Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
  • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is 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
  • 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
  • G01S19/07—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
  • G01S19/071—DGPS corrections
• • 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

Definitions

• the present invention is generally related to wireless communication networks, and more particularly to a wideband code division multiple access (WCDMA) third generation (3G) network for mobile positioning.
• WCDMA wideband code division multiple access
• Wireless communication networks including fixed wireless and cellular-type mobile communications networks continue to evolve.
• technologies for providing wireless communications including CDMA, TDMA, GSM, AMPS and D-AMPS.
• CDMA Code Division Multiple Access
• TDMA Time Division Multiple Access
• GSM Global System for Mobile communications
• AMPS AMPS
• D-AMPS D-AMPS
• WCDMA wideband code division multiple access
• the present invention achieves technical advantages as a method of provisioning differential GPS assistance data in a WCDMA network over the dedicated physical data channel (DPDCH), and/ or the dedicated physical control channel (DPCCH).
• DPDCH dedicated physical data channel
• DPCCH dedicated physical control channel
• the mobile user terminal may comprise of a mobile cellular-type mobile station, such as a PCS or cellular phone, but may also include a computer, or a PDA.
• the mobile communication terminal according to the present invention includes mechanisms for exchanging wireless communications with a serving wireless communication network, and in addition, means to receive differential GPS assistance data over a dedicated physical channel, such as the DPDCH or DPCCH.
• the mobile communication terminal further has circuitry and software in a GPS receiver to determine a position of the mobile communication terminal as a function of this GPS assistance data with improved resolution.
• Figure 1 is a block diagram of a wireless communication network
• FIG. 2 is a flow diagram of a method of the present invention providing differential GPS (DGPS) assistance data over the DPDCH or DPCCH on a WCDMA carrier to support differential GPS positioning of a mobile station in the network;
• DGPS differential GPS
• Figure 3 is a block diagram of one format for providing differential GPS assistance data over the DPCCH.
• Figure 4 is a block diagram of an alternative embodiment of the present invention providing differential GPS assistance data over the DPDCH.
• FIG. 1 illustrates a block diagram of a communication network 10 according to the preferred embodiment of the present invention.
• Communication network 10 preferably comprises a wireless telephony network seen to include an originating mobile station 12 coupled by an RF communication link to a servicing WCDMA originating network 14.
• the originating mobile station 12 is preferably a wireless communication device comprising a wireless mobile station.
• the originating WCDMA network 14 is seen to be coupled to a transit network or communication
• link 16 which may comprise a public switched telephone network
• the transit network 16 interfaces and communicates electrical signals including digitized voice calls between originating network 14 and a terminating network 18.
• Terminating network 18 may be the same as, or different than, the originating network 14, and may
• terminating network 18 is depicted as a WCDMA network. Terminating network 18 is coupled to and services via an RF link a terminating mobile station 20, which may comprise of a fixed or mobile station such as a wireless cellular or PCS subscriber.
• stations and networks may have codecs to provide encoding and decoding of digital signals communicated over the transit network 16.
• the originating WCDMA network 14 is seen to include a base transceiver station (BTS) 30 serving via a radio frequency (RF) link the BTS.
• BTS base transceiver station
• RF radio frequency
• Originating network 14 is further seen to include a radio network controller (RNC) 32 and a network switching system (NSS) 34.
• RNC radio network controller
• NSS network switching system
• the BTS and RNC are sometimes collectively referred to as a base switching station
• NSS 34 includes a home location register (HLR), a mobile positioning node, and a visitor location register (VLR) which includes and stores various information of the stations 12 currently being served by the originating network 14.
• HLR home location register
• VLR visitor location register
• Terminating network 18 is seen to include a BTS 40 serving the terminating station 20, and typically serves multiple stations 20. Terminating network 18 is further seen to include a RNC 42 and NSS 44.
• Terminating network 18 may operate according to the same operating protocol as originating network 14, i.e., both are WCDMA networks, or, the terminating network 18 may be different from the originating network 14, i.e., the originating network is WCDMA and the terminating network may be based on AMPS, D-AMPS, GSM, TDMA or IS-95 protocols.
• NSS 44 includes a HLR, and a VLR for maintaining a register of information for all stations 20 currently being served by the terminating network 18.
• a reference GPS receiver 46 provides GPS assistance data positioning information to the respective network 14 and network 18, for use by originating mobile station 12 according to the present invention.
• Transit network 16 is preferably a PSTN. Originating NSS 34 and terminating NSS 44 exchange digitized voice data thereover, which are preferably encoded in pulse code modulation (PCM) format, and transmitted at about 64 kbps. Although PCM is a preferred encoding format, other encoding formats are available according to the present invention. Likewise, other transfer speeds other that 64 kbps are also contemplated by the present invention. Generally, the digitized voice data transferred over transit network 16 can be in any format which is compatible and supported by both the originating network 14 and the terminating network 18.
• PCM pulse code modulation
• DGPS differential GPS
• the DGPS assistance data is continuously provided by a node of the network 10, such as the BTS 32, over the air interface to the user terminal 12 over either the dedicated physical data channel (DPDCH) or the dedicated physical control channel (DPCCH).
• DPDCH dedicated physical data channel
• DPCCH dedicated physical control channel
• RNC/ Core network 34 to initiate positioning of user terminal 12.
• the user terminal 12 has an integrated GPS receiver that processes the DGPS assistance data provided by the network 10 to determine the position or aid in the positioning of user terminal 12 using
• the differential GPS assistance data can be processed to speed the search of a priori information from the GPS satellites (not shown) to determine positioning of the user terminal 12 to a resolution of about 5 meters.
• the current position of the user terminal 12 is provided in Positioning Response message 58 by user terminal 12 to the BTS/ node B 32, which message is forwarded in the Positioning Response message 59 to the RNC/ Core network 34.
• the DGPS assistance data is then continued to be provided over the air interface on the DPDCH or DPCCH as desired for future use.
• the user terminal 12 can comprise of many mobile communications devices including PCS and cellular-type mobile phones, computers provided with suitable remote access circuitry, and PDAs. Thus, limitation to the particular type of mobile user terminal 12 is not to be inferred in the present invention. Rather, the present invention is directed
• the integrated differential GPS receiver at the WCDMA end user terminal can be integral to the equipment, such as embedded within the handset of the mobile station, or an attachment.
• an external PC or PDA can be provided with an integrated differential GPS receiver, and be used as a very accurate map tool, for fleet management etc.
• FIG. 3 there is shown a block diagram of one communication format providing DGPS assistance data over the
• DPCCH dedicated physical control channel
• one data packet 60 of the DPCCH is seen to comprise a slot having a time frame of about 0.625 milliseconds.
• This data packet 60 may comprise a header comprising an N number of bits comprising the Pilot, a Transport Frame Indicator (TFI), and a Transport Power Control (TPC). This data is typically used to control power of the mobile station 12 on the uplink.
• TPC Transport Power Control
• This data packet 60 is seen to comprise of one slot of several slots of a frame generally shown at 62, the slots together having a frame time of about 10 milliseconds.
• This frame 62 is seen to comprise of one of a plurality of frames together comprising a superframe having a time
• the DGPS assistance data typically comprise of about 5 slots 60 within the frame 62.
• this number of slots required to provide the DGPS assistance data may increase or decrease, and limitation to the number or length of slots required to provide the DGPS assistance data is not to be inferred in the present invention.
• each packet of information 70 is seen to comprise of one slot of several slots forming a frame 72. These slots together comprise one frame of several frames 72 comprising a superframe 74.
• the DGPS assistance data is provided in approximately 4 or 5 slots 70, although limitation to the format of the information is not to be inferred.
• the present invention achieves technical advantages by providing differential GPS assistance data over the DPDCH and/ or DPCCH of a WCDMA 3G wireless communication network to a mobile user to aid in positioning the mobile user.
• the present invention provides a mechanism facilitating positioning of a mobile communication terminal 12 to about 5 meters.
• the user terminal 12 is provided with an integrated differential
• the present invention comprises a mechanism for provisioning the data to provide very accurate map tools, fleet management, etc. in 3G WCDMA systems.

Landscapes

• Engineering & Computer Science (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Computer Networks & Wireless Communication (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Signal Processing (AREA)
• Position Fixing By Use Of Radio Waves (AREA)
• Mobile Radio Communication Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=22779535

Family Applications (1)

Country Status (9)

Families Citing this family (7)

Family Cites Families (3)

• 1999
  • 1999-11-05 EP EP99963868A patent/EP1149303A1/en not_active Withdrawn
  • 1999-11-05 JP JP2000587203A patent/JP2002540644A/ja not_active Withdrawn
  • 1999-11-05 WO PCT/US1999/026283 patent/WO2000034800A1/en not_active Application Discontinuation
  • 1999-11-05 AU AU20221/00A patent/AU2022100A/en not_active Abandoned
  • 1999-11-05 CN CN99815932A patent/CN1334925A/zh active Pending
  • 1999-11-05 CA CA002353539A patent/CA2353539A1/en not_active Abandoned
  • 1999-11-05 KR KR1020017007118A patent/KR20010080715A/ko not_active Application Discontinuation
  • 1999-12-07 AR ARP990106230A patent/AR021572A1/es unknown
• 2000
  • 2000-01-27 TW TW088121442A patent/TW452656B/zh not_active IP Right Cessation

Non-Patent Citations (1)

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