WO2001013548A1 - Radio communications system for cars - Google Patents

Radio communications system for cars Download PDF

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Publication number
WO2001013548A1
WO2001013548A1 PCT/KR2000/000862 KR0000862W WO0113548A1 WO 2001013548 A1 WO2001013548 A1 WO 2001013548A1 KR 0000862 W KR0000862 W KR 0000862W WO 0113548 A1 WO0113548 A1 WO 0113548A1
Authority
WO
WIPO (PCT)
Prior art keywords
car
cars
identification number
communications system
radio communications
Prior art date
Application number
PCT/KR2000/000862
Other languages
French (fr)
Inventor
Johney Hwang
Original Assignee
Gentor.Com Inc.
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 Gentor.Com Inc. filed Critical Gentor.Com Inc.
Priority to AU61891/00A priority Critical patent/AU6189100A/en
Publication of WO2001013548A1 publication Critical patent/WO2001013548A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
    • 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]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems

Definitions

  • the present invention relates to a radio communications system for
  • cars more particularly, to a radio communications system for enabling
  • a driver of a running car expresses his or her intention
  • driver expresses his or her intention with the wireless device.
  • the driver expresses his or her intention with the wireless device.
  • Third method is using a mobile terminal of the driver such as
  • the present invention is designed to solve the problems
  • An object of the present invention is to provide a radio
  • the above object is the radio transmitting/ receiving means for receiving car
  • FIG. 1 is a block diagram for showing a radio communications
  • FIG. 1 is a block diagram of a radio communications system
  • a system 1 according to a first exemplary embodiment of the present
  • system control unit 10 includes a system control unit 10, a system memory 20 and a key input unit 30.
  • the system control unit 10 controls the general radio
  • system memory 20 which may be any of a ROM (Read Only Memory) or an
  • EEPROM Electrical Erasable and Programmable ROM
  • the key input unit 30 includes a plurality of keypads for selecting
  • the car information such as
  • car identification number may be stored in the system memory 20,
  • identification number may employ four numbers on a license plate and
  • the license plate instead of the number, the alphabet may be changed to
  • the key input unit 30 in a button pressing manner but a more preferred
  • the present system 1 further includes a Microphone (MIC) for MIC.
  • MIC Microphone
  • modulation/ demodulation unit 120 an expander 130, a voice control unit 140, a speaker (SPK), a radio transmitting/ receiving unit 150 and an
  • antenna 160 for transmitting/ receiving the voice.
  • the system control unit 10 controls the compressor 110, the voice
  • the microphone (MIC) and the speaker (SPK) may be configured to communicate
  • the system control unit 10 registers the car
  • the car identification number may be changed when required.
  • a driver in the vehicle may be changed when required.
  • a running car may communicate with other driver in a nearby running car
  • the driver in the nearby running car, the driver confirms numbers on the
  • the key data signal for dialing flows to the data modulation/ demodulation unit 100 and then is transmitted to the radio
  • the driver in the running car inputs a voice
  • the voice signal is then compressed by the
  • FM frequency modulation
  • the voice signal is then radio frequency
  • the voice signal received through the antenna In a receiving mode, the voice signal received through the antenna
  • the expander 130 are controlled by the voice control unit 140 and
  • the radio communications system of the present invention may be any radio communications system of the present invention.
  • GPS Global Positioning System
  • the GPS is a system for measuring a geographic location with use
  • the GPS is a system for
  • a user of the GPS may measure his or her 3-dimensional location by
  • the GPS device in which the GPS device is installed, includes an
  • antenna 200 for receiving a voice signal, a GPS receiver 210, a coordinate
  • measuring unit 220 an information storage 230, a comparing unit 240, a
  • FIG. 1 1).
  • the GPS receiver 210 converts a satellite RF
  • IF IF
  • the coordinate measuring unit 220 receives the converted digital
  • the information storage 230 includes storage areas for each car
  • information storage 230 stores the car identification number of the user
  • the antenna 200 is the antenna 200.
  • the comparing unit 240 receives the car identification number and
  • comparing unit 240 then compares the car location information of the
  • the display controller 300 controls the car identification number
  • the system control unit 10 inquires the GPS
  • the system control unit 10 controls the coordinate measuring unit 220 to
  • system control unit 10 reads the car location information
  • the information storage 230 and provides the information to the data
  • modulation/ demodulation unit 100 to modulates the information. And then the system control unit 10 transmits the modulated information
  • modulation/ demodulation unit 100 and temporally stores the car
  • the system control unit 10 reads the car
  • the comparing unit 240 compares the car location information of the
  • nearby running cars on the basis of the car location information of the user car and determines directions and locations of the nearby running
  • the system control unit 10 controls the display controller 300
  • the display unit 310 may be a LCD (Liquid Crystal Display).
  • display controller 300 may control the display unit 310 to display the car
  • system control unit 10 may control the display controller 300 to
  • present invention employs the GPS device and the display unit such that
  • the driver in the user car may check the locations and the identification
  • the driver may check the
  • the driver of the user car may obtain
  • the driver of the user car may also request to send to the nearby running car.
  • the driver of the user car may also request to send to the nearby running car.
  • the present invention provides a radio
  • present invention associated with the GPS device also provides more
  • the radio communications system for cars according to the present

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A radio communications system for cars, more particularly, a radio communications system for enabling radio call and communication between running cars without a particular repeater or a base station in a local area. The radio communications system for cars comprises radio transmitting/receiving means for transmitting/receiving car identification numbers of corresponding cars for communication between the cars with use of a common frequency for local area communication. And, the radio transmitting/receiving means receives car information including a car identification number and car location information from nearby running cars, stores the received car information temporally, compares the stored car information with car location information of a user car, displays the car information and the car location information of the nearby running cars in a screen, and transmits the displayed car identification number for communication with the nearby running car.

Description

RADIO COMMUNICATIONS SYSTEM FOR CARS
TECHNI AL FIELD
The present invention relates to a radio communications system for
cars, more particularly, to a radio communications system for enabling
radio call and communication between running cars without a particular
repeater or a base station in a local area.
BACKGROUND ART
Generally, a driver of a running car expresses his or her intention
to others with use of three methods. First, the driver blows a horn, turns
on a headlight or talks by signs or voices. But, the driver may not express
his or her intention exactly and may be in a danger of a traffic accident
with this method. Second, in case of cars having a predetermined wireless
device such as a mobile phone (that is, accompanying specifϊc cars), the
driver expresses his or her intention with the wireless device. The driver
may exchange his or her idea exactly in this method but it still has many
problems that talk to other driver having no wireless device in his or her
car is impossible and the driver should buy the wireless device when
necessary. Third method is using a mobile terminal of the driver such as
a portable phone or a personal cellular phone. In this method, the driver
also may exchange their idea exactly but there are limits on a receiving state and a speed of the running car. The driver also should know a phone
number of the mobile terminal of the driver in the nearby running car.
Consequently, the above methods fail to provide simple and
convenient communication between running cars, in an urgent situation,
for example, when asking one's way or finding a dangerous situation of an
advanced car.
DISCLOSURE OF INVENTION
Accordingly, the present invention is designed to solve the problems
in the prior art. An object of the present invention is to provide a radio
communications system for cars for transmitting/ receiving a
corresponding car identification number such that a driver in a car may
communicate with a driver in a nearby running car and may exchange
exact intention in an urgent situation.
An embodiment of the present invention in order to accomplish the
above object is a radio communications system for cars comprising radio
transmitting/ receiving means for transmitting/ receiving car identification
numbers of corresponding cars for communication between the cars with
use of a common frequency for local area communication.
Another embodiment of the present invention in order to accomplish
the above object is the radio transmitting/ receiving means for receiving car
information including a car identification number and car location information from nearby running cars, storing the received car information
temporally, comparing the stored car information with car location
information of a user car, displaying the car information and the car
location information of the nearby running cars in a screen, and
transmitting the displayed car identification number for communication
between the user car and the nearby running car.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features, aspects, and advantages of the present
invention will become better understood with regard to the following
description, appended claims, and accompanying drawing. In the
drawing:
FIG. 1 is a block diagram for showing a radio communications
system installed in a car according to the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be
described in detail with reference to the accompanying drawing.
FIG. 1 is a block diagram of a radio communications system
installed in a car according to the present invention.
A system 1 according to a first exemplary embodiment of the present
invention includes a system control unit 10, a system memory 20 and a key input unit 30.
The system control unit 10 controls the general radio
communications system according to a control program stored in the
system memory 20 which may be any of a ROM (Read Only Memory) or an
EEPROM (Electrically Erasable and Programmable ROM).
The key input unit 30 includes a plurality of keypads for selecting
various kinds of operation modes and inputting car information such as a
car identification number and a model of the car. The car information such
as the car identification number may be stored in the system memory 20,
which is readable and writable, or in another memory. Especially, the car
identification number may employ four numbers on a license plate and
may be different according to countries. In case of using an alphabet on
the license plate instead of the number, the alphabet may be changed to
the number.
The first exemplary embodiment of the present invention employs
the key input unit 30 in a button pressing manner but a more preferred
embodiment may employ a voice recognizing module instead of the key
input unit 30 for registering and dialing the car identification number by
telling the number.
The present system 1 further includes a Microphone (MIC) for
transmitting/ receiving a voice, a compressor 110, a voice
modulation/ demodulation unit 120, an expander 130, a voice control unit 140, a speaker (SPK), a radio transmitting/ receiving unit 150 and an
antenna 160 for transmitting/ receiving the voice.
The system control unit 10 controls the compressor 110, the voice
modulation /demodulation unit 120 and the expander 130.
The microphone (MIC) and the speaker (SPK) may be configured to
have a form of any or all of a handset, an earset or a baseset included in
the car.
Operations of the first exemplary embodiment of the present
invention are as follows.
At first, in a car identification number registration mode, if the car
identification number (4 numbers on the license plate) is inputted through
the key input unit 30, the system control unit 10 registers the car
identification number in the system memory 20(or, other memory unit).
The car identification number may be changed when required. A driver in
a running car may communicate with other driver in a nearby running car
with use of the registered car identification number.
For example, if the driver in the running car wants to call to other
driver in the nearby running car, the driver confirms numbers on the
license plate of the nearby running car with his or her eyes and presses
the numbers through the key input unit 30. Then, the system control unit
10 recognizes corresponding car number and generates a key data signal
for dialing. The key data signal for dialing flows to the data modulation/ demodulation unit 100 and then is transmitted to the radio
transmitting/ receiving unit 150 and the antenna 160 for establishing a
communications path to the nearby running car.
In a transmitting mode, the driver in the running car inputs a voice
signal with use of the microphone (MIC) through the established
communications path. The voice signal is then compressed by the
compressor 110 by control of the system control unit 10, and frequency
modulation (FM) modulated through the voice modulation /demodulation
unit 120 with suppressing a noise. The voice signal is then radio frequency
(RF) modulated through the radio transmitting/ receiving unit 150 and
transmitted to the nearby running car through the antenna 160.
In a receiving mode, the voice signal received through the antenna
160 is RF demodulated in the radio transmitting/ receiving unit 150 and
inputted into the voice modulation/ demodulation unit 120 by control of
the system control unit 10. And then, the voice signal is FM demodulated
after suppressing the noise of the voice signal, expanded through the
expander 130 and changed to the original voice signal. Then, outputs of
the expander 130 are controlled by the voice control unit 140 and
transmitted to the driver in the nearby running car through the speaker
(SPK).
The radio communications system of the present invention may
communicate with other radio communications system within a radius of 100M (visible distance) without a repeater.
A system 1 according to a second exemplary embodiment of the
present invention is associated with GPS (Global Positioning System) and
displays car information and car location information of cars in a
corresponding area of a screen in order to provide more convenient
communication.
The GPS is a system for measuring a geographic location with use
of satellites covering the earth. Particularly, the GPS is a system for
measuring a location of a mobile object on the earth, with use of a GPS
satellite, by calculating a distance and a changing speed of the distance.
A user of the GPS may measure his or her 3-dimensional location by
receiving a signal from the GPS satellite forming a constellation in about
20 thousand kilometers orbit in the sky and measuring the distance.
The system 1 according to the second exemplary embodiment of the
present invention, in which the GPS device is installed, includes an
antenna 200 for receiving a voice signal, a GPS receiver 210, a coordinate
measuring unit 220, an information storage 230, a comparing unit 240, a
display controller 300 and a display unit 310 (expressed with dot lines in
FIG. 1).
Of course, the system 1 of the second exemplary embodiment
includes the system control unit 10, the system memory 20, the key input
unit 30, the data modulation/ demodulation unit 100, the voice modulation/ demodulation unit 120 and the radio transmitting/ receiving
unit 150, as described in the system of the first exemplary embodiment.
Because these units are illustrated above, they are not explained
hereinafter again.
Referring to FIG. 1, the GPS receiver 210 converts a satellite RF
signal received through the antenna 200 into an intermediate frequency
(IF) signal and converts the IF signal to a baseband digital signal.
The coordinate measuring unit 220 receives the converted digital
signal from the GPS receiver 120 and measures a car location coordinate
of the user car according to a predetermined program.
The information storage 230 includes storage areas for each car
identification number and the car location information respectively. The
information storage 230 stores the car identification number of the user
car registered in each storage area, the car location information of the user
car received from the GPS receiver 210, the car identification number and
the car location information of the nearby running car received through
the antenna 200.
The comparing unit 240 receives the car identification number and
the car location information from the information storage 230. The
comparing unit 240 then compares the car location information of the
nearby running cars on a basis of the car location information of the user
car in order to display the nearest car first and determines a car identification number of the nearest car to be displayed.
The display controller 300 controls the car identification number
and the car location information outputted from the information storage
230 and the comparing unit 240 to be displayed on the display unit 310
by control of the system control unit 10.
Operations of the second exemplary embodiment are as follows.
Operations of a car identification number registration mode, a
transmitting mode and a receiving mode in the second exemplary
embodiment are not described in detail because they are similar to the
first exemplary embodiment.
In a waiting mode, the system control unit 10 inquires the GPS
satellite center about a current location of the user car or receives a signal
automatically transmitted from the GPS satellite center per a
corresponding time and distance through the GPS receiver 210. And then
the system control unit 10 controls the coordinate measuring unit 220 to
measure a current location and stores a measured coordinate value into
a corresponding storage area of the information storage 230 with the car
information including the car identification number.
Also, the system control unit 10 reads the car location information
and the car information including the car identification number stored in
the information storage 230 and provides the information to the data
modulation/ demodulation unit 100 to modulates the information. And then the system control unit 10 transmits the modulated information
through the radio transmitting/ receiving unit 150 and the antenna 160
when the corresponding time is elapsed and the corresponding distance
is passed.
And, the car information and the car location information
transmitted from the radio communications system are temporally stored
in the information storage 230 of the system. The system control unit 10
demodulates a data signal in the signal received through the radio
transmitting/ receiving unit 150 with use of the data
modulation/ demodulation unit 100 and temporally stores the car
information and the car location information of the nearby running car
from the demodulated data into a corresponding area of the information
storage 230.
In case that the driver in the running car wants to communicate
with a driver in a nearby running car, the driver confirms a car
identification number of the nearby running car on the display screen and
starts the communication.
In a display mode, the system control unit 10 reads the car
identification number and the car location information in the information
storage 230 and then provides the information to the comparing unit 240.
The comparing unit 240 compares the car location information of the
nearby running cars on the basis of the car location information of the user car and determines directions and locations of the nearby running
cars on the basis of the user car. According to a determination of the
comparing unit 240, the car identification number to be displayed is
determined.
Then, the system control unit 10 controls the display controller 300
to display the car identification number according to the determination of
the comparing unit 240 on the display unit 310.
The display unit 310 may be a LCD (Liquid Crystal Display). The
display controller 300 may control the display unit 310 to display the car
identification number of the nearby running car or to display the car
location information and the car identification information in a moving
picture at the same time according to a speed of the nearby running car.
Also, the system control unit 10 may control the display controller 300 to
display the nearest car first according to the determination of the
comparing unit 240.
The system 1 according to the second exemplary embodiment of the
present invention employs the GPS device and the display unit such that
the driver in the user car may check the locations and the identification
numbers of the nearby running cars on a display screen and communicate
with the driver in the nearby running car more conveniently.
For example, in the transmitting mode, the driver may check the
display screen and select the desired car identification number for starting the communication. Selecting a car image displayed on the moving picture
screen such as a touch screen may also start the communication.
In the receiving mode, the driver of the user car may obtain
information of the driver in the nearby running car with displaying images
representing the car identification number and the car location
information of the nearby running car. The driver of the user car may also
adds a receipt refusing function for refusing the communication.
As described above, the present invention provides a radio
communications path by inputting the corresponding car identification
number (numbers on the license plate) without a repeater when the driver
wants to communicate with other driver in a nearby running car. The
present invention associated with the GPS device also provides more
convenient call and communication with the nearby running car by
displaying the car location information and the car identification number
of the nearby running car.
The radio communications system for cars according to the present
invention has been described in detail. However, it should be understood
that the detailed description and specific examples, while indicating
preferred embodiments of the invention, are given by way of illustration
only, since various changes and modifications within the spirit and scope
of the invention will become apparent to those skilled in the art from this
detailed description.

Claims

What is claimed is:
1. A radio communications system for cars comprising radio
transmitting/ receiving means for transmitting/ receiving car identification
numbers of corresponding cars for communication between the cars with
use of a common frequency for local area communication.
2. The radio communications system for cars as claimed in claim
1 , wherein the car identification number is a numerical order written on a
license plate of the car.
3. The radio communications system for cars as claimed in claim
1, further comprising:
a system memory for storing a control program for the system;
system control means for controlling the radio communications
system according to the control program in the system memory;
input means for selecting various operation modes and inputting car
information including the car identification number and a model of the
car; and
a read/write memory for storing the car information including the
car identification number.
4. The radio communications system for cars as claimed in claim
3, wherein the radio transmitting/ receiving means includes:
a transmitting unit for compressing a voice signal inputted through
a microphone with use of a data compressor by control of the system
control means, frequency modulating (FM) the voice signal with voice
modulating/ demodulating means , suppressing a noise, radio frequency
(RF) modulating the voice signal and transmitting the voice signal through
an antenna; and
a receiving unit for RF demodulating a voice signal received through
the antenna, suppressing a noise with use of the voice
modulating/ demodulating means, FM demodulating the voice signal,
expending the voice signal with use of a data expender and outputting the
voice signal through a speaker.
5. The radio communications system for cars as claimed in claim
3, wherein the input means includes a plurality of function keys for
selecting the operation modes and a plurality of numerical keys for
inputting the car information including the car identification number and
the model of the car.
6. The radio communications system for cars as claimed in claim
3, wherein the input means is a voice recognizing module which recognizes a function word for selecting the operation mode by a voice and recognizes
a plurality of numerical sounds for inputting the car information including
the car identification number and the model of the car.
7. The radio communications system for cars as claimed in claim
4, wherein the microphone and the speaker of the radio
transmitting/ receiving means are integrated into one body in form of a
handfree set.
8. The radio communications system for cars as claimed in claim
1, wherein the radio transmitting/ receiving means communicates with
other radio transmitting/ receiving means installed on a nearby running
car within a predetermined area without a repeater.
9. The radio communications system for cars as claimed in claim
1, wherein the radio transmitting/ receiving means receives car information
including a car identification number and car location information from
nearby running cars, stores the received car information temporally,
compares the stored car information with car location information of a
user car, displays the car information and the car location information of
the nearby running cars in a screen, and transmits the displayed car
identification number for communication between the user car and the nearby running car.
10. The radio communications system for cars as claimed in
claim 9, further comprising:
a system memory for storing a control program for the system;
system control means for controlling the whole radio
communications system according to the control program in the system
memory;
input means for selecting various operation modes and inputting car
information including the car identification number and a model of the
car;
GPS (Global Positioning System) means for estimating a 3-
demensional user car location with receiving a signal from a satellite and
measuring a distance; and
display means for processing and displaying the car location
information and the car information including the car identification
number of the user car obtained from the GPS means and the car location
information and the car information including the car identification
number of the nearby running car received by the radio
transmitting/ receiving means by control of the system control means,
wherein the radio transmitting/ receiving means periodically
transmits the car location information and the car information including the car identification number of the user car and transmits/ receives a
voice signal by calling the car identification number of the nearby running
car recognized on the display means by control of the system control
means.
11. The radio communications system for cars as claimed in claim
10, wherein the GPS means includes:
a GPS receiver for converting a satellite radio frequency (RF) signal
received through a first antenna into an intermediate frequency (IF) signal
and converting the IF signal into a baseband digital signal again; and
coordinate measuring means for receiving the converted digital
signal of the GPS receiver by control of the system control means and
measuring a user car location coordinate according to a predetermined
program.
12. The radio communications system for cars as claimed in claim
10, further comprising:
an information storage for storing the car identification number and
the car location information of the user car by control of the system
control means, and then storing the car identification number and the car
location information of the nearby running cars respectively; and
comparing means for receiving the car identification number and the car location information from the information storage, comparing the car
location information of the nearby running cars with the car location
information of the user car, selecting a car to be displayed and then
outputting data of the selected car.
13. The radio communications system for cars as claimed in claim
12, wherein the display means further includes:
a display unit; and
a display controller for controlling the data outputted from the
comparing means, the car identification number and the car location
information outputted from the information storage to be displayed on the
display unit by control of the system control means.
14. The radio communications system for cars as claimed in claim
13, wherein the display unit is a LCD (Liquid Crystal Display).
15. The radio communications system for cars as claimed in claim
13, wherein the display unit is a touch screen.
16. The radio communications system for cars as claimed in claim
10, wherein the radio transmitting/ receiving means further includes:
voice transmitting means for compressing a voice signal inputted through a microphone with use of a data compressor by control of the
system control means, FM modulating the voice signal with voice
modulation/ demodulation means , suppressing a noise from the voice
signal, RF modulating the voice signal and transmitting the voice signal
through a second antenna;
voice receiving means for RF demodulating the voice signal received
through the second antenna, suppressing a noise from the voice signal
with use of the voice modulation/ demodulation means, FM demodulating
the voice signal, expending the voice signal with use of a data expender
and outputting the voice signal through a speaker ; and
data transmitting/ receiving means for RF modulating/ demodulating
the signal received through the second antenna, IF
modulating/ demodulating the received signal and
modulating/ demodulating the signal into a baseband digital signal by
control of the system control means.
PCT/KR2000/000862 1999-08-16 2000-08-04 Radio communications system for cars WO2001013548A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61891/00A AU6189100A (en) 1999-08-16 2000-08-04 Radio communications system for cars

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1999/33717 1999-08-16
KR1019990033717A KR100337136B1 (en) 1999-08-16 1999-08-16 Radio communication system between vehicles

Publications (1)

Publication Number Publication Date
WO2001013548A1 true WO2001013548A1 (en) 2001-02-22

Family

ID=19607370

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/000862 WO2001013548A1 (en) 1999-08-16 2000-08-04 Radio communications system for cars

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Country Link
KR (1) KR100337136B1 (en)
AU (1) AU6189100A (en)
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