WO1997050002A1 - Location determination in a communication system - Google Patents
Location determination in a communication system Download PDFInfo
- Publication number
- WO1997050002A1 WO1997050002A1 PCT/US1997/003406 US9703406W WO9750002A1 WO 1997050002 A1 WO1997050002 A1 WO 1997050002A1 US 9703406 W US9703406 W US 9703406W WO 9750002 A1 WO9750002 A1 WO 9750002A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- location
- user
- type
- service
- grid reference
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3605—Destination input or retrieval
- G01C21/3608—Destination input or retrieval using speech input, e.g. using speech recognition
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/3629—Guidance using speech or audio output, e.g. text-to-speech
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
-
- 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
- This invention relates to communication services, including but not limited to providing location-based services to wireline and wireless users.
- Various navigation systems exist, including systems having artificial intelligence that use routing algorithms and display maps to help a person navigate to where they want to go from a current location. Some of these systems also provide voice output to aid the driver when the vehicle is in motion. Some systems use satellite signalling and other external sensors to determine the location of the vehicle with respect to a map present in the vehicle location system within the vehicle. Such systems, however, are not accurate in determining where precisely the vehicle is located, sometimes missing by thousands of feet. In addition, these systems can be very expensive, are not readily available in rental cars, nor are portable units for pedestrians readily available.
- a person does not know their present location while on foot or in a rental car without a vehicle navigation system, the person is limited to the option of asking someone in the area for information and relying on the accuracy of the information received.
- a person is able to find a wireline telephone, such systems have the capability of identifying the location of the telephone, and hence the location of the individual, through known tracing techniques. These systems are not, however, capable of providing further assistance such as directions from a present location to a desired location unless, for example, the operator in the telephone system happens to know what the user desires.
- Such a system is not provided for cellular telephone customers, who typically roam over large geographic areas and whose location can best be determined as within a particular cell.
- Known techniques for particularly locating wireless users such as cellular users or other radio frequency (RF) users, are expensive and inaccurate to the degree generally required by someone needing location-based assistance.
- RF radio frequency
- FIG. 1 is a block diagram of a communication system in accordance with the invention.
- FIG. 2 is a flowchart describing location determination in accordance with the invention.
- FIG. 3 is a flowchart showing a method of dialoging between a location server 109 and a user with a communication unit in accordance with the invention.
- FIG. 4 is a flowchart showing a method of method for determining a street address in accordance with the invention.
- FIG. 5 is a flowchart showing a method of determining directions from a starting location to a desired location in accordance with the invention.
- FIG. 6 is a flowchart showing a method of handling a request for emergency assistance in accordance with the invention.
- the following describes an apparatus for and method of aiding users in determining their present geographic location and in providing directions and/or other geographic information.
- the present invention provides a server that assists in obtaining a provider for the assistance.
- the present invention proposes combining speech recognition, speech synthesis, and location determination techniques to provide a service to wireless and wireline users who do not know where they are, do not know how to get to where they would like to go, or do not know how to obtain emergency assistance for their present location.
- a user dials a phone number for a location server, which is may be an unstaffed automated system.
- the user's call is routed to the location server which then prompts the user using speech synthesis techniques for information from the user to help determine where the user is and what type of service the user desires, e.g., emergency assistance, location determination, directions, and so forth.
- the method comprises the steps of receiving, from a user, a first wireless voice transmission including a verbal description of a location.
- the first wireless voice transmission is converted into a data representation of the location.
- the location may include a street address or a landmark name
- the verbal description may include at least one of at least one street address, at least one highway designation, at least one landmark name, and at least one building title.
- each of a plurality of locations is stored in a database as a data representation along with a corresponding street address, a corresponding landmark name, and a corresponding grid reference.
- the user's location is determined using a wireless transmission location technique.
- the method may further comprise the step of adaptively learning by storing the user's location as determined by the wireless transmission location technique and storing corresponding radio frequency signature information to aid future location determination.
- the first wireless voice transmission may be routed to a location server, which dialogs with the user to determine the type of service, which may be a location-based service.
- the present invention may be applied to wireline voice transmissions.
- Additional steps include, using speech synthesis by the location server, converting a series of questions into transmitted signals audible by the user upon receipt and using speech recognition, converting a series of answers to the series of questions into data representations in a format processable by the location server to determine which of a plurality of stored data representations of locations corresponds to the data representation of the location referred to in the verbal description.
- a request for a type of service may also be transmitted.
- a second wireless transmission, including the type of service, is received.
- the second wireless transmission is converted into a data representation of the type of service, and the data representation of the type of service and the data representation of the location are processed into information useful to the user.
- a message providing the information to the user is automatically transmitted.
- the location-based service may be a request for a street address for a desired location.
- the processing step may further comprise the steps of determining a grid reference for the desired location and determining a street address corresponding to the grid reference for the desired location from a database that stores each of a plurality of locations as a data representation along with a corresponding street address and a corresponding grid reference.
- the street address corresponding to the grid reference is converted into a third wireless voice transmission that is transmitted to the user.
- the location-based service may be a request for directions to a desired location.
- the processing step may further comprise the steps of determining a first grid reference from the data representation of the location, wherein the location is a starting location, and determining a second grid reference for the desired location.
- determining a first grid reference from the data representation of the location wherein the location is a starting location
- determining a second grid reference for the desired location Using a stored map having the first grid reference and the second grid reference, directions from the starting location to the desired location are determined.
- the directions are converted into a third wireless voice transmission, which is transmitted to the user.
- the stored map may be updated with road construction information, such that directions are determined that avoid using streets or highways currently under road construction.
- the location-based service may be a request for emergency assistance to a desired location, in which case a message, requesting the type of emergency assistance be sent to the desired location, is transmitted to a provider of the type of emergency assistance.
- the provider of the type of emergency assistance transmits an estimated time of arrival of the type of emergency assistance requested, and a message is transmitted to the user indicating the estimated time of arrival.
- a block diagram of a communication system in accordance with the present invention is shown in FIG. 1.
- a wireless communication unit 101 transmits its user's request for service to a wireless base station 103, also known as a repeater.
- the wireless communication unit 101 may be a cellular telephone, two-way radio with telephone interconnect capability, and so forth.
- the base station 103 forwards the call to a call router 105, which routes the call to the location server 109 corresponding to the phone number dialed by the communication unit 101.
- a user of a wireline communication unit 107 such as a pay phone, a standard telephone, or cordless telephone, may also dial the location server 109 to receive its services.
- the location server 109 is basically comprised of a data processor 111, such as a POWER PC 603/66 microprocessor available from Motorola, Inc.
- the processor has access to a speech recognition module 113, which takes the digitized speech that is transferred to the location server 109 and converts the digitized speech into digital signals for use by the data processor 111.
- the data processor 111 may ask the user of the communication unit 101 or 107 for more information, by asking questions, to more specifically determine either where the user is or what type of service the user requests.
- Such questioning is provided through a speech synthesis module 117, which takes stored questions and converts them into voice transmissions that when transmitted via communication channels, become audible to the user after demodulation by his/her communication unit 101 or 107.
- a speech synthesis module 117 takes stored questions and converts them into voice transmissions that when transmitted via communication channels, become audible to the user after demodulation by his/her communication unit 101 or 107.
- the commercially available "Software Developer's Kit for Microprocessors,” available from Learnout & Hauspie can both recognize and synthesize speech.
- the data processor 111 also has access to a location database 115, from which the data processor 111 can try to match user information converted to digital information to stored location information, such as addresses and landmark names. When a match arises between the information from the user of the communication unit 101 or 107 and information in the database, the data processor 111 knows that it has located the user or the user's requested location.
- the location database 115 includes for each geographic location a street address, including numbers and street names or highway names and/or numbers. Each geographic location also has a corresponding landmark name.
- the landmark name includes, for example, the name of a restaurant, a business, an airport, a historic place of interest, a bus station, a train station, a building, and so forth.
- Each location in addition to having a street address and a landmark name, has a corresponding grid reference.
- Each area has a grid reference in terms of X and Y coordinates such that correlations may be provided between two different geographic locations.
- X and Y components may be, for example, longitude and latitude components.
- FIG. 2 A flowchart describing location determination by a location server 109 is shown in FIG. 2.
- a voice transmission with a verbal description of a location is received.
- the voice transmission is converted into a data representation of the location that was verbally described.
- FIG. 3 shows a method of providing a dialogue technique.
- it is determined if the location from step 207 is found in the location database 115. If the location is found at step 207, the process continues with step 215.
- the process continues with step 211.
- the location is determined using wireless transmission location techniques, such as AVL (Automatic Vehicle Location), GPS (Global Positioning Satellite), and other such techniques as are known in the art. See for example, U.S. Patent Application No. 08/XXX,XXX, titled “Method and Apparatus for Determining the Location of a Wireless Communication System Subscriber,” filed on behalf of Eugene J. Bruckert et al. on June 12, 1996 with the same assignee as the present application, which application is incorporated herein by reference.
- the location server adaptively learns from the location determining step 211 by storing transmission parameters along with the associated location. These transmission parameters include signal strength, bit error rate, and signal delay spread.
- the location database transmits, to the user, a request for a type of service desired by the user.
- This request would be in the form of a speech synthesized message that prompts for particular answers from the user.
- the user may respond either verbally by stating one of a selected number of choices, or by pressing a particular button or set of buttons on the telephone key pad.
- the types of service are location- based services.
- one type of service may be a request for a street address of a particular location, where the user knows the landmark name, but not the street address, but can find the location from the street address.
- the user may wish to know the address for a particular restaurant, but can find the restaurant once the address is known.
- Another service may be a request for directions from a starting location to a desired
- Another type of service may be emergency dispatch service, such as fire, police, or ambulance.
- emergency dispatch service such as fire, police, or ambulance.
- a person may be in a remote area, or may simply not know where they are, but has a wireless communication unit such as a cellular phone and needs an ambulance or other emergency assistance dispatched to their location.
- the user may request to speak to a live operator or other individual, to whom the location server would route the call.
- the type of service and the location are processed into information useful to the user. If a street address was requested by the user, a street address is provided to the user corresponding to the location provided by the user at step 201. See FIG. 4 and its associated text for more details. If, for example, the user requests directions from one location to another location, the location server 109 will provide directions from a starting location to a desired location. In addition, road construction information may also be entered into the database, such that when the directions are determined by the location server 109 the directions may be provided such that streets or highways currently under road construction are avoided. Multiple sets of directions may be provided under this method. See FIG. 5 and its associated text for more details. If the user requested emergency assistance, the user may be sent an estimated time of arrival, as sent to the location server 109 after it requests the appropriate assistance from the appropriate provider. See FIG. 6 and its associated text for more details.
- a flowchart showing a method of dialoging between a location server 109 and a user with a communication unit 101 or 107 is shown in the flowchart of FIG. 3.
- a question is converted to a voice transmission and transmitted to the user.
- a series of questions is stored in the location database 115, which questions are designed to obtain the information needed by the location server 109.
- an answer to the question is received by the location server.
- the location server 109 determines if the answer received at step 303 provides the information sought by the location server 109 to properly determine the location.
- step 305 If a location is determined by the answer at step 305, the process ends. If the location is not yet determined, the process continues with step 307. If there are more questions to be asked from the series of questions at step 307, the process continues with step 301. If no more questions are to be asked at step 307, the process ends without a location being determined.
- the following example is a dialog that may take place between a location server 109 and a user of a communication unit 101.
- LOCATION SERVER 109 "Good afternoon. Would you like information about restaurants, hotels, gas stations, florists, or do you require emergency service?"
- LOCATION SERVER 109 "There are three florists nearby: Abie's, Baker's, and Charlie's. Charlie's is closest. Which one do you prefer?"
- a flowchart showing a method for determining a street address is shown in the flowchart of FIG. 4.
- a grid reference is determined for the location provided by the user at step 201.
- a street address is determined from the grid reference determined at step 401. This process involves looking up the grid reference in the location database 115 and finding the corresponding street address from the location database 115.
- the street address is converted into a voice transmission using the speech synthesis module 117.
- the voice transmission is transmitted to the user, and the process ends.
- a flowchart showing a method of determining directions from a starting location to a desired location is shown in the flowchart of FIG. 5.
- a grid reference is determined for the starting location, which is the location described at step 201.
- a grid reference is determined for the desired location, which is requested from the user.
- directions are determined from the starting location to the desired location using the differences between the grid references. For example, the commercially available Tripmaker 1996 Edition CDROM from Rand McNally & Company provides a drive route given a source and destination address.
- the directions are converted into a voice transmission using the speech synthesis module 117.
- the voice transmission is transmitted to the user, and the process ends.
- a flowchart describing a method of handling a request for emergency assistance is shown in the flowchart of FIG. 6.
- the type of emergency assistance requested is determined, for example, by using the steps of the flowchart of FIG. 3, until the particular type of emergency assistance required is determined.
- a provider of the type of emergency assistance is determined from a look-up table in the location database 115.
- the location database 115 has stored phone numbers, provider locations, and other relevant information necessary to assist the location server 109 in requesting emergency information. For example, if the user requests that an ambulance be sent, the location server will look under ambulance in the location database 115 and find a provider of an ambulance that is close in location to the present location of the user.
- a message to the provider is transmitted, wherein the message requests the type of emergency assistance the user requested at the location of the user.
- the location server 109 receives an estimated time of arrival of the emergency assistance from the provider.
- the location server 109 transmits to the user the estimated time of arrival of the
- the following example is a dialog that may take place between a location server 109 and a user of a communication unit 101.
- LOCATION SERVER 109 "Good afternoon. Would you like information about restaurants, hotels, gas stations, florists, or do you require emergency service?"
- LOCATION SERVER 109 "Do you need the police, an ambulance, fire department, or roadside service?"
- LOCATION SERVER 109 "Connecting; a police vehicle will be at your location within 60 seconds ... Thank you and good bye.”
- the present invention provides the following advantages.
- the present invention provides easy addition or modification of services supplied because the server is centralized in location. Wireless users are provided with location information and other services that were previously limited to automobiles and wireline users.
- the use of the RF location equipment helps narrow the scope of possible items for processing by the voice recognizer. Correlating subscriber- provided location information with the RF location information helps to better predict and analyze wireless communication system coverage, thereby providing a mechanism to learn RF coverage as the wireless communication system is used.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97914865A EP0907895A4 (en) | 1996-06-27 | 1997-03-10 | Location determination in a communication system |
JP10502917A JP2000513470A (en) | 1996-06-27 | 1997-03-10 | Position determination in communication systems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67103796A | 1996-06-27 | 1996-06-27 | |
US08/671,037 | 1996-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997050002A1 true WO1997050002A1 (en) | 1997-12-31 |
Family
ID=24692894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/003406 WO1997050002A1 (en) | 1996-06-27 | 1997-03-10 | Location determination in a communication system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0907895A4 (en) |
JP (1) | JP2000513470A (en) |
KR (1) | KR20000022231A (en) |
CA (1) | CA2259165A1 (en) |
WO (1) | WO1997050002A1 (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999066738A1 (en) * | 1998-06-19 | 1999-12-23 | Murex Securities, Ltd. | Automatic routing and information system for mobile telephonic services |
WO2002088880A2 (en) | 2001-04-27 | 2002-11-07 | Accenture Llp | Location-based services |
US7224981B2 (en) * | 2002-06-20 | 2007-05-29 | Intel Corporation | Speech recognition of mobile devices |
EP2035319A2 (en) * | 2006-07-05 | 2009-03-18 | Cisco Technology, Inc. | Providing navigation directions |
US7595724B2 (en) | 2004-01-17 | 2009-09-29 | Huawei Technologies Co., Ltd. | Method for obtaining direction of target location through a handset |
US7698228B2 (en) | 2001-04-27 | 2010-04-13 | Accenture Llp | Tracking purchases in a location-based services system |
US8694025B2 (en) | 1999-09-24 | 2014-04-08 | Dennis Dupray | Geographically constrained network services |
US9060341B2 (en) | 1996-09-09 | 2015-06-16 | Tracbeam, Llc | System and method for hybriding wireless location techniques |
US9134398B2 (en) | 1996-09-09 | 2015-09-15 | Tracbeam Llc | Wireless location using network centric location estimators |
US20150288631A1 (en) * | 2002-10-08 | 2015-10-08 | Iii Holdings 2, Llc | Coordination of data received from one or more sources over one or more channels into a single context |
US9875492B2 (en) | 2001-05-22 | 2018-01-23 | Dennis J. Dupray | Real estate transaction system |
US10175060B2 (en) | 2016-09-06 | 2019-01-08 | Microsoft Technology Licensing, Llc | Translation of verbal directions into a list of maneuvers |
US10641861B2 (en) | 2000-06-02 | 2020-05-05 | Dennis J. Dupray | Services and applications for a communications network |
US10684350B2 (en) | 2000-06-02 | 2020-06-16 | Tracbeam Llc | Services and applications for a communications network |
US10819849B1 (en) | 2019-10-10 | 2020-10-27 | Motorola Solutions Inc. | Device, system and method for address validation |
US10972873B2 (en) | 2018-12-17 | 2021-04-06 | Here Global B.V. | Enhancing the accuracy for device localization |
Families Citing this family (1)
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CN105554946B (en) * | 2015-12-30 | 2018-11-16 | 生迪智慧科技有限公司 | Lighting device with wireless speech transparent transmission function |
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- 1997-03-10 KR KR1019980710651A patent/KR20000022231A/en not_active Application Discontinuation
- 1997-03-10 EP EP97914865A patent/EP0907895A4/en not_active Withdrawn
- 1997-03-10 CA CA002259165A patent/CA2259165A1/en not_active Abandoned
- 1997-03-10 WO PCT/US1997/003406 patent/WO1997050002A1/en not_active Application Discontinuation
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US9277525B2 (en) | 1996-09-09 | 2016-03-01 | Tracbeam, Llc | Wireless location using location estimators |
US9237543B2 (en) | 1996-09-09 | 2016-01-12 | Tracbeam, Llc | Wireless location using signal fingerprinting and other location estimators |
US9134398B2 (en) | 1996-09-09 | 2015-09-15 | Tracbeam Llc | Wireless location using network centric location estimators |
US9060341B2 (en) | 1996-09-09 | 2015-06-16 | Tracbeam, Llc | System and method for hybriding wireless location techniques |
WO1999066738A1 (en) * | 1998-06-19 | 1999-12-23 | Murex Securities, Ltd. | Automatic routing and information system for mobile telephonic services |
US8694025B2 (en) | 1999-09-24 | 2014-04-08 | Dennis Dupray | Geographically constrained network services |
US11765545B2 (en) | 1999-09-24 | 2023-09-19 | Dennis Dupray | Network services dependent on geographical constraints |
US10455356B2 (en) | 1999-09-24 | 2019-10-22 | Dennis J. Dupray | Network services dependent upon geographical constraints |
US9699609B2 (en) | 1999-09-24 | 2017-07-04 | Dennis J. Dupray | Network services dependent upon geographical constraints |
US9078101B2 (en) | 1999-09-24 | 2015-07-07 | Dennis Dupray | Geographically constrained network services |
US10684350B2 (en) | 2000-06-02 | 2020-06-16 | Tracbeam Llc | Services and applications for a communications network |
US10641861B2 (en) | 2000-06-02 | 2020-05-05 | Dennis J. Dupray | Services and applications for a communications network |
US7698228B2 (en) | 2001-04-27 | 2010-04-13 | Accenture Llp | Tracking purchases in a location-based services system |
WO2002088880A2 (en) | 2001-04-27 | 2002-11-07 | Accenture Llp | Location-based services |
US7860519B2 (en) | 2001-04-27 | 2010-12-28 | Accenture Global Services Limited | Location-based services system |
EP1391127A2 (en) * | 2001-04-27 | 2004-02-25 | Accenture LLP | Location-based services |
EP1391127A4 (en) * | 2001-04-27 | 2007-11-28 | Accenture Llp | Location-based services |
US7437295B2 (en) | 2001-04-27 | 2008-10-14 | Accenture Llp | Natural language processing for a location-based services system |
US11610241B2 (en) | 2001-05-22 | 2023-03-21 | Mobile Maven Llc | Real estate transaction system |
US9875492B2 (en) | 2001-05-22 | 2018-01-23 | Dennis J. Dupray | Real estate transaction system |
US7224981B2 (en) * | 2002-06-20 | 2007-05-29 | Intel Corporation | Speech recognition of mobile devices |
US20150288631A1 (en) * | 2002-10-08 | 2015-10-08 | Iii Holdings 2, Llc | Coordination of data received from one or more sources over one or more channels into a single context |
US10341273B2 (en) | 2002-10-08 | 2019-07-02 | Iii Holdings 2, Llc | Coordination of data received from one or more sources over one or more channels into a single context |
US10397151B2 (en) | 2002-10-08 | 2019-08-27 | Iii Holdings 2, Llc | Coordination of data received from one or more sources over one or more channels into a single context |
US11290401B2 (en) | 2002-10-08 | 2022-03-29 | Iii Holdings 2, Llc | Coordination of data received from one or more sources over one or more channels into a single context |
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Also Published As
Publication number | Publication date |
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CA2259165A1 (en) | 1997-12-31 |
JP2000513470A (en) | 2000-10-10 |
EP0907895A1 (en) | 1999-04-14 |
EP0907895A4 (en) | 2001-01-17 |
KR20000022231A (en) | 2000-04-25 |
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