WO2002011417A1 - Systeme et procede de communication, a un poste de commande, de la localisation d'un appel d'urgence, par le biais d'un reseau telephonique - Google Patents

Systeme et procede de communication, a un poste de commande, de la localisation d'un appel d'urgence, par le biais d'un reseau telephonique Download PDF

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Publication number
WO2002011417A1
WO2002011417A1 PCT/US2000/021307 US0021307W WO0211417A1 WO 2002011417 A1 WO2002011417 A1 WO 2002011417A1 US 0021307 W US0021307 W US 0021307W WO 0211417 A1 WO0211417 A1 WO 0211417A1
Authority
WO
WIPO (PCT)
Prior art keywords
position data
mobile telephone
telephone set
location
control station
Prior art date
Application number
PCT/US2000/021307
Other languages
English (en)
Inventor
Mohamad Ayoub
Ahmad Lamah
Original Assignee
Mohamad Ayoub
Ahmad Lamah
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mohamad Ayoub, Ahmad Lamah filed Critical Mohamad Ayoub
Priority to PCT/US2000/021307 priority Critical patent/WO2002011417A1/fr
Priority to AU2000266213A priority patent/AU2000266213A1/en
Publication of WO2002011417A1 publication Critical patent/WO2002011417A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • 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
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • 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
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/006—Transmission of position information to remote stations for emergency situations
    • 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
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/008—Transmission of position information to remote stations using a mobile telephone network

Definitions

  • the invention refers to a system and to a method for communicating the location of an emergency caller from a mobile telephone set through a telephone network to a control station which is handling the emergency call in which position data corresponding to the location of the mobile telephone set is obtained and transformed into a format to be transmitted to the control station.
  • European patent application no. EP-A1 -0, 897, 1 19 teaches a cellular transmitter for automatically providing position location and emergency.
  • the mobile telephone set comprises a GPS positioning device to provide the coordinates of the caller.
  • a stored telephone number is transmitted to the switching office together with the position data.
  • a system for communicating the position of a mobile object having a cellular transceiver is disclosed.
  • the position data is transformed into one or more of a multitude of assigned telephone numbers.
  • the telephone numbers represent the location information to be transmitted to a switch using the "callback" or “direct inward dialing (DID) " service .
  • the transmission of each DID is accomplished during the handshake when the calling telephone set is setting up the communication link to the switch as long as the connection is not yet fully established, which means that the switch is still "on hook” .
  • a set of DID telephone numbers is obtained from the telephone network operator on a rental basis for a fixed, e.g . monthly, fee.
  • the object of the invention is to provide a system for communicating the location of an emergency caller from a mobile telephone set through a telephone network to a control station handling the emergency call which can be easily implemented .
  • Another object of the invention is to provide a respective method for com municating the location of an emergency caller.
  • a system for communicating the location of an emergency caller through a telephone network to a control station for handling the emergency call comprising a mobile telephone set; a location detection unit arranged in said mobile telephone set for obtaining position data of the location of said mobile telephone set; a transforming unit arranged in said mobile telephone set and cou pled to said location detection unit for receiving said position data and for transforming said position data into a set of audio tones representing said position data; and a transceiving unit arranged in said mobile telephone set for transmitting said audio tones representing said position data through said telephone network when a call connection between said mobile telephone set and said control station is established;
  • a system for communicating the location of an emergency caller through a telephone network to a control station for handling the em ergency call comprising a mobile telephone set; a location detection unit arranged in said mobile telephone set for obtaining position data of the location of said mobile telephone set; a transforming unit arranged in said mobile telephone set and coupled to said location detection unit for receiving said position data and for transforming said position data into one of a multitude of assigned telephone numbers representing said position data; and a transceiving unit arranged in said mobile telephone set for transmitting said one of said assigned telephone numbers through said telephone network when a call connection between said mobile telephone set and said control station is being set up.
  • the foregoing object is solved by a method for communicating the location of an emergency caller from a mobile telephone set through a telephone network to a control station handling the emergency call comprising the steps of obtaining position data of the location of said mobile telephone set; transforming said position data into a set of audio tones representing said position data; and transmitting said audio tones representing said position data through said telephone network when a call connection between said mobile telephone set and said control station is established;
  • a method for communicating the location of an emergency caller from a mobile telephone set through a telephone network to a control station handling the emergency call comprising the steps of : obtaining position data of the location of said mobile telephone set; transforming said position data into one of a multitude of assigned telephone numbers representing said position data; and transmitting said one of said assigned telephone numbers throug h said telephone network when a call connection between said mobile telephone set and said control station is being set up.
  • the position data is translated into a set of DTMF tones .
  • Each digit of the latitude and longitude of the obtained location of the mobile telephone set is converted into a DTMF tone.
  • the tone is transmitted to the emergency authority, e .g. police station, while the call is in progress.
  • the emergency authority e .g. police station
  • the stream of tones can be heard .
  • the duration of the stream of tones is relatively short so that the interference with the voice call connection can be neglected.
  • the location can be captured at repetitive intervals and updated during the call connection through respective transmission of DTMF tone sequences .
  • the receiving device located at the emergency authority requires a tone decoder that retrieves the DTMF sequence during the emergency call and translates it back to location information in the form of longitude and latitude.
  • the location is transmitted during the handshake or setup phase of the emergency call connection .
  • the calling party presses an emergency button or sequence of buttons, e.g. 91 1 in the U .S . or a corresponding number in other countries
  • the location of the mobile telephone set is captured and translated into a telephone number format which is then transmitted to a switch of the network operating company,
  • the telephone numbers are DIDs .
  • the switch recognizes the DID number as being reserved for an emergency call. As the DID number corresponds to a location, the emergency call can be routed to the responsible local emergency authority,
  • An individual DI D corresponds to a predetermined area portion, all areas covering a continuous area of possible locations where emergency service is offered .
  • An entire country can be covered by several of such continuous areas all using the same set of DI D telephone numbers in parallel .
  • the numbers are known to the central office switch which distributes the emergency call to the next local emergency authority according to the stored assignment.
  • a set of 5,000 DIDs with each DID assigned to an area of 5 km ⁇ covers a continuous area of 25,000 m2. Dividing the U .S. into areas of 25 ,000 kr ⁇ )2 all having the same set of DIDs the whole country can be served .
  • an identification number which is uniquely identifying the cell tower that governs the communication with the mobile telephone set can be tra nsmitted to the central office switch in addition to the DI D .
  • a set of about 2, 000 D I Ds is sufficient to provide an accuracy of the location information which is even better than the federal regulation requirement.
  • an automatic location identification (ALI) system receiving the location information maps the location into environmental data stored at the AL I system . This data is sent to the emergency authority and d isplayed in order to facilitate handling of the emergency call .
  • ALI automatic location identification
  • the location information can be obtained in any known way.
  • a satellite based positioning system like Global Positioning System (GPS) is arranged in the mobile telephone set which obtains longitude and latitude of the current location of the calling party.
  • GPS Global Positioning System
  • a known cellular triangulation method can be used or the position of the mobile telephone set can be derived from the position of the cell tower.
  • the invention combines already known techniques as DTMF tone generation and decoding, direct inward dialing, ALI to provide an emergency call system based on mobile phones thereby enabling a cost efficient implementation of the system .
  • Figure 1 schematically shows a cellular network according to the first alternative of the invention
  • Figure 2 schematically shows a cellular network according to the second alternative of the invention.
  • Figure 3 shows an example of an continuous area divided up into 30 area portions each assigned with a DID telephone number.
  • the system in figure 1 shows a mobile telephone set 1 , e.g . a cellular phone, a cellular telephone network 2 comprising a cell tower 21 and a mobile telephone switch office (MTSO) 22, and an emergency authority 3, e.g . a police station .
  • the mobile phone 1 has a built in means for obtaining its position .
  • the means for obtaining a position is a receiver of a satellite based positioning system like Global Positioning System (G PS), satellites 1 0 being shown in the figure. But any other system of locating the cellular phone like triangulation would apply.
  • G PS Global Positioning System
  • the GPS receiver comprises a GPS antenna 1 1 which feeds the received signals from the satellites into a GPS module 1 2 calculating the position of the mobile telephone resulting in a data item for longitude and latitude, resp.
  • the position data is acquired repetitively in constant time intervals, e.g. every five minutes, and is stored in a controller 1 3 together with a time stamp representing the time of position acquisition ,
  • a transceiver 1 5 When an emergency call is requested from handset module 1 4 by pressing 91 1 on the keypad or pressing a dedicated panic button, a transceiver 1 5 generates the emergency call and communicates via an antenna 1 6 through the cellular network to the authority 4.
  • the position is translated into audio tones which are transmitted through the voice channel of the telephone call connection .
  • the audio tones uniquely represent longitude and latitude of the last captured position .
  • the tones are generated by controller 1 3 and transmitted trough transceiver 1 5.
  • the stream of tones may be of any coding.
  • the longitude and latitude are translated into a sequence of tones according to a dual tone multifrequency standard (DTMF) where a tone of a predetermined frequency corresponds to one digit.
  • DTMF dual tone multifrequency standard
  • the tones are sent via the voice channel so that they ca n be heard by the caller. Since the stream of tones is rather short, the call connection is not disturbed significantly. Alternatively, the tones can be sent th rough the control channel during the setup of the call connection .
  • the switching office 22 receives the emergency call and passes it through to the emergency authority 3 along with the string of DTMF tones.
  • the receiving equipment in the authority has a modem 31 and a tone detector 32 which extracts the DTMF tones and translates them back into digits which represent longitude and latitude of the position of the cellular phone 1 .
  • the DTMF tone detector and decoder 32 is connected to the computer of the telephone system of the authority 3.
  • the controller 1 3 in the cellular phone 1 sends the updated position at the constant interval while the emergency call is in progress.
  • the position is acquired using the GPS system .
  • the position can be obtained in either known manner.
  • Methods for obtaining the position applicable in the invention are cellular triangulation or a method using position data obtained from the cell towers the cellular phone is communicating with in order to fixate the location of the 91 1 caller. With either method, the position is translated into a stream of DTMF tones that represent longitude and latitude which are sent to the authority 3 while the voice call connection is in progress ,
  • the position data received from the DTMF decoder 32 is sent to a database processing facility 33 that combines the position data with data representing the environment of the position, like an automatic location identification (ALI ) system .
  • the database uses the position data and generates mapping information like street names, bridges, intersections, highways etc .
  • the location of the caller can be displayed on a computer screen together with the mapping information .
  • Most of the 91 1 dispatch offices or the police facilities are linked to an ALI system .
  • the components of the cellular phone 1 of figure 2 correspond to the respective components of cellular phone 1 shown in figure 1 .
  • an emergency 9 1 1 call is made from cellular phone 1
  • its built-in GPS module acquires its position.
  • the obtained position in the form of longitude and latitude is converted into a signal to be transmitted through the cellular network 2 to the emergency authority 3, e.g . a police station .
  • the system of figure 2 uses a phone number format for the position data .
  • the phone numbers are telephone numbers according to the DID features which are used for sending calls only. They do not receive incoming calls, A set of DI D numbers is obtained on a rental basis on a fixed fee.
  • the DI Ds are assigned by the North American Dialing Plan Commission to any phone company that meets certain criteria and regulatory issues .
  • the cellular phone Upon activation of the emergency call by typing 91 1 on the keypad of the handset or by pressing a panic button, the cellular phone generates the DI D number that corresponds to the position obtained from the GPS module.
  • the DID numbers are evaluated by the receiving equipment during the setup phase of the call, before a telephone call connection is fully established .
  • the cell tower 21 passes the DID number to the mobile telephone switch office (MTSO) 22.
  • the MTSO has a built-in database which contains all DID numbers that can represent a 91 1 call .
  • the MTSO registers the call and passes it to the central office (CO) 23.
  • the central office notices from its built-in database that the received DID represents a 91 1 call.
  • the central office saves the DID and passes the call to a controller 24 which is able to perform automatic number identification (AND and/or evaluate the mobile identification number (MIN) ,
  • the controller 24 passes the call to the emergency authority 3, e.g. a police station .
  • the DID represents the location of the caller
  • the MTSO, the CO and the ANI/MIN controller are able to pass the call to the proper 91 1 station 3 that is nearest to the emergency location and that can manage the emergency case best.
  • the controller 24 passes the call and the DID number to a database processing facility 3 1 that combines the position data with data representing the information like street names, bridges, intersections, highways etc.
  • the location of the caller can be displayed on a computer screen together with the mapping information .
  • Most of the 91 1 dispatch offices or the police facilities are linked to an ALI system.
  • the information from the ALI system is sent to the 91 1 dispatch office 3 at their request.
  • the dispatch office 3 can locate the emergency call and activate the ..proper authority to help the caller.
  • Each DID number represents an associated area portion of a predetermined, prefera bly equal size. As an example, figure 3 shows 30 areas, each associated to a different DID 1 ...30.
  • the controller 1 3 in the cellular phone 1 determines that the location of the caller is in a specific area (e .g. area 40), it translates the position data obtained in the form of longitude and latitude into the DID telephone number associated to that area portion (e.g . D ID 1 6) .
  • Each one of said area portions is located adjacently to another one of said a rea portions so that all area portions form a continuous area 41 of possible locations for the mobile telephone set.
  • the area portion represented by one DID telephone num ber is 5 km 2 .
  • the multitude of 5,000 DIDs can cover an continuous area of 25 ,000 km 2 which is almost the size of the state of New Jersey in the U . S.
  • the controller 1 3 of the cellular phone 1 When an emergency call is made by a caller located in area 40, the controller 1 3 of the cellular phone 1 generates the associated DID 1 6 for area 40 and sends it to the cellular transceiver 1 6.
  • the same set of DIDs can be used for each contin uous area.
  • the US is divided into continuous areas of 25,000 km 2 , each being composed of 5,000 area portions of 5,000 km 2 associated with an individual DID.
  • an emergency call is initiated, it is routed to the nearest 91 1 dispatch office via the central office.
  • the 5,000 DI Ds are stored in the database in each central office in the country.
  • any central office receives one of the 5,000 DIDs, it sends it to the nearest 9 1 1 dispatch office.
  • the 91 1 dispatch office is linked to the AL I system where all 5 ,000 DIDs are represented by their locations.
  • each continuous area mapped into the set of DIDs is referenced to a cell tower the mobile phone is communicating with .
  • Each cell tower has its unique identification number (ID) .
  • ID can be its longitude and latitude of position.
  • the GPS receiver or any other means of locating the cellular phone like triangulation obtains the position of the cellular phone and converts it into the DI D that is associated to the area portion the cellular phone is located in.
  • This DID is combined with the cell tower ID the cellular phone is communicating with.
  • the combination of DID and cell tower ID is passed to the 91 1 dispatcher. For different cell towers the same set of DIDs can be used .
  • a cell tower may cover an area of 1 ,000 square miles , In this embodiment, an area portion of 1 /2 square mile is associated with an individual DID .
  • a set of 2 ,000 DI Ds is sufficient to achieve enough accuracy of the locations in the area that is covered by a cell tower.
  • the transmitted location information has an accuracy of less than 1 25 meters using root-mean-square according to the FCC mandate.
  • an entire emergency service based on cellular phones can be provided using 2,000 DI Ds within the cover area of the cellular network.

Abstract

Ce système et ce procédé de communication de la localisation d'un appel d'urgence, par le biais d'un réseau téléphonique, mettent en oeuvre un combiné téléphonique mobile (1) comportant une unité de détection d'emplacement (12). Les données de position sont traduites en un flux de tonalités audio, à émettre pendant que s'effectue la connexion d'appel. Selon un autre mode de réalisation, les données de position sont traduites dans l'un des nombreux numéros de téléphones assignés, à émettre pendant la phase de démarrage de la connexion d'appel. Les numéros de téléphone peuvent être combinés à l'identification de la tour cellulaire (21) avec laquelle le téléphone cellulaire (1) est en train de communiquer. L'invention combine des techniques classiques permettant la mise en oeuvre d'un service d'appels d'urgence, cellulaire, économique.
PCT/US2000/021307 2000-08-02 2000-08-02 Systeme et procede de communication, a un poste de commande, de la localisation d'un appel d'urgence, par le biais d'un reseau telephonique WO2002011417A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2000/021307 WO2002011417A1 (fr) 2000-08-02 2000-08-02 Systeme et procede de communication, a un poste de commande, de la localisation d'un appel d'urgence, par le biais d'un reseau telephonique
AU2000266213A AU2000266213A1 (en) 2000-08-02 2000-08-02 System and method for communicating the location of an emergency caller through a telephone network to a control station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/021307 WO2002011417A1 (fr) 2000-08-02 2000-08-02 Systeme et procede de communication, a un poste de commande, de la localisation d'un appel d'urgence, par le biais d'un reseau telephonique

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017393A1 (de) * 2005-04-14 2006-10-19 T-Mobile International Ag & Co. Kg Verfahren und Vorrichtung zur Synchronisation von Sprache und Daten über Lokalisierungsinformationen für ortsbezogene Dienste
GB2530065A (en) * 2014-09-11 2016-03-16 Michael Keating A System for Processing Emergency Services Calls

Citations (4)

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Publication number Priority date Publication date Assignee Title
US5835907A (en) * 1995-12-20 1998-11-10 Mci Communications Corporation Emergency PCS system for identification and notification of a subscriber's location
US5873040A (en) * 1996-08-13 1999-02-16 International Business Machines Corporation Wireless 911 emergency location
US5890068A (en) * 1996-10-03 1999-03-30 Cell-Loc Inc. Wireless location system
US6085097A (en) * 1998-02-12 2000-07-04 Savery; Winsor T. Cellular communications tracking system using a multitude of assigned call-numbers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5835907A (en) * 1995-12-20 1998-11-10 Mci Communications Corporation Emergency PCS system for identification and notification of a subscriber's location
US5873040A (en) * 1996-08-13 1999-02-16 International Business Machines Corporation Wireless 911 emergency location
US5890068A (en) * 1996-10-03 1999-03-30 Cell-Loc Inc. Wireless location system
US6085097A (en) * 1998-02-12 2000-07-04 Savery; Winsor T. Cellular communications tracking system using a multitude of assigned call-numbers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017393A1 (de) * 2005-04-14 2006-10-19 T-Mobile International Ag & Co. Kg Verfahren und Vorrichtung zur Synchronisation von Sprache und Daten über Lokalisierungsinformationen für ortsbezogene Dienste
US9185535B2 (en) 2005-04-14 2015-11-10 Deutsche Telekom Ag Method and device for synchronization of speech and data concerning location information for location-related services
GB2530065A (en) * 2014-09-11 2016-03-16 Michael Keating A System for Processing Emergency Services Calls

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