WO2001027649A1 - Method and apparatus for transferring location estimates from a first transceiver to a second transceiver - Google Patents
Method and apparatus for transferring location estimates from a first transceiver to a second transceiver Download PDFInfo
- Publication number
- WO2001027649A1 WO2001027649A1 PCT/US2000/026350 US0026350W WO0127649A1 WO 2001027649 A1 WO2001027649 A1 WO 2001027649A1 US 0026350 W US0026350 W US 0026350W WO 0127649 A1 WO0127649 A1 WO 0127649A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transceiver
- location estimate
- location
- confidence level
- estimate
- Prior art date
Links
Classifications
-
- 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
- G01S5/0072—Transmission between mobile stations, e.g. anti-collision systems
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- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/05—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- This invention relates in general to wireless communication systems, and more particularly, to a method and apparatus for transferring location estimates from a first transceiver of a plurality of wireless transceivers to a second transceiver.
- Wireless communication systems for serving the connectivity needs of portable transceivers are rapidly evolving into linked, multi-speed wireless networks.
- a wireless wide area network may provide relatively low speed connectivity throughout a metropolitan area
- numerous wireless short range networks also may exist throughout the area for providing short range high speed connectivity where needed.
- Portable transceivers that are capable of peer-to-peer communications e.g., Bluetooth devices, also can create ad hoc SRNs with one another that can operate independently of fixed portions of the wireless communications system.
- a portable transceiver can develop a need for information that is available from a network server, or from another transceiver within the same network as the first transceiver.
- the information may be of many different types, and a good example is server assisted global positioning system (GPS) information, which can greatly enhance the sensitivity and accuracy of a GPS receiver that may be used by the portable transceiver for location determination.
- GPS global positioning system
- the network server has been centrally located, e.g., at the site of a central controller of the wireless communications system, and has been accessed through the wireless WAN. Accessing the network server for assisted location information can generate substantial traffic in the wireless WAN when a large number of the portable transceivers are GPS equipped. This traffic is undesirable, as it can increase system latency and potentially can overload the wireless WAN.
- a method and apparatus for transferring location estimates from a first transceiver of a plurality of transceivers to a second transceiver Preferably, the method and apparatus will operate to substantially reduce the wireless WAN traffic required to seek and transfer the information.
- FIG. 1 is an electrical block diagram of an exemplary wireless communication system in accordance with the present invention
- FIG. 2 is an electrical block diagram of an exemplary peer-to-peer mode of operation of the transceivers in accordance with the present invention
- FIG. 3 is an electrical block diagram of an exemplary transceiver in accordance with the present invention
- FIG. 4 is a flow diagram depicting the operation of the transceiver in accordance with the present invention.
- FIG. 5 is a flow diagram depicting the process of transferring a location estimate from a first transceiver of a plurality of wireless transceivers to a second transceiver according to the method and system of the present invention.
- an electrical block diagram depicts an exemplary wireless communication system in accordance with the present invention, comprising a fixed portion 102 including a controller 112 and a plurality of conventional base stations 116, the communication system also including a plurality of transceivers 122.
- the base stations 116 preferably communicate with the transceivers 122 utilizing conventional radio frequency (RF) techniques, and are coupled by conventional communication links 114 to the controller 112, which controls the base stations 116.
- RF radio frequency
- Each of the base stations 116 transmits RF signals to the transceivers 122 via an antenna 118.
- the base stations 116 preferably each receive RF signals from the plurality of transceivers 122 via the antenna 118.
- another wireless communication technology such as infra red technology, can be used to comminute between the base stations 116 and the transceiver 122.
- the controller 112 is preferably coupled by telephone links 101 to a public switched telephone network (PSTN) 110 for receiving selected call message originations therefrom.
- PSTN public switched telephone network
- Selective call originations comprising voice or data messages from the PSTN can be generated, for example, from a conventional telephone 111 or a conventional computer 117 coupled to PSTN 110.
- LAN local area network
- WAN wide area network
- the controller 112 is also coupled to a conventional network server 108 for providing information requested by the transceivers 122.
- the network server 108 is preferably coupled to a GPS receiver
- FIG. 2 illustrates an electrical block diagram of an exemplary peer-to-peer mode of operation of the transceivers 122 in accordance with the present invention.
- the transceivers 122 form an ad hoc short-range network among themselves.
- FIG. 3 is an electrical block diagram of an exemplary transceiver 122 in accordance with the present invention.
- the transceiver 122 comprises an antenna 304 for receiving an incoming call or message and for transmitting an outgoing call or message.
- the antenna 304 is preferably coupled to a conventional receiver 308 for receiving the incoming call or message and is coupled to a conventional transmitter 309 for transmitting the outgoing call or message.
- the receiver 308 and transmitter 309 are coupled to a processing system 306 for processing the incoming and outgoing call or messages and for controlling the transceiver 122 in accordance with the present invention.
- a user interface 314 may also be coupled to the processing system 306 for interfacing with a user.
- the user interface 314 may comprise a conventional telephone keypad 320 or a conventional keyboard for requesting that an operation be performed and for controlling the transceiving 122, a conventional display 316, and a conventional alert element 318 for alerting the user when an incoming call or message arrives.
- a conventional clock 307 is also coupled to the processing system 306 for supporting time keeping requirements of the transceiver 122.
- the processing system 306 comprises a conventional processor 310 and a conventional memory 312.
- the memory 312 comprises software elements and data for programming the processing system 306 in accordance with the present invention.
- the memory 312 further comprises a message processing element 314 for programming the processing system 306 to process messages through well-known techniques.
- the memory 312 includes a location information processing program 316 for programming the processing system 306 to cooperate with the controller 312 to process location information through well known techniques, such as server assisted GPS techniques.
- the transceiver 122 also includes a location receiver 334, such as a GPS receiver, coupled to the processing system 306.
- FIG. 4 is a flow diagram depicting the operation of a transceiver in accordance with the present invention.
- the flow begins at reference numeral 402 wherein the step of detecting a need for a location estimate is performed.
- the step of receiving a first transceiver's location estimate and predetermined attributes of the first transceiver's location estimate is performed.
- the step of receiving a calculated confidence level of the first transceiver's location estimate based upon the predetermined attributes is performed.
- the step of determining whether to update a second transceiver's location estimate and confidence level based upon the received location estimate and calculated confidence level of the first transceiver is performed.
- FIG. 5 is a flow diagram depicting the process of transferring a location estimate from a first transceiver of a plurality of wireless transceivers to a second transceiver according to the method and system of the present invention.
- the flow begins at reference numeral 502, wherein the step of detecting a need for a location estimate is performed.
- the step of transmitting, from a first transceiver, a location estimate of the first transceiver and predetermined attributes of the first transceiver's location estimate is performed.
- the step of calculating a confidence level of the location estimate of the first transceiver based upon the predetermined attributes is performed.
- the first transceiver's location estimate and the calculated confidence level is performed at a second transceiver.
- the step of determining whether to update the second transceiver's location estimate and confidence level based upon the received location estimate and calculated confidence level of the first transceiver is performed.
- the present invention comprises a method and apparatus to obtain location estimates for a device by interacting with nearby devices.
- the nearby devices may use any number of means to make the location estimate.
- Confidence estimates are then assigned to the information obtained from the interactions with the nearby devices.
- a number of parameters may be used to establish a confidence level of the location estimate received from a nearby device, such that a confidence level may be determined from the following equation:
- CL the calculated confidence level of the new location estimate obtained from interaction with a nearby device
- b a scaling factor.
- the confidence estimates assigned to the information obtained from the interactions with the nearby devices may be a function of the confidence level of the donated location estimate, time since the estimate was made, motion of the receiving unit, the method used to obtain the location estimate, the number of times the information may have been repeated from one device to another, the signal strength and quality of the communication signal, etc.
- fixed devices such as desktop computers, printers, etc. may store an average location estimates with the highest confidence estimates to improve the base line location estimate for these devices.
- transceivers can be positioned at fixed locations.
- a transceiver serving as a wireless interface for a printer, facsimile machine, computer, etc.
- Such a fixed transceiver preferably is pre-programmed with location information describing the location at which the transceiver is placed.
- a transceiver in response to having location information that is likely to be of interest to other transceivers, can advertise the availability of the location information, e.g., through periodic transmissions of messages.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0014275-1A BR0014275B1 (en) | 1999-10-08 | 2000-09-26 | METHOD AND APPARATUS FOR TRANSFERING ESTIMATES OF LOCATION FROM A FIRST TRANSCEIVER TO A SECOND TRANSCEIVER |
CA002386681A CA2386681C (en) | 1999-10-08 | 2000-09-26 | Method and apparatus for assigning location estimates from a first transceiver to a second transceiver |
JP2001530607A JP2003511991A (en) | 1999-10-08 | 2000-09-26 | Method and apparatus for transferring a position estimate from a first transceiver to a second transceiver |
FI20020648A FI114577B (en) | 1999-10-08 | 2002-04-04 | Method and apparatus for transmitting position estimates from a first transmitter receiver to a second transmitter receiver |
SE0201040A SE0201040D0 (en) | 1999-10-08 | 2002-04-05 | Method and apparatus for transferring position estimates from a first transceiver to a second transceiver |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/415,591 US6275707B1 (en) | 1999-10-08 | 1999-10-08 | Method and apparatus for assigning location estimates from a first transceiver to a second transceiver |
US09/415,591 | 1999-10-08 |
Publications (1)
Publication Number | Publication Date |
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WO2001027649A1 true WO2001027649A1 (en) | 2001-04-19 |
Family
ID=23646333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2000/026350 WO2001027649A1 (en) | 1999-10-08 | 2000-09-26 | Method and apparatus for transferring location estimates from a first transceiver to a second transceiver |
Country Status (9)
Country | Link |
---|---|
US (1) | US6275707B1 (en) |
JP (1) | JP2003511991A (en) |
KR (1) | KR100517005B1 (en) |
CN (1) | CN1217202C (en) |
BR (1) | BR0014275B1 (en) |
CA (1) | CA2386681C (en) |
FI (1) | FI114577B (en) |
SE (1) | SE0201040D0 (en) |
WO (1) | WO2001027649A1 (en) |
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BR0014275B1 (en) | 2014-08-12 |
SE0201040D0 (en) | 2002-04-05 |
CN1217202C (en) | 2005-08-31 |
KR20020038938A (en) | 2002-05-24 |
CA2386681A1 (en) | 2001-04-19 |
FI114577B (en) | 2004-11-15 |
FI20020648A (en) | 2002-04-29 |
BR0014275A (en) | 2002-05-21 |
US6275707B1 (en) | 2001-08-14 |
CA2386681C (en) | 2004-06-01 |
CN1378651A (en) | 2002-11-06 |
KR100517005B1 (en) | 2005-09-27 |
JP2003511991A (en) | 2003-03-25 |
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