(12) United States Patent
`Usui
`
`(10) Patent N0.:
`(45) Date of Patent:
`
`US 6,414,630 B1
`Jul. 2, 2002
`
`US006414630B1
`
`(54) POSITION DETECTION APPARATUS USED
`FOR A MOBILE OBJECT
`
`(75) Inventor: Takashi Usui, KanagaWa (JP)
`
`5,317,321 A * 5/1994 Sass .................... .. 342/357.08
`5,442,805 A * 8/1995 Sagers et a1.
`...... .. 342/457
`5,689,269 A * 11/1997 Norris ................. .. 342/357.08
`FOREIGN PATENT DOCUMENTS
`
`(73) Assignee: Sony Corporation, Tokyo (JP)
`
`W0
`
`WO 93/01576
`
`* 1/1993
`
`( * ) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U-S~C~ 154(k)) by 0 days-
`
`* Cited by examiner
`Primary Examiner_GregOry C_ Issing
`(74) Attorney, Agent, or Firm—Jay H. Maioli
`
`(21) Appl. N0.: 08/681,374
`(22) Filed:
`JuL 23 1996
`’
`Foreign Application Priority Data
`(30)
`Aug. 2, 1995
`(JP) ........................................... .. 7-197739
`
`(51) Int. Cl.7 ................................................ .. G01S 5/14
`(52) US. Cl. ................. .. 342/357.09; 342/455; 701/208
`(58) Field of Search ..................... .. 342/375.06, 357.07,
`34265708, 35709, 3571, 35713, 455,
`457; 701/208
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4,835,537 A * 5/1989 Manion ..................... .. 342/30
`5,025,261 A * 6/1991 Ohta etal. ........... .. 342/357.07
`5,153,836 A * 10/1992 Fraughton et a1. ........ .. 701/301
`
`ABSTRACT
`(57)
`Aposition detection apparatus can accurately detect user’s
`oWn position and other user’s position. The position detec
`tion apparatus includes a position detecting means (1) for
`dete.cnng usef 5 Own. posmofl’ a memory .means (2.) for
`stormg therem map information, a transmitting-receiving
`means (4) for transmitting user’s oWn identi?cation data and
`nsor’s oWn position information from tho position dotooting
`means (1) and receiving other useris identi?cation data and
`other user’s position information and a display means (3)
`supplied With user’oWn position information from the posi
`tion detecting means (1), other user’s position information
`from the transmitting-receiving means (4) and the map
`information from the memory means (2) and displaying a
`map on Which marks indicating user’s or other user’s
`Position or user’s own and other user’s Positions are put
`
`7 Claims, 6 Drawing Sheets
`
`Lt
`"'
`
`Input
`External
`f Information
`
`LS\ °,_
`User's Own
`Identification Data
`Position
`~1
`
`Detecting
`Means
`
`__ _ Multiplexing
`Means
`
`7
`1.
`2
`L Transmitting
`
`- Receiving
`Means
`
`'
`
`gggizisonown '\, 3 ~\_
`Information
`
`Separating
`Means
`
`5
`
`8t
`
`Output
`External_
`Information
`5
`
`2
`'\~
`
`memory
`euns
`
`\-
`Map
`information
`
`1
`,
`
`4
`
`Display
`Means
`/
`3
`
`Identi?cation
`Data Judgeme
`Means
`
`L
`
`\Other User's
`,
`Position
`Information and
`Identification
`Data
`
`3
`Transmission
`Determining
`information
`
`ZTE Exhibit 1025
`
`

`

`U.S. Patent
`
`Jul. 2, 2002
`
`Sheet 1 6f 6
`
`US 6,414,630 B1
`
`FIG. 7(PRI0R ART)
`
`1
`
`Position
`Information
`
`‘I
`
`I
`
`a
`
`Display
`Means
`
`_/_ 3
`
`Memory
`Means
`2
`2
`
`\\
`Map Information
`
`10
`
`11
`
`2
`
`3
`Receiving
`Unit
`
`12
`
`13
`
`Signal
`Processing
`Unit
`
`1s
`
`ZTE Exhibit 1025 - 2
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`

`

`U.S. Patent
`
`Jul. 2, 2002
`
`Sheet 2 6f 6
`
`US 6,414,630 B1
`
`FIG. 3
`
`1
`)
`Position
`Detecting
`Means
`
`2
`
`Map
`Information
`
`FIG. 4
`
`Lt
`
`User's Own
`J- Identification
`DOtCl
`
`5
`
`Transmitting
`— Receiving
`Means
`User's Own
`f Position
`information
`
`kl.
`
`_,
`
`9
`
`<—
`
`Identification
`JDa‘tla
`t
`u gemen
`Means
`
`_, 6
`
`Other User's
`\POSItIOn
`Information
`———-——0 And
`Identification
`Data
`
`Sync Bit
`
`Identification
`Data
`
`Latitude
`
`Longitude
`
`ZTE Exhibit 1025 - 3
`
`

`

`U.S. Patent
`
`Jul. 2, 2002
`
`Sheet 3 6f 6
`
`US 6,414,630 B1
`
`FIG. 5
`
`%
`
`ZTE Exhibit 1025 - 4
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`

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`U.S. Patent
`
`Jul. 2, 2002
`
`Sheet 4 6f 6
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`US 6,414,630 B1
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`FIG. 6
`
`5
`
`Lt
`‘F User's Own
`Identification
`N Data
`1.
`1
`I
`)
`—-_> Transmitting
`Position
`- Receiving
`Detecting
`Means —?_> Means
`
`<
`
`2
`)
`
`Map
`Information
`
`Memory
`Means
`
`-__L
`< ;
`
`p
`
`<_-_
`
`-
`
`_
`Display
`Means
`2
`3
`
`'\— User's Own
`Position
`Information
`
`5
`5
`v
`Identification
`Data Judgement
`Means
`
`>
`
`'\ Other User's
`Position
`——?—0 Information and
`Identification
`Data
`
`>
`
`8 Transmission
`Determining
`Information
`
`ZTE Exhibit 1025 - 5
`
`

`

`U.S. Patent
`US. Patent
`
`Jul. 2, 2002
`Jul. 2, 2002
`
`Sheet 5 6f 6
`Sheet 5 0f 6
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`US 6,414,630 B1
`US 6,414,630 B1
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`31
`
`i
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`22
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`
`
`to a? 6i}
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`ZTE Exhibit 1025 - 6
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`ZTE Exhibit 1025 - 6
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`

`

`U.S. Patent
`
`Jul. 2, 2002
`
`Sheet 6 6f 6
`
`US 6,414,630 B1
`
`FIG. 8
`
`Input
`Lt J..o__ External
`f Information
`
`“x o__ _. __: Multiplexing ""7
`User's Own
`Means
`L
`Identification Data
`2
`Position
`N1
`L Transmitting
`Detecting
`— Receiving
`Means
`Means
`
`<
`
`5
`
`8t
`
`User's Own
`Position \’ 8
`information
`
`2
`N Memory
`Means
`
`H
`
`< >
`
`Map
`information
`
`I
`
`.t
`
`Display
`Means
`2
`3
`
`Output
`External_
`Information
`Identi?cation
`Data Judgement“ 6
`Means
`
`‘\Other User's
`3 * Position
`Information and
`Identification
`Data
`
`>
`
`3
`Transmission
`Determining
`Information
`
`ZTE Exhibit 1025 - 7
`
`

`

`US 6,414,630 B1
`
`1
`POSITION DETECTION APPARATUS USED
`FOR A MOBILE OBJECT
`
`BACKGROUND OF THE INVENTION
`
`2
`random noise) code generated therein. The message signal
`and the pseudo-distance signal are supplied to a microcom
`puter 13, in Which they are computed for obtaining the
`present position of the mobile object. Therefore, there are
`obtained position data output (including data such as
`latitude, longitude, altitude, aZimuth or speed).
`The microcomputer 13 judges a GPS satellite Which is
`able to receive radio Waves at that time based on a clock
`signal from a clock circuit 14 belonging to the microcom
`puter 13 and almanac (calendar) data from the GPS satellite,
`and supplies the code control signal to the signal processing
`unit 12 based on a judged result thereby to generate the PRN
`code of the GPS satellite capable of receiving the radio
`Wave. Then, position information from the output side, i.e,
`an output terminal 15 of the microcomputer 13 is supplied
`to the display means 3 (see FIG. 1) as described above.
`When people are going to a destination by their oWn cars,
`they are communicating With each other through radio
`transmitter-receiver. Further, When a taXi control center
`issues commands to taXis With radio transmitter-receivers or
`taXis With radio transmitter-receivers communicate With
`each other, radio transmitter-receivers are used similarly.
`If the position detection apparatus mentioned in the
`preamble is mounted on the car, then the present position of
`the car With the position detection apparatus mounted
`thereon can be detected clearly. HoWever, only by the radio
`communication, it is impossible to accurately detect the
`positions of other cars and taXis.
`
`SUMMARY OF THE INVENTION
`
`In vieW of the aforesaid aspect, it is an object of the
`present invention to provide a position detection apparatus
`Which can accurately detect user’oWn position and other
`user’s position.
`According to an aspect of the present invention, there is
`provided a position detecting apparatus for a mobile object
`Which is comprised of position detecting means mounted on
`a ?rst mobile object for detecting a position of the ?rst
`mobile object, transmitting-receiving means for transmitting
`position information of the ?rst mobile object detected by
`the position detecting means and receiving position infor
`mation of a second mobile object transmitted from the
`second mobile object, memory means for storing map
`information, and display means supplied With the position
`information of the ?rst mobile object from the position
`detecting means, the position information of the second
`mobile object from the transmitting-receiving means and
`map information read out from the memory means in
`response to the position information of the ?rst or second
`mobile object and displaying a map on Which a mark
`indicative of the position of the ?rst mobile object and/or the
`position of the second mobile object is put.
`According to the present invention, user’s oWn position
`information from the position detecting means, other user’s
`position information from the. transmitting-receiving means
`and the map information from the memory means are
`supplied to the display means and thereby a map With marks
`indicating user’s oWn position or other user’s position or
`user’s and other user’s position put-thereon is displayed.
`
`BRIEFzDESCRIPTION OF THE DRAWINGS
`
`FIG. 1 is a schematic block diagram shoWing a conven
`tional position detection apparatus;
`FIG. 2 is a schematic block diagram shoWing a GPS
`receiver;
`
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`The present invention relates to a position detection
`apparatus for use With a mobile object, such as automobiles,
`airplanes or ships.
`FIG. 1 of the accompanying drawings shoWs a conven
`tional position detection apparatus. This position detection
`apparatus is mounted on a car When it is in use. A position
`detecting means 1 detects the position of a car and indicates
`a detected position of the car in the form of position
`information comprising latitude and longitude. A memory
`means 2 comprises a CD-ROM (compact disc-read-only
`memory) and a CD-ROM player for reproducing the
`CD-ROM. Map data of every place are stored in the
`CD-ROM. The memory means 2 is controlled by detected
`position information from the position detecting means 1
`and position information entered by the operator so that a
`map is selected from the CD-ROM in accordance With
`latitude and longitude of that position information and a
`reduced scale selected by the operator. Selected map infor
`mation is supplied to a display means 3. On the other hand,
`the detected position information from the position detecting
`means 1 also is supplied to the display means 3 and
`displayed on the map as a mark such as an arroW by the
`display means 3. AS the display means 3, there may be used
`a cathode-ray tube, a liquid-crystal display device, a plasma
`display device, etc.
`A GPS receiver, Which is an eXample of the position
`detecting means 1, Will be described With reference to FIG.
`2. Before describing the GPS receiver, a meaning and a
`measuring principle of the GPS Will be described beloW in
`brief. Of?cially, GPS is referred to as “NAVSTAR/GPS”,
`and “NAVSTAR/GPS” is a combination of capital letters of
`NAVigation system With Time And Ranging/Global Posi
`tioning System. According to the measuring principle of the
`GPS, delay times of radio Waves transmitted to the Earth
`from a plurality of GPS satellites orbiting the Earth are
`measured, and the position of a mobile object is measured by
`obtaining a present position of a mobile object on the Earth
`from the orbits of the GPS satellites. The position of the
`mobile object on the Earth can be obtained by measuring
`distances among the three GPS satellites and the present
`position of the mobile object on the Earth based on radio
`Waves transmitted from the three GPS satellites.
`Furthermore, since a common error caused by errors of
`clocks of GPS receivers can be eliminated by measuring
`distances among four GPS satellites and the present position
`of the mobile object on the Earth, latitude, longitude and
`altitude of the position of the mobile object on the earth can
`be measured.
`In FIG. 2, reference numeral 10 depicts an antenna for
`receiving radio Waves from a GPS satellite (not shoWn). A
`55
`microstrip antenna, for eXample, may be used as the antenna
`10. Areception signal (spectrum diffusion signal) of 1.2 GHZ
`or 1.5 GHZ received at the antenna 10 is supplied through a
`coaXial cable (not shoWn) to a receiving unit 11, in Which it
`is converted into an intermediate frequency signal With a
`loW frequency. The intermediate frequency signal is sup
`plied to a signal processing unit 12, in Which it is spectrum
`inverse-diffused to provide a message signal, a pseudo
`distance signal and a code control signal. The signal
`processing unit 12 calculates a pseudo-distance by synchro
`niZing the intermediate frequency signal based on the recep
`tion signal from the GPS satellite and a PRN (pseudo
`
`45
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`65
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`ZTE Exhibit 1025 - 8
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`

`

`US 6,414,630 B1
`
`3
`FIG. 3 is a schematic block diagram showing a position
`detection apparatus according to a ?rst embodiment of the
`present invention;
`FIG. 4 is a diagram shoWing a format of packet commu
`nication;
`FIG. 5 is a diagram shoWing an example of map infor
`mation displayed on a picture screen of a display means;
`FIG. 6 is a schematic block diagram shoWing a position
`detection apparatus according to a second embodiment of
`the present invention;
`FIG. 7 is a pictorial representation used to eXplain a
`relationship betWeen a service area of a communication
`system and mobile objects; and
`FIG. 8 is a schematic block diagram shoWing a position
`detection apparatus according to a third embodiment of the
`present invention.
`
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENTS
`
`Embodiments of the present invention Will be described
`hereinafter With reference to the draWings.
`Initially, a position detection apparatus according to a ?rst
`embodiment Will be described With reference to FIG. 3. In
`FIG. 3, the GPS receiver shoWn in FIG. 2 is used as a
`position detecting means 1. A memory means 2 is a
`CD-ROM in Which map information of every place are
`stored and a CD-ROM player. Position information from
`operator’s car is supplied from the position detecting means
`1 to the memory means 2. Then, the position information
`and map information selected by the operator are supplied to
`a display means 3 such as a cathode-ray tube, a liquid-crystal
`display device or a plasma display. At that time, position
`information of operator’s car is supplied from the position
`detecting means 1 to the display means 3 and thereby
`displayed as a mark such as an arroW on the map.
`A transmitting-receiving means 4 having an antenna 5
`transmits the position information from the position detect
`ing means 1 and identi?cation data for operator’s oWn car
`inputted to an input terminal 4t at every predetermined time
`With an interval of several seconds and receives position
`information from a position detection apparatus of other
`user’s car and identi?cation data for identifying other user’s
`car. These signals thus transmitted and received are spec
`trum diffusion modulation signals of packet signal compris
`ing sync bit, identi?cation data, latitude and longitude. The
`sync bit is used to synchroniZe bits When the packet signal
`is received. Since a communication based on a spectrum
`diffusion modulation communication is strong against dis
`turbance and interference from other radio Waves, there is
`then the advantage that a service area of radio
`communication, i.e., a range in Which radio Waves can reach
`can be Widened.
`The reception signal received by the transmitting
`receiving means 4 is demodulated and thereby position
`information and identi?cation data of one or a plurality of
`other users’cars are obtained. The position information and
`the identi?cation data are supplied to an identi?cation data
`judgement means 6, and the identi?cation data judgement
`means 6 determines Whether or not the identi?cation data is
`predetermined identi?cation data. If it is determined by the
`identi?cation data judgement means 6 that the identi?cation
`data is the predetermined identi?cation data, then position
`information of the identi?cation data is supplied to the
`memory means 2 and map information corresponding to the
`position information is read out from the memory means 2
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`and supplied to the display means 3. Also, the identi?cation
`data is supplied to the display means 3 and thereby displayed
`on a map as a mark different in shape and color from user’s
`oWn position information. Accordingly, identi?cation data
`and position information other than the predetermined iden
`ti?cation data are rejected by the identi?cation data judge
`ment means 6. When a distance betWeen user’s oWn car and
`other user’s car is short, position information of user’s oWn
`car and position information of other user’s car are displayed
`on the same map as distinguishable marks A and B as shoWn
`in FIG. 5. When on the other hand such distance is long, they
`are displayed on different maps separately.
`A second embodiment of the present invention Will be
`describe With reference to FIG. 6. Before describing the
`second embodiment of the present invention, a relationship
`betWeen a service area of a communication system and
`mobile objects Will be described With reference to FIG. 7.
`in FIG. 7, reference numerals 21, 22 depict transmitting
`receiving antennas of microWave communication system
`disposed With a predetermined distance therebetWeen. Ref
`erence numeral 23 depicts a service area for the
`transmitting-receiving antennas 21, 22. In the service area
`23, in order to prevent a communication from being hin
`dered by disturbance and interference of radio Waves, the
`transmission of radio Waves is inhibited Withing the service
`area. This Will be described speci?cally beloW. In FIG. 7,
`reference numeral 24 depicts a car running Within the
`service area 23, and reference numerals 25, 26 denote cars
`running outside the service area 23. The cars 25, 26 Which
`are running outside the service area 23 are able to transmit
`and receive information therebetWeen by means of a com
`munication device (radio transmitter-receiver). Further,
`betWeen the car running Within the service area 23 and the
`car running outside the service area 23, e.g., the car 25, the
`car 25 can transmit information to the car 26 by means of the
`communication device. HoWever, the transmission of infor
`mation from the car 24 to the car 25 is inhibited.
`Therefore, in the second embodiment shoWn in FIG. 6,
`transmission-inhibited area information is contained in map
`information stored in CD-ROM of the memory means 2.
`When a car is in the transmission-inhibited-area, transmis
`sion is automatically stopped. Speci?cally, a position detect
`ing means 1 detects position (6, (1)) of the user’s oWn car and
`a memory means 2 selects map information based on the
`detected position (6, (1)). In that case, transmission determin
`ing information Z (When the transmission determining infor
`mation Z is “1”, transmIssion is permitted, and When it is
`“0”, transmission is inhibited) is obtained from the map
`information and supplied to a transmitting-receiving means
`4 Whose transmission is controlled. Speci?cally, When the
`transmission determining information is inhibited, the trans
`mission of the user’s oWn identi?cation data and user’s oWn
`position information is transmitted. When the transmission
`determining information is permitted, it is needless to say
`that user’s oWn identi?cation data and user’s oWn position
`information are transmitted from the transmitting-receiving
`means 4. In FIG. 6, a rest of the arrangement is similar to that
`of FIG. 3 and therefore need not be described in detail.
`A third embodiment of the present invention Will be
`described With reference to FIG. 8. While user’s oWn
`identi?cation data and position information are transmitted
`by the transmitting-receiving means 4 and the antenna 5 and
`other user’s identi?cation data and position information are
`received by the transmitting-receiving means 4 and the
`antenna 5 in the ?rst and second embodiments shoWn in
`FIGS. 3 and 6, according to the third embodiment shoWn in
`FIG. 8, any one of an audio signal, a video signal With or
`
`ZTE Exhibit 1025 - 9
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`

`

`US 6,414,630 B1
`
`5
`Without an audio signal, a facsimile signal and a text data
`signal or a plurality of external information are transmitted
`and received. Therefore, user’s oWn position information
`from the position detecting means 1, user’s oWn identi?ca
`tion data from the terminal 4s and inputted external infor
`mation from the terminal 4t are multiplexed by a multiplex
`ing means 7 and supplied to the transmitting-receiving
`means 4 and thereby transmitted from the antenna 5. Further,
`there is provided a separating means 8. A multiplexed signal
`of one or a plurality of other users’position information,
`other user’s identi?cation data and outputted external infor
`mation received by the antenna 5 and the transmitting
`receiving means 4 is supplied to and separated by the
`separating means 8, Whereby the outputted external infor
`mation is outputted from an output terminal 8t and other
`user’s position information and other user’s identi?cation
`data are supplied to the identi?cation data judgement means
`6. In FIG. 8, a rest of the arrangement is similar to that of
`FIG. 3 and therefore need not be described in detail.
`User’s oWn and other user’s oWn (one or a plurality of)
`position information and identi?cation data may be ?xed or
`movable.
`According to the ?rst invention, since the position detec
`tion apparatus includes the position detecting means for
`detecting user’s oWn position, the memory means for storing
`therein map information, the transmitting-receiving means
`for transmitting user’s oWn identi?cation data and user’s
`oWn position information from the position detecting means
`and receiving other user’s identi?cation data and other
`user’s position information and the display means for receiv
`ing user’s oWn position information from the position
`detecting means, other user’s position information from the
`transmitting-receiving means and the map information from
`the memory means and displaying a map on Which marks
`indicating user’s oWn position or other user’s position or
`user’s and other user’s positions are indicated, it is possible
`to obtain the position detection apparatus Which can accu
`rately detect not only user’s oWn position but also other
`user’s position. Therefore, if user and other user are both
`mobile objects, i.e., cars and they are going to a common
`destination by their cars, the user and other user can knoW
`user’s or other user’s Wrong course. Accordingly, if the user
`and other user can communicate With each other by an audio
`signal, it becomes easy to correct the user’s or other user’s
`Wrong course. When the present invention is applied to the
`taxi service control system in Which the taxi service control
`center issues commands to a plurality of taxis or a delivery
`service control center issues commands to a plurality of
`delivery service tracks, the taxi service control center and
`the delivery service control center side can accurately con
`?rm the positions of the taxis and the delivery service tracks
`so that the taxis service control center and the delivery
`service control center can issue commands more easily.
`According to the second invention, in the position detec
`tion apparatus according to the ?rst invention, the
`transmission-inhibited area information is contained in the
`map information stored in the memory means. When the
`user’s position lies in the transmission-inhibited area, the
`transmission of user’s position is inhibited by supplying the
`transmission-inhibited information from the memory means
`to the transmitting-receiving means. Therefore, in addition
`to the effects achieved by the ?rst invention, When the user’s
`position lies in the transmission-inhibited area, the trans
`mission of user’s identi?cation data and user’s position
`information from the transmitting-receiving means can be
`inhibited automatically.
`According to the third invention, in the position detection
`apparatus according to the present invention, since user’s
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`oWn identi?cation data and user’s oWn position information
`and other information from the position detecting means are
`transmitted and other user’s identi?cation data, other user’s
`position information and other user’s other information are
`received by the transmitting-receiving means, in addition to
`the effects achieved by the ?rst invention, it becomes
`possible to transmit and receive other information.
`Therefore, When user and other user are both mobile objects,
`e.g., cars and they are going to a common destination by
`cars, since the user or other user can knoW user’s or other
`user’s Wrong course, if the user and other user can commu
`nicate With each other by an audio signal or the like through
`transmission and reception of other information, then it
`becomes possible for user and other user to communicate
`With each other Without providing radio transmitter and
`receiver separately.
`Having described preferred embodiments of the invention
`With reference to the accompanying draWings, it is to be
`understood that the invention is not limited to those precise
`embodiments and that various changes and modi?cations
`could be effected therein by one skilled in the art Without
`departing from the spirit or scope of the invention as de?ned
`in the appended claims.
`What is claimed is:
`1. A position detecting apparatus for a mobile object
`comprising:
`position detecting means mounted on a ?rst mobile object
`for detecting a position of said ?rs: mobile object;
`transmitting-receiving means for transmitting position
`information of said ?rst mobile object detected by said
`position detecting means and receiving position infor
`mation of a second mobile object transmitted from said
`second mobile object;
`memory means for storing map information; and
`display means supplied With said position information of
`said ?rst mobile object from said position detecting
`means, the position information of said mobile object
`from said transmitting-receiving means and map Infor
`mation read out from said memory means in response
`to said position information of one of said ?rst and
`second mobile objects and for displaying a map on
`Which a mark indicative of the position of said ?rst
`mobile object and/or the position of said second mobile
`object is put, Wherein
`said transmitting-receiving means transmits the position
`information of said ?rst mobile object detected by said
`position detecting means and identi?cation data of said
`?rst mobile object and receives the position informa
`tion of said second mobile object and identi?cation data
`of said second mobile object transmitted from said
`second navigation object, and
`said position detection apparatus includes identi?cation
`data judging means for supplying the position infor
`mation of said second mobile object to said memory
`means When said identi?cation data judging means
`determines that the identi?cation data of said second
`mobile object is predetermined identi?cation data.
`2. A position detection apparatus for a mobile object as
`claimed in claim 1, Wherein When said identi?cation data
`judging means determines that the identi?cation data of said
`second mobile object is said predetermined identi?cation
`data, then the identi?cation data of said second mobile
`object is supplied to said display means and said second
`mobile object is displayed on said display means With a
`mark different from that of said mobile object.
`3. A position detection apparatus for a mobile object as
`claimed in claim 1, Wherein said transmitting-receiving
`
`ZTE Exhibit 1025 - 10
`
`

`

`US 6,414,630 B1
`
`7
`means transmits the position information of said ?rst mobile
`object, the identi?cation data of said mobile objects and
`other information, and receives the position information of
`said second mobile object, the identi?cation data of said
`second mobile object and other information.
`4. A position detection apparatus for a mobile object as
`claimed in claim 3, Wherein said other information is audio
`information.
`5. A position detection apparatus for a mobile object as
`claimed in claim 1, Wherein When a distance betWeen said
`?rst and second mobile object is relatively short, said marks
`indicating said ?rst and second mobile objects are displayed
`on the same map, and When a distance betWeen said ?rst and
`second mobile objects is relatively long, said marks indi
`cating said ?rst and second mobile objects are respectively
`displayed on different maps.
`
`10
`
`15
`
`8
`6. A position detection apparatus for a mobile object as
`claimed in claim 1, Wherein the map information stored in
`said memory means contains information of transmission
`inhibited area in Which a transmission is inhibited, and When
`said ?rst mobile object lies in said transmission-inhibited
`area, the information of said transmission-inhibited area is
`supplied from said memory means to said transmitting
`receiving means thereby to inhibit a transmission operation
`of said transmitting-receiving means.
`7. A position detection apparatus for a mobile object as
`claimed in claim 1, Wherein said position detecting means
`obtains information of position, latitude and longitude of
`said ?rst mobile object by receiving radio Waves from a
`plurality of satellites.
`
`ZTE Exhibit 1025 - 11
`
`