructing location beacon database and location beacon server |
US8369264B2 (en) | 2005-10-28 | 2013-02-05 | Skyhook Wireless, Inc. | Method and system for selecting and providing a relevant subset of Wi-Fi location information to a mobile client device so the client device may estimate its position with efficient utilization of resources |
US7747258B2 (en) * | 2005-02-04 | 2010-06-29 | Qualcomm Incorporated | Method and apparatus for performing position determination with pre-session action |
EP2503832B1 (en) | 2005-02-22 | 2019-08-21 | Skyhook Wireless, Inc. | Method for calculating the position of WiFi-enabled devices |
US20060247338A1 (en) * | 2005-05-02 | 2006-11-02 | General Electric Company | Poly(arylene ether) compositions with improved ultraviolet light stability, and related articles |
US8086232B2 (en) | 2005-06-28 | 2011-12-27 | Enterasys Networks, Inc. | Time synchronized wireless method and operations |
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JP2009545922A (en) * | 2006-08-04 | 2009-12-24 | スカイフック ワイヤレス,インク. | System and method for automatically extracting location information from a user device for use in a server system |
US7831785B2 (en) * | 2007-04-30 | 2010-11-09 | Hewlett-Packard Development Company, L.P. | Data collection management system and method |
CN102100058A (en) | 2008-06-06 | 2011-06-15 | 探空气球无线公司 | Method and system for determining location using a hybrid satellite and wlan positioning system by selecting the best wlan-ps solution |
US20090312036A1 (en) * | 2008-06-16 | 2009-12-17 | Skyhook Wireless, Inc. | Methods and systems for improving the accuracy of expected error estimation in location determinations using a hybrid cellular and wlan positioning system |
JP5036642B2 (en) * | 2008-06-30 | 2012-09-26 | 日本電信電話株式会社 | Network system and method for detecting position of wireless terminal in network system |
US8022877B2 (en) | 2009-07-16 | 2011-09-20 | Skyhook Wireless, Inc. | Systems and methods for using a satellite positioning system to detect moved WLAN access points |
US8063820B2 (en) | 2009-07-16 | 2011-11-22 | Skyhook Wireless, Inc. | Methods and systems for determining location using a hybrid satellite and WLAN positioning system by selecting the best SPS measurements |
US8638256B2 (en) | 2009-09-29 | 2014-01-28 | Skyhook Wireless, Inc. | Accuracy and performance of a hybrid positioning system |
US8279114B2 (en) | 2009-10-02 | 2012-10-02 | Skyhook Wireless, Inc. | Method of determining position in a hybrid positioning system using a dilution of precision metric |
WO2011156549A2 (en) | 2010-06-11 | 2011-12-15 | Skyhook Wireless, Inc. | Methods of and systems for measuring beacon stability of wireless access points |
US8606294B2 (en) | 2010-10-05 | 2013-12-10 | Skyhook Wireless, Inc. | Method of and system for estimating temporal demographics of mobile users |
KR101972606B1 (en) | 2010-11-03 | 2019-04-25 | 스카이후크 와이어리스, 인크. | Method of system for increasing the reliability and accuracy of location estimation in a hybrid positioning system |
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EP2563060B1 (en) | 2011-08-24 | 2016-06-29 | Telefonaktiebolaget LM Ericsson (publ) | Method of adapting the parameter set of a mobile terminal transceiver based upon its geographical position |
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CN108028778B (en) | 2015-07-22 | 2021-06-18 | 动态网络服务股份有限公司 | Method, system and apparatus for generating information transmission performance warning |
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- 2000-10-13 US US10/110,639 patent/US7120449B1/en not_active Expired - Lifetime
- 2000-10-13 EP EP00969593A patent/EP1224826B1/en not_active Expired - Lifetime
- 2000-10-13 JP JP2001529699A patent/JP3629238B2/en not_active Expired - Fee Related
- 2000-10-13 DE DE60039525T patent/DE60039525D1/en not_active Expired - Lifetime
- 2000-10-13 AT AT00969593T patent/ATE401755T1/en not_active IP Right Cessation
- 2000-10-13 WO PCT/FI2000/000892 patent/WO2001028275A1/en active IP Right Grant
- 2000-10-13 BR BR0014709-5A patent/BR0014709A/en not_active IP Right Cessation
- 2000-10-13 AU AU79265/00A patent/AU7926500A/en not_active Abandoned
- 2000-10-13 CN CNB008142815A patent/CN1149893C/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
EP1224826B1 (en) | 2008-07-16 |
CN1149893C (en) | 2004-05-12 |
US7120449B1 (en) | 2006-10-10 |
EP1224826A1 (en) | 2002-07-24 |
CN1379964A (en) | 2002-11-13 |
ATE401755T1 (en) | 2008-08-15 |
FI19992236A (en) | 2001-04-16 |
JP3629238B2 (en) | 2005-03-16 |
AU7926500A (en) | 2001-04-23 |
DE60039525D1 (en) | 2008-08-28 |
BR0014709A (en) | 2002-06-18 |
JP2003511678A (en) | 2003-03-25 |
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